Economia e ecologia: um efoque global

Este artigo discute a recente contribuição de Elmar Altvater em economia política internacional cujo tema são as conseqüências econômicas e ecológicas da difusão do sistema de produção fordista. Atenção especial é dada a tese desoladora sobre os países em desenvolvimento, que decorre de suas trajetórias de pobreza e degradação ambiental prescritas no modelo de Altvater. Argumenta-se que a confiança na regulação supranacional para resolver os problemas correntes destes países pode enfrentar serias restrições políticas e econômicas.

The Economic Impacts of Tourism in Ouro Preto, MG, Brazil

The tourism spending like other activities has direct and secondary effects on the economy, and presents complex interaction with other activities deserving a special treatment for measuring its contribution to the global result of production and consumption. In this paper, it is used the Money Generation Model to measure the global economic impact of tourism sales in Ouro Preto, this method is not so limited by the data and it is able to produce good approximations to reality. It was not possible to adopt the WTO methodology due to data limitation. The results revealed the real importance of tourism for Ouro Preto, representing up to 10.4% of GDP in 2002, up to 21.8% of tax revenues in 2004, and approximately 11% of the region’s population in 2002 was related to tourism sales. Some actions can be outlined from these results in order to illustrate the current economic reality of the tourism in Ouro Preto. It is also possible to improve the tourist planning accomplished by the local City Hall in a coherent way with the economic results generated by the tourism.

Enigma do paradoxo chinês: uma análise

Pós-graduação em Economia - FCLAR

Mercado de carbono: um estudo comparado entre Brasil, China e Índia

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A construção da defesa da concorrência no MERCOSUL: uma perspectiva construtivista - cooperação e interesses nas relações internacionais

Pós-graduação em Relações Internacionais (UNESP - UNICAMP - PUC-SP) - FFC

Atividade anti - Mycobacterium tuberculosis intra e extracelular e citoxicidade dos complexos de rutênio e vanádio e seus ligantes

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

O Brasil e o novo desenvolvimentismo

The global economic scenario, from the late 1980s, it was predominantly marked by the hegemony of political and economic orthodoxy. The strength of a great political pact that brought together the financial sector, rentiers and the big capital, and had the Washington Consensus as base, induced countries to adopt liberalizing policies such as trade liberalization, privatization and deregulation. The failure of these policies, manifested in unemployment, external vulnerability and low growth has led to a change in economic direction, particularly after the election of President Lula. Amid this situation, we can see a reorientation of the role of the Brazilian state, in response to a movement of their own society organized to implement a new national strategy, with the state as a promoter of development. In this project of a new strategy, the state action becomes strategic and not systemic, turning to strengthen national companies in strategic sectors and internationally competitive. In this ongoing process of a new development strategy, we adopted the conceptualization of what Bresser-Pereira calls the new developmentalism.

Chronic Diseases: Chronic Diseases and Development 2 Health, agricultural, and economic effects of adoption of healthy diet recommendations

Transition to diets that are high in saturated fat and sugar has caused a global public health concern as the pattern of food consumption is a mayor modifiable risk factor for chronic non-communicable diseases Although agri food systems are intimately associated with this transition, agriculture and health sectors are largely disconnected in their priorities policy, and analysis with neither side considering the complex inter relation between agri trade patterns of food consumption health, and development We show the importance of connection of these perspectives through estimation of the effect of adopting a healthy diet on population health, agricultural production trade the economy and livelihoods, with a computable general equilibrium approach on the basis of case studies from the UK and Brazil we suggest that benefits of a healthy diet policy will vary substantially between different populations, not only because of population dietary intake but also because of agricultural production trade and other economic factors

A SOCIAL JUSTICE STUDY: BRAZIL

This paper discusses the question of social justice in a global world, focussing on Brazil. Though largely debated, this question has not yet been properly answered (Kelsen, 2001, p. 1). Trying to contribute to this debate, this paper raises a general thesis: social justice involves a chaotic-solidaristic integration (da Silveira, 2002) between the discourse towards the egalitarian rights and duties and its practical sustainability by ethics and democracy.

Global citizens or faraway viewers? São Paulo residents talk about the 2006 Lebanon conflict

As the emergence of a global public sphere becomes a possibility, growing out of denser economic, political and communicative networks as well as demanded by increasingly complex international problems, questions arise about the capacity and willingness of various national publics to engage in the global debate. This paper shows the results of a news reception analysis with the public of the city of São Paulo, Brazil during the months of July-November 2006, when the Lebanon conflict was broadly covered by the Brazilian media. The paper identifies the modes of engagement with the news about the international conflict, the types of reasoning used by these publics in interpreting the news, and the types of debates and conversations they have or don't have about the conflict. Special attention is given to the personal experience of learning about conflicts abroad and to the relationship between this experience and the construction of a new civic identity where participation in global affairs is an important element. The research shows that São Paulo residents are informed and care about international events, but to a large extent lack the resources and the spaces where they could reflect upon them. It also shows that young people tend to experience global events more intensely as part of their world than the general population. © 2008 Springer Science+Business Media, LLC.

A preliminary physicochemical, exergetic and economic study of hydrogen production utilizing glycerol

This work has as objective to demonstrate technical and economic viability of hydrogen production utilizing glycerol. The volume of this substance, which was initially produced by synthetic ways (from oil-derived products), has increased dramatically due mainly to biodiesel production through transesterification process which has glycerol as main residue. The surplus amount of glycerol has been generally utilized to feed poultry or as fuel in boilers, beyond other applications such as production of soaps, chemical products for food industry, explosives, and others. The difficulty to allocate this additional amount of glycerol has become it in an enormous environment problem, in contrary to the objective of biodiesel chain, which is to diminish environmental impact substituting oil and its derivatives, which release more emissions than biofuels, do not contribute to CO2-cycle and are not renewable sources. Beyond to utilize glycerol in combustion processes, this material could be utilized for hydrogen production. However, a small quantity of works (theoretical and experimental) and reports concerning this theme could be encountered. Firstly, the produced glycerol must be purified since non-reacted amounts of materials, inclusively catalysts, contribute to deactivate catalysts utilized in hydrogen production processes. The volume of non-reacted reactants and non-utilized catalysts during transesterification process could be reutilized. Various technologies of thermochemical generation of hydrogen that utilizes glycerol (and other fuels) were evaluated and the greatest performances and their conditions are encountered as soon as the most efficient technology of hydrogen production. Firstly, a physicochemical analysis must be performed. This step has as objective to evaluate the necessary amount of reactants to produce a determined volume of hydrogen and determine thermodynamic conditions (such as temperature and pressure) where the major performances of hydrogen production could be encountered. The calculations are based on the process where advance degrees are found and hence, fractions of products (especially hydrogen, however, CO2, CO, CH4 and solid carbon could be also encountered) are calculated. To produce 1 Nm3/h of gaseous hydrogen (necessary for a PEMFC - Proton Exchange Membrane Fuel Cell - containing an electric efficiency of about 40%, to generate 1 kWh), 0,558 kg/h of glycerol is necessary in global steam reforming, 0,978 kg/h of glycerol in partial oxidation and cracking processes, and 0,782 kg/h of glycerol in autothermal reforming process. The dry reforming process could not be performed to produce hydrogen utilizing glycerol, in contrary to the utilization of methane, ethanol, and other hydrocarbons. In this study, steam reforming process was preferred due mainly to higher efficiencies of production and the need of minor amount of glycerol as cited above. In the global steam reforming of glycerine, for one mole of glycerol, three moles of water are necessary to produce three moles of CO2 and seven moles of H2. The response reactions process was utilized to predict steam reforming process more accurately. In this mean, the production of solid carbon, CO, and CH4, beyond CO2 and hydrogen was predicted. However, traces of acetaldehyde (C2H2), ethylene (C2H4), ethylene glycol, acetone, and others were encountered in some experimental studies. The rates of determined products obviously depend on the adopted catalysts (and its physical and chemical properties) and thermodynamic conditions of hydrogen production. Eight reactions of steam reforming and cracking were predicted considering only the determined products. In the case of steam reforming at 600°C, the advance degree of this reactor could attain its maximum value, i.e., overall volume of reactants could be obtained whether this reaction is maintained at 1 atm. As soon as temperature of this reaction increases the advance degree also increase, in contrary to the pressure, where advance degree decrease as soon as pressure increase. The fact of temperature of reforming is relatively small, lower costs of installation could be attained, especially cheaper thermocouples and smaller amount of thermo insulators and materials for its assembling. Utilizing the response reactions process in steam reforming, the predicted volumes of products, for the production of 1 Nm3/h of H2 and thermodynamic conditions as cited previously, were 0,264 kg/h of CO (13% of molar fraction of reaction products), 0,038 kg/h of CH4 (3% of molar fraction), 0,028 kg/h of C (3% of molar fraction), and 0,623 kg/h of CO2 (20% of molar fraction). Through process of water-gas shift reactions (WGSR) an additional amount of hydrogen could be produced utilizing mainly the volumes of produced CO and CH4. The overall results (steam reforming plus WGSR) could be similar to global steam reforming. An attention must to be taking into account due to the possibility to produce an additional amount of CH4 (through methanation process) and solid carbon (through Boudouard process). The production of solid carbon must to be avoided because this reactant diminishes (filling the pores) and even deactivate active area of catalysts. To avoid solid carbon production, an additional amount of water is suggested. This method could be also utilized to diminish the volume of CO (through WGSR process) since this product is prejudicial for the activity of low temperature fuel cells (such as PEMFC). In some works, more three or even six moles of water are suggested. A net energy balance of studied hydrogen production processes (at 1 atm only) was developed. In this balance, low heat value of reactant and products and utilized energy for the process (heat supply) were cited. In the case of steam reforming utilizing response reactions, global steam reforming, and cracking processes, the maximum net energy was detected at 700°C. Partial oxidation and autothermal reforming obtained negative net energy in all cited temperatures despite to be exothermic reactions. For global steam reforming, the major value was 114 kJ/h. In the case of steam reforming, the highest value of net energy was detected in this temperature (-170 kJ/h). The major values were detected in the cracking process (up to 2586 kJ/h). The exergetic analysis has as objective, associated with physicochemical analysis, to determine conditions where reactions could be performed at higher efficiencies with lower losses. This study was performed through calculations of exergetic and rational efficiencies, and irreversibilities. In this analysis, as in the previously performed physicochemical analysis, conditions such as temperature of 600°C and pressure of 1 atm for global steam reforming process were suggested due to lower irreversibility and higher efficiencies. Subsequently, higher irreversibilities and lower efficiencies were detected in autothermal reforming, partial oxidation and cracking process. Comparing global reaction of steam reforming with more-accurate steam reforming, it was verified that efficiencies were diminished and irreversibilities were increased. These results could be altered with introduction of WGSR process. An economic analysis could be performed to evaluate the cost of generated hydrogen and determine means to diminish the costs. This analysis suggests an annual period of operation between 5000-7000 hours, interest rates of up to 20% per annum (considering Brazilian conditions), and pay-back of up to 20 years. Another considerations must to be take into account such as tariffs of utilized glycerol and electricity (to be utilized as heat source and (or) for own process as pumps, lamps, valves, and other devices), installation (estimated as US$ 15.000 for a plant of 1 Nm3/h) and maintenance cost. The adoption of emission trading schemes such as carbon credits could be performed since this is a process with potential of mitigates environment impact. Not considering credit carbons, the minor cost of calculated H2 was 0,16288 US$/kWh if glycerol is also utilized as heat sources and 0,17677 US$/kWh if electricity is utilized as heat sources. The range of considered tariff of glycerol was 0-0,1 US$/kWh (taking as basis LHV of H2) and the tariff of electricity is US$ 0,0867 US$/kWh, with demand cost of 12,49 US$/kW. The costs of electricity were obtained by Companhia Bandeirante, localized in São Paulo State. The differences among costs of hydrogen production utilizing glycerol and electricity as heat source was in a range between 0,3-5,8%. This technology in this moment is not mature. However, it allows the employment generation with the additional utilization of glycerol, especially with plants associated with biodiesel plants. The produced hydrogen and electricity could be utilized in own process, increasing its final performance.

Obrigações político-criminais do Estado frente à criminalidade econômica

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Relações de trabalho na atividade industrial de Rio Claro (SP): uma contribuição ao estudo do processo global de reestruturação produtiva da indústria

Pós-graduação em Geografia - IGCE

O regime global da propriedade intelectual e a questão do desenvolvimento: o poder dos países em desenvolvimento no campo multilateral

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)