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Search Results: 1 - 10 of 325546 matches for " S. Chakrabarty "
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Synthesis and Optical Manifestation of NiO-Silica Nanocomposite
S. Chakrabarty,K. Chatterjee
ISRN Nanotechnology , 2011, DOI: 10.5402/2011/719027
Abstract:
Electromagnetic Modeling of Metallic Elliptical Plates  [PDF]
Rizwan H. Alad, S. B. Chakrabarty, Karl E. Lonngren
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2012, DOI: 10.4236/jemaa.2012.411065
Abstract: This paper presents the evaluation of the capacitance of an isolated elliptical plate and two parallel elliptical plates. Integral equations are formed by relating the previously unknown charges on the elliptical plates and the potential on the metallic plates. The integral equations are solved by applying the method of moments based on the pulse function and point matching. The elements of the matrix in the method of moments are found by dividing the structure into triangular subsections. The matrix equation is solved in order to compute the unknown charges on each subsection. Numerical results on the capacitance as a function of the geometrical parameters of the ellipse are presented.
Fish community structure and ecological degradation in tropical rivers of India
D. Chakrabarty,S. K. Das
Web Ecology (WE) , 2006, DOI: 10.5194/we-6-27-2006
Abstract: Fish community structure and water chemistry of two tropical rivers of West Bengal, an eastern province of India, were studied for two annual cycles (January 2003–December 2004). Water quality and fish community structure reflected a higher degree of pollution in the Churni river than in the Jalangi river. We observed that 63.6% of fish species had disappeared from the polluted Churni river in 20 yr. For protection of fish biodiversity and enhancement of fish production, a rational management program should be implemented in Churni river.
Supplementation With Potassium Carbonate, Magnesium Carbonate and Their Synergetic Effects on the Economic Traits of the Silkworm, Bombyx mori L.
Basappa Basawanneppa Kaliwal,S Chakrabarty
World Journal of Science and Technology , 2011,
Abstract: Oral supplementation with 50, 100 and 150 μg/ml potassium carbonate to the silkworm larvae resulted in a significant increase in the larval weight except 50 μg/ml and silkgland weight in all the fed groups, cocooning percentage in all the fed groups, female cocoon weight increased in 100 and 150 μg/ml groups, female cocoon shell weight in only 150 μg/ml groups, female cocoon shell ratio only 150 μg/ml groups, male cocoon weight and male cocoon shell weight increased in only 150 μg/ml treated groups but shell ratio is increased in all the treated groups, filament length and weight were significant increased in all the treated groups. The moth emergence percentage, fecundity and hatching percentage were significantly increased in all the treated groups, number of eggs per ovariole and length of the ovariole were significantly increased in 100 and 150 μg/ml treated groups except 50 μg/ml fed groups. The dietary supplementation with 50, 100 and 150 μg/ml magnesium carbonate resulted in a significant increase in survival rate in all the treated groups, female cocoon shell weight was increased only in 150 μg/ml fed groups, no change in shell ratio in 50 μg/ml fed groups, male cocoon weight and shell weight were increased only 150 μg/ml fed groups, shell ratio was increased in all the treated groups, filament length and weight were significantly increased in all the treated groups. The moth emergence percentage was increased only 150 μg/ml fed groups, fecundity, hatching percentage and length of the ovariole were significantly increased in all the treated groups, number of eggs per ovariole was significantly increased in 100 and 150 μg/ml fed groups. The oral supplementation with 50, 100 and 150 μg/ml minerals mixture of potassium carbonate and magnesium carbonate to the silkworm larvae resulted in a significant increase in the larval weight, silkgland weight and survival rate in all the treated groups, female cocoon weight, shell weight and ita€ s ratio, were significantly increased in 100 and 150 μg/ml fed groups, but male cocoon weight was significantly increased only in 150 μg/ml fed groups, where as male cocoon shell weight and shell ratio were increased in 100 and 150 μg/ml fed
Secretly Broadcasting Five Qubit Entangled state among three parties from W- type states
Indranil Chakrabarty,B. S. Choudhury
Physics , 2008,
Abstract: In this work we investigate the problem of secretly broadcasting five qubit entangled state between three different partners We implement the protocol described in ref [16] on three particle W-state shared by three distant partners Alice,Bob and Charlie. The problem is interesting in the sense it is the first attempt to broadcast five qubit entangled state between three parties.
Effect of magnetic field on the strange star
S. Chakrabarty,P. K. Sahu
Physics , 1995, DOI: 10.1103/PhysRevD.53.4687
Abstract: We study the effect of a magnetic field on the strage quark matter and apply to strange star. We found that the strange star becomes more compact in presence of strong magnetic field.
Two Party Non-Local Games
Indranil Chakrabarty,B. S. Choudhury
Physics , 2006, DOI: 10.1007/s10773-008-9748-4
Abstract: In this work we have introduced two party games with respective winning conditions. One cannot win these games deterministically in the classical world if they are not allowed to communicate at any stage of the game. Interestingly we find out that in quantum world, these winning conditions can be achieved if the players share an entangled state. We also introduced a game which is impossible to win if the players are not allowed to communicate in classical world (both probabilistically and deterministically), yet there exists a perfect quantum strategy by following which, one can attain the winning condition of the game.
Secret Broadcasting of W-type state
Indranil Chakrabarty,B. S. Choudhury
Physics , 2008,
Abstract: In this work we describe a protocol by which one can secretly broadcast W-type state among three distant partners. This work is interesting in the sense that we introduce a new kind of local cloning operation to generate two W- type states between these partners from a W-type state initially shared by them.
The Orbit of the High-Mass X-Ray Binary Pulsar 1E1145.1-6141
P. S. Ray,D. Chakrabarty
Physics , 2002, DOI: 10.1086/344300
Abstract: Observations of the 297 s X-ray pulsar 1E1145.1-6141 with the Rossi X-Ray Timing Explorer have revealed its 14.4 d eccentric orbit around its B supergiant companion. The best-fit orbital elements are: P_orb = 14.365(2) d, a_x sin i=99.4(18) light-s, e=0.20(3). No eclipses are detected, indicating that the binary inclination is less than 55 deg.
Neutron Star Mass Measurements. I. Radio Pulsars
S. E. Thorsett,Deepto Chakrabarty
Physics , 1998, DOI: 10.1086/306742
Abstract: There are now about fifty known radio pulsars in binary systems, including at least five in double neutron star binaries. In some cases, the stellar masses can be directly determined from measurements of relativistic orbital effects. In others, only an indirect or statistical estimate of the masses is possible. We review the general problem of mass measurement in radio pulsar binaries, and critically discuss all current estimates of the masses of radio pulsars and their companions. We find that significant constraints exist on the masses of twenty-one radio pulsars, and on five neutron star companions of radio pulsars. All the measurements are consistent with a remarkably narrow underlying gaussian mass distribution, m = 1.35 +- 0.04 solar masses. There is no evidence that extensive mass accretion (delta m >~ 0.1 solar mass) has occurred in these systems. We also show that the observed inclinations of millisecond pulsar binaries are consistent with a random distribution, and thus find no evidence for either alignment or counteralignment of millisecond pulsar magnetic fields.
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