Análise do Balanço de Energia em duas Torres Micrometeorológicas do Pampa07

Análise do balanço de energia em duas torresmicrometeorológicas do PAMPA0

Evapotranspiração de cultura e real nas culturas de soja e trigo no sul do Brasil.

A evapotranspiração da cultura (ETc) representa a máxima perda de água que certa cultura sofre em dado estádio de desenvolvimento quando não há restrição de água no solo

Influencia do Sistema Frontal na Poluição do Ar

Neste estudo verifica-se a influencia da passagem de um sistemafrontal nos máximos de concentração preditos por um modelo tipo plumagaussiana. Dados meteorológicos obtidos de modo continuo, a cada segundo,são usados como entrada para o modelo ISCST. Resultados mostramque os máximos preditos, em intensidade e localização, estão intimamenterelacionados com as variações de temperatura, velocidade e direçãodo vento associados a passagem do sistema

The fallow period plays an important role in annual CH4 emission in a rice paddy in southern Brazil.

Paddy fields are significant anthropogenic sources of methane (CH4) emissions. In southern Brazil, rice is grown in lowland flooded areas once a year, followed by a long fallow period. This study aimed to measure CH4 fluxes in a rice paddy field in southern Brazil during the rice-growing season of 2015/2016 and the following fallow period. The fluxes were estimated using the eddy covariance (EC) technique and soil chamber (SC). Diurnal and seasonal variations of CH4 fluxes and potential meteorological drivers were analyzed. The CH4 fluxes showed distinct diurnal variations in each analyzed subperiod (vegetative, reproductive, pre-harvest, no rice, and land preparation), characterized by a single-peak diurnal pattern. The variables that most influenced methane emissions were air and surface temperatures. In the growing season, the rice vegetative stage was responsible for most of the measured emissions. The accumulated annual emission estimated was 44.88 g CH4 m?2 y?1, being 64% (28.50 g CH4 m?2) due to the rice-growing season and 36% (16.38 g CH4 m?2) due to the fallow period. These results show the importance of including fallow periods in strategies to mitigate methane emissions in flood irrigated rice-growing areas

Análise do Fluxo de CO2 e Indice de Área Foliar para uma Cultura do Milho

Análise do fluxo de CO2 e índice de área foliar para umacultura do milh

Dynamical model of ball juggling Delta robots using reflection laws

In this paper, the dynamical model of the ball juggling robot is presented. The dynamical model takes advantage of the fact that instead of using the camera or vision system, this dynamical model can be used to continuously calculate ball velocity and position during juggling or playing between two robots. In ball juggling or playing robot experiments the most difficult task is to get the position and velocity of the ball during play. This paper deals with calculating the position and velocity of the ball continuously during juggling or playing with the rigid racket. Basic physics reflection laws are used to calculate the outgoing velocity of the ball after each hit. The hitting of the ball on the racket is detected by measuring the distance between the ball contact point and the rigid racket surface. To get the velocity and position of the ball throughout the juggling, the gravitational effect is also incorporated. An overall structure of the stand alone model is also proposed to get the position and velocity continuously. This model is computationally less expensive and gives better insight of the juggling. To validate this dynamical model, experiments are performed on the test bench. The results of this dynamical model are compared and analysed with the results obtained from the RecurDyn simulation and test bench experiment