نتایج جستجو برای: atmosphere
تعداد نتایج: 54710 فیلتر نتایج به سال:
Luhmann et al. (1) and Jakosky et al. (2) showed that the Martian atmosphere was eroded (sputtered) by energetic O ions that are formed from escaping 0 and accelerated back into the atmosphere by the solar wind fields. This collisional ejection process appears to explain measured isotope ratios for Ar and N in the martian atmosphere (2, 3) and it may affect the early evolution of this atmospher...
Coupling between the lower and upper atmosphere, combined with loss of gas from the upper atmosphere to space, likely contributed to the thin, cold, dry atmosphere of modern Mars. To help understand ongoing ion loss to space, the Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft made comprehensive measurements of the Mars upper atmosphere, ionosphere, and interactions with the Sun and s...
Thermodynamic disequilibrium is a necessary situation in a system in which complex emergent structures are created and maintained. It is known that most of the chemical disequilibrium, a particular type of thermodynamic disequilibrium, in Earth’s atmosphere is a consequence of life. We have developed a thermochemical model for the Martian atmosphere to analyze the disequilibrium by chemical rea...
Introduction: The role of the family atmosphere in relation to public health of high school female students in Yazd. Family as a social system is with basic needs, like: Self-esteem, physical security, belonging and intimacy, dependency, responsibility, need to be motivated and approved by others, pointed out the need for happiness, success, and spiritual needs. Every family situation is unique...
Purpose: The present research aims to study the relationship between organizational atmosphere and organizational commitment in the public libraries of Mashhad city. Method: The present research is an applied descriptive survey research. The population is 117 librarians in the public libraries of Mashhad city. Data collection was done by questionnaires. The research questionnaire was designed ...
We solve the radiative transfer problem analytically in the anisotropic, plane-parallel atmosphere. Chandrasekhar formalized the radiative transfer process as a simultaneous, two-variable, non-linear, integral equation and obtained the analytical solution of the second approximation for the isotropic plane-parallel atmosphere. We obtain the second approximation for the anisotropic atmosphere, b...
Here we present high cadence photometry taken by the Acquisition Camera on Gemini South, of a close passage by the ∼ 540 km radius Kuiper Belt Object, (50000) Quaoar, of a r’=20.2 background star. Observations before and after the event show that the apparent impact parameter of the event was 0.019±0.004”, corresponding to a close approach of 580±120 km to the centre of Quaoar. No signatures of...
Observations of the 2007 March 18 occultation of the star P445.3 (2UCAC 25823784; R = 15.3) by Pluto were obtained at high time resolution at five sites across the western United States and reduced to produce light curves for each station using standard aperture photometry. Global models of Pluto’s upper atmosphere are fitted simultaneously to all resulting light curves. The results of these mo...
We living things are a late outgrowth of the metabolism of our Galaxy. The carbon that enters so importantly into our composition was cooked in the remote past in a dying star. From it at lower temperatures nitrogen and oxygen were formed. These, our indispensable elements, were spewed out into space in the exhalations of red giants and such stellar catastrophes as supernovae, there to be mixed...
The appearance of rogue waves is well known in oceanographics, optics, and coldmatter systems. Here we show a possibility for the existence of atmospheric rogue waves. Solitary waves in plasmas, and similarly in the atmosphere, have been thoroughly investigated during more than four decades [1]. Observations [2, 3] of atmospheric disturbances propagating with no appreciable change in structure ...
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