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De Andrade N.S.F.,Instituto Federal do Triangulo Mineiro IFTM | Filho M.V.M.,Sao Paulo State University | Torres J.L.R.,Producao Vegetal do IFTM | Pereira G.T.,Sao Paulo State University | Marques Junior J.,Sao Paulo State University
Engenharia Agricola

The general objective was to show the economic and technical impact in soil and nutrient loss through erosion in the cultivation of sugar cane. It was specifically to evaluate the nutrient loss through erosion (P, K, Ca and Mg), the cost of replacing the nutrients and the production of sugar cane in two harvesting systems (raw and burned sugar cane) in Catanduva, state of São Paulo, Brazil. An area of 100 ha was studied for each system, formed and harvested in the same period (2002 and 2007), with similarities in the type of soil, variety, topography, and the number of cuts. The methodology was based on the universal equation of soil loss and the theory of production costs and the replacement of nutrients. The greatest loss of soil nutrients and erosion occurred in the areas of the burned sugar cane; the burned sugar cane (cut by hand), the average of five cuts, losses 48.82% per hectare of land, 56.45% of potassium (K) and 60.78% of phosphorus (P) than the raw sugarcane (mechanical harvesting), the replacement cost of nutrients, on average, by the burned cane (R$ 33.92 ha-1 year-1) was higher that the raw sugarcane (R$ 21.12 ha-1 year-1), the raw sugar cane had lower production cost (R$ 29.60 Mg-1) compared to the burned sugar cane (R$ 32.71 Mg-1); the raw sugar cane had a higher average return (R$ 5.70 Mg-1year-1) with respect to the burned sugar cane (R$ 2.59 Mg-1). Source

Vieira D.M.S.,Instituto Federal do Triangulo Mineiro IFTM | Torres J.L.R.,Federal Rural University of Rio de Janeiro | Barreto A.C.,IFTM campus Uberaba MG | Cunha E.A.,IFTM campus Uberaba MG

The morphometry of a watershed is one of the procedures from hydrological or environmental analysis, which can reveal specific physical indicators to a particular location in order to qualify environmental changes and subsidize the determination of the natural aptitude of each unit. This study aimed to analyze the basins morphometric parameters of the environmental protection area of Uberaba River to support decisions on appropriate use of these areas. Autocad and Excel were used to perform the morphometric analysis in the areas, which were made on the IBGE topographic map (Uberaba Sheet) 1:100.000 scale. It was concluded that the streams drainage network Alegria and Limo were considered 2° order, Inhame and Mutum 3°, Ribeirão da Vida 4°. They all have a dendritic pattern and are poorly ramified. The coefficients of compactness, roundness index, and form factor calculated indicated that all watersheds under study are elongated and have a low risk of flooding. The drainage basins density was high and confirmed the erosion areas occurrence susceptibility. The roughness coefficient calculated for the watersheds of the streams Alegria and Ribeirão da Vida indicated that these areas had appropriate use for agriculture, Limo and Mutum for livestock, and Inhame for forest. Source

Rocha J.M.,Instituto Federal do Triangulo Mineiro IFTM | Honorato M.J.,Federal University of Sao Paulo | Costa E.,Federal University of Uberlandia
IEEE Latin America Transactions

Expert panels are groups of people who work together to perform a given task, make diagnostics, or reach a decision. A good example of an expert panel is a software development team. The Condorcet-List theorem states that under certain conditions the proposals of a group may be more reliable than those taken by a single expert. In order to estimate the probability of an individual arriving at the correct choice, the authors of the present work use the Rasch model, as is usual in assessments. Besides evaluating individuals, the present paper uses the Rasch model to assess software development teams. To evaluate a team, it is proposed that each member of the group is able to give educated advice in each subtask of the problem. This is necessary, since the Condorcet-List theorem requires that decisions be taken by a majority vote, and that each voter has a probability greater than 0.5 of giving a correct feedback to his/her co-workers. © 2016 IEEE. Source

Torres J.L.R.,Instituto Federal do Triangulo Mineiro IFTM | De Silva M.G.S.,Brazilian National Council for Scientific and Technological Development | Cunha M.A.,Brazilian National Council for Scientific and Technological Development | Valle D.X.P.,Brazilian National Council for Scientific and Technological Development | Pereira M.G.,Federal Rural University of Rio de Janeiro
Revista Caatinga

The plant species used as ground cover preceding the commercial crops cultivation in the Cer-rado must be adapted to the climate and soil of the region, so they have high biomass productivity and offset the decomposition high rates that occurs in these regions. This study aimed to evaluate the biomass yield and the decomposition rate of residues of different cover crops preceding soybean cultivation in Uberaba-MG, Brazil. The experiment was conducted in 2011/12 period in a randomized complete block design in plots with 2 m2 with treatments comprise the following covers: jack bean, millet, sunn hemp and brachiaria. It was evaluated: the dry biomass yield, the decomposition rate through of the bags decomposition, productivity, number of beans per plant, and mass of 100 soybean grains. The millet was the plant cover that showed the highest yield of dry biomass (5.22 Mg ha-1) during the study period. The decomposition of crop residues occurred at accelerated rate until to complete 120 days and after that the rate slowly up until 240 days. Sunn hemp and jack bean were the cover crops with the decomposition highest rates and the smaller half-lives were observed; soybean yield was not affected by the soil covers. © 2014, Universidade Federal Rural do Semi-Arid. All rights reserved. Source

Malagoli J.A.,Federal University of Uberlandia | Camacho J.R.,Federal University of Uberlandia | Ferreira Da Luz M.V.,Federal University of Santa Catarina | Ferreira J.H.I.,Instituto Federal do Triangulo Mineiro IFTM | Sobrinho A.M.,Federal University of Uberlandia
IEEE Latin America Transactions

In the present day, design of engineering systems appears as a line of research of great interest due the many applications that can be found in different areas of science and engineering. In this setting, design of induction motor, whose functions base are induce alternating currents in the rotor circuit, by the magnetic field rotating produced the stator coils, appears as an interesting theme research already which is directly related to manufacturing costs motors. In this context, this work aims the design of a three-phase induction motor using the Differential Evolution Algorithm. For this purpose considered minimizing loss and cost on motor by determining the geometric variables vector characterizing the model mathematical presented. To solve these problems is used the MODE algorithm (Multiobjective Optimization Differential Evolution) and the outcome is compared to the NSGA II algorithm (Non-dominated Sorting Genetic Algorithm II). © 2015 IEEE. Source

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