نتایج جستجو برای: local coherence

تعداد نتایج: 598725  

Journal: :Vision Research 1998
David Alais Maarten J van der Smagt A. V van den Berg W. A van de Grind

Using stimuli composed of two independent gratings viewed through multiple apertures, we investigate a number of parameters affecting the integration of locally ambiguous motions into globally coherent motion. In four experiments, we varied local factors (grating spatial frequency, speed, contrast, duty cycle, orientation) and global factors (degree of similarity and common fate between the gra...

Journal: :Journal of vision 2012
Melanie Palomares Justin M Ales Alex R Wade Benoit R Cottereau Anthony M Norcia

We measured neural responses to local and global aspects of form and motion stimuli using frequency-tagged, steady-state visual evoked potentials (SSVEPs) combined with magnetic resonance imaging (MRI) data. Random dot stimuli were used to portray either dynamic Glass patterns (Glass, 1969) or coherent motion displays. SSVEPs were used to estimate neural activity in a set of fMRI-defined visual...

2010
Tamami Nakano Haruhisa Ota Nobumasa Kato Shigeru Kitazawa

Individuals with autism spectrum disorders (ASD) are superior in processing local features. Frith and Happe conceptualize this cognitive bias as 'weak central coherence', implying that a local enhancement derives from a weakness in integrating local elements into a coherent whole. The suggested deficit has been challenged, however, because individuals with ASD were not found to be inferior to n...

2005
Mirella Lapata Regina Barzilay

This paper investigates the automatic evaluation of text coherence for machine-generated texts. We introduce a fully-automatic, linguistically rich model of local coherence that correlates with human judgments. Our modeling approach relies on shallow text properties and is relatively inexpensive. We present experimental results that assess the predictive power of various discourse representatio...

2016
Dror Cohen Oressia H Zalucki Bruno van Swinderen Naotsugu Tsuchiya

What characteristics of neural activity distinguish the awake and anesthetized brain? Drugs such as isoflurane abolish behavioral responsiveness in all animals, implying evolutionarily conserved mechanisms. However, it is unclear whether this conservation is reflected at the level of neural activity. Studies in humans have shown that anesthesia is characterized by spatially distinct spectral an...

Journal: :Journal of cognitive neuroscience 2011
Ruth de Diego-Balaguer Lluis Fuentemilla Antoni Rodríguez-Fornells

Language acquisition is a complex process that requires the synergic involvement of different cognitive functions, which include extracting and storing the words of the language and their embedded rules for progressive acquisition of grammatical information. As has been shown in other fields that study learning processes, synchronization mechanisms between neuronal assemblies might have a key r...

2010
Leslie M. Kay Philip Lazzara

29 30 Previous studies in waking animals have shown that the frequency structure of olfactory bulb 31 (OB) local field potential oscillations is very similar across the OB, but large low-impedance 32 surface electrodes may have favored highly coherent events, averaging out local 33 inhomogeneities. We tested the hypothesis that OB oscillations represent spatially homogeneous 34 phenomena at all...

2004
J. RODRIGUEZ-ASOMOZA D. BAEZ-LOPEZ R. ROSAS-ROMERO

This work describes an experimental system for sensing and transmission of electric signals using optical coherence modulation of light. The system consists of a Ti:LiNbO3 optical coherence modulator acting as electric signal sensor. The main characteristics of coherence-modulated transmissions include the need of using broad-band optical sources and integrated optics lithium niobate electro-op...

2000
Yves Ducq Bruno Vallespir Guy Doumeingts

This paper aims at describing methods for the coherence analysis in production systems. This coherence between the various objectives of the decision system is analysed in order to ensure that the achievement of local performances allows the achievement of the global ones, assigned to the whole enterprise. The coherence analysis methods are usable for quantitative objectives, whatever the kinds...

2015
Andrey Sosnovsky Victor Kobernichenko

Interferometric coherence is an important indicator of reliability for interferograms obtained by interferometric synthetic aperture radar (Interferometric SAR, InSAR). Areas with low coherence values are unsuitable for interferometric data processing. Also, it may be used as a classification parameter for various coverage types. Coherence magnitude can be calculated as an absolute value of the...

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