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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Pol?tica de promo??o da exporta??o : um olhar sobre a evolu??o da cultura de mel?o do Rio Grande do Norte

Reis J?nior, Francisco Nunes dos 21 September 2007 (has links)
Made available in DSpace on 2014-12-17T13:53:14Z (GMT). No. of bitstreams: 1 FranciscoNRJ.pdf: 567211 bytes, checksum: d018fd8893a9c5eb9c8e9bdb1c2363fa (MD5) Previous issue date: 2007-09-21 / Some sectors in Brazil are earning notoriety in the international market, configuring itself in dynamic areas for the Country. The most typical case is the agribusiness. Rio Grande do Norte state has important role, because 90% of the output of the melon exported by Brazil is produced at Assu/Mossor?. The present work planned to verify the evolution of the culture of the melon produced at Assu/Mossor? area, from 1990 to 2003. Through descriptive research, utilizing the case study and documentary analysis of secondary data this work showed the evolution of the area reaped of melon in the pole Assu/Mossor?, the quantity produced of melon and of the value of the output of the melon between 1990 and 2003. The research verified that all of the factors studied show growth during the analyzed period, showing up the importance of the agribusiness for the region. However the analysis shows the vulnerability of the sector concerning external macroeconomics factors, such as the exchange rates. Showing the importance and/or dependence of the producers for public actions to development of the culture, that might be on areas like infrastructure, economics or taxes / Alguns setores no Brasil v?m ganhando proemin?ncia no mercado internacional, configurando-se em ?reas din?micas para o Pa?s. O caso mais t?pico ? o do agroneg?cio. Dentro deste contexto do agroneg?cio, o Rio Grande do norte apresenta um papel importante, pois 90% da produ??o do mel?o exportado pelo Brasil ? produzido no vale do Assu/Mossor?. O presente trabalho objetivou verificar a evolu??o da cultura do mel?o no p?lo Assu/Mossor?, no Rio Grande do Norte no per?odo de 1990 a 2003. Atrav?s de pesquisa descritiva, utilizando-se de estudo de caso e an?lise documental de fontes secund?rias este trabalhou mapeou a evolu??o da ?rea colhida de mel?o no p?lo Assu/Mossor?, da quantidade produzida de mel?o e do valor da produ??o do mel?o entre 1990 e 2003. Verificou-se que todos os fatores estudados possuem ?ndices de crescimento dentro do per?odo analisado, evidenciando a import?ncia do agroneg?cio para a regi?o.Todavia as an?lises demonstram a vulnerabilidade do setor a fatores macroecon?mico externos como as taxas cambiais. Evidenciado, assim a import?ncia e/ou depend?ncia dos produtores de a??es publicas para desenvolvimento da cultura, seja nas ?reas de infra-estrutura, econ?micas ou tribut?rias
2

Competitividade de destinos tur?sticos e o imperativo sustent?vel: avalia??o de dimens?es e atributos condicionantes no P?lo Costa das Dunas, RN, Brasil / Competitiveness of tourist destinations and the sustainable imperative: an evaluation of dimensions and attributes constraints on Polo Costa das Dunas, RN, Brazil

Cerqueira, Liz Rodrigues 30 October 2010 (has links)
Made available in DSpace on 2014-12-17T15:51:28Z (GMT). No. of bitstreams: 1 LizRC_DISSERT.pdf: 4677127 bytes, checksum: 6c4dcd06c105dcf6dfd1ee295d119df9 (MD5) Previous issue date: 2010-10-30 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / Being available as a tourist destination is a necessary condition but not enough for the expansion and success of tourism activity. To be successful, tourism requires investment, inputs, appropriate planning and management, like any other economic activity. A fundamental goal of the destination management is to understand how the competitiveness of a tourist destination can be improved and sustained. Competitive position of tourism can be measured and assessed by various models. Evaluating the indicators of competitiveness of a tourist destination involves a multivariate analysis, ranging from issues directly related to tourism activity itself to the indirect factors. These are elements that are interrelated and that together will point out the competitive condition of this destination. From the definition and characterization of competitiveness, sustainability and management in the context of tourist destinations, understood as the main concepts of this study, we present the main theoretical and methodological models of assessment of competitiveness of tourist destinations in the literature and represent the state of the issue in the scientific treatment of the subject. These models, designed by researchers from several countries and applied in different tourist destinations, are confronted about their structure, indicators considered and localities in which they were applied. The aim of this study was to know and evaluate the condition of tourist competitiveness of the destination P?lo Costa das Dunas, from the constraints attributes of superior performance of the evaluation model of tourist competitiveness of destinations Competenible, suggested by Mazaro, and that suit the requirements of international market aware of the strength and importance of sustainability. The condition of competitiveness of tourist destination in Rio Grande do Norte P?lo Costa das Dunas was moderate. The competitive strengths and weaknesses of the destination P?lo Costa das Dunas revealed through the dozens of sustainable attributes of the model Competenible showed guidelines and initiatives that can be taken to guide strategic decisions related to their planning and management. Thus, this study should serve as support for strategic planning and long-term management of the sector and as a crucial tool for making decisions related to public policies, sectoral investments, monitor processes, strategic planning, direction and control of the local and regional tourism development of destinations / Estar dispon?vel como destino tur?stico ? uma condi??o necess?ria, mas n?o suficiente para a expans?o e ?xito da atividade do turismo. Para ser bem-sucedido, o turismo requer investimentos, insumos, planejamento e gest?o adequados, como qualquer outra atividade econ?mica. Um dos objetivos fundamentais da gest?o de destino ? entender como a competitividade de um destino tur?stico pode ser melhorada e sustentada. A posi??o competitiva do turismo pode ser mensurada, medida e avaliada por diversos modelos. Avaliar os indicadores da competitividade de um destino tur?stico envolve uma an?lise multivariada, que vai desde aspectos ligados diretamente a atividade do turismo em si a fatores indiretos. Trata-se de elementos que se inter-relacionam e que, juntos, v?o apontar a condi??o competitiva desse destino. A partir da defini??o e caracteriza??o da competitividade, sustentabilidade e gest?o no ?mbito dos destinos tur?sticos, entendidos como os principais conceitos deste estudo, s?o apresentados os principais modelos te?ricos e metodol?gicos de avalia??o de competitividade de destinos tur?sticos da literatura atual e representam o estado da quest?o no tratamento cient?fico do tema. Tais modelos, concebidos por pesquisadores de diversos pa?ses e aplicados em diferentes destinos tur?sticos, s?o confrontados quanto a sua estrutura, indicadores considerados e localidades em que foram aplicados. O objetivo deste estudo foi conhecer e avaliar a condi??o de competitividade tur?stica do destino P?lo Costa das Dunas, a partir dos atributos condicionantes de desempenho superior do modelo de avalia??o da competitividade tur?stica de destinos Competenible, proposto por Mazaro, e que se ad?quam ?s exig?ncias do mercado internacional consciente da for?a e import?ncia da sustentabilidade. A condi??o de competitividade do destino tur?stico potiguar P?lo Costa das Dunas foi moderada. As potencialidades e debilidades competitivas do destino P?lo Costa das Dunas reveladas atrav?s das dezenas de atributos sustent?veis do modelo Competenible apontaram lineamentos e iniciativas que podem ser tomadas no sentido de orientar decis?es estrat?gicas relacionadas ao seu planejamento e gest?o. Nesse sentido, este estudo deve servir como suporte ao planejamento estrat?gico e de gest?o a longo prazo do setor e como instrumento determinante para a tomada de decis?es relacionadas ?s pol?ticas p?blicas, investimentos setorial, monitoramento dos processos, planejamento estrat?gico, direcionamento e controle do desenvolvimento tur?stico local e regional de destinos
3

Redes interorganizacionais e inova??o: o caso do p?lo joalheiro de Bel?m

Castro, Renato Brito de 31 July 2008 (has links)
Made available in DSpace on 2014-12-17T13:53:18Z (GMT). No. of bitstreams: 1 RenatoBC.pdf: 713771 bytes, checksum: 05f4c10f6a842fb0dea5b93abe61af5e (MD5) Previous issue date: 2008-07-31 / This work is a case study based on Bel?m Jewelry Pole, whose main issue is to understand how the social network (which the Pole is inserted) influences on innovation process on this area. The main objective is to analyze how interorganizational networks impacted/impact on the potential for innovation, creating both limits and opportunities for the companies development. The adopted method analyzed the historical jewelry industry trajectory since the beginning of mineral extraction in the city of Itaituba (in the Par? State) until nowadays. Primary and secondary data were used allowing the view of the dynamics of the network during transformation periods of the main involved actors in the process. The prospect of embeddedness structural as analysis technique allowed verifying the quality of interactors ties, as well as the visualization of their structures. During the jewelry industry trajectory was verified a change in the quality of social relations, modifying the information flow, trust and associations of various links in the production chain. Both direct and indirect ties facilitated the access to remote networks entering new information related to new products, processes and market aspects. This interaction has led to raising the innovation potential causing a qualitative and quantitative improvement in competitiveness of organizations. Some embedded ties allowed the formation of partnerships bringing various economic earnings for those involved in the relationship. Thus, it is understood how aspects related to the position, architecture and quality of ties in a wide social network influenced on the innovation process and eventual jewelry industry trajectory / Este trabalho consiste em um estudo de caso no P?lo Joalheiro de Bel?m, cuja problem?tica central est? em compreender como a rede social onde est? imerso o P?lo, influencia no processo de inova??o do setor. O objetivo central est? em analisar como as redes interorganizacionais impactaram/impactam no potencial de inova??o, criando tanto limites, como oportunidades para o desenvolvimento das organiza??es. O m?todo adotado analisou a trajet?ria hist?rica do setor desde o in?cio da extra??o mineral, no munic?pio de Itaituba-PA, at? os dias de hoje. Dados prim?rios e secund?rios foram utilizados possibilitando a visualiza??o da din?mica da rede nos per?odos de transforma??o dos principais atores envolvidos no processo. A perspectiva da imers?o estrutural como t?cnica de an?lise permitiu verificar a qualidade dos la?os interatores, assim como, ? visualiza??o de suas estruturas. No decorrer da trajet?ria do setor se verificou uma mudan?a na qualidade das rela??es sociais modificando o fluxo de informa??es, a confian?a e o associativismo dos diversos elos da cadeia produtiva. Tanto la?os diretos como os indiretos facilitaram o acesso a redes distantes inserindo novas informa??es relacionadas a produtos, processos e aspectos mercadol?gicos. Essa intera??o propiciou uma eleva??o no potencial de inova??o provocando um salto qualitativo e quantitativo na competitividade das organiza??es. Alguns la?os imersos possibilitaram a forma??o de parcerias trazendo diversos ganhos econ?micos para os agentes envolvidos na rela??o. Assim, se percebeu como os aspectos relacionados ? posi??o, arquitetura e qualidade dos la?os em uma rede social ampla influenciaram no processo de inova??o e conseq?ente trajet?ria do setor joalheiro.
4

T?cnica de controle adaptativo robusto aplicada a filtros ativos de pot?ncia e paralelo

Braz, ?rico Cadineli 26 March 2010 (has links)
Made available in DSpace on 2014-12-17T14:55:43Z (GMT). No. of bitstreams: 1 EricoCB_DISSERT.pdf: 1960043 bytes, checksum: 7c0ebefa8d09683721a890c3c7d00bbb (MD5) Previous issue date: 2010-03-26 / The Methods for compensation of harmonic currents and voltages have been widely used since these methods allow to reduce to acceptable levels the harmonic distortion in the voltages or currents in a power system, and also compensate reactive. The reduction of harmonics and reactive contributes to the reduction of losses in transmission lines and electrical machinery, increasing the power factor, reduce the occurrence of overvoltage and overcurrent. The active power filter is the most efficient method for compensation of harmonic currents and voltages. The active power filter is necessary to use current and voltage controllers loop. Conventionally, the current and voltage control loop of active filter has been done by proportional controllers integrative. This work, investigated the use of a robust adaptive control technique on the shunt active power filter current and voltage control loop to increase robustness and improve the performance of active filter to compensate for harmonics. The proposed control scheme is based on a combination of techniques for adaptive control pole placement and variable structure. The advantages of the proposed method over conventional ones are: lower total harmonic distortion, more flexibility, adaptability and robustness to the system. Moreover, the proposed control scheme improves the performance and improves the transient of active filter. The validation of the proposed technique was verified initially by a simulation program implemented in C++ language and then experimental results were obtained using a prototype three-phase active filter of 1 kVA / Os m?todos para compensa??o de correntes e tens?es harm?nicas v?m sendo bastante utilizados, visto que esses m?todos permitem reduzir a n?veis aceit?veis as distor??es harm?nicas nas tens?es ou correntes em um sistema el?trico de pot?ncia, e ainda, compensar reativos. A redu??o de harm?nicas e reativos contribuem para: a diminui??o das perdas nas linhas de transmiss?o e nas m?quinas el?tricas, o aumento do fator de pot?ncia e a redu??o de ocorr?ncias de sobretens?es e sobrecorrentes. O filtro ativo de pot?ncia ? o m?todo mais eficiente para compensa??o de correntes e tens?es harm?nicas. No filtro ativo de pot?ncia ? necess?ria a utiliza??o de controladores para as malhas de corrente e tens?o. Convencionalmente, o controle dessas malhas tem sido feito por controladores proporcionais integrativos. Neste trabalho, ? investigado o uso de uma t?cnica de controle adaptativo robusto nas malha de corrente e tens?o, do filtro ativo de pot?ncia em paralelo trif?sico, para aumentar a robustez e melhorar o desempenho desse filtro ativo na compensa??o de harm?nicos. A t?cnica de controle proposta ? baseada na combina??o das t?cnicas de controle adaptativo por posicionamento de p?los e de estrutura vari?vel. As vantagens do m?todo proposto sobre os convencionais s?o: menor taxa de distor??o harm?nica, maior flexibilidade, capacidade de adapta??o e robustez para o sistema. Al?m disso, a t?cnica de controle proposta aumenta o desempenho e melhora o transit?rio do filtro ativo. A valida??o da t?cnica proposta foi verificada inicialmente atrav?s de um programa de simula??o implementado em linguagem C ++ e em seguida foram obtidos resultados experimentais usando um prot?tipo de um filtro ativo trif?sico de 1 kVA

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