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51.
Abrams M. Doraswamy N. Mathur A. 《Parallel and Distributed Systems, IEEE Transactions on》1992,3(6):672-685
Chitra analyzes a program execution sequence (PES) collected during execution of a program and produces a homogeneous, semi-Markov chain model fitting the PES. The PES represents the evolution of a program state vector in time. Therefore Chitra analyzes the time-dependent behavior of a program. The authors describe a set of transforms that map a PES to a simplified PES. Because the transforms are program-independent. Chitra can be used with any program. Chitra provides a visualization of PESs and transforms, to allow a user to visually guide transform selection in an effort to generate a simple yet accurate semi-Markov chain model. The resultant chain can predict performance at program parameters different than those used in the input PES, and the chain structure can diagnose performance problems 相似文献
52.
Michael J. Abrams Anne B. Kahle Frank D. Palluconi John P. Schieldge 《Remote sensing of environment》1984,16(1):13-33
In the past, remote sensing from aircraft and satellite for geologic mapping concentrated on the visible and reflective infrared parts of the spectrum, because of the availability of Landsat and aircraft multispectral scanners operating in this spectral range. With the launch of the Heat Capacity Mapping Mission (HCMM) satellite, regional thermal image data also became available. We have examined the HCMM data for geologic information over two desert areas in southern California, the Trona area and the Pisgah area. Three techniques were used for displaying and combining thermal data and visible and near infrared, including color additive composites, principal components, and calculation of thermal inertia images. Use of the color additive composite image was simplest and allowed for simultaneous display of both thermal and reflectance properties. Thermal data were found to provide additional geologic information, unavailable from Landsat data or from aircraft visible and near-infrared data alone. The addition of these data relating to thermal properties allowed separation of rock types with differing thermal properties but with similar reflectance characteristics. 相似文献
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Niaura Raymond; Brown Richard A.; Goldstein Michael G.; Murphy Joseph K.; Abrams David B. 《Canadian Metallurgical Quarterly》1996,4(3):285
A 4-week trial tested the effects of 4 doses (placebo, 0.1 mg/d, 0.2 mg/d, and 0.3 mg/d) of transdermal clonidine on smoking cessation and nicotine withdrawal. After a 1-week baseline, smokers (N?=?72) started the drug and tried to quit by Week 3. Significantly fewer smokers who received a placebo were abstinent at 5 days after quitting as compared with smokers who received clonidine at any dose (19% vs 57%, respectively, p?=?.007). Blood clonidine concentration interacted with nicotine dependence (p? 相似文献
55.
An acute intraperitoneal injection of ethanol (0.7 or 2.1g/kg body wt.) causes the reversible, dose-dependent accumulation of hepatic triglyceride in rats. By using a pulse of [14C]palmitate injected into a tail vein, it was found that ethanol (2.1g/kg)had no effect on the flux of unesterified fatty acid of serum (4.3mumol/min per 100g body wt.). However, either dose increased the fraction of the total flux going to liver from 0.16 to0.27 as rapidly as could be measured (30s), and it remained elevated until all ethanol had been cleared from the blood. The fraction of the total radioactivity in lipids of liver that was in triglyceride increased linearly for 1 h from 30 to 50% and there was a simultaneous decrease in phospholipid from 60 to 40%. The rate of synthesis of hepatic triglyceride derived directly from unesterified fatty acid of serum was calculated by using the flux rate of unesterified fatty acid in serum, the fractional hepatic uptake of this flux, and the percentage of liver fatty acid esterified to triglyceride. This contribution is related to the total synthetic rate of hepatic triglyceride (rate of accumulation+rate of release) to determine quantitatively how much of the developing fatty liver is attributable to increased uptake of unesterfied fatty acid of serum. At the higher dose of ethanol, about half of the accumulating triglyceride is derived from this source, whereas with the lower dose of ethanol it can account for all of the build-up. 相似文献
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Plasma progestins, estradiol, and luteinizing hormone following prostaglandin F2 alpha injection 总被引:1,自引:0,他引:1
JR Chenault WW Thatcher PS Kalra RM Abrams CJ Wilcox 《Canadian Metallurgical Quarterly》1976,59(7):1342-1346
Dairy animals, ranging from days 8 to 13 of the estrous cycle, were fitted with indwelling jugular catheters 1 day prior to either intramuscular injection of prostaglandin F2alpha free acid (30 mg, n=4) or intrauterine deposition of prostaglandin F2alpha free acid (10 mg, n = 3). Blood samples were collected at 6, 4, 2, and 0 h prior to administration of prostaglandin F2alpha and at 1, 3, and every 2 h thereafter until ovulation. Progestins, estradiol, and luteinizing hormone in plasma were measured by radioimmunoassay. Hormonal changes and interrelationships within animals were evaluated by least squares analyses. Decreases in progestins of plasma within 24 h indicated prostaglandin F2alpha induced luteolysis in six of the seven animals. Estradiol increased linearly from time of injection to 52 h postinjection. Intervals from administration of prostaglandin to onset of estrus, peak of luteinizing hormone, and ovulation were 74.9 +/- 21, 78.8 +/- 21, and 99.5 +/- 19 h. 相似文献
58.
P Schulman DR Budman V Vinciguerra L Weiselberg S Abrams T Degnan 《Canadian Metallurgical Quarterly》1982,66(1):171-172
A role for vinblastine (VBL) in lung cancer has never been clearly defined. Because of recent pharmacokinetic data suggesting a biweekly schedule for VBL and recent antitumor activity shown for vindesine, a phase II trial of divided-dose VBL was initiated. Among 22 evaluable patients, a 27% major response rate was seen, with a median duration of 5.5 months (range 3.5-12+). The major toxic effect was myelosuppression but was easily manageable and tolerated. These results suggest schedule dependency for VBL and open the question of its efficacy in lung cancer. 相似文献
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