Three foliicolous taxa of Lejeuneaceae (Marchantiophyta) new to India from Great Nicobar Biosphere Reserve, Andaman and Nicobar Islands

Three liverworts belonging to family Lejeuneaceae (Marchantiophyta), Cololejeunea equialbi, Colura pluridentata and Drepanolejeunea thwaitesiana var. thwaitesiana are being reported as new to Indian flora from Great Nicobar Biosphere Reserve in the Andaman and Nicobar Islands. The diversity and distribution of the genera Cololejeunea, Colura and Drepanolejeunea in India have been discussed

Magnetska svojstva monokristala bizmuta punjenih galijem i indijem

Diamagnetic susceptibility in single crystals of bismuth doped with gallium and indium has been measured as a function of temperature between 100 and 300 K. Susceptibility decreases with the increase of temperature for each of the samples and also with the increase of the percentage of impurity. An attempt has been made to explain properly the observed phenomena on the basis of the large diamagnetism exhibited by valence electrons.Mjerili smo dijamagnetsku susceptibilnost monokristala bizmuta punjenih galijem i indijem u ovisnosti o temperaturi između 100 i 300 K. Susceptibilnost se smanjuje s povećanjem temperature i povećanjem punjenja za sve uzorke. Predlažemo tumačenje postignutih ishoda mjerenja na osnovi jakog dijamagnetizma koji pokazuju valentni elektroni

Snow cover, snowmelt and runoff in the Himalayan River basins

Not withstanding the seasonal vagaries of both rainfall amount and snowcover extent, the Himalayan rivers retain their basic perennial character. However, it is the component of snowmelt yield that accounts for some 60 to 70 percent of the total annual flow volumes from Hamilayan watersheds. On this large hydropotential predominantly depends the temporal performance of hydropower generation and major irrigation projects. The large scale effects of Himalayan snowcover on the hydrologic responses of a few selected catchments in western Himalayas was studied. The antecedent effects of snowcover area on long and short term meltwater yields can best be analyzed by developing appropriate hydrologic models forecasting the pattern of snowmelt as a function of variations in snowcover area. It is hoped that these models would be of practical value in the management of water resources. The predictability of meltwater for the entire snowmelt season was studied, as was the concurrent flow variation in adjacent watersheds, and their hydrologic significance. And the applicability of the Snowmelt-Runoff Model for real time forecast of daily discharges during the major part of the snowmelt season is examined

Radiating spherical collapse with heat flow

We present here a simple model of radiative gravitational collapse with radial heat flux which describes qualitatively the stages close to the formation of a superdense cold star. Starting with a static general solution for a cold star, the model can generate solutions for the earlier evolutionary stages. The temporal evolution of the model is specified by solving the junction conditions appropriate for radiating gravitational collapse.Comment: 13 pages, including 3 figures, submitted to IJMP-

Thermodynamic Geometry of the Born-Infeld-anti-de Sitter black holes

Thermodynamic geometry is applied to the Born-Infeld-anti-de Sitter black hole (BIAdS) in the four dimensions, which is a nonlinear generalization of the Reissner-Norstr\"Aom-AdS black hole (RNAdS). We compute the Weinhold as well as the Ruppeiner scalar curvature and find that the singular points are not the same with the ones obtained using the heat capacity. Legendre-invariant metric proposed by Quevedo and the metric obtained by using the free energy as the thermodynamic potential are obtained and the corresponding scalar curvatures diverge at the Davies points.Comment: Latex,19 pages,14 figure