Thiago Rangel Rodrigues

Modeling Role Interactions in a Social Organization for the Simulation of the Social Production and Management of Urban Ecosystems: The Case of San Jerónimo Vegetable Garden of Seville, Spain

This paper presents some preliminary results obtained in the modeling of a multiagent system for the simulation of the social production and management of a urban ecosystem, in particular, the project of the San Jerónimo Vegetable Garden of city of Seville, Spain. We introduce a study regarding the interactions between agent roles in this particular social organization. For that, we use Activity Diagrams of UML, which provide a clear visualization of the communication between agent roles and allow the identification of communication protocols used by the agents. Furthermore, we show an initial proposal for the encapsulation of those protocols in Cart Ago artifacts, presenting a more modular approach for agent communication in multiagent systems.

Temporal Patterns of Energy Balance for a Brazilian Tropical Savanna under Contrasting Seasonal Conditions

The savanna of Central Brazil (locally known as cerrado) has a long history of land cover change due to human activity. These changes have led to the degradation of cerrado forests and woodlands, leading to the expansion of grass-dominated cerrados and pastures. Thus, the aim of this study was to evaluate the temporal variation in energy flux in areas of degraded, grass-dominated cerrado (locally known as campo sujo) in Central Brazil. The amount of partitioned into H declined as monthly rainfall increased and reached a level of approximately 30% during the wet season, while the amount of partitioned into increased as monthly rainfall increased and reached a level of approximately 60% during the wet season. As a result, H was significantly higher than during the dry season, resulting in a Bowen ratio (β = H/) of 3-5, while Le was higher than H during the wet season, resulting in a . These data indicate that the energy partitioning of grass-dominated cerrado is relatively more sensitive to water availability than cerrado woodlands and forests, and have important implications for local and regional energy balance.

Modeling the reflection of Photosynthetically active radiation in a monodominant floodable forest in the Pantanal of Mato Grosso State using multivariate statistics and neural networks.

The study of radiation entrance and exit dynamics and energy consumption in a system is important for understanding the environmental processes that rule the biosphere-atmosphere interactions of all ecosystems. This study provides an analysis of the interaction of energy in the form of photosynthetically active radiation (PAR) in the Pantanal, a Brazilian wetland forest, by studying the variation of PAR reflectance and its interaction with local rainfall. The study site is located in Private Reserve of Natural Heritage, Mato Grosso State, Brazil, where the vegetation is a monodominant forest of Vochysia divergens Phol. The results showed a high correlation between the reflection of visible radiation and rainfall; however, the behavior was not the same at the three heights studied. An analysis of the hourly variation of the reflected waves also showed the seasonality of these phenomena in relation to the dry and rainy seasons. A predictive model for PAR was developed with a neural network that has a hidden layer, and it showed a determination coefficient of 0.938. This model showed that the Julian day and time of measurements had an inverse association with the wind profile and a direct association with the relative humidity profile.

Geothermal Dynamics in Vochysia Divergens Forest in a Brazilian Wetland

Research involving the thermal soil dynamics of wetland areas has not yet been explored in a way that promotes a deeper understanding of the dynamics of this region. This makes it necessary for further studies to contribute to the understanding of this biome. In the present work, we studied the thermal dynamics of the soil contrasting seasonal conditions in the Vochysia Divergens Forest. The Fourier equation was used to analyze the influence of the thermal conductivity and thermal gradient on the soil heat flux. We determined how variable water content causes the system to behave differently in the four seasons, observing seasonality in soil when completely dry and when completely flooded.

Analysis of thermal conductivity in a seasonal flooded forest in the northern Pantanal

Research involving the flux of energy in the soil has been intensified in order to increase the understanding of the geophysical behavior of the Pantanal-Brazil. In present study was examined the seasonal variation of the thermal soil conductivity in the Pantanal for the study of energy flow in the soil to Pantanal region. The average values obtained by the Fourier equation showed that the soil thermal conductivity in the wet and dry seasons was 8.69 W.m-1.oC-1 and 6.65 W.m-1.oC-1 respectively. The seasonal variation of the thermal conductivity of the soil was 30.68% higher in the wet season than in the dry season due to soil moisture in the wet season. It was also noted that the seasonal variation of temperature in the soil layer was higher in the wet season than in the dry season due to a lower incidence of solar radiation in this season.

ESTIMATIVA SAZONAL DA EMISSIVIDADE ATMOSFÉRICA ATRAVÉS DA EQUAÇÃO DE BRUTSAERT NO NORTE DO PANTANAL MATO-GROSSENSE

Nos ultimos anos, tem-se intensificado as pesquisas ambientais na regiao do Pantanal a fim de se conhecer o comportamento micrometeorologico da regiao. No presente trabalho buscou-se verificar se a equacao de Brutsaert pode ser utilizada para a estimativa da emissividade atmosferica na regiao do pantanal Mato-grossense, considerando dois periodos sazonais, sendo um chuvoso e um seco, tendo como base para comparacao os dados obtidos na estacao micrometeorologica aplicados na equacao do balanco de energia, a fim de que possa contribuir para as pesquisas destinadas ao estudo das trocas de energia entre a superficie e a atmosfera da regiao pantaneira. Os resultados obtidos mostraram-se consistentes para o metodo utilizado, pois os valores estimados pela equacao de Brutsaert aproximaram-se significativamente dos valores obtidos atraves da equacao do balanco de energia que utilizou dados coletados no local para os dois periodos estudados. Palavras–chave: Equacao de Brutsaert, periodos sazonais, balanco de energia, Pantanal