Peter Weiss

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Using clinical and electrophysiologic measures, we evaluated the visual pathway of patients who had multiple sclerosis, 20/20 Snellen acuity, and no history of optic neuritis. Delayed latencies were found in the transient visual evoked potentials (VEPs) of 38% of the patients, and interocular latency differences were abnormal in 67%. Contrast VEPs were(More)
Reversing sine wave gratings were electronically swept in spatial frequency and contrast. The acuity limits and contrast thresholds of 4 observers were inferred from evoked potential stimulus-response functions elicited by these stimuli and retrieved with a quadrature lock-in amplifier. The evoked potential functions, linearized in the case of contrast by(More)
Nonuniform quantizers for just not visible reconstruction errors in an adaptive intra-/interframe DPCM scheme for component-coded color television signals are presented, both for conventional DPCM and for noise-shaping DPCM. Noise feedback filters that minimize the visibility of reconstruction errors by spectral shaping are designed for Y, R-Y, and BY. A(More)
Twelve subjects, nine with tobacco-alcohol amblyopia and three with nutritional amblyopia, were studied with pattern and flash visual-evoked potentials. We found abnormal steady-state responses in all 12 patients, including those with minor visual abnormalities, when the contrast of the stimulus was decreased. The latency of the first major positive wave(More)
The present study investigated the use of the Minnesota Multiphasic Personality Inventory (MMPI)-2 L (Lie) scale in the preemployment selection of police officers. In a prior article, Weiss, Davis, Rostow, and Kinsman (2003) found that high L scale scores are associated with a number of performance problems in law enforcement officers. These investigators(More)
In a prospective randomised study, 31 patients with an unruptured tubal pregnancy were treated either with local and systemic prostaglandins or with local instillation of a hyperosmolar glucose solution. Prostaglandin therapy was successful in 13 of 15 patients and glucose therapy in 16 of 16. 9 women treated with prostaglandins had cramping abdominal pains(More)
CAUGHT IN THE CROSSFIRE. In a step toward making an ultracold Fermi gas, a laser beam (light blue in diagram) traps a microscopic cloud of atoms (orange) at its focus. Such a trapping beam can be intense enough to cut steel. Login problems? Click here. Extreme physical conditions have a way of bringing out the strangest behaviors that nature can muster.(More)