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Gwaze, Arnold Rumosa. "A cox proportional hazard model for mid-point imputed interval censored data." Thesis, University of Fort Hare, 2011. http://hdl.handle.net/10353/385.
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There has been an increasing interest in survival analysis with interval-censored data, where the event of interest (such as infection with a disease) is not observed exactly but only known to happen between two examination times. However, because so much research has been focused on right-censored data, so many statistical tests and techniques are available for right-censoring methods, hence interval-censoring methods are not as abundant as those for right-censored data. In this study, right-censoring methods are used to fit a proportional hazards model to some interval-censored data. Transformation of the interval-censored observations was done using a method called mid-point imputation, a method which assumes that an event occurs at some midpoint of its recorded interval. Results obtained gave conservative regression estimates but a comparison with the conventional methods showed that the estimates were not significantly different. However, the censoring mechanism and interval lengths should be given serious consideration before deciding on using mid-point imputation on interval-censored data.
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Cooley, Patrick J. "Initiation and growth of mid-Holocene coral reefs, Cleveland Point, Moreton Bay, Queensland." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/107981/2/Patrick_Cooley_Thesis.pdf.
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This thesis details the geomorphology and timing of the mid-Holocene fossil reef at Cleveland Point, Moreton Bay, Queensland. This research presents the first subsurface data from percussion cores through the reef. Results reveal that Cleveland Point reef initiated quickly after rising seas flooded their foundations 7300 years ago. The reef remained in a "catch-up" growth mode from 7300 to 5700 years ago before reef accretion ceased. Age data suggests that the termination of the reef occurred 5700 years ago and coincided with a hypothesized lowering of sea-level and a possible change in terrigenous sediment distribution in Moreton Bay.
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Major, Josef. "Controls on mid-Holocene fringing reef growth and termination in a high latitude, estuarine setting, Wellington Point, Southeast Queensland." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/63964/1/Josef_Major_Thesis.pdf.
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Several fringing coral reefs in Moreton Bay, Southeast Queensland, some 300 km south of the Great Barrier Reef (GBR), are set in a relatively high latitude, estuarine environment that is considered marginal for coral growth. Previous work indicated that these marginal reefs, as with many fringing reefs of the inner GBR, ceased accreting in the mid-Holocene. This research presents for the first time data from the subsurface profile of the mid-Holocene fossil reef at Wellington Point comprising U/Th dates of in situ and framework corals, and trace element analysis from the age constrained carbonate fragments. Based on trace element proxies the palaeo-water quality during reef accretion was reconstructed. Results demonstrate that the reef initiated more than 7,000 yr BP during the post glacial transgression, and the initiation progressed to the west as sea level rose. In situ micro-atolls indicate that sea level was at least 1 m above present mean sea level by 6,680 years ago. The reef remained in "catch-up" mode, with a seaward sloping upper surface, until it stopped aggrading abruptly at ca 6,000 yr BP; no lateral progradation occurred.
Changes in sediment composition encountered in the cores suggest that after the laterite substrate was covered by the reef, most of the sediment was produced by the carbonate factory with minimal terrigenous influence. Rare earth element, Y and Ba proxies indicate that water quality during reef accretion was similar to oceanic waters, considered suitable for coral growth. A slight decline in water quality on the basis of increased Ba in the later stages of growth may be related to increased riverine input and partial closing up of the bay due to either tidal delta progradation, climatic change and/or slight sea level fall. The age data suggest that termination of reef growth coincided with a slight lowering of sea level, activation of ENSO and consequent increase in seasonality, lowering of temperatures and the constrictions to oceanic flushing. At the cessation of reef accretion the environmental conditions in the western Moreton Bay were changing from open marine to estuarine. The living coral community appears to be similar to the fossil community, but without the branching Acropora spp. that were more common in the fossil reef. In this marginal setting coral growth periods do not always correspond to periods of reef accretion due to insufficient coral abundance. Due to several environmental constraints modern coral growth is insufficient for reef growth. Based on these findings Moreton Bay may be unsuitable as a long term coral refuge for most species currently living in the GBR.
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Trevis, Isaac Andrew. "Assessing and Tracking Nitrate Contamination from a Point Source and the Effects on the Groundwater Systems in Mid Canterbury, New Zealand." Thesis, University of Canterbury. Department of Geological Sciences, 2012. http://hdl.handle.net/10092/7603.
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Water is a valuable and crucial resource, the protection of which poses environmental, social and economic challenges. Fundamental to the sustainable use of water is effective management. In the Canterbury region of New Zealand, nitrate contamination has become a resource management issue due to changes in land use and intensification, which have placed pressure on the region’s groundwater and surface water systems.
The purpose of this study was to assess and track nitrate concentrations on the Central Canterbury Plains with specific emphasis on a local point source of nitrate, the Ashburton Meat Processors plant. To make this assessment review of historical data was followed by the collection of 131 groundwater and 25 surface water samples to analyse the geochemical properties of the water and the stable isotopic composition of nitrate in the water. It was hypothesised that nitrate concentrations at a regional scale have increased since regular records began and that the stable isotopic composition of different nitrate sources are not discernable.
Nitrate concentrations across the Canterbury region were found to have increased, prompting concerns about water quality. Concentrations are elevated above natural background levels across much of the Canterbury Plains and extreme concentrations are associated with local point sources of nitrate. Nitrate concentrations down gradient of the Ashburton Meat Processing plant are shown to have declined approximately 5% per year for the past ten years, which is in contrast to the rest of the region, where average concentrations have nearly doubled in 20 years. The reduction of contamination from the point source is most likely the result of the implementation of better wastewater management practices in the early 21st century.
The δ18O and δ15N values of nitrate were found to be relatively homogenous over the Canterbury Plains. Therefore, it is suggested by this study that the dual-isotope approach alone, is not a viable tool for nitrate source identification in the region. The uniform nitrate stable isotopic composition in Canterbury could be attributed to a single, principle source of nitrate, such as clover, that overprints other isotopic compositions of nitrate source, or may also be the result of soil processes and the farming techniques used in the region.
This research presents important findings for the future of identifying and managing nitrate sources in the Canterbury region. Better management practices are required for the diffuse source(s) of nitrate contributing to the widespread contamination. Critical thinking and the willingness of stakeholders to engage in the identifying, documenting and solving problems is necessary to ensure the effective management and sustainability of this precious resource.
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Mougel, Bérengère. "Variabilité géochimique du manteau à très petite échelle sous la dorsale Est-Pacifique (15°37' - 15°47'N)." Thesis, Brest, 2013. http://www.theses.fr/2013BRES0075/document.
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Le segment 16°N de la dorsale Est-Pacifique (EPR) interagit avec le point chaud des Mathématiciens (PCM). A partir de l’analyse géochimique de 120 échantillons de verres basaltiques prélevés par submersible Nautile (campagne à la mer PARISUB 2010) coulée par coulée, ce travail présente une étude à très petite échelle de l’hétérogénéité chimique du manteau sous quelques kilomètres de dorsale (15°37’N et 15°47’N). Les résultats obtenus témoignent d’une variabilité géochimique jamais observée à si petite échelle sous une dorsale. Le degré d’hétérogénéité du manteau dans cette zone est comparable à celui de l’ensemble de l’EPR. Cette diversité est le produit du mélange entre trois sources mantelliques principales, caractérisant l’influence et l’hétérogénéité du point chaud. La densité de l’échantillonnage offre une résolution spatiale en adéquation avec les données bathymétriques, ce qui a permis de coupler les deux approches et faire une reconstruction spatio-temporelle de l’évolution géochimique et morphologique du système EPR/PCM.Celle-ci commence il y a environ 600 ka par le gonflement du segment et un changement général dans la composition du manteau ambiant, suivi de deux sauts d’axe successifs en direction de la chaîne il y a 250 et 150 ka. Lors de cette phase de rapprochement de nouvelles signatures géochimiques émergent ponctuellement dans les MORB. Parmi elles,une signature relique de manteau appauvri régional, une autre d’hétérogénéité enrichie locale, et enfin celle de deux types d’hétérogénéités contenues dans la source du PCM.Cette dernière, n’apparaît dans les MORB qu’au cours des 100 dernières années autour de 15°44’N, et constitue une signature géochimique inédite pour des MORB. Ce nouveau composant a la particularité d’avoir du Pb très peu radiogénique ("Unradiogenic Lead Component", ULC) associé à des signatures isotopiques en Sr, Nd et Hf enrichies.Les compositions en éléments majeurs, traces et isotopes (Sr, Nd, Hf, Pb et He) suggèrent l’implication de matériel métagabbroique, ancien (>2Ga) à affinité continentale.La présence de sulfures dans la source permettrait d’expliquer le Pb peu radiogénique.Le recyclage dans le manteau supérieur de pyroxénites à sulfures, provenant de la partie profonde d’anciens arcs continentaux permettrait d’expliquer l’origine de ULC. Les basaltes ULC seraient donc les témoins volcaniques de la fusion de ce réservoir discret qui contribue à résoudre le paradoxe du Pb<br>120 Mid-Ocean-Ridge basaltic (MORB) glasses were collected on discrete lava flow (~200m sampling interval) during submersible dives along the East-Pacific-Rise (EPR), between 15°37’N and 14°47’N, precisely where the ridge intersects the Mathematicianshotspot track. The data display a geochemical variability that has never been observedalong a ridge at such a small spatial scale. The range of isotopic compositions along this 15 km segment is commensurable to that of the entire EPR. It can be accounted for by a mixture of three main components, representative of the hotspot heterogeneity.The dense sampling, along and across the ridge segment, matches the resolution of themicro-bathymetric data, which made the spatio-temporal reconstruction of the geochemical and morphological evolution of the EPR/Mathematician hotspot system possible.The latest starts 600 kya with the segment inflation and a global change in the ambient mantle composition, followed by two successive jumps of the ridge axis (250 and 150 kya) towards the seamounts chain. During this phase as the two systems are getting closer,new geochemical signatures emerge in MORB. Among them, relics of regional depleted mantle, small enriched local heterogeneities, and two types of heterogeneities belonging to the hotspot source. The last one become apparent only during the last 100 yearsaround 15°44’N, and constitutes a novel geochemical signature for MORB. This new component’s most noticeable property is its very unradiogenic Pb ("Unradiogenic Lead Component", ULC) associated with mostly enriched Sr, Nd and Hf isotopic signatures. Putted together, major, trace elements and isotopes (Sr, Nd, Hf, Pb and He) suggest anancient (>2Ga) lower continental metagabbroic origin for this material, while the involvement of sulfides is considered in order to explain the unradiogenic lead compositions. Overall, the preferred model for the formation of ULC is the recycling within the uppermantle of sulfide bearing pyroxenites coming from continental arc roots. ULC-influenced basalts represent magmatic witnesses of the melting of this cryptic reservoir that can contribute to solve the Pb paradox
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Sorensen, Amanda Elizabeth MacKay. "Geologic mapping of exhumed, mid-Cretaceous paleochannel complexes near Castle Dale, Emery County, Utah: On the correlative relationship between the Dakota Sandstone and the Mussentuchit Member of the Cedar Mountain Formation." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2727.
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Numerous well-preserved, exhumed paleochannels in the Morrison, Cedar Mountain and Dakota Sandstone formations are exposed east of Castle Dale, Utah. These channels consist primarily of point bar complexes and scattered, low sinuosity channels. To determine the vertical and lateral relationships of these channels within the Cedar Mountain and Dakota Sandstone formations, a 1:24,000 scale geologic map covering ~140 km2 was created showing the fluvial sandstones. In the study area the Cedar Mountain Formation consists, from bottom to top, of 2.5-10 m of Buckhorn Conglomerate Member equivalent units, ~80 m of the Ruby Ranch Member, and ~30 m of the Mussentuchit Member. The Dakota Sandstone consists of conglomeratic to sandy, meandering channel fills within the Mussentuchit Member. The Ruby Ranch-Mussentuchit member contact is diagnosed as the top of a laterally extensive, ~10 meter thick, maroon paleosol with calcrete horizons and root traces. When deeply weathered the contact is discernable as a shift from maroon mudstone to a pale green-white, silty mudstone. Like the balance of the Mussentuchit Member overbank deposits, the white-green mudstone is rich in smectitic clays. In the southern one-third of the mapped area, Ruby Ranch Member sandstones are thin, discontinuous channel segments surrounded by floodplain deposits. In the middle to northern area, point bar complexes dominate, some of which are laterally amalgamated. Flow direction data from four meander complexes and a low sinuosity channel indicate an average northeast flow. Dakota Sandstone channels all of which are within the Mussentuchit Member also flowed to the northeast but point bar complexes are both more numerous and more laterally continuous than in the Ruby Ranch Member, indicating deposition in an area with less accommodation space than during Ruby Ranch Member time. The data indicate the Dakota Sandstone consists exclusively of fluvial sandstones encased within the Mussentuchit Member of the Cedar Mountain Formation. Therefore, these units are coeval and simply different facies of the same depositional system. Consequently the Mussentuchit Member is considered a member facies of the Dakota Formation.
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Cunha, Camilla Lima. "Estudo da previsão de propriedades do biodiesel utilizando espectros de infravermelho e calibração multivariada." Universidade do Estado do Rio de Janeiro, 2014. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=7293.
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O biodiesel tem sido amplamente utilizado como uma fonte de energia renovável, que contribui para a diminuição de demanda por diesel mineral. Portanto, existem várias propriedades que devem ser monitoradas, a fim de produzir e distribuir biodiesel com a qualidade exigida. Neste trabalho, as propriedades físicas do biodiesel, tais como massa específica, índice de refração e ponto de entupimento de filtro a frio foram medidas e associadas a espectrometria no infravermelho próximo (NIR) e espectrometria no infravermelho médio (Mid-IR) utilizando ferramentas quimiométricas. Os métodos de regressão por mínimos quadrados parciais (PLS), regressão de mínimos quadrados parciais por intervalos (iPLS), e regressão por máquinas de vetor de suporte (SVM) com seleção de variáveis por Algoritmo Genético (GA) foram utilizadas para modelar as propriedades mencionadas. As amostras de biodiesel foram sintetizadas a partir de diferentes fontes, tais como canola, girassol, milho e soja. Amostras adicionais de biodiesel foram adquiridas de um fornecedor da região sul do Brasil. Em primeiro lugar, o pré-processamento de correção de linha de base foi usado para normalizar os dados espectrais de NIR, seguidos de outros tipos de pré-processamentos que foram aplicados, tais como centralização dos dados na média, 1 derivada e variação de padrão normal. O melhor resultado para a previsão do ponto de entupimento de filtro a frio foi utilizando os espectros de Mid-IR e o método de regressão GA-SVM, com alto coeficiente de determinação da previsão, R2Pred=0,96 e baixo valor da Raiz Quadrada do Erro Médio Quadrático da previsão, RMSEP (C)= 0,6. Para o modelo de previsão da massa específica, o melhor resultado foi obtido utilizando os espectros de Mid-IR e regressão por PLS, com R2Pred=0,98 e RMSEP (g/cm3)= 0,0002. Quanto ao modelo de previsão para o índice de refração, o melhor resultado foi obtido utilizando os espectros de Mid-IR e regressão por PLS, com excelente R2Pred=0,98 e RMSEP= 0,0001. Para esses conjuntos de dados, o PLS e o SVM demonstraram sua robustez, apresentando-se como ferramentas úteis para a previsão das propriedades do biodiesel estudadas<br>Biodiesel has been widely used as a renewable energy source which contributes to the mineral diesel decrease demand. Therefore, there are several properties that must be monitored in order to produce and distribute biodiesel with the required quality. In this work, the biodiesel physical properties such as specific mass, refractive index and cold filter plugging point were measured and associated with near infrared spectroscopy (NIR) and mid-Infrared spectroscopy (mid-IR) spectra using chemometric tools. The Partial Least Squares Regression (PLS), Interval Partial Least Squares Regression (iPLS), and Support Vector Machines Regression (SVM) with variable selection by Genetic Algorithm (GA) methods were used to model the aforementioned properties. The biodiesel samples were synthesized from different sources such as canola, sunflower, corn, and soybean. Additional biodiesel samples were purchased from a Brazil South Region supplier. Firstly, the preprocessing baseline correction was used to normalize the NIR spectral data, following others preprocessing types were applied in such as the mean center, the first derivative and standard normal variate. The best result for predicting the cold filter plugging point was using Mid-IR spectra and GA-SVM regression method, with high coefficient determination of prediction, R2Pred = 0.94 and low value of the Root Mean Square Error of Prediction, RMSEP (C) = 0.7. For the specific mass prediction model, the best result was obtained using the Mid-IR spectrums and PLS regression, with the R2Pred = 0.98 and RMSEP (g/cm3) = 0.0002. As for a prediction model for the refractive index, the best result was obtained using the Mid-IR spectrums and PLS regression, with the R2Pred = 0.98 and RMSEP = 0.0001. For these datasets, the PLS and SVM models demonstrated theirs robustness, presenting themselves as useful tools for the biodiesel properties prediction studied
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Munschy, Marc. "Etude geophysique detaillee du point triple de rodriguez et de la zone axiale des trois dorsales associees (ocean indien)." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13057.
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L'etude geophysique detaillee (bathymetrie seabeam, gravimetrie, magnetisme) du point triple rodriguez et d'un segment de la zone axiale des trois dorsales oceaniques associees situe a environ 400 km du point triple, a permis de realiser des cartes bathymetriques, gravimetriques et magnetiques de ces quatre zones qui representent des surfaces d'environ 8500 km**(2)
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GIANTESIO, Giulia. "MHD stagnation-point flow." Doctoral thesis, Università degli studi di Ferrara, 2013. http://hdl.handle.net/11392/2388856.
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The flow near a stagnation-point is a fundamental topic in fluid dynamics and it has
been studied by several researches during the past decades because of its relevant
applications.
In this Thesis we investigate the influence of the electromagnetic field on the
stagnation-point flow of a Newtonian or a micropolar fluid. To this end we consider
three types of such a motion: plane orthogonal, plane oblique and three-dimensional.
We take into consideration a fluid which moves towards a flat surface.
We descrive several situations which are relevant from a physical point of view when
an external uniform or not uniform electromagnetic field is impressed.
Actually, we have prove that if the external magnetic field is uniform and the induced
magnetic field is neglected, then the stagnation-point flow exists if, and only, if
the external magnetic field has some suitable directions. Further, we compute the
induced magnetic field in the other cases.
We prove also that if the external magnetic field is not uniform and it is parallel to
the velocity at infinity then the three-dimensional stagnation-point flow is possible
if and only if it is axisymmetric.
In all the cases here considered, the MHD PDEs which govern the motion are
reduced to a system of nonlinear ODEs. These boundary values problems are then
integrated numerically and some graphics and tables are furnished in order to show
the behaviour of the solution near the obstacle.
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Surrarrer, Caroline A. "BEHIND THE LABELS: LIBBY PAYNE, FASHION DESIGNER FOR "MRS. MAIN STREET AMERICA"." Kent State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=kent1461236604.
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Jalkebo, Charlotte. "Placement of Controls in Construction Equipment Using Operators´Sitting Postures : Process and Recommendations." Thesis, Linköpings universitet, Maskinkonstruktion, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-108980.
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An ergonomically designed work environment may decrease work related musculoskeletal disorders, lead to less sick leaves and increase production time for operators and companies all around the world. Volvo Construction Equipment wants to deepen the knowledge and investigate more carefully how operators are actually sitting whilst operating the machines, how this affects placement of controls and furthermore optimize controls placements accordingly. The purpose is to enhance their product development process by suggesting guidelines for control placement with improved ergonomics based on operators’ sitting postures. The goal is to deliver a process which identifies and transfers sitting postures to RAMSIS and uses them for control placement recommendations in the cab and operator environments. Delimitations concerns: physical ergonomics, 80% usability of the resulted process on the machine types, and the level of detail for controls and their placements. Research, analysis, interviews, test driving of machines, video recordings of operators and the ergonomic software RAMSIS has served as base for analysis. The analysis led to (i) the conclusion that sitting postures affect optimal ergonomic placement of controls, though not ISO-standards, (ii) the conclusion that RAMSIS heavy truck postures does not seem to correspond to Volvo CE’s operators’ sitting postures and (iii) and to an advanced engineering project process suitable for all machine types and applicable in the product development process. The result can also be used for other machines than construction equipment. The resulted process consists of three independent sub-processes with step by step explanations and recommendations of; (i) what information that needs to be gathered, (ii) how to identify and transfer sitting postures into RAMSIS, (iii) how to use RAMSIS to create e design aid for recommended control placement. The thesis also contains additional enhancements to Volvo CE’s product development process with focus on ergonomics. A conclusion is that the use of motion capture could not be verified to work for Volvo Construction Equipment, though it was verified that if motion capture works, the process works. Another conclusion is that the suggested body landmarks not could be verified that they are all needed for this purpose except for those needed for control placement. Though they are based on previous sitting posture identification in vehicles and only those that also occur in RAMSIS are recommended, and therefore they can be used. This thesis also questions the most important parameters for interior vehicle design (hip- and eye locations) and suggests that shoulder locations are just as important. The thesis concluded five parameters for control categorization, and added seven categories in addition to those mentioned in the ISO-standards. Other contradictions and loopholes in the ISO-standards were identified, highlighted and discussed. Suggestions for improving the ergonomic analyses in RAMSIS can also be found in this report. More future research mentioned is more details on control placement as well as research regarding sitting postures are suggested. If the resulted process is delimited to concern upper body postures, other methods for posture identification may be used.
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Eriksson, Johan. "Visuell presentation i slöjd : Positivt med power point?" Thesis, Umeå University, Creative Studies (Teacher Education), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1666.
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<p>Detta arbete undersöker problematiken i att visuellt framföra och presentera ett arbetsområde i ämnet träslöjd. Uppsatsen handlar även om och hur slöjdlärare kan undvika onödig stress. Syftet med uppsatsen är att undersöka hur man i träslöjd kan utvidga sättet att presentera uppgifter för eleverna på ett inspirerande, innehållsrikt och konkret sätt. Genom att bedriva en praktisk visuell presentation i form av Power Point har jag fått en uppfattning om ett alternativ till den traditionella undervisningsformen i träslöjd. En utvärdering gjordes med eleverna efter Power Point presentationen och den visade bland annat att eleverna i år 4 fick mer utbyte av uppgiften jämfört med år 5-6. Mina egna iakttagelser har satts i relation till elevernas genom denna utvärdering. Av utvärderingen framgick även att bara en elev hellre ville ha katederundervisning istället för Power Point. Detta positiva bemötande av alternativa visuella metoder i träslöjden visar på en outnyttjad resurs. Intresse och engagemang hos eleverna påverkade mängden kunskap som eleverna kunde ta in.</p>
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Kvarnström, Victor, and Jessica Wallerström. "Realtidsmätning inom fastighetsbildning med "Precise Point Positioning" (PPP)." Thesis, Högskolan Väst, Avdelningen för data-, elektro- och lantmäteriteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-9503.
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Vid GNSS-positionering i samband med fastighetsbildningsåtgärder används vanligtvis den traditionella RTK-mätningen (Real-Time Kinematic) via SWEPOS nätverks-RTK-tjänst. Denna tjänst kräver mobiltelefontäckning eller motsvarande tvåvägskommunikation, vilket kan vara problematiskt inom områden med bristfällig mobiltelefontäckning. Under dessa förhållanden kan istället PPP-mätning (Precise Point Positioning) vara användbart vid fastighetsbildningsåtgärder då dessa tjänster tar emot korrektionsdata i realtid från satelliter. PPP kräver inte någon mobiltelefontäckning, däremot krävs en kommunikationslänk, en RTX-tjänst för att erhålla korrektioner externt från en RTX-satellit. Syftet med studien är att undersöka möjligheten till att nyttja PPP i realtid vid fastighetsbildningsåtgärder som ett alternativ till traditionell GNSS-mätning med nätverks-RTK. För att PPP ska vara ett alternativ till traditionell GNSS-mätning i realtid krävs det att mätosäkerhetskraven inom fastighetsbildning uppfylls. Mätosäkerheten undersöktes genom att utgå ifrån redan kända koordinater (RIX 95-punkter). Mätningarna har genomförts på fem olika platser i Sverige, Göteborg, Vänersborg, Karlstad, Torsby och Malung-Sälen. Mätdata som erhölls från undersökningsplatserna har analyserats samt jämförts med fastighetsbildningskraven. Resultatet av studien erhölls i form av analyserad mätdata med jämförelser mot redan kända (RIX 95) punkter. Avikelsen från känd RIX 95-punkt redovisas i resultatet utifrån tidsaspekten, den systematiska avvikelsen av translativ art, förändringar i avvikelsen från söder till norr samt utifrån två beräkningsmodeller, varav en translation och en transformation. För att få den erhållna mätdatan från RTX-tjänsten att överensstämma bättre med referenspunkten (RIX 95-punkten) togs beräkningsmodellerna fram för att möjliggöra modellering av systematiska avvikelser som uppkommit och därmed uppfylla kraven inom fasighetsbildningsåtgärder. Genom att ha analyserat och granskat olika samband har det framkommit att efter ca 20 minuters mätning, börjar precisionen för mätningarna att bli stabila. Utifrån resultatet är slutsatsen att PPP inte fungerar vid fastighetsbildningsåtgärder för områden inom stomnät, däremot fungerar metoden för skogs- och jordbruksfastigheter utanför stomnät. Förutsatt att en modellering genom translation alternativt transformation som är framtagen i denna studie används för att justera koordinaterna så fungerar PPP-mätning inom samtliga fastighetsbildningsåtgärder. Detta kräver då att mätdata erhålls efter 20 minuters mätning eller mer.<br>GNSS positioning in conjunction with the real property is usually used the traditional RTK measuring (Real-Time Kinematic) by SWEPOS network RTK service. This service requires mobile phone coverage or equivalent two-way communication, which can be problematic in areas with poor mobile phone coverage. Under these circumstances, PPP (Point Positioning Precise) could be more useful in real property measures when such services receives the correction data in real time from the satellites. PPP does not require any cell phone coverage, however it requires a communication link, a RTX service to obtain corrections externally from a RTX satellite. The purpose of the study is to examine the possibility of using PPP in real time at the real property as an alternative to traditional GNSS measurements with network RTK. The measurement uncertainty was investigated by starting out from already known coordinates (RIX 95 points). The measurements were performed out at five different locations in Sweden, Gothenburg, Vanersborg, Karlstad, Torsby and Malung-Salen. Measurement data obtained from the observations have been analyzed and compared with real property requirements. The results of the study were obtained in the form of data analyzed by comparison of the known (RIX 95) points. The deviation is known from RIX 95 point recognized in income based on the time factor, the bias of the translative case species, changes in deviation from south to north and from two calculation models, a translation and a transformation. To correct the measured values from the RTX service for a better match to the RIX 95 points calculation models were developed to facilitate the modeling of systematic deviations incurred and meet the demands of real property. Analyzing and examining various relationships have shown that after about 20 minutes of measuring, the precision of the measurements starts to become more stable. Based on the results, the conclusion is that the PPP does not work in real property areas within the core network, however, the method works for forestry and agricultural properties outside the core network. Assuming a modelling through translational alternative transformation, developed in this study is used to adjust the coordinates, the PPP measurement is working in all real property registration measures. This requires that the measurement data is obtained after 20 minutes of measurement or more.
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Balcerak, Jackson Magdalena. "Intentional horizons the mind from an epistemic point of view." Paderborn Mentis, 2009. http://d-nb.info/992825598/04.
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Cevenini, Monica <1986>. "Elastography Point Quantification in the evaluation of liver fibrosis in NAFLD patients." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/10112/1/PHD%20Tesi%20Cevenini.pdf.
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Non-alcoholic fatty liver disease (NAFLD) is the most common cause of chronic liver disease. Several non-invasive approaches to stage liver fibrosis in NAFLD patients are being developed. Elastography Point Quantification (ElastPQ) is a non-invasive method to assess liver fibrosis measuring liver stiffness.
We evaluated the diagnostic performance of ElastPQ for identifying different degrees of fibrosis in NAFLD patients. We compared ElastPQ with other non-invasive tests and identify the best liver stiffness cut offs for every fibrosis stage.
ElastPQ was performed in a training cohort of patients with biopsy-proved NAFLD, liver serum tests and Transient Elastography (TE). The diagnostic performance of ElastPQ was evaluated using AUROC and compared with TE, Fibrosis-4 score, NAFLD fibrosis score and AST/ALT. ElastPQ was performed in a validation cohort in order to validate the data.
106 patients with NAFLD were enrolled. The median stiffness values using ElastPQ was 4.69 kPa (2.82-29.86). The mean liver stiffness divided for category of fibrosis stage were: 4.18 kPa (mild fibrosis F0-1), 4.49 kPa (significant fibrosis F2), 6.89 kPa >(advanced fibrosis F3) and 12.14 kPa (cirrhosis F4). In multivariate analysis, liver stiffness was associated with the fibrosis stage (ß=2.987; p<0.001). The AUCs for the association with significant, advanced fibrosis and cirrhosis were 0.783 (95%IC 0.693-0.857), 0.855 (95%IC 0.773-
0.916) and 0.897 (95%IC 0.822-0.947), respectively. Diagnostic performance of ElastPQ compared to TE, resulted non-inferior in evaluating significant fibrosis (p=0.956), advanced fibrosis (p=0.171) and cirrhosis (p=0.773). ElastPQ had a higher diagnostic performance compared to FIB-4, NFS and AAR. The best fibrosis cuts off identified in the training cohort (80 patients enrolled) were 5.22 kPa, 6.3 kPa and 9.61 kPa respectively for fibrosis >F2, >F3 and F4. ElastPQ is a promising technique for liver fibrosis evaluation
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Luu, Shirley, and Mersiha Selmanovic. "Min själ ville inte använda, men min kropp viker sig själv." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-27031.
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The purpose of this study has been to gain an understanding of how drug addicts get out of an addiction from the perspective of people who have previously been addicted to narcotics. To achieve the purpose of this study we interviewed former addicts and social workers whose work is to help drug addicts. The interviews with the informants have been semi structured where as we had prepared some open questions but also as the interviews went on we thought of follow up questions to ask. The analysis was conducted with three theories: the turning point, natural recovery and social bond. The results show that there are different ways to reach a turning point when you decide to quit the habit and then there are various factors that facilitate a person of getting out of an addiction that also prevent relapse. Furthermore, the results show that their own perspective on what mattered the most during their way out of an addiction was the support of people who had gone through the same process of changing their lifestyle. They found that fellowship is essential to recovery and relapse prevention.
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Persson, Patrik, and Dennis Sjölén. "Lägesosäkerhet vid mätning av dold punkt med totalstation och GNSS." Thesis, Högskolan i Gävle, Samhällsbyggnad, GIS, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27609.
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En dold punkt är en punkt som inte kan mätas direkt utan måste mätas indirekt med hjälp av t.ex. Global Navigation Satellite System (GNSS) eller totalstation. Det finns ett flertal olika metoder med GNSS och totalstation som passar till olika inmätningssituationer för att mäta en dold punkt. Mätning av dolda punkter med totalstation inträffar ofta i industrimiljöer där rör och liknande hänger i vägen för totalstationens siktlinje till mätobjektet. GNSS med nätverks-realtids kinematisk (nätverks-RTK) mätning, en metod som ökar inom mätningsjobb, är en bra metod för att indirekt mäta dolda punkter utomhus där det antingen är dålig mottagning av satellitsignaler eller inte är möjligt att ställa upp en antenn över punkten. Syftet med denna studie är att undersöka hur bra lägesosäkerhet det går att uppnå för mätning av dold punkt med GNSS och totalstation och även jämföra de olika metoderna som testas. Fem olika metoder beskrivs för att kunna bestämma en dold punkts koordinater med totalstation. Bl.a. en med stång och prismor för mätning i plan och höjd, som även kommer användas i denna studie. Lägesosäkerheten 0,1 mm i både plan och höjd bör kunna uppnås med den metoden. Metoder som kan användas med GNSS och nätverks-RTK är t.ex. en rak linje och dess bäring, skärningen av två raka linjer och skärningen av två längdmätningar. Med nätverks-RTK kan mätningar uppnå en lägesosäkerhet på millimeter-nivå baserat på SWEPOS nätverks-RTK-tjänst. Det är även viktigt med tidskorrelation mellan mätningar om de ska göras oberoende av varandra. Resultaten av lägesosäkerheten i denna studie kan sedan jämföras med de från tidigare studier, om liknande värden kan erhållas vid mätning av dold punkt och hur mycket de skiljer sig. Metoden med totalstation som testats i denna studie är en stång med två prismor på som hålls mot den dolda punkten. Prismorna på stången mättes in med totalstationen och med hjälp av punkternas koordinater kan bäringen mellan dem räknas ut, vektorn förlängs till den dolda punkten, och sedan kan den dolda punktens koordinater räknas ut. De metoder som testats med GNSS är beräkning med en rak linje och dess bäring och beräkning med dubbla längdmätningar. För både GNSS och totalstationsmätningarna har minsta kvadratmetoden använts för att beräkna den dolda punkten och dess lägesosäkerhet. Fyra olika varianter av totalstationsmätningarna utfördes. 0,7 m fast anlagd prismastång med manuell inriktning, 1,0 m fast anlagd prismastång med manuell inriktning, 1,0 m fast anlagd prismastång med automatisk inriktning och 1,0 m handhållen prismastång med manuell inriktning. Alla varianter utfördes i två mätningsomgångar. Lägesosäkerheten vid mätningar för en dold punkt med totalstation var i denna studie 1-2 mm i plan och runt 1 mm i höjd, lägst lägesosäkerhet gav manuell inriktning (0,7 m mellan prismorna) med 0,93 mm i plan och 0,79 mm i höjd. Vilken mätningsvariant som var bäst med totalstationsmätningarna varierade mellan mätningsomgångarna, men skillnaden dem emellan var inte så stor. Det är därför svårt att säga säkert vilken variant som ger bäst lägesosäkerhet med det antalet mätningar som utfördes i denna studie. Med GNSS erhölls osäkerheter på som lägst 7,3 mm där dubbla längdmätningar med stativ gav bäst resultat. Om GNSS-mottagaren placerades på ett stativ eller hölls upp med eller utan stödpinnar förändrade inte slutresultatet så mycket, men som väntat gav stativet lägst lägesosäkerhet.<br>A hidden point is a point that can´t be measured directly but must be measured indirectly using, for example, Global Navigation Satellite System (GNSS) or total station. There are several different methods with GNSS and total station that fit into different survey situations to survey a hidden point. Measurement of hidden points with total stations often occurs in industrial environments where pipes and the like hang in the way of the total station's line of sight to the measuring object. GNSS with network-Real-Time Kinematic positioning (network-RTK), a method that increases in measurement jobs, is a great way to indirectly measure hidden points outdoors where either poor reception of satellite signals or the ability to set an antenna over the point is not possible. The purpose of this study is to investigate how good measurement uncertainty it is possible to obtain when measuring hidden points with GNSS and total station and also compare the different methods tested. Five different methods are described to determine the coordinates of a hidden point with a total station. Among other things, one with a bar and prisms for measurements horizontally and in height, which will also be used in this study. Position uncertainty 0.1 mm both horizontally and in height should be achievable with that method. Methods that can be used with GNSS and network RTK are for example straight line and its bearing, the intersection of two straight lines and the intersection of two length measurements. With network RTK, measurements can achieve a position uncertainty in millimeters based on SWEPOS network RTK service. It is also important for time correlation between measurements to be made independently. The results of position uncertainty in this study can then be compared to those of previous studies, if similar values can be obtained when measuring hidden points and how much they differ. The method used for total station in this study is a bar with two prisms on it held against the hidden point. The prisms on the bar were measured with the total station and the bearing between them can be calculated with the help of the coordinates of the points, the vector is extended to the hidden point and then the coordinates of the hidden point can be calculated. The methods tested with GNSS are the calculation of a straight line and its bearing and calculation with double length measurements. For both GNSS and total station measurements, the least squares method has been used to calculate the hidden point and its measurement uncertainty. Four different alternatives of the total station measurements were performed. 0.7 m fixed prism bar with manual alignment, 1.0 m fixed prism bar with manual alignment, 1.0 m fixed prism bar with automatic alignment and 1.0 m hand-held prism bar with manual alignment. All alternatives were performed in two measuring rounds. Measurement uncertainty for measurements for a hidden point with total station in this study was 1-2 mm horizontally and around 1 mm in height, the lowest measurement uncertainty gave manual alignment (0.7 m between the prisms) with 0.93 mm horizontally and 0.79 mm in height. The measuring alternative which was the best with total station measurements varied between the two measuring rounds, but the difference between them was not that large. It is therefore difficult to say which method gives the best measurement uncertainty with the number of measurements performed in this study. GNSS received uncertainties of at lowest 7.3 mm where double length measurements with tripod yielded the best results. If the GNSS receiver was placed on a tripod or held up with or without support did not change the final result that much, but as expected, the tripod provided the lowest measurement uncertainty.
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Bukic, Mia. ""Detta blev min vändpunkt"." Thesis, Malmö högskola, Fakulteten för hälsa och samhälle (HS), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-24643.
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Ungdomsbrottslighet är ett aktuellt problem som finns i Sverige och framställs i media att den ökar, vilket inte stämmer då det finns rapporter och statistik på att det har skett en minskning. Statistik är en viktig del i brottspreventivt syfte eftersom den hjälper forskare få en bild av hur omfattande ungdomsbrottsligheten är, dess utveckling, omfattning, dess minskande och om det förekommer skillnader mellan de olika regionerna i Sverige. ”Detta var min vändpunkt” är en studie vars syfte är att granska varför ungdomar i kriminalitet slutar att begå brott och även undersöka vilka deras vändpunkt/er var utifrån teoretikerna Robert Sampson och John Laubs teori om vändpunkter. Frågeställningarna som uppsatsen behandlat är: vad fick vissa ungdomar att sluta begå brott, finns det vändpunkter för ungdomsbrottslingar samt om någon av dessa vändpunkter var relationer, miljöombyte eller sysselsättning.För att undersöka och besvara dessa frågor har en kvalitativ ansats använts. Tre stycken semistrukturerade intervjuer genomfördes med medlemmar från Unga Kris. Resultatet analyserades och diskuterades utifrån teorin om turning points samt tidigare forskning. Frågeställningarna besvarades och det informanterna uppgav har varit mest betydelsefullt för att avsluta en brottslig karriär är självinsikt, sysselsättning och relationer till nära och kära. Vändpunkter som har varit bidragande faktorer har varit sysselsättning, inre motivation, nära till förlust av närstående vilket ledde till en vilja att förändra sin levnadssituation.<br>Juvenile delinquency is a current problem that exists in the Swedish society which is portrayed as increasing, which is not true since there are reports and statistics that there is a decreasing level of juvenile delinquency .Statistics is an important part of crime prevention because it helps scientists understand the extent of juvenile delinquency, its development, its range, its increase and decrease and whether there are differences between the different regions in Sweden. But who are the young people that represent the statistic and why did they stop commit crime?This was my turning point is a study which aims to examine why young people involved in crime stop committing crimes and also examine their turning point/ s which is based on the theorists Robert Sampson and John Laubs theory of turning points .To examine and answer these questions, a qualitative approach was used. Three semi-structured interviews were conducted with members of the Young Kris. The results were analyzed and discussed based on the theory of turning points and previous research. The informants stated that the meaningful factors that lead to the end of their criminal career were self-perception, occupation and relationships with loved ones. Turning points that have been contributing factors was inner motivation, imprisonment, and loss of relatives, which led to a desire to change their life situation.
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Mitchell, Jeffrey B. "CREATING FLOATING POINT VALUES IN MIL-STD-1750A 32 AND 48 BIT FORMATS: ISSUES AND ALGORITHMS." International Foundation for Telemetering, 1999. http://hdl.handle.net/10150/607271.
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International Telemetering Conference Proceedings / October 25-28, 1999 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>Experimentation with various routines that create floating point values in MIL-STD-1750A 32 and 48 bit formats has uncovered several flaws that result in loss of precision
in approximation and/or incorrect results. This paper will discuss approximation and key
computational conditions in the creation of values in these formats, and will describe
algorithms that create values correctly and to the closest possible approximation. Test
cases for determining behavior of routines of this type will also be supplied.
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Fuentes, Fernández Jorge. "MHD evolution of magnetic null points to static equilibria." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1897.
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In magnetised plasmas, magnetic reconnection is the process of magnetic field merging and recombination through which considerable amounts of magnetic energy may be converted into other forms of energy. Reconnection is a key mechanism for solar flares and coronal mass ejections in the solar atmosphere, it is believed to be an important source of heating of the solar corona, and it plays a major role in the acceleration of particles in the Earth's magnetotail. For reconnection to occur, the magnetic field must, in localised regions, be able to diffuse through the plasma. Ideal locations for diffusion to occur are electric current layers formed from rapidly changing magnetic fields in short space scales. In this thesis we consider the formation and nature of these current layers in magnetised plasmas. The study of current sheets and current layers in two, and more recently, three dimensions, has been a key field of research in the last decades. However, many of these studies do not take plasma pressure effects into consideration, and rather they consider models of current sheets where the magnetic forces sum to zero. More recently, others have started to consider models in which the plasma beta is non-zero, but they simply focus on the actual equilibrium state involving a current layer and do not consider how such an equilibrium may be achieved physically. In particular, they do not allow energy conversion between magnetic and internal energy of the plasma on their way to approaching the final equilibrium. In this thesis, we aim to describe the formation of equilibrium states involving current layers at both two and three dimensional magnetic null points, which are specific locations where the magnetic field vanishes. The different equilibria are obtained through the non-resistive dynamical evolution of perturbed hydromagnetic systems. The dynamic evolution relaxes via viscous damping, resulting in viscous heating. We have run a series of numerical experiments using LARE, a Lagrangian-remap code, that solves the full magnetohydrodynamic (MHD) equations with user controlled viscosity and resistivity. To allow strong current accumulations to be created in a static equilibrium, we set the resistivity to be zero and hence simply reach our equilibria by solving the ideal MHD equations. We first consider the relaxation of simple homogeneous straight magnetic fields embedded in a plasma, and determine the role of the coupling between magnetic and plasma forces, both analytically and numerically. Then, we study the formation of current accumulations at 2D magnetic X-points and at 3D magnetic nulls with spine-aligned and fan-aligned current. At both 2D X-points and 3D nulls with fan-aligned current, the current density becomes singular at the location of the null. It is impossible to be precisely achieve an exact singularity, and instead, we find a gradual continuous increase of the peak current over time, and small, highly localised forces acting to form the singularity. In the 2D case, we give a qualitative description of the field around the magnetic null using a singular function, which is found to vary within the different topological regions of the field. Also, the final equilibrium depends exponentially on the initial plasma pressure. In the 3D spine-aligned experiments, in contrast, the current density is mainly accumulated along and about the spine, but not at the null. In this case, we find that the plasma pressure does not play an important role in the final equilibrium. Our results show that current sheet formation (and presumably reconnection) around magnetic nulls is held back by non-zero plasma betas, although the value of the plasma pressure appears to be much less important for torsional reconnection. In future studies, we may consider a broader family of 3D nulls, comparing the results with the analytical calculations in 2D, and the relaxation of more complex scenarios such as 3D magnetic separators.
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Isaksson, David, and Jonas Fredriksson. "Diametermätning av timmer med stereovision." Thesis, Tekniska Högskolan, Högskolan i Jönköping, JTH, Datateknik och informatik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-41270.
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Syfte – Syftet för den här studien är att utveckla en metod för att mäta diametern på travat timmers ändträytor i en bild med förvridet perspektiv där ytorna befinner sig på olika djup i förhållande till varandra, för att effektivisera mätning inom skogsindustrin. Metod – Denna studie genomfördes i samarbete med Cind AB, och arbetet var uppdelat i två faser med Design Science Research som forskningsmetod. I Fas 1 rektifierades bilder på ändträytorna manuellt och i Fas 2 utnyttjades ett punktmoln för att uppskatta rektifieringsplanet. Detta gjordes i en stereokamerarigg i skala 1:25 på 139 stockar. Samtliga stockar mättes digitalt i de rektifierade bilderna och manuellt med ett digitalt skjutmått. Ett konfidensintervall för differensen beräknades fram för att bedöma mätnoggrannheten. Resultat – Konfidensintervallet för Fas 1 tyder på att metoden har potential då rektifieringsplanet placeras korrekt, vilket Fas 2 visar är en svår och komplex uppgift. Slutsatser – Den utvecklade metodens mätnoggrannhet uppnådde inte studiens mål på 5% felmarginal. Det skulle dock vara möjligt att mäta ändträytor med god noggrannhet om punktmolnet har tillräckligt hög kvalitet. Begränsningar – Mjukvaran som använder punktmolnet för att rektifiera bilderna är en modifierad version av Cinds proprietära produkt. Datamängden som används i studien samlas endast in via Cinds testrigg.<br>Purpose – The purpose of this study is to develop a method for measuring the diameter of piled logs on a truck in a picture that has skewed perspective and where the end surfaces are at different depths in relation to each other. The intent of this method is to further streamline log measurement in the logging industry. Method – This study was conducted in collaboration with Cind AB, and the work was split in two phases with Design Science Research as research method. In Phase 1, images with log end surfaces were rectified manually, and in Phase 2 a point cloud was used to estimate the rectification plane. This was done with a stereo camera rig in scale 1:25 on a total of 139 logs. All logs were digitally measured in the rectified images and manually measured with a digital caliper. A confidence interval for the difference was calculated to assess the measurement accuracy. Findings – The confidence interval from Phase 1 indicates that the developed method has potential when the rectification plane is placed correctly, which Phase 2 shows is a difficult and complex task. Conclusions – The developed method did not reach the desired measurement accuracy of 5% margin of error, which means that the goal of the study was not achieved. It would be possible to measure the end surfaces of logs with high precision if the point cloud is of a sufficiently high quality. Limitations – The software that utilizes point cloud information to rectify the images is a modified version of Cind’s proprietary product. The dataset that is used in this study is collected solely through Cind’s test rig.
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Kornberg, Valentine Philip, and Zaid Alkuheli. "Kontaktlösa betalningar med smarta telefoner." Thesis, KTH, Hälsoinformatik och logistik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296593.
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Företaget Hajenterprise vill göra en forskning inom kommunikation för att hantera kontaktlösa betalningar för att kunna ta betalt kontaktlöst med hjälp av mobilen. Idag används bankkort för att betala för de flesta saker. Nya betalningssätt har rört sig mot kontaktlösa köp med hjälp av smarta telefoner och NFC-teknologier. Smarta telefoner har börjat användas mer och mer i kontaktlösa köp mot point of sale (POS) terminaler. Skulle det då gå att kunna ta bort POS-terminaler och använda smarta telefoner som POS-terminaler? För att besvara detta behövdes tester utföras för att se ifall en smart telefon skulle kunna läsa ett bankkort och behandla bankkortets information. Bankkort kunde läsas av de smarta telefonerna men informationen från bankkortet kunde inte användas av den smarta telefonen för att genomföra en betalning. Detta var eftersom beroende på telefon, öppnades Samsung, Google eller Apple pay. En smart telefon kunde alltså ta emot information från ett bankkort men telefonen kunde inte använda den information för att utföra en betalning på en terminal. Utöver forskningen av olika betalningssätt, skapades en applikation där betalning skulle kunna utföras från en mobil till en annan mobil. Detta skulle ske med hjälp av Near Field Communication (NFC) och blockchain, eftersom Hajenterprise vill ha en prototyp-applikation som skulle kunna betala och ta betalt över NFC mot deras blockchain. JavaScript användes för att skapa en react native applikation som kunde fungera på både Android och iOS. Detta lade grunden så att Hajenterprise kunde använda sitt blockchain-api för mobila betalningar.<br>The company Hajenterprise wanted to research the area of contactless payments to see if it’s possible to Pay contactless with a mobile phone. Today bank cards are used to pay for most things. New payment methods have moved toward contactless purchases using smart phones and NFC-technologies. Smart phones have begun to be used more and more in contactless purchases at point of sale (POS) terminals. The possibility to remove POS-terminals and use smartphones instead as POS-terminals could make it easier and faster to pay. To test this, several tests were needed to see if a smartphone could read a bank card and process the card's information. Bank cards could be read by the smartphone but the information from the bank card could not be used by the smartphone to make a payment. This was because depending on the phone, Samsung, Google or Apple Pay was opened. Thus, a smart phone could receive information from a card but the phone could not use that information to make a payment at a terminal. In addition, an application was created where one could make payments from one mobile to another mobile. This would be done using Near Field Communication (NFC) and blockchain, as Hajenterprise wanted a prototype-application that could pay and charge over NFC against their blockchain. JavaScript was used to create a react native application that could work on both Android and iOS. This laid the foundation for Hajenterprise to use its blockchain API for mobile payments.
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Svensson, Fredrik, and Sebastian Wåhlstedt. "Metodutveckling av Additivt Tillverkade (AT) produkter med efterbearbetning i CNC styrda maskiner med enkel identifiering av nollpunkt." Thesis, Örebro universitet, Institutionen för naturvetenskap och teknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-51789.
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Detta examensarbete har utförts i Karlskoga på två företag, Lasertech LSH AB och PartnerTech Karlskoga AB, där uppdraget bestod i att med en metodutveckling hitta ett generellt angreppssätt som man kan förhålla sig till för att förenkla efterbearbetningen av en additivt tillverkad (AT) detalj. Fortsättningsvis kommer additiv tillverkning att benämnas AT i texten. Svårigheten ligger i att spänna upp och mäta in en detalj i en CNC-maskin som nästan är färdig och saknar självklara inmätning- och inspänningsytor. Syftet med arbetet var att hitta en generell metod att använda sig av för att lösa dessa svårigheter vilket leder till en säkrare och effektivare tillverkning. Parallellt med problemlösningen gjordes även en fallstudie där bägge företagen har en AT produkt som ska bearbetas i CNC-maskin. Problemen klargjordes med hjälp av ett funktionsmedelträd och lösningar togs fram med hjälp av konceptgenerering för att få fram så många och bra lösningar som möjligt. Genom att ta fram dessa koncept och möjligheten att kombinera dessa med varandra skapades en metod som löser inmätning- och inspänningsproblemen och visade sig vara användbar i fallstudien. Dessa koncept ses som en generell och bra lösning på ovanstående problem. Fortsatt arbete och utbildning kommer att krävas för att ytterligare testa metoderna och ge ökad kunskap om AT för att underlätta tillverkningsprocessen.<br>This thesis has been carried out in Karlskoga at the two companies, Lasertech LSH AB and PartnerTech Karlskoga AB, where the assignment consisted of using a methodological development to find a general approach that can be used to simplify the processing of an additive manufactured (AM) part. The challenge is to rig and calibrate a detail in a CNC machine that is nearly finished that lacks obvious faces to rig and calibrate the part in the machine. The aim of the work is to find a general method that can be used to resolve these difficulties, leading to a safer and more efficient manufacturing. Parallel to the solution of the problem, a case study will also be done where both companies have a product that will be additive manufactured (AM) and processed in the CNC machine. The problems were clarified by using a functional-medium-trees (funktionsmedelträd) and solutions were developed using the concept generation to get as many good solutions as possible. By developing these concepts and the ability to combine these with each other a method that solves the problems with the rigging and calibration was created and proved to be useful in the case study. We see these concepts as general and a good solutions to the problems above. Further work and training will be required to further test the methods and increase knowledge about AM production to facilitate the manufacturing process.
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Cox, Christine. "Effects of Perspective Taking on Memory for Self and Other." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195562.
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Recent functional neuroimaging evidence suggests that recalling autobiographical memories, imagining fictitious autobiographical episodes, and taking the perspective of another person activate a similar network of brain regions. Results from the two studies presented here provide further evidence of this common neural network. Previous evidence also suggests that recalling autobiographical memories from a first person or from a third person perspective can influence the way in which those memories are experienced as well as the brain regions that are engaged; however, the effect of perspective on imagining autobiographical events remains unclear. Results from Study 1 indicated that brain regions implicated in both remembering and imagining were differentially engaged during these tasks depending on whether a first person or a third person perspective was taken. In addition, while recalling autobiographical memories from a third person perspective can result in the feeling that a past self is more like another person, imagining oneself in the position of another person can result in the feeling that that person is more similar to oneself; this suggests a possible link between perspective in memory and social perspective taking. In Study 2, we identified several brain regions exhibiting a pattern of increasing or decreasing activation as a function of whether socially interactive events were recalled from a first person perspective, by imagining oneself as one's partner, or from a third person perspective (i.e., as a function of distance from one's own perspective). Together, our findings suggest that perspective plays an important role in the way in which brain regions that are part of this common neural network are engaged during memory, imagination, and socially interactive tasks.
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Elmesten, Joel. "Automatiskt genererade dataset med SfM : En undersökning av SfM och dess egenskaper." Thesis, Mittuniversitetet, Institutionen för informationssystem och –teknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-42400.
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Fler och fler industrier vänder blickarna mot A.I. (artificiell intelligens) för att undersöka om och hur det kan användas för att effektivisera olika processer. Men för att träna upp en A.I. krävs oftast stora mängder data där man kan behöva förbereda väldigt mycket manuellt innan man ens kan påbörja träningsprocessen. SCA Skog AB ser dock många fördelar med att göra A.I. till en naturlig del av sin digitaliseringsprocess, där man bland annat är intresserad utav visuella bedömningar av träd. Dataset för visuella bedömningar kan se ut på olika sätt, men i detta fall var det relevant att skapa dataset i form av konturer för trädstammar. Med hjälp av en A.I. som skulle kunna visuellt segmentera och klassificera träd så skulle man öppna upp för många nya möjligheter inom skogsindustrin. Under detta projekt har jag undersökt hur man skulle kunna automatisera processen för skapandet av dataset i skogsmiljöer för just visuella bedömningar. Som ett resultat av att försöka uppnå detta, så fick jag experimentera med bildbaserade punktmoln som på olika sätt tillät projektet att avancera framåt. Ur dessa punktmoln kunde jag sedan segmentera träden för att i nästa process skapa konturer längs alla träd med hjälp av utvunnen data ur segmenteringen. Jag tittade först och främst på hur man automatiskt skulle kunna skapa konturer för alla träd i bildsekvensen, för att sedan låta en användare gå in och finjustera konturerna. I resultatet kan man sedan tydligt se skillnaden i tidsåtgång för att använda programmet och inte. Programmet kan skapa och uppdatera pixel-masker snabbare än vad jag manuellt kunde utföra samma arbete, där jag dock hade önskat på en mer markant skillnad i tidsåtgång jämfört med den rent manuella insatsen. Under projektets gång så kunde jag identifiera några större problem som förhindrade detta, där man med lämplig utrustning skulle kunna uppnå ett mycket bättre resultat än vad som gjordes under detta projekt. Resultaten talar ändå för att det kan vara lönt att undersöka metoden mer ingående.<br>More and more industries are turning their eyes towards A.I. (artificial intelligence) and its rapid development, in hope of utilizing it to remove labor intense operations. But large amounts of manually processed data is often required before starting the learning process, which can be a huge problem to deal with. SCA Skog AB is still very curious in how they could use A.I. in forestry, where visual inspection of trees is of particular interest. There are many visual problems that modern A.I. can solve, where in this case it’s a matter of finding contours of trees and classify them. If this would be possible, a lot of interesting opportunities would open up to be experimented with. During this project I’ve examined the possibility of reducing the time it takes to manually create datasets of forest environments for this particular visual problem. As a result of trying to achieve this, I had to examine image-based point clouds and their properties to find out how they could be used in this process. From the SfM-point cloud I was able to segment all visible trees with an segmentation algorithm and isolate these points to extract the 2D→3Dconnection. I could then use that connection to create pixel masks and apply it to the image sequence to paint out all the contours of the segmented trees. A method to automatically update these pixel masks in terms of adding and removal was also implemented, where any update would propagate through the image sequence and reduce the time for manual adjustment. From testing the program, it’s clear that time could be saved doing various kinds of contour updating-operations. The program could by itself create pixel masks that then could be updated in a way that a lot of need for manual updating was reduced, though the result in terms of time saved was not as substantial as one would have hoped for. Issues with the point cloud caused some major problems due to it’s low precision. Using better equipment for image gathering would most likely be the best way to improve the results of this project. The result still tells us that this method is worth researching further.
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Elmesten, Jonas. "Automatiskt genererade dataset med SfM : En undersökning av SfM och dess egenskaper." Thesis, Mittuniversitetet, Institutionen för informationssystem och –teknologi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-42400.
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Fler och fler industrier vänder blickarna mot A.I. (artificiell intelligens) för att undersöka om och hur det kan användas för att effektivisera olika processer. Men för att träna upp en A.I. krävs oftast stora mängder data där man kan behöva förbereda väldigt mycket manuellt innan man ens kan påbörja träningsprocessen. SCA Skog AB ser dock många fördelar med att göra A.I. till en naturlig del av sin digitaliseringsprocess, där man bland annat är intresserad utav visuella bedömningar av träd. Dataset för visuella bedömningar kan se ut på olika sätt, men i detta fall var det relevant att skapa dataset i form av konturer för trädstammar. Med hjälp av en A.I. som skulle kunna visuellt segmentera och klassificera träd så skulle man öppna upp för många nya möjligheter inom skogsindustrin. Under detta projekt har jag undersökt hur man skulle kunna automatisera processen för skapandet av dataset i skogsmiljöer för just visuella bedömningar. Som ett resultat av att försöka uppnå detta, så fick jag experimentera med bildbaserade punktmoln som på olika sätt tillät projektet att avancera framåt. Ur dessa punktmoln kunde jag sedan segmentera träden för att i nästa process skapa konturer längs alla träd med hjälp av utvunnen data ur segmenteringen. Jag tittade först och främst på hur man automatiskt skulle kunna skapa konturer för alla träd i bildsekvensen, för att sedan låta en användare gå in och finjustera konturerna. I resultatet kan man sedan tydligt se skillnaden i tidsåtgång för att använda programmet och inte. Programmet kan skapa och uppdatera pixel-masker snabbare än vad jag manuellt kunde utföra samma arbete, där jag dock hade önskat på en mer markant skillnad i tidsåtgång jämfört med den rent manuella insatsen. Under projektets gång så kunde jag identifiera några större problem som förhindrade detta, där man med lämplig utrustning skulle kunna uppnå ett mycket bättre resultat än vad som gjordes under detta projekt. Resultaten talar ändå för att det kan vara lönt att undersöka metoden mer ingående.<br>More and more industries are turning their eyes towards A.I. (artificial intelligence) and its rapid development, in hope of utilizing it to remove labor intense operations. But large amounts of manually processed data is often required before starting the learning process, which can be a huge problem to deal with. SCA Skog AB is still very curious in how they could use A.I. in forestry, where visual inspection of trees is of particular interest. There are many visual problems that modern A.I. can solve, where in this case it’s a matter of finding contours of trees and classify them. If this would be possible, a lot of interesting opportunities would open up to be experimented with. During this project I’ve examined the possibility of reducing the time it takes to manually create datasets of forest environments for this particular visual problem. As a result of trying to achieve this, I had to examine image-based point clouds and their properties to find out how they could be used in this process. From the SfM-point cloud I was able to segment all visible trees with an segmentation algorithm and isolate these points to extract the 2D→3Dconnection. I could then use that connection to create pixel masks and apply it to the image sequence to paint out all the contours of the segmented trees. A method to automatically update these pixel masks in terms of adding and removal was also implemented, where any update would propagate through the image sequence and reduce the time for manual adjustment. From testing the program, it’s clear that time could be saved doing various kinds of contour updating-operations. The program could by itself create pixel masks that then could be updated in a way that a lot of need for manual updating was reduced, though the result in terms of time saved was not as substantial as one would have hoped for. Issues with the point cloud caused some major problems due to it’s low precision. Using better equipment for image gathering would most likely be the best way to improve the results of this project. The result still tells us that this method is worth researching further.
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Chen, Xianjin. "Analysis and computation of multiple unstable solutions to nonlinear elliptic systems." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2990.
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Jambon, Francis. "Erreurs et interruptions du point de vue de l'ingénierie de l'interaction homme-machine." Phd thesis, Université Joseph Fourier (Grenoble), 1996. http://tel.archives-ouvertes.fr/tel-00004996.
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Les erreurs humaines et les interruptions sont des phénomènes courants mais négligés, voire ignorés, dans le processus de développement des systèmes interactifs. En outre, leur automatisation massive n'a pas éliminé erreurs et interruptions, mais en a accentué le caractère critique. Ce mémoire a pour objet l'amélioration de la fiabilité des systèmes homme-machine par la prise en compte explicite des erreurs et des interruptions dans la pratique de l'Ingénierie de l'Interaction Homme-Machine. Nous appliquons notre étude au cas exigeant des systèmes critiques automatisés et notamment aux systèmes aéronautiques, pour lesquels les erreurs humaines et les interruptions ont une importance décisive. Dans la première partie du mémoire, dédiée aux concepts, nous présentons une revue des recherches sur l'automatisation et sur l'analyse des erreurs humaines telle que l'envisage la psychologie cognitive. A notre tour, nous proposons le concept de singularité comme notion pivot aux phénomènes d'erreur et d'interruption. Nous en fournissons un modèle qui explicite les activités mentales en relation avec la détection et la correction de singularité. La seconde partie du mémoire a trait à l'expression formelle des singularités dans le processus de développement d'un système interactif. Après une revue des formalismes et des notations utilisés en Interaction Homme-Machine, nous retenons MAD, UAN et les réseaux de Petri pour leurs qualités et leur usage complémentaires. Pour chacun, nous proposons les extensions nécessaires à l'expression des singularités. Nous fournissons également les règles de traduction de ces extensions entre les trois formalismes retenus, évitant ainsi la perte de conformité au cours du processus de développement d'un système.
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Idlas, Sandrine. "Bachelard: l’objectivité scientifique d’un point de vue constructiviste, entre imagination et raison." Thesis, Södertörns högskola, Institutionen för kultur och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-14988.
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In Sweden, Bachelard is mostly known for his works about poetry and literature, but he was also very productive in philosophy of science. Having studied engineering and taught physical sciences, his main writings in this field concern contemporary physics. He developed the idea of “epistemological rupture”, closely linked to the concept of “epistemological obstacle”. Those notions show science in its historicity and are linked to the idea of progress: a progress that strives not only towards a better approximation of reality, but that can also be seen as a progress of the scientific mind itself. Epistemological ruptures take place when epistemological obstacles are defeated. It is when an epistemological obstacle is met that the ways of thinking that prevents progress become visible; it needs to become an obstacle before we can get rid of it, which causes not only a more precise knowledge, but also a restructuration of the scientific mind. This way, epistemological rupture do not only refer to a historical process, but also to a psychological one. In The formation of the scientific mind, Bachelard shows, through examples taken from history of science, the path that each “scientific mind” has to travel. He analyses science with the aim of finding in its history a history of thought and of its progress: therefore, in The formation of the scientific mind, he gives the same status to the errors of the high school students, as to the ways of thinking that have impeded or slowed down sciences’ developments. By stressing the importance of history, Bachelard insists on the psychological aspects of the constitution of science: as much as it is absurd to try to understand an answer without knowing the question it replies to, it is not possible to cut knowledge from its context of emergence, or to understand an object of study without referring to the subject that constituted it. Thus, Bachelard emphasises the importance of the subject in science, but without making of science something subjective, or without falling into psychologism. The reference to the scientists’ subjectivity is not, for Bachelard, a way of questioning the validity of the scientific discourse; on the contrary, it is by describing science in terms of the scientist’s mind and psychology that Bachelard will find the grounds for science’s objectivity and its success. Bachelard shows science as a practice, as a training of the mind, as an effort involving a lot more than mere rationality, thereby destroying the myth of a universal reason as an underlying principle in the construction of science.<br>En Suède, Bachelard est surtout connu pour ses travaux sur la poésie et la littérature, mais il a été tout aussi productif en épistémologie. Ayant étudié et enseigné les sciences physiques, ses principaux écrits dans ce domaine concernent la physique contemporaine. Il a développé le concept de « rupture épistémologique », lié à celui d’ « obstacle épistémologique ». La notion d’obstacle épistémologique montre la science dans son historicité ; elle est liée à l’idée de progrès : un progrès qui recherche non seulement une meilleure approximation de la réalité, mais qui peut aussi être compris comme un progrès de l’esprit scientifique lui-même. Ce progrès est accompli lors de ruptures épistémologiques, c’est-à-dire lorsqu’un obstacle épistémologique est vaincu : c’est à ce moment que ce qui empêche la pensée d’avancer devient visible, ce qui cause non seulement une connaissance plus précise, mais aussi une restructuration de l’esprit scientifique. De cette manière, le concept de rupture épistémologique ne réfère pas seulement à un processus historique, mais aussi à un processus psychologique. Dans La formation de l’esprit scientifique, Bachelard donne des exemples pris de l’histoire des sciences et montre, à travers elles, le cheminement que chaque « esprit scientifique » doit accomplir. Il analyse la science avec le but de trouver dans son histoire, une histoire de la pensée et de ses progrès : c’est pour cela que Bachelard, dans son livre La formation de l’esprit scientifique, compare le développement des sciences au niveau historique avec l’apprentissage des sciences au niveau individuel, et fait souvent référence aux erreurs des lycéens autant qu’aux bévues historiques. Ainsi, Bachelard met en lumière l’aspect construit des sciences : pour autant qu’il soit absurde d’essayer de comprendre une réponse sans connaître la question à laquelle celle-ci répond, il est impossible de couper la connaissance de son contexte d’émergence, ou d’essayer de comprendre un objet d’étude sans référer au sujet qui l’a constitué. Il ne s’agit pas pour autant faire de la science quelque chose de subjectif ou de tomber dans le psychologisme. La référence à l’esprit du savant ou à l’intersubjectivité scientifique n’est pas, pour Bachelard, un moyen de questionner la validité du discours scientifique ; au contraire, c’est en décrivant la science grâce à la psychologie du savant que Bachelard montre la science comme une pratique, comme un entrainement de l’esprit, comme un effort impliquant bien plus que la simple rationalité, détruisant de ce fait le mythe d’une raison universelle comme principe sous-jacent de la construction des sciences.
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Ekelund, Hugo, and Joakim Gustavar. "Lutning och Buktningskontroll av horisontell yta med geodetiska mätinstrument." Thesis, Högskolan i Gävle, Samhällsbyggnad, GIS, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-25376.
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Utförande av kontroller av olika objekt i byggskedet är av stor betydelse för att undvika onödiga kostnader och förseningar. Betonggolv är en typ av objekt som har toleranskrav avseende lutning och buktighet. I Sverige gäller det svenska referensverket AMA-Hus, där anges toleranser för lutning och buktighet. Buktighet kontrolleras för två olika diametrar på 0,25 m respektive 2 m, i den här studien benämnda som lokal och global buktighet.Avsikten med studien var att identifiera det optimala tillvägagånssättet att kontrollera lutning och buktighet av en horisontell yta samt infallsvinkelns påverkan vid reflektorlösa mätningar. Rutnätsskanning med olika punktavstånd utförd med multistation och laserskanning från multistation och laserskanner har använts för att samla in data. Före mätning placerades konstgjorda upphöjda buktningar ut på golvet. Data från mätningarna interpolerades i Surfer-mjukvara, där kartor med höjdkurvor skapades. Interpolationsmetoden som användes var Kriging. Även ett program för objektiv kontroll av buktighet utvecklades i samarbete med en civilingenjör i datateknik.Vid analys konstaterades det att rutnätsskanningarna med punktavstånden över 12,5 cm ej anses lämpliga för kontroll av buktighet. Rutnätsskanningen med punktavstånd på 12,5 cm eller tätare kan inte heller anses optimal för kontroll av buktighet då tidsåtgången blir för omfattande. Laserskanning med multistationen är det tillvägagångsätt som utifrån resultatet i denna studie, baserat på kontrollbarhet av buktighet och lutning, ger tydligast resultat i förhållande till tidsåtgång.Högre infallsvinkel från mätningar längre bort från instrumentet visade ingen systematisk inverkan på mätningarna i denna studie. Den ökade punkttätheten som påvisats nära instrumentet orsakade något som tolkats som brus i punktmolnet och förhöjd tidsåtgång för utförande av mätningar.<br>Performing controls of different types of objects in the construction phase of buildings are of great importance to avoid unnecessary costs and delays. Concrete floors are one type of object that has defined tolerances regarding levelness and flatness. In Sweden, the tolerance for levelness and flatness can be found in the national guideline AMA-Hus. Flatness is controlled within two different diameters of 0.25 m and 2 m respectively, in this study referred to as local and global flatness.The aim of this study was to identify the optimal method to control levelness and flatness of a horizontal surface and to determine the effect from the angle of incidence using reflectorless measurements. Grid scanning with different point density performed with a multi station and laser scans from multi station and laser scanner were used to collect the data. Before measurements artificial elevated curvatures where placed on the concrete floor. Data from the measurements where interpolated in Surfer software, and height maps were created. The interpolation method used was Kriging. Software containing an algorithm for objective flatness detection was developed in cooperation with a civil engineer in computer science.Analysis of the grid scanning data revealed that point density over 12.5 cm is not sufficient to detect significant elevation differences when controlling flatness. Grid scanning at 12.5 cm or thicker also cannot be deemed optimal since the time required to perform the measurements are disproportionately long. Laser scanning using the multi station proved, in the conditions of this study, to be the optimal method for levelness and flatness control in respect to time consumption.Steeper angle of incidence from measurements further from the instrument showed no systematical deviations of the measurements in this study. However, the increased point density found close to the instrument caused something that could be considered as noise in the point cloud as well as increased time consumption.
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Karlsson, Linnea, and Aleksandra Banda. "Avtalstolkning i det digitala samhället med fokus på konsumentförhållanden." Thesis, Karlstads universitet, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-73003.
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I det digitala samhället pågår en ständig utveckling, och konsumenter ingår mer och mer avtal på internet. Lagen (1915:218) om avtal och andra rättshandlingar på förmögenhetsrättens område, (fortsättningsvis, avtalslagen eller AvtL) tilkom för mer än 100 år sedan. Det traditionella sättet att ingå avtal mellan avtalsparterna är i pappersform genom att ena parten lämnar ett anbud som följer av en accept av motparten. Idag har utvecklingen gått framåt och det är idag vanligare att konsumenter ingår avtal på internet genom att acceptera avtalsvillkor som är utformade som standardavtal. Anledningen till det är att standardiserade avtal gör det möjligt för näringsidkaren att nå ut till en större kundkrets och således inte behöver upprätta individuella avtal i varje avtalsförhållande. Det är därför förmånligt att tillämpa standardavtal mellan näringsidkare och konsument. Konsumenter accepterar och ingår dagligen avtal på internet genom att godkänna avtalsvillkor eller användarvillkor för att få tillgång till en hemsida, det sker främst genom clickwrap-avtal.1 En konsument kan även bli bunden av ett avtal utan att acceptera avtalsvillkor genom, s.k browsewrap-avtal. 2Det är vanligt att konsumenter godkänner villkor på internet utan vetskap om att de har ingått ett avtal. Konsumenter binder sig till avtal på internet genom ett enkelt knapptryck eller genom att enbart besöka hemsidan. Om villkoren som konsumenter accepterar anses oskäliga finns det möjlighet att tillämpa det tvingande ogiltighetsreglerna i avtalslagen för att jämka eller ogiltighetsförklara hela eller delar av avtalet. I uppsatsen analyseras frågan i vilka fall en konsument anses juridisk bunden av ett avtal på internet samt hur domstolen bör gå tillväga vid tolkning av elektroniska avtal med hjälp av avtalsrättsliga tolkningsprinciper. Slutligen analyseras vilka ogiltighetsgrunder i avtalslagen som kan tillämpas på elektroniska avtal som bedöms oskäliga. För att undersöka vilka avtal eller avtalsvillkor som kan bedömas oskäliga gentemot konsumenten tillämpas även lagen om avtal och andra rättshandlingar på förmögenhetsrättens område (1915:218) (AVLK) samt lagen (2005:59) om distansavtal och avtal utanför affärslokaler (distansavtalslagen eller DAvtL). Uppsatsen avslutas med en slutsats kring våra egna reflektioner på området där vi kommer fram till att det inte finns ett entydigt svar kring vilka avtalsrättsliga bestämmelser och principer som är tillämpbara på elektroniska avtal. Det har lett till att dagens digitala samhälle har skapat ett behov av en förnyad avtalslag som är mer anpassad för avtal som ingås på internet.
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Senanayake, Tissa. "The influence of Hall currents, plasma viscosity and electron inertia on magnetic reconnection solutions." The University of Waikato, 2007. http://hdl.handle.net/10289/2593.
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Abstract This thesis examines magnetic reconnection in the solar corona. Magnetic reconnection is the only mechanism which allows the magnetic topology of magnetized plasmas to be changed. Many of the dynamic processes in the Sun's atmosphere are believed to be driven by magnetic reconnection and studying the behaviour of such phenomena is a key step to understanding the reconnection mechanism. In Chapters 1 to 3, we discuss the physical and mathematical framework on which current magnetohydrodynamic reconnection models are based. The aim of the thesis is to investigate theoretical models of magnetic reconnection using variety of analytic and numerical techniques within the theoretical frame work of magnetohydrodynamics (MHD). In Chapter 4 we use a line-tied X-point collapse model for compressible plasmas to investigate the role of viscosity on the energy release mechanism. This model also provides the basis for the investigation of Chapter 5 which explores the impact of Hall currents in the transient X-point energy dissipation. Chapter 6 is concerned with how reconnection is modified in the presence of generalized Ohm's law which includes both Hall current and electron inertia contributions. In contrast to the closed X-point collapse geometry adopted for compressible plasmas previously, we find it more convenient to explore this problem using an open incompressible geometry in which plasma is continually entering and exiting the reconnection region. Specially, we find the scaling of the Hall-MHD system size analytically, rather than numerically as in the X-point problem of Chapter 5. Chapter 7 summarizes the results of investigations in Chapters 4, 5 and 6.
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SALVO, F. DI. "VARIAZIONE SPAZIALE DEL RISCHIO RELATIVO DI MORTE PER TUMORE DEL SISTEMA EMOLINFOPOIETICO, IN UN¿AREA PROSSIMA AD UNA RAFFINERIA PETROLIFERA." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/232971.
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Kernel smoothing is a popular approach to estimating relative risk surface from data in the location of cases and controls in geographical epidemiology. To date, the use of a fixed smoothing parameter has dominated in literature, but it can perform poorly with highly heterogeneous population. A more intuitive approach is to utilize a spatially adaptive, variable smoothing parameter where the amount of smoothing depends inversely on the local amount of data. The interpretation of such surfaces is facilitated by plotting of tolerance contours which highlight areas where the risk is sufficiently high to reject the null hypothesis of unit relative risk. This approach has been applied to a epidemiological survey about the risk of death in the area surrounding an Italian petrochemical refinery where 172 deaths and 337 controls has been identified. Maps of the spatial variation of relative risk and tolerance contours have be produced. Only for women and those spending most of their time at home, we found a sub-region of elevated risk highlighted by plotted tolerance contours.
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Andersson, David. "From the Electronic Structure of Point Defects to Functional Properties of Metals and Ceramics." Doctoral thesis, Stockholm : Materialvetenskap, Materials Science and Engineering, KTH, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4309.
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Örtlund, Marc, and Johan Fransson. "Att lämna alkoholen bakom sig : En kvalitativ studie om vägen till nykterhet med fokus på motivation och vändpunkter." Thesis, Karlstads universitet, Fakulteten för humaniora och samhällsvetenskap (from 2013), 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-40377.
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Syftet med den här studien är att genom en kvalitativ intervjustudie undersöka vilken typ av motivation samt, i den mån de existerar, vändpunkter som lett till att individer har tagit sig ur ett alkoholmissbruk. Studien har utförts genom sex intervjuer med privatpersoner som har levt med alkoholmissbruk och via behandling fått hjälp att ta sig ur sagda missbruk. Intervjuerna bokades med hjälp av socialtjänsten i en mellansvensk kommun där samtliga respondenter har utfört sin behandling. Vi har tolkat vår empiri genom stämplingsteori och defining moments. Resultatet presenterar teman som belyser likheter i respondenternas upplevelser. Resultatet påvisar att individer behöver få en insikt om sitt missbruk för att behandling ska kunna ha en positiv påverkan. Denna insikt införskaffas genom olika processer eller fysiska skador som påverkat respondenterna liv. Även motivation från individen själv och det privata nätverket påverkar möjligheterna att ta sig ur ett alkoholmissbruk. Respondenterna ansåg att behovet av behandling är nyckeln för att bli fri från alkoholmissbruk då de ansåg att de inte hade kunskap eller möjlighet för att göra det själva. Detta är något som stärks av tidigare forskning inom området.<br>The purpose of this study is that through a qualitative interview study investigating what kind of motivation and, to the extent they exist, turning points that led individuals to emerged from an alcohol addiction. The study was conducted through six interviews with individuals who have been living with alcohol abuse and through the treatment received help to get out of said abuse. The interviews was booked with the help of the social services in a Swedish municipality where all respondents have completed their treatment. We have interpreted our empiricism by labeling theory and defining moments. The result presents themes that highlight the similarities in the respondents' experiences. The result demonstrates that individuals need to get an insight into his addiction to treatment will have a positive impact. This insight is acquired through various processes or physical damage that affected respondents lives. The motivation of the individual and the private network allso affects the ability to get out of an alcohol abuse. Respondents felt that the need for treatment is the key to freedom from alcohol abuse when they felt that they did not have the knowledge or the ability to do it themselves. This is something that is supported by previous research in the area.
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Vu, Duc Thach Son. "Numerical resolution of algebraic systems with complementarity conditions : Application to the thermodynamics of compositional multiphase mixtures." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASG006.
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Dans les simulateurs de réservoir, la prise en compte des lois d’équilibre thermodynamique pour les mélanges polyphasiques d'hydrocarbures est une partie délicate. La difficulté réside dans la gestion de l'apparition et de la disparition des phases pour différents constituants. L'approche dynamique traditionnelle, dite de variable switching, consiste à ne garder que les inconnues des phases présentes et les équations relatives à celles-ci. Elle est lourde et coûteuse, dans la mesure où le « switching » se produit constamment, même d'une itération de Newton à l'autre.Une approche alternative, appelée formulation unifiée, permet de maintenir au cours des calculs un jeu fixe d'inconnues et d'équations. Sur le plan théorique, c'est un progrès important. Sur le plan pratique, comme la nouvelle formulation fait intervenir des équations de complémentarité qui sont non-lisses, on est obligé après discrétisation d'avoir recours à la méthode semi-lisse Newton-min, au comportement souvent pathologique.Pour aller au bout de l’intérêt de la démarche unifiée, cette thèse a pour objectif de lever cet obstacle numérique en élaborant des algorithmes de résolution mieux adaptés, avec une meilleure convergence. Notre méthodologie consiste à s’inspirer des méthodes qui ont fait leur preuve en optimisation sous contraintes et à les transposer aux systèmes généraux. Cela conduit aux méthodes de points intérieurs, dont nous proposons une version non-paramétrique appelée NPIPM, avec des résultats supérieurs à Newton-min.Une autre contribution de ce travail doctoral est la compréhension et la résolution (partielle) d’une autre obstruction au bon fonctionnement de la formulation unifiée, jusque-là non identifiée dans la littérature. Il s’agit de la limitation du domaine de définition des fonctions de Gibbs associées aux lois d’état cubiques. Pour remédier à l’éventuelle non-existence de solution du système, nous préconisons un prolongement naturel des fonctions de Gibbs<br>In reservoir simulators, it is usually delicate to take into account the laws of thermodynamic equilibrium for multiphase hydrocarbon mixtures. The difficulty lies in handling the appearance and disappearance of phases for different species. The traditional dynamic approach, known as variable switching, consists in considering only the unknowns and equations of the present phases. It is cumbersome and costly, insofar as "switching" occurs constantly, even from one Newton iteration to another.An alternative approach, called unified formulation, allows a fixed set of unknowns and equations to be maintained during the calculations. From a theoretical point of view, this is an major advance. On the practical level, because of the nonsmoothness of the complementarity equations involved in the new formulation, the discretized equations have to be solved by the semi-smooth Newton-min method, whose behavior is often pathological.In order to fully exploit the interest of the unified approach, this thesis aims at circumventing this numerical obstacle by means of more robust resolution algorithms, with a better convergence. To this end, we draw inspiration from the methods that have proven their worth in constrained optimization and we try to transpose them to general systems. This gives rise to interior-point methods, of which we propose a nonparametric version called NPIPM. The results appear to be superior to those of Newton-min.Another contribution of this doctoral work is the understanding and (partial) resolution of another obstruction to the proper functioning of the unified formulation, hitherto unidentified in the literature. This is the limitation of the domain of definition of Gibbs' functions associated with cubic equations of state. To remedy the possible non-existence of a system solution, we advocate a natural extension of Gibbs' functions
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Cheever, Kelly Martell. "The Effect of Chronic Mild to Moderate Neck Pain on Neck Function as Measured by Joint Reposition Error and Tactile Acuity of the Cervical Dermatomes." BYU ScholarsArchive, 2014. https://scholarsarchive.byu.edu/etd/4142.
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The purpose of this study was to observe the joint reposition error and tactile acuity of patients with chronic mild to moderate neck pain and compare those values to healthy controls to further investigate the effect of neck pain on neck function and the need for sensorimotor training in patients with chronic neck pain. In spite of some inconsistencies in the literature and methodology, both the two-point discrimination test and the joint reposition error test can give clinicians valuable, inexpensive and quick objective data that can be used in the diagnostic portion of an examination as well as in designing and assessing change during a rehabilitation program. This study found a significant increase in neck joint reposition error (JRE) in flexion in participants suffering from neck pain when compared to healthy controls. JRE averaged 2.75° ± 1.52° in flexion healthy controls and 4.53° ± 1.74° in flexion in participants with chronic neck pain. Additionally, the dermatome found to be most affected by neck pain was C5. Further research is needed to examine both the effect of proprioceptive training on neck pain and the effectiveness of the two-point discrimination threshold test and the joint reposition error test as diagnostic tools and indicators of progress in the treatment of chronic neck pain.
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Larsson, Alexander, and Olle Oscarsson. "Trädhöjdsbestämning med UAV-fotogrammetri och UAV-laserskanning : En jämförande studie för detektering av riskträd." Thesis, Högskolan i Gävle, Samhällsbyggnad, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-32699.
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UAV (Unmanned Aerial Vehicle) eller drönare används för insamling av geografisk data och fotografering av såväl företag, myndigheter och privatpersoner. Tekniken förenklar insamling av data över stora geografiska områden och kan utnyttjas för kartering, modellering och analysering som volymbestämning. Studien genomfördes med syftet att detektera trädhöjder ur punktmoln genererade med laserskanning och digital fotogrammetri från luften. Vidare undersöktes det vilken metod som gav det mest tillförlitliga resultatet samt om teknikerna var applicerbara för detektering av riskträd. Riskträd innebär i denna studie träd som utgör ett potentiellt hot mot viktig infrastruktur som till exempel kraftledningar. Numera sker datainsamlingen primärt via helikopter för identifiering av sådana träd. Genom att använda olika drönartekniker för datainsamlingen kan kostnaderna reduceras. Insamlingen av data genomfördes över ett glest barrskogsområde i Rörberg strax utanför Gävle. Laserdata samlades in med en LiDAR (Light Detection and Ranging)-sensor från YellowScan monterad på en Geodrone X4L Professional-drönare och de fotogrammetriska data med en drönare av typen DJI Phantom 4 RTK (Real Time Kinematic) med standardkamera. För bägge insamlingarna georefererades insamlade data direkt genom enkelstations-RTK för laserskanningen och med SWEPOS Nätverks-RTK för den fotogrammetriska flygningen. För att kontrollera kvaliteten av insamlade data mättes sex stycken kontrollprofiler in med totalstation i skogspartiet. Dessa jämfördes sedan mot de skapade punktmolnen. Medelavvikelsen och standardavvikelsen mellan LiDAR och kontrollprofilerna fastställdes till -0,038 m och 0,049 m. För fotogrammetrin och kontrollprofilerna bestämdes medelavvikelsen till +0,060 m och standardavvikelsen 0,090 m. Dessa värden jämfördes sedan mot kraven i SIS-TS 21144:2016. För att bestämma absoluta höjder mättes tio stycken träd in med totalstation. Trädens högsta och lägsta punkter koordinatbestämdes och utifrån subtraktion erhölls absoluta värden för vilka höjder från LiDAR- och fotogrammetriskt framställda trädhöjdsmodeller kom att jämföras mot. Jämförelsen mellan metoderna visade en medelavvikelse på -0,325 m för LiDAR och -0,928 m för fotogrammetrin. Slutsatsen av denna studie visar att LiDAR är den mest lämpade tekniken för detektering av trädhöjder och skapande av trädhöjdsmodeller. Detta baseras på erhållna höjdvärden, den digitala terrängmodellens kvalitet och den goda täckningen av punkter i plan och höjd för punktmolnet.<br>UAVs (Unmanned Aerial Vehicles) or drones are commonly used for collecting spatial data and aerial images by companies, state agencies and civilians. The UAV techniques makes collection of geodata easier for large areas and can be used for mapping, 3D modelling and other analyses, e.g. for volume determination. The aim of this study was to compare 3D point clouds generated from airborne laser scanning and digital photogrammetry for detecting heights of trees. It was also investigated which method produced the most reliable results and if these were applicable for detecting risk trees. The definition of risk trees in this study are trees that run the potential risk of damaging important infrastructure such as electric power transmission lines. Nowadays the collection of data is mainly conducted using helicopters for identifying the risk trees, but with UAV technologies costs can be significantly reduced. The collection of data was performed over a sparse coniferous forest area in Gävle, Sweden. Laser data was collected using a YellowScan LiDAR (Light Detection and Ranging) sensor mounted on a drone. For the photogrammetric data, a DJI Phantom 4 RTK (Real Time Kinematic) drone was used with its standard camera. Both techniques were directly georeferenced using Single station RTK and SWEPOS Network RTK respectively. To check the quality of the collected data, six control profiles were established using a total station. These measurements were then compared to the generated point clouds. Our results show that the mean deviation and standard deviation in height between LiDAR point clouds and the control profiles are -0,038 m and 0,049 m, respectively. The mean deviation and standard deviation for photogrammetric point clouds and control profiles are +0,060 m and 0.090 m, respectively. These values were then compared to the requirements in SIS-TS 21144:2016. To determine absolute tree heights, ten random trees were measured using a total station. The coordinates of the highest and lowest points of each tree were then subtracted to serve as absolute height values. The comparison of the two UAV methods showed mean height deviations of -0,325 m for LiDAR and -0,928 m for the photogrammetry. This study concludes that LiDAR is the most suitable technology of the two methods tested for detecting tree heights and creating canopy height models. This is based on the obtained height values, the quality of the digital terrain model and the good distribution of points in plane and height for the point cloud.
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Hiller, Paula, and Anna Palm. "KARRIÄRVÄGLEDNING FÖR PERSONER MED UTMATTNINGSSYNDROM : En kvalitativ studie om livslångt lärande och karriärkompetens." Thesis, Umeå universitet, Institutionen för tillämpad utbildningsvetenskap, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-185484.
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Många som drabbas av utmattningssyndrom (UMS) upplever en nedsatt kognitiv förmåga och att sjukdomen blir en brytpunkt och ett vägval som kräver en väl fungerande handlingsplan inför framtiden. Denna studie har intervjuat individer med UMS och frågat hur de ser på karriärvägledning, om den behövs och vilken typ av vägledning som de efterfrågar. Resultaten från de kvalitativa intervjuerna analyserades utifrån careershipteorin och konstruktivistisk teori och visar att personer med UMS är i behov av en livsförändring som kräver ny insikt, utsikt och framsikt för en lyckad återgång till arbetslivet och ett hälsosamt förhållningssätt till arbete och prestation. Vidare framkom det ett behov av ett holistiskt förhållningssätt där individens egen livshistoria sätts i centrum då det inte finns några mediciner eller färdiga lösningar som passar alla. Karriärkompetens och livslångt lärande är centrala delar av denna studie och med en fördjupad kunskap inom detta område kan en studie- och yrkesvägledarens insats, det vill säga karriärvägledning, vara till stor nytta för personer med UMS.<br>Many people who suffer from fatigue syndrome (UMS) experience a reduced cognitive ability that becomes a turning point, leading to a crossroad that requires a well-functioning action plan for the future. In this study, interviews with people that are or have been diagnosed with UMS have shared their opinions regarding career guidance, whether career guidance is needed, and what type of guidance they perceive as needed. The results from the qualitative interviews were analyzed drawing on careership theory and constructivist theory, showing that people with UMS are in need of a life change that requires new insight, perspective and foresight for a successful return to work and a healthy way of relating to work and accomplishment. Furthermore, the study shows that there is a need for a holistic approach where the individual's own life story is put at the center, since no medications or ready-made solutions that suit everyone exist. Career management skills and lifelong learning are central parts of this study and with an expertise within this area, a career counsellor’s contribution, i.e. career guidance, can be of great benefit to people with UMS.
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Barcella, M. "MAPPING BCR-ABL1 FUSION POINTS IN CHRONIC MYELOID LEUKEMIA BY NEXT GENERATION SEQUENCING." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/231153.
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Chronic myeloid leukemia (CML) is a myeloproliferative disorder cytogenetically characterized by a reciprocal translocation between the long arms of chromosome 9 and 22 t(9;22) that leads to the formation of the BCR-ABL1 fusion gene, coding for a deregulated tyrosine kinase with oncogenic activity. In clinical routine, mRNA amount of the chimeric transcript is considered proportional to the leukemic clone and is used for the molecular monitoring of patients. However, qRT-PCR cannot identify transcriptionally silent leukemic cells that can be present in minimal residual disease (MRD). To monitor MRD it is necessary to develop a qPCR assay on DNA sequences spanning BCR-ABL1, that are patient specific. Previous results obtained by Prof. G. Porta’s group (unpublished) have demonstrated that DNA detection is positive while mRNA is not in 30% of time points, indicating the presence of transcriptionally silent cells. Breakpoints in these patients were characterized by laborious long-range PCR and cloning not suitable for a clinical application. To overcome this limiting step we set up a DNA capturing assay to target all kind of breakpoints that give rise to different BCR-ABL1 transcripts. Captured regions were then sequenced with a next generation protocol. The idea was to use the identified patient specific breakpoints to setup qPCR assays to monitor MRD. We successfully identified BCR-ABL1 fusion points in 9 over 10 samples, with single nucleotide accuracy, by setting up a bioinformatics workflow specifically developed for this purpose. All findings were validated with Sanger sequencing. This project was performed in collaboration with Prof. Giovanni Porta of University of Insubria.
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Huang, Jianyu. "Zhen jiu zhi liao guo min xing bi yan de qu xue gui lü yan jiu /." click here to view the abstract and table of contents, 2006. http://net3.hkbu.edu.hk/~libres/cgi-bin/thesisab.pl?pdf=b20009379a.pdf.
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Harrysson, Jacob, and Johanna Strandman. "Ökad återvinning med en ny design av miljöhus." Thesis, Linnéuniversitetet, Institutionen för byggteknik (BY), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-76447.
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Detta arbete visar ett utformningsförslag på ett modernt miljöhus som skall underlätta källsortering av returförpackningar i samhället, baserat på arkitektoniska och tekniska funktioner. Arbetet grundar sig i de växande miljöproblemen som planeten jorden utsätts för, där källsortering och återvinning är två viktiga faktorer som måste utvecklas ytterligare för att kunna bidra till en förminskad klimatförändring. Studien baseras på tidigare framtagna teorier, observationer, enkätundersökningar och intervjuer med sakkunniga. Resultaten visar att ett miljöhus utformat utan fram- eller baksida och utan ingång, underlättar för sortering av avfall.<br>This work shows a design proposal of a modern recycling house, which is developed to ease waste sorting in a community, based on architectural och technical functions. The work is based on the constantly growing environmental issues that affects planet earth. Waste sorting och recycling are two important factors that have to be further developed to contribute to a reduced climate change. The study is based on previous produced theories, observations, surveys and interviews with experts in different areas. The results shows that a recycling house with no front or back and without entrance, makes it easier for people to engage in waste sorting.
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Nuhiu, Mimoza. "”… Så kom insikten om att jag var likadan som de. Att jag var spelberoende …” : – en kvalitativ studie med fyra före detta spelberoende, deras erfarenheter av att komma ur ett spelberoende." Thesis, Linnéuniversitetet, Institutionen för samhällsstudier (SS), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-35422.
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Title: ”… Then came the realization that I was just like them. That I have a gambling addiction…” This is a qualitative study of four former gamblers and their experience of getting out of the gambling addiction. The study is about how individuals have overcome a gambling addiction. The purpose of this study is to examine the social processes and factors that are of importance when overcoming a gambling addiction. In addition, the study focuses on how individuals experience the change from gambling addiction to a life free of that addiction. In this thesis, I conducted a qualitative study in the form of semi-structured interviews with four former gamblers. The theoretical approach concentrated on Ebaugh’s (1988) role exit theory and Giddens’ (2005) identity formation theory has been used to illustrate the interviewees' experiences of gambling addiction and their identity as addiction free. The study shows that the gambling addiction has brought economic, social and health-related impacts and some of these aspects still exist today. The exit out of a gambling addiction has been a process with different phases and events where the process for some has been incrementally with relapses during the journey. Based on my results, the changing process appears to consist of parallel turning points where different and more significant events give rise to role exit. The study shows the need of continuous social support in combination with gambling association support efforts and the gamblers’ own insight, motivation and freedom of action. It appears that the interviewed have accepted their role that they had left behind and they take careful consideration to the past and the future and try to make more conscious choices and build their new identity. This is done by actions and re- evaluations of themselves and their world. It is based on their lives, by their own choices. However, these choices seem to be limited by conditions that occur in the interaction with the environment, social norms and social situations.
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Lindström, Simon. "Utveckling av metoder för att säkerställa kvaliteten på höjddata insamlad med UAV : Fastställande av tillvägagångssätt vid luftburen datainsamling." Thesis, Karlstads universitet, Fakulteten för hälsa, natur- och teknikvetenskap (from 2013), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-84722.
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Företaget Team Exact levererar mätningstekniska tjänster, där den främsta verksamheten är riktad mot byggnads- och markindustrin. Företaget använder UAS och levererar tjänster till kunder med ortofoto och DEM som kan användas till kartläggning, volymberäkningar och planering. Team Exact använder konsultföretagets SkyMap’s webbaserade plattform i fotogrammetrisk bearbetning av UAV genererade flygbilder. DEM behöver uppnå HMK-standardnivå 3 för att användas som underlag till bygghandlingar. För att uppnå HMK-standardnivå 3 så krävs det en lägesosäkerhet på 0,02–0,05 m/ 0,03–0,07 m (plan/höjd). Team Exact uppnår god lägesosäkerhet i plan men har varierande resultat i höjdåtergivningen. Studien har således en målsättning att hitta metoder för att säkerställa höjden inom ett studieområde med varierande topografi, terräng och markytor. Faktorer som ska undersökas är markstödspunkter, RTK-data, flygstråk, kamerainställningar och tänkvärda åtgärder i skiftande topografi samt att se tendenser hur höjdåtergivningen varierar på olika markytor. Ett stomnät etablerades över studieområdet med tre fastställda koordinatsatta stompunkter, punkterna var inmätta med statisk NRTK mätning under 1 minut. Nätet jämnades ut med totalstation och därefter blev kontrollpunkter, profiler, ytor och markstödspunkter inmätta. Studien utredde lägesosäkerheten med 0, 5, 9 och 12 markstödspunkter. Den UAV som användes i studien är försedd med en RTK-modul och förväntades därav tillhandahålla positioneringsdata som var av värde att utreda. Markstödspunkternas utplacering planerades med fyra konstanta i studieområdets yttrehörn och en femte konstant på studieområdets högsta höjd. Resterande punkter placerades ut i en jämnfördelning över områdets toppar och dalar. Flygmetoderna som utvärderades var förankrade i tidigare studier. Gemensamma inställningar över samtliga metoder var studieområdets avgränsning, en flyghöjd på 40 m samt flyghastigheten på 3 m/s. Resterande var flytande parametrar som var av värde att utreda. Studien justerade parametrarna gällande flygstråk, övertäckning, kameravinkel och kamerainställningar. Totalt blev det tre flygmetoder där de fyra olika markstödskombinationerna undersöktes vilket gav 12 processer att utvärdera. Utvärderingen utfördes mot 77 kontrollpunkter där RMSE-värde för höjd och plan undersöktes. Kontrollpunkterna var jämnt fördelade över ytan och marktyperna. En ytterligare analys utfördes med volymberäkningar mellan referens terrängmodeller och de genererade terrängmodellerna. Flygmetod 3 gav bästa resultat där fotogrammetriinställningen Double Grid användes och överlappningen var 80/60 % samt att kameran tiltades till -70°. Sensorkänsligheten var inställd på ISO100, bländaren ett öppningsvärde f/5 och slutartiden var inställd på 1/500s. Studiens resultat visar att flygmetod 3 som blockutjämnats med 12 markstödspunkter genererade bästa resultat på en lägesosäkerhet i plan på 0,015 m samt 0,035 m i höjd.<br>The company Team Exact delivers measurement technical services, and the main business is aimed at the construction and land industry. The company uses UAS and offers services to customers and delivers products such as orthophotos and DEMs that can be used for mapping, volume calculations and planning. Team Exact uses the consulting company SkyMap’s web-based platform for photogrammetric processing of UAV-generated aerial images. DEM needs to achieve good positional uncertainty, to achieve HMK standard level 3, it is required that the basis for construction documents has a positional uncertainty of 0.02–0.05 m / 0.03–0.07 m (level / height). Team Exact achieves good positional uncertainty in horizontal coordinates but has varying results in height reproduction. The study thus aims to find methods to ensure the height within a study area with varying topography, terrain and ground surfaces. Factors to be investigated are ground control points, RTK data, flight paths, camera settings and conceivable measures in varying topography, as well as seeing trends in how the height representation differs on different ground surfaces. A coordinate network was established over the study area with three established coordinate reference points, the points were measured with static NRTK measurement 1 minute. The network was levelled with the total station and then control points, profiles, surfaces, and ground control points were measured. The study investigated the location uncertainty with 0, 5, 9 and 12 ground control points. The UAV used in the study is equipped with an RTK module and was therefore expected to provide positioning data that was worth investigating. The placement of the ground support points was planned with four constants in the outer corner of the study area and a fifth constant at the highest level of the study area. The remaining points were placed in an even distribution over the area’s peaks and valleys. The evaluated flight methods were rooted in previous studies. Common settings across all methods were the study area delimitation, 40 m flight altitude and the flight speed of 3 m/s. Remaining were floating parameters that were of value to investigate. The study adjusted the parameters regarding flight path, coverage, camera angle and camera settings. In total, there were three flight methods where the four different ground support combinations were examined, which gave 12 processes to evaluate. The evaluation was performed against 77 control points where the RMSE value for height and plane was examined. The control points were evenly distributed over the surface and soil types. A further analysis was performed with volume calculations between the reference terrain models and the generated terrain models. Flight method 3 gave the best results where the photogrammetry setting Double Grid was used and the overlap was 80/60 % and the camera was tilted to -70 °. The sensor sensitivity was set to ISO100, the shutter had an aperture value of f/5 and the shutter speed was set to 1/500s. The results of the study indicate that flight method 3, which was levelled with 12 ground support points, generated the best results on a positional uncertainty in horizontal coordinates of 0,015 m and 0,035 m in height.
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ROTA, MATTEO. "Cut-pont finding methods for continuous biomarkers." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2013. http://hdl.handle.net/10281/40114.
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My PhD dissertation deals with statistical methods for cut-point finding for continuous biomarkers. Categorization is often needed for clinical decision making when dealing with diagnostic (or prognostic) biomarkers and a dichotomous or censored failure time outcome. This allows the definition of two or more prognostic risk groups, or also patient’s stratifications for inclusion in randomized clinical trials (RCTs).
We investigate the following cut-point finding methods: minimum P-value, Youden index, concordance probability and point closest to-(0,1) corner in the ROC plane. We compare them by assuming both Normal and Gamma biomarker distributions, showing whether they lead to the identification of the same true cut-point and further investigating their performance by simulation. Within the framework of censored survival data, we will consider here new estimation approaches of the optimal cut-point, which use a conditional weighting method to estimate the true positive and false positive fractions. Motivating examples on real datasets are discussed within the dissertation for both the dichotomous and censored failure time outcome.
In all simulation scenarios, the point closest-to-(0,1) corner in the ROC plane and concordance probability approaches outperformed the other methods. Both these methods showed good performance in the estimation of the optimal cut-point of a biomarker. However, to improve results communicability, the Youden index or the concordance probability associated to the estimated cut-point could be reported to summarize the associated classification accuracy. The use of the minimum P-value approach for cut-point finding is not recommended because its objective function is computed under the null hypothesis of absence of association between the true disease status and X. This is in contrast with the presence of some discrimination potential of the biomarker X that leads to the dichotomization issue.
The investigated cut-point finding methods are based on measures, i.e. sensitivity and specificity, defined conditionally on the outcome. My PhD dissertation opens the question on whether these methods could be applied starting from predictive values, that typically represent the most useful information for clinical decisions on treatments. However, while sensitivity and specificity are invariant to disease prevalence, predictive values vary across populations with different disease prevalence. This is an important drawback of the use of predictive values for cut-point finding.
More in general, great care should be taken when establishing a biomarker cut-point for clinical use. Methods for categorizing new biomarkers are often essential in clinical decision-making even if categorization of a continuous biomarker is gained at a considerable loss of power and information. In the future, new methods involving the study of the functional form between the biomarker and the outcome through regression techniques such as fractional polynomials or spline functions should be considered to alternatively define cut-points for clinical use. Moreover, in spite of the aforementioned drawback related to the use of predictive values, we also think that additional new methods for cut-point finding should be developed starting from predictive values.
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Yayo, Michael. "Orsaker samt avslut av kriminella karriärer : En studie med bistånd från teorin om sociala band." Thesis, Södertörns högskola, Socialt arbete, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-40845.
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Crime comes in many different forms and can be viewed differently depending on culture, individual factors and geography. This increases the importance of discussing the subject by continually analyzing its causes, to eventually enable the development of methods and means to stop it. This study seeks to contribute to this process by analyzing factors that influence crime but also the ending of it, in the context of social factors. Accordingly, the overall goal of the study is to contribute to broadening the know-how about what influences criminal careers to help in the development of methods to stop them. This is done by analyzing the field from in two approaches; (1) what indicate crimes and (2) what contributes to the ending. This is of great importance today as it will fill a prevailing shortage in previous research which tend to focus on the field in one of the two approaches and often with the same type of participants. To achieve its purpose, the study includes individuals which are young with on-going criminal lifestyles and older which have put their criminal past behind them. Through the study analysis six themes where identified; threat of punishment, drug abuse, family relations, environmental aspects and school.<br>Brott förekommer i många olika former och betraktas skiftande beroende på kultur, individuella och geografiska faktorer. Brottslighet är dessutom ett eskalerande samhällsproblem som har med sig stora negativa konsekvenser på ekonomisk aktivitet och den psykiska hälsan hos samhällsinvånare. Detta sätter stor vikt på att kontinuerligt diskutera ämnet och analysera orsaker till kriminalitet för att vidareutveckla förebyggande metoder och processer. Denna studie bidrar till denna process genom att analysera faktorer som indikerar brott men också varför respondenter valt att avsluta sina kriminella karriärer, i samband med sociala band teorin. Följaktligen, är det övergripande målet att bidra till att bredda kunskapen om vad som påverkar kriminella karriärer och därav bidra till utvecklingen av metoder för att stoppa dem. Detta utförs genom att analysera studieområdet ur två olika infallsvinklar; (1) vad som skapar brott och (2) vad som stoppar det. Detta ger inte enbart studien samhällsviktig tyngd utan bidrar också till en bristfällig forskning som tenderar att endast fokusera på en infallsvinkel och ofta i datainsamling från samma typ av deltagare. För att uppnå sitt syfte har studien inkluderat individer med pågående kriminell livsstil samt personer vars kriminella karriär ligger bakom dom. Sex teman identifierades under studieanalysen; straffhot, drogmissbruk, familjerelationer, miljöaspekter och skola.
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Bergroth, Simon. "Implementering av MPPT-enhet med återkoppling : avsedd för solceller." Thesis, Högskolan i Gävle, Elektronik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-30492.
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Hultqvist, Karolina, and Liselotte Näslund. "Vägar ut ur hemlöshet : En jämförande studie av individer med respektive utan en psykisk funktionsnedsättning upplevelse av vägar ut ur hemlöshet." Thesis, Ersta Sköndal högskola, Institutionen för socialvetenskap, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:esh:diva-1618.
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Studien handlar om processen som leder ut ur hemlöshet, och jämför personer med en psykisk funktionsnedsättning och personer utan. Uppsatsen bygger på kvalitativa intervjuer med nio personer som har lämnat hemlöshet och missbruk. Fokus för studien och intervjuerna har varit individens upplevelse av processen som leder ut ur hemlöshet. Fem av intervjupersonerna hade en psykisk funktionsnedsättning och fyra av intervjupersonerna hade ingen diagnos. Vi har använt oss av Helen Ebaughs (1988) exitteori för att tolka och tematisera resultatet. I analysen har vi utvecklat teorin utifrån resultatet, då teorin inte beskriver individer som lämnar rollen som hemlös. Processen som leder ut ur hemlöshet har sett olika ut för intervjupersonerna i studien men det har funnits gemensamma inslag. Processen har tagit tid, vilket har varit viktigt för individen för att lyckas etablera sig i den nya rollen. För intervjupersonerna har det varit centralt att tillfriskna från missbruk för att ta sig igenom processen som leder ut ur hemlöshet. I början av processen var det viktigt att få lugn och ro omkring sig och senare i processen att finna en meningsfull sysselsättning samt en ny umgängeskrets för att kunna etablera sig och känna trygghet i den nya rollen. För många har självhjälpsgrupper eller ideella föreningar varit en plattform för dessa aspekter. Många har uppgett att det varit svårt att bryta med tidigare bekanta som fortfarande var kvar i missbruk. En annan svårighet som har beskrivits var misstroende från myndigheters sida. Processen som leder ut ur hemlöshet har varit likartad för personer med eller utan en psykisk funktionsnedsättning. Skillnaden har bestått i den sista fasen, att bygga nytt, då det har varit viktigt för personer med en psykisk funktionsnedsättning att få förståelse och kunskap om samt professionell hjälp med sin funktionsnedsättning.
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Deurell, Göran. "Kollektivtrafik på svaj : En fallstudie för ökad tillgänglighet vid långa bytessträckor med fokus på vattenburen kollektivtrafik." Thesis, Blekinge Tekniska Högskola, Institutionen för fysisk planering, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-11809.
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Vattenburen kollektivtrafik tenderar att ha längre bytessträckor än buss och spårtrafik. Då långa byten kräver mer av resenären är uppsatsens syfte att undersöka hur bytet till och från pendelbåtar kan se ut vid en för trafiken större bytespunkt. Därigenom kanske vi kan lära oss mer om resenärens informationsbehov vid byten över längre avstånd. Därtill har målet varit att presentera rekommendationer som kan stärka förutsättningarna för vattenburen kollektivtrafik, med särskilt fokus på bryggan (angöringspunkten) vid Klara Mälarstrand och den närliggande järnvägsstationen Stockholm Central. Arbetet har utförts i form av en fallstudie som undersökte platsen utifrån upplevd närhet och -tydlighet, med empiri bestående av egentagna bilder, kartor, avståndsmätningar samt dokument. Datainsamlingen pågick under lång tid, parallellt med Trafiknämndens egna utredningar av trafik till och från bryggan. Analysen visade att bryggan vid Klara Mälarstrand är bristfälligt integrerad med omgivande kollektivtrafik och att en tydlig vägledning saknas. I diskussionen förs ett resonemang om vikten av att entréer till kollektivtrafiken, exemplifierat av pendeltågens nya station Stockholm City, synliggör sin funktion även på långt håll. Resenärer bör även ges möjlighet att relatera längre bytessträckor till en tidsåtgång, liknande den ’uppskattad gåtid till gate’ som används på storflygplatser som Köpenhamns flygplats Kastrup.<br>Public transport on water tend to have longer transfer paths than bus and rail transport. As long transfers paths demands more from the passenger this thesis aims to investigate what a transfer to and from water buses may look like at a transfer point with public transport on water of major importance for a planned service in Stockholm, Sweden. Through that more knowledge about the information needs of passengers at transfers over longer distances might be gained. In addition the thesis aims to present recommendations which can strengthen the conditions for public transport on water, with a focus on the stop (quay) near the Stockholm Central station. The thesis has been carried out as a case study which examined the study area on the basis of perceived proximity and -legibility,with empirics consisting of images taken by the author, maps, distance measurements and documents. Data collection time has been long, in parallel with the Stockholm County Administrations (SLL) own investigations of the traffic. The analysis showed that the quay at Klara Mälarstrand has a lacking integration with surrounding public transport and that a clear wayfinding is missing. In the discussion an argument for the importance of legible entrances to public transport also at a distance is made, exemplified by the new Stockholm City commuter train station building. Also passengers at longer transfer paths needs to be able to relate the distance with the time to get there, similar to the ‘approximate walking time to gate’ used at major airports such as Copenhagen Airport, Kastrup in Denmark.
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Thorley, My, and Mikaela Karlsson. ""Det som skulle varit en kompromiss utan barnen blir kanske ett val med barnen" : En kvalitativ studie om mäns föräldrablivande, karriär och identitet." Thesis, Malmö universitet, Fakulteten för lärande och samhälle (LS), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mau:diva-43701.
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Denna studie fokuserar på män och deras upplevelser vid brytpunkten föräldrablivande och dess påverkan på livets rutiner. Fokus ligger på karriär och identitet och eventuella kompromisser inom områdena. Tidigare forskning påvisar att kvinnor statistiskt sett kompromissar mer än män med sin karriär, sett till uttagna vab- och föräldradagar, men tar inte upp just upplevelserna kring dessa kompromisser. På så vis upptäcktes en forskningslucka som ledde till frågeställningen: Hur upplever män sitt eget föräldrablivande och eventuella kompromisser i relation till den egna identiteten och karriären? Syftet blev således att genom kvalitativa intervjuer åskådliggöra och vidare studera informanternas upplevelser av eventuella kompromisser till följd av föräldrablivande gällande identitet och karriär. De teoretiska begrepp som använts är STF-modellens tre system; individ, sociala samt miljö- och samhälleliga systemet, roller och livskarriär samt brytpunkter, rutiner och pragmatiskt rationella val. Resultatet visar att männens liv och rutiner påverkats och förändrats till följd av föräldrablivandet. Fritidsintressen, socialt umgänge och yrkesmässiga prioriteringar och prestationskrav har minskat. Dessa omformas i och med att självbilden transformerats med ett nytt syfte och fokus. Den mest centrala slutsatsen i studien är att om justeringar i karriär och identitetsutövning ska upplevas som kompromisser behöver en förväntan utifrån finnas. När dessa förväntningar saknas upplevs istället justeringarna som aktiva val till följd av ändrade värderingar och prioriteringar.