659 research outputs found
Meson decay in an independent quark model
Leptonic decay widths and leptonic decay constants of light vector mesons and
weak leptonic decay widths and weak decay constants of light and heavy
pseudoscalar mesons have been studied in a field- theoretic framework based on
the independent quark model with a scalar- vector power-law potential. The
results are in very good agreement with the experimental data.Comment: 13 page
FogGIS: Fog Computing for Geospatial Big Data Analytics
Cloud Geographic Information Systems (GIS) has emerged as a tool for
analysis, processing and transmission of geospatial data. The Fog computing is
a paradigm where Fog devices help to increase throughput and reduce latency at
the edge of the client. This paper developed a Fog-based framework named Fog
GIS for mining analytics from geospatial data. We built a prototype using Intel
Edison, an embedded microprocessor. We validated the FogGIS by doing
preliminary analysis. including compression, and overlay analysis. Results
showed that Fog computing hold a great promise for analysis of geospatial data.
We used several open source compression techniques for reducing the
transmission to the cloud.Comment: 6 pages, 4 figures, 1 table, 3rd IEEE Uttar Pradesh Section
International Conference on Electrical, Computer and Electronics (09-11
December, 2016) Indian Institute of Technology (Banaras Hindu University)
Varanasi, Indi
Probing Internal Stress and Crystallinity in Wet Foam via Raman Spectroscopy
In this article, we correlate the internal stress and the characteristics of
a vibrational mode in wet foam. Using microscope images, we estimate the
average size of the bubbles in wet foam, at specific time intervals, over a
duration of twenty four hours. Raman spectra are also recorded at the same time
intervals, over the same time frame. We show that the internal stress,
originated from the macroscopic structural change of foam with ageing, can be
related to the observed Raman shift of the low frequency methylene rocking mode
of the constituent surfactant molecules in foam. In this report we also show
the capability of the Raman spectroscopy to reveal the crystallinity in foamy
materials, when studied for a longer period of time.Comment: 16 pages, 7 figure
Interference of stochastic resonances: Splitting of Kramers' rate
We consider the escape of particles located in the middle well of a symmetric
triple well potential driven sinusoidally by two forces such that the potential
wells roll as in stochastic resonance and the height of the potential barrier
oscillates symmetrically about a mean as in resonant activation. It has been
shown that depending on their phase difference the application of these two
synchronized signals may lead to a splitting of time averaged Kramers' escape
rate and a preferential product distribution in a parallel chemical reaction in
the steady state
Characterization Of Glipizide-Loaded Polymethacrylate Microspheres Prepared By An Emulsion Solvent Evaporation Method
Purpose: The purpose of the present investigation was to formulate and evaluate microencapsulated glipizide produced by the emulsion – solvent evaporation method,
Method: Microspheres were prepared using polymethacrylate polymers (Eudragit® RS 100 and RL 100) by solvent evaporation method and characterized for their micromeritic properties and drug loading, as well as by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy. In vitro release studies were performed in phosphate buffer (pH 7.4).
Result: The resulting microspheres obtained by solvent evaporation method were white and free flowing in nature. The mean particle size of microspheres ranged from 420 - 660 μm and the encapsulation efficiencies ranged from 40.27 - 86.67 %. The encapsulation efficiency was also found to be dependant on nature of polymer used in the formulation. The infrared spectra confirmed the stable character of
glipizide in the drug-loaded microspheres. Scanning electron microscopy revealed that the microspheres were spherical in nature. From the in vitro drug dissolution studies it was found that the sustaining effect of microspheres depended on the polymer concentration, amount of dispersant used and the type of polymer used in the formulation. The mechanism of drug release from the microspheres was found to be non-Fickian type.
Conclusion: Eudragit® microspheres containing glipizide could be prepared successfully by using an emulsion solvent evaporation technique using polymethacrylate polymers, which will not only sustain the release of drug but also manage the complicacy of the diabetes in a better manner. Keywords: glipizide, Eudragit®, microspheres, controlled release, polymethacrylate.Tropical Journal of Pharmaceutical Research Vol. 7 (1) 2008: pp. 879-88
Evolution of Generalized Brans-Dicke parameter within a Superbounce scenario
We have studied a superbounce scenario in a set up of Brans-Dicke (BD)
theory. The BD parameter is considered to be time dependent and is assumed to
evolve with the Brans-Dicke scalar field. In the superbounce scenario, the
model bounces at an epoch corresponding to a Big Crunch provided the ekpyrotic
phase continues until that time. Within the given superbounce scenario, we
investigate the evolution of the BD parameter for different equations of state.
We chose an axially symmetric metric that has an axial symmetry along the
x-axis. The metric is assumed to incorporate an anisotropic expansion effect.
The effect of asymmetric expansion and the anisotropic parameter on the
evolving and the non-evolving part of the BD parameter is investigated.Comment: 10 pages, 5 figures, accepted version of the journal Symmetr
- …