4,881 research outputs found
The 2D/3D dynamics of wall-bounded low-Rm magnetohydrodynamic (MHD) turbulence
No full textWith this experimental study, we give evidence that the dynamics of low-Rm MHD turbulence depends on the diffusion length l_z, which corresponds to the distance over which the Lorentz force is able to diffuse momentum before it is balanced by inertia
Eye movement control during a bimanual, high-speed sensorimotor task: From expertise to championship
No full textFoerster RM, Carbone E, Schneider WX. Eye movement control during a bimanual, high-speed sensorimotor task: From expertise to championship. Perception. 2011;40(Suppl. 1):57
Eye movements during and after automatization of a high-speed stacking task: From sensory-based to memory-based saccadic programming
No full textFoerster RM, Carbone E, Koesling H, Schneider WX. Eye movements during and after automatization of a high-speed stacking task: From sensory-based to memory-based saccadic programming. Journal of Vision. 2011;11(11):555
Scanpath similarity in sequential sensorimotor tasks: Comparing a sub-action sequenced linear distance method to string edit methods
No full textFoerster RM, Carbone E, Schneider WX. Scanpath similarity in sequential sensorimotor tasks: Comparing a sub-action sequenced linear distance method to string edit methods. Journal of Vision. 2012;12(9):1022-1022
Domain-specific interference between working memory retention and automatized real-world tasks
No full textFoerster RM, Carbone E, Schneider WX. Domain-specific interference between working memory retention and automatized real-world tasks. Presented at the Zif Conference "Task-driven control of thought and action by working memory: Linking mind and brain", Bielefeld
Sensorische und langzeitgedächtnisbasierte Aufmerksamkeitssteuerung: Augenbewegungen während sensomotorischen Lernens
No full textFoerster RM, Carbone E, Koesling H, Schneider WX. Sensorische und langzeitgedächtnisbasierte Aufmerksamkeitssteuerung: Augenbewegungen während sensomotorischen Lernens. Presented at the 48. Kongress der Deutschen Gesellschaft für Psychologie, Bielefeld, Germany
Saccadic eye movements in the dark while performing an automatized sequential high-speed sensorimotor task
No full textFoerster RM, Carbone E, Koesling H, Schneider WX. Saccadic eye movements in the dark while performing an automatized sequential high-speed sensorimotor task. Journal of Vision. 2012;12(2)(8):1-15.Saccades during object-related everyday tasks select visual information to guide hand movements. Nevertheless, humans can perform such a task in the dark provided it was automatized beforehand. It is largely unknown whether and how saccades are executed in this case. Recently, a long-term memory (LTM)-based direct control mode of attention during the execution of well-learned sensorimotor tasks, which predicts task-relevant saccades in the dark, was proposed (R. M. Foerster, E. Carbone, H. Koesling, & W. X. Schneider, 2011). In the present study, participants performed an automatized speed-stacking task in the dark and in the light while their eye movements were recorded. Speed stacking is a sequential high-speed sensorimotor object manipulation task. Results demonstrated that participants indeed made systematic eye movements in the dark. Saccadic scan paths and the number of fixations were highly similar across illumination conditions, while fixation rates were lower and fixation durations were longer in the dark. Importantly, the eye reached a location ahead of the hands even in the dark. Finally, neither eye–hand dynamics nor saccade accuracy correlated with hand movement durations in the dark. Results support the hypothesis of an LTM-based mode of attention selection during the execution of automatized sequential high-speed sensorimotor tasks
Triangular Constellations in Flows
No full textParticles advected on the surface of a fluid can exhibit fractal clustering. The local structure of a fractal set is described by its dimension , which is the exponent of a power-law relating the mass in a ball to its radius : . It is desirable to characterise the {\em shapes} of constellations of points sampling a fractal measure, as well as their masses. The simplest example is the distribution of shapes of triangles formed by triplets of points, which we investigate for fractals generated by chaotic dynamical systems. The most significant parameter describing the triangle shape is the ratio of its area to the radius of gyration squared. We show that the probability density of has a phase transition: is independent of and approximately uniform below a critical flow compressibility , which we estimate. For the distribution appears to be described by two power laws: when , and when
Scanpath similarity in real-world tasks. A sub-action sequenced linear distance method
No full textFoerster RM, Carbone E, Koesling H, Schneider WX. Scanpath similarity in real-world tasks. A sub-action sequenced linear distance method. Presented at the ZiF Conference "Eye Tracking Methods and Scan Path Analysis", Bielefeld
Eye movements of experts and champions in a high-speed sensorimotor task in the dark: Evidence for LTM driven saccades
No full textFoerster RM, Carbone E, Koesling H, Schneider WX. Eye movements of experts and champions in a high-speed sensorimotor task in the dark: Evidence for LTM driven saccades. Journal of Eye Movement Research. 2011;4(3):114-114
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