Friday, May 30, 2008

Nobel Laureates 2007

Physics: Albert Fert and Peter Grünberg

"for the discovery of Giant Magnetoresistance"

Chemistry: Gerhard Ertl

"for his studies of chemical processes on solid surfaces"

Physiology or Medicine: Mario R. Capecchi, Sir Martin J. Evans and Oliver Smithies

"for their discoveries of principles for introducing specific gene modifications in mice by the use of embryonic stem cells"

Literature:Doris Lessing

"that epicist of the female experience, who with scepticism, fire and visionary power has subjected a divided civilisation to scrutiny"

Peace: Intergovernmental Panel on Climate Change (IPCC) and Albert Arnold (Al) Gore Jr.

"for their efforts to build up and disseminate greater knowledge about man-made climate change, and to lay the foundations for the measures that are needed to counteract such change"

Economics: Leonid Hurwicz, Eric S. Maskin and Roger B. Myerson

"for having laid the foundations of mechanism design

Nomophobia

It's the fear of being out of mobile phone contact. According to a study, nomophobia is plaguing our 24/7 life — running out of battery, credit or losing one's handset. About 53% of users surveyed are affected by not having network coverage. The survey revealed that men suffer more than women, with 48% of females and 58% of males admitting to feelings of anxiety. Many respondents said they never switched off their mobile phones.




Genome of Dr. Watson

Dr. Watson was also the architect and first director of the government’s $3 billion human genome project, which completed the first human genome in 2003.

A copy of his genome, recorded on a pair of DVDs was presented to Dr. Watson Houston by Richard Gibbs, director of the Human Genome Sequencing Center at the Baylor College of Medicine, and by Jonathan Rothberg, founder of the company 454 Life Sciences.

Dr. Rothberg’s company makes an innovative DNA sequencing machine, the latest version of which proved capable of decoding Dr. Watson’s genome in two months at a cost of less than $1 million. The sequence was verified and analyzed by Dr. Gibbs’s center in Houston. It was Dr. Gibbs who proposed the idea of sequencing Dr. Watson’s genome.

Dr. Watson has said he will make his entire genome available for researchers to study, with the single exception of his apolipoprotein E gene, the status of which he does not wish to know because it predisposes a person toward Alzheimer’s disease.

The first two genome sequences belonging to individuals are now being made available to researchers within a few days of each other. One is Dr. Watson’s and the other belongs to J. Craig Venter, who as president of the Celera Corporation started a human genome project in competition with the government.


Nomophobia

It's the fear of being out of mobile phone contact. According to a study, nomophobia is plaguing our 24/7 life — running out of battery, credit or losing one's handset. About 53% of users surveyed are affected by not having network coverage. The survey revealed that men suffer more than women, with 48% of females and 58% of males admitting to feelings of anxiety. Many respondents said they never switched off their mobile phones.

Therapeutic Vaccine for Diabetes

U.S. medical researchers say they've developed a vaccine that might be able to prevent and even reverse development of type 1 diabetes.

The scientists at the University of Pittsburgh Medical Center and the Baxter Healthcare Corp. said microspheres carrying targeted nucleic acid molecules fabricated in laboratories have been shown to prevent and even reverse new-onset cases of type 1 diabetes in animal models.

In research conducted at the Children's Hospital of Pittsburgh, the scientists injected the microspheres under the skin near the pancreas of mice with autoimmune diabetes. The microspheres were then captured by white blood cells known as dendritic cells that released the nucleic acid molecules within the dendritic cells.

The released molecules reprogrammed the cells, and then migrated to the pancreas. There, they turned off the immune system attack on insulin-producing beta cells. Within weeks, the scientists said, diabetic mice were producing insulin again with reduced blood glucose levels.

First woman Genome

In 2001, the DNA sequence was published of a combination of persons. The DNA sequences of Jim Watson, discoverer of the DNA’s double helix structure, followed in 2007, and later the DNA of gene hunter Craig Venter. Recently the completion of the sequences of two Yoruba-Africans was announced.

Geneticists of Leiden University Medical Centre (LUMC) are the first to determine the DNA sequence of a woman. This research was announced by the researchers May 26, 2008 at ‘Bessensap’, a yearly meeting of scientists and the press in the Netherlands.

She is also the first European whose DNA sequence has been determined. The results will contribute to insights into human genetic diversity.

DNA of geneticist Marjolein Kriek

The DNA is that of Dr. Marjolein Kriek, a clinical geneticist at LUMC. Professor Gert-Jan B van Ommen, leader of the LUMC team and director of the ‘Center for Medical Systems Biology’ (CMSB), a center of the Netherlands Genomics Initiative women do not have a Y-chromosome, they have two X-chromosomes. As the X-chromosome is present as a single copy in half the population, the males, it has undergone a harsher selection in human evolution. This has made it less variable. We considered that sequencing only males, for ‘completeness’, slows insight into X-chromosome varialibity. So it was time, after sequencing four males, to balance the genders a bit”.

Eight times coverage

The DNA sequencing was done with the Illumina 1G equipment. In total, approx. 22 billion base pairs (the ‘letters’ of the DNA language) were read. That is almost eight times the size of the human genome.

The sequencing itself took about six months. Partly since it was run as a ‘side operation’ filling the empty positions on the machine while running other projects. Would such a job be done in one go, it would take just ten weeks.

The cost of the project was approximately €40.000.- This does not include further in-depth bioinformatics analysis. This is estimated to take another six months.


Thursday, May 29, 2008

एडम ब्रिज : सेतु समुद्रम परियोजना

रामसेतु मानव निर्मित है या प्राकृतिक, इस विवाद से परे हटकर भू-विशेषज्ञों ने इसे न तोड़ने की हिदायत दी है। उन्होंने आगाह किया है कि एडम ब्रिज को तोड़ना प्राकृतिक तबाही का कारण बन सकता है।

सेतु समुद्रम परियोजना विरोधी अंदोलन के तहत एक जुट पर्यावरण वैज्ञानिकों और भू-वेत्ताओं ने कहा है कि मन्नार की खाड़ी और पाक जलसंधि टेक्टोनिक यानी आंतरिक हलचलों के लिहाज से काफी कमजोर है। भूकंप से जुड़े खतरों को लेकर भी काफी संवेदनशील है।

जियोलोजिकल सर्वे आफ इंडिया के पूर्व निदेशक के. गोपालकृष्णन ने कहा है कि यह महज एक बालू का टीला नहीं । कृष्णन ने कहा कि ऐसे साक्ष्य मौजूद हैं जो साबित करते हैं कि रामसेतु भूगर्भीय, आंतरिक संरचना और सामुद्रिक विभाजक का काम करता है। विभिन्न भूगर्भीय और सामुद्रिक हलचलों को नियंत्रित करता है। उन्होंने कहा कि राम सेतु समुद्र को तोड़े जाने से समुद्र के भीतर भूस्खलन और भूकंप जैसी घटनाएं हो सकती हैं। दुर्लभ जीव-जंतुओं के आवास समाप्त हो जाएंगे।

गोपालकृष्णन ने कहा कि किसी भी परियोजना के लिए भू-तकनीकी मूल्यांकन आवश्यक है। लेकिन सेतु समुद्रम परियोजना के लिए समुद्र के भीतर कोई भूगर्भीय सर्वेक्षण नहीं कराया गया। उन्होंने केंद्र से अनुरोध किया कि इस परियोजना की नजाकत को देखते हुए बहु-आयामी समिति का गठन करे।

पर्यावरण विज्ञानी और मनोनमणियम सुंदरनर यूनीवर्सिटी में एसोसिएट प्रोफेसर डा. अरुणाचलम का कहना है कि परियोजना के दौरान मानवीय गतिविधियां पाक जलसंधि और मन्नार खाड़ी की नाजुक पर्यावरण प्रणाली में उथल-पुथल मचा सकती हैं। सेतु को तोड़ा गया तो जैविक विविधता को भी व्यापक नुकसान होगा। साथ ही कोरोमंडल तट और हिंद महासागर में भी परिवर्तन होंगे। चक्रवात या सुनामी के कारण मानवजाति के लिए भी खामियाजा भुगतना पड़ सकता है। डा. अरुणाचलम ने कहा कि अपना देश जल संसाधनों और आजीविका के लिए पूरी तरह मानसून पर आश्रित है। राम सेतु तोड़े जाने पर भारत से लगे समुद्रों में मानसून चक्र भी प्रभावित होगा। नतीजतन बाढ़ और सूखे जैसी आपदाओं का सामना करना पड़ सकता है।

From Jagran 28 September, 2007

गणितज्ञ नलिनी जोशी को सिडनी का प्रतिष्ठित पुरस्कार

भारतीय मूल की आस्ट्रेलियाई गणितज्ञ नलिनी जोशी को सिडनी के प्रतिष्ठित पुरस्कार एकेडमी ऑफ साइंसेज (एएएस) से सम्मानित किया गया। रॉयल सोसाइटी ऑफ लंदन द्वारा इस पुरस्कार की स्थापना 1954 में की गई थी।

दरअसल यह पुरस्कार जोशी को गणित पर किए गए उनके सर्वश्रेष्ठ कार्यो के लिए दिया गया है। जोशी वर्तमान में सिडनी विश्वविद्यालय के गणित और सांख्यिकी विभाग की प्रमुख हैं। जोशी ने बताया, मेरा जन्म म्यांमार में हुआ था, लेकिन मेरे पूर्वजों का ताल्लुक भारत के गुजरात और पंजाब राज्य से था। मेरे पिता 1971 में आस्ट्रेलिया आ गए। बचपन में अंतरिक्ष यात्री बनना चाहती थी लेकिन गणितज्ञ बन गई।

Sagarika

Defence Research and Development Organisation (DRDO), the country's premier military research organisation has successfully acquired the technology to launch missiles from the ocean depths, becoming the world's fifth country to do so.

A.K Chakrabarti, under whose leadership a team of 86 scientists achieved the success under this project is called K-15. State-of-the-art missile system has the capability of being launched from sub-surface (underwater) environment.

The missile named Sagarika has been test fired successfully on Feb 26, 2008 this year and last year too from a submerged pontoon. The missile has a range of 700 km. Powered by a turbojet, it can carry a 500-kg payload. It is 8.5 metres long and about a metre in diameter.

With this, India has become capable of launching missiles from air, land, ships and submarines and joins an elite group that includes the US, Russia, France and China.


Monday, May 26, 2008

Gurjar & Reservation

The Gujjar or Gurjar are an ethnic group and caste of the Indian subcontinent ( Gurjara, Gujar and Goojar).

In Rajasthan, some members of the Gurjar community resorted to violent protests over the issue of reservation in 2006 and 2007. In September 2006, the Gurjars organized violent protests, after the ruling Government failed to keep its promise of including the community in the Scheduled Tribes (ST) category. In May 2007, during violent protests over the reservation issue, the members of the Gurjar community clashed with the police twenty six people (including two policemen). Subsequently, the Gurjars protested violently, under various groups including the Gurjar Sangarsh Samiti, Gurjar Mahasabha and the Gurjar Action Committee. Presently, the Gurjars in Rajasthan are classified as Other Backward Classes (OBCs).

On June 05, 2007 the Gurjar rioted over their desire to be added to the governments of India list of tribes who are given preference in India government job selection as well as placement in the schools sponsored by the states of India. This preference is given under a system designed to help India's poor and disadvantaged citizens. However, other tribes on the list oppose this request as it would make it harder to obtain the few positions already set aside.

In December 2007, the Akhil Bhartiya Gujjar Mahasabha ("All-India Gurjar Council") stated that the community would boycott BJP, which is in power in Rajasthan.[51]

In early 2000s, the Gujjar community in Rajasthan was also in news for the falling sex ratio, unavailability of brides and the resulting polyandry.

The origins of the Gurjars are uncertain. The Gurjara clan appeared in northern India about the time of the Huna invasions of northern India. Some scholars, such as V. A. Smith, believed that the Gurjars were foreign immigrants, possibly a branch of Hephthalites ("White Huns"). D. B. Bhandarkar (1875-1950) believed that Gujars came into India with the Hunas, and the name of the tribe was sanskritized to "Gurjara". He also believed that several places in Central Asia, such as "Gurjistan", are named after the Gujars and that the reminiscences of Gujar migration is preserved in these names. General Cunningham identified the Gurjars with Yuezhi or Tocharians.

In the past, Gujjars have also been hypothesized to be descended from the nomadic Khazar tribes, although the history of Khazars shows an entirely different politico-culture ethos. This argument is chiefly based on the assumption that the word "Gurjar" is derived from the word "Khazar"; the Indo-Aryan languages lacked the sounds "kh" and "z", converting them respectively into "g" and "j". In Gazetteer of Bombay Presidency, the British civil servant James M. Campbell identified Gujars with Khazars.

Some Gujjars also claim that the Gurjar caste is related to the Chechens and the Georgians, and argue that Georgia was traditionally called "Gujaristan" (actually Gorjestan). Some of them also claim that Germans are Gujjars. However, there is no evidence for such claims. The word "Georgia" derived from the Arabic and Persian word Gurj, and not Gujjar or Gurjar.

Meenas, the powerful ST community has strongly opposed inclusion of the Gurjar's into the STs fearing lesser number of seats that would be available to them as a consequence. Since everything in the end will be decided by whats the politically smart thing to do I see little chance of the Gurjars' demands being met. Thats because they comprise a mere 2% of the votes in Rajasthan as opposed to 12% for the Meena community.

None of the media have mentioned the fact that Meenas of Sawai Madhopur are generally a wealthy lot owning several acres of land etc.They are listed under Scheduled tribes, since during the erstwhile maharaja's rule they were listed as criminal tribes.

Several Meenas are in very high positions not only in Rajasthan.

Make it necessary to prove economic disability to claim any reservation.

That is the only solution.

Caste wars Jats Vs Rajputs etc are no longer relevant.

Friday, May 23, 2008

Phoenix Mission

Phoenix is a robotic spacecraft on a space exploration mission to Mars under the Mars Scout Program.

Phoenix launched successfully on August 4, 2007 on a Delta 7925 launch vehicle from Pad 17-A of the Cape Canaveral Air Force Station. It is scheduled to land on Mars on May 25, 2008.

It is a multi-agency program which is being is headed by the Lunar and Planetary Laboratory at the University of Arizona, under the direction of NASA.

The Phoenix Mission is a partnership of universities in the United States, Canada, Switzerland, Denmark, Germany and the United Kingdom, NASA, the Canadian Space Agency, and the aerospace industry. Phoenix is planned to land in the planet's water-ice-rich northern polar region and, if this is successful, will use its robotic arm to dig into the Arctic terrain.

Phoenix launched on 4 August 2007, at 5:26:34 am EDT (09:26:34 UTC) If successful, Phoenix will be the sixth lander to successfully touch down on Mars and the first since Viking 1 & 2 in 1976 to land using powered descent.

The Delta 7925 has a successful launch history, which includes launches of the Spirit and Opportunity Mars Exploration Rovers in 2003 and Mars Pathfinder in 1996.

The spacecraft has several subsystems which include

(1) command and data handling, controlling the spacecraft's computer processing,

(2) electrical power, consisting of solar panels, batteries, and associated converting circuits,

(3) telecommunications, ensuring flow of data to and from Earth,

(4) guidance, navigation, and control, assuring the spacecraft arrives safely at Mars,

(5) propulsion, controlling trajectory correction maneuvers during cruise and thrusters during landing,

(6) structure, providing the spacecraft framework and integrity,

(7) mechanisms, enabling the movement of several spacecraft components, and

(8) thermal-control, using heat transfer to ensure proper temperature ranges on all parts of the spacecraft.

Sunday, May 18, 2008

Food Crisis and Farmers' Loan Waiving

2008: The Year of Global Food Crisis

Whether
food scarcity, global warming, rocketing oil prices and the world population explosion are headinig towards the biggest crisis of the 21st century 'FOOD CRISIS" by pushing up food prices and spreading hunger and poverty from rural areas into cities ?

Experts say that for the first time in history the impact is spreading from the developing to the developed world.

More than 73 million people in 78 countries that depend on food handouts from the United Nations World Food Programme (WFP) are facing reduced rations this year. The increasing scarcity of food is the biggest crisis looming for the world.

The UN Food and Agriculture Organisation has warned that rising prices have triggered a food crisis in 36.

World Bank demands urgent action and the bank points out that global food prices have risen by 75% since 2000, while wheat prices have increased by 200%. The cost of other staples such as rice and soya bean have also hit record highs, while corn is at its most expensive in 12 years.

The increasing cost of grains is also pushing up the price of meat, poultry, eggs and dairy products. And there is every likelihood prices will continue their relentless rise, according to expert predictions by the UN and developed countries.If prices keep rising, more and more people around the globe will be unable to afford the food they need to stay alive, and without help they will become desperate. More food riots will flare up, governments will totter and millions could die.

Food scarcity means a big increase in the number of people going hungry (WFP). The WFP estimates it needs an additional $500 million to keep feeding the 73 million people in Africa, Asia and central America therefore by the middle of 2008 the reduced rations could be averted.

Age-old patterns of famine are also changing.

Of the 36 countries named last month as currently facing a food crisis, 21 are in Africa. Lesotho and Swaziland have been afflicted by droughts, Sierra Leone lacks widespread access to food markets because of low incomes and high prices, and Ghana, Kenya and Chad among others are enduring "severe localised food insecurity".

In India last year, more than 25,000 farmers took their own lives, driven to despair by grain shortages and farming debts. The spectre of food grain imports stares India in the face as agricultural growth plunges to an all-time low (India Today magazine).

Global demand for food will double by 2030 (The World Bank prediction) partly because the world's population to grow by three billion by 2050.

The rise in global temperatures caused by pollution is also beginning to disrupt food production in many countries. According to the UN, an area of fertile soil the size of Ukraine is lost every year because of drought, deforestation and climate instability.

Last year Australia experienced its worst drought for over a century, and saw its wheat crop shrink by 60%.

China's grain harvest has also fallen by 10% over the past seven years.

The UN Intergovernmental Panel on Climate Change has predicted that, over the next 100 years, a one-metre rise in sea levels would flood almost a third of the world's crop-growing land.

Accelerating demand for allegedly green biofuels and the world's growing appetite for meat have also been blamed for this crisis.

Meat is a very inefficient way of utilising land to produce food becasue it is delivering far fewer calories, acre for acre, than grain. On the hand the amount of meat eaten by the average demand by all developing countries has doubled since 1980.

The world's grain stocks are at their lowest for 30 years.

Another key driver is the soaring cost of oil, which last week topped $105 a barrel for the first time. As well as increasing transport costs, oil makes crop fertilisers more expensive.

According to the World Bank, fertiliser prices have risen 150% in the past five years. This has had a major impact on food prices, as the cost of fertiliser contributes over a quarter of the overall cost of grain production in the US, which is responsible for 40% of world grain exports.

This is a wake-up call. The choices we make now will determine whether we can feed ourselves in the future. If we get it right we can have a thriving food economy.

Farmers loan waiver a revolutionary step

The waiver of 40 million poor farmers loans is as a historic and revolutionary step.

The government announced a waiver of Rs 50,000 crore worth of loans to small and marginal farmers and a settlement scheme for other farmers that would cost the exchequer another Rs 10,000 crore.

Finance Minister P. Chidambaram had earlier announced a complete waiver of unpaid loans issued to farmers with holdings up to two hectares in his 2008/09 budget proposals in an effort to boost the agricultural sector.

Accoridng to Somnath Ballav, PwC’s executive director (tax and regulatory services):-

The money to fund the Rs 60,000-crore outlay is likely to come from the industry through different revenue mechanisms. The government has clearly set its sight on the ensuing elections as they have set a June 30, 2008 deadline for the loans to be waived.

Politicians fighting to corner credit for the Rs 60,000-crore farm loan waiver which may not have envisaged relief, with as many as 316 farmers in Vidarbha, 40 in Marathwada and 31 in western Maharashtra ending their lives since January this year. Activists working in these agrarian areas say that neither the intense build-up to the loan waiver nor its actual announcement has helped alleviate the misery of the farmers or take suicide off their minds.


Saturday, May 17, 2008

Lichens, bio-indicators

Lichens are mutualistic associations of a fungus and an alga or cyanobacterium and occur as crusty patches or bushy growths on trees, rocks and bare ground.

The names given to lichens strictly refer to the fungal partner; the algae have separate names.

Lichens are very sensitive to sulphur dioxide pollution in the air. Since industrialisation, many lichen species have become extinct in large areas of lowland
Britain, one example being the beard moss Usnea articulata. This is mainly due to sulphur dioxide pollution, but the loss of habitat, particularly ancient woodland, has also led to reductions in some species.

Lichens are sensitive to sulphur dioxide because their efficient absorption systems result in rapid accumulation of sulphur when exposed to high levels of sulphur dioxide pollution. The algal partner seems to be most affected by the sulphur dioxide; chlorophyll is destroyed and photosynthesis is inhibited.

Lichens also absorb sulphur dioxide dissolved in water.

Lichens are widely used as environmental indicators or bio-indicators. If air is very badly polluted with sulphur dioxide there may be no lichens present, just green algae may be found. If the air is clean, shrubby, hairy and leafy lichens become abundant. A few lichen species can tolerate quite high levels of pollution and are commonly found on pavements, walls and tree bark in urban areas.

The most sensitive lichens are shrubby and leafy while the most tolerant lichens are all crusty in appearance. Since industrialisation many of the shrubby and leafy lichens such as Ramalina, Usnea and Lobaria species have had very limited ranges, often being confined to the parts of Britain with the purest air such as northern and western Scotland and Devon and Cornwall.

Kepler's Three Laws of Planetary Motion

In the 16th century, the Polish astronomer Nicolaus Copernicus replaced the traditional Earth-centered view of planetary motion with one in which the Sun is at the center and the planets move around it in circles. Although the Copernican model came quite close to correctly predicting planetary motion, discrepancies existed. This became particularly evident in the case of the planet Mars, whose orbit was very accurately measured by the Danish astronomer Tycho Brahe.

The problem was solved by the German mathematician Johannes Kepler, who found that planetary orbits are not circles, but ellipses. Kepler described planetary motion according to three laws. Each of these laws is illustrated by an applet.

Law I: Each planet revolves around the Sun in an elliptical path, with the Sun occupying one of the foci of the ellipse.

Law II: The straight line joining the Sun and a planet sweeps out equal areas in equal intervals of time.

Law III: The squares of the planets' orbital periods are proportional to the cubes of the semimajor axes of their orbits.

Kepler's laws apply not just to planets orbiting the Sun, but to all cases in which one celestial body orbits another under the influence of gravitation -- moons orbiting planets, artificial satellites orbiting the Earth and other solar system bodies, and stars orbiting each other.

Nitrate Exposure & Blue Baby Syndrome

Nitrate (N03) is a common groundwater contaminant which also occurs naturally in our environment and is important in natural processes such as decomposition and plant growth. Natural levels of nitrate in roundwater are rarely high enough to be dangerous to humans who drink the water. However, when it becomes highly concentrated in groundwater, nitrate can be toxic.

  • Significant sources of nitrate contamination include fertilizers, animal wastes, and human sewage.
  • Nitrate may contaminate a private drinking water well if the well is shallow, poorly maintained, old, and/or near a source of contamination.
  • These situations also favor contamination by disease-causing bacteria. Disease-causing bacteria such as fecal coliform, or E. coli, may worsen the health effects of nitrate if ingested.
  • Infants under six months of age are at the most danger from elevated levels of nitrates in drinking water. A baby fed water high in nitrates (or fed formula made with high-nitrate water) may develop a condition called “methemeglobinemi” or blue baby syndrome.” In this condition, the baby’s blood is unable to properly carry oxygen. As a result, the baby’s skin turns a blue color, particularly around the eyes, nose, and mouth. Death may follow, if oxygen deprivation is severe and lengthy enough. Susceptibility to blue baby syndrome increases if fecal coliform bacteria are also present in the baby’s drinking water. Fecal coliform bacteria cause diarrhea and interfere with digestion, intensifying nitrate’s effects on the body.
  • Any water nitrate-nitrogen level over 10 mg/L is considered too high for safe drinking by babies under six months of age. This 10 mg/L nitrate-nitrogen limit is the Maximum Contaminant Level set up by the U.S. Environmental Protection Agency. Almost all adults may drink water with nitrate-nitrogen levels higher than 10 mg/L. However, some hereditary disorders render a few adults susceptible to methemeglobinemia. Also, women who are pregnant should not drink water high in nitrates.

Friday, May 16, 2008

The Agni III

India on 7th May, 2008 test-fired the 3,500-km range “surface-to-surface nuclear capable” Agni-III missile from the Wheelers' Island in Balasore off Orissa coast.

This was the third test of this long-range ballistic missile. The first test in 2006 had failed when shortly after lift off, the missile plopped into the Bay of Bengal, but the second test carried out on April 12, 2007 was successful.

  • The Agni III has a velocity of 5,000 metres per second, and is a totally new system from the 700-km-range Agni-I (12-tonne) and 2,500-km-range Agni-II (17-tonne) missiles inducted by the armed forces.
  • Unlike its predecessors, it is a fully solid propellant fuelled surface-to-surface missile, has a range of over 3,000 kms and is nuclear-capable. So it can easily act as a deterrent to Chinese missiles.
The test fire was a move to bridge the stark strategic imbalance in terms of nuclear and missile arsenals.
  • The Agni-III is being seen as one of India's answers to China's growing military capability.
  • Since China already has a wide array of missiles, ranging from the fully-operational 8,500-km CSS-4 to the new 11,270-km DF-31A inter-continental ballistic missiles (ICBMs), India needs an operational Agni-III missile as soon as possible.
  • China is also the only country in Asia to have Submarine-launched ballistic missiles (SLBMs) like JL-1 and the almost-ready JL-2, with a strike range in the region of 8,000 km.
  • The Chinese have been reported to having built secret bases a stone's throw away from the Andaman and Nicobar islands, near the straits of Mallacca. China's arsenal of nuclear tipped missiles can hit any city in India.
India has tested a SLBM (Submarine-launched ballistic missile)

India has tested a SLBM (Submarine-launched ballistic missile) on Tuesday (Sept 11, 2007)which can be capped with a nuclear war-head and which has a range of 1500 km (According to Television news channel 'Times Now'). Submarine launches are tricky, and technologically challenging but India has managed to do it.

The tests which were conducted jointly by the DRDO & the Navy are said to be a much bigger technological achievement than even the successful test of Agni 3 missiles. The SLBMs are considered the safest missiles, which make them hard to locate & difficult to destroy.

These latest tests, that were conducted in secret, comes on the heels of 3 other tests that India has conducted in the last one year, taking India closer to possessing the nuclear triad - land based missiles, bombers & Submarine-launched ballistic missiles.

India doesn't have a nuclear submarine yet, to launch the SLBMs, in fact the DRDO used a pontoon, or a long tube, in the Bay of Bengal to conduct the test. Government officials have said that the tests have met all key parameters.

Cyclone Nargis

Cyclone Nargis (01B, also known as Very Severe Cyclonic Storm Nargis) was a strong tropical cyclone that caused the deadliest natural disaster in the recorded history of Burma (also known as Myanmar). Nargis is the deadliest named cyclone in the North Indian Ocean Basin, as well as the second deadliest named cyclone of all time, behind Typhoon Nina. Including unnamed storms, Nargis is the 8th deadliest cyclone of all time. Nargis was the first tropical cyclone to strike the country since Cyclone Mala made landfall in 2006.

The cyclone made landfall in the country on May 2, 2008, causing catastrophic destruction and at least 78,000 fatalities. Labutta Township alone was reported to have 80,000 dead and some have estimated the death toll may be well over 100,000.

  • Nargis developed on April 27 2008 in the central area of Bay of Bengal. Initially it tracked slowly northwestward and, encountering favorable conditions, it quickly strengthened.
  • Dry air weakened the cyclone on April 29, though after beginning a steady eastward motion Nargis rapidly intensified to attain peak winds of at least 165 km/h on May 2;
  • The Joint Typhoon Warning Center assessed peak winds of 215 km/h (135 mph).
  • The cyclone moved ashore in the Ayeyarwady Division of Burma near peak intensity and, after passing near the major city of Yangon (Rangoon), the storm gradually weakened until dissipating near the border of Burma and Thailand.

The Keoladeo Ghana National Park

  • The Keoladeo Ghana National Park, or the Bharatpur bird sanctuary, was artificially created in the 19th century by erecting small dykes and dams and diverting water from an irrigation canal into this low-lying area to serve as a game reserve for the Maharaja of Bharatpur who would hunt wild fowl here.
  • The bird sanctuary, once home to over 300 species of birds including openbills, spoonbills, egrets, cormorants, white ibis, harriers, fishing eagles, kingfishers and local and Siberian cranes is now attracting only around 50-80 species.
  • One of the world's 19 wetlands sites which is a sanctuary for migratory birds is facing destruction. The reason: it is not getting water to keep its flora and fauna alive.
  • In the wake of water shortage caused by scant rainfall in the area, the Keoladeo Ghana National Park, as it is officially known, has lost much of its charm. But the state government now hopes to revive it through an Rs 6 billion project.
  • Surplus water from the Yamuna River that flows into the Goverdhan drain will be brought to the sanctuary through a 19-km-long pipeline. The National Bank for Agriculture and Rural Development (Nabard) is expected to finance the project. It is expected to supply 350 million cubic feet {MCFT} of water to this sanctuary.

Monday, May 5, 2008

BlackBerry

Created by Research in Motion (RIM), a BlackBerry is a handheld wireless device, or personal digital assistant (PDA). BlackBerries read email and calendars from enterprise-class email systems, such as Indiana University's Exchange service, and most models also function as cell phones.

Hence

"A BlackBerry is an email/calendar reading device with some PDA abilities, and in some cases cell phone abilities."

Also, BlackBerries come with complete alphanumeric keyboards; many PDAs do not. While a BlackBerry is a type of PDA, it is not meant to be used in the same way as a Palm Pilot or PocketPC. Those devices are literally miniature computers that in some cases happen to have email capabilities.

General Packet Radio Service (GPRS)

General Packet Radio Service (GPRS) is a packet oriented Mobile Data Service which is available to users of Global System for Mobile Communications (GSM). It provides data rates from 56 up to 114 kbit/s.

GPRS can be used for services such as Wireless Application Protocol (WAP) access, Short Message Service (SMS), Multimedia Messaging Service (MMS), and for Internet communication services such as email and World Wide Web access. GPRS data transfer is typically charged per megabyte of traffic transferred, while data communication via traditional circuit switching is billed per minute of connection time, independent of whether the user actually is utilizing the capacity or is in an idle state.

GPRS is a best-effort packet switched service, as opposed to circuit switching, where a certain Quality of Service (QoS) is guaranteed during the connection for non-mobile users.

SIM Card (Subscriber Identity Module)

Subscriber Identity Module (SIM), commonly known as a SIM card is one of the key features of GSM. The SIM is a detachable smart card containing the user's subscription information and phonebook and allows the user to retain information after switching handsets.

Mars Express

Mars Express is a Mars exploration mission of the European Space Agency and the first planetary mission attempted by the agency.

"Express" originally referred to the speed and efficiency with which the spacecraft was designed and built.

"Express" also describes the spacecraft's relatively short interplanetary voyage, a result of being launched when the orbits of Earth and Mars brought them closer than they had been in about 60,000 years.

Mars Express consists of two parts, the Mars Express Orbiter and the Beagle 2, a lander designed to perform exobiology and geochemistry research. Although the lander failed to land safely on the Martian surface, the Orbiter has been successfully performing scientific measurements since Early 2004, namely, high-resolution imaging and mineralogical mapping of the surface, radar sounding of the subsurface structure down to the permafrost, precise determination of the atmospheric circulation and composition, and study of the interaction of the atmosphere with the interplanetary medium.

The spacecraft was launched on June 2, 2003 from Baikonur Cosmodrome in Kazakhstan, using a Soyuz-Fregat rocket. The Mars Express and Fregat booster were initially put into a 200 km Earth parking orbit, then the Fregat was fired again at 19:14 UT to put the spacecraft into a Mars transfer orbit.

The Fregat and Mars Express separated and the solar panels were then deployed and a trajectory correction maneuver was performed on June 4, 2003 to aim Mars Express towards Mars and allow the Fregat booster to coast into interplanetary space.

Venus Express

Venus Express is the first Venus exploration mission of the European Space Agency. It is currently in orbit around Venus and collecting scientific data

The mission was proposed in 2001 to reuse the design of the Mars Express mission.

It was launched by a Soyuz-Fregat rocket from the Baikonur Cosmodrome in Kazakhstan on 9 November 2005 into a parking Earth orbit and 1 h 36 min after launch put into its transfer orbit to Venus.

It arrived at Venus on April 11, 2006, after approximately 150 days of journey, and fired its main engine to reduce its velocity so that it could be captured by Venusian gravity into a nine day orbit.

The burn was monitored from ESA's Control Centre, ESOC, in Darmstadt, Germany.

Thursday, May 1, 2008

BIOFUELS

Biofuel (if cultivated, then also called agrofuel or agrifuel) can be broadly defined as solid, liquid, or gas fuel consisting of, or derived from recently dead biological material, most commonly plants. This distinguishes it from fossil fuel, which is derived from long dead biological material.

Biofuel can be theoretically produced from any (biological) carbon source. The most common by far is photosynthetic plants that capture solar energy. Many different plants and plant-derived materials are used for biofuel manufacture.

Biofuels are used globally and biofuel industries are expanding in Europe, Asia and the Americas. The most common use for biofuels is as liquid fuels for automotive transport. The use of renewable biofuels provides increased independence from petroleum and enhances energy security.

There are various current issues with biofuel production and use, which are presently being discussed in the popular media and scientific journals. These include:

* the effect of moderating oil prices, the "food vs fuel" debate,

* carbon emissions levels,

* sustainable biofuel production,

* deforestation and

* soil erosion, impact on water resources,

* human rights issues,

* poverty reduction potential,

* biofuel prices,

* energy balance and efficiency, and

* centralised versus decentralised production models.


One of the greatest technical challenges is to develop ways to convert biomass energy specifically to liquid fuels for transportation. To achieve this, the two most common strategies are:


* 1. Wood and its byproducts can be converted into biofuels such as woodgas, methanol or ethanol fuel. Some researchers are working to improve these processes.

* 2.To grow sugar crops (sugar cane, and sugar beet), or starch (corn/maize), and then use yeast fermentation to produce ethanol (ethyl alcohol).

* 3. To grow plants that (naturally) produce oils, such as oil palm, soybean, algae, or jatropha. When these oils are heated, their viscosity is reduced, and they can be burned directly in a diesel engine, or the oils can be chemically processed to produce fuels such as biodiesel.


More on http://en.wikipedia.org/wiki/Biofuel