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  • SCORM and the Learning Management System (LMS)

    What actually is SCORM? SCORM, Shareable Content Object Reference Model, is a standard for web-based e-learning that has been developed to define communication between client-side content and a runti... [Author: Stuart Campbell - Computers and Internet - October 05, 2009]

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  • How to check if two System.Drawing.Color structures represent the same color in 16 bit color depth?

    - by David
    How can I check if two System.Drawing.Color structures represent the same color in 16 bit color depth (or generally based on the value of Screen.PrimaryScreen.BitsPerPixel)? Let's say I set Form.TransparencyKey to Value1 (of Color type), I want to check that when the user selects a new background color for the form (Value2), I don't set the entire form transparent. On 32bit color depth screens I simply compare the two values: if (Value1 == Value2) However, this does not work on 16bit color depth screens, as more Color values for the Value2 would represent the same actual 16bit color as Value1, as I found out the hard way.

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  • Unknown file system : grub Rescue

    - by Rahul Rodrigues
    I have Lenovo Y560 Laptop on which installed Windows 7 and Ubuntu 11.10 as dual boot.Due to some reason i had to recover boot loader using bootrec.exe /fixmbr and bootrec.exe /fix boot,It created one partition of size 198MB named "tet" and my both os were working fine. Ysterday while making some changes in partition table i deleted that "tets" partition and after reboot im getting following error Error:unknow filesystem grub rescue i tried to boot from windows installer cd and but it stucks at "starting windows" so not able to run commands which i have mentioned earliar and tried to boot from Ubuntu 11.10,it stucks after showing following error memory full can't kill anymore process. Please help me out

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  • Hosting a WCF Service Lib through a Windows service get a System.InvalidOperationException: attempti

    - by JohnL
    I have a WCF Service Library containing five service contracts. The library is hosted through a Windows Service. Most if not all my configuration for the WCF Library is declaritive. The only thing I am doing in code for configuration is to pass the type of the class implementing the service contracts into ServiceHost. I then call Open on each of the services during the Windows Service OnStart event. Here is the error message I get: Service cannot be started. System.InvalidOperationException: Service '[Fubu.Conversion.Service1' has zero application (non-infrastructure) endpoints. This might be because no configuration file was found for your application, or because no service element matching the service name could be found in the configuration file, or because no endpoints were defined in the service element. at System.ServiceModel.Description.DispatcherBuilder.EnsureThereAreNonMexEndpoints(ServiceDescription description) at System.ServiceModel.Description.DispatcherBuilder.InitializeServiceHost(ServiceDescription description, ServiceHostBase serviceHost) at System.ServiceModel.ServiceHostBase.InitializeRuntime() at System.ServiceModel.ServiceHostBase.OnBeginOpen() at System.ServiceModel.ServiceHostBase.OnOpen(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open(TimeSpan timeout) at System.ServiceModel.Channels.CommunicationObject.Open() at Fubu.RemotingHost.RemotingHost.StartServ... protected override void OnStart(string[] args) { // Uncomment to debug this properly //System.Diagnostics.Debugger.Break(); StartService1(); StartService2(); StartService3(); StartService4(); StartService5(); } Each of the above simply do the following: private void StartSecurityService() { host = new ServiceHost(typeof(Service1)); host.Open(); } Service Lib app.congfig summary <services> <service behaviorConfiguration="DefaultServiceBehavior" name="Fubu.Conversion.Service1"> <endpoint address="" binding="netTcpBinding" bindingConfiguration="TCPBindingConfig" name="Service1" bindingName="TCPEndPoint" contract="Fubu.Conversion.IService1"> <identity> <dns value="localhost" /> </identity> </endpoint> <endpoint address="mex" binding="mexTcpBinding" bindingConfiguration="" name="mexSecurity" bindingName="TcpMetaData" contract="IMetadataExchange" /> <host> <baseAddresses> <add baseAddress="net.tcp://localhost:8025/Fubu/Conversion/Service1/" /> </baseAddresses> </host> </service> ... Contract is set up as follows: namespace Fubu.Conversion.Service1 { [ServiceContract(Namespace = "net.tcp://localhost:8025/Fubu")] public interface IService1 { I have looked "high and low" for a solution without any luck. Is the answer obvious? The solution to this does not appear to be. Thanks

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  • Rails and Mongoid best way to implement sharing system

    - by Matteo Pagliazzi
    I have to model User and Board in rails using mongoid as ODM. Each board is referenced to an user through a foreign key user_id and now I want to add the ability to share a board with other users. Following CRUD I'd create a new Model called something like Share and it's releated Controller with the ability to create/edit/delete a Share but I have some doubts: First, where to save informations about Shares? I think I may create a field in the Board's collection called shared_with including an array of user ids. in a MySQL I'd created a new table with the ids of who share, the resource shared and the user the resources is shared with but I don't think that's necessary using MongoDB. Every user a Board is shared with should be able to edit the Board (but not to delete it) so the Board should have two relations one with the owner and another with the users the board is shared with, right? For permission (the owner should be able to delete a board but the users it is shared with shouldn't) what to use? I'm using Devise for authentication but I think something like CanCan would fit better. but how to implement it? What do you think about this way? Do you find any problems or have better solutions?

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  • problems updating system with apt-get

    - by Javier
    After to do apt-get update and try with apt-get upgrade I have the next error message: This is a coppy of my terminal (in spanish) root@LinuxJGP:/home/javiergp# apt-get upgrade Leyendo lista de paquetes... Hecho Creando árbol de dependencias Leyendo la información de estado... Hecho Se actualizarán los siguientes paquetes: apport apport-symptoms fonts-liberation gnome-icon-theme gnome-orca language-pack-en language-pack-en-base language-pack-es language-pack-es-base language-pack-gnome-en language-pack-gnome-en-base language-pack-gnome-es language-pack-gnome-es-base light-themes linux-firmware oneconf resolvconf sessioninstaller software-center ssl-cert tzdata ubuntu-docs ubuntu-keyring ubuntu-sso-client ubuntuone-control-panel ubuntuone-installer unity-lens-video unity-scope-video-remote xdiagnose 29 actualizados, 0 se instalarán, 0 para eliminar y 0 no actualizados. E: Los archivos de índice de paquetes están dañados. No existe un campo «Filename:» para el paquete ubuntu-keyring. How can resolve this problem?

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  • Where to find iPhone system buttons and icons graphics?

    - by Ariel
    Hey guys, I'm trying to find a way to use the original Apple system buttons and icons in a web site. Is there a way to get these original graphics in png format? There are not-so-nice ways to obtain them of course. Two I was thinking of: Save them from this link, then convert to png. Take screen captures on the iPhone itself, and cut the icons from the saved images. Is anyone aware of a nicer way to obtain the original graphics? Does anyone know where they are stored on the Mac? Thanks :-) Ariel

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  • System Wide Performance Sanity Check Procedures

    - by user702295
    Do you need to boost your overall implementation performance? Do you need a direction to pinpoint possible performance opportunities? Are you looking for a general performance guide? Try MOS note 69565.1.  This paper describes a holistic methodology that defines a systematic approach to resolve complex Application performance problems.  It has been successfully used on many critical accounts.  The 'end-to-end' tuning approach encompasses the client, network and database and has proven far more effective than isolated tuning exercises.  It has been used to define and measure targets to ensure success.  Even though it was checked for relevance on 13-Oct-2008, the procedure is still very valuable. Regards!  

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  • A certain flash application causes a system crash

    - by noobermin
    It's no surprise I guess. Go here to try it! http://www.belgeler.com/blg/2hni/griffiths-introduction-to-electrodynamics-3-ed-solutions-manual It's wonderful, after a few seconds, top shows that our good friend plugin-container takes 83% of the physical memory (8 GB) before everything freezes and the PC doesn't respond. I'm using Ubuntu 12.04 and I have an nvidia (GTS 250) card with the "post-release updates" version of the driver. OFFTOPIC: Yes, it's the solutions manual. I'm self-studying so I don't have a professor to check my work. Please don't judge me :)

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  • IVR-style dialog system / workflow / menu

    - by unbeli
    I need to build a dialog system similar to IVR used in call centers. My system is not phone-based, but the dialog is similar. Something like System: "Main menu: Enter [1] for menu1, [2] for menu2" User: [1] System: "menu1: enter [1] for apples, [2] for oranges, [3] for main menu" User: [7] System: "What??" System: "menu1: enter [1] for apples, [2] for oranges, [3] for main menu" User: [2] ... and so on I want to have a nice declarative description of all the possible options and a nice way to run through that tree, guided by user input. Already considered: ANTLR-generated lexer/parser (seems to be an overkill), SCXML-based state machine (seems like only transitions can be declared, the rest needs to be coded)

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  • C library build system dependencies

    - by Ninefingers
    Hello all, This debate has cropped up on a mailing list for a project I'm involved in. Unfortunately we're quite a small bunch at the moment, so I want to ask a wider audience. We're writing a C library (for arbitrary precision arithmetic) and are investigating build systems. Currently we have a bash script in desperate need of work. I believe we can't use autotools etc due to licensing (bsd vs gpl). So I suggested we use a modern scripting language like python or perl. The question is: is having something like perl or python around at build time an unrealistic dependency on Unix-like platforms these days?

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  • A System Monitoring Tool Primer

    <b>CertCities:</b> "Linux comes with a number of utilities that can be used to monitor one or more of these performance parameters. The following sections introduce a few of these utilities and show how to understand the information presented by them"

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  • Developing a php system that tracks other websites analytics

    - by CodeCrack
    I want to develop a PHP website feature where users sign up, get a javascript snippet code that display an image on their site, and let's me track the number of visitors, unique hits, clicks and average visitor duration on their page. Is that something that should be done with some open source analytic software such as http://piwik.org/ or it's pretty doable on your own? If I had to do it myself from scratch, I would use image/pixel as a way to track the visit, drop a cookie with javascript snippet to track uniques, track clicks based on image click and redirect, and not sure about the bounce rate. Any thoughts or opinions are welcome.

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  • Roll Your Own Passive 3D Movie System with Dual Projectors

    - by Jason Fitzpatrick
    If you’d like to enjoy 3D movies with passive polarized glasses for less than $50,000 (the average price of a passive 3D projector), this DIY setup brings the price down to a more accessible level. Courtesy of 3D movie and theater enthusiast Jahun, this guide details how you can achieve passive 3D projection using two radically less expensive projectors, cheap polarized filters, and some software. The project won’t be free-as-in-beer but with some careful shopping the bill will ring up at the thousands instead of tens-of-thousands of dollars. Hit up the link below to see how he pulled off miming a $50,000 projector for less than a tenth the cost. Passive Projection [via Hack A Day] How to Get Pro Features in Windows Home Versions with Third Party Tools HTG Explains: Is ReadyBoost Worth Using? HTG Explains: What The Windows Event Viewer Is and How You Can Use It

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  • Cannot boot into system after deleting partition

    - by Clayton
    Okay...so this was kind of a stupid thing for me to do now that I think back on it. I was experiencing a ton of lag and not as much memory that I could use after installing Ubuntu 12.04. So after remembering I had installed multiple server versions of Ubuntu 12.04 by mistake, I went into Disk Management and proceeded to delete each and every one. Everything went fine. Up until this week, I have not experienced any problems. But starting yesterday I began to get lag just as I had before, and nothing fixed the problem. I decided to remove the Ubuntu partition, since I was also experiencing a visual error when given the option to select one to boot(the screen doesn't come up at all, and I recieved a monitor resolution error instead, but could still access both Windows and Ubuntu via arrow keys). After deleting the Ubuntu partition, so that I could see if running just Windows would fix the problem, I proceeded with what I was doing, installing a few programs that were not tied to my prediciment in any way. Upon rebooting my desktop, however, I recieved the following error: error: unknown filesystem. grub rescue> Hoping I could boot into Ubuntu via a pendrive and possibly backup my important files and wipe the hard drive to start fresh, I installed Ubuntu 13.04, but even that does not boot. Instead, I get this message on a terminal screen: SYSLINUX 4.06. EDD 4.06-pre1 Copyright (C) 1994-2011 H. Peter Anvin et al ERROR: No configuration file found No DEFAULT or UI configuration directive found! boot: So more or less, my desktop is screwed. I need to be able to get to the files inside because of my job as an artist, as well as retrieve my documents for my stories stored on Windows. Once I can succeed in solving this once and for all, I know for a fact I will stick to Ubuntu only, and install what is required to be able to run any Windows applications I used to use or need to use. I would rather not reformat the hard drive, and if I need to, it is a last resort. And I doubt I can use a Windows Recovery Disk to get my files back, as my mom has thrown out a lot of the installation disks and paperwork I would need to even follow through with that. :\ Keep in mind that I am a novice/newbie when it comes to Linux, but am hoping ot become better at it as time goes by. I appreciate any help you guys can give me. This will probably be the last time I attempt to do anything that could risk the well-being of my PC. (I've also looked through various questions on the site and tested a lot of the solutions. None seem to have worked.)

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  • System hang when using SSHFS

    - by Borivoje Petrovic
    This is just a quick note that I want to share with others. It is about the problem that I encountered with my office machine. It was hanging continuously when ssh mount was used. The main problem is, as I assumed, the termination of ssh session, which caused the sshfs not to respond. The solution for this issue is the ServerAliveInterval 60 directive in /etc/ssh/ssh_config file. Hope this someone help!

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  • How to Back Up Your Linux System With Back In Time

    - by Chris Hoffman
    Ubuntu includes Déjà Dup, an integrated backup tool, but some people prefer Back In Time instead. Back In Time has several advantages over Déjà Dup, including a less-opaque backup format, integrated backup file browser, and more configurability. Déjà Dup still has a few advantages, notably its optional encryption and simpler interface, but Back In Time gives Déjà Dup a run for its money. How to Sync Your Media Across Your Entire House with XBMC How to Own Your Own Website (Even If You Can’t Build One) Pt 2 How to Own Your Own Website (Even If You Can’t Build One) Pt 1

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  • What is the default file system of /var/run, /var/lock

    - by Casey
    Trying to figure out if my /var/run is using disk or not. See the command output: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg0-root 40G 15G 26G 36% / none 3.9G 340K 3.9G 1% /dev none 3.9G 1.1M 3.9G 1% /dev/shm tmpfs 3.9G 600K 3.9G 1% /tmp none 3.9G 452K 3.9G 1% /var/run none 3.9G 0 3.9G 0% /var/lock none 3.9G 0 3.9G 0% /lib/init/rw /dev/md0 236M 59M 165M 27% /boot /dev/mapper/vg0-home 60G 58G 2.3G 97% /home

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  • How to enable ajax when deriving from System.Web.UI.WebControls.WebControl on controls that are crea

    - by Dave
    I've built a class that derives from System.Web.UI.WebControl. It basically renders pagination links (same as what you see on top of GridView when enabled) for use above a repeater. I'm creating some anchor tags explicitly inside my nav control obviously, but they don't perform ajax postbacks. My understanding is that ajax requires POSTS to work right? Well, these would be GETs which I think is the problem. Is there a way to achieve what I'm trying to do? Thanks!

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  • HTG Explains: What AppArmor Is and How It Secures Your Ubuntu System

    - by Chris Hoffman
    AppArmor is an important security feature that’s been included by default with Ubuntu since Ubuntu 7.10. However, it runs silently in the background, so you may not be aware of what it is and what it’s doing. AppArmor locks down vulnerable processes, restricting the damage security vulnerabilities in these processes can cause. AppArmor can also be used to lock down Mozilla Firefox for increased security, but it doesn’t do this by default. How to Use an Xbox 360 Controller On Your Windows PC Download the Official How-To Geek Trivia App for Windows 8 How to Banish Duplicate Photos with VisiPic

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  • Recommended total system backup solution

    - by bioShark
    I hope this question won't get closed immediately since it has a generic title. I already searched a bit around the answers here, but nothing satisfied me. I want a back-up solution that makes a total back-up, so that I can restore my Ubuntu in case of major failures, like HDD failing. As far as I can see, I have 2 choices: 1) Backing up with Deja Dup to an external disk. This is fine and I am already doing, but in case my HDD fails, and I make a new Ubuntu install on a new disk, will Deja Dup be able to restore all my setting and stuff from the backed up files? If it can, then what other files/folders should I add in Deja Dup to back-up (currently I have set only the recommended /home folder)? Is there a point in telling Deja Dup to back-up everything under "/" ? 2) A disk/partition cloning software. This would be something similar to Noton ghost. Is there such a software with nice GUI that you could recommend for Ubuntu? And even better, it would be nice if Ubuntu's liveCD could recognize such a clone at install step. I am using 11.10

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  • Ubuntu 12.10 automatic logout

    - by anthony
    I just had a new desktop constructed and installed ubuntu 12.10 which was successful for the most part but every time I open up some applications like thunderbird I get automatically logged out and all my windows are closed. System error messages also come up from time to time. Also I'm not sure if this helps but if I select the "Use system title bar and borders" in chromium I will also get logged out and from that point won't be able to use it without getting logged out in the future. If I click on particular links as well. If anyone has any tips on how I can isolate and fix the problem I would greatly appreciate it.

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  • Windows no longer boots on dual-boot system

    - by N Alex
    While trying to delete an Ubuntu partition from my hdd I accidentally rebooted my computer. (Note: the partition was originally made from an existing partition using paragon.) After that when I tried to start the computer I got the GRUB rescue terminal prompt. I wasn't able to do much from that, but I did manage to boot Ubuntu from a USB drive and to run boot-repair. But now when I try to select Windows 7 from the boot selection menu I get the error 0xc0000225. Here is the link to the BootInfo summary created by boot-repair: http://paste.ubuntu.com/1032584/ I have a lot of very important data on my hdd and I would really appreciate your help.

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