127 research outputs found
The nucleation of self-poled electroactive β-phase in Eu3+ doped PVDF nanocomposite film for optoelectronic devices
No full textPre-heating in the framework of massive gravity
No full textAbstractIn this paper we propose a mechanism of natural pre-heating of our universe by introducing an inflaton field dependent mass term for the gravitational wave for a specific class of massive gravity theory. For any single field inflationary model, the inflaton must go through the oscillatory phase after the end of inflation. As has recently been pointed out, if the gravitational fluctuation has inflaton dependent mass term, there will be a resonant amplification of the amplitude of the gravitational wave during the oscillatory phase of inflaton. Because of this large enhancement of the amplitude of the gravitational wave due to parametric resonance, we show that universe can naturally go through the pre-reheated phase with minimally coupled matter field. Therefore, during the reheating phase, there is no need to introduce any arbitrary coupling between the matter field and the inflaton
Masterguide to Maity & Ghosh's integral calculus including differential equations
No full textPenned with utmost care for the undergraduate students of Mathematics of all major universities, this book can be treated as a remarkable combination of erudite scholarship and educational utility. Now Dr K C Pal, the author, known for his unique and student-friendly teaching methods, has come up with this invaluable text as a long-awaited extension of the original book
Colloidal silver nanoparticles prepared by UV-light induced citrate reduction technique for the quantitative detection of uric acid
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Study of Local Non-reflective Boundary Condition on Soil Domain
No full textAbstractThis paper presents a computational (finite element analysis) study for numerically simulating the elastic wave propagation problem in a two-dimensional homogeneous half space. The theoretical formulations of development and implementation of local non-reflecting boundary condition (NRBC) at the soil truncated boundaries has been discussed in detail. A dynamic analysis of the elastic soil domain using time marching scheme has been carried out and comparative studies of the responses from different boundary conditions at the truncated boundaries also has been provided to get the physical idea of the wave reflection phenomena and its absorption capability using NRBCs. The results justify the utility of implementing the local types of NRBC's on the truncated boundaries of the soil domain for solving coupled dynamic problems
Author response
No full textBinding of antigen to the B cell antigen receptor (BCR) initiates a multitude of events resulting in B cell activation. How the BCR becomes signaling-competent upon antigen binding is still a matter of controversy. Using a high-resolution proximity ligation assay (PLA) to monitor the conformation of the BCR and its interactions with co-receptors at a 10–20 nm resolution, we provide direct evidence for the opening of BCR dimers during B cell activation. We also show that upon binding Syk opens the receptor by an inside-out signaling mechanism that amplifies BCR signaling. Furthermore, we found that on resting B cells, the coreceptor CD19 is in close proximity with the IgD-BCR and on activated B cells with the IgM-BCR, indicating nanoscale reorganization of receptor clusters during B cell activation
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