William A. Segal

Learn More
In an effort to restore visual perception in retinal diseases such as age-related macular degeneration or retinitis pigmentosa, a design was recently presented for a high-resolution optoelectronic retinal prosthesis having thousands of electrodes. This system requires real-time image processing fast enough to convert a video stream of images into electrical(More)
Yield spreads on commercial mortgage-backed securities (CMBS) declined dramatically from 1992 until 1997, then increased each of the next two years. The relationship between CMBS yield spreads and other economic variables is estimated in an effort to determine the extent to which recent trends can be explained by other variables. The results indicate that(More)
Rhythmic oscillations throughout the cortex are observed during physiological and pathological states of the brain. The thalamus generates sleep spindle oscillations and spike-wave discharges characteristic of absence epilepsy. Much has been learned regarding the mechanisms underlying these oscillations from in vitro brain slice preparations. One widely(More)
A model of a monopolistic (GSE-dominated) market for mortgages is constructed in which the GSE employs a proprietary credit evaluation technology to produce a precise estimate of mortgage loan credit quality. When the private value of the information underlying the screening technology is sufficiently high, the GSE introduces noise in order to block(More)
The ability of polyribosomes, obtained from several bacterial species, to suppress the development of cutaneous SaD2 fibrosarcomas in DBA/2 mice was evaluated. Suppression of tumor appearance depended upon the tumor load at the time of treatment, dose of polyribosomes, and species source of polyribosomes, with Serratia marcescens being superior to(More)
  • 1