Seguro rural no Brasil: análise do programa de subvenção ao Prêmio do Seguro Rural (PSR).

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Análise dos efeitos dos fatores de variação do valor bruto da produção de milho por meio do modelo.

In order to know the influence of different components of the Gross Value of Agricultural Production (GVAP) is required the decomposition of the variables. The Shift-Share method is an effective tool for this segmentation. Thereby, the main objective of this study was to analyze, by means of an adaptation in Shift-Share method, the impact of the variables: harvested area, productivity and price on the percentage change in GVAP in the corn production. Six periods were analyzed apart from (1990-1996, 1996- 2002, 2002-2008 and 2008-2013) and also the entire period (1990-2013), in the main center corn producer in Sergipe State. The study findings showed that the price was the only variable that showed negative annual growth rate, in all municipalities and in the state too. The results showed mainly that between 1990 and 2013, the GVAP increased 14% per year, resulting from changes in the variables harvested area, productivity and price, which caused effects of 2.9%, 23.7 and 12.6% respectively on the rate annual in the GVAP in the reporting period.bitstream/item/142334/1/BP101.pd

Análise da evolução da canavicultura nos Tabuleiros Costeiros de Alagoas e decomposição do valor bruto da produção (VBP) nos efeitos área produtividade e preços, por meio do modelo shift-share.

The importance of sugarcane (Saccharum officinarum) for the economy of Brazil and as an energy alternative to oil derivatives is indisputable nowadays. According to IBGE, in 2013, with a production of about 28.2 million tonnes and productivity of 63.3 tons per hectare the state of Alagoas has come to occupy a prominent position in the Northeast of Brazil. In this sense the present study aims to analyze the economic importance of sugarcane in the formation of the Gross Value of Agricultural Production (GVAP) in nine municipalities in the region of the Coastal Tablelands of Alagoas State. Shift-Share Method was used for segmentation of the effects of the harvested area, the productivity and the price paid to producers in the state of Alagoas, in four periods of six years (1990 a1996, 1996-2002, 2002-2008 and 2008 to 2013) and also in the entire period (1990-2013). In the comparison between the group of municipalities in the Coastal Plains of Alagoas and the group of the largest producers in the state, the analysis of the targeted effect of the variables on the Percentage Change In (PCI) of GVAP of sugarcane indicated negative effect of the harvested area (-0.7 % and -0.6%) and positive effects of productivity (0.9% and 0.9%) and price (2.3% and 2.4%). Therefore it is concluded that the contribution of the price was decisive for increasing the PCI of sugarcane GVPA, within the two groups of municipalities studied, between 1990 and 2013.bitstream/item/142332/1/BP103.pd

A neural qualitative approach for automatic territorial zoning.

This article presents the application of the Self-Organizing Maps (SOM) as an exploratory tool for automatic territorial zoning by combining the handle of categorical data and the other for automatic clustering. The SOM online learning algorithm had been chosen to treat categorical data by using the dot product method and the Sorense-Dice binary similarity coefficient. To automatically perform a spatial clustering, an adaptation of the automatic clustering Costa-Netto algorithm had been also proposed. The correspondence analysis had been used to examine the profiles of each homogeneous zones. To explore the approach it has been performed the territorial zoning of the Alto Taquari River Basin, Brazil, using as input data a set of thematic maps. The results indicate the applicability of the approach to perform the exploratory territorial zoning.GeoComputation 2017

Análise da evolução e dos efeitos dos fatores da variação do valor bruto da produção de mandioca, no estado de Alagoas.

In order to explain the variation of each component of the Gross Value of Production (GVP) it is necessary to decompose the grouped value. Shift-share is a method used in studies of changes in the regional economy that allows the segmentation of the factors that affect the GVP of certain product. The objective of this study was to analyze the influence of the variables harvested area, yield and price in the rate of percentage variation of the GVP of the cassava (Manihot esculenta) production, in the main producers counties, in Alagoas state, for four periods of six years (1990-1996, 1996-2002, 2002-2008 and 2008-2013) and also for the entire period (1990-2013). Results indicated that the variables price and productivity had positive effects, while harvested area demonstrated negative effect on the GVP. The study also highlighted the evolution of the variables, showing that between 1990 and 2013, the GVP had annual increases of 2,5%, 0,5% and 2,3%, while the harvested area decreased at an annual rate of 0,3%.bitstream/item/142333/1/BP102.pd

Sistemas de referência terrestre e posicionamento por satélite.

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Produtividade da água da cultura do milho obtida com câmera aérea a bordo de aeronave remotamente pilotada.

Imagens aéreas obtidas com câmera conduzida por aeronave remotamente pilotada (ARP) foram usadas na modelagem da produtividade da água com aplicação do algoritmo SAFER e do modelo da eficiência do uso da radiação de Monteith, na cultura do milho no Nordeste do Brasil. Com as bandas no visível e infravermelho próximo modelaram-se a evapotranspiração atual (ET) e produção de biomassa (BIO) sob diferentes níveis e fontes de adubação nitrogenada. Apesar da adubação com ureia em cobertura ter proporcionado menores taxas da ET, com nitrato obtiveramse maiores valores da BIO. Em termos médios, para ambas as fontes, a produtividade da água (PA), considerada como a razão da BIO para a ET, estabilizou com a dosagem de nitrogênio de 150 kg ha-1, indicando a não necessidade de maiores doses para melhoria nos valores da PA, o que pode repercutir em aspectos econômicos e ambientais relevantes para a atividade comercial na região