Load Measurements of an Anchored Retaining Wall

Thirty six anchors, corresponding approximately to five per cent of the total anchors of a retaining wall, were instrumented using electrical load cells, aiming to study the variation of the applied load with time associated with the sequencing of construction. It was observed that the average total loss was 25% of the average applied load, which consisted of three major component: rapid loss; long term loss and loss due to adjacent anchors loading

Virial coefficients from 2+1 dimensional QED effective actions at finite temperature and density

From spinor and scalar 2+1 dimensional QED effective actions at finite temperature and density in a constant magnetic field background, we calculate the corresponding virial coefficients for particles in the lowest Landau level. These coefficients depend on a parameter theta related to the time-component of the gauge field, which plays an essential role for large gauge invariance. The variation of the parameter theta might lead to an interpolation between fermionic and bosonic virial coefficients, although these coefficients are singular for theta=pi/2.Comment: 10 Latex pages, no figures. Version to appear in MPL

Evaluation of reforestation using remote sensing techniques

The utilization of remotely sensed orbital data for forestry inventory. The study area (approximately 491,100 ha) encompasses the municipalities of Ribeirao Preto, Altinopolis, Cravinhos, Serra Azul, Luis Antonio, Sao Simao, Sant Rita do Passa Quatro and Santa Rosa do Viterbo (Sao Paulo State). Materials used were LANDSAT data from channels 5 and 7 (scale 1:250,000) and CCT's. Visual interpretation of the imagery showed that for 1977 a total of 37,766.00 ha and for 1979 38,003.75 ha were reforested with Pinus and Eucalyptus within the area under study. The results obtained show that LANDSAT data can be used efficiently in forestry inventory studies

Remote sensing in forestry: Application to the Amazon region

The utilization of satellite remote sensing in forestry is reviewed with emphasis on studies performed for the Brazilian Amazon Region. Timber identification, deforestation, and pasture degradation after deforestation are discussed

Vírus da murcha do abacaxi.

As murchas em abacaxizeiro podem ser causadas principalmente por encharcamento, deficiência hídrica, fungos e vírus. Aqui será abordada a murcha causada por vírus. O vírus da murcha do abacaxi causa prejuízos de dois modos: levando a planta à morte, antes mesmo da frutificação, ou impedindo a frutificação normal pelo elevado número de frutos refugos. Os primeiros sintomas desta murcha são constatados no sistema radicular, que apresenta crescimento prejudicado. Os sintomas foliares aparecem dois a três meses após o início da infecção pelo vírus. Na cultivar Smooth Cayenne descreveu-se os seguintes sintomas: aparecimento de coloração vermelho-bronzeada e amarelada nas folhas centrais; suas margens tendem a se curvar para baixo, perdem a turgescência e suas pontas ficam secas; as plantas infectadas apresentam menor porte do que as sadias. Em alguns períodos do ciclo da cultura, algumas plantas infectadas podem não apresentar sintomas. O avermelhamento das folhas também pode ser devido à presença de nematóides na área ou por causa de deficiência de cobre.bitstream/item/25863/1/TodafrutaID27258abacaxi.pdfDisponível em: Acesso em: 24 jan. 2011

Plantio direto de feijão Phaseolus sobre a palhada da leguminosa Guandu na agricultura familiar da Transamazônica.

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