Results 241 to 250 of about 7,300,385 (295)
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Journal of the Irrigation and Drainage Division, 1975
Energy inputs to irrigation are dramatically increasing as irrigated agriculture expands to meet world food demands and more sophisticated technologies are developed to increase water use efficiency. In this study nine irrigation systems, designed for a specific land area, are analyzed and the total energy inputs computed for each system.
J. Clair Batty +2 more
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Energy inputs to irrigation are dramatically increasing as irrigated agriculture expands to meet world food demands and more sophisticated technologies are developed to increase water use efficiency. In this study nine irrigation systems, designed for a specific land area, are analyzed and the total energy inputs computed for each system.
J. Clair Batty +2 more
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An Energy Combiner for a Multi-Input Energy-Harvesting System
IEEE Transactions on Circuits and Systems II: Express Briefs, 2015An energy combiner for delivering electrical energy harvested simultaneously from individual energy harvesters (EHs) to a single energy storage device such as a battery is presented. It is designed as a modular architecture to be handled as a subsystem and supports an arbitrary number of EHs, which can be connected to the energy combiner in a hot ...
Taewook Kang +4 more
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Nutritional Outputs and Energy Inputs in Seafoods
Science, 1977Energy used by U.S. ships in harvesting seafoods can vary by a factor of more than 100 when the seafoods are compared on the basis of their content of edible protein or line weight. This energy difference bears no relationship to the nutritive value of the food. When protein yield is compared, the energy to harvest some seafoods is in the same range as
, Rawitscher, J, Mayer
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Modelling Solar Energy Input in Greenhouses
Solar Energy, 1999A semi one-dimensional climate model was used to investigate the relative importance of the constructional parameters that influence the solar energy collecting efficiency of greenhouses under Western European conditions. Parameters investigated were the transmittance of the greenhouse frame, the radiometric properties of the greenhouse cladding and ...
J.G. Pieters, J.M. Deltour
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Climatic Change, 1991
We review the physical origin, spectral nature, energetics and known variability of all solar emanations: photons, particles and magnetic fields. Compared to a decade ago, our knowledge has greatly improved concerning variability in the total irradiance, as well as its EUV and UV components.
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We review the physical origin, spectral nature, energetics and known variability of all solar emanations: photons, particles and magnetic fields. Compared to a decade ago, our knowledge has greatly improved concerning variability in the total irradiance, as well as its EUV and UV components.
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Wages in a factor proportions model with energy input [PDF]
Economic Modelling, 2014 Abstract This paper examines US wage adjustment in a structural vector autoregression of the factor proportions model with capital, labor, and energy inputs. Data cover the years 1949 to 2006. The wage adjusts to changes in input levels and output prices over six to eight years. Energy has a more robust wage impact than capital.
Hyeongwoo Kim, Henry Thompson
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Input of Energy/Underwater Sound
2017Underwater sound is ubiquitous throughout the world’s oceans. Evaluating its impact and relevance for the marine fauna is highly complex and hampered by a paucity of data, lack of understanding and ambiguity of terms. When comparing sound (an energetic pollutant) with substantial pollutants (chemical, biological or marine litter) two notable ...
Olaf Boebel +2 more
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The Energy Input in Norwegian Forestry
Forest Science, 1983Abstract The purpose of this article is to determine the energy input per m³ in Norwegian forestry in the years 1948/49 and 1978/79 and to find operational methods that require little energy. The energy for production of 1 unit of each of the means of production in forestry has been computed.
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Bound of Earthquake Input Energy
Journal of Structural Engineering, 2004A new general critical excitation method is developed for a damped linear elastic single-degree-of-freedom structure. In contrast to prior studies considering amplitude nonstationarity only, no special constraint of input motions is needed on nonstationarity.
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1993
Active galactic nuclei pump substantial amounts of energy into their surroundings, in several forms. The direct action of radiation pressure, radiative heating of surrounding gas, and kinetic energy input through jets and winds may all play a role in modifying the environments of AGNs.
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Active galactic nuclei pump substantial amounts of energy into their surroundings, in several forms. The direct action of radiation pressure, radiative heating of surrounding gas, and kinetic energy input through jets and winds may all play a role in modifying the environments of AGNs.
openaire +1 more source