Quaternionic approach to dual Magneto-hydrodynamics of dyonic cold plasma

The dual magneto-hydrodynamics of dyonic plasma describes the study of electrodynamics equations along with the transport equations in the presence of electrons and magnetic monopoles. In this paper, we formulate the quaternionic dual fields equations, namely, the hydro-electric and hydro-magnetic fields equations which are an analogous to the generalized Lamb vector field and vorticity field equations of dyonic cold plasma fluid. Further, we derive the quaternionic Dirac-Maxwell equations for dual magneto-hydrodynamics of dyonic cold plasma. We also obtain the quaternionic dual continuity equations that describe the transport of dyonic fluid. Finally, we establish an analogy of Alfven wave equation which may generate from the flow of magnetic monopoles in the dyonic field of cold plasma. The present quaternionic formulation for dyonic cold plasma is well invariant under the duality, Lorentz and CPT transformations.Comment: 20 pages, Revised versio

Competition between antiferromagnetism and superconductivity, electron-hole doping asymmetry and "Fermi Surface" topology in cuprates

We investigate the asymmetry between electron and hole doping in a 2D Mott insulator, and the resulting competition between antiferromagnetism (AF) and d-wave superconductivity (SC), using variational Monte Carlo for projected wave functions. We find that key features of the T = 0 phase diagram, such as critical doping for SC-AF coexistence and the maximum value of the SC order parameter, are determined by a single parameter which characterises the topology of the "Fermi surface" at half filling defined by the bare tight-binding parameters. Our results give insight into why AF wins for electron doping, while SC is dominant on the hole doped side. We also suggest using band structure engineering to control the parameter for enhancing SC.Comment: 4 pages, 4 figure

Spatial-temporal evolution of the current filamentation instability

The spatial-temporal evolution of the purely transverse current filamentation instability is analyzed by deriving a single partial differential equation for the instability and obtaining the analytical solutions for the spatially and temporally growing current filament mode. When the beam front always encounters fresh plasma, our analysis shows that the instability grows spatially from the beam front to the back up to a certain critical beam length; then the instability acquires a purely temporal growth. This critical beam length increases linearly with time and in the non-relativistic regime it is proportional to the beam velocity. In the relativistic regime the critical length is inversely proportional to the cube of the beam Lorentz factor $\gamma_{0b}$. Thus, in the ultra-relativistic regime the instability immediately acquires a purely temporal growth all over the beam. The analytical results are in good agreement with multidimensional particle-in-cell simulations performed with OSIRIS. Relevance of current study to recent and future experiments on fireball beams is also addressed

Momentum space properties from coordinate space electron density

Electron density and electron momentum density, while independently tractable experimentally, bear no direct connection without going through the many-electron wave function. However, invoking a variant of the constrained-search formulation of density functional theory, we develop a general scheme (valid for arbitrary external potentials) yielding decent momentum space properties, starting exclusively from the coordinate space electron density. Numerical illustration of the scheme is provided for the closed-shell atomic systems He, Be and Ne and for $1s^1~2s^1$ singlet electronic excited state for Helium by calculating the Compton profiles and the $$ expectation values derived from given coordinate space electron densities.Comment: 4 pages, 1 figur

Role of NABARD in financing marine fisheries projects

National Bank for Agriculture and Rural Development Is the apex organisation dealing with the policy, planning and operational matters relates to credit for development of agriculture and allied sectors including marine fisheries. NABARD has been playing a significant role in promoting marine fisheries development as a refinancing agency as well as developmental agency through conducting training programmes, supporting innovative type of schemes and funding research projects. NABARD has been extending refinance assistance to schemes for acquiring fishing vessels, mariculture and for building Infrastructural facilities. The experiences of NABARD in Implementing various fisheries schemes (s discussed in this paper. The significant features of the pilot credit project Implemented in Orissa with BOBP assistance are highlighted. With view to increasing the participation of financial institutions in the process of marine fisheries development, suggestions are made to Improve flow of credit to marine fisherie

Nanoshearing - Collective carbon nanotube micromechanics

N/

Accessing research literature: A mixed-method study of academics in Higher Education Institutions in Nepal

Background: Research in Higher Education (HE), particularly in health and medical sciences plays a crucial role, not only in enhancing knowledge and skills of students and academics, but also in helping to develop managers and policy makers who rely on evidence-based planning and programming. This paper reports university teacher’s knowledge and practices in accessing electronic research-based evidence in health and medical sciences in Nepal. Material and Methods: This was mixed-methods study comprising a self-administered questionnaire completed by HE teachers and informant key interviews with authorities of HE institutions. A total of 15 out of the total 40 institutions offering HE above Bachelors level on health-related subjects were included for the study. Results: The response rate was 68%; 244 out of 360 HE teachers completed self-administered questionnaire. The respondents comprised nurses (36%), followed by doctors (23%), public health practitioners (18%), dentists (17%) and pharmacists (12%). Most of the HE teachers reported that they have computer skills and possess their own computer. Two-thirds (66%) of the HE teachers had work email and almost all (93%) have a personal email ID. All institutions had a computer lab and/or library. Almost all teachers had internet access at work but the internet was reportedly slow. Each institution had a librarian to support to the students and staff but only a third of teachers sought their help. Many do not know what kind of support librarians can provide. Less than half of the staff had accessed electronic research materials. This proportion varied between HE institutions ranging from 13 to 83%. HINARI and PubMed were the mostly used research databases. Less than half of respondents (48%) had published research papers in peer-reviewed journals, and only 19% published a paper based on a systematic review. Female HE teachers were less likely to publish (32%) than males (68%). More readers and professors had published (75%) than instructors/assistant lecturers (30%) and lecturers (45%). Conclusions: Accessing electronic research literature provides an opportunity to gathering up-to-date research-based information that should be core to all health curricula. We call upon curriculum developers and university authorities in Nepal to revise health curricula and help build electronic searching skills among staff and students

Indications of superconductivity in doped highly oriented pyrolytic graphite

We have observed possible superconductivity using standard resistance vs. temperature techniques in phosphorous ion implanted Highly Oriented Pyrolytic Graphite. The onset appears to be above 100 K and quenching by an applied magnetic field has been observed. The four initial boron implanted samples showed no signs of becoming superconductive whereas all four initial and eight subsequent samples that were implanted with phosphorous showed at least some sign of the existence of small amounts of the possibly superconducting phases. The observed onset temperature is dependent on both the number of electron donors present and the amount of damage done to the graphene sub-layers in the Highly Oriented Pyrolytic Graphite samples. As a result the data appears to suggest that the potential for far higher onset temperatures in un-damaged doped graphite exists.Comment: 7 pages, 1 table, 5 figures, 11 references, Acknowledgments section was correcte