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May 12, 2013

Satellite Aided Search and Rescue (SAS&R): SATCOM APPLICATIONS

India is a member of the international COSPAS-SARSAT programme for providing distress alert and position location service through LEOSAR (Low Earth Orbit Search And Rescue) satellite system. Under this programme, India has established two Local User Terminals (LUTs), one at Lucknow and the other at Bangalore. The Indian Mission Control Centre (INMCC), is located at ISTRAC, Bangalore.
INSAT-3A located at 93.5 deg East is equipped with 406 MHz Search and Rescue payload that picks up and relays alert signals originating from the distress beacons of maritime, aviation and land users. INSAT and GOES systems have become an integral part of the COSPAS-SARSAT system and they complement the LEOSAR system

Indian LUTs provide coverage to a large part of Indian Ocean region rendering distress alert services to Bangladesh, Bhutan, Maldives, Nepal, Seychelles, Sri Lanka and Tanzania. The operations of INMCC/LUT are funded by the participating agencies, namely, Coast Guard, Airports Authority of India (AAI) and Director General of Shipping and Services. INSAT GEOSAR Local User Terminal (GEO LUT) is established at ISTRAC, Bangalore and integrated with INMCC. The distress alert messages concerning the Indian service area, detected at INMCC are passed on to Indian Coast Guard and Rescue Coordination Centres at Mumbai, Kolkata, Delhi and Chennai. During the year 2011, Indian Mission Control Centre provided search and rescue support to 4 distress incidents in Indian service area through Indian system and contributed in saving 15 lives (within INSAT coverage).

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Integrated Pest management in India - Its Aims, Principals and Tools of IPM

What is IPM (Integrated Pest Management) ?
"IPM is a sustainable approach to managing pests by combining biological, cultural, mechanical and chemical tools in a way that minimizes economic, health and environmental risks".

Aims of IPM
Reduce the use of synthetic organic pesticides
That are environmentally sound
Pest minimal risk of human health
Re-useable return on investment
Provide consumable safe food

Principles of IPM
Identification of key pests and beneficial organisms
Defining the management unit, the Agro-ecosystem
Development of management strategy
Establishment of Economic thresholds (loss & risks)
Development of assessment techniques
Evolving description of predictive pest models

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May 11, 2013

Fourth Generation Computers and Present Generation Computers

Fourth Generation Computers (1975-Present)
The fourth generation computers started with the invention of Microprocessor. The Microprocessor contains thousands of ICs. Ted Hoff produced the first microprocessor in 1971 for Intel. It was known as Intel 4004. The technology of integrated circuits improved rapidly. The LSI (Large Scale Integration) circuit and VLSI (Very Large Scale Integration) circuit was designed. It greatly reduced the size of computer.

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