By EditorDavid from Slashdot's greenhouse-gas-guzzlers department
An anonymous reader quotes Caltech's announcement about the results of a study funded by NASA and the Department of Energy:
During the early 2000s, environmental scientists studying methane emissions noticed something unexpected: the global concentrations of atmospheric methane -- which had increased for decades, driven by methane emissions from fossil fuels and agriculture -- inexplicably leveled off. The methane levels remained stable for a few years, then started rising again in 2007... New modeling by researchers at Caltech and Harvard University suggests that methane emissions might not have increased dramatically in 2007 after all. Instead, the most likely explanation has less to do with methane emissions and more to do with changes in the availability of the hydroxyl radical, which breaks down methane in the atmosphere... If global levels of hydroxyl decrease, global methane concentrations will increase -- even if methane emissions remain constant, the researchers say...
Tracking decadal trends in both methane and hydroxyl, Christian Frankenberg and his colleagues noted that fluctuations in hydroxyl concentrations correlated strongly with fluctuations in methane... "Think of the atmosphere like a kitchen sink with the faucet running," Frankenberg explains. "When the water level inside the sink rises, that can mean that you've opened up the faucet more. Or it can mean that the drain is blocking up. You have to look at both."
So what's changing the level of hydroxl in the atmosphere? The researchers say they have no idea.Read Replies (0)
By EditorDavid from Slashdot's teaching-technologies department
I'm guessing Slashdot's readers have their own opinions about this, so share your educational experiences in the comments. What was your first programming language?Read Replies (0)
By EditorDavid from Slashdot's universal-access-to-all-knowledge department
Archive.org argues robots.txt files are geared toward search engines, and now plans instead to represent the web "as it really was, and is, from a user's perspective."
We have also seen an upsurge of the use of robots.txt files to remove entire domains from search engines when they transition from a live web site into a parked domain, which has historically also removed the entire domain from view in the Wayback Machine... We receive inquiries and complaints on these "disappeared" sites almost daily."
In response, Slashdot reader Lauren Weinstein writes:
We can stipulate at the outset that the venerable Internet Archive and its associated systems like Wayback Machine have done a lot of good for many years -- for example by providing chronological archives of websites who have chosen to participate in their efforts. But now, it appears that the Internet Archive has joined the dark side of the Internet, by announcing that they will no longer honor the access control requests of any websites.
He's wondering what will happen when "a flood of other players decide that they must emulate the Internet Archive's dismal reasoning to remain competitive," adding that if sys-admins start blocking spiders with web server configuration directives, other unrelated sites could become "collateral damage." But BoingBoing is calling it "an excellent decision... a splendid reminder that nothing published on the web is ever meaningfully private, and will always go on your permanent record." So what do Slashdot's readers think? Should Archive.org ignore robots.txt directives and cache everything?Read Replies (0)
By EditorDavid from Slashdot's being-what's-next department
An anonymous reader writes:
Microsoft is still encouraging businesses to rent their Office software, according to TechRadar. "In a bid to further persuade users of the standalone versions of Office to shift over to a cloud subscription (Office 365), Microsoft has announced that those who made a one-off purchase of an Office product will no longer get access to the business flavours of OneDrive and Skype come the end of the decade." PC World explains that in reality this affects very few users. "If you've been saving all of your Excel spreadsheets into your OneDrive for Business cloud, you'll need to download and move them over to a personal subscription -- or pony up for Office 365, as Microsoft really wants you to do."
Microsoft is claiming that when customers connect to Office 365 services using a legacy version of Office, "they're not enjoying all that the service has to offer. The IT security and reliability benefits and end user experiences in the apps is limited to the features shipped at a point in time. To ensure that customers are getting the most out of their Office 365 subscription, we are updating our system requirements." And in another blog post, they're almost daring people to switch to Linux. "Providing over three years advance notice for this change to Office 365 system requirements for client connectivity gives you time to review your long-term desktop strategy, budget and plan for any change to your environment."
In a follow-up comment, Microsoft's Alistair Speirs explained that "There is still an option to get monthly desktop updates, but we are changing the 3x a year update channel to be 2x a year to align closer to Windows 10 update model. We are trying to strike the right balance between agile, ship-when-ready updates and enterprise needs of predictability, reliability and advanced notice to validate and prepare."Read Replies (0)
By EditorDavid from Slashdot's fixing-the-clouds department
MIT Technology Review reports:
David Mitchell, a lanky, soft-spoken atmospheric physicist, believes frigid clouds in the upper troposphere may offer one of our best fallback plans for combating climate change... Fleets of large drones would crisscross the upper latitudes of the globe during winter months, sprinkling the skies with tons of extremely fine dust-like materials every year. If Mitchell is right, this would produce larger ice crystals than normal, creating thinner cirrus clouds that dissipate faster. "That would allow more radiation into space, cooling the earth," Mitchell says...
Increasingly grim climate projections have convinced a growing number of scientists it's time to start conducting experiments to find out what might work. In addition, an impressive list of institutions including Harvard University, the Carnegie Council, and the University of California, Los Angeles, have recently established research initiatives... By this time next year, Harvard professors David Keith and Frank Keutsch hope to launch a high-altitude balloon from a site in Tucson, Arizona. This will mark the beginning of a research project to explore the feasibility and risks of an approach known as solar radiation management. The basic idea is that spraying materials into the stratosphere could help reflect more heat back into space, mimicking a natural cooling phenomenon that occurs after volcanoes blast tens of millions of tons of sulfur dioxide into the sky.
"I don't really know what the answer is," says a former associate director at Lawrence Livermore National Laboratory. "But I do believe we need to keep saying what the truth is, and the truth is, we might need it."Read Replies (0)
By EditorDavid from Slashdot's you've-got-first-round-seed-capital department
Long-time reader Esther Schindler writes:
Innovation occurs outside the Bay Area, New York, Boston, and Austin. So why is it so hard for a startup to get attention and acquire venture capital? Steve Case and Kara Swisher discussed this never-ending-topic recently, such as the fact 78% of U.S. venture capital last year went to just three states: California, New York, and Massachusetts. Case sees a "third wave" of venture capital funding and through his VC firm is investing in startups based outside major tech centers.
But, points out Stealthmode's Francine Hardaway, if you're in Boise or Baltimore you don't have to wait for Case to come to town. She shares advice about what's worked in other startup communities, focusing on the #YesPhx efforts.
Conventional wisdom says you should be in a major tech center to get funding, but the article offers an encouraging counterargument. "Never rely on conventional wisdom if you're an innovator. Money follows real innovation."Read Replies (0)
By EditorDavid from Slashdot's choice-is-ours department
"We have decided to close down our email business," Verizon has announced -- in a move which affects 4.5 million accounts. Slashdot reader tomservo84 writes:
Strangely enough, I didn't find out about this from Verizon, itself, but SiriusXM, who sent me an email saying that since I have a Verizon.net email address on file, I'd have to update it because they were getting rid of their email service. I thought it was a bad phishing attempt at first...
Network World reports that customers are being notified "on a rolling basis... Once customers are notified, they are presented with a personal take-action date that is 30 days from the original notification." But even after that date, verizon.net email addresses can be revived using AOL Mail. "Over the years we've realized that there are more capable email platforms out there," Verizon concedes.
"Migration is going well," a Verizon spokesperson told Network World. "I don't have any stats to share, but customers seem to appreciate that they have several choices, including an option that keeps their Verizon.net email address intact."Read Replies (0)
By EditorDavid from Slashdot's Android-in-a-Box department
Slashdot user #1083, downwa, writes:
Canonical engineer Simon Fels has publicly released an Alpha version of Anbox. Similar to the method employed for Android apps on ChromeOS, Anbox runs an entire Android system (7.1.1 at present) in an LXC container. Developed over the last year and a half, the software promises to seamlessly bring performant Android apps to the Linux desktop.
After installing Anbox (based on Android 7.1.1) and starting Anbox Application Manager, ten apps are available: Calculator, Calendar, Clock, Contacts, Email, Files, Gallery, Music, Settings, and WebView. Apps run in separate resizeable windows. Additional apps (ARM-native binaries are excluded) can be installed via adb. Installation currently is only supported on a few Linux distributions able to install snaps. Contributions are welcome on Github.
In a blog post Simon describes it as "a side project" that he's worked on for over a year and a half. "There were quite a few problems to solve on the way to a really working implementation but it is now in a state that it makes sense to share it with a wider audience."Read Replies (0)
By EditorDavid from Slashdot's obey-and-survive department
An anonymous reader quotes Bloomberg:
In the race to the autonomous revolution, developers have realized there aren't enough hours in a day to clock the real-world miles needed to teach cars how to drive themselves. Which is why Grand Theft Auto V is in the mix... Last year, scientists from Darmstadt University of Technology in Germany and Intel Labs developed a way to pull visual information from Grand Theft Auto V. Now some researchers are deriving algorithms from GTAV software that's been tweaked for use in the burgeoning self-driving sector. The latest in the franchise from publisher Rockstar Games Inc. is just about as good as reality, with 262 types of vehicles, more than 1,000 different unpredictable pedestrians and animals, 14 weather conditions and countless bridges, traffic signals, tunnels and intersections...
The idea isn't that the highways and byways of the fictional city of Los Santos would ever be a substitute for bona fide asphalt. But the game "is the richest virtual environment that we could extract data from," said Alain Kornhauser, a Princeton University professor of operations research and financial engineering who advises the Princeton Autonomous Vehicle Engineering team. Waymo uses its simulators to create a confounding motoring situation for every variation engineers can think of: having three cars changing lanes at the same time at an assortment of speeds and directions, for instance. What's learned virtually is applied physically, and problems encountered on the road are studied in simulation.Read Replies (0)
By EditorDavid from Slashdot's coding-with-coffee department
Stack Overflow data scientist David Robinson recently calculated when people visit the popular programming question-and-answer site, but then also calculated whether those results differed by programming language. Quoting his results:
And they've also calculated the technologies used most between 9 to 5 (which "include many Microsoft technologies, such as SQL Server, Excel, VBA, and Internet Explorer, as well as technologies like SVN and Oracle that are frequently used at enterprise software companies.") Meanwhile, the technologies most often used outside the 9-5 workday "include web frameworks like Firebase, Meteor, and Express, as well as graphics libraries like OpenGL and Unity. The functional language Haskell is the tag most visited outside of the workday; only half of its visits happen between 9 and 5."Read Replies (0)
By EditorDavid from Slashdot's genetic-re-engineering department
Long-time reader randomErr quotes Gizmodo:
It's a nightmare scenario straight out of a primetime drama: a child-seeking couple visits a fertility clinic to try their luck with in-vitro fertilization, only to wind up accidentally impregnated by the wrong sperm. In a fascinating legal case out of Singapore, the country's Supreme Court ruled that this situation doesn't just constitute medical malpractice. The fertility clinic, the court recently ruled, must pay the parents 30% of upkeep costs for the child for a loss of 'genetic affinity.' In other words, the clinic must pay the parents' child support not only because they made a terrible medical mistake, but because the child didn't wind up with the right genes...
"It's suggesting that the child itself has something wrong with it, genetically, and that it has monetary value attached to it," Todd Kuiken, a senior research scholar with the Genetic Engineering and Society Center at North Carolina State University, told Gizmodo. "They attached damages to the genetic makeup of the child, rather than the mistake. That's the part that makes it uncomfortable. This can take you in all sort of fucked up directions."Read Replies (0)
By EditorDavid from Slashdot's winning-through-whitespace department
There was a surprise in the latest Community Technology Preview release of SQL Server 2017. An anonymous reader quotes InfoWorld:
Python can now be used within SQL Server to perform analytics, run machine learning models, or handle most any kind of data-powered work. This integration isn't limited to enterprise editions of SQL Server 2017, either -- it'll also be available in the free-to-use Express edition... Microsoft has also made it possible to embed Python code directly in SQL Server databases by including the code as a T-SQL stored procedure. This allows Python code to be deployed in production along with the data it'll be processing. These behaviors, and the RevoScalePy package, are essentially Python versions of features Microsoft built for SQL Server back when it integrated the R language into the database...
An existing Python installation isn't required. During the setup process, SQL Server 2017 can pull down and install its own edition of CPython 3.5, the stock Python interpreter available from the Python.org website. Users can install their own Python packages as well or use Cython to generate C code from Python modules for additional speed.
Except it's not yet available for Linux users, according to the article. "Microsoft has previously announced SQL Server would be available for Linux, but right now, only the Windows version of SQL Server 2017 supports Python."Read Replies (0)
By BeauHD from Slashdot's point-A-to-point-B department
RockDoctor writes: A recent proposition to launch probes to other star systems driven by lasers which remain in the Solar system has garnered considerable attention. But recently published work suggests that there are unexpected complexities to the system. One would think that the closest star systems would be the easiest to reach. But unless you are content with a fly-by examination of the star system, with much reduced science returns, you will need to decelerate the probe at the far end, without any infrastructure to assist with the braking. By combining both light-pressure braking and gravitational slingshots, a team of German, French and Chilean astronomers discover that the brightness of the destination star can significantly increase deceleration, and thus travel time (because higher flight velocities can be used). Slingshotting around a companion star to lengthen deceleration times can help shed flight velocity to allow capture into a stable orbit. The 4.37 light year distant binary stars Alpha Centauri A and B could be reached in 75 years from Earth. Covering the 0.24 light year distance to Proxima Centauri depends on arriving at the correct relative orientations of Alpha Centauri A and B in their mutual 80 year orbit for the sling shot to work. Without a companion star, Proxima Centauri can only absorb a final leg velocity of about 1280km/s, so that leg of the trip would take an additional 46 years. Using the same performance characteristics for the light sail, the corresponding duration for an approach to the Sirius system, almost twice as far away (8.58 lightyears), is a mere 68.9 years, making it (and it's white dwarf companion) possibly a more attractive target. Of course, none of this addresses the question of how to get any data from there to here. Or, indeed, how to manage a project that will last longer than a working lifetime. There are also issues of aiming -- the motion of the Alpha Centauri system isn't well-enough known at the moment to achieve the precise maneuvering needed without course corrections (and so, data transmission from there to here) en route.Read Replies (0)