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Children Science Congress begins with interactive dialogue of Prof. Yashpal

It was a real feast of knowledge for students as well as the audience at the inaugural ceremony of the Children Science Congress when Prof. Yashpal invited school students to the dais and explained the mystery of the sound of clapping

Science Congress is an Important Platform for Bringing

The Indian Science Congress is an annual session generally held from 3rd to 7th January among the scientists of different disciplines, science managers, policy makers and the general public to give a stronger impulse and a more systematic direction to the scientific inquiry, to promote the interaction of societies and individuals interested in science in different parts of the country and to obtain a more general attention to the objects of pure and applied sciences.

CHILDREN SCIENCE CONGRESS AT GUJARAT SCIENCE CITY

About 250 students from all over the country will participate in children science congress at the science city starting from January 3. The congress, a part of the Indian science congress, will be a unique event for children of Gujarat, to interact with the selected students from different parts of the country. The Children Science Congress is a part of the 92nd Indian Science Congress which is being held this year in Ahmedabad.

Tsunami: A new name in earthquake disaster !

For thousands of fisher folk, who had gone like every morning into the sea, it was again the same story - suddenly being caught in a phenomenon, tsunami, which struck India for the first time in recorded history.

New Tender Announced

TENDER DOCUMENT FOR
LIGHTING AND SOUND SYSTEMS FOR CULTURAL PERFORMANCES AT GLOBAL INVESTORS'
SUMMIT 2005
AT GUJARAT SCIENCE CITY, AHMEDABAD.

Winning the war against genetic diseases

ONE OF the potential benefits of Human Genome Project is in the field of gene therapy. Each of us carries about half a dozen defective genes. We remain blissfully unaware of this fact unless we, or one of our close relatives, are amongst the many millions who suffer from a genetic disease. About one in ten people has or will develop at some later stage, an inherited genetic disorder, and approximately 2,800 specific conditions are known to be caused by defects (mutations) in just one of the patient's genes. Some single gene disorders are quite common-cystic fibrosis is found in one out of every 2500 babies born in the Western World and in total, diseases that can be traced to single gene defects account for about 5 percent of all admissions to children's hospitals.
Most of us do not suffer any harmful effects from our defective genes be cause we carry two copies of nearly all genes, one derived from our mother and the other from our father. The only exceptions to this rule are the genes found on the male sex chromosomes. Males have one X and one Y chromosomes, the former from the mother and the latter from the father, so each cell has only one copy of the genes on these chromosomes. In the majority of cases, one normal gene is sufficient to avoid all the symptoms of diseases. If the potentially harmful gene is recessive, then its normal counterpart will carry out all the tasks assigned to both. Only if we inherit from our parents two copies of the same recessive gene will a disease develop.

Toxic wastes as fertilisers Poisoning or nourishing ?

Wastelands: The threat of toxic fertilisers," released recently by the national and state Public Interest Research Groups (PIRG) of the United States, reveals that a total of 22 toxic metals, including arsenic and lead , were found in the common fertilisers in the US. Fertiliser products become contaminated when manufacturers buy toxic wastes from industrial facilities to obtain low cost plant nutrients such as zinc or iron.


Human Genome Project A special Report

The complete set of instructions for making an organism is called its genome. It contains the master blueprint for all cellular structures and activities for the lifetime of the cell or organism. Found in every nucleus of a person's many trillions of cells, the human genome consists of tightly coiled threads of deoxyribonucleic acid (DNA) and associated protein molecules, organized into structures called chromosomes.
Some DNA details : If unwound and tied together, the strands of DNA would stretch more than 5 feet but would be only 50 trillionths of an inch wide. For each organism, the components of these slender threads encode all the information necessary for building and maintaining life, from simple bacteria to remarkably complex human beings. Understanding how DNA performs this function requires some knowledge of its structure and organization.


Drink water, keep heart healthy

Researchers at Loma Linda University in California found that people who drank at least five glasses of water each day were less likely to die from a heart attack than those who drank two or fewer glasses per day. In contrast, people who drank a lot of other fluids were more likely to die from heart attack than those who drank less, with high levels of non water drinking in women associated with a more than twofold increased risk of death

How sound becomes electric

SCIENTISTS FROM THE Centre for Hearing and Balance at Johns Hopkins have discovered how tiny cells in the inner ear change sound into an electrical signal the brain can understand.

Their finding, published in a recent issue of Nature Neuroscience, cound improve the design and programming of hearing aids and cochlear implants by filling in a 'black hole' in scientists understanding of how we hear, say the researchers.

"Sound itself is mechanical, a wave that moves, just like the ripples fanning out from a pebble dropped in a lake," says Paul Fuchs, professor of otolaryngology at the Johns Hopkins School of Medicine. "When the inner ear detects this wave, a burst a nerve sends an electrical signal to the brain that carries information about the original sound. But the nature of the chemical burst has been a mystery until now."


Vascular surgeon with a vision

Many of the serious illnesses, be it heart attack, stroke or problems, have their origin in blood vessels. But the surgeon who deals with the blood vessels, the lifeline of the human body, is the least known.
Dr. S.A. Hussain is not angry with this public ignorance or the unfavourable treatment the surgeons of vessels, called vascular surgeons, receive. Instead, he is on a campaign to sensitise people and to improve public health.


New asthma treatment

Three potent proteins of the immune system, evolved to purge us of intestinal parasites, now often launch misguided attacks in our airways, triggering the congestion of asthma that leaves millions gasping for air.
By studying the genetic machinery that controls production of these immune soldiers called cytokines, a team of scientists has demonstrated a potential strategy to silence their misfiring and quell the asthma response.

Mechanical heart moves ahead

A daring experiment testing a self- contained mechanical heart offers new hope for thousands with failing heart, many of whom may die while waiting for transplants.

First genetically altered babies born

The world's first genetically modified babies have been born after women unable to conceive naturally underwent a revolutionary new fertility treatment used by scientists at a New Jersey medical facility, a researcher said this week.


Low Cost Cholera Vaccine

Trials of a cholera vaccine manufactured in Vietnam at a cost of about only 20 US cents a dose have produced encouraging results, especially for children, an international team of researchers reports in the World Health Organisation's latest issue of The Bulletin. A team headed by Professor Dang Duc Trach at the National Institute of Hygiene and Epidemiology in Hanoi concluded that the vaccine was "safe and immunogenic" and "could elicit robust immune responses".


 
 
 
Communication and Information Technology
 
INSAT- 3B Big Leap for Net Services

elemedicine, business and mobile satellite services are expected to get a major boost when the new INSAT-3B satellite is placed in orbit in mid-March .

Since its inception in June 1972, when the Government set up the Space Commission and Department of Space (DOS), the Indian space programme has been propelled by initiatives to develop satellites, satellite launch vehicles, sounding rockets and supported ground systems. The INSAT or the Indian satellite system programme, which began in the 1980s with the launch of four bought-up satellites from the US, has now turned indigenous. The INSAT-2 series-barring INSAT 2D-has been built indigenously.
Now the Indian space and communications industry is intently waiting for the scheduled mid-March launch of INSAT-3B. K. Kasturirangan, Chairman of Indian Space Research Organisation (ISRO), says "Telemedicine, business and mobile satellite services will move some notches further when the latest indigenous telecom satellite goes into orbit. For the first time, an INSAT will offer Ku band frequencies for the 7,500-strong VSAT networks and Internet service providers (ISPS) that drive financial and corporate sectors. "The Rs.-150 crore INSAT-3B is a purely telecom satellite and put on the fast track ahead of 3A in December 1997 after the failure of 2D. Its three transponders will almost double the available capacity for the VSAT networks.

   That's not all. Even GSLV (geosynchronous satellite launch vehicle), the country's most ambitious space project, is in the final stages of development and is likely to be test-flown in June or July. It is slated to open up commercial opportunities for ISRO in the small international launch market, currently dominated by the US and European Space Agency. These achievements are bound to catapult India as an emerging power in the business of selling space.

Skyrocketing Hopes
ven otherwise, INSAT is now among the largest domestic satellite systems in Asia. Currently, there are five operational satellites in orbit with 63 transponders working. The sudden loss of INSAT 2D had curtailed VSAT operations of several private operators. It had also put brakes on the expansion plans of both the Department of Telecommunications (DOT) and Doordarshan. Being the main INSAT users, both the bodies predict a demand of nearly 120 transponders by 2002. The need for move satellites becomes more imperative with both INSAT-1D and 2A nearing their end. Already, last year's INSAT-2E is billed as India's most sophisticated indigenously-built communications satellite so far. It comes with the latest in transponder technology to beam back TV, phone and radio signals, apart from a powerful radiometer used for weather forecasting. Already, 11 of its 17 transponders have been leased out to Intelsat for the next 10 years at a fee of Rs. 42 crore per year. It is designed to last 12 years compared to seven in the case of other INSAT series satellites.
   Worldwide, four major factors have fuelled the demand for satellites, the growth of the Internet, corporate business communication, value-added services and electronic commerce; mushrooming of satellite TV channels and the launch of direct-to-home (DTH) service with high-definition picture and CD-quality sound; and development of commercial remote-sensing applications and the urgent need for basic telephony in the developing countries. In this perspective, says Kasturirangan, the INSAT-3 series has many 'firsts' such as an all-India coverage on a Ku band, till now restricted to the metro cities. The 3 series can support the DTH broadcast as well as Internet access. Weighing 2.07 tonnes, the INSAT 3B will exclusively allocate transponders for the Vidya Vahini Channel for interactive training and development communication announced two years ago.

Floating Objects in the Sky
he strongest demand push, however, is coming from global mobile communications. Mobile satellite services (MSS) are set to revolutionise the landscape of mobile communications in the Indian subcontinent.

The MSS, which was first experimented on INSAT-2C will now become operational. It will provide advanced voice, data and audio services. On an experimental basis, 3B will also use its extended C capacity to introduce telemedicine to eventually give connectivity to rural areas. This will provide timely and remote diagnosis and take healthcare to villages.


INSAT-3B is the first of the five third-generation INSAT series satellites. The total cost of the mission is under Rs 500 crore-including Rs.276 crore for the launch and Rs. 66 crore for insurance. VSATS that came in about five years ago to serve the stock markets, banking, financial and 300 corporate and public sector units, have till now been allotted seven transponders on 2B and 3C. The use of the powerful Ku frequencies will cut the size of the ground systems they would have needed for the bands. The Ku band with a bandwidth of 77/72 Mhz provides three channels. The MSS transponders are in the C/S band. The power on the Ku band will be almost three times higher at 55 W (20W on earlier satellites).

More 'Birds' in Offing
ccording to Kasturirangan the next INSAT will be launched around the year-end. Both 3A and 3C are in a "neck and neck" race and the first one to be completed will follow 3B. INSAT-3C will again be a fully telecom satellite with three Ku, 24 C and six extended C band transponders, 3A, like 2E, has a meteorology component and has been facing procurement and assembly problems. The demand for transponders is at least 30-40 more than the supply, ISRO is likely to meet the requirement by launching one or two more satellites. The projection is for about 130 transponders in the next two years. Overall, the launch of INSAT-3B satellite next month would offer the additional bandwidth that most telecom service providers have been eagerly waiting for.

Sudhir Chowdhary
Computers Today
February 2000

 
 

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