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Comment by Dr. Krishna Kumari Challa on July 22, 2015 at 7:03am

Our obligations — work, family and friends — often don’t line up with when our bodies want to sleep. Scientists call this phenomenon, the result of that shift in sleep schedule, social jetlag. It may also be associated with wider waistlines. As we learn more about how our body clocks work, it might help to think about how our own schedules can shift.

Social jetlag isn’t just about being groggy. Using a group of more than 1,000 New Zealanders from the town of Dunedin, followed throughout their lives and questioned regularly about their health, Parsons and other scientists showed that as little as a two-hour difference between weekday and weekend sleep schedules was associated with a higher body mass index, compared with people with no social jetlag. “It was an additional two [kilograms] of fat mass at age 38,” Parsons says. The authors published the work on January 20 in the International Journal of Obesity.

Social jetlag, obesity and metabolic disorder: investigation in a cohort study.

http://www.ncbi.nlm.nih.gov/pubmed/25601363

'Living against our internal clock' may contribute to metabolic dysfunction and its consequences. Further research aimed at understanding that the physiology and social features of social jetlag may inform obesity prevention and have ramifications for policies and practices that contribute to increased social jetlag, such as work schedules and daylight savings time.

Comment by Dr. Krishna Kumari Challa on July 20, 2015 at 6:19am

Comment by Dr. Krishna Kumari Challa on July 20, 2015 at 5:25am

Comment by Dr. Krishna Kumari Challa on July 18, 2015 at 12:46pm

Comment by Dr. Krishna Kumari Challa on July 18, 2015 at 11:38am

Comment by Dr. Krishna Kumari Challa on July 18, 2015 at 11:31am

Comment by Dr. Krishna Kumari Challa on July 17, 2015 at 7:04am

Big Data: Astronomical or Genomical?
Genetics is poised to overtake astronomy, YouTube and Twitter as a data-generating champion, Michael Schatz, a quantitative geneticist at Cold Spring Harbor Laboratory in New York and colleagues say. Challenges for collecting, analyzing, storing and sharing genetic data are already at least on par with some of the other most demanding big data endeavors, the researchers report July 7 in PLOS Biology.

The amount of genetic data doubles about every seven months. By 2025, researchers may have deciphered, or sequenced, 100 million to 2 billion human genomes — each the full set of genetic instructions for a person and each containing more than 3 billion DNA bases. Researchers are also compiling genetic data from thousands of species of microbes, animals and plants. No one knows for sure how much genetic information is currently available; thousands of laboratories around the world have DNA sequencing machines and most of the data are not yet in public databases.
If the doubling trend continues, genetics will soon catch up to radio astronomy’s vast data collections, Schatz says. He proposes that “genomical” may one day replace “astronomical” as an expression of gargantuan proportions. “Whether people will adopt ‘genomical,’ only time will tell,” he says.

Abstract

Genomics is a Big Data science and is going to get much bigger, very soon, but it is not known whether the needs of genomics will exceed other Big Data domains. Projecting to the year 2025, we compared genomics with three other major generators of Big Data: astronomy, YouTube, and Twitter. Our estimates show that genomics is a “four-headed beast”—it is either on par with or the most demanding of the domains analyzed here in terms of data acquisition, storage, distribution, and analysis. We discuss aspects of new technologies that will need to be developed to rise up and meet the computational challenges that genomics poses for the near future. Now is the time for concerted, community-wide planning for the “genomical” challenges of the next decade.

http://journals.plos.org/plosbiology/article?id=10.1371/journal.pbi...

Comment by Dr. Krishna Kumari Challa on July 16, 2015 at 8:07am

A new kind of subatomic particle called the pentaquark has been detected for the first time, the European Organization for Nuclear Research said on 14th July, 2015.
The lab, known by its French acronym CERN, said the findings were made by a team of scientists working on the LHCb experiment, one of the four at its Large Hadron Collider.
The existence of pentaquarks was first proposed in the 1960s by American physicists Murray Gell-Mann and Georg Zweig. Gell-Mann, who received the Nobel Prize in 1969, coined the term "quark" to describe the building blocks that make up hadrons — subatomic particles such as the proton and the neutron.
Until recently, only hadrons with two or three quarks had been found. In recent years, physicists have seen evidence of hadrons made up of four quarks, called tetraquarks.
Studying pentaquarks may help scientists to better understand "how ordinary matter, the protons and neutrons from which we're all made, is constituted."

Comment by Dr. Krishna Kumari Challa on July 14, 2015 at 7:23am

Comment by Dr. Krishna Kumari Challa on July 14, 2015 at 5:31am

World Population from Population Education on Vimeo.

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