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• Ubuntu stops using Nvidia driver after kernel upgrade

  - by Daniel

  Just updated and restarted, Ubuntu's doesn't display correctly. After restart, the desktop now looks like this. I've temporarily switched to the Nouveau driver. The update history reveals the kernel was updated, amongst many things; and the following were installed: linux-image-3.5.0-19-generic (3.5.0-19.30) linux-image-extra-3.5.0-19-generic (3.5.0-19.30) I've encountered this type of problem quite recently, so I decided to reapply the same steps, to solve the problem, as follows: sudo apt-get install linux-headers-3.5.0-19 sudo apt-get install linux-headers-3.5.0-19-generic sudo depmod -a sudo modprobe nvidia sudo /etc/init.d/*dm restart When installing linux-headers-3.5.0-19-generic, I get an error, message from terminal as follows: Setting up linux-headers-3.5.0-19-generic (3.5.0-19.30) ... Examining /etc/kernel/header_postinst.d. run-parts: executing /etc/kernel/header_postinst.d/dkms 3.5.0-19-generic /boot/vmlinuz-3.5.0-19-generic Error! Problems with depmod detected. Automatically uninstalling this module. DKMS: Install Failed (depmod problems). Module rolled back to built state. However, I ignored the above error and continued the steps with sudo depmod -a, installed nvidia-current, then did sudo modprobe nvidia, which yielded the following error: FATAL: Error inserting nvidia_current (/lib/modules/3.5.0-19-generic/updates/dkms/nvidia_current.ko): No such device Upon restart, the Nvidia driver now works! BTW, do those error messages imply I broke something? Just curious, cause I don't want to get happy I've fixed it, then it stops working later on. The system is Dell XPS-L702X, with NVIDIA GeForce GT 555M, and 17" screen.

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• Report from OpenWorld Shanghai

  - by jmorourke

  Oracle OpenWorld Shanghai 2013 was held July 22nd – 25th at the International Expo Center in Shanghai, China. The conference drew over 19,000 attendees from 44 countries. In addition, 580 CxOs attended the Executive Edge program, and 430+ partners attended the Oracle Partner Network Exchange. The conference included a number of sessions on Big Data, Business Analytics, Business Intelligence and Enterprise Performance Management delivered by Oracle, our partners and customers.  I had the pleasure to attend the conference and delivered three sessions focused on Oracle’s Hyperion Enterprise Performance Management (EPM) applications. Each of my sessions was well-attended, and in a few cases was standing room only, so there is clearly a lot of interest in the China market in EPM. The EPM and BI demo pods in the DemoGrounds at the conference also received a lot of traffic. In addition to the conference sessions I delivered, I had several meetings with customers and partners in Shanghai.These sessions and meetings I attended made clear the interest that customers in China have in improving their planning, management reporting, financial reporting, and profitability management processes. In fact, with the China Ministry of Finance now standardizing on XBRL for annual reporting across multiple agencies in China, there is a great opportunity here for our disclosure management application. One interesting finding is that the China market may not be ready for cloud-based applications as many companies are state-owned and have security concerns, so on-premise applications are likely to see continued demand.  For more information about the Oracle OpenWorld China 2013 conference, please check the web  site:  http://www.oracle.com/events/apac/cn/en/openworld/index.htmlAnd don’t forget, Oracle OpenWorld San Francisco 2013 is just around the corner in September of 2013. Please check the web site for registration and content information: http://www.oracle.com/openworld/index.html

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• Looking for a small, light scene graph style abstraction lib for shader based OpenGL

  - by Pris

  I'm looking for a 'lean and mean' c/c++ scene graph library for OpenGL that doesn't use any deprecated functionality. It should be cross platform (strictly speaking I just dev on Linux so no love lost if it doesn't work on Windows), and it should be possible to deploy to mobile targets (ie OpenGLES2, and no crazy mandatory dependencies that wouldn't port well to modern mobile frameworks like iOS, Android, etc), with a license that's compatible with closed source software (LGPL or more liberal). Specific nice-to-haves would be: Cameras and Viewers (trackball, fly-by, etc) Object transform hierarchies (if B is a child of A, and you move A, B has the same transform applied to it) Simple animation Scene optimization (frustum culling, use VBOs, minimize state changes, etc) Text I've played around with OpenSceneGraph a lot and it's pretty amazing for fixed function pipeline stuff, but I've had a few of problems using it with the programmable pipeline and after going through their mailing list, it seems several people have had similar issues (going back years). Kitware's VES looks neat (http://www.vtk.org/Wiki/VES), but VES + VTK is pretty heavy. VTK is also typically for analyzing scientific data and I've read that it's not that appropriate for a general use case (not that great at rendering a lot of objects on scene,etc) I'm currently looking at VisualizationLibrary (http://www.visualizationlibrary.org/documentation/pag_gallery.html) which looks like it offers some of the functionality I'd like, but it doesn't explicitly support mobile targets. Other solutions like Ogre, Horde3D, Irrlicht, etc tend to be full on game engines and that's not really what I'm looking for. I'd like some suggestions for other libraries that I may have missed... please note I'm not willing to roll my own solution from scratch.

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• Get to Know a Candidate (19-25 of 25): Independent Candidates

  - by Brian Lanham

  DISCLAIMER: This is not a post about “Romney” or “Obama”. This is not a post for whom I am voting.  Information sourced for Wikipedia. The following independent candidates have gained access to at least one state ballot. Richard Duncan, of Ohio; Vice-presidential nominee: Ricky Johnson Candidate Ballot Access: Ohio - (18 Electoral)  Write-In Candidate Access: Alaska, Florida, Indiana, Maryland Randall Terry, of West Virginia; Vice-presidential nominee: Missy Smith Candidate Ballot Access: Kentucky, Nebraska, West Virginia - (18 Electoral)  Write-In Candidate Access: Colorado, Indiana Sheila Tittle, of Texas; Vice-presidential nominee: Matthew Turner Candidate Ballot Access: Colorado, Louisiana - (17 Electoral) Jeff Boss, of New Jersey; Vice-presidential nominee: Bob Pasternak Candidate Ballot Access: New Jersey - (14 Electoral) Dean Morstad, of Minnesota; Vice-presidential nominee: Josh Franke-Hyland Candidate Ballot Access: Minnesota - (10 Electoral)  Write-In Candidate Access: Utah Jill Reed, of Wyoming; Vice-presidential nominee: Tom Cary Candidate Ballot Access: Colorado - (9 Electoral)  Write-In Candidate Access: Indiana, Florida Jerry Litzel, of Iowa; Vice-presidential nominee: Jim Litzel Candidate Ballot Access: Iowa - (6 Electoral) That wraps it up people. We have reviewed 25 presidential candidates in the 2012 U.S. election. Look for more blog posts about the election to come.

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• Installing Skype on 12.04 64 bit causes errors

  - by Wolfy87

  Hi there I am trying to install Skype through apt-get but I am having some trouble. The Skype package depends on skype-bin which is not found in my list of packages. So when trying to install Skype I get the following error. $ sudo apt-get install skype Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: skype : Depends: skype-bin but it is not installable E: Unable to correct problems, you have held broken packages. Does anyone know why this might happen? Am I missing a repository? I get similar results when downloading the .deb from their site. But it complains about ai32-libs not being installable. This is because it depends on another package that does not exist in my list. Please bear in mind that this is a custom install from the company I work for. They have secured it and I think they have updated it over time and skipped versions, possibly breaking things.

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• Online Media Daily: Oracle Takes Social Marketing Seriously

  - by Kathryn Perry

  In the article published on Nov 12, 2012 and titled "Oracle Integrates Social Marketing Into Enterprise To Gain Marketing Revs," Online Media Daily explores Oracle's approach to social marketing. The publication says that Oracle is focused on showing marketers how to integrate social data into corporate business processes and how to "socialize" the corporate world.The article goes on to state:"Enterprise software companies like Oracle, SAP, IBM, Salesforce and Microsoft have been slowly building up an expertise in social marketing to integrate the data into traditional enterprise resource planning, and customer relationship management tools into social marketing tools.   Enterprise software companies like Oracle, SAP, IBM, Salesforce and Microsoft have been slowly building up an expertise in social marketing to integrate the data into traditional enterprise resource planning, and customer relationship management tools into social marketing tools.   Read more: http://www.mediapost.com/publications/article/187096/oracle-integrates-social-marketing-into-enterprise.html#ixzz2CPMZ1w3DMeg Bear, VP of cloud social platform at Oracle, sees the integration with ERP systems as a differentiator for the company. Oracle Social Relationship Management launched last month. It integrates social data into traditional enterprise applications like Oracle Fusion Marketing, Oracle Fusion Sales Catalog, Oracle ATG Web Commerce and Oracle ERP."The post goes on to quote a Forrester analyst stating the following:""There's room for any process-driven application to run more efficiently, especially if they're socially enabled," said Rob Koplowitz, VP and principal analyst at Forrester Research. "It takes the human part of the process not generally captured today to provide better access to content, information and collective actions."Koplowitz said several acquisitions support Oracle's long-term vision: to layer social on top of other enterprise apps, like its ERP platform."With many great acquisitions under our belt and organically grown social tools, the market recognizes that Oracle is poised to seize the moment in socially enabled business apps.Continue reading the full article here.

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• How to make and restore incremental snapshots of hard disk

  - by brunopereira81

  I use Virtual Box a lot for distro / applications testing purposes. One of the features I simply love about it is virtual machines snapshots, its saves a state of a virtual machine and is able to restore it to its former glory if something you did went wrong without any problems and without consuming your all hard disk space. On my live systems I know how to create a 1:1 image of the file system but all the solutions I'v known will create a new image of the complete file system. Are there any programs / file systems that are capable of taking a snapshot of a current file system, save it on another location but instead of making a complete new image it creates incremental backups? To easy describe what I want, it should be as dd images of a file system, but instead of only a full backup it would also create incremental. I am not looking for clonezilla, etc. It should run within the system itself with no (or almost none) intervention from the user, but contain all the data of the file systems. I am also not looking for a duplicity backup your all system excluding some folders script + dd to save your mbr. I can do that myself, looking for extra finesse. I'm looking for something I can do before doing massive changes to a system and then if something when wrong or I burned my hard disk after spilling coffee on it I can just boot from a liveCD and restore a working snapshot to a hard disk. It does not need to be daily, it doesn't even need a schedule. Just run once in a while and let it its job and preferably RAW based not file copy based.

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• Using a permutation table for simplex noise without storing it

  - by J. C. Leitão

  Generating Simplex noise requires a permutation table for randomisation (e.g. see this question or this example). In some applications, we need to persist the state of the permutation table. This can be done by creating the table, e.g. using def permutation_table(seed): table_size = 2**10 # arbitrary for this question l = range(1, table_size + 1) random.seed(seed) # ensures the same shuffle for a given seed random.shuffle(l) return l + l # see shared link why l + l; is a detail and storing it. Can we avoid storing the full table by generating the required elements every time they are required? Specifically, currently I store the table and call it using table[i] (table is a list). Can I avoid storing it by having a function that computes the element i, e.g. get_table_element(seed, i). I'm aware that cryptography already solved this problem using block cyphers, however, I found it too complex to go deep and implement a block cypher. Does anyone knows a simple implementation of a block cypher to this problem?

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• Can't install Skype on Ubuntu 12.04 64 bit

  - by Gabriel Alvim

  I've tried many different ways: I downloaded the file on the Skype website, which returned me this error "Cannot install ia-32-libs" I followed this instructions https://help.ubuntu.com/community/Skype and here is what I got: **W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/partner/Packages/binary-amd64/Packages 404 Not Found [IP: 91.189.92.191 80] W: Failed to fetch http://archive.canonical.com/ubuntu/dists/precise/partner/Packages/binary-i386/Packages 404 Not Found [IP: 91.189.92.191 80] E: Some index files failed to download. They have been ignored, or old ones used instead.** I even tried this command line: sudo apt-get install lib32stdc++6 lib32asound2 ia32-libs libc6-i386 lib32gcc1 skype And this is what I got: **Error: need a repository as argument pandora@ubuntu:~$ sudo apt-get install lib32stdc++6 lib32asound2 ia32-libs libc6-i386 lib32gcc1 skype Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: ia32-libs : Depends: ia32-libs-multiarch skype : Depends: skype-bin E: Unable to correct problems, you have held broken packages.** I just don't know what to do anymore, if I can't use skype, I might as well not use ubuntu at all. Please, someone help

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• Designing business objects, and gui actions

  - by fozz

  Developing a product ordering system using Java SE 6. The previous implementations used combo boxes, text fields, and check boxes. Preforming validation on action events from the GUI. The validation includes limiting existing combo boxes items, or even availability. The issue in the old system was that the action was received and all rules were applied to the entire business object. This resulted in a huge event change as options were changed multiple times. To be honest I have no idea how an infinite loop wasn't produced. Through the next iteration I stepped in and attempted to limit the chaos by controlling the order in which the selections could be made. Making configuration of BO's a top down approach. I implemented custom box models, action events, beans/binding, and an MVC pattern. However I still am unable to fully isolate action even chains. I'm thinking that I've approached the whole concept backwards in an attempt to stay closest to what was already in place. So the question becomes what do I design instead? I'm currently considering an implementation of Interfaces, Beans, Property Change Listeners to manage the back and forth. Other thoughts were validation exceptions, dynamic proxies.... I'm sure there are a ton of different ways. To say that one way is right is crazy, and I'm sure it will take a blending of multiple patterns. My knowledge of swing/awt validation is limited, previously I did backend logic only. Other considerations are were some sort of binding(jgoodies or otherwise) to directly bind GUI state to BO's.

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• What's the proper term for a function inverse to a constructor? Deconstructor, destructor, or something else?

  - by Petr Pudlák

  Edit: I'm rephrasing the question a bit. Apparently I caused some confusion because I didn't realize that the term destructor is used in OOP for something quite different - it's a function invoked when an object is being destroyed. In functional programming we (try to) avoid mutable state so there is no such equivalent to it. (I added the proper tag to the question.) Instead, I've seen that the record field for unwrapping a value (especially for single-valued data types such as newtypes) is sometimes called destructor or perhaps deconstructor. For example, let's have (in Haskell): newtype Wrap = Wrap { unwrap :: Int } Here Wrap is the constructor and unwrap is what? I've seen both, for example: ... Most often, one supplies smart constructors and destructors for these to ease working with them. ... at Haskell wiki, or ... The general theme here is to fuse constructor - deconstructor pairs like ... at Haskell wikibook (here it's probably meant in a bit more general sense). The questions are: How do we call unwrap in functional programming? Deconstructor? Destructor? Or by some other term? And to clarify, is this terminology applicable to other functional languages, or is it used just in the Has

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• Empty interface to combine multiple interfaces

  - by user1109519

  Suppose you have two interfaces: interface Readable { public void read(); } interface Writable { public void write(); } In some cases the implementing objects can only support one of these but in a lot of cases the implementations will support both interfaces. The people who use the interfaces will have to do something like: // can't write to it without explicit casting Readable myObject = new MyObject(); // can't read from it without explicit casting Writable myObject = new MyObject(); // tight coupling to actual implementation MyObject myObject = new MyObject(); None of these options is terribly convenient, even more so when considering that you want this as a method parameter. One solution would be to declare a wrapping interface: interface TheWholeShabam extends Readable, Writable {} But this has one specific problem: all implementations that support both Readable and Writable have to implement TheWholeShabam if they want to be compatible with people using the interface. Even though it offers nothing apart from the guaranteed presence of both interfaces. Is there a clean solution to this problem or should I go for the wrapper interface? UPDATE It is in fact often necessary to have an object that is both readable and writable so simply seperating the concerns in the arguments is not always a clean solution. UPDATE2 (extracted as answer so it's easier to comment on) UPDATE3 Please beware that the primary usecase for this is not streams (although they too must be supported). Streams make a very specific distinction between input and output and there is a clear separation of responsibilities. Rather, think of something like a bytebuffer where you need one object you can write to and read from, one object that has a very specific state attached to it. These objects exist because they are very useful for some things like asynchronous I/O, encodings,...

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• HCM: North America: Year End Knowledge Content References

  - by CaroleB

  As we all know, the next couple of months will be busy ones for the Payroll and IT department in relation to preparing for Year End,as a means of assisting you to find documented knowledge in reference to North American (NA) Year End, the following reference guide has been put together: General Knowledge: Doc ID 404478.1 Americas (US, CA, MX) HCM High Priority Alert Doc ID 1577601.1 North American Year End 2013 / 2014 Year Begin Patch Information and Useful Links. Monitor this note as it will be updated as new information becomes available NA Year End Processing: Document 255466.1 - End of Year Processing Using Oracle HRMS (US)  Document 260344.1 - End Of Year Processing Using Oracle HRMS (Canada) Document 395622.1 - End Of Year Processing Using Oracle HRMS (Mexican) Patching : Document 216109.1 - Oracle Human Resources (HRMS) Payroll North America Annual Patching Schedule Document 1160507.1 - Oracle E-Business Suite - Consolidated HRMS Mandatory Patch List Document 1144633.1 - US Year End Patch Flow Advisor: E-Business Suite (EBS) Human Capital Management (HCM) for US Legislation patching 2013 YE Phase I Readme's US Document 1584795.1 Release 11i   - 2013 US Payroll Year End Phase 1 Readme Document 1584796.1 Release 12.0 - 2013 US Payroll Year End Phase 1 Readme Document 1584797.1 Release 12.1 - 2013 US Payroll Year End Phase 1 Readme CA Document 1585365.1 2013 Canadian Payroll Year End Phase 1 Readme Release 11i Document 1585366.1 2013 Canadian Payroll Year End Phase 1 Readme Release 12.0 Document 1585367.1 2013 Canadian Payroll Year End Phase 1 Readme Release 12.1 Known Issues / How To: Document 1527958.2 - Information Center: Oracle HRMS (US) (All Application Versions) Look specifically at the US- Year End Tab for information on: Year End Pre-Processor 1099R Federal, State, and Local Magnetic Media W-2 Paper Reports W-2 PDF W-2 Register Additional Resources: Webcast: Document 1455851.1 - Advisor Webcasts for Oracle E-Business Suite- Human Capital Management (HCM) Document 1592483.1 - Webcast: EBS North American Payroll Year End Process Flow November 20, 2013 at 3:30 pm ET, 2:30 pm CT, 1:30 pm MT, 12:30 pm PT Communities: Payroll – EBS HCM - EBS Community E-Business Patching Community

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• Windows 8: SL and HTML

  - by xamlnotes

  I  was just pointed to comment on my friend Andrew Brust’s blog about Silverlight versus HTML 5. Andrews blog is here: http://geekswithblogs.net/andrewbrust/archive/2011/11/23/windows-8-will-be-here-tomorrow-but-should-silverlight-be.aspx#600915 You can get another idea from another friend of mine Billy Hollis here: http://geekswithblogs.net/jalexander/archive/2011/04/09/the-eternal-battle-rich-v.-reachhellip--guest-blogger-billy-hollis.aspx The commenter is raving about HTML 5 and how that’s the future and SL is not. Well, my reaction is “hogwash”. Sure, HTML 5 is important and does some interesting stuff. Checkout what Bing.com is doing with it on some days and you can see. But to say that XAML is dead is nuts. I have been wrapping up bugs on a cross browser version of an application for awhile now. Whats the state of cross browser today? Well, better than a few years ago but far from perfect.  Each browser vendor interprets the specs in a little different way and you must account for them. The worst offender for major browsers? Apple and its Safari.  I had to make more changes for it than any other. Whats that got to do with XAML and SL/WPF?  Well, you write your SL code once and it runs in all browsers that support it, no changes. ipad does not? Well, they should be taken to court and forced too just like MS and others have been in the past for locking out competitors. Line of business applications? Write them in SL or WPF or both.  Use the power of XAML witch far out reaches html in any flavor and move on. We do need HTML 5 but its not a panacea nor will it replace all other technologies.

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• Wanted: Java Code Brainteasers

  - by Tori Wieldt

  The Jan/Feb Java Magazine will go out next week. It's full of great Java stories, interviews and technical articles. It also includes a Fix This section; the idea of this section is challenging a Java developer's coding skills. It's a multiple-choice brainteaser that includes code and possible answers. The answer is provided in the next issue. For an example, check out Fix This in the Java Magazine premier issue. We are looking for community submissions to Fix This. Do you have a good code brain teaser? Remember, you want tease your fellow devs, not stump them completely! If you have a submission, here's what you do:  1. State the problem, including a short summary of the tool/technique, in about 75 words. 2. Send us the code snippet, with a short set-up so readers know what they are looking at (such as, "Consider the following piece of code to have database access within a Servlet.") 3. Provide four multiple-choice answers to the question, "What's the fix?" 4. Give us the answer, along with a brief explanation of why. 5. Tell us who you are (name, occupation, etc.) 6. Email the above to JAVAMAG_US at ORACLE.COM with "Fix This Submission" in the title. Deadlines for Fix This for next two issues of Java Magazine are Dec. 12th and Jan. 15th. Bring It!

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• Making Modular, Reusable and Loosely Coupled MVC Components

  - by Dusan

  I am building MVC3 application and need some general guidelines on how to manage complex client side interaction between my components. Here is my definition of one component in general way: Component which has it's own controller, model and view. All of the component's logic is placed inside these three parts and component is sort of "standalone", it contains it's own form, data needed for interaction, updates itself with Ajax and so on. Beside this internal logic and behavior of the component, it needs to be able to "Talk" to the outside world. By this I mean it should provide data and events (sort of) so when this component gets embedded in pages can notify other components which then can update based on the current state and data. I have an idea to use client ViewModel (in java-script) which would hookup all relevant components on page and control interaction between them. This would make components reusable, modular - independent of the context in which they are used. How would you do this, I am a bit stuck as I do not know if this is a good approach and there is a technical possibility to achieve this using java-script/jquery. The confusing part is about update via Ajax, how to ensure that component is properly linked to ViewModel when component is Ajax updated (or even worse removed or dynamically added). Also, how should this ViewModel be constructed and which technicalities to use here and in components to work as synergy??? On the web, I have found the various examples of the similar approach, but they are oversimplified (even for dummies) or over specific and do not provide valuable resource or general solution for this kind of implementation. If you have some serious examples it would be, also, very helpful. Note: My aim is to make interactions between many components on the same page simpler and more robust and elegant.

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• virt-install says name is in use, but virsh list --all is empty. Where is virt-install finding this name?

  - by Jay _silly_evarlast_ Wren

  virt-install says name is in use, but virsh list --all says there is nothing. jrwren@delays:{%22}~ $ virt-install -d -n android -r 512 --disk android.qcow2 -s 4 -c /d/cd\ images/android-x86-2.2-generic.iso --vnc --noautoconsole [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:220) Launched with command line: /usr/bin/virt-install -d -n android -r 512 --disk android.qcow2 -s 4 -c /d/cd images/android-x86-2.2-generic.iso --vnc --noautoconsole [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:326) Requesting libvirt URI default [Thu, 05 Jul 2012 16:57:19 virt-install 23170] DEBUG (cli:328) Received libvirt URI qemu:///session [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (virt-install:259) Requesting virt method 'default', hv type 'default'. [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (virt-install:469) Received virt method 'hvm' [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (virt-install:470) Hypervisor name is 'kvm' [Thu, 05 Jul 2012 16:57:20 virt-install 23170] DEBUG (cli:950) --graphics compat generated: vnc [Thu, 05 Jul 2012 16:57:20 virt-install 23170] ERROR (cli:597) Guest name 'android' is already in use. (venv)jrwren@delays:{%22}~ $ sudo virsh -c qemu:///system list --all Id Name State ---------------------------------- Where is virt-install finding this name? edit: I should mention that LIBVIRT_DEFAULT_URI is not set.

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• WCF - Automatically create ServiceHost for multiple services

  - by Rajesh Pillai

  WCF - Automatically create ServiceHost for multiple services Welcome back readers!  This blog post is about a small tip that may make working with WCF servicehost a bit easier, if you have lots of services and you need to quickly host them for testing. Recently I was encountered a situation where we were faced to create multiple service host quickly for testing.  Here is the code snippet which is pretty self explanatory.  You can put this code in your service host which in this case is  a console application. class Program   {       static void Main(string[] args)       { // Stores all hosts           List<ServiceHost> hosts = new List<ServiceHost>();           try           { // Get the services element from the serviceModel element in the config file               var section = ConfigurationManager.GetSection("system.serviceModel/services") as ServicesSection;               if (section != null)               {                   foreach (ServiceElement element in section.Services)                   { // NOTE : If the assembly is in another namespace, provide a fully qualified name here in the form // <typename, namespace> // For e.g. Business.Services.CustomerService, Business.Services                       var serviceType = Type.GetType(element.Name); // Get the typeName                        var host = new ServiceHost(serviceType);                       hosts.Add(host); // Add to the host collection                       host.Open(); // Open the host                   }               }               Console.ReadLine();           }           catch (Exception e)           {               Console.WriteLine(e.Message);               Console.ReadLine();           }           finally           {               foreach (ServiceHost host in hosts)               {                   if (host.State == CommunicationState.Opened)                   {                       host.Close();                   }                   else                   {                       host.Abort();                   }               }           }       }   } I hope you find this useful.  You can make this as a windows service if required.

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• Kinect Click counter function

  - by Sweta Dwivedi

  So i have the following kinect click function which will check if the hand is within the bounds then it will click with a counter . . however there is a slight problem . .the first few button clicks work fine.. but after it clicks one of the buttons it changes the game state and immediately clicks the other button without the counter reaching 200. . . Kinect click is a method in the button class. . .and each button inside a list can access the Kinect click method. . . public bool KinectClick(int x,int y) { if ((x >= position.X && x <= position.X + position.Width) && (y >= position.Y && y <= position.Y + position.Height)) { counter++; if (counter > 200) { counter = 0; return true; } } else { counter = 0; } return false; } I call to check if this property is true in the Game update method to act as a button click. . foreach(Button g_t in Game_theme) { if ((g_t.KinectClick(x_c, y_c) == true || g_t.ButtonClicked() == true) && g_t.name == "animoe") { Selected_anim = true; currentGameState = GameState.InGame; } if ((g_t.KinectClick(x_c, y_c) == true || g_t.ButtonClicked() == true) && g_t.name == "planet") { Selected_planet = true; currentGameState = GameState.InGame; }

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• Data Structure for Small Number of Agents in a Relatively Big 2D World

  - by Seçkin Savasçi

  I'm working on a project where we will implement a kind of world simulation where there is a square 2D world. Agents live on this world and make decisions like moving or replicating themselves based on their neighbor cells(world=grid) and some extra parameters(which are not based on the state of the world). I'm looking for a data structure to implement such a project. My concerns are : I will implement this 3 times: sequential, using OpenMP, using MPI. So if I can use the same structure that will be quite good. The first thing comes up is keeping a 2D array for the world and storing agent references in it. And simulate the world for each time slice by checking every cell in each iteration and further processing if an agents is found in the cell. The downside is what if I have 1000x1000 world and only 5 agents in it. It will be an overkill for both sequential and parallel versions to check each cell and look for possible agents in them. I can use quadtree and store agents in it, but then how can I get the information about neighbor cells then? Please let me know if I should elaborate more.

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• 9 Gigapixel Photo Captures 84 Million Stars

  - by Jason Fitzpatrick

  The European Southern Observatory has released an absolutely enormous picture of the center of the Milky Way captured by their VISTA telescope–the image is 9 gigapixels and captures over 84 million stars. From the press release: The large mirror, wide field of view and very sensitive infrared detectors of ESO’s 4.1-metre Visible and Infrared Survey Telescope for Astronomy (VISTA) make it by far the best tool for this job. The team of astronomers is using data from the VISTA Variables in the Via Lactea programme (VVV), one of six public surveys carried out with VISTA. The data have been used to create a monumental 108 200 by 81 500 pixel colour image containing nearly nine billion pixels. This is one of the biggest astronomical images ever produced. The team has now used these data to compile the largest catalogue of the central concentration of stars in the Milky Way ever created. Want to check out all 9 billion glorious pixels in their uncompressed state? Be prepared to wait a bit, the uncompressed image is available for download but it weighs in at a massive 24.6GB. 84 Million Stars and Counting [via Wired] How Hackers Can Disguise Malicious Programs With Fake File Extensions Can Dust Actually Damage My Computer? What To Do If You Get a Virus on Your Computer

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• Problem with dpkg-preconfigure, how to correct?

  - by Eric Wilson

  I was trying to install TeamViewer, and I followed the instructions here even though they specify 11.10 instead of 12.04 (what I'm running). In particular, I executed. $ wget http://www.teamviewer.com/download/teamviewer_linux.deb $ sudo dpkg -i teamviewer_linux.deb The dpkg command failed, and after this point my packaging system has been broken. The software center instructs me to try: $ sudo apt-get -f install which leads to Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following packages will be REMOVED: teamviewer7:i386 0 upgraded, 0 newly installed, 1 to remove and 17 not upgraded. 9 not fully installed or removed. Need to get 89.0 kB of archives. After this operation, 81.9 MB disk space will be freed. Do you want to continue [Y/n]? y Get:1 http://us.archive.ubuntu.com/ubuntu/ precise/main dash amd64 0.5.7-2ubuntu2 [89.0 kB] Fetched 89.0 kB in 1s (83.9 kB/s) E: Sub-process /usr/sbin/dpkg-preconfigure --apt || true returned an error code (100) E: Failure running script /usr/sbin/dpkg-preconfigure --apt || true At this point I'm stumped.

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• Ubuntu 12.04 server froze during the first boot after it was installed.

  - by user69021

  I installed Ubuntu server 12.04 to my new server and it failed on the first boot. It just stopped and I can't proceed any further. Server's specifications: Dell PowerEdge T620 CPU : Xeon E5-2665 2.4G x 2 RAM : 8GB RDIMM, 1333MHz x 12 HDD : 3TB Near Line SAS 7.2K x 8 RAID controller : PERC H710 GPU : NVIDIA Tesla C2075 x 4 I have a screenshot of the screen it stopped on but I cannot attach it because my privilege level is currently too low. ![freeze on boot][1] Here are the last messages while booting. [5.048743] Freeing unused kernel memory : 920k freed [5.049046] Write protecting the kernel read-only data : 12288k [5.052973] Freeing unused kernel memory : 1608k freed [5.056132] Freeing unused kernel memory : 1196k freed Loading, please wait... [5.070236] udevd[218]: starting version 175 Begin: Loading essential drivers ... done. Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. [5.089030] megasas: 00.00.06.12-rc1 Wed. Oct. 5 17:00:00 PDT 2011 [5.089518] megasas: 0x1000:0x005b:0x1028:0x1f35: bus 1:slot 0:func 0 [5.089739] megaraid_sas 0000:01:00.0: PCI INT A -> GSI 34 (level, low) -> IRQ 34 [5.089937] megasas: FW now in Ready state [5.090427] dca service started, version 1.12.1 [5.091463] Intel(R) Gigabit Ethernet Network Driver - version 3.2.10-k [5.091578] Copyright (c) 2007-2011 Intel Corporation. [5.091712] igb 0000:06:00.0: PCI INT A -> GSI 16 (level,low) -> IRQ 16 [5.111090] megasas:IOC Init cmd success [5.123124] usb 1-1:new high-speed USB device number 2 using ehci_hcd What can I do about this?

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• Hijacking ASP.NET Sessions

  - by Ricardo Peres

  So, you want to be able to access other user’s session state from the session id, right? Well, I don’t know if you should, but you definitely can do that! Here is an extension method for that purpose. It uses a bit of reflection, which means, it may not work with future versions of .NET (I tested it with .NET 4.0/4.5). 1: public static class HttpApplicationExtensions 2: { 3: private static readonly FieldInfo storeField = typeof(SessionStateModule).GetField("_store", BindingFlags.NonPublic | BindingFlags.Instance); 4:  5: public static ISessionStateItemCollection GetSessionById(this HttpApplication app, String sessionId) 6: { 7: var module = app.Modules["Session"] as SessionStateModule; 8:  9: if (module == null) 10: { 11: return (null); 12: } 13:  14: var provider = storeField.GetValue(module) as SessionStateStoreProviderBase; 15:  16: if (provider == null) 17: { 18: return (null); 19: } 20:  21: Boolean locked; 22: TimeSpan lockAge; 23: Object lockId; 24: SessionStateActions actions; 25:  26: var data = provider.GetItem(HttpContext.Current, sessionId.Trim(), out locked, out lockAge, out lockId, out actions); 27:  28: if (data == null) 29: { 30: return (null); 31: } 32:  33: return (data.Items); 34: } 35: } As you can see, it extends the HttpApplication class, that is because we need to access the modules collection, for the Session module. Use with care!

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• Eclipse Java Code Formatter in NetBeans Plugin Manager

  - by Geertjan

  Great news for Eclipse refugees everywhere. Benno Markiewicz forked the Eclipse formatter plugin that I blogged about sometime ago (here and here)... and he fixed many bugs, while also adding new features. It's a handy plugin when you're (a) switching from Eclipse to NetBeans and want to continue using your old formatting rules and (b) working in a polyglot IDE team, i.e., now the formatting rules defined in Eclipse can be imported into NetBeans IDE and everyone will happily be able to conform to the same set of formatting standards. And now you can get it directly from Tools | Plugins in NetBeans IDE 7.4: News from Benno on the plugin, received from him today: The plugin is verified by the NetBeans community and available in the Plugin Manager in NetBeans IDE 7.4 (as shown above) and also at the NetBeans Plugin Portal here, where you can also read quite some info about the plugin:  http://plugins.netbeans.org/plugin/50877/eclipse-code-formatter-for-java The issue with empty undo buffer was solved with the help of junichi11: https://github.com/markiewb/eclipsecodeformatter_for_netbeans/issues/18 The issue with the lost breakpoints remains unsolved and there was no further feedback. That is the main reason why the save action isn't activated by default. See also the open known issues at https://github.com/markiewb/eclipsecodeformatter_for_netbeans/issues?state=open Features are as follows:  Global configuration and project specific configuration.  On save action, which is disabled by default. Show the used formatter as a notification, which is enabled by default.  Finally, Benno testifies to the usefulness, stability, and reliability of the plugin: I use the Eclipse formatter provided by this plugin every day at work. Before I commit, I format the sources. It works and that's it. I am pleased with it. Here's where the Eclipse formatter is defined globally in Tools | Options: And here is per-project configuration, i.e., use the Project Properties dialog of any project to override the global settings:  Interested to hear from anyone who tries the plugin and has any feedback of any kind! 

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