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Comment by Dr. Krishna Kumari Challa on July 8, 2014 at 6:08am

Comment by Dr. Krishna Kumari Challa on July 8, 2014 at 6:01am

Comment by Dr. Krishna Kumari Challa on July 8, 2014 at 5:56am

Major Scientific Journal Joins Push to Screen Statistics in Papers It Publishes
Science's new policy follows efforts by other journals to bolster standards of data analysis
The journal Science is adding an extra round of statistical checks to its peer-review process, editor-in-chief Marcia McNutt announced on July 3. The policy follows similar efforts from other journals, after widespread concern that basic mistakes in data analysis are contributing to the irreproducibility of many published research findings. “As most journals are weak in statistical review, this damages the quality of what they publish. For the majority of scientific papers nowadays statistical review is more essential than expert review”. Most biomedical journals such as Annals of Internal Medicine, the Journal of the American Medical Association and The Lancet pay strong attention to statistical review.
Manuscript will be flagged up for additional scrutiny by the journal’s internal editors, or by its existing Board of Reviewing Editors (more than 100 scientists whom the journal regularly consults on papers) or by outside peer reviewers. The SBoRE panel will then find external statisticians to review these manuscripts.
Right step to improve the field of science!

Comment by Dr. Krishna Kumari Challa on July 7, 2014 at 5:38am

Scientists from Indian Institute of Science (IISc), Bangalore have developed a new non-invasive technique to identify dangerous and hazardous chemicals hidden inside any container including explosives.

This new technique, in addition, can also be used to as diagnostic tool for detection of tumors.

Prof Siva Umapathy from Inorganic and Physical Chemistry Department, IISc and his student Sanchita Sil, High Energy Materials Research Laboratory, Pune, said this new method can also be used for obtaining signals from samples which are concealed or packed inside containers such as commercial pastic bottles, thick papers, envelopes, coloured glass bottles etc.,

The novel technique is based on Raman spectroscopy--Universal Multile Angle Raman Sectroscopy (UMARS) and relies on illuminating the sample with the light source, which provides scattered light, offering molecular specific signatures to identify the chemical susstance, according to a research paper published in Nature Scientific Reports Journal dated June 16-2014.

Comment by Dr. Krishna Kumari Challa on July 6, 2014 at 6:19am

Science behind Fireworks:
https://news.yahoo.com/video/science-behind-fireworks-090620867.html

Comment by Dr. Krishna Kumari Challa on July 6, 2014 at 6:08am

In the past, scientists concluded many of man’s defining qualities, such as legs made for walking upright and a large brain, evolved all at once. But according to a new study in the journal Science, shifts in climate caused these qualities to evolve separately.
''Evolution of early Homo: An integrated biological perspective ''
http://www.sciencemag.org/content/345/6192/1236828.abstract

Based on analyses of fossil evidence, the study researchers said the shrinking of forests and expansion of savannas in East Africa led to walking upright, which freed our forebears’ hands up for the creation and use of stone tools.

“Unstable climate conditions favored the evolution of the roots of human flexibility in our ancestors,” said study author Richard Potts, curator of anthropology and director of the Human Origins Program at the Smithsonian’s National Museum of Natural History. “The narrative of human evolution that arises from our analyses stresses the importance of adaptability to changing environments, rather than adaptation to any one environment, in the early success of the genus Homo.”

The study team found the predecessors of Homo erectus didn’t evolve in a series of progressively advanced iterations. Instead, a patchwork of at least three species lived alongside each other and the evolution of these species was driven by long-term climate factors in the region.

Comment by Dr. Krishna Kumari Challa on July 4, 2014 at 6:42am

Tibetans live high life thanks to extinct human relatives
Modern people’s DNA adaptation to altitude passed down from ancient Denisovans
Tibetans inherited a genetic adaptation to high altitudes from an extinct group of human relatives called Denisovans, a new study finds.

Researchers have known for years that Tibetans carry a genetic variant in the EPAS1 gene that allows them to survive at extreme altitudes where oxygen is scarce. But how that variant arose has been mysterious. Now researchers report July 2 in Nature that the high-altitude version of EPAS1 almost certainly came from Denisovans or from a related group of extinct humans.

https://www.sciencenews.org/article/tibetans-live-high-life-thanks-...

Comment by Dr. Krishna Kumari Challa on July 4, 2014 at 6:19am

BRAIN BASICS: ATTENTION

Comment by Dr. Krishna Kumari Challa on July 4, 2014 at 5:46am

Elastic Cloaking Material Makes Objects “Unfeelable”
Move over, invisibility cloaks. There's a structure that can keep objects from being felt or jostled
Scientists have developed an "unfeelability cloak," a material that hides objects within it from being felt or touched. The researchers suggest that in the future such cloaks might find help protect objects from bumps and pokes that might otherwise harm them.
Invisibility cloaks work by smoothly guiding light waves around objects so the waves ripple along their original trajectories as if nothing were there to block them. Scientists have designed cloaking materials that work against other kinds of waves as well—for example, inaudibility cloaks hide objects from the acoustic waves used in sonar.
The unfeelability cloak is a so-called pentamode metamaterial, an artificial structure that, despite being a solid, can behave like a fluid; although difficult to compress, its shape is otherwise easy to shift. The specific material the researchers devised is a three-dimensional hexagonal lattice reminiscent of a honeycomb, with the rods making up this lattice wider at their middles than at their ends.
The scientists built the cloak around the object they intended to hide, a rigid hollow cylinder that itself could hide anything big enough to fit within it. To simultaneously create both the cloak and the cylinder, the researchers shone an infrared laser beam into a vat of light-sensitive fluid, with plastic shapes hardening where the laser beam had focused. The resulting cloak was made of rods only about 40 microns long and 10 microns thick at their widest points, built around a cylinder 750 microns in diameter with walls 125 microns wide.
http://www.nature.com/ncomms/2014/140619/ncomms5130/full/ncomms5130...

Comment by Dr. Krishna Kumari Challa on July 3, 2014 at 9:37am

Studies that claimed simple way to make stem cells withdrawn after 'extensive' errors found
The scientists who reported in January that they'd found a startlingly simple way to make stem cells have withdrawn that claim, following accusations of falsified data. On Wednesday, July 2, 2014, the journal Nature released a statement from the scientists who acknowledged "extensive" errors and said they couldn't say "without a doubt" that their method works.

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