Mestrado em Agronegócio (EA)
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Item Modelos de simulação para análise e apoio à decisão nos processos de corte mecanizado, carregamento e transporte no agronegócio da cana-de-açúcar(Universidade Federal de Goiás, 2009-07-08) BASTOS, Kamyro Jorge José Zaccaria; FIGUEIREDO, Reginaldo Santana; http://lattes.cnpq.br/1098394550647665In the current days sugarcane occupies an area of approximately 10,5 % of all the Brazilian agricultural land, with an estimated production for the 2008/2009 crop of 528 million t. In the sugarcane production process, the harvest highlights due its high costs, representing approximately 35% of the sugarcane production costs, besides the addition of operational difficulties. In search of solutions that can efficiently coordinate the mechanical cutting, loading and transportation process of sugarcane (STC), the methodology of systems simulations can be applied as a management tool for those processes. This dissertation has the objective of analyzing the technical feasibility of using computer simulation to increase the efficiency of sugarcane delivery, from the harvest to the sucroalcooleira industry. This research was based on the analysis of the following topics: a) computer simulation in agricultural production systems, b) sugarcane mechanized harvest; besides a step based on an empiric and descriptive dissertation part, which was developed with the association of the Jalles Machado Company. It was proposed a computational model, developed on the Stella Software, which allocated the following variables: a) operation filling time, b) operation travel time, c) semi-trailer filling time, d) operation travel time, e) operation transfer time, f) semi-trailer displacement time, g) lock and unlock time, h) time spent in the balance, i) Time spent from displacement to sampling, j) sampling time, k) time to displace to the hyllo , l) toppling time, m) sugarcane weighing on the semi-trailer, n) trucks speed, o) harvesters speed, p) harvesters efficiency, q) sugarcane productivity. Based on the developed models and the simulations performed it can be concluded the sugarcane harvest has a great importance on the sugarcane agribusiness, due the big amount of equipment to be administered, the high costs of the process and to be fundamental to maintain constantly the derivatives productions, such as alcohol, sugar and energy. Therefore, the use of computer simulation has shown to be a very important tool to increase the sugar cane delivery efficiency from the mechanized harvest to the sucroalcooleira industry, allowing testing and supporting decisions on this process management.Item MODELAGEM E SIMULAÇÃO DA PRODUÇÃO DE PEQUI NO TERRITÓRIO KALUNGA DE GOIÁS UTILIZANDO A METODOLOGIA SYSTEM DYNAMICS(Universidade Federal de Goiás, 2009-03-18) BUZIN, Estevão Julio Walburga Keglevich de; FIGUEIREDO, Reginaldo Santana; http://lattes.cnpq.br/1098394550647665This work presents the social and environmental factors related to community Kalunga of Goiás and its area of occupation that justifies the care to determine the possibilities for use of Territory Kalunga. Considering the importance of various interactions existing means of production factors that affect the biological, sociological and marketing, it was developed a modelling system and simulation of production pequi of the Kalunga territory in Goiás using the methodology of system dynamics. The developed system was performed with 200 replicates, assuming a period of 20 years of installation of the enterprise. To perform the analysis of sustainability of the project it was applied of a group of indicators that consider the environmental, social, economic and political. The results indicate that the implementation of a project for the production of pequi is a profitable and sustainable project in all aspects considered.Item Análise comparativa da competitividade das cadeias agroindustriais exportadoras de carne bovina em Goiás(Universidade Federal de Goiás, 2011-03-22) MACHADO, Glaucia Rosalina; FIGUEIREDO, Reginaldo Santana; http://lattes.cnpq.br/1098394550647665; WANDER, Alcido Elenor; http://lattes.cnpq.br/8250997651281553Brazil stands as the largest exporter of beef, and Goiás stands out as the second largest exporter state, third in beef production and quarter in effective herd, according to 2008 data (SEPIN, 2009a). Because of the importance of this activity to the State economy and the currency and relevance of the theme, we chose to comparatively analyze the competitiveness of agro-industrial exporting chains of beef in the State of Goiás. We started from the assumption that export food chains (formed from the slaughtering units) of beef in Goiás present settings, actors, resources and different transactions, which facilitates the design of differentiated chains. In addition, we started with the assumption that the slaughterhouses are the dynamizing actors and that the beef exporting chains in Goiás realize competitive advantages. We analyzed the areas of production (beef cattle), slaughter and processing (refrigerators), and distribution and consumption. Competitive analysis has been developed by drivers and sub-factors of competitiveness, which included 20 drivers and 146 sub-factors, considering the three segments. Their assessment was conducted from the perspective of slaughter and processing segment (refrigerators). In addition, we used secondary data and interviews with key actors. Through the data collected, it was found that the chains, even inserted a single geographical clipping, have different characteristics, such as: physical infrastructure, economic structure, management, market share, size of transactions, types of distribution channels, structure of distribution in foreign markets, types of transport, types of slaughtering, among others. Regarding coordination, the opinions of respondents disagreed, demonstrating clearly that there is no coordination defined in chain, but that the slaughters and processors are the strongest candidates do coordinate the whole chain. Even with differences in the designs of the two chains, the marks awarded to the drivers (three segments) by two refrigeration units, in most cases followed a similar trend, although not identical assignments of notes. It can be stated from the data that the two reviewed exporter chains have a competitive advantage. However, the livestock production sector had the lowest scores, demonstrating that the State of Goiás, even with comparative advantages, requires changes in management, use of more advanced technologies, and creating incentives for government actions that may be implemented. The other segments, even with the competitive advantages, require joint action in order to maintain their competitive position, and try to it. Some suggestions for joint activities involving the private and public sector were drawn up, namely: support and encourage the technological advancement of the production process and management of farms in the State of Goiás; coordination of production by market demand, adding value beef; improved system of regulation and supervision, cooperation between actors in the chain, diversification of markets for meat products, tax incentives, and improving distribution logistics.Item Análise da Composição das Culturas no Espaço Goiano, de 1990 a 2009, baseada em índices de Shift-Share(Universidade Federal de Goiás, 2011-08-08) MENDES, Heloísio Caetano; TEIXEIRA, Sônia Milagres; http://lattes.cnpq.br/1596947832723945The analyses of the dynamics of the crops composition in the State of Goiás was first started by Yokoyama (1988). Here, is made a continuity of this work and methodology enlargement elements like maps and graphics to better scrutinize the phenomenon throw the use of shift-share rates. Further socio economic inferences are based in agricultural frontier´s theory. The mathematical methods and uses, of the shift-share rates, are discussed. Using this model, the area effects are decomposed into scale and substitution effects, and it shows the geographic location effects for the selected microrregiões, and for this also the production effects. The agricultural frontier model is presented in basics ideas. The indices are presented for individual and the set of crops in the microrregiões and so are fluctuation of production of the set and location of crops in the State of Goiás. The results point changes in the crops composition in the State of Goiás. Staple food production in the new context, despite changes of territory of crops, it maintains important role in National context. It presents results about the important discussion that involves sugar-cane expansion, relations to soy-beans and cattle and conclusions about crop relations to ´cerrados´ area. The crop period goes is from 1990 to 2009.Item Determinantes da taxa de difusão tecnológica na cogeração do setor sucroalcooleiro(Universidade Federal de Goiás, 2010-08-03) NASCIMENTO, Fábio Nunes do; GOMES, Ricardo Avelino; http://lattes.cnpq.br/6538341799051577This study had as main objective to find the determinants of technology diffusion in the co-generation of energy in the sugar-alcohol sector. Specifically it was intended to work in order to analyze the relationship of technology diffusion in the process of polarization and regional growth; analyzing the composition of the Brazilian energy matrix and the share of energy generation from biomass of sugar cane; show the potential of power generation in the State of Goiás from co-generation and demonstrate that the change in technology used by sugar cane mills in Goiás can generate excess electricity for commercialization, besides the electricity supply for self-consumption. The methodology used for contemplation of the goals consisted of literature review and case study. The study allowed to reach the conclusion that the main determinants of technology diffusion in the sugar-alcohol sector are of economic order.Item Contratos agrários na agroindústria canavieira em Goiás:legalidades e conflitos(Universidade Federal de Goiás, 2010-08-09) PICANÇO FILHO, Artêmio Ferreira; MARIN, Joel Orlando Bevilaqua; http://lattes.cnpq.br/2469734454387464With the retake of the agro-energetic policies, the Central Government in Brazil was forced to present public policies to stimulate the expansion of the sugarcane agribusiness in the nation. The agroindustrial sector related to the production of juices and sugarcane derivatives in the Goiás state, experiencing a time of great expansion due to the construction of new industrial unities, opened possibilities for the participation of new segments of the society -sugarcane suppliers and landlords- in the sugarcane agroindustrial complex via rental contracts for available lands and contracts for the supply of raw material. This research was carried out via a qualitative approach and was based upon a range of methodological procedures literature research, documental research, and interviews to obtain the dataset. Since the 1930 s the Brazilian Central Government has stated laws to regulate and to discipline the contractual relationship dealt amongst the social segments involved in the sugarcane agribusiness with the purpose to promote the development of the productive segment of the country s industry, and to establish patterns for social behaviour in accordance with a rational bureaucratic administration. The conclusion is that the agrarian contracts dealt amongst the different social segments involved in the sugarcane industry, although founded upon legal apparatus, did not guarantee the farmers right, or even it did minimize the conflicts amongst the involved agents in this sector of the economy. The agroindustry holds the power of the information which generates asymmetry in the social relationship established in the agrarian contracts. From their side, the farmers landrenters or sugarcane suppliers , comply with the impositions from the sugarcane agroindustry, and continue linked to it because of the lack of better options of economic insertion.Item Determinantes do investimento em projetos de cana-de-açúcar em goiás (2007-2010)(Universidade Federal de Goiás, 2011-08-15) ZOPELARI, André Luiz Miranda Silva; FIGUEIREDO, Reginaldo Santana; http://lattes.cnpq.br/1098394550647665; TEIXEIRA, Sônia Milagres; http://lattes.cnpq.br/1596947832723945This thesis aims to look into what are the factors that fundamentally determine the variation in investment projects in sugar cane in the state of Goyaz, in particular, between 2007 and 2010, which is when they start to concentrate investment projects in the state on the screen. To address this problem, five hypotheses have been proposed: the expansion of sugarcane in the period can be explained more by productivity gains that the availability of farmland, the second hypothesis states that the tax incentive may be influencing the attraction of investments. The third hypothesis suggests that investment is driven by the sale of flex fuel cars on the national level; the fourth proposes that investments can be supported by independent Tax Credit and Technical Change, representing the diffusion of technology and in anticipation of future demands. The latter inspires the possibility that economic growth municipalities of the sugarcane have influenced the GDP of the state of Goyaz. To verify these hypotheses, we adopted the methodology for quantitative tests, such as Linear Regression, and indirect observation of the facts and indicators. However, a reference to study the problem is not enough; therefore, it was chosen a theoretical system covering the Keynesian Investment Theories, theories of innovation and technology diffusion, led by Schumpeter and his followers. The general conclusions were that there seems no evidence that the expansion of sugarcane is supported by productivity gains; it seems, however, that tax incentives actually influence the attraction of investment; yet, the tests allow us to infer that it appears that investments are being driven by domestic sales of hybrid cars. It also seems to correspond to technological diffusion autonomous investment, as well as the evidence makes it seem that economic growth of municipalities upholding sugarcane has influenced the state's GDP. However, the survey revealed more: the historical process involving investments in sugar cane shows that this has had vivid influence on the development of Goyaz since the 18th century; one can certainly conclude that the reed has contributed much to the consolidation of agricultural vocation and state's economic growth since then.