48 research outputs found

    Physical process first law and caustic avoidance for Rindler horizon

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    We study the perturbation induced by a slowly rotating massive object as it passes through a Rindler horizon. It is shown that the passage of this object can be approximately modeled as Delta\,function type tidal distortions hitting the horizon. Further, following the analysis presented by Amsel, Marolf and Virmani related to the issue of the validity of physical process first law, we establish a condition on the size of the object so that this law holds for the Rindler horizon.Comment: 15 pages, 2 figure

    PASTA: Python Algorithms for Searching Transition stAtes

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    Chemical reactions are often associated with an energy barrier along the reaction pathway which hinders the spontaneity of the reaction. Changing the energy barrier along the reaction pathway allows one to modulate the performance of a reaction. We present a module, Python Algorithms for Searching Transition stAtes (PASTA), to calculate the energy barrier and locate the transition state of a reaction efficiently. The module is written in python and can perform nudged elastic band, climbing image nudged elastic band and automated nudged elastic band calculations. These methods require the knowledge of the potential energy surface (and its gradient along some direction). This module is written such that it works in conjunction with density functional theory (DFT) codes to obtain this information. Presently it is interfaced with three well known DFT packages: Vienna Ab initio Simulation Package (VASP), Quantum Espresso and Spanish Initiative for Electronic Simulations with Thousands of Atoms (SIESTA). This module is easily extendable and can be interfaced with other DFT, force-field or empirical potential based codes. The uniqueness of the module lies in its user-friendliness. For users with limited computing resources, this module will be an effective tool as it allows to perform the calculations image by image. On the other hand, users with plentiful computing resources (such as users in a high performance computing environment) can perform the calculations for large number of images simultaneously. This module gives users complete flexibility, thereby enabling them to perform calculations on large systems making the best use of the available resources

    Ni-based bimetallic heterogeneous catalysts for energy and environmental applications

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    Bimetallic catalysts have attracted extensive attention for a wide range of applications in energy production and environmental remediation due to their tunable chemical/physical properties. These properties are mainly governed by a number of parameters such as compositions of the bimetallic systems, their preparation method, and their morphostructure. In this regard, numerous efforts have been made to develop “designer” bimetallic catalysts with specific nanostructures and surface properties as a result of recent advances in the area of materials chemistry. The present review highlights a detailed overview of the development of nickel-based bimetallic catalysts for energy and environmental applications. Starting from a materials science perspective in order to obtain controlled morphologies and surface properties, with a focus on the fundamental understanding of these bimetallic systems to make a correlation with their catalytic behaviors, a detailed account is provided on the utilization of these systems in the catalytic reactions related to energy production and environmental remediation. We include the entire library of nickel-based bimetallic catalysts for both chemical and electrochemical processes such as catalytic reforming, dehydrogenation, hydrogenation, electrocatalysis and many other reactions

    Ambush Marketing-The Problem and the Projected Solutions <i style="">vis-a-vis</i> Intellectual Property Law-A Global Perspective

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    375-388 The problem of ambush marketing has been plaguing the organizers of various sporting and other events for the last four to five years. Due to the enormous financial losses caused by ambush marketing, the sponsors have been reconsidering the decisions to shell out astronomical sums for sponsoring various events. This paper analyses in great detail the concept of ambush marketing to its genesis, the various famous incidents of ambush marketing and the consequential losses and evaluates the existing intellectual property regime in combating this menace. It also analyses the various sui generis legislations framed by countries like South Africa and Australia to combat ambush marketing and tries to cull out a suitable anti-ambush marketing legislative policy for the Indian scenario. </smarttagtype

    The Broadening Horizons of Trademark Law -Registrability of Smell, Sports Merchandise and Building Designs as Trademarks

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    119-126With every passing day the ambit of trademark protection law is being broadened all over the world. This paper deals with three such important aspects – three new areas on which trademark protection is being envisaged, which have, of late, given rise to serious debate in juridical circles. To be more precise, this paper deals with the registrability of smell, sports merchandise and building designs as trademarks. The paper is exploratory in nature and does not take any stand as to whether a particular thing should be trademarkable or not. It rather culls out and analyses the arguments advanced for and against such broadening of trademark laws

    No hair theorems for static and stationary reflecting star

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    We prove the non existence of massive scalar, vector and tensor hairs outside the surface of a static and stationary compact reflecting star. Our result is the extension of the no hair theorem for black holes to horizonless compact configurations with reflecting boundary condition at the surface. We also generalize the proof for spacetimes with a positive cosmological constant.by Srijit Bhattacharjee and Sudipta Sarka

    Technology Transfer and the Intellectual Property Issues Emerging from It – An Analysis from a Developing Country Perspective

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    260-274The exploitation of technological knowledge is central to the development process. Less developed economies typically obtain this knowledge from more advanced ones rather than by creating it themselves. Transfer of technology is the transfer of a patent with respect to a particular product, which is patented. The product of technology is mixed up with the technology itself. No effort is made to make a distinction between the two. This paper attempts to clarify the meaning of technology transfer and what it actually transfers and elaborates on the modalities of technology transfer agreement and the various types of the same. It also deals with the situation where there is a loss of confidentiality and elaborates on its effect on the liabilities of the contracting parties in various jurisdictions. The article also attempts to deal with the various intellectual property issues involved in technology transfer and attempts to analyse things from a developing country perspective

    Dengue Virus: Epidemiology, Biology and Disease Aetiology.

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    Dengue is a vector-borne viral disease, caused by the Flavivirus, Dengue virus (DENV). About 400 million cases and 22000 deaths occur due to dengue throughout the world each year. It is reported in more than 100 countries in the tropics and subtropical regions. A positive-stranded enveloped RNA virus, DENV is principally transmitted by Aedes mosquitoes. It has four antigenically distinct serotypes DENV-1 to 4, with different genotypes, having three structural proteins and seven non-structural proteins. Clinical symptoms of dengue range from mild fever to severe Dengue Haemorrhagic Fever (DHF) or Dengue Shock Syndrome (DSS), with thrombocytopenia, leucopenia, and increased vascular permeability. Though primary infection causes activation of immune responses against that DENV serotypes, the severity of the disease in enhanced via heterotypic infection by various serotypes and also by antibody dependent enhancement (ADE). The first licensed DENV vaccine was tetravalent CYD Denvaxia, but it was not approved in all countries. Lack of suitable animal model, proper mechanistic study in pathogenesis and ADE, are the main hindrances in vaccine development. This review summarizes the current knowledge on DENV epidemiology, biology, disease etiology in the context of prevention and protection from dengue virus disease.The accepted manuscript in pdf format is listed with the files at the bottom of this page. The presentation of the authors' names and (or) special characters in the title of the manuscript may differ slightly between what is listed on this page and what is listed in the pdf file of the accepted manuscript; that in the pdf file of the accepted manuscript is what was submitted by the author
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