posted 6 days ago on slashdot
An anonymous reader quotes a report from BBC: Amazon has seen a 50% fall in the amount of UK corporation tax it paid last year, while recording a 54% increase in turnover for the same period. This snippet of news raised eyebrows this morning when it was revealed. So what's going on? Taxes are paid on profit not turnover. It paid lower taxes because it made lower profits. Last year it made 48 million British Pounds (BP) or ~$62 million U.S. dollars (USD) in profit -- this year it made only 24 million BP or ~$31 million USD so it paid 7 million BP (~$9 million USD) tax compared to 15 million BP (~$19 million USD). What is more interesting is WHY its profits were lower. Part of the reason is the way it pays its staff. Amazon UK Services is the division which runs the fulfillment centers which process, package and post deliveries to UK customers. It employs about 16,000 of the 24,000 people Amazon have in the UK. Each full-time employee gets given at least 1,000 BP (~$1,297 USD) worth of shares every year. They can't cash them in immediately -- they have to hold them for a period of between one and three years. If Amazon's share price goes up in that time, those shares are worth more. Amazon's share price has indeed gone up over the past couple of years -- a lot. In fact, in the past two years the share price has nearly doubled, so 1,000 BP (~$1,297 USD) in shares granted in August 2015 are now worth nearly 2,000 BP (~$2,595 USD). Staff compensation goes up, compensation is an expense, expenses can be deducted from revenue -- so profits are lower and so are the taxes on those profits.

Read More...
posted 6 days ago on slashdot
Tim Stephens reports via The University of California in Santa Cruz: A new study by an international team of astronomers reveals that four Earth-sized planets orbit the nearest sun-like star, tau Ceti, which is about 12 light years away and visible to the naked eye. These planets have masses as low as 1.7 Earth mass, making them among the smallest planets ever detected around nearby sun-like stars. Two of them are super-Earths located in the habitable zone of the star, meaning they could support liquid surface water. The planets were detected by observing the wobbles in the movement of tau Ceti. This required techniques sensitive enough to detect variations in the movement of the star as small as 30 centimeters per second. The outer two planets around tau Ceti are likely to be candidate habitable worlds, although a massive debris disc around the star probably reduces their habitability due to intensive bombardment by asteroids and comets.

Read More...
posted 6 days ago on slashdot
An anonymous reader quotes a report from CNN: Fidget spinners are supposed to be calming and fun, especially for students struggling to focus. But after some dangerous incidents involving the popular gizmos, the US Consumer Product Safety Commission has issued new fidget spinner safety guidance for consumers and businesses. There have been a handful of choking incidents reported with the toys, as well as two instances of battery-operated spinners catching on fire and another incident in which a fidget spinner melted, the agency said. No deaths have been reported. The agency also issued safety guidance on battery-operated fidget spinners. Consumers should always be present when the product is charging, never charge it overnight and always use the cable it came with, the statement said. Users should unplug their spinner immediately once it's fully charged and make sure they have working smoke detectors in their home. "As the agency investigates some reported incidents associated with this popular product, fidget spinner users or potential buyers should take some precautions," Ann Marie Buerkle, acting chief of the Consumer Product Safety Commission, said in a statement. "Keep them from small children; the plastic and metal spinners can break and release small pieces that can be a choking hazard; and older children should not put fidget spinners in their mouths." Fidget spinners should be kept away from children under the age of 3, the statement said.

Read More...
posted 7 days ago on slashdot
Last month, Foxconn announced plans to build a $10 billion factory in southeastern Wisconsin in exchange for $3 billion in tax breaks. While the factory was heralded as a big win for President Trump and Governor Scott Walker, a report issued last week says the plan is looking less and less like a good deal for the state. In the report, Wisconsin's Legislative Fiscal Bureau said that the state wouldn't break even on its investment until 2043 -- and that's in an absolute best-case scenario. The Verge reports: How many workers Foxconn actually hires, and where Foxconn hires them from, would have a significant impact on when the state's investment pays off, the report says. The current analysis assumes that "all of the construction-period and ongoing jobs associated with the project would be filled by Wisconsin residents." But the report says it's likely that some positions would go to Illinois residents, because the factory would be located so close to the border. That would lower tax revenue and delay when the state breaks even. And that's still assuming that Foxconn actually creates the 13,000 jobs it claimed it might create, at the average wage -- just shy of $54,000 -- it promised to create them at. In fact, the plant is only expected to start with 3,000 jobs; the 13,000 figure is the maximum potential positions it could eventually offer. If the factory offers closer to 3,000 positions, the report notes, "the breakeven point would be well past 2044-45."

Read More...
posted 7 days ago on slashdot
schwit1 shares a report from The Sun: Researchers at a Chinese university have revealed the results of an investigation aimed at creating a "repression network" which can identify cars from "customized paintings, decorations or even scratches" rather than by scanning its number plate. A team from Peking University said the technology they have developed to perform this task could also be used to recognize the faces of human beings. Essentially, it works by learning from what it sees, allowing it to differentiate between cars (or humans) by spotting small differences between them. "The growing explosion in the use of surveillance cameras in public security highlights the importance of vehicle search from large-scale image databases," the researcher wrote. "Precise vehicle search, aiming at finding out all instances for a given query vehicle image, is a challenging task as different vehicles will look very similar to each other if they share same visual attributes." They added: "We can extend our framework [software] into wider applications like face and person retrieval [identification] as well."

Read More...
posted 7 days ago on slashdot
Orome1 shares a report from Help Net Security: Nothing should be more important for these sites and apps than the security of the users who keep them in business. Unfortunately, Dashlane found that that 46% of consumer sites, including Dropbox, Netflix, and Pandora, and 36% of enterprise sites, including DocuSign and Amazon Web Services, failed to implement the most basic password security requirements. The most popular sites provide the least guidance when it comes to secure password policies. Of the 17 consumer sites that failed Dashlane's tests, eight are entertainment/social media sites, and five are e-commerce. Most troubling? Researchers created passwords using nothing but the lowercase letter "a" on Amazon, Google, Instagram, LinkedIn, Venmo, and Dropbox, among others. GoDaddy emerged as the only consumer website with a perfect score, while enterprise sites Stripe and QuickBooks also garnered a perfect score of 5/5. Here's a screenshot of how each consumer/enterprise website performed.

Read More...
posted 7 days ago on slashdot
NBC News originally reported: Google employees will gather for a town hall meeting Thursday afternoon to discuss the tensions ignited by a memo circulated inside the company that claimed to explain why more women are not engineers. Town hall meetings are nothing new at Google, but this one will likely be different after the so-called "Google Manifesto" went viral over the weekend, adding fresh fuel to the debate around gender bias in Silicon Valley. Google CEO Sundar Pichai told employees in an email earlier this week that he would cut his family vacation short in order to facilitate the forum. "The past few days have been very difficult for many at the company, and we need to find a way to debate issues on which we might disagree -- while doing so in line with our Code of Conduct," he wrote. "I'd encourage each of you to make an effort over the coming days to reach out to those who might have different perspectives from your own. I will be doing the same." The town hall comes amid a report from The Guardian that as many as 60 women are considering filing a class action lawsuit against Google, alleging sexism and wage disparity. UPDATE: NBC News now reports the event has been cancelled, with Google CEO Sundar Pichai saying "Googlers are writing in, concerned about their safety and worried they may be 'outed' publicly for asking a question in the Town Hall... we need to step back and create a better set of conditions for us to have the discussion." Instead of the company-wide format, Google will now hold several smaller forums "to gather and engage with Googlers, where people can feel comfortable to speak freely," Pichai wrote.

Read More...
posted 7 days ago on slashdot
According to Reuters, Amazon is seeking to partner with U.S. venue owners to sell event tickets -- a move that could loosen Ticketmaster's powerful grip on the lucrative ticketing business. From the report: The Seattle-based company sees the U.S. ticketing market as ripe for attack. Consumers dislike ticket fees, and venue owners, sports leagues and teams want more distributors for their tickets as they seek to boost sales. Access to tickets could be another means to lure members to the Amazon Prime shopping club. For music acts and sports teams, selling tickets through Amazon could help sell their merchandise. Currently Ticketmaster, owned by Live Nation Entertainment, is the exclusive seller of primary tickets for many top venues in the United States. Would-be challengers have struggled to compete in the face of Ticketmaster's strong relationships with the operators of major U.S. sports stadiums, arenas, concert halls and other venues. Amazon has had success with ticketing in Britain, where it has been selling seats to West End shows since 2015, even outselling Ticketmaster for some events, according to one of the sources, who owns venues in that country. It is less common for venues in Britain to have an exclusive ticket provider.

Read More...
posted 7 days ago on slashdot
Archeron writes: It seems that scientists at University of Washington in Seattle have managed to encode malware into genomic data, allowing them to gain full access to a computer being used to analyze the data. While this may be a highly contrived attack scenario, it does ask the question whether we pay sufficient attention to data-driven exploits, especially where the data is instrument-derived. What other systems could be vulnerable to a tampered raw data source? Perhaps audio and RF analysis systems? MIT Technology Review reports: "To carry out the hack, researchers led by Tadayoshi Kohno and Luis Ceze encoded malicious software in a short stretch of DNA they purchased online. They then used it to gain 'full control' over a computer that tried to process the genetic data after it was read by a DNA sequencing machine. The researchers warn that hackers could one day use faked blood or spit samples to gain access to university computers, steal information from police forensics labs, or infect genome files shared by scientists. To make the malware, the team translated a simple computer command into a short stretch of 176 DNA letters, denoted as A, G, C, and T. After ordering copies of the DNA from a vendor for $89, they fed the strands to a sequencing machine, which read off the gene letters, storing them as binary digits, 0s and 1s. Yaniv Erlich, a geneticist and programmer who is chief scientific officer of MyHertige.com, a genealogy website, says the attack took advantage of a spill-over effect, when data that exceeds a storage buffer can be interpreted as a computer command. In this case, the command contacted a server controlled by Kohno's team, from which they took control of a computer in their lab they were using to analyze the DNA file." You can read their paper here.

Read More...
posted 7 days ago on slashdot
An anonymous reader quotes a report from Reuters: Tesla is developing a long-haul, electric semi-truck that can drive itself and move in "platoons" that automatically follow a lead vehicle, and is getting closer to testing a prototype, according to an email discussion of potential road tests between the car company and the Nevada Department of Motor Vehicles (DMV), seen by Reuters. The correspondence and meeting show that Tesla is putting self-driving technology into the electric truck it has said it plans to unveil in September, and is advancing toward real-life tests, potentially moving it forward in a highly competitive area of commercial transport also being pursued by Uber Technologies Inc [UBER.UL] and Alphabet Inc's Waymo. After announcing intentions a year ago to produce a heavy-duty electric truck, Musk tweeted in April that the semi-truck would be revealed in September, and repeated that commitment at the company's annual shareholder meeting in June, but he has never mentioned any autonomous-driving capabilities. An email exchange in May and June between Tesla and Nevada DMV representatives included an agenda for a June 16 meeting, along with the Nevada Department of Transportation, to discuss testing of two prototype trucks in Nevada, according to the exchange seen by Reuters.

Read More...
posted 7 days ago on slashdot
China recently launched a crackdown on the use of software which allows users to get around its heavy internet censorship. Now as the BBC reports, developers are facing growing pressure. From the report: The three plain-clothes policemen tracked him down using a web address. They came to his house and demanded to see his computer. They told him to take down the app he was selling on Apple's App Store, and filmed it as it was happening. His crime was to develop and sell a piece of software that allows people to get round the tough restrictions that limit access to the internet in China. A virtual private network (VPN) uses servers abroad to provide a secure link to the internet. It's essential in China if you want to access parts of the outside world like Facebook, Gmail or YouTube, all of which are blocked on the mainland. "They insisted they needed to see my computer," the software developer, who didn't want us to use his name, told us during a phone interview. "I said this is my private stuff. How can you search as you please?" No warrant was produced and when he asked them what law he had violated they didn't say. Initially he refused to co-operate but, fearing detention, he relented. Then they told him what they wanted: "If you take the app off the shelf from Apple's App Store then this will be all over." 'Sorry, I can't help you with that'. Up until a few months ago his was a legal business. Then the government changed the regulations. VPN sellers need a licence now.

Read More...
posted 7 days ago on slashdot
Dan Primack, reporting for Axios: The battle between Benchmark Capital and Travis Kalanick just went nuclear, with the venture capital firm suing the former Uber CEO for fraud, breach of contract and breach of fiduciary duty. The complaint was filed earlier today in Delaware Chancery Court. Key graph, per the suit: "Kalanick, the former CEO of Uber, to entrench himself on Uber's Board of Directors and increase his power over Uber for his own selfish ends. Kalanick's overarching objective is to pack Uber's Board with loyal allies in an effort to insulate his prior conduct from scrutiny and clear the path for his eventual return as CEO -- all to the detriment of Uber's stockholders, employees, driver-partners, and customers." Why it matters: If Benchmark's suit is successful, Kalanick would be kicked off Uber's board of directors -- thus eliminating any faint hopes of him returning to the company in a substantial role.

Read More...
posted 7 days ago on slashdot
Josh Schwartz, Salesforce's director of offensive security, and John Cramb, a senior offensive security engineer, have been fired by the company after they gave talk at the Defcon security conference talk in Las Vegas last month, reports ZDNet. Schwartz and Cramb were presenting the details of their tool, called Meatpistol, a "modular malware implant framework (PDF)" similar in intent to the Metasploit toolkit used by many penetration testers. The tool, "pitched as taking 'the boring work' out of pen-testing to make red teams, including at Salesforce, more efficient and effective", was anticipated to be released as open source at the time of the presentation, but Salesforce has held back the code. From the report: [...] The two were fired "as soon as they got off stage" by a senior Salesforce executive, according to one of several people who witnessed the firing and offered their accounts. The unnamed Salesforce executive is said to have sent a text message to the duo half an hour before they were expected on stage to not to give the talk, but the message wasn't seen until after the talk had ended. The talk had been months in the making. Salesforce executives were first made aware of the project in a February meeting, and they had signed off on the project, according to one person with knowledge of the meeting. The tool was expected to be released later as an open-source project, allowing other red teams to use the project in their own companies. But in another text message seen by Schwartz and Cramb an hour before their talk, the same Salesforce executive told the speakers that they should not announce the public release of the code, despite a publicized and widely anticipated release. Later, on stage, Schwartz told attendees that he would fight to get the tool published.

Read More...
posted 7 days ago on slashdot
An anonymous reader shares a Bloomberg report, in which the recently fired employee has been interviewed: James Damore, who until Monday worked as an engineer on video and image search at Alphabet's Mountain View, California, headquarters, said he initially shared the 3,300-word memo internally a month ago. But it was only after the memo went viral that company leaders banded together to make him an outcast, he said on Bloomberg TV. When he initially circulated the memo, "no one high up ever came to me and said, 'No, don't do this,' even though there were many people who looked at it," Damore said. "It was only after it got viral that upper management started shaming me and eventually firing me." The memo, which was leaked to the public over the weekend, argues that conservative viewpoints are suppressed at Google and that biological differences between men and women explain in part why so few women work in software engineering. Even if someone in Google management had agreed with some of the arguments put forth in his piece, they wouldn't have felt safe speaking up, he said. "There was a concerted effort among upper management to have a very clear signal that what I did was harmful and wrong and didn't stand for Google," Damore said. "It would be career suicide for any executives or directors to support me."

Read More...
posted 7 days ago on slashdot
Ann-Derrick Gaillot, a writer at The Outline, shares thoughts on listicles about best products in a genre. From the article: National websites with armies of writers are churning out best lists left and right, motivated by affiliate advertising more than the desire to share an opinion. Thanks to them all, I've gotten to try all the bests: just-ok restaurants, ineffective beauty products, slippers I guard with my life. [...] Articles claiming that something is the "best" should be rare, eyed with suspicion by the ever suspicious consumer. But they're not. I would have probably been alarmed to not find at least one article telling me where to find the best desk (wherever it still is). But with the race to find the best at the heart of so much media we consume today, such articles can only be trusted if they come from an established outlet with legitimacy, the same institutions that are slow and struggle to add marginalized people to their ranks.

Read More...
posted 7 days ago on slashdot
An anonymous reader shares a report: Despite being relatively easy, Apple keeps ignoring requests to enable a feature called Advanced Mobile Location (AML) in iOS. Enabling AML would give emergency services extremely accurate locations of emergency calls made from iPhones, dramatically decreasing response time. As we have covered before, Google's successful implementation of AML for Android is already saving lives. But where Android users have become safer, iPhone owners have been left behind. The European Emergency Number Association (EENA), the organization behind implementing AML for emergency services, released a statement today that pleads Apple to consider the safety of its customers and participate in the program: "As AML is being deployed in more and more countries, iPhone users are put at a disadvantage compared to Android users in the scenario that matters most: An emergency. EENA calls on Apple to integrate Advanced Mobile Location in their smartphones for the safety of their customers." Why is AML so important? Majority of emergency calls today are made from cellphones, which has made location pinging increasingly more important for emergency services. There are many emergency apps and features in development, but AML's strength is that it doesn't require anything from the user -- no downloads and no forethought: The process is completely automated. With AML, smartphones running supporting operating systems will recognize when emergency calls are being made and turn on GNSS (global navigation satellite system) and Wi-Fi. The phone then automatically sends an SMS to emergency services, detailing the location of the caller. AML is up to 4,000 times more accurate than the current systems -- pinpointing phones down from an entire city to a room in an apartment. "In the past months, EENA has been travelling around Europe to raise awareness of AML in as many countries as possible. All these meetings brought up a recurring question that EENA had to reply to: 'So, what about Apple?'" reads EENA's statement.

Read More...
posted 7 days ago on slashdot
An anonymous reader shares a report: Airlines -- an industry not known for stellar customer interactions -- are joining the party, and not just to break the bad news about your flight. They're inviting you to ask questions, and maybe even complain. Two airlines have dipped their wings into the waters of two-way texting. Hawaiian Holdings's Hawaiian Airlines is adding the feature while JetBlue Airways took a stake in a software startup that will allow its call center staff to start texting customers in the coming months. Texting, technically called SMS (which stands for short message service), is arguably the world's most favored form of communication, but much of corporate America has been slow to adapt. The few that have -- including Verizon Wireless retailers, British telecom company Sky UK, and Nestle SA's frozen foods division -- are dwarfed by an array of local commerce, from insurance agents, veterinarians, air conditioning techs, and auto dealers who have already jumped in to conduct their business.

Read More...
posted 7 days ago on slashdot
From a report: Facebook's push toward original video content will take a big step forward Thursday with the launch of a new section, dubbed Watch. The new tab, which Facebook FB, said late Wednesday will launch for a limited number of U.S. users for now, will feature about 40 original series, with plans to eventually scale up to hundreds of shows. Facebook said it will become available to more users in the coming weeks. The Mountain View, Calif., social network is hoping to tap into lucrative TV advertising revenue to boost its ever-expanding bottom line. If successful, Watch could stem the ad-load slowdown for the rest of the year that Chief Financial Officer David Wehner warned about last month when Facebook filed its quarterly earnings. Facebook also hopes the Watch tab will open up a new method of advertising that doesn't clutter users' News Feeds, and keep its 2 billion users on its site longer. Company's founder Mark Zuckerberg is understandably very excited about the move. He says the company believes "it's possible to rethink a lot of experiences through the lens of building community -- including watching video. Watching a show doesn't have to be passive. It can be a chance to share an experience and bring people together who care about the same things." If that pitch sounds familiar to you, it's because TV has been doing it for more than 75 years.

Read More...
posted 7 days ago on slashdot
Reader MojoKid writes: AMD continues its attack on the desktop CPU market versus Intel today, with the official launch of the company's Ryzen Threadripper processors. Threadripper is AMD's high-end, many-core desktop processor, that leverages the same Zen microarchitecture that debuted with Ryzen 7. The top-end Ryzen Threadripper 1950X is a multi-chip module featuring 16 processor cores (two discrete die), with support for 32 threads. The base frequency for the 1950X is 3.4GHz, with all-core boost clocks of up to 3.7GHz. Four of the cores will regularly boost up to 4GHz, however, and power and temperature permitting, those four cores will reach 4.2GHz when XFR kicks in. The 12-core Threadripper 1920X has very similar clocks and its boost and XFR frequencies are exactly the same. The Threadripper 1920X's base-clock, however, is 100MHz higher than its big brother, at 3.5GHz. In a litany of benchmarks with multi-threaded workloads, Threadripper 1950X and 1920X high core-counts, in addition to strong SMT scaling, result in the best multi-threaded scores seen from any single CPU to date. Threadripper also offers massive amounts of memory bandwidth and more IO than other Intel processors. Though absolute power consumption is somewhat high, Threadrippers are significantly more efficient than AMD's previous-generation processors. In lightly-threaded workloads, Threadripper trails Intel's latest Skylake-X CPUs, however, which translates to lower performance in applications and games that can't leverage all of Threadripper's additional compute resources. Threadripper 1950X and 1920X processors are available starting today at $999 and $799, respectively. On a per-core basis, they're less expensive than Intel Skylake-X and very competitively priced.

Read More...
posted 7 days ago on slashdot
The breakage rate for Microsoft's Surface devices is significantly worse than for other manufacturers' laptops and tablets, Consumer Reports said, adding that it was removing its "recommended" designation for Surface products. From a report: The consumer advocacy group said Thursday that it can no longer recommend Microsoft laptops or tablets because of poor reliability compared to other brands. Microsoft said the findings don't accurately reflect Surface owners' "true experiences." The consumer group says Microsoft machines have performed well in laboratory testing. But a subscriber survey found start-up and freezing problems. The devices losing their "recommended" status are the Surface Laptop (128GB and 256GB versions) and Surface Book (128GB and 512GB versions).

Read More...
posted 7 days ago on slashdot
The breakage rate for Microsoft's Surface devices is significantly worse than for other manufacturers' laptops and tablets, Consumer Reports said, adding that it was removing its "recommended" designation for Surface products. From a report: The consumer advocacy group said Thursday that it can no longer recommend Microsoft laptops or tablets because of poor reliability compared to other brands. Microsoft said the findings don't accurately reflect Surface owners' "true experiences." The consumer group says Microsoft machines have performed well in laboratory testing. But a subscriber survey found start-up and freezing problems. The devices losing their "recommended" status are the Surface Laptop (128GB and 256GB versions) and Surface Book (128GB and 512GB versions).

Read More...
posted 7 days ago on slashdot
Security firm Kaspersky said Thursday it was withdrawing its European antitrust complaint against Microsoft after the software giant promised to make changes to the upcoming Windows 10 Fall Creators Update that have appeased Kaspersky and help its anti-virus software provide notifications and alerts to renew virus definitions. From a report: Kaspersky originally filed its complaint back in June, claiming that Microsoft disabled its anti-virus software during Windows upgrades and that the software maker was using its dominance to "fiercely promote" its own Windows Defender software. Microsoft admitted in late June that Windows 10 prompts to install a new version of anti-virus from third parties like Kaspersky after an update, but it disables the old version if it's not compatible. Microsoft now says it "will work more closely with AV vendors to help them with compatibility reviews in advance of each feature update becoming available to customers." The software maker will also provide better visibility of release schedules for Windows 10 updates, giving anti-virus vendors more time to test changes.

Read More...
posted 7 days ago on slashdot
An anonymous reader quotes a report from Motherboard: A leading British global investment firm has a warning for its clients: If we keep consuming oil and gas at current rates, our planet is on course to experience a rise in global average temperatures of nearly 8 Celsius (14 Fahrenheit) by the end of the century. This would make Earth basically uninhabitable for humans. Although this is the darkest scenario we've seen so far, there's reason for cautious optimism: the new projections point out that it's unlikely investors will simply ignore this risk, meaning that our present level of fossil fuel consumption could decrease. Still, by current climate research standards, this is a pretty wild number. It is four times as high as the "safe limit" for increasing temperatures caused by climate change, internationally recognized to be around 2 Celsius (3.6 Fahrenheit) above pre-industrial levels. Schroders, the British investment firm which controls assets worth $542 billion, released this forecast as part of a range of potential scenarios in its "Climate Progress Dashboard" in late July.

Read More...
posted 7 days ago on slashdot
Wave723 writes: IEEE Spectrum reports on a true random number generator that was created with single-walled semiconducting carbon nanotubes. Researchers at Northwestern University printed a SRAM cell with special nanotube ink, and used it to generate random bits based on thermal noise. This method could be used to improve the security of flexible or printed electronics. From the report: "Once Mark Hersam, an expert in nanomaterials at Northwestern University, and his team had printed their SRAM cell, they needed to actually generate a string of random bits with it. To do this, they exploited a pair of inverters found in every SRAM cell. During normal functioning, the job of an inverter is to flip any input it is given to be the opposite, so from 0 to 1, or from 1 to 0. Typically, two inverters are lined up so the results of the first inverter are fed into the second. So, if the first inverter flips a 0 into a 1, the second inverter would take that result and flip it back into a 0. To manipulate this process, Hersam's group shut off power to the inverters and applied external voltages to force the inverters to both record 1s. Then, as soon as the SRAM cell was powered again and the external voltages were turned off, one inverter randomly switched its digit to be opposite its twin again. 'In other words, we put [the inverter] in a state where it's going to want to flip to either a 1 or 0,' Hersam says. Under these conditions, Hersam's group had no control over the actual nature of this switch, such as which inverter would flip, and whether that inverter would represent a 1 or a 0 when it did. Those factors hinged on a phenomenon thought to be truly random -- fluctuations in thermal noise, which is a type of atomic jitter intrinsic to circuits." Hersam and his team recently described their work in the journal Nano Letters.

Read More...
posted 7 days ago on slashdot
While the moon has no global magnetic field nowadays, it did have one in the past and researchers believe it lasted at least a billion years longer than previously thought. The Guardian reports: Between 4.25 billion and 3.56 billion years ago, the lunar magnetic field was similar to that of the Earth. The field is thought to have been generated by the churning movement of fluids within the moon's molten core -- a sort of lunar dynamo. But scientists have long puzzled over when the magnetic field disappeared, with previous research unable to tell whether the field had disappeared completely by 3.19 billion years ago or had lingered on in a weaker form. Writing in the journal Science Advances, Sonia Tikoo, a planetary scientist and co-author of the research from Rutgers University, and colleagues from the University of California, Berkeley and Massachusetts Institute of Technology, describe how they set about unpicking the conundrum by analyzing a lunar rock brought back by the Apollo 15 mission in 1971. The sample contains fragments of basalt that had broken off larger rocks. According to a dating technique based on the ratio of different isotopes of argon, the basalt formed from lava flows about 3.3 billion years ago. These fragments are bound together in the sample by a glassy material, which the team say probably formed when some of the basalt melted following a meteorite impact. The researchers dated the formation of the glassy material to between 1 billion and 2.5 billion years ago. Crucially, the impact also melted iron-containing grains within the basalt. These crystalized again within the glassy material as it quickly cooled, capturing a record of the magnetic field of the moon at that time.

Read More...