New submitter cartechboy writes "Ears perked up when Elon Musk made another bold statement he'd be 'willing to bet on.' This time he says that in 20 years, half of all new cars sold would be plug-in electric cars. Believe him? The math looks a little fuzzy, and one research analyst is willing to take Musk up on the bet. 'It expects the U.S. plug-in market to grow at a 32-percent average rate from now through 2020. That takes sales to roughly 200,000 units in 2020. Even if that rate continued for another 12 years, which Hurst considers unlikely, that would only take plug-in cars to roughly one-third of the market in 2032, or about 5 million sales. But Hurst thinks 8 or 10 percent annual growth in plug-in sales is more reasonable, taking the total to 480,000 or 574,000 plug-ins sold in 2032 in the U.S.'"

In a world increasingly dominated by the cloud, privacy is often sacrificed for convenience. Imagine a world where you could use cloud services without allowing the provider to read your data. Author of Cryptocat (a browser-based secure chat system) Nadim Kobeissi shared the problems he faced developing Cryptocat, his solutions, and future of client-side cryptography. Read on for more.

Update: 07/18 03:48 GMT by U L : Slides (PDF) from and video of the talk are now online.

DerekduPreez writes "Sellers on Amazon's retail site are increasingly using high-speed algorithmic trading tools to automatically set prices, which could lead to a malfunction similar to the 2010 flash crash. According to the Financial Times, prices on Amazon's website change as often as every 15 minutes, where sellers are using tools traditionally developed by data miners at banks to ensure that their prices are always below their rivals'. Third-party software is allowing sellers to detect a competitor's price and automatically undercut that price by, for example, £1. However, this could lead to a situation similar to the U.S. flash crash, where algorithmic trading was blamed for stock prices falling to near zero and then bouncing back within 20 minutes." At Slashdot's sister site for Business Intelligence, Nick Kolakowski has some more information on this possibility.

jones_supa writes "A Finnish PhD in mathematics, Arto Inkala, has allegedly created the world's toughest sudoku puzzle. 'There's no straightforward way to define the difficulty level of a sudoku. I myself doubt if this is the hardest in the world, but definitely harder than my previous ones,' Inkala sets off humbly. The news agencies around Europe are nonetheless excited (Google translation of Finnish original). The particular difficulty in this version lies in the number of deductions you have to make in order to fill in a single number on the grid. 'It is a common misconception that the less initial numbers, the harder the puzzle. The most challenging ones have 21-25', the creator adds."

An anonymous reader writes "The GNU C Library version 2.16 was released with many new features over the weekend. The announcement cites support for the Linux x32 ABI, ISO C11 compliance, performance improvements for math functions and some architectures, and more than 230 bug fixes."

theodp writes "'Perhaps nothing will have as large an impact on advanced analytics in the coming year as the ongoing explosion of new and powerful data sources,' writes Bill Franks in Taming The Big Data Tidal Wave. And one of the hottest new sources of Big Data, reports the WSJ's Alexandra Alter in Your E-Book Is Reading You, is the estimated 40 million e-readers and 65 million tablets in use in the U.S. that are ripe for the picking by data scientists working for Amazon, Apple, Google, and Barnes & Noble. Some privacy watchdogs argue that e-book users should be protected from having their digital reading habits recorded. 'There's a societal ideal that what you read is nobody else's business,' says the EFF's Cindy Cohn."

Freshly Exhumed writes "In a speech Wednesday, ExxonMobil CEO Rex Tillerson acknowledged that burning of fossil fuels is warming the planet, but said society will be able to adapt. The risks of oil and gas drilling are well understood and can be mitigated, he said. And dependence on other nations for oil is not a concern as long as access to supply is certain, he said. Tillerson blamed a public that is "illiterate" in science and math, a "lazy" press, and advocacy groups that "manufacture fear" for energy misconceptions in a speech at the Council on Foreign Relations."

gollum123 sends this excerpt from the NY Times: "Arguing against immigration policies that force foreign-born innovators to leave the United States, a new study (PDF) to be released on Tuesday shows that immigrants played a role in more than three out of four patents at the nation's top research universities. Conducted by the Partnership for a New American Economy, a nonprofit group co-founded by Mayor Michael Bloomberg of New York, the study notes that nearly all the patents were in science, technology, engineering and math, the so-called STEM fields that are a crucial driver of job growth. ... The Partnership for a New American Economy released a paper in May saying that other nations were aggressively courting highly skilled citizens who had settled in the United States, urging them to return to their home countries. The partnership supports legislation that would make it easier for foreign-born STEM graduates and entrepreneurs to stay in the United States. ... The study notes that nine out of 10 patents at the University of Illinois system in 2011 had at least one foreign-born inventor. Of those, 64 percent had a foreign inventor who was not yet a professor but rather a student, researcher or postdoctoral fellow, a group more likely to face immigration problems."

An anonymous reader writes "As a calculus professor for a small undergraduate institution, I normally lecture students who are majoring in the natural (or 'hard') sciences, such as mathematics, physics, and computer science. In fact, I have done so for almost thirteen years. However, for the first time this fall semester, we have a shortage of professors on our hands. As a result of this, I have been asked to teach a general education statistics class. Such classes are a major requirement for the large psychology student body we have here. I have never lectured social science students in any mathematics-related classes. My question to the Slashdot community is as follows: What are your experiences with teaching natural science classes to social science students? How is the experience the same or different in comparison to natural science students who may be more adept to the nuances of mathematics and other similar fields?"

arisvega writes "A recent publication (for the math-versed) proposing the deployment of a Solar-powered, space-borne fleet of LASER cannons that would deflect Earth-bound asteroids caught the attention of international news agencies. Do you think this ambition can in reasonable time turn into a fair-priced, life-saving (or indeed Biosphere-saving!) project, that will be to the benefit of all mankind? How threatened would you feel from the possibility of this proposed array being hijacked by extremely depraved individuals, ones capable or guilty of great crimes? And, are you not glad that now someone has published a paper on it, so Megacorp cannot 'patent' this Earth-saving idea?"

tekgoblin writes "Well this is pretty awesome, Valve has made an entrance into the education sector. They plan to release a new version of Steam for education uses in schools. Valve will call this service Steam for Schools, an education version of the Steam client that allows administrators to limit what its users can access. The idea of Steam for Schools is to use the platform as a teaching aid. Valve has already put together a number of educational lesson plans for using Portal 2 and its level editor to teach math and physics."

snoop.daub writes "R.A. Dickey, pitcher for the New York Mets, has been in the news this week after two dominant pitching performances in a row, holding opponents to one hit in each of the games for the first time since Dave Stieb did it in 1988. He has taken over as the league's only knuckleball pitcher after Tim Wakefield retired last season. But just what is it about the knuckleball that makes it hard to hit? Conventional wisdom has it that the lack of spin on the knuckleball causes it to move in completely unpredictable ways, even changing directions in mid-flight. In the last few years, there has been a lot of good science done to understand baseball pitch trajectories, and a few months ago Prof. Alan M. Nathan showed that knuckleballs aren't really so different from other pitches. It turns out that the same 9-parameter equation that can be used to describe other pitch trajectories applies just as well to the knuckleball. The difference appears to be that, like in a chaotic system, knuckleballs depend sensitively on the initial conditions, so that small changes can cause randomly different forces at the start of the pitch which determine the resultant trajectory. Much of this and similar work depends on the Pitchf/x tool, which has recorded the complete trajectory, spin angle and spin rate of every MLB pitch since 2007! Baseball really does have the best sports stats geeks."

New submitter sjdupont writes "A trio of University of South Florida (USF) engineering graduate students have decided to make a change in science, technology, engineering, and mathematics (STEM) education in an unusual and exciting way: by creating their own superhero personas and dressing in costumes as members of the Scientific League of Superheroes. Focused on elementary education, they have created a unique education program called the Superhero Training Network, a curriculum-based video series designed for the classroom which focuses on teaching STEM topics while engaging students in a fun way. Fifth grade classrooms in Hillsborough County (Florida) pilot tested the series during the 2011-2012 school year and enjoyed visits from the scientific superheroes to experience scientific demonstrations and participate in hands-on activities."

judgecorp writes "Fujitsu and partners have cracked a cryptogram which used 278-digit (923 bit) pairing-based cryptography. The technology was proposed as a next-generation standard, but Fujitsu cracked it, at this level in just over 148 days using 21 personal computers." Reader Thorfinn.au adds a snippet from Fujitsu's announcement of the break: "This was an extremely challenging problem as it required several hundred times computational power compared with the previous world record of 204 digits (676 bits). We were able to overcome this problem by making good use of various new technologies, that is, a technique optimizing parameter setting that uses computer algebra, a two dimensional search algorithm extended from the linear search, and by using our efficient programing techniques to calculate a solution of an equation from a huge number of data, as well as the parallel programming technology that maximizes computer power."

isoloisti writes "Three UK economists got access to national data on bank robberies. The conclusion is that robbing banks pays, but not very much. Average take is about $19k per person per robbery. But, there's a 20% chance of being caught per raid. To make an average income, a robber needs to do two jobs per year, and has greater than 50% chance to be in the slammer after 2 years."

ideonexus writes "Years ago Nate Silver of FiveThirtyEight.com, a blog seeking to educate the public about elections forecasting, established his model as one of the most accurate in existence, rising from a fairly unknown statistician working in baseball to one of the most respected names in election forecasting. In this article he describes all the factors that go into his predictions. A fascinating overview of the process of modeling a chaotic system."

TaeKwonDood writes "We've all seen the stories about how 'dismal' science education in America is. It turns out that it's kind of a straw man. America has long led the world in science but the 'average' score for Americans on standardized tests has never been good. Instead, every 2 years American kids get better but we keep being told things are terrible. Here is why."

theodp writes "In mid-May, the Department of Homeland Security quietly expanded a program that allows foreign science, technology, engineering and math grads to work in the U.S. for 29 months without a work visa. 'Attracting the best and brightest international talent to our colleges and universities and enabling them to contribute to their professional growth is an important part of our nation's economic, scientific and technological competitiveness,' explained DHS Chief Janet Napolitano. But last week, Senator Chuck Grassley called on the GAO to 'fully investigate' the student visa program, citing reports of abuse and other concerns in his letter. Now, Computerworld reports that the DHS STEM Visa Extension Program continues to be dominated by Stratford University and the University of Bridgeport (as it was in 2010), prompting some tongues to wag. It is 'obvious to any reasonable person that the schools producing most of the OPT students are not prestigious research universities,' quipped policy analyst Daniel Costa, 'which means that many of the OPT students across the country are not in fact the "best and brightest."' While conceding that top students can come from lesser-known schools, 'those will be the exception to the rule,' argued Costa, who suggested the government should include performance metrics in the OPT program, such as grades and university rankings."

sciencehabit writes with an interesting article about the (surprisingly not well studied) effects of rain on flying insects. From the article: "When a raindrop hits a mosquito, it's the equivalent of one of us being slammed into by a bus. And yet the bug will survive and keep flying. That's the conclusion of a team of engineers and biologists, which used a combination of real-time video and sophisticated math to demonstrate that the light insect's rugged construction allows the mosquito to shrug off the onslaught of even the largest raindrop. The findings offer little aid in controlling the pest but could help engineers improve the design of tiny flying robots." Bats, unfortunately, aren't so lucky: "...these furry fliers need about twice as much energy to power through the rain compared with dry conditions."

First time accepted submitter badmojo17 writes "After achieving her lifelong dream of becoming a public school math teacher, my wife has found the profession to be much more frustrating than she ever expected. She could deal with having a group of disrespectful criminals as students if she had competent administrators supporting her, but the sad truth is that her administration causes more problems on a daily basis than her students do. Our question is this: what other professions are open to a bright young woman with a bachelor's degree in math and a master's degree in education? Without further education, what types of positions or companies might be interested in her as an employee?"