Desempenho de trator agrícola em operação de preparo do solo utilizando diesel e proporções de biodiesel de babaçu

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Biodiesel etílico de babaçu x diesel B S1800: ensaio de opacidade da fumaça do trator agrícola variando os horários do dia

Pós-graduação em Agronomia (Ciência do Solo) - FCAV

Desenvolvimento de conexões hidráulicas: aplicação em sistemas de basculamento de cabines de caminhões no mercado brasileiro

The main goal of this thesis is to describe in details the development and manufacturing of hydraulic fittings for application in truck's cabin tilting lines, covering all of the pre-project, drawing, quotation and supplying processes. This development was planned due to Eaton Corporation - Hydraulics Group's interest in competing on this market with this kind of application. Company's standard procedures were executed until the final supplying stage could be reached. Moreover, the year in which this project was conducted was ruled by a crisis in the automotive segment and new opportunities had to be pursued and developed. Eaton's USA, India and China (facilities located in Aurora, Pune and Shanghai, respectively) engineering team offered all the support in order for this project to come true. As a result there are new part numbers in the company's portfolio, which now offers new fittings and a new type of adapter that was unknown prior to the project. This way Eaton has conquered even more space with this cabin tilting application and the customers (OEMs) have an alternative and homologated supplier to purchase from. Financially speaking, the project's sales income may vary from US$800,000.00 to US$1,300,000.00 worth during the following supplying years

Arremessadas da turma de caminhão: literatura e experiência traumática entre as trabalhadoras boias-frias na obra de Murilo Carvalho

This article investigates the universe of women seasonal farm workers, more precisely those women laborers who take the so-called truck, in the newspaper chronicle “Th e Seasonal Farm Workers’ Express” (1976) and the short story “Th e funny face of fear”(1978), both by the journalist and creative writer Murilo Carvalho. Th e hypothesis is that these two narratives, in which the theme is the truck accident, can be classifi ed as testimonial literature.

Alterations to oxidative stress markers in dogs after a short-term stress during transport

While methods to evaluate antioxidant capacity in animals exist, one problem with the models is induction of oxidative stress. It is necessary to promote a great enough challenge to induce measurable alterations to oxidative parameters while ensuring the protocol is compatible with animal welfare. The aim of the present study was to evaluate caged transport as a viable short-term stress that would significantly affect oxidative parameters. Twenty adult Beagle dogs, maintained on the same diet for 60 d prior to the transport, were included in the study. To simulate the stress, the dogs were housed in pairs in transport cages (1·0 m × 1·0 m × 1·5 m), placed on a truck coupled to a trailer and transported for a period of 15 min. Blood collection was performed immediately before and again 3 h after the transportation to evaluate oxidative parameters in blood serum, including thiobarbituric acid reactive substances (TBARS), total antioxidant capacity (TAC), sequestration activity of the radical 2,2-diphenyl-1-picryl-hydrazyl (DPPH•), protein carbonylation (PC), total sulfhydryl groups (SH), alpha-tocopherol (αToc) and retinol (Ret). PC, SH and αToc were not significantly changed in the study; however, TBARS, TAC and DPPH increased, whereas Ret decreased after the transport. Although the lack of a control group of dogs not submitted to transport is a limitation to be considered, we conclude that the transport model is effective in inducing an antioxidant response in dogs and relevant blood parameters show sensitivity to this proposed model.

Vibração incidente sobre o corpo inteiro do operador de trator agrícola ensaiado em pista de vibração com diferentes lastros, velocidades e pressões de inflação dos pneus

Pós-graduação em Agronomia (Energia na Agricultura) - FCA

Tractor perfomance as a function of speed and seeder s tire inflation pressure

O desempenho de tratores agrícolas em condições de campo resulta da interação entre pneu e rodado, influenciado pela velocidade de deslocamento. O objetivo deste trabalho foi avaliar o desempenho de um trator agrícola sob diferentes pressões de inflação dos pneus da semeadora (518, 483, and 414kPa) e em duas marchas que proporcionaram velocidades de 3,0 e 6,0km h-1. O experimento foi realizado no campus de Jaboticabal da Universidade Estadual Paulista (UNESP). O delineamento experimental utilizado foi fatorial inteiramente casualizado (3x2), com quatro repetições. A força de tração foi influenciada pela marcha e pela potência exigida; no entanto, a pressão de inflação do pneu da semeadora não alterou esses parâmetros. Além disso, o consumo de combustível foi influenciado apenas pela marcha do trator. O consumo de energia foi maior com o aumento da velocidade, ocasionada pela mudança de marcha. A velocidade de deslocamento foi maior para a pressão de 518kPa, em razão da menor patinagem da semeadora promovida por essa pressão. A patinagem do trator não foi alterada pelos fatores testados.

Impacto do estresse no bem-estar dos animais e na qualidade da carcaça e da carne

Pós-graduação em Zootecnia - FCAV

Construção e calibração de um inclinômetro para uso em tratores agrícolas como instrumento de segurança

The tractors are the main potency source, for the traction of tillage equipments and their use are increasing more and more in Brazilian agriculture. In spite of the great technological progress the increase of the number of agricultural tractors brought positive aspects and some negative, among these last ones it stands out the appearance of a new source of work accidents, which importance is given by the physical damages caused to the operator. Therefore the objective of this work was to project and develop an inclinometer, which indicates the inclination of the land, as safety sensor for agricultural tractors to avoid lateral hollovers, through a resonant sign, for the operator and the machine preservation. The built and evaluated inclinometer showed to be efficient for inclination indication of different areas during field operations with agricultural tractors, small angle oscillation and enough answer time to help operators to take decisions in imminence situation of lateral machine hollovers.

Projeto ergonômico de assento para tratores, utilizando-se dos recursos da computação gráfica

Regardless its power rate, the tractors are the most used source in operations of tillage. Thus, due to the expansion of cultivated areas and the need of striking application of technologies to meet the advance of agribusiness, it has been shown that these machines are concentrated during the work periods, the physical and mechanical actions to perform the activity. So, it's possible to realize that the time of physical exposures and the operational decision-making are related with the job station comfort. In regard to what was mentioned, this paper's main objective is to design an ergonomically viable seat to furnish the operational requirements of the tractor driver, using the new CAD / CAE technologies in order to provide optimal comfort to the relationship between human being and machines.

Conformidade ergonômica dos controles no posto de trabalho do operador de trator: estudo de caso NH 7630

This article discusses an ergonomic analysis of the controls used by tractor operators, covering their positions in relation to the casing of your job. Was performed an assessment of the controls of the job of a model NH 7630 tractor average power of 74 kW (100 CV), using the norms of the ABNT. With this screening could detect the positive and negative. Then was accomplished an analytical study of the controls. Evaluation results show that some controls of tractors have errors evaluated in relation to NBR/ ISO 6682.

Comparativo ergonômico de duas metododologias para aquisição de coordenadas tridimensionais do posto de trabalho do operador de trato

This research aimed to the comparison between two methods for obtaining three-dimensional coordinates of the controls of the upper limbs of the job of the tractor operator. The methods used were based on NBR / NM / ISO 5353 - Road machines, tractors and agricultural and forestry machinery – Reference point of the seat. The first method used follows the principles recommended by the standard NBR/NM/ISO/5353 The second method is an adaptation of this standard with the introduction of a laser measuring equipment developed by Silva (2009). The results were compared statistically to evaluate differences between the methodological processes involved. In this research, data was collected thought a brand new tractor Massey Ferguson model MF 292, awarded by the dealership from Londrina. The results have shown a considerable variation between the traditional measurement process and the laser measuring. It must be considered that this variation can be used to calibrate the tractor controls positioning, therefore the tractor is not in accordance to ABNT.

O circuito espacial produtivo dos fertilizantes no território brasileiro

This paper has two main objective the study of the productive space circuit of fertilizers in Brazil. For this, we study the company's operations Vale Fertilizers SA More specifically, the production and consumption of fertilizers in Brazil. In the current globalization the Brazilian countryside know new ways of doing (SANTOS, 1994). This, with less roughness, adopts the Green Revolution package, and introduces inputs to the soil, such as seeders, combines, tractors, herbicides, fungicides and fertilizers (Santos & Silveira, 2001). The examination of the Brazilian case as the agricultural modernization reveals the great vulnerability of modern agricultural regions in the face of globalizing modernization (Santos, 2000: 92). The places that receive capital reproduction of imperatives gain a new medium, is the formation of informational scientific technical means, are the bright spots corresponding to other places (Santos, 1994). Thus, the productive circuits are no longer confined to the environment, but establish connections with distant places (Santos, 1986; Frederick & CASTILLO, 2004). What's more, the policy is now made in the market (Santos, 2000, p.67) and the adoption by the Brazilian government's neoliberal policies, the Brazilian state-owned companies related to fertilizer production circuit are privatized, thereby Brazil makes It is further more dependent on inputs used in the field, including fertilizers

Consumo de combustível de um trator agrícola em função do tipo de soloe da pressão de inflação nos pneus utilizando o equipamento canteirador

Agricultural mechanization improved the efficiency of field operations by providing an increase in crop production. The intensified mechanization, however, has led to higher energy use mainly in the area of fuel consumption. The objective of this study was to compare the fuel consumption of tractors using two different tire pressures for two different types of soil during tillage with irrigated cotton in semi-arid regions. These tests were performed at the Maricopa Agricultural Center (MAC), an experimental farm belonging to The University of Arizona with a Case 4x2 TDA 88kW equipped with an autopilot system. The results showed lower fuel consumption using a tire pressure of 124 kPa on sandy clay loan soil.

Consumo de combustível de um trator agrícola no preparo do solo para a cultura do algodão irrigado em função da pressão de inflação nos pneus

Currently, the efficiency in field operations and the increased productivity of crops is only possible with the use of agricultural machinery and equipment. This intensification of mechanized activities in agriculture, however, led to higher energy costs on farms mainly in the fuel consumption of agricultural tractors. The objective was to compare the fuel consumption of a tractor on tillage operations for irrigated cotton in semi-arid region varying two tire inflation pressures. The tests were conducted in Maricopa Agricultural Center (MAC), an experimental farm belonging to The University of Arizona using a 4x2 TDA Case tractor equipped with a 88kw autopilot system. The results showed lower values in the hourly fuel consumption by using the minimum tire inflation pressure of 124 kPa for all tillage equipment used.