An analysis of the spectrophotometric and photometric observations of comets 1967II, 1968I, 1968V,and 1968VI     

Amaury A. De Almeida 《Earth, Moon, and Planets》1991,53(3):205-216

Emission fluxes of CN, C₂ and C₃ carbon-bearing molecular species observed in the coma of comets Rudnicki (1967II), Ikeya-Seki (1968I), Whitaker-Thomas (1968V), and Honda (1968VI) are analysed in the framework of Haser model. CN, C₃ and C₃ production rates are determined using recently derived fluorescence efficiencies. The dependence of CN, C₂ and C₃ production rates on the heliocentric distance and the possible correlations among these radicals is studied. It is shown that comets Ikeya-Seki (1968I) and Honda (1968VI) have the same mean color indices (B-V) and (U-B).  相似文献   

Modulation of ionospheric conductivities during high-power wave propagation     

S. S. De  B. K. Sarkar  B. Ghosh  A. C. Sen  S. Bandyopadhyay  S. K. Adhikari 《Earth, Moon, and Planets》1991,53(1):1-10

Enhancement of conductivity tensor modification within the ionospheric plasma by electron density modulation through the temperature dependence of the recombination rates of different ionspecies caused due to electron temperature modulation during high-power wave propagation is studied. Variation of Hall and Pedersen conductivities of the ionosphere has been investigated in the height range between 85 km to 250 km. The generation of waves at the modulation frequency and its harmonics in the ELF, VLF bands in the process is discussed.  相似文献   

Radial-orbit instability of a family of anisotropic Hernquist models with and without a supermassive black hole     

P. Buyle  E. Van Hese  S. De Rijcke  H. Dejonghe 《Monthly notices of the Royal Astronomical Society》2007,375(4):1157-1170

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The 2dF Galaxy Redshift Survey: the luminosity function of cluster galaxies     

Roberto De Propris  Matthew Colless  Simon P. Driver  Warrick Couch  John A. Peacock  Ivan K. Baldry  Carlton M. Baugh  Joss Bland-Hawthorn  Terry Bridges  Russell Cannon  Shaun Cole  Chris Collins  Nicholas Cross  Gavin B. Dalton  George Efstathiou  Richard S. Ellis  Carlos S. Frenk  Karl Glazebrook  Edward Hawkins  Carole Jackson  Ofer Lahav  Ian Lewis  Stuart Lumsden  Steve Maddox  Darren S. Madgwick  Peder Norberg  Will Percival  Bruce Peterson  Will Sutherland  Keith Taylor 《Monthly notices of the Royal Astronomical Society》2003,342(3):725-737

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The island wind–buoyancy connection     

AGATHA M. De BOER †  DORON NOF ‡ 《地球，A辑:动力气象学与海洋学》2005,57(5):783-797

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A model for pore‐fluid‐sensitive rock behavior using a weathering state parameter     

R. J. Hickman  M. S. Gutierrez  V. De Gennaro  P. Delage 《国际地质力学数值与分析法杂志》2008,32(16):1927-1953

Chalk and other porous rocks are known to behave differently when saturated with different pore fluids. The behavior of these rocks varies with different pore fluids and additional deformation occurs when the pore fluid composition changes. In this article, we review the evidence that behavior in porous rocks is pore‐fluid‐dependent, present a constitutive model for pore‐fluid‐dependent porous rocks, and present a compilation of previously published data to develop quantitative relationships between various pore fluids and mechanical behavior. The model proposed here is based on a state parameter approach for weathering and has similarities to models previously proposed for weathering‐sensitive rocks in that the values for parameters that characterize material behavior vary as a function of weathering. Comparisons with published experimental data indicate that the model is capable of reproducing observed behavior of chalk under a variety of loading conditions and changes in pore fluid composition. Copyright © 2008 John Wiley & Sons, Ltd.  相似文献   

Haser model CN,C2 and C3 production rates in some comets     

A. A. De Almeida  P. D. Singh  C. M. Burgoyne 《Earth, Moon, and Planets》1989,47(1):15-31

Emission fluxes of CN, C₂ and C₃ species observed in the coma of some comets are analysed in the framework of Haser model. CN, C₂ and C₃ production rates are determined using recently derived fluorescence efficiencies and dependence of CN, C₂ and C₃ production rates on the heliocentric distance is studied. Evidence for a burst type activity around January 15, 1974 in the post-perihelion period of comet Kohoutek (1973f) is observed.  相似文献   

Book reviews     

V. Lorenz  S. De la Cruz-Reyna 《Bulletin of Volcanology》1989,51(4):311-312

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Le volcanisme en Côte Française des Somalis     

E. Aubert De La Rüe 《Bulletin of Volcanology》1939,5(1):71-108

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The trispectrum of the cosmic microwave background on subdegree angular scales: an analysis of the BOOMERanG data     

G. De Troia  P. A. R. Ade  J. J. Bock  J. R. Bond  A. Boscaleri  C. R. Contaldi  B. P. Crill  P. de Bernardis  P. G. Ferreira  M. Giacometti  E. Hivon  V. V. Hristov  M. Kunz  A. E. Lange  S. Masi  P. D. Mauskopf  T. Montroy  P. Natoli  C. B. Netterfield  E. Pascale  F. Piacentini  G. Polenta  G. Romeo  J. E. Ruhl 《Monthly notices of the Royal Astronomical Society》2003,343(1):284-292

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