The Spitzer Microlensing Program As A Probe For Globular Cluster Planets: Analysis Of Ogle-2015-BLG-0448

The microlensing event OGLE-2015-BLG-0448 was observed by Spitzer and lay within the tidal radius of the globular cluster NGC 6558. The event had moderate magnification and was intensively observed, hence it had the potential to probe the distribution of planets in globular clusters. We measure the proper motion of NGC 6558 (${{\boldsymbol{\mu }}}_{\mathrm{cl}}(N,E)=(+0.36\pm 0.10,+1.42\pm 0.10)\;{\rm{mas}}\;{{\rm{yr}}}^{-1}$) as well as the source and show that the lens is not a cluster member. Even though this particular event does not probe the distribution of planets in globular clusters, other potential cluster lens events can be verified using our methodology. Additionally, we find that microlens parallax measured using Optical Gravitational Lens Experiment (OGLE) photometry is consistent with the value found based on the light curve displacement between the Earth and Spitzer

Previsão da perda de solo na Fazenda Canchim - SP (EMBRAPA) utilizando geoprocessamento e o USLE 2D Loss of soil determination in Fazenda Canchim - SP (EMBRAPA) using geographic information systems and USLE 2D

Os modelos hidrossedimentológicos têm enorme potencial no Brasil para ser a melhor ferramenta de estimativa de perda de solo, devido principalmente a sua complexidade na descrição dos processos e sua robustez que os fundamenta. Entretanto, devido à necessidade de uma quantidade muito grande de informações requerida, aliada a dificuldades de adaptações desses modelos internacionais e necessidade de tempo e estrutura para criação de modelos nacionais, a Equação Universal de Perda de Solo (EUPS) e suas variações ainda são uma referência no Brasil para determinação de perda de solo. Neste trabalho, utilizou-se um atual modelo de cálculo do fator LS, o Software USLE 2D, em conjunto com o IDRISI. A aplicação foi feita na Fazenda Canchim da Embrapa Pecuária Sudeste; consistindo o primeiro trabalho desta natureza realizado nessa área com tais ferramentas. Os resultados obtidos mostraram-se coerentes com os tipos de solo, as declividades e a cobertura vegetal da área de estudo.<br>The hydrosedimentological models have an enormous potential in Brazil to be the best tool for the estimative of soil lost principally due to their complexity on description of the processes and the robustness that validate them. However, due to a need of a very big volume of required information in connection with the difficulties to adapt the international models and the need of time and structure to create national models, the Universal Soil Lost Equation (USLE) and its variations still are a reference in Brazil to soil lost determination. In this article, a new model to calculate the SL factor, the USLE 2D Software combined with the IDRISI were used. The inedited application was done in Southeast Cattle Breeding Embrapa's Canchim Farm, consisting on the first work of this nature done in this area with such tools. The results obtained were coherent to types of soil, slopes and vegetal cover in the area of study