Técnicas de correlação no delineamento de feições rodoviárias em imagens de baixa e média resolução

This paper presents a method for the sequential road feature delineation from digital images. It is based on a feedback loop between extrapolation and refinement steps of a given road centerline point, using in both steps correlation techniques. Firstly, a previously extracted road centerline point is linearly extrapolated, resulting in an approximate position. Secondly, this approximate position is corrected by comparing gray level profiles extracted perpendicularly to the extrapolation direction. This strategy is then repeated to allow the entire road centerline to be extracted or a stop point to be found. In order to initialize the extraction process, the operator needs to supply a starting point plus direction and width. Experimental results obtained from the application of the method to real image data are presented and discussed in this paper.

Análise dos parâmetros morfométricos da bacia do Rio Preto, Serra do Espinhaço (Minas Gerais, Brasil)

The Rio Preto Hydrographic Basin (RPHB) is located in the North-central portion of the state of Minas Gerais, Brazil, 30 km ENE of the city of Diamantina. The sources of the stream of that name are found in the Rio Preto State Park, which has an area of 10,755 hectares. The total area, perimeter, extension, and axial length of the RPHB, as well as other morphometric characteristics, with emphasis on shape indexes, were obtained with the help of the ArcGis 9.2 program. The cartographic data were taken from digitalized topographic charts in a scale of 1:100,000 of the Brazilian Geographical Institute (IBGE). The measured drainage area is of 389.3 km2 and the perimeter is 136.9 km. Due to structural influence, the shape of the RPHB is irrgular and elongated, with drainage developed in a dendritic and parallel pattern. Those characteristics were checked by means of the compaxity coefficient and the shape factor. The first one was estimated in 1.94, what implies that the basin is not subject to fast flooding in years with normal precipitation. The high degree of fluvial downcutting of the basin is confirmed by the fact that it is a 5th order basin, it presents a significant branching rate and a medium drainage density.

Tributação, seguridade e coesão social no Brasil

Incluye Bibliografía

Paleosuperfícies e perfis bauxíticos no Planalto de Poços de Caldas, São Paulo/Minas Gerais, Brasil

This work has the objective of correlating altitude with the bauxite profiles in the Poços de Caldas Plateau in order to identify paleosurfaces. Then, bauxite profiles found in the Plateau have been classified and mapped through DEM. Three different types of bauxite profiles are highlighted in the area: (1) Rim Profiles which are well-developed and thick and are located in the areas of highest altitude in the Plateau; (2) Plateau Profiles which are not very thick and very clayey, normally appear in the lower portion of the landscape; (3) Reworked Profiles, characterized by bauxite reworked fragments composed by similar materials found in the tops of Rim and Plateau Profiles. After relating altitude to the constituting materials of the bauxite profiles, it is noticed that there are occurrences of Rim Bauxite Profiles located in altitudes of Plateau Profiles and Reworked Profiles located over Rim Profiles, above 1,400 meters of altitude. In the opposite direction, tops of the same elevation are found, where there should be Rim Profiles, there are rocky outcrops observed in field, without any evidence of laterite profiles. It is concluded, therefore, that the elevation rates by themselves, at least in this area, are not good enough references to determine the existence and distribution of paleosurfaces.

Descentralização fiscal, políticas sociais e transferência de renda no Brasil

Incluye Bibliografía

Integração de imagens vetoriais e matriciais na visualização dos levantamentos realizados com a unidade móvel de mapeamento digital

Pós-graduação em Ciências Cartográficas - FCT

Estrutura de comunidades e influência da heterogeneidade ambiente na diversidade de anuros em área de pastagem no sudeste do Brasil

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

Helmintofauna de Chelonia mydas necropsiadas na base do Projeto Tamar-Ibama em Ubatuba, Estado de São Paulo, Brasil

Pós-graduação em Biologia Geral e Aplicada - IBB

Extração semi-automática do eixo de rodovia em imagens de média e alta resolução usando programação dinâmica

Pós-graduação em Ciências Cartográficas - FCT

Fluxos do espiritismo kardecista no Brasil: dentro e fora do continuum mediúnico

Pós-graduação em Ciências Sociais - FFC

Restabelecimento funcional do tendão extensor digital longo submetido à tenectomia em eqüinos: observação macroscópica, ultra-sonográfica e histopatológica

Pós-graduação em Medicina Veterinária - FMVZ

Estudo da helmintofauna do lagarto Tupinambis merianae Dumeril e Bibron, 1839 (Reptilia: Squamata, Teiidae) procedentes do arquipélago de Fernando de Noronha, Pernambuco, Brasil e relação com a fauna endêmica de lagartos do arquipélago

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

Comunicação midiática nas (arqui)dioceses do Brasil: possibilidades para ser igreja virtual

Pós-graduação em Comunicação - FAAC

Pequenos atos de heroísmo: as redes sociais como mediadoras do processo de inclusão digital

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

A identidade do brasileiro segundo o Le Monde Diplomatique Brasil

Pós-graduação em Comunicação - FAAC