Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-01-12T18:35:51Z No. of bitstreams: 2 license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) marcelo_gaspary_martins.pdf: 937192 bytes, checksum: 616d06da3121598310ea00d8e63279cd (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2016-01-12T18:36:19Z (GMT) No. of bitstreams: 2 license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) marcelo_gaspary_martins.pdf: 937192 bytes, checksum: 616d06da3121598310ea00d8e63279cd (MD5) / Made available in DSpace on 2016-01-12T18:36:19Z (GMT). No. of bitstreams: 2 license_rdf: 22974 bytes, checksum: 99c771d9f0b9c46790009b9874d49253 (MD5) marcelo_gaspary_martins.pdf: 937192 bytes, checksum: 616d06da3121598310ea00d8e63279cd (MD5) Previous issue date: 2014 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Na atual nutri??o de precis?o, a maximiza??o do aproveitamento dos nutrientes ? otimizada pelo uso de aditivos, que s?o importantes tamb?m para redu??o da excre??o de compostos potencialmente poluentes ao meio ambiente, como o nitrog?nio e o f?sforo. Com isso, objetivou-se,com o desenvolvimento de dois experimentos:avaliar o desempenho de juvenis til?pia do Nilo submetidos a ra??es extrusadas contendo o complexo enzim?tico SSF (solid station fermentation)adicionado em diferentes etapas do processamento (antes e ap?s a extrus?o), e o desenvolvimento de juvenis tambacu com ra??es contendo diferentes n?veis do mesmo complexo enzim?tico. No experimento 1 com til?pia, foram utilizados 140 animais distribu?dos em 5 tratamentos: sem enzimas (Controle), 400ppm de complexo enzim?tico SSF na mistura antes da extrus?o (AE400), 800ppm de complexo enzim?tico SSF na mistura antes da extrus?o (AE800), 400ppm de complexo enzim?tico SSF adicionados ?on top? ap?s a extrus?o (DE400), 800ppm decomplexo enzim?tico SSF adicionados ?on top? ap?s a extrus?o (DE800) com 4 repeti??es, totalizando 20 unidades experimentais. J? no experimento 2 com o tambacu foram utilizados 240 animais distribu?dos em 6 tratamentos:sem enzimas (Controle); Inclus?o de 200ppm (DE200); Inclus?o de 400ppm (DE400); Inclus?o de 600ppm (DE600); Inclus?o de 800ppm(DE800); Inclus?o de 1000ppm (DE1000), com 4 repeti??es, totalizando 24 unidades experimentais. Em ambos experimentos as ra??es experimentais continham a mesma formula??o, diferenciando apenas nos n?veis de inclus?o do complexo enzim?tico SSF. Os peixes foram alimentados 4 vezes ao dia (8, 11, 14 e 17 h), at? a saciedade evitando sobras de alimento. Os ensaios foram conduzidos durante 56 dias em um sistema de recircula??o com controle de temperatura, aera??o e luz. No experimento 1 notou-se que as ra??es contendo o complexo enzim?tico SSF influenciaram positivamente o ganho de peso, sendo a inclus?o do complexo enzim?tico ap?s o processo extrus?o favor?vel ao desempenho, recomendando-se para til?pias a inclus?o de 800 ppm ?on top?. J? no experimento 2, observou-se que a inclus?o de 600 ppm de complexo enzim?tico SSF ?on top?, em ra??es para tambacus, promove melhores ?ndices de convers?o alimentar, n?o sendo observado melhorias neste mesmo par?metro com o aumento da inclus?o deste complexo, sendo recomendado a inclus?o de 600 ppm ?on top? em ra??es para tambacus. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2014. / ABSTRACT In the current nutrition precision, maximizing the utilization of nutrients is optimized by the use of additives, which are also important for reducing the excretion of compounds potentially pollute the environment, such as nitrogen and phosphorus. Thus, we aimed at, with the development of two experiments to assess the performance of juvenile Nile tilapia subjected to extruded feed containing the enzyme complex SSF (solid fermentation station) added at different stages of processing (before and after extrusion) and the development of tambacu juveniles with diets containing different levels of the same enzyme complex. In experiment 1 with tilapia, 140 animals distributed in five treatments (control (no enzyme), 400 ppm SSF enzyme complex in the mixture prior to extrusion (AE400), 800 ppm SSF enzyme complex in the mixture prior to extrusion (AE800 were used) 400 ppm enzyme "on top" complex SSF added after extrusion (DE400), 800 ppm SSF enzyme complex added "on top" after extrusion (DE800)) with four replications, totaling 20 experimental units. Inclusion of 200 ppm (DE200); Inclusion of 400 ppm (DE400); Inclusion of 600 ppm (DE600), whereas in experiment 2 with tambacu 240 animals distributed into six treatments (Control (without enzymes) were used Inclusion 800 ppm (DE800); Inclusion 1000 ppm (DE1000)) with four replications, totaling 24 experimental units. In both experiments the experimental diets contained the same wording, differing only in the inclusion levels of the enzyme complex SSF. The fish were fed four times a day (8, 11, 14 and 17 hr) to satiation avoiding feed leftovers. The tests were conducted for 56 days in a recirculation system with temperature control, aeration and light. In experiment 1 it was noted that the diets containing the enzyme complex SSF positively influenced weight gain, and the inclusion of the enzyme complex after the extrusion process conducive to performance, recommending the inclusion of tilapia to 800 ppm "on top". In the second experiment, it was observed that the inclusion of 600 ppm SSF enzyme complex "on top" in rations for tambacus promotes better feed conversion ratios. No improvement was observed in the same parameter with increasing inclusion of this complex, being recommended the inclusion of 600 ppm "on top" in rations for tambacus.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-02-05T22:23:13Z No. of bitstreams: 1 FelipeRodriguesDeFreitasNeto_DISSERT.pdf: 3950431 bytes, checksum: e745e9e8d88a352ca3889ccb553a2f82 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-02-15T23:47:00Z (GMT) No. of bitstreams: 1 FelipeRodriguesDeFreitasNeto_DISSERT.pdf: 3950431 bytes, checksum: e745e9e8d88a352ca3889ccb553a2f82 (MD5) / Made available in DSpace on 2016-02-15T23:47:00Z (GMT). No. of bitstreams: 1 FelipeRodriguesDeFreitasNeto_DISSERT.pdf: 3950431 bytes, checksum: e745e9e8d88a352ca3889ccb553a2f82 (MD5) Previous issue date: 2015-02-20 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico - CNPq / A crescente necessidade por alimentos ? algo que preocupa o mundo, que possui uma popula??o que cresce a uma progress?o geom?trica enquanto seus recursos cresce a uma progress?o aritm?tica. Para amenizar este problema h? algumas propostas, entre elas aumentar a produ??o de alimentos ou reduzir seu desperd?cio. Diversos estudos s?o realizados no mundo com o objetivo de reduzir o desperd?cio de alimentos que pode chegar a 40% da produ??o, dependendo da regi?o. Para isto, t?cnicas s?o utilizadas para retardar a degrada??o dos alimentos, entre elas a secagem. O presente trabalho apresenta um projeto de um secador de frutas hibrido que utiliza energia solar e energia el?trica com uma automatiza??o do processo. Para realizar os testes de secagem foram escolhidos frutas t?picas, com boa aceitabilidade como frutas processadas. Durante os experimentos foram medidos valores de temperatura em pontos distintos. Tamb?m foram medidos valores de umidade, radia??o solar e massa. Foi constru?do um sistema de aquisi??o de dados utilizando um Ardu?no para a obten??o das temperaturas. Os dados eram enviados para um programa nomeado Secador de Frutas, feito no presente trabalho, para plotar os mesmo. O volume da c?mara de secagem foi de 423 litros e apesar do tamanho incomum os teste utilizando espelhos para aumentar a incid?ncia de radia??o direta, mostraram que o secador ? competitivo quando comparado a outros secadores solares produzidos no Laborat?rio de Maquinas Hidr?ulicas e Energia Solar (LMHES) da UFRN. O secador foi constru?do com um custo de 3 a 5 vezes menor do que secadores industriais que operam com a mesma carga de frutas. E o custo energ?tico para produzir frutas secas mostrou-se mais vi?vel comparado a tais secadores,que utilizam GLP como fonte de energia. No entanto o tempo de secagem foi maior. / The growing need for food is something that worries the world, which has a population that is growing at a geometric progression while their resources grows at an arithmetic progression. To alleviate this problem there are some proposals, including increased food production or reduce waste thereof. Many studies have been conducted in the world in order to reduce food waste that can reach 40% of production, depending on the region. For this purpose techniques are used to retard degradation of foods, including drying. This paper presents a design of a hybrid fruit dryer that uses solar energy and electric energy with automation of the process. To accomplish drying tests were chosen Typical fruits with good acceptability as processed fruits. During the experiments were measured temperature values at different points. Were also measured humidity values, solar radiation and mass. A data acquisition system was built using a Arduino for obtaining temperatures. The data were sent to a program named Secador de Frutas, done in this work, to plot the same. The volume of the drying chamber was 423 liters and despite the unusual size test using mirrors to increase the incidence of direct radiation, showed that the drier is competitive when compared with other solar dryers produced in Hydraulic Machines and Solar Energy Laboratory (LMHES ) UFRN. The drier has been built at a cost of 3 to 5 times smaller than industrial dryers that operate with the same load of fruit. And the energy cost to produce dried fruits was more feasible compared with such dryers that use LPG as an energy source. However, the drying time was longer.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-03-31T22:29:13Z No. of bitstreams: 1 ArthurEmanoelCassioDaSilvaESouza_DISSERT.pdf: 1480067 bytes, checksum: 15c2cf114fae56a6c186a5417cecb57f (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-04-04T19:16:06Z (GMT) No. of bitstreams: 1 ArthurEmanoelCassioDaSilvaESouza_DISSERT.pdf: 1480067 bytes, checksum: 15c2cf114fae56a6c186a5417cecb57f (MD5) / Made available in DSpace on 2016-04-04T19:16:06Z (GMT). No. of bitstreams: 1 ArthurEmanoelCassioDaSilvaESouza_DISSERT.pdf: 1480067 bytes, checksum: 15c2cf114fae56a6c186a5417cecb57f (MD5) Previous issue date: 2015-01-28 / A computa??o em nuvem pode ser definida como um modelo computacional distribu?do atrav?s do qual s?o compartilhados recursos (hardware, armazenamento, plataformas de desenvolvimento e comunica??o) na forma de servi?os pagos e acess?veis com um esfor?o m?nimo de gest?o e intera??o. Um grande benef?cio desse modelo ? possibilitar a utiliza??o de variados provedores (i.e. uma arquitetura multiplataforma) para compor um conjunto de servi?os no intuito de obter uma configura??o ?tima em desempenho e custo. Entretanto, a utiliza??o multiplataforma ? impossibilitada pelo problema de cloud lock-in. O cloud lock-in ? a depend?ncia entre uma aplica??o e uma plataforma de nuvem. Ele ? comumente endere?ado por tr?s estrat?gias: (i) uso de camada intermedi?ria que se interp?e aos consumidores de servi?os de nuvem e o provedor, (ii) uso de interfaces padronizadas para acesso a nuvem, ou ainda (iii) uso de modelos com especifica??es abertas. Este trabalho define uma abordagem para avaliar estas estrat?gias. Tal abordagem foi executada e observou-se que apesar dos avan?os conseguidos por estas estrat?gias, nenhuma delas resolve efetivamente o problema do cloud lock-in. Neste sentido, esse trabalho prop?e o uso de Web Sem?ntica para evitar o cloud lock-in, onde modelos em RDF s?o usados para especificar os recursos de uma nuvem, que s?o gerenciados via consultas SPARQL. Nessa dire??o, esse trabalho: (i) apresenta um modelo avaliativo que quantifica o problema do cloud lock-in, (ii) avalia o cloud lock-in entre tr?s solu??es multi-cloud e tr?s plataformas de nuvem, (iii) prop?e utilizar RDF e SPARQL na ger?ncia de recursos de nuvem, (iv) apresenta o Cloud Query Manager (CQM), um servidor SPARQL que implementa a proposta, e (v) compara tr?s solu??es multi-cloud em rela??o ao CQM quanto ao tempo de resposta e a efetividade na resolu??o do cloud lock-in. / Cloud computing can be defined as a distributed computational model by through resources (hardware, storage, development platforms and communication) are shared, as paid services accessible with minimal management effort and interaction. A great benefit of this model is to enable the use of various providers (e.g a multi-cloud architecture) to compose a set of services in order to obtain an optimal configuration for performance and cost. However, the multi-cloud use is precluded by the problem of cloud lock-in. The cloud lock-in is the dependency between an application and a cloud platform. It is commonly addressed by three strategies: (i) use of intermediate layer that stands to consumers of cloud services and the provider, (ii) use of standardized interfaces to access the cloud, or (iii) use of models with open specifications. This paper outlines an approach to evaluate these strategies. This approach was performed and it was found that despite the advances made by these strategies, none of them actually solves the problem of lock-in cloud. In this sense, this work proposes the use of Semantic Web to avoid cloud lock-in, where RDF models are used to specify the features of a cloud, which are managed by SPARQL queries. In this direction, this work: (i) presents an evaluation model that quantifies the problem of cloud lock-in, (ii) evaluates the cloud lock-in from three multi-cloud solutions and three cloud platforms, (iii) proposes using RDF and SPARQL on management of cloud resources, (iv) presents the cloud Query Manager (CQM), an SPARQL server that implements the proposal, and (v) comparing three multi-cloud solutions in relation to CQM on the response time and the effectiveness in the resolution of cloud lock-in.

Made available in DSpace on 2014-12-17T14:57:37Z (GMT). No. of bitstreams: 1 BrismarkGR_capa_ate_secao3.pdf: 558121 bytes, checksum: b18dbb5797c3daa771ffa68209743702 (MD5) Previous issue date: 2007-07-30 / This work purposes the application of a methodology to optimize the implantation cost of an wind-solar hybrid system for oil pumping. The developed model is estimated the implantation cost of system through Multiple Linear Regression technique, on the basis of the previous knowledge of variables: necessary capacity of storage, total daily energy demand, wind power, module power and module number. These variables are gotten by means of sizing. The considered model not only can be applied to the oil pumping, but also for any other purposes of electric energy generation for conversion of solar, wind or solar-wind energy, that demand short powers. Parametric statistical T-student tests had been used to detect the significant difference in the average of total cost to being considered the diameter of the wind, F by Snedecor in the variance analysis to test if the coefficients of the considered model are significantly different of zero and test not-parametric statistical by Friedman, toverify if there is difference in the system cost, by being considered the photovoltaic module powers. In decision of hypothesis tests was considered a 5%-significant level. The configurations module powers showed significant differences in total cost of investment by considering an electrical motor of 3 HP. The configurations module powers showed significant differences in total cost of investment by considering an electrical motor of 5 HP only to wind speed of 4m/s and 6 m/s in wind of 3 m, 4m and 5 m of diameter. There was not significant difference in costs to diameters of winds of 3 m and 4m. The mathematical model and the computational program may be used to others applications which require electrical between 2.250 W and 3.750 W. A computational program was developed to assist the study of several configurations that optimizes the implantation cost of an wind-solar system through considered mathematical model / Este trabalho prop?e a aplica??o de uma metodologia para otimizar o custo da implanta??o de um sistema h?brido e?lico-solar para bombeamento de petr?leo. O modelo desenvolvido estima o custo da implanta??o do sistema por meio da utiliza??o da t?cnica de Regress?o Linear M?ltipla, com base no conhecimento pr?vio das vari?veis: capacidade necess?ria de armazenamento, demanda di?ria total de energia, pot?ncia do aerogerador, pot?ncia de m?dulos e n?mero de m?dulos, sendo estas vari?veis obtidas por meio de dimensionamento. O modelo proposto pode ser aplicado n?o somente ao bombeamento de petr?leo, mas tamb?m para quaisquer outras finalidades de gera??o de energia el?trica por convers?o da energia e?lica, solar ou e?lica-solar que demandem baixas pot?ncias. Foram utilizados testes estat?sticos param?tricos tais como o T-student, para detectar a diferen?a significativa na m?dia do custo total ao ser considerado o di?metro do aerogerador; o F de Snedecor, na an?lise de vari?ncia para testar se os coeficientes do modelo proposto s?o significativamente diferentes de zero e o teste estat?stico n?o-param?trico de Friedman, para verificar se existe diferen?a no custo do sistema, ao ser considerado as pot?ncias dos m?dulos fotovoltaicos. Na decis?o dos testes de hip?teses considerou-se um n?vel de signific?ncia de 5%. As configura??es de pot?ncias dos m?dulos apresentaram diferen?as significativas no custo total do investimento ao ser considerado um motor el?trico de 3 HP. As configura??es de pot?ncias dos m?dulos apresentaram diferen?as significativas com motor el?trico de 5 HP somente para velocidades de vento de 4 m/s e 6 m/s em aerogeradores de 3 m, 4 m e 5 m de di?metros. N?o existiu diferen?a significativa nos custos para di?metros de aerogeradores de 3 m e 4 m. O modelo matem?tico e o programa computacional podem ser utilizados para outras aplica??es que requeiram pot?ncia el?trica entre 2.250 W e 3.750 W. Desenvolveu-se um programa computacional para auxiliar o estudo de v?rias configura??es, o qual otimiza o custo de implanta??o de um sistema e?lico-solar com base no modelo matem?tico proposto

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2018-04-02T12:49:22Z No. of bitstreams: 1 AlyssonNascimentoDeLucena_DISSERT.pdf: 4569473 bytes, checksum: 34d0b14b7d7d70819c4d05eb81951a77 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2018-04-04T14:25:01Z (GMT) No. of bitstreams: 1 AlyssonNascimentoDeLucena_DISSERT.pdf: 4569473 bytes, checksum: 34d0b14b7d7d70819c4d05eb81951a77 (MD5) / Made available in DSpace on 2018-04-04T14:25:01Z (GMT). No. of bitstreams: 1 AlyssonNascimentoDeLucena_DISSERT.pdf: 4569473 bytes, checksum: 34d0b14b7d7d70819c4d05eb81951a77 (MD5) Previous issue date: 2018-01-31 / Este trabalho busca apresentar o desenvolvimento de um Ve?culo A?reo n?o Tripulado (VANT) duplamente h?brido, capaz de conciliar as vantagens de dois tipos de aeronaves (asa fixa e multirotor), utilizando motores a combust?o e el?tricos para a propuls?o e para a sustenta??o em voo a asa e o multirotor, capaz de decolar e pousar verticalmente, executar voos lentos ou parados, tamb?m executar voo horizontal com sustenta??o pela asa e propuls?o por motor a combust?o que garante maior autonomia. Para a realiza??o desse estudo foram desenvolvidas tr?s aeronaves, inicialmente uma asa voadora e um multirotor tric?ptero com objetivo de analisar separadamente cada tipo de aeronave, ap?s os testes e an?lises foi desenvolvido um VANT duplamente h?brido, uma asa voadora e um hexac?ptero, propuls?o por motores el?tricos e ? combust?o. A partir dos testes e c?lculos te?ricos da aeronave h?brida observou-se a viabilidade de um novo tipo de aeronave, com caracter?sticas pr?prias, capaz de conciliar as vantagens de dois tipos de aeronaves. / This work aims to present the development of a double hybrid unmanned aerial vehicle (UAV), capable of reconciling the advantages of two types of aircraft (fixed wing and multirotor), using combustion and electric motors for propulsion and in flight support the wing and the multirotor, able to take off and land vertically, to perform slow or stopped flights, also to execute horizontal flight with support by the wing and propulsion by combustion engine that guarantees greater autonomy. In order to carry out this study, three aircraft were developed, initially a flying wing and a tricopter multirotor with the objective of analyzing separately each type of aircraft, after the tests and analyzes a double hybrid VANT was developed, a flying wing and a hexacopter, motor propulsion electrical and combustion. From the theoretical tests and calculations of the hybrid aircraft, the viability of a new type of aircraft, with its own characteristics, was able to reconcile the advantages of two types of aircraft.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-03T21:25:00Z No. of bitstreams: 1 AlyssonAmancioDeSouza_DISSERT.pdf: 4550236 bytes, checksum: 1c10fb7c1799934f0a71cd8c38e2c76c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-09T14:19:20Z (GMT) No. of bitstreams: 1 AlyssonAmancioDeSouza_DISSERT.pdf: 4550236 bytes, checksum: 1c10fb7c1799934f0a71cd8c38e2c76c (MD5) / Made available in DSpace on 2017-01-09T14:19:20Z (GMT). No. of bitstreams: 1 AlyssonAmancioDeSouza_DISSERT.pdf: 4550236 bytes, checksum: 1c10fb7c1799934f0a71cd8c38e2c76c (MD5) Previous issue date: 2015-09-24 / A presente pesquisa tem como objetivo principal refletir sobre os processos n?o formais desenvolvidos em dan?a na contemporaneidade. Os cursos livres, escolas, academias, ONGs e associa??es ainda s?o as institui??es que mais formam bailarinos no Brasil (STRAZZACAPPA, 2012), nesse sentido julgamos necess?rio cont?nuas pesquisas que possam discutir e contribuir para a potencializa??o destes espa?os. Por conseguinte, este trabalho ? fundamentado metodologicamente na abordagem fenomenol?gica e mais especificamente na an?lise do fen?meno situado, tendo como campo constitutivo de estudo uma institui??o de ensino n?o formal do interior do Cear?, a Associa??o Dan?a Cariri (ADC), existente desde 2007, a qual vem fomentando diversas atividades culturais na regi?o do Cariri, sul deste estado. A partir desse contexto, a presente pesquisa aborda uma reflex?o sobre como a forma??o de ensino h?brida, proposta pela ADC, vem influenciando os artistas locais e modificando os corpos sujeitos e o ambiente da dan?a do Cariri, atrav?s de composi??es coreogr?ficas, aumento de eventos de dan?a, implementa??o de novos espa?os e pesquisas em dan?a, traduzindo-se, portanto, em um campo constitutivo voltado ? forma??o, a difus?o e ao desenvolvimento da dan?a na contemporaneidade. / This research aims to contribute to a reflection on the non-formal processes developed in dance nowadays. Free courses, schools, academies, ONGs and associations are still the institutions that make up more dancers in Brazil (STRAZZACAPPA, 2012), in this sense we consider necessary ongoing research that can discuss and contribute to the enhancement of these spaces. Therefore, this work is based methodologically on the phenomenological approach and more specifically in the analysis of situated phenomenon, with the constitutive field study a non-formal educational institution in the interior of Cear?, the Association Dance Cariri (ADC), existing since 2007, which has fueled various cultural activities in Cariri, south of this state. From this context, this research addresses a reflection on how the formation of hybrid teaching, proposed by the ADC, is contaminating local artists and modifying the subjects bodies and the Cariri dance environment through choreographic compositions, event increased dance, implementation of new spaces and research in dance, resulting therefore in a constitutive field relates to education, dissemination and development of dance in contemporary times.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-03-20T20:04:27Z No. of bitstreams: 1 RamonRudaBritoMedeiros_DISSERT.pdf: 9691744 bytes, checksum: b0c63141b5ed151f490bfed5d79bccbc (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-22T21:18:49Z (GMT) No. of bitstreams: 1 RamonRudaBritoMedeiros_DISSERT.pdf: 9691744 bytes, checksum: b0c63141b5ed151f490bfed5d79bccbc (MD5) / Made available in DSpace on 2017-03-22T21:18:49Z (GMT). No. of bitstreams: 1 RamonRudaBritoMedeiros_DISSERT.pdf: 9691744 bytes, checksum: b0c63141b5ed151f490bfed5d79bccbc (MD5) Previous issue date: 2017-01-25 / O presente trabalho apresenta um estudo de desempenho de um sistema h?brido fotovoltaico/t?rmico (sistema PVT), comparando-o com um sistema fotovoltaico (sistema PV). Foi analisada a pot?ncia el?trica e t?rmica, a efici?ncia e a energia produzida pelos sistemas, correlacionando ? influ?ncia da temperatura do m?dulo PV e a efici?ncia el?trica dos sistemas. O m?dulo fotovoltaico (PV) utilizado foi o MSX 77 da marca SOLAREX, composto por c?lulas solares policristalinas, cuja pot?ncia de pico ? de 77 Watts. O sistema PVT analisado foi do tipo PVT-l?quido, composto pelo m?dulo PV MSX77 e um coletor solar plano do tipo placa fabricado em acr?lico, a alimenta??o de ?gua do coletor foi do tipo for?ada por gravidade e com sistema aberto. Para determinar as curvas caracter?sticas do m?dulo PV e por consequ?ncia a pot?ncia el?trica m?xima gerada, foi desenvolvido um banco de carga formado por resistores de pot?ncia. A pot?ncia t?rmica foi quantificada aferindo a vaz?o da ?gua que alimentava o coletor e a diferen?a de temperatura da ?gua de entrada e sa?da. Com as pot?ncias e a radia??o incidente sobre os sistemas, foram determinadas as efici?ncias. A m?xima efici?ncia el?trica informada pelo fabricante do m?dulo PV ? de 10,8 %, contudo, em condi??es reais de opera??o, a m?xima efici?ncia do m?dulo PV foi de 8,46 %. No sistema PVT, o m?dulo PV apresentou uma efici?ncia m?xima de aproximadamente 7,8 % no ponto de m?xima pot?ncia gerada. A efici?ncia m?dia do sistema t?rmico foi na ordem de 42,5 %. O sistema PVT proporcionou a redu??o da temperatura do m?dulo PV, aumentando a efici?ncia de gera??o el?trica, proporcionando um aumento na ordem dos 6,9 % na energia el?trica m?dia di?ria. O sistema PVT al?m de proporcionar um aumento de energia el?trica, ainda fornece energia t?rmica com uma efici?ncia superior ? el?trica. A ?gua aquecida pode ser utilizada para alimentar sistemas de aquecimento de ?gua para banho, contribuindo para redu??o do consumo de energia el?trica de uma resid?ncia. / The present dissertation presents a performance study of a hybrid photovoltaic / thermal system (PVT system), comparing it with a photovoltaic system (photovoltaic system). The electrical and thermal power, efficiency and energy produced by the systems were analyzed, correlating the influence of the temperature of the photovoltaic module and the electrical efficiency of the systems. The photovoltaic (PV) module used was the MSX 77 of the brand SOLAREX, composed of polycrystalline solar cells, whose peak power is 77 Watts. The PVT system analyzed was of the PVT-liquid type, composed of the MSX77 photovoltaic module and a flat plate type solar collector made of acrylic, the water supply of the manifold was forced by gravity and with open system. To determine the characteristic curves of the PV module and consequently the maximum electric power generated, a load bank formed by power resistors was developed. The thermal power was quantified by measuring the flow of the water that fed the collector and the difference in temperature of the incoming and outgoing water. With the powers and the radiation incident on the systems, the efficiencies were determined. The maximum electrical efficiency reported by the manufacturer of the PV module is 10.8 %, however, under actual operating conditions, the maximum efficiency of the PV module was 8.46 %. In the PVT system, the PV module showed a maximum efficiency of approximately 7.8 % at the point of maximum power generated. The average efficiency of the thermal system was around 42.5 %. The PVT system provided a reduction in the temperature of the PV module, increasing the efficiency of electric generation, providing an increase in the order of 6.9 % in the average daily electric energy. The PVT system, besides providing an increase in electrical energy, still provides thermal energy with a higher efficiency than electric. The heated water can be used to power water heating systems for bathing, contributing to reduce the consumption of electric energy of a residence.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-04-03T19:47:14Z No. of bitstreams: 1 AndreQuintilianoBezerraSilva_DISSERT.pdf: 6705778 bytes, checksum: 90ff28923ed0270632f9a0851890a75a (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-04-05T21:51:32Z (GMT) No. of bitstreams: 1 AndreQuintilianoBezerraSilva_DISSERT.pdf: 6705778 bytes, checksum: 90ff28923ed0270632f9a0851890a75a (MD5) / Made available in DSpace on 2017-04-05T21:51:32Z (GMT). No. of bitstreams: 1 AndreQuintilianoBezerraSilva_DISSERT.pdf: 6705778 bytes, checksum: 90ff28923ed0270632f9a0851890a75a (MD5) Previous issue date: 2017-02-14 / Um dos principais objetivos da intelig?ncia artificial ? a cria??o de agentes inspirados na intelig?ncia humana. Isso vem sendo pesquisado utilizando v?rias abordagens, e entre as mais promissoras para o aprendizado de m?quinas est?o os sistemas simb?licos baseados na l?gica e as redes neurais artificiais. At? a ?ltima d?cada, ambas as abordagens progrediam de forma independente, mas os progressos obtidos em ambas as ?reas fizeram com que os pesquisadores come?assem a investigar maneiras de integrar as duas t?cnicas. Diversos modelos que proporcionam a integra??o h?brida ou integrada desses m?todos inteligentes surgiram na d?cada de 90 e continuam sendo utilizadas e melhoradas at? hoje. Esse trabalho tem como objetivo principal a implementa??o e uso do algoritmo de convers?o neuro-simb?lica do sistema h?brido Knowledge-Based Artificial Neural Networks (KBANN). O sistema possui a capacidade de mapear um dom?nio te?rico espec?fico de regras (se-ent?o) em uma rede neural e refinar a rede utilizando t?cnicas de aprendizado. Al?m disso, como o algoritmo criado por Towell et al. (1990) n?o possui a capacidade de adquirir novos conhecimentos sem distorcer o que j? foi aprendido, utilizou-se o algoritmo TopGen (Optiz e Shavlik, 1995) para adicionar tal capacidade a rede. O trabalho utilizou um jogo de tabuleiro para realizar experimentos devido a quantidade e o conhecimento existente sobre as regras do jogo. O sistema implementado obteve resultados interessantes, mesmo com a pertuba??o do dom?nio inicial de regras (com a exclus?o parcial), obtendo uma taxa de acerto pr?xima a 100%. Portanto, a partir dos resultados obtidos foi poss?vel concluir que o sistema h?brido ? capaz de se sobrepor a situa??es adversas a qual foi submetido nessa pesquisa. / One of the main goals of artificial intelligence is the creation of agents with humanlike intelligence. This has been researched using various approaches, and among the most prominent for machine learning are logic-based symbolic systems and artificial neural networks. Until the last decade, both approaches have progressed independently, but progress in both areas has led researchers to investigate ways to integrate both approaches. Several models that provide hybrid or integrated integration of these approaches emerged in the 1990s, and continue to be used to this day. This work has as main objective the implementation and use of the Neural-Symbolic conversion algorithm of Knowledge-Based Artificial Neural Networks (KBANN), the system has the ability to map a specific theoretical domain of rules (if-then) into a neural network, and refine the network using learning techniques. In addition, since the algorithm created by (Towell et al., 1990) does not have the capacity to acquire new knowledge and introduce them to the neural network, the algorithm TopGen (Optiz and Shavlik, 1995) will be used to add The network without losing the original knowledge acquired. The work used a board game to conduct experiments due to the well established rules of the game. The implemented system obtained interesting results, even with the initial rule domain perturbation (with the exclusion of them), obtaining an accuracy rate close to 100 %. Therefore, from the obtained results it was possible to conclude that the hybrid systems are able to overlap to adverse situations which were carried out the analyzes proposed in this research.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-08-01T12:12:37Z No. of bitstreams: 1 FilipiMarquesDeSouza_DISSERT.pdf: 2397321 bytes, checksum: 6de0b5d432140e6035f286ca4eaee007 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-08-03T19:43:58Z (GMT) No. of bitstreams: 1 FilipiMarquesDeSouza_DISSERT.pdf: 2397321 bytes, checksum: 6de0b5d432140e6035f286ca4eaee007 (MD5) / Made available in DSpace on 2017-08-03T19:43:58Z (GMT). No. of bitstreams: 1 FilipiMarquesDeSouza_DISSERT.pdf: 2397321 bytes, checksum: 6de0b5d432140e6035f286ca4eaee007 (MD5) Previous issue date: 2017-03-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os crescentes desenvolvimentos tecnol?gicos e econ?micos convergem para a necessidade de cria??o de materiais cada vez mais eficientes, os quais buscam unir alto desempenho e baixo custo. Os comp?sitos surgem como solu??o para substitui??o de materiais convencionais, por serem desenvolvidos para aplica??es especificas, podendo apresentar caracter?sticas desejadas. Os tecidos h?bridos aplicados em comp?sitos fibrosos, se projetados adequadamente, possibilitam uma melhoria ainda maior no rendimento, j? que, diferentemente dos tecidos convencionais, os tecidos h?bridos combinam fibras diferentes com alinhamento dependente do tipo de solicita??o de carga, podendo obter um material mais eficiente. Neste trabalho, foram realizadas an?lises com o intuito de estudar o comportamento de uma l?mina de comp?sito refor?ado por tecido h?brido bidirecional vidro/carbono em presen?a de descontinuidades geom?tricas. Para a realiza??o desse estudo o comp?sito foi fabricado a partir do processo de moldagem manual (hand-lay up). A partir dos ensaios realizados, de acordo com as normas da ASTM, obtiveram-se as caracter?sticas e propriedades do material (Percentual m?ssico e volum?trico de fibras, gr?ficos de tens?o x deforma??o, resist?ncia ?ltima e m?dulo de elasticidade). Foram analisadas configura??es com as fibras alinhadas nas dire??es principais (0? e 90?) e em ?ngulo (30?, 45? e 60?). A l?mina obteve um percentual m?ssico total de fibras de 38,98%, sendo 19,49% de fibra de vidro e 19,49% de fibra de carbono. J? para o percentual volum?trico obtiveram-se os seguintes resultados: 10,91% de fibra de vidro e 14,88% de fibra de carbono. A partir dos resultados obtidos nos ensaios de tra??o p?de-se observar que os materiais com fibras em ?ngulo apresentam resist?ncia inferior aos com alinhamento na dire??o principal e ao mesmo tempo apresentaram maiores alongamentos. A resist?ncia residual apresentou resultados semelhantes tendo valores em torno de 0,774, exceto para o material com angula??o de 30?, o qual apresentou um valor de 0,676. Diante dos resultados encontrados, torna-se evidente que a descontinuidade geom?trica ? um fator relevante na resist?ncia deste comp?sito e deve ser considerada. / The technological and economic development growing converge to the necessity of create increasingly efficient materials, which seek to combine high performance and low cost. The composites appear as solution to substitute conventional materials, because they are developed for specific applications and may have desired characteristics. Hybrid fabrics applied to fibrous composites, if adequately designed, allow an even greater improvement in efficiency, since, unlike conventional fabrics, these combine different fibers with different load-dependent alignment and can obtain a more efficient material. In this work, analyzes were carried out with the aim of studying the behavior of a composite lamina reinforced by bi - directional (glass/carbon) hybrid fabric in presence of geometric discontinuities. In order to carry out this study, the composite material was fabricated from the manual molding process (hand-lay up). From the tests performed, according to ASTM standards, the characteristics and properties of the material were obtained (mass and volume percentages of fibers, stressstrain curve, ultimate strength and modulus of elasticity). Configurations were made with fibers aligned in the main directions (0? and 90?) and at angles (30?, 45? and 60?). The composite lamina had a total mass percentage of fibers of 38.98%, being 19.49% of glass fiber and 19.49% of carbon fiber. For the volumetric percentage, the following results were obtained: 10.91% of glass fiber and 14.88% of carbon fiber. From the results obtained in the stress tests it was noted that the materials with angled fibers have lower resistance than those with alignment in the main direction and at the same time they presented greater stretches. The residual strength presented similar results having values around 0.774, except for the material with 30? angulations', which presented a value of 0.676. Considering the found results, it is evident that the geometric discontinuity is a relevant factor in the strength of this composite and should be considered.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-13T19:28:10Z No. of bitstreams: 1 PedroBaesseAlvesPereira_DISSERT.pdf: 1699674 bytes, checksum: f6af93574e41ad6736f18ad1e075daae (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-02-14T18:35:46Z (GMT) No. of bitstreams: 1 PedroBaesseAlvesPereira_DISSERT.pdf: 1699674 bytes, checksum: f6af93574e41ad6736f18ad1e075daae (MD5) / Made available in DSpace on 2017-02-14T18:35:46Z (GMT). No. of bitstreams: 1 PedroBaesseAlvesPereira_DISSERT.pdf: 1699674 bytes, checksum: f6af93574e41ad6736f18ad1e075daae (MD5) Previous issue date: 2016-07-29 / O fornecimento de energia el?trica tem sido considerado um aspecto cr?tico da vida moderna, atuando como papel central no cen?rio econ?mico da maioria dos pa?ses. Com a preocupa??o ambiental, econ?mica e a evolu??o tecnol?gica, a energia e?lica se tornou uma op??o vi?vel de fonte alternativa de energia el?trica. Para a obten??o desse tipo de gera??o el?trica ? necess?ria a constru??o de parques e?licos, que s?o projetos de alta complexidade. Com o intuito de ajudar no processo de edifica??o civil desse tipo de empreendimento, esta pesquisa prop?e um modelo h?brido de planejamento e controle de gerenciamento de projetos para auxiliar a constru??o civil de parques e?licos. A primeira parte da pesquisa foi constitu?da de uma investiga??o de campo preliminar e de estudo da literatura sobre gerenciamento de projetos, energia e?lica e constru??o de parques e?licos. Na segunda etapa, um estudo de caso de constru??o de parque e?lico foi feito, considerado a refer?ncia de constru??o civil para o melhor entendimento do seu processo e de como o gerenciamento de projetos foi usado. Assim, foi proposto um modelo h?brido de planejamento e controle da constru??o civil de parques e?licos que aprimoram a execu??o de projetos, aperfei?oando ?ndices de car?ter financeiro, de satisfa??o do cliente e de compet?ncia em projetos. / The supply of electricity has been considered a critical aspect of the modern life, working as a central role in the economic situation of most countries. The environmental, economic concerns and the technological evolution allowed the consolidation of wind energy as a viable alternative energy source. To produce this type of electricity generation is required the construction of wind farms, which are high complexity projects. This research aims to propose a hybrid management project model of planning and controlling to assist the construction of wind farms by helping the process of building this sort of constructions. The first part of research was a preliminary field investigation and literature study on project management, wind power and construction of wind farms. During the second phase, the case study was performed about the construction of a wind farm, that is considered a reference in civil construction to better understand its process and how the project management was used. With this information, the planning and controlling hybrid model for construction of wind farms was proposed. It aims the improvement of wind projects edification resulting in better financial, customer satisfaction and skill projects aspects.