Mestrado em Agronegócio (EA)
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Navegando Mestrado em Agronegócio (EA) por Por Orientador "FIGUEIREDO, Reginaldo Santana"
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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 MAPEAMENTO DO ESTILO DE APRENDIZAGEM DA AGROINDÚSTRIA DE CARNE BOVINA EM GOIÁS(Universidade Federal de Goiás, 2008-03-11) RODRIGUES, Marcelio Oliveira; FIGUEIREDO, Reginaldo Santana; http://lattes.cnpq.br/1098394550647665The mapping of learning style is the measurement of the way of getting knowledge from a citizen or a group, a tool developed by Felder Silverman which is applied at the research aiming to analyze the role and the functions of meat agro industries in Goiás state. The four styles of learning developed by the tool enabled to get to the style of the segment: active, sensorial, visual and sequential. The found style shows a traditional segment with the active style marked by the facility in decision making, the sensorial because it s detailed and linked to the facts, the visual due to the privileged spaced notion and the sequential, by carring out the tasks by stage. Thus, this dissertation suggested that the meat agro industries, based on this style, shall: realize, in a systematic way, the mapping of the segment s learning style; seek for a consistent and less traditional profile for the professionals; study the importance of the comprehension of learning style, in a systematic way, for the organizational development and, understand that the profiles which differ from the analyses, aren t unreasonable or should be taken away. Actually, we should understand that everybody should be used with their own learning differences. As everybody knows, there isn t a right or wrong style, but actually, there are people in different positions that increase or decrease the capacity of learningItem Um instrumento para auxiliar o produtor na tomada de decisão quanto à data de venda da soja(Universidade Federal de Goiás, 2010-08-17) SOUZA, Regina Machado de; FIGUEIREDO, Reginaldo Santana; http://lattes.cnpq.br/1098394550647665This word aimeded to develop a friendly computational tool that, given the expectation of the producer in relation to soybean prices at a future date, help them decide whether or not it‟s worth waiting to sell their produce at that future date or sell in the current date. This work relied mainly with the System Dynamics methodology for model building and testing of Box-Jenkins to obtain the price expectations. The model also allows deriving the likely minimum price to be received by the producer in order to justify its decision to postpone its sale. We found no empirical evidence capable of sustaining the existence of a priori a better time to sell soybeans.