The Hydrologic Information System Project of the Consortium of Universities for the Advancement of Hydrologic Science, Inc. (CUAHSI) has successfully created a large-scale prototype Hydrologic Information System (HIS). This system catalogs and provides access to over 23 million time series of hydrologic data, which are distributed across the United States at various academic, research, and governmental data providers. The service-oriented architecture that enables the HIS comprises distributed hydrologic data servers, a centralized series catalog, and various client software applications, and is supported by WaterML, a standardized language for transmission of hydrologic data. The current architectural model, termed the Network-Observations Model, of the HIS relies on a searchable central catalog of series metadata. Harvesting series metadata from large federal data providers, such as the USGS, EPA, and NCDC, has proven a laborious undertaking and involves custom database migration tools. This time-consuming harvesting task, coupled with a multitude of custom-coded solutions at the central series catalog has led to concerns with the long-term sustainability of the current architectural model. A new architectural model, termed the Services Stack Model, is proposed in this thesis. In the proposed model, a catalog of services metadata, rather than of series metadata is used to connect hydrologic data consumers with data providers. Internationally-recognized web service and data encoding standards, including the upcoming WaterML2.0 specification, from the Open Geospatial Consortium are used as the backbone of the new model. The proposed model will hopefully lead to greater acceptance of the CUAHSI-HIS, and result in increased sustainability and reduced maintenance of the system in the long-term. / text

Ce travail contribue à développer des méthodes de résolution associées à la méthode de simulation MMP (Model of Manufactured Part) développée par F.Vignat et F.Villeneuve. Le MMP est un modèle générique 3D des défauts géométriques engendrés sur les pièces fabriquées par un processus de fabrication donné. Ce modèle permet de générer un ensemble de pièces virtuellement fabriquées incluant les incertitudes de fabrication et permet par conséquent de mener l'analyse de tolérances fonctionnelles. Les méthodes de résolution développées autour du MMP permettent aux ingénieurs de fabrication d'évaluer une gamme de fabrication candidate du point de vue géométrique. Le développement des méthodes de résolution s'est effectué selon 2 axes. Le premier axe consiste à développer des méthodes pour la recherche du pire des cas (WCTA). La première approche de cet axe utilise des méthodes d'optimisation (SQP pour Sequential Quadratic Programming et GA pour les algorithmes génétiques) basées sur la recherche du pire des cas. La recherche du pire des cas consiste en un algorithme d'optimisation multicouche comportant deux boucles principales. La deuxième approche de cet axe consiste à faire une adaptation de la méthode du torseur des petits déplacements avec intervalle (modèle Jacobien Torseur développé au Canada) à la méthode MMP. Le deuxième axe concerne les méthodes stochastiques permettant une simulation de production d'un ensemble de pièces et l'analyse des résultats d'un point de vue statistique. La méthode stochastique est basée sur une méthode de tirage aléatoire sous contraintes. Les différentes approches sont finalement comparées entre elles.

Diploma thesis deals with methods of communication and stylistic education at the elementary school, specifically in the second class. The main aim is to create a stack of methods for this subject which will be effectively applicable in practice. The task is divided into theoretical and empirical part. The theoretical one has six chapters. Five of them characterize notions connected to the topic, definitions, conception of communication and stylistic education in past and nowadays. They also submit principles, content and goal of this component. The sixth chapter presents different categorization described in scholarly literature. It compares described systems and it apprizes with available methods. The empirical part is dedicated to the stack of communication and stylistic education methods that is possible to use in specific lessons. It has been based on analysis of scientific literature, own class observation and it is complemented by innovative teaching methods. In the end of thesis we discuss about available material for teachers, the efficiency of created method, advantages of created stack and its usage in future.

Dans le cadre de la lutte contre l'augmentation des gaz à effet de serre et la préservation de l'environnement, l'efficacité énergétique est un enjeu majeur du XXIème siècle. Par exemple, les moteurs et actionneurs électriques sont de plus en plus nombreux dans le monde, les transformateurs de distribution affichent une efficacité énergétique de 97 à 99 %. Cependant, en raison de leur utilisation intensive, leur impact environnemental est loin d'être négligeable. De ce fait une compréhension et une détermination plus précise des pertes dans ces machines électriques permettraient d'améliorer l'efficacité énergétique des dispositifs d'électronique de puissance et des machines électriques. Ces dispositifs sont le siège de pertes dans les bobinages et dans les circuits magnétiques. L'objectif de cette thèse est de pouvoir modéliser, par des méthodes numériques de type éléments finis, les pertes dans les circuits magnétiques feuilletés des machines électriques.Cependant le laminage de ces circuits magnétiques, qui permet de réduire les courants de Foucault, induit de fortes contraintes de modélisation. En effet la nécessité de disposer d'au moins deux éléments finis dans l'épaisseur de peau pour obtenir une solution de qualité, conduit à la réalisation de maillages de taille très importante, incompatible avec les moyens de calcul disponibles aujourd'hui.L'objectif de ce travail est de développer des modèles de lois de comportement homogénéisé des matériaux magnétiques feuilletés dans le cadre de l'utilisation de la méthode des éléments finis en 2D et 3D, avec application aux machines tournantes et aux transformateurs. Ces modèles à priori permettront de prendre en compte les pertes en cours de résolution, afin d'obtenir des résultats précis sur les grandeurs locales et globales, et notamment les pertes, en fonction du temps. / Energy efficiency becomes a global major issue of XXIst century as we are dealing with greenhouse emissions. For instance electric rotating machines and actuators are globally more used than before. Distribution transformers do have 97 to 99% efficiency rate, with a non negligible environmental impact due to their intensive use. A thorough understanding and modeling of losses in those electric devices could help improving and maintaining that level of environmental impact and energy efficiency. This could be productive to many electrical devices from power electronics devices to electric machines and networks, because of losses in windings and magnetic cores. The main aim of this study is to model eddy current losses in laminated magnetic cores of electric machines by means of numerical methods such as Finite Element Methods (FEM).Laminating magnetic cores besides reducing eddy current loops, induces new modeling constraints . The necessary assignment of at least two elements in the skin depth in order to have good quality solutions, leads sometimes to unsolvable problems using actual computation solutions.The purpose will be to develop source code of homogenized behavior laws of laminated magnetic cores using 2D and 3D finite element methods, applied to transformers and electrical motors. Those a priori models consider losses in the main solving process allowing to have accurate results on local and macroscopic entities varying temporally.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-02T23:01:37Z No. of bitstreams: 1 YgorBastosMesquitaMinoraDeAlmeida_DISSERT.pdf: 7592861 bytes, checksum: 1713383707550d5acbf0d5b871effb2a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-03-04T22:10:21Z (GMT) No. of bitstreams: 1 YgorBastosMesquitaMinoraDeAlmeida_DISSERT.pdf: 7592861 bytes, checksum: 1713383707550d5acbf0d5b871effb2a (MD5) / Made available in DSpace on 2016-03-04T22:10:21Z (GMT). No. of bitstreams: 1 YgorBastosMesquitaMinoraDeAlmeida_DISSERT.pdf: 7592861 bytes, checksum: 1713383707550d5acbf0d5b871effb2a (MD5) Previous issue date: 2014-12-18 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / Atrav?s de fun??es de receptor migradas e empilhadas (phase-weightedstack), investigou-se a arquitetura crustal da Prov?ncia Borborema. Para isso, foram utilizados telessismos de ondas ? registrados em 64 esta??es sismogr?ficas distribu?das no Nordeste brasileiro, depois de aplicar um conjunto de modifica??es no algoritmo de empilhamento para corrigir inconsist?ncias detectadas no algoritmo original e melhorar sua efici?ncia computacional. A Prov?ncia Borborema representa a por??o mais oeste de um or?geno Neoproterozoico, que experimentou extens?o no Mesozoico, o que levou ? forma??o de um grande n?mero de bacias intracontinentais do tipo rifte, e, posteriormente, ? deriva continental. O Cenozoico foi marcado por processos de soerguimento topogr?fico, que poderia estar relacionado com vulcanismo, o que possibilitou a forma??o do Planalto da Borborema. Devido ? limitada compreens?o a respeito da arquitetura crustal da Prov?ncia, as rela??es de causa e efeito entre a topografia superficial, a extens?o Mesozoica e o soerguimento Cenozoico n?o s?o claras. O empilhamento de fun??es de receptor evidencia as convers?es ?? no limite entre a crosta e o manto, mostrando crosta espessa, entre 36 e 40 km na por??o sul do Planalto e crosta entre 30 e 32 km nas regi?es ao redor, incluindo o norte do Planalto. Essa mesma abordagem tamb?m revelou a presen?a de uma descontinuidade entre 9 e 18 km de profundidade, que tende a desaparecer em dire??o ao sul do Planalto, ? medida que a crosta se torna espessa. Dessa forma, argumenta-se que a crosta fina na Prov?ncia Borborema ? o resultado de processos de estiramento crustal durante o Mesozoico e que a descontinuidade intracrustal observada consiste num detachment de baixo ?ngulo, que atuou na acomoda??o da distens?o. A crosta espessa na por??o sul do Planalto seria, ent?o, um bloco com reologia mais resistente, que resistiu a deforma??o durante o Mesozoico, enquanto a crosta fina sob o norte do Planalto seria proveniente de uma bacia pret?rita, cuja crosta foi afinada durante o Mesozoico e soerguida durante o Cenozoico. / The crustal architecture of the Borborema Province was investigated through migration and stacking of receiver functions (phase-weighted-stack). The stacks were developed from teleseismic ?-waves recorded at 64 seismological stations distributed throughout Northeast Brazil, after applying a number of modifications to the stacking algorithm that corrected inconsistencies in the original algorithm and improved its computational efficiency. The Borborema Province is the westernmost portion of a Neoproterozoic orogen that experienced extension in the Mesozoic, leading to the formation of a number of intracontinental rift basins and, eventually, to the continental drift. The Cenozoic was marked by topographic uplift of the Province, perhaps related to coeval episodes of volcanism, which resulted in the formation of the Borborema Plateau. Due to limited understanding of the crustal architecture of the Province, the causal relationships between surface topography, Mesozoic extension, and Cenozoic uplift are poorly understood. The receiver function stacks highlight ?? conversions from the crust-mantle boundary that demonstrate a thick crust between 36 and 40 km in the southern Plateau, and crust between 30 and 32 km in the regions around, including the northern Plateau. The receiver function stacks also revealed the presence of a discontinuity between 9 and 18 km depth that tends to fade away towards the southern Plateau as the crust thickens. It is argued that the thin crust in the Borborema Province is the result of crustal stretching during Mesozoic times, and that the intracrustal discontinuity marks the location of a lowangle detachment zone that accommodated extension within the crust. The thick crust in the southern Plateau would then be a rheologically strong block that resisted deformation during the Mesozoic, while the thin crust beneath the northern Plateau would be a portion of a formerly depressed crust that experienced uplifted during the Cenozoic.

abstract: In recent years, the Silicon Super-Junction (SJ) power metal-oxide semiconductor field-effect transistor (MOSFET), has garnered significant interest from spacecraft designers. This is due to their high breakdown voltage and low specific on-state resistance characteristics. Most of the previous research work on power MOSFETS for space applications concentrated on improving the radiation tolerance of low to medium voltage (~ 300V) power MOSFETs. Therefore, understanding and improving the reliability of high voltage SJMOS for the harsh space radiation environment is an important endeavor.In this work, a 600V commercially available silicon planar gate SJMOS is used to study the SJ technology’s tolerance against total ionizing dose (TID) and destructive single event effects (SEE), such as, single event burnout (SEB) and single event gate rupture (SEGR). A technology computer aided design (TCAD) software tool is used to design the SJMOS and simulate its electrical characteristics. Electrical characterization of SJMOS devices showed substantial decrease in threshold voltage and increase in leakage current due to TID. Therefore, as a solution to improve the TID tolerance, metal-nitride-oxide-semiconductor (MNOS) capacitors with different oxide/nitride thickness combinations were fabricated and irradiated using a Co-60 gamma-source. Electrical characterization showed all samples with oxide/nitride stack gate insulators exhibited significantly higher tolerance to irradiation when compared to metal-oxide-semiconductor capacitors. Heavy ion testing of the SJMOS showed the device failed due to SEB and SEGR at 10% of maximum rated bias values. In this work, a 600V SJMOS structure is designed that is tolerant to both SEB and SEGR. In a SJMOS with planar gate, reducing the neck width improves the tolerance to SEGR but significantly changes the device electrical characteristics. The trench gate SJ device design is shown to overcome this problem. A buffer layer and larger P+-plug are added to the trench gate SJ power transistor to improve SEB tolerance. Using TCAD simulations, the proposed trench gate structure and the tested planar gate SJMOS are compared. The simulation results showed that the SEB and SEGR hardness in the proposed structure has improved by a factor of 10 and passes at the device’s maximum rated bias value with improved electrical performance. / Dissertation/Thesis / Doctoral Dissertation Electrical Engineering 2020

No description available.

With arrival of affordable digital technology we are increasingly coming into contact with digital images. Cameras are no longer dedicated devices, but part of almost every mobile phone, PDA and laptop. This paper discusses methods for enhancing quality of digital images with focus on removing noise, creating high dynamic range (HDR) images and extending depth of field (DOF). It contains familiarization with technical means for acquiring digital image, explains origin of image noise. Further attention is drawn to HDR, from explaining the term, physical basis, difference between HDR sensing and HDR displaying, to survey and historical development of methods dealing with creating HDR images. The next part is explaining DOF when displaying, physical basis of this phenomenon and review of methods used for DOF extension. The paper mentions problem of acquiring images needed for solving given tasks and designs method for acquiring images. Using it a database of test images for each task was created. Part of the paper also deals with design of a program, that implements discussed methods, for solving the given tasks. With help of proposed class imgmap, quality of output images is improved, by modifying maps of input images. The paper describes methods, improvements, means of setting parameters and their effects on algorithms and control of program using proposed GUI. Finally, comparison with free software for extending DOF takes place. The proposed software provides at least comparable results, the correct setting of parameters for specific cases allows to achieve better properties of the resulting image. Time requirements of image processing are worse because designed software was not optimised.

The aim of master's thesis is implementation of hardware interface database server. Interface will be collecting data at installation place. Interface will be connected to a remote MySQL server using an Ethernet network and saving data received by serial line in a database.

The diploma thesis deals with creating the Ethernet converter protocol UDP of the CAN bus with the used application layer CANopen. The converter is executed by means of the microcontroller ARM Cortex-M3, namely by STM32F107VC by STMicroelectronics. The project is designed for the purpose of serving as the main motor controlling card of the mobile advertising robot FektBot. In the theoretical part you can find a brief analysis of the ARM microcotrollers problematics, particularly the STM32F107VC. Then the thesis introduces the Ethernet technology including the UDP protocol. Finally, the CAN bus and its application layer CANopen is described. The practical part shows first of all the scheme of converter hardware. You can find there the design of printed circuits including all components for proper functioning, i.e. especially the microcontroller STM32F107VC, Ethernet PHY, the CAN bus transceiver and switched stabilized supply. Next chapter describes software creating for the given converter. Firstly there are analyzed possible ways of STM32F107VC programming, and then there is the main conception of resolving the programming part shown. The thesis then deals with the concrete implementation of the UDP Ethernet protocol. For that, the lwIP stack is used, over which the application layer of the FektBot robot works. Then there is analyzed the implementation of the CAN bus and CANopen. At the end of the practical part, the final execution of the converter software and the ways of its testing are described.