Online access to DRDO periodicals using open source software

Defence Scientific Information and Documentation Centre (DESIDOC) is a nodal centre for information communication and dissemination in the Defence Research & Development Organization (DRDO). As the publication wing of DRDO, DESIDOC brings out regular publications including Defence Science Journal, DESIDOC Bulletin of Information Technology, DRDO Newsletter, DRDO Samachar and Technology Focus. These periodicals cover a wide variety of topics in various subject areas targeting different user communities situated all over India. A pilot project was undertaken with an aim to provide online desktop access to the full text of these periodicals to the users including R&D scientists of more than 50 laboratories and establishments. The project also aimed at facilitating the Publications Division to directly upload the contents to the system. The open source software EPrints is used and customized according to the user requirements particularly on Intranet. Upon successful testing and evaluation, these periodicals will be hosted on Internet allowing subscription, access and downloading by users across the globe. This paper discusses the experience in using EPrints and customization at various levels for DRDO publications and explains various features of the model

Information technologies for libraries and information centres

For the past few years, the tremendous strides taken in the fields of information technologies have changed the society into an information conscious society. There is little doubt that the impact of these technologies on the day-to-day functions of information centres is an everlasting one. The innumerable advances in different fields such as computers, communi- cations, electronic mail, voice mail, teletext, videotext, telefax, videodisc, CD-ROM, electronic publishing, etc have left no area in the library, and information field immune for their application. And many areas still remain undiscovered. This paper, first in a series, makes an attempt to overview the impact of the information technologies on the library and information services. A brief discussion of electronic message and documentdelivery systems,and electronic mail are also presented

Modes of Parasitism between the Necrotrophic Fungus Botrytis cinerea and Trichoderma spp

This study aims to understand the differential antagonistic activity of the Trichoderma spp. against Botrytis cinerea (grey mould) on tomato plants. The antagonistic efficiency between Botrytis cinerea and Trichoderma spp. viz., Trichoderma reesei, Trichoderma viride, Trichoderma harzianum, Trichoderma hamatum, Trichoderma longibractum were studied in vitro using dual plate technique. The results revealed that all of the Trichoderma isolates had the ability to inhibit the mycelial growth of grey mould. The percentage reduction in the growth of B. cinerea after seven days of incubation at 23 ± 2ºC varied between 35-84%. The Trichoderma spp. such as T. reesei (A1) and T.harzianum (E1) showed the highest antagonistic activity (T. reesei (A1) – 84%; T. harzianum (E1) – 72.8%). SEM studies at cellular level have shown the collapse of hyphal wall of B. cinerea at an early stage. Clear evidence on direct parasitism was recorded on most of the Trichoderma spp. tested in this experiment. In bioassay experiments, B. cinerea applied alone was found throughout the leaf tissues in high densities after an incubation period of five days at 18°C in a moist chamber rather than when pathogen and antagonists were applied together. Based on previous records of Trichoderma spp., biocontrol potential and observations of its colonizing properties, it appears that          T. reesei can compete and reduce the growth of B. cinerea in tomato plants at an early stage and enhance the growth of the plants. Keywords: Biological control, antagonistic potential, cell damage, grey mould, Trichoderma spp

Minimization of power loss in newfangled cascaded H-bridge multilevel inverter using in-phase disposition PWM and wavelet transform based fault diagnosis

AbstractNowadays multilevel inverters (MLIs) have been preferred over conventional two-level inverters due to reduced harmonic distortions, lower electromagnetic interference, and higher DC link voltages. However, the increased number of components, complex PWM control, voltage-balancing problem, and component failure in the circuit are some of the disadvantages. The topology suggested in this paper provides a DC voltage in the shape of a staircase that approximates the rectified shape of a commanded sinusoidal wave to the bridge inverter, which in turn alternates the polarity to produce an AC voltage with low total harmonic distortion and power loss. This topology requires fewer components and hence it leads to the reduction of overall cost and complexity particularly for higher output voltage levels. The component fault diagnostic algorithm is developed using wavelets transform tool. Finally an experimental prototype is developed and validated with the simulation results

Aerosol characteristics at a remote island: minicoy in southern Arabian sea

Extensive measurements of aerosol optical and microphysical properties made at a remote island, Minicoy in southern Arabian Sea for the period (February 2006-March 2007) are used to characterize their temporal variability and Black Carbon (BC) mass mixing ratio. Large decrease in aerosol BC (from ~800 ng m-3 to ~100 ng m-3) was observed associated with change in airmass characteristics and monsoon rains. The total aerosol mass varied between ~80 and 20 μg m-3. Though the total mass fell drastically, a slight increase in super micron mass was observed during the June-August period associated with high winds. The mass fraction of Black Carbon aerosols during the prevalence of continental airmass is found to be ~1.2% of the composite aerosols, which is much lower than the values reported earlier for this region

Eddy Current Testing of Zirconium Wires

FUEL bundles for Rajasthan Atomic Power Reactor, as per the design, consist of a cluster of 19 elements held together by zircaloy end plates and spaced by wire helices on the six elements of the inner ring and alte-rnate elements of the outer ring. Each element is a zircaloy-2 tube 495 min long,1524 mm in diameter and of 0.4 nom wall thickness containing the nuclear fuel in the form of sintered uranium dioxide pellets and sealed at both ends. In order to provide the required spacing between the elements, zircaloy wire of 1.25 mm dia. is spot-welded around the elements in the helix form. The wire helices serve to separate the elements to maintain the dimensions of the coolant sub-channels between them and to increase the mixing of coolant between inner and outer sub-channels. Zircaloy wire of 1.63 mm dia. is spot-welded on the outer elements so as to provide bearing surfaces for the bundle when it moves through the fuel channels in the coolant assemblies

Enhancement of the Power Output of Photogalvanic Cells

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Personality profile and Stressful Life Events in Alcohol Relapse Patients.

INTRODUCTION: Alcohol dependence is characterised by craving, compulsion, primacy Of drinking over other activities and a state of neuronal adaptation leading to Physical and mental disturbances on withdrawal. One of the most important Problems in recovery from alcohol and substance abuse is relapse. Clinicians Must always realize and be aware that relapse is a distinct possibility which can Happen to anyone who is and has been dependent on alcohol. About 70 to 90% Of clients with alcohol dependence relapse within three months. (Mc Lellan Et al., 2000). Relapse can be better understood as resulting from an interaction of Client-,family-,social-, and treatment related factors. Researches into the causes Of relapse led to classifying relapse determinants into two broad categoriesintrapersonal And interpersonal determinants. Personality traits are an important Intrapersonal determinant of relapse (Sandahl C, 1984). PERSONALITY AND ALCOHOL RELAPSE Allport defined personality as “the dynamic organization within the Individual of those psychosocial systems that determine his unique adjustment To his environment”. Since long it has been hypothesized that personality bears a two way Relationship with relapse. This relationship has been a topic of continuing Debate and has led to varied and inconclusive results. Theories favouring the existence of a separate ‘alcoholic personality’ Have not stood the test of time. However persons with certain personality traits Are more prone for relapse. Neuroticism, novelty seeking, low ego strength and High ergic tension are the variables commonly associated with alcohol relapse When compared with abstaining individuals albeit inconsistently. Adherence to psychosocial interventions, coping skills, attitude towards Recovery and self perception of the ability to withstand stress are important Variables which depend heavily on personality traits of the individuals. Relapse prevention and its treatment form an integral part of Management of alcohol dependence as relapse is a part of the chronic course of The illness. Relapse prevention strategies incorporate various psycho social Interventions and specific coping skills training in the treatment modality. STRESSFUL LIFE EVENTS AND ALCOHOL RELAPSE Stress is considered a major contributor to the continuation of alcohol Use as well as relapse. The notion that stressful life events can cause susceptible People to relapse to alcohol use has an intuitive appeal. Many studies that have Determined an association between substance use and stress have been unable To establish a causal relationship between the two. While theoretical and Methodological ambiguities have resulted in inconsistent empirical support of The relationship between personally experienced stress and return to drinking (Allan and Cooke, 1985; Hall et al., 1990), findings indicate that personally Threatening and chronic life stressors elevate the risk for relapse (Brown et al., 1990). Studies are inconsistent regarding the ‘tension reduction hypothesis’ Which posits that people use and relapse to alcohol in order to reduce stress. However alcohol dependent individuals frequently experience stress related to Occupational, legal, social and financial problems and negative events in their Life predicted relapse to alcohol use more than positive life events. Hence the Study of interactions between stressful life events and alcohol relapse has Widespread implications for both assessment and treatment of the patients

Aerosol properties and BC mass mixing ratios over the Arabian Sea during ARMEX 2004

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