113 research outputs found
Shear viscosity due to the Landau damping from quark-pion interaction
We have calculated the shear viscosity coefficient of the strongly
interacting matter in the relaxation time approximation, where a quasi particle
description of quarks with its dynamical mass is considered from NJL model. Due
to the thermodynamic scattering of quarks with pseudo scalar type condensate
(i.e. pion), a non zero Landau damping will be acquired by the propagating
quarks. This Landau damping may be obtained from the Landau cut contribution of
the in-medium self-energy of quark-pion loop, which is evaluated in the
framework of real-time thermal field theory
An Analysis of Rhythmic Staccato-Vocalization Based on Frequency Demodulation for Laughter Detection in Conversational Meetings
Human laugh is able to convey various kinds of meanings in human
communications. There exists various kinds of human laugh signal, for example:
vocalized laugh and non vocalized laugh. Following the theories of psychology,
among all the vocalized laugh type, rhythmic staccato-vocalization
significantly evokes the positive responses in the interactions. In this paper
we attempt to exploit this observation to detect human laugh occurrences, i.e.,
the laughter, in multiparty conversations from the AMI meeting corpus. First,
we separate the high energy frames from speech, leaving out the low energy
frames through power spectral density estimation. We borrow the algorithm of
rhythm detection from the area of music analysis to use that on the high energy
frames. Finally, we detect rhythmic laugh frames, analyzing the candidate
rhythmic frames using statistics. This novel approach for detection of
`positive' rhythmic human laughter performs better than the standard laughter
classification baseline.Comment: 5 pages, 1 figure, conference pape
I-Min: An Intelligent Fermat Point Based Energy Efficient Geographic Packet Forwarding Technique for Wireless Sensor and Ad Hoc Networks
Energy consumption and delay incurred in packet delivery are the two
important metrics for measuring the performance of geographic routing protocols
for Wireless Adhoc and Sensor Networks (WASN). A protocol capable of ensuring
both lesser energy consumption and experiencing lesser delay in packet delivery
is thus suitable for networks which are delay sensitive and energy hungry at
the same time. Thus a smart packet forwarding technique addressing both the
issues is thus the one looked for by any geographic routing protocol. In the
present paper we have proposed a Fermat point based forwarding technique which
reduces the delay experienced during packet delivery as well as the energy
consumed for transmission and reception of data packets.Comment: 11 Page
Alginate/hydrophobic HPMC (60L) particulate systems: new matrix for controlled release of diclofenac potassium
This work is focused on the development of a new particulate drug delivery system using sodium alginate (SA) and modified hydrophobic hydroxyl propyl methyl cellulose (HPMC, 60L grade) containing diclofenac as a model drug molecule for intestinal drug prolonged release. Diclofenac loaded HPMC-SA beads have been developed by ion exchange methods and were characterized by encapsulation efficiency, drug release profile, swelling and matrix erosion rate. Matrix swelling of calcium alginate beads induced by phosphate buffer ends up in erosion and destruction. However, for HPMC-SA beads do not lead to complete erosion, which may be the main cause of diclofenac retention within the matrix. The release of diclofenac potassium is negligible at acidic pH, while is complete in 5-6 h when pH is raised up to 7.4. The alginate/HPMC ratio controls the release rate of the drug. The drug release is decreased as the polymer concentration is increased from 2.5 to 3.5 %. Release kinetic study was done to understand the correlation between the formulations. The results show that drug release is diffusion controlled and it is Anomalous type which means combined process of both swelling and erosion of polymer.Colegio de Farmacéuticos de la Provincia de Buenos Aire
Study of Beta Equilibrated 2+1 Flavor Quark Matter in PNJL Model
We report a first case study of the phase diagram of 2+1 flavor strongly
interacting matter in equilibrium, using the
PolyakovNambuJona-Lasinio model. Physical characteristics of relevant
thermodynamic observables have been discussed. A comparative analysis with the
corresponding observables in the Nambu-Jona-Lasinio model is presented. We find
distinct differences between the models in terms of a number of thermodynamic
quantities like the speed of sound, specific heat, various number densities as
well as entropy. The present study is expected to give us a better insight into
the role that the superdense matter created in heavy ion collision experiments
play in our understanding of the properties of matter inside the core of
supermassive stars in the Universe
Alginate/hydrophobic HPMC (60L) particulate systems: new matrix for controlled release of diclofenac potassium
This work is focused on the development of a new particulate drug delivery system using sodium alginate (SA) and modified hydrophobic hydroxyl propyl methyl cellulose (HPMC, 60L grade) containing diclofenac as a model drug molecule for intestinal drug prolonged release. Diclofenac loaded HPMC-SA beads have been developed by ion exchange methods and were characterized by encapsulation efficiency, drug release profile, swelling and matrix erosion rate. Matrix swelling of calcium alginate beads induced by phosphate buffer ends up in erosion and destruction. However, for HPMC-SA beads do not lead to complete erosion, which may be the main cause of diclofenac retention within the matrix. The release of diclofenac potassium is negligible at acidic pH, while is complete in 5-6 h when pH is raised up to 7.4. The alginate/HPMC ratio controls the release rate of the drug. The drug release is decreased as the polymer concentration is increased from 2.5 to 3.5 %. Release kinetic study was done to understand the correlation between the formulations. The results show that drug release is diffusion controlled and it is Anomalous type which means combined process of both swelling and erosion of polymer.Colegio de Farmacéuticos de la Provincia de Buenos Aire
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