Results 221 to 230 of about 358,049 (264)

The energy costs of energy

1976
All technical devices and constructions require an investment of money and energy before they can be built and begin to function. Most of them require further investments of money and energy throughout their useful life for maintenance and again at the end of their life for disposal of recycling.
Woodman, Trevor, Davis, Joan
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The energy cost of walking in children

Pfl�gers Archiv European Journal of Physiology, 2001
Size, morphology and motor skills change dramatically during growth and this probably has an effect on the cost of locomotion. In this study, the effects of age and speed on the energy expended while walking were determined during growth. The rate of oxygen consumption and carbon dioxide production were measured in 3- to 12-year-old children and in ...
De Jaeger, Dominique, Willems, Patrick, Heglund, Norman   +2 more
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The Energy Cost of Rickshaw Pulling

Ergonomics, 1978
Abstract Rickshaw pulling is an occupation prevalent in some parts of India and in certain other countries. Energy expenditures of the task under different operational conditions have been studied. The ergonomic features of the rickshaw have also been discussed.
S R, Datta, B B, Chatterjee, B N, Roy
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Energy Cost of Rehabilitation Calisthenics

Physical Therapy, 1979
This study examined the relationship between total energy cost and cardiac effort for a set of graded calisthenics that have been used in cardiac rehabilitation programs. Cardiac effort was quantified by calculating myocardial oxygen cost from the product of heart rate and systolic blood pressure.
L R, Amundsen, M, Takahashi, C A, Carter, D H, Nielsen   +3 more
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Energy Cost of Sexual Activity

Archives of Internal Medicine, 1970
To the Editor. —The article by Hellerstein and Friedman "Sexual Activity and the Postcoronary Patient" (Arch Intern Med 125: 987-999, 1970) deserves comment regarding the inferences about the energy cost of sexual activity. To assess the oxygen cost of sexual activity, the authors have used the heart rate during sexual intercourse and compared it with
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Total energy costs in ecosystems

Journal of Theoretical Biology, 1979
Abstract A micro and macro ecological system hypotheses and their associated theory of total (direct and indirect) energy cost have been proposed to explain the meaning of system growth and the steady state condition. Models have been proposed which can be used to test the hypotheses.
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Renewable Energy's Hidden Costs

Scientific American, 2013
The article discusses the hidden costs of renewable energy sources, such as solar and wind power, which includes graphs showing the amount of metals needed for renewable energy infrastructure, such as metal for growing rapeseed oil, nickel in wind power, and tin and silver in solar power.
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Energy Costs of Lactation

Annual Review of Nutrition, 1988
Prentice, A. M., Prentice, Ann
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Energy Cost of Disco Dancing

Research Quarterly for Exercise and Sport, 1982
Abstract The purpose of this study was to evaluate the energy cost of dancing in the conditions that prevail in disco clubs. To avoid any hindrance in the movements of the dancers, oxygen uptake was assessed by retroextrapolating the 02 recovery curve to time zero of recovery.
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Energy Cost of Ion Transport

1980
For a plant to survive in a saline environment it is necessary to have specific control of internal ion concentrations.
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