Group movement produced by the short-range process

J. Timothy Petersik

doi:10.3758/bf03207073

Theoretical and methodological approaches to apparent movement of short-range process and pattern perception

Behavior Research Methods Instruments &amp Computers ◽

10.3758/bf03201427 ◽

1986 ◽

Vol 18 (6) ◽

pp. 542-550 ◽

Cited By ~ 1

Author(s):

Jih Jie Chang

Keyword(s):

Short Range ◽

Apparent Movement ◽

Pattern Perception ◽

Methodological Approaches ◽

Range Process

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Failure to find an absolute retinal limit of a putative short-range process in apparent motion

Vision Research ◽

10.1016/0042-6989(83)90181-5 ◽

1983 ◽

Vol 23 (12) ◽

pp. 1663-1670 ◽

Cited By ~ 21

Author(s):

J. Timothy Petersik ◽

Randall Pufahl ◽

Elizabeth Krasnoff

Keyword(s):

Apparent Motion ◽

Short Range ◽

Range Process

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Dependence of Apparent Movement of a Subjective Figure on the Perceptual Fate of Inducing Elements

Perception ◽

10.1068/p160453 ◽

1987 ◽

Vol 16 (4) ◽

pp. 453-459 ◽

Cited By ~ 2

Author(s):

J Timothy Petersik

Keyword(s):

Long Range ◽

Short Range ◽

Apparent Movement ◽

Subjective Figure ◽

Range Process

In a series of demonstrations, two stimulus frames that contained subjective figures were alternated. It is shown that the perception of apparent movement of a subjective figure depends upon the configuration of the inducing stimuli and whether or not conditions of presentation favor the short-range or long-range process in apparent movement. Those conditions that favor the long-range process result in global apparent movement of the subjective figure. However, those conditions that favor the short-range process may prevent apparent movement of the subjective figure, or may result in a kind of apparent movement that is qualitatively different from that seen when similar physical contours are alternated. These results are interpreted in terms of the assumed differences between the short-range and long-range processes.

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Global cooperativity of the short-range process in apparent movement: Evidence obtained with contour-containing stimuli

Perception & Psychophysics ◽

10.3758/bf03210876 ◽

1990 ◽

Vol 47 (4) ◽

pp. 360-368 ◽

Cited By ~ 6

Author(s):

J. Timothy Petersik

Keyword(s):

Short Range ◽

Apparent Movement ◽

Range Process

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A short-range process in apparent motion

Vision Research ◽

10.1016/0042-6989(74)90041-8 ◽

1974 ◽

Vol 14 (7) ◽

pp. 519-527 ◽

Cited By ~ 642

Author(s):

Oliver Braddick

Keyword(s):

Apparent Motion ◽

Short Range ◽

Range Process

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Temporal Properties of the Short-Range Process in Apparent Motion

Perception ◽

10.1068/p140181 ◽

1985 ◽

Vol 14 (2) ◽

pp. 181-192 ◽

Cited By ~ 97

Author(s):

Curtis L Baker ◽

Oliver J Braddick

Keyword(s):

Motion Perception ◽

Apparent Motion ◽

Motion Detection ◽

Interstimulus Interval ◽

Short Range ◽

Time Interval ◽

Optimal Motion ◽

Temporal Properties ◽

Range Process

A study is reported of the perception of random-dot two-frame apparent motion in which the durations of each exposure and the interstimulus interval between them were varied. The results are largely consistent with the rule that, for optimal motion detection, a portion of each exposure must fall within the same time interval of about 40 ms. In addition, motion perception is separably dependent on the displacement from one exposure to the next and on the time interval between those exposures, rather than on the ‘velocity implied by their ratio.

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Domain coarsening by grain boundary migration in ordered Ni4Mo

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100144279 ◽

1986 ◽

Vol 44 ◽

pp. 560-561

Author(s):

K. Vasudevan ◽

H. P. Kao ◽

C. R. Brooks ◽

E. E. Stansbury

Keyword(s):

Grain Boundary ◽

Grain Boundaries ◽

Short Range ◽

Boundary Migration ◽

Grain Boundary Migration ◽

Rapid Cooling ◽

Temperature Range ◽

Fee Structure ◽

Domain Coarsening ◽

Boundary Reaction

The Ni4Mo alloy has a short-range ordered fee structure (α) above 868°C, but transforms below this temperature to an ordered bet structure (β) by rearrangement of atoms on the fee lattice. The disordered α, retained by rapid cooling, can be ordered by appropriate aging below 868°C. Initially, very fine β domains in six different but crystallographically related variants form and grow in size on further aging. However, in the temperature range 600-775°C, a coarsening reaction begins at the former α grain boundaries and the alloy also coarsens by this mechanism. The purpose of this paper is to report on TEM observations showing the characteristics of this grain boundary reaction.

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Ordering in Ni4Mo by TEM and APFIM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010012597x ◽

1987 ◽

Vol 45 ◽

pp. 214-215

Author(s):

E.A. Kenik ◽

T.A. Zagula ◽

M.K. Miller ◽

J. Bentley

Keyword(s):

Electron Irradiation ◽

Low Temperatures ◽

Short Range ◽

Atom Probe ◽

Range Order ◽

Considerable Time ◽

Probe Field ◽

Disordered Phase ◽

Transmission Electron ◽

Diffraction Patterns

The state of long-range order (LRO) and short-range order (SRO) in Ni4Mo has been a topic of interest for a considerable time (see Brooks et al.). The SRO is often referred to as 1½0 order from the apparent position of the diffuse maxima in diffraction patterns, which differs from the positions of the LRO (D1a) structure. Various studies have shown that a fully disordered state cannot be retained by quenching, as the atomic arrangements responsible for the 1½0 maxima are present at temperatures above the critical ordering temperature for LRO. Over 20 studies have attempted to identify the atomic arrangements associated with this state of order. A variety of models have been proposed, but no consensus has been reached. It has also been shown that 1 MeV electron irradiation at low temperatures (∼100 K) can produce the disordered phase in Ni4Mo. Transmission electron microscopy (TEM), atom probe field ion microscopy (APFIM), and electron irradiation disordering have been applied in the current study to further the understanding of the ordering processes in Ni4Mo.

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