The Emergence of Institutional Repositories: A Conceptual Understanding of Key Issues through Review of Literature

It is the responsibility of the libraries to keep update its users by incorporating different technologies or tricks among the services offered to users. The libraries are managing diversified collection in both electronic and physical formats including the theses and dissertations awarded by their respective parent institutes in physical form. The academic libraries are directed by the Indian government through a mandate to protect and preserve the theses and dissertation in electronic form and provide access to the public domain. Institutional Repositories (IRs) have the perspective to store any amount of information electronically. Therefore, many of the academic libraries are forced to develop their IRs. The present paper is an attempt to find out the answers to some of the burning questions related to creation and management of IRs by the libraries. The library managers are sometimes confused when they asked to install the IRs Software, design the IR policy, motivate faculty, prepare budget estimates for IRs, etc. The current study covered various theoretic aspects related to the creation and maintenance of an IR in an academic institution. The study is based on the review of available literature and analysis focused various aspects of motivations, cost factors and software requirement and its global perspectives for the creation of Institutional Repositories. The paper also discusses the role of IRs in Scholarly Communication. Finally, it highlights the barriers for IRs in an academic environment appeared in the repository literature

Hot Spots on the Fermi Surface of Bi2212: Stripes versus Superstructure

In a recent paper Saini et al. have reported evidence for a pseudogap around (pi,0) at room temperature in the optimally doped superconductor Bi2212. This result is in contradiction with previous ARPES measurements. Furthermore they observed at certain points on the Fermi surface hot spots of high spectral intensity which they relate to the existence of stripes in the CuO planes. They also claim to have identified a new electronic band along Gamma-M1 whose one dimensional character provides further evidence for stripes. We demonstrate in this Comment that all the measured features can be simply understood by correctly considering the superstructure (umklapp) and shadow bands which occur in Bi2212.Comment: 1 page, revtex, 1 encapsulated postscript figure (color

Can luminosity distance measurements probe the equation of state of dark energy

Distance measurements to Type Ia supernovae (SNe Ia) at cosmological distances indicate that the Universe is accelerating and that a large fraction of the critical energy density exists in a component with negative pressure. Various hypotheses on the nature of this ``dark energy'' can be tested via their prediction for the equation of state of this component. If the dark energy is due to a scalar field, its equation of state will in general vary with time and is related to the potential of the field. We review the intrinsic degeneracies of luminosity distance measurements and compute the expected accuracies that can be obtained for the equation of state parameter from a realistic high statistic SNe Ia experiment.Comment: 12 pages, 3 Postscript figures, use epsfig, amssymb, amsmath. Submitted to Physics Letters.