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Video is a sequence of 2D images of the 3D world generated by a camera. As the camera moves relative to the real scene and elements of that scene themselves move, correlated frame-to-frame changes in the video images are induced. Humans easily identify such changes as scene motion and can readily assess attempts to quantify it. For a machine, the identification of the 2D frame-to-frame motion is difficult. This problem is addressed by the computer vision process of tracking. Tracking underpins the solution to the problem of augmenting general video sequences with artificial imagery, a staple task in the visual effects industry. The problem is difficult because tracking in general video sequences is complicated by the presence of non-rigid motion, repeated texture and arbitrary occlusions. Existing methods provide solutions that rely on imposing limitations on the scenes that can be processed or that rely on human artistry and hard work. I introduce new paradigms, frameworks and algorithms for overcoming the challenges of processing general video and thus provide solutions that fill the gap between the `automated' and `manual' approaches. The work is easily sectioned into three parts, which can be considered separately or taken together for dealing with video without limitations. The initial focus is on directly addressing practical issues of human interaction in the tracking process: a new solution is developed by explicitly incorporating the user into an interactive algorithm. It is a novel tracking system based on fast full-frame patch searching and high-speed optimal track determination. This approach makes only minimal assumptions about motion and appearance, making it suitable for the widest variety of input video. I detail an implementation of the new system using k-d trees and dynamic programming. The second distinct contribution is an important extension to tracking algorithms in general. It can be noted that existing tracking algorithms occupy a spectrum in their use of global motion information. Local methods are easily confused by occlusions, repeated texture and image noise. Global motion models offer strong predictions to see through these difficulties and have been used in restricted circumstances, but are defeated by scenes containing independently moving objects or modest levels of non-rigid motion. I present a well principled way of combining local and global models to improve tracking, especially in these highly problematic cases. By viewing rank-constrained tracking as a probabilistic model of 2D tracks instead of 3D motion, I show how one can obtain a robust motion prior that can be easily incorporated in any existing tracking algorithm. The development of the global motion prior is based on rank-constrained factorization of measurement matrices. A common difficulty comes from the frequent occurrence of occlusions in video, which means that the relevant matrices are often not complete due to missing data. This defeats standard factorization algorithms. To fully explain and understand the algorithmic complexities of factorization in this practical context, I present a common notation for the direct comparison of existing algorithms and propose a new family of hybrid approaches that combine the superb initial performance of alternation methods with the convergence power of the Newton algorithm. Together, these investigations provide a wide-ranging, yet coherent exploration of tracking non-rigid objects in video.

In this thesis the superconducting and magnetic phases of LiOH(Fe,Co)(Se,S), CuFeAs/CuFeSb, and LaFeP_1-xAs_xO - belonging to the 11, 111 and 1111 structural classes of iron-based arsenides and chalcogenides - are investigated by means of 57Fe Mössbauer spectroscopy and muon spin rotation/relaxation (μSR). Of major importance in this study is the application of high magnetic fields in Mössbauer spectroscopy to distinguish and characterize ferro- (FM) and antiferromagnetic (AFM) order. A user-friendly Mössbauer data analysis program was developed to provide suitable model functions not only for high field spectra, but relaxation spectra or parameter distributions in general. In LaFeP_1-xAs_xO the reconstruction of the Fermi surface is described by the vanishing of the Γ hole pocket with decreasing x. The continuous change of the orbital character and the covalency of the d-electrons is shown by Mössbauer spectroscopy. A novel antiferromagnetic phase with small magnetic moments of ~ 0.1 μ_B state is characterized. The superconducting order parameter is proven to continuously change from a nodal to a fully gapped s-wave like Fermi surface in the superconducting regime as a function of x, partially investigated on (O,F) substituted samples. LiOHFeSe is one of the novel intercalated FeSe compounds, showing strongly increased T_C = 43 K mainly due to increased interlayer spacing and resulting two-dimensionality of the Fermi surface. The primary interest of the samples of this thesis is the simultaneously observed ferromagnetism and superconductivity. The local probe techniques prove that superconducting sample volume gets replaced by ferromagnetic volume. Ferromagnetism arises from magnetic order with T_C = 10 K of secondary iron in the interlayer. The tendency of this system to show (Li,Fe) disorder is preserved upon (Se,S) substitution. However, superconductivity gets suppressed. The results of Mössbauer spectroscopy indicate that the systems tends to a secondary structural phase, where the local iron environment observed in pure FeS is absent. Moreover, two interlayer positions of the iron are identified. The absence of enhanced superconducting T_C in LiOHFeS thus is related to a structural instability. Also, in CuFeAs the role of secondary iron at the Cu position turns out to be decisive for the observed magnetic behaviour. As in LiOHFeSe, it orders ferromagnetically at T_C ~ 11 K and superimposes with the magnetic instability of the main iron site. It is shown that a small charge doping of 0.1e/Fe, which is expected from (Cu,Fe) disorder, is sufficient to switch the system between a paramagnetic and an AFM ground state. Both magnetic orders are indistinguishable, because the magnetic order parameters are strongly coupled. This coupling was observed in the structurally identical CuFeSb, where the magnetic order parameters of both iron sites scale perfectly. The magnetically unstable CuFeAs and the ferromagnetic CuFeSb can be classified according to the theory of As height driven magnetism, predicting a change from paramagnetism to AFM and finally FM with increasing As height.

Made available in DSpace on 2014-12-17T15:48:03Z (GMT). No. of bitstreams: 1 AlexandreSGV_DISSERT.pdf: 2732563 bytes, checksum: ab07c81d7e941ed2d721415180865feb (MD5) Previous issue date: 2012-05-25 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / Software Products Lines (SPL) is a software engineering approach to developing software system families that share common features and differ in other features according to the requested software systems. The adoption of the SPL approach can promote several benefits such as cost reduction, product quality, productivity, and time to market. On the other hand, the SPL approach brings new challenges to the software evolution that must be considered. Recent research work has explored and proposed automated approaches based on code analysis and traceability techniques for change impact analysis in the context of SPL development. There are existing limitations concerning these approaches such as the customization of the analysis functionalities to address different strategies for change impact analysis, and the change impact analysis of fine-grained variability. This dissertation proposes a change impact analysis tool for SPL development, called Squid Impact Analyzer. The tool allows the implementation of change impact analysis based on information from variability modeling, mapping of variability to code assets, and existing dependency relationships between code assets. An assessment of the tool is conducted through an experiment that compare the change impact analysis results provided by the tool with real changes applied to several evolution releases from a SPL for media management in mobile devices / Linhas de Produtos de Software (LPS) consiste em um paradigma de desenvolvimento de software, no qual fam?lias de sistemas compartilham caracter?sticas comuns e tornam expl?citas outras caracter?sticas que variam de acordo com o sistema final sendo considerado. Esta abordagem oferece benef?cios ao desenvolvimento de software como redu??o de custos, qualidade do produto final, produtividade e tempo de desenvolvimento reduzido. Por outro lado, a abordagem imp?e novos desafios para a atividade de evolu??o dos artefatos que modelam e implementam a LPS. Trabalhos de pesquisa recentes prop?em abordagens com suporte automatizado de ferramentas de an?lise de impacto de mudan?a no contexto de evolu??o de LPSs. Tais abordagens s?o baseadas em t?cnicas de an?lise de impacto de mudan?as e rastreabilidade de artefatos, por?m apresentam limita??es quanto ? an?lise de impacto de mudan?as em variabilidades de granularidade fina, bem como ? customiza??o dos tipos e estrat?gias de an?lise realizadas. Esta disserta??o prop?e uma ferramenta de an?lise de impacto de mudan?a, denominada Squid Impact Analyzer, que utiliza uma estrat?gia de estimativa de impacto baseada em informa??es de caracter?sticas, mapeamento de tais caracter?sticas em artefatos de c?digo, e depend?ncia existente entre artefatos de implementa??o. A ferramenta ? avaliada atrav?s da condu??o de experimentos que realizam a quantifica??o de m?tricas de cobertura, precis?o e m?dia harm?nica nos resultados de buscas de an?lise de impacto de mudan?a da ferramenta proposta em contraposi??o ?s mudan?as reais realizadas nos artefatos de diversas vers?es de evolu??o de uma LPS para gerenciamento de m?dias em dispositivos m?veis. A ferramenta foi desenvolvida com base em uma infraestrutura que serve de base para a instancia??o de ferramentas de an?lise de propriedades de c?digo de LPSs, e que ? tamb?m parte da contribui??o da disserta??o

CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Atualmente, muitos trabalhos técnicos e científicos importantes só são possíveis com o auxílio de computadores e de programas específicos. Na Engenharia Elétrica esses recursos são utilizados em estudos estáticos e dinâmicos de sistemas elétricos de potência, os quais dão suporte, por exemplo, ao planejamento e a operação da rede elétrica realizados pelas empresas do setor. Em função dessa importância é grande a quantidade de programas disponíveis, comerciais ou não. As aplicações comerciais são conhecidas por serem computacionalmente eficientes, bem como pela quantidade de recursos oferecidos, mas apesar disso, não são adequadas para fins educacionais ou para a realização de pesquisas. Um dos principais motivos apontados é porque o código fonte não é fornecido, e assim não podem ser estudados ou adaptados conforme a necessidade. Por isso muitos usuários principalmente do meio acadêmico preferem criar suas próprias aplicações, sendo a maioria delas desenvolvidas no MATLAB ou escritas nas linguagens de programação FORTRAN e C++. Esses programas são disponibilizados como aplicações desktop destinadas geralmente a somente um tipo de estudo e com uma interface pouco amigável. Entretanto, existem algumas opções com características mais atrativas como a existência de uma interface gráfica com o usuário, e número de recursos computacionais próximos àqueles encontrados nas aplicações comercias. Na literatura há ainda propostas de aplicações web cuja principal vantagem é o acesso remoto e simultâneo por qualquer computador. No geral, as aplicações existentes não disponibilizam recursos de colaboração em tempo real, e não permitem a interoperabilidade com outras aplicações. Nesse contexto, esta tese focou na investigação da implementação de uma aplicação web para a análise de sistemas elétricos, explorando esses dois aspectos supracitados. Para isso alguns programas similares, sem fins comerciais e com código fonte disponível, foram investigados. E também foram selecionadas e apresentadas as ferramentas computacionais necessárias ao desenvolvimento da aplicação. As investigações e as implementações computacionais realizadas, bem como os resultados obtidos são devidamente apresentados e analisados ao final deste trabalho. / Currently, many important technical and scientific works are only possible with the aid of computers and specific programs. In Electrical Engineering, these resources are both used in static and dynamic studies of electric power systems, which give support, for example, to the planning, and operation of the grid performed by companies in the sector. Because of this, there is a large number of commercial or non-commercial programs available. Commercial applications are known to be computationally efficient as well as the amount of offered resources; nevertheless, they are not suitable for educational purposes or for conducting research. One of the main reasons pointed out is because they are not open source, and thus they cannot be studied or adapted as needed. Thus, many users, quite often in academia, prefer to create their own applications, most of them written in MATLAB, FORTRAN and C ++ programming languages. These programs are provided as desktop applications usually designed to only one type of study and without user-friendly interface. However, there are a few options with more attractive features such as the existence of a graphical user interface, and number of computational resources close to those found in commercial applications. There are also proposals in the literature for web applications whose main advantage is the remote and simultaneous access by any computer. Generally, the existing applications do not make available real-time collaboration features, and no interoperability with other applications. In this context, this thesis focused on the research of the implementation of a web application for analysis of electrical power systems, exploring these two aspects above mentioned. For that, some similar non-commercial programs and open-source were deeply investigated. In addition, the computational tools necessary to develop the application were selected and presented. The investigations and computational implementation performed here, as well as the results are properly presented and analyzed at the end of this work. / Tese (Doutorado)

In this thesis the superconducting and magnetic phases of LiOH(Fe,Co)(Se,S), CuFeAs/CuFeSb, and LaFeP_1-xAs_xO - belonging to the 11, 111 and 1111 structural classes of iron-based arsenides and chalcogenides - are investigated by means of 57Fe Mössbauer spectroscopy and muon spin rotation/relaxation (μSR). Of major importance in this study is the application of high magnetic fields in Mössbauer spectroscopy to distinguish and characterize ferro- (FM) and antiferromagnetic (AFM) order. A user-friendly Mössbauer data analysis program was developed to provide suitable model functions not only for high field spectra, but relaxation spectra or parameter distributions in general. In LaFeP_1-xAs_xO the reconstruction of the Fermi surface is described by the vanishing of the Γ hole pocket with decreasing x. The continuous change of the orbital character and the covalency of the d-electrons is shown by Mössbauer spectroscopy. A novel antiferromagnetic phase with small magnetic moments of ~ 0.1 μ_B state is characterized. The superconducting order parameter is proven to continuously change from a nodal to a fully gapped s-wave like Fermi surface in the superconducting regime as a function of x, partially investigated on (O,F) substituted samples. LiOHFeSe is one of the novel intercalated FeSe compounds, showing strongly increased T_C = 43 K mainly due to increased interlayer spacing and resulting two-dimensionality of the Fermi surface. The primary interest of the samples of this thesis is the simultaneously observed ferromagnetism and superconductivity. The local probe techniques prove that superconducting sample volume gets replaced by ferromagnetic volume. Ferromagnetism arises from magnetic order with T_C = 10 K of secondary iron in the interlayer. The tendency of this system to show (Li,Fe) disorder is preserved upon (Se,S) substitution. However, superconductivity gets suppressed. The results of Mössbauer spectroscopy indicate that the systems tends to a secondary structural phase, where the local iron environment observed in pure FeS is absent. Moreover, two interlayer positions of the iron are identified. The absence of enhanced superconducting T_C in LiOHFeS thus is related to a structural instability. Also, in CuFeAs the role of secondary iron at the Cu position turns out to be decisive for the observed magnetic behaviour. As in LiOHFeSe, it orders ferromagnetically at T_C ~ 11 K and superimposes with the magnetic instability of the main iron site. It is shown that a small charge doping of 0.1e/Fe, which is expected from (Cu,Fe) disorder, is sufficient to switch the system between a paramagnetic and an AFM ground state. Both magnetic orders are indistinguishable, because the magnetic order parameters are strongly coupled. This coupling was observed in the structurally identical CuFeSb, where the magnetic order parameters of both iron sites scale perfectly. The magnetically unstable CuFeAs and the ferromagnetic CuFeSb can be classified according to the theory of As height driven magnetism, predicting a change from paramagnetism to AFM and finally FM with increasing As height.:1 Acronyms and Symbols 2 Introduction 3 Iron-based arsenides and chalcogenides 3.1 Structural properties 3.2 Electronic properties 3.2.1 Magnetism 3.2.2 Superconductivity 3.2.3 Nematic phase 3.3 Investigated samples 4 Moessfit - a free Mössbauer fitting program 4.1 Aspects of program design 4.2 Errors 4.2.1 Uncorrelated 4.2.2 Hesse 4.2.3 MonteCarlo 4.2.4 Minos 4.3 Fitting algorithm 4.4 Maximum entropy method (MEM) 4.5 Kolmogorov-Smirnov confidence 5 Mössbauer spectroscopy 5.1 Mössbauer effect 5.2 Relativistic Doppler effect 5.3 Full static Hamiltonian 5.3.1 Quadrupole interaction 5.3.2 Isomer shift. 5.3.3 Zeeman splitting 5.3.4 Combined interaction 5.3.5 Transition probabilities 5.3.6 The magic angle 5.4 Transmission integral 5.4.1 Absorption area 5.4.2 Ideal thickness 5.4.3 Line width and line shape 5.4.4 Levelling 5.5 Applied field measurements of powder samples 5.5.1 Paramagnet, axial symmetric EFG in transverse field geometry 6 5.5.2 Uniaxial antiferromagnet, axial symmetric EFG in transverse field geometry 6 5.5.3 Paramagnet, axial symmetric EFG in longitudinal field geometry 6 5.5.4 Uniaxial ferromagnet, axial symmetric EFG in transverse field geometry 6 5.5.5 Polarised photons 5.5.6 Total absorption cross section 5.5.7 Polarised sources 5.6 Blume line shape model 6 μSR 6.1 Muon decay and detection 6.2 Magnetic order and dynamic relaxation 6.2.1 Magnetic order 6.2.2 Time dependent field distributions 6.2.3 Aspects of μSR in iron-based arsenides and chalcogenides 6.2.4 Weak transverse field (WTF) 6.3 Superconductivity - transverse field (TF) experiments 7 Intercalated FeSe 7.1 Bulk properties: XRD, susceptibility, resistivity 7.2 Structural characterization 7.3 LiOHFeSe - Mössbauer spectroscopy 7.3.1 Applied transverse field 7.4 LiOHFeSe - μSR 7.4.1 Zero field (ZF) 7.4.2 Pinning experiment 7.4.3 Transverse field (TF) 7.5 Mössbauer investigation of LiOHFe_1-yCo_ySe_1-xS_x. 7.6 Discussion 8 LaFeO(As,P) 8.1 Preliminary measurements and electronic structure calculations 8.2 Mössbauer spectroscopy 8.3 μSR 8.3.1 Magnetic characterization 8.3.2 Spin dynamics 8.3.3 Superconductivity 8.4 Discussion 9 CuFeAs and CuFeSb 9.1 Preliminary results of CuFeAs and CuFeSb 9.2 CuFeAs: Mössbauer spectroscopy 9.2.1 Zero field (ZF) 9.2.2 Longitudinal field (LF) 9.2.3 Transverse field (TF) 9.3 CuFeAs: μSR 9.3.1 Zero field (ZF) 9.3.2 Weak transverse field (WTF) 9.4 Further investigations on CuFeAs 9.4.1 Neutron scattering 9.4.2 Theoretical calculation 9.4.3 Local element analysis with EDX/WDX 9.5 CuFeSb: Mössbauer spectroscopy 9.5.1 Zero Field (ZF) 9.5.2 Transverse field (TF) 9.6 Discussion 10 Conclusion 11 Appendix 11.1 Derivation of the quadrupole interaction and isomer shift 11.2 Matrix form of the static nuclear Hamiltonian 11.3 Mössbauer line intensities 11.4 Blume line shape model 11.4.1 Special case: two states with diagonal Hamiltonians 11.5 Moessfit models 11.5.1 FeSe_1-xS_x(Li_1-zFe_zOH) ZF, standard 11.5.2 FeSe_1-xS_x(Li_1-zFe_zOH) ZF, 4 fractions 11.5.3 FeSe_1-xS_x(Li_1-zFe_zOH) Pinning 11.5.4 FeSe_1-xS_x(Li_1-zFe_zOH) TF 11.5.5 FeSe_1-xS_x(Li_1-zFe_zOH) CS-Vzz-MEM 11.5.6 LaFeP_1-xAs_x+ ferrocene, ZF 11.5.7 LaFeP_1-xAs_x+ ferrocene, LF 11.5.8 LaFeP_1-xAs_x+ iron foil, ZF 11.5.9 LaFeAsO ZF 11.5.10 LaFeAsO TF 11.5.11 CuFeAs + ferrocen, ZF 11.5.12 CuFeAs + ferrocen, ZF, high statistics 11.5.13 CuFeAs + ferrocen, LF 11.5.14 CuFeAs + ferrocen, TF 11.5.15 CuFeSb ZF 11.5.16 CuFeSb TF

This work deals with Multi-Criteria Analysis which represents an effective tool for solving complex decision-making situations. This paper describes the various methods of multi-criteria evaluation. One of the chapters also focuses on the software support. The main objective of this document is to demonstrate how to apply Multi-Criteria Analysis in real life. The practical part of this study refers to the structural policy and deals with the evaluation of regions of the Czech Republic after its entry into the European Union. The study mainly concentrates on the detailed analysis of South Bohemia region.

This thesis deals with the development of application for fundamental analysis of stocks. Main goal of the thesis is to make application, which will be helpful for individual investors in performing fundamental analysis of stocks. It is desktop application, which performs calculations with high precision and it uses free on-line sources of financial data. The application was developed in Java programming language. It will be available as a~freeware alternative to proprietary fundamental analysis software on the market. The first part describes capital market and stock exchange, makes characteristics of stock and explains principle of fundamental analysis of stocks. In the second part, the market research of fundamental analysis software was realized, design and implementation of the application for fundamental analyiss was described and the application was evaluated.

<p dir="ltr">Historically, CIOs have struggled to realize IT investment values and planning involved. In the IT industry, these issues have become a critical C-level topic (Haffke, 2016). Since the establishment of the position of the State Chief Information Officer (CIO), CIO roles have expanded and evolved tremendously as new modern technologies became a part of organization’s information technology (IT) enterprise infrastructure. Multiple State CIOs struggled with modern IT technologies, but successfully completed projects to meet customer business needs and requirements and furthermore, IT investments involved an arduous effort to prepare, execute, complete, and assess for return on investment (ROI) and value realization (NASCIO, 2021). During the COVID-19 pandemic, implementation of remote collaboration technology allowed the workforce to perform at remote locations to prevent spread of the virus. Academic research on the topic of State CIO’s involvement in IT strategic planning is limited and yields scarce search results compared to other subject areas. State CIOs’ involvement in IT strategic planning was further researched for enabling remote collaboration for the new remote workforce. Scholarly databases and more than 100 various sources of articles were reviewed for search results that addressed the problem and purpose of this research.<b> </b>Grounded theory research, data triangulation, and Computer-Assisted Qualitative Data Analysis software (CAQDAS) were used to analyze the resulting articles. The research deliverables included a document analysis of State CIO involvement in IT strategic planning to enable remote collaboration. There were significant involvements of State CIOs in IT strategic planning to enable remote collaboration during the COVID-19 pandemic across the analyses. This study developed a course of actions (COAs) for State CIOs, and recommendations for future research.</p>

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