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Dear Reader ,
Here is your customized Phys.org Newsletter for week 15:
{#if !empty($img)#}  | {#/if#} Two young men in their late teens sit in adjacent rooms of an inner-city emergency room. One is getting care for injuries he suffered in a fight, the other, for a sore throat. When the nurse tells each one he can go, both head back out to an environment rampant with violence, poverty and traumatic life experiences.
{#if !empty($img)#}   | " width="60" height="60" alt=""> {#/if#} A study published today on the safety of human breast milk bought over the Internet found that 10 percent of samples contained added cow's milk. The discovery that purchased samples of human milk may be purposely "topped off" with cow's milk or infant formula confirms a danger for the large number of babies receiving the purchased milk due to medical conditions. These babies are also vulnerable to the risk of infectious disease from bacterial and viral contamination of such milk, which was identified in a prior study by the same research team led by Nationwide Children's Hospital.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} India's government launched a new air quality index on Monday, under intense pressure to act after the World Health Organization declared New Delhi the world's most polluted capital.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Prime Minister Narendra Modi on Monday blamed the changing lifestyles that have come with India's economic development for rising pollution levels that have given the country some of the world's dirtiest air.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} The Do Not Track (DNT) requests that a web application disable its tracking individual users. Well, Microsoft announced it is changing how Do Not Track (DNT) is implemented in future versions of their browsers. They will no longer enable it as the default state in Windows Express Settings. Dropping the default. Finished. The End. Internet Explorer will stop sending DNT signals to websites by default. According to Neil McAllister in The Register, "DNT will now ship disabled by default in Microsoft's browsers – including both IE and the new Project Spartan."
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} (Phys.org)—The speed of light, c, is one of the best-known constants, having a value of just under 300,000,000 meters per second in a vacuum. But in some alternative theories of cosmology, the speed of light is not actually constant, but varies throughout time and space. Observational data in support of variations in the speed of light are lacking, but in a new paper, physicists have proposed a way to constrain possible speed-of-light variations and show that future experiments might be able to detect these variations, if large enough.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Although it is arguable as to whether plants have all five human senses – sight, scent, hearing, taste and touch – they do have a unique sense of gravity, which is being tested in space. Researchers with the Japan Aerospace Exploration Agency will conduct a second run of the Plant Gravity Sensing study after new supplies are delivered by the sixth SpaceX commercial resupply mission to theInternational Space Station. The research team seeks to determine how plants sense their growth direction without gravity. The study results may have implications for higher crop yield in farming and for cultivating plants for long-duration space missions.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Earlier today, the world's most powerful particle accelerator began its second act. After two years of upgrades and repairs, proton beams once again circulated around the Large Hadron Collider, located at the CERN laboratory near Geneva, Switzerland.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} The distance to celestial objects is key to calculating their intrinsic properties like mass and luminosity. Distance, unfortunately, is also one of the most difficult parameters to measure. The most direct method is called parallax: When a celestial body is viewed from different, widely separated vantage points, its angular position with respect to background stars appears different. Parallax is traditionally used to triangulate the distances to nearby stars by measuring their apparent angles six months apart, at the two opposite sides of the Earth's orbit around the Sun.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Polio is about to be eradicated. By 2018, if all goes according to the World Health Organization's plans, the last diagnosis of paralytic polio would mark the end of the devastating, potentially fatal illness.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} In experiments where human skin tissue samples were exposed to low doses of ionizing radiation, scientists at Pacific Northwest National Laboratory found that a skin tissue model showed perturbations that suggest its stability is altered. This, in turn, could change skin's sensitivity after exposure to insults, such as infection.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Pinpointing the culprits responsible for errors in large-scale climate models can take a mathematical magnifier. To identify these transgressors, scientists at Pacific Northwest National Laboratory, Sandia National Laboratories, and University of Michigan developed a novel technique that efficiently measures and identifies time-resolution errors in the most complex weather and climate models. Applying the new method to the Community Atmosphere Model version 5 (CAM5) revealed that the primary source of time-resolution errors belongs to the calculations that represent stratiform clouds, those ubiquitous and dreary-day rain-makers.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} People undergoing treatment for HIV-1 have an increased risk for earlier onset of age-related illnesses such as some cancers, renal and kidney disease, frailty, osteoporosis and neurocognitive disease. But is it because of the virus that causes AIDS or the treatment?
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} The prevalence of burnout in medicine appears to be high. One 2012 study showed that 46% of physicians report at least one symptom of burnout. Moreover, burnout is more common among physicians than other highly educated groups.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} A fear of spiders, arachnophobia, is in our DNA. You don't learn to freeze at the site of these creatures; you're born with the fear. Even the sight of hypodermic needles and houseflies does not trigger a similar response. Scientists pin that fear on survival instinct. The theory goes like this: Humans evolved in Africa where being able to spot a spider was of necessity.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Human beings are information seekers. We are constantly taking in details – big and small – from our environment. But the majority of the stuff we encounter in a given day we rarely need to remember. For instance, what are the chances that you need to remember where you ate lunch with a friend last Wednesday?
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Leading Edge Asynchronous Propeller Technology (LEAPTech) project researchers at NASA's Armstrong Flight Research Center are performing ground testing of a 31-foot-span, carbon composite wing section with 18 electric motors.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} A new study has helped settle the controversial relationships among the major groups of lizards and snakes, and it sheds light on the origins of a group of giant fossil lizards.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Benton N. Calhoun, Commonwealth Associate Professor of Electrical and Computer Engineering, has been selected as the co-winner of the 2015 Edlich-Henderson Innovator of the Year Award, given by the University of Virginia's Licensing & Ventures Group.
{#if !empty($img)#}  | " width="60" height="60" alt=""> {#/if#} Excessive use of first-person singular pronouns, or 'I-talk,' is not clearly linked to a sense of self-importance and an overabundance of self-focus.
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