A computational model for the control of horizontal vergence, based on a population of disparity tuned complex cells, is presented. Since the population is able to extract the disparity map only in a limited range, using the map to drive vergence control means to limit its functionality inside this range. The model directly extracts the disparity-vergence response by combining the outputs of th...

In literatures two enhancement algorithms spatial and spatiotemporal homomorphic ltering SHF and STHF have been proposed for enhancement of the far infrared image based upon a far infrared imaging model Although spatiotemporal homomorphic lter ing may reduce the number of iterations greatly in comparison to spatial one for a similar degree of con vergence by making explicit use of the additiona...

Penelitian ini bertujuan untuk menentukan pendekatan teoritis yang tepat osilasi bandul nyata dengan simpangan sudut awal besar dan memperhitungkan faktor redaman udara. Rekaman video gerak dianalisis menggunakan software Tracker, mendapatkan data percobaan. Persamaan dimodelkan persamaan diferensial nonlinier orde dua linier, kuadrat pada tali bandul. diselesaikan metode Runge-Kutta Orde 4 kem...

Cyclic cows immunized against growth hormone-releasing factor (GRFi, n = 19), human serum albumin (HSAi, n = 10), or not immunized (CON, n = 18) were used to investigate the effects of feed restriction on serum and pituitary somatotropin (ST), pituitary ST mRNA, and serum and follicular IGF-I. Cows were either fed 2.7 kg/d cottonseed hulls (R) or given ad libitum access to feed (AL) for 15 d. O...

PURPOSE To examine gain, speed, and temporal characteristics of initial and closed-loop components of vergence eye movements in young and elderly subjects. METHODS Vergence eye movements in 13 elderly and 10 young adults were examined. A table with light-emitting diodes was used to elicit vergence starting from near (convergence, 40-20 cm; divergence, 20-40 cm) or from far (convergence, 150-4...

Disparity steps applied to large patterns elicit vergence eye movements at ultrashort latencies. Disparity tuning curves, describing the dependence of the amplitude of the initial vergence responses on the amplitude of the disparity steps, resemble the derivative of a gaussian and indicate that appropriate servo-like behavior occurs only with small disparity steps (<1 degree). Lesion data from ...

OBJECTIVE ADHD youth show poor oculomotor control. Recent research shows that attention-related eye vergence is weak in ADHD children. METHOD To validate vergence as a marker to classify ADHD, we assessed the modulation in the angle of vergence of children ( n = 43) previously diagnosed with ADHD while performing an attention task and compared the results with age-matched clinical controls ( ...

Neural mechanisms of attention allow selective sensory information processing. Top-down deployment of visual-spatial attention is conveyed by cortical feedback connections from frontal regions to lower sensory areas modulating late stimulus responses. A recent study reported the occurrence of small eye vergence during orienting top-down attention. Here we assessed a possible link between vergen...