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1.
Infrared spectroscopic observations of planets and Saturn's satellite Titan with the Infrared Space Observatory led to many
significant discoveries that improved our understanding on the formation, physics and chemistry of these objects. The prime
results achieved by ISO are: (1) a new and consistent determination of the D/H ratios on the giant planets and Titan; (2)
the first precise measurement of the 15N/14N ratio in Jupiter, a valuable indicator of the protosolar nitrogen isotopic ratio; (3) the first detection of an external
oxygen flux for all giant planets and Titan; (4) the first detection of some stratospheric hydrocarbons (CH3, C2H4, CH3C2H, C4H2, C6H6); (5) the first detection of tropospheric water in Saturn; (6) the tentative detection of carbonate minerals on Mars; (7)
the first thermal lightcurve of Pluto.
Based on observations with ISO, an ESA project with instruments funded by ESA Member States (especially the PI countries:
France, Germany, The Netherlands, and the United Kingdom), and with the participation of ISAS and NASA. 相似文献
2.
Thierry Dubois 《航空维修与工程》2020,(1):25-26
通常,使用民航退役或老龄飞机改装货机,是货运航空公司出于成本考虑的首选方案,但当前受电商行业持续繁荣的影响,货机改装过程中开始更加关注舱内容积而不是载重量,此外对舱内集装箱预留位多少以及装卸便利等要求更感兴趣。 相似文献
3.
Non-linear evolution of reconnection is too slow to explain-by itself-fast phenomena such as internal disruptions in tokamaks or flares in the solar atmosphere. It has been proposed that the change in topology could lead to field line stochastization, and hence to highly increased transport. An important objection to this idea is that the increase of transport coefficients should smoothly follow the amplitude of the perturbation, while the observations show a catastrophic transition. We have shown 1) that the shape of the structures (and not only their size or amplitude) evolve during non-linear evolution 2) that the stochastic threshold can be strongly influenced by the detailed shape. Therefore, sharp transitions can appear during the evolution, due to the combination of these two effects. We will first consider an idealized situation, namely the two-waves problem in slab geometry, for which we will study the effect of the separatrix shape on the stochastic threshold. In the second part, we will present an application to the internal disruption in tokamaks, with anm=1 perturbation in a toroidal magnetic configuration. In the last part, we will discuss possible applications of the studies on shape effects to the behaviour of trapped particles in structures of the solar atmosphere. 相似文献
4.
B. Biran F. de Schryver F. Dubois 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1988,8(12):133-136
A new type of differential interferometer based on holographic optical elements is developed, which allows the exact determination of a refractive index gradient field in two orthogonal directions. This interferometer will be used in TEXUS experiments to determine the temperature field in a convective liquid cell in which the temperature may be known at only one point. 相似文献
5.
Dubois K 《Acta Astronautica》1991,25(8-9):605-613
"Moderne dance" (as opposed to a more academic or classical dance form) uses techniques from kinesiology, anatomy and improvization which are adapted to a cultural, technological and political environment. The function of a choreographic system is to take and give a measure of the world. This includes, with the present tendency of the evolution of culture, a new "naturalism" which seeks the secrets of the body. Dance movements express in terms of space the dimension fo the infinite. It gives somehow the measure of a world within which everything is relative. Except for the speed of light, time and space are bound together by the same principle. The qualities of body awareness and specific motricity in dancers imply--besides a strict discipline--balance, coordination, muscular performance and perfect orientation, problems that astronauts also encounter in microgravity. Could chosen exercises used in modern dance technique be applied to the training of astronauts? Dancer-choreographer Kitsou Dubois has been working in this direction since 1988. She was granted a "Villa Medicis Hors Les Murs" by the French Ministry of Foreign Affairs, to carry on with her research at NASA, Houston, Tex. in April 1989. It allowed her to investigate the reality of this analogy. She intends to evaluate the dancers' subjective vertical refering to Mittelstaedt's observations on the proportional relationship between "space sickness" and some astronauts poor evaluation of the subjective vertical. This study should create a relationship between a choreographer's empirical intuition and a scientific reality. 相似文献
6.
K. Scha
fer L.V. Zasova D. Spa
nkuch E.A. Ustinov D. Oertel V.I. Moroz W. Do
hler V.M. Linkin R. Dubois J. Gu
ldner 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1987,7(12):17-24
Infrared spectra of Venus measured by means of the Fourier spectrometer aboard Venera 15 orbiter were used for retrievals of temperature profiles of the atmosphere in the altitude range from 60 to 95 km. Monotonous profiles are typical for latitudes lower than 60° latitude, but on the dayside near the equator some traces of the upper atmospheric inversion were found in the profiles. At latitudes greater than 60°N the profiles contain an isothermal or inversional part between 10 and 100 hPa pressure levels. Temperature profiles inside the “warm dipole” maxima are the same as outside of this region and consequently these optical properties should be explained only by peculiarities of cloud structure there. 相似文献
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André Balogh Andrei Bykov Peter Cargill Richard Dendy Thierry Dudok de Wit John Raymond 《Space Science Reviews》2013,178(2-4):77-80
With the maturing of space plasma research in the solar system, a more general approach to plasma physics in general, applied to cosmic plasmas, has become appropriate. There are both similarities and important differences in describing the phenomenology of space plasmas on scales from the Earth’s magnetosphere to galactic and inter-galactic scales. However, there are important aspects in common, related to the microphysics of plasma processes. This introduction to a coordinated collection of papers that address the several aspects of the microphysics of cosmic plasmas that have unifying themes sets out the scope and ambition of the broad sweep of topics covered in the volume, together with an enumeration of the detailed objectives of the coverage. 相似文献
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Thierry Dubois 《航空维修与工程》2020,(4):23-24
在当前新飞机交付放缓、燃油价格较低的新市场环境下,老旧飞机仍然是运输市场的主要参与者,而且多数运营商希望在最低的成本支出条件下提升这部分飞机的市场竞争力或者自身品牌竞争力,那么选择LED照明系统翻新或将是最直接、高效的方式之一。 相似文献