00_NOP writes "Venn diagrams are all the rage in this election year, but drawing comprehensible diagrams for anything more than 3 sets has proved to be very difficult. Until the breakthrough just announced by Khalegh Mamakani and Frank Ruskey of the University of Victoria in Canada, nobody had managed to draw a simple (no more than two lines crossing), symmetric Venn diagram for more than 7 sets (only primes will work). Now they have pushed that on to 11. And it's pretty too."

An anonymous reader writes with a question that makes a good follow-on to the claim that mathematics requirements in U.S. schools unnecessarily limit students' educational choices: "I'm a high school student who is interested in a career in a computer science or game development related position. I've been told by teachers and parents that math classes are a must for any technology related career. I've been dabbling around Unity3D and OGRE for about two years now and have been programming for longer than that, but I've never had to use any math beyond trigonometry (which I took as a Freshman). This makes me wonder: will I actually use calculus and above, or is it just a popular idea that you need to be a mathematician in order to program? What are your experiences?"

An anonymous reader writes "Conway's Game of Life is now forty two years old, but it continues to inspire as well as being the basis of an actively researched field, with computer scientists now announcing they have found a new form of the famous 'glider' pattern (once suggested by Eric S Raymond as the insignia of computer hackers) that runs over a so-called Penrose universe."

mikejuk writes "A pair of computer scientists from the Babes-Bolyai University (Romania) and the University of Notre Dame (USA) have made some remarkable connections between Sudoku, the classic k-SAT problem, and the even more classic non-linear continuous dynamics. But before we go into the detail let's look at what this means for Sudoku enthusiasts. Maria Ercsey-Ravasz and Zoltan Toroczkai have devised a scale that provides an accurate determination of a Sudoku puzzle's hardness. So when you encounter a puzzle labelled hard and you find it easy, all you need to do is to compute a co-efficient that measures the hardness of the problem. An easy puzzle should fall in the range 0-1, medium ones in 1-2, hard ones in 2-3, and for ultra-hard puzzles, 3+, with the hardest puzzle, the notorious Platinum Blond, being top of the scale at 3.6. We will have to wait to see if newspapers and websites start to use this measure of difficulty. The difficulty is measured by the time it takes the classical dynamics corresponding to the problem to settle in the ground state and this depends on the degree of chaos in the search for a solution (PDF)."

quax writes "Getting a scientific paper published that goes against the grain of conventional wisdom was never easy. Especially when it seems to contain an obvious glaring mistake. Fortunately despite already being some kind of pop celebrity with no shortage of fan mail, Einstein still opened letters he received from strangers. And this is how a trivial, fateful counting mistake was able to change the course of physics forever."

ananyo writes "In a feature that recalls Asimov's Foundation series and 'psychohistory', Nature profiles mathematician Peter Turchin, who says he can see meaningful cycles in history. Worryingly, Turchin predicts a wave of violence in the United States in 2020. Quoting from the piece: 'To Peter Turchin, who studies population dynamics at the University of Connecticut in Storrs, the appearance of three peaks of political instability at roughly 50-year intervals is not a coincidence. For the past 15 years, Turchin has been taking the mathematical techniques that once allowed him to track predator-prey cycles in forest ecosystems, and applying them to human history. He has analyzed historical records on economic activity, demographic trends and outbursts of violence in the United States, and has come to the conclusion that a new wave of internal strife is already on its way. The peak should occur in about 2020, he says, and will probably be at least as high as the one in around 1970. 'I hope it won't be as bad as 1870,' he adds." We recently discussed similar research into predicting violence in the short term.

Gunkerty Jeb writes "Moxie Marlinspike, the security and privacy researcher known for his SSLStrip, Convergence and RedPhone tools, has released a new tool that can crack passwords used for some VPNs and wireless networks that rely on encryption using Microsoft's MS-CHAPv2 protocol. Marlinspike discussed the tool during a talk at DEF CON over the weekend, and it is available for download."

Capt.Albatross writes "Andrew Hacker, a professor of Political Science at the City University of New York and author of Higher Education? How Colleges Are Wasting Our Money and Failing Our Kids — and What We Can Do About It, attempts to answer this question in the negative in today's New York Times Sunday Review. His primary claim is that mathematics requirements are prematurely and unreasonably limiting the level of education available to otherwise capable students ."

theodp writes "With his Khan Academy: The Hype and the Reality screed in the Washington Post, Mathalicious founder Karim Kai Ani — a former middle school teacher and math coach — throws some cold water on the Summer of Khan Love hippies, starting with U.S. Secretary of Education Arne Duncan. From the article: 'When asked why so many teachers have such adverse reactions to Khan Academy, Khan suggests it's because they're jealous. "It'd piss me off, too, if I had been teaching for 30 years and suddenly this ex-hedge-fund guy is hailed as the world's teacher." Of course, teachers aren't "pissed off" because Sal Khan is the world's teacher. They're concerned that he's a bad teacher who people think is great; that the guy who's delivered over 170 million lessons to students around the world openly brags about being unprepared and considers the precise explanation of mathematical concepts to be mere "nitpicking." Experienced educators are concerned that when bad teaching happens in the classroom, it's a crisis; but that when it happens on YouTube, it's a "revolution."'"

waderoush writes "Even as name-brand universities like MIT and Harvard rush to put more courses on the Web, they're vying with an explosion of new online learning resources like Coursera, Udacity, Udemy, Dabble, Skillshare, and, of course, Khan Academy. With 3,200 videos on YouTube and 4 million unique visitors a month, Sal Khan's increasingly entertaining creation is the competitor that traditional universities need to beat if they want to have a role in inspiring the next generation of leaders and thinkers. Lately Khan's organization has been snapping up some of YouTube's most creative educational-video producers, including 'Doodling in Math Class' creator Vi Hart and Smarthistory founders Beth Harris and Steven Zucker. Universities are investing millions in software for 'massive online open courses' or MOOCs, but unless they can figure out how to make their material fun as well as instructive, Khan may have an insurmountable lead." The Chronicle of Higher Education has a related article about the above-mentioned Coursera, and how they plan to make money off of free courses. A contract the company signed with the University of Michigan suggests they aren't quite sure yet.

theodp writes "The White House has unveiled a proposal to create a national elite teachers corps to reward the nation's best educators in science, technology, engineering and math. In the first year, as many as 2,500 teachers in those subjects would get $20,000 stipends on top of their base salaries in exchange for a multiyear commitment to the STEM Master Teacher Corps. The Obama administration plans to expand the corps to 10,000 nationwide over the next four years, with the ultimate goal that the elite group of teachers will pass their knowledge and skills on to their colleagues to help bolster the quality of teaching nationwide."

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?"