Constraints on the Neutrino Parameters from the `Rise-up' in the Boron Neutrino Spectrum at Low Energies

The rise-up in boron neutrino spectrum at low energies has been studied within the framework of `pure LMA' scenario. Indirect bounds on the spectral `upturn' have been obtained from the available solar neutrino data. These bounds have been used to demonstrate the efficacy of the precision measurements of the `upturn' for further constraining the neutrino parameter space allowed by SNO salt phase data. The sterile neutrino flux has been constrained in the light of the recent 766.3 Ty KamLAND spectral data.Comment: Latex 10pages including 3 postscript figure

Some Characteristic Service Failures of Rails.

India has about 34,022 miles of rail track and Lilian Railways carry on an average about 1260 million passengers a year. The railway traffic is increasing rapidly every scar and the Government have a programme of railroad expansion. Most of the rails required by the Indian Railways are manufactured in India by the Tata Iron and Steel Company Limited, Jamshedpur, and the Steel Corpor-ation of Bengal, Burnpur. In the year 1951-52, these concerns supplied 27,198 and 8,552 tons of rails, respect-ively. The rails manufactured in India are of two variet-ies usually termed Carbon Steel Rails and Medium Manganese Rails.* All the indigenous rails are inspected and passed by the Government Metallurigcal Inspectorate at Tatanagar, in accordance with I.R.S. Specification T. 12-50 which is equivalent to B.S.S. No 11-36. A very close scrutiny is nviintained during them inspection keeping in mind the safety of' the travelling public. Even then both indi- genous and foreign rails have occasionally failed in service and railway authorities invariably send the failed materials to the Government Metallurgical Inspectorate, Tatanagar, for metallurgical examination

Some Observations on Failures in Aircraft Engines & Fuselage Parts

Due to rapid development of world air transport, India has become the connecting link between the West and the Far East. There is a net-work of aerodromes in this country and during 1951 eight Indian Companies were operating scheduled services, internal and international, covering an unduplicated route mileage of 26,205. Though there are a few workshops to repair engines of civil aircrafts there was no firm to build aircraft in this country fr a long time. Pioneering work was carried out by the Hindusthan Aircraft Ltd., Bangalore, which is well equipped for quantitative production of aircrafts

Roll - Claddim - A IC11-10D of Improving Properties of Materials

Clad materials are laminar compsites of similar or dissimilar metals or alloys bonded together surface to surface. Methods employed are direct sandwich hot or cold rolling, hot pressing, hot dipping, explosion bonding and casting etc(1). Lack of combination of several different properties in a single material necessitates the use of cladding[2]

An indigenous technology for a silver brazing alloy

This paper deals with the development of an indigenous technology for a widely used silver brazing alloy (BAg-1). Melting, alloying, casting and processing along with the heat treatment schedules, have been dealt with. Particular emphasis has been laid on the corrosion behaviour of this alloy

Processing of Non-ferrous Alloys through Extrustion

Extrusion processing is emerging as one of the impor-tant mechanical processing techniques since the last couple of decades both in terms of tonnage production and the variety of profiles. Particularly this is so in the field of aluminium alloys which are used as structurals, architectural and other engineering materials including electrical conductors. This is clear from the fact that the production of aluminium extrusions shot up from 22,000 tpy in 1980 to 62,000 tpy in 1990 and increasing at the rate of 10-15% every year. Similarly magnesium-aluminium extrusions in simple and integrated sections are being extensively used in defence and space applications because of their light weight and high strength

Economic liberalisation targeted programmes and household food security

"Although there is little consensus on the impact of trade liberalization on poverty and food security, it is nevertheless widely acknowledged that there is a need for governments to establish safety-nets to guard against any potentially harmful effects on the poor and vulnerable sections of society. Against this background, programs aimed at achieving food security and reducing poverty gain increased importance in the reform era. This study aims to evaluate several such programs that are currently in place in the country from the point of view of their impact, efficiency and financial sustainability. The purpose is to determine how these programs may be improved and propose appropriate policy options for reform, while also keeping in mind the new challenges that might lie ahead. Specifically, the study evaluates the Public Distribution System (PDS), Public Works Programs, and certain food-based direct intervention programs such as the Integrated Child Development Scheme (ICDS) and Tamil Nadu Integrated Nutrition Program (TINP), with a view to suggest how they can be made more cost effectiveness and better targeted." From Author's Executive SummarySafety nets ,

Four Zero Texture Fermion Mass Matrices in SO(10) GUT

We attempt the integration of the phenomenologically successful four zero texture of fermion mass matrices with the renormalizable SO(10) GUT. The resulting scenario is found to be highly predictive. Firstly, we examine the phenomenological implications of a class of the lepton mass matrices with parallel texture structures and obtain interesting constraints on the parameters of the charged lepton and the neutrino mass matrices. We combine these phenomenological constraints with the constraints obtained from SO(10) GUT to reduce the number of the free parameters and to further constrain the allowed ranges of the free parameters. The solar/atmospheric mixing angles obtained in this analysis are in fairly good agreement with the data.Comment: 14 pages, 3 figures, 1 tabl