<p>Haematology instruments using optical and fluorescence techniques have improved the platelet count in domestic animals. There are still some difficulties present, especially when counting cat thrombocytes due to their ability to aggregate and the occurrence of large platelets.</p><p>The objective of this study was to evaluate and compare the platelet count, mean platelet volume and platelet crit in dogs, horses and cats on Advia 2120 and Sysmex XT-2000iV.</p><p>Fresh blood samples from 64 dogs, 40 horses and 39 cats with various medical conditions were analysed on both instruments. Manual blood smears of all feline samples were scrutiniously analysed to evaluate the aggregation warning flag from Advia.</p><p>There was good agreement between the instruments for the optical platelet count in dogs and cats. Slightly higher values were reported from Advia. Samples from horses presented poor correlations for all studied parameters. Platelet clumps appeared in 70% of the 37 scrutinized feline blood smears, while 46% of the samples generated aggregation warning flags from the Advia instrument.</p><p>Advia and Sysmex showed good agreement for platelet counts in blood from dogs and cats. Mean platelet volume and platelet crit need further evaluation before conclusions can be made concerning their clinical relevance. The sensitivity of the platelet aggregation warning flag from the Advia instument needs further elevation.</p>

Submitted by PPG Comunica??o Social (famecos-pg@pucrs.br) on 2018-05-14T18:45:01Z No. of bitstreams: 1 LEANDRO_OLEG?RIO_DOS_SANTOS_TES.pdf: 5843434 bytes, checksum: 816065a5b49d892c1810bde1648953fe (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-05-18T12:48:22Z (GMT) No. of bitstreams: 1 LEANDRO_OLEG?RIO_DOS_SANTOS_TES.pdf: 5843434 bytes, checksum: 816065a5b49d892c1810bde1648953fe (MD5) / Made available in DSpace on 2018-05-18T13:00:52Z (GMT). No. of bitstreams: 1 LEANDRO_OLEG?RIO_DOS_SANTOS_TES.pdf: 5843434 bytes, checksum: 816065a5b49d892c1810bde1648953fe (MD5) Previous issue date: 2018-03-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The general objective of this doctorate thesis is to analyze the newsworthiness criteria used in the news reports featured on the television program Almo?o, from RBS TV Porto Alegre newsmaking on brazilian television. The chosen object of this study, featured on the leading broadcaster in Rio Grande do Sul, is the oldest on the local programming grid and has been on air for 46 years. In the context of convergence and digitization of journalistic processes, we try to answer as to how events promoted on social network conquer a news dimension on television. The Content Analysis of Laurence Bardin (2011) was used, with inspirations and approximations to the ethnomethodology of Alain Coulon (1995). In-depth i observation of the productive routine in the production and editing stages of the electronic magazine, between August and September 2017, to analyze the five news reports exhibited in the same data interpretation: news report analysis and interview analysis. The first having as registration units Criteria of Newsworthiness, Content Presence, News Reporting Time and Event Platform, and the second, Prac Accountability and Member Notion. In the broadcasters? search for a new connection with the audience, the results show that the hypertelevision paradigm causes newsworthiness criteria to change, modifying the jou a different news value. Reflecting upon the subject, we propose the identification of cyberevent phases to the journalistic agenda, experienced by television journalists / Esta tese de doutorado possui como objetivo geral analisar os crit?rios de noticiabilidade utilizados nas reportagens do programa Jornal do Almo?o, da RBS TV Porto Alegre, a partir da presen?a das redes sociais na constru??o da not?cia no telejornalismo brasileiro. O objeto escolhido est? h? 46 anos no ar, sendo o mais antigo da grade de programa??o local da emissora l?der de audi?ncia no Rio Grande do Sul. No contexto da converg?ncia e digitaliza??o dos processos jornal?sticos, procuramos responder como os acontecimentos divulgados nas redes sociais conquistam a dimens?o de not?cia na televis?o. Utilizamos a An?lise de Conte?do de Laurence Bardin (2011), com inspira??es e aproxima??es ? Etnometodologia de Alain Coulon (1995). Fizemos entrevistas em profundidade com profissionais da emissora, resultado da observa??o participante da rotina produtiva nas etapas de produ??o e de edi??o da revista eletr?nica, entre agosto e setembro de 2017, para an?lise do corpus de cinco reportagens exibidas no mesmo per?odo. Desse modo houve duas camadas de interpreta??o dos dados: an?lise das reportagens e an?lise das entrevistas. A primeira tendo como unidades de registro Crit?rios de Noticiabilidade, Presen?a do Conte?do, Tempo de Reportagem e Plataforma do Acontecimento, e a segunda, Pr?tica/Realiza??o, Indicialidade, Reflexividade, Accountability e No??o de Membro. Na busca das emissoras por uma nova conex?o com a audi?ncia, os resultados mostraram que o paradigma da hipertelevis?o provoca a altera??o dos crit?rios de noticiabilidade, modificando o fazer-jornal?stico, emergindo um novo valor-not?cia. Ao refletir sobre o tema, propomos a identifica??o das fases do ciberacontecimentos ? pauta, vivenciadas pelos telejornalistas

Submitted by PPG Comunica??o Social (famecos-pg@pucrs.br) on 2018-11-27T11:38:14Z No. of bitstreams: 1 LEANDRO_OLEG?RIO_DOS_SANTOS_TES.pdf: 5843434 bytes, checksum: 816065a5b49d892c1810bde1648953fe (MD5) / Approved for entry into archive by Sheila Dias (sheila.dias@pucrs.br) on 2018-11-27T13:24:14Z (GMT) No. of bitstreams: 1 LEANDRO_OLEG?RIO_DOS_SANTOS_TES.pdf: 5843434 bytes, checksum: 816065a5b49d892c1810bde1648953fe (MD5) / Made available in DSpace on 2018-11-27T15:56:17Z (GMT). No. of bitstreams: 1 LEANDRO_OLEG?RIO_DOS_SANTOS_TES.pdf: 5843434 bytes, checksum: 816065a5b49d892c1810bde1648953fe (MD5) Previous issue date: 2018-03-26 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The general objective of this doctorate thesis is to analyze the newsworthiness criteria used in the news reports featured on the television program Almo?o, from RBS TV Porto Alegre newsmaking on brazilian television. The chosen object of this study, featured on the leading broadcaster in Rio Grande do Sul, is the oldest on the local programming grid and has been on air for 46 years. In the context of convergence and digitization of journalistic processes, we try to answer as to how events promoted on social network conquer a news dimension on television. The Content Analysis of Laurence Bardin (2011) was used, with inspirations and approximations to the ethnomethodology of Alain Coulon (1995). In-depth i observation of the productive routine in the production and editing stages of the electronic magazine, between August and September 2017, to analyze the five news reports exhibited in the same data interpretation: news report analysis and interview analysis. The first having as registration units Criteria of Newsworthiness, Content Presence, News Reporting Time and Event Platform, and the second, Prac Accountability and Member Notion. In the broadcasters? search for a new connection with the audience, the results show that the hypertelevision paradigm causes newsworthiness criteria to change, modifying the jou a different news value. Reflecting upon the subject, we propose the identification of cyberevent phases to the journalistic agenda, experienced by television journalists. / Esta tese de doutorado possui como objetivo geral analisar os crit?rios de noticiabilidade utilizados nas reportagens do programa Jornal do Almo?o, da RBS TV Porto Alegre, a partir da presen?a das redes sociais na constru??o da not?cia no telejornalismo brasileiro. O objeto escolhido est? h? 46 anos no ar, sendo o mais antigo da grade de programa??o local da emissora l?der de audi?ncia no Rio Grande do Sul. No contexto da converg?ncia e digitaliza??o dos processos jornal?sticos, procuramos responder como os acontecimentos divulgados nas redes sociais conquistam a dimens?o de not?cia na televis?o. Utilizamos a An?lise de Conte?do de Laurence Bardin (2011), com inspira??es e aproxima??es ? Etnometodologia de Alain Coulon (1995). Fizemos entrevistas em profundidade com profissionais da emissora, resultado da observa??o participante da rotina produtiva nas etapas de produ??o e de edi??o da revista eletr?nica, entre agosto e setembro de 2017, para an?lise do corpus de cinco reportagens exibidas no mesmo per?odo. Dessa forma houve duas camadas de interpreta??o dos dados: an?lise das reportagens e an?lise das entrevistas. A primeira tendo como unidades de registro Crit?rios de Noticiabilidade, Presen?a do Conte?do, Tempo de Reportagem e Plataforma do Acontecimento, e a segunda, Pr?tica/Realiza??o, Indicialidade, Reflexividade, Accountability e No??o de Membro. Na busca das emissoras por uma nova conex?o com a audi?ncia, os resultados mostraram que o paradigma da hipertelevis?o provoca a altera??o dos crit?rios de noticiabilidade, modificando o fazer jornal?stico, emergindo um novo valor-not?cia. Ao refletir sobre o tema, propomos a identifica??o das fases do ciberacontecimentos ? pauta, vivenciadas pelos telejornalistas.

Haematology instruments using optical and fluorescence techniques have improved the platelet count in domestic animals. There are still some difficulties present, especially when counting cat thrombocytes due to their ability to aggregate and the occurrence of large platelets. The objective of this study was to evaluate and compare the platelet count, mean platelet volume and platelet crit in dogs, horses and cats on Advia 2120 and Sysmex XT-2000iV. Fresh blood samples from 64 dogs, 40 horses and 39 cats with various medical conditions were analysed on both instruments. Manual blood smears of all feline samples were scrutiniously analysed to evaluate the aggregation warning flag from Advia. There was good agreement between the instruments for the optical platelet count in dogs and cats. Slightly higher values were reported from Advia. Samples from horses presented poor correlations for all studied parameters. Platelet clumps appeared in 70% of the 37 scrutinized feline blood smears, while 46% of the samples generated aggregation warning flags from the Advia instrument. Advia and Sysmex showed good agreement for platelet counts in blood from dogs and cats. Mean platelet volume and platelet crit need further evaluation before conclusions can be made concerning their clinical relevance. The sensitivity of the platelet aggregation warning flag from the Advia instument needs further elevation.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-01-15T21:40:49Z No. of bitstreams: 1 VirginiaBezerraOliveiraCampos_DISSERT.pdf: 3793113 bytes, checksum: 4435d7d3c46fc8d73615a9b23cd0e5f4 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-01-17T15:55:28Z (GMT) No. of bitstreams: 1 VirginiaBezerraOliveiraCampos_DISSERT.pdf: 3793113 bytes, checksum: 4435d7d3c46fc8d73615a9b23cd0e5f4 (MD5) / Made available in DSpace on 2018-01-17T15:55:28Z (GMT). No. of bitstreams: 1 VirginiaBezerraOliveiraCampos_DISSERT.pdf: 3793113 bytes, checksum: 4435d7d3c46fc8d73615a9b23cd0e5f4 (MD5) Previous issue date: 2017-08-10 / A constante busca de materiais mais eficientes e com alto desempenho mec?nico, contribue efetivamente para a crescente demanda na utiliza??o de comp?sitos h?bridos. O processo de hibridiza??o pode propiciar melhoria significativa na combina??o global de propriedades, possibilitando assim aplica??es espec?ficas em elementos estruturais que requerem excel?ncia em suas propriedades mec?nicas e baixa massa espec?fica. Atrelado ? gradativa utiliza??o destes materiais, estudos que incidem nas previs?es de falha e, consequentemente, an?lises das cargas m?ximas que estes materiais podem suportar tornam-se essenciais para garantia da confiabilidade quanto a sua aplica??o. Neste sentido, a presente pesquisa buscou analisar o comportamento mec?nico de uma l?mina constitu?da ? base de tecido h?brido bidirecional (vidro/carbono) e resina ep?xi ?ster-vin?lica. Bem como, avaliar a representatividade de crit?rios de falhas desenvolvidos para comp?sitos unidirecionais quando aplicados em comp?sito h?brido de natureza bidirecional. A l?mina estudada foi caracterizada mecanicamente com base nos resultados obtidos pelos ensaios de tra??o e cisalhamento realizados em amostras com fibras de carbono orientadas a 0?, 30?, 45?, 60? e 90?. Observou-se a partir destes ensaios que materiais com fibras em ?ngulos fora do eixo (off-axis) de aplica??o de carga apresentam resist?ncia menor, embora apresentem maiores alongamentos, quando comparados a amostras com fibras alinhadas na dire??o principal do carregamento. Os dados experimentais referentes ?s propriedades cisalhantes, normatizados pela ASTM D3518M-13 (ensaio de cisalhamento por tra??o ?45?) e ASTM D5379-12 (ensaio de Iosipescu), apresentaram diferen?as significativas para a resist?ncia ao cisalhamento e similaridade nos valores do m?dulo de cisalhamento. O ensaio de tra??o ?45?, conforme an?lise macromec?nica, mostrou-se como o mais adequado para comp?sito com caracter?sticas similares ao analisado. Ao inserir os dados dos ensaios nas equa??es te?ricas que definem os crit?rios de falhas da M?xima Tens?o, Tsai-Hill, Tsai-Wu e Hashin e, analis?-los estatisticamente, contatou-se que estas teorias de falhas descrevem satisfatoriamente o comportamento experimental da l?mina, e, portanto, podem ser utilizados para predizer a resist?ncia mec?nica em comp?sitos como o avaliado, embora se tenha observado ?ndices de representatividade maiores quando se utiliza o ensaio de cisalhamento por tra??o ?45?. / The constant search for more efficient materials and with high mechanical performance, contributes effectively to the growing demand in the use of hybrid composites. The hybridization process can provide significant improvement in the overall combination of properties, thus enabling specific applications in structural elements that require excellence in their mechanical properties and low specific mass. Coupled with the gradual use of these materials, studies that focus on fault predictions and, consequently, analyzes of the maximum loads that these materials can withstand become essential to guarantee the reliability of their application. In this sense, the present research sought to analyze the mechanical behavior of laminae composed of two-way hybrid fabric (glass/carbon) and epoxy resin vinyl ester. As well as evaluating the representativeness of failure criteria developed for unidirectional composites when applied in hybrid composites of a bidirectional nature. The laminas studied were mechanically characterized based on the results obtained by tensile and shear tests performed on samples with carbon fibers orientated at 0?, 30?, 45?, 60? and 90?. It was observed from these tests that materials with fibers at off-axis loading angles exhibit lower strength, although they exhibit greater elongations when compared to samples with fibers aligned in the main direction of loading. Experimental data on shear properties, standardized by ASTM D3518M-13 (tensile shear test ?45?) and ASTM D5379-12 (Iosipescu's test), showed significant differences for shear strength and similarity in the modulus values of Shear. The tensile test ? 45?, according to macromechanical analysis, proved to be the most suitable for composite with characteristics similar to the one analyzed. By inserting test data into the theoretical equations defining Tsai-Hill, Tsai-Wu, and Hashin fault criteria, and statistically analyzing them, it was found that these fault theories satisfactorily describe the experimental behavior of the blade , and therefore can be used to predict mechanical strength in composites as evaluated, although higher representativity indices were observed when using the ? 45? traction shear test.

Made available in DSpace on 2014-12-17T14:52:31Z (GMT). No. of bitstreams: 1 ThiagoAES.pdf: 2135259 bytes, checksum: 7a7a4b8f1ca09cb9a42f3cb24a5cbd4a (MD5) Previous issue date: 2006-05-19 / Este trabalho tem dois objetivos: avaliar a usabilidade de tr?s interfaces de ambientes virtuais de educa??o ? dist?ncia atrav?s de duas t?cnicas avaliativas e identificar os fatores influenciadores da percep??o de usabilidade dos ambientes avaliados. Os sistemas de educa??o ? dist?ncia escolhidos foram o AulaNet, o E-Proinfo e o Teleduc, por serem desenvolvidos no Brasil e terem distribui??o gratuita. A avalia??o da usabilidade foi realizada atrav?s de duas t?cnicas documentadas na literatura. A primeira t?cnica de avalia??o, do tipo preditiva ou diagn?stica, foi realizada pelo autor e um concluinte do curso de Sistemas de Informa??o do Centro Federal de Educa??o Tecnol?gica do estado do Piau? (CEFET-PI), mediante a observa??o de um checklist denominado Ergolist. A segunda avalia??o, do tipo prospectivo, foi efetivada com o usu?rio sendo o pr?prio avaliador das interfaces, atrav?s de um question?rio. A amostra foi composta de 15 professores e 15 alunos do CEFET-PI. Os resultados colhidos foram analisados a partir da estat?stica descritiva e testes de chi-quadrado. Os resultados mostraram que os ambientes apresentarem problemas de adaptabilidade, pois n?o possuem flexibilidade e nem levam em considera??o a experi?ncia do usu?rio. Na an?lise inferencial, foi constatado que o tempo de uso da Internet n?o afetou significativamente sua avalia??o da usabilidade dos tr?s ambientes, assim como na maior parte das vari?veis de usabilidade n?o foram influenciadas pelo tipo de usu?rio , sexo e escolaridade . Por outro lado, em v?rios dos crit?rios ergon?micos avaliados, as vari?veis de sistema tipo de ambiente e experi?ncia com computador e a vari?vel demogr?fica faixa et?ria afetaram a percep??o de usabilidade dos ambientes virtuais de educa??o ? dist?ncia

Made available in DSpace on 2014-12-17T14:52:34Z (GMT). No. of bitstreams: 1 ErnestoATN.pdf: 2867586 bytes, checksum: 365968b169b7f677e1d1f4d8af8d3fab (MD5) Previous issue date: 2006-05-19 / The Brazilian organic market has growing year by year, and this commercialization is extremely important to the country, because it allows a bigger preoccupation with the environmental preservation, as well as to create employments and income to the rural workers. However, is necessary that these producers define forms of competition in the market, the way how they will compete, focusing aspects that really matters to the clients. So, the work objective is investigate, based in the rural producers perceptions, the facts which affect the competition the production of organics vegetables in the state of Rio Grande do Norte. With the aim of contribute to the made of strategic decisions related to the production and commercialization of these products in the agriculture scenery norte-rio-grandense, besides to contribute with information about the competition, helping as reference to others important researches. In the methodological view, this study can be qualified as an applied research study, with descriptive objective and quantitative approach. The instrument used was the formulary, resuming to producers of organics products in Rio Grande do Norte state, that grows the segment of organic types of vegetables and greens, been thirty two producers. The data was treated through of the descriptive analyze and the Cluster s analyze. The descriptive research results indicate that the main factors which affect the competition of the organics products in our State are the cost, the diversification and reliability. The Cluster s analyze shows that exists am group of organics producers who uses frequently a specialized technique and they give support to the bigger retail market, as supermarkets / O mercado org?nico brasileiro vem crescendo a cada ano, e essa comercializa??o ? extremamente importante para o pa?s, pois possibilita uma maior preocupa??o com a preserva??o ambiental, al?m de gerar emprego e renda para os trabalhadores rurais. Para tanto, ? necess?rio que esses produtores definam formas de competir no mercado, focalizando os aspectos que realmente importam para os clientes. Portanto, o objetivo deste trabalho ? investigar, com base na percep??o dos produtores rurais, os fatores que afetam a competitividade na produ??o de hortali?as org?nicas no Estado do Rio Grande do Norte, com a finalidade de contribuir para a tomada de decis?es estrat?gicas no que diz respeito ? produ??o e comercializa??o no cen?rio agr?cola norte-rio-grandense, al?m de disponibilizar informa??es sobre a competitividade desses produtos, a fim de servir de refer?ncia para outras pesquisas que sejam pertinentes. Do ponto de vista metodol?gico, o presente trabalho pode ser classificado como um estudo de pesquisa aplicada, com objetivo descritivo e abordagem quantitativa. O instrumento utilizado foi o formul?rio, delimitando-se a pesquisar os produtores de produtos org?nicos do Estado Rio Grande do Norte, que cultivam o segmento do tipo legumes e verduras org?nicas, totalizando trinta e dois produtores. Os dados foram tratados atrav?s da An?lise Descritiva e da An?lise de Cluster. Resultados da pesquisa descritiva indicaram que os principais fatores que afetam a competitividade dos produtos org?nicos no Estado do Rio Grande do Norte s?o os custos, a diferencia??o e a confiabilidade. A an?lise de Cluster apresentou que existe um agrupamento de produtores org?nicos que utilizam com maior freq??ncia ? ajuda de t?cnico especializado e este mesmo grupo ? o que atende ao ramo varejista de maior porte, como supermercados

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-05-30T23:20:44Z No. of bitstreams: 1 LucemaideBatistaMirandaFerreira_TESE.pdf: 4494748 bytes, checksum: f35753b1191ecb306cd0973efb042a35 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-06-01T23:33:29Z (GMT) No. of bitstreams: 1 LucemaideBatistaMirandaFerreira_TESE.pdf: 4494748 bytes, checksum: f35753b1191ecb306cd0973efb042a35 (MD5) / Made available in DSpace on 2016-06-01T23:33:29Z (GMT). No. of bitstreams: 1 LucemaideBatistaMirandaFerreira_TESE.pdf: 4494748 bytes, checksum: f35753b1191ecb306cd0973efb042a35 (MD5) Previous issue date: 2015-08-06 / O presente trabalho tem como objetivo fazer uma an?lise das propriedades mec?nicas e do comportamento mec?nico de duas l?minas refor?adas com tecido unidirecional de fibra de curau? com diferentes fra??es volum?tricas, baseado em crit?rios de falha definidos em literatura. Os comp?sitos, que apresentam matriz polim?rica e refor?o com tecido unidirecional de fibra de curau?, foram submetidos a ensaios de tra??o e cisalhamento em uma s?rie de corpos de provas normatizados cuja orienta??o das fibras direcionadas em ?ngulos de 0?, 10?, 20?, 75? e 90? para a l?mina com fra??o volum?trica de 30% e 0?, 30?, 45?, 60?, e 90? para a l?mina com fra??o volum?trica de 22%, para ensaios de tra??o e para ensaio de cisalhamento a orienta??o do ?ngulo do refor?o foi de 90?. Os ensaios foram executados em uma m?quina universal de tra??o e coletados os dados das propriedades mec?nicas dos corpos de prova dos comp?sitos. Estes dados experimentais foram inseridos nas equa??es te?ricas que definem os crit?rios de falha, como tamb?m, tratados graficamente para an?lise dos resultados e compara??o entre os ?ngulos de orienta??o do refor?o. Constatou-se uma grande dispers?o entre os dados experimentais do m?dulo de Elasticidade e do Coeficiente de Poisson em rela??o ao comportamento te?rico principalmente para a l?mina com menor fra??o volum?trica. O comp?sito com orienta??o de refor?o a 0? apresentou a maior resist?ncia ? tra??o em rela??o ?s demais inclina??es para as duas l?minas. No entanto, em rela??o aos crit?rios de falha as l?minas tiveram comportamentos diferentes. Para a l?mina com fra??o volum?trica 30%, os quatro crit?rios estudados nesta Tese apresentaram boa concord?ncia em termos de resist?ncia, mas para a l?mina com fra??o volum?trica de 22%, apenas o crit?rio de Tsai-Will e Hashin apresentaram boa concord?ncia. . / This study aims to analyze the mechanical properties and the mechanical behavior of two laminas reinforced with unidirectional fabric curau? with different fiber volume fractions, based on failure criteria defined in the literature. The composites which have polymeric matrix and reinforcement with unidirectional fabric curaua fiber, were submitted to tensile and shear tests at a series of specimens standardized whose fiber orientation directed at angles of 0?, 10?, 20?, 75? and 90? to the lamina with volume fraction of 30% and 0?, 30 ?, 45 ?, 60 ?, and 90 ? to the lamina with volume fraction of 22% to tensile tests and shear tests the direction of strengthening the angle was 90 ? to the x axis (direction of the applied load). The tests were performed in a universal machine traction and collected the data of mechanical properties of the composite specimens. These experimental data were entered in the theoretical equations that define the failure criteria, as well as graphically treated to analyze the results and compare the enhanced orientation angles. It found major disparities between the experimental data of elastic modulus and Poisson's ratio in relation to the theoretical behavior primarily to the lamina with a lower volume fraction. The composite reinforcement orientation at 0 ? showed the highest tensile strength compared to other inclinations for the two laminas. However, regarding the failure criteria laminas have different behaviors. To the lamina with volume fraction 30%, the four criteria studied in this thesis showed equivalent results in terms of resistance and to the blade with volume fraction of 22%, only the maximum stress criterion was not satisfactory in representing experiemtais data.

Made available in DSpace on 2014-12-17T14:55:05Z (GMT). No. of bitstreams: 1 JacquelineAAB.pdf: 1416880 bytes, checksum: e190cf601773f52aa30f732160fe9e7a (MD5) Previous issue date: 2007-12-20 / The predictive control technique has gotten, on the last years, greater number of adepts in reason of the easiness of adjustment of its parameters, of the exceeding of its concepts for multi-input/multi-output (MIMO) systems, of nonlinear models of processes could be linearised around a operating point, so can clearly be used in the controller, and mainly, as being the only methodology that can take into consideration, during the project of the controller, the limitations of the control signals and output of the process. The time varying weighting generalized predictive control (TGPC), studied in this work, is one more an alternative to the several existing predictive controls, characterizing itself as an modification of the generalized predictive control (GPC), where it is used a reference model, calculated in accordance with parameters of project previously established by the designer, and the application of a new function criterion, that when minimized offers the best parameters to the controller. It is used technique of the genetic algorithms to minimize of the function criterion proposed and searches to demonstrate the robustness of the TGPC through the application of performance, stability and robustness criterions. To compare achieves results of the TGPC controller, the GCP and proportional, integral and derivative (PID) controllers are used, where whole the techniques applied to stable, unstable and of non-minimum phase plants. The simulated examples become fulfilled with the use of MATLAB tool. It is verified that, the alterations implemented in TGPC, allow the evidence of the efficiency of this algorithm / A t?cnica de controle preditivo tem obtido, nos ?ltimos anos, maior n?mero de adeptos em raz?o da facilidade de ajuste dos seus par?metros, da extrapola??o de seus conceitos para sistemas de entradas m?ltiplas e sa?das m?ltiplas, de modelos n?o lineares de processos serem linearizados em um ponto de opera??o, sendo assim, usados explicitamente no controlador, e principalmente, por ser a ?nica metodologia que pode levar em considera??o, durante o projeto do controlador, as limita??es dos sinais de controle e sa?da do processo. O controle preditivo generalizado com fun??o de pesos variante no tempo (TGPC), estudado neste trabalho, ? mais uma alternativa aos diversos controles preditivos existentes, caracterizando-se como uma modifica??o do controle preditivo generalizado (GPC), em que h? a utiliza??o de um modelo de refer?ncia, calculado de acordo com par?metros de projeto previamente estabelecidos pelo projetista, e o emprego de uma nova fun??o crit?rio, que ao ser minimizada fornece os melhores par?metros para o controlador. Utiliza-se a t?cnica dos algoritmos gen?ticos para minimiza??o da fun??o crit?rio proposta e busca-se demonstrar a robustez do TGPC atrav?s da aplica??o de crit?rios de desempenho, estabilidade e robustez. Para comparar os resultados do controlador TGPC, s?o utilizados os controladores GPC e proporcional, integral e derivativo (PID), e todas as t?cnicas s?o aplicadas a plantas est?vel, inst?vel e de fase n?o m?nima. Os exemplos ilustrativos simulados realizam-se com o uso da ferramenta MATLAB. Verifica-se que, as altera??es implementadas no TGPC, permitem a comprova??o da efici?ncia deste algoritmo

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-06-02T19:20:54Z No. of bitstreams: 1 AlinnePriscillaDantasSilva_DISSERT.pdf: 825075 bytes, checksum: 05a1d90e8910740a59d800b9effd717c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-06-05T22:48:07Z (GMT) No. of bitstreams: 1 AlinnePriscillaDantasSilva_DISSERT.pdf: 825075 bytes, checksum: 05a1d90e8910740a59d800b9effd717c (MD5) / Made available in DSpace on 2017-06-05T22:48:07Z (GMT). No. of bitstreams: 1 AlinnePriscillaDantasSilva_DISSERT.pdf: 825075 bytes, checksum: 05a1d90e8910740a59d800b9effd717c (MD5) Previous issue date: 2014-09-19 / Atualmente, as organiza??es que operam com recursos p?blicos possuem o desafio de comunicar resultados que v?o al?m do alcance de metas, custos e prazos. Observa-se a import?ncia de um sistema de avalia??o de projetos com indicadores que reflitam seu sucesso ou fracasso. O estudo compreende uma an?lise te?rica e emp?rica sobre os indicadores de desempenho de projetos e crit?rios de sucesso, direcionando a pesquisa ao Servi?o de Apoio ?s Micro e Pequenas Empresas do Rio Grande do Norte ? SEBRAE/RN, e tem objetivo de analisar indicadores de desempenho de projetos a partir da avalia??o dos crit?rios de sucesso. Como arcabou?o te?rico utilizou as dimens?es m?ltiplas de sucesso de projetos propostas por Shenhar; Dvir (2007), e quanto ? an?lise dos indicadores de desempenho, baseou-se na metodologia proposta por Barclay; Osei-Bryson (2010). Para o alcance dos objetivos deste trabalho, foi realizada uma pesquisa de natureza explorat?ria e descritiva, atrav?s de estudo de caso, com abordagem mista, utilizando m?todos quantitativos e qualitativos. A pesquisa abordou 6 (seis) projetos da organiza??o e aplicou coleta de informa??es do tipo survey junto ao p?blico-alvo dos projetos, seus respectivos gestores e parceiros, equipe de gest?o e diretoria executiva da organiza??o. A pesquisa qualitativa foi abordada para an?lise de seus resultados, avalia??o dos crit?rios de sucesso existentes na organiza??o, seu sistema de avalia??o de projetos e de indicadores de projeto. Dianta da an?lise da pesquisa, por meio do teste de Kruskail Wails, averiguou-se que existe homogeneidade na variabilidade das vari?veis estudadas. Afirma-se que a organiza??o possui um processo formal para medir e avaliar seus projetos, de acordo com indicadores de resultado de custo, prazo, imagem organizacional, satisfa??o, aplicabilidade, faturamento, produtividade, competitividade e mercado, existindo assim, uma lacuna entre a teoria de crit?rios de sucesso de Shenhar; Dvir (2007) e a pr?tica existente na organiza??o. Ap?s estudo de referencial bibliogr?fico e an?lise dos dados, observa-se que os indicadores de desempenho da organiza??o est?o alinhados a defini??o de Barclay; Osei-Bryson (2010). Sugere-se ao SEBRAE/RN, que em sua avalia??o de projetos, sejam analisados os crit?rios de sucesso contempladas na teoria de Shenhar; Dvir (2007) e que estes se transformem em uma ferramenta para medi??o de sucesso ou fracasso de projetos. / Today, organizations that operate with public funds have the challenge of communicating results that go beyond achieving goals, costs and deadlines. Notes the importance for organizations to have a system for evaluating projects with indicators that reflect their success or failure and thus may contribute to the operational strategy of the organization. The study comprises a theoretical and empirical analysis about the projects performance indicators and success criteria, directing the search to the Servi?o de Apoio ?s Micro e Pequenas Empresas do Rio Grande do Norte - SEBRAE / RN, in order to analyse its projects performance indicators based on the evaluation of the success criteria. As theoretical framework, it was used the multiple dimensions of successful projects proposed by Shenhar and Dvir (2007), and as the analysis of performance indicators was based on the methodology proposed by Barclay; Osei-Bryson (2010). To achieve the objectives of this study, a survey of exploratory and descriptive nature was carried out through a case study, with mixed approach, using quantitative and qualitative methods. The study approached six (6) projects of the organization and applied information collection typed ?survey? with the target audience of the projects, their managers and partners, team management and project monitoring and executive board of the organization. The qualitative research was addressed to the results analyzes, evaluation of existing criteria for success in the organization, its system of project evaluation and project indicators. After analyzing the research, it is noted the high concordance of answered as the five (5) dimensions of success criteria proposed by Shenhar and Dvir (2007). It is stated that the organization has a formal process for measuring and evaluating their projects, according to outcome indicators of cost, time, organizational image, satisfaction, applicability, sales, productivity, market competitiveness and thus there is a gap between theory of success criteria Shenhar and Dvir (2007) and the existing practice in the organization. After study of bibliographic references and data analysis, it is observed that the performance indicators of the organization are aligned the definition of Barclay and Osei- Bryson (2010). It is suggested to SEBRAE / RN, which in its evaluation of projects, the success criteria for projects contemplated in Shenhar and Dvir theory (2007) are analyzed and they are transformed into a tool for measuring the success or failure of projects.