17,224 research outputs found
Quark-Gluon Plasma: Present and Future
We review a sample of the experimental results from AGS to SPS and RHIC and
their interpretations towards understanding of the Quark-Gluon Plasma. We
discuss extrapolations of these results to the upcoming LHC experiments.
Finally, we present the plans to probe the QCD critical point with an energy
scan at RHIC and FAIR facilities.Comment: Invited talk at the DAE Symposium on Nuclear Physics (December 2007)
at Sambalpur University, India. 9 page
A history of the Lonar crater, India: An overview
The origin of the circular structure at Lonar, India, described variously as cauldron, pit, hollow, depression, and crater, has been a controversial subject since the early nineteenth century. A history of its origin and other aspects from 1823 to 1990 are overviewed. The structure in the Deccan Trap Basalt is nearly circular with a breach in the northeast, 1830 m in diameter, 150 m deep, with a saline lake in the crater floor. Over the years, the origin of the Lonar structure has risen from volcanism, subsidence, and cryptovolcanism to an authentic meteorite impact crater. Lonar is unique because it is probably the only terrestrial crater in basalt and is the closest analog with the Moon's craters. Some unresolved questions are suggested. The proposal is made that the young Lonar impact crater, which is less than 50,000 years old, should be considered as the best crater laboratory analogous to those of the Moon, be treated as a global monument, and preserved for scientists to comprehend more about the mysteries of nature and impact cratering, which is now emerging as a fundamental ubiquitous geological process in the evolution of the planets
Wave Propagation in 1-D Spiral geometry
In this article, we investigate the wave equation in spiral geometry and
study the modes of vibrations of a one-dimensional (1-D) string in spiral
shape. Here we show that the problem of wave propagation along a spiral can be
reduced to Bessel differential equation and hence, very closely related to the
problem of radial waves of two-dimensional (2-D) vibrating membrane in circular
geometry
Irreversibility of field-induced magnetostructural transition in NiCoMnSb shape memory alloy revealed by magnetization, transport and heat capacity studies
The effects of magnetic field on the martensitic transition have been studied
in Ni45Co5Mn38Sb12. We find a large field-induced irreversibility in this
system, as revealed by the field dependence of resistivity, magnetization, and
heat capacity data. At the critical temperature, the field-induced conversion
of the martensitic to austenite phase is not reversible under any field
variation. At this temperature any energy fluctuation induces nucleation and
growth of the equilibrium austenite phase at the expense of the metastable
martensitic phase and gets arrested. All these three measurements completely
rule out the coexistence of austenite and martensitic phases in the
irreversibility regime.Comment: 13 pages, 4 figure
- …