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Best Way To Build A DIY UAV? 259

Shojun writes "I am very interested in building my own UAV. Not just one that can fly around happily, but one that I can program to say, take photos every second as it does a barrel roll under a bus (ok, that part may be a pipe dream). I have enough embedded programming experience — it's the hardware which I'm uncertain about. I can go the kit way, and then build the remaining stuff, or get some Dollar Tree Foam boards and build it all. I'm in favor of ease, however. Once the plane is built, buying a dev board seems like a possibility, but I wonder whether it's overkill. Alternatively, if there was a How-to-build example on the net for such an activity that I could adapt, to the degree that I could then program in even completely hardcoded flight instructions, I can certainly take it from there. Thoughts? Has anyone here tried something like this before?"
Social Networks

Facebook Users Get Lower Grades In College 284

Hugh Pickens writes "According to a survey of college students Facebook users have lower overall grades than non-users. The study by Aryn Karpinski, an education researcher at Ohio State University, found that Facebook user GPAs are in the 3.0 to 3.5 range on average, compared to 3.5 to 4.0 for non-users and that Facebook users also studied anywhere from one to five hours per week, compared to non-users who studied 11 to 15 or more hours per week. Karpinski emphasized that correlation does not equal causation and that the grades association could be caused by something else. 'I'm just saying that there's some kind of relationship there, and there's many third variables that need to be studied.' One hypothesis is that students who spend more time enjoying themselves rather than studying might tend to latch onto the nearest distraction, such as Facebook or that students who use the social networking site might also spend more time on other non-studying activities such as sports or music. 'It may be that if it wasn't for Facebook, some students would still find other ways to avoid studying, and would still get lower grades. But perhaps the lower GPAs could actually be because students are spending too much time socializing online.' As for herself, Karpinski said she doesn't have a Facebook account, although the co-author of the study does. 'For me, I think Facebook is a huge distraction.'"
Slashdot.org

Achievements and Optimizations 294

This week's code refresh has added a number of really irritating story display bugs that we're working on. But, it also added a number of cool optimizations that should improve performance for a lot of readers. Tap that link below to read a brief description of them, and also a few serious notes about the achievement system we launched last Wednesday.

Comment Re:What about software? (Score 1) 571

As a fellow civil engineering student, I suggest you check out students.autodesk.com. They've got a bunch of their programs for free, if you are willing to put up with having a small watermark around the outside border of anything you print. It's quite nice.

I still agree, that it's really important to have a lab. I don't need to drag my laptop around with me to classes, and I can check email in a lab between classes or do work on the computers as need. Plus, it helps to be able to have a computer that is for lack of a better term, sterile. I don't have all the distractions of games, bookmarks I check daily, IM, etc. on a lab computer as I do on my own. It's easier to work on one of them than on mine.
Biotech

UV-Resistant Micro-Organisms Discovered In the Stratosphere 156

junglee_iitk writes "Three new species of bacteria, which are not found on earth and highly resistant to ultraviolet radiation, have been discovered in the upper stratosphere by some Indian scientists. These bacteria, which do not match any species on earth, were found in samples collected through a balloon sent up to the stratosphere in April 2005. The payload consisted of a cryosampler containing 16 evacuated and sterilised stainless steel probes. Throughout the flight, the probes remained immersed in the liquid neon to create a 'cryopump effect.' These cylinders after collecting air samples from different heights ranging from 20 to 41 km were parachuted down and safely retrieved, it said." Here's the Indian Space Research Organisation's press release on the discovery. Adds an anonymous reader: "This paper in International Journal of Astrobiology [PDF] speculates how microorganisms reach the stratosphere."

Comment I love Python, but... (Score 1) 214

If you're teaching them programming, and they might not all use it, maybe you should think about using MS Excel. It seems everyone uses Excel in some form, but the people who can really get into the nitty-gritty of it can do some really useful stuff. Excel is on just about every computer these days, or some similar spreadsheet, and while it's not a traditional programming language, it does require the use of logic to figure out how to set up a series of cells with different commands to give you the answer you want.

Python on the other hand, is much more traditional, and might be a bit more straightforward to teach, but I still think more students would find useful skills they can use everyday in Excel rather than in Python. If they were all going towards engineering or comp-sci, Python would be good, but for the future business people in your class, knowing how to use Excel, and use it very efficiently is a huge plus in the "real world".
Programming

Hope For Multi-Language Programming? 371

chthonicdaemon writes "I have been using Linux as my primary environment for more than ten years. In this time, I have absorbed all the lore surrounding the Unix Way — small programs doing one thing well, communicating via text and all that. I have found the command line a productive environment for doing many of the things I often do, and I find myself writing lots of small scripts that do one thing, then piping them together to do other things. While I was spending the time learning grep, sed, awk, python and many other more esoteric languages, the world moved on to application-based programming, where the paradigm seems to be to add features to one program written in one language. I have traditionally associated this with Windows or MacOS, but it is happening with Linux as well. Environments have little or no support for multi-language projects — you choose a language, open a project and get it done. Recent trends in more targeted build environments like cmake or ant are understandably focusing on automatic dependency generation and cross-platform support, unfortunately making it more difficult to grow a custom build process for a multi-language project organically. All this is a bit painful for me, as I know how much is gained by using a targeted language for a particular problem. Now the question: Should I suck it up and learn to do all my programming in C++/Java/(insert other well-supported, popular language here) and unlearn ten years of philosophy, or is there hope for the multi-language development process?"
Microsoft

Microsoft and Red Hat Team Up On Virtualization 168

mjasay writes "For years Microsoft has insisted that open-source vendors acknowledge its patent portfolio as a precursor to interoperability discussions. Today, Microsoft shed that charade and announced an interoperability alliance with Red Hat for virtualization. The nuts-and-bolts of the agreement are somewhat pedantic, providing for Red Hat to validate Windows Server guests to be supported on Red Hat Enterprise virtualization technologies, and other technical support details. But the real crux of the agreement is what isn't there: patents. Red Hat has long held that open standards and open APIs are the key to interoperability, even as Microsoft insisted patents play a critical role in working together, and got Novell to buy in. Today, Red Hat's vision seems to have won out with an interoperability deal heavy on technical integration and light on lawyers."

Comment It's not a bad idea. (Score 1) 585

I have an EZPass (the east coast automated tag thing on my car). I go to school in Washington, DC, and I live in South Jersey. When I drive, I don't notice the total cost of the tolls, and I think it's because of tag. I asked a friend to pick me up at a train station near the end of the MARC (Maryland's train system) line, and I ended up costing him $13 that he paid out of his wallet, and that's just on the way back from the train. I paid him back, but I didn't realize how many tolls there are on I95.

As far as the idea of turning roads into toll systems, I'd prefer the tags. They're a bit more anonymous than a license plate, which could easily be traced by DMV records. I know many people who own one or two tags and just put it in whatever car they're taking for a long trip. My big worry is the day that the politicians realize you can use these things to track how fast people are driving by comparing the time into the system to the time out with the distance driven. I did read an interesting article the other day about an economist proposing we solve our traffic congestion and road funding problems by implementing a dynamic tolls system on all the major highways. A busy road would have a higher toll than a less crowded road, encouraging people to take the cheaper route, and at the same time, providing funds for the highway system. Usually in my travels between DC and home, or between home and my friends in Delaware, I take either 295, a bit longer of a drive, but less crowded, or the New Jersey Turnpike, which has an exit that is a few miles closer to home, which is more direct but seems to be more crowded when I drive it. With some well placed electronic signs, I could tell which route will have more traffic, and the state would make money on both routes, not just the turnpike.

Comment Not to be negative... (Score 2, Insightful) 497

But if you're not in a position to know how much your university spends on software and be able to compare it to how much revenue the university has, you're not in a position to really make a change to open source. Second, thinking of my dealings with fellow university students (I'm an OSS using university student as well), I know many of them would rather use the MS/proprietary version that just works than deal with often buggy open source software that's not always compatible or has bugs left and right. Your university has to deal with the outside world, which is still deeply entrenched in MS Office, unless you're going to show all your students how to export from Open Office to an MS Office format, expect a lot of complaints. Granted, Open Office isn't as buggy as some things, but if you have engineering students who need a good CAD program, don't count on finding a good open source program for them. I wish you luck, but you're really fighting the tide here.

Comment Historical Figures (Score 1) 1397

My systems are named after famous places, and the hard drives named by the first names of people who made that place famous. My MacBook Pro, and related drives: Los Alamos Robert (Oppenheimer) - internal drive Albert (Einstein, ... Okay, somewhat related, this was my original internal drive, now an external) John (Von Neumann) Leo (Szilard, again, only slightly related) My PC / media system: Kitty Hawk Wilbur Orville I used to have my PC drives partitioned and named after the five Space Shuttles, and the system was called Canaveral.
Math

Miscalculation Invalidates LHC Safety Assurances 684

KentuckyFC writes "In a truly frightening study, physicists at the University of Oxford have identified a massive miscalculation that makes the LHC safety assurances more or less invalid (abstract). The focus of their work is not the safety of particle accelerators per se but the chances of any particular scientific argument being wrong. 'If the probability estimate given by an argument is dwarfed by the chance that the argument itself is flawed, then the estimate is suspect,' say the team. That has serious implications for the LHC, which some people worry could generate black holes that will swallow the planet. Nobody at CERN has put a figure on the chances of the LHC destroying the planet. One study simply said: 'there is no risk of any significance whatsoever from such black holes.' The danger is that this thinking could be entirely flawed, but what are the chances of this? The Oxford team say that roughly one in a thousand scientific papers have to be withdrawn because of errors but generously suppose that in particle physics, the rate is one in 10,000."
The Military

The Unmanned Air Force 352

coondoggie writes "How important have unmanned aircraft become to the US military? Well how's this: the Air Force says next year it will acquire more unmanned aircraft than manned. Air Force Lt. Gen. Norman Seip this week said the service is 'all in' when it comes to developing unmanned systems and aircraft. 'Next year, the Air Force will procure more unmanned aircraft than manned aircraft,' the general said. 'I think that makes a very pointed statement about our commitment to the future of [unmanned aircraft] and what it brings to the fight in meeting the requirements of combatant commanders.'"

Comment It's great for interns... (Score 1) 1055

I worked it once as an intern. 9 hour days, 8 hours the first friday, off on the next. It was nice because it gave me a chance to take every other weekend off to go do things with friends, like roadtrips, either back home or to the beach. What I didn't like was that I had an hour and a half commute each way, so the 9 hours, plus commute time made for a really long day. Up at 6, and not usually back until 6 or 7, depending on the traffic through DC. As an intern I was never asked to come in on that day, and the job wasn't one where I had urgent deadlines to meet. In the future, I'm not sure if I would do it. It'd really depend on having a shorter commute and knowing that I had something to do on that Friday.

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