The conditions deep inside large planets, such as Jupiter, Uranus and other planets recently discovered outside our solar system, have been experimentally recreated. This allows researchers to re-create and accurately measure material properties that control how these planets evolve over time (information that is essential for understanding how these massive objects form).
Using the largest laser in the world, the National Ignition Facility at Lawrence Livermore National Laboratory, teams from the Laboratory, University of California, Berkeley and Princeton University squeezed samples to 50 million times Earth's atmospheric pressure, which is comparable to the pressures at the center of Jupiter and Saturn. Of the 192 lasers at NIF, the team used 176 with exquisitely shaped energy versus time to produce a pressure wave that compressed the material for a short period of time. The sample -- diamond -- is vaporized in less than 10 billionths of a second.
Though diamond is the least compressible material known, the researchers were able to compress it to an unprecedented density greater than lead at ambient conditions.
"The experimental techniques developed here provide a new capability to experimentally reproduce pressure-temperature conditions deep in planetary interiors," said Ray Smith, LLNL physicist and lead author of the paper. Such pressures have been reached before, but only with shock waves that also create high temperatures -- hundreds of thousands of degrees or more -- that are not realistic for planetary interiors. The technical challenge was keeping temperatures low enough to be relevant to planets. The problem is similar to moving a plow slowly enough to push sand forward without building it up in height. This was accomplished by carefully tuning the rate at which the laser intensity changes with time.
"This new ability to explore matter at atomic scale pressures, where extrapolations of earlier shock and static data become unreliable, provides new constraints for dense matter theories and planet evolution models," said Rip Collins, another Lawrence Livermore physicist on the team.
by Anonymous Coward in security on 2014-07-22 21:09 (#625)
The Tails Linux distro gained a lot of publicity when Edward Snowden noted it as his operating system of choice. But while TAILS goes to great pains to ensure maximum anonymity when using online services, it is not impenetrable. In fact, the software's design is seriously flawed, says Loc Nguyen, a researcher at Exodus.
Tails is comprised of numerous components working in interchange," he said. ... however because there are numerous inter-locking mechanisms in play on the system, it's difficult to readily pinpoint a particular weak area."
Nguyen and team had identified a number of zero-day vulnerabilities in the distro that have gone unaddressed and remain open even as TAILS releases an update to the software. Exodus said it would release details about the zero-days in a series of blog posts next week. For the Tails platform, privacy is contingent on maintaining anonymity and ensuring their actions and communications are not attributable. Thus, any violation of those foundational pillars should be considering highly critical," added Nguyen. This affects every user of Tails, who should all "diversify security platforms so as not to put all your eggs in one basket", he added. Exodus sells to private and public businesses hoping to use the findings for either offensive or defensive means. Those unconcerned about governments targeting their systems might not be concerned about the Tails zero-days. Others will likely be anxious one of their trusted tools to avoid government hackers contains vulnerabilities that could be exploited to spy on any user of the OS."
More on the vulnerabilities at the Register
Yes, Android is based on the Linux kernel, but until the Linux and Android platforms and application ecosystems have been separate things. MicroXwin hopes to change that with a new Linux distro called VolksPC that runs both Debian and Android apps in fully native mode
“We created a unified distribution that allows both Android and Debian LXDE/XFCE applications to run simultaneously at native speeds. On ARM, our distribution is based on a modified ARMHF Debian Wheezy rootfs”, the developers write. As Phoronix reports, the developers claim that apps under both environments run “at native speeds”; the only changes to Android are in startup scripts, providing full compatibility with existing applications; and MicroXwin provides a high-speed X-Windows framework for the system.
The distro hopes to provide the best of both worlds, and a Linux desktop environment with full support for the entire Debian app repository while providing Android's simplicity and ease of use where things like HD video are concerned.
Serious gamers look to dedicated hardware and serious firepower for their gaming experience, but the casual gamer turns to the web, and probably has to start by downloading and installing a plug-in first. That turns a lot of gamers off, and Mozilla hopes to do something about it
. Says TechCrunch:
That game is Dungeon Defenders Eternity
, playable on the desktop via Steam, or on the web at playverse.com
. A mix of tower defense and role playing styles, looks like a a fun game first, but a good test of a new technology as well. Mozilla's ASM.js may not be revolutionary, but it does stand a chance at improving the ease with which the casual gamer can simply start up a game on the web without needing to worry about downloading and installing a plug-in.
The downing of Malaysia Airline MH17 in the Ukraine is turning out to be one of the biggest of tragedies of 2014 and we don't have all the answers yet. Here is a look at some of the technologies being used to unravel the mystery
. From infrared to satellite imagery to chemical signatures, it's all being used to get answers. And don't rule out human technology either: eyewitnesses make the list of forensic strategies as well.
The most important element in instilling similar certainty among European partners will probably be infrared satellite imagery. The National Reconnaissance Office, or NRO, and the Air Force Space Command operate a number of infrared satellites, such as the Space Based Infrared System (SBIRS). There are currently two SBIRS satellites in orbit but there will be six by 2022, with Lockheed Martin as developer, under control of Air Force Space Command.
Courtesy of the National Journal
A study on plants using data from over 1000 forests has found that the size and age of the plant has more of an impact on their productivity than temperature and precipitation
"A fundamental assumption of our models for understanding how climate influences the functioning of ecosystems is that temperature and precipitation directly influence how fast plants can take up and use carbon dioxide," said Enquist, a professor in the UA's Department of Ecology and Evolutionary Biology whose research lab led the study.The abstract is available here.
"Essentially, warm and wet environments are thought to allow plant metabolism to run fast, while cold and drier environments slow down metabolism and hence lower biomass production in ecosystems," he said. "This assumption makes sense, as we know from countless experiments that temperature and water control how fast plants can grow. However, when applied to a the scale of entire ecosystems, this assumption appears to not be correct."
To test the assumption on the scale of ecosystems, the team developed a new mathematical theory that assesses the relative importance of several hypothesized drivers of net primary productivity. That theory was then evaluated using a massive new dataset assembled from more than 1,000 different forest locations across the world.
The analysis revealed a new and general mathematical relationship that governs worldwide variation in terrestrial ecosystem net primary productivity. The team found that plant size and plant age control most of the variation in plant productivity, not temperature and precipitation as traditionally thought.
Since 2006, three bowling ball-size free-flying Synchronized Position Hold, Engage, Reorient, Experimental Satellites (SPHERES) have been floating around the International Space Station. Now, they are attaching a smartphone to the spheres
, making them "Smart SPHERES", a more "intelligent" free-flying robot with built-in cameras to take pictures and video, sensors to help conduct inspections, powerful computing units to make calculations and Wi-Fi connections to transfer data in real time to the computers aboard the space station and at mission control in Houston.
In a two-phase experiment, astronauts will manually use the smartphones to collect visual data using the integrated custom 3-D sensor to generate a full 3-D model of their environment. After the map and its coordinate system are developed, a second activity will involve the smartphones attached to the SPHERES, becoming the free-flying Smart SPHERES. As the free-flying robots move around the space station from waypoint to waypoint, utilizing the 3-D map, they will provide situational awareness to crewmembers inside the station and flight controllers in mission control. These experiments allow NASA to test vision-based navigation in a very small mobile product.
"NASA uses robots for research and mission operations; just think about the rovers on Mars or the robotic arm on the ISS or space shuttle," said Chris Provencher, manager of the Smart SPHERES project. "Inside the ISS space is limited, so it's really exciting to see technology has advanced enough for us to demonstrate the use of small, mobile robots to enhance future exploration missions."
Ultimately it is the hope of researchers that these devices will perform housekeeping-type tasks, such as video surveys for safety and configuration audits, noise level measurements, air flow measurements, and air quality measurements, that will offset work the astronauts currently perform.
It's old news, but it's only being reported today: turns out, in 2010, Russian crackers exploited a zero-day vulnerability to install some malware on the Nasdaq stock exchange systems capable of derailing the stock exchange.
The October alert prompted the involvement of the National Security Agency, and just into 2011, the NSA concluded there was a significant danger. ... [The] National Cybersecurity and Communications Integration Center (NCCIC), whose mission is to spot and coordinate the government’s response to digital attacks on the U.S. ... reviewed the FBI data and additional information from the NSA, and quickly concluded they needed to escalate. Thus began a frenzied five-month investigation that would test the cyber-response capabilities of the U.S. and directly involve the president. Intelligence and law enforcement agencies, under pressure to decipher a complex hack, struggled to provide an even moderately clear picture to policymakers. After months of work, there were still basic disagreements in different parts of government over who was behind the incident and why.Bloomberg Businessweek does an excellent job of telling the story of competing security agencies, their different mandates, and how they cooperated and sometimes competed to deal with the intrusion.
The agents found little evidence of a broader attack. What they did find were systematic security failures riddling some of the most important U.S. financial institutions. It turned out that many on the list were vulnerable to the same attack that struck Nasdaq. They were spared only because the hackers hadn’t bothered to try.
, the Jetsons, I, Robot
: our fascination with a future world where robots serve (and sometimes kill) us continues unabated. But while most of us are just idly daydreaming what that world of automated companions would look like, or working on purpose-built robotics like Big Dog
, Japan is aggressively pushing the envelope on robotics research. In fact, by most accounts, they've got us squarely in the Uncanny Valley
, that awkward emotional malaise you feel when interacting with a robotic being that is almost, but not quite
human.CNN has published an interesting overview of the Robot Revolution
. And it's pretty amazing. Start with the world's first virtual pop star,
or Pepper, the first humanoid robot programmed with emotion
. Freaky? Then check out Miraikan
[Japanese], Japan's National Museum of Emerging Science and Innovation, where a lot of the magic is happening.
Here, visitors can interact with ASIMO, the Honda-developed android that can run, perform tasks, and interact with people. Honda first unveiled ASIMO a decade ago, and even today it remains a futuristic vision of what robotics may one day hope to achieve on a consumer scale. ... There's Otonaroid, who looks like a young Japanese woman with silicone skin, flowing hair, and blinking eyes. ... And then there's Kodomoroid, an android newscaster that reads headlines to museum visitors, and Telenoid, a creepy-looking communication device that allows you to "speak" to friends or loved ones who are far away -- and feel as if you are sitting with them. You can hold and hug the Telenoid, and it hugs you back with its little stubs for arms.
Curious to see what the future looks like? Now's your chance.1
[Ed. note: This
time, the "Robot Revolution" refers to spectacular advances in the science of designing and building robots. Next
time though, it's going to mean we all hide in the hill caves before the Killer Robots overthrow and enslave us ...]
It seems popular opinion is relatively settled that breathing second-hand smoke is unhealthy, and that non-smokers who are exposed to it are at risk of illness. But the scientific evidence keeps piling up to support that theory, and even to extend the risks to another level: Third-hand Smoke!Research into "third hand" smoke
(residual tobacco smoke gases and particles that are deposited to surfaces and dust) has highlighted the potential cancer risk in non-smokers of non-dietary ingestion and dermal exposure to carcinogen N-nitrosamines and tobacco-specific nitrosamines (TSNAs) [Abstract
Using a highly sensitive and selective analytical approach we have determined the presence of nicotine, eight N-nitrosamines and five tobacco-specific nitrosamines in forty-six settled dust samples from homes occupied by both smokers and non-smokers. Using observations of house dust composition, we have estimated the cancer risk by applying the most recent official toxicological information. Calculated cancer risks through exposure to the observed levels of TSNAs at an early life stage (1 to 6 years old) exceeded the upper-bound risk recommended by the USEPA in 77% of smokers' and 64% of non-smokers' homes.
[Ed. note: apparently, not only should you not stand next to someone smoking, but you shouldn't even walk through a place where someone has smoked, ever. Cancel my next trip to Paris, please.]