نتایج جستجو برای: directional perception

تعداد نتایج: 206609  

The effects of using both directions and directional subdividing on adaptive gridembedding on the computational time and the number of grid points required for the same accuracy are considered. Directional subdividing is used from the beginning of the adaptation procedure without any restriction. To avoid the complication of unstructured grid, the semi-structured grid was used. It is used to so...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1388

تحقیق حاضر به بررسی درک دانشجویان از مزایا و معایب آزمون های کامپیوتری تافل و تاثیر جنسیت بر درک آنها پرداخته است. شرکت کنندگان در این تحقیق 100 نفرزبان آموز مرد و زن بودند که در آزمون کامپیوتری تافل در ایران شرکت کرده بودند. پرسشنامه یی که در مورد مزایا و معایب آزمون های کامپیوتری در مقایسه با آزمون های کاغذی توسط محقق تهیه شده بود جهت تکمیل به این افراد ارایه شد. داده های بدست آمده در این مطا...

Journal: :J. Inf. Sci. Eng. 2004
Chung-Ming Wang Jiunn-Shyan Lee

The line integral convolution (LIC) method, originally developed for imaging vector fields in scientific visualization, has the potential to produce images with directional characteristics. In this paper, we present four techniques to explore the use of LIC in generating images in the style of the Impressionists. In particular, we develop an Impressionist Line Integral Convolution algorithm (IL...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Adrià Tauste Campo Marina Martinez-Garcia Verónica Nácher Rogelio Luna Ranulfo Romo Gustavo Deco

Neural correlations during a cognitive task are central to study brain information processing and computation. However, they have been poorly analyzed due to the difficulty of recording simultaneous single neurons during task performance. In the present work, we quantified neural directional correlations using spike trains that were simultaneously recorded in sensory, premotor, and motor cortic...

2015
Baingio Pinna

According to Helmholtz's Square illusion, a square appears wider when it is filled with vertical lines and higher when filled with horizontal lines (Helmholtz von, 1866). Recently, Pinna (2010a) demonstrated that the grouping of small squares on the basis of the similarity principle influences also perception of their shape and of the whole emerging shapes. The direction imparted by grouping is...

Journal: :The Journal of experimental biology 2011
Sebastian Schwarz Laurence Albert Antoine Wystrach Ken Cheng

Many animal species, including some social hymenoptera, use the visual system for navigation. Although the insect compound eyes have been well studied, less is known about the second visual system in some insects, the ocelli. Here we demonstrate navigational functions of the ocelli in the visually guided Australian desert ant Melophorus bagoti. These ants are known to rely on both visual landma...

Journal: :Human brain mapping 2009
Fa-Hsuan Lin Keiko Hara Victor Solo Mark Vangel John W Belliveau Steven M Stufflebeam Matti S Hämäläinen

A persistent problem in developing plausible neurophysiological models of perception, cognition, and action is the difficulty of characterizing the interactions between different neural systems. Previous studies have approached this problem by estimating causal influences across brain areas activated during cognitive processing using structural equation modeling (SEM) and, more recently, with G...

Journal: :The Journal of experimental biology 2014
Felix A Hager Wolfgang H Kirchner

Although several behavioural studies demonstrate the ability of insects to localise the source of vibrations, it is still unclear how insects are able to perceive directional information from vibratory signals on solid substrates, because time-of-arrival and amplitude difference between receptory structures are thought to be too small to be processed by insect nervous systems. The termite Macro...

Journal: :Neural networks : the official journal of the International Neural Network Society 2003
Ennio Mingolla

A neural model is developed of how motion integration and segmentation processes compute global motion percepts. Figure-ground properties, such as occlusion, influence which motion signals determine the percept. For visible apertures, a line's extrinsic terminators do not specify true line motion. For invisible apertures, a line's intrinsic terminators create veridical feature tracking signals,...

Journal: :Estudios económicos 2022

This work aimed to analyze the causality between corruption and poverty in Brazil a group of seven other South American countries, from 2002 2018, using methodology applied by Dumitrescu Hurlin (2012) for heterogeneous panels. The variables employed are Corruption Perception Index (CPI)and Control (CC) index and, as measures poverty, indexes proposed Foster, Greer, Thorbecke (1984), considering...

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