An anonymous reader writes "Astronomer and gamer Scott Manley (more famous for his Kerbal Space program coverage) has created a fantastic video explaining the science behind building guns that could one day be used to launch payloads into space. It's not as easy as simply making a bigger gun, there's a whole host of unorthodox 'gun' designs which work around the limitations of garden variety propellants."
Slashdot stories can be listened to in audio form via an RSS feed, as read by our own robotic overlord.
McGruber writes "ABC News/ESPN broke the story that a team of scientists from the National Institutes of Health (NIH) analyzed the brain tissue of renowned NFL linebacker Junior Seau and have concluded that the football player suffered a debilitating brain disease likely caused by two decades worth of hits to the head. From the article: 'In May 2012, Seau, 43 — football's monster in the middle, a perennial all-star and defensive icon in the 1990s whose passionate hits made him a dominant figure in the NFL — shot himself in the chest at his home in Oceanside, Calif., leaving behind four children and many unanswered questions.' As Slashdot earlier reported, more than 30 NFL players have in recent years been diagnosed with chronic traumatic encephalopathy (CTE), a condition once known as 'punch drunk' because it affected boxers who had taken multiple blows to the head."
sciencehabit writes "All you graying, half-deaf Def Leppard fans, listen up. A drug applied to the ears of mice deafened by noise can restore some hearing in the animals. By blocking a key protein, the drug allows sound-sensing cells that are damaged by noise to regrow. The treatment isn't anywhere near ready for use in humans, but the advance at least raises the prospect of restoring hearing to some deafened people."
coondoggie writes "With China once again playing games with the rare earth materials it largely holds sway over, the U.S. Department of Energy today said it would set up a research and development hub that will bring together all manner of experts to help address the situation. The DOE awarded $120 million to Ames Laboratory to set up an Energy Innovation Hub that will develop solutions to the domestic shortages of rare earth metals and other materials critical for U.S. energy security, the DOE stated."
Zothecula writes "Fireflies have helped an international team of scientists get over 50 percent more light out of existing LED bulbs. It was discovered that in the Photuris genus of firefly, scales in the insect's exoskeleton possess optical qualities that boost the amount of bioluminescence that can shine through. Those same qualities were found to dramatically increase the light output of an LED bulb."
astroengine writes "As the potentially hazardous asteroid makes closest approach to Earth today, astronomers using the European Herschel Space Observatory have announced something a little unsettling: asteroid 99942 Apophis is actually bigger than we thought. Herschel astronomers have deduced that Apophis is 1,066 feet (325 meters) wide. That's 20 percent larger than the previous estimate of 885 feet (270 meters). 'The 20 percent increase in diameter, from 270 to 325 m, translates into a 75 percent increase in our estimates of the asteroid's volume or mass,' said Thomas Müller of the Max Planck Institute for Extraterrestrial Physics in Garching, Germany, and lead scientist of the study. In addition, the space telescope has re-analyzed the albedo of the space rock, providing a valuable heat map of the object's surface — data that will improve orbital trajectory models."
skade88 writes "Boston has seen 10 times more flu cases this year than last. They are now up to 700 cases and counting, with 18 deaths in the city. The city of Boston has declared a public health emergency in the wake of the epidemic. 'The CDC said the proportion of people visiting health care providers with flu-like symptoms climbed from 2.8 percent to 5.6 percent in four weeks. By contrast, the rate peaked at only 2.2 percent during the relatively mild 2011-2012 flu season. The estimated rate of flu-related hospitalizations in the U.S. was 8.1 per 100,000 people, which is high for this time of year, according to Dr. Joe Bresee, chief of the epidemiology and prevention branch of the CDC’s influenza division. The agency’s next advisory will be issued Friday.' As previously discussed on Slashdot it would also be nice for your friends and coworkers for you to stay home if you are sick."
sciencehabit writes "If carrion flies have one enviable talent, it's finding animal carcasses in the wilderness, something they surpass even the most systematic and intrepid field biologists at doing. Now, researchers may be able to capitalize on the insects' gruesome gift to survey biodiversity. Capture the flies, a new study shows, and DNA from their last meals will tell you which animals live in the area. In addition to scanning an area's biodiversity, the technique has the potential to reveal species that are new to science."
New submitter redhat_redneck writes "The U.S. and Canada has been experiencing a shortage of barium sulfate, which is used as contrast for upper and lower GI studies. It has reached the point where doctors are being asked not to order these exams except in emergencies, and some exams are being cancelled. Here's the letter that's been put out by the manufacturer. The longer this drags on, the more serious this issue becomes, eventually impacting patients and healthcare providers in both cost and quality of care. Some sources point to a dramatic drop in Chinese production. In their defense, it seems China is changing safety regulations. Medical use only make a fraction of the uses of barium sulfate, but it's going to be disproportionately affected by this shortage. We can't go back to our old contrast Thorotrast; it causes cancer. Does anyone know of alternatives to barium?"
mrbluze writes "The standard kilogram weights used by countries around the world for calibration have variably increased in mass by tens of micrograms. This poses a threat to the precision and comparability of measurements in science, engineering and trade. The problem is due to surface contamination, but a safe method of cleaning the weights has only recently been devised by the use of ozone and ultraviolet light (abstract). 'The ultraviolet light-ozone treatment removes hydrocarbon contamination that has built up on the metal surface, gunk that comes from the emissions of an industrial society. Cumpson suspects that because the kilos living in national labs have been retrieved and handled more frequently than the international kilo, more carbon-containing contaminants have built up on them over time. Incubating the kilograms with a set amount of ozone and ultraviolet light "gently breaks up the carbonaceous contamination at the surface."'"
ATKeiper writes "Thomas Kuhn's landmark book The Structure of Scientific Revolutions just turned fifty years old. In that book, Kuhn coined the expression 'paradigm shift' to describe revolutionary changes in scientific fields — such as the replacement of the geocentric understanding of the universe with the heliocentric model of the solar system. The book was hotly debated for claiming that different scientific paradigms were 'incommensurable,' which implied (for example) that Newton was no more right about gravity than Aristotle. A new essay in The New Atlantis revisits the controversy and asks whether the fact that Kuhn based his argument almost exclusively on physics means that it does not apply as well to major developments in biology or, for that matter, to the social sciences."
astroengine writes "NASA's newest rover on Mars has recently used its Dust Removal Tool for the first time, clearing away a patch of rust-colored dust coating its latest target: a slab of rock called "Ekwir_1." The Dust Removal Tool, or DRT (yes, the rover's cleaning instrument is called "dirt") is a motorized brush with stainless steel wire bristles located on Curiosity's multipurpose Robotic Arm turret — a veritable Swiss Army knife of planetary exploration tools." Reader Sez Zero links to a story on the brushing action at the BBC, which adds that "Curiosity is building towards using its hammer-drill, the last major tool yet to be deployed on the mission." So at least we know there's dirt on Mars, even if they chose not to send a dedicated life sensor, too. The Aeon piece is well worth reading, if that decision sounds perverse.
Hugh Pickens writes writes "ABC News reports that Indiana University Health Goshen Hospital has fired eight employees after they refused mandatory flu shots, stirring up controversy over which should come first: employee rights or patient safety. The fired nurses include Joyce Gingerich and Sue Schrock who filed appeals on religious grounds. 'I feel like in my personal faith walk, I have felt instructed not to get a flu vaccination, but it's also the whole matter of the right to choose what I put in my body...' adding that she has not had a flu vaccine for 30 years as a result of a choice she made because of her Christian faith. Over the last several years, hospitals have been moving toward mandatory vaccinations because many only have 60 percent vaccination rates says Dr. William Schaffner, chair of preventive medicine at Vanderbilt University Medical Center. Schaffner adds that nurses in particular tend to be the most reluctant to get vaccinated among health care workers, 'There seems to be a persistent myth that you can get flu from a flu vaccine among nurses,' says Schaffner. 'They subject themselves to more influenza by not being immunized, and they certainly do not participate in putting patient safety first.' But Jane M. Orient, M.D., executive director of the Association of American Physicians and Surgeons, says the scientific case for flu vaccine mandates is very weak and that there is no evidence showing that vaccinated workers are less likely to transmit virus. 'The scientific and religious concerns are in a sense backward,' says Orient. 'Advocates of the mandate are full of evangelical zeal and are quick to portray skeptics as wicked and selfish. It's like a secular religion, based on faith in vaccine efficacy and safety.'"
netbuzz writes "Losing a single laptop containing sensitive personal information about 441 patients will cost a non-profit Idaho hospice center $50,000, marking the first such HIPAA-related penalty involving fewer than 500 data-breach victims. Yes, the data was not encrypted. 'This action sends a strong message to the health care industry that, regardless of size, covered entities must take action and will be held accountable for safeguarding their patients' health information,' says the Department of Health and Human Services."
sciencehabit writes "Imagine life on a spaceship headed to Mars. You and your five crewmates work, exercise, and eat together every day under the glow of fluorescent lights. As the months pass, the sun gets dimmer and communication with Earth gets slower. What does this do to your body? According to an Earth-based experiment in which six volunteers stayed in a windowless 'spaceship' for nearly a year and a half, the monotony, tight living space, and lack of natural light will probably make you sleep more and work less. Space, for all intents and purposes, turns you into a couch potato."