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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Impedance cardiograph for monitoring heart functions, and program for computing stroke volume and cardiac output from thoracic impedance changes during cardiac cycle
Cardiac response to chemotherapy after myocardial infraction and diagnostic methods of heart disease in man and animals
Cardiovascular changes in male students during tilt and negative pressure tests with bed rest studied from heart rate, blood pressure and leg volume measurements
White rat physiological processes while maintained on hypothermic cardiopulmonary bypass with small membrane type heart-lung machines
Bed rest effect on orthostatic tolerance of patients with acute myocardial infarction and without heart failure
Real time metabolic rate analysis of suited astronaut using heart rate and O methods during thermal vacuum and extravehicular mobility tests
Electrical stimulation effects of carotid sinus on sinus rate and atrioventricular conduction for vagi and sympathetic nerves interruption to heart in dogs
Circadian rhythm phase relationships between photoperiodism and heart rate, locomotor activity and deep body temperature /DBT/ in unrestrained monkeys
Pneumatic driving system for heart assist or total replacement pumps, discussing design features and performance characteristics
Ruby laser operating at 6943 angstroms at the heart of an electronic ranging system provides a highly accurate range measurement to an extremely small area.
System collects medical data directly from patients and permanently records and displays several parameters - electrocardiograph, electroencephalograph, heart rate, respiration rate, auscultatory blood pressure, leg circumference changes, body temperature, and time. Components and operation of the system are described.
Impedance cardiograph measurements of stroke volume, heart rate, and cardiac output changes in humans during postural tilt and pressure tests
Design and performance of miniaturized portable heart rate and electrocardiographic monitoring system for prolonged space flights
The ubiquitous automobile has played both the role of hero and villain during the course of its history. At the present time it is being cast as the villain with increasing frequency because it has been indicted as a major source of air pollution. It is just this characterization that is responsible for our renewed interest in the automobile. When we speak of the automobile as a source of air pollution, we really mean the heart of the automobile, the internal combustion engine. The prototype of the modern internal combustion engine was first successfully operated by Nicholas August Otto in 1876. In spite of its long history, the internal combustion engine is still poorly understood in terms of the details of the physical processes that take place during its operations. The internal combustion engine operates on what is known as the Otto cycle, and Otto cycle calculations have been with us for many years. The emphasis in earlier calculations was usually on the performance rather than on the pollution aspects. Performance characteristics can often be estimated reasonably accurately even with a considerable degree of simplification. We are interested in the pollution aspects of the internal combustion engine, and therefore the calculations must be performed with more care. Our extensive experience with equilibrium calculations places us in a position to carry out such careful calculations. We have just recently begun such an analysis, and its objective is the prediction of exhaust gas properties. I will describe our progress by first reviewing the Otto cycle, and then I will illustrate the effect of various assumptions on the calculated results.
Hypothalamus stimulus effects on sympathetic nerve activity to heart, spleen, kidney and leg skeletal muscle in anesthetized cats
Heart dimension measurement by miniature implantable ultrasonic sonomicrometer, describing system design and operation
Actoballistocardiography based on piezoelectricity for biorythmic activity, respiratory movements and heart rate of small animals
Serum calcium-digitalis synergism effect on dogs heart excitability, noting hypoxia role in arrhythmia production