Determination of nonlinear transfer characteristics (Wiener kernels) of cells in the visual system of insects

1975 ◽  
Vol 62 (4) ◽  
pp. 186-187 ◽  
Author(s):  
H. Eckert
Keyword(s):  
Visual System ◽  
Wiener Kernels ◽  
Transfer Characteristics ◽  
Nonlinear Transfer

Efficient and accurate determination of the transfer characteristics of vehicle bodies

ATZ worldwide ◽  
2009 ◽  
Vol 111 (11) ◽  
pp. 20-26
Author(s):  
Franz K. Brandl ◽  
Stephan Brandl ◽  
Robert Höldrich ◽  
Alois Sontacchi ◽  
Hans H. Priebsch
Keyword(s):  
Accurate Determination ◽  
Transfer Characteristics ◽  
Vehicle Bodies

Visual Acuity Affected by Size Perception Based on Convergence Cue

Perception ◽  
1997 ◽  
Vol 26 (1_suppl) ◽  
pp. 354-354
Author(s):  
H Shinoda ◽  
M Ikeda
Keyword(s):  
Visual Acuity ◽  
Visual System ◽  
Retinal Image ◽  
White Paper ◽  
Retinal Size ◽  
Size Perception ◽  
Convergence Angle ◽  
Threshold Size

Increasing (or decreasing) the convergence angle can shrink (or expand) the perceived size of an object without changing its retinal size (Oyama, 1974 Perception & Psychophysics16 175 – 182). Here we address the question whether such a change in perceived size affects visual acuity. We investigated the effects of perceived size on the legibility of letters, using a telestereoscope consisting of four mirrors to control the observer's convergence angle while keeping the size of the retinal image constant. The targets were photocopies of ordinary Japanese books containing both types of Japanese characters, kana and kanji. The former is a phonetic character and simpler than the latter. Letters were printed in black on white paper. First, we demonstrated that letters do become more legible (illegible) as perceived size expands (shrinks), although their retinal size does not change. Then, we measured the size of the convergence angle at which letters became legible. The ‘threshold’ size of the convergence angle was obtained for several retinal sizes (0.1 to 0.2 deg) of letters, and for kana and kanji, respectively. Four subjects participated in the experiment. The result shows that the threshold convergence angle for legibility decreases as the retinal size of letters decreases, so that the minimum retinal size of legible letters depends linearly on the convergence angle. The results implicate contributions from higher levels of the visual system to the determination of visual acuity.

Heat Transfer Characteristics of a Radial Jet Reattachment Flame

1997 ◽  
Vol 119 (2) ◽  
pp. 258-264 ◽  
Author(s):  
J. W. Mohr ◽  
J. Seyed-Yagoobi ◽  
R. H. Page
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Combustion Process ◽  
Local Heat ◽  
Operating Conditions ◽  
Recirculation Region ◽  
Heat Transfer Characteristics ◽  
Transfer Characteristics ◽  
Impingement Surface

A Radial Jet Reattachment Combustion (RJRC) nozzle forces primary combustion air to exit radially from the combustion nozzle and to mix with gaseous fuel in a highly turbulent recirculation region generated between the combustion nozzle and impingement surface. High convective heat transfer properties and improved fuel/ air mixing characterize this external mixing combustor for use in impingement flame heating processes. To understand the heat transfer characteristics of this new innovative practical RJRC nozzle, statistical design and analysis of experiments was utilized. A regression model was developed which allowed for determination of the total heat transfer to the impingement surface as well as the NOx emission index over a wide variety of operating conditions. In addition, spatially resolved flame temperatures and impingement surface temperature and heat flux profiles enabled determination of the extent of the combustion process with regards to the impingement surface. Specifically, the relative sizes of the reaction envelope, high temperature reaction zone, and low temperature recirculation zone were all determined. At the impingement surface in the reattachment zone very high local heat flux values were measured. This study provides the first detailed local heat transfer characteristics for the RJRC nozzle.

Variable Nonlinear Transfer Characteristics of MSLM

1990 ◽  
Vol 29 (Part 2, No. 8) ◽  
pp. L1529-L1532 ◽  
Author(s):  
Yuji Kobayashi ◽  
Tsutomu Hara ◽  
Yoshiji Suzuki
Keyword(s):  
Transfer Characteristics ◽  
Nonlinear Transfer

Transfer characteristics of excitation and inhibition in the human visual system.

1970 ◽  
Vol 33 (2) ◽  
pp. 285-292 ◽  
Author(s):  
A Fiorentini ◽  
L Maffei
Keyword(s):  
Visual System ◽  
Human Visual System ◽  
Transfer Characteristics
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