Jeffrey D. Gee

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The authors consider whether SPECmarks, the figures of merit obtained from running the SPEC benchmarks under certain specified conditions, accurately indicate the performance to be expected from real, live work loads. Miss ratios for the entire set of SPEC92 benchmarks are measured. It is found that instruction cache miss ratios in general, and data cache(More)
1. Exposure of neurohaemal areas to solutions of elevated K concentration (above 40 HIM) causes a maximal release of diuretic hormone in Rhodmus prolixus and Glossina austeni. 2. An involvement of Ca in hormone release is indicated by the reduction caused by low concentrations of this cation (below 2 mM) or by the presence of Mn. 3. During prolonged(More)
Isolated Malpighian tubules of Glossina morsitans are able to transport sodium against its concentration gradient. Their rate of secretion is dependent on the sodium concentration of the bathing medium. Potassium must be present in the bathing solution for rapid secretion to be maintained, but it does not play an active role in fluid secretion. Lithium and(More)
After taking a blood meal, the tsetse fly Glossina austeni excretes the excess water and salts of the meal in approximately 30 min. During this period a volume of fluid equivalent to 80% of the unfed weight of the fly passes through the haemolymph, whose composition nevertheless remains almost constant. The fluid excreted has a higher sodium and lower(More)
The effects of three inhibitors of sodium transport on the secretion of fluid by the Malpighian tubules of Glossina morsitans have been observed. The cardiac glycoside, ouabain, affects neither the rate of secretion nor the sodium concentration of the fluid secreted when isolated tubules are bathed by solutions containing a range of sodium and potassium(More)
The rate of secretion of the Malpighian tubules of Glossina austeni is controlled by a diuretic hormone. This hormone is present in the nervous tissue of the fly together with a degradative enzyme that can be activated by boiling. It is demonstrated that the Malpighian tubules are able to destroy the diuretic hormone; they may therefore participate in the(More)
Vector processors have typically used vector registers, interleaved memory, and pipelined access to data to provide sufficient memory system performance. Caches have been used mainly for instructions and scalar data, while vectors are usually uncached, presumably partially because of the belief that there is insufficient vector locality in these workloads.(More)