Thermally assisted quantum vortex tunneling in the Hall and dissipative regime

Quantum vortex tunneling is studied for the case where the Hall and the dissipative dynamics are simultaneously present. For a given temperature, the magnetization relaxation rate is calculated as a function of the external current and the quasiparticle scattering time. The relaxation rate is solved analytically at zero temperature and obtained numerically at finite temperatures by the variational method. In the moderately clean samples, we have found that a minimum in the relaxation rate exists at zero temperature, which tends to disappear with increase in the temperature.Comment: 18 pages, 9 figures, to be published in Phys. Rev.

Information Resource Evaluation for Information Provision in University Libraries in the North Central Zone of Nigeria

This study was to ascertain the extent of information resource provision in universities in the North Central Zone of Nigeria, and to determine the influence of evaluation on the provision of library resources in universities in the North Central Zone of Nigeria. In line with this, two research questions guided the study; what is the extent of library resource provision in universities in the North Central Zone of Nigeria? And what is the influence of evaluation on the provision of library resources in the universities in the North Central Zone of Nigeria? The research design adopted was Ex post facto research. All the ninety nine librarians and all the twenty five chief and assistant chief library officers in the university libraries in all the six state, four federal, and four private- owned universities in the North Central Zone of Nigeria were the population and also the sampled population. The finding among others revealed that evaluating how each resource of the library helps to achieve the goals of the library had a significant influence on information resource provision in the university libraries. The study concluded that proper application of evaluation in critical areas such as those relating to selection, acquisition, processing, lending, preservation and use was very critical

Organization As a Managerial Variable: A Study of Financial Resource Provision In University Libraries in The North Central Zone of Nigeria

This paper examined the influence of the managerial variable of organization on the provision of library resources in university libraries in the North Central Zone of Nigeria. This study was guided by two research questions, what is the extent of financial resource provision in universities in the North Central Zone of Nigeria; and what is the influence of planning on the provision of library resources in universities in the North Central Zone of Nigeria? The sample population of the study was 124 comprising all the ninety nine librarians and all the twenty five chief and assistant chief library officers in the university libraries studied. The instruments for collecting data for this study were a researcher administered questionnaire and personal interview coupled with observation. The finding revealed that organization was found to have significant influence on the provision of financial resources. Recommendation for stakeholders in library and information science to organize various management training programmes for university librarians and other staff of the university library performing management functions was made among other