Intensity Of Signals
Mostrando 13-24 de 151 artigos, teses e dissertações.
-
13. Study of muscle fatigue in isokinetic exercise with estimated conduction velocity and traditional electromyographic indicators
INTRODUCTION: In the study of human biomechanics, it is often desirable to evaluate fatigue in the muscles that are involved in performing a particular task. Identifying the phenomena responsible for this condition is a problem that in most cases is complex and requires appropriate research mechanisms. Isokinetic dynamometry (ID) and surface electromyography
Rev. Bras. Eng. Bioméd.. Publicado em: 2014-12
-
14. Neurophysiological correlates of color vision: a model
The tree-receptor theory of human color vision accounts for color matching. A bottom-up, non-linear model combining cone signals in six types of cone-opponent cells in the lateral geniculate nucleus (LGN) of primates describes the phenomenological dimensions hue, color strength, and lightness/brightness. Hue shifts with light intensity (the Bezold-Brücke ph
Psychol. Neurosci.. Publicado em: 2013
-
15. Avalanches e redes complexas no modelo Kinouchi-Copelli / Avalanches and complex networks in Kinouchi-Copelli model
The capacity of a sensory system in efficiently detecting stimuli is usually given by the dynamic range, a simple measure of the range of stimulus intensity over which the network is sensible enough. Many times biological systems exhibit large dynamic ranges, covering many orders of magnitude. There is no easy explanation for that, since individual neurons p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/08/2012
-
16. ANALISE E PROJETO DO CONVERSOR BUCK INTERCALADO PARA ALIMENTAÇÃO DE LÂMPADAS DE DESCARGA EM ALTA PRESSÃO DE ALTA POTÊNCIA / INTERLEAVED BUCK CONVERTER ANALYSIS FOR HIGH POWER HIGH INTENSITY DISCHARGE LAMPS SUPPLYING
This work presents a detailed analysis about the interleaved buck converter applied to electronic ballasts to supply high power HID lamps, assuming the input voltage as a PFC stage output. As the output capacitor has a maximum value to be applied in parallel with the lamp, parallel operated converters are a suitable choice because the output current ripple c
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/02/2012
-
17. Precessão Livre de Onda Contínua (CWFP) como ferramenta para supressão do sinal de solvente em RMN de alta resolução / Continuous wave free precession (cwfp) as tool for solvente suppression in high resolution nmr spectroscopy
The application of Continuous Wave Free Precession (CWFP) method for solvent suppression in high resolution NMR spectroscopy is reported. The applied methodology was based in the use of conventional pulse sequence that use a train of pulses with same phase, intensity and duration, separated by a time interval (Tp) shorter than the longitudinal (T1) and trans
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/08/2011
-
18. Conversão em comprimento de onda de sinais modulados em fase por mistura de quatro ondas em SOAs / Wavelength conversion of phase modulated channels by four-wave mixing in SOAs
Recently semiconductor optical amplifiers (SOAs) have been the focus of interest in several applications. One of the most common SOA roles is as a wavelength converter, where the device transfers information content among optical carriers in the optical domain. Four wave mixing (FWM), cross-gain modulation (XGM), and cross-phase modulation (XPM) are major no
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
-
19. Análise de criticidade de descontinuidade em um bocal de um vaso de pressão
Pressure vessels and pipes are essential equipment in the chemical, petrochemical, petroleum refining, among others. The safety operation of this equipment is an important aspect, since failures can vary from large financial losses to catastrophic consequences. Evaluation discontinuity found in inspections can be perfomed by fitness for service methodology w
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
-
20. Estudo topográfico da dor de origem dentária / Study of refered pain of dental origin
The majority of patients who suffer from toothache report referred pain to other sites in the head and neck. Thus, the aim of this study was to investigate the clinical and psychophysical characteristics of referred pain in the orofacial region and how factors such as intensity, duration and nature of odontogenic pain might modulate them. We employed psychop
Publicado em: 2010
-
21. Characterization of traveling ionospheric disturbances over low latitude brazilian region associated to Perkins plasma instability generated at medium latitudes / Caracterização de distúrbios ionosféricos propagantes na região de baixas latitudes no setor brasileiro associados à instabilidade de plasma Perkins gerada em médias latitudes
With ground based measurements of OI 630 nm emission, by using all-sky imaging system installed at Cachoeira Paulista, we investigated the occurrence of specific events of Medium Scale Traveling Ionospheric Disturbances (MSTIDs), which occurred during nights geomagnetically quiet. Probably, these disturbances are associated with Perkins plasma instability ge
Publicado em: 2010
-
22. Association between clinicopathological variables and the immunohistochemical expression of Ezrin and CD44 in patients with osteosarcoma / Estudo da associação das variáveis clínico-patológicas com a expressão imunoistoquímica de Ezrin e CD44 em pacientes portadores de osteossarcoma
Metastasis is the most important prognostic factor in patients with osteosarcoma. Identification of genes that are crucial for metastatic dissemination is of great interest, not only to gain a basic understanding of the molecular and cellular processes involved, but also to provide the potential for new therapeutic targets. In relation to osteosarcoma, it ha
Publicado em: 2010
-
23. Evaluation of the electromyographic signal and the histomorphometry of vastus lateralis muscle in different electrodes placement, intensities of contraction and genders / Avaliação do sinal eletromiografico e da histomorfometria do musculo vasto lateral em diferentes posicionamentos de eletrodos, intensidades de contração e generos
It has been shown that electromyography signal (EMGs) and histomorphometry are different along the muscle belly and between genders, although the relationship between these parameters is not clear. The aim of this study was to evaluate the EMGs in different intensities of volunteer isometric muscle contraction (10-100%) and electrodes positions over the bell
Publicado em: 2010
-
24. Development of an optical fluorescence imaging system for medical use / Desenvolvimento de um sistema por imagem de fluorescência óptica para uso médico-odontológico
Optical fluorescence has been applied to several medical areas, as to monitor drug degradation and cancer detection, due to its high sensitivity, simplicity and fast response. Non-invasive and non-destructive assessment of tissues using this technique is very attractive for clinical diagnosis. Hence, the aim of was the development of an optical fluorescence
Publicado em: 2010