The thesis focuses on analysis of Robert Hildprandt's breeding program in Blatná estate in period of Czechoslovakia. The time range is influenced by the character of source-books that contains information from the years 1922-1930, eventually 1907-1935. The main sources include evidence resources, especially studbooks, milk yield tests, register of calves or breeding index and preserved correspondence of the estate. According to these sources is characterized the breeding of black-piabald lowland cattle, performance testing and results of breeding program. The evolution of the breeding herd in Blatná estate is compared with both general rules of breeding in Czechoslovak era and other development of different breeds and other regions. On the basis of studbooks, there is also elaborated historical-antropological analysis of names and describtions of individual animals.

Made available in DSpace on 2014-10-09T12:41:58Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:04:38Z (GMT). No. of bitstreams: 0 / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

As the Internet has become increasingly important for people and for businesses that rely on it to create revenue, Internet unavailability can have major consequences. A common cause to unavailability is performance related problems. In order to evade such problems, the system’s quality characteristics in terms of performance need to be evaluated, which is commonly done with performance testing. When performance tests are conducted, the system under test is driven by an artificial workload or a sample of its natural workload while performance related metrics are measured. The workload is a very important aspect of performance testing, proved by measured performance metrics being directly dependent on the workload processed by the system under test. In order to conduct performance tests with representative workloads, the concept of workload modelling should be considered. Workload models attempt to model all relevant features of the workload experienced by a system within a given period of time. A workload model is created by set of consecutive activities that together constitute a process. This explorative feasibility study focuses on exploring, describing and evaluating the feasibility of a tool for automating the process of modelling Web server workloads for performance testing. A literature review was conducted in this student thesis, from which a research model was developed that describes the key factors in the process of modelling Web server workloads for performance testing, the relationships between these factors and their variables. The key factors constitute of four sub-processes and the relationships between them are the sequence flow, i.e. the order of events in the process. The process is initiated by the sub-process Establish Workload Data, where the workload data are retrieved and sanitised. The workload data are then categorised in homogeneous groups called workload entities, which is done in the Identify Workload Entities sub-process. Each workload entity has some associated workload attributes that are identified in the Identify Workload Attributes sub-process. In the last sub-process, Represent Workload, statistical methods, such as standard deviation and arithmetic mean, are applied in order to represent the workload in graphs and tables. Based on the research model and in order to evaluate the feasibility of a tool, a prototype was developed. The feasibility was evaluated through analysis of the primary empirical data, collected from an interview with a field expert who had tested the prototype. The analysis indicated that developing a tool for automating the process of modelling Web server workloads for performance testing is indeed feasible, although some aspects should be addressed if such a tool was to be realised. Analysis implied that an important aspect of modelling Web server workloads for performance testing is that the modeller must be in controller of what is being modelled. The prototype that was developed is highly static, i.e. it is not possible to create customised workload models. Therefore, if the tool is going to be realised, functionality for customising workload models should be added to the tool. Another important aspect that should be addressed if the tool is going to be realised is graphical representation of multiple workload attributes. The analysis indicated that there might be correlations between workload attributes. It is therefore important to be able to graphically represent multiple workload attributes together so that such correlations can be identified.

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This study sought to assess the performance of students entering and graduating from graduate courses and Bachelor's degree in chemistry from Brazil, in the national examination performance of students (ENADE) in 2011 and 2014, with a view to identify whether the higher education courses in Chemistry provides students the development of critical thinking skills. The study is based on a documentary research, developed through the mixed method, from the concomitant triangulation strategy, in which the issues were used to General knowledge of the ENADE and micro-data on these issues that are provided by the National Institute of studies and research Anísio Teixeira (INEP). The classification of objective issues of general training of ENADE-2011 and 2014, according to the taxonomy of critical thinking. From this classification, worked with the performance variable, corresponding to the grades obtained by the students on the issues, relating it to three independent variables: i) course (baccalaureate and teaching licensure, whereas students freshmen and seniors); II) institution (public or private) and iii) school (public or private). Employed the Chi-square test for the analysis of these pairs, in order to identify which variable is more relevant to the students ' performance on issues that demand critical thinking capabilities. With the analysis made, it was found that the issues require critical thinking skills to your resolution and in variable course, graduating students of both courses feature superior performance. In the institution, when students are owned by private institutions of higher education, students graduating graduation exhibit superior performance, even when the students are in public institutions, the freshmen have a greater emphasis on performance. In the school, students of public schools demonstrate better performance when they are seniors. Students who come from private schools, have a superior performance when they are entering. With regard to data observed for the year 2011, no statistically significant difference was identified in any of the comparisons made between freshmen and graduates students, independent of the variable used. / Nesta pesquisa buscou-se avaliar o desempenho dos estudantes ingressantes e concluintes dos cursos de Licenciatura e Bacharelado em Química do Brasil, no Exame Nacional de Desempenho dos Estudantes (ENADE), nos anos de 2011 e 2014, na perspectiva de identificar se os cursos de formação superior em Química propiciam nos estudantes o desenvolvimento de capacidades de pensamento crítico. O estudo é embasado em uma pesquisa documental, desenvolvida por meio do método misto, a partir da estratégia de triangulação concomitante, em que foram utilizadas as questões de conhecimento geral do ENADE e os microdados sobre estas questões que são disponibilizados pelo Instituto Nacional de Estudos e Pesquisas Anísio Teixeira (INEP). Foi realizada a classificação das questões objetivas de formação geral do ENADE-2014 e 2011, de acordo com a Taxonomia do Pensamento Crítico. A partir dessa classificação, trabalhou-se com a variável de desempenho, correspondente as notas obtidas pelos estudantes nas questões, relacionando-a com três variáveis independentes: i) curso (bacharelado e licenciatura, considerando estudantes ingressantes e concluintes); ii) instituição (pública ou privada) e iii) escola (pública ou privada). Empregou-se o teste de quiquadrado para a análise desses pares, a fim de identificar qual variável é mais relevante para o desempenho dos estudantes em questões que possivelmente demandam capacidades do pensamento crítico. Com as análises efetuadas, verificou-se que as questões demandam capacidades do pensamento crítico para a sua resolução e, que na variável curso, os estudantes concluintes de ambos cursos apresentam desempenho superior. Na variável instituição, quando os estudantes são pertencentes a IES privadas, os estudantes concluintes da licenciatura apresentam um desempenho superior, já quando os estudantes são de IES públicas, os ingressantes apresentam um maior destaque no desempenho. Na variável escola, os estudantes de escolas públicas demonstram melhor desempenho quando são concluintes. Os estudantes que vieram de escolas privadas, apresentam um desempenho superior quando são ingressantes. No que se refere aos dados observados para o ano de 2011, não foi identificada diferença estatística significativa em nenhuma das comparações feitas entre estudantes ingressantes e concluintes, independente da variável utilizada. / São Cristóvão, SE

Made available in DSpace on 2014-10-09T12:41:58Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T14:04:38Z (GMT). No. of bitstreams: 0 / O ozônio (O3) é um dos poluentes que representa grande preocupação em termos de qualidade do ar na Região Metropolitana de São Paulo (RMSP). No ano de 2012 foram observados 98 dias de ultrapassagens do padrão horário da qualidade do ar para este poluente na RMSP. A exposição aos poluentes atmosféricos como O3 e outros está associada ao prejuízo da saúde respiratória. O enfoque deste estudo é determinar os principais Compostos Orgânicos Voláteis (COV) precursores de O3 para auxiliar no controle deste poluente. Neste trabalho foram realizadas 78 amostragens durante a semana de hidrocarbonetos no ano de 2006 e 66 amostragens de hidrocarbonetos, 62 de aldeídos e 42 de etanol durante o ano de 2011/2012, 7:00 h às 9:00 h, na estação CETESB IPEN/USP. Medidas de COV também foram realizadas no ano de 2006 e 2008, na Estação CETESB Cerqueira César. Adicionalmente, foram efetuados testes de emissões veiculares durante o ano de 2009 de 5 veículos a diesel, 3 a etanol, 2 a gasolina C e 1 motocicleta. O modelo de trajetórias OZIPR foi utilizado para determinar os principais precursores de O3. Durante o ano de 2011/2012, na Estação CETESB IPEN/USP, a classe de aldeídos representou 35,3% dos COV analisados em concentração na atmosfera, seguido pelo etanol 22,6%, compostos aromáticos 15,7%, alcanos 13,5%, cetonas 6,8%, alcenos 6,0% e alcadienos < 0,1%. Considerando a concentração dos compostos e sua reatividade, as simulações executadas com o modelo OZIPR mostraram que o acetaldeído contribuiu com 61,2% da formação do O3 na atmosfera da RMSP no ano de 2011/2012. Dos COV analisados, a classe dos aldeídos contribui com 74% da produção de O3, aromáticos 14,5%, alcenos 10,2%, alcanos 1,3% e alcadienos (isopreno) 0,03%. O estudo de emissão veicular mostrou que 39% dos aldeídos foram provenientes de veículos a etanol, 28% a diesel, 26% a gasolina C e 7% de motocicletas. As emissões dos COV por veículos a gasolina contribuíram com 44% da formação de O3, a diesel 22%, a etanol 19% e motocicletas 15%. / Tese (Doutoramento) / IPEN/T / Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

Submitted by Pedro Silva Filho (pfsilva@ipen.br) on 2017-10-09T18:35:29Z No. of bitstreams: 0 / Made available in DSpace on 2017-10-09T18:35:29Z (GMT). No. of bitstreams: 0 / Neste trabalho foram determinadas as condições para a soldagem de chapas grossas de aço carbono ASTM A36 com aço baixo-liga temperado e revenido ASTM A514 Grau Q empregando-se o processo arame tubular. Para tanto foram soldadas diversas peças de testes com o intuito de se avaliar as condições mais adequadas de preparação e soldagem de juntas dissimilares destes materiais. A preparação foi realizada por meio de corte térmico. A temperatura de preaquecimento foi determinada através de modelos matemáticos, pelas recomendações das normas AWS D1.1 e DIN EN 1011-2 sendo posteriormente avaliada por intermédio do teste de soldabilidade tipo CTS Controlled Thermal Severity. Os parâmetros de soldagem foram determinados a partir da qualificação de um procedimento de soldagem, conforme a norma AWS D1.1. Foram avaliadas as consequências do emprego do tratamento térmico de alívio de tensões após soldagem (TTAT), pelos testes de dureza Vickers e impacto Charpy. A caracterização microestrutural foi realizada por meio de microscopia óptica e microscopia eletrônica de varredura. A caracterização das superfícies oxicortadas evidenciou os efeitos da descarbonetação e também da carbonetação. A temperatura de pré-aquecimento de 160°C determinada por meio da metodologia recomendada pelas normas AWS D1.1 e DIN EN 1011-2 mostrou-se satisfatória nos testes de soldabilidade. Foi possível a qualificação do procedimento de soldagem (EPS) com requisitos de impacto na condição "como soldado", porém na condição "após TTAT", os baixos valores de tenacidade obtidos no metal de solda, inferiores a 27J, não permitiram a qualificação de uma EPS com requisitos de impacto. Foi observada a ausência de trincas intergranulares tanto na zona afetada pelo calor quanto no metal de base ASTM A514, porém foi revelada a presença de microfases frágeis no metal de solda na condição "como soldado", especificamente na região da raiz, intensificadas pelo efeito da diluição. O aumento do teor de carbono na raiz, a presença de microfases frágeis, a grande fração de grãos colunares e de ferrita proeutetóide combinados com a baixa fração de ferrita acicular no metal de solda contribuíram para os baixos valores de tenacidade encontrados na condição "como soldado". Após o TTAT observou-se uma queda acentuada da tenacidade, inferior a 27J, do metal de solda devido à fragilização provocada pela precipitação e coalescimento de carbonetos de ferro. / Dissertação (Mestrado em Tecnologia Nuclear) / IPEN/D / Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

Background: A real-time system operates with time constraints, and its correctness depends upon the time on which results are generated. Different industries use different types of real-time systems such as telecommunication, air traffic control systems, generation of power, and spacecraft system. There is a category of real-time systems that are required to handle millions of users and operations at the same time; those systems are called large scale real-time systems. In the telecommunication sector, many real-time systems are large scale, as they need to handle millions of users and resources in parallel. Performance is an essential aspect of this type of system; unpredictable behavior queue cost millions of dollars for telecom operators in a matter of seconds. The problem is that existing models for performance analysis of these types of systems are not cost-effective and require lots of knowledge to deploy. In this context, we have developed a performance simulator tool that is based on the XgBoost, Random Forest, and Decision Tree modeling. Objectives: The thesis aims to develop a cost-effective approach to support the analysis of the performance of large-scale real-time telecommunication systems. The idea is to develop and implement a solution to simulate the telecommunication system using some of the most promising identified factors that affect the performance of the system. Methods: We have performed an improvement case study in Ericsson. The identification of performance factors is found through a dataset generated in a performance testing session, the investigation conducted on the same system, and unstructured interviews with the system experts. The approach was selected through a literature review. Validation of the Performance Simulator performed through static analysis and user feedback received from the questionnaire. Results: The results show that Performance Simulator could be helpful to performance analysis of large-scale real-time telecommunication systems. Performance Simulator ability to endorse performance analysis of other real-time systems is a collection of multiple opinions. Conclusions: The developed and validated approach demonstrates potential usefulness in performance analysis and can benefit significantly from further enhancements. The specific amount of data used for training might impact the generalization of the research on other real-time systems. In the future, this study can establish with more numbers of input on real-time systems on a large scale.

Výkonností testování aplikací nabírá v poslední době na důležitosti během vývoje všeho druhu. Tato práce mapuje základy testování výkonu, které jsou aplikovatelné na libovolné aplikace a následně analýzuje testování výkonu komponent používaných v Messaging systémech a to konkrétně Apache ActiveMQ Artemis a Qpid-Dispatch. Využívané metody testování výkonu je zaměřeno zejména na Apache ActiveMQ Artemis pomocí systému Messaging Performance Tool s názvem Maestro. Práce navrhuje vylepšení této aplikace o rozšíření testování systému Qpid-Dispatch a její možnosti při automatizovaném testování. Řešení je demonstrováno na sérii experimentů s různými topologiemi. Výsledná zpráva závěrem vyhodnocuje navržené rozšíření systému Maestro, zhodnocuje výkon komponenty Qpid-Dispatch a rozvíjí myšlenky pro další rozšíření.

Táto práca predstavuje nástroj Perun-Blower, využívajúci perfblowing techniku: vkladanie šumu do funkcií testovaného programu a nasledovné vyhodnotenie vplyvu šumu na výkon programu na základe zozbieraných časových údajov týchto funkcií z behu programu. Implementácia je postavená na dynamickej binárnej inštrumentácii nástroja Pin. Zameriavame sa na hľadanie funkcií, ktoré majú vysoký vplyv na výkon a rovnako tak aj odhad potenciálneho zrýchlenia behu vlákna pri optimalizácii konkrétnej funkcie. Naviac sme rozšírili existujúci Trace collector používaný v nástroji Perun na zbieranie časových dát funkcií, o nový tzv. engine, ktorý je založený práve na nástroji Pin. Funkčnosť implementácie sme otestovali na dvoch netriviálnych projektoch, kde sme dokázali nájsť funkcie (1) so značným vplyvom na výkon, (2) s najvýznamnejším optimalizačným prínosom a (3) funkcie, ktorých degradácia spôsobí, že vykonávanie programu sa neskončí ani po niekoľkých hodinách.

The thesis describes movement optimization of a linear thermoelectric actuator that is used for operating floor heating valves in modern buildings. Featuring experimental nature, the thesis deals with a problem specified by an industrial company within the following steps; definition of possible solutions based on problem research, experimental verification of selected propositions, the best solution selection resulting from the analysis of executed measurements, final verification with all product versions, benchmarking.