نتایج جستجو برای: water and earth
تعداد نتایج: 16943378 فیلتر نتایج به سال:
So, you want to visit the CELSS farms here in Luna City? I’m a farmer in that facility, and I’d be happy to show them to you. Perhaps we can complete our visit before midnight, when the year 2020 begins. (Because the lunar day is 29.530589 Earth days long, we keep Greenwich Earth time here.) As a matter of fact, we can celebrate New Year’s Eve with a meal in the mess hall based almost entirely ...
Life, defined as a chemical system capable of transferring its molecular information via self-replication and also capable of evolving, must develop within a liquid to take advantage of the diffusion of complex molecules. On Earth, life probably originated from the evolution of reduced organic molecules in liquid water. Organic matter might have been formed in the primitive Earth's atmosphere o...
The orbital analysis of artificial Earth satellites have revealed the existence of a strong third harmonic in the gravitational potential of the Earth which gives its ‘pear-shape’ in the averaged meridional section. Various attempts to explain this pear-shape based on physical principles have proved to be inconclusive. In this study, a new approach based upon statistical correlation between var...
The speed of tsunami waves is typically calculated using the shallow-water 3 approximation over a rigid-body Earth. Recent comparisons of tsunami arrival 4 times from the March 11, 2011 tsunami suggest, however, that the standard for-5 mulation has errors around the one percent level, and it has been suggested that 6 the elasticity of the Earth can explain the discrepancy. While previous work h...
Hydrous melting driven by changes in H2O storage capacity may occur in a variety of settings in the mantle, including in oceanic basalt sources and in deeper regions above and below the transition zone. The 50–200 ppm H2O in the upper mantle likely derives from a blend of sources that may include residues of hydrous partial melting, either in the deep mantle and/or beneath arcs or oceanic islan...
the number of constructed dams has been largely increased due to high demands of water supplies, and earth dams are the most common types since they are more compatible to the environment. nevertheless, the stability of these important structures during earthquakes has to be carefully evaluated and guaranteed. in the past, earth dams usually designed with pure clay core, but in recent decades t...
This paper proposes a five-stage life cycle model to describe business development from birth to death with the five elements theory. A five-stage model, including birth, survival, success, decline, and renewal, is developed in terms of interactions of business functions, which are classified into the Chinese five elements. Each stage of the business life cycle could be characterized by the dif...
The dissolution rates of rare earth oxides and two types of rare earth containing functional materials into water, saline solution, and Gamble's fluid were measured in order to evaluate the biological effects of rare earth-containing functional materials. The tested materials were yttrium, lanthanum, cerium and neodymium oxides, and neodymium-boron-iron magnet alloy (NdBFe) and lanthanum-mish-m...
limitation of water resources in the earth has turned it as a valuable economic commodity. accordingly, the agricultural sector of which according to studies has the largest wasted water should be managed. therefore, it is advisable to use the application of methods and programming models such as the decision support system along with the abilities of gis in order to management of the water res...
the main purpose of this research was to analyze agricultural water management problems (awmp) in three contexts of: water source, water conveyance and at the farm level, in zarrindasht county, fars province. the research was carried out based on a survey method with a questionnaire compiled for collection of data. questionnaire's reliability was confirmed through a computation of cronbach...
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