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• Ubuntu 64bit Xen DomU Issues after upgrade from Karmic to Lucid

  - by Shoaibi

  I was upgrading my servers today and it all went fine except the last machine which has the following issues: [Resolved using http://www.ndchost.com/wiki/server-administration/upgrade-ubuntu-pre-10.04#post-1004-upgradefinal-steps] No login prompt on console Done. Begin: Mounting root file system... ... Begin: Running /scripts/local-top ... Done. [ 0.545705] blkfront: xvda: barriers enabled [ 0.546949] xvda: xvda1 [ 0.549961] blkfront: xvde: barriers enabled [ 0.550619] xvde: xvde1 xvde2 Begin: Running /scripts/local-premount ... Done. [ 0.870385] kjournald starting. Commit interval 5 seconds [ 0.870449] EXT3-fs: mounted filesystem with ordered data mode. Begin: Running /scripts/local-bottom ... Done. Done. Begin: Running /scripts/init-bottom ... Done. Also tried by pressing ENTER and CTRL+C many times, no use. Resolved: [/tmp was mounted as noexec, changing that fix it]: I get errors when i try to re-install udev in single user mode: Unpacking replacement udev ... Processing triggers for ureadahead ... ureadahead will be reprofiled on next reboot Processing triggers for man-db ... Setting up udev (151-12.1) ... udev start/running, process 1003 Removing `local diversion of /sbin/udevadm to /sbin/udevadm.upgrade' update-initramfs: deferring update (trigger activated) Processing triggers for initramfs-tools ... update-initramfs: Generating /boot/initrd.img-2.6.32-25-server /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-premount/fixrtc: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-premount/ntfs_3g: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-premount/resume: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/nfs-top/udev: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/panic/console_setup: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-top/all_generic_ide: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-top/blacklist: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-top/udev: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/init-bottom/udev: Permission denied /usr/sbin/mkinitramfs: 329: /tmp/mkinitramfs_yuuTSc/scripts/local-bottom/ntfs_3g: Permission denied

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• how to remove update repo that always fails

  - by David M. Karr

  A week or so ago I tried to add a new package repo that supposedly had a package I wanted. Unfortunately, the information about it was out of date, and I found that it fails to connect to it each time. I'd like to just remove the new repo, but I'm not sure how to do that. For context, when I update, I get this: W:Failed to fetch http://ppa.launchpad.net/geod/ppa-geod/ubuntu/dists/precise/main/source/Sources 404 Not Found [IP: 135.214.42.30 8080] , W:Failed to fetch http://ppa.launchpad.net/geod/ppa-geod/ubuntu/dists/precise/main/binary-amd64/Packages 404 Not Found [IP: 135.214.42.30 8080] , W:Failed to fetch http://ppa.launchpad.net/geod/ppa-geod/ubuntu/dists/precise/main/binary-i386/Packages 404 Not Found [IP: 135.214.42.30 8080] , E:Some index files failed to download. They have been ignored, or old ones used instead.

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• Coming from Win XP to 7 and having new accessibility software problems

  - by Anonymous Jones

  I just switched from Windows XP Pro SP3 (32bit) to Windows 7 Ultimate (32bit) on a new PC. Now, both the new onscreen keyboard and a utility for sending mouse clicks are being problematic. The problem with 7's OSK is that some things I type only work intermittently or just dodgily. Like Alt+Tab with multiple Tabs, other Alt/Ctrl/Shift/Win key combinations, and the context menu key. Sometimes apps will not take focus for input at all. I use the OSK it in 'hover' mode, on 0,5 seconds. The clicking tool is Point-N-Click, which sends clicks when I dwell anywhere for 1.25 seconds with the mouse pointer. http://www.polital.com/pnc/ The problem with it is that sometimes it fails to click. Most often this happens in some of the control panel sections, on the taskbar, and when UAC pops up. It seems to occur in conjunction with OSK usage a bit too, I think. I'm using an Administrator account. DEP and UAC settings are default. What can I do to fix or work around either of these problems? I'm disabled so this really is killing usability.

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• Where can I find accessible bug/issue databases with complete revision history

  - by namenlos

  I'm performing some research and analysis on bug/issue tracking databases and more specifically on how programmers and teams of programmers actually interact with them. What I'm looking for involves understanding how those databases change over time. So what I don't need for example: is a database of all the bugs of some open source project as the bugs exist today. What I do need is a complete set of revision history for every issue/bug in the database. This would enable me to pick a specific datetime and say here were the list of all the issues/bugs that existed at that moment in time. Anyway know of some publicly accessible issue/bug databases that expose this revision data? Ideally, the revision would look something like this (shown for a single bug, with two revisions) ISSUEID PRI SEV ASSIGNEDTO MODIFIEDON VALIDUNTIL 1 2 2 mel apr-1-2010:5pm apr-1-2010:6pm 1 2 3 steve apr-1-2010:6pm NULL

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• What good Social Networking Site solutions there are? [closed]

  - by ZetsubouWebmaster

  What good and free Social Networking Site solutions there are? I tried many options but most of them are either too complicated, too simple, or just do not work... I tried: Dolphin, DZOIC-Handshakes, elgg, Oxwall, SocialEngine, and some plugins for wp and other CMS. I don't need much, just: groups, chats, forums, profiles, PM, photos, pages, comments, search, statistics. Most of which included in pretty much every CMS out there, but not all.. So, what good solutions there are? Also I don't mind paying some money (I guess no more then $200), but I'd prefer if it was a free open source engine. Of course it should be PHP+MySQL based.

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• Tool to Save a Range of Disk Clusters to a File

  - by Synetech inc.

  Hi, Yesterday I deleted a (fragmented) archive file only to find that it did not extract correctly, so I was left stranded. Fortunately there was not much space free on the drive, so most of the space marked as free was from the now-deleted archive. I pulled up a disk editor and—painfully—managed to get a list of cluster ranges from the FAT that were marked as unused. My task then was to save these ranges of clusters to files so that I could examine them to try to determine which parts were from the archive and recombine them to attempt to restore the deleted file. This turned out to be a huge pain in the butt because the disk editor did not have the ability to select a range of clusters, so I had to navigate to the start of each cluster and hold down Ctrl+Shift+PgDn until I reached the end of the range (which usually took forever!) I did a quick Google search to see if I could find a command-line tool (preferably with Windows and DOS versions) that would allow me to issue a commands such as: SAVESECT -c 0xBEEF 0xCAFE FOO.BAR ::save clusters 0xBEEF-0xCAFE to FOO.BAR SAVESECT -s 1111 9876 BAZ.BIN ::save sectors 1111-9876 to BAZ.BIN Sadly my search came up empty. Any ideas? Thanks!

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• Shumway : Mozilla lance son implémentation JavaScript et HTML5 de Flash, les démos du projet disponibles

  Shumway : Mozilla lance son implémentation JavaScript de Flash les utilisateurs peuvent tester le projet open source basé sur les technos du Web Même si HTML5 est vu comme un remplaçant de Flash, il existe encore une grande quantité de contenu Flash sur le Web. Pour permettre le rendu de ces contenus sans avoir besoin du lecteur Flash Player, Mozilla a lancé le projet Shumway. Shumway est une machine virtuelle écrite en JavaScript, couplé avec les technologies HTML5, qui permet le rendu des fichiers SWF sans avoir besoin de Flash Player. Shumway est construit avec deux objectifs principaux selon un billet de blog de Mozilla : faire avancer le Web ouvert en toute séc...

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• UppercuT v1.0 and 1.1&ndash;Linux (Mono), Multi-targeting, SemVer, Nitriq and Obfuscation, oh my!

  - by Robz / Fervent Coder

  Recently UppercuT (UC) quietly released version 1 (in August). I’m pretty happy with where we are, although I think it’s a few months later than I originally planned. I’m glad I held it back, it gave me some more time to think about some things a little more and also the opportunity to receive a patch for running builds with UC on Linux. We also released v1.1 very recently (December). UppercuT v1 Builds On Linux Perhaps the most significant changes to UC going v1 is that it now supports builds on Linux using Mono! This is thanks mostly to Svein Ackenhausen for the patches and working with me on getting it all working while not breaking the windows builds!  This means you can use mono on Windows or Linux. Notice the shell files to execute with Linux that come as part of UC now. Multi-Targeting Perhaps one of the hardest things to do that requires an automated build is multi-targeting. At v1 this is early, and possibly prone to some issues, but available.  We believe in making everything stupid simple, so it’s as simple as adding a comma to the microsoft.framework property. i.e. “net-3.5, net-4.0” to suddenly produce both framework builds. When you build, this is what you get (if you meet each framework’s requirements): At this time you have to let UC override the build location (as it does by default) or this will not work.  Semantic Versioning By now many of you have been using UppercuT for awhile and have watched how we have done versioning. Many of you who use git already know we put the revision hash in the informational/product version as the last octet. At v1, UppercuT has adopted the semantic versioning scheme. What does that mean? This is a short read, but a good one: http://SemVer.org SemVer (Semantic Versioning) is really using versioning what it was meant for. You have three octets. Major.Minor.Patch as in 1.1.0.  UC will use three different versioning concepts, one for the assembly version, one for the file version, and one for the product version. All versions - The first three octects of the version are owned by SemVer. Major.Minor.Patch i.e.: 1.1.0 Assembly Version - The assembly version would much closer follow SemVer. Last digit is always 0. Major.Minor.Patch.0 i.e: 1.1.0.0 File Version - The file version occupies the build number as the last digit. Major.Minor.Patch.Build i.e.: 1.1.0.2650 Product/Informational Version - The last octect of your product/informational version is the source control revision/hash. Major.Minor.Patch.RevisionOrHash i.e. (TFS/SVN): 1.1.0.235 i.e. (Git/HG): 1.1.0.a45ace4346adef0 SemVer is not on by default, the passive versioning scheme is still in effect. Notice that version.use_semanticversioning has been added to the UppercuT.config file (and version.patch in support of the third octet): Gems Support Gems support was added at v1. This will probably be deprecated as some point once there is an announced sunset for Nu v1. Application gems may keep it around since there is no alternative for that yet though (CoApp would be a possible replacement). Nitriq Support Nitriq is a code analysis tool like NDepend. It’s built by Mr. Jon von Gillern. It uses LINQ query language, so you can use a familiar idiom when analyzing your code base. It’s a pretty awesome tool that has a free version for those looking to do code analysis! To use Nitriq with UC, you are going to need the console edition.  To take advantage of Nitriq, you just need to update the location of Nitriq in the config: Then add the nitriq project files at the root of your source. Please refer to the Nitriq documentation on how these are created. UppercuT v1.1 Obfuscation One thing I started looking into was an easy way to obfuscate my code. I came across EazFuscator, which is both free and awesome. Plus the GUI for it is super simple to use. How do you make obfuscation even easier? Make it a convention and a configurable property in the UC config file! And the code gets obfuscated! Closing Definitely get out and look at the new release. It contains lots of chocolaty (sp?) goodness. And remember, the upgrade path is almost as simple as drag and drop!

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• Maximized Office 2007 gets cut off on multi-monitor setup with different resolutions

  - by Adam M-W

  I've got an external monitor plugged into my laptop that I like to use for typing up documents, but I've noticed that when Word is maximized it gets cut off at where the primary monitor's bounds are. Is this a bug in Wine (i'm using version 1.3.32), or with my Window Manager (metacity with compositing enabled, version 2.34.1), with my graphics drivers (nouveau) or something else? I know that I can fix it by unmaximizing (it doesn't get cut off and I can resize to the entirety of the second monitor), but it keeps on maximizing itself as it (rightly so) knows that it should be taking up the entire screen. I don't really want to use the "Emulate a virtual desktop feature", I would prefer to find the source of this issue.

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• Wastage of resources in Virtualization

  - by Sabeen Malik

  I have asked this question on SO, but was suggested that i ask it here on SF, so here it goes. http://stackoverflow.com/questions/3010753/wastage-of-resources-in-virtualization I am not sure if this is the right place to ask the question. However i hope it is. When looking for a VPS earlier today, I was trying to understand how each container would work in the background. Keeping in mind the fact that the operating system uses most of the memory and power on a system, wouldn't having multiple operating systems in the same machine mean more wastage of resources. For instance if i was running centOS on a dedicated box and it was running lets say 20 background OS level processes. Then i go and install a virtualization platform and install 5 more centOS virtual machines in the same system which are exactly the same as the host operating system. Doesn't this mean duplication of those 20 processes 6 times? So internally the context switching is happening between 120 processes instead of 20? Further Notes: Here is an example of what i am thinking: I have a master-slave configuration for a long running, cpu + memory intensive process, which can be distributed to 4 machines. Lets say when the process runs on these 4 machines with lets say 1 Gh CPU and 1 Gig RAM, i get 400 results per hour from the cluster (assuming 100 results from one machine) . Now i get a bigger machine ( lets say 4Gh and 4 Gig RAM), have 4 virtual hosts on it with 1 Gz CPU and 1 Gig RAM. Will this configuration give me the same 4 results per hour from these 4 virtual hosts?

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• How to disable Alert volume from the command line?

  - by Bryce

  There is an option in the Sound Preferences dialog, Sound Effects tab, to toggle Alert volume 'mute'. It works and suffices for my needs to disable the irritating system beep/bell. However, I reinstall systems a LOT for testing purposes and would like to set this setting in a shell script so it's off without having to fiddle with a GUI. But for the life of me I can't seem to find where this can be toggled via a command line tool. I've scanned through gconf-editor, pulseaudio's pacmd, grepped through /etc, even dug through the gnome-volume-control source code, but I am not seeing how this can be set. I gather that gnome-volume-control has changed since a few releases ago. Ideas?

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• Good Literature for "Object oriented programming in C"

  - by Dipan Mehta

  This is not a debate question about whether or not C is a good candidate for Object oriented programming or not. Quite often C is the primary platform where the development is happening. I have seen, and hopefully learnt through crawling many open source and commercial projects - that while the language inherently doesn't stop you if you create "non-object" code. However, you can still think in the "Object" way and reasonably write code that captures this designs thinking. For those who has done this, OO way is still the best way to write code even when you are programming in C. While, I have learnt most of it through the hard way, are there any deep literature that can help educate the relatively young guys about how to do OO programming in C?

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• How to make openJDK automatically update-alternatives?

  - by cgc512

  Well, I've made a fresh Ubuntu 11.10 install and I installed openJDK 7. It updated alternatives just after installing, so it was all good. Then, I compiled a source and executed it and it didn't worked, then I noticed that java was using the version 1.6, while the javac was 1.7. I thought I had installed it wrong, so I uninstalled it and installed it again. But now, it does not update alternatives automatically (it does it only for javaws). Is there a way to "restart" it so the apt-get does the update-alternatives by itself like the first time? Is it normal that it uses the java 1.6 instead of the java 1.7 when installing openJDK 7? Thank you very much!

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• LGPL License in commercial application

  - by Jacob

  I have searched around but I don't seem to be able to get a clear answer on my questions that I understand. I want to use the Xuggler library in my application, which is licensed either GPL or LGPL depending on whether I compile it myself. I don't intend to edit the library If I compile it myself and thus get a LGPL version of the library, can I use it in a commercial application without having to distribute the source code of my application? Furthermore, do I have to give my application the LGPL license as well? What other problems might using this library give me?

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• Safe project development - free repositories

  - by friko

  Some time ago we started a private hobby project. We made a project on javaforge.com, created an svn repository and started developing our app. Right now we are really far with our project, but somehow we never worried if our project is really safe on such free development tool like javaforge ? I mean, what if our project would earn some money and the source code become valuable ? Could it be stolen or could somebody take it over ? We want to be sure that we are not wasting our time and want to be really sure about our project safety. Is it possible to safely develop a project in such free repository ? We would like also to start using redmine, so if you know any safe place for moving our project, please take this under consideration. Thanks a lot.

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• Windows 7 task bar stuck in hiding, how to fix?

  - by Rainer Blome

  In Windows 7, I use the "Auto-hide the task bar" feature. Usually, it works fine: As soon as the pointer touches the screen bottom, the task bar pops up. However sometimes, it refuses to rise. Pressing the "Windows" key (or Ctrl-ESC) makes the start menu appear, forcing the task bar from hinding as well. Once I've done this, the task-bar auto-rises again. This is annoying, it interrupts flow. Has anyone else noticed this? How do I avoid this? Searching for "Windows 7 task bar auto-raise" shows that at least one other person experienced this problem: http://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/how-can-i-fix-the-taskbars-auto-hide/8cdf6369-7354-4d29-9249-b7096ed0e28b?msgId=6dac3361-9d0f-4a9e-8642-b91a72826ba4 To answer the question posed by the "helpful" support engineer on the above page, of course I am running some apps when this happens, usually Explorer, Firefox, Eclipse, Cygwin/X, Xterm, Emacs, Notes, VPN client, Firewall. If my memory serves correctly, I have seen this behavior on earlier versions of Windows as well, XP at least. To reproduce this behavior, I tried switching between apps, and bringing apps to open other windows. I am unable to reproduce this behavior so far. So far, it appears to happen out of the blue, sometimes multiple times a day. Looks like a bug to me. The task bar should raise no matter what.

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• Attachment handling for web application with Jackrabbit

  - by Andrea Girardi

  I need to manage attachments on my Spring web application and I thought to use an open source repository. My app it's a job approval system using J2EE / SPRING 3 Framework and Postgress DB to allow user to tracks the job,right through every step of the approval process. It is a fully managed, collaborative system that operates from a central server and is accessed by a standard internet browser. An user should be able to add an attach to a request or an approval step, so, I though to use Jackrabbit with Postgres database persistence manager. I took a look to this post: http://onjava.com/pub/a/onjava/2006/10/04/what-is-java-content-repository.html?page=1 It's really interesting but, I've some question about this kind of solution :- I seen that Jackrabbit standalone as a Derby database embedded solution for persistence, is it enough for a professional use of the repository with more than 50 request / days (with attachment) ? Is there a reason for which I should use another database manager for persistence instead of the default one ?

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• Whats the thing the report bugs in php?

  - by Max Hazard

  Currently I am learning php. Php is understood by browser itself right from php sdk right? SDK include libraries right? So browser is like an interpreter of php codes. I want to know that whenever I type a wrong php syntax what is the thing report me the error? Obviously the browser is reporting the error. But what part of it? I mean I don't get it. Like writing a compiler we do lexical analysis and make the compiler which report any bug in source code. I assume here browser is analogous to compiler. I don't know exactly but compiler contains bug report functions or methods which is debugger. Debugger is part of compiler which report bugs. Does the browser contains such debuggers? Can there be any browser which doesn't understand php?

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• DLNA Media Server and external subtitles

  - by Lobo

  I'm looking DLNA Media Server with the features above: Support most extended video formats. Reproduce external subtitles in client side. Open source or freeware software. USE CASE: DLNA Media server installed and running on my PC. In my PC, I have /home/myprofile/videos directory where I store all my video files. For example, game.of.thrones.s09.e06.mpg and game.of.thrones.s09.e06.srt Turn on my Smart-TV, connect to my DLNA Media Server (installed on my PC) Play game.of.thrones.s09.e06.mpg file and see the subtitles overlapped. Finally, my question: Is there some DLNA Media server that provides that use case?. Thank you.

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• 12.04 run from cd, cannot copy files from mounted disk

  - by user75122

  I am running 12.04 live from cd and trying to copy some important files from a mounted hard disk to an external disk. (My previous installation of 10.04 crashed and I want to install 12.04, and back up some data before that). When I try to copy files from the mounted disk to the external one, I get the following error: There was an error copying the file into /media/New Volume/L300_Bkp_2012_06_04/pics Error opening file: Permission denied Is this related to the source(mounted hard disk) or the target (external disk)? How do I get around this?

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• How does one handle sensitive data when using Github and Heroku?

  - by Jonas

  I am not yet accustomed with the way Git works (And wonder if someone besides Linus is ;)). If you use Heroku to host you application, you need to have your code checked in a Git repo. If you work on an open-source project, you are more likely going to share this repo on Github or other Git hosts. Some things should not be checked in the public repo; database passwords, API keys, certificates, etc... But these things still need to be part of the Git repo since you use it to push your code to Heroku. How to work with this use case? Note: I know that Heroku or PHPFog can use server variables to circumvent this problem. My question is more about how to "hide" parts of the code.

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• Extending SSIS with custom Data Flow components (Presentation)

  Download the slides and sample code from my Extending SSIS with custom Data Flow components presentation, first presented at the SQLBits II (The SQL) Community Conference. Abstract Get some real-world insights into developing data flow components for SSIS. This starts with an introduction to the data flow pipeline engine, and explains the real differences between adapters and the three sub-types of transformation. Understanding how the different types of component behave and manage data is key to writing components of your own, and probably should but be required knowledge for anyone building packages at all. Using sample code throughout, I will show you how to write components, as well as highlighting best practice and lessons learned. The sample code includes fully working example projects for source, destination and transformation components. Presentation & Samples (358KB) Extending SSIS with custom Data Flow components.zip

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• How many lines of code can a C# developer produce per month?

  - by lox

  An executive at my workplace asked me and my group of developers the question: How many lines of code can a C# developer produce per month? An old system was to be ported to C# and he would like this measure as part of the project planning. From some (apparently creditable) source he had the answer of "10 SLOC/month" but he was not happy with that. The group agreed that this was nearly impossible to specify because it would depend on a long list of circumstances. But we could tell that the man would not leave (or be very disappointed in us) if we did not come up with an answer suiting him better. So he left with the many times better answer of "10 SLOC/day" Can this question be answered? (offhand or even with some analysis)

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• Rendering oily/polluted water?

  - by Fraser

  Any shader wizards out there have an idea of how to achieve an oily/polluted water effect, similar to this: Ideally, the water would not be uniformly oily, but instead the oil could be generated from some source (such as a polluting drain from a chemical plant) and then diffuse throughout the water body. My thought for this part would be to keep an "oil map" as a 2D texture that determines the density of oil at each point on the water surface. It would diffuse and move naturally with the water vel;ocity at that point (I have a wave-particle simulation for dynamic waves, and am already doing something similar for foam on the water surface). However, I'm not sure how physically correct that would be, since oil might not move at the same velocity as the water. And I have no idea how to make all those trippy colors :-). Thoughts?

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• Windows 7 XP Mode-Program not ending properly

  - by iceman33

  We currently have recently have implemented a few new machines to our network with Windows 7 Enterprise 64-bit installed on them. We have a program that is incompatible with Windows 7 right now and we have it installed on the Windows XP Mode that we have setup on there. There is a shortcut that is on the desktop to have it work with integration services and that part is working successfully. Occasionally, this program will stop working over the server on which it connects to has to get rebooted and the program has to get closed out. However, that process that is in the task manager doesn't seem to close out properly. So in order to correctly get the program shut down, we have to make the users log back into xp mode and do a Ctrl+Alt+Delete to kill the process or have to go back into the machine to perform a restart. I was wondering if anyone has come across a way within XP Mode yet that when the virtual machine goes into hibernation mode that it would shut down all processes or if when restarting the virtual machine your normal machine that it would shut everything down in the virtual XP mode as well and not just keep that program running? Any help would be greatly appreciated.

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