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Search Results: 1 - 10 of 21435 matches for " Birendra Kumar Panda "
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Plasma Dispersion in Fractional-Dimension Space
Krushna Mohan Mohapatra,Birendra kumar Panda
Physics , 2014,
Abstract: The dielectric function for electron gas with parabolic energy bands is derived in a fractional dimensional space. The static response function shows a good dimensional dependance. The plasma frequencies are obtained from the roots of the dielectric functions. The plasma dispersion shows strong dimensional dependence. It is found that the plasma frequencies in the low dimensional systems are strongly dependent on the wave vector. It is weakly dependent in the three dimensional system and has a finite value at zero wave vector.
Properties of Many-Polaron in Fractional Dimensional Space
Krushna Mohan Mohapatra,Birendra Kumar Panda
Physics , 2014,
Abstract: Polaron binding energy and effective mass are calculated in the fractional-dimensional space approach using the second-order perturbation theory. The effect of carrier density on the static screening correction of the electron-phonon interaction is calculated using the Hubbard's local field factor. It is found that the effective mass and the binding energy both decrease with increase in doping.
Manypolaron system in the Fractional Dimensional Space within Plasmon Pole Approximatiion
Krushna Mohan Mohapatra,Birendra Kumar Panda,Susmita Kar
Physics , 2014,
Abstract: The polaron binding energy and effective mass in a degenerate polar gas is calculated in the fractional-dimensional approach under plasmon pole approximation.The effect of carrier densities on the static and dynamic screening correction of the electron-phonon interaction and electron-electron interaction to the polaronic propertis is calculated from electron self-energies within the second-order perturbation method. The Hubbard local field factor has been used for the static screening correction in the polaronic properties. We found that polaronic properties decrease with increase with carrier density and dimensionality of the system.
Synthesis, characterization and photophysical properties of quinolin-8-olato chelated osmium(II) organometallics bearing a pendant imine-phenol motif and electrogeneration of trivalent analogue  [PDF]
Bikash Kumar Panda
Open Journal of Inorganic Chemistry (OJIC) , 2012, DOI: 10.4236/ojic.2012.23008
Abstract: The reaction of Os(RL1)(PPh3)2(CO)Br, 1b, with qui-nolin-8-ol (HQ), 2, has furnished complexes of the type [Os(RL2)(PPh3)2(CO)(Q)], 3, in excellent yield (RL1 is C6H2O-2-CHNHC6H4R(p)-3-Me-5, RL2 is C6H2OH-2-CHNC6H4R(p)-3-Me-5 and R is Me, OMe, Cl). In this process, quinolin-8-olato (Q) undergoes five-membered chelation, the iminium-phenolato function tautomerizing to the imine-phenol function. The trans geometry of the Os(PPh3)2 fragment is consistent with the occurrence of a single 31P resonance near –6.0 ppm in 3. In dichloromethane solution, 3 displays a quasireversible 3+/3 couple near 0.40 V vs. SCE (3+ is the osmium (III) analogue of 3). Coulometrically generated solutions of 3+ displays a strong absorption near 340 nm, 415 nm and 500 nm and are one-electron paramagnetic (low-spin d5, S = 1/2) and show rhombic EPR spectra in 1:1 dichloromethanetoluene solution at 77 K with g values near 2.44, 2.20, 1.83. Distortion parameters using the observed g values have been computed. Solutions of 3 absorb near 420 nm and emit near 510 nm at 298 K and 580 nm at 77 K. The fluorescence is believed to originate from the 3MLCT state.
Green Synthesis and Characterization of Gold Nanoparticles Using Onion (Allium cepa) Extract  [PDF]
Umesh Kumar Parida, Birendra Kumar Bindhani, Padmalochan Nayak
World Journal of Nano Science and Engineering (WJNSE) , 2011, DOI: 10.4236/wjnse.2011.14015
Abstract: In the present research program, cost effective and environment friendly gold nanoparticless were synthesized using the onion (Allium cepa) extract as the reducing agent. The nanoparticless were characterized using UV-visble, XRD, and SEM, TEM methods. The absorption peak at 540 nm was found to be broaden with increase in time indicating the polydispersity nature of the nanoparticles. The XRD results suggested that the crystallization of the bio-organic phase occurs on the surface of the gold nanoparticles or vice versa. The broadening of peaks in the XRD patterns was attributed to particle size effects. The internalization of nanoparticles within cells could occur via processes including phagocytosis, fluid-phase endocytosis and receptor mediated endocytosis.
Influence of Microstructure on Beneficiation of Low-Grade Siliceous Manganese Ore from Orissa, India  [PDF]
Patitapaban Mishra, Birendra Kumar Mohapatra, Pradeep Kumar Mallick, Khageswar Mahanta
Journal of Minerals and Materials Characterization and Engineering (JMMCE) , 2013, DOI: 10.4236/jmmce.2013.13015
Abstract: Two low-grade siliceous manganese ores such 1) siliceous crystalline and 2) siliceous cherty types from north Orissa, Indiawas mineralogically characterized and investigated for their possible upgradation. Both the Mn-ore types were subjected to different physical beneficiation techniques under identical conditions and results reported. The results revealed that in the case of low-grade siliceous crystalline type Mn-ore a feed having 26% Mn could be upgraded to more than 45% Mn by dry magnetic separation with 69% recovery at 1.00 tesla magnetic intensity. But the cherty type Mn-ore could not respond well to any of the beneficiation techniques, particularly dry magnetic separation, because of poor liberation even at a size fraction below 100 mesh, though the other type gives best result at this size fraction.
HIV/AIDS Related Stigma among Male Labor Migrants in Nepal  [PDF]
Sushma Dahal, Paras Kumar Pokharel, Birendra Kumar Yadav
World Journal of AIDS (WJA) , 2013, DOI: 10.4236/wja.2013.34039

Labor migrants are those of the at-risk groups for HIV. This cross-sectional study has tried to examine HIV/AIDS-related stigma among Nepalese returnee male labor migrants. Migrant workers who have worked at least six months abroad were asked different questions related to sexual behavior, knowledge on HIV/AIDS & condom and HIV/AIDS-related stigma. Stigma was measured on a three-point rating scale as high, average and low stigma. About 58% of migrants had the view “I would rather not know if I have HIV” followed by “I don’t want to be friends with people living with HIV” (53.6% migrants) and “people with HIV are cursed” (35.5% migrants). High stigma was present among 15.5% of the total respondents with high proportion among those with higher age, lower education, rural residence, and no knowledge on Voluntary Counseling and Testing (VCT) service. About a quarter of respondents were of the view that migrants infected with HIV while abroad should not be allowed to return Nepal. Some level of stigma on HIV/AIDS exists among male labor migrants in Nepal. Interventions aiming at reducing stigma should consider the factors like migrants’ age, education, place of residence and knowledge on VCT services.

Birendra Kumar Mandal
Journal of Pharmaceutical and Scientific Innovation , 2012,
Abstract: Cannabis is said to be a gateway drug that increases the users’ probability of taking up hard drugs like amphetamine or heroin. The empirical basis for the hypothesis is the common finding that most hard drug users have started with less dangerous drugs first and that there seems to be a staircase from alcohol and solvents via cannabis and tablets to amphetamine, cocaine and heroin. Although controversial, the hypothesis has had considerable influence on drug policy and legislation in many countries and has been a powerful argument in debates about legalization or decriminalization of cannabis.
Formation of Neutron-Rich and Superheavy Elements in Astrophysical Objects  [PDF]
Rabinarayan Panda, Suresh Kumar Patra
Journal of Modern Physics (JMP) , 2010, DOI: 10.4236/jmp.2010.15044
Abstract: We calculate the reaction and the fusion cross-sections of neutron-rich heavy nuclei taking light exotic isotopes as projectiles. Results of neutron-rich Pb and U isotopes are demonstrated as the representative targets and He, B as the projectiles. The Gluaber Model and the Coupled Channel Formalism are used to evaluate the reaction and the fusion cross-sections for the cases considered. Based on the analysis of these cross-sections, we predict the formation of heavy, superheavy and super-superheavy elements through rapid neutron/ light nuclei capture r-process of the nucleosynthesis in astrophysical objects.
Instantaneous Active and Reactive Power and Current Strategies for Current harmonics cancellation in 3-ph 4wire SHAF With both PI and Fuzzy Controllers  [PDF]
Suresh Mikkili, Anup Kumar Panda
Energy and Power Engineering (EPE) , 2011, DOI: 10.4236/epe.2011.33036
Abstract: Control strategies for extracting the three-phase reference currents for shunt active power filters are compared, evaluating their performance under different source conditions with PI and Fuzzy Controllers in MATLAB/Simulink environment When the supply voltages are balanced and sinusoidal, the two control strategies are converge to the same compensation characteristics; However, the supply voltages are distorted and/or un-balanced sinusoidal, these control strategies result in different degrees of compensation in harmonics. The compensation capabilities are not equivalent, with p - q control strategy unable to yield an adequate solution when source voltages are not ideal. Extensive simulations are carried out with PI controller and also with Fuzzy controller for both p-q and Id-Iq control strategies under different main voltages. Extensive Simulations are carried out with PI as well as fuzzy controller for both p-q and Id - Iq control strategies by considering different voltage conditions and adequate results were presented. On owing Id - Iq method with fuzzy logic controller gives away an out-standing performance under any voltage conditions (balanced, un-balanced, balanced and non-sinusoidal).
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