Results 271 to 280 of about 4,483,704 (311)
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2020
The study of Earth as an object whose history can be understood by application of physical laws dates back 200 years. This tradition is, however, rife with missteps related to as yet undiscovered physics or fundamentally incorrect assumptions. While the former is unavoidable, the latter amounts to self-inflicted wounds that may have forestalled ...
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The study of Earth as an object whose history can be understood by application of physical laws dates back 200 years. This tradition is, however, rife with missteps related to as yet undiscovered physics or fundamentally incorrect assumptions. While the former is unavoidable, the latter amounts to self-inflicted wounds that may have forestalled ...
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The thermal evolution of sporopollenin
Organic Geochemistry, 2000Abstract Micro Fourier-Transform Infrared (FT–IR) spectroscopy in combination with transmitted and reflected light microspectrophotometry relates the chemical and physical properties of sporopollenin during thermal maturation; the physical properties measured being colour, as the chromaticity coordinates a *, b * and L *, (luminance) and the ...
Yule, B.L. +2 more
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On the thermal evolution of Venus
Journal of Geophysical Research: Planets, 1994Several models are calculated in order to assess the effects of different physical parameters on the thermal evolution of Venus. The models are based on three‐dimensional thermal convection calculations in an incompressible mantle of infinite Prandtl number using a modified Boussinesq approximation.
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Advances in Space Research, 2006
Abstract The thermal regime of a small celestial body, Kuiper Belt object (20000) Varuna, is considered in the process of its formation by accretion of the protoplanet cloud material as well as during its further evolution up to the present time. We have simulated different formation scenarios of Varuna by varying the accretion time, accretion rate ...
O.B. Shchuko +3 more
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Abstract The thermal regime of a small celestial body, Kuiper Belt object (20000) Varuna, is considered in the process of its formation by accretion of the protoplanet cloud material as well as during its further evolution up to the present time. We have simulated different formation scenarios of Varuna by varying the accretion time, accretion rate ...
O.B. Shchuko +3 more
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Thermal evolution of ferromagnetic metallic glasses
Journal of Thermal Analysis and Calorimetry, 2003A traditional TG apparatus was modified by placing two permanent magnets producing a controlled magnetic field (TG(M): Magneto Thermogravimetry). This technique proved to be useful to study both structural relaxation and crystallisation of ferromagnetic metallic glasses.
G. LUCIANI +4 more
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Evolution of thermal sensitivity of ectotherm performance
Trends in Ecology & Evolution, 1989Most ectothermal animals have variable body temperatures. Because physiological rates are temperature sensitive, an ectotherm's behavioural and ecological performance - even its fitness - can be influenced by body temperature. As a result, the thermal sensitivity of ectotherm performance is relevant to diverse issues in physiology, ecology and ...
R B, Huey, J G, Kingsolver
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Coupled Orbital and Thermal Evolution of Ganymede
Icarus, 1997We explore the hypothesis that passage through an eccentricity-pumping resonance could lead to the resurfacing of Ganymede. To do so, we couple R. Malhotra's (1991, Icarus 94, 399–412) orbital model for the tidal evolution of the Laplace resonance to an internal model of Ganymede.
Showman, Adam P. +2 more
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Thermal Evolution of Kaolinite
2013Methods used by various investigators for ascertaining thermal decomposition of kaolinite are chronologically submitted in a comprehensive manner and then a summary is given.
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On the thermal evolution of the earth
Earth and Planetary Science Letters, 1980The two principal contributions to the surface heat flow of the earth are the cooling of the earth and the heat production of radioactive isotopes. As the rate of heat production decreases with time the temperature of the interior of the earth also decreases.
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Thermal force approach to molecular evolution
Physical Biology, 2004Recent experiments are discussed where temperature gradients across mesoscopic pores are shown to provide essential mechanisms for autonomous molecular evolution. On the one hand, laminar thermal convection can drive DNA replication as the molecules are continuously cycled between hot and cold regions of a chamber. On the other hand, thermophoresis can
Dieter, Braun, Albert, Libchaber
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