Spectral Database
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. Evaluation of the Metabolic Profile of Arabica Coffee via NMR in Relation to the Time and Temperature of the Roasting Procedure
Coffee is one of the most popular and consumed products in the world, with high nutritional value and economic importance. However, some factors can change the organoleptic properties of a coffee species, without causing significant damage such as loss of important components. The present study evaluated the chemical profile, via nuclear magnetic resonance (
J. Braz. Chem. Soc.. Publicado em: 2021-01
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2. Ground motions for FEMA P-695 application in subduction zones
Abstract The FEMA P-695 report presents a methodology for the rational quantification of seismic performance factors for use in seismic design. Despite the fact that the methodology is comprehensive and covers a wide range of possible applications, it only provides ground motion sets recorded from shallow crustal earthquakes. Therefore, this paper presents a
Lat. Am. j. solids struct.. Publicado em: 25/11/2019
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3. Detecção e classificação de arritmias em eletrocardiogramas usando transformadas wavelets, máquinas de vetores de suporte e rede Bayesiana
The cardiopathies are currently, according the Ministério da Saúde, the second biggest cause of mortality among the Brazilians, behind only the brain vascular diseases. The motivation for the work here presented is the identification and classification of cardiopathies registered in Electrocardiogram exams, ECG, such as premature contractions, branches blo
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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4. Análise da estacionariedade e gaussianidade da atividade elétrica neural, do ruído biológico e do ruído de instrumentação
This work analyzes signals of spontaneous neuronal electrical activity, measured by devices known as Multi-Electrode Arrays (MEA), which are the substrate of neuronal cultures of rat hippocampus. The database under investigation consists of five signals: (i) instrumentation noise, (ii) biological noise, (iii) inactive culture and (iv) two active culture expe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/07/2011
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5. Modelagem da radiação térmica em chamas laminares da combustão de metano em ar
This work analyses the effects of thermal radiation heat transfer on methane-air laminar diffusion flames. The analysis is based on the solution of the equations of continuity, fluid motion, species mass-fraction and enthalpy. The soot formation is accounted with a twoequation model while a chemistry mecanism with 112 reactions is used for the combustion of
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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6. Modelagem espectral da radiação em processos de combustão baseada no método do número de onda acumulado
O trabalho apresenta uma modificação do modelo do número de onda cumulativo (CW – Cumulative Wavenumber) para atender ao balanço de energia na determinação da transferência radiante de gases participantes não uniformes. De um modo geral, o modelo CW fornece resultados que se mostram precisos para o divergente do fluxo de calor radiante (ou taxa vol
Publicado em: 2010
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7. DISTRIBUTED RECOGNITION FOR CONTINUOUS SPEECH IN LARGE VOCABULARY BRAZILIAN PORTUGUESE / RECONHECIMENTO DISTRIBUÍDO DE VOZ CONTÍNUA COM AMPLO VOCABULÁRIO PARA O PORTUGUÊS BRASILEIRO
This Thesis aims at exploring several approaches for performance improvement of the Automatic Speech Recognition System with large vocabulary for the Brazilian Portuguese when applied in a distributed scenario (Distributed Speech Recognition). With this purpose, a speech database for continuous speech recognition for the Brazilian Portuguese with 100 speaker
Publicado em: 2009
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8. Automatic in-vivo MRS signal quantification for the classification of brain tumors / Quantificação de sinais de MRS do cerebro in-vivo para classificação de tumores
The aim of this work was to study and validate techniques for pre-processing and quantificating Magnetic Resonance Spectroscopy data, obtained in vivo from the human brain, in order to get information clinically useful for the study and diagnosis of brain tumors. Therefore, a literature-based study of the technique was made, including a review of the Physics
Publicado em: 2008
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9. Identification of acetates in elasmopalpulus lignosellus pheromone glands using a newly created mass spectral database and kóvats retention indices
Based on a specially created mass spectral database utilizing 23 tetradecenyl and 22 hexadecenyl acetate standards along with Kóvats retention indices obtained on a very polar stationary phase [poly (biscyanopropyl siloxane)] (SP 2340), (Z)-9-hexadecenyl acetate, (Z)-11-hexadecenyl acetate and (E)-8-hexadecenyl acetate were identified in active pheromone ex
Química Nova. Publicado em: 2007-08
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10. "Utilização do método dos povoamentos na caracterização de comunidades bentônicas em trecho do infralitoral consolidado da Enseada das Palmas, Ilha Anchieta, Ubatuba (SP)" / Settlements method for the characterization of hard bottom benthic communities in an infralittoral stretch in Palmas Bay, Anchieta Island, Ubatuba (SP)
The biodiversity characterization of benthic communities in the Brazilian coast is limited to a few works, which studied an area of about 3,400 m2. The objective of this study was to propose a new method, unprecedented in hard bottom marine communities, based in the sampling of landscape heterogeneity units, named physiognomies and settlements, aiming at an
Publicado em: 2007
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11. Elucidando os estados de oxidação do nitrogênio através da espectroscopia de absorção de raios-X na borda K do nitrogênio
The potentialities of X-ray Absorption Near Edge Spectroscopy (XANES) of the N K edge (N K) obtained with the spherical grating monochromator beam line at the Brazilian National Synchrotron Light Laboratory are explored in the investigation of poly(aniline), nanocomposites and dyes. Through the analysis of N K XANES spectra of conducting polymers and many ot
Química Nova. Publicado em: 2006-07
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12. Studies about personalization of the head-related transfer function in binaural virtual auditory displays. / Estudos sobre personalização da função de transferência relativa à cabeça em sistemas biaurais de reprodução acústica virtual.
This work presents several proposals associated with the optimal use of head-related transfer functions (HRTF) in virtual auditory spaces presented via headphones. These proposals lead to personalization of the HRTF to particular individuals, using a combination of the structural and morphological modeling techniques. In the context of structural modeling, t
Publicado em: 2006