Normalized Gradient
Mostrando 1-12 de 15 artigos, teses e dissertações.
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1. Investigation of Size-Dependency in Free-Vibration of Micro-Resonators Based on the Strain Gradient Theory
Abstract This paper investigates the vibration behavior of micro-resonators based on the strain gradient theory, a non-classical continuum theory capable of capturing the size effect appearing in micro-scale structures. The micro-resonator is modeled as a clamped-clamped micro-beam with an attached mass subjected to an axial force. The governing equations of
Lat. Am. j. solids struct.. Publicado em: 2016-03
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2. Uma avaliação sobre características espaço-temporais baseadas em invariantes de cor para reconhecimento de ações
Local spatiotemporal feature has been proved to be a powerful tool to represent latent patterns of moving objects in video scenes. In particular, recognition of human actions has been the principal focus for various growing applications, including video indexing, content-based video retrieval, video summarization, filtering of unwanted content, rating of mov
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/06/2011
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3. Recuperação de imagens multiescala intervalar / Image retrieval by interval multiscale
We present a general method for content-based image retrieval (CBIR) in large image collections, using multiscale interval distance estimation. We consider specifically queries by example, where the goal is to find the image in the collection that is closest to a given image, according to some image distance function. In this work we do not aim to develop me
Publicado em: 2010
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4. Self-tuned vehicle parameters detection and estimation from vÃdeo sequences for traffic incident management.
This work proposes and compares three algorithms for vehicle detection, composed of two main stages, preprocess and process. The first will proceed with the selection of the region of interest (ROI) and the background learning phase. The ROI is a narrow and transversal-to-lane rectangular area wherein detection is achieved, its dimensions provides low proces
Publicado em: 2005
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5. Fatores que influenciam na produtividade dos oceanos: a importÃncia do fluxo de difusÃo dos nutrientes para a biomassa do fitoplÃncton na regiÃo oceÃnica do nordeste brasileiro
In the tropical oceanic region the phytoplankton primary biomass is controlled by light availability and inorganic dissolved nutrients, besides other physical factors as turbulence and sedimentation. The water properties in the photic zone are subjected by a number of different forcing intensities opposite to the deeper waters which varies regularly. In Nort
Publicado em: 2003
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6. Estimations of temperature and humidity of the canopy in Amazon Forest using microwave data from SMMR sensor of Nimbus-7 satellite / Estimativas da temperatura e umidade do dossel na Floresta Amazônica, utilizando dados de microondas do sensor SMMR do satélite Nimbus-7
The forest canopy humidity and temperature of the region of Manaus (3o S, 60° W) have been estimated for the 1985 wet (April-May) and dry (July-August) seasons at 12:00 and 00:00 local standard time, from spaceborne microwave radiometer, along with microwave emission models. The satellite data consist of SMMR (Scanning Multichannel Microwave Radiometer) Nim
Publicado em: 1992
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7. Control of glomerular hypertension by insulin administration in diabetic rats.
Micropuncture studies were performed in Munich Wistar rats made diabetic with streptozotocin and in normal control rats. Diabetic rats received daily ultralente insulin to maintain moderate hyperglycemia (approximately 300 mg/dl). Group 1 diabetic rats studied after routine micropuncture preparation exhibited elevation of the single nephron glomerular filtra
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8. Virus-receptor interaction in the adenovirus system I. Identification of virion attachment proteins of the HeLa cell plasma membrane.
Plasma membranes from HeLa cells were isolated in a two-phase polymer system. To compare the efficiency of attachment protein extraction, a normalized assay for the assessment of adenovirus type 2 (Ad2) receptor-active components interfering with the attachment of Ad2 to HeLa cells was developed. An optimized detergent extraction procedure, 0.5% Triton X-100
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9. Impaired uptake of glutathione by hepatic mitochondria from chronic ethanol-fed rats. Tracer kinetic studies in vitro and in vivo and susceptibility to oxidant stress.
Isolated hepatocytes incubated with [35S]-methionine were examined for the time-dependent accumulation of [35S]-glutathione (GSH) in cytosol and mitochondria, the latter confirmed by density gradient purification. In GSH-depleted and -repleted hepatocytes, the increase of specific activity of mitochondrial GSH lagged behind cytosol, reaching nearly the same
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10. Thermal Gradient Gel Electrophoresis Analysis of Bioprotection from Pollutant Shocks in the Activated Sludge Microbial Community
We used a culture-independent approach, namely, thermal gradient gel electrophoresis (TGGE) analysis of ribosomal sequences amplified directly from community DNA, to determine changes in the structure of the microbial community following phenol shocks in the highly complex activated sludge ecosystem. Parallel experimental model sewage plants were given shock
American Society for Microbiology.
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11. Genetic heterogeneity of "normal" human erythrocyte glucose-6-phosphate dehydrogenase: an isoelectrophoretic polymorphism.
Quantitative determination of glucose-6-phosphate dehydrogenase (G6PD; D-glucose-6-phosphate: NADP+ 1-oxidoreductase, EC 1.1.1.49) activity was carried out in 214 male Nigerian children of 84 mothers with known Gd genotype. The relative intrasibship difference in G6PD activity (normalized to the lowest value within the sibship) was below 0.18 in all cases bu
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12. Therapeutic advantage of converting enzyme inhibitors in arresting progressive renal disease associated with systemic hypertension in the rat.
Micropuncture and morphologic studies were performed in six groups of male Munich-Wistar rats after removal of the right kidney and segmental infarction of two-thirds of the left kidney. Groups 1 and 4 received no specific therapy. Groups 2 and 5 were treated with the angiotensin I-converting enzyme inhibitor, enalapril, 50 mg/liter, in the drinking water. G