101,532 research outputs found
Characterization of cenosphere-reinforced vinyl ester composites
No full textVinyl ester resin particulate composite plates having varying loading of cenosphere (150 μm) were fabricated using highly polished glass plates as moulds. The addition of cenosphere in the vinyl ester matrix has a significant effect on thermal, mechanical and dielectric properties. From the thermogravimetric analysis of the composites, one can infer that both the thermal degradation mechanism and the rate of thermal degradation are not affected by the incorporation of cenospheres in the vinyl ester resin, which can be credited both to the high thermal stability and the chemical inertness of cenospheres. The high specific strength and the probable uniform distribution of the cenospheres in the cured matrix are found to have an impact on the mechanical properties (tensile strength and flexural modulus) of the composites, with the optimum strength being observed when the loading of cenospheres in the matrix is 2–7% of weight proportion. The inhomogeneity between the cenosphere and the vinyl ester matrix can be related to the variation in the dielectric breakdown strength and dielectric constant of the composite
Experimental results of microcontroller based FC-TSR-TCR systems / T. Vijayakumar and Dr. A. Nirmalkumar
No full textThis paper deals with the simulation and experimental results of Fixed Capacitor Thyristor switched Reactor Thyristor controlled reactor (FC-TSR-TCR) system. The FC-TSRTCR system is simulated using MATLAB and the simulation results are presented. The power and control circuits are simulated. Laboratory model for the FC-TSR-TCR system is implemented using Atmel microcontroller and it is tested. The current drawn by the FC-TSR-TCR varies with the variation in the firing angle. Stepped variation of current is obtained using thyristor switched reactor. The experimental results are compared with the simulation results
Design of an Interface for Page Rank Calculation using Web Link Attributes Information
No full textThis paper deals with the Web Structure Mining and the different Structure Mining Algorithms like Page Rank, HITS, Trust Rank and Sel-HITS. The functioning of these algorithms are discussed. An incremental algorithm for calculation of PageRank using an interface has been formulated. This algorithm makes use of Web Link Attributes Information as key parameters and has been implemented using Visibility and Position of a Link. The application of Web Structure Mining Algorithm in an Academic Search Application has been discussed. The present work can be a useful input to Web Users, Faculty, Students and Web Administrators in a University Environment.HITS, Page Rank, Sel-HITS, Structure Mining
Letter, [Author unclear] to Paulina T. Merritt
No full textHandwritten letter to Paulina Merritt from an unknown author, October 1, 1876.
Electronic theses and dissertations for Indian universities : a framework
No full textDigital libraries of electronic theses and dissertations (ETDs) offer an alternative to this waste of valuable academic scholarship and offer researchers and University Libraries in India opportunities to explore the possibilities electronic publishing trend in academic sector. The emergence of UGC Infonet, the aspiring and dream project of University Grants Commission, which also aims at Content Creation by Indian Academic Sector, will definitely boost this idea The idea of E- Theses and Dissertations (ETD) is coming up in International scenario, which can be easily located, readily accessible and delivered over the web. While describing a framework for Indian Universities to go zbout with creating their own Institutional Repositories of Theses and Dissertations, the paper also high lighten the Formats, Software and copyright issues related to ETD archiving. It suggests DSpace as the software
E-journals in a networked environment : its impact on academic libraries in the digital millennium
No full textThis paper tries to describe the Advantages of E-journals in terms of Accessibility, Speed distribution and production, Subscription Cost, Multimedia Capabilities, Internal and External Links etc and also tries to find out the Technological, Socio-cultural and Economic Barriers. The issues like Refereeing, Copyright and Licensing, Longevity and Storage and recent trends in E-journal publication and its implication on Academic Libraries in selection and acquisition, Cataloguing, archiving, user's access, training and support to staff and users are discussed in this paper
Indian academia on copyright and IPR issues of electronic theses and dissertations
No full textThe idea of E- Theses and Dissertations (ETD) is coming up in International scenario, which can be easily located, readily accessible and delivered over the web. This paper analyzing the opinions of selected Ph D Researchers and Guides from selected Indian Universities on Copyright and IPR issues related to ETDs. On the basis of the output, the paper suggests that Universities can start collecting e-format of theses, creating a digital archive for easy access. But in terms of access, still only a minimum majority is favoring online global access to Indian research. This may be because of Copy Right Issues, Chances of Plagiarism and Poor Quality in Research, which may be solved through policy frameworks and enhancing standards through national agencies like UGC at national level
Digital library development : major issues of externally published contents
No full textA library may procure contents in various sources and forms to service their clients. In the predominantly paper based erstwhile environment all these contents were put to
similar types of use, and copyright restrictions were imposed based on the quantum of pages copied etc. In the electronic and digital perspective, owners of information are resorting to punitive measures regarding the use and contents in digital form. Some of the constraints faced by our libraries to engage in serious digital initiatives are three fold that of money, manpower and contents. Most of our libraries, particularly in the higher
education and research institutes solely depend on the information providers and publishers in the developed world to satisfy their urge for vital contents that inspire
indigenous research. Since contents are a major ingredient in digital library development, the pragmatic and viable way out for libraries is to judiciously judge them
as available in electronic forms in optical media or on Web and procure at least some of them for hosting locally. This paper presents some of the major issues involved in such a critical activity with some illustrative examples available like IEE/IEEE Electronic Library, Indian Standards on CD-ROM, Science Direct and Web access of Indian Academy of Sciences journals. The justification for selecting external contents has also been mentioned. A detailed checklist for evaluating contents is presented from various angles, like authenticity of content, user interface, search and display capabilities,
documentation and technical support, and Media dependent features
Handwritten biographical information on Paulina T. McClung Merritt
No full textA handwritten biography of Paulina T. McClung Merritt by an unknown author, 1892.
Heterogeneous and tissue-specific regulation of effector T cell responses by IFN-gamma during Plasmodium berghei ANKA infection.
No full textIFN-γ and T cells are both required for the development of experimental cerebral malaria during Plasmodium berghei ANKA infection. Surprisingly, however, the role of IFN-γ in shaping the effector CD4(+) and CD8(+) T cell response during this infection has not been examined in detail. To address this, we have compared the effector T cell responses in wild-type and IFN-γ(-/-) mice during P. berghei ANKA infection. The expansion of splenic CD4(+) and CD8(+) T cells during P. berghei ANKA infection was unaffected by the absence of IFN-γ, but the contraction phase of the T cell response was significantly attenuated. Splenic T cell activation and effector function were essentially normal in IFN-γ(-/-) mice; however, the migration to, and accumulation of, effector CD4(+) and CD8(+) T cells in the lung, liver, and brain was altered in IFN-γ(-/-) mice. Interestingly, activation and accumulation of T cells in various nonlymphoid organs was differently affected by lack of IFN-γ, suggesting that IFN-γ influences T cell effector function to varying levels in different anatomical locations. Importantly, control of splenic T cell numbers during P. berghei ANKA infection depended on active IFN-γ-dependent environmental signals--leading to T cell apoptosis--rather than upon intrinsic alterations in T cell programming. To our knowledge, this is the first study to fully investigate the role of IFN-γ in modulating T cell function during P. berghei ANKA infection and reveals that IFN-γ is required for efficient contraction of the pool of activated T cells
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