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Pandit P.,Devi Ahilya University | Banerjee M.,Devi Ahilya University | Mukherjee G.S.,Defence Scientific Information and Documentation Center | Parikh R.,Raja Ramanna Center for Advanced Technology | And 2 more authors.
Defence Science Journal | Year: 2014

Poly (L lactic acid) (PLLA) ultrathin films of various thicknesses were prepared by spin coating method and investigated by using vibrational spectroscopic techniques such as FTIR and Raman. The analysis has been done in two parts: first one is verification of structural mode to understand the visibility of characteristic band to confirm the PLLA structure; where interestingly, as the thickness of the film increased, the structural features were found to be more explicit. The second part of the study was to observe the features of the film having been annealed for 1 h in two separate temperatures, one at specific annealing temperature 120 °C and the other at 160 °C to enable PLLA chains to reorient to get crystallized from its soften state at two such specific temperatures. The isothermal crystallization behavior of PLLA film at 120 °C and 160 °C from the melt was monitored by FTIR as well as Raman spectroscopies. More importantly, the band at 921 cm-1 corresponds to α crystalline phase of PLLA has been observed even in this ultrathin film with the effective application of temperature as selected in this study. © 2014, DESIDOC. Source


Sachdev P.,Devi Ahilya University | Banerjee M.,Devi Ahilya University | Mukherjee G.S.,Defence Scientific Information and Documentation Center
Defence Science Journal | Year: 2014

In this paper, we report the embedment of Cobalt (Co) nanoparticles by ion beam sputtering (IBS) in poly(vinyl alcohol) (PVA) substrate to prepare nanocomposite film. The Co film of 5 nm was deposited on PVA by IBS technique. Formation of nanocrystalline Co with hcp phase is revealed in GIXRD pattern of the film which also indicates that there is no change in the crystalline structure of PVA even after sputtering of the metallic nanoparticles. The average particle size of Co nanoparticles as evaluated using Scherer formula is found to be about 2 nm. UVVis absorption spectrum of the film showed SPR peaks of Co metal in their nano size level embedded in the PVA matrix system. XPS study confirms the metallic nature of Co MOKE studies show that the nanocomposite film is ferromagnetic with Hc of. 42.8 Oe. © 2014, DESIDOC. Source


Pant A.,Defence Scientific Information and Documentation Center
Electronic Library | Year: 2015

Purpose - The paper aims to evaluate the usability of the website of Central Science Library (CSL), University of Delhi. Multi-method approach of evaluation is used with the use of standard checklist and questionnaire survey of representative users. Besides, the information architecture of the website under study is analysed in this paper. Design/methodology/approach - Based on the literature review and the author's experience, a usability assessment tool for library websites was developed by Pant (2013). It comprises standard checklist and questionnaire for users' survey. In the present study, this framework was used to assess the usability of CSL website. The questionnaire survey of 35 representative users was conducted through random sampling. The results of both methods (standard checklist and questionnaire survey) were analysed for evaluating the website usability. Findings - Need for improvement of the website was realised in terms of efficiency, effectiveness and learnability for better usability. Notice board, site search facility, list of services, FAQs and user guides were the most sought after features among others as per the analysis of the questionnaire survey. Besides, the need to enhance the visual appeal of the website was felt. However, information resources provided through the CSL website were found useful for users. Originality/value - The paper presents an innovative multi-method approach of website usability assessment while considering six usability attributes: Usefulness, Efficiency, Effectiveness, Learnability, Satisfaction and Accessibility. The approach adopted in this paper is cost effective in comparison to formal usability tests and heuristic evaluation. Therefore, this framework is suitable for libraries having limited budget to ensure the user-centred library website with maximum usability. This paper encourages other libraries to conduct similar website usability evaluation to identify the usability problem areas and users' perception for their respective website. © 2015 Emerald Group Publishing Limited. Source


Pant A.,Defence Scientific Information and Documentation Center | Moorthy A.L.,BrahMos Aerospace Pvt Ltd
Annals of Library and Information Studies | Year: 2013

Traditional knowledge (TK) is the knowledge base of a particular society or community which has been generated over a period of time through the process of learning and sharing by its members. TK is time tested and has been playing a vital role in sustainable development of the indigenous communities. Commercialization of biodiversity and traditional knowledge has increased the threat of misappropriation. Indian cultural and scientific heritage is discussed in this paper. Proper KM practices are required to tap that knowledge. This paper highlights the need to develop an Indigenous Knowledge Management System (IKMS) for indigenous communities which should document the knowledge heritage (without jeopardizing local culture, societal practices, IPRs, etc.) and it should also improve the process of adaptation, adoption and experimentation of the traditional knowledge. To develop an IKMS, various types of knowledge management tools and platforms are discussed. This paper also highlights the major issues/challenges in management of traditional knowledge. Source


Moorthy A.L.,Defence Scientific Information and Documentation Center | Pant A.,Defence Scientific Information and Documentation Center
Annals of Library and Information Studies | Year: 2012

Resource sharing amongst libraries is a good old practice that is aimed at overcoming budgetary constraints. The new millennium saw quite a few number of Library Consortia established in the country, NKRC of CSIR and INDEST being the most successful of them. After taking in to consideration the experiences of these and other Library Consortia that are successfully serving their users, DRDO E-Journals Consortium was established by DESIDOC in the year 2009 with 7 core publishers. This paper briefly discusses the genesis of the DRDO Consortium, its services, budgetary provisions, services offered, and efforts made by DESIDOC to enhance the use of e-resources across the Organisation. An analytical study of the usage of e-resources by the DRDO scientific community was also made and the inferences were listed. Overall the Consortium has been perceived as a major facilitator in providing required information within least possible time. Source

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