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Grau, Yegros Ilse. "Tape Mbo'e: A Service Oriented Method." Doctoral thesis, University of Trento, 2015. http://eprints-phd.biblio.unitn.it/1430/2/ILSE-GRAU-THESIS.pdf.
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In developing countries, normally, different e-government applications do not exchange data each other, affecting the quality of service provided to citizens and the transparency.
This situation has motived us to focus on the development of applications in such domain and, more specifically, on the interoperability among these applications. The interoperability has been implemented in e-government context of multiple countries through the Service-Oriented Computing (SOC). In addition to the interoperability, SOC provides considerable benefits. However, developing a service-based e-government application (SBeA) is a complex challenge and requires a software engineering method to manage its development process. The potential method should take into account not only design, construction, and maintenance of SBeA, but also it should consider the context in which it will be used (i.e, developing countries).
In fact, in these countries, the scarcity of economic resources and qualified professionals can impose constraints to carry out e-government projects.
Thus, the adopted methods have to maintain the costs low and to consider aspects related to long-term sustainability of the applications from the beginning. These issues suggest the adoption of Agile Methods (AMs) that have been proved to offer benefits in different projects in developing countries. However, they do not include SOC characteristics. Therefore, we have proposed Tape Mbo'e (TME), that is an extension of the agile method "OpenUP" to support the construction and the maintenance of SBeA in developing countries.
TME has been used in five case studies, which embraced both academia and public organizations in Paraguay. It is important to remark that it was the first application of this type of evaluation in the public sector in Paraguay.
A full validation of TME requires a long-term study, including its applications in a consistent number of e-government projects. This is out of the scope, and the possibility, of the current thesis. Nevertheless, the initial results of the different case studies indicate the feasibility and simplicity of TME when it is applied in this context.
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Raihen, Nurul. "Convergence Rates for Hestenes' Gram-Schmidt Conjugate Direction Methodwithout Derivatives in Numerical Optimization." University of Toledo / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1494608232437057.
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Skan, Moa. "Reconstructing ICMEs with the toroidal Grad-Shafranov method." Thesis, Uppsala universitet, Institutet för rymdfysik, Uppsalaavdelningen, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-382398.
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The main objective of this thesis is to model the magneticstructure of interplanetary coronal mass ejections (ICME) measuredin-situ from the WIND spacecraft positioned at L1. The modeling isdone by a magnetohydrodynamic reconstruction technique based onthe GS equation with a toroidal geometry. The purpose has been toextend the application of the reconstruction program to real dataand to test its performance when different input parameters arechanged. Two events are presented; 16-17 May 2012 and 15-16 May2005 ICMEs have been successfully reconstructed with this model. The main achievements of the study are that a) the code now worksfor real data b) the important parameters that can be changed fordifferent reconstructions in the code are the number of iterationsused to find the optimal Z-axis, the plasma pressure and the orderof the polynomial fitting of the flux functional, c) if all crosssection reconstructions for different variations of theseparameters strongly resembles each other then this is anindication that the model approximation is good and that the fluxrope exists. The results have been compared and verified withpreviously published studies of these events. Using a toroidal geometry for the GS reconstruction method weobtain very similar results to the one obtained with differentreconstruction techniques.This implies that at L1, the ICMEs haveexpanded so much that a cylindrical geometry is sufficient todescribe the flux rope geometry. The toroidal Grad-Shafranovreconstruction technique is best suited for circular, or slightlyelongated, flux rope cross section profiles but have been provento work for one complex ejecta consisting of two merged fluxropes. The toroidal model might become an important asset in thefuture when data from spacecraft closer to the Sun, such as ParkerSolar Probe and Solar Orbiter, is public. When the major radius ofthe flux rope is smaller the choice of geometry will most likelyhave a larger role than for measurements at L1 and so, thetoroidal Grad-Shafranov reconstruction technique will probably bethe better alternative of the models that exists today.
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Borivoj, Subotić. "Grafovske metode u geometriji i geometrijske metode u grafovima." Phd thesis, Univerzitet u Novom Sadu, Prirodno-matematički fakultet u Novom Sadu, 2005. https://www.cris.uns.ac.rs/record.jsf?recordId=73402&source=NDLTD&language=en.
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U prvoj glavi dat je prikaz osnovnih pojmova koji se koriste u tezi, sa naglaskom na osnovne pojmove teorije grafova. U drugoj glavi daju se grafovski dokazi nekih geometrijskih problema. Na primer, dajemo dokaz poznate teoreme Silvestra. iz Kombinatorne geometrije, koristeći grafove. Treće poglavlje sadrži neke geometrijske dokaze u grafovima. Na primer, poznatu Turanovu teoremu, Pikovu teoremu i drugo. U četvrtom poglavlju dajemo metodičku transformaciju prethodnih problema. Neki od problema razloženi su na delove koji se mogu prezentirati od osnovne škole do poslediplomskih studija. Peto poglavlje sadrži komentare prethodnog, kao i preporuku UNESCO-a iz 1992. godine o obrazovanju učenika u novom milenijumu.<br>Chapter 1 contains a shoot review of the basic notions which are used in the thesis with emphasis on the basic notions of graph theory. In Chapter 2we present graph proofs of some geometrical problems. For example, we present some proofs of the well known theorem of Sylvester, from Combinatorial geometry, using graph methods. In Chapter 3 we present some proofs in graphs which use geometry. For example, famous Turan’s theorem, Pick’s theorem and some others. Chapter 4 contains methodology transformations i.e. we apply the results from the previous chapters to the situations in the clossroom. In Chapter 5 we have some comments of UNESCO, from 1992, on education of children.
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Adolfsson, Stefan. "Quality monitoring in pulsed GMA welding using signal processing methods." Licentiate thesis, Luleå tekniska universitet, 1995. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-18082.
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Wiggins, Benjamin. "Wronskian and Gram Solutions to Integrable Equations using Bilinear Methods." ScholarWorks @ UVM, 2017. http://scholarworks.uvm.edu/graddis/751.
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This thesis presents Wronskian and Gram solutions to both the Korteweg-de Vries and Kadomtsev-Petviashvili equations, which are then scalable to arbitrarily large numbers of interacting solitons.
Through variable transformation and use of the Hirota derivative, these nonlinear partial differential equations can be expressed in bilinear form. We present both Wronskian and Gram determinants which satisfy the equations.
N=1,2,3 and higher order solutions are presented graphically; parameter tuning and the resultant behavioral differences are demonstrated and discussed. In addition, we compare these solutions to naturally occurring shallow water waves on beaches.
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Gajic, Ruzica, and Isabelle Söder. "Arbetslöshetsförsäkringens finansiering : Hur påverkas arbetslöshetskassornas medlemsantal av en förhöjd grad av avgiftsfinansiering?" Thesis, Uppsala University, Department of Economics, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-126711.
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<p>Sedan årsskiftet 2006/2007 har antalet medlemmar i arbetslöshetskassorna minskat drastiskt. Under samma period har ett flertal reformer genomförts på arbetslöshetsförsäkringens område som bland annat resulterat i höjda medlemsavgifter för de flesta a-kassorna. Syftet med denna uppsats är att undersöka huruvida det över tid går att finna något samband mellan förändringar i medlemsantal och medlemsavgifter. För att undersöka detta måste man förutom avgifterna även ta hänsyn till andra variabler kopplade till arbetslöshetsförsäkringen. Dessa övriga variabler är grundbelopp, högsta dagpenning, ersättningsgrad och arbetslöshet. Vi formulerar en modell för sambandet mellan medlemsantal och dessa variabler och skattar denna genom metoden Generalized Method of Moments med hjälp av data från 2000-2009. Våra resultat visar i enlighet med teori och tidigare forskning på ett negativt samband mellan medlemsavgifter och antalet medlemmar i a-kassan. Detta samband visar sig vara starkt, särskilt på lång sikt. För att tydigare se hur avgiftsförändringar påverkar olika typer av individer i olika grad har vi även undersökt huruvida medlemsantalet i a-kassor kopplade till tjänstemanna- respektive arbetarförbund är olika känsliga för förändringar i avgiften. Våra resultat visar i kontrast till tidigare studier att a-kassorna kopplade till tjänstemannaförbunden (TCO och Saco) är mer känsliga för förändringar jämfört med arbetarförbunden (LO). Detta skapar anledning att tro att det finns andra faktorer än avgifter och de övriga variablerna som inkluderats i vår modell vilka påverkar anslutningsgraden och som kan förklara skillnaden mellan de olika grupperna.</p>
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Comas, Lou Enric. "Application of the generalized rank annihilation method (GRAM) to second-order liquid chromatographic data." Doctoral thesis, Universitat Rovira i Virgili, 2005. http://hdl.handle.net/10803/8995.
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Les mesures analítiques i els instruments que les generen poden classificar-se en funció del numero de dades que s'obtenen al mesurar una mostra. Si s'obté una matriu de respostes, s'anomenen dades d'ordre dos.<br/>En aquesta tesi es van utilitzar els dades d'ordre dos, obtingudes mitjançant un cromatògraf líquid d'alta resolució amb un detector de diodes en fila (DAD).<br/>L'instrument HPLC-DAD és força comú. Tot i això, normalment, per determinar la concentració dels analits d'interès no s'utilitzen totes les dades enregistrades per l'instrument. El mode espectral només s'utilitza per identificar els analits o per verificar la puresa dels pics, mentre que l'àrea o l'alçada del pic s'utilitza per quantificar mitjançant calibratge univariant. Aquesta manera de treballar és molt útil sempre i quan la resposta mesurada sigui selectiva per l'analit d'interès.<br/>En analitzar contaminants ambientals en mostres complexes, com poden ser mostres d'aigua de riu, no és senzill obtenir mesures selectives. Quan les respostes no son selectives, els mètodes de calibratge de segon ordre (els que utilitzen dades de segon ordre) es poden utlitzar per a quantificar l'analit d'interès.<br/>La present tesi es basa en l'estudi de les propietats del mètode de calibratge de segon ordre Generalized Rank Annihilation Method (GRAM). Aquest mètode fou desenvolupat a mitjans de la dècada dels 80, i té unes propietats molt atractives:<br/>1) Per a determinar la concentració de l'analit d'interès en una mostra test només cal una mostra de calibratge o estàndard.<br/>2) No calen mesures selectives, amb la qual cosa el temps de la separació es pot reduir de manera considerable.<br/>Tot i això, el GRAM té una sèrie de limitacions que fan que no s'apliqui de manera rutinària. L'objectiu de la tesi és estudiar els avantatges i les limitacions del GRAM i millorar els aspectes necessaris per a què és pugui aplicar de manera rutinària.<br/>Per emprar GRAM les dades experimentals han de complir una sèrie de requisits matemàtics: (i) la resposta mesurada ha de ser suma de respostes corresponents als diferents analits i (ii) la resposta d'un analit ha de ser proporcional en les diferents mostres: l'analit ha d'eluir exactament al mateix temps de retenció tant en l'estàndard com en la mostra test. Si aquest requisit no es compleix, les prediccions del GRAM son esbiaixades.<br/>S'han desenvolupat fórmules de superar aquestes dificultats. S'ha desenvolupat un mètode per alienar pics cromatogràfics, basat en un mètode de resolució de corbes (Iterative Target Transformation Factor Analysis, ITTFA). En sistemes HPLC-DAD, és força habitual que els pics de l'analit d'interès elueixin a diferents temps de retenció.<br/>Les diferencies no son gaire grans (pocs segons) però poden ser suficients per fer que els resultats del GRAM siguin incorrectes.<br/>El GRAM és un mètode basat en factors, i cal introduir aquest paràmetre per a calcular un model. S'ha desenvolupat un mètode gràfic per a triar el nombre de factors que s'utilitzen per calcular el model GRAM. Està basat en un paràmetre de l'algorisme GRAM (á).<br/>Finalment s'ha desenvolupat un criteri per a determinar mostres discrepants (outliers).<br/>El criteri desenvolupat per detectar outliers està basat en el Senyal Analític Net (NAS).<br/>Tot l'esmentat anteriorment, s'ha aplicat a casos reals, en concret a l'anàlisi de naftalensulfonats i de contaminats polars presents en mostres d'aigua, tant de riu com de depuradora. Així s'ha pogut demostrar la utilitat del GRAM a la cromatografia, i comparar el GRAM amb altres mètodes de calibratge de segon ordre com el PARAFAC i MCR-ALS. Es va trobar que tots tres mètodes produïen resultats comparables.<br>Analytical measurements and the instruments that generate them can be classified regarding the number of data that are obtained when a sample is measured. When a matrix of response is obtained, it is known as second-order data.<br/>In this thesis, second-order data were used, obtained from a high performance liquid chromatography (HPLC) couple with a diode array detector (DAD). This instrument is quite common in the analytical laboratories. However, the concentration of the analytes of interest is normally found without using all the measured data. The spectral model only is used to identify the analytes of for verifying the peak purity, whereas the area or the height of the peak is used to quantify using univariate calibration. This is a very useful strategy. However, the measured response must be selective to the analyte of interest.<br/>When environmental pollutants were analyzed, like water samples, it is no so easy to get selective measurements. When the responses are not selective, the analyte on interest can still be quantified by using second-order calibration methods, which are the methods that use second-order data.<br/>This thesis is based on the study of the properties of the second-order calibration method Generalized Rank Annihilation Method (GRAM).<br/>This method was developed in the mid eighties and has very attractive properties:<br/>1) To determine the concentration of the analyte of interest in a test sample, it is only necessary one calibration sample or standard.<br/>2) Selective measurements are not necessary, implying the reduce of the separation time.<br/>Despite these advantages, GRAM has some limitations which make that it is not applied routinely. The objectives of the thesis are to study the advantages and limitations of GRAM and improve the negative points in order to apply GRAM routinely.<br/>To use GRAM the experimental data must accomplish some mathematical requirements: (i) the measured response must be result of the addition due to the different analytes in the peak and (ii) the response of the analyte must be proportional in the different samples: the analyte of interest must elute at the same retention time both in the calibration and in the test sample. When these conditions are not met, the GRAM predictions are biased.<br/>Mathematical algorithms have been developed to overcome such difficulties. An algorithm to align chromatographic peaks has been developed, based on curve resolution method (Iterative Target Transformation Factor Analysis, ITTFA). In HPLCDAD systems is quite often that the peaks of the analyte of interest elute at different retention time in the calibration and in the test sample. Even the differences are not big (few seconds), they can be enough to make the GRAM results incorrect.<br/>GRAM is a factor based calibration method, and the number of factors has to be introduced as an input to build a GRAM method. A graphical criterion has been selected to determine the number the number of factors, which is base on the use of a parameter of the GRAM algorithm (á).<br/>Finally, a criterion to detect outlying samples has been developed, which is based on the Net Analyte Signal (NAS).<br/>All the above commented were applied to real cases. Specifically to the analysis of aromatic sulfonates and polar pollutants in water form river samples and waste water plants. We were able to show the applicability of GRAM and to compare GRAM with other second-order calibration methods, such as PARAFAC i MCR-ALS. We found that the three methods provided comparable results.
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Mikhailov, I. F., A. A. Baturin, Ye A. Bugaev, A. I. Mikhailov, and S. S. Borisova. "Metal Films as Mass Standard Samples in the Nano-Gram Range." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35167.
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Attestation of magnetron sputtered films as mass standards is presented. Homogeneous, long-lived
metal films were measured by different methods for comparison. The accuracy of the order 1 ng was found
to be provided by application of the metal film standards for element analysis by X-ray fluorescent method.
Keywords: Thin Films, Nano-Standards, Magnetron Sputtering, X-ray Reflectometry, X-ray Fluorescent
When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35167
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Glassford, Eric. "Comparison of Grab, Air, and Surface Results for Radiation Site Characterization." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1307442130.
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Abdul, Rahman Muhammad Razi. "High order finite elements for microsystems simulation." Göttingen Cuvillier, 2008. http://d-nb.info/99078942X/04.
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Cayan, Fatma Nihan. "The Method Of Lines Solution Of Discrete Ordinates Method For Nongray Media." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607401/index.pdf.
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A radiation code based on method of lines (MOL) solution of discrete ordinates method (DOM) for the prediction of radiative heat transfer in nongray absorbing-emitting media was developed by incorporation of two different gas spectral radiative property models, namely wide band correlated-k (WBCK) and spectral line-based weighted sum of gray gases (SLW) models.
Predictive accuracy and computational efficiency of the developed code were assessed by applying it to the predictions of source term distributions and net wall radiative heat fluxes in several one- and two-dimensional test problems including isothermal/non-isothermal and homogeneous/non-homogeneous media of water vapor, carbon dioxide or mixture of both, and benchmarking its steady-state predictions against line-by-line (LBL) solutions and measurements available in the literature. In order to demonstrate the improvements brought about by these two spectral models over and above the ones obtained by gray gas approximation, predictions obtained by these spectral models were also compared with those of gray gas model. Comparisons reveal that MOL solution of DOM with SLW model produces the most accurate results for radiative heat fluxes and source terms at the expense of computation time when compared with MOL solution of DOM with WBCK and gray gas models.
In an attempt to gain an insight into the conditions under which the source term predictions obtained with gray gas model produce acceptable accuracy for engineering applications when compared with those of gas spectral radiative property models, a parametric study was also performed. Comparisons reveal reasonable agreement for problems containing low concentration of absorbing-emitting media at low temperatures.
Overall evaluation of the performance of the radiation code developed in this study points out that it provides accurate solutions with SLW model and can be used with confidence in conjunction with computational fluid dynamics (CFD) codes based on the same approach.
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Graf, Kateryna Verfasser], Michael [Akademischer Betreuer] [Herty, and Martin [Akademischer Betreuer] Bücker. "Optimization methods for mathematical models for geophysical flows / Kateryna Graf ; Michael Herty, Martin Bücker." Aachen : Universitätsbibliothek der RWTH Aachen, 2021. http://d-nb.info/1238791239/34.
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Staehle, Barbara [Verfasser], and Phuoc [Akademischer Betreuer] Tran-Gia. "Modeling and Optimization Methods for Wireless Sensor and Mesh Networks / Barbara Staehle. Betreuer: Phuoc Tran-Gia." Würzburg : Universitätsbibliothek der Universität Würzburg, 2011. http://d-nb.info/1014932785/34.
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D'AGOSTINO, TOMMASO. "Enhanced sampling methods and their application in the study of molecular permeation in gram-negative bacteria." Doctoral thesis, Università degli Studi di Cagliari, 2016. http://hdl.handle.net/11584/266673.
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Antimicrobial resistance is inhibiting our ability to fight against pathogens. By selectively changing the composition and expression of influx water-filled proteins filling their outer membrane, gram- negative bacteria are able to reduce the rates at which specific polar compounds are able to permeate. A clear comprehension of the mechanism determining substrates diffusion through these pores is still missing. In this thesis, we show how biased computer simulations may offer a unique perspective in the study of molecular permeation through porins, overcoming the intrinsic limitations of both experimental techniques and standard molecular dynamics. The first test-case is Acinetobacter baumannii’s CarO. The use of substrates with varying charge and molecular weight, as well as the creation of a loop-less mutant missing the extracellular domain of the protein, allowed to determine the charge selectivity and the transition rates of polar molecules. We obtained good agreement with the results of liposome swelling assays experiments. Further, we compared the passage of two carbapenem antibiotics in a series of mutated proteins extracted from a patient undergoing long term hospital infection. We connected the mutation of few key residues to a drastic change in the internal electric field of the proteins, showing that the antibiotics follow the choreography of water molecules inside the channels. In the last section, we present a kinetic model that allows to determine for a molecule the relative probability of different conformations and the time required for the translocation through a pore. This approach allowed to connect the results of enhanced sampling MD methods with current blockages in single channel experiments.All these results together show that multiscale MD techniques can offer an exhaustive view on the mechanism of molecular diffusion through pores, helping to understand the most important charac- teristics that determine the rates of translocation of different com- pounds in gram-negative bacteria. We can use these data to com- plement experimental results and to design the next generation of antibiotics.
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Lee, Jennifer. "A Mixed-methods Study Investigating the Relationship Between Media Multitasking Orientation and Grade Point Average." Thesis, University of North Texas, 2012. https://digital.library.unt.edu/ark:/67531/metadc177221/.
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The intent of this study was to examine the relationship between media multitasking orientation and grade point average. The study utilized a mixed-methods approach to investigate the research questions. In the quantitative section of the study, the primary method of statistical analyses was multiple regression. The independent variables for the study were media multitasking orientation, gender, age, and income. The dependent variable for the study was grade point average. Three out of four independent variables, namely, media multitasking orientation, gender and age were statistically significant predictors of grade point average. In the qualitative section of the study, seven participants were interviewed to determine how individual differences in media multitasking orientation manifest themselves in academic settings.
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Niepel, Tanja. "Chemotaxonomie ausgewählter Gram-positiver Bakterien anhand ihrer polaren Lipide, Sequenzierung ihrer 16S rDNAs und Vergleich beider Methoden." [S.l. : s.n.], 1999. http://www.gbv.de/dms/bs/toc/300316259.pdf.
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Salvati, Roberto. "Development of Magnetic Resonance Imaging (MRI) methods for in vivo quantification of lipids in preclinical models." Thesis, Rennes 1, 2015. http://www.theses.fr/2015REN1B026/document.
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L'obésité est associée à une augmentation de la morbidité et de la mortalité liée à de nombreuses maladies, y compris le diabète de type 2, l'hypertension et des pathologies hépatiques menant à une surcharge lipidique d’origine non alcoolique. Récemment, l’imagerie par résonance magnétique (IRM) est devenue la méthode de choix pour la quantification non invasive de la graisse. Dans cette thèse, les méthodes d'IRM ont été étudiées sur un scanner préclinique de 4.7T in vitro (fantômes MR) et in vivo (souris). Deux algorithmes de quantifications de la graisse -la méthode de Dixon et l’algorithme IDEAL- ont été considérés. Les performances de l'algorithme IDEAL ont été analysées en fonction de propriétés des tissus (T2*, fraction de graisse et modèle spectral de la graisse), de paramètres d'acquisition IRM (temps d’écho, nombre d'échos) et de paramètres expérimentaux (SNR et carte de champ). Sur les fantômes, l'approche standard single-T2* IDEAL a montré certaines limites qui pourraient être surmontées en optimisant le nombre d'échos. Une nouvelle méthode, pour déterminer les valeurs de vérité terrain pour T2* de l'eau et pour T2* de la graisse, a été proposée. Pour les mesures in vivo, différentes analyses ont été effectuées en utilisant l'algorithme IDEAL sur le foie et les muscles. L'analyse statistique sur les mesures de ROI a montré que le choix optimal du nombre d'échos est égal à trois pour la quantification de la graisse et six ou plus pour la quantification du T2*. Les valeurs de la fraction de graisse, calculées avec l'algorithme IDEAL, étaient statistiquement comparables aux valeurs obtenues avec la méthode de Dixon. Enfin, un procédé pour générer des signaux de référence mimant les systèmes eau-graisse (Fat Virtual Phantom MRI), sans l'aide d'objets physiques, a été proposé. Ces fantômes virtuels, qui présentent des caractéristiques de bruit réalistes, représentent une alternative intéressante aux fantômes physiques pour fournir un signal de référence dans les mesures IRM<br>Obesity is associated with increased morbidity and mortality linked to many diseases, including type 2 diabetes, hypertension and disease nonalcoholic fatty liver. Recently, 1H magnetic resonance imaging (MRI) has emerged as the method of choice for non-invasive fat quantification. In this thesis, MRI methodologies were investigated for in vitro (MR phantoms) and in vivo (mice) measurements on a 4.7T preclinical scanner. Two algorithms of fat quantifications – the Dixon’s method and IDEAL algorithm – were considered. The performances of the IDEAL algorithm were analyzed as a function of tissue properties (T2*, fat fraction and fat spectral model), MRI acquisition parameters (echo times, number of echoes) and experimental parameters (SNR and field map). In phantoms, the standard approach of single-T2* IDEAL showed some limitations that could be overcome by optimizing the number of echoes. A novel method to determine the ground truth values of T2* of water and T2* of fat was here proposed. For in vivo measurements, different analyses were performed using the IDEAL algorithm in liver and muscle. Statistical analysis on ROI measurements showed that the optimal choice of the number of echoes was equal to three for fat quantification and six or more for T2* quantification. The fat fraction values, calculated with IDEAL algorithm, were statistically similar to the values obtained with Dixon’s method. Finally, a method for generating reference signals mimicking fat-water systems (Fat Virtual Phantom MRI), without using physical objects, was proposed. These virtual phantoms, which display realistic noise characteristics, represent an attractive alternative to physical phantoms for providing a reference signal in MRI measurements
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Leung, Po-shan. "In silico analysis of 16S ribosomal RNA gene sequencing based methods for identification of medically important Gram-positive cocci /." View the Table of Contents & Abstract, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38348159.
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胡國良 and Kwok-leung Wu. "In silico analysis of 16S ribosomal RNA gene sequencing based methods for identification of medically important Gram-positive rods." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2008. http://hub.hku.hk/bib/B40721802.
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Leung, Po-shan, and 梁寶珊. "In silico analysis of 16S ribosomal RNA gene sequencing based methods for identification of medically important Gram-positive cocci." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B45011382.
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Wu, Kwok-leung. "In silico analysis of 16S ribosomal RNA gene sequencing based methods for identification of medically important Gram-positive rods." Click to view the E-thesis via HKUTO, 2008. http://sunzi.lib.hku.hk/hkuto/record/B40721802.
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Graf, Bernd [Verfasser]. "Validierung von Methoden zur Berechnung und Reduzierung der Schallabstrahlung von Getriebegehäusen / von Bernd Graf." Ilmenau : Univ.-Verl, 2007. http://d-nb.info/997479612/34.
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Zajíc, Jiří. "Modern Methods for Tree Graph Structures Rendering." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2013. http://www.nusl.cz/ntk/nusl-412891.
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Tento projekt se věnuje problematice zobrazení velkých hierarchických struktur, zejména možnostem vizualizace stromových grafů. Cílem je implementace hyperbolického prohlížeče ve webovém prostředí, který využívá potenciálu neeukleidovské geometrie k promítnutí stromu na hyperbolickou rovinu. Velký důraz je kladen na uživatelsky přívětivou manipulaci se zobrazovaným modelem a snadnou orientaci.
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Latinović, Milena [Verfasser]. "A method for validation of GIA models using sea-level data with applications to Hudson Bay and SW Fennoscandia / Milena Latinović." Berlin : Freie Universität Berlin, 2021. http://d-nb.info/1230407367/34.
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Ameen, Shafeeq Aqeel. "A Mixed Methods Study of the Air Force Jrotc Leadership Program at an Urban High School in Southeastern Virginia." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/29473.
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The JROTC program is one of service and commitment. Its mission is to build better citizens and give them a sense of pride in service to their fellow man. Today these core principles are still needed, but with the increase in the student dropout rate, the JROTC program can be one of many alternatives needed to help public education reach today's youth who are struggling to stay in school.
The purpose of this mixed methods study was to examine the impact of the Air Force JROTC Leadership Program on the grade point average (GPA), attendance rate, disciplinary referrals, and dropout rate of JROTC students at an urban high school in southeastern Virginia. The study also addressed the perceptions of school administrators, Air Force JROTC instructors, teachers, JROTC students and their parents on students enrolled in the program during the 2005-2009 school years.
Descriptive statistics were used to determine the means, standard deviations and frequency distributions for the groups in the study. Three independent sample t-tests and seven one-way Analysis of Variance (ANOVA's) were used to determine where there was a statistically significant difference for each group. The Tukey post hoc procedure was used to determine where the difference occurred in the variables.
There were three major findings revealed in this study. The first finding indicated that students who participated in the JROTC program had lower grade point averages (M =2.47, SD = 1.17) than non-JROTC participants (M = 3.00, SD = 0.94). Second, administrators had higher levels of agreement (100%) than AFJROTC instructors, teachers, JROTC students and parents that leadership skills were developed in the AFJROTC program. Third, JROTC students (12%) and parents (7%) had lower levels of agreement than administrators, AFJROTC instructors and teachers that the AFJROTC program is used as a recruitment tool.
Focus groups results showed strong support for the program from administrators, teachers, JROTC students and parents. These findings suggest that if school districts and educational leaders are to benefit from implementing the AFJROTC program they must understand that the program is not designed to impact academics. The program is designed to develop leadership skills along with helping students become better citizens. Educational leaders in school districts should read the findings and consider utilizing the program as a possible alternative to help students to develop skills to keep them from dropping out of school.<br>Ph. D.
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Jebakumar, Naomi. "Development of in vitro infection model methods for Gram-negative bacteria to assess potential broad-spectrum anti-virulence inhibitors." Thesis, Jebakumar, Naomi (2015) Development of in vitro infection model methods for Gram-negative bacteria to assess potential broad-spectrum anti-virulence inhibitors. Honours thesis, Murdoch University, 2015. https://researchrepository.murdoch.edu.au/id/eprint/31251/.
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Bacteria exhibit common virulence targets which can be inhibited for potential broad-spectrum activity across a range of bacterial infections. The macrophage infectivity potentiator (Mip) is a bacterial protein that has peptidylprolyl cis/trans isomerase activity and is part of the FK506-binding protein subgroup, in the superfamily of immunophilins. They have previously been identified to be involved in intracellular virulence of Legionella pneumophila and Burkholderia pseudomallei and inhibition of the protein with pipecolic acid derived small-molecule inhibitors resulted in a decrease in virulence. Due to the highly conserved nature of Mip proteins it is believed that these proteins exist in Klebsiella pneumoniae and Burkholderia cenocepacia; two pathogens contributing to a rise in multi-drug resistant infections. Therefore, this study aims to examine the potential broad-spectrum activity of the Mip inhibitors in K. pneumoniae and B. cenocepacia by developing in vitro model methods for inhibitor evaluation.
The presence of putative Mip proteins in K. pneumoniae and B. cenocepacia were confirmed with the use of online bioinformatics tools. The Mip inhibitors were then examined by first developing in vitro cell based methods to identify the magnitude at which K. pneumoniae and B. cenocepacia adhered to macrophages, and internalised, survived and replicated within the macrophages. An optimised adherence assay, and internalisation, survival and replication assay were then used to test the efficacy of the Mip inhibitors in K. pneumoniae and B. cenocepacia.
The results obtained demonstrated that K. pneumoniae and B. cenocepacia were able to adhere to the macrophages, however, the concentration at which they adhered varied between strains. Only two strains of K. pneumoniae were internalised into the macrophages and only one strain was able to replicate at low concentrations within the macrophages during the 24 hours post-infection. All strains of B. cenocepacia were internalised into the macrophages, however, only one strain suggested replication within the macrophages during the 24 hours post-infection. The Mip inhibitors had little effect on adherence of K. pneumoniae to macrophages, however, trends in the data suggested that the Mip inhibitors had an effect on the intracellular virulence of K. pneumoniae and B. cenocepacia. Therefore from this preliminary study, it seems that Mip inhibitors have potential broad-spectrum activity in intracellular virulence of these pathogens. These findings provide insight into Mip proteins in K. pneumoniae and B. cenocepacia and the potential they have as common bacterial drug targets.
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Tran-Gia, Johannes [Verfasser], Herbert [Gutachter] Köstler, Christian [Gutachter] Ritter, Dietbert [Gutachter] Hahn, and Meinrad [Gutachter] Beer. "Model-Based Reconstruction Methods for MR Relaxometry / Johannes Tran-Gia. Gutachter: Herbert Köstler ; Christian Ritter ; Dietbert Hahn ; Meinrad Beer." Würzburg : Universität Würzburg, 2015. http://d-nb.info/1111783500/34.
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Yus, Diego. "Long-term vehicle movement prediction using Machine Learning methods." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-233556.
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The problem of location or movement prediction can be described as the task of predicting the future location of an item using the past locations of that item. It is a problem of increasing interest with the arrival of location-based services and autonomous vehicles. Even if short term prediction is more commonly studied, especially in the case of vehicles, long-term prediction can be useful in many applications like scheduling, resource managing or traffic prediction. In this master thesis project, I present a feature representation of movement that can be used for learning of long-term movement patterns and for long-term movement prediction both in space and time. The representation relies on periodicity in data and is based on weighted n-grams of windowed trajectories. The algorithm is evaluated on heavy transport vehicles movement data to assess its ability to from a search index retrieve vehicles that with high probability will move along a route that matches a desired transport mission. Experimental results show the algorithm is able to achieve a consistent low prediction distance error rate across different transport lengths in a limited geographical area under business operation conditions. The results also indicate that the total population of vehicles in the index is a critical factor in the algorithm performance and therefore in its real-world applicability.<br>Lokaliserings- eller rörelseprognosering kan beskrivas som uppgiften att förutsäga ett objekts framtida placering med hjälp av de tidigare platserna för objektet. Intresset för problemet ökar i och med införandet av platsbaserade tjänster och autonoma fordon. Även om det är vanligare att studera kortsiktiga förutsägelser, särskilt när det gäller fordon, kan långsiktiga förutsägelser vara användbara i många applikationer som schemaläggning, resurshantering eller trafikprognoser. I detta masterprojekt presenterar jag en feature-representation av rörelse som kan användas för att lära in långsiktiga rörelsemönster och för långsiktig rörelseprediktion både i rymden och tiden. Representationen bygger på periodicitet i data och är baserad på att dela upp banan i fönster och sedan beräkna viktade n-grams av banorna från de olika fönstren. Algoritmen utvärderas på transportdata för tunga transportfordon för att bedöma dess förmåga att från ett sökindex hämta fordon som med stor sannolikhet kommer att röra sig längs en rutt som matchar ett önskat transportuppdrag. Experimentella resultat visar att algoritmen kan uppnå ett konsekvent lågt fel i relativt predikterat avstånd över olika transportlängder i ett begränsat geografiskt område under verkliga förhållanden. Resultaten indikerar även att den totala populationen av fordon i indexet är en kritisk faktor för algoritmens prestanda och därmed även för dess applicerbarhet för verklig användning.
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Kašpar, Michal. "Theory and practice of manufacturing scheduling." Master's thesis, Vysoká škola ekonomická v Praze, 2008. http://www.nusl.cz/ntk/nusl-12435.
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Manufactural activity is the basis of every sound economy. The risk for today's industrial establishments in our let us say european conditions is to hold competitiveness in the terms of global economy. This diploma thesis is focusing on solving problems of manufacturing scheduling with the view of theory and practice. It is impeach of real-life production. Scheduling belongs to hard combinatorial problems and therefore are usually solved by various heuristic or metaheuristic methods. For application of mentioned metaheuristic methods is important to use suitable choice of representative data.
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Gatinel, Damien. "Une nouvelle méthode de décomposition polynomiale d’un front d’onde oculaire." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLV042/document.
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Les défaut de la vision sont analysés et classés à partir des caractéristiques mathématiques du front d’onde de l’oeil considéré. Après avoir présenté la méthode actuelle basée sur la décomposition du front d’onde dans la base orthonormale de Zernike ainsi que certaines de ses limitations, on propose ici une nouvelle base de décomposition. Celle-ci repose sur l’utilisation del’espace des fronts d’onde polynomiaux de valuation supérieure ou égale à L + 1 (où L est un entier naturel) et permet de décomposer de manière unique un front d’onde polynomial en la somme d’un front d’onde polynomial de bas degré (inférieur ou égal à L) et un front d’onde polynomial de haute valuation (supérieure ou égal à L + 1). En choisissant L = 2, une nouvelle décomposition est obtenue, appelée D2V3, où le front d’onde polynomial de haut degré ne comporte pas de termes de degré radial inférieur ou égal à deux. Cette approche permet de dissocier parfaitement les aberrations optiques corrigibles ou non par le port de lunettes. Différents cas cliniques présentés dans la dernière section permettent de mettre en évidence l’intérêt de cette nouvelle base de décomposition<br>The eye vision defaults are analyzed and classified by studyingthe corresponding eye wavefront. After presenting the orthogonal basis, called the Zernike basis, that is currently used for the medical diagnosis, a new decomposition basis is built. It is based on the use of the space of polynomials of valuation greater or equal to L+1 (for L a natural integer). It allows to uniquely decompose a polynomial wavefront into the sum of a polynomial of low degree (lesser or equal to L) and a polynomial of high valuation (greater or equal to L +1). By choosing L = 2, a new decomposition, called D2V3, is obtained where the polynomial wavefront of high degree does not include terms of radial degree lesser or equal to 2. In particular, it allows to quantify perfectly the aberrations that can be corrected by eyeglasses or not. Various clinical examples clearly show the interest of this new basis compared to a diagnosis based on the Zernike decomposition
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Ortiz, Herculano Camargo. "O uso de recursos n??o convencionais como estrat??gia de ensino de Contabilidade." FECAP - Faculdade Escola de Com??rcio ??lvares Penteado, 2005. http://132.0.0.61:8080/tede/handle/tede/571.
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Previous issue date: 2005-08-26<br>The present work aims at presenting an alternative strategy for the transformation of an expositive class, in the accounting teaching-learning relationship. Such strategy is based on enabling the student to develop creative thinking, resulting in a sort of methodology that makes use of non-conventional resources. By showing its efficiency, breaking down prejudice against its adoption through the use of transformational techniques, such procedure reveals that tutors must always be interested in improving his or her pedagogical practice. This work is the result of the students' performance evaluation concerning the solution of exercises similar to those applied both in the former tests called "Prov??o", and those of the sufficiency exam of the Federal Accounting Council, in a private undergraduate college, within the eighth semester of the school period in 2004 at the Accounting College. The study is based on the comparison of performance results for solving exercises through two teaching strategies used in expositive accounting classes: the traditional strategy - as it is presented in traditional accounting literature - and the alternative strategy - based on non-conventional resources. The evaluation exercises that were applied focused on a diverse range of subjects, such as, Accounting Principles, Conventions and Postulates, Accounting Entry Formulas, Income Statement, Retained Earnings or Accumulated Losses Statement, and Statement of Resources and Uses of Funds. The results show that the use of non-conventional resources as a strategy to show concepts and pertinent knowledge has brought about substantial improvements in the students' average performance.<br>O presente trabalho tem como objetivo a apresenta????o de uma estrat??gia alternativa para transforma????o de uma aula expositiva, na rela????o ensino-aprendizagem da ??rea de contabilidade. Tal estrat??gia fundamenta-se na capacidade de estimular o pensamento criativo do aluno, gerando uma metodologia baseada na utiliza????o de recursos n??o convencionais. Na demonstra????o de sua efici??ncia, rompendo preconceitos em rela????o ?? sua ado????o e fazendo uso de t??cnicas transformadoras, esse procedimento revela que o professor deve estar sempre interessado no aperfei??oamento de sua pr??tica pedag??gica. Esse trabalho ?? resultado da an??lise do desempenho dos alunos na resolu????o de exerc??cios semelhantes aos do antigo "Prov??o" e aos do exame de sufici??ncia do Conselho Federal de Contabilidade, numa institui????o particular de ensino superior, no per??odo letivo referente ao oitavo semestre de 2004, do curso de Ci??ncias Cont??beis. O estudo baseia-se na compara????o dos resultados do desempenho na resolu????o dos exerc??cios com o uso de duas estrat??gias de ensino utilizadas em aulas expositivas de contabilidade: a estrat??gia convencional - apresentada na tradicional literatura cont??bil - e a estrat??gia alternativa - fundamentada no uso de recursos n??o convencionais. Os exerc??cios de avalia????o aplicados abordaram assuntos diversos, tais como Princ??pios, Conven????es e Postulados Cont??beis; F??rmulas de Lan??amentos Cont??beis; Demonstra????o do Resultado do Exerc??cio; Demonstra????o de Lucros ou de Preju??zos Acumulados e Demonstra????o de Origens e de Aplica????es de Recursos. Os resultados obtidos permitem concluir que o uso de recursos n??o convencionais como estrat??gia para evoca????o dos conceitos e dos conhecimentos pertinentes trouxe uma significativa melhora ao desempenho m??dio dos estudantes.
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Graf, Michael [Verfasser], Markus [Akademischer Betreuer] Lienkamp, and Boris [Akademischer Betreuer] Lohmann. "Methode zur Erstellung und Absicherung einer modellbasierten Sollvorgabe für Fahrdynamikregelsysteme / Michael Graf. Gutachter: Boris Lohmann ; Markus Lienkamp. Betreuer: Markus Lienkamp." München : Universitätsbibliothek der TU München, 2014. http://d-nb.info/1062701070/34.
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Gran, Sana [Verfasser], and Bernd [Akademischer Betreuer] Rüschoff. "Using NLP (Neuro-Linguistic Programming) methods in teaching and learning : case studies on the potential and impact of NLP methods on learning and learners / Sana Gran ; Betreuer: Bernd Rüschoff." Duisburg, 2021. http://d-nb.info/1234911167/34.
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Valieva, Inna. "Photometric Methods for Autonomous Tree Species Classification and NIR Quality Inspection." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-176266.
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In this paper the brief overview of methods available for individual tree stems quality evaluation and tree species classification has been performed. The use of Near Infrared photometry based on conifer’s canopy reflectance measurement in near infrared range of spectrum has been evaluated for the use in autonomous forest harvesting. Photometric method based on the image processing of the bark pattern has been proposed to perform classification between main construction timber tree species in Scandinavia: Norway spruce (Picea abies) and Scots Pine (Pinus sylvestris). Several feature extraction algorithms have been evaluated, resulting two methods selected: Statistical Analysis using gray level co-occurrence matrix and maximally stable extremal regions feature detector. Feedforward Neural Network with Backpropagation training algorithm and Support Vector Machine classifiers have been implemented and compared. The verification of the proposed algorithm has been performed by real-time testing.
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Košíková, Jana. "Základní myšlenky metody Six sigma." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228208.
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This diploma thesis deals with a Six Sigma method, about especially analysis defects of forms for tire production company Barum Continental. In the first, theoretic part, there is the Six Sigma method, improvement method and implementation into practice defined, and at last I attended to the tools of Six Sigma method, e. g. Control Charts, Regression analysis, Pareto analysis. In the second, practical part, there is the industrial process analyzed. Then I was introduced Barum Continental spol. s.r.o. concern, which data extended. Up to data processing I was used tools of Six Sigma method and also histogram.
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Dube, Callote. "Prevalence and risk factors for Helicobacter pylori transmission in the Eastern Cape Province application of immunological molecular and demographic methods." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/265.
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Helicobacter pylori (H. pylori) is a microaerophilic, Gram-negative motile curved rod that inhabits the gastric mucosa of the human stomach. The organism chronically infects billions of people worldwide and is one of the most genetically diverse of bacterial species. Infection with the organism potentially induces chronic gastritis and peptic ulcer disease. In addition, H. pylori plays a role in the etiology of gastric cancer and gastric MALT lymphoma. The risk of infection is increased in those living in the developing world, which has been ascribed to precarious hygiene standards, crowded households, and deficient sanitation common in this part of the world. Thus, the aim of this study was to identify the risk factors in the transmission of H. pylori in our environment, i.e. in Nkonkobe Municipality in the Eastern Cape Province, South Africa. Faecal samples were collected from 356 apparently healthy subjects, consisting of 168 males and 188 females aged from 3 months to 60 years (Mean = 31 years). A standardized questionnaire was applied, it described demographic characteristics including age, sex, household hygiene, socioeconomic status, area of residence, duration of stay in the area, sharing bath water, sharing tooth brush, habit of sucking thumb, medication currently being taken or medication taken within the past three months, source of water, type of toilet used, education and occupation. A sandwich-type enzyme immunoassay amplification technology (Amplified IDEIA TM Hp StAR TM , Oxoid, UK) was used to analyze the faecal samples for the detection of H. pylori antigens using monoclonal antibodies specific for H. pylori antigens. To assess the possibility of faecal oral route with tap water as an intermediary link, PCR targeting the ureC (glmM), a highly conserved gene in H. pylori ii was carried out to detect H. pylori DNA in faecal samples of already positive samples by HpSA test as well as in direct tap water used by the H. pylori positive subjects. QIAamp DNA stool mini kit was used to extract DNA from faecal samples. Tap water samples were then obtained using sterile bottles from areas inhabited by H. pylori positive subjects as determined by HpSA test and PCR. DNA extraction from water samples was done using UltraCleanTM Water DNA Isolation Kit (0.22μm) according to the manufacturer’s instructions. PCR with primers specific for H. pylori glmM gene was carried out with both positive and negative controls incorporated. Fisher’s exact test was used to assess the univariate association between H. pylori infection and the possible risk factors. Odds ratio (OR) and the corresponding 95 percent confidence interval (CI) were calculated to measure the strength of association using EPI INFO 3.41 package. P values of < .05 were required for significance. The precision rate of the diagnostic tests used was also determined. H. pylori antigen was detected in 316 of the 356 subjects giving an overall prevalence of 88.8 percent. Prevalence increased with age from 75.9 percent in children < 12 years age to 100 percent in the age group from 13 years to 24 years, also 100 percent prevalence of H. pylori was recorded in young adults aged 25-47 years and subjects aged 60 years (P < .05). H. pylori prevalence was higher in females than in males. Of 188 females who participated in the study, H. pylori antigen was detected in 172 (91.5 percent) versus 144 (85.7 percent) of 168 males (P > .05). Interestingly, H pylori antigen was detected more often (100 percent) in the high socioeconomic group than in those of low socioeconomic group (85.9 percent). Sixteen (66.7 percent) of twenty four faecal samples that had previously tested positive for the organism by HpSA test were confirmed positive by PCR. However none of the treated tap water samples tested positive for the organism by PCR. The present iii study revealed a high prevalence of H. pylori in faecal samples of asymptomatic individuals in the Nkonkobe Municipality, an indication of active infection. The obtained results also revealed that direct treated tap water might not be playing a crucial role in the oral transmission of H. pylori in the studied population.
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Slouka, Petr. "Podnikatelský plán." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2011. http://www.nusl.cz/ntk/nusl-223159.
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This master’s thesis contains the basis for the business plan of the project – real property sales. An evaluation of the strong and weak points of the project along with the elaboration of a financial and time analysis result from the thesis. Furthermore, the thesis offers a proposal for the most convenient way to continue in this business intention. A particular stress was placed on the cost estimate using the Monte Carlo method.
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Smetana, Alexander B. "Gram quantities of silver and alloy nanoparticles : synthesisthrough digestive ripening and the solvated metal atom dispersion(SMAD) method: antimicrobial properties, superlatteic[superlattice] selfassembly,and optical properties." Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/160.
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Algamaiah, Hamad. "The effect of aging methods on the fracture toughness and physical stability of an oxirane/acrylate, ormocer, and bis-gma based resin composites." Thesis, University of Iowa, 2018. https://ir.uiowa.edu/etd/3238.
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Objective: To measure the fracture toughness, surface area and volume of a conventional Bis-GMA based resin composite (Filtek Supreme), experimental oxirane/acrylate based resin composite (OASys), and ormocer-based resin composite (Admira) at baseline (control) and after a 15-day exposure to a Streptococcus mutans based biofilm or 30 days storage in water.
Methods. A 25 x 5 x 2.8 mm stainless-steel mold with 2.5 mm single edge notch at the center was used, following ASTM standards [E399-90], to fabricate 135 specimens (n=15) and distributed into nine groups based on composite material and aging conditions. For the baseline group, specimens were fabricated and then tested after 24hours storage in water. For the biofilm challenge, specimens were randomly placed in a six well tissue culture plate and kept at 37o C with bacterial growth media (Brain Heart Infusion (BHI); Streptococcus mutans) changed daily for 15 days. BHI medium was supplemented with 0.5% sucrose to promote the establishment of a biofilm for the initial 24 hours. For the water storage challenge, specimens were kept for 30 days in 5 ml of deionized distilled autoclaved water at 37o C and was changed every seven days. Three specimens from each experimental group were randomly selected for μCT evaluation by scanning the specimens before and after the proposed challenge. Fracture toughness (KIc) testing was carried out using a universal test with a load cell capacity of 500 N using three-point bending with 20mm spam at a cross-head speed of 0.5 mm/min.
Results. Filtek and Admira mean baseline toughness (KIc) was significantly higher than that observed for water and biofilm challenges. OASys mean fracture toughness values in water were significantly higher than the baseline. Toughness values for OASys in biofilm were not statistically different when compared to either water or baseline. One-way repeated measures statistical test was used, which showed no significant change in volume or surface area regardless of the materials tested or the challenges used (p>0.05).
Conclusion. The fracture toughness of the commercially available resin composite materials (Filtek Supreme Ultra, Admira Fusion) was negatively affected by the environmental challenges of 15 days of biofilm challenge and by 30 days of water storage. The experimental composite (OASys) showed a different pattern than the commercially available composite, with an increase in fracture toughness after being stored in water. The μCT evaluation method allowed for physical evaluation without affecting the specimens.
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Vacula, Vladimír. "Využití statistických metod projektu R v systému pro podporu rozhodování." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2008. http://www.nusl.cz/ntk/nusl-221936.
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The aim of this thesis is to present possibility to integrate Decision Support System with specialized system for statistical computing and provides easier way to analyze economics indicators using sophisticated statistical methods. The R project is complex set of applications, designated for manipulation, computing and graphical presentation of data sets. It is mostly used for statistical analysis and graphical presentations. It allows users to create new methods with language similar to S as well as using the default methods provided.
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Saüch, i. Valmaña Glòria. "Beneficis de la motricitat perceptiva en programes municipals d'activitat física per a la gent gran." Doctoral thesis, Universitat de Lleida, 2014. http://hdl.handle.net/10803/285487.
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El tema de la nostra recerca s’ha centrat en adaptar i generar instruments per observar els patrons motrius que es generen els programes d’activitat física adreçats al col•lectiu de la gent gran així com constatar la relació d’aquests patrons amb la percepció de beneficis que perceben els participants. Per tal de contextualitzar el marc teòric ens hem centrat en les característiques pròpies de l’envelliment saludable i actiu, i hem fet una anàlisi d’aquests programes tot considerant-los una de les manifestacions bàsiques de la motricitat. Aquest enfocament ens ha permès identificar les capacitats i les habilitats motrius així com els perfils motrius, que generen els programes d’activitat física. Un procedir posterior des dels enfocaments Mixed Methods Research, ens ha permès combinar altres instruments d’anàlisi estandarditzats i semi estandarditzats amb la metodologia observacional a fi de constatar els beneficis que perceben els practicants dels programes.<br>El tema de nuestra investigación se ha centrado en adaptar y crear instrumentos para observar los patrones motrices que generan los programas de actividad física dirigidos al colectivo de las personas mayores así como constatar la relación de estos patrones con la percepción de beneficios que perciben los participantes. Para contextualizar el marco teórico nos hemos centrado en las características propias del envejecimiento saludable y activo en el que hemos hecho un análisis de estos programas considerándolos una de las manifestaciones básicas de la motricidad. Este enfoque nos ha permitido identificar las capacidades y las habilidades motrices así como los perfiles motrices, que generan los programas de actividad física. Un proceder posterior desde los enfoques Mixed Methods Research, nos ha permitido combinar otros instrumentos de análisis estandarizados y semi estandarizados con la metodología observacional con el fin de constatar los beneficios que perciben los practicantes de los programas.<br>The theme of our research has focused on developing instruments to observe the motor patterns generated by physical activity programmes aimed at the elderly and assessing the relationship of these patterns with the benefits perceived by the participants. In order to contextualize the theoretical framework we focused on the characteristics of active, healthy aging and we made an analysis of these programmes, considering them as one of the basic expressions of motor skills. This approach allowed us to identify the motor skills and abilities and the motor profiles generated by the physical activity programmes. A later application of Mixed Methods research allowed us to combine other standardized and semi-standardized analysis tools with the observation method in order to ascertain the benefits perceived by the participants in the programme.
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Graf, Matthias [Verfasser]. "Entwicklung und Validierung einer neuen Methode zur Charakterisierung des Scherverhaltens von Carbonfasergewebe mit Binderauftrag unter Normalkraft und viskoser Reibung bei hohen Prozesstemperaturen / Matthias Graf." Karlsruhe : KIT Scientific Publishing, 2018. http://www.ksp.kit.edu.
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Graf, Daniel [Verfasser], and Christian [Akademischer Betreuer] Ochsenfeld. "Development of efficient electronic-structure methods based on the adiabatic-connection fluctuation-dissipation theorem and Møller–Plesset perturbation theory / Daniel Graf ; Betreuer: Christian Ochsenfeld." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/123217629X/34.
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Gallego, Jutglà Esteve. "New signal processing and machine learning methods for EEG data analysis of patients with Alzheimer's disease." Doctoral thesis, Universitat de Vic - Universitat Central de Catalunya, 2015. http://hdl.handle.net/10803/290853.
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Les malalties neurodegeneratives són un conjunt de malalties que afecten al cervell. Aquestes malalties estan relacionades amb la pèrdua progressiva de l'estructura o la funció de les neurones, incloent-hi la mort d'aquestes. La malaltia de l'Alzheimer és una de les malalties neurodegeneratives més comunes. Actualment, no es coneix cap cura per a l'Alzheimer, però es creu que hi ha un grup de medicaments que el que fan és retardar-ne els principals símptomes. Aquests s'han de prendre en les primeres fases de la malaltia ja que sinó no tenen efecte. Per tant, el diagnòstic precoç de la malaltia de l'Alzheimer és un factor clau.
En aquesta tesis doctoral s'han estudiat diferents aspectes relacionats amb la neurociència per investigar diferents eines que permetin realitzar un diagnòstic precoç de la malaltia en qüestió. Per fer-ho, s'han treballat diferents aspectes com el preprocessament de dades, l'extracció de característiques, la selecció de característiques i la seva posterior classificació.<br>Neurodegenerative diseases are a group of disorders that affect the brain. These diseases are related with changes in the brain that lead to loss of brain structure or loss of neurons, including the dead of some neurons. Alzheimer's disease (AD) is one of the most well-known neurodegenerative diseases. Nowadays there is no cure for this disease. However, there are some medicaments that may delay the symptoms if they are used during the first stages of the disease, otherwise they have no effect. Therefore early diagnose is presented as a key factor.
This PhD thesis works different aspects related with neuroscience, in order to develop new methods for the early diagnose of AD. Different aspects have been investigated, such as signal preprocessing, feature extraction, feature selection and its classification.
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Matos, Ernesto Cid Brasil de. "Beta: uma ferramenta para gera??o de testes de unidade a partir de especifica??es B." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18042.
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Previous issue date: 2012-02-10<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Formal methods and software testing are tools to obtain and control software quality. When used together, they provide mechanisms for software specification, verification
and error detection. Even though formal methods allow software to be mathematically verified, they are not enough to assure that a system is free of faults, thus, software
testing techniques are necessary to complement the process of verification and validation of a system. Model Based Testing techniques allow tests to be generated from other software artifacts such as specifications and abstract models. Using formal specifications as basis for test creation, we can generate better quality tests, because these specifications
are usually precise and free of ambiguity. Fernanda Souza (2009) proposed a method to define test cases from B Method specifications. This method used information from the
machine s invariant and the operation s precondition to define positive and negative test cases for an operation, using equivalent class partitioning and boundary value analysis
based techniques. However, the method proposed in 2009 was not automated and had conceptual deficiencies like, for instance, it did not fit in a well defined coverage criteria
classification. We started our work with a case study that applied the method in an example of B specification from the industry. Based in this case study we ve obtained
subsidies to improve it. In our work we evolved the proposed method, rewriting it and adding characteristics to make it compatible with a test classification used by the
community. We also improved the method to support specifications structured in different components, to use information from the operation s behavior on the test case generation process and to use new coverage criterias. Besides, we have implemented a tool to automate the method and we have submitted it to more complex case studies<br>M?todos formais e testes s?o ferramentas para obten??o e controle de qualidade de software. Quando utilizadas em conjunto, elas prov?em mecanismos para especifica??o,
verifica??o e detec??o de falhas de um software. Apesar de permitir que sistemas sejam matematicamente verificados, m?todos formais n?o s?o suficientes pra garantir que um
sistema esteja livre de defeitos, logo, t?cnicas de teste de software s?o necess?rias para completar o processo de verifica??o e valida??o de um sistema. T?cnicas de Testes
Baseados em Modelos permitem que testes sejam gerados a partir de outros artefatos de software como especifica??es e modelos abstratos. Ao utilizarmos especifica??es formais
como base para a cria??o de testes, podemos gerar testes de melhor qualidade pois estas especifica??es costumam ser precisas e livres de ambiguidade. Fernanda Souza (2009)
prop?s um m?todo para definir casos de teste a partir de especifica??es do M?todo B. Este m?todo utilizava informa??es do invariante de uma m?quina e das pr?-condi??es
de uma opera??o para definir casos de teste positivos e negativos para tal opera??o, atrav?s de t?cnicas baseadas em particionamento em classes de equival?ncia e an?lise
de valor limite. No entanto, a proposta de 2009 n?o inclu?a automa??o e possu?a algumas defici?ncias conceituais como, por exemplo, n?o se encaixar exatamente em uma classifica??o de crit?rios de cobertura bem definida. Iniciamos nosso trabalho com um estudo de caso que aplicou o m?todo a um exemplo de especifica??o B proveniente da ind?stria. A partir deste estudo obtivemos subs?dios para o aperfei?o?-lo. Em nosso trabalho aperfei?oamos o m?todo proposto, reescrevendo e adicionando caracter?sticas para torn?-lo compat?vel com uma classifica??o de testes utilizada pela comunidade. O m?todo tamb?m foi melhorado para suportar especifica??es estruturadas em v?rios
componentes, utilizar informa??es sobre o comportamento da opera??o durante a cria??o de casos de teste e utilizar novos crit?rios de cobertura. Al?m disso, implementamos uma
ferramenta para automatiz?-lo e o submetemos a estudos de caso mais complexos
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Leunert, Matthias [Verfasser], Hubertus [Akademischer Betreuer] Axer, Christian [Akademischer Betreuer] Ewald, and Dirk Graf von [Akademischer Betreuer] Keyserlingk. "Polarisationsoptische Methodik zur Herstellung eines 3D Fasermodells des menschlichen Hirnstamms / Matthias Leunert. Gutachter: Hubertus Axer ; Christian Ewald ; Dirk Graf von Keyserlingk." Jena : Thüringer Universitäts- und Landesbibliothek Jena, 2015. http://d-nb.info/1065233671/34.
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Bweli, Kabanyana Denise. "The impact of context variables in the measure of Willingness-to-pay for omega 3 milks : a comparative study of four value elicitation methods." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25952.
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Nous nous sommes intéressés dans cette recherche à comprendre l’effet de quatre méthodes d’élicitation sur la mesure du consentement à payer en lien au biais hypothétique, principalement, et dans un second ordre, à évaluer l’impact du positionnement de l’information sur ces valeurs. Nous constatons que les valeurs de consentement à payer ainsi élicitées sont plus élevées dans les deux situations hypothétiques, et que l’usage du texte dit de « cheap talk » ne réduit pas le biais hypothétique observé. Nos résultats indiquent également que la participation, une caractéristique importante de notre schéma expérimental, était plus élevée en situation hypothétique parmi les individus consentant à participer alors qu’ils déclarent ne pas consommer le produit spécifique à évaluer, ce qui supporte davantage la présence du biais hypothétique. De plus, l’effet du « cheap talk » a été principalement capturé à travers une participation plus élevée dans une des situations hypothétiques faisant usage du « cheap talk ». Un autre élément important de notre schéma expérimental évalue l’effet d’un référentiel sur les prix de proches substituts à certains produits de spécialité. Nos résultats sur le référentiel sont à double titre : il assiste les individus dans le processus cognitif d’élicitation des valeurs propres pour des produits non familiers ; et il réduit l’incertitude associée aux mécanismes non familiers tels les enchères de nième prix. L’objectif secondaire dans cette étude s’intéresse à l’impact de l’information. Nous observons des effets dû au positionnement de l’information, dans la mesure où une description neutre des attributs de produits présentée expressément dans des angles différents aboutit en des résultats par ailleurs différents sur le niveau de participation ainsi que le consentement à payer.<br>We are interested in this study in understanding the effect of four elicitation methods on the measure of willingness to pay in relation to the hypothetical bias, primarily, and secondary, to assess the impact of the framing of information on those valuations. We find elicited values of willingness to pay to be higher in the two hypothetical settings, and that the employment of a cheap talk script does not reduce the observed hypothetical bias. Our results also indicate that participation, an important feature of our experimental design, was higher amongst individuals in hypothetical settings willing to participate although they state not to consume a specific product to value, which further supports the presence of hypothetical bias. Furthermore, the effect of the cheap talk was mainly captured in an overall increased participation in the one hypothetical setting where cheap talk was used. Another key element of our experimental design tested the effect of a referential of prices of close substitute of certain specialty products. Our results on the referential are twofold: it helped individuals in the cognitive process of eliciting homegrown values for unfamiliar products; and it reduced the uncertainty associated with unfamiliar mechanisms such nth price auctions. Secondary objective to this study was the assessment of the impact of information. We find framing effects to be present in the sense that neutral descriptions of products’ attributes with purposely different angles resulted in different outcomes on the level of participation as well as on willingness to pay.
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Smetana, Alexander B. "Gram quantities of silver and alloy nanoparticles: synthesis through digestive ripening and the solvated metal atom dispersion (SMAD) method: antimicrobial properties, superlatteic[i.e. super lattice] selfassembly, and optical properties." Diss., Kansas State University, 2006. http://hdl.handle.net/2097/160.
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Doctor of Philosophy<br>Department of Chemistry<br>Kenneth J. Klabunde<br>This is an account of the synthesis of several drastically different forms of silver
nanoparticles: Bare metal nanoparticles, dry nanoparticulate powders, aqueous soluble particles, and organic ligand coated monodisperse silver nanoparticles were all produced. The synthetic method was adapted from previous studies on gold nanoparticles and investigated to understand the optimal conditions for silver nanoparticle synthesis. Also the procedure for refinement of the nanoparticles was studied and applied to the formation of alloy nanoparticles. This extraordinary procedure produces beautifully colored colloids of spherical metal nanoparticles of the highest quality which under suitable conditions self-assemble into extensive three dimensional
superlattice structures. The silver nanoparticle products were later tested against several biological pathogens to find dramatic increases in antimicrobial potency in comparison to commercially available silver preparations.
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Gomes, Bruno Emerson Gurgel. "BSmart: desenvolvimento rigoroso de aplica??es Java Card com base no m?todo formal B." Universidade Federal do Rio Grande do Norte, 2007. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17964.
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Previous issue date: 2007-11-19<br>Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior<br>Java Card technology allows the development and execution of small applications embedded in smart cards. A Java Card application is composed of an external card client and of an application in the card that implements the services available to the client by means of an Application Programming Interface (API). Usually, these applications manipulate and store important information, such as cash and confidential data of their owners. Thus, it is necessary to adopt rigor on developing a smart card application to improve its quality and trustworthiness. The use of formal methods on the development of these applications is a way to reach
these quality requirements. The B method is one of the many formal methods for system specification. The development in B starts with the functional specification of the system, continues with the application of some optional refinements to the specification and, from the last level of refinement, it is possible to generate code for some programming language. The B formalism has a good tool support and its application to Java Card is adequate since the specification and development of APIs is one of the major applications of B. The BSmart method proposed here aims to promote the rigorous development of Java Card applications up to the generation of its code, based on the refinement of its formal specification described in the B notation. This development is supported by the BSmart tool, that is composed of some programs that automate each stage of the method; and by a library of B modules and Java Card classes that model primitive types, essential Java Card API classes and reusable data structures<br>A tecnologia Java Card permite o desenvolvimento e execu??o de pequenas aplica??es embutidas em smart cards. Uma aplica??o Java Card ? composta por um cliente, externo ao cart?o, e por uma aplica??o contida no cart?o que implementa os servi?os dispon?veis ao cliente por meio de uma Application Programming Interface (API). Usualmente, essas aplica??es manipulam e armazenam informa??es importantes, tais como valores monet?rios ou dados confidenciais do seu portador. Sendo assim, faz-se necess?rio adotar um maior rigor no processo de desenvolvimento de uma aplica??o smart card, visando melhorar a sua qualidade e confiabilidade. O emprego de m?todos formais como parte desse processo ? um meio de se alcan?ar esses requisitos de qualidade. O m?todo formal B ?e um dentre os diversos m?todos formais para a especifica??o de sistemas. O desenvolvimento em B tem in?cio com a especifica??o funcional do sistema, continua com a aplica??o opcional de refinamentos ? especifica??o e, a partir do ?ltimo n?vel de refinamento, ? poss?vel a gera??o de c?digo para alguma linguagem de programa??o. O formalismo B conta com bom suporte de ferramentas e a sua aplica??o a Java Card mostra-se bastante adequada, uma vez que a especifica??o e desenvolvimento de APIs ?e o ponto forte de B. O m?todo BSmart aqui proposto visa promover o desenvolvimento rigoroso de aplica??es Java Card a partir da gera??o de c?digo da aplica??o com base em refinamentos da sua especifica??o formal descrita na nota??o B. O processo de
desenvolvimento descrito no m?todo ? apoiado pela ferramenta BSmart, a qual constitui-se por alguns programas que automatizam cada etapa do m?todo; e por uma biblioteca de m?dulos B e classes Java Card que modelam tipos primitivos, classes essenciais da API Java Card e estruturas de dados reutiliz?veis