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  • how would you like computer science classes to be taught?

    - by aaa
    hello I am a graduate student now, and hopefully someday I will teach. my interests are C++, Python, embedded languages, and scientific computing. Meanwhile I daydream about how I would teach. I was not quite happy with my undergraduate university as I found many computer science classes lacking. so I would like to ask you, if you were a student, how would you like your computer science classes to be taught? I understand it is a very subjective question, but nevertheless I think it's important to know what people want. Some specific points I am interested in: should computer languages be taught explicitly, or should students be required to pick up language on their own? what is better for learning, tests, projects, some sort of take-home exam? how do you think classtime should be used? theory, introduction, explanations, etc.? do you think the group projects are important? how much about computer architecture do you want to learn in computer science class, not necessarily assembler class. should particular operating system/editor be mandated or encouraged? Thanks thank you for your comments. Question has been closed because it is a discussion question rather than Q&A. If you know appropriate website for discussions of such sort with low noise ratio, please let me know.

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  • After travelling back in Firefox history, javascript won't run.

    - by Patonza
    When I use the back button on Firefox to reach a previously visited page, scripts on that page won't run again. Is there any fix/workaround to have the scripts execute again when viewing the page the second time? Please note that I have tested the same pages on Google Chrome and Internet Explorer and they work as intended. Here are the files and the steps I used to test the problem: (navigate to 0.html, click to get to 1.html, back button) 0.html <html><body> <script type="text/javascript"> window.onload = function() { alert('window.onload alert'); }; alert('inline alert'); </script> <a href="1.html">Click Me!</a> </body></html> 1.html <html><body> <p>Go BACK!</p> </body></html>

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  • Setting up a Git remote with a truncated history

    - by drg
    I am in the midst of doing some non-standard, probably doomed, experiments on a git repository. The goal is to create a remote repository with a truncated history which can still share commits with an internal repository which has a full history. I've had some success using a graft to connect the public history with the private history - when I push from my internal repository, only the post-graft contents are included. So my main question is: what is the simplest way of taking a commit, eliminating its parent and writing a graft in place of the parent? A more general question: is what I'm trying to do going to cause me pain in the long run, do you know if there's a better way?

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  • How to Detect an Event Coming from the Firefox History Dropdown Box

    - by banterCZ
    How to detect an event coming from the Firefox history dropdown box? I need to distinguish between the enter key simply pressed on input field or on item from his native history dropdown box. The reason is that I would like to call custom submit button (not first one, which is default) on the enter key pressed on any input field. But right now, the enter key pressed on history dropdown box unfortunately call submit as well.

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  • Git - how do I view the change history of a file

    - by Richard
    How can I view the change history of an individual file, complete with what has changed ? I have got as far as : git log -- filename which shows me the commit history of the file, but how do I get at the content of each of the changes ? Thanks - I'm trying to make the transition from MS SourceSafe and that used to be a simple right click / show history.

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  • How can I view the history on the trunk from my branch

    - by Ralph Shillington
    View History on an file in a branch show only changes since the branch. I need to go back further -- like how created the file in the first place. I've also tried Sidekicks, and it doesn't seem to show history from before the branch either. Short of hunting down the file in the trunk manually, is there a way to view a file's history from the time it was added to now following the path in the branch?

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  • Read Call History from iPhone on iOS 5 and above

    - by Sandeep Dhama
    I am developing an application and need to read the users call history from iPhone.I have go though all the forums and google it and found that we can get the records from teh callHistory sqlite database by "private/var/root/Library/CallHistory/call_history.db". But this path is not working from iOS 5 and above. Seems like apple has changed all their database path and structure so that no one can accees it. I have also seen some of the application on iTunes who are capable of getting the users call history like:-https://itunes.apple.com/us/app/callog/id327883585?mt=8 I have also check a mac desktop utility called "WonderShare Dr.Fone" which will fetch all the data from your iPhone like call history messages, notes , etc.How this utility is fetching the call history records and other details? If their is any API or private APIs by which i can get the callHistory data path please let me know.

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  • DVCS - What's the downside of rewriting unpublished history?

    - by user1447278
    I was wondering what in particular is the downside of "losing history" in a development process. One famous example is of course git rebase -i / git merge --squash, but also what is described here: http://fourkitchens.com/blog/2009/04/20/alternatives-rebasing-bazaar under "I want to clean up my commit history prior to submitting my changes to the mainline." I can see that exporting patches and applying them to another branch would lose the "history" of the branch, but why would that branch and its commit history be useful after it has been merged? Can someone elaborate on why such techniques are considered "dirty"? Why does it matter in which order changes were originally committed in the first place as long as they can be applied to the main branch?

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  • Strategy for restoring state via URL in web apps

    - by JW01
    This is a question about modern web apps, where a single page is loaded, and all subsequent navigation is done by XHR calls and modifying the DOM. We can use libraries that manipulate the hash string, which let us navigate by URL and support the back/forward buttons. But to use those libraries, we need to be able to move the UI from any one state to any other. Is there a good strategy for moving between UI states, that also allows them to be restored from scratch when you load a new URL? In a complex app, you might have a lot of different states. You don't want to reload the entire UI each time you change states. But you also don't want to require separate methods for moving from every state to each every state. Typically we need to: Restore a state from scratch, when you enter a new URL or hit Reload. Move from one state to another, when you use the Back/Forward buttons. Move from one state to another, when you perform an action within your app (like clicking a link). Move to certain states that shouldn't be added to the history, like ones that appear after form submissions. Move to some states that are built on the previous state, like a drill-down list. When you perform actions within your app, there's the additional question of which comes first: Do you change the URL, listen for the URL change, and change your state in response to it? Or do you change your state, then change the URL, but don't do anything in response? Does anyone have some experience to share on this topic?

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  • Why is Quicksort called "Quicksort"?

    - by Darrel Hoffman
    The point of this question is not to debate the merits of this over any other sorting algorithm - certainly there are many other questions that do this. This question is about the name. Why is Quicksort called "Quicksort"? Sure, it's "quick", most of the time, but not always. The possibility of degenerating to O(N^2) is well known. There are various modifications to Quicksort that mitigate this problem, but the ones which bring the worst case down to a guaranteed O(n log n) aren't generally called Quicksort anymore. (e.g. Introsort). I just wonder why of all the well-known sorting algorithms, this is the only one deserving of the name "quick", which describes not how the algorithm works, but how fast it (usually) is. Mergesort is called that because it merges the data. Heapsort is called that because it uses a heap. Introsort gets its name from "Introspective", since it monitors its own performance to decide when to switch from Quicksort to Heapsort. Similarly for all the slower ones - Bubblesort, Insertion sort, Selection sort, etc. They're all named for how they work. The only other exception I can think of is "Bogosort", which is really just a joke that nobody ever actually uses in practice. Why isn't Quicksort called something more descriptive, like "Partition sort" or "Pivot sort", which describe what it actually does? It's not even a case of "got here first". Mergesort was developed 15 years before Quicksort. (1945 and 1960 respectively according to Wikipedia) I guess this is really more of a history question than a programming one. I'm just curious how it got the name - was it just good marketing?

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  • How do I prevent Pidgin from loading XMPP chat room history on join?

    - by Mr. Jefferson
    In Pidgin, when I join a chat room, it loads the chat room history. iChat on the Mac has a preference in the Accounts section to set a variable amount of history to load, or disable loading history entirely. How do I do the same thing in Pidgin? Is there a preference somewhere that I've missed? The object is to have the chat room start fresh each day, so I'd also be fine with disabling chat room history entirely on the server if that's possible. But I didn't see that option either when I looked in Server Admin on the server. I found this list of XMPP room types, and it looks like creating a Temporary Room might be the best way to do this, but I don't want to have to create the room manually every morning. Right now I've got Pidgin set to auto-join the room when I log in; I want it to do that without loading history. EDIT: The XMPP multi-user chat spec referenced above also contains a section on managing history. And I got this to work by pulling up the XMPP Console plugin in Pidgin, copying the <presence /> stanza it sent when I joined the room, closing the room, pasting the stanza into the console, adding the <history /> element and sending it. When I opened the room again, I had no history. But it all came back the next time! So: how do I get Pidgin to send the <history /> stanza by default?

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  • Firefox v15.0 about:newtab inaccessible via the back button

    - by Willem
    As of this morning I upgraded my Firefox to version 15.0. Or well, it did it for me. That's when my issue began. I've configured Firefox so that when I open up a new tab via Ctrl-T that it loads the about:newtab page which was released in version 14.x(?). I use this functionality extensively. I visit a page from the about:newtab page, read it, press the back button and pick another frequent website from the display I want to visit. However as of v15.0 the latter part is no longer functioning, after visiting a website from the about:newtab page the back button will not let me go back to the about:newtab page. Firefox acts as if that history entry was never there. I've tried searching the release notes to see if this change was intentional or a reported bug, but I have not found anything related so far. Is there anyway to (re)configure the new Firefox v15.0 to let me access the about:newtab page via a tab's history? EDIT: It appears that this only affects the initial 'visit' to the about:newtab page when opening a new tab, manually visiting about:newtab will register it as a history entry and allow it to be navigated to via the back and forward buttons. So I guess this changes my question to 'How can I make Firefox 15.0 treat the inital page from a newtab as a history entry'.

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  • My computer freezes irregularly

    - by Manhim
    My computer started to freeze at irregular times for 3 weeks now. Please note that this question change with each things that i try. (For additional details) What happens My computer freezes, the video stops. (No graphic glitches, it just stops) Sound keeps playing up to some time (Usually 10-30 seconds) then stops playing. Sometimes, randomly, the screen on my G-15 keyboard flickers and I see caracters not at the right places. Usually happens for about 1-2 seconds and a bit before my computer freezes. I have to keep the power button pressed for 4 seconds to shut my computer down. I still hear my hard drives and fans working. Sometimes it works with no problems for a full day, some other times it just keeps freezing each time I restart my computer and I have to leave it for the rest of the day. Sometimes my mouse freezes for a fraction of a second (Like 0.01 to 0.2 seconds) quite randomly, usually before it freezes. No errors spotted by the "Action center" unlike when I had problems with my last video card on this system (Driver errors). My G-15 LCD screen also freezes. Sometimes my G-15 LCD screen flickers and caracters gets caried around temporary under heavy load. Now, most of the times, the BIOS hard disks boot order gets reversed for some reason and I have to put it to the right one and save each times I boot. (Might be unrelated, not sure, but it first started yesterday) Sometimes the BIOS doesn't detect my 750GB hard drive plugged in SATA1. What I did so far I have had similar problems in the past and I had changed my hard drive (It was faulty), so I tested my software RAID-0 array and it was faulty so I changed it. (I reinstalled Windows 7 with this part). I also tested with unplugging my secondary hard drive. My CPU was running at about 100 degree Celsius, I removed the dust between the fans and the heatsink and it's now between 45-55. I ran a CPU stress-test and it didn't freeze during the tests (using Prime95 on all cores) Ran a memory test (using memtest86+) for a single pass and there were no errors. Ran a GPU stress test with ati-tools and furmark and it didn't freeze during the tests. (No artefacts either) I had troubles with my graphic card when I got it, but I think that it got fixed with a driver update. I checked the voltages in my BIOS setup and they all seemed ok (±0.2 I think). I have ran on the computer without problems with Fedora 15 on an external hard drive (Appart that it couldn't load Gnome 3 and was reverting to Gnome 2, didn't want to install drivers since I use it on multiple computers) I used it to backup my files from the raid array to my 1TB hard drive for the reinstallation of Windows. (So the crashes only happenned on Windows) [The external hard drive is plugged directly on a SATA port] I contacted EVGA (My graphic card vendor) and pointed them on this question, I'm looking for an answer. Ran sensors on Fedora 15 and got this output: http://pastebin.com/0BHJnAvu Ran 6 short different CPU stress test on Fedora 15 (Haven't found any complete stress testers for Linux) and it didn't crash. Changed the thermal paste to some Artic Silver 5 for my CPU and stress tested the CPU, temperature was at 50 idle, then 64 highest and slowly went down to 62 during the test. Ran some stress testing with a temporary graphic card and it went ok. Ran furmark stress test with my original graphic card and it freezed again. GPU had a temp of 74C, a CPU temp of 58C and a mobo temp of 40C or 45C (Dunno which one it is from SpeedFan). Ran a furmark stress test and a CPU stress test at the same time, results: http://pastebin.com/2t6PLpdJ I have been using my computer without stressing it for about 2 hours now and no crashes yet. I also have disabled the AMD Cool'n'quiet function on the BIOS for a more regular power to the CPU. When I ran Furmark without C'n'q my computer didn't freeze but I had a "Driver Kernel Error" that have recovered (And Furmark crashed) all that while running a CPU stress test. The computer eventually frozed without me being at it, but this time my screen just went on sleep and I couldn't wake it. Using the stability tester in nTune my computer freezed again (In the same manner as before). I notived that Speedfan gives me a -12V of -16.97V and a -5V of -8.78V. I wonder if these numbers are reliable and if they are good or bad. I have swapped my G-15 with another basic USB keyboard (HP) and I have ran furmark for about 10 minutes with a CPU stability test running each 60 seconds for 30 seconds and my computer haven't crashed yet. Ran some more extended tests without my G-15 and it freezed like it usually do. Removed the nForce Hard disk controler. Disabled command queuing in the NVIDIA nForce SATA Controller for both port 0 and port 1 (Errors from the logs) Used CPUID HwMonitor, here are the voltages: http://pastebin.com/dfM7p4jV Changed some configurations in the motherboard BIOS: Disabled PEG Link Mode, Changed AI Tuning to Standard, Disabled the 1394 Controller, Disabled HD Audio, Disabled JMicron RAID controller and Disabled SATA Raid. When it happens When I play video games (Mostly) When I play flash games (Second most) When I'm looking at my desktop background (It rarely happens when I have a window open, but it does, sometimes) When my Graphic card and my CPU are stressed. Sometimes when my Graphic card is stressed. Never happenned while stressing only the CPU. Sometimes when my CPU is stressed. Specs Windows Seven x64 Home Premium Motherboard: M2N-SLI Deluxe CPU: AMD Phenom 9950 x2 @ 2.6GHz Memory: Kingston 4x2GB Dual Channel (Pretty basic memory sticks) Hard drives: Was 2x250GB (Western digital caviar) in raid-0 + 1TB (WD caviar black), I replaced the raid array with a 750GB (WD caviar black) [Yes I removed the array from the raid configurations] 750W Power supply No overcloking. Ever. There have been some power-downs like 4-5 weeks ago, but the problem didn't start immediately after. (I wasn't home, so my computer got shut-down) Event logs (Warnings, errors and critical errors) for the last 24 hours: http://pastebin.com/Bvvk31T7 My current to-try list Reinstall the drivers and software 1 by 1 and do extensive stress testing between each. Update the BIOS firmware to the most recent stable one. Change my motherboard. Status updates Keeping only the last 3 (28/06 04pm) More stress testing and still pass the tests. (28/06 03pm) Been stress testing for 10 minute straight now and 5 minutes with both CPU and GPU being stressed at the same time. (28/06 03pm) Stress-testing right now, so far no problems. A little hope Tests with Furmark and Prime95. Testing Windows bare-bone: 30 Minutes stress, no freeze. Installing an Anti-virus and some software, restarting computer. Testing with Anti-virus and some software (No drivers installed): 30 Minutes stress, no freeze. Installing audio drivers, restarting computer. Testing with the audio drivers: 30 Minutes stress, no freeze. Installing the latest graphic drivers from EVGA's website (without 3d vision since I don't use it), restarting computer. Testing with the graphic drivers: 30 Minutes stress, no freeze. Configuring Windows to my liking and installing more softwares. In this situation, how can I successfully pin-point the current hardware problem? (If it's a hardware problem) Because I don't really have the budget to just forget and replace everything. I also don't really have hardware to test-replace current hardware.

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  • How copy with shell commands(Linux) from 1 computer have (permanent url + open port) to 2 computer (secure way)?

    - by BenBen
    How copy with shell commands(Linux) from remote(my office computer) computer (permanent url + open port) to my (home) computer home/remote_computer_user/Desktop/test1.txt to my home computer home/home_computer_user/Downloads/ ? What I am doing: 1. ssh <user>@<computer1address> -p <port> :: success to get remote computer shell () 2. (I think I should use scp , but I dont how exactly in my case) Please if you can, write the exact commands that i should to from the shell Thanks in advance

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  • Which part of the computer needs all the power from the PSU?

    - by Xeoncross
    A couple years ago I was building a new Core 2 Quad system and after reading all the reviews was convinced that I would need at least a 400 watt power supply unit (PSU). I bought a 500W Antec EarthWatts However, last year I bought a Kill-A-Watt power meter to test some things around our house and found that my PC was only using 80W of power while idle! (C2Q, 4GB RAM, SATA HD, & DVD burner) Well, here I am building another computer with a 65watt Core 2 CPU in it and I'm wondering if I can skimp out this time and get a 300watt or so unit since my usage doesn't seem to be what everyone claims it is. I'm sure that the people in the reviews who exhausted 500watt PSU weren't lying - so what is it that uses all that? The high-end dual SLI video cards? Lots of SATA drives? Overclocking?

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  • How do I know which hardware components are compatible when building a computer?

    - by darkie15
    I am trying to setup my own new computer. I haven't done this before and hence needed guidance from all here. I can google out the results for steps to follow for setting up my machine, but I do not understand what components are compatible with each other? For example there must be specific models of motherboard that are compatible with Intel Core i5-2500K Sandy Bridge 3.3GHz. In general, if there is a website that can guide me on all compatible components, that would be great. If not, how would I be able to check compatibility?

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  • Building computer: Casing for peripheral sockets is a pain!

    - by burnt1ce
    I have a casing the covers the spacing between the peripheral socket which is standard to have when you buy a motherboard. My problem with these covers is that they have spokes that pushes the motherboard away so the sockets don't even come out of the covers. This also misaligns the screws on my atx motherboard with the holes in my computer case. I usually break these spokes so that i can align my motherboard correctly. Why the heck do motherboard manufacture put spokes on these covers? am i using them wrong? UPDATE Here's an image that i found that shows the plastic casing. http://z.about.com/d/pcsupport/1/5/m/-/-/-/tour%5Fexternal.jpg You can even see the indentation that makes the spokes that pushes the motherboard inwards.

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  • How to remove the smell of cigarette from the computer?

    - by Tio
    So I'm a smoker, and of course I smoke in front of the computer when I'm at home. On last Friday I moved out from my mothers house to my own, and since the computers were always turned on and the room was a room that everybody could smoke, the smell didn't bother me. At my new home, I turned them on, about 15 minutes ago, and I'm dying because of the smell of cigarette ( this may be kind of stupid from a smoker, but I hope some of you understand ). This solution has to be relatively quick, because I can't stay without the desktop and the server for one week, for example. Tomorrow, I'm going to open them both, and remove all dust there is inside, this should clear some of the smell, but probably won't remove it completely. Does anyone know a technique to get rid of the smell?

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  • Ideal laptop specs for a Computer Science Masters student?

    - by Ayush
    I have a HP pavillion core 2 duo 2 GHz and 4 GB RAM, and it is painful to use this machine for any kind of coding. Eclipse (especially Juno) literally takes 5 minutes to load. And even after that, everything is lagy. Apart from school stuff, I also use my computer as a television. I watch Hulu, Netflix, YouTube etc in 720p, and this laptop gets hot as hell and the fans are loud enough to wake somebody up from deep sleep. I DON'T use my laptop for Gaming or Video/Photo Editing. I'm looking to buy a new laptop (in which most widely used IDEs would work smoothly and playing hi-def videos wouldn't be too much for the machine to handle) any suggestions (on hardware specs) would be greatly appreciated. Thanks

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  • Make Your 64 bit Computer Look like a Commodore 64

    - by Matthew Guay
    The Commodore 64 was one of the bestselling home computers ever, and many geeks got their first computing experience on one of these early personal computers. Here’s an easy way to revisit the early years of personal computing with a theme for Windows 7. With only 64Kb of ram and an 8 bit processor, the Commodore 64 is light-years behind today’s computers.  But with a Windows 7 themepack, you can turn back the years and give your computer a quick overhaul to look more like its ancient predecessor. Age Windows 7 with a click Download the Commodore 64 theme from PC World (link below), and unzip the files. Now, double-click on the Themepack file to apply the theme. This will open your Personalization panel and will automatically change your system fonts, window style, background, and more. Your desktop will go from your Windows 7 look… to a modified Windows 7 look that is reminiscent of the Commodore 64. Open an application to see all the changes … notice the old-style font in the Window boarder and menus. This theme also changes your Computer, Recycle Bin, and User folder icons to Commodore 64-inspired icons. And, if you want to go back to the standard Windows 7 look and feel, it’s only a click away in the Personalization dialog.  Right-click on your desktop, select Personalize, and then choose the theme you want.   Conclusion Although this doesn’t give you the real look and feel of the Commodore 64, it is still a fun way to experience a bit of computer nostalgia.  There are tons of excellent themes available for Windows 7, so check back for more exciting ways to customize your desktop! Link Download the Commodore 64 theme for Windows 7 Similar Articles Productive Geek Tips Make MSE Create a Restore Point Before Cleaning MalwareMake Ubuntu Automatically Save Changes to Your SessionMake Windows Vista Shut Down Services QuickerChange Your Computer Name in Windows 7 or VistaMake Windows 7 or Vista Log On Automatically TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 Dark Side of the Moon (8-bit) Norwegian Life If Web Browsers Were Modes of Transportation Google Translate (for animals) Out of 100 Tweeters Roadkill’s Scan Port scans for open ports

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  • Mathematics for Computer Science

    - by jiewmeng
    I am going into university next year. I think maths would be one of the more important aspects of computer science? I recently saw the MIT Intro to Algorithms video on YouTube and the maths required is quite hardcore. I wonder what parts of maths do i need, probability, calculus, trigo etc. Will the book Concrete Mathematics - it claims to be foundation for computer science - on Amazon cover most of whats required?

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  • Computer Visionaries 2014 Kinect Hackathon

    - by T
    Originally posted on: http://geekswithblogs.net/tburger/archive/2014/08/08/computer-visionaries-2014-kinect-hackathon.aspxA big thank you to Computer Vision Dallas and Microsoft for putting together the Computer Visionaries 2014 Kinect Hackathon that took place July 18th and 19th 2014.  Our team had a great time and learned a lot from the Kinect MVP's and Microsoft team.  The Dallas Entrepreneur Center was a fantastic venue. In total, 114 people showed up to form 15 teams. Burger ITS & Friends team members with Ben Lower:  Shawn Weisfeld, Teresa Burger, Robert Burger, Harold Pulcher, Taylor Woolley, Cori Drew (not pictured), and Katlyn Drew (not pictured) We arrived Friday after a long day of work/driving.  Originally, our idea was to make a learning game for kids.  It was intended to be multi-simultaneous players dragging and dropping tiles into a canvas area for kids around 5 years old. We quickly learned that we were limited to two simultaneous players. After working on the game for the rest of the evening and into the next morning we decided that a fast multi-player game with hand gestures was not going to happen without going beyond what was provided with the API. If we were going to have something to show, it was time to switch gears. The next idea on the table was the Photo Anywhere Kiosk. The user can use voice and hand gestures to pick a place they would like to be.  After the user says a place (or anything they want) and then the word "search", the app uses Bing to display a bunch of images for him/her to choose from. With the use of hand gesture (grab and slide to move back and forth and push/pull to select an image) the user can get the perfect image to pose with. I couldn't get a snippet with the hand but when a the app is in use, a hand shows up to cue the user to use their hand to control it's movement. Once they chose an image, we use the Kinect background removal feature to super impose the user on that image. When they are in the perfect position, they say "save" to save the image. Currently, the image is saved in the images folder on the users account but there are many possibilities such as emailing it, posting to social media, etc.. The competition was great and we were honored to be recognized for third place. Other related posts: http://jasongfox.com/computer-visionaries-2014-incredible-success/ A couple of us are continuing to work on the kid's game and are going to make it a Windows 8 multi-player game without Kinect functionality. Stay tuned for more updates.

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