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Search Results: 1 - 10 of 728 matches for " Eder Dornelles; "
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Características ergon?micas dos tratores agrícolas utilizados na regi?o central do Rio Grande do Sul
Debiasi, Henrique;Schlosser, José Fernando;Pinheiro, Eder Dornelles;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000600021
Abstract: it is possible to reduce the probability of work accidents, diseases occurrence and increase the work efficiency using agricultural tractors with good ergonomic conditions. the objective of this research was to verify the presence of ergonomic items in used agricultural tractors and also to evaluate the influence of tractor age in these characteristics. 175 agricultural tractors belonging to 3 regions of rio grande do sul state (santa maria, restinga seca and cachoeira do sul, brazil), present in 114 farms randomly sampled, were evaluated. the results showed that only 3% of sampled specimens were equipped with a cab, and most part of the tractors did not have protection against the heat produced by tractor transmission and engine. with regard to ergonomics of commands, more than 70% of the tractors had gear levers positioned in its longitudinal central line, and only 8% were equipped with adjustable steering wheel. in the same way, more than 20% of sampled specimens did not have upholstered seat. besides, the presence of the evaluated items were smaller for older tractors.
Características ergon micas dos tratores agrícolas utilizados na regi o central do Rio Grande do Sul
Debiasi Henrique,Schlosser José Fernando,Pinheiro Eder Dornelles
Ciência Rural , 2004,
Abstract: A utiliza o de tratores agrícolas com boas condi es ergon micas reduz a probabilidade de ocorrência de acidentes e doen as ocupacionais, aumentando a eficiência dos trabalhadores. Neste trabalho, objetivou-se verificar a presen a de itens relacionados à ergonomia de tratores agrícolas usados, bem como avaliar o comportamento destas características em fun o do tempo de uso das referidas máquinas. Foram analisados 175 tratores agrícolas pertencentes às microrregi es gaúchas de Santa Maria, Restinga Seca e Cachoeira do Sul, presentes em 114 propriedades aleatoriamente amostradas. Os resultados mostraram que apenas 3% dos espécimes avaliados eram equipados com cabina, sendo que a maior parte dos mesmos n o apresentava isolamento do calor gerado pelo motor e transmiss o. Com rela o à ergonomia dos comandos, mais de 70% dos tratores tinham alavancas de cambio centrais, enquanto que apenas 8% eram equipados com volante de dire o regulável. Da mesma forma, mais de 20% dos exemplares amostrados possuíam bancos sem estofamento. Além disso, a presen a dos itens avaliados foi menor para os tratores mais antigos.
Correla??es entre atributos químicos do solo e atributos da cultura e da produtividade de arroz irrigado determinadas com técnicas de manejo localizado
Durigon, Reges;Schlosser, José Fernando;Russini, Alexandre;Dornelles, Mar?al Elizandro de Carvalho;Pinheiro, Eder Dornelles;
Ciência Rural , 2009, DOI: 10.1590/S0103-84782009005000206
Abstract: the traditional agricultural system disregards spatial variability of the attributes of soil used in crop production, while the site-specific management aims to identify and to propose a management of this variability. an experiment of 70ha was conducted with the purpose of determining the correlation between soil attributes, of crop and flooded rice yield through site-specific management techniques. it was collected one sample per hectare, and the soil analysis results were used to elaborate the map of its chemical attributes. the sampling to determne the grain yield was made in a grid with one point per hectare and four plant sub-samples per point georreferenced were hand plucked. the spatial variability and the correlations between soil attribute maps and flooded rice yield were done using the campeiro software 6.0. the highest positive correlations between them were verified for calcium and magnesium, while aluminium saturation presented the highest negative correlation.
Uniformidade de picado processado por colhedora de forragem
Schlosser, José F;Dornelles, Mar?al E;Pinheiro, Eder D;Durigon, Reges;Russini, Alexandre;
Engenharia Agrícola , 2010, DOI: 10.1590/S0100-69162010000200012
Abstract: the process of plants ensilage is a common practice in brazil which provides the housing of animal feeds with high level of energy through plants to use in periods of shortage. to obtain silage with good quality it is needed a uniformity during the harvesting of plants by forage harvesters. therefore, this research aimed to evaluate the uniformity of pricked corn and sorghum harvested by forage harvester, by assessing the methodology proposed to determine the sizes of the plant particles and to define the best adjustment for using the harvester. it was evaluated two adjustments for size cutting, 4 and 22 mm, on corn and sorghum harvesting. the adjustment of 4 mm showed a larger uniformity of pricked than the adjustment of 22 mm, medium values of 63.2% and 44.6%, respectively, in the recommended range. thereby, the adjustment to 4 mm should be used to corn and sorghum ensilage with the evaluated harvester. the method used for determining the pricked uniformity allowed the evaluation with fastness, efficiency and simplicity.
Avalia??o técnica de uma máquina para a corre??o de microrrelevo do solo de áreas destinadas ao cultivo de arroz irrigado
Alon?o, Airton dos Santos;Marini, Vinicius Kaster;Massoco, Daniel Biazus;Pinheiro, Eder Dornelles;
Ciência Rural , 2006, DOI: 10.1590/S0103-84782006000500049
Abstract: testing an agricultural machine, is fundamentally the gathering of information with the purpose of taking a decision. it is widely accepted that technological inventions from implicit knowledge in modern agricultural machinery created many benefits to manufacturers, farmers and society in general. with this aim, the prototype of a soil micro-relief correction machine was evaluated, in order to assess its real ability on performing the intended design function. two treatments were made, in this ware with four passages each. in those plots, land bumpiness was examined before and after the equipment usage. according to the measurements, the test results were considered inadequate for the original machine purpose. from those, suggestions were given to the manufacturer in order to contribute for improvements in machine specifications or even for a newly redesigned, better equipment, taking in mind the need of compliance with operational and safety specifications to really assure its quality.
índice de mecaniza??o de propriedades orizícolas no Rio Grande do Sul, Brasil
Schlosser, José Fernando;Machado, Otávio Dias da Costa;Debiasi, Henrique;Pinheiro, Eder Dornelles;
Ciência Rural , 2004, DOI: 10.1590/S0103-84782004000300021
Abstract: characterized as activity of high economic expression in rio grande do sul, the rice production is practiced in an intense way, above all in the applied mechanization. tends as objective to diagnose the mechanization level (kw/ha), in function of the agricultural area used with rice (aarr) and of the total agricultural area (aagt), a sample of 87 properties, that its amoung their activities develop the rice production, was analyzed. for the representation of the scale of the properties in the studied index, they were applied 8 strata in function of the area agricultural total of the same ones, being considered for the available potency the agricultural tractors in activity and the declared productive areas. the differentiated participation of the area of cultivation of rice in the different strata carted in expressive differences of the mechanization index, when analyzed the area of rice and the total agricultural area. the bedding was shown efficient in the determination of the variation of the mechanization index along the studied strata, just happening significant difference between the strata 3 (31 a 45 ha) and 4 (46 a 90 ha) and the strata 6 (131 a 180 ha) and 7 (181 a 400 ha), when related the index studied to the area of rice, being represented by intervals of class indeed differentiated for the other averages.
Aplica??o de fertilizantes a taxa variável em agricultura de precis?o variando a velocidade de deslocamento
Werner, Valmir;Schlosser, José F.;Rozin, Dinorvan;Pinheiro, Eder D.;Dornelles, Mar?al E. C.;
Revista Brasileira de Engenharia Agrícola e Ambiental , 2007, DOI: 10.1590/S1415-43662007000600016
Abstract: the main purpose of this work was to evaluate the performance of a set formed by an agricultural tractor equipped for precision farming and a broadcaster spreader not adapted for applications of fertilizers at variable rates. the variations of the rates of fertilizer application were controlled by varying the travel speed. the width, uniformity of traverse and longitudinal distribution and the variation of the applied rate of npk fertilizer were determined. the study was accomplished in a commercial farming of soybeans in the city of santa rosa, rs. for better reliability of the tests, a soil condition and farming relief that would represent a real situation of use of the mechanized set were looked for. the results showed that, in the study situation and with the used fertilizer, it is possible to use the set for widths between 20.5 and 22.5 m in the continuous application circuit and back-and-forth, with variation coefficient below 15%. in the analysis of the longitudinal profile of distribution, the values of variation coefficients between 8.78 and 12.48% were obtained. the mechanized set allows composing several application rates varying the travel speed in the system of precision farming.
índice de mecaniza o de propriedades orizícolas no Rio Grande do Sul, Brasil
Schlosser José Fernando,Machado Otávio Dias da Costa,Debiasi Henrique,Pinheiro Eder Dornelles
Ciência Rural , 2004,
Abstract: Caracterizada como atividade de alta express o econ mica no Rio Grande do Sul, a orizicultura é praticada de forma intensa, sobretudo na aplica o da mecaniza o. Tendo como objetivo diagnosticar o nível de mecaniza o (kW/ha), em fun o da área agrícola utilizada com arroz (AARR) e da área agrícola total (AAGT), foi analisada uma amostra de 87 propriedades, que, dentre suas atividades, desenvolvem a orizicultura. Para a representa o da escala das propriedades no índice estudado, foram aplicados oito estratos em fun o da área agrícola total das mesmas, sendo considerada a potência dos tratores agrícolas em atividade e as áreas produtivas declaradas. A participa o diferenciada da área de cultivo de arroz nos diferentes estratos acarretou diferen as expressivas no índice de mecaniza o, quando analisadas a área de arroz e a área agrícola total. A estratifica o mostrou-se eficiente na determina o da varia o do índice de mecaniza o nos estratos estudados, ocorrendo diferen a significativa apenas entre os estratos 3 (31 a 45 ha) e 4 (46 a 90 ha) e os estratos 6 (131 a 180 ha) e 7 (181 a 400 ha), quando relacionado o índice estudado à área orizícola, sendo representados por intervalos de classe eficientemente diferenciados para as demais médias.
Avalia o técnica de uma máquina para a corre o de microrrelevo do solo de áreas destinadas ao cultivo de arroz irrigado
Alon?o Airton dos Santos,Marini Vinicius Kaster,Massoco Daniel Biazus,Pinheiro Eder Dornelles
Ciência Rural , 2006,
Abstract: Testar e ensaiar máquinas agrícolas consiste, fundamentalmente, em obter informa es visando a uma tomada de decis o. é amplamente aceito o fato de que as inven es tecnológicas resultantes de conhecimento implícito na maquinaria agrícola moderna geraram muitos benefícios a fabricantes, agricultores e à sociedade em geral. Com esse objetivo foi avaliado o protótipo de uma máquina para corre o do microrrelevo do solo, para verificar sua real capacidade para executar a referida fun o. O trabalho constou de dois tratamentos e quatro repeti es, no qual foi registrada a rugosidade do terreno antes e após a passagem do equipamento. Os resultados obtidos foram considerados inadequados em rela o à fun o original da máquina. A partir desses resultados, foram dadas sugest es ao fabricante, de modo a fornecer subsídios à adapta o da máquina ou mesmo ao seu redesenho, tendo em vista o atendimento às especifica es operacionais e de seguran a, necessárias para garantir sua qualidade.
Antropologia e Internet: quando o "campo" é a cidade e o computador é a "rede"
Dornelles, Jonatas;
Horizontes Antropológicos , 2004, DOI: 10.1590/S0104-71832004000100011
Abstract: article that presents a reflection about the narrow association that now is processed between computer/internet and social conducts. one of the clearest aspects is related to the cultivation of a sociability type that we can denominate as being "virtual". that concept appears of the encounter certain characteristics. on a side we have the presence of sociability practices to the "classic" way, being maintained by the encounter face to face. of other, it is present the especific generated by such technology: the presence of the graphic interface as mediator of the social encounter.
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