Vestibular impairment in hemifacial spasm syndrome: A case report

A 52-year-old man presented with left hemifacial spasm (HFS). A magnetic resonance imaging scan showed compression of the left facial nerve at the cerebellopontine angle by a dolichoectatic basilar artery. The neurotological evaluation showed an otolithic deficit, with canalicular preservation and normal hearing. The deficit improved after surgical decompression. No previous report has described the impairment of vestibular function in patients presenting with HFS

Resposta espectral e estimativa remota do vigor de variedades de videira no manejo sítio-específico dos cultivos de uvas para vinhos finos.

Para que o setor vitivinícola brasileiro possa competir no mercado mundial, as vinícolas brasileiras vêm se modernizando e os viticultores têm buscado formas de otimizar a qualidade da matéria-prima. O manejo das áreas heterogêneas dentro de um vinhedo, apoiado em geotecnologias, tem permitido a produção de vinhos de maior qualidade em outros países. Neste trabalho apresenta-se a análise da resposta espectral das variedades de videira e os subsequentes passos a serem implementados para o manejo sítio-específico dos vinhedos. Regiões de maior importância com relação à discriminação de variedades foram identificadas, caminhando-se agora para a correlação destes dados e de dados orbitais com as características fisiológicas das plantas e de qualidade das uvas. Palavras-chave: espectroradiometria; sensoriamento remoto; variedades de Vitis spp. Abstract To compete in the world trade market, the Brazilian wine sector is accommodating its industries and wineries to modern usages and the grape growers are now searching new forms to optimize the quality of their raw material. In other countries, the management of heterogeneous areas within the vineyards, supported by geotecnologies, has allowed the roduction of more quality wines in other countries. This paper presents the analysis of the spectral response of grapevine varieties and the subsequent steps to be implemented for the specific-site management of the vineyards. Regions of major importance in the varieties discrimination have been identified, what is going to be followed by the correlation of these and orbital data with the plants physiological characteristics and grape quality. Keywords: spectroradiomety; remote sensing; Vitis spp. varieties

Solos da Unidade Experimental da Embrapa Uva e Vinho em Bento Gonçalves, RS.

Apresenta a identificação e o levantamento pedológico da Unidade Experimental da Embrapa Uva e Vinho, no município de Bento Gonçalves, RS. A área estudada, localiza-se na Região do Vale dos Vinhedos

Dissipative Dynamics of Matter Wave Soliton in Nonlinear Optical Lattice

Dynamics and stability of solitons in two-dimensional (2D) Bose-Einstein condensates (BEC), with low-dimensional (1D) conservative plus dissipative nonlinear optical lattices are investigated. In the case of focusing media (with attractive atomic systems) the collapse of the wave packet is arrested by the dissipative periodic nonlinearity. The adiabatic variation of the background scattering length leads to metastable matter-wave solitons. When the atom feeding mechanism is used, a dissipative soliton can exist in focusing 2D media with 1D periodic nonlinearity. In the defocusing media (repulsive BEC case) with harmonic trap in one dimension and one dimensional nonlinear optical lattice in other direction, the stable soliton can exist. This prediction of variational approach is confirmed by the full numerical simulation of 2D Gross-Pitaevskii equation.Comment: 9 pages, 8 figure

Levantamento pedológico do Campo Experimental da Embrapa Uva e Vinho em Bento Gonçalves, RS.

Levantamento pedológico do Campo Experimental da Embrapa Uva e Vinho, para subsidiar o Plano de Manejo e o Zoneamento Ambiental.bitstream/CNPM/1827/1/bpd4_solosCNPUV.pd

New Higgs mechanism from the lattice

Spontaneous symmetry breaking has been observed in lattice simulations of five-dimensional gauge theories on an orbifold. This effect is reproduced by perturbation theory if it is modified to account for a finite cut-off. We present a comparison of lattice and analytic results for bulk gauge group SU(2).Comment: 7 pages, 5 figures. Presented at International Europhysics Conference on High Energy Physics (EPS-HEP2007), Manchester, England, 19-25 Jul 200

The Crystal and Mesophase Structure of Hexakis(alkylsulfono)- benzene Homologues by X-Ray Diffractometry

A powder X-ray diffractometer study of hexakis(tridecylsulfono)benzene (HASB13) has been carried out over the temperature range 20 to above 80 °C. In this range three phase transitions are observed by sharp discontinuities in the diffraction pattern indicating a solid-solid, solidmesophase, and mesophase-liquid transition. The mesomorphic phase is identified as a hexagonal columnar discotic mesophase, Dhd, with intercolumnar spacing of 25.7 Å and average stacking distance of 4.9 Å. Both distances are independent of temperature but there appears to be a gradual increase in the stacking disorder as the temperature is increased. The magnitude of the intercolumnar distance suggests a considerable degree of side chain disorder. A detailed X-ray diffraction study was also performed at room temperature on a single crystal of hexakis(propylsulfono) benzene (HASB3), which is not mesogenic. The results provide detailed information on the structure of HASB 3 which is used in the interpretation of HASB 13 results

Characterization of the Use and Occupation of Soil on Rural Properties Using Remotely Piloted Aircraft Systems - RPAS

The use of remotely piloted aircraft systems allows for practicality in the collection and monitoring of study areas or in the development of rehabilitation projects for degraded areas. As such, this technology is gaining space as an alternative for applications in studies and surveys of several areas. This work is justified by the demand for projects and the search for practical alternatives that will enable the framing of rural properties according to the new Brazilian Forestry Code (Codígo Florestal Brasileiro) and its environmental recovery plans (Plano de Recuperação Ambiental). The objective of this study is therefore to evaluate the use of a Remotely Piloted Aircraft System in the monitoring of a rural property, seeking to include it in the framework of the Brazilian Forestry Code. To accomplish this work, information samples were taken in an area of 30.19 ha of a rural property with the use of a Remotely Piloted Aircraft System - RPAS. After the data collection, the images were treated using the QGis software and through the generation of an ortho-mosaic, which enabled the data to be analyzed and interpreted. With the interpretation of land use and occupation data and with the generation of maps of land use and occupation, a diagnosis of the current situation of the area can be obtained. In a second phase, maps were created to include the property in the current legislative framework, seeking its regularization. After the completion of this work, the conclusion can be drawn that the use of a Remotely Piloted Aircraft System - RPAS is viable and enables the monitoring of rural areas with efficiency and speed

Classificação de imagens RapidEye baseada em objetos e análise da ecologia de paisagens como suporte ao componente geoespacial do Inventário Florestal Nacional.

Resumo

Quantum chaos in nanoelectromechanical systems

We present a theoretical study of the electron-phonon coupling in suspended nanoelectromechanical systems (NEMS) and investigate the resulting quantum chaotic behavior. The phonons are associated with the vibrational modes of a suspended rectangular dielectric plate, with free or clamped boundary conditions, whereas the electrons are confined to a large quantum dot (QD) on the plate's surface. The deformation potential and piezoelectric interactions are considered. By performing standard energy-level statistics we demonstrate that the spectral fluctuations exhibit the same distributions as those of the Gaussian Orthogonal Ensemble (GOE) or the Gaussian Unitary Ensemble (GUE), therefore evidencing the emergence of quantum chaos. That is verified for a large range of material and geometry parameters. In particular, the GUE statistics occurs only in the case of a circular QD. It represents an anomalous phenomenon, previously reported for just a small number of systems, since the problem is time-reversal invariant. The obtained results are explained through a detailed analysis of the Hamiltonian matrix structure.Comment: 14 pages, two column