scholarly journals Perceived duration of plaid motion increases with pattern speed rather than component speed

2012 ◽  
Vol 12 (4) ◽  
pp. 1-1 ◽  
Author(s):  
K. Yamamoto ◽  
K. Miura
Keyword(s):  
Plaid Motion ◽  
Pattern Speed ◽  
Perceived Duration

Stimulus expectation prolongs rather than shortens perceived duration: Evidence from self-generated expectations.

2018 ◽  
Vol 44 (1) ◽  
pp. 117-127 ◽  
Author(s):  
Teresa Birngruber ◽  
Hannes Schröter ◽  
Emanuel Schütt ◽  
Rolf Ulrich
Keyword(s):  
Perceived Duration

scholarly journals Speed or duration? Effects of implicit stimulus attributes on perceived duration

2021 ◽  
pp. 1-22
Author(s):  
Linda von Sobbe ◽  
Claudia Maienborn ◽  
Fabiola Reiber ◽  
Edith Scheifele ◽  
Rolf Ulrich
Keyword(s):  
Perceived Duration

Spatiotemporal predictability alters perceived duration of visual events: Memento effect revisited.

2015 ◽  
Vol 41 (3) ◽  
pp. 613-622
Author(s):  
Hauke S. Meyerhoff ◽  
Lucy D. Vanes ◽  
Markus Huff
Keyword(s):  
Visual Events ◽  
Perceived Duration

The Perceived Duration of Auditory and Visual Intervals: Cross-Modal Comparison and Interaction

1961 ◽  
Vol 74 (1) ◽  
pp. 17 ◽  
Author(s):  
Isaac Behar ◽  
William Bevan
Keyword(s):  
Perceived Duration

Spatial Effects on Temporal Categorisation

Perception ◽  
10.1068/p6165 ◽  
2009 ◽  
Vol 38 (5) ◽  
pp. 748-762 ◽  
Author(s):  
Marie-Ève Roussel ◽  
Simon Grondin ◽  
Peter Killeen
Keyword(s):  
Temporal Processing ◽  
Critical Role ◽  
Vertical Plane ◽  
Spatial Effects ◽  
Time Intervals ◽  
Spatial Factors ◽  
Upper Visual Field ◽  
Sensitivity Level ◽  
Marking Time ◽  
Perceived Duration

We examined the influence of spatial factors in temporal processing. Participants categorised as short or long empty intervals marked by two brief flashes delivered from locations differing in height and depth (experiment 1), or from two of three locations on a vertical plane (experiment 2). The perceived duration of intervals, as determined by the point of subjective equality, was affected by the height and depth of the signals (experiment 1). Experiment 2 showed that the point of fixation plays a critical role in perceived duration. The duration of an interval located in the upper visual field is perceived as longer when participants fixate the higher visual source and shorter when the fixation point is set in the middle; this latter result also generally applies when the fixation point is in the lower source. Finally, for the sensitivity level, there was a significant segment (upper versus lower) × direction (descending versus ascending) interaction in experiment 1; a similar interaction effect varied according to the fixation point in experiment 2. In experiment 2, the Weber fractions were around 0.22. Most results can be explained in terms of the need to shift attention from one visual source—for marking time intervals—to another.

scholarly journals Double X/Peanut Structures in Barred Galaxies – Insights from an N–body Simulation

2020 ◽  
Author(s):  
Bogdan C Ciambur ◽  
Francesca Fragkoudi ◽  
Sergey Khoperskov ◽  
Paola Di Matteo ◽  
Françoise Combes
Keyword(s):  
Dark Matter ◽  
Milky Way ◽  
Large Fraction ◽  
Formation Time ◽  
Dark Matter Halo ◽  
Barred Galaxies ◽  
Pattern Speed ◽  
Nearby Galaxies ◽  
Dynamical Instabilities ◽  
Bow Tie

Abstract Boxy, peanut– or X–shaped “bulges” are observed in a large fraction of barred galaxies viewed in, or close to, edge-on projection, as well as in the Milky Way. They are the product of dynamical instabilities occurring in stellar bars, which cause the latter to buckle and thicken vertically. Recent studies have found nearby galaxies that harbour two such features arising at different radial scales, in a nested configuration. In this paper we explore the formation of such double peanuts, using a collisionless N–body simulation of a pure disc evolving in isolation within a live dark matter halo, which we analyse in a completely analogous way to observations of real galaxies. In the simulation we find a stable double configuration consisting of two X/peanut structures associated to the same galactic bar – rotating with the same pattern speed – but with different morphology, formation time, and evolution. The inner, conventional peanut-shaped structure forms early via the buckling of the bar, and experiences little evolution once it stabilises. This feature is consistent in terms of size, strength and morphology, with peanut structures observed in nearby galaxies. The outer structure, however, displays a strong X, or “bow-tie”, morphology. It forms just after the inner peanut, and gradually extends in time (within 1 to 1.5 Gyr) to almost the end of the bar, a radial scale where ansae occur. We conclude that, although both structures form, and are dynamically coupled to, the same bar, they are supported by inherently different mechanisms.

Perceived duration of auditory oddballs: test of a novel pitch-window hypothesis

2018 ◽  
Vol 84 (4) ◽  
pp. 915-931 ◽  
Author(s):  
Elisa Kim Fromboluti ◽  
J. Devin McAuley
Keyword(s):  
Perceived Duration

Dynamical imprint of interstellar gas on persistence of spiral structure in galaxies

2017 ◽  
Vol 13 (S334) ◽  
pp. 296-297
Author(s):  
Soumavo Ghosh ◽  
Chanda J. Jog
Keyword(s):  
Time Scale ◽  
Spiral Structure ◽  
Density Wave ◽  
Disk Galaxies ◽  
Interstellar Gas ◽  
Spiral Arms ◽  
Pattern Speed

AbstractThe persistence of the spiral structure in disk galaxies has long been debated. In this work, we investigate the dynamical influence of interstellar gas on the persistence of the spiral arms in disk galaxies. We show that the gas helps the spiral arms to survive for longer time-scale (~ a few Gyr). Also, we show that the addition of gas in calculation is necessary for getting a stable density wave corresponding to the observed pattern speed of the spiral arms.

scholarly journals The duration aftereffect does not reflect adaptation to perceived duration

2019 ◽  
Vol 19 (10) ◽  
pp. 210c
Author(s):  
Chris Paffen ◽  
Jim Maarseveen ◽  
Frans AJ Verstraten ◽  
Hinze Hogendoorn
Keyword(s):  
Perceived Duration

scholarly journals CHAOS IN GROWING BAR MODELS

2019 ◽  
Vol 55 (2) ◽  
pp. 321-335
Author(s):  
Lucas Antonio Caritá ◽  
Irapuan Rodrigues ◽  
Ivânio Puerari ◽  
Luiz Eduardo Camargo Aranha Schiavo
Keyword(s):  
System Dynamics ◽  
Linear Growth ◽  
Rate Of Growth ◽  
Pattern Speed ◽  
The Stability

This paper aims to verify the influence of the bar, its pattern speed (Ω_b) and its rate of growth on the stability of the orbits in gravitational potentials. We studied the nature of the orbits in potentials representing galaxies with growing bars, where a linear growth was assumed. In order to study the stability of the orbits we applied SALI. We studied six models in which the bar dimensions were fixed, but we varied their pattern speed and time of bar growth. We found that when the bar growth is faster, more chaos is generated and we also noted that the higher the Ω_b, the greater its influence on the system dynamics. The initial positions of the orbits that became chaotic were located in a well-defined ring-like region, confined between the ILR and CR resonances. There was also an indication that the retrograde orbits, although much scarcer, are more conductive to chaos when they do exist.

Sign in / Sign up

Export Citation Format

Share Document