Results 251 to 260 of about 4,189,816 (303)
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Science, 1967
Dicke has interpreted his recent measurement of the sun's oblateness as implying a fast (1.8-day period) rotation of the solar radiative interior. We find that differentially rotating solar models, such as the one proposed by Dicke, are unstable. The rate of turbulent diffusion in the unstable regions of these models is so rapid that it appears to ...
Goldreich, Peter, Schubert, Gerald
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Dicke has interpreted his recent measurement of the sun's oblateness as implying a fast (1.8-day period) rotation of the solar radiative interior. We find that differentially rotating solar models, such as the one proposed by Dicke, are unstable. The rate of turbulent diffusion in the unstable regions of these models is so rapid that it appears to ...
Goldreich, Peter, Schubert, Gerald
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Sun Exposure and Melanomas on Sun-Shielded and Sun-Exposed Body Areas
2014Malignant melanoma is a tumor that arises from melanocytes and accounts for around 4% of all malignancies in Europe and Northern America and for about 11% in Australia and New Zealand. About 10% of primary melanomas arise from sites not exposed to sun. Acral lentiginous melanoma, mucosal melanoma (in the oral cavities, nasal sinuses, genital tract and ...
Asta, Juzeniene +2 more
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Journal of Scientific Instruments, 1925
The instrument described consists of a sundial geared to the hands of a clock and gives Greenwich mean time without observing a shadow or manipulating sliding scales. It is the invention of Professor W. E.
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The instrument described consists of a sundial geared to the hands of a clock and gives Greenwich mean time without observing a shadow or manipulating sliding scales. It is the invention of Professor W. E.
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Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2008
The nature of our star, the Sun, is dominated by its complex and variable magnetic fields. It is the purpose of this paper to review the fundamental nature of our magnetic Sun by outlining the most basic principles behind the way the Sun works and how its fields are generated, and to examine not only the historical observations of our magnetic star ...
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The nature of our star, the Sun, is dominated by its complex and variable magnetic fields. It is the purpose of this paper to review the fundamental nature of our magnetic Sun by outlining the most basic principles behind the way the Sun works and how its fields are generated, and to examine not only the historical observations of our magnetic star ...
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Ugeskrift for laeger, 1994
Protection against the sun in Denmark is only necessary from mid April to September. The number of erythema units may reach about 16 per day in the summer sun and about 50% of the biological active radiation is found between 12 a.m. and 3 p.m. (summertime).
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Protection against the sun in Denmark is only necessary from mid April to September. The number of erythema units may reach about 16 per day in the summer sun and about 50% of the biological active radiation is found between 12 a.m. and 3 p.m. (summertime).
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Scientific American, 1975
Observations of solar rotation are reviewed. There are two basic methods of determining the rotation of the sun. One is to measure the daily or monthly positions of tracers on the surface or in the corona, and the other is to measure line‐of‐sight velocities with the Doppler effect in spectrum lines.
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Observations of solar rotation are reviewed. There are two basic methods of determining the rotation of the sun. One is to measure the daily or monthly positions of tracers on the surface or in the corona, and the other is to measure line‐of‐sight velocities with the Doppler effect in spectrum lines.
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Science, 1980
Observations of 23 transits of Mercury in front of the sun between 1736 and 1973 show no indication of any significant change in the diameter of the sun. Regression analysis yields a decrease of the angular diameter, as viewed from the earth, of under 0.3 arc second per century (> 90 percent confidence limit).
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Observations of 23 transits of Mercury in front of the sun between 1736 and 1973 show no indication of any significant change in the diameter of the sun. Regression analysis yields a decrease of the angular diameter, as viewed from the earth, of under 0.3 arc second per century (> 90 percent confidence limit).
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Diogenes, 2003
It is more than a century since what we call the ‘history of religions’ was discovered and has been studied. But only recently have we realized that the ‘geography of religions’ is just as important. East and West are essential geopolitical categories, determined by cultural, historical and even religious differences: an Indian and a Swedish Catholic ...
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It is more than a century since what we call the ‘history of religions’ was discovered and has been studied. But only recently have we realized that the ‘geography of religions’ is just as important. East and West are essential geopolitical categories, determined by cultural, historical and even religious differences: an Indian and a Swedish Catholic ...
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Dermatology, 1975
Sunlight is the main environmental factor influencing human skin. The sun-light’s terrestrial spectrum is different from the extraterrestrial one, sunlight being changed by the filter effect of ozone and particles in the stratosphere and atmosphere. Attention is drawn to the influence of ‘supersonic transporters’ (SST) and chlorofluoromethanes on this ...
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Sunlight is the main environmental factor influencing human skin. The sun-light’s terrestrial spectrum is different from the extraterrestrial one, sunlight being changed by the filter effect of ozone and particles in the stratosphere and atmosphere. Attention is drawn to the influence of ‘supersonic transporters’ (SST) and chlorofluoromethanes on this ...
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