Made available in DSpace on 2014-12-17T15:05:04Z (GMT). No. of bitstreams: 1 RogerioGA_DISSERT.pdf: 8092447 bytes, checksum: 8092c9fc8e1a9696dd331b3c086d01ac (MD5) Previous issue date: 2013-09-05 / The National Program of Professional Education Integration with Basic Education for Youngsters and Adults (PROEJA) Technical Professional Education Ensino M?dio has opened a new chapter in the history of education in Brazil, making possible the integration of basic education and professional education. This new form of education, which is still in its early implementation, presents a series of challenges to be overcome. Specifically about the teaching of Chemistry, didactic material to match PROEJA s specific needs is practically inexistent. Thus, this work has the purpose of developing didactic material for the teaching of Chemistry for Professional and Technological Education of Youngsters and Adults in the courses of Electronics, Technical Electronics and Maintenance and Support for Computing at Instituto Federal de Educa??o,Ci?ncia e Tecnologia do Rio Grande do Norte. This material aims at working chemical concepts of oxi-reduction reactions through a theme approach following Freire s conceptions for the teaching of Youngsters and Adults / O Programa Nacional de Integra??o da Educa??o Profissional com a Educa??o B?sica na Modalidade de Educa??o de Jovens e Adultos - Educa??o Profissional T?cnica de N?vel M?dio / Ensino M?dio (PROEJA) abriu um novo cap?tulo na hist?ria da educa??o de jovens e adultos, possibilitando a integra??o da educa??o profissional ? educa??o b?sica. Essa modalidade de educa??o, que ainda se encontra em fase inicial de implementa??o, apresenta uma s?rie de desafios a serem superados. No caso espec?fico de ensino de Qu?mica, ? praticamente inexistente material did?tico elaborado para atender ?s especificidades dos alunos do PROEJA. Nesse sentido, tivemos como prop?sito, no presente trabalho, o desenvolvimento de um material did?tico para o ensino de Qu?mica na Educa??o Profissional e Tecnol?gica de Jovens e Adultos nos cursos de eletr?nica, eletrot?cnica e manuten??o e suporte em inform?tica oferecidos pelo Instituto Federal de Educa??o,Ci?ncia e Tecnologia do Rio Grande do Norte. Esse material did?tico tem como objetivo trabalhar o conceito qu?mico de rea??es de oxirredu??o atrav?s de uma abordagem tem?tica seguindo as concep??es freireanas para Educa??o de Jovens e Adultos

Made available in DSpace on 2014-12-17T14:55:57Z (GMT). No. of bitstreams: 1 EduardoJB.pdf: 1367282 bytes, checksum: 6b7509a3a7d719223deb44d539d92c51 (MD5) Previous issue date: 2005-12-16 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The introduction of new digital services in the cellular networks, in transmission rates each time more raised, has stimulated recent research that comes studying ways to increase the data communication capacity and to reduce the delays in forward and reverse links of third generation WCDMA systems. These studies have resulted in new standards, known as 3.5G, published by 3GPP group, for the evolution of the third generation of the cellular systems. In this Masters Thesis the performance of a 3G WCDMA system, with diverse base stations and thousand of users is developed with assists of the planning tool NPSW. Moreover the performance of the 3.5G techniques hybrid automatic retransmission and multi-user detection with interference cancellation, candidates for enhance the WCDMA uplink capacity, is verified by means of computational simulations in Matlab of the increase of the data communication capacity and the reduction of the delays in the retransmission of packages of information / A introdu??o de novos servi?os digitais nas redes celulares, em taxas de transmiss?o cada vez mais elevadas, tem impulsionado recentes pesquisas que v?m estudando maneiras de aumentar a capacidade de transmiss?o de dados e diminuir os atrasos nos enlaces direto e reverso de sistemas de terceira gera??o WCDMA. Esses estudos t?m resultado em novos padr?es, chamados de 3.5G, publicados pelo grupo 3GPP, para a evolu??o da terceira gera??o dos sistemas celulares. Nesta disserta??o de mestrado o desempenho de um sistema de 3G WCDMA, com diversas esta??es base e milhares de usu?rios ? analisado com aux?lio da ferramenta de projetos NPSW. Al?m disso a performance das t?cnicas de 3.5G redu??o do tamanho do quadro de transmiss?o, retransmiss?o autom?tica h?brida e detec??o multi-usu?rio com cancelamento de interfer?ncias, candidatas para amplia??o do uplink de redes WCDMA, ? verificada por meio de simula??es computacionais, na linguagem Matlab, do aumento da capacidade de transmiss?o de dados e da diminui??o dos atrasos na retransmiss?o de pacotes de informa??o. Palavras-Chave: WCDMA, UMTS, capacidade de transmiss?o, t?cnicas de 3.5G EUL, redu??o do quadro de transmiss?o, retransmiss?o autom?tica h?brida, detec??o multi-usu?rio, cancelamento de interfer?ncias

<p>У овом раду спроведене су опсежна експериментална и нумеричка<br />испитивања понашања веза са чеоном плочом и четири завртња у реду,<br />као и карактеристичне компоненте ових веза - Т-елемента.<br />Експериментална испитивања укључују тестирања 36 узорака<br />Т-елемената у природној величини, као и четири везе греда-стуб са<br />чеоном плочом и четири завртња у реду, такође у природној величини.<br />Нумеричке анализе, спроведене у софтверском пакету ABAQUS, су<br />обухватале све типове нелинеарности, али и отказ материјала, те се као<br />такве сврставају међу ретке којима су слични проблеми нумерички<br />испитивани. Параметарска студија обухвата 33 различите конфигурације<br />Т-елемената са четири завртња и представља највећу такву студију<br />изведену за ову компоненту. Као основни још увек нерешен проблем,<br />круцијалан за понашање Т-елемената, препознати су положај сила услед<br />ефеката полуге, али и савијање завтњева. Приказан је и предложен нови<br />аналитички модел прорачуна носивости Т-елемената са четири завртња,<br />и квантификована његова предност над до сада постојећим моделима.</p> / <p>U ovom radu sprovedene su opsežna eksperimentalna i numerička<br />ispitivanja ponašanja veza sa čeonom pločom i četiri zavrtnja u redu,<br />kao i karakteristične komponente ovih veza - T-elementa.<br />Eksperimentalna ispitivanja uključuju testiranja 36 uzoraka<br />T-elemenata u prirodnoj veličini, kao i četiri veze greda-stub sa<br />čeonom pločom i četiri zavrtnja u redu, takođe u prirodnoj veličini.<br />Numeričke analize, sprovedene u softverskom paketu ABAQUS, su<br />obuhvatale sve tipove nelinearnosti, ali i otkaz materijala, te se kao<br />takve svrstavaju među retke kojima su slični problemi numerički<br />ispitivani. Parametarska studija obuhvata 33 različite konfiguracije<br />T-elemenata sa četiri zavrtnja i predstavlja najveću takvu studiju<br />izvedenu za ovu komponentu. Kao osnovni još uvek nerešen problem,<br />krucijalan za ponašanje T-elemenata, prepoznati su položaj sila usled<br />efekata poluge, ali i savijanje zavtnjeva. Prikazan je i predložen novi<br />analitički model proračuna nosivosti T-elemenata sa četiri zavrtnja,<br />i kvantifikovana njegova prednost nad do sada postojećim modelima.</p> / <p>In this research, extensive experimental and numerical investigations of<br />behaviour of end-plate moment connection with four bolts per row are<br />performed, as well as specific component of the connection &ndash; T-stub element.<br />Experimental research comprises tests on 36 unscaled specimens of T-stub<br />elements and 4 specimens of beam-to-column joints with end-plate connection<br />and four bolts per row, also in full-size. Numerical analyses, performed with<br />software ABAQUS, included all types of nonlinearities, and material<br />deterioration, hence they can be considered as one of the few most<br />sophisticated analyses used for investigation of the considered problem. The<br />parametric study comprises 33 different configurations of the T-stub element<br />with four bolts per row and it presents the biggest study of this kind for this type<br />of component. Bending of the bolts and position of the prying forces are<br />recognized as the largest, still unsolved problem, crucial for the behavior of the<br />T-stub elements. A new theoretical model for the resistance of the T-stub<br />element with four bolts per row is proposed and its advantage over the existing<br />models is presented and quantified.</p>