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Nonlinear Blind Equalizers: NCMA and NMCMA  [PDF]
Donglin Wang, Sandeep Chandana
Int'l J. of Communications, Network and System Sciences (IJCNS) , 2010, DOI: 10.4236/ijcns.2010.36070
Abstract: This paper proposes two nonlinear blind equalizers: the nonlinear constant modulus algorithm (NCMA) and the nonlinear modified constant modulus algorithm (NCMA) by applying a nonlinear transfer function (NTF) into constant modulus algorithm (CMA) and modified constant modulus algorithm (MCMA), respectively. The effect of the NTF on CMA and MCMA is theoretically analyzed, which implies that the NTF can make their decision regions much sharper so that the proposed two nonlinear blind equalizers are more robust against the convergency error compared to their linear counterparts. The embedded single layer in NCMA and NMCMA simultaneously guarantees a comparably speedy convergency. On 16-quadrature amplitude modulation (QAM) symbols, computer simulations show that NCMA achieves an 8dB lower convergency mean square error (MSE) than CMA, and NMCMA achieves a 15dB lower convergency MSE than MCMA.
Colchicine in dermatology
Konda Chandana,Rao Angoori
Indian Journal of Dermatology, Venereology and Leprology , 2010,
Abstract:
The role of Anopheles merus in malaria transmission in an area of southern Mozambique
Nelson Cuamba,Chandana Mendis
Journal of Vector Borne Diseases , 2009,
Abstract:
Single-file diffusion and kinetics of template assisted assembly of colloids
Chandana Mondal,Surajit Sengupta
Physics , 2011, DOI: 10.1103/PhysRevE.85.020402
Abstract: We report computer simulation studies of the kinetics of ordering of a two dimensional system of particles on a template with a one dimensional periodic pattern. In equilibrium one obtains a re-entrant liquid-solid-liquid phase transition as the strength of the substrate potential is varied. We show that domains of crystalline order grow as $\sim t^{1/z}$, with $z \sim 4$ with a possible cross-over to $z \sim 2$ at late times. We argue that the $t^{1/4}$ law originates from {\em single-file} motion and annihilation of defect pairs of opposite topological charge along channels created by the template.
Polymorphism, thermodynamic anomalies and network formation in an atomistic model with two internal states
Chandana Mondal,Surajit Sengupta
Physics , 2011, DOI: 10.1103/PhysRevE.84.051503
Abstract: Using molecular dynamics simulations we study the temperature-density phase diagram of a simple model system of particles in two dimensions. In addition to translational degrees of freedom, each particle has two internal states and interacts with a modified Lennard-Jones potential which depends on relative positions as well as the internal states. We find that, despite its simplicity, the model has a rich phase diagram showing many features of common network-forming liquids such as water and silica, including polymorphism and thermodynamic anomalies. We believe our model may be useful for studies concerning generic features of such complex liquids.
An integrodifferential equation driven by fractional Brownian motion
Hakima Bessaih,Chandana Wijeratne
Mathematics , 2011,
Abstract: This paper deals with the well posedness of an integrodifferential equation that describes a vortex filament associated to a 3D turbulent fluid flow. This equation is driven by a fractional Brownian motion of Hurst parameter H>1/2. We prove global existence and uniqueness of solutions in a functional space of Sobolev type.
Phylogeny derived from homodimeric endonuclease correlates with its pre-RNA substrates  [PDF]
Sanga Mitra, Smarajit Das, Satyabrata Sahoo, Chandana Sinha, Jayprokas Chakrabarti
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.23018
Abstract: Amongst endonuclease, the homodimeric variety is found in many prokaryotes for processing of the introns out from pre-RNAs. But as the variety and the complexity of introns rise with evolution, do the homodimeric endonuclease adapt to the changes? The correlations between evolving pre-RNAs and adapting homodimeric endonuclease in lower prokaryotes is investigated in this paper. First, we construct and observe the appearance of a long branch in the phylogeny based on homodimeric endonuclease. To appreciate the finer aspects of accelerating evolution near this long branch, we delve deeper into the pre-RNA substrates of the endonuclease. Computational evidence of an as-yet-unreported noncoding RNA gene then emerges from this study. The capabilities of homodimeric endonuclease and the complexities of its pre-RNA substrates appear to evolve in steps together.
Statistical optimization of process variables by response surface methodology to enhance phenol degradation by Pseudomonas putida (NCIM 2102)  [PDF]
Velluru Sridevi, M. V. V Chandana Lakshmi, A. V. N Swamy, M Narasimha Rao
Advances in Bioscience and Biotechnology (ABB) , 2011, DOI: 10.4236/abb.2011.24028
Abstract: Removal efficiency of phenol from aqueous solutions was determined using Pseudomonas putida (NCIM 2102). Experiments were made as a function of pH (4 - 9), temperature (28 - 36oC), and agitation speed (100 - 200 rpm). Optimization of these three process parameters for phenol degradation was studied. Statistically designed experiments using response surface methodology was used to get more information about the significant effects and the interactions between these three parameters. A 23 full-factorial central composite design was employed for experimental design and for analysis of the results. A second order polynomial regression model, has been developed using the experimental data. It was found that the degrading potential of P.putida (NCIM 2102) was strongly affected by the variations in pH, temperature and agitation speed. The experimental values were in good agreement with the predicted values and the correlation coefficient was found to be 0.9871. The optimum process conditions for maximizing phenol degradation were recognized as follows: pH (7.49), temperature (29.99oC), and agitation speed (138.89) rpm.
Modulation of immunity in young-adult and aged squirrel, Funambulus pennanti by melatonin and p-chlorophenylalanine
Seema Rai, Chandana Haldar, Rajesh Singh
Immunity & Ageing , 2009, DOI: 10.1186/1742-4933-6-5
Abstract: Aged squirrel presented reduced immune parameters (i.e. total leukocyte count (TLC), Lymphocytes Count (LC), % stimulation ratio of splenocytes (% SR) against T cell mitogen concanavalin A (Con A), delayed type hypersensitivity (DTH) to oxazolone) when compared to young adult group. Melatonin administration (25 μg/100 g body mass/day) significantly increased the immune parameters in aged more than the young adult squirrel while PCPA administration (4.5 mg/100 g body mass/day) reduced all the immune parameters more significantly in young than aged. Combination of PCPA and melatonin significantly increased the immune parameters to the normal control level of both the age groups. TBARS level was significantly high in aged than the young group. PCPA treatment increased TBARS level of young and aged squirrels both while melatonin treatment decreased it even than the controls. Nighttime peripheral melatonin level was low in control aged group than the young group. Melatonin injection at evening hours significantly increased the peripheral level of nighttime melatonin, while combined injection of PCPA and melatonin brought it to control level in both aged and young adult squirrels.PCPA suppressed immune status more in aged than in adult by reducing melatonin level as it did chemical Px. Melatonin level decreased in control aged squirrels and so there was a decrease in immune parameters with a concomitant increase in free radical load of spleen. Decreased immune status can be restored following melatonin injection which decreased free radical load of spleen and suggest that immune organs of aged squirrels were sensitive to melatonin. Increased free radical load and decreased peripheral melatonin could be one of the reasons of immunosenescence.Melatonin (N-acetyl-5-methoxytryptamine) is synthesized mainly in pineal gland. It plays a major role in regulating sexual maturity, reproductive cycle, stress and the immune responses [1-3]. On the other hand, it has also been observe
Strong and Electromagnetic Mass Splittings in Heavy Mesons
Goity, Jose L.;Jayalath, Chandana P.
High Energy Physics - Phenomenology , 2007, DOI: 10.1016/j.physletb.2007.04.037
Abstract: The contributions to heavy meson mass differences by the strong hyperfine interaction, the light quark masses and the electromagnetic interaction are obtained from the empirical values of the $D$, $D^*$, $B$ and $B^*$ masses by means of a mass formula based on the heavy quark mass expansion. The three different types of contributions are determined with significant accuracy to next to leading order in that expansion.
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