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Kallerud, Torjus Selvén. "A 10 dBm 2.4 GHz CMOS PA." Thesis, Norwegian University of Science and Technology, Department of Electronics and Telecommunications, 2006. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-9317.
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This report describes the assessment and design of a 10 dBm 2.4 GHz CMOS PA including driver stage. The PA is designed in a 0.18 um CMOS technology. A three stage PA has been designed due to the high voltage gain needed. Class F has been chosen for the output stage. An output filter short-circuiting the second harmonic frequency and reflecting the third harmonic frequency is used to obtain the near-square drain voltage that is characteristic to class F. A lowered supply voltage of 0.9 V is used to avoid exceeding the transistor break-down voltage of 2 V. The typical output power achieved is 10.2 dBm. The drain efficiency of the output stage is 47.7 %, and the PAE of the entire PA is 30.5 %. The final layout excluding bonding pads consumes an area of 0.66 mm2, including four internal inductors consuming a total of 0.59 mm2. The PAE obtained is higher than those of a selection of recently published PAs that are comparable in technology, frequency and output power.
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Claros, Rocabado Vladimir. "Influencia del uso de un modelo "Data Based Mechanistical" (DBM) en resultados de modelos hidrológicos continuos aplicados a cuencas alteradas." Tesis, Universidad de Chile, 2018. http://repositorio.uchile.cl/handle/2250/151777.
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Magíster en Ciencias de la Ingeniería, Mención Recursos y Medio Ambiente HídricoDeterminar de forma confiable y anticipada la cantidad de agua que puede generar una cuenca como respuesta a las forzantes meteorológicas a las que es sometida, es fundamental para la planificación y optimización del uso de este recurso. Un requisito fundamental para determinar esta relación, es contar con caudales correspondientes al estado natural de la cuenca (Cuencas inalteradas) para realizar la calibración, sin embargo, muchas veces, no se cuenta con mediciones en las zonas que desean estudiarse (cuencas no controladas) o las mediciones registradas, no corresponden al caudal natural de la cuenca, debido a extracciones, tomas no contabilizadas, desvíos, etc. El objetivo de este estudio es proponer y analizar una metodología que permita obtener simulaciones con coeficientes de eficiencia aceptables, de los valores registrados en sistemas que tienen un registro de caudal acotado (alterado) registrando sólo parcialmente los caudales generados por la cuenca. Para alcanzar el objetivo, como primer paso, se modela la zona estudiada, aplicando los programas HEC-HMS y MIKE-NAM en modo continuo, para evaluar su capacidad y limitantes para representar el fenómeno, siguiendo las bases teóricas que se sustentan las buenas prácticas del uso de estos modelos. Posteriormente, al verificar la incapacidad de los modelos utilizados de representar de forma adecuada los hidrogramas registrados, se utiliza una herramienta basada en la teoría de Modelos mecanísticos basados en datos (DBM) denominada Conceptual developer Model (CMD), para que la misma en base a los datos obtenidos utilizando los modelos hidrológicos y los datos registrados, simule la operación de la obra de toma que es la que gobierna la cantidad de agua que se capta de la cuenca y es posible de ser registrada. Como resultado de este trabajo se obtiene que una vez aplicado el CMD, pueden generarse hidrogramas comparables a los observados, con coeficientes de eficiencia de Nash Sutcliffe de hasta 0.89. Los resultados obtenidos, reflejan que a través de este procedimiento se puede obtener un pronóstico confiable de los caudales captados, lo cual contribuye en el caso estudiado a la implementación de un sistema de pronóstico a corto plazo (escala semanal como máximo) de caudales aportantes al sistema para la generación hidroeléctrica.
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GHAITH, AFIF. "LEBANESE SUBMARINE CANYONS AND THEIR ROLE IN SEDIMENT TRANSFER FROM SHALLOW TO DEEP WATER." Doctoral thesis, Università degli studi di Ferrara, 2020. http://hdl.handle.net/11392/2488030.
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Submarine mass movements and their consequences are of major concern for coastal communities and infrastructures but also for the exploitation and the development of seafloor resources. Elevated awareness of the need for better understanding of the underwater mass movement is coupled with great advances in underwater mapping technologies over the past two decades.
The seafloor in the Bay of Jounieh and Beirut North (Lebanon) is characterized by deep canyons, reaching one thousand meters depths in proximity of the coast. Signs of submarine mass movement instability related to these canyons create a connection between shallow and deep water. The presence of these canyons in a tectonically active area generates a particular drained mechanism to the sediment in form of mass movement and slumping.
Since this area is poorly explored, in the framework of an international project between Lebanese Navy Hydrographic Service, Lebanese National Center for Marine Sciences, University of Ferrara and Italian Navy Hydrographic Institute, we analyse the morpho-bathymetric and sedimentological characters of the coastal and shelf sectors. Multibeam echosounder and sub-bottom profiler acoustic systems calibrated with ground truths (sediment grabs) in accordance to the International Hydrographic Standards allow us to characterize the nature of seafloor and sub-seafloor. The detection of particular undersea features provides detail maps which are in support to littoral morpho-dynamics, coastal transport and sediment budget. This high resolution multibeam bathymetry dataset, integrated by the sedimentological characters, will provide useful constraints to the potential natural hazards that may be caused by active tectonics in the offshore and a high coastal risk in one of the most populated region of Lebanon.
The study aims to evaluate the role of the area's submarine canyons in the underwater mass movements, taking into account: 1) the evaluation of the environmental condition of the Jounieh Bay, 2) the sediment deposit dynamics along and across the Lebanese continental shelf and slope, and finally 3) the sediment movement inside canyons heads in the Jounieh-Beirut Basin.
The above studies allowed us to discover that although canyons in the research's area belong to the same continental margin, share more or less the same morphology and are located few kilometres apart, they display a relevant variability in their geometry, morphology, sedimentary processes, and where the SW current is the main governing cause of sediment movement, and to highlight the important role that the Jounieh-Beirut Basin plays in the Lebanese underwater dynamics, comparing its status in 2019 with a previous work achieved by Goedicke and Sagebiel (1976).I movimenti di massa sottomarini con le loro conseguenze sono di un grande interesse per le comunità e le infrastrutture costiere e anche per lo sfruttamento e lo sviluppo delle risorse del fondale marino. L’elevata consapevolezza della necessità di una migliore comprensione del movimento di massa sottomarino è accompagnata da grandi avanzamenti nelle tecnologie di rilievi sottomarini durante gli ultimi due decenni. Il fondale marino nella baia di Jounieh e del Nord di Beirut (Libano) è caratterizzato dalla presenza di profondi canyons che raggiungono mille metri di profondità in prossimità della costa. I segni dell’instabilità del movimento di massa sottomarino relativi a tali canyons creano una connessione tra acque basse e acque profonde. La presenza di questi canyons in un’area tettonicamente attiva genera un particolare meccanismo di drenaggio del sedimento sotto la forma di movimento di massa e di crolli. Visto che l’area è poco esplorata, nel contesto di un progetto internazionale tra il servizio idrografico della Marina Libanese, il centro nazionale libanese per le scienze del mare, l’Università di Ferrara e l’istituto idrografico della Marina Militare Italiana, analizziamo i caratteri morfo-batimetrici e sedimentari dei settori costieri e della piattaforma continentale. Gli ecoscandagli multifasci ed i sistemi acustici ‶Sub-bottom profilers″, calibrati con dati reali (raccolta di sedimenti), in conformità con gli standard internazionali dell’idrografia, ci permettono di caratterizzare la natura del fondale e del sotto fondale. La rivelazione di oggetti sottomarini particolari fornisce delle mappe di dettaglio a supporto di analisi di morfodinamica litorale, trasporto costiero e budget sedimentario. Questi dati batimetrici da sistemi multifasci di alta risoluzione, integrati con i caratteri sedimentologici, forniscono dati utili per potenziali rischi naturali che potrebbero essere causati da tettonica attiva nella zona offshore, e per un alto rischio costiero in una delle regioni le più popolate del Libano. Questo studio ha lo scopo di valutare il ruolo dell’area dei canyons sottomarini nei movimenti di massa sottomarini, considerando: 1- La valutazione della condizione ambientale della baia di Jounieh. 2- Le dinamicità del deposito sedimentario lungo e attraverso la piattaforma continentale e lo slope libanese e finalmente, 3- Il movimento del sedimento nelle teste dei canyons nel bacino Jounieh-Beirut. Questi studi ci hanno permesso di scoprire che i canyons nell’area di ricerca nonostante la loro appartenenza allo stesso margine continentale, la condivisione più o meno della stessa morfologia e la loro presenza a pochi chilometri l’uno a altro, mostrino una relativa variabilità nella loro geometria, morfologia, e processi sedimentari, la corrente SW è la causa principale che controlla il movimento del sediment. Lo studio evidenzia il ruolo importante che il bacino di Jounieh-Beirut gioca nella dinamicità sedimentaria dei fondali libanesi, anche grazie al confronto tra il suo stato attuale (2019) e la situazione nel 1976.
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Fawcett, Christopher P. "Data-based mechanistic modelling (DBM) of nonlinear environmental systems." Thesis, Lancaster University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310479.
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Vieira, Marcos Rodrigues. "DBM-tree: método de acesso métrico sensível à densidade local." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/55/55134/tde-27072004-141623/.
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Um espaço métrico é definido por um conjunto de objetos e uma função de distância métrica, que é utilizada para avaliar o nível de similaridade entre estes objetos. Isto permite a elaboração de Métodos de Acesso Métricos (MAMs) capazes de responder consultas por similaridade nesses conjuntos em um tempo reduzido. Em geral, esses MAMs são materializados através de uma estrutura hierárquica chamada de árvore métrica. Normalmente essas árvores são mantidas balanceadas, pois isto tende a manter a altura da árvore mínima, reduzindo o número de acessos a disco necessários para responder às consultas. No entanto, é difícil manter as estruturas balanceadas sem a existência de sobreposição entre os nós que cobrem regiões de alta densidade de objetos. O efeito disto é a degradação do tempo das consultas, pois várias subárvores devem ser analisadas para compor as consultas. Em outras palavras, minimizar a sobreposição entre os nós aumenta a eficiência das árvores métricas. Um meio efetivo para isto é flexibilizar o balanceamento das árvores métricas. Este trabalho apresenta um novo MAM dinâmico, chamado de DBM-tree (Density-Based Metric tree), que permite flexibilizar o balanceamento da estrutura, minimizando o grau de sobreposição entre os nós em regiões densas e, conseqüentemente, aumentando o seu desempenho para responder às consultas. Essa flexibilização é ajustada pelo usuário e é rigidamente controlada pela estrutura. A profundidade da árvore é maior em regiões de alta densidade, procurando um equilíbrio entre o número de acessos a disco para avaliar múltiplas subárvores e para a busca em profundidade em cada subárvore. A DBM-tree possui um algoritmo de otimização chamado de DBM-Slim-Down, que melhora o desempenho das árvores através da reorganização de elementos entre os seus nós. Os experimentos feitos com dados reais e sintéticos mostram que a DBM-tree supera em desempenho os MAMs tradicionais. Ela é, em média, 50% mais rápida que os MAMs tradicionais e reduz o número de acessos a disco e cálculos de distância em até 50%. Depois de executado o algoritmo DBM-Slim-Down, o seu desempenho melhorou em até 30% para as consultas por abrangência e aos vizinhos mais próximos. Ainda, a DBM-tree é escalável considerando tempo total de processamento, número de acessos a disco e de cálculos de distância em relação ao tamanho do conjunto de dados indexado.A metric space is defined as a set of objects and a metric distance function that is used to measure the similarity between these objects. It allows the development of Metric Access Methods (MAMs) that are able to answer similarity queries in these datasets quickly. Usually these MAMs are materialized through a hierarchical structure called metric trees. These trees are kept balanced because it tends to maintain the height of the tree small, aiming to reduce the number of disk access required to answer queries. However, it is difficult to maintain the tree balanced without overlapping nodes covering a large number of objects, leading to the degradation of query performance. In other words, reducing the overlap among nodes increases the performance of metric trees. A possible solution is to relax the need to keep metric trees balanced. This work presents a new dynamic MAM called DBM-tree (Density-Based Metric tree), which changes the rule that imposes a rigid balancing policy, allowing a small amount of unbalancing in some regions of it. This unbalancing minimizes the degree of overlapping among some high-density nodes and, consequently, increases query answering performance. The amount of relaxation is set by the user and is strongly enforced in the tree. The height of the tree is higher in high-density regions, in order to keep a balance between searching in various subtrees and searching deeply in each subtree. The DBM-tree has an optimization algorithm called DBM-Slim-Down that improves the performance in trees through reorganizing the elements among its nodes. The experiments performed over synthetic and real-world datasets showed that the DBM-tree outperforms the traditional MAMs. The DBM-tree is, in average, 50% faster than traditional MAMs and reduces the number of distance calculations and disk accesses up to 50%. After executing the DBM-Slim-Down algorithm, the performance achieves improvements up to 30% for range and k-nearest neighbor queries. Moreover, the DBM-tree is scalable regarding time, number of disk accesses and distance calculations.
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Arnold, Stephanie Lorraine. "An in vitro evaluation of DBM as a tissue engineered scaffold." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1193079966/.
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Rajagopalan, Vidya. "Increasing DBM Reliability using Distribution Independent Tests and Information Fusion Techniques." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/30158.
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In deformation based morphometry (DBM) group-wise differences in brain structure are measured
using deformable registration and some form of statistical test. However, it is known that DBM
results are sensitive to both the registration method and statistical test used. Given the lack of an
objective model of group variation it has been difficult to determine the extent of the influence
of registration implementation or contraints on DBM analysis. In this thesis, we use registration
methods with varying levels of theoretic similarity to study the influence of registration mechanics
on DBM results. We show that because of the extent of the influence of registration mechanics
on DBM results, analysis of changes should always be made with a thorough understanding
of the registration method used. We also show that minor variations in registration methods can
lead to large changes in DBM results. When using DBM, it would be imprudent to use only one
registration method to draw any conclusions about the variations being studied. In order to provide
a more complete representation of inter-group changes, we propose a method for combining
multiple registration methods using Dempster-Shafer evidence theory to produce belief maps of
categorical changes between groups. We show that the Dempster-Shafer combination produces a
unique and easy to interpret belief map of regional changes between and within groups without the
complications associated with hypothesis testing.
Another, often confounding, element of DBM is the parametric hypothesis test used to specify
voxels undergoing significant change between the two groups. The accuracy and reliability of
these tests are contingent on a number of fundamental assumptions made about the distribution of
the data used in the tests. Many DBM studies often overlook these assumptions and fail to verify
their validity for the data being tested. This raises many doubts about the credibility of the results
from such tests. In this thesis, we propose to perform statistical analysis on DBM data using nonparametric,
distribution independent hypothesis tests. With no data distributional assumptions,
these tests provide both increased flexibility and reliability of DBM statistical analysisPh. D.
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Blice, Rebecca L. "EFFICACY OF DEMINERALIZED BONE MATRIX AS AN OSTEOINDUCTIVE AGENT WHEN USING A BETA-TRICALCIUM PHOSPHATE CARRIER." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1162918440.
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Liese, Juliane [Verfasser]. "Humane demineralisierte Knochenmatrix (DBM) im Tissue Engineering von humanem Knorpelgewebe / Juliane Liese." Berlin : Medizinische Fakultät Charité - Universitätsmedizin Berlin, 2009. http://d-nb.info/1027813879/34.
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Osorio, Gutierrez Jessica Aquilina. "Desarrollo de un proceso integrador basado en ampliaciones SAP en el módulo DBM." Bachelor's thesis, Universidad Nacional Mayor de San Marcos, 2018. https://hdl.handle.net/20.500.12672/15137.
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En los proyectos de implementación de SAP siempre surgen requerimientos complejos en los
cuales se necesita gente especializada en consultoría funcional y técnica ABAP. Este es el caso
mencionado en el presente informe profesional, en la cual en plena implementación del
Módulo DBM en una de las empresas concesionarios más importantes de país, surgió un
requerimiento complejo el cual en una intensa evaluación por parte del consultor funcional no
se pudo solucionar por configuración. Esto hizo que surja la necesidad de la creación de un
requerimiento para que sea desarrollado, en él se detalló los flujos según escenarios detallados
en la fase 1 y 2 de la metodología ASAP. Al ser un requerimiento complejo en desarrollo se
me fue asignado ya que poseo los conocimientos necesarios para poder desarrollarlo. El
requerimiento en mención es lo que se detalla en el presente informe y se hace énfasis en la
fase de realización, en la cual se detalla el uso de las ampliaciones SAP, seleccionadas previo
análisis en cada uno de los escenarios descritos en la especificación funcional. A su vez se
describen los escenarios adicionales los cuales surgieron en la etapa de pruebas unitaria e
integrales. El informe también detalla las buenas prácticas en cuanto al uso de técnicas de
modularización en la programación ABAP. Como resultado de este desarrollo se tuvo una
buena salida en vivo y soporte post-productivo, lo cual permite que la empresa pueda venderlo
como paquete de solución a otros clientes que implementen el módulo DBM en sus empresas.Trabajo de suficiencia profesional
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Edwards, Alise Sarah. "An investigation of the in vivo effects of DBM effectors on endogenous cathecholamine metabolism." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/30043.
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Mui, Andrew K. "A 20 dBm 5-14 GHz power amplifier with integrated planar transformers in SiGe." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43071.
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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2008.Includes bibliographical references (leaves 73-74).
The integration of radar systems has taken a long journey into the modern world. Advances in signal processing technology and integrated circuit technology have lead the way for smaller, more integrated radar systems. Specific to the hardware side of a radar, the RF generation and detection once done in one location in the radar is now being replaced by small sub-elements which combine RF generation and detection at the element level. This work describes a power amplifier that can be used at the element level. The design methodology for a single stage amplifier in a Silicon Germanium Bipolar process covering 5-14 GHz is discussed. Simulation results and measurement results closely match and show peak power outputs of 25 dBm and peak power-added efficiencies (PAE) of approximately 32 %.
by Andrew K. Mui.
S.M.
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Evans, Chheng-Orn Ny. "Correlation of antihypertensive activity of novel DBM substrates with adrenergic catecholamine levels in spontaneously hypertensive." Thesis, Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/27418.
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Erdemli, Ozge. "Biocompatibility And Biomechanical Properties Of New Polycaprolactone-bioglass Based Bone Implant Materials." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608785/index.pdf.
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Researches on bone defects are focused on the use of composites due to the
composite and well-organized hierarchical structure of the bone. In this study,
it is aimed to develop Polycaprolactone based implants with different organic –
DBM, HYA- and/or inorganic &
#8211
bioglass, calcium sulfate- compositions for augmenting bone healing. Bioactivity of the discs was evaluated by scanning electron microscopy and EDS analysis after incubation in SBF for 1, 7 and 14 days. All bioglass containing groups showed apatite molecules at different incubation times. Degradation studies demonstrated that only PCL/BG/HYA discs had fast degradation upon incubations in PBS (4 and 6 weeks). Initial mechanical properties of composites were found to be directly related to the composition. However, decreases in disc mechanical properties were also obtained in the same order with the amount of water uptake at composite groups. According to biocompatibility studies investigated with cytotoxicity tests on Saos-2 cells, all groups, except the HYA involving one were found as biocompatible. After in vivo application of discs to critical size defects on rabbit humeri (for 7 weeks), their efficacy on healing was studied with computerized tomography, SEM and biomechanical tests. The results revealed that bone-implant interface formation has started for all groups with high bone densities at the interface of implant groups compared to empty defect sites of negative controls. Also the healing was suggested to be gradual from bone to implant site as microhardness values increased at regions closer to bone. However, regeneration was found to not reach to healthy bone levels.
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Antypas, Elias Joseph. "The Characterization of Menkes Copper Transporter and Dopamine ß-monooxygenase Carboxy-Terminus in Neuroendocrine Cells." University of Toledo Health Science Campus / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=mco1213789670.
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Baker, Bryant. "A 3.6 GHz Doherty Power Amplifier with a 40 dBm Saturated Output Power using GaN on SiC HEMT Devices." PDXScholar, 2014. https://pdxscholar.library.pdx.edu/open_access_etds/1781.
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This manuscript describes the design, development, and implementation of a linear high efficiency power amplifier. The symmetrical Doherty power amplifier utilizes TriQuint's 2nd Generation Gallium Nitride (GaN) on Silicon Carbide (SiC) High Electron Mobility Transistor (HEMT) devices (T1G6001032-SM) for a specified design frequency of 3.6 GHz and saturated output power of 40 dBm. Advanced Design Systems (ADS) simulation software, in conjunction with Modelithic's active and passive device models, were used during the design process and will be evaluated against the final measured results. The use of these device models demonstrate a successful first-pass design, putting less dependence on classical load pull analysis, thereby decreasing the design-cycle time.
The Doherty power amplifier is a load modulated amplifier containing two individual amplifiers and a combiner network which provides an impedance inversion on the path between the two amplifiers. The carrier amplifier is biased for Class-AB operation and works as a conventional linear amplifier. The second amplifier is biased for Class-C operation, and acts as the peaking amplifier that turns on after a certain instantaneous power has been reached. When this power transition is met the carrier amplifier's drain voltage is already approaching saturation. If the input power is further increased, the peaking amplifier modulates the load seen by the carrier amplifier, such that the output power can increase while maintaining a constant drain voltage on the carrier amplifier.
The Doherty power amplifier can improve the efficiency of a power amplifier when the input power is backed-off, making this architecture particularly attractive for high peak-to-average ratio (PAR) environments. The design presented in this manuscript is tuned to achieve maximum linearity at the compromise of the 6dB back-off efficiency in order to maintain a carrier-to- intermodulation ratio greater than 30 dB under a two-tone intermodulation distortion test with 5 MHz tone spacing. Other key figures of merit (FOM) used to evaluate the performance of this design include the power added efficiency (PAE), transducer power gain, scattering parameters, and stability. The final design is tested with a 20 MHz LTE waveform without digital pre-distortion (DPD) to evaluate its linearity reported by its adjacent channel leakage ratio (ACLR).
The dielectric substrate selected for this design is 15 mil Taconic RF35A2 and was selected based on its low losses and performance at microwave frequencies. The dielectric substrate and printed circuit board (PCB) design were also modeled using ADS simulation software, to accurately predict the performance of the Doherty power amplifier. The PCB layout was designed so that it can be mounted to an existing 4" x 4" aluminum heat sink to dissipate the heat generated by the transistors while the part is being driven. The performance of the 3.6 GHz symmetrical Doherty power amplifier was measured in the lab and reported a maximum PAE of 55.1%, and a PAE of 48.5% with the input power backed-off by 6dB. These measured results closely match those reported by design simulations and demonstrate the models' effectiveness for creating a first-pass functional design.
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Huber, Elisabeth [Verfasser]. "Einfluss von demineralisierter Knochenmatrix (DBM) und deren Anreicherungen mit BMP-2 oder Gentamicin auf die Knochenheilung im Schafmodell / Elisabeth Huber." Berlin : Freie Universität Berlin, 2016. http://d-nb.info/1117028461/34.
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Kogler, Johann [Verfasser], Jens [Akademischer Betreuer] Lehmberg, Jens [Gutachter] Lehmberg, and Peter [Gutachter] Prodinger. "Evaluation des Nutzens von humaner demineralisierter Knochenmatrix (DBM) bei HWS- Spondylodesen / Johann Kogler ; Gutachter: Jens Lehmberg, Peter Prodinger ; Betreuer: Jens Lehmberg." München : Universitätsbibliothek der TU München, 2019. http://d-nb.info/1202921965/34.
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Bäckström, Alexander. "A new digital bathymetric model of Lake Vättern, Southern Sweden." Thesis, Stockholms universitet, Institutionen för geologiska vetenskaper, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157122.
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Jaklovsky, Simon. "Drag based forecast for CME arrival." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-415153.
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Coronal Mass Ejections (CMEs) are considered to be one of the most energetic events in the heliosphere. Capable of inducing geomagnetic storms on Earth that can cause damage to electronics, a pillar which the modern society we live in leans heavily upon. Being able to accurately predict the arrival of CMEs would present us with the ability to issue timely warnings to authorities and commercial actors, allowing for protective measures to be put in place minimizing the damage. In this study the predicted arrival times and speeds from the Drag Based Model (DBM) and Drag Based Ensemble Model (DBEM) were compared to observational data from a set of 12 events containing fast, Earth-directed Halo CMEs and their corresponding shocks. Although DBM was developed to model CME propagation, varying some parameters allow it to be used for estimating shock/sheath arrival. The results presented in this study indicate that on average DBM performs best when the drag-parameter γ is in the range 0.2 ≤ γ ≤ 0.3. However the variability in the results show that determining a universal value of γ for fast CMEs does not increase the consistency in the model's performance. For completeness, further investigation is needed to account for not only halo CMEs. This will allow to test broader range of variation in the DBEM input parameters.
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Cardoso, Camila Pires. "Potencial inseticida das proteínas Cry1Ca e Cry2Ac de Bacillus thuringiensis Berliner para populações de Plutella xylostella (L.) (Lepidoptera : Plutellidae) em laboratório. /." Jaboticabal, 2019. http://hdl.handle.net/11449/182492.
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Orientador: Sergio Antonio de BortoliResumo: O cultivo intensivo de Brassicaceae favorece o aparecimento de algumas pragas como Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae), a traça-das-crucíferas, cujos danos podem comprometer seriamente a produção. Esse inseto-praga pode ser controlado tanto com inseticidas sintéticos, como com biológicos, sendo, no entanto, usualmente utilizados os sintéticos em seu combate. A traça-das-crucíferas foi a primeira espécie de inseto a ser constatada resistência a inseticidas biológicos, com o uso indiscriminado de inseticidas sintéticos para o seu controle contribuindo também para a seleção de indivíduos tolerantes ou resistentes, além de causar a mortalidade de organismos não alvos. Sendo assim, este trabalho teve por objetivo avaliar a atividade inseticida e os efeitos subletais de duas toxinas lepidóptero-ativas de Bacillus thuringiensis, Cry1Ca e Cry2Ac, em três populações de traças-das-crucíferas, sendo uma delas suscetível (PC) e duas consideradas resistentes (Bt e NO-QA) a toxinas de B. thuringienis, em condições de laboratório. Foram realizados bioensaios de suscetibilidade com as três populações e as toxinas Cry1Ca e Cry2Ac, estimando-se a concentração letal (CL50) e os seus efeitos subletais. A toxina Cry2Ac não causou mortalidade nas lagartas das três populações, então os testes subletais foram realizados apenas com a toxina Cry1Ca que provocou mortalidade. Os parâmetros biológicos avaliados foram: período e peso pupal, sobrevivência larval e pupal, longevi... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: Intensive brassics cultivation favors appearing of some pests as Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae), diamondback moth (DBM), whose damage can seriously compromise production. This insect-pest can be controlled either synthetic insecticides as biological insecticides, but synthetics are usually used to combat. Diamondback moth was the first insect species to be verified resistance to biological insecticides, with indiscriminate use of synthetic insecticides for its control, also contributing to selection of tolerant or resistant individuals, as well as causing mortality on non-target organisms. Therefore, the objective of this work was to evaluate insecticide activity and sublethal effects of two lepidopteran-active toxins of Bacillus thuringiensis, Cry1Ca and Cry2Ac, on three DBM populations, one of them susceptible (PC) and two considered as resistant (Bt and NO-QA) to B. thuringiens toxins under laboratory conditions. Susceptibility bioassays were performed on the three populations and toxins Cry1Ca and Cry2Ac, estimating lethal concentration (LC50) and its sublethal effects. Cry2Ac toxin did not cause mortality on the caterpillars from the three populations, so the sublethal tests were performed only with Cry1Ca toxin. The biological parameters evaluated were: pupal period and weight, caterpillar and pupal survival, male and female longevity and fecundity. The populations showed susceptibilities to Cry1Ca toxin, with statistically equal behavio... (Complete abstract click electronic access below)
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Gudmundsson, Sofia, and Anaïs Lachini. "Designing Business Models of Tomorrow : Exploring the Expansion of Cleantech-as-a-Service through an Agile approach." Thesis, Linnéuniversitetet, Institutionen för marknadsföring (MF), 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-104645.
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Background: Three mega trends are profoundly changing today’s market dynamics; climate change, digitalization, and globalization. The increasing interconnectivity and omnipresence of digital technologies are blurring the boundaries of the physical and virtual reality, implying a shift in how digital companies create value and internationalize. Also, new policies and higher customer demand in greener and smarter technologies have created new opportunities for value creation to develop cleaner technologies that foster the growth of clean-technology firms. To be competitive and persist in a sustainable and digital economy, firms must be able to cope with changing market conditions. Strategic agility can support to avoid rigidity and benefit from change, which is fostered by strong dynamic capabilities. Knowledge gaps: The study aims to address shortcomings of digital sustainability business models and specifically characterize the emerging sector of sustainable software companies offering Cleantech-as-a-Service applications. The international potential of these ventures recognizes the need to elaborate on internationalization drivers. The globally competitive environment enforces the need to be strategically agile, whereby applying agile principles to an international context can bring a comprehensive view of internationalizing digital sustainability ventures’ critical capabilities and business model characteristics. The study will also assert the role of collaborative ecosystems in an entrepreneurial internationalization. Purpose: This study will explore the emergence of Cleantech-as-a-Service and investigate how these digital entrepreneurs achieve strategic agility in global pivoting and competitive environments. Our exploratory research aims to apply agile principles to entrepreneurial internationalization strategies, where we through six in-depth interviews will discover the role of digital cleantech firms’ dynamic business models, capabilities, and ecosystems when entering a foreign market. Theoretical framework: The conceptual frame of references is based on two major sections where the first considers the context of digital and sustainable firms and exhibits the essences of digital and sustainable business model designs and how to sustain competitiveness through the interrelation of dynamic capabilities and strategic agility. In the second section the study brings forward theory supporting the exploration of an agile internationalization for digital firms, such as virtual markets and ecosystems. The key theoretical forthcomings are summarized into a conceptual framework that combines the role and interplay of entrepreneurs, business models, as well as networks and ecosystems on the basis of strategic agility and dynamic capabilities, that jointly foster an agile and virtual internationalization. Methodology: The interpretive research used an explorative and abductive approach to perform a qualitative multiple case design. The empirical study was based on six Cleantech-as-a-Service companies where in-depth semi-structured interviews were conducted with the informants of significant positions. The thematic and content data analysis supported the identification of common patterns and themes through coding which guided the subsequent analysis chapter. Findings: Our study revealed characteristics and success factors of Cleantech-as-a-Service ventures operating on global volatile markets, which adopt a leagile approach. The findings supported a definition of the concept but also identified the dynamic capabilities and flexible business models leveraged to sustain international competitive agility. The key agile capabilities relate to networking, experimenting, and learning whereas business model characteristics confer resiliency, interdependency, and efficiency.
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Svensson, Andreas, and Tim Zetterberg. "Utvärdering av höjdosäkerheten i digitala höjdmodeller framställda fotogrammetriskt med UAS." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-14822.
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Digitala ytmodeller (Digital Surface Model – DSM) används ofta i geodetiskt sammanhang. DSM har länge skapats bland annat med hjälp av fotogrammetri där flygbilder har tagits med traditionella flygningar. Intresset tilltar nu för att framställa DSM med hjälp av obemannade flygfarkoster, så kallade UAS (Unmanned Aircraft System). Den största fördelen med UAS är att det går snabbt och enkelt att få den lilla flygfarkosten upp i luften för att ta flygbilder och framställa DSM kostnadseffektivt.Syftet med detta examensarbete var att undersöka vilken höjdosäkerhet som kan uppnås i DSM som framställts genom fotogrammetri med UAS. För att åstadkomma detta har två flygningar gjorts den 25 april 2013 med en Gatewing X100 över ett område i Grillby där cirka 350 flygbilder togs sammanlagt. Efter flygningarna mättes med en totalstation 16 kontrollprofiler in på olika terrängtyper över flygområdet enligt rekommendationer i SIS-TS 21145:2007 ”Statistisk provning av digital terrängmodell”.Från de två flygningarna som gjordes i Grillby framställdes två olika DSM i programvaran AgiSoft Photoscan. DSM importerades därefter till SBG Geo där höjdskillnaderna mellan kontrollprofilerna och DSM beräknades. Medelavvikelsen i höjd varierade mellan -0,112 m och 0,050 m för de olika provytorna. De provytor som systematiskt avvek från DSM var asfaltprofilerna, dessa låg konstant (ca 0,1 m) under DSM. Anledningen tros ligga i bildmatchningen i programvaran AgiSoft Photoscan.De DSM som framställdes i detta examensarbete uppfyllde kraven för klass 4 enligt SIS-TS 21144:2007 vilket innebär att max medelavvikelse i höjd får vara 0,15 m. Det innebär, enligt samma SIS-TS, att framställda DSM är lämpade som projekteringsunderlag för arbetsplan väg och systemhandling järnväg (i jämn terräng).Digital Surface Models (DSM) is common used for geodetic measurement today. Digital surface models have been created for a long time using photogrammetry where aerial photographs have been taken with traditional flights. The interest to produce DSM using unmanned air vehicles (UAS) has increased lately. The main advantage of a UAS system is that it is quick and easy to get the little aircraft up in the air to take aerial photographs and produce DSM cost-effective.The aim of this thesis was to investigate the height of uncertainty that can be achieved in DSM created by photogrammetry using UAS. To achieve this two flights have been made the 25th of April 2013 with a Gatewing X100. The flights were made over an area in Grillby where approximately 350 aerial photographs in total were taken. After the flights 16 control profiles were measured with a total station on different terrain types over the flight area as recommended by the document SIS-TS 21145:2007 “Statistical testing of Digital Terrain Models”.From the two flights that were made in Grillby, two different DSM was produced in the software AgiSoft Photoscan. The DSM was imported to SBG Geo and height differences between the control profiles and the DSM were calculated. This resulted in height differences which ranged between -0.112 m and 0,050 m in the various sample surfaces. The sample surface that deviated most from the DSM was the asphalt profiles that deviated about -0.1 m. It was considered to be a systematic error, but the source of the systematic error has not been located among the measurements. The error is believed to instead be in the image matching done by AgiSoft Photoscan. The DSM created in this thesis is classified as class 4 in a table from SIS-TS 21144:2007 which means that the max mean difference in height inside the DSM is ±0,15 m. This shows us that the DSM created with photogrammetry using UAS is suited for both as material for planning in railway and road constructions and for visualization of the ground.
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Krajňák, Tomáš. "Depozice velkých organických molekul v UHV." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-402579.
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In this thesis, large organic molecules (DM15N, DM18N, Cu(dbm)2) were deposited. These molecules are cannot be deposited by thermal sublimation due the fact that they decompose at lower temperature than they sublime. The employed molecules to single molecular magnets, which can be potentially used as quantum bites (qubit). The new method of deposition atomic layer injection made by Bihur Crystal company was introduced and tested. The method uses liquid solution with molecules which is driven by argon gas through pulse valve to the sample placed in ultra-high vacuum chamber. During the deposition, droplets of solution are formed on the sample surface. The solvent can be removed by light annealing or by keeping the sample in the vacuum for couple of days. The molecules were investigated by x-ray photoelectron spectroscopy and by scanning electron microscopy to determine fragmentation of the molecules, to study topography of the resultant surface and homogeneity of the deposited layer. We found conditions at which the intact molecules are deposited on the sample surfaces and form molecular nano- and micro- crystals.
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Pillai, Mahesh R. "The Effect of a 2,2',4,4'-Tetrachlorobiphenyl (PCB 47) and 3,3',4,4'-Tetrachlorobiphenyl (PCB 77) Mixture on Enzymes Involved in the Synthesis of Catecholamines in the Rat Adrenal Gland." Bowling Green, Ohio : Bowling Green State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=bgsu1214235690.
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Abrahamsson, Carin. "De, dem och dom : En studie kring gymnasieelevers användande av de/dem/dom i svenska skriftspråket." Thesis, Jönköping University, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-8691.
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Andersson, Anna. "De, dem och dom: Vilka är dom som vill slopa de och dem? : En granskning av dom-debatten i svensk media och pronomenens användarstatistik." Thesis, Karlstads universitet, Institutionen för språk, litteratur och interkultur, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-47831.
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Denna studie har till syfte att undersöka vilka argument som har förekommit i debatten om de, dem och dom under de senaste tre åren i Sveriges sex största dagstidningar (Dagens Nyheter, Expressen, Göteborgs-Posten, Aftonbladet, Svenska Dagbladet och Sydsvenskan, detta enligt Tidningsutgivarna [TU]). Argumenten hämtas från artiklar via artikelsökverktyget Retriever. I syfte att finna artiklar beträffande dom-debatten testades flertalet olika söksträngar i sökverktygets sökfält. Till sist resulterade söksträngarna och fraserna ”de och dem”, ”de/dem” och ”dom-debatten” i flest träffar. Utifrån ett antal urvalskriterier återstod totalt 26 artiklar. Under motsvarande tidsperiod undersöks även vilket av dessa pronomen som används mest i skrift: talspråksformen dom eller skriftspråksformerna de och dem, med hjälp av Språkbankens konkordansverktyg Korp. Detta för att kunna se ett samband mellan argumenten som förekommer i dagens debatt och det faktiska bruket. Vidare jämförs också resultaten med Språkrådets rekommendation beträffande dessa pronomen. Resultaten i den här studien redovisar alltså temperaturen på debatten i media och pronomenens statistiska användning, som sedan leder till slutsatser om det rådande de/dem/dom-klimatet. Undersökningen visar att de och dem enligt statistik används mer frekvent än dom i skrift. Det kan också konstateras att det förekommer fler argument som stöder ett fortsatt bruk av de och dem i media under de senaste tre åren jämfört med argument som stöder en dom-reform i media under motsvarande period.The aim of this study is to examine arguments that have occurred in the debate concerning de, dem and dom during the past three years in Sweden’s six biggest newspapers (Dagens Nyheter, Expressen, Göteborgs-Posten, Aftonbladet, Svenska Dagbladet och Sydsvenskan, this according to Tidningsutgivarna [TU]). The arguments are collected from articles via the article search tool Retriever. Different search strings were tested in Retriever’s search field in order to find articles regarding the dom-debate. Eventually the search strings and phrases ”de och dem”, ”de/dem” and ”dom-debatten” resulted in most hits. Based on specific selection criteria, 26 articles remained. During the same period of time, the study also set out the examine which of the pronouns that are most used in written language: the informal version dom or the formal version de and dem, using Språkbanken’s concordance tool Korp. In this way, the study demonstrates a connection between the arguments that occur in today’s debate and the actual user statistics. Furthermore, the results are also compared with Språkrådet’s recommendation regarding these pronouns. As such, the results in this study present the debate’s temperature and the pronouns user statistics, which eventually lead to conclusions about the current de-dem-dom-climate. Content analysis of the arguments and user statistics revealed that de and dem are used more frequently than dom in written language. It also concludes there are more arguments supporting a continuing use of de and dem in media during the last three years, compared to arguments supporting a dom-reform during the corresponding period of time.
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Nikula, Harrysson Johanna. "Sär skrivning och andra coola skrivningar bland dom i Nian : En jämförande undersökning av svenska och finlandssvenska elevers skrivande i årskurs 9." Thesis, Uppsala universitet, Institutionen för nordiska språk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-168923.
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Syftet med den här uppsatsen är att undersöka hur väl svenska och finlandssvenska niondeklassare hanterar utvalda svenska skrivregler och det svenska skriftspråket. Vidare undersöks huruvida det finns olikheter länderna emellan, samt mellan kön. Undersökta språkdrag är fyra till antalet: förekomst av särskrivning, hantering av gemener och versaler, inslag av engelska respektive finska samt hantering av pronomina de, dem och dom. Undersökningsmaterialet består av 100 diskursiva elevtexter från Sverige och Finland, jämnt fördelade mellan länderna. Texterna kommer från nationella prov i ämnet svenska (Sverige) respektive modersmål och litteratur (Finland) genomförda våren 2010 av elever i årskurs 9. En kvantitativ forskningsmetod är tillämpad i denna studie; samtidigt är undersökningen även en kvantitativ jämförelse länderna emellan. Resultatet visar att eleverna i stort hanterar undersökta svenska skriftspråksnormer. Det råder dock tveksamheter gällande hur ord skrivs samman på ett korrekt sätt och när ord stavas med stor respektive liten begynnelsebokstav. Främmande ord och uttryck förekommer inte i någon större utsträckning i de undersökta diskursiva texterna. En viss tveksamhet råder även gällande bruket av personliga pronomen i tredje person plural då somliga elever blandar tal- och skriftspråksformer i sina texter samt överanvänder objektsformen. Vid en jämförelse av variabeln kön visar det sig att pojkarna i min studie har fler felaktigheter i sina texter än vad flickorna har. Överlag behärskar de finlandssvenska eleverna undersökta språkdrag med större säkerhet än de svenska eleverna.
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Young, Frederick Kwai. "An investigation into the effects of novel DBM and PAM effectors on catecholamine metabolism and amidation in adrenal chromaffin cell culture : (2) Microbial production of poly-β-hydroxybutyric acid from D-xylose and lactose using pseudomonas cepacia." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/26247.
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Hoang, Thi Minh Phuong Thi minh Phuong. "Optimisation des temps de calculs dans le domaine de la simulation par éléments discrets pour des applications ferroviaires." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20212/document.
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La dégradation géométrique de la voie ballastée sous circulation commerciale nécessite des opérations de maintenance fréquentes et onéreuses. La caractérisation du comportement des pro-cédés de maintenance comme le bourrage, la stabilisation dynamique, est nécessaire pour proposer des améliorations en terme de méthode, paramétrage pour augmenter la pérennité des travaux. La simulation numérique d'une portion de voie soumise à un bourrage ou une stabilisation dynamique permet de comprendre les phénomènes physiques mis en jeu dans le ballast. Toutefois, la complexité numérique de ce problème concernant l'étude de systèmes à très grand nombre de grains et en temps de sollicitation long, demande donc une attention particulière pour une résolution à moindre coût. L'objectif de cette thèse est de développer un outil de calcul numérique performant qui permet de réaliser des calculs dédiés à ce grand problème granulaire moins consommateur en temps. La méthodologie utilisée ici se base sur l'approche Non Smooth Contact Dynamic s(NSCD) avec une discrétisation par Éléments Discrets (DEM). Dans ce cadre, une méthode de dé-composition de domaine (DDM) alliée à une parallélisation adaptée en environnement à mémoire partagée utilisant OpenMP sont appliquées pour améliorer l'efficacité de la simulation numériqueThe track deterioration rate is strongly influenced by the ballast behaviour under commercial traffic. In order to restore the initial track geometry, different maintenance processes are performed, like tamping, dynamic stabilisation. A better understanding of the ballast behaviour under these operations on a portion of railway track is a key to optimize the process, to limit degradationand to propose some concept for a better homogeneous compaction. The numerical simulation isdeveloped here to investigate the mechanical behaviour of ballast. However, the main difficultiesof this research action concerns the size of the granular system simulation increasing both in termof number of grains and of process duration. The purpose of this thesis is to develop an efficient numerical tool allows to realize faster computations devoted to large-scale granular samples. In this framework, the Non-Smooth Contact Dynamics (NSCD) of three-dimensional Discrete ElementMethod (DEM) simulations, improved by Domain Decomposition Method (DDM) and processedwith the Shared Memory parallel technique (using OpenMP) has been applied to study the ballast media mechanics
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Rashid, Sumaya. "Ska det vara de, dem eller dom? : En studie om mellanstadieelevers användning av de, dem, dom i det svenska skriftspråket." Thesis, Södertörns högskola, Lärarutbildningen, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-34052.
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The aim of this study is to examine if pupils in the grades 4 - 6 in one school follow Swedish written language norms. The focus on this study is on the Swedish pronouns de, dem and dom. The English equivalent of de and dem is they and them. In the Swedish language we also have the pronoun dom, that is mostly used in colloquial language. This is interesting because its known that pupils today struggle with differentiating de, dem and dom in the Swedish written language. For example, many pupils use colloquial language dom in written language. There is also an ongoing debate about this topic, which I will go more into later in this study. The reason this research is relevant, is because the last time pupils in middle school years 4 - 6 was examined was in the in the 70’s and as I said there is an ongoing debate about the Swedish pronouns de/dem/dom. One of the things that the debate is about, is whether de and dem should be replaced with the colloquial language form dom. The two questions I used to come to a conclusion are: • What pronoun functions do the pupils have difficulties with? (object, subject etc.) • Does the position of the pronoun in the sentence have an impact on what form the pupils use? (does dem/dem här and dom/dom här occur before or after the verb). To answer these questions, I use two cloze procedures. One from Hallencreutz (1980) and the second one is from Håkansson & Norrby (2003). A total of 66 pupils did the cloze procedures. It was 22 pupils from grades 4, 5 and 6 that engaged in this study. The results show that (46 %) of the pupils used the colloquial language dom in the test. When it comes to pronoun functions, a majority of the pupils (59%) failed on the object function. The results also show that the pupils in my study mixed wrong use of dem/dem här and dom/dom här. Sometimes it was used before the verb, and sometimes after the verb. There was no clear pattern that dem/dem här and dom/dom här came after or before the verb, although it is said that dem/dem här and dom/dom här should appear more often after the verb.
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Hedqvist, Emma, and Daniel Jakobsson. "Uppdatering av nationella höjdmodellen över begränsade områden med hjälp av UAS." Thesis, Högskolan i Gävle, Avdelningen för Industriell utveckling, IT och Samhällsbyggnad, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22073.
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I det här examensarbetet undersöks möjligheten att använda UAS över begränsade områden när den nationella höjdmodellen skapad av Lantmäteriet ska uppdateras. Ämnet var ett förslag från Lantmäteriet och huvudsyftet var att testa om UAS kan användas som komplettering till traditionell flygfotografering. Det blir allt vanligare att använda UAS inom till exempel geomatiken, eftersom det är ett bra verktyg när ett snabbt och effektivt resultat krävs. Lantmäteriet använder flygburen laserskanning vid genereringen av nationella höjdmodellen och den uppdateras med traditionell flygfotografering. Andra aspekter som undersökts i detta examensarbete var vilken mätosäkerhet kan uppnås med UAS vid framställandet av en DHM, vilken skillnad i lägesosäkerhet finns mellan studiens punktmoln jämfört med nationella höjdmodellen, samt mot punktmolnet genererat från traditionell flygfotografering och den ekonomiska aspekten vid användning av UAS. Detta utfördes genom att samla in data med hjälp av UAS över Furuvik, Gävle. Flyghöjden var 88 m över ett område på ca 1 ha. Därefter skapades en höjdmodell som kontrollerades enligt den tekniska specifikationen SIS-TS 21144:2013. I examensarbetet jämfördes punktmolnet som genererades från flygfoton tagna med UAS mot nationella höjdmodellen. Osäkerheten för den genererade höjdmodellen vid användandet av UAS visade ett bra resultat i höjd med en standardosäkerhet på 0,015 m. Punktmolnet genererat från Lantmäteriets bildmatchning låg 0,315-0,392 m under studiens punktmoln medan punktmolnet från laserskanningen låg 0,014-0,155 m över. Resultatet visade att användning av UAS är väldigt kostnadseffektivt när den nationella höjdmodellen över begränsade områden ska uppdateras. Det rekommenderas därför för Lantmäteriet att använda UAS för detta ändamål. Det blir mer än väl godkänt resultat och kostnaden är liten med tanke på resultatet, d.v.s. en metod för att verkligen kunna ajourhålla nationella höjdmodellen och komplettera traditionell flygfotografering över begränsade områden. Med denna metod slipper de vänta på att den traditionella flygfotograferingen ska ske. Tekniken går hela tiden framåt och inom en snar framtid kommer även laserskanning kunna ske med UAS. Det skulle vara intressant att se resultat av den metoden. Intressant skulle även vara att se om det i framtiden går att utesluta flygsignalering och verkligen kunna använda direkt georeferering för att spara tid ute i fält.In this thesis we are going to investigate possibility of using UAS, over small areas, for updating national elevation model produced by the National Land Survey of Sweden. The subject of the thesis was proposed by the National Land Survey of Sweden. One of the main objectives of the study was to test if UAS can be used as a complement to traditional aerial photo. The use of UAS has increased over the years within for example geomatics, because it is a great tool when quick and effective results are required. The National Land Survey of Sweden uses airborne laser scanning to generate the national elevation model. The elevation model is then updated by traditional aerial photogrammetry. Other objectives that have been investigated in this study are what uncertainty can be expected with UAS when generating a DEM, the differences in uncertainty between the point cloud generated in this study to the national height model and to the point cloud generated from the traditional photogrammetry and the economic aspects when using UAS. For this purpose data was collected by UAS in Furuvik, Gävle. The flight height was 88 m over the area of about 1 ha. Then a DEM was created and controlled according to the technical specification SIS-TS 21144:2013. In this thesis a comparison between the point cloud generated in this study and the national elevation model has been performed. Uncertainty of the produced DEM using UAS showed very good result in height with a standard deviation of 0.015 m. The point cloud generated from the traditional photogrammetry was 0.315-0.392 m below the point cloud generated in this study, while the point cloud from laser scanning was 0.014-0.155 m above. The results showed that using UAS are very cost-effective to update the national elevation model. It is advisable for the National Land Survey of Sweden to update the national height model over small areas with this method. There will be more than efficient and the costs are small considering the result. In other word this method is to recommend when updating the national elevation model and can be used as a complement to traditional photogrammetry within limited areas. With this method, they will not have to wait for the traditional aerial photography to take place. The technology is constantly moving forward and in the near future laser scanning with UAS will occur. It would be interesting to see the results of that method. It would also be interesting to see if it is possible to exclude the ground control points, and really be able to use direct georeferencing to save time in the field.
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Šárová, Irena. "Mapování závislostí mezi projekty." Master's thesis, Vysoká škola ekonomická v Praze, 2015. http://www.nusl.cz/ntk/nusl-193935.
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This thesis describes the issue of project dependencies. In managing projects we meet almost every time some kind of dependency. Currently, the project is almost never an isolated group of activity that is able to independently bring same value or result. Therefore, this issue occurs in many areas of managing project. The first theoretical part is focused on some of these areas. It describes disciplines such as Project, Program and Portfolio management. These areas are characterized and then described how they can solve project dependencies. The second part is focused on matrices DSM and DMM, which can serve as one of the methods to effectively manage all connections and dependencies in projects. Area DSM and DMM matrix is first explained and then are expressed its possibilities. In the last part are the information gained in the previous phase applied to a practical example in the banking environment. The method is applied to 25 projects that are guided in an unnamed banking institution. For these projects are set dimensions and are subsequently compiled specific DSM (Dependency Structure Matrix) and DMM (Domain Mapping Matrix) matrices. To certain dimensions is then used clustering method and on the resulting matrix is used simple matrix notation, such as transposition and matrix multiplication. It will create basically a tool, which is a network of all the dependencies between dimensions and projects that can simulate pre-defined scenarios.
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Lindström, Pontus. "Den besvärliga språkriktighetsfrågan om de, dem och dom : En jämförande studie om gymnasieelevers användning av pronomina de, dem och dom i skriftlig produktion." Thesis, Mälardalens högskola, Akademin för utbildning, kultur och kommunikation, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-54660.
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Syftet med denna studie är att undersöka två elevgruppers (gymnasieelever åk 1 och 3) användning av pronomina de, dem och dom i skriftlig produktion för att se om användningen har förändrats och om grammatikundervisning har någon påverkan på den. De datainsamlingsmetoder som använts är dokumentation av 36 redan producerade elevtexter samt en semistrukturerad intervju med elevgruppernas svensklärare. Resultatet visar att elevgruppen i årskurs 3 är generellt säkrare i hanteringen av pronomina de och dem, i synnerhet vid funktionen som personligt pronomen i objektsform samt bestämd artikel. Det kan bero på att de fått en gedigen undervisning om pronomina de och dem vid funktionen som subjekts- och objektsform samt genom den respons läraren ger eleverna i deras skivproduktion. Resultatet tyder på att grammatikundervisning har en verkan på denna förändring som skett mellan grupperna och att lärarens roll är avgörande för elevernas hantering och kunskaper kring pronomina de, dem och dom.
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Poletti, Luca. "Generazione automatica di Modelli Digitali del Terreno da immagini satellitari ad alta risoluzione." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
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La creazione di modelli digitali del terreno o delle superfici attraverso stereocoppie satellitari, è rilevante in molti ambiti ingegneristici, soprattutto quando le zone da rilevare sono inaccessibili o ampie. L’estrazione dei DSM dalle immagini può avvenire per mezzo di processi automatizzati, che giungono a risultati diversi in funzione del tipo di algoritmo utilizzato (e della morfologia dell’area rilevata).
Nell’elaborato sono stati considerati due casi di studio: una zona collinare vicino alla città di Nazca, in Perù (immagini GeoEye-1) e la città di Lisbona, in Portogallo (immagini WorldView-3). Si sono costruiti i loro DSM tramite tre diversi algoritmi automatici implementati nel software ERDAS IMAGINE (eATE, ATE e Tridicon SGM) allo scopo di confrontarli per osservare il comportamento dei modelli individuando le criticità degli algoritmi stessi, e determinando il miglior approccio da impiegare nei tipi di copertura del suolo studiati, attraverso lo studio di adeguate differenze relative e profili verticali.
Dai test effettuati, è possibile asserire che per aree collinari o in assenza di elementi antropici, come per il caso di Nazca, i DSM creati dagli algoritmi di generazione automatica sono confondibili, e le superfici mediamente coincidono. Per le zone densamente urbanizzate come Lisbona, tutti i DSM generati automaticamente presentano rumori ed anomalie notevoli in ampie parti dell’area di studio, soprattutto in corrispondenza di strade e vicoli stretti. Nonostante la loro presenza, il miglior modulo per la generazione di DSM in ambito urbano è risultato il Tridicon SGM poiché permette definire accuratamente i contorni degli edifici.
Non disponendo di punti di controllo a terra non è stato possibile validare i DSM in modo assoluto, ma piuttosto verificata la congruenza interna ed il comportamento in relativo. Una valutazione della loro accuratezza in termini assoluti non era tra gli intenti della ricerca e può essere oggetto di indagini successive.
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Lind, Charlotta. "Är det bara elever som inte kan skilja på de och dem? : En korpusundersökning av sociala medier." Thesis, Uppsala universitet, Institutionen för nordiska språk, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-420933.
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Att många inte kan skilja på när de och dem ska användas är en utbredd uppfattning. Trots detta har bruket av dom, enligt en aktuell studie av Lind Palicki och Karlsson (2019), minskat under 2000-talet. Samtidigt kan man notera att en ny form – de för det (de(t)) – har börjat synas allt mer. Syftet med denna studie är därför att undersöka hur bruket av de/dem/dom/det ser ut i sociala medier. Detta realiseras genom en kvantitativ korpusundersökning baserad på material från bloggar, forumen Flashback och FamiljeLiv samt Twitter, som sedan jämförs med Lind Palicki och Karlssons studie av elevtexter (2019). Resultatet visar att skriftspråksnormerna åtföljs till stor del, samtidigt som formvariationen är större i sociala medier. Formen de(t) verkar vara på uppgång och vid osäkerhet använder många dom trots att de tidigare i underlaget brukat de/dem skriftspråksnormenligt. Det talspråkliga sammanhanget främjar formvariation och att göra sig förstådd verkar enligt min analys anses viktigare än att enhetligt följa skriftspråksnormerna, framförallt när skribenten är osäker på vilken form som är skriftspråksnormenlig.
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Lindesjö, Sofia, and Ellen Ångman. "Hur skriver de? Hur skriver dem? Hur skriver dom? : En undersökning av gymnasieelevers användning av de, dem och dom samt deras attityd till användningen av dessa." Thesis, Högskolan i Gävle, Avdelningen för humaniora, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-24736.
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Syftet med denna uppsats är att belysa gymnasieelevers användning av de, dem och dom samt deras attityder till dessa. Syftet är även att belysa hur svensklärare ställer sig till användandet av de, dem och dom i elevers skoluppgifter samt om de väger in användningen av dessa vid bedömning och betygssättning. I undersökningen medverkar 87 elever i årskurs 3 på gymnasiet samt fyra undervisande svensklärare. Både en kvantitativ och en kvalitativ metod används i undersökningen. Den kvantitativa metoden består av enkäter som delats ut till eleverna och den kvalitativa metoden består av intervjuer med de fyra svensklärarna. Undersökningen visar att 87 % av eleverna anser att de och dem hör till ett korrekt språkbruk. Majoriteten av eleverna anser även att det är viktigt att veta hur man på ett korrekt sätt använder de och dem i skrift. I intervjuerna framkommer det att lärarna anser att eleverna har bristfällig kunskap i hur de och dem ska användas i skrift. Det framkommer även att samtliga lärare väger in användningen av dessa ord i bedömning och betygsättning.
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Rupp, Stephanie. "Modellgeleitete Diagnostik bei kindlichen lexikalischen Störungen [ausgezeichnet mit dem dbl-Forschungspreis]." Idstein Schulz-Kirchner, 2005. http://d-nb.info/988054396/04.
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Kallio, Matilda. "Ska det vara de, dem eller dom? : En språknorm i förändring." Thesis, Högskolan i Gävle, Svenska språket och genusvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-29821.
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Denna studie behandlar hur gymnasielever använder de, dem och dom i de skriftliga delarna av nationella proven i Svenska 1 och 3. Genom en variabelanalys har de, dem och dom beräknats i sammanlagt 120 texter uppdelade i Svenska 1 och 3 samt mellan betygen E-C-A. Därefter har den felaktiga användningen analyserats. Den nästan obefintliga mängden dom i texterna var förvånande. Eleverna verkar skilja på texttyper där skriftspråksformerna de och dem ska användas och när det är godtagbart att använda talspråksformen. Majoriteten elever försöker alltså använda de och dem, även om det inte alltid blir rätt vilket tyder på att de och dem fortfarande har övertaget som språknorm i skriftspråket. Resultatet av undersökningen diskuteras utifrån teoretiska perspektiv gällande språkförändringar, språknormer, språkriktighet, skriftspråk, talspråk samt texttriangeln. Avslutningsvis diskuteras resultatet i ljuset av den långa och nästan ständigt pågående debatten kring vilket eller vilka pronomen som bör användas. Debattörernas åsikter går i tre led: stävan efter enhetligt dom, enhetligt de eller fortsatt användning av de och dem. Majoriteten nämnda debattörer verkar dock överens om att de och dem i framtiden kommer ersättas av dom, en process som kommer pågå under lång tid och är omöjlig att förutspå. Resultatet visar att dom som skriftspråk har en lång väg kvar att gå.
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Lang, Michael. "Internationale Kapitaleinkommensbesteuerung nach dem Wohnsitzprinzip oder dem Quellenprinzip. Eine kritische rechtswissenschaftliche Analyse des in den DBA enthaltenen Quellenprinzips." SFB International Tax Coordination, WU Vienna University of Economics and Business, 2005. http://epub.wu.ac.at/240/1/document.pdf.
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Alm, Malin, and Jasmine Larsson. "Dom skriver rätt, dem skriver fel : En kvantitativ undersökning i felanvändandet av de och dem i text och frågan om talspråk bör tillåtas i skrift." Thesis, Högskolan i Gävle, Avdelningen för humaniora, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-22163.
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I denna uppsats undersöks språkbruket av de/dem/dom hos svenska skolelever i årskurserna 4–6, 8–9 och i olika årskurser inom tre olika gymnasieprogram. 165 elever i grundskolan och gymnasiet har svarat på en enkät utformad för att undersöka kunskapen i distinktionen mellan de/dem. Vi undersöker och diskuterar vad resultaten kan komma att ha för betydelse för användningen av pronomenen och om det skulle vara fördelaktigt att införa ett enhetligt pronomen. Frågan om de och dem borde ersättas av dom har varit en diskussion sedan början av 1900-talet men har blivit än mer ifrågasatt sedan 1950-talet. Frågan diskuteras fortfarande och ännu har ingen lösning eller kompromiss tillämpats. I uppsatsen kommer olika kompromisser som föreslagits att redovisas. I denna uppsats undersöks också vad skolans ansvar är när eleverna ska lära sig de skriftliga normerna, specifikt de/dem och hur språket kan komma att se ut om utbildningen fortsätter som den gör idag.
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Standar, Caroline, and Cornelia Bagler. "De har ingen koll på dem : Ett undervisningsexperiment om de och dem." Thesis, Högskolan i Jönköping, Högskolan för lärande och kommunikation, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-18059.
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SILVA, Wilane Carlos da. "Gerência de Interfaces para Sistemas de Informação: uma abordagem baseada em modelos." Universidade Federal de Goiás, 2010. http://repositorio.bc.ufg.br/tede/handle/tde/530.
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Previous issue date: 2010-04-16Building and maintaining a Graphical User Interface (GUI) for Enterprise Information Systems usually requires much Software Engineering staff time and effort. This paper describes a model-driven approach to create dynamically and manage these GUIs. In this approach, the Software Engineer designs conceptual models of the information system using object-oriented meta-models. A set of predefined mapping rules is applied to automatically transform and refine the conceptual models in order to generate, in runtime, the look and feel of the GUI, without source code creation. This improves the software usability, assuring consistency and homogeneity of the GUI, increases the productivity of the software engineering staff and simplifies maintenance. In our experiments we have observed an average productivity fifteen times higher than traditional methods of GUI development.
Construir e manter uma Interface Gráfica com Usuário (GUI) para Sistemas de Informação (SI) demanda muito tempo e esforço da equipe de Engenharia de Software. Esta dissertação descreve uma abordagem dirigida por modelos para criar dinamicamente e gerenciar essas interfaces. Nessa abordagem, o Engenheiro de Software projeta um modelo conceitual do sistema de informação usando um meta-modelo orientado a objetos. Um conjunto de regras de mapeamento predefinidas é aplicado para refinar e transformar o modelo conceitual do SI, gerando, em tempo de execução, a sua interface gráfica, com aparência e comportamentos específicos. Esse mecanismo melhora a usabilidade do software, assegurando consistência e homogeneidade das GUIs, aumenta a produtividade da equipe de Engenharia de Software e simplifica a manutenção do SI. Nos experimentos realizados foi observada uma média de produtividade quinze vezes maior do que os métodos tradicionais no desenvolvimento de GUIs.
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Al, Maqbali Nasser. "Risk assessment of dams." Title page, contents and abstract only, 1999. http://web4.library.adelaide.edu.au/theses/09ENS/09ensa316.pdf.
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Bibliography: leaves 101-104. Explores risk assessment of dams, a fundamental approach for dam safety measurement, providing a base on which all safety assessment and any appropriate regulation should be developed. Includes an overview of the relevant literature; an example of the application of this method by the South Australia Water Corporation; and it is also applied to the Wadi Al Jizzi Recharge Dam in the Sultanate of Oman. Conclusions and recommendations are presented on the applicability of risk assessment of dams method in the Sultanate of Oman.
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Amandi, Frank Stephan. "Die steuerrechtlichen Beziehungen zwischen der Bundesrepublik Deutschland und Rußland nach dem DBA-Rußland /." Hamburg : Kovač, 2000. http://www.gbv.de/dms/zbw/312102674.pdf.
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Amandi, Frank. "Die steuerrechtlichen Beziehungen zwischen der Bundesrepublik Deutschland und Russland nach dem DBA-Russland /." Hamburg : Kovac, 2000. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=008931678&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Xu, Yao. "Analysis of dam failures and diagnosis of distresses for dam rehabilitation /." View abstract or full-text, 2010. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202010%20XU.
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Lismanis, Brandon. "Numerical Modelling of Dam Breaching." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/24004.
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Until recently, research has been scarce in the field of physical modelling of dam breaching. Over the past few years, teams from the University of Ottawa, Canada, Delft University of Technology, Netherlands, and HR Wallingford, United Kingdom have worked on several physical models to help determine how various dam breaching characteristics vary due to changes in dam geometry and geotechnical properties. The purpose of this project is to use these new experimental data sets to compare and validate the applicability range of two existing pieces of software, MIKE11-DB and BREACH developed by the Danish Hydraulic Institute and National Weather Service, respectively. Several breaching characteristics such as the outflow hydrograph, peak flow, lag time, breaching time, breach width, and water level are considered in the present study. A sensitivity analysis is also performed on the model’s main input parameters and their sensitivity and performance is ranked accordingly.
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Baron, Stefany A. "Cost Trends and Estimates for Dam Rehabilitation in the Commonwealth of Virginia." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/98786.
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In recent years, the United States has seen a high demand for dam rehabilitation projects as most dam infrastructure has started to reach or exceed the expected life span of 50-70 years. Rehabilitation projects can be very expensive, however, and the funding options for dam owners are limited. To raise awareness, organizations such as ASDSO and the Virginia DCR release cost estimates every few years to encourage more investment in dam infrastructure. Unfortunately, many cost estimates have been made with limited data and outdated methodologies. This research collects a new sample of cost data for Virginia dam rehabilitation projects and uses it to assess key factors for cost estimating. Factors such as height, drainage area, hazard classification, and ownership type were used to make regression models that predict the cost of addressing Virginia's non-compliant dams. This study estimates that approximately $300 million is needed to address Virginia's 98 deficient high hazard, local government owned dams and that $122 million of that estimate is need for SWCD dams alone.Master of Science
Dam rehabilitation refers to the repair, removal, or upgrade of an existing dam structure. Rehabilitation projects are done when dams start to exceed their intended life span (approximately 50-60 years) or when policy makers change the required safety standards. The demand for dam rehabilitation has been increasing for the past several years as more and more dams are being identified as unsafe, but the available funding for rehabilitation projects is limited and competitive to obtain for dam owners. To raise awareness, dam safety agencies release cost estimates every few years to encourage government leaders and the general public to take action. However, these estimates need to be taken with caution as they are often made with limited data availability and outdated methodologies. This research collects a new sample of cost data for Virginia dam rehabilitation projects that have occurred in the last 15 years. Dam characteristics such as height, watershed size, downstream risk potential, and ownership type were used to form equations that predict the cost of addressing Virginia's non-compliant dams. This study estimates that approximately $300 million is needed to address Virginia's 98 deficient high hazard, local government owned dams and that $122 million of that estimate is need for Virginia's Soil and Water Conservation District dams alone.
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Udamulla, K. M. Lakshika Ayomi. "Engineering assessment of the safety of existing dams." Thesis, Hong Kong : University of Hong Kong, 1997. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18565323.
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