Encontrados 147 documentos, a visualizar página 1 de 15
Using active and passive acoustics to assess O2 production of a Posidonia ocean...
Felisberto, P.; Zabel, F.; Rodriguez, O. C.; Santos, P.; Jesus, S. M.; Champenois, W.; Borges, A. V.; Santos, RuiThis work discusses the data acquired during two experiments conducted in October 2011 and May 2013 in the Bay of la Revellata, Calvi, Corsica for the purpose of developing an acoustic system for monitoring the oxygen production of a seagrass meadow.
Correlation between the acoustic noise field measured in a Posidonia oceanica b...
Felisberto, P.; Zabel, F.; Rodriguez, O. C.; Santos, P.; Jesus, S. M.; Champenois, W.; Borges, A. V.; Santos, R.During the period of one week, from May 8 to 15, 2013, acoustic data was gathered at three locations over a Posidonia oceanica bed in the Bay of Revellata, Corsica. Preliminary analysis of the acoustic data shows that the environmental noise field in the band 2-7kHz was dominant during the period. The noise in this band is generally associated with wind and surface agitation. However, the noise power was not si...
Multi-dimensional optimization of the incorporation of PCM-drywalls in lightwei...
Soares, N.; Gaspar, A. R.; Santos, P.; Costa, J. J.This paper evaluates the impact of PCM-drywalls in the annual and monthly heating and cooling energy savings of an air-conditioned lightweight steel-framed (LSF) residential single-zone building, considering real-life conditions and several European climates. A multi-dimensional optimization study is carried out by combining EnergyPlus and GenOpt tools. The CondFD-algorithm is used in EnergyPlus to simulate pha...
Depressão nos adolescentes – mito ou realidade?
Resende, C.; Santos, E.; Santos, P.; Ferrão, A.RESUMO Introdução: A adolescência é um período de grandes mudanças a nível biopsicossocial, o que torna esta fase mais vulnerável a alterações psicológicas. A depressão surge como uma entidade clínica cada vez mais prevalente, podendo ser precursora de psicopatologia no adulto. Objetivos: Avaliar a prevalência e caracterizar a população de adolescentes com síndrome depressivo na consulta de adolescência. Materi...
Severe stress urinary incontinence: pelvic floor muscle training program
Ferreira, Margarida; Santos, P. C.; Duarte, José A.International guidelines recommend a first line therapy in the treatment of female stress urinary incontinence (SUI), the pelvic floor muscle (PFM) training. This case report assesses the effects of the PFM training program in treating women with severe SUI. The urodynamic parameters allow diagnosed intrinsic sphincter deficiency and urethral hypermobility. The subjective and objective parameters were assessed ...
Food consumption, physical activity and socio-economic status related to BMI, w...
Abreu, Sandra; Santos, Rui; Moreira, Carla; Santos, P. C.; Mota, Jorge; Moreira, PedroObjective: To examine the association between obesity and food group intakes, physical activity and socio-economic status in adolescents. Design: A cross-sectional study was carried out in 2008. Cole’s cut-off points were used to categorize BMI. Abdominal obesity was defined by a waist circumference at or above the 90th percentile, as well as a waist-to-height ratio at or above 0?500. Diet was evaluated using a...
Comparing the resolution of Bartlett and MVDR estimators for bottom parameter e...
Felisberto, P.; Schneiderwind, J.; Santos, P.; Rodriguez, O. C.; Jesus, S. M.This work compares the resolution of a pressure and vector sensor based conventional Bartlett estimator, with their MVDR estimator counterparts, in the context of bottom characterization with a short vertical array. Santos et al. [1]demonstrated the gain of a vector sensor array (VSA) based linear estimator (Bartlett) for generic parameter estimation. Moreover, it was shown that for bottom characterization the ...
Load forecasting, the importance of the probability “tails” in the definition o...
Santos, P. J.; Rafael, Silviano; Pires, A. J.The load forecast is part of the global management of the electrical networks, namely at the transport and distribution levels. This type of methodologies allows to the system operator, to establish and take some important decisions concerning to the mix production and network management, with the minimum of discretionarity. The load forecast in particularly the peak load forecast, represents an important econ...
An Adaptive PID Speed Controller for an 8/6 Switched Reluctance Machine
Rafael, Silviano; Santos, P. J.; Pires, A. J.This paper presents a classical controller with parameters adaptation capability, in an automatic way. This controller is based on a PID where a parameters adaptation algorithm is used and applied to the switched reluctance motor (SRM) speed control. This PID design do not require any kind of adjustment or calibration from the operator. The parameters adaptation algorithm implemented is based on one fuzzy syste...
Experimental results of underwater cooperative source localization using a sing...
Felisberto, P.; Rodriguez, O. C.; Santos, P.; Ey, Emanuel; Jesus, S. M.This paper aims at estimating the azimuth, range and depth of a cooperative broadband acoustic source with a single vector sensor in a multipath underwater environment, where the received signal is assumed to be a linear combination of echoes of the source emitted waveform. A vector sensor is a device that measures the scalar acoustic pressure field and the vectorial acoustic particle velocity field at a single...
| Financiadores do RCAAP | |||||||
|
|
|
|
|
|
||