Variaciones del índice de cono en suelo movilizado posterior al tráfico de un tractor equipado con dos tipos de neumáticos y a cuatro velocidades de desplazamiento

The tractor is one of the machines that more traffics over the soil during the processes involving agricultural production. The interaction tractor/soil is made by the tires which, in most of the cases, are pneumatic. The tire type and the tractor travel speed, interfere directly on the pressure over the soil. One of the techniques employed to evaluate the alterations that tractor traffic causes in the soil is to measure its Cone Index. The aim of this research was to evaluate the same Cone Index alterations caused by an agricultural tractor equipped with both radial tires and bias ply tires, trafficking mobilized soil in four different travel speeds. The experiment was performed in a LATOSSOLO VERMELHO, located 22°51' S, 48°25'W and 770 m of altitude, in Botucatu-SP, Brazil. The soil mobilization was performed with a chisel plow and a disc arrow. The traction was accomplished with a John Deere tractor, model 6600, with 88 kW of power and 6,723 kg. Equipment requiring a force of 25kN was traced by the tractor draw bar. The experimental design was in randomized blocks with 4 × 2 factorial arrangements, with two distinct treatments corresponding to the types of tires (bias and radial) and the four travel speeds, with six replications. There were selected the following speeds: 3.5, 3.9, 5.1 and 5.9 km h-1. To determine the soil resistance, there was utilized MSSU - Mobile Soil Sampling Unit, with which the Cone Index was obtained in layers from 0-100, 100-200, 200-300, 300-400, 400-500 and over 500 mm deep. The Cone Index where evaluated in areas with non contact between tire and soil (ICn) and in the tire footprint track (ICp). There were calculated the Cone Index increments caused by the tractor tire (AIC) and the results showed that as the tractor travel speed increased, there were observed decrements in the medium values of cone index. The radial tire provided smaller values of the Cone Index in the superficial layer of the soil (0 to 100 mm) in relation to the bias ply tire, when the speed was approximately 6 km h-1. The increment in the Cone Index, promoted by the tractor, was more intense in the first 200 mm depth, but it also reached the layer from 200 to 300 mm.

Influencia de la separación de residuos sólidos urbanos para reciclaje en el proceso de incineración con generación de energía

This work analyses the recuperation of the energy of Municipal Solid Waste (MSW) through the incineration process. It considers the up to date tendency of segregation (separation) of plastic, paper and cardboard, glass and metals and their influence in the fluxes of mass and energy in the incineration system of MSW. For its development was used information related to the generation of MSW in Bauru city and the Combust software. The results so obtained allowed the estimation of the Caloric power of the typical MSW and also of this residue when one considers the separations of paper/cardboard and plastic for recycling.

Resíduos sólidos urbanos no Pontal do Paranapanema – SP: inovação e desafios na coleta seletiva e organização de catadores

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

O trabalho no lixo

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Lixo, conduta humana e a gestão dos insuportáveis

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Construindo arte: uma escola de artes e artesanato, o social e o ecológico

O trabalho tem como objetivo principal a criação de uma Escola de Artes e Artesanato, que está ligada ao sistema de incubadoras de cooperativas. O foco é projetar um edifício que atenda ao programa da escola e principalmente que tenha parte de sua estrutura construída de maneira artesanal e que seja sustentável. O projeto visa à formação de uma mão de obra qualificada para o mercado de artes e artesanato. Além disso, busca a reciclagem e a sustentabilidade na construção da obra e a inclusão social através dos sistemas de incubadoras de algumas universidades do Estado de São Paulo, incluindo o da Universidade na qual será inserida. A Escola será projetada dentro da Universidade de São Paulo, no Campus Butantã. Além da formação em várias áreas do campo das artes o estudante seria preparado para atuar dentro de uma economia solidária, ou seja, estudaria as formas de aplicar o que aprendeu ao longo dos cursos para poder aplicá-lo em um sistema coletivo para um ganho igualitário e de formação pessoal. Tem como idéia de público alvo agregar a sociedade acadêmica, já existente, com pessoas de diferentes classes e formações, mas com o mesmo intuito. Será a primeira escola que formará profissionais com alta especialização na área do artesanato ligada ao cooperativismo

Trabalho e saúde: o cotidiano dos catadores de lixo reciclável

The present article is an investigation / action regarding the working conditions for pickers of recyclable waste in a medium-sized city in the state of São Paulo, mainly on the health / illness process, problems related to social security and conditions of autonomy and citizenship. We use the constructs of social psychology as theoretical. The recycling of urban garbage, as the literature indicates, is not being treated as just part of the solution to environmental problems, but also has been characterized as a source of income and livelihood for many people, with no other options in life. From the interviews were semistructured, and with the method of analysis the meaning core were identified issues related to the holding of by scrap collectors, prejudice existing in relation to the activity performed, poor housing conditions, the need to social recognition and the difficulty of recyclable garbage collectors in forming a group in which they can articulate and fight for their demands. With this study, we intended to indicate suggestions for improvements in these health professionals and encourage individual and collective reflections on the condition of meetings and also through the distribution of leaflets.