Haldane Exclusion Statistics and the Boltzmann Equation

We generalize the collision term in the one-dimensional Boltzmann-Nordheim transport equation for quasiparticles that obey the Haldane exclusion statistics. For the equilibrium situation, this leads to the ``golden rule'' factor for quantum transitions. As an application of this, we calculate the density response function of a one-dimensional electron gas in a periodic potential, assuming that the particle-hole excitations are quasiparticles obeying the new statistics. We also calculate the relaxation time of a nuclear spin in a metal using the modified golden rule.Comment: version accepted for publication in J. of Stat. Phy

Environmental Monitoring & Impact Assessment of Wasni (BK) Dam

Maharashtra is one of the Indian states mostly relying on agriculture. The Government of Maharashtra has been giving utmost importance for developing irrigation green fields. Under its efforts, the State has formulated a few Irrigation Development Corporation (VIDC) has been formulated for increasing irrigation potential of Vidharbha region of Maharashtra. VIDC has undertaken a few major, medium and minor irrigation projects based on the yields from catchment areas of respective projects. For the urban Indian, the word ?irrigation? conjures up images of first Prime Minister of India, Jawaharlal Nehru, and the Bhakra Nangal Dam (Temples of Modern India) and the tribal ousts of the Narmada dam. These are diverse perspectives on the story of large irrigation infrastructure in India. In fact, in popular public perception, irrigation connote ?large irrigation infrastructure? rather than provision of irrigation services. Agriculture is the backbone of Amravati district, in which the command area of Wasni project is an integral part. Most of the people are poor and economically backward. The proposed command area or its vicinities are devoid of any assured irrigation facility, through Sapan River potential for a medium project flows just adjacent to these areas, with its waters being unutilized. Because of the scarcity of the water there is a need to do socio-economic impact of Wasni(BK) dam

Abdominal sacrohysteropexy versus vaginal hysterectomy for pelvic organ prolapse in young women

Background: Pelvic organ prolapse (POP) is the descent of the pelvic organs beyond their anatomical confines. The definitive treatment of symptomatic prolapse is surgery but its management in young is unique due to various considerations. Aim of this study was to evaluate anatomical and functional outcome after abdominal sacrohysteropexy and vaginal hysterectomy for pelvic organ prolapse in young women.Methods: A total 27 women less than 35 years of age with pelvic organ prolapse underwent either abdominal sacrohysteropexy or vaginal hysterectomy with repair. In all women, pre-op and post-op POP-Q was done for evaluation of anatomical defect and a validated questionnaire was given for subjective outcome.Results: Anatomical outcome was significant in both groups as per POP-Q grading but the symptomatic outcome was better for sacrohysteropexy with regard to surgical time, bleeding, ovarian conservation, urinary symptoms, sexual function.Conclusions: Sacrohysteropexy is a better option

Comparative Financial Analysis of Construction Companies in India

In this study, the comparative financial analysis of construction companies of India is carried out. This analysis is done with the help of various financial ratios. These ratios will help in determining the performance of the companies with respect to the construction industry average of the country. Ratio Analysis presents a failure prediction model for the company based on the previous business data available. It is anticipated that Construction Company will be able to prevent business failures by using the result from the research. The Ratio Analysis on the construction companies of India has been performed, and their performances have been compared based on the standard ratios and Industrial performances over the years. The selection of the companies is based on their total assets, for the firms of ?Construction & Contracting ? Civil? category, which are HNB Engineers Pvt. Ltd., Gondwana Engineers Ltd. and Evergreen India Pvt. Ltd. Company?s performance has been compared on the basis of their financial performance taken from their balance sheets over the last 5 years. Their performances are then analyzed based on the financial ratios considered and thereby interpretations and recommendations are given. For a construction company, the fulfillment of short term obligations, their assets and liabilities lot depends on the availability of funds, which ultimately depends on the work, results and efficiency of the company. It overall showcases the causes of lack in financial performances of the company. Based on the interpretations from the analysis made, recommendations to companies has been given, clearly stating how the company should work on their non-performance in certain areas, which would help them in taking certain measures for their future progress and stability

New Source Term for QGP Formation in the Background-Field Model

We consider pair production in a space-time-dependent background field and derive a source term, i.e., production rate in the one-particle phase space. Such a source term is required in Boltzmann-equation-based models of quark-gluon plasma formation and evolution. We compare the source term derived here with the one that has been used in the literature so far. Significant differences are observed.Comment: 12 pages latex and 4 post-script figure

Molecular tailoring of thermoreversible copolymer gels: some new mechanistic insights

We earlier reported the role of hydrophobic and hydrogen bonding interactions on the transition temperatures of thermoreversible copolymer gels. We show here that the chemical structure of the hydrophobe and its concentration determine the transition temperatures [lower critical solution temperature (LCST)] and the heat of transition of new hydrophobically modified poly(N-isopropyl acrylamide) [PNIPAm] copolymer gels. The gels, prepared by copolymerizing NIPAm monomer with hydrophobic comonomers containing increasing lengths of alkyl side groups and a terminal carboxyl acid group, showed lower LCST and lower heat of transition when compared to pure PNIPAm gel. The experimental results were also compared with theoretical calculations based on a lattice-fluid-hydrogen-bond [LFHB] model. We show experimentally and theoretically that a linear correlation exists between the transition temperature and length of the hydrophobic alkyl side group. Also, in apparent contradiction to previous work, we found a reduction in the heat of transition with increasing hydrophobicity. We propose that the presence of the terminal carboxyl acid group on the hydrophobic side chain of the comonomer prevents the association of water molecules around the hydrophobe, thereby causing a reduction in the heat of transition. The LFHB model supports this argument

A modular positive feedback-based gene amplifier

<p>Abstract</p> <p>Background</p> <p>Positive feedback is a common mechanism used in the regulation of many gene circuits as it can amplify the response to inducers and also generate binary outputs and hysteresis. In the context of electrical circuit design, positive feedback is often considered in the design of amplifiers. Similar approaches, therefore, may be used for the design of amplifiers in synthetic gene circuits with applications, for example, in cell-based sensors.</p> <p>Results</p> <p>We developed a modular positive feedback circuit that can function as a genetic signal amplifier, heightening the sensitivity to inducer signals as well as increasing maximum expression levels without the need for an external cofactor. The design utilizes a constitutively active, autoinducer-independent variant of the quorum-sensing regulator LuxR. We experimentally tested the ability of the positive feedback module to separately amplify the output of a one-component tetracycline sensor and a two-component aspartate sensor. In each case, the positive feedback module amplified the response to the respective inducers, both with regards to the dynamic range and sensitivity.</p> <p>Conclusions</p> <p>The advantage of our design is that the actual feedback mechanism depends only on a single gene and does not require any other modulation. Furthermore, this circuit can amplify any transcriptional signal, not just one encoded within the circuit or tuned by an external inducer. As our design is modular, it can potentially be used as a component in the design of more complex synthetic gene circuits.</p

Nitramine Double Base Propellants

This review paper broadly covers the studies conducted on nitramine double base (DB) propellants, particularly in the field of formulations, evaluation, catalysis and combustion mechanism . Addition of RDX and HMX in double base matrix shows relatively low burn rates and high paper index values. Further, the burn rate of this class of propellants enhances in the presence of energetic binders/plasticisers like glycidyl azide polymer. This paper also discusses the combustion mechanism of HMX/RDX-based DB propellants, especially in the presence of catalytic salts. As scanty data is available on extruded nitramine DB propellants, further work is needed in the field of formulation as well as evaluation with a view to generate exhaustive data