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  • Is the Windows Start button an example of poor mapping? [migrated]

    - by user336359
    In my recent course on HCI, I've been told that start button on Windows systems is an example of poor mapping. The reason for that, as explained in materials, is that it doesn't start anything, but rather reveals a menu. I think that this is only valid if you approaching this from low level of abstraction (meaning that the button must start something). If you on the other hand take a view on this from higher level of abstraction, as of "Place where I start most of my tasks", i.e. This is the place where you are start*ing the task of switching off your computer This is the place where you are start*ing the task of searching for something on your computer This is the place where you are start*ing the task of running a program This is the place where you are start*ing the task ... Then I think it makes perfect sense and has perfect mapping. Is this a sensible interpretation?

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  • Booting but not rebooting from external USB hard drive, what could be the problem?

    - by user8276
    I have a Dell Inspiron 6400 laptop with a dead internal hard drive controller. It boots perfectly from CD or USB. I therefore removed the internal hard drive and installed Ubuntu 10.10 Maverick onto an external USB hard drive. It boots and runs perfectly when doing a "cold start" of the PC. However, when I choose restart/reboot in the Ubuntu menu (e.g. after an update), I get this error message from the BIOS: "No bootable devices, strike f1 to retry boot, f2 for setup utility, press f5 to run onboard diagnostics". I can make the system boot again by pressing f2 or f5 and exiting the utility without having done anything. Or, I can simply power off the system and do a new "cold start". Does anyone know the likely reason for this problem and how to fix it. It is not a big issue but an annoyance that I would like to fix if possible.

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  • What are good/fast methods to pull data from a database using JavaScript?

    - by Yatrix
    I'm pretty new to web technologies and I am creating a filter control that will have cascading controls. We are doing a lot of this through JavaScript and are debating the best route to take to the database. HTTPHandlers, WebServices and Ajax are all being considered (or a combination of them). We want to be able to handle a million rows in theory, so it has to be scalable to at that. We are going through JavaScript as our page must not do post-backs, if your'e wondering. I'm asking from an architectural standpoint, but will take any useful information. Links, control suggestions - anything you have, I'll happily listen to.

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  • Calculate initial velocity of a 3d vector-based projectile

    - by Frotty
    Okay, so I got a Projectile with 2 Vectors, position and velocity. I now want to calculate the initial velocity for it in order to reach a specific point on the map. Or actually, how high has the start z-velocity to be (because x and y are probably defined by a speed variable) in order for the projectile to hit the marked position. The projectile is influenced by a constant gravity vector. All calculations are done 32 times per second. I want this, because I don't want to use a parabola function, so the projectile can still be influenced by other sources, simply adding some velocity. I didn't really find anything referring to that topic and would be glad for every helping answer, Thanks.

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  • display port on x230 not workgin

    - by Aaron
    having problems with my new lenovo x230 - using dual montiors, only vga registers anything. This has the Intel graphics controller : 00:02.0 VGA compatible controller: Intel Corporation Ivy Bridge Graphics Controller (rev 09) TO get it to even boot, had to add the nomodeset parameter to the kernel. Otherwise will not even start up X Ive upgraded my kernel to the latest 3.6 with no difference. The display section reads the monitor as the only display and labels it as laptop. Cant seem to get it to work! Any help would be greatly appreciated.

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  • Google search preview shows content not on the website

    - by SDG
    My website google search entry is messed up. In the preview in google search results, I get things like cracks, serials, random ip addresses. I scanned all files and my computer for viruses and malware and could not find anything. I also tried to download and reupload all content from a friend's computer and still that content persists. I also scanned the source code of all files, but the content does not appear in any file. Google also does not detect any malware on the website, as seen in their webmaster tools. I have searched using the same keywords in other search engines such as bing and yahoo and the search results there are fine. I am quite clueless as to what the causes would be for this and what would be a possible remedy.

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  • What is the SEO-recommended method for using underscores and dashes in URLs that contain geographic locations?

    - by ElHaix
    In reading through this article: In Subfolder & File Names, Use Dashes, Not Underscores Good: Good: http://www.domain.com/sub-folder/file-name.htm Bad: http://www.domain.com/sub_folder/file_name.htm In my URL's, I may have one or two city names, ending with the province/state: Burnaby_New_Westminister-BC/[some search term]. My URL rules currently are defined such that everything after the dash is the prov/state. Some geographic locations already contain dashes: Notre-Dame-de-Grâce (in QC), which I would convert to ~/Notre_Dame_de_Grace-QC/ I thought of placing the prov/state after another "/", however in some cases the province/state name may not exist, thus ~/Notre_Dame_de_Grace/, so the first term after the domain name contains the geo location {city, city_name-state}. I am now revisiting this, and wondering if this rule set should change, and if so, what is the recommended way of implementing this? -- UPDATE -- After reviewing this video, I see that I should be using the dashes, rather than underscores. However since I still want to have my geo locations in the first URL section, is there anything wrong with using a double-dash separator - ie: /city-name--state/ ?

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  • Startup value for Win7

    - by Mike
    Problem at a glance: For Win 7, Ubuntu One changes the startup value to enabled whenever I run it More Details: If I change the startup value in: Control Panel System and Security Administrative Tools System Configuration Startup to disabled for Ubuntu One (since I don't want it to start when I log on), it succesfully stops Ubuntu One from starting at logon However, if I start the Ubuntu One manually, it changes the above startup value to enabled. Is there a way to prevent Ubuntu One from changing its startup value? I want it to stay disabled. I haven't found anything relevant in Ubuntu One's settings dialog.

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  • why does my lubuntu recognizes only lubuntu instalation cds?

    - by Hardi
    I installed lubuntu from alternate cd a month ago. Now when I needed to read some cd's, the cd try won't open. It can be opened before ubuntu boots up. It can be opened after entering sudo eject -i off from console. But it won't mount any other cd-roms, than just the lubuntu live-cd and lubuntu alternate instal cd, where it was installed from. "mount: no medium found on /dev/sr0" as output, when try to mount anything else. Problem can't be in corrupted sd's, because othe computer, did recognize them well.

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  • 12.04 Dell GX260 resolution for 82845G/GL will not go greater than 1024x768

    - by Steve M
    I am a newbie to Linux and have installed 12.04 on to an old Dell GX260, I was hoping that I could slowly extract myself from Microsoft - but unless I can fix this simplest of problems I am thinking that this version of Linux is not ready for me yet!! I have read various posts but none seem to match, I believe the driver is installed, but under displays the maximum allowed in the drop down box is 1024x768 (4:3) display is unknown and detect displays does nothing. I have loaded all updates available but still no fix. xrandr shows: VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.0* 800x600 60.3 56.2 848x480 60.0 640x480 59.9 xrandr --addmode VGA1 1360x768 cannot find mode "1360x768" anything above 1024x768 can not be found, but then I could be doing this out of step!!

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  • Move site to new domain divided by language across subdomains

    - by mark
    I managed to find a nice domain for a fairly fledgling site of mine that actually hasn't been parked by scumbag squatters. Given the upcoming move I'm thinking I'd take the opportunity to split the content across subdomains according to language, much like wikipedia for example: current: www.old-domain.com/en/subject # English www.old-domain.com/subjecto # Spanish (default so not locale in url) proposed en.new-domain.com/subject es.new-domain.com/subjecto The advantage of doing this is a fairly competitive keyword such that I may wish to put a copy of my application on a Spanish slice in order to gain a few serp's. Also pure vanity. Google's webmaster tools allows me to move to the new domain and I can add the root domain and the subdomains but forward to only one. I'll 301 from the old domain appropriately but is there anything I should know about webmaster tools in this respect where effectively I'm moving to two addresses? (Feel free to dissuade me from doing this if it's a bad idea in comments.) I've now asked this same question on google's forums.

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  • How to prepare for the GRE Computer Science Subject Test?

    - by Maddy.Shik
    How do I prepare for the GRE Computer Science subject test? Are there any standard text books I should follow? I want to score as competitively as possible. What are some good references? Is there anything that top schools like CMU, MIT, and Standford would expect? For example, Cormen et al is considered very good for algorithms. Please tell me standard text books for each subject covered by the test, like Computer Architecture, Database Design, Operating Systems, Discrete Maths etc.

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  • How long till HTML5 canvas becomes a viable game development platform?

    - by Shouvik
    So I have been working on web application. So invariably what it boils down to is making simple games which were previously based on flash or openGL. Now I know apple was moving away from flash because its proprietary unlike their stance that its got "pathetic performance"! Not true, try playing a canvas game, I can assure you at any point of time (including when its idle) it will use up a fair bit of processing power just to redraw the UI. Now I do understand that this is my fault because when the game is not active I should not be redrawing the canvas, but honestly its a lot of work and I suppose there should be libraries which should be able to assist me with that! So, how much will it be before I see a decent canvas library which handles these "tiny" issues for me? I can't honestly expect Steve Jobs to be doing anything more for HTML5! I someone knows of a good library, I am all ears...! :) PS: I use mootools and am presently using Mootools Canvas Library.

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  • KeyTouch remaps the delete key

    - by Robert Gowland
    I installed KeyTouch, but it decided that the delete key should be the KeyTouch hot key. So, when I pressed deleted, KeyTouch came up. Next I uninstalled KeyTouch and now the delete key doesn't do anything. Is there any way to remap the delete key to actually delete? Notes: I tried reinstalling KeyTouch, and the same thing happens. KeyTouch does not allow the user to map the delete key. EDIT xev shows keycode 119 when I press the delete key xmodmap shows keycode 119 mapped to Delete NoSymbol Delete running xmodmap -e "keycode 119 = Delete" from the command line does not resolve the issue

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  • Samba user does not have folder read permission

    - by user289455
    I have set up a special user for read only samba shares. I set him up in Samba and as a system user. I shared a couple of folders but that user cannot access them. I know samba is working because I also shared them with the main user of the system which is an admin account and it works fine. How can I allow this user to have read permissions on all the directories I want to share without changing anything for any other users of the system? For example, I don't want to give him ownership of any of the files/directories. Just ongoing recursive read access. ongoing recursive is important. If someone adds a file or directory, I still want him to automatically be able to read it.

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  • I want to access internet on ubuntu 12.04.1 guest system from windows 7 64bit host in virtualbox 4.1.18 How to do so?

    - by Rohit
    I am using Windows 7 64bit as host system and i have installed ubuntu 12.04.1 in virtual box as stated above. I have a dsl connection which works well on my host system and now I need to access the same connection on my guest ubuntu. I cant see any such settings in ubuntu. I am total biginner and dont know anything about linux. Win 7 is showing unknown network. Please guide me from the scratch. Thank you.

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  • "Errors while handling" kernel packages after dist-upgrade

    - by WOLF L?MBERT
    I did an apt-get dist-upgrade, now everytime I do something using apt-get, e.g. installing something, it gives me that there are errors while handling the following packages: linux-image-extra-3.13.0-35-generic linux-image-generic linux-generic My system still works correctly, but is this normal? And what should I do? Should I do anything? Have I done the wrong thing by doing a dist-upgrade? (Beginner-like instructions please, I'm not an expert. Using Xubuntu 14.04.)

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  • Radeon HD4850 card, ubuntu 12.04.1 LTS Installed FGLRX drivers, but still running vesa, how to solve it?

    - by user113416
    I have ati HD4850 card, ubuntu 12.04.1LTS. To begin with, after fresh instll, i installed fglrx drvers from system -- additional drivers, according to fglrxifo everything was alright, but the system was running on vesa:sem. After that, i have reinstalled and installed drivers according to many tutorials, but stille got that problem. one of the tutorial was here: What is the correct way to install ATI Catalyst Video Drivers (fglrx)? of course, i attempted to install 12.6 driver Now i have a fresh install of ubuntu and don't want to touch anything without anyone's support, because my 3 days nightmare didn't give results. what must i do to have an adequate performance of video card? Thanks in advace.

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  • Trying to boot from USB on Asus q200e-bhi3t45 just brings me to grub menu

    - by Krash Kharma
    It's been a struggle every time I've tried to change my OS on this machine. I honestly don't even know how it works whenever it does. I've somehow managed to get Windows 7, Windows 8, Mint 14, Ubuntu 12.04, and 12.10 to work at random times but it's always after struggling with it and googling for random chance fixes and suddenly something clicks and it loads from usb, but 99% of the time, every time I try to boot from USB to install a distro (in this case, I'm trying to get ubuntu-12.04.2-desktop-amd64.iso to work) my pc just comes up with a grub menu ("Minimal bash-like blahblahblah - grub ") I don't know why it works when it works. Right now I've tried everything from with/without Fast Boot in BIOS, with/without CSM, with/without secure boot, to changing BOOTx64.EFI to bootx64.efi to downloading a new bootx64.efi to copying it to every folder on the usb.... It makes no sense to me. Sorry if this has been asked before but I can't find anything

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  • https (SSL) instead of http

    - by user1332729
    I am building myself a new website, out of privacy and security concerns I am contemplating trying to make it https only. It will be mobile-friendly using media queries but I am concerned--especially for mobile users--about the increased bandwidth. How much will doing so increase my bandwidth or slow load times? For pages where I'm not transferring sensitive information, should I leave external links (to a jQuery library, or a web font for instance) in http? Simply put, I have read articles saying the entire web would be more secure if everything was SSL but my actual knowledge of implementation is limited to payment gateways and log-in pages and such. I apologize for the open-ended nature of the question but anything, even just simple answers to the specific questions is welcomed.

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  • Will keep google traffic on new site from old site when moving content from old site? [closed]

    - by user1324762
    Possible Duplicate: new domain, old links are 301’d from old domain to new, how will this affect my rankings? I have a site about bikers. Now I created a dating site for bikers. I don't need old site any more, I want to move all articles to this new dating site. So basically, this is not only moving content to new domain, but also to entire new site. What I am planning to do is to make 301 redirect for all 200 articles. For pages that are not articles, I will just put message that the site will be down soon. Do you think that I will get all google traffic from old site from those articles? Is there anything I should be aware and careful?

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  • Internet TV streaming applications

    - by mark kirby
    Are there any programs for Ubuntu that can pull TV streams from the Internet ? For example like on a blu-ray player you get BBC iplayer and hulu and youtube as apps, so is there an application that can do this ? I know XMBC can but its to fiddly and resource hungry, I just want the net TV apps and not the full media center. Boxee was great for this, it was a media center but had an interface for the apps not just sticking them in some strange menu like XBMC. Please let me know of anything you know of

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  • How to build completely modular web applications

    - by Webnet
    In the coming months we're going to begin a project where we take a system we've built for a client (v1) and rebuild it from scratch. Our goal with v2 is to make it modular, so that this specific client will have their own set of modules they use, then another client may use a different set of modules altogether. The trick here is that Company A might have a series of checkout and user modules that change how that system works. Company B might stick with the standard checkout procedure but customize how products are browsed. What are some good approaches to application architecture when you're building an application from scratch that you want to have a Core that's shared among all clients while still maintaining the flexability for anything to be modified specifically for a client? I've seen CodeIgniter's hooks and don't think that's a good solution as we could end up with 250 hooks and it's still not flexible enough. What are some other solutions? Ideally we won't need to draw a line in the sand.

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  • How to use database to generate multiple folder content page? [migrated]

    - by VenomVipes
    Scenario :I am trying to build a Mobile Entertainment Portal. It will enable users to download Music & Movies to their Cell Phones... Problem Exp : Suppose I upload 100 folders of Songs, each folder is for one Album. I want a way to generate a page with all the folders name (Album Name) in it. If user click on the page, they should be taken to a page where they get list of all songs in the album. Clicking on any song name will let them download it. Can it be done anyway or will I have to manually design each of the 3 pages for each album. If I do that, its time consuming and also will be difficult to change anything like footer, header...

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  • What is the concept behind writing a cancel operation in c++?

    - by ToMan
    I'm attempting to write a cancel operation for a software download application. This application will first transfer the software to the device and then install the software on it. (These are givens I'm not allowed to change). What should the cancel operation do? When a user presses 'cancel', the application should stop transferring/installing the software immediately. Question: Since I've never written a "cancel" function, I'm wondering what are the types of things to consider when writing the code, and what are the common bugs I should expect and how to deal with them? Couldn't find anything in google so if you have some links that would be good reads I'd really appreciate it since I'm not looking for answers I'm just looking for guidelines/macro/concept help

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