June 2014



Thwaites Glacier Melting glaciers: A new study by researchers at NASA and the University of California, Irvine, finds a rapidly melting section of the West Antarctic Ice Sheet appears to be in an irreversible state of decline, with nothing to stop the glaciers in this area from melting into the sea. Read more ....

Squid Symbiosis: The small but charismatic Hawaiian bobtail squid is known for its predator-fooling light organ. To survive, the nocturnal cephalopod depends on a symbiotic association with a luminescent bacterium that gives it the ability to mimic moonlight on the surface of the ocean and, in the fashion of a Klingon cloaking device, deceive barracuda and other fish that would happily make a meal of the small creature. Read more ....

Coral reef Protective corals: Coral reefs are widely regarded as one of the most beautiful, diverse and delicate ecosystems on the planet. A new study by an international team of scientists reveals that reefs also play the tough guy role in protecting hundreds of millions of people from rising sea levels and damaging wave action. Read more .....

Sea anemone Oceanic life: A deep-water creature once thought to be one of the world's largest sea anemones, with tentacles reaching more than 6.5 feet long, actually belongs to a new order of animals. Read more ....

Batteries Harnessing waste heat: Vast amounts of excess heat are generated by industrial processes and by electric power plants; researchers around the world have spent decades seeking ways to harness some of this wasted energy. Most such efforts have focused on thermoelectric devices, solid-state materials that can produce electricity from a temperature gradient, but the efficiency of such devices is limited by the availability of materials. Read more ....

Aircraft Brain-controlled flight: Pilots of the future could be able to control their aircraft by merely thinking commands. Scientists of the Technische Universitat Munchen and the TU Berlin claim to have demonstrated the feasibility of flying via brain control - with astonishing accuracy. Read more ....




Pipes and pipe dreams

Pipes

While in school, math questions of the kind "If a small pipe fills up a cistern in 40 minutes and a big pipe fills up the cistern in 20 minutes, how long will it take for both the pipes together to fill up the cistern?" always had the effect of leaving me completely washed out.

Once I passed out of school, I thought pipes had passed out of my life also. But, no! That was only a pipe dream. The pipes made their appearance in aptitude questions later in life.

Having crossed that stage of life also, I was sure now pipes will not trouble me anymore. That again was wishful thinking.

Before leaving for work every day, I have to fill up a water storage tank. The narrow pipe I employed for the purpose took a long time to fill the tank. I obtained a wider pipe, and things have brightened up for me.

All these talk about pipes, has once again brought to mind the questions which tormented me in school. My question is: The wide pipe fills up the tank three times as fast as the narrow one. Both the pipes together fill up the tank in 40 minutes. How long does the narrow pipe, then, take to fill up the tank all on its own?






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Some useful links for
your career:


  • Union Public Service Commission - www.upsc.gov.in
  • IIT-Kharagpur - www.iitkgp.ac.in
  • Indian Statistical Institute - www.isical.ac.in
  • Indian Institute of Technology Madras - www.iitm.ac.in
  • Indian Institute of Management, Ahmedabad - www.iimahd.ernet.in
  • Indian Institute of Mass Commission - www.iimc.nic.in
  • IIT Bombay - www.iitb.ac.in
  • Indian School of Mines, Dhanbad - www.ismdhanbad.ac.in
  • Birla Institute of Technology, Ranchi - www.bitmesra.ac.in
  • Central Institute of Fisheries Nautical and Engineering Training - www.cifnet.nic.in
  • Indian Institute of Information Technology, Allahabad (Deemed University) - www.iiita.ac.in
  • Central Marine Fisheries Research Institute, Kochi - www.cmfri.com
  • Tata Institute of Social Sciences, Mumbai - www.tiss.edu

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