25,864 research outputs found

    An√°lise comparativa do meio f√≠sico e socioecon√īmico de tr√™s munic√≠pios com parques florestais: Araponga, Capara√≥ e S√£o Roque de Minas - MG.

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    O meio f√≠sico, a localiza√ß√£o geogr√°fica, e a hist√≥ria de ocupa√ß√£o de um munic√≠pio contribuem na sua socioeconomia. Do mesmo modo, limita√ß√Ķes f√≠sicas naturais resultam em pouca altera√ß√£o antr√≥pica, protegendo √°reas que podem vir a ser transformadas em unidades de conserva√ß√£o, sob leis de prote√ß√£o ambiental. Estas √°reas, como por exemplo, parques florestais, apresentam potencial tur√≠stico, como uma alternativa socioecon√īmica. Este trabalho √© uma an√°lise comparativa de informa√ß√Ķes municipais socioecon√īmicas, hist√≥ricas e do meio f√≠sico, com o objetivo de investigar uma poss√≠vel influ√™ncia de parques florestais na socioeconomia de munic√≠pios do Estado de Minas Gerais que cont√©m grande parte de suas √°reas com topografia acidentada e altitude elevada. Foram selecionados os munic√≠pios de Araponga, com o Parque Estadual da Serra do Brigadeiro, rec√©m criado em 1996; Capara√≥, com o Parque Nacional de Capara√≥, criado em 1962; e S√£o Roque de Minas, com o Parque Nacional da Serra da Canastra, criado em 1972. S√£o Roque de Minas e Capara√≥ s√£o Munic√≠pios tradicionalmente inclu√≠dos na rede tur√≠stica, o que pode vir a ocorrer com Araponga futuramente. Os resultados mostram que os munic√≠pios de Araponga e Capara√≥ apresentam restri√ß√£o topogr√°fica, enquanto que as maiores limita√ß√Ķes de S√£o Roque s√£o devidas ao solo. Historicamente, a forma√ß√£o de Araponga √© semelhante a de Capara√≥, em ocupa√ß√£o. Com rela√ß√£o a localiza√ß√£o geogr√°fica, Araponga est√° melhor situada que S√£o Roque de Minas em dist√Ęncia dos grandes centros, mas as condi√ß√Ķes de acesso s√£o similares. Considerando a socioeconomia, Araponga tem maiores √≠ndices de analfabetismo, evas√£o populacional, menor ICM, menores sal√°rios, e pior distribui√ß√£o de renda. Enfocando o turismo em Capara√≥ e S√£o Roque de Minas, as taxas de visita√ß√£o atingiram 28.613 pessoas para o ano de 1999 em Capara√≥, correspondendo a mais de 400% da popula√ß√£o, e 3.000 pessoas/ano em S√£o Roque de Minas (IBAMA, 1993), que corresponde a 52% da popula√ß√£o. Embora n√£o conclusivo, indica-se, pelas informa√ß√Ķes levantadas, que as piores condi√ß√Ķes socioecon√īmicas de Araponga em rela√ß√£o a Capara√≥ se devam √† situa√ß√£o geogr√°fica e a contribui√ß√£o tur√≠stica na economia de Capara√≥. J√° S√£o Roque de Minas tem melhor desenvolvimento que Araponga e Capara√≥ devido √† origem hist√≥rica e maior por√ß√£o de terras menos acidentadas, refletindo na economia pecu√°ria. A contribui√ß√£o pelo turismo neste munic√≠pio √© ainda modesta.bitstream/CNPS-2010/14880/1/doc-71-municipios-mg.pd

    Manejo de solo em várzea do Rio Guamá com tração animal e microtrator.

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    Efficiency of low versus high airline pressure in stunning cattle with a pneumatically powered penetrating captive bolt gun

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    The efficiency of stunning cattle was assessed in 443 animals (304 pure Zebu and 139 crossbred cattle), being mainly mature bulls and cows. Cattle were stunned using a Jarvis pneumatically powered penetrating captive bolt gun operating with low (160‚Äď175 psi, N = 82) and high (190 psi, N = 363) airline pressure, which was within the manufactures specifications. Signs of brain function and the position of the shots on the heads were recorded after stunning. Velocity of the captive bolt and its physical parameters were calculated. Cattle shot with low pressures showed more rhythmic respiration (27 vs. 8%, P < 0.001), less tongue protrusion (4 vs. 12%, P = 0.03) and less masseter relaxation (22 vs. 48%, P < 0.001). There was an increased frequency of shots in the ideal position when cattle were shot with the low compared to high airline pressures (15.3 vs. 3.1%). Bolt velocity and its physical parameters were significantly (P < 0.01) higher when using high pressure. Airline pressures below 190 psi are inappropriate when shooting adult Zebu beef cattle with pneumatically powered penetrating captive bolt guns

    Hierarchical Spatial Organization of Geographical Networks

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    In this work we propose the use of a hirarchical extension of the polygonality index as a means to characterize and model geographical networks: each node is associated with the spatial position of the nodes, while the edges of the network are defined by progressive connectivity adjacencies. Through the analysis of such networks, while relating its topological and geometrical properties, it is possible to obtain important indications about the development dynamics of the networks under analysis. The potential of the methodology is illustrated with respect to synthetic geographical networks.Comment: 3 page, 3 figures. A wokring manuscript: suggestions welcome

    Characterizing neuromorphologic alterations with additive shape functionals

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    The complexity of a neuronal cell shape is known to be related to its function. Specifically, among other indicators, a decreased complexity in the dendritic trees of cortical pyramidal neurons has been associated with mental retardation. In this paper we develop a procedure to address the characterization of morphological changes induced in cultured neurons by over-expressing a gene involved in mental retardation. Measures associated with the multiscale connectivity, an additive image functional, are found to give a reasonable separation criterion between two categories of cells. One category consists of a control group and two transfected groups of neurons, and the other, a class of cat ganglionary cells. The reported framework also identified a trend towards lower complexity in one of the transfected groups. Such results establish the suggested measures as an effective descriptors of cell shape

    What are the Best Hierarchical Descriptors for Complex Networks?

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    This work reviews several hierarchical measurements of the topology of complex networks and then applies feature selection concepts and methods in order to quantify the relative importance of each measurement with respect to the discrimination between four representative theoretical network models, namely Erd\"{o}s-R\'enyi, Barab\'asi-Albert, Watts-Strogatz as well as a geographical type of network. The obtained results confirmed that the four models can be well-separated by using a combination of measurements. In addition, the relative contribution of each considered feature for the overall discrimination of the models was quantified in terms of the respective weights in the canonical projection into two dimensions, with the traditional clustering coefficient, hierarchical clustering coefficient and neighborhood clustering coefficient resulting particularly effective. Interestingly, the average shortest path length and hierarchical node degrees contributed little for the separation of the four network models.Comment: 9 pages, 4 figure

    Fast Community Identification by Hierarchical Growth

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    A new method for community identification is proposed which is founded on the analysis of successive neighborhoods, reached through hierarchical growth from a starting vertex, and on the definition of communities as a subgraph whose number of inner connections is larger than outer connections. In order to determine the precision and speed of the method, it is compared with one of the most popular community identification approaches, namely Girvan and Newman's algorithm. Although the hierarchical growth method is not as precise as Girvan and Newman's method, it is potentially faster than most community finding algorithms.Comment: 6 pages, 5 figure
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