3,215 research outputs found
Environmental Issues in Indian Freshwater Aquaculture
Aquaculture is assuming increasing importance in recent years on a global basis including the Indian subcontinent. With possibilities of obtaining high productivity levels among different farming system, there has been a flux between the farming practices and aquaculture is receiving greater investments both in public and private secto
On the quantum and classical scattering times due to charged dislocations in an impure electron gas
We derive the ratio of transport and single particle relaxation times in
three and two - dimensional electron gases due to scattering from charged
dislocations in semiconductors. The results are compared to the respective
relaxation times due to randomly placed charged impurities. We find that the
ratio is larger than the case of ionized impurity scattering in both three and
two-dimensional electron transport.Comment: 4 pages, 3 figure
SU(2) Chiral Sigma Model Study of Phase Transition in Hybrid Stars
We use a modified SU(2) chiral sigma model to study nuclear matter component
and simple bag model for quark matter constituting a neutron star. We also
study the phase transition of nuclear matter to quark matter with the mixed
phase characterized by two conserved charges in the interior of highly dense
neutron stars. Stable solutions of Tolman-Oppenheimer-Volkoff equations
representing hybrid stars are obtained with a maximum mass of 1.67
and radius around 8.9 km.Comment: 14 pages, 5 figure
Assessment of manual load carrying and health status of women farm workers of district Sonipat (Haryana), India
In present study an assessment of manual load carrying and health status of women farm workers of Thana Kalan village, Kharkhoda tehsil in Sonipat district of Haryana was conducted. A total of forty women farm workers between 25-40 years age were selected with at least five year load carrying experience, involved in farm work, with no history of chronic disease and willingness to participate in the study. The women farm workers carried water, fodder, cow dung on daily basis and seed, fertilizer and other farm inputs and farm produce on seasonal basis. It was observed that preferable mode of load carrying was head. The quantum of load varied between 20-40 kg. Assessment of health status revealed that musculoskeletal disorder was prevalent in all the age groups. Musculoskeletal disorder namely lower back pain was observed in 87.5 per cent women workers, neck pain in 72.5 per cent women workers followed by knee (32.5%) and foot pain (25 %). The pain severity was mild in most of the women farm workers and nobody was bed ridden for back pain due to load carrying. The younger age women (25-30 years) preferred traditional way of oil massage and rest for relief from back pain and neck pain after load carrying, while older women (31-40 years) had to take rest for back pain relief. The issue of occupational health disorder associated with manual load carrying by women farm worker has to receive attention to reduce the potential health risk
Magnetotransport properties of a polarization-doped three-dimensional electron slab
We present evidence of strong Shubnikov-de-Haas magnetoresistance
oscillations in a polarization-doped degenerate three-dimensional electron slab
in an AlGaN semiconductor system. The degenerate free carriers
are generated by a novel technique by grading a polar alloy semiconductor with
spatially changing polarization. Analysis of the magnetotransport data enables
us to extract an effective mass of and a quantum
scattering time of . Analysis of scattering processes helps
us extract an alloy scattering parameter for the AlGaN material
system to be
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