Guest Post – Page 796 – Shamskm: A site to exchange knowledge and solutions

The Success of Homo sapiens May Be Due to Spatial Abilities

By Guest PostMay 12, 2012Scienceaesthetic stone, africa, altai mountains, anthropology, ariane burke, climate stress, cold climate, daniel baril, environmental condition, environmental stress, eurasia, Europe, glacial, homo ergaster, homo sapiens, iberian peninsula, middle east, middle paleolithic period, mystery, neanderthals, necklaces, northern plains, nuts, paleoanthropologist, plants, population stress, postglacial period, sexually differentiated, shellfish, social behaviour, spatial abilities, stress, success, symbolic objects, upper paleolithic period, weapon decorations

While the disappearance of Neanderthals remains a mystery, paleoanthropologists have an increasing understanding of what allowed their younger cousins, Homo sapiens, to conquer the planet. According to Ariane Burke, Professor in the Department of Anthropology at the Université de Montréal, the rapid dispersal of anatomically modern humans was not so much due to superior intelligence or improved hunting or gathering techniques, but rather to the creation of symbolic objects that allowed them to extend their social relations across vast territories.

Symbolism and social exchanges

Homo sapiens arrived in Europe some 45,000 years ago, from Africa. In less than 15,000 years, they managed to occupy the whole of Europe and Eurasia—an extremely rapid expansion. Neanderthals, on the other hand, were born of Europe, appearing on the continent more than 250,000 years ago, after their ancestors, Homo ergaster, had established there 600,000 years earlier. Though physiologically well adapted to the cold climate of the glacial and postglacial periods, why were Neanderthals not as successful as their newly landed rivals in colonizing the continent? (more…)

Portable Diagnostics Designed To Be Shaken, Not Stirred

By Guest PostMay 12, 2012Scienceashutosh shastry, asymmetrical surface, audio speaker, blood, energy, hannah hickey, karl bohringer, lotus effect, lotus leaf, medical researcher, menlo park, Nanotechnology, portable diagnostics, rough surface, saliva, smartphone, todd duncombe, university of washington, vibration, vibration frequency, water sample, yegan erdem

As medical researchers and engineers try to shrink diagnostics to fit in a person’s pocket, one question is how to easily move and mix small samples of liquid.

University of Washington researchers have built and patented a surface that, when shaken, moves drops along certain paths to conduct medical or environmental tests.

“This allows us to move drops as far as we want, and in any kind of layout that we want,” said Karl Böhringer, a UW professor of electrical engineering and bioengineering. The low-cost system, published in a recent issue of the journal Advanced Materials, would require very little energy and avoids possible contamination by diluting or electrifying the samples in order to move them. (more…)

You’re Beautiful, Vesta

By Guest PostMay 11, 2012Sciencedawn mission, meteorites from vesta, mineral data, protoplanet, protoplanet vesta, vesta

NASA’s UCLA-led Dawn mission shows protoplanet’s surprising surface

When UCLA’s Christopher T. Russell looks at the images of the protoplanet Vesta produced by NASA’s Dawn mission, he talks about beauty as much as he talks about science. (more…)

Peak Risk About 16 Years Old for Teens Misusing Prescription Drugs

By Guest PostMay 11, 2012Healthacceleration, adolescents, college age years, data, james c anthony, jonathan troost, michigan state university, misusing, prescriber, prescription drugs, public health, teens

EAST LANSING, Mich. — The peak risk for misusing prescription pain relievers occurs in mid-adolescence, specifically about 16 years old and earlier than many experts thought, according to a new study by Michigan State University researchers.

The results, based on recent nationwide surveys of nearly 120,000 U.S. adolescents, suggest prevention programs may need to be introduced earlier, in childhood and early adolescence, said James C. Anthony of MSU’s Department of Epidemiology and Biostatistics. (more…)

Many U.S. Families Are Underwater with Debts

By Guest PostMay 11, 2012Economydebt deflation theory, great recession, home mortgages, liquid assets, mortgage payments

ANN ARBOR, Mich.— As the country emerges from the Great Recession, a substantial number of U.S. families are underwater—and not just with their mortgages. (more…)

UA Project CENTRL a ‘Life-Changing Experience’

By Guest PostMay 11, 2012Politicsleadership program, mayor of cottonwood, project centrl

A leadership program sponsored by UA Cooperative Extension has created a network of public officials throughout rural Arizona.

Diane Joens has piled up an impressive list of accomplishments over the last decade: mayor of Cottonwood, Ariz., co-founder of Stewards of Public Lands, editor and publisher of The Verde River Almanac and champion of water rights, reclamation and downtown development. (more…)

Neuro Researchers Sharpen Our Understanding of Memories

By Guest PostMay 11, 2012Sciencealzheimer's disease, cells, chemical receptor, creb, excitatory neurons, israeli ran, jean claude lacaille, neurodegenerative disorder, neuron interconnection, synapses, understanding of memories, university of montreal

Scientists now have a better understanding of how precise memories are formed thanks to research led by Prof. Jean-Claude Lacaille of the University of Montreal’s Department of Physiology. “In terms of human applications, these findings could help us to better understand memory impairments in neurodegenerative disorders like Alzheimer’s disease,” Lacaille said. The study looks at the cells in our brains, or neurons, and how they work together as a group to form memories.

Chemical receptors at neuron interconnections called synapses enable these cells to form electrical networks that encode memories, and neurons are classified into two groups according to the type of chemical they produce: excitatory, who produce chemicals that increase communication between neurons, and inhibitory, who have the opposite effect, decreasing communication. “Scientists knew that inhibitory cells enable us to refine our memories, to make them specific to a precise set of information,” Lacaille explained. “Our findings explain for the first time how this happens at the molecular and cell levels.” (more…)

The ‘New’ Bing: Transforming Search from Finding to Doing

By Guest PostMay 10, 2012Technologybing, derrick connell, Facebook, gartner analyst, Google, hawaii, la bernardin restaurant, Microsoft, new bing, new feature, new york city, online, online services division, qi lu, ray valdes, relevancy, robert dietz, sally salas, search, stefan weitz, Technology, Twitter, web, web page, web search

Bing’s new user experience surfaces the best from the Web, friends and experts to help people do more.

REDMOND, Wash. – May 10, 2012 – Microsoft today unveiled a major update to its Bing search engine that fundamentally transforms the way users search the Web. The update, the most significant since Microsoft launched Bing three years ago, is designed to help users act quickly by taking advantage of the Web’s evolving fabric.

With the new version of Bing, rolling out over the coming weeks and broadly available in the U.S. in early June, people can easily get advice and recommendations from friends and experts with the new social sidebar. They can also view useful, action-oriented information via the new snapshot feature. And they can find what they’re looking for faster, with more relevant results and a refreshed user interface. All of this is presented in a new, three-column design that focuses on helping users take the leap from finding information to making quick, informed decisions. (more…)

Author Archives: Guest Post