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• How to run boot loader in VMWare?

  - by Asim Haroon

  I am using Ubuntu as a virtual machine in VMWare. I have used this code to write a boot loader which would write Hello world on the screen. [BITS 16] [ORG 0x7C00] MOV SI, HelloString CALL PrintString JMP $ PrintCharacter: MOV AH, 0x0E MOV BH, 0x00 MOV BL, 0x07 INT 0x10 RET PrintString: next_character: MOV AL, [SI] INC SI OR AL, AL JZ exit_function CALL PrintCharacter JMP next_character exit_function: RET HelloString db 'Hello World', 0 TIMES 510 - ($ - $$) db 0 DW 0xAA55 I wrote this code in the text editor in Ubuntu and saved the file as Boot.asm Then I compiled the Boot.asm to boot.bin file by using this command nasm -f bin -o boot.bin Boot.asm and it didn't gave me any errors. After that I copied the boot.bin file to my usb and took it to my Windows OS. After this I burned the boot.bin file to boot.img and boot.iso files. Then I created a new virtual machine and named it booter, when it asked for the .iso file of the OS I want to run I gave it the boot.iso file, about which I told above, then I powered on that virtual machine but it gave me this error PXE-M0F: No boot filename received PXE-M0F: Exiting Intel PXE ROM Operating System not found Please tell me what is the main problem and how can I overcome that problem.

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• CodePlex Daily Summary for Tuesday, October 22, 2013

  CodePlex Daily Summary for Tuesday, October 22, 2013Popular ReleasesLINQ to Twitter: LINQ to Twitter v2.1.10: Supports .NET 3.5, .NET 4.0, .NET 4.5, Silverlight 4.0, Windows Phone 7.1, Windows Phone 8, Client Profile, Windows 8, and Windows Azure. 100% Twitter API coverage. Also supports Twitter API v1.1! Also on NuGet.Grauers Hide Ribbon Items: Grauers Hide Ribbon Items: Hiding ribbon items in a SharePoint libraryMedia Companion: Media Companion MC3.584b: IMDB changes fixed. Fixed* mc_com.exe - Fixed to using new profile entries. * Movie - fixed rename movie and folder if use foldername selected. * Movie - Alt Edit Movie, trailer url check if changed and confirm valid. * Movie - Fixed IMDB poster scraping * Movie - Fixed outline and Plot scraping, including removal of Hyperlink's. * Movie Poster refactoring, attempts to catch gdi+ errors Revision HistoryJayData -The unified data access library for JavaScript: JayData 1.3.4: JayData is a unified data access library for JavaScript to CRUD + Query data from different sources like WebAPI, OData, MongoDB, WebSQL, SQLite, HTML5 localStorage, Facebook or YQL. The library can be integrated with KendoUI, Angular.js, Knockout.js or Sencha Touch 2 and can be used on Node.js as well. See it in action in this 6 minutes video KendoUI examples: JayData example site Examples for map integration JayData example site What's new in JayData 1.3.4 For detailed release notes check ...TerrariViewer: TerrariViewer v7.2 [Terraria Inventory Editor]: Added "Check for Update" button Hopefully fixed Windows XP issue You can now backspace in Item stack fieldsIsWiX: IsWiX 2.2.13293.1: This a minor enhancement of the 2.1 release. IsWiX Merge Module projects now include a second wxs fragment file that is useful for inserting `custom` components not supposed by the IsWiX UI.Simple Injector: Simple Injector v2.3.6: This patch releases fixes one bug concerning resolving open generic types that contain nested generic type arguments. Nested generic types were handled incorrectly in certain cases. This affects RegisterOpenGeneric and RegisterDecorator. (work item 20332)Virtual Wifi Hotspot for Windows 7 & 8: Virtual Router Plus 2.6.0: Virtual Router Plus 2.6.0Fast YouTube Downloader: Fast YouTube Downloader 2.3.0: Fast YouTube DownloaderMagick.NET: Magick.NET 6.8.7.101: Magick.NET linked with ImageMagick 6.8.7.1. Breaking changes: - Renamed Matrix classes: MatrixColor = ColorMatrix and MatrixConvolve = ConvolveMatrix. - Renamed Depth method with Channels parameter to BitDepth and changed the other method into a property.VidCoder: 1.5.9 Beta: Added Rip DVD and Rip Blu-ray AutoPlay actions for Windows: now you can have VidCoder start up and scan a disc when you insert it. Go to Start -> AutoPlay to set it up. Added error message for Windows XP users rather than letting it crash. Removed "quality" preset from list for QSV as it currently doesn't offer much improvement. Changed installer to ignore version number when copying files over. Should reduce the chances of a bug from me forgetting to increment a version number. Fixed ...MSBuild Extension Pack: October 2013: Release Blog Post The MSBuild Extension Pack October 2013 release provides a collection of over 480 MSBuild tasks. A high level summary of what the tasks currently cover includes the following: System Items: Active Directory, Certificates, COM+, Console, Date and Time, Drives, Environment Variables, Event Logs, Files and Folders, FTP, GAC, Network, Performance Counters, Registry, Services, Sound Code: Assemblies, AsyncExec, CAB Files, Code Signing, DynamicExecute, File Detokenisation, GUI...VG-Ripper & PG-Ripper: VG-Ripper 2.9.49: changes NEW: Added Support for "ImageTeam.org links NEW: Added Support for "ImgNext.com" links NEW: Added Support for "HostUrImage.com" links NEW: Added Support for "3XVintage.com" linksMoreTerra (Terraria World Viewer): MoreTerra 1.11.3.1: Release 1.11.3.1 ================ = New Features = ================ Added markers for Copper Cache, Silver Cache and the Enchanted Sword. ============= = Bug Fixes = ============= Use Official Colors now no longer tries to change the Draw Wires option instead. World reading was breaking for people with a stock 1.2 Terraria version. Changed world name reading so it does not crash the program if you load MoreTerra while Terraria is saving the world. =================== = Feature Removal = =...patterns & practices - Windows Azure Guidance: Cloud Design Patterns: 1st drop of Cloud Design Patterns project. It contains 14 patterns with 6 related guidance.Player Framework by Microsoft: Player Framework for Windows and WP (v1.3): Includes all changes in v1.3 beta 1 and v1.3 beta 2 Support for Windows 8.1 RTM and VS2013 RTM Xaml: New property: AutoLoadPluginTypes to help control which stock plugins are loaded by default (requires AutoLoadPlugins = true). Support for SystemMediaTransportControls on Windows 8.1 JS: Support for visual markers in the timeline. JS: Support for markers collection and markerreached event. JS: New ChaptersPlugin to automatically populate timeline with chapter tracks. JS: Audio an...Json.NET: Json.NET 5.0 Release 8: Fix - Fixed not writing string quotes when QuoteName is falsePowerShell Community Extensions: 3.1 Production: PowerShell Community Extensions 3.1 Release NotesOct 17, 2013 This version of PSCX supports Windows PowerShell 3.0 and 4.0 See the ReleaseNotes.txt download above for more information.Social Network Importer for NodeXL: SocialNetImporter(v.1.9): This new version includes: - Download latest status update and use it as vertex tooltip - Limit the timelines to parse to me, my friends or both - Fixed some reported bugs about the fan page and group importer - Fixed the login bug reported latelyPython Tools for Visual Studio: 2.0: PTVS 2.0 We’re pleased to announce the release of Python Tools for Visual Studio 2.0 RTM. Python Tools for Visual Studio (PTVS) is an open-source plug-in for Visual Studio which supports programming with the Python language. PTVS supports a broad range of features including CPython/IronPython, Edit/Intellisense/Debug/Profile, Cloud, IPython, and cross platform and cross language debugging support. QUICK VIDEO OVERVIEW For a quick overview of the general IDE experience, please watch this v...New Projects40FINGERS NB_Store Menumanipulator: This component allows you to add the categories of your NB_Store webshop to your DotNetNuke website's menu.ABCat: ??????? ?????????? ???????????? ????????, ?????????????? ??????? ??? ????????? ????????? ?????????? ? ?????????? ????? ?????????.AUTOFIX: This is a project related to Web Application development for University of HertfordshireAutomated service accounts creation for SharePoint 2010 and 2013 and SQL Server: Purpose of this project is just to automate the creation of SharePoint Service accounts in Active Directory.BeatportPro: Windows version of Beatport ProCasaNet: CasaNetFree Cascaded Dropdown lists JQuery Plugin for SharePoint Forms: SPCascade lets you create multi-level cascaded dropdown lists on a SharePoint form using easy JQuery code.GODspeed - FTP client for JTAG/RGH Xbox 360 consoles: Total Commander like FTP client designed to fasten and clarify file management of JTAG/RGH/DevKit Xbox 360 consoles.HCI Web Search: This project seaches for using alternative ways to handle and to visualize Web search results in a 3D environment, by interacting with gestures and speech reco.HengbeiVillage: ASP.Net + EF + AjaxToolkit ControlsIntegração Cielo Nopcommerce: Realizar a integração nopcommerce com a Cielo. Maiores detalhes são bem vindo.juzgadosdelaciudad: Mapa con Juzgados de la ciudad de buenos airesLeapJanken: LeapMotion?????、Windows Store Apps??????????????????。Looking tester for Template Engine: -VALIDATE TEMPLATE SYNTAX - no template parsing overhead, only compiles once. - unlimited nesting of sections, conditionals, etc.MQTT Broker for .NET: Project to develop a broker (server) for the MQTT protocol, an M2M Internet-of-Things communication protocol.NC MKT DNT: NC MKTNet Imobiliaria: Projeto Integrador IV SenacNewBiz: NewBiz Java Web ApplicationOAuthServer: OAuthServer is an Open Authentication server that allows you to securely authenticate your Active Directory users directly on the internet.QlikBar SDK for .NET 2.0: QlikBar SDK for .NET 2.0RainNoise - The Sound of Rain, without the wet feet.: Making some rain noise for Android device.Redsys / Sermepa gateway for Asp.Net MVC4: Coming soon....Restore Exchange 2003 Data to Exchange 2010: SysTools Exchange Recovery tool which proffers efficient and beneficial features in order to restore or migrate Exchange mailboxes from one server to anotherTimely: A library to fluently work with DateTime and TimeSpan objectstutorials_online: This is a project that is associated with my progress in tutorials in Web Scripting and Application Development in for the University of HertfordshireUQBuy ?????: ??????，?????，????，??????Voxel To Mesh Converter: Converts voxel models into mesh models.

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• Model won't render in my XNA game

  - by Daniel Lopez

  I am trying to create a simple 3D game but things aren't working out as they should. For instance, the mode will not display. I created a class that does the rendering so I think that is where the problem lies. P.S I am using models from the MSDN website so I know the models are compatible with XNA. Code: class ModelRenderer { private float aspectratio; private Model model; private Vector3 camerapos; private Vector3 modelpos; private Matrix rotationy; float radiansy = 0; public ModelRenderer(Model m, float AspectRatio, Vector3 initial_pos, Vector3 initialcamerapos) { model = m; if (model.Meshes.Count == 0) { throw new Exception("Invalid model because it contains zero meshes!"); } modelpos = initial_pos; camerapos = initialcamerapos; aspectratio = AspectRatio; return; } public Vector3 CameraPosition { set { camerapos = value; } get { return camerapos; } } public Vector3 ModelPosition { set { modelpos = value; } get { return modelpos; } } public void RotateY(float radians) { radiansy += radians; rotationy = Matrix.CreateRotationY(radiansy); } public float AspectRatio { set { aspectratio = value; } get { return aspectratio; } } public void Draw() { Matrix world = Matrix.CreateTranslation(modelpos) * rotationy; Matrix view = Matrix.CreateLookAt(this.CameraPosition, this.ModelPosition, Vector3.Up); Matrix projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.ToRadians(45.0f), this.AspectRatio, 1.0f, 10000f); model.Draw(world, view, projection); } } If you need more code just make a comment.

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• 2D non-tile based map editor

  - by Jonesy

  I am currently developing a relatively simple 2D, topdown oriented adventure game for the iPhone and was wondering what would be the easiest way to create the maps for my game. I figured I would need some kind of visual editor that would give me immediate feedback and would allow me to place all objects in the world exactly where I want them. I could then load the saved representation of the world I create in the editor in my game. So, I am looking for a simple map editor that allows me to do this. All the objects in my game are simply textured rectangles build up from two triangles. All I need to be able to do is position different rectangles/objects in the map, and give them a texture. I am using texture atlases, so it would be useful to be able to assign portions of textures to the objects. I then need to be able to extract all the objects from the saved representation of my maps, together with the name/identifier of the texture(atlas) they use, and the area of the texture atlas. I have looked at some tile-based map editors like Tiled and Ogmo, but they don't seem to be able to do what I want. Any suggestions? EDIT: a more concrete example: something like the GameMaker level editor, but then with added export functionality in a handy format.

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• Programmer friendly non-voxel art styles?

  - by Overv

  Like many other programmers I've always wanted to make a game, but simply lack the skills to do any production quality graphics. I am however sure that I want to do the models and textures myself, because I need a lot of different objects and I am sure I wouldn't be able to find good matching models on 3D sites. That means I'll have to pick an art style that is "simple", programmer friendly. An extreme example of this is of course Minecraft, but I don't want to go that basic. I'm absolutely against creating a voxel game. What kind of art styles are out there that are relatively simple, i.e. things made out of basic shapes and textures, but are still good enough to form a believable and detailed world? An example of what I mean is wind waker. The objects are formed of relatively simples shapes, but still provide enough detail to create a nice, living world. The environment my game is set in is a city environment. What I'm really asking for here are good examples of "simple" art styles applied in practice, so I can choose one that fits my skills.

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• ArchBeat Link-o-Rama for November 30, 2012

  - by Bob Rhubart

  Oracle SOA Database Adapter Polling in a Cluster: A Handy Logical Delete Pattern | Carlo Arteaga "Using the SOA database adapter usually becomes easier when the adapter is simply viewed and treated as a gateway between the Oracle SOA composite world and the database world," says Carlo Arteaga. "When viewing the adapter in this light one should come to understand that the adapter is not the ultimate all-in-one solution for database access and database logic needs." OIM 11g : Multi-thread approach for writing custom scheduled job | Saravanan V S Saravanan shares insight and expertise relevant to "designing and developing an OIM schedule job that uses multi threaded approach for updating data in OIM using APIs." When Premature Optimization Isn't | Dustin Marx "Perhaps the most common situations in which I have seen developers make bad decisions under the pretense of 'avoiding premature optimization' is making bad architecture or design choices," says Dustin Marx. Protecting Intranet and Extranet Applications with a Single OAM 11g Deployment | Brian Eidelman Oracle Fusion Middleware A-Team member Brian Eideleman's post, part of the Oracle Access Manager Academy series, explores issues and soluions around setting up a single OAM deployment to protect both intranet and extranet apps. Thought for the Day "Never make a technical decision based upon the politics of the situation, and never make a political decision based upon technical issues." — Geoffrey James Source: SoftwareQuotes.com

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• links for 2010-03-31

  - by Bob Rhubart

  Andy Mulholland: Rethinking the narrow and deep expertise model "We increasingly realise that we have to read requirements in a more open way to decide what techniques can be used, what business experience can be added, etc, so the whole idea of encouraging ‘cross’ discipline understanding seems to look increasingly necessary as we look at how technology touches every part of business, and/or any other aspect of life. It is time to rethink the narrow and deep expertise model and consider T-shaped approaches where the depth is complimented by the width to understand how it might be used and how it fits with other capabilities and disciplines too." -- Andy Mulholland (tags: enterprisearchitecture) @vambenepe: Smoothing a discrete world "For the short term (until we sell one) there are three cars in my household. A manual transmission, an automatic and a CVT (continuous variable transmission). This makes me uniquely qualified to write about Cloud Computing." -- William Vambenepe (tags: otn oracle cloud) @fteter: The Price of Progress "I wonder about the price of progress on the business world. Do some of us get attached to old business models or software applications? Do we resist change for the better for emotional reasons? Are we sometimes impediments to progress just because we don't want things to change?" -- Oracle ACE Director Floyd Teter (tags: otn oracle oracleace progress innovation) Pat Shepherd: Enterprise Architecture should not be Arbitrary "If done properly the Business, Application and Information architectures are nailed down BEFORE any technological direction (SOA or otherwise) is set. Those 3 layers and Governance (people and processes), IMHO, are layers that should not vary much as they have everything to do with understanding the business -- from which technological conclusions can later be drawn." - Pat Shepherd, responding to a post by Jordan Braunstein. (tags: oracle otn enterprisearchitecture soa)

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• How to teach Exception Handling for New Programmers?

  - by Kanini

  How do you go about teaching Exception Handling to Programmers. All other things are taught easily - Data Structures, ASP.NET, WinForms, WPF, WCF - you name it, everything can be taught easily. With Exception Handling, teaching them try-catch-finally is just the syntactic nature of Exception Handling. What should be taught however is - What part of your code do you put in the try block? What do you do in the catch block? Let me illustrate it with an example. You are working on a Windows Forms Project (a small utility) and you have designed it as below with 3 different projects. UILayer BusinessLayer DataLayer If an Exception (let us say of loading an XDocument throws an exception) is raised at DataLayer (the UILayer calls BusinessLayer which in turns calls the DataLayer), do you just do the following //In DataLayer try { XDocument xd_XmlDocument = XDocument.Load("systems.xml"); } catch(Exception ex) { throw ex; } which gets thrown again in the BusinessLayer and which is caught in UILayer where I write it to the log file? Is this how you go about Exception Handling?

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• Java’s Aromatic Message

  - by Kristin Rose

  Normal 0 false false false EN-US X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Kicking off day 4 of Oracle OpenWorld with a hot cup of Java has never tasted so good! The Java Exchange @ JavaOne keynote took place this morning and covered topics such as M2M and marketing strategy. Senior Vice President of Oracle's Worldwide Alliances and Channels, Judson Althoff, discussed how Java’s device to data center reach offers customers and partners across a range of industries, significant business advantages by minimizing development costs, testing cycles, and time-to-market while maximizing application reuse, solution flexibility and end-to-end security. All in all, each presenter offered interesting insight into how Java is affecting the world we live in today, as well as how it will affect us in the future. With the potential of 50 billion connected devices by 2020, the world of embedded Java is calling and we need to answer! Can We Refill Your Java? The OPN Communications Team

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• Slick2D + LWJGL collision system

  - by Connor W

  So I've been learning java for a while and have explored slick and lwjgl before but went away from using Slick for a while. But I've recently gone back to using it (as I'm making a platformer and Tiled will be really helpful). But here's where my problems begin: collision. I have a player polygon and I check to see if it's colliding with my tiled map with this method: public static boolean playerCollisionWith() { for(int i = 0; i < Blockmap.entities.size(); i++) { Block entity1 = (Block) Blockmap.entities.get(i); if(playerPoly.intersects(entity1.poly)) { return true; } } return false; } This would work normally but I'm using a different method for movement. Instead of just adding a speed variable to the player's x axis. I move like this: if(Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) { speedX = Math.min(5, speedX + 1); moving = true; playerPoly.setX(x); if(playerCollisionWith()) { speedX = -5; playerPoly.setX(x); } } That Math.min call is what is messing me up =. I can't just call speedX = -5, because when I do the player "bounces" when the right mouse button is down and it's colliding. Bounces as in flashes back and forth REALLY quickly. But I don't really know how I would make it so that collisions on the y axis would work either, whether the player is jumping or not. So if I could get some help with how to fix this problem that would be great. Thank you for the help!

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• 2D non-tile based map editor

  - by user5468

  I am currently developing a relatively simple 2D, topdown oriented adventure game for the iPhone and was wondering what would be the easiest way to create the maps for my game. I figured I would need some kind of visual editor that would give me immediate feedback and would allow me to place all objects in the world exactly where I want them. I could then load the saved representation of the world I create in the editor in my game. So, I am looking for a simple map editor that allows me to do this. All the objects in my game are simply textured rectangles build up from two triangles. All I need to be able to do is position different rectangles/objects in the map, and give them a texture. I am using texture atlases, so it would be useful to be able to assign portions of textures to the objects. I then need to be able to extract all the objects from the saved representation of my maps, together with the name/identifier of the texture(atlas) they use, and the area of the texture atlas. I have looked at some tile-based map editors like Tiled and Ogmo, but they don't seem to be able to do what I want. Any suggestions? EDIT: a more concrete example: something like the GameMaker level editor, but then with added export functionality in a handy format.

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• Best practice settings Effect parameters in XNA

  - by hichaeretaqua

  I want to ask if there is a best practice settings effect parameters in XNA. Or in other words, what exactly happens when I call pass.Apply(). I can imagine multiple scenarios: Each time Apply() is called, all effect parameters are transferred to the GPU and therefor it has no real influence how often I set a parameter. Each time Apply() is called, only the parameters that got reset are transferred. So caching Set-operations that don't actually set a new value should be avoided. Each time Apply() is called, only the parameters that got changed are transferred. So caching Set-operations is useless. This whole questions is bootless because no one of the mentions ways has any noteworthy impact on game performance. So the final question: Is it useful to implement some caching of Set-operation like: private Matrix _world; public Matrix World { get{ return _world;} set { if(value == world)return; _effect.Parameters["xWorld"].SetValue(value); _world = value; } Thanking you in anticipation

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• Introducing the Industry's First Analytics Machine, Oracle Exalytics

  - by Manan Goel

  Analytics is all about gaining insights from the data for better decision making. The business press is abuzz with examples of leading organizations across the world using data-driven insights for strategic, financial and operational excellence. A recent study on “data-driven decision making” conducted by researchers at MIT and Wharton provides empirical evidence that “firms that adopt data-driven decision making have output and productivity that is 5-6% higher than the competition”. The potential payoff for firms can range from higher shareholder value to a market leadership position. However, the vision of delivering fast, interactive, insightful analytics has remained elusive for most organizations. Most enterprise IT organizations continue to struggle to deliver actionable analytics due to time-sensitive, sprawling requirements and ever tightening budgets. The issue is further exasperated by the fact that most enterprise analytics solutions require dealing with a number of hardware, software, storage and networking vendors and precious resources are wasted integrating the hardware and software components to deliver a complete analytical solution. Oracle Exalytics In-Memory Machine is the world’s first engineered system specifically designed to deliver high performance analysis, modeling and planning. Built using industry-standard hardware, market-leading business intelligence software and in-memory database technology, Oracle Exalytics is an optimized system that delivers answers to all your business questions with unmatched speed, intelligence, simplicity and manageability. Oracle Exalytics’s unmatched speed, visualizations and scalability delivers extreme performance for existing analytical and enterprise performance management applications and enables a new class of intelligent applications like Yield Management, Revenue Management, Demand Forecasting, Inventory Management, Pricing Optimization, Profitability Management, Rolling Forecast and Virtual Close etc. Requiring no application redesign, Oracle Exalytics can be deployed in existing IT environments by itself or in conjunction with Oracle Exadata and/or Oracle Exalogic to enable extreme performance and best in class user experience. Based on proven hardware, software and in-memory technology, Oracle Exalytics lowers the total cost of ownership, reduces operational risk and provides unprecedented analytical capability for workgroup, departmental and enterprise wide deployments. Click here to learn more about Oracle Exalytics.  

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• Did the developers of Java conciously abandon RAII?

  - by JoelFan

  As a long-time C# programmer, I have recently come to learn more about the advantages of Resource Acquisition Is Initialization (RAII). In particular, I have discovered that the C# idiom: using (my dbConn = new DbConnection(connStr) { // do stuff with dbConn } has the C++ equivalent: { DbConnection dbConn(connStr); // do stuff with dbConn } meaning that remembering to enclose the use of resources like DbConnection in a using block is unnecessary in C++ ! This seems to a major advantage of C++. This is even more convincing when you consider a class that has an instance member of type DbConnection, for example class Foo { DbConnection dbConn; // ... } In C# I would need to have Foo implement IDisposable as such: class Foo : IDisposable { DbConnection dbConn; public void Dispose() { dbConn.Dispose(); } } and what's worse, every user of Foo would need to remember to enclose Foo in a using block, like: using (var foo = new Foo()) { // do stuff with "foo" } Now looking at C# and its Java roots I am wondering... did the developers of Java fully appreciate what they were giving up when they abandoned the stack in favor of the heap, thus abandoning RAII? (Similarly, did Stroustrup fully appreciate the significance of RAII?)

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• Getting Optimal Performance from Oracle E-Business Suite

  - by Steven Chan (Oracle Development)

  Performance tuning and optimization in E-Business Suite environments can involve many different components and diagnostic tools.  Samer Barakat, Senior Architect in our Applications Performance group, held an OpenWorld 2013 session that covered: Performance triage, analysis and diagnostic tools Optimizing the E-Business Suite application tier, including Concurrent Manager Optimizing the E-Business Suite database tier Optimizing the E-Business Suite on Real Application Clusters (RAC) E-Business Suite on engineered systems, including Exadata and Exalogic Optimizing E-Business Suite data management, including archiving and purging  The Applications Performance group works with the world's largest E-Business Suite customers to isolate and resolve performance bottlenecks. This team has helped tune the E-Business Suite environments of world's largest companies to handle staggering amounts of transactional volume in multi-terabyte databases.  This group also publishes our official Oracle Apps benchmarks, white papers, and performance metrics. This is an essential set of tips and techniques that all EBS sysadmins and DBAs can use to improve the performance of their environments: Getting Optimal Performance from Oracle E-Business Suite (PDF, 1.7 MB) OpenWorld 2013 presentations are only available for approximately six months -- until ~March 2013.  Download this one while it's still available. Related Articles E-Business Suite Technology Sessions at OpenWorld 2013 OAUG/Collaborate Recap: Best Practices for E-Business Suite Performance Tuning

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• Learning to code first game, few questions on basic game development and 3D

  - by ProgrammerByDay

  I've been programming for a while, and I'm concurrently learning how to make a basic game and slimdx, and wanted to talk to someone to hopefully get a few pointers. I've read that Tetris is the "Hello, world" of game programming, which made sense to me, so I decided to give it a shot. I've been able to code up a basic version in a few hours, which I'm quite happy with, but I had a few questions about 3D programming. Right now I'm using Direct3D to do display the blocks without any textures (just colored squares). I have a data structure (2d array of bytes, where each byte denotes the presence of a block and its color) which is the "game board," and on every render() call I create a new vertex buffer of the existing squares in the game board, and draw those primitives. This feels very inefficient, and I wondering what would be the idiomatic way of doing this in a 3D world, with matrix/rotations/translation operations. I know 3D is overkill for such a project, but I want to learn any 3d concepts that I can while I'm doing it. I understand that what you'd usually want to do is keep the same vertices/vertex buffers but manipulate them with matrices to achieve rotations/translations, etc. To do so, I assume what would happen is I'd have one vertex buffer for the "active" piece, since that'll be constantly rotated and moved, and have one vertex buffer for the frozen pieces on the bottom of the board, which is pretty much stationary, but will need to be changed/recreated when the active piece becomes frozen. Right now I'm just clearing and redrawing on every render call, which seems like the easiest way to do things, although I wonder if there's a more efficient way to deal with changes. Obviously there are a lot of questions I'm asking here, but if you can even just point me a step or two ahead in terms of how I should be thinking, it'd be great. Thanks

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• Textures quality issues with Libgdx

  - by user1876708

  I have drawn several vector objets and characters ( in Adobe Illustrator ) for my game on Android. They are all scalable at any size without any quality losses ( of course it's vector ^^ ). I have tried to simulate my gameboard directly on Illustrator just before setting my assests on libdgx to implement them in my game. I set all the objects at the good size, so that they fit perfectly on my XHDPI device I am running my test on. As you can see it works great ( for me at least ^^ ), the PNG quality is good for me, as expected ! So I have edited all my PNG at this size, set my assets on libgdx and build my game apk. And here is a screenshot of my gameboard ( don't pay attention at the differences of placing and objects, but check at the objets presents on both screenshot ). As you can see, I have a loss of my PNG quality in the game. It can be seen clealry on the hedgehog PNG, but also ( but not as obvious ) on the mushroom ( check at the outline ) and the hole PNG. If you really pay attention, on every objects, you can see pixels that are not visible on my first screenshot. And I just can't figure out why this is happening Oo If you have any ideas, you are very welcome ! Thanks. PS : You can check more clearly the 2 gameboard on this two links ( look at them at 100%, display at high resolution ) : Good quality link, from Illustrator Poor quality link, from the game Second phase of tests : We display an object ( the hedgehog ) on our main menu screen to see how it looks like. The things is that it looks like he is suppose to, which means, high quality with no pixels. The hedgehog PNG is coming from an atlas : layer.addActor(hedgehog); No loss of quality with this method So we think the problem is comming from the method we are using to display it on our gameboard : blocks[9][3] = new Block(TextureUtils.hedgehog, new Vector2(9, 3)); the block is getting the size from the vector we are associating to it, but we have a loss of quality with this method.

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• JavaOne+Develop vs Oracle OpenWorld

  - by Rick Ramsey

  http://cheapoair.wordpress.com/2009/03/24/san-francisco-napa-and-sonoma-a-first-visit/ This year, Oracle OpenWorld will be held Sep 19-23rd in San Francisco. Also this year, JavaOne+Develop will be held Sep 19-23d in San Francisco. How can that be? Simple. Oracle has acquired the city of San Francisco. OK, not all of it. But an awful lot of it. And it didn't actually acquire the city of San Francisco. It just sorta borrowed it. So, Oracle OpenWorld The world's most important developer conferences are creating the world's coolest neighborhood The Zone--San Francisco's Hotel Nikko, Hilton San Francisco, and Parc 55 hotels and the surrounding area--will be dedicated to developers during the week of JavaOne + Develop. Unparalleled education and practical hands-on sessions, engaging activities, exceptional entertainment, and food and drink in the Zone will be exclusively geared toward the developer community converging at JavaOne + Develop. Network, share information, and learn from leading experts in the Java, PL/SQL, rich internet application development, SOA communities, and more. Forget the business casual dress code and golf simulation: The Zone does things the developers' way. See for yourself, September 19 - 23, 2010. Participate in dozens of hands-on labs, including Oracle Database, Oracle Application Express, Oracle WebLogic Server, Java, SOA, .NET, Oracle JDeveloper, Eclipse, Oracle Solaris Studio, and application grid technologies The Develop 2010 call for papers is now closed. Review and selection is under way, and we expect to notify presenters by mid-May, 2010. If the submissions we've received are any indication, you can look forward to an outstanding developer conference this year in San Francisco. Thanks to all of you who contributed papers by the March 21 deadline.

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• Inconsistent movement / line-of-sight around obstacles on a hexagonal grid

  - by Darq

  In a roguelike game I've been working on, one of my core design goals has been to allow the player to "Play the game, not the grid." In essence, I want the player's positioning to be tactical because of elements in the game world, not simply because some grid tiles are more advantageous than others, in relation to enemies. I am fine with world geometry not being realistic, but it needs to be consistent. In this process I have ran into most of the common problems (Square tiles? Diagonal movement, LOS, corner cases, etc.) and have moved to a hexagonal tile grid. For the most part this has been great, and I've not had too many inconsistencies. Recently however I have been stumped by the following: Points A and B are both distance 4 from the player (red lines). Line-of-sight to both are blocked by walls (black tiles). However, due to the hexagonal grid, A can be reached in 4 moves, whereas B requires 5 moves (blue lines). On a hex grid, "shortest path" seems divorced from "direct path", there may be multiple shortest paths to any point, but there is only one direct path (or two in some situations). This is fine, geometry need not be realistic. However this also seems inconsistent, similar obstacles are more effective in some positions than in others. A player running away from an enemy should be able to run in any direction, increasing the distance between the two actors. However when placing obstacles or traps between themselves and enemies, the player is best served by running in one of the six directions that don't have multiple shortest paths. Is there a way to rationalise this? Am I missing something that makes this behaviour consistent? Or is there a way to make this behaviour consistent? I am most certainly over-thinking this, but as it is one of my goals, I should do it due diligence.

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• How can I test if an oriented rectangle contains another oriented rectangle?

  - by gronzzz

  I have the following situation: To detect whether is the red rectangle is inside orange area I use this function: - (BOOL)isTile:(CGPoint)tile insideCustomAreaMin:(CGPoint)min max:(CGPoint)max { if ((tile.x < min.x) || (tile.x > max.x) || (tile.y < min.y) || (tile.y > max.y)) { NSLog(@" Object is out of custom area! "); return NO; } return YES; } But what if I need to detect whether the red tile is inside of the blue rectangle? I wrote this function which uses the world position: - (BOOL)isTileInsidePlayableArea:(CGPoint)tile { // get world positions from tiles CGPoint rt = [[CoordinateFunctions shared] worldFromTile:ccp(24, 0)]; CGPoint lb = [[CoordinateFunctions shared] worldFromTile:ccp(24, 48)]; CGPoint worldTile = [[CoordinateFunctions shared] worldFromTile:tile]; return [self isTile:worldTile insideCustomAreaMin:ccp(lb.x, lb.y) max:ccp(rt.x, rt.y)]; } How could I do this without converting to the global position of the tiles?

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• C#.NET (AForge) against Java (JavaCV, JMF) for video processing

  - by Leron

  I'm starting to get really confused looking deeper and deeper at video processing world and searching for optimal choices. This is the reason to post this and some other questions to try and navigate myself in the best possible way. I really like Java, working with Java, coding with Java, at the same time C# is not that different from Java and Visual Studio is maybe the best IDE I've been working with. So even though I really want to do my projects in Java so I can get better and better Java programmer at the same time I'm really attract to video processing and even though I'm still at the beginning of this journey I want to take the right path. So I'm really in doubt could Java be used in a production environment for serious video processing software. As the title says I already have been looking at maybe the two most used technologies for video processing in Java - JMF and JavaCV and I'm starting to think that even they are used and they provide some functionality, when it comes to real work and real project that's not the first thing that comes to once mind, I mean to someone that have a professional opinion about this. On the other hand I haven't got the time to investigate .NET (c# specificly) options but even AForge looks a lot more serious library then those provided for Java. So in general -either ways I'm gonna spend a lot of time learning some technology and trying to do something that make sense with it, but my plan is at the end the thing that I'll eventually come up to be my headline project. To represent my skills and eventually help me find a job in the field. So I really don't want to spend time learning something that will give me the programming result I want but at the same time is not something that is needed in the real world development. So what is your opinion, which language, technology is better for this specific issue. Which one worths more in terms that I specified above?

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• converting a mouse click to a ray

  - by Will

  I have a perspective projection. When the user clicks on the screen, I want to compute the ray between the near and far planes that projects from the mouse point, so I can do some ray intersection code with my world. I am using my own matrix and vector and ray classes and they all work as expected. However, when I try and convert the ray to world coordinates my far always ends up as 0,0,0 and so my ray goes from the mouse click to the centre of the object space, rather than through it. (The x and y coordinates of near and far are identical, they differ only in the z coordinates where they are negatives of each other) GLint vp[4]; glGetIntegerv(GL_VIEWPORT,vp); matrix_t mv, p; glGetFloatv(GL_MODELVIEW_MATRIX,mv.f); glGetFloatv(GL_PROJECTION_MATRIX,p.f); const matrix_t inv = (mv*p).inverse(); const float unit_x = (2.0f*((float)(x-vp[0])/(vp[2]-vp[0])))-1.0f, unit_y = 1.0f-(2.0f*((float)(y-vp[1])/(vp[3]-vp[1]))); const vec_t near(vec_t(unit_x,unit_y,-1)*inv); const vec_t far(vec_t(unit_x,unit_y,1)*inv); ray = ray_t(near,far-near); What have I got wrong? (How do you unproject the mouse-point?)

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• See the Lord of the Rings Epic from the Perspective of Mordor [eBook]

  - by ETC

  Much like the wildly popular book “Wicked” mixed up the good/bad dichotomy in the Wizard of Oz, “The Last Ring-Bearer” shows us the Mordor’s take on the Lord of the Rings. The work of a Russian paleontologist, Kirill Yeskov, “The Last Ring-Bearer” frames the conflict in the Lord of the Rings from the perspective of the citizens of Mordor. Salon magazine offers this summary, as part of their larger review: In Yeskov’s retelling, the wizard Gandalf is a war-monger intent on crushing the scientific and technological initiative of Mordor and its southern allies because science “destroys the harmony of the world and dries up the souls of men!” He’s in cahoots with the elves, who aim to become “masters of the world,” and turn Middle-earth into a “bad copy” of their magical homeland across the sea. Barad-dur, also known as the Dark Tower and Sauron’s citadel, is, by contrast, described as “that amazing city of alchemists and poets, mechanics and astronomers, philosophers and physicians, the heart of the only civilization in Middle-earth to bet on rational knowledge and bravely pitch its barely adolescent technology against ancient magic.” Hit up the link below to grab a PDF of the official English translation of Yeskov’s work. The Last Ring-Bearer [via Salon] Latest Features How-To Geek ETC How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions How to Enable User-Specific Wireless Networks in Windows 7 How to Use Google Chrome as Your Default PDF Reader (the Easy Way) How To Remove People and Objects From Photographs In Photoshop Ask How-To Geek: How Can I Monitor My Bandwidth Usage? Internet Explorer 9 RC Now Available: Here’s the Most Interesting New Stuff Lucky Kid Gets Playable Angry Birds Cake [Video] See the Lord of the Rings Epic from the Perspective of Mordor [eBook] Smart Taskbar Is a Thumb Friendly Android Task Launcher Comix is an Awesome Comics Archive Viewer for Linux Get the MakeUseOf eBook Guide to Speeding Up Windows for Free Need Tech Support? Call the Star Wars Help Desk! [Video Classic]

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• How do I get a rt2800usb wireless device working?

  - by Jii

  My brand new desktop running 13.04 has endless problems with wireless. Dozens of others are flooding forums with reports of the same problems. It worked fine for a few days, then there were a few days where it started having problems sometimes and working sometimes. Now it never works at all. I have 5+ devices all able to connect without any trouble at all, including iPhone, Android phone, 3DS, multiple game consoles, a laptop running windows 7, and even a second desktop machine running Ubuntu 12.04 sitting right behind the 13.04 machine. All other devices have full wireless bars displayed (strong signals). At any moment, one of the following is happening, and it changes randomly: Trying to connect forever, but never establishing a connection. Wireless icon constantly animating. Finds no wireless networks at all. (There are 12+ in range according to other devices.) Will not try to connect to the network. If I use the icon to connect, it will display "Disconnected" within a few seconds. Will continuously ask for the network password. Typing it in correctly does not help. Wireless is working fine. This happens sometimes. It can work for days at a time, or only 10 mins at a time. Various things that usually do nothing but sometimes fix the problem: Reboot. This has the best chance of helping, but it usually takes 5+ times. Disable/re-enable Wi-Fi using the wireless icon. Disable/re-enable Networking using the wireless icon. Use the icon to try and connect to a network (if found). Use the icon to open Edit Connections and delete my connection info, causing it to be recreated (once it's actually found again). Various things that seem to make no difference: Changing between using Linux headers in grub at bootup, between 3.10.0, 3.9.0, or 3.8.0. Move the wireless router very close to the desktop. Running sudo rfkill unblock all (I dunno what this is supposed to do.) I've used Ubuntu for 6 years and I've never had a problem with networking. Now I'm spending all my time reading through endless problem reports and trying all the answers. None of them have helped. I am doing this instead of getting work done, which is defeating the whole purpose of using Ubuntu. It's heartbreaking to be honest. In the current state of "no networks are showing up", here are outputs from the random things that other people are usually asked to run: lspic 00:00.0 Host bridge: Intel Corporation Haswell DRAM Controller (rev 06) 00:01.0 PCI bridge: Intel Corporation Haswell PCI Express x16 Controller (rev 06) 00:14.0 USB controller: Intel Corporation Lynx Point USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation Lynx Point MEI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-V (rev 04) 00:1a.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation Lynx Point High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #1 (rev d4) 00:1c.2 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d4) 00:1d.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Lynx Point LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation Lynx Point 6-port SATA Controller 1 [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation Lynx Point SMBus Controller (rev 04) 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 610] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1) 03:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge (rev 03) lsmod Module Size Used by e100 41119 0 nls_iso8859_1 12713 1 parport_pc 28284 0 ppdev 17106 0 bnep 18258 2 rfcomm 47863 12 binfmt_misc 17540 1 arc4 12573 2 rt2800usb 27201 0 rt2x00usb 20857 1 rt2800usb rt2800lib 68029 1 rt2800usb rt2x00lib 55764 3 rt2x00usb,rt2800lib,rt2800usb coretemp 13596 0 mac80211 656164 3 rt2x00lib,rt2x00usb,rt2800lib kvm_intel 138733 0 kvm 452835 1 kvm_intel cfg80211 547224 2 mac80211,rt2x00lib crc_ccitt 12707 1 rt2800lib ghash_clmulni_intel 13259 0 aesni_intel 55449 0 usb_storage 61749 1 aes_x86_64 17131 1 aesni_intel joydev 17613 0 xts 12922 1 aesni_intel nouveau 1001310 3 snd_hda_codec_hdmi 37407 1 lrw 13294 1 aesni_intel gf128mul 14951 2 lrw,xts mxm_wmi 13021 1 nouveau snd_hda_codec_realtek 46511 1 ablk_helper 13597 1 aesni_intel wmi 19256 2 mxm_wmi,nouveau snd_hda_intel 44397 5 ttm 88251 1 nouveau drm_kms_helper 49082 1 nouveau drm 295908 5 ttm,drm_kms_helper,nouveau snd_hda_codec 190010 3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel cryptd 20501 3 ghash_clmulni_intel,aesni_intel,ablk_helper snd_hwdep 13613 1 snd_hda_codec snd_pcm 102477 3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel btusb 18291 0 snd_page_alloc 18798 2 snd_pcm,snd_hda_intel snd_seq_midi 13324 0 i2c_algo_bit 13564 1 nouveau snd_seq_midi_event 14899 1 snd_seq_midi snd_rawmidi 30417 1 snd_seq_midi snd_seq 61930 2 snd_seq_midi_event,snd_seq_midi bluetooth 251354 22 bnep,btusb,rfcomm snd_seq_device 14497 3 snd_seq,snd_rawmidi,snd_seq_midi lpc_ich 17060 0 snd_timer 29989 2 snd_pcm,snd_seq mei 46588 0 snd 69533 20 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec,snd_hda_intel,snd_seq_device psmouse 97838 0 microcode 22923 0 soundcore 12680 1 snd video 19467 1 nouveau mac_hid 13253 0 serio_raw 13215 0 lp 17799 0 parport 46562 3 lp,ppdev,parport_pc hid_generic 12548 0 usbhid 47346 0 hid 101248 2 hid_generic,usbhid ahci 30063 3 libahci 32088 1 ahci e1000e 207005 0 ptp 18668 1 e1000e pps_core 14080 1 ptp sudo lshw -c network 00:00.0 Host bridge: Intel Corporation Haswell DRAM Controller (rev 06) 00:01.0 PCI bridge: Intel Corporation Haswell PCI Express x16 Controller (rev 06) 00:14.0 USB controller: Intel Corporation Lynx Point USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation Lynx Point MEI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation Ethernet Connection I217-V (rev 04) 00:1a.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation Lynx Point High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation Lynx Point PCI Express Root Port #1 (rev d4) 00:1c.2 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d4) 00:1d.0 USB controller: Intel Corporation Lynx Point USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation Lynx Point LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation Lynx Point 6-port SATA Controller 1 [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation Lynx Point SMBus Controller (rev 04) 01:00.0 VGA compatible controller: NVIDIA Corporation GF119 [GeForce GT 610] (rev a1) 01:00.1 Audio device: NVIDIA Corporation GF119 HDMI Audio Controller (rev a1) 03:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge (rev 03) sudo iwconfig eth0 no wireless extensions. lo no wireless extensions. wlan0 IEEE 802.11bgn ESSID:off/any Mode:Managed Access Point: Not-Associated Tx-Power=20 dBm Retry long limit:7 RTS thr:off Fragment thr:off Encryption key:off Power Management:on sudo iwlist scan eth0 Interface doesn't support scanning. lo Interface doesn't support scanning. wlan0 No scan results NOTE: This dmesg was done after a reboot where the network manager was continuously displaying the "disconnected" message over and over. So it must have been trying to connect at this time. My network was displayed in the list of options, as the only option despite other devices picking up 12+ access points. The router channel is set to auto. dmesg | tail -30 [ 187.418446] wlan0: associated [ 190.405601] wlan0: disassociated from 00:14:d1:a8:c3:44 (Reason: 15) [ 190.443312] cfg80211: Calling CRDA to update world regulatory domain [ 190.443431] wlan0: deauthenticating from 00:14:d1:a8:c3:44 by local choice (reason=3) [ 190.451635] cfg80211: World regulatory domain updated: [ 190.451643] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [ 190.451648] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 190.451652] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [ 190.451656] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [ 190.451659] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 190.451662] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 191.824451] wlan0: authenticate with 00:14:d1:a8:c3:44 [ 191.850608] wlan0: send auth to 00:14:d1:a8:c3:44 (try 1/3) [ 191.884604] wlan0: send auth to 00:14:d1:a8:c3:44 (try 2/3) [ 191.886309] wlan0: authenticated [ 191.886579] rt2800usb 3-5.3:1.0 wlan0: disabling HT as WMM/QoS is not supported by the AP [ 191.886588] rt2800usb 3-5.3:1.0 wlan0: disabling VHT as WMM/QoS is not supported by the AP [ 191.889556] wlan0: associate with 00:14:d1:a8:c3:44 (try 1/3) [ 192.001493] wlan0: associate with 00:14:d1:a8:c3:44 (try 2/3) [ 192.040274] wlan0: RX AssocResp from 00:14:d1:a8:c3:44 (capab=0x431 status=0 aid=3) [ 192.044235] wlan0: associated [ 193.948188] wlan0: deauthenticating from 00:14:d1:a8:c3:44 by local choice (reason=3) [ 193.981501] cfg80211: Calling CRDA to update world regulatory domain [ 193.984080] cfg80211: World regulatory domain updated: [ 193.984082] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp) [ 193.984084] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 193.984085] cfg80211: (2457000 KHz - 2482000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [ 193.984085] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm) [ 193.984086] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) [ 193.984087] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm) The router uses MAC filtering, and security is WPA PSK with cipher as auto. So, any ideas? Or is the solution just to not use 13.04 unless you have a wired connection? (I don't have this option.) If so, please just tell me straight. I survived 9.04 Jaunty, and I can survive 13.04 Raring. Update #1 Results from trying Wild Man's first answer: jii@conan:~$ echo "options rt2800usb nohwcrypt=y" | sudo tee /etc/modprobe.d/rt2800usb.conf options rt2800usb nohwcrypt=y jii@conan:~$ sudo modprobe -rfv rt2800usb rmmod rt2800usb rmmod rt2800lib rmmod crc_ccitt rmmod rt2x00usb rmmod rt2x00lib rmmod mac80211 rmmod cfg80211 jii@conan:~$ sudo modprobe -v rt2800usb insmod /lib/modules/3.10.0-031000-generic/kernel/lib/crc-ccitt.ko insmod /lib/modules/3.10.0-031000-generic/kernel/net/wireless/cfg80211.ko insmod /lib/modules/3.10.0-031000-generic/kernel/net/mac80211/mac80211.ko insmod /lib/modules/3.10.0-031000-generic/kernel/drivers/net/wireless/rt2x00/rt2x00lib.ko insmod /lib/modules/3.10.0-031000-generic/kernel/drivers/net/wireless/rt2x00/rt2800lib.ko insmod /lib/modules/3.10.0-031000-generic/kernel/drivers/net/wireless/rt2x00/rt2x00usb.ko insmod /lib/modules/3.10.0-031000-generic/kernel/drivers/net/wireless/rt2x00/rt2800usb.ko nohwcrypt=y I tried: gksudo gedit /etc/pm/power.d/wireless but I didn't have the package. It said to install gksu. I tried that, but of course, not having Internet, I didn't get the package. So instead I did: sudo gedit /etc/pm/power.d/wireless Which created the file. Here is the body: #!/bin/sh /sbin/iwconfig wlan0 power off I then rebooted. No change. I tried adding exit 0 to the bottom of the wireless file, and rebooted. No change. Please note that this is a desktop machine. I'm assuming power management is primarily for laptops, but the iwconfig does state that power management is on, so who knows. The recommended router changes I did not do, since the current router settings are (I think) required for some of the older devices I have, and because the current settings work on all my modern devices including Ubuntu 12.04 and Windows 7. I do appreciate the advice though, and I'll look into it when I have time. Anything else to try? Update #2 I booted into Ubuntu 12.04.3 from a dvd, and the same problems exist. I have a separate old desktop machine with 12.04 installed that has no wireless problems at all. So obviously the problem is wireless hardware compatibility in both 12.04.03 LTS and 13.04. Update #3 The same problems exist even when using a wired connection. I plugged an ethernet cable directly to the router and the network manager added an "Auto Ethernet" entry, but it cannot establish a connection to it. So the problem is not specific to wireless. Meanwhile, I purchased a Trendnet N300 wireless USB adapter, TEW-664UB. I plugged it in, but I have no idea how to get Ubuntu to try and use it. Can anyone tell me how? Can I download a package on another computer and copy the .deb over to do an install, etc? I'm installing windows 7 to double check that the internet connection works there and it's not just some magically faulty hardware. Thanks for your help.

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• Attend MySQL Webinars This Week

  - by Bertrand Matthelié

  Interested in learning more about MySQL as embedded database? In building highly available MySQL applications with MySQL and DRBD? Join our webinars this week! All information below. Tuesday next week (November 20) we will provide an update about what's new in MySQL Enterprise Edition. We have live Q&A during the webinars so you'll get the chance to ask all your questions. Top 10 Reasons to Use MySQL as an Embedded Database Tuesday, November 13 9:00 a.m. PT Review the top 10 reasons why MySQL is technically well-suited for embedded use, as well as the related business reasons vendors choose MySQL initially, over time, and across product-lines. Register for the Webcast. MySQL High Availability with Distributed Replicated Block Device Thursday, November 15 9:00 a.m. PT Learn how to build highly available services with MySQL and distributed replicated block device (DRBD). The DRBD high-availability solution comprises a complete stack of open source software that delivers high-availability database clusters on commodity hardware, with the option of 24/7 support from Oracle. Register for the Webcast. Technology Update: What's New in MySQL Enterprise Edition Tuesday, November 20 9:00 a.m. PT Find out what's new in MySQL Enterprise Edition. Register for the Webcast.

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