Coupling vortex dynamics with collective excitations in Bose-Einstein Condensates

Here we analyze the collective excitations as well as the expansion of a trapped Bose-Einstein condensate with a vortex line at its center. To this end, we propose a variational method where the variational parameters have to be carefully chosen in order to produce reliable results. Our variational calculations agree with numerical simulations of the Gross-Pitaevskii equation. The system considered here turns out to exhibit four collective modes of which only three can be observed at a time depending of the trap anisotropy. We also demonstrate that these collective modes can be excited using well established experimental methods such as modulation of the s-wave scattering length

Primeiro registro de nematoide de cisto da soja na Região Centro-Sul de Mato Grosso do Sul.

O nematoide de cisto da soja (NCS), Heterodera glycines, é um dos principais fatores limitantes à produção de soja no Brasil. Desde a sua constatação na safra 1991/1992, o NCS distribuiu-se por praticamente todas as regiões produtoras de soja do País, estando presente atualmente em cerca de 2 milhões de hectares nos seguintes estados: Rio Grande do Sul, Paraná, São Paulo, Mato Grosso do Sul, Mato Grosso, Minas Gerais, Goiás, Tocantins, Maranhão e Bahia (EMBRAPA, 2009). Em Mato Grosso do Sul, o NCS permaneceu limitado às regiões Norte e Nordeste do estado, onde causa perdas consideráveis.bitstream/item/51822/1/COT-2011-170.pd

Tracking and Data Relay Satellite System (TDRSS) Range and Doppler Tracking System Observation Measurement and Modeling

This document gives detailed descriptions of the tracking services, signal generation and processing, range and Doppler extraction, and the principles and procedures involved in modeling range and Doppler observations via the Tracking and Data Relay Satellite System (TDRSS). Major topics discussed include the following: TDRSS telecommunication services, functional description of the TDRSS, tracking signal generation and processing, range and Doppler observations modeling, angular observed and computed measurement algorithms, and tracking data transmission format

Numerical modelling of flood control areas with controlled reduced tide

The present paper focuses on the numerical modelling in TELEMAC-3D of flood control areas with controlled reduced tide structures along the Scheldt estuary and coastal zone for the storm event of December 6th, 2013. A new culvert functionality was implemented in the code to better represent the hydrodynamics of the exchange of water between the Scheldt estuary and these flood control areas with controlled reduced tide. Existing source and sink terms included in the code were paired and used as a culvert. The theoretical background to represent the different kind of flows through the culvert was based on the work of Bodhaine (1968). Additionally different head loss coefficients were introduced according to different geometric features of the culverts. The implementation of these new structures inside the 3D numerical model was validated using measured water levels in the estuary and inside the flooding areas , and using discharges (in and out) through the culverts measured only for one full tidal cycle. For the storm surge only measured water levels were available and these were compared with modelled ones