Institutional Repositories in India: A Case Study of National Aerospace Laboratories

This paper traces the history and developments in Open Archives Initiatives including open access journals, e-print archives and Institutional repositories. The setting up of NAL’s Institutional Repository using OSS GNU Eprints, document types with statistical analysis, country wise statistics of full text download, levels of accessibility and technologies used in building the Institutional Repository have been discussed at lengt

Electrically modulated photoluminescence in ferroelectric liquid crystal

Electrical modulation and switching of photoluminescence (PL) have been demonstrated in pure deformed helix ferroelectric liquid crystal (DHFLC) material. The PL intensity increases and peak position shifts towards lower wavelength above a threshold voltage which continues up to a saturation voltage. This is attributed to the helix unwinding phenomenon in the DHFLC on the application of an electric field. Moreover, the PL intensity could be switched between high intensity (field-on) and low intensity (field-off) positions. These studies would add a new dimension to ferroelectric liquid crystal's application in the area of optical devices.Comment: 4 figure

Stock assessment of the demersal offshore fishery resources off the Karnataka coast

The total biomass of the demersal stocks in the depth range of 30-200m between 12°401 and 15°N latitudes in the Indian Exclusive Economic Zone is estimated to be a:round 1,23,000 metric tons (t). There is scope for doubling the present catch of about 40,000 t from demersal resources by extending exploitation to 50-200m depth zone. About 78% of this increase is expected to come from four species, namely, Nemipterus japonicus, Priacanthus macracanthus, Saurida tumbil and Arius spp

Population dynamics of penaeid prawn Penaeus merguiensis off Mumbai coast

Stock dynamics of Penaeus merguiensis was studied using length composition data collected separately for males and females during the period 1995-1998, at New Ferry Warf landing, centre in Greater Mumbai. Food and feeding, sex ratio, fecundity and length-weight relationships were worked out on a representative sub-sample. Asymptotic length (Loo) and growth coefficient (K) were estimated to be 220 mm and 1.80 per annum respectively for males. These parameters were respectively 281 mm and 1. 72 per annum in the case of females. The instantaneous rate of total mortality coefficient (Z) was found to be 9.79 and 7.44 per annum for males and females respectively. The annual natural mortality coefficient (M) was estimated to be 2.80 for males and 2.60 for females. As the exploitation ratio exceeded 0.5 in the case of both the males and females, the study suggests the necessity for reduction in fishing pressure in order to achieve Maximum Sustainable Yield (MSY)

Estimation of fishing mortality and migration coefficient of the fishery of juvenile Macrobrachium rosenbergii from Kalu River in Maharashtra

The freshwater prawn, Macrobrachium rosenbergii breeds in estuaries and the juveniles after completion of their larval stage start their upward migration towards rivers. It is at this stage fishing of juveniles takes place in river mouths. Kalu River near Titwala, in Maharashtra is estimated based on data presented by Indulkar and Shirgur (1995) for 1991 and 1992 fishing seasons. The fishing mortality was estimated to be 1.50 and 1.28 for a fishing season of 3 months in 1991 and 1992 respectively, while the migration coefficient was computed to be 3.53 during the fishing season. As the average exploitation rate during the study period was only 0.24, the juveniles are not heavily fished and there is a scope for almost doubling the present catch to about 4 million seeds per fishing season

Effect of cadmium telluride quantum dots on the dielectric and electro-optical properties of ferroelectric liquid crystals

We present here the dielectric and electro-optical studies of cadmium telluride quantum dots (CdTe QDs) doped ferroelectric liquid crystals (FLCs). It has been observed that the doping of CdTe QDs not only induced a pronounced memory effect but also affected the physical parameters of FLC material (LAHS19). The modifications in the physical parameters and memory effect of LAHS19 are found to depend on the concentration ratio of CdTe QDs. The lower concentration of CdTe QDs (1–3 wt%) enhanced the values of spontaneous polarization and rotational viscosity of LAHS19 material but did not favor the memory effect, whereas a higher concentration of CdTe QDs (>5 wt%) degraded the alignment of LAHS19 material. The doping of ∼5 wt% of CdTe QDs is found to be the most suitable for achieving good memory effect without significantly affecting the material parameters

Indian Shrimp Trade: Reflections and Prospects in the Post-WTO Era

Indian fisheries sector in view of its potential contribution to national income, nutritional security, employment opportunities, social objectives, and export earnings plays an important role in the 50cio~economic development of the country. The marine products exports contributed a whopping 7245 crofes of foreign exchange to the exchequer during 2005- 2006, which is onethird of the total agricultural exports and 1.5 percent of the total GDP. Shrimps continue to be the predominant item in our. marine export claiming about 29 and 67 percent in quantity and value tenns share, respectively. Until recently, India depended heavily on one product (shrimp) and one market (Japan) for its marine products export and thus there is a need for product and market diversification

Fisheries Project Formulation and Management

Project formulation is an important part of entrepreneurship development. Fisheries sector, hosting a gamut of entrepreneurship venture, requires technical know-how in project formulation and management. Keeping this in mind, my colleagues Mr. Shyam S. Salim, Scientist and Dr. R. S. Biradar, Principal Scientist of Fisheries Informatics, Technology Evaluation and Transfer Division of this Institute have written a course manual on "FISHERIES PROJECT FORMULA TlON AND MANAGEMENT' in a simple and systematic manner to cater to the requirements and expectations of students of fishery science. The manual contains basic concepts and applications, which are necessary to understand and practice the subject

Mortality estimates of Indian ribbon fish Trichiurus lepturus off Maharashtra coast

In view of its new found status in export market, ribbon fish resources need to be continually monitored. Mortality, one of the important parameter is reported for the Indian ribbon fish Trichiurus lepturus Linnaeus in the present communication. The average annual instantaneous rate of total (Z), natural (M) and fishing mortality coefficient (F) were estimated as 2.66, 0.77 and 1.89 respectively for the 1995 to 1997 period. The exploitation rate (U) and exploitation ratio (E) were estimated as 0.66 and 0.71 respectively, which is beyond the optimum thrust reduction in the fishing effort for this stock along the Maharashtra coast is necessary

Analysis of Feed force, Tangential Force and Surface Roughness in Turning EN-353 Steel using uncoated ceramic cutting tool using Taguchi Method

The aim of the present paper is to investigate the effects of process parameters (cutting speed, feed rate and depth of cut) on performance characteristics (feed force, tangential force and surface roughness) in turning of EN-353 steel using uncoated ceramic cutting tool inserts. Experiments are designed and conducted based on Taguchi L9 orthogonal array carried out under dry cutting conditions for feed force, tangential force and surface roughness. The responses such as feed force, tangential force and surface roughness were recorded for each experiment. The depth of cut was identified as the most influential process parameters in the responses of both feed force and tangential force. The feed rate was identified as the most influential process parameter on the surface roughness