Presented work covers one of the most important areas of OMG’s model driven architecture (MDA) – problems of object model transformations. Based on research of OMG specifications and other sources, author analyzes transformation process, states importance of modeling and metamodeling for designing of UML like modeling languages. Research work describes designed metamodels of experimental modeling languages: “Entity – process”, Java metamodel and relational metamodel. Author gives a short overview of model editors for these languages, created using EMF framework tools. Based on analysis, author describes very flexible architecture of model transformation implementation, based on filter and pipes architectural pattern. Usage of this architecture gives flexibility to transformation implementation and allows easy and straightforward decomposition of transformation to separate stages. Designed filter and pipes transformation architecture was used for experimental transformation implementation. Research work presents quality and quantity based results of experimental transformations.

This thesis study presents a software measurement program. The literature on software measurement is reviewed. Conditions for an effective implementation are investigated. A specific measurement system is designed and implemented in ASELSAN, Inc. This has involved organizational as well as technical work. A software tool has been developed to assist in aggregating measurements obtained from various CASE tools in use. Results of the implementation have started to be achieved. Lots of useful feedbacks have been returned to the organization as a result of analyzing of the measurement data.

abstract: The development of a Solid State Transformer (SST) that incorporates a DC-DC multiport converter to integrate both photovoltaic (PV) power generation and battery energy storage is presented in this dissertation. The DC-DC stage is based on a quad-active-bridge (QAB) converter which not only provides isolation for the load, but also for the PV and storage. The AC-DC stage is implemented with a pulse-width-modulated (PWM) single phase rectifier. A unified gyrator-based average model is developed for a general multi-active-bridge (MAB) converter controlled through phase-shift modulation (PSM). Expressions to determine the power rating of the MAB ports are also derived. The developed gyrator-based average model is applied to the QAB converter for faster simulations of the proposed SST during the control design process as well for deriving the state-space representation of the plant. Both linear quadratic regulator (LQR) and single-input-single-output (SISO) types of controllers are designed for the DC-DC stage. A novel technique that complements the SISO controller by taking into account the cross-coupling characteristics of the QAB converter is also presented herein. Cascaded SISO controllers are designed for the AC-DC stage. The QAB demanded power is calculated at the QAB controls and then fed into the rectifier controls in order to minimize the effect of the interaction between the two SST stages. The dynamic performance of the designed control loops based on the proposed control strategies are verified through extensive simulation of the SST average and switching models. The experimental results presented herein show that the transient responses for each control strategy match those from the simulations results thus validating them. / Dissertation/Thesis / Ph.D. Electrical Engineering 2011

Orientador: Vivaldo Fernando da Costa / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-06T02:46:18Z (GMT). No. of bitstreams: 1 Ayres_HugoMurici_M.pdf: 1495982 bytes, checksum: e8c830648b4338fd4c90f9c0921c63d5 (MD5) Previous issue date: 2005 / Resumo: Essa dissertação apresenta um estudo que avalia a e?ciência do controlador UPFC (Uni?ed Power Flow Controller) para o amortecimento de oscilações eletromecânicas sob condições de pequenas e grandes perturbações.Um modelo de injeção de potência utilizado para representar o UPFC é implementado no Modelo de Sensibilidade de Potência (MSP). As análises no domínio do tempo são realizadas com o programa PSAT (Power System Analysis Toolbox), no qual também são implementados os modelos do UPFC e do controlador POD (Power Oscillation Damping).Diversos controladores POD são projetados para a modulação de diferentes parâmetros do UPFC. A análise da estabilidade e o projeto dos estabilizadores são baseados em técnicas de resposta em freqüência e no tempo, assim como na técnica de análise modal. Os resultados obtidos revelam que o UPFC possui um grande potencial para a manutenção da estabilidade de ângulo de sistemas de potência quando equipado com controladores POD / Abstract: This dissertation presents a study assessing the effectiveness of the Unified Power Flow Controller (UPFC) for damping electromechanical oscillation under small-signal and large disturbances. A UPFC power injection model is implemented in the Power Sensitivity Model (PSM). The time domain analysis is carried out with the Power System Analysis Toolbox (PSAT) considering the UPFC and the POD controller models implemented. A number of Power Oscillation Damping (POD) controllers are designed in order to modulate different parameters of the UPFC. The stability analysis and the design of POD controllers are based on time and frequency response techniques. Modal analysis technique is also utilized. Results obtained reveal that the UPFC has a great potential to maintain the power system angle stability when it is equipped with POD controller / Mestrado / Energia Eletrica / Mestre em Engenharia Elétrica

Submitted by Teruyuki Morita (teruyuki.morita@gvmail.br) on 2013-02-22T11:46:37Z No. of bitstreams: 1 TERUYUKI MORITA TESE DOUTORADO 2013.pdf: 3162443 bytes, checksum: 13f4c5c6a5721021a5d6814cb120c1a4 (MD5) / Approved for entry into archive by Suzinei Teles Garcia Garcia (suzinei.garcia@fgv.br) on 2013-02-22T12:12:47Z (GMT) No. of bitstreams: 1 TERUYUKI MORITA TESE DOUTORADO 2013.pdf: 3162443 bytes, checksum: 13f4c5c6a5721021a5d6814cb120c1a4 (MD5) / Made available in DSpace on 2013-02-22T12:27:15Z (GMT). No. of bitstreams: 1 TERUYUKI MORITA TESE DOUTORADO 2013.pdf: 3162443 bytes, checksum: 13f4c5c6a5721021a5d6814cb120c1a4 (MD5) Previous issue date: 2013-02-07 / This doctoral dissertation aims to expand the scope and application of SODA maps, preserving the originally developed methodology. We start with a review of the method, addressing jointly the SODA´s seminal articles, the Kelly´s psychological theory and the graph theory, and at the end we propose an identity between the concepts of SODA maps with explicit and tacit knowledge, from de knowledge management field (KM). This introductory sequence is completed with a vision of how the SODA maps have been applied. In the next stage we critically examine some points of the method that gives ambiguous interpretation. On these points we propose the application of theories from several fields, such as means-end theory (Marketing), the attribution theory and the concepts of attitude (Psychology), allowing inferences that lead us to the proposition of the first thesis : SODA maps are descriptors of attitudes. The next stage continues critically analyzing the method, and focuses on the paradigm established by Eden, which does not give the status of behavior descriptors. We propose here a change of paradigm, adopting the theory of communicative action (HABERMAS). Over this framework we build a prescriptive method, based on the theory of action and the ladder of inference (Action Science) and a theory of emotion (neuroscience), which allows us new inferences, leading to the proposition of the second thesis: SODA maps can describe behaviors. These two theses are the basis for the proposition to extending the SODA method scopes. It is proposed here the use of the theory of deterministic finite-state machines, called here automaton. We demonstrate a mapping between automaton with SODA maps, getting the SODA automaton, and over them we performed the last contribution, a hierarchy of SODA maps, which will enable the description of sequences of reasoning, ordering deterministically attitudes and behaviors, in a structured way. A vision of how it can be applied is performed through a case study. / Este trabalho de tese tem por objetivo ampliar o alcance e aplicação de mapas SODA, preservando a metodologia originalmente desenvolvida. Inicialmente é realizada uma revisão do método, abordando de forma conjunta os artigos seminais, a teoria psicológica de Kelly e a teoria dos grafos; e ao final propomos uma identidade entre construtos de mapas SODA com os conhecimentos tácitos e explícitos, da gestão do conhecimento (KM). Essa sequencia introdutória é completada com uma visão de como os mapas SODA tem sido aplicado. No estágio seguinte o trabalho passa a analisar de forma crítica alguns pontos do método que dão margens a interpretações equivocadas. Sobre elas passamos a propor a aplicação de teorias, de diversos campos, tais como a teoria de means-end (Marketing), a teoria da atribuição e os conceitos de atitude (Psicologia), permitindo inferências que conduzem à proposição da primeira tese: mapas SODA são descritores de atitudes. O próximo estágio prossegue analisando criticamente o método, e foca no paradigma estabelecido por Eden, que não permite conferir ao método o status de descritor de comportamento. Propomos aqui uma mudança de paradigma, adotando a teoria da ação comunicativa, de Habermas, e sobre ela prescrevemos a teoria da ação e da escada da inferência (Action Science) e uma teoria da emoção (neuro ciência), o que permite novas inferências, que conduzem à proposição da segunda tese: mapas SODA podem descrever comportamentos. Essas teses servem de base para o alargamento de escopos do método SODA. É proposta aqui a utilização da teoria de máquinas de estado finito determinístico, designadas por autômato. Demonstramos um mapeamento entre autômato com mapas SODA, obtendo assim o autômato SODA, e sobre ele realizamos a última contribuição, uma proposta de mapas SODA hierárquicos, o que vem a possibilitar a descrição de sequencias de raciocínio, ordenando de forma determinística atitudes e comportamentos, de forma estruturada. A visão de como ela pode ser aplicada é realizada por meio de estudo de caso.

Business process improvement for increased product quality is of continuous importance in the software industry. Quality managers in this sector need effective, hands-on tools for decision-making in engineering projects and for rapidly spotting key improvement areas. Measurement programs are a widespread approach for introducing quality improvement in software processes, yet employing all-embracing state-of-the art quality assurance models is labor intensive. Unfortunately, these do not primarily focus on measures, revealing a need for an instant and straightforward technique for identifying and defining measures in projects without resources or need for entire measurement programs. This thesis explores and compares prevailing quality assurance models using measures, rendering the Measurement Discovery Process constructed from selected parts of the PSM and GQM techniques. The composed process is applied to an industrial project with the given prerequisites, providing a set of measures that are subsequently evaluated. In addition, the application gives foundation for analysis of the Measurement Discovery Process. The application and analysis of the process show its general applicability to projects with similar constraints as well as the importance of formal target processes and exhaustive project domain knowledge among measurement implementers. Even though the Measurement Discovery Process is subject to future refinement, it is clearly a step towards rapid delivery of tangible business performance indicators for process improvement. / Vikten av förbättringar i affärsprocesser i syfte att öka produktkvaliteten i mjukvaruindustrin ökar stadigt. Kvalitetsansvariga i industrin behöver effektiva och påtagliga verktyg för beslutsfattande i utvecklingsprojekt och för lokalisering av förbättringsområden. Mätningsprogram är en utbredd ansats för kvalitetsförbättring i mjukvaruprocesser men användning av heltäckande kvalitetsmodeller är resurskrävande. Dessa fokuserar inte primärt på mätpunkter vilket blottar behovet av en snabb och direkt teknik för identifiering och definiering av mätpunkter i projekt som saknar resurser eller behov av heltäckande mätningsprogram. Denna uppsats undersöker och jämför rådande kvalitetssäkringsmodeller med mätpunkter, vilket resulterar i Measurement Discovery Process utifrån valda delar av PSM- och GQM-modellerna. Processen appliceras på ett industriellt projekt med nämnda förutsättningar, vilket skapar en uppsättning mätpunkter som sedan utvärderas. Detta ligger även till grund för utvärdering av Measurement Discovery Process. Appliceringen och utvärderingen av processen synliggör dess generella applicerbarhet på projekt med liknande begränsningar såväl som vikten av formella processer i målprojektet och omfattande domänkunskap hos de som implementerar mätningarna. Measurement Discovery Process är föremål för framtida förbättringar men samtidigt ett tydligt steg mot snabbt framtagande av konkreta prestandamått för kvalitetsförbättring i affärsprocesser. / Mattias Axelsson: +46 708 67 53 81 Johan Sonesson: +46 709 72 74 30 / +46 40 12 48 03

No description available.

Orientador: Vivaldo Fernando da Costa / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação / Made available in DSpace on 2018-08-08T01:39:36Z (GMT). No. of bitstreams: 1 Magalhaes_AlinedaSilva_M.pdf: 1630763 bytes, checksum: a79cfa073b1e00a5a037e569e5a09bac (MD5) Previous issue date: 2006 / Resumo: Esta dissertação apresenta um estudo que avalia o desempenho do PST (Phase Shifting Transformer), equipado com um controlador suplementar, para o amortecimento de oscilações eletromecânicas de baixa freqüência em sistemas de energia elétrica. O modelo dinâmico que representa o PST é implementado no Modelo de Sensibilidade de Potência (MSP). A análise da estabilidade e o projeto de estabilizadores POD (Power Oscillation Damping) são baseados em análise modal, bifurcações de Hopf, gráficos do lugar das raízes e técnicas de resposta em freqüência e no tempo. É investigado o desempenho de diferentes sinais de entrada para os controladores. Os resultados obtidos revelam que o PST, quando equipado com estabilizadores, possui um grande potencial para manutenção da estabilidade de ângulo a pequenas perturbações de sistemas elétricos de potência / Abstract: This dissertation presents an assessment of the performance of PST (Phase Shifting Transformer) equipped with a supplemental controller for damping power systems low-frequency electromechanical oscillations. The dynamic model that represents the PST is implemented in the Power Sensitivity Model (PSM). The stability analysis and the design of POD (Power Oscillation Damping) stabilizers are based on modal analysis, Hopf bifurcations, root locus plots and time and frequency response techniques. The performance of different input signals to the controllers is investigated. The results obtained reveal that the PST, when equipped with stabilizers, has a great potential for keeping power systems small-signal angle stability / Mestrado / Energia Eletrica / Mestre em Engenharia Elétrica

This qualitative study investigates which factors influence public service motivation among managers in the Swedish public sector. Specifically, it examens the impact of organizational, societal, and political factors on public service motivation. Conducted within a local authority facility, the study employs a thematic analysis of interviews with managers to derive its results. The findings indicate that organizational, societal, and political factors do influence public service motivation at the managerial level, although the extent of influence varies among individuals. Additionally, the study identifies various intrinsic motivation factors contributing to the experienced level of public service motivation. In conclusion, while this study sheds light in the manifestation of public service motivation among managers, it suggests further exploration through deeper studies to enhance the understanding in this area.

Attracting, motivating, and retaining public service employees continues to challenge both state- and municipal-level managers. Beginning with Perry’s (1996) public service motivation (PSM) construct, academics and practitioners focused considerable efforts in the identification of measures and factors influencing levels of motivation with the overall intent of identifying the key components of increasing employee motivations, thereby increasing the possibility of retaining the capable employees. While this effort has focused on managerial distinctions, groupings between genders, racial backgrounds, and tenure lengths, one significant comparison has yet to be explored—the public safety worker. Identifying and examining the motivating factors of police and fire, whose considerably different work requirements and consequences of subpar performance can result in the loss of life will not only lead to future means of addressing retention and motivation, but will also create a new avenue of research in public service motivation in public administration. Stemming from the extensive methodological work by Sangmook Kim (2010), this effort will explore the PSM constructs by utilizing exploratory factor analysis (EFA) to identify the significant factors of PSM for public safety workers, confirm these findings through confirmatory factor analysis (CFA), and identify the strengths of the various factors as they pertain to the latent constructs of PSM, job satisfaction, and organizational commitment. PSM, as it pertains to job attraction, selection, commitment, and retention plays a pivotal role in maintaining a productive and successful public organization. In Mississippi, retention and motivation are paramount as neighboring states pay better wages, offer similar benefits, and are within a short travel distance for many state employees. By comparing public safety workers to other groups of municipal employees, this research extends the field of public administration into new territory while providing practical, real-world tools for practitioners and decision-makers to utilize in workforce development and retention efforts. This research will show that there are significant differences between the public safety workers in the municipal workforce and non-public safety workers, particularly in Mississippi. The research shows that differences in public safety workers from non-public safety workers in motivation stem from levels of political involvement, compassion, benevolence, and duty.