Joseph Weiner

Learn More
Recently there has been much interest in the hypothesis that competition between individual plants is asymmetric or onesided: larger individuals obtain a disproportionate share of the resources (for their relative size) and suppress the growth of smaller individuals. This has important implications for population structure, for the analysis of competition(More)
In near-field scanning optical microscopy, a light source or detector with dimensions less than the wavelength (lambda) is placed in close proximity (lambda/50) to a sample to generate images with resolution better than the diffraction limit. A near-field probe has been developed that yields a resolution of approximately 12 nm ( approximately lambda/43) and(More)
1. Changes in plasma concentrations of catecholamines and cortisol were measured before and after static exercise performed by the subject pushing with both legs against a strain-gauge bar. No marked changes in plasma catecholamine were observed but plasma cortisol increased after the subject pushed for 3 min at 50% of maximum force. 2. Holding a 20 kg(More)
The high incidence of heat stroke during the Mecca pilgrimage in hot weather prompted the development of a new method of rapidly cooling hyperpyrexial patients. A cooling bed was devised which achieved a high rate of evaporative cooling by spraying patients with water at 15 degrees C and warm air, which reached the body surface at 30-35 degrees C. The(More)
Physiological tests of work performance and measurement of field productivity were made in 194 Sudanese cane cutters in order to study the effect of Schistosoma mansoni infection. The cane cutters were selected from two age ranges (16-24 and 25-45 years) and subdivided into three clinical groups: not infected, infected with, and infected without clinical(More)
Eighteen hyperpyrexial patients with a mean rectal temperature of 42.3 degrees (range 41.2-43.1 degrees C) were rapidly cooled in a unit producing evaporative cooling from a warm skin. Sixteen patients recovered, and two, who were diabetic, died. The time taken for the core temperature to drop to 38 degrees C varied from 26 min to 5 h. The success of a(More)