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Search Results: 1 - 10 of 21998 matches for " Ranjan Kumar Giri "
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Hypolipidemic Activity of Spinacia Oleracea L. in Atherogenic Diet Induced Hyperlipidemic Rats.
Ranjan Kumar Giri
Journal of Biomedical and Pharmaceutical Research , 2012,
Abstract: Spinacia oleracea (spinach) of family Amaranthaceae is an important plant used traditionally for medicinal purposes. Hyperlipidemia was induced by treated orally with atherogenic diet. In atherogenic diet induced hyperlipidemic model, the rats receiving Spinacia oleracea powder showed significant reduction in total cholesterol, triglycerides, total protein and elevation of high density lipoprotein cholesterol. Spinacia oleracea was found to possess significant hypolipidemic activity. The results also suggest that Spinacia oleracea powder at 200mg and 400 mg/kg b.wt. concentrations are an excellent lipid-lowering agent.
A New Approach To Fingerprint Recognition
Ipsha Panda,Saumya Ranjan Giri,Prakash Kumar,Anjali Mohaptra
International Journal on Computer Science and Engineering , 2012,
Abstract: Fingerprint recognition continues to be the most widely used biometric system for security purposes. Still it is a complex pattern recognition problem. In this paper, a new approach for fingerprintrecognition is developed. There are three steps: image preprocessing, minutiae extraction and minutiae matching. In the first stage the fingerprint image is preprocessed to produce a thinned image with noisy data deleted. Then for minutiae extraction, some heuristic rules have been developed based on the concept of neighboring pixels. This stage results in removal of spurious minutiae points and true minutiae points are detected. Finally an algorithm for minutiae matching has been designed to improve the performance and have accurate results.
Normal mode analysis for scalar fields in BTZ black hole background
Sayan K Chakrabarti,Pulak Ranjan Giri,Kumar S. Gupta
Physics , 2008, DOI: 10.1140/epjc/s10052-009-0870-0
Abstract: We analyze the possibility of inequivalent boundary conditions for a scalar field propagating in the BTZ black hole space-time. We find that for certain ranges of the black hole parameters, the Klein-Gordon operator admits a one-parameter family of self-adjoint extensions. For this range, the BTZ space-time is not quantum mechanically complete. We suggest a physically motivated method for determining the spectra of the Klein-Gordon operator.
Scalar field dynamics in warped AdS_3 black hole background
Sayan K. Chakrabarti,Pulak Ranjan Giri,Kumar S. Gupta
Physics , 2009, DOI: 10.1016/j.physletb.2009.09.031
Abstract: We study the normal modes of a scalar field in the background of a warped AdS_3 black hole which arises in topologically massive gravity. We discuss the normal mode spectrum using the brick wall boundary condition. In addition, we investigate the possibility of a more general boundary condition for the scalar field.
Electron Capture and Scaling Anomaly in Polar Molecules
Pulak Ranjan Giri,Kumar S. Gupta,S. Meljanac,A. Samsarov
Physics , 2007, DOI: 10.1016/j.physleta.2008.01.008
Abstract: We present a new analysis of the electron capture mechanism in polar molecules, based on von Neumann's theory of self-adjoint extensions. Our analysis suggests that it is theoretically possible for polar molecules to form bound states with electrons, even with dipole moments smaller than the critical value D_0 given by 1.63\times10^{-18} esu cm. This prediction is consistent with the observed anomalous electron scattering in H_2S and HCl, whose dipole moments are smaller than the critical value D_0. We also show that for a polar molecule with dipole moment less than D_0, typically there is only a single bound state, which is in qualitative agreement with observations. We argue that the quantum mechanical scaling anomaly is responsible for the formation of these bound states.
Wound healing potential of pterospermum acerifolium wild. with induction of tumor necrosis factor - α
Aswini Kumar Senapati,Ranjan Kumar Giri,Dibya Sundar Panda,Sremantula Satyanarayan
Journal of Basic and Clinical Pharmacy , 2011,
Abstract: Pterospermum acerifolium, a well-known plant in Indian medicine possesses various therapeutic properties including healing properties and cytokine induction. Wound healing activity of ethanolic extract of P. acerifolium flower along with its effect on tumor necrosis factor-α (TNF-α) was assessed using excision model of wound repair in Wistar albino rats. After application of the P. acerifolium extract, rate of epithelization with an increase in wound contraction was observed. Animals tropically treated with 10% P. acerifolium extract in petroleum jelly, the wound healing process was observed faster as compared to control group which were treated with petroleum jelly alone. A significant accelerated healing was noticed in animals which were additionally prefed with 250mg/kg body weight of ethanolic P. acerifolium extract daily for 20 consecutive days along with the topical application 10% P. acerifolium extract. During wound healing phase TNF-α level was found to be up regulated by P. acerifolium treatment. Early wound healing may be pronounced due to P. acerifolium extract elevating TNF α production.
Effort Estimation for Design Activity in Power Plant Equipments  [PDF]
Parimal Kumar Giri
Journal of Software Engineering and Applications (JSEA) , 2012, DOI: 10.4236/jsea.2012.512115
Abstract:

This Software for Design Activity in Power Plants Equipments helps the Power Plant engineers and managers to manage the development and design activities of equipments in the field of power plants. This paper is basically concerned with the computerization of the design activity of Condenser, vital equipment in Heat Exchanger Unit (HEU) of Thermal Power Plant required for condensing the steam and for further reclaimable purposes to achieve economy. This software will also provide facilities to maintain user profile and the respective work details. The study use a developed model which estimates software effort by studying and analyzing small and medium scale application software.

Physical realization for Riemann zeros from black hole physics
Pulak Ranjan Giri
Physics , 2009,
Abstract: According to a conjecture attributed to Polya and Hilbert, there is a self-adjoint operator whose eigenvalues are the the nontrivial zeros of the Riemann zeta function. We show that the near-horizon dynamics of a massive scalar field in the Schwarzscild black hole spacetime, under a reasonable boundary condition, gives rise to normal mode frequencies that coincide with the nontrivial Riemann zeros. In achieving this result, we exploit the Bekenstein conjecture of black hole area quantization, and argue that it is responsible for the breaking of the continuous scale symmetry of the near horizon dynamics into a discrete one.
Non-commutativity as a measure of inequivalent quantization
Pulak Ranjan Giri
Physics , 2008, DOI: 10.1088/1751-8113/42/35/355206
Abstract: We show that the strength of non-commutativity could play a role in determining the boundary condition of a physical problem. As a toy model we consider the inverse square problem in non-commutative space. The scale invariance of the system is known to be explicitly broken by the scale of non-commutativity \Theta. The resulting problem in non-commutative space is analyzed. It is shown that despite the presence of higher singular potential coming from the leading term of the expansion of the potential to first order in \Theta, it can have a self-adjoint extensions. The boundary conditions are obtained, belong to a 1-parameter family and related to the strength of non-commutativity.
Quantization of neutron in Earth's gravity
Pulak Ranjan Giri
Physics , 2007,
Abstract: Gravity is the weakest of all four known forces in the universe. Quantum states of an elementary particle due to such a weak field is certainly very shallow and would therefore be an experimental challenge to detect. Recently an experimental attempt was made by V. V. Nesvizhevsky et al., Nature 415, 297 (2002), to measure the quantum states of a neutron, which shows that ground state and few excited states are \sim 10^{-12}eV. We show that the energy of the ground state of a neutron confined above Earth's surface should be \sim 10^{-37}eV. The experimentally observed energy levels are 10^{25} times deeper than the actual energy levels it should be and thus certainly not due to gravitational effect of Earth. Therefore the correct interpretation for the painstaking experimental results of Ref. \cite{nes1} is due to the confinement potential of a one dimensional box of length L \sim 50\mu m, generated from the experimental setup as commented before \cite{hansoon}. Our results thus creates a new challenge to the experimentalist to resolve the shallow energy levels of the neutron in Earth's gravitational field in future.
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