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Asteroid Impacts Bigger Risk Than Thought 88

Posted by Unknown Lamer
from the just-build-space-lasers dept.
Rambo Tribble (1273454) writes "The B612 Foundation, a U.S.-based nuclear test monitoring group, has disclosed that their acoustic sensors show asteroid impacts to be much more common than previously thought. Between 2000 and 2013 their infrasound system detected 26 major explosions due to asteroid strikes. The impacts were gauged at energies of 1 to 600 kilotons, compared to 45 kilotons for 1945 Hiroshima bomb."

The $5,600 Tablet 83

Posted by Soulskill
from the go-big-or-go-home dept.
An anonymous reader writes "Tablets have come a long way in the past few years, and it has become possible to find a capable device for under $200. But what about the tablets pushing toward the high end of the spectrum? Xplore Technologies sells a line of tablets that top out at $5,600. Who on earth would pay that much? The military, of course. 'The DMSR models both have handles and are encased in tough protective covers. They can be dropped more than 2 meters onto a plywood floor and 1.2 meters onto concrete, and can operate in temperatures between -30 and 140 degrees Fahrenheit (-34 to 60 degrees Celsius). They've been tested to the U.S. military's tough MIL-STD-810G standard for extreme conditions. The tablets run Windows and come with Intel's latest Core i5 or i7 Haswell processors. Solid-state drive options extend to 480GB. ... They display images at 1024 x 768 resolution. That's less than some cheaper Windows tablets, but Xplore claims to offer excellent LCD visibility in sunlight thanks to a display luminescence of 1,300 NITS. The tablets have internal fans but can still run for up to eight-and-a-half hours on a 10-cell battery, Xplore said. They weigh a hefty 2.4 kilograms.'"
United States

The US Public's Erratic Acceptance of Science 465

Posted by Soulskill
from the pi-is-exactly-3 dept.
An anonymous reader writes "The U.S. general population is often the butt of jokes with regard to their understanding of science. A survey by the Associated Press now shows just how arbitrary and erratic the public's dissent can be. 'The good news is that more than 80 percent of those surveyed are strongly confident that smoking causes cancer; only four percent doubt it. Roughly 70 percent accepted that we have a genome and that mental illness is seated in the brain; about 20 percent were uncertain on these subjects, and the doubters were few. But things go downhill from there. Only about half of the people accepted that vaccines are safe and effective, with 15 percent doubting. And that's one of the controversial topics where the public did well. As for humanity's role in climate change, 33 percent accepted, 28 percent were unsure, and 37 percent fell in the doubter category. For a 4.5-billion-year-old Earth and a 13.8-billion-year-old Big Bang, acceptance was below 30 percent. Fully half of the public doubted the Big Bang (PDF).'"

Experts Say Hitching a Ride In an Airliner's Wheel Well Is Not a Good Idea 228

Posted by Unknown Lamer
from the don't-forget-your-jacket dept.
Hugh Pickens DOT Com (2995471) writes "Hasani Gittens reports that as miraculous as it was that a 16-year-old California boy was able to hitch a ride from San Jose to Hawaii and survive, it isn't the first time a wheel-well stowaway has lived to tell about it. The FAA says that since 1947 there have been 105 people who have tried to surreptitiously travel in plane landing gear — with a survival rate of about 25 percent. But agency adds that the actual numbers are probably higher, as some survivors may have escaped unnoticed, and bodies could fall into the ocean undetected. Except for the occasional happy ending, hiding in the landing gear of a aircraft as it soars miles above the Earth is generally a losing proposition. According to an FAA/Wright State University study titled 'Survival at High Altitudes: Wheel-Well Passengers,' at 20,000 feet the temperature experienced by a stowaway would be -13 F, at 30,000 it would be -45 in the wheel well — and at 40,000 feet, the mercury plunges to a deadly -85 F (PDF). 'You're dealing with an incredibly harsh environment,' says aviation and security expert Anthony Roman. 'Temperatures can reach -50 F, and oxygen levels there are barely sustainable for life.' Even if a strong-bodied individual is lucky enough to stand the cold and the lack of oxygen, there's still the issue of falling out of the plane. 'It's almost impossible not to get thrown out when the gear opens,' says Roman.

So how do the lucky one-in-four survive? The answer, surprisingly, is that a few factors of human physiology are at play: As the aircraft climbs, the body enters a state of hypoxia—that is, it lacks oxygen—and the person passes out. At the same time, the frigid temperatures cause a state of hypothermia, which preserves the nervous system. 'It's similar to a young kid who falls to the bottom of an icy lake," says Roman. "and two hours later he survives, because he was so cold.'"

Eyes Over Compton: How Police Spied On a Whole City 188

Posted by Unknown Lamer
from the wait'll-it's-drone-enabled dept.
Advocatus Diaboli (1627651) writes with some concerning news from the Atlantic. From the article: "In a secret test of mass surveillance technology, the Los Angeles County Sheriff's Department sent a civilian aircraft over Compton, California, capturing high-resolution video of everything that happened inside that 10-square-mile municipality. Compton residents weren't told about the spying, which happened in 2012. 'We literally watched all of Compton during the times that we were flying, so we could zoom in anywhere within the city of Compton and follow cars and see people,' Ross McNutt of Persistence Surveillance Systems told the Center for Investigative Reporting, which unearthed and did the first reporting on this important story. The technology he's trying to sell to police departments all over America can stay aloft for up to six hours. Like Google Earth, it enables police to zoom in on certain areas. And like TiVo, it permits them to rewind, so that they can look back and see what happened anywhere they weren't watching in real time."

Oklahoma Moves To Discourage Solar and Wind Power 433

Posted by samzenpus
from the who-needs-the-sun? dept.
Hugh Pickens DOT Com (2995471) writes "Paul Monies reports at NewsOK that Oklahoma's legislature has passed a bill that allows regulated utilities to apply to the Oklahoma Corporation Commission to charge a higher base rate to customers who generate solar and wind energy and send their excess power back into the grid reversing a 1977 law that forbade utilities to charge extra to solar users. 'Renewable energy fed back into the grid is ultimately doing utility companies a service,' says John Aziz. 'Solar generates in the daytime, when demand for electricity is highest, thereby alleviating pressure during peak demand.'

The state's major electric utilities backed the bill but couldn't provide figures on how much customers already using distributed generation are getting subsidized by other customers. Oklahoma Gas and Electric Co. and Public Service Co. of Oklahoma have about 1.3 million electric customers in the state. They have about 500 customers using distributed generation. Kathleen O'Shea, OG&E spokeswoman, said few distributed generation customers want to sever their ties to the grid. 'If there's something wrong with their panel or it's really cloudy, they need our electricity, and it's going to be there for them,' O'Shea said. 'We just want to make sure they're paying their fair amount of that maintenance cost.' The prospect of widespread adoption of rooftop solar worries many utilities. A report last year by the industry's research group, the Edison Electric Institute, warns of the risks posed by rooftop solar (PDF). 'When customers have the opportunity to reduce their use of a product or find another provider of such service, utility earnings growth is threatened," the report said. "As this threat to growth becomes more evident, investors will become less attracted to investments in the utility sector.''"

Venus' Crust Heals Too Fast For Plate Tectonics 131

Posted by samzenpus
from the too-hot-to-crack dept.
An anonymous reader writes in with an interesting look at how important plate tectonics may be to life and why the crust on Venus works differently than it does on Earth. "Without plate tectonics, carbon would build up in the atmosphere. Venus, which does not have tectonics, shows the results: an atmosphere that is 96 percent carbon dioxide. It's toxic. Yet Venus is about the same size and composition as our planet, so why doesn't it have plate tectonics? Some researchers made a model to explore how Earth initiated plate movements, and these same researchers made one model of its neighbor for comparison. A 1.5-billion-year-old Earth and a similarly aged Venus were modeled as a hot, mushy material made of tiny particles of rock. The model uses physics at the one-millimeter rock grain scale to explain how the whole planet behaves. According to David Bercovici, a geophysicist at Yale who was an author on the paper, the model also shows how plate tectonics emerged on Earth but not on her twin."

Biofuels From Corn Can Create More Greenhouse Gases Than Gasoline 158

Posted by timothy
from the as-long-as-it-looks-good dept.
New submitter Chipmunk100 (3619141) writes "Using corn crop residue to make ethanol and other biofuels reduces soil carbon and can generate more greenhouse gases than gasoline, according to a study published today in the journal Nature Climate Change. The findings by a University of Nebraska-Lincoln team of researchers cast doubt on whether corn residue can be used to meet federal mandates to ramp up ethanol production and reduce greenhouse gas emissions."

LADEE Probe Ends Its Mission On the Far Side Of the Moon 24

Posted by timothy
from the in-lieu-of-flowers dept.
The mission of NASA's LADEE probe was brought to an intentional violent end yesterday, when it smashed into the far side of the moon. As the Ars Technica report explains, "NASA's policy is to treat the locations of the Moon landings as historical sites, and it takes pains to preserve them from possible damage. LADEE didn't have the fuel to control its orbit indefinitely. As a result, the controllers had been preparing to terminate the probe for several weeks. ... The exact moment of impact isn't clear, since the precise terrain it hit couldn't be determined in advance. (If it hit a ridge, it would have happened earlier than if LADEE plowed across a plain. What is clear is that the impact destroyed the probe." Before the end of LADEE's mission, besides close up observations, the craft was used to test a new laser-based communication system.

RIP, NASA Moon Landing Engineer John C. Houbolt 33

Posted by timothy
from the why-when-he-was-a-boy dept.
The Houston Chronicle reports the death of John C. Houbolt, whose ideas helped guide the U.S. moon-landing programs. Houbolt died on Tuesday at the age of 95, in a nursing home in Maine. Says the Chronicle's obituary: "His efforts in the early 1960s are largely credited with convincing NASA to focus on the launch of a module carrying a crew from lunar orbit, rather than a rocket from earth or a space craft while orbiting the planet. Houbolt argued that a lunar orbit rendezvous, or lor, would not only be less mechanically and financially onerous than building a huge rocket to take man to the moon or launching a craft while orbiting the earth, but lor was the only option to meet President John F. Kennedy's challenge before the end of the decade."

3 Former Astronauts: Earth-Asteroid Collisions Are a Real But Preventable Danger 70

Posted by timothy
from the asteroid-survival-movies-are-great dept.
Three former astronauts — Ed Lu, Tom Jones, and Bill Anders — say that reassuring figures about the rarity of asteroid collisions with Earth are perhaps too reassuring. The B612 Foundation, of which Lu is a director, has been established to draw public awareness to the risks of a large asteroid hitting a population center -- which these three men say is a far more serious public danger than has been acknowledged by NASA and other agencies. And beyond awareness, the Foundation's immediate goal is to raise money to " design and build an asteroid-finding space telescope and launch it by 2017," and then, Armageddon-style, to follow that up with technology to divert any asteroids whose path would threaten earth.

Plant Breeders Release 'Open Source Seeds' 136

Posted by samzenpus
from the people's-meadow dept.
mr crypto (229724) writes "A group of scientists and food activists are launching a campaign to change the rules that govern seeds. They're releasing 29 new varieties of crops under a new 'open source pledge' that's intended to safeguard the ability of farmers, gardeners and plant breeders to share those seeds freely."

NASA Proposes "Water World" Theory For Origin of Life 115

Posted by samzenpus
from the from-the-water dept.
William Robinson (875390) writes "A new study from researchers at Nasa's Jet Propulsion Laboratory has proposed the "water world" theory as the answer to our evolution, which describes how electrical energy naturally produced at the sea floor might have given rise to life. While the scientists had already proposed this hypothesis called 'submarine alkaline hydrothermal emergence of life' the new report assembles decades of field, laboratory and theoretical research into a grand, unified picture."

Kepler-186f: Most 'Earth-Like' Alien World Discovered 239

Posted by timothy
from the fire-up-the-speculation-device dept.
astroengine (1577233) writes "About 500 light-years away in the constellation Cygnus lives a star, which, though smaller and redder than the sun, has a planet that may look awfully familiar. With a diameter just 10 percent bigger than Earth's, the newly found world is the first of its size found basking in the benign temperature region around a parent star where water, if it exists, could pool in liquid form (abstract). Scientists on the hunt for Earth's twin are focused on worlds that could support liquid surface water, which may be necessary to brew the chemistry of life. "Kepler-186f is significant because it is the first exoplanet that is the same temperature and the same size (well, ALMOST!) as the Earth," David Charbonneau, with the Harvard-Smithsonian Center for Astrophysics, wrote in an email to Discovery News. "Previously, the exoplanet most like Earth was Kepler-62f, but Kepler-186f is significantly smaller. Now we can point to a star and say, 'There lies an Earth-like planet.'""

Pollution In China Could Be Driving Freak Weather In US 158

Posted by Unknown Lamer
from the blame-canada dept.
Hugh Pickens DOT Com (2995471) writes "Jonathan Kaiman reports at The Guardian that China's air pollution could be intensifying storms over the Pacific Ocean and altering weather patterns in North America leading to more ... warm air in the mid-Pacific moving towards the north pole. 'Mid-latitude storms develop off Asia and they track across the Pacific, coming in to the west coast of the U.S.,' says Ellie Highwood, a climate physicist at the University of Reading. 'The particles in this model are affecting how strong those storms are, how dense the clouds are, and how much rainfall comes out of those storms.' Fossil fuel burning and petrochemical processing in Asia's rapidly developing economies lead to a build-up of aerosols, fine particles suspended in the air. Typically, aerosol formation is thought of as the antithesis to global warming: it cools our Earth's climate. But researchers say, too much of any one thing is never good. 'Aerosols provide seeds for cloud formation. If you provide too many seeds, then you fundamentally change cloud patterns and storm patterns,' says co-author Renyi Zhang. China's leaders are aware of the extent of the problem and will soon revise China's environmental protection law for the first time since 1989 ... 'The provisions on transparency are probably the most positive step forward,' says Alex Wang, expert in Chinese environmental law at UCLA. 'These include the requirement that key polluters disclose real-time pollution data.'"

Google Looked Into Space Elevator, Hoverboards, and Teleportation 98

Posted by Soulskill
from the go-big-or-go-home-on-your-hoverboard dept.
An anonymous reader writes "Google has a huge research budget and an apparent willingness to take on huge projects. They've gotten themselves into autonomous cars, fiber optic internet, robotics, and Wi-Fi balloons. But that raises a question: if they're willing to commit to projects as difficult and risk as those, what projects have they explored but rejected? Several of the scientists working at Google's 'innovation lab' have spilled the beans: '[Mag-lev] systems have a stabilizing structure that keeps trains in place as they hover and move forward in only one direction. That couldn't quite translate into an open floor plan of magnets that keep a hoverboard steadily aloft and free to move in any direction. One problem, as Piponi explains, is that magnets tend to keep shifting polarities, so your hoverboard would constantly flip over as you floated around moving from a state of repulsion to attraction with the magnets. Any skateboarder could tell you what that means: Your hoverboard would suck. ... If scaling problems are what brought hoverboards down to earth, material-science issues crashed the space elevator. The team knew the cable would have to be exceptionally strong-- "at least a hundred times stronger than the strongest steel that we have," by Piponi's calculations. He found one material that could do this: carbon nanotubes. But no one has manufactured a perfectly formed carbon nanotube strand longer than a meter. And so elevators "were put in a deep freeze," as Heinrich says, and the team decided to keep tabs on any advances in the carbon nanotube field.'"

Climate Scientist: Climate Engineering Might Be the Answer To Warming 341

Posted by samzenpus
from the warm-up-the-cloud-gun dept.
Lasrick (2629253) writes "Tom Wigley is one of the world's top climate scientists, and in this interview he explains his outspoken support for both nuclear energy and research into climate engineering. Wigley was one of the first scientists to break the taboo on public discussion of climate engineering as a possible response to global warming; in a 2006 paper in the journal Science, he proposed a combined geoengineering-mitigation strategy that would address the problem of increasing ocean acidity, as well as the problem of climate change. In this interview, he argues that renewable energy alone will not be sufficient to address the climate challenge, because it cannot be scaled up quickly and cheaply enough, and that opposition to nuclear power 'threatens humanity's ability to avoid dangerous climate change.'"

The Best Way To Watch the "Blood Moon" Tonight 146

Posted by samzenpus
from the good-omens dept.
An anonymous reader writes "People on the West Coast should be able to watch the beginning of the upcoming total lunar eclipse tonight at 10:20 pm. The entirety of the moon surface will be in Earth's shadow and start to glow red a couple hours later, a little after midnight. From the article: 'A lunar eclipse occurs when the sun, moon, and Earth align so that Earth's shadow falls across the moon's surface. Monday night's lunar eclipse is a total eclipse, which means Earth's shadow will cover the moon completely. The moon won't be blacked out by our planet's shadow. Instead, it will take on a reddish hue — anywhere from a bright copper to the brownish red of dried blood.'"

Mathematicians Use Mossberg 500 Pump-Action Shotgun To Calculate Pi 307

Posted by samzenpus
from the less-common-core-math dept.
KentuckyFC (1144503) writes "Imagine the following scenario. The end of civilization has occurred, zombies have taken over the Earth and all access to modern technology has ended. The few survivors suddenly need to know the value of pi and, being a mathematician, they turn to you. What do you do? According to a couple of Canadian mathematicians, the answer is to repeatedly fire a Mossberg 500 pump action shotgun at a square aluminum target about 20 meters away. Then imagine that the square is inscribed with an arc drawn between opposite corners that maps out a quarter circle. If the sides of the square are equal to 1, then the area of the quarter circle is pi/4. Next, count the number of pellet holes that fall inside the area of the quarter circle as well as the total number of holes. The ratio between these is an estimate of the ratio between the area of the quarter circle and the area of a square, or in other words pi/4. So multiplying this number by 4 will give you an estimate of pi. That's a process known as a Monte Carlo approximation and it is complicated by factors such as the distribution of the pellets not being random. But the mathematicians show how to handle these too. The result? According to this method, pi is 3.13, which is just 0.33 per cent off the true value. Handy if you find yourself in a post-apocalyptic world."

Pluto May Have Deep Seas and Ancient Tectonic Faults 47

Posted by samzenpus
from the mi-go-beach dept.
astroengine (1577233) writes "In July 2015 we get our first close look at the dwarf planet Pluto and its moon, Charon — a fact that has scientists hypothesizing more than ever about what we might see there. One of the latest ideas put forward is that perhaps the collision that likely formed Pluto and Charon heated the interior of Pluto enough to give it an internal liquid water ocean, which also gave the small world a short-lived plate tectonics system, like that of Earth."

There is hardly a thing in the world that some man can not make a little worse and sell a little cheaper.