Results 61 to 70 of about 1,974,870 (293)
On spatial-frequency channels [PDF]
Perception & Psychophysics, 1984 Inan effort to explain the role ofspatial frequency channels in vision, there have been many suggestions, notably by Julesz (1975, 1980; Julesz & Schumer, 1981),Levinson and Frome (Frome, Levinson, Danielson, C Levinson & Frome, 1979), andBraddickand Atkinson (1982), linking them to attention.This idea seems very reasonable in view ofthe fact thatthe
B. Julesz, T. V. Papathomas
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In situ molecular organization and heterogeneity of the Legionella Dot/Icm T4SS
FEBS Letters, EarlyView.We present a nearly complete in situ model of the Legionella Dot/Icm type IV secretion system, revealing its central secretion channel and identifying new components. Using cryo‐electron tomography with AI‐based modeling, our work highlights the structure, variability, and mechanism of this complex nanomachine, advancing understanding of bacterial ...
Przemysław Dutka +11 more
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مجلة علوم ذي قار, 2019 Chopper is an important component in optical system. It represents a device, which changes the angle between the coordinate and vision lines of the target for the electrical signal. The chopper modulates the optical signal by a frequency dependent on the
Mohammed L. Jabbar +1 more
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Dynamically Modulating Plasmonic Field by Tuning the Spatial Frequency of Excitation Light
Nanomaterials, 2020 Based on the Fourier transform (FT) of surface plasmon polaritons (SPPs), the relation between the displacement of the plasmonic field and the spatial frequency of the excitation light is theoretically established. The SPPs’ field shifts transversally or
Sen Wang +5 more
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Exploiting Frequency and Spatial Dimensions in Small Cell Wireless Networks
, 2014 This paper examines the efficiency of spatial and frequency dimensions in serving multiple users in the downlink of a small cell wireless network with randomly deployed access points.
Alexiou, Angeliki, Stefanatos, Stelios
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Fetal Brain Tumor Harboring a Unique ROCK1::BRAF Fusion
Pediatric Blood &Cancer, EarlyView.
Marllon Cindra Sant'Ana +8 more
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Cell wall target fragment discovery using a low‐cost, minimal fragment library
FEBS Letters, EarlyView.LoCoFrag100 is a fragment library made up of 100 different compounds. Similarity between the fragments is minimized and 10 different fragments are mixed into a single cocktail, which is soaked to protein crystals. These crystals are analysed by X‐ray crystallography, revealing the binding modes of the bound fragment ligands.
Kaizhou Yan +5 more
wiley +1 more source
Psicologia: Reflexão e Crítica, 2001 Este trabalho discute a função de sensibilidade ao contraste, FSC, em três seções. A primeira descreve alguns aspectos teóricos e experimentais da FSC relacionados à pesquisa básica e aplicada. A segunda discute alguns estímulos espaciais utilizados para
Natanael Antonio dos Santos +1 more
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Spatial Frequency Discrimination: Effects of Age, Reward, and Practice
PLOS ONE, 2017 Social interaction starts with perception of the world around you. This study investigated two fundamental issues regarding the development of discrimination of higher spatial frequencies, which are important building blocks of perception. Firstly, it mapped the typical developmental trajectory of higher spatial frequency discrimination.
Carlijn van den Boomen +1 more
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Optical Phase-Space-Time-Frequency Tomography
, 2011 We present a new approach for constructing optical phase-space-time-frequency tomography (OPSTFT) of an optical wave field. This tomography can be measured by using a novel four-window optical imaging system based on two local oscillator fields balanced ...
Beck +25 more
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