This thesis is the summation of two publications with the motivation to move reliability analysis earlier in the design process. Current analyses aim to improve reliability after components have been selected. Moving specific analyses earlier in the design process reduces the cost to the designer. These early design analyses provide information to the designer so that critical design changes can be made to avoid failures. The first presents failure rates for function-flow pairs. These function-flow failure rates are used in the Early Design Reliability Method (EDRM) to calculate system level reliability during functional design. This methodology is compared to the traditional reliability block diagram for three examples to show its usefulness during early conceptual design. Next, an extension to the Function Failure Design Method (FFDM) is presented. A more robust knowledge base using Failure Mode/Mechanism Distributions 1997 (FMD-97) has been implemented. Then failure rates from Nonelectric Parts Reliability Data (NPRD-95) are added to more effectively determine the likelihood that a failure mode will occur. The proposed Functional Failure Rate Design Method (FFRDM) uses functional inputs to offer recommendations to mitigate failure modes that have a high likelihood of occurrence. This work uses a past example where FFDM and Failure Modes and Effects Analysis (FMEA) are compared to show that improvements have been made. A four step process is presented to show how the FFRDM is used during conceptual design. / Graduation date: 2012

Zugl.: Münster (Westfalen), Univ., Diss., 2008

Zugl.: Bochum, Universiẗat, Diss., 2009.

Zugl.: Clausthal, Techn. Univ., Diss., 2009

abstract: Data-driven applications are becoming increasingly complex with support for processing events and data streams in a loosely-coupled distributed environment, providing integrated access to heterogeneous data sources such as relational databases and XML documents. This dissertation explores the use of materialized views over structured heterogeneous data sources to support multiple query optimization in a distributed event stream processing framework that supports such applications involving various query expressions for detecting events, monitoring conditions, handling data streams, and querying data. Materialized views store the results of the computed view so that subsequent access to the view retrieves the materialized results, avoiding the cost of recomputing the entire view from base data sources. Using a service-based metadata repository that provides metadata level access to the various language components in the system, a heuristics-based algorithm detects the common subexpressions from the queries represented in a mixed multigraph model over relational and structured XML data sources. These common subexpressions can be relational, XML or a hybrid join over the heterogeneous data sources. This research examines the challenges in the definition and materialization of views when the heterogeneous data sources are retained in their native format, instead of converting the data to a common model. LINQ serves as the materialized view definition language for creating the view definitions. An algorithm is introduced that uses LINQ to create a data structure for the persistence of these hybrid views. Any changes to base data sources used to materialize views are captured and mapped to a delta structure. The deltas are then streamed within the framework for use in the incremental update of the materialized view. Algorithms are presented that use the magic sets query optimization approach to both efficiently materialize the views and to propagate the relevant changes to the views for incremental maintenance. Using representative scenarios over structured heterogeneous data sources, an evaluation of the framework demonstrates an improvement in performance. Thus, defining the LINQ-based materialized views over heterogeneous structured data sources using the detected common subexpressions and incrementally maintaining the views by using magic sets enhances the efficiency of the distributed event stream processing environment. / Dissertation/Thesis / Ph.D. Computer Science 2011

The increased adoption of business process management approaches, tools, and practices has led organizations to accumulate large collections of business process models. These collections can easily include from a hundred to a thousand models, especially in the context of multinational corporations or as a result of organizational mergers and acquisitions. A concrete problem is thus how to maintain these large repositories in such a way that their complexity does not hamper their practical usefulness as a means to describe and communicate business operations. This paper proposes a technique to automatically infer suitable names for business process models and fragments thereof. This technique is useful for model abstraction scenarios, as for instance when user-specific views of a repository are required, or as part of a refactoring initiative aimed to simplify the repository's complexity. The technique is grounded in an adaptation of the theory of meaning to the realm of business process models. We implemented the technique in a prototype tool and conducted an extensive evaluation using three process model collections from practice and a case study involving process modelers with different experience.

This thesis focuses on design and implementation of an ERP system, dedicated to support small farmers and their enterprises in crops production in the Czech republic. ERP system is divided into three bases. First of them aims on working with land blocks, the other one focuses on stock operations and the third one focuses on economical operations of small farmers. Based on the processed data, ERP system provides control of costs and yields of single land blocks. Furthermore, the ERP is dedicated for creation of crop rotation plans and a compliance of which it helps to keep track of. The system also provides desired data for management of farming control. The ERP system was being developed in cooperation with an entrepreneur Karel Procházka, further refered to as an authority, who was testing the final application. The ERP system was developed as an web application.

Objetos de Aprendizagem são recursos relevantes para ensejar a aprendizagem em função de seu caráter modular, pois permitem oferecer condições para uma atividade apoiada por recursos alocados por demanda face a necessidades específicas de uma turma ou aluno em particular. Essa característica é um elemento benéfico e facilitador, mas adiciona um aspecto que dificulta seu uso, derivado da dificuldade de localização do objeto de aprendizagem apropriado para necessidades específicas. Em decorrência, existe considerável esforço de investigação de estratégias para facilitar a localização e o acesso a Objetos de Aprendizagem (OA), adequados às necessidades de alunos e professores, pois a dificuldade em realizar esses processos ocasiona uma redução na frequência de utilização e reutilização dos mesmos em atividades pedagógicas. O local usual para armazenamento desses recursos é um Repositório de Objetos de Aprendizagem (ROA). No entanto, o uso dos objetos de aprendizagem ocorre mais frequentemente no contexto de Ambientes Virtuais de Aprendizagem (AVAs). Face a essas constatações, esse trabalho de pesquisa investigou estratégias para integrar um ROA a um AVA e como esta integração pode apoiar o professor e o aluno na construção e adaptação do plano de ensino e aprendizagem. Essa tese apresenta um referencial teórico sobre Repositórios de Objetos de Aprendizagem e Ambientes Virtuais de Aprendizagem e algumas soluções implementadas para integrar esses sistemas. Além disso, propõe um modelo de integração de repositórios a AVAs e descreve sua implementação bem como resultados derivados do uso da solução integradora construída. Os sistemas escolhidos para validar o modelo implementado foram o repositório CESTA2 e o AVA MOODLE. A hipótese principal é a de que a integração dos sistemas permite que os OA possam ser mais facilmente agregados pelo professor ao AVA no planejamento das unidades de aprendizagem de uma disciplina ou curso e permite que esses recursos sejam recomendados pelo professor ao aluno nas diversas situações de aprendizagem previamente delineadas em cada uma das unidades de aprendizagem ou que surgirem sob demanda ao longo do curso. Nesse sentido a solução proposta visa criar condições para que os OAs possam ser pesquisados e utilizados pelos alunos através de ferramentas disponíveis no próprio AVA. Para validar a integração foram realizados estudos de caso com alunos e professores de duas turmas da disciplina de Projeto de Banco de Dados Relacional do Instituto Federal Sul-rio-grandense, Campus Pelotas. Diferentemente de outros estudos realizados sobre o tema e relatados nessa tese, esse trabalho tem como foco a integração dos ambientes, com a finalidade tecnológica de verificar a interoperabilidade existente entre eles e como finalidade pedagógica verificar como essa integração pode auxiliar professores e alunos. A avaliação e validação realizadas através de estudo de caso com professores e alunos evidenciou que o modelo proposto e implementado atende às expectativas e pode apoiar professores e alunos, nas suas atividades pedagógicas e de aprendizagem, respectivamente. Além disso, o trabalho fruto dessa tese aporta contribuições importantes para as instituições de ensino que utilizam o software livre DSpace como repositório institucional e o MOODLE como AVA Institucional, pois demonstra como esses dois sistemas podem ser integrados para permitir aos seus usuários auferir todos os benefícios que essa integração pode oferecer. / Learning Objects are important resources to give opportunity to the learning according to their modular character, this way they may offer conditions to an activity supported by allocated resources by requests to the specific needs of a class or of an individual student. This characteristic is a beneficial and facilitator element, but it adds an aspect which makes its use difficult due to the learning object’s location difficulty appropriated to the specific needs. As a result, there is significant research effort of strategies in order to facilitate the location and the access to the Learning Objects (LO) adequate to the students and teachers’ needs, because the difficulty in order to perform these processes causes a decrease in the frequency of use and reuse from these ones in activities of teaching and learning. The usual place to store these resources is a Learning Objects Repository (LOR). However, the use of learning objects occurs more frequently in the Virtual Learning Environments (VLEs). Due to these findings, this study researched the strategies to integrate a Learning Objects Repository to a Virtual Learning Environment and how this integration may support the teacher and the student at the construction and adaptation of teaching and learning plan. The present thesis shows a theoretical frame about the Learning Objects Repository and Virtual Learning Environments and some solutions taken to integrate these systems. In addition, it proposes a integration model of repositories to VLEs and it describes its implementation as well as the results from the use of the integrating solution built. The systems chosen to validate the deployed model were the repository CESTA2 and the VLE MOODLE. The main hypothesis is that the integration of the systems allows that the Learning Objects may be more easily added by the teacher to the VLE at the learning unit planning to a subject our course and it allows that these resources be advised by the teacher to the student in several learning situations previously outlined in each learning unit or the ones which arises along the course. At this point of view the solution proposed aims to create conditions so that the LOs may be researched and used by the students through available tools at own VLE. In order to validate the integration were done case studies with students and teachers from two classes of Relational Database Project subject from the Instituto Federal Sul-rio-grandense, Pelotas Campus. Differently from other studies done about the topic and described at this thesis, this study focuses on the environment integration with the technological purpose in order to verify the interoperability presented between them and as teaching purpose to verify how this integration may help teachers and students. The assessment and validation performed through case study with teachers and students showed that the proposed and evidenced model meets the expectations and may support teachers and students in their teaching and learning activities, respectively. Furthermore, the study from this thesis brings important contributions to the educational institutions that use the DSpace free software as institutional repository and the MOODLE as Institutional VLE, showing how these two systems may be integrated allowing to their users all the benefits that this integration may offer.

Submitted by Raniere Barreto (raniere.barros@ufvjm.edu.br) on 2018-10-26T19:00:14Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) ediel_vieira_rangel.pdf: 2434430 bytes, checksum: 3ab41c4f702a86d0db14f67c7e17773f (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-11-10T10:44:53Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) ediel_vieira_rangel.pdf: 2434430 bytes, checksum: 3ab41c4f702a86d0db14f67c7e17773f (MD5) / Made available in DSpace on 2018-11-10T10:44:53Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) ediel_vieira_rangel.pdf: 2434430 bytes, checksum: 3ab41c4f702a86d0db14f67c7e17773f (MD5) Previous issue date: 2016 / Esta pesquisa visa ? reflex?o sobre a import?ncia da Comunica??o Cient?fica Eletr?nica e posterior cria??o de um buscador de metadados de reposit?rios institucionais brasileiros de Acesso Aberto, promovendo uma inova??o e integra??o da produ??o cient?fica das universidades e centros do Brasil. Considerando o crescimento da produ??o cient?fica e a sua democratiza??o na web, na contemporaneidade, surge a necessidade de um instrumento pragm?tico de organiza??o e busca de pesquisas cient?ficas brasileiras: o Repsit?riosBR.org. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Tecnologia, Sa?de e Sociedade, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / This research aims to reflect on the importance of Scientific Communication Electronics and subsequent creation of a search engine for metadata Brazilian institutional repositories of open access, promoting innovation and integration of scientific production of universities and centers of Brazil. Considering the growth of scientific production and its democratization on the web nowadays, there is the need for a pragmatic tool for organizing and finding Brazilian scientific research: the Repsit?riosBR.org.

Submitted by Raniere Barreto (raniere.barros@ufvjm.edu.br) on 2018-10-26T19:09:54Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) salim_ziad_pereira_aouar.pdf: 2148033 bytes, checksum: f729c379255dcdfbbd4d01425c314cc1 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-11-10T11:03:30Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) salim_ziad_pereira_aouar.pdf: 2148033 bytes, checksum: f729c379255dcdfbbd4d01425c314cc1 (MD5) / Made available in DSpace on 2018-11-10T11:03:30Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) salim_ziad_pereira_aouar.pdf: 2148033 bytes, checksum: f729c379255dcdfbbd4d01425c314cc1 (MD5) Previous issue date: 2016 / O trabalho em quest?o apresenta debates e o percurso de pesquisa na cria??o de um buscador de metadados de reposit?rios institucionais de Acesso Aberto de pa?ses da l?ngua portuguesa, promovendo uma inova??o na Comunica??o Cient?fica dos pa?ses. H? mais de tr?s s?culos os pesquisadores utilizam as revistas cient?ficas e as bibliotecas universit?rias para resguardar, divulgar, disseminar, validar, promover e repercutir os seus estudos e pesquisas, mas tamb?m como um banco de dados e propaga??o cient?fica para a cria??o de novos estudos a partir dessas difus?es cient?ficas. Com o exponencial crescimento da produ??o cient?fica e a sua propaga??o na internet, na virada do s?culo, como ferramenta de dissemina??o da produ??o cient?fica, surge a necessidade de um instrumento pragm?tico de organiza??o e busca de pesquisas cient?ficas dos pa?ses de l?ngua portuguesa: o Portal Caravela. / Disserta??o (Mestrado Profissional) ? Programa de P?s-Gradua??o em Tecnologia, Sa?de e Sociedade, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016. / The present study presents discussions and the research trajectory in creating an institutional repository metadata searcher of free access to Portuguese language countries, promoting an innovation on countries? scientific communication. For more than three centuries researchers have been using scientific magazines and college libraries to protect, disseminate, validate, promote and reflect their studies and researches, but also as a database and scientific spreading to new studies creation from these scientific dispersion. With the increasing growth of scientific production and its dissemination on the internet, in the turn of the century, as a dissemination tool of scientific production, a need of a pragmatic instrument of organization and scientific researches search arises from Portuguese language countries: The Portal Caravela.