Tilted Bianchi Type I Models with Heat Conduction Filled with Disordered Radiations of Perfect Fluid in General Relativity     

Raj Bali  Keshav Sharma 《Astrophysics and Space Science》2000,271(3):227-235

In this paper, we have investigated some tilted Bianchi Type I models with heat conduction filled with disordered radiation of perfect fluid. To get a determinate solution, we have assumed a condition A =(BC) ⁿ between metric potentials. Alternatively we have discussed the case A=(BC) ^1/3 for which tilted nature of the model is preserved. The various and geometrical features with singularities in the models are also discussed. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Delta Scuti Network observations of XX Pyx: detection of 22 pulsation modes and of short-term amplitude and frequency variations     

G. Handler  T. Arentoft  R. R. Shobbrook  M. A. Wood  L. A. Crause  P. Crake  F. Podmore  A. Habanyama  T. Oswalt  P. V. Birch  G. Lowe  C. Sterken  P. Meintjes  J. Brink  C. F. Claver  R. Medupe  J. A. Guzik  T. E. Beach  P. Martinez  E. M. Leibowitz  P. A. Ibbetson  T. Smith  B. N. Ashoka  N. E. Raj  D. W. Kurtz  L. A. Balona  D. O'donoghue  J. E. S. Costa §  M. Breger 《Monthly notices of the Royal Astronomical Society》2000,318(2):511-525

  相似文献   

Assessment of ecological disturbance in the mangrove forest of Sundarbans caused by cyclones using MODIS time-series data (2001–2011)     

Dibyendu Dutta  Prabir Kumar Das  Soubhik Paul  Jaswant Raj Sharma  Vinay Kumar Dadhwal 《Natural Hazards》2015,79(2):775-790

  相似文献   

Abe Barek landslide and landslide susceptibility assessment in Badakhshan Province,Afghanistan   总被引：2，自引：0，他引：2  

Jianqiang Zhang  Deo Raj Gurung  Rongkun Liu  Manchiraju Sri Ramachandra Murthy  Fenghuan Su 《Landslides》2015,12(3):597-609

  相似文献   

Geophysical and geochemical approach to identify the groundwater quality in Agastheeswaram Taluk of Kanyakumari District,Tamil Nadu,India     

Y. Srinivas  D. Hudson Oliver  A. Stanley Raj  N. Chandrasekar 《Arabian Journal of Geosciences》2015,8(12):10647-10663

  相似文献   

Characteristics of aerosol optical depth and Ångström parameters over Mohal in the Kullu Valley of Northwest Himalayan Region,India     

Nand Lal Sharma  Jagdish Chand Kuniyal  Mahavir Singh  Manum Sharma  Raj Pal Guleria 《Acta Geophysica》2011,59(2):334-360

The measurements using a ground based multi wavelength radiometer (MWR) at Mohal (31°54′N, 77°07′E, 1154 m AMSL) in the Kullu valley of Northwestern Himalayan region show that the spectral aerosol optical depth (AOD) and turbidity coefficient, β, are high in summer, moderate in monsoon season, low in winter and lowest in autumn, while wavelength exponent, α, has an opposite trend. Average annual value of AOD at 500 nm is 0.24±0.01, 0.43±0.02, and 0.28±0.02; that of β is 0.14±0.01, 0.22±0.02, and 0.17±0.03; and that of α is 1.06±0.09, 1.16±0.10, and 0.86±0.13, respectively, for clear, hazy and partially clear sky days. The considerably greater value of β on hazy days indicates more coarse particles in mountain haze. The fractional asymmetry factor (AF) is more negative in summer and autumn months. The AOD and β have significantly positive correlation with temperature and wind speed, suggesting high AODs and turbidity on hot and windy days.  相似文献   

Suspended sediment transport during tropical‐cyclone floods in Fiji     

Ray Kostaschuk  James Terry  Rishi Raj 《水文研究》2003,17(6):1149-1164

Flow records, rising‐stage sediment samplers, and a sand suspension model are used to examine suspended sediment concentrations during major floods caused by tropical cyclones TC Joni and TC Kina in the Rewa River, Fiji. The highest concentrations of total suspended solids were measured during the early stages of TC Kina. The suspension model predicts higher sand concentrations for TC Kina compared with TC Joni because of the larger slope and higher shear stresses during Kina. Extremely high wash load concentrations early in TC Kina are at least partly due to remobilization of fine sediment deposited during the earlier TC Joni flood. Samples from the TC Kina had volumetric concentrations larger than 5%, indicating hyperconcentrated streamflows. Mass‐density shear stresses in the hyperconcentrated flows are up 1·6 times larger than clear‐water shear stresses, but they occur early during low stages of the flood and probably do not result in severe bed erosion. Copyright © 2002 John Wiley & Sons, Ltd.  相似文献   

Magnetostatic stiff-fluid model of cylindrical symmetry in general relativity     

Raj Bali  Atul Tyagi 《Astrophysics and Space Science》1991,185(2):299-304

We study the static stiff-fluid model for perfect fluid distributions in the presence of incident magnetic field. The magnetic field is surrounded by static stiff fluid of infinite electric conductivity and it is due to the electric current flowing along theZ-axis. The various physical and geometrical properties together with the state of model in absence of magnetic field are also discussed.  相似文献   

An LRS Bianchi Type I Bulk Viscous Fluid String Cosmological Model in General Relativity     

Raj Bali  R.D. Upadhaya 《Astrophysics and Space Science》2003,288(3):287-292

An LRS Bianchi type I string dust cosmological model with and without bulk viscosity following a method used by Letelier and Stachel, is investigated. To get a determine solution, it is assumed that σ∝θ whereσ is shear and θ is scalar of expansion and which leads to A =αBⁿ were n is a constant. The physical and geometrical aspects of the model are also discussed. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

Photometric and spectroscopic evolution of the Type IIP supernova SN 2004et     

D. K. Sahu  G. C. Anupama  S. Srividya  S. Muneer 《Monthly notices of the Royal Astronomical Society》2006,372(3):1315-1324

  相似文献