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The RADARSAT-2 mission comprises the construction, launch, and operation of Canada's second synthetic aperture radar earth observation spacecraft and the establishment of ground infrastructure to support the spacecraft and the data users. The RADARSAT-2 mission is being implemented in a partnership arrangement between government and private industry and(More)
BACKGROUND The restless legs syndrome (RLS) is a common neurologic disorder characterized by an irresistible urge to move the legs. It is a major cause of sleep disruption. Periodic limb movements in sleep are detectable in most patients with RLS and represent an objective physiological metric. METHODS To search for sequence variants contributing to RLS,(More)
Systems designs frequently call for a high voltage, low current power source that needs only minimal regulation. A few familiar examples are CRT circuits, electrostatic copiers, and photoflash applications. Required voltages typically range from 10 to 30 kV and the current demand rarely exceeds 5 milliamperes. When your design requires this type of power(More)
We describe a methodology for enabling an intelligent teaching system to make high level strategy decisions on the basis of low level student modeling information. This framework is less costly to construct, and superior to hand coding teaching strategies as it is more responsive to the learner's needs. In order to accomplish this, reinforcement learning is(More)
Ornithine decarboxylase (ODC) is considered the rate-limiting enzyme in polyamine biosynthesis, and an increase in putrescine after central nervous system (CNS) injury appears to be involved in neuronal death. Cerebral ischemia and reperfusion trigger an active series of metabolic events, which eventually lead to neuronal death. In the present study, ODC(More)
  • J Beck
  • 1989
AZT is now the standard of care for all persons with AIDS, ARC or T4 helper cell levels less than 200/mm3. Some authorities are cautiously recommending it with full informed consent for patients who have fewer than 400 mm3 T4 cells or who have sustained a rapid fall in helper cells coupled with new symptoms. The optimum dosage remains to be determined.(More)