Uso do DRIS para avaliação do estado nutricional da pimenteira-do-reino, em Tomé-Açu, PA.

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Estimativa de biomassa epígea e estoque de carbono de sistemas agroflorestais em Tomé-Açu, Pará.

Os SAF (sistemas agroflorestais) fazem parte de uma importante estratégia de uso da terra voltada aos serviços ambientais, em especial, à fixação de carbono pela biomassa vegetal. Este trabalho apresenta atividades desenvolvidas com objetivo de estimar a EBE (biomassa epígea) e o EC (estoque de carbono) existentes em SAF no município de Tomé-Açu, Pará, Brasil. Os dados dendrométricos foram obtidos por inventário agroflorestal realizado em 63 parcelas amostrais. Inventariou-se uma taxa de 9027 indivíduos/ha, com DAP ? 2,5 cm, pertencentes a 20 famílias e 29 espécies. Considerando-se a variabilidade encontrada inerente às informações estruturais, florísticas e do estágio vegetativo das plantas, os SAF foram divididos em quatro classes hierárquicas: SAF-1, SAF-2, SAF-3 e SAF-4. Para a estimativa da EBE, utilizou-se o método indireto, baseado em equações alométricas, para diferentes classes diamétricas (DAP?20 cm, DAP<20 cm) e para palmeiras. A média da EBE dos SAF foi de 153,21 Mg ha -1 e do EC foi de 74,30 Mg C ha -1

DETERMINATION OF BODY SEGMENT INERTIA PARAMETERS USING 3D HUMAN BODY SCANNER AND 3D CAD SOFTWARE

In the field of sports biomechanics, a human body is often treated as a linkage model to investigate various kinds of human movement. This modeling requires body segment inertia parameters (BSPs) such as masses, centers of mass, and moments of inertia. As the quality of motion capture system increases, more accurate BSPs are also needed to get accurate inverse dynamics results. Advanced technology has enabled us to obtain three-dimensional coordinates of the entire body surface. A 3D CAD software has also been able to be applied to measure the human body. It was hypothesized that BSPs with high accuracy could be determined by the combination of a 3D body scanner and a 3D CAD software. The purposes of this study are, first, to introduce a new method of measuring subject-specific BSPs and, second, to compare the BSPs from this study with those from an existing mathematical model in order to show that the proposed method can be used to produce more accurate BSPs

Field Detection of Microcracks to Define the Nucleation Stage of Earthquake Occurrence

Main shocks of natural earthquakes are known to be accompanied by preshocks which evolve following the modified Ohmori’s law in average over many samples. Individual preshock activity, however, is far less systematic for predictive purposes. On the other hand, the microcracks in laboratory rock experiments are always preceded to final rupture. And, previous investigations of field acoustic emissions showed that the activity increases prominently before and after the main shock. But there is no detection of any phenomena to identify the nucleation stage. Here we show that a special underground electric field measurement could detect microcracks. Pulse-like variations were classified into three groups (A, B, C) by frequency. The B-type is suggested to define the nucleation period: activity increases sharply following the modified Omori’s law before the main shock and there is no activity afterward. The B-type is subgrouped into three types possibly corresponding to crack-rupture modes. The variations are supposed to be induced by crack occurrence through electrokinetic effects in the elastic-porous medium. The detection distance is suggested to be several orders larger than that of the acoustic emission due to the effective smallness of dissipation rate, and the waveform can be used to infer the rupture mode

Avaliação da avifauna em sistemas agroflorestais com dendê (Elaeis guianeensis) no município de Tomé-Açu (PA).

È apresentada uma comparação entre a composição da avifauna de sistemas agroflorestais (SAF) com dendê, copoeiras e uma monocultura de dendê ao longo de dois anos no intuito de relatar a funcionalidade dos SAFs na manutenção de aves amazônicas. Foram registradas 196 espécies, destas 88 encontradas nos SAFs, 120 na capoeira e 63 na monocultura. Foi observada a ausência de espécies florestais das famílias, Thamnophilidae, Furnaridae e Tyrannidae no SAF e na monocultura de dendê, presentes na capoeira. O índice de similaridade de Morisita mostra que os SAFs se assemelham mais às monoculturas do que às capoeiras, possivelmente devido ao tempo recente de plantio, onde os SAFs ainda não apresentam uma estrutura florestal mais complexa com sub-bosque e dossel. Foi observado um aumento na riqueza de espécies frutívoras e nectarívoras e na diversidade dos SAFs, possivelmente refletindo o contínuo desenvolvimento e estruturação deste sistema. Os resultados apresentados mostram que apesar de os SAFs apresentarem uma comunidade de aves em geral distinta da comunidade encontrada nas capoeiras, estas apresentam índices de diversidade e riqueza de espécies semelhantes. A monocultura de dendê apresentou a menor riqueza e índices de diversidade, além de apresentar principalmente espécies insetívoras, onívoras e granívoras na composição de sua avifauna, configurando um ambiente pouco diverso na estrutura da vegetação. Sistemas agroflorestais de dendê podem vir a contribuir na manutenção da diversidade local de aves florestais amazônicas, contudo os resultados apontam a necessidade de mais tempo para um melhor desenvolvimento do sistema.Editores técnicos: Roberto Porro, Milton Kanashiro, Maria do Socorro Gonçalves Ferreira, Leila Sobral Sampaio e Gladys Ferreira de Sousa

Gasperini syndrome as clinical manifestation of pontine demyelination

The Gasperini syndrome is a very rare brainstem disease characterized by the typical combination of ipsilateral lesions of the cranial nerves V-VII and dissociated contralateral hemihypesthesia, whereas both contralateral and ipsilateral hypacusis was described. Since the first description in 1912, only a few cases of this crossed brainstem syndrome were published so far. Pontine infarction and bleedings were the reported causes of the syndrome. Here we report a 44-year-old man with the classical Gasperini syndrome due to pontine demyelination in multiple sclerosis. The clinical findings were correlated with changes on MRI. The present case shows that classical crossed brainstem syndromes are topological terms not invariably associated with brainstem ischemia in particular vascular areas and may contribute to the differential diagnosis of peripheral facial nerve palsy

ππ\pi\pi scattering S wave from the data on the reaction π−p→π0π0n\pi^-p\to\pi^0\pi^0n

The results of the recent experiments on the reaction $\pi^-p\to\pi^0\pi^0n$ performed at KEK, BNL, IHEP, and CERN are analyzed in detail. For the I=0 $\pi\pi$ S wave phase shift $\delta^0_0$ and inelasticity $\eta^0_0$ a new set of data is obtained. Difficulties emerging when using the physical solutions for the $\pi^0\pi^0$ S and D wave amplitudes extracted with the partial wave analyses are discussed. Attention is drawn to the fact that, for the $\pi^0\pi^0$ invariant mass, m, above 1 GeV, the other solutions, in principle, are found to be more preferred. For clarifying the situation and further studying the $f_0(980)$ resonance thorough experimental investigations of the reaction $\pi^-p\to\pi^0\pi^0n$ in the m region near the $K\bar K$ threshold are required.Comment: 17 pages, 5 figure

Study of the ηπo\eta\pi^o system in the mass range up to 1200 MeV

The reaction $\pi^-p \to \eta\pi^o n$ has been studied with GAMS-2000 spectrometer in the secondary 38 GeV/c $\pi^-$-beam of the IHEP U-70 accelerator. Partial wave analysis of the reaction has been performed in the $\eta\pi^o$ mass range up to 1200 MeV. The $a_0(980)$-meson is seen as a sharp peak in S-wave. The $t$-dependence of $a_0(980)$ production cross section has been studied. Dominant production of the $a_0(980)$ at a small transfer momentum $t$ confirms the hypothesis of Achasov and Shestakov about significant contribution of the $\rho_2$ exchange ($I^GJ^{PC}=1^+2^{--}$) in the mechanism of $a_0(980)$ meson production in $t$-channel of the reaction.Comment: 4 pages, 3 figures, talk given at HADRON'9