نتایج جستجو برای: substantial motion

تعداد نتایج: 348353  

Journal: :Vision Research 2004
Harold E. Bedell Susana T.L. Chung Saumil S. Patel

When the eyes move, the images of stationary objects sweep across the retina. Despite this motion of the retinal image and the substantial integration of visual signals across time, physically stationary objects typically do not appear to be smeared during eye movements. Previous studies indicated that the extent of perceived motion smear is smaller when a stationary target is presented during ...

Journal: :iranian journal of radiation research 0
a. esmaili torshabi medical physics group, department of electrical and computer engineering, graduate university of advanced technology, haftbagh st. 7631133131, kerman, iran

background: in radiation treatment of moving targets located in thorax region of patient body, the delivered dose does not match with the planned treatment, resulting in some over and under dosage in the tumor volume, as a function of motion magnitude and frequency. several efforts have been done to investigate the target motion effects on dose distribution in the target and surrounding normal ...

2016
Fenggong Wang Steve M. Young Fan Zheng Ilya Grinberg Andrew M. Rappe

Spontaneous polarization and inversion symmetry breaking in ferroelectric materials lead to their use as photovoltaic devices. However, further advancement of their applications are hindered by the paucity of ways of reducing bandgaps and enhancing photocurrent. By unravelling the correlation between ferroelectric materials' responses to solar irradiation and their local structure and electric ...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1985
J Wallman J Velez

To investigate the relation of the directional organization of the accessory optic system (AOS) to that of its principal behavioral output, optokinetic nystagmus (OKN), we measured the eye velocity during OKN in response to 14 directions of stimulus motion, including horizontal, vertical, cyclorotational (rotations about the optic axis), and intermediate directions in both neonatal and older ch...

2013
Li-Ting Huang Alice M. K. Wong Carl P. C. Chen Wei-Han Chang Ju-Wen Cheng Yu-Ru Lin Yu-Cheng Pei

How is motion information that has been obtained through multiple viewing apertures integrated to form a global motion percept? We investigated the mechanisms of motion integration across apertures in two hemifields by presenting gratings through two rectangles (that form the dual barber poles) and recording the perceived direction of motion by human observers. To this end, we presented dual ba...

Journal: :Current Biology 2004
Paul V McGraw Vincent Walsh Brendan T Barrett

Until recently, it was widely believed that object position and object motion were represented independently in the visual cortex. However, several studies have shown that adaptation to motion produces substantial shifts in the perceived position of subsequently viewed stationary objects. Two stages of motion adaptation have been proposed: an initial stage at the level of V1 and a secondary sta...

Journal: :Journal of neurophysiology 2010
Chen Ping Yu William K Page Roger Gaborski Charles J Duffy

Optic flow informs moving observers about their heading direction. Neurons in monkey medial superior temporal (MST) cortex show heading selective responses to optic flow and planar direction selective responses to patches of local motion. We recorded MST neuronal responses to a 90 x 90 degrees optic flow display and to a 3 x 3 array of local motion patches covering the same area. Our goal was t...

2007
David M. Johnson

Simulator Sickness (SS) is a form of Motion Sickness (MS) that does not require true motion – but does require a wide field of view (FOV) visual display [5, 46, 64]. Like all varieties of MS, an intact vestibular system is necessary to experience SS [12]. It has been called visually induced motion sickness [3, 52, 48] and Cinerama sickness [3, 5, 52]. The term “vection” is used to describe a vi...

Journal: :iranian journal of nuclear medicine 2005
arman rahmim

with the arrival of increasingly higher resolution pet systems, small amounts of motion can cause significant blurring in the images, compared to the intrinsic resolutions of the scanners. in this work, we have reviewed advanced correction methods for the three cases of (i) unwanted patient motion, as well as motions due to (ii) cardiac and (iii) respiratory cycles. for the first type of motion...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1387

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