Bottom Up And Top Down Mechanisms
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Diffusion and adaptation of the regulatory agency model in Brazil
Resumo Este artigo examina a difusão de agências reguladoras independentes no Brasil, demonstrando de que forma a interação entre variáveis relacionadas ao contexto local e mecanismos tradicionais de difusão levaram a um expressivo processo de agencificação. Embora mecanismos top-down, bottom-up e horizontais tenham desempenhado um papel importante n
Rev. Adm. Pública. Publicado em: 10/01/2020
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2. Controlled synthesis of noble metal nanomaterials: motivation, principles, and opportunities in nanocatalysis
ABSTRACT This review describes some principles of the controlled synthesis of metal nanoparticles, focusing on how the fundamental understanding of their synthesis in the solution-phase can be put to tailor size, shape, composition, and architecture. The maneuvering over these parameters not only enable the tuning of properties, but also the maximization and
An. Acad. Bras. Ciênc.. Publicado em: 16/04/2018
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3. Tamanhos pictóricos percebidos sobre gradientes de textura desenhados e fotografados após exposições breves / Pictorial size perceived under line-drawing and photographed texture gradient after brief exposures
O presente estudo teve por objetivo investigar a dinâmica temporal da percepção de tamanho de objetos inseridos em gradientes de textura, provenientes de desenho gerado computacionalmente (gradiente de perspectiva) e de fotografia com elementos naturais (gradiente fotografado). Além disso, verificou-se a ocorrência e padrão dos movimentos oculares nest
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 11/09/2012
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4. Regulation of foraging areas and structuring of termite communities / Regulação de areas de forrageamento e estruturação de comunidades de cupins
The use of habitats by animals depends on the balance of costs and bene ts associated to foraging, like availability of resources and negative interactions. Termites (Insecta: Isoptera) are detritivorous organisms with great economic and ecological importance. However, the mechanisms that structure their communities are not completely known. So, the objectiv
Publicado em: 2009
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5. Top-down processing mediated by interareal synchronization
Perception and cortical responses are not only driven “bottom-up” by the external stimulus but are altered by internal constraints such as expectancy or the current behavioral goal. To investigate neurophysiological mechanisms of such top-down effects, we analyzed the temporal interactions of neurons on different levels of the cortical hierarchy dur
The National Academy of Sciences.
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6. The Effect of Learning on the Function of Monkey Extrastriate Visual Cortex
One of the most remarkable capabilities of the adult brain is its ability to learn and continuously adapt to an ever-changing environment. While many studies have documented how learning improves the perception and identification of visual stimuli, relatively little is known about how it modifies the underlying neural mechanisms. We trained monkeys to identi
Public Library of Science.
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7. Attentional modulation of effective connectivity from V2 to V5/MT in humans
The nonlinear nature of integration among cortical brain areas renders the effective connectivity between them inherently dynamic and context-sensitive. One emerging architectural principle of functional brain organization, which rests explicitly on these nonlinear interactions, is that neuronal responses expressed at any level in a sensory hierarchy reflect
The National Academy of Sciences.