Made available in DSpace on 2016-04-26T20:48:32Z (GMT). No. of bitstreams: 1 Luciana Tavares Prado.pdf: 487330 bytes, checksum: 7766d9ee287262399f949989ae8a10da (MD5) Previous issue date: 2011-05-23 / Various economic currents indicate information and knowledge as bases for economic development, having the Internet as one of the most important tools for dissemination and access to information: is the basic infrastructure of the new technological paradigm; is a vector of social and economic transformations, either by business networks, ecommerce or social networks and isn't just a means of mass communication. Therefore, from the theoretical basis of the Neo-schumpeterians or Evolutionary, the study developed by this Dissertation shows the importance of information and knowledge in the economy. It raises a brief history of the Internet, their introduction in Brazil and its regulation. It does an analysis on the Internet in the Brazilian economy, its infrastructure, using researchs conducted by Internet Management Committee (CGI.br), Brazilian Federation of Banks (FEBRABAN), among others / Diversas correntes econômicas apontam a informação e o conhecimento como bases para o desenvolvimento econômico, tendo a Internet como uma das mais importantes ferramentas de difusão e acesso à informação: é a infra-estrutura básica do novo paradigma tecnológico; é um vetor de transformações econômicas e sociais, seja pelas redes empresariais, e-commerce ou redes sociais e não é só um meio de comunicação em massa. Assim, a partir da base teórica da corrente ligada aos neo-schumpeterianos ou evolucionistas, o estudo desenvolvido por esta Dissertação mostra a importância da informação e do conhecimento na economia. Levanta um breve histórico da Internet, sua introdução no Brasil e sua regulação. Faz uma análise sobre a Internet na economia brasileira, sua infra-estrutura e características, utilizando as pesquisas realizadas pelo Comitê Gestor da Internet (CGI.br), Federação Brasileira de Bancos (FEBRABAN), entre outros

O Brasil apresentou nas décadas de 80 e 90 taxas de crescimento econômico substancialmente inferiores às de outras economias emergentes. Apesar das taxas brasileiras terem se elevado a partir de 2004, tal mudança é, em parte, atribuída a uma conjuntura favorável, de altos preços das commodities. As novas teorias de crescimento econômico ressaltam a relevância do investimento em tecnologia para se alcançar um crescimento sustentável no longo prazo. No entanto, o desempenho brasileiro em investimento em P&D é relativamente baixo quando comparado ao de outros países. Teorias Schumpeterianas de crescimento e trabalhos sobre comércio internacional ressaltam a importância da criação de um ambiente favorável ao investimento em P&D, através do estimulo à competição industrial e empresarial que é criada com a abertura comercial. Sendo assim, o presente estudo pretende avaliar empiricamente o impacto da competição internacional sofrida pelas firmas brasileiras sobre suas decisões de investimento em P&D. Para isso, será construído um modelo relacionando as variáveis relevantes, e serão utilizadas técnicas econométricas, a partir de dados da PINTEC, PIA e outras bases de dados industriais. / Brazilian growth rates in the 80\'s and 90\'s were lower than in other emerging economies. The new theories of economic growth emphasize the relevance of investment in technology to achieve sustainable growth in the long term. However, Brazilian performance in R&D expenditures is relatively low compared to other countries. Schumpeterian growth theories and some studies on international trade emphasize the importance of creating an environment conducive to investment in R&D, through the stimulus to competition, which can be increased by trade openness. Therefore, this study aims to empirically assess the impact of international competition suffered by Brazilian firms on their R&D decisions. In order to achieve that, econometric techniques relating relevant variables will be used, with data from PINTEC, PIA and other industrial database.

Ce travail s’inscrit dans le cadre d’étude de la sûreté de fonctionnement. La sûreté de fonctionnement est progressivement devenue partie intégrante de l’évaluation des performances des systèmes industriels. En effet, les pannes d’équipements, les pertes de production consécutives, et la maintenance des installations ont un impact économique majeur dans les entreprises. Il est donc essentiel pour un manager de pouvoir estimer de manière cohérente et réaliste les coûts de fonctionnement de l’entreprise, en tenant notamment compte des caractéristiques fiabilistes des équipements utilisés, ainsi que des coûts induits entre autres par le non-fonctionnement du système et la restauration des performances de ses composants après défaillance. Le travail que nous avons réalisé dans le cadre de ce doctorat se concentre sur un aspect particulier de la sûreté de fonctionnement, à savoir les politiques de remplacement d’équipements basées sur la fiabilité des systèmes qu’ils constituent. La recherche menée part de l’observation suivante : si la littérature consacrée aux politiques de remplacement est abondante, elle repose généralement sur l’hypothèse implicite que les nouveaux équipements envisagés présentent les mêmes caractéristiques et performances que celles que possédaient initialement les composants objets du remplacement. La réalité technologique est souvent bien différente de cette approche, quelle que soit la discipline industrielle envisagée. En effet, de nouveaux équipements sont régulièrement disponibles sur le marché ; ils assurent les mêmes fonctions que des composants plus anciens utilisés par une entreprise, mais présentent de meilleures performances, par exemple en termes de taux de défaillance, consommation d’énergie, " intelligence " (aptitude à transmettre des informations sur leur état de détérioration)... De plus, il peut devenir de plus en plus difficile de se procurer des composants de l’ancienne génération pour remplacer ceux qui ont été déclassés. Cette situation est généralement appelée obsolescence technologique. Le but de ce travail est de prolonger et d’approfondir, dans le cadre de la sûreté de fonctionnement, les réflexions engagées par les différents articles présentés dans la section état de l’art afin de définir et de modéliser des stratégies de remplacements d’équipements soumis à obsolescence technologique. Il s’agira de proposer un modèle, faisant le lien entre les approches plus économiques et celles plus fiabilistes, permettant de définir et d’évaluer l’efficacité, au sens large, des différentes stratégies de remplacement des unités obsolètes. L’efficacité d’une stratégie peut se mesurer par rapport à plusieurs critères parfois contradictoires. Parmi ceux-ci citons, évidemment, le coût total moyen engendré par la stratégie de remplacement, seul critère considéré dans les articles cités au chapitre 2, mais aussi la façon dont ces coûts sont répartis au cours du temps tout au long de la stratégie, la variabilité de ces coûts autour de leur moyenne, le fait de remplir certaines conditions comme par exemple d’avoir remplacé toutes les unités d’une génération par des unités d’une autre génération avant une date donnée ou de respecter certaines contraintes sur les temps de remplacement. Pour arriver à évaluer les différentes stratégies, la première étape sera de définir un modèle réaliste des performances des unités considérées, et en particulier de leur loi de probabilité de défaillance. Etant donné le lien direct entre la probabilité de défaillance d’un équipement et la politique de maintenance qui lui est appliquée, notamment la fréquence des maintenances préventives, leur effet, l’effet des réparations après défaillance ou les critères de remplacement de l’équipement, un modèle complet devra considérer la description mathématique des effets des interventions effectuées sur les équipements. On verra que la volonté de décrire correctement les effets des interventions nous a amené à proposer une extension des modèles d’âge effectif habituellement utilisés dans la littérature. Une fois le modèle interne des unités défini, nous développerons le modèle de remplacement des équipements obsolètes proprement dit. Nous appuyant sur la notion de stratégie K proposée dans de précédents travaux, nous verrons comment adapter cette stratégie K à un modèle pour lequel les temps d’intervention ne sont pas négligeables et le nombre d’équipes limité. Nous verrons aussi comment tenir compte dans le cadre de cette stratégie K d’une part des contraintes de gestion d’un budget demandant en général de répartir les coûts au cours du temps et d’autre part de la volonté de passer d’une génération d’unités à l’autre en un temps limité, ces deux conditions pouvant être contradictoires. Un autre problème auquel on est confronté quand on parle de l’obsolescence technologique est le modèle d’obsolescence à adopter. La manière dont on va gérer le risque d’obsolescence dépendra fortement de la manière dont on pense que les technologies vont évoluer et en particulier du rythme de cette évolution. Selon que l’on considère que le temps probable d’apparition d’une nouvelle génération est inférieur au temps de vie des composants ou supérieur à son temps de vie les solutions envisagées vont être différentes. Lors de deux applications numériques spécifiques. Nous verrons au chapitre 12 comment envisager le problème lorsque l’intervalle de temps entre les différentes générations successives est largement inférieur à la durée de vie des équipements et au chapitre 13 comment traiter le problème lorsque le délai entre deux générations est de l’ordre de grandeur de la durée de vie des équipements considérés. Le texte est structuré de la manière suivante : Après une première partie permettant de situer le contexte dans lequel s’inscrit ce travail, la deuxième partie décrit le modèle interne des unités tel que nous l’avons utilisé dans les différentes applications. La troisième partie reprend la description des stratégies de remplacement et des différentes applications traitées. La dernière partie permet de conclure par quelques commentaires sur les résultats obtenus et de discuter des perspectives de recherche dans le domaine.

Since the dawn of the capitalist epoch, most advanced countries have seen more than a hundred fold change in their total products. This combined with a near five fold change in population size had brought a huge windfall of wealth in these countries. The main engine for this capitalist machine has been the accelaration of technical progress (Maddison, 1982). In this paper we investigate for the positive relationship between the existing stock of technology and accelaration of technical progress. We use the time series data from 1982-2002 to test our regression model. The model encapsulates annual patents turnover (proxy for acceleration of technical progress), patent stock (proxy for technological stock) and R&D expenditures of four advanced countries as the primary variables, where the former acts as the dependent variable and the later two act as the determinant variables. The model projects a highly significant positive relationship between technology stock and the pace of technological progress, endorsing our hypothesis.

Among better-educated employed workers, the fraction of full-time full-year (FTFY) workers is quite high and stable over time in the U.S. Among those with low education levels, however, this fraction is much lower and considerably more volatile. These observations suggest that the composition of unobserved skills is subject to sharp movements within low-educated employed workers, while the scale of these movements is potentially much smaller within high-educated ones. The standard college premium framework accounts for the observed shifts between education categories, but it cannot account for unobserved compositional changes within education categories. This thesis uses Heckman&#039 / s two-step estimator on repeated Current Population Survey cross sections to calculate a relative supply series that corrects for unobserved compositional shifts due to selection in and out of the FTFY status. We find that the well-documented deceleration in the growth rate of relative supply of college-equivalent workers after mid-1980s becomes even more pronounced once we correct for selectivity. This casts further doubt on the relevance of the plain skill-biased technical change hypothesis. We conclude that what happens to the within-group skill composition for low-educated groups is critical for fully understanding the trends in the relative supply of college workers in the United States.

Among better-educated employed workers, the fraction of full-time full-year (FTFY) workers is quite high and stable over time in the U.S. Among those with low education levels, however, this fraction is much lower and considerably more volatile. These observations suggest that the composition of unobserved skills is subject to sharp movements within low-educated employed workers, while the scale of these movements is potentially much smaller within high-educated ones. The standard college premium framework accounts for the observed shifts between education categories, but it cannot account for unobserved compositional changes within education categories. This thesis uses Heckman&#039 / s two-step estimator on repeated Current Population Survey cross sections to calculate a relative supply series that corrects for unobserved compositional shifts due to selection in and out of the FTFY status. We find that the well-documented deceleration in the growth rate of relative supply of college-equivalent workers after mid-1980s becomes even more pronounced once we correct for selectivity. This casts further doubt on the relevance of the plain skill-biased technical change hypothesis. We conclude that what happens to the within-group skill composition for low-educated groups is critical for fully understanding the trends in the relative supply of college workers in the United States.

How the record company EMI records have change thier business model due to technological improvements.

This study aimed to investigate the factors affecting faculty intention to use course management systems (CMS). The study was conducted in a private university with a mixed-method approach. First, 260 responses to a questionnaire was analysed by using structural equation modeling technique in order to examine the provided model. Second, interviews with selected 14 faculty members were conducted to understand the interrelationships. The findings indicated that, faculty intention to use CMS is mostly related with seeing value in using CMS including both personal and task/course related issues. In addition, the use of CMS should be perceived as easy which is directly influenced by the computer self-efficacy of the instructors. Discrimination of perceived personal benefits and task/course related usefulness is found to be important. Course/task related perceived usefulness is found to be weak without perceiving them personally beneficial. Availability of training and support is found to be weakly related to initial intention, however it appeared as an important variable for continuing to use CMS. &lsquo / Communicating the vision through leadership&rsquo / , &lsquo / promoting CMS&rsquo / , and &lsquo / sharing experiences and real life examples&rsquo / emerged as powerful approaches to facilitate use of CMS. Institutional policies regarding issues like &lsquo / academic freedom&rsquo / should be considered carefully while supporting the use of CMS. Moreover, to support institutional change it is important to be aware of the existence of different faculty profiles, which should be considered separately in relevant decisions.

<p>How the record company EMI records have change thier business model due to technological improvements.</p>

<p>Since the dawn of the capitalist epoch, most advanced countries have seen more than a hundred fold change in their total products. This combined with a near five fold change in population size had brought a huge windfall of wealth in these countries. The main engine for this capitalist machine has been the accelaration of technical progress (Maddison, 1982). In this paper we investigate for the positive relationship between the existing stock of technology and accelaration of technical progress. We use the time series data from 1982-2002 to test our regression model. The model encapsulates annual patents turnover (proxy for acceleration of technical progress), patent stock (proxy for technological stock) and R&D expenditures of four advanced countries as the primary variables, where the former acts as the dependent variable and the later two act as the determinant variables. The model projects a highly significant positive relationship between technology stock and the pace of technological progress, endorsing our hypothesis.</p>