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• OWB/ODI Users: Last Chance to Submit and Vote On Sessions for OpenWorld 2010

  - by antonio romero

  Now is the last chance for OWB and ODI users to propose new ETL/DW/DI sessions for OpenWorld! Oracle OpenWorld 2010 "Suggest a Session" lets members of the Oracle Mix community submit and vote on papers/talks for OpenWorld. The most popular session proposals will be included in the conference program. One promising OWB-related topic has already been submitted: Case Study: Real-Time Data Warehousing and Fraud Detection with Oracle 11gR2 Dr. Holger Friedrich and consultants from sumIT AG in Switzerland built a real-time data warehouse and accompanying BI system for real-time online fraud detection with very limited resources and a short schedule. His presentation will cover: How sumIT AG efficiently loads complex data feeds in real time in Oracle 11gR2 using, among others, Advanced Queues and XML DB How they lowered costs and sped up development, by leveraging the DBs development features including Oracle Warehouse Builder How they delivered a production-ready solution in a few short months using only three part-time developers Come vote for this proposal, on Oracle Mix: https://mix.oracle.com/oow10/proposals/10566-case-study-real-time-data-warehousing-and-fraud-detection-with-oracle-11gr2  I have already invited members of the OWB/ODI Linkedin group (with over 1400 members) to come vote on topics like this one and propose their own. If enough of us vote on a few topics, we are sure to get some on the agenda!  And if you have your own topics, using the Suggest-a-Session instructions here: http://wiki.oracle.com/page/Oracle+OpenWorld+2010+Suggest-a-Session If you propose a topic, don't forget to come to Linkedin and promote it! I have already sent the members of the Linkedin group an email announcement about this, and I will send another in a week, with links to all topics submitted. Thanks, all!

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• How Do I Print Photos?

  - by Takkat

  Other than for Windows in Ubuntu there are no fancy utilities provided from printer manufacturers to print photos. I am aware of Gnome Photo Printer and of Photoprint, the first being easy to handle, the latter having more options. However I wonder if there are any other or maybe even better alternatives (including plugins) to perform the following tasks: Print photos in the best photo-resolution the driver offers Adjust paper size for standard values of photo papers Choose paper tray if the printer has more than one Print out multiple photos on one page including mixed sizes (grids) Multiple prints with same settings Borderless printing if the printer is capable of this Any additional options like pre-processing for color correction or noise reduction would be nice to have but are not so essential. Update According to this spec it seems not to so easy to accomplish the simple task of printing photos. Indeed all applications I have gone through have major drawbacks that make printing photos almost impossible. Below I will list what put me off using them for photo printing: Gnome Photo Printer: no thumbnails, no grids Photoprint: does not keep settings, GUI broken, no standard photo size, no thumbs Eye Of Gnome: no multiple pages, no grids Gimp + Images Grid Layout: far too many steps to finally find that prints are always different to their previews. F-Spot: no grids Picasa 3: no grids, very few fixed paper sizes, 300 dpi only flPhoto: strange GUI, no thumbs, no printer settings, did not print at all Windows: Ooops - everything works fine! But I want Ubuntu to do this! After half a pack of ink cartridges and half a pack of photo paper cards I am getting tired of testing. At least Gimp and Picasa looked promising but both don't keep their promise when it comes to printing. I'd already be happy to quickly print a few photos with EOG if bug #80220 was fixed - but it's still on "wishlist".

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• How to center and scale Silverlight applications using ViewBox control

  - by Jacek Ciereszko

  There are many ways to make your application scalable in Web Browser window and align it in the center. Usually we use two Grid controls to align and panel control (like Canvas) to scale our apps. Not the best solution <UserControl … >     <Grid x:Name="LayoutRoot" Background="White">         <Grid HorizontalAlignment="Center" VerticalAlignment="Center">             <Canvas x:Name="scalePanel" VerticalAlignment="Top" HorizontalAlignment="Center">                 …             </Canvas>         </Grid>     </Grid> </UserControl>               The example above usually works but there are better ways. How? Use ViewBox. ViewBox control contains scale mechanisms with some stretching options. So ViewBox together with Grid control is all what we need to align and scale our applications. Good solution <UserControl … >     <Grid x:Name="LayoutRoot" Background="White">         <Viewbox>             ...         </Viewbox>     </Grid> </UserControl> How to find ViewBox control For those applications created in Silverlight 4, ViewBox is available in plug-in. For applications created in Silverlight 3 you can find it in Microsoft Silverlight Toolkit. Demo Let’s create a simple application that will contain: Button, TextBlock and red Rectangle. It will also have some Margin settings. This application won’t be in the center of window and it will not scale. <UserControl … >     <Grid x:Name="LayoutRoot">         <Grid Margin="100, 50, 100, 20">                 <StackPanel Orientation="Horizontal">                     <Button Width="100" Height="100" Content="test"/>                     <TextBlock Text="Button" Width="100" Height="100" />                     <Rectangle Width="100" Height="100" Fill="Red"/>                 </StackPanel>         </Grid> </Grid> </UserControl>   Run demo: RUN But If we use ViewBox control, we will got centered and always scaled application.    <Grid x:Name="LayoutRoot">         <Viewbox>             <Grid Margin="100, 50, 100, 20">                     <StackPanel Orientation="Horizontal">                         <Button Width="100" Height="100" Content="test"/>                         <TextBlock Text="bottom" Width="100" Height="100" />                         <Rectangle Width="100" Height="100" Fill="Red"/>                     </StackPanel>             </Grid>         </Viewbox>     </Grid> Link to application: RUN (try to resize application’s window) Link to source code: SilverlightCenterApplication.zip References ViewBox for Silverlight 3 http://silverlight.codeplex.com/    Polish version: http://jacekciereszko.pl/2010/05/jak-wysrodkowac-i-skalowac-aplikacje.html Jacek Ciereszko

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• Strange characters appearing on websites - ASCII? - UNICODE?

  - by Mick

  I have created many very simple pure HTML websites over the years. Most of them appear to work fine most of the time. But there is one recurring problem which I have never quite sorted out involving strange characters. The scenario goes like this: I create the site. I look at it in my browser, everything appears fine. I may look at it a great many times over the coming weeks or months as I make additions here and there. Perhaps on a variety of browsers on a variety of PC's. Then one day I look at the page and see a random sprinkling of white question marks against dark diamond shapes. These might appear where I had expected to see hyphens or quotes or apostrophes. My immediate thought is that my browser got into some strange state because I was looking at some foreign website with strange characters, but I'm never quite sure. I'm left with that nagging feeling that perhaps half the planet is seeing my website with funny question marks all over it. So my question is what's going on? What should I do to ensure that as many people as possible around the world can view my text as I originally intended? Should I be using those special html sequences like &pound; for all non alphanumeric characters? Should I worry at all? Edit: Right now I have the problem occurring on this page: http://www.fullreservebanking.com/papers.htm ... part of it looks like this: I am using FireFox 5 and the character encoding currently appears to be "UNICODE (UTF-8)". I do not remember manually setting the character encoding to anything since installation. I do occasionally look at Japanese websites for work related reasons - though when I do so, I do not manually make any changes to firefox settings. Edit: Now fixed. Web page altered accordingly.

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• Difficulties with rotation of a sprite

  - by Johnny

  I want to program a dolphin that jumps and rotates like a real dolphin. Jumping is not the problem, but I don't know how to make the rotation. At the moment, my dolphin rotates a little weird. But I want that it rotates like a real dolphin does. How can I improve the rotation? public class Game1 : Microsoft.Xna.Framework.Game { GraphicsDeviceManager graphics; SpriteBatch spriteBatch; Texture2D image, water; float Gravity = 5.0F; float Acceleration = 20.0F; Vector2 Position = new Vector2(1200,720); Vector2 Velocity; float rotation = 0; SpriteEffects flip; Vector2 Speed = new Vector2(0, 0); public Game1() { graphics = new GraphicsDeviceManager(this); Content.RootDirectory = "Content"; graphics.PreferredBackBufferWidth = 1280; graphics.PreferredBackBufferHeight = 720; } protected override void Initialize() { base.Initialize(); } protected override void LoadContent() { spriteBatch = new SpriteBatch(GraphicsDevice); image = Content.Load<Texture2D>("cartoondolphin"); water = Content.Load<Texture2D>("background"); flip = SpriteEffects.None; } protected override void Update(GameTime gameTime) { float VelocityX = 0f; float VelocityY = 0f; float time = (float)gameTime.ElapsedGameTime.TotalSeconds; KeyboardState kbState = Keyboard.GetState(); if(kbState.IsKeyDown(Keys.Left)) { rotation = 0; flip = SpriteEffects.None; VelocityX += -5f; } if(kbState.IsKeyDown(Keys.Right)) { rotation = 0; flip = SpriteEffects.FlipHorizontally; VelocityX += 5f; } // jump if the dolphin is under water if(Position.Y >= 670) { if (kbState.IsKeyDown(Keys.A)) { if (flip == SpriteEffects.None) { rotation += 0.01f; VelocityY += 40f; } else { rotation -= 0.01f; VelocityY += 40f; } } } else { if (flip == SpriteEffects.None) { rotation -= 0.01f; VelocityY += -10f; } else { rotation += 0.01f; VelocityY += -10f; } } float deltaY = 0; float deltaX = 0; deltaY = Gravity * (float)gameTime.ElapsedGameTime.TotalSeconds; deltaX += VelocityX * (float)gameTime.ElapsedGameTime.TotalSeconds * Acceleration; deltaY += -VelocityY * (float)gameTime.ElapsedGameTime.TotalSeconds * Acceleration; Speed = new Vector2(Speed.X + deltaX, Speed.Y + deltaY); Position += Speed * (float)gameTime.ElapsedGameTime.TotalSeconds; Velocity.X = 0; if (Position.Y + image.Height/2 > graphics.PreferredBackBufferHeight) Position.Y = graphics.PreferredBackBufferHeight - image.Height/2; base.Update(gameTime); } protected override void Draw(GameTime gameTime) { GraphicsDevice.Clear(Color.CornflowerBlue); spriteBatch.Begin(); spriteBatch.Draw(water, new Rectangle(0, graphics.PreferredBackBufferHeight -100, graphics.PreferredBackBufferWidth, 100), Color.White); spriteBatch.Draw(image, Position, null, Color.White, rotation, new Vector2(image.Width / 2, image.Height / 2), 1, flip, 1); spriteBatch.End(); base.Draw(gameTime); } }

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• Why can't we capture the design of software more effectively?

  - by Ira Baxter

  As engineers, we all "design" artifacts (buildings, programs, circuits, molecules...). That's an activity (design-the-verb) that produces some kind of result (design-the-noun). I think we all agree that design-the-noun is a different entity than the artifact itself. A key activity in the software business (indeed, in any business where the resulting product artifact needs to be enhanced) is to understand the "design (the-noun)". Yet we seem, as a community, to be pretty much complete failures at recording it, as evidenced by the amount of effort people put into rediscovering facts about their code base. Ask somebody to show you the design of their code and see what you get. I think of a design for software as having: An explicit specification for what the software is supposed to do and how well it does it An explicit version of the code (this part is easy, everybody has it) An explanation for how each part of the code serves to achieve the specification A rationale as to why the code is the way it is (e.g., why a particualr choice rather than another) What is NOT a design is a particular perspective on the code. For example [not to pick specifically on] UML diagrams are not designs. Rather, they are properties you can derive from the code, or arguably, properties you wish you could derive from the code. But as a general rule, you can't derive the code from UML. Why is it that after 50+ years of building software, why don't we have regular ways to express this? My personal opinion is that we don't have good ways to express this. Even if we do, most of the community seems so focused on getting "code" that design-the-noun gets lost anyway. (IMHO, until design becomes the purpose of engineering, with the artifact extracted from the design, we're not going to get around this). What have you seen as means for recording designs (in the sense I have described it)? Explicit references to papers would be good. Why do you think specific and general means have not been succesful? How can we change this?

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• [Silverlight] How to watermark a WriteableBitmap with a text

  - by Benjamin Roux

  Hello, In my current project, I needed to watermark a WriteableBitmap with a text. As I couldn’t find anything I decided to create a small extension method to do so. public static class WriteableBitmapEx { /// <summary> /// Creates a watermark on the specified image /// </summary> /// <param name="input">The image to create the watermark from</param> /// <param name="watermark">The text to watermark</param> /// <param name="color">The color - default is White</param> /// <param name="fontSize">The font size - default is 50</param> /// <param name="opacity">The opacity - default is 0.25</param> /// <param name="hasDropShadow">Specifies if a drop shadow effect must be added - default is true</param> /// <returns>The watermarked image</returns> public static WriteableBitmap Watermark(this WriteableBitmap input, string watermark, Color color = default(Color), double fontSize = 50, double opacity = 0.25, bool hasDropShadow = true) { var watermarked = GetTextBitmap(watermark, fontSize, color == default(Color) ? Colors.White : color, opacity, hasDropShadow); var width = watermarked.PixelWidth; var height = watermarked.PixelHeight; var result = input.Clone(); var position = new Rect(input.PixelWidth - width - 20 /* right margin */, input.PixelHeight - height, width, height); result.Blit(position, watermarked, new Rect(0, 0, width, height)); return result; } /// <summary> /// Creates a WriteableBitmap from a text /// </summary> /// <param name="text"></param> /// <param name="fontSize"></param> /// <param name="color"></param> /// <param name="opacity"></param> /// <param name="hasDropShadow"></param> /// <returns></returns> private static WriteableBitmap GetTextBitmap(string text, double fontSize, Color color, double opacity, bool hasDropShadow) { TextBlock txt = new TextBlock(); txt.Text = text; txt.FontSize = fontSize; txt.Foreground = new SolidColorBrush(color); txt.Opacity = opacity; if (hasDropShadow) txt.Effect = new DropShadowEffect(); WriteableBitmap bitmap = new WriteableBitmap((int)txt.ActualWidth, (int)txt.ActualHeight); bitmap.Render(txt, null); bitmap.Invalidate(); return bitmap; } } For this code to run, you need the WritableBitmapEx library. As you can see, it’s quite simple. You just need to call the Watermark method and pass it the text you want to add in your image. You can also pass optional parameters like the color, the opacity, the fontsize or if you want a drop shadow effect. I could have specify other parameters like the position or the the font family but you can change the code if you need to. Here’s what it can give Hope this helps.

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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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• Oracle VM 3: New Patch Set! (or Mega Millions winner?...you decide!..)

  - by Adam Hawley

  Today, my favorite number is 14736185 (despite the fact that it did not win me $249million in the MegaMillions lottery...or did it?)!  Why?  Because it is our latest patch release and it is chock-full of good stuff for the Oracle VM 3.0 user.  Oracle VM support customers can find it on My Oracle Support as patch number 14736185.   This can be installed on Oracle VM 3.0.x systems as an incremental patch on top of 3.0.3, so if you previously ran 3.0.3 GA or updated to 3.0.3 patch 1 ( build 150) this will just apply on top.  We're recommending you update to this patch set at your earliest convenience.  For more details, see below but also see Wim Coekaert's blog with related info here. Oracle VM Manager Update Instructions Oracle VM Manager 3.0.2 or 3.0.3 can be upgraded to this Oracle VM Manager 3.0.3 patch update. Unzip the patch file on the server running Oracle VM Manager and execute the runUpgrader.sh script. # ./runUpgrader.sh Please refer to Oracle VM Installation and Upgrade Guide for details. Upgrade Oracle VM Servers It's highly recommended to update Oracle VM Server 3.0.3 with the latest patch update. Please review Oracle VM 3.0.3 User Guide http://docs.oracle.com/cd/E26996_01/e18549/BABDDEGC.html for specific instructions how to use Yum repository to perform the server update. To receive notification on the software update delivered to Oracle Unbreakable Linux Network (ULN, http://linux.oracle.com) for Oracle VM, you can sign up here http://oss.oracle.com/mailman/listinfo/oraclevm-errata.  Additional Information Oracle VM documentation is available on the Oracle Technology Network (OTN):http://www.oracle.com/technetwork/server-storage/vm/documentation/index.html  Please refer to the Oracle VM 3.0.3 Release Notes for a list of features and known issues. For the latest information, best practices white papers and webinars, please visit http://oracle.com/virtualization

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• ArchBeat Link-o-Rama for 11/11/2011

  - by Bob Rhubart

  3 SOA business cases, explained in a 2-minute elevator speech | Joe McKendrick Impress your CEO — maybe even the CFO — with some quick examples of SOA making a difference to the business. ADF Faces - a logic bomb in the order of bean instantiations | Chris Muir Oracle ACE Director Chris Muir shares the details on "an interesting ADF logic bomb" discovered by one of his colleagues. 5 key trends in cloud computing's future | David Linthicum "'Cloud computing' will become just 'computing' at some point," says Linthicum, "but it will still be around as an approach to computing." What's New with XBRL? | John O'Rourke John O'Rourke shares highlights and key take-aways from the XBRL US Conference in Nashville and the XBRL International Conference in Montreal. Siri-ous Business: Enterprise Apps and Global UX Considerations | Ultan O'Broin Ultan O'Broin ponders "the enterprise applications user experience (UX) implications of Siri" and "the global UX aspects to the Siri potential." These are 11 of my favorite things! | Mike Gerdts Gerdts introduces his 11 favorite things about zones in Solaris 11. The Power of Social Recommendations | Peter Reiser "Do you really want to invest to drive YOUR audience trough public social networks," asks Reiser, "or do you want to have YOUR audience on your own social network which is seamless integrated with your web properties and business applications." Fourth Key Attribute of Cloud Computing - Provisioning | Tom Laszewski "Self-service provisioning of computing infrastructure in a cloud infrastructure is also very desirable as it can cut down the time it takes to deploy new infrastructure for a new application or scale up/down infrastructure for an existing application," says Tom Laszewski. Oracle Utilities Application Framework Whitepaper List as of November 2011 | Anthony Shorten Anthony Shorten shares an updated and nicely detailed list of Oracle Utilities Application Framework white papers. Down from the Tower; Information Integration Conversation; By the Time the Architects get to Phoenix This week on the Oracle Technology Network Architect Home Page.

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• Got a Great Solaris Story to Tell? Come to OpenWorld and Tell It

  - by Larry Wake

  I know there are a lot of Solaris veterans that still haven't experienced the enormousness that is Oracle OpenWorld. Simply put: if you have a chance to go, you should go. You'll learn a lot, and you'll be in one of the greatest cities in the world at the same time. Even better: if you've got something to share, we might be able to get you in for free. Yep, it's that time already: the Call for Papers for this year's OpenWorld (and JavaOne) is open.  But not for long -- you've only got until April 9th to submit your abstract. As a Solaris person, you'll probably be most interested in participating in one of two tracks: SERVER AND STORAGE SYSTEMS: Oracle Solaris ORACLE DEVELOP: Oracle Solaris and Oracle Linux Development All you need to give us right now is a title and an abstract. If your session is accepted, we'll let you know by early June, and you can start to plan to join us in San Francisco from September 30 to October 4. (If you're planning on attending in listen-only mode, be aware that the early registration price is available until March 30.) As is true every year, this is your opportunity to meet the leading Oracle hardware and software engineers, including lots of the Oracle Solaris team, and interact with your peers from all over the world. See you there!

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• ArchBeat Link-o-Rama Top 20 for April 1-9, 2012

  - by Bob Rhubart

  The top 20 most popular items shared via my social networks for the week of April 1 - 8, 2012. Webcast: Oracle Maximum Availability Architecture Best Practices w/Tom Kyte - April 12 Oracle Cloud Conference: dates and locations worldwide Bad Practice Use Case for LOV Performance Implementation in ADF BC | Oracle ACE Director Andresjus Baranovskis How to create a Global Rule that stores a document’s folder path in a custom metadata field | Nicolas Montoya MySQL Cluster 7.2 GA Released How to deal with transport level security policy with OSB | Jian Liang Webcast Series: Data Warehousing Best Practices http://bit.ly/I0yUx1 Interactive Webcast and Live Chat: Oracle Enterprise Manager Ops Center 12c Launch - April 12 Is This How the Execs React to Your Recommendations? | Rick Ramsey Unsolicited login with OAM 11g | Chris Johnson Event: OTN Developer Day: MySQL - New York - May 2 OTN Member discounts for April: Save up to 40% on titles from Oracle Press, Pearson, O'Reilly, Apress, and more Get Proactive with Fusion Middleware | Daniel Mortimer How to use the Human WorkFlow Web Services | Oracle ACE Edwin Biemond Northeast Ohio Oracle Users Group 2 Day Seminar - May 14-15 - Cleveland, OH IOUG Real World Performance Tour, w/Tom Kyte, Andrew Holdsworth, Graham Wood WebLogic Server Performance and Tuning: Part I - Tuning JVM | Gokhan Gungor Crawling a Content Folio | Kyle Hatlestad The Java EE 6 Example - Galleria - Part 1 | Oracle ACE Director Markus Eisele Reminder: JavaOne Call For Papers Closing April 9th, 11:59pm | Arun Gupta Thought for the Day "A distributed system is one in which the failure of a computer you didn't even know existed can render your own computer unusable." — Leslie Lamport

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• Is paper indispensable in a programmer's everyday work?

  - by rwong

  As a programmer who work in a company whose vision is to make paperless office possible, is there any way I can work effectively while using less paper? I can list at least several kinds of papers I use quite often: Paper notebook, on which I do most of the pre-coding design work and ideas Books Temporary printouts of source code, though not so often (in color, with a 6 point font at 600 DPI) Sticky note, to remind myself of things that should be taken care of within a few days On the other hand, I also use a wiki and an office text editor. Once a while I would use a diagramming software to make a few flowcharts. Deeper questions: Is there a relationship between paper use and productivity? How can programmers help save the trees? Is paperless software development fundamentally different from paperless office? Related questions: Do you ever write code with pen and paper, and should we do it more often? What physical tools do you find useful to work as a programmer? What things are essential on a programmer's desk? Stuff every programmer needs while working Additional info, if it helps: Everyone has dual monitors. We have decent project management and issue tracking software (both web-based). Please be constructive. In particular, please give your answer to your peer programmers who wish to be flexible and are willing to change working style in order to become more productive as well as meeting certain their own personal values. Edited: I removed the company's view because it appears to be too flamebait. If you need to see my original words, go to the edit history. Deleted: Doxygen and whiteboard. Reason: disregarding my personal experience with these great tools, we never had to print out anything as a consequence of using/not using them. To see my original words, go to the edit history.

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• Simultaneous AI in turn based games

  - by Eduard Strehlau

  I want to hack together a roguelike. Now I thought about entity and world representation and got to a quite big problem. If you want all the AI to act simultaneously you would normally(in cellular automa for examble) just copy the cell buffer and let all action of indiviual cells depend on the copy. Actions which are not valid anymore after some cell before the cell you are currently operating on changed the original enviourment(blocking the path) are just ignored or reapplied with the "current"(between turns) environment. After all cells have acted you copy the current map to the buffer again. Now for an environment with complex AI and big(datawise) entities the copying would take too long. So I thought you could put every action and entity makes into a que(make no changes to the environment) and execute the whole que after everyone took their move. Every interaction on this que are realy interacting entities, so if a entity tries to attack another entity it sends a message to it, the consequences of the attack would be visible next turn, either by just examining the entity or asking the entity for data. This would remove problems like what happens if an entity dies middle in the cue but got actions or is messaged later on(all messages would go to null, and the messages from the entity would either just be sent or deleted(haven't decided yet) But what would happen if a monster spawns a fireball which by itself tracks the player(in the same turn). Should I add the fireball to the enviourment beforehand, so make a change to the environment before executing the action list or just add the ball to the "need updated" list as a special case so it doesn't exist in the environment and still operates on it, spawing after evaluating the action list? Are there any solutions or papers on this subject which I can take a look at? EDIT: I don't need information on writing a roguelike I need information on turn based ai in respective to a complex enviourment.

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• Subsumption architecture vs. perceptual control theory

  - by Yasir G.

  I'm a new person to AI field and I have to research and compare 2 different architectures for a thesis I'm writing. Before you scream (homework thread), I've been reading on these 2 topics only to find that I'm confusing myself more.. let me first start with stating briefly what I know so far. Subsumption is based on the fact that targets of a system are different in sophistication, thus that requires them to be added as layers, each layer can suppress (modify) the command of the layers below it, and there are inhibitors to stop signals from execution lets say. PCT stresses on the fact that there are nodes to handle environmental changes (negative feedback), so the inputs coming from an environment go through a comparator node and then an action is generated by that node, HPCT or (Hierarchical PCT) is based on nesting these cycles inside each other so a small cycle to avoid crashing would be nested in a more sophisticated cycle that targets a certain location for example. My questions, am I getting this the right way? am I missing any critical understanding about these 2 models? also any idea where I can find simplified explanations for each theory (so far been struggling trying to understand the papers from Google scholar :< ) /Y

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• What is the best way to "carve" a terrain created from a heightmap?

  - by tigrou

  I have a 3d landscape created from a heightmap. I'd like to "carve" some holes in that terrain. That will allow me to create bridges, caverns and tunnels inside it. That operation will be done in the game editor so it doesn't need to be realtime. In the end, rendering is done using traditional polygons. What would be the best/easiest way to do that ? I already think about several solutions : Solution 1 1) Create voxels from the heightmap (very easy). In other words, fill a 3D array like this : voxels[32][32][32] from the heightmap values. 2) Carve holes in the voxels as i want (easy too). 3) Convert voxels to polygons using some iso-surface extraction technique (like marching cubes). 4) Reduce (decimate) polygons created in 3). This technique seems to be the most promising for giving good results (untested). However the problem with marching cubes is that they tends to produce lots of polygons thus reducing them is mandatory. Implementing 4) also seems not trivial, i have read several papers on the web and it seems pretty complex. I was also unable to find an example, code snippet or something to start writing an algorithm for triangle mesh decimation. Maybe there is a special decimation algorithm (simpler) for meshes created from marching cubes ? Solution 2 1) Create some triangle mesh from the heighmap (easy). 2) Apply severals 3D boolean operation (eg: subtraction with a sphere) to carve the mesh. 3) apply some procedure to reduce polygons (optional). Operation 2) seems to be very complex and to be honest i have no idea how to do that. Also applying many boolean operation seems to be slow and will maybe degrade the triangle mesh every time a boolean operation is applied.

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• Are there any "best practices" on cross-device development?

  - by vstrien

  Developing for smartphones in the way the industry is currently doing is relatively new. Of course, there has been enterprise-level mobile development for several decades. The platforms have changed, however. Think of: from stylus-input to touch-input (different screen res, different control layout etc.) new ways of handling multi-tasking on mobile platforms (e.g. WP7's "tombstoning") The way these platforms work aren't totally new (iPhone has been around for quite awhile now for example), but at the moment when developing a functionally equal application for both desktop and smartphone it comes down to developing two applications from ground up. Especially with the birth of Windows Phone with the .NET-platform on board and using Silverlight as UI-language, it's becoming appealing to promote the re-use of (parts of the UI). Still, it's fairly obvious that the needs of an application on a smartphone (or tablet) are very different compared to the needs of a desktop application. An (almost) one-on-one conversion will therefore be impossible. My question: are there "best practices", pitfalls etc. documented about developing "cross-device" applications (for example, developing an app for both the desktop and the smartphone/tablet)? I've been looking at weblogs, scientific papers and more for a week or so, but what I've found so far is only about "migratory interfaces".

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• Is Oracle Policy Automation a Fit for My Agency? I'll bet it is.

  - by jeffrey.waterman

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* 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-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Recently, I stumbled upon a new(-ish) whitepaper now posted on the Oracle Technology Network around Oracle Policy Automation (OPA). This paper is certain to become a must read for any customer interested in rules automation. What is OPA?  If you are not sitting in your favorite Greek restaurant waiting for that order of Saganaki to appear, OPA is Oracle’s solution for automated streamlining, standardizing, and the maintenance of policy. It is a specialized rules platform that simplifies the automation of rules and policies, putting the analysis in the hands of the analysts, not the IT organization. In other words, OPA allows the organization to be more efficient by eliminating (or at a minimum, reducing the engagement of) the middle man from the process. The whitepaper I mention above is titled, “Is Oracle Policy Automation a Good Fit for My Business?”. This short document walks the reader through use cases and advice for the reader to consider when deciding if OPA is right for their agency. The paper outlines many different scenarios, different uses of OPA in production today and, where OPA may not be a good fit. Many of the use case examples revolve around end user questionnaires or analyst research. What is often overlooked is OPA’s ability to act as a rules engine behind the scenes. That is, take inputs from one source (e.g., personnel data), process that data in OPA and send the output (e.g., pay data with benefits deductions) to a second source. The rules have been automated, no necessary human intervention to perform analysis. A few of my customers have used the embedded OPA solution to improve transaction processing and reduce the time spent analyzing exceptions. I suggest any reader whose organization is reliant on or deals with high complexity, volume or volatility in rules that are based on documentation – or which need to be documented – take a look at Oracle Policy Automation. You can find the white paper on Oracle Technology Network. You can find the white paper in the Oracle Policy Automation of the OTN. You can find more information around OPA on oracle.com. Finally, you can send me a question any time at [email protected] Thank you for reading. If you have any topics around Oracle Applications in the Federal or Public Sector industries you would like to see addressed in this blog, please leave suggestions in the comments section and I will do my best to address in a future post.

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• ArchBeat Link-o-Rama for 2012-03-22

  - by Bob Rhubart

  2012 Real World Performance Tour Dates |Performance Tuning | Performance Engineering www.ioug.org Coming to your town: a full day of real world database performance with Tom Kyte, Andrew Holdsworth, and Graham Wood. Rochester, NY - March 8 Los Angeles, CA - April 30 Orange County, CA - May 1 Redwood Shores, CA - May 3. Oracle Cloud Conference: dates and locations worldwide http://www.oracle.com Find the cloud strategy that’s right for your enterprise. 2 new Cloud Computing resources added to free IT Strategies from Oracle library www.oracle.com IT Strategies from Oracle, the free authorized library of guidelines and reference architectures, has just been updated to include two new documents: A Pragmatic Approach to Cloud Adoption Data Sheet: Oracle's Approach to Cloud SOA! SOA! SOA!; OSB 11g Recipes and Author Interviews www.oracle.com Featured this week on the OTN Architect Homepage, along with the latest articles, white papers, blogs, events, and other resources for software architects. Enterprise app shops announcements are everywhere | Andy Mulholland www.capgemini.com Capgemini's Andy Mulholland discusses "the 'front office' revolution using new technologies in a different manner to the standard role of IT and its attendant monolithic applications based on Client-Server technologies." Encapsulating OIM API’s in a Web Service for OIM Custom SOA Composites | Alex Lopez fusionsecurity.blogspot.com Alex Lopez describes "how to encapsulate OIM API calls in a Web Service for use in a custom SOA composite to be included as an approval process in a request template." Thought for the Day "Don't worry about people stealing your ideas. If your ideas are any good, you'll have to ram them down people's throats." — Howard H. Aiken

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• Updated SOA Documents now available in ITSO Reference Library

  - by Bob Rhubart

  Nine documents within the IT Strategies from Oracle (ITSO) reference library have recently been updated. (Access to the ITSO collection is free to registered Oracle.com members -- and that membership is free.) All nine documents fall within the Service Oriented Architecture section of the ITSO collection, and cover the following topics: SOA Practitioner Guides Creating an SOA Roadmap (PDF, 54 pages, published: February 2012) The secret to successful SOA is to build a roadmap that can be successfully executed. SOA offers an opportunity to adopt an iterative technique to deliver solutions incrementally. This document offers a structured, iterative methodology to help you stay focused on business results, mitigate technology and organizational risk, and deliver successful SOA projects. A Framework for SOA Governance (PDF, 58 pages, published: February 2012) Successful SOA requires a strong governance strategy that designs-in measurement, management, and enforcement procedures. Enterprise SOA adoption introduces new assets, processes, technologies, standards, roles, etc. which require application of appropriate governance policies and procedures. This document offers a framework for defining and building a proper SOA governance model. Determining ROI of SOA through Reuse (PDF, 28 pages, published: February 2012) SOA offers the opportunity to save millions of dollars annually through reuse. Sharing common services intuitively reduces workload, increases developer productivity, and decreases maintenance costs. This document provides an approach for estimating the reuse value of the various software assets contained in a typical portfolio. Identifying and Discovering Services (PDF, 64 pages, published: March 2012) What services should we build? How can we promote the reuse of existing services? A sound approach to answer these questions is a primary measure for the success of a SOA initiative. This document describes a pragmatic approach for collecting the necessary information for identifying proper services and facilitating service reuse. Software Engineering in an SOA Environment (PDF, 66 pages, published: March 2012) Traditional software delivery methods are too narrowly focused and need to be adjusted to enable SOA. This document describes an engineering approach for delivering projects within an SOA environment. It identifies the unique software engineering challenges faced by enterprises adopting SOA and provides a framework to remove the hurdles and improve the efficiency of the SOA initiative. SOA Reference Architectures SOA Foundation (PDF, 70 pages, published: February 2012) This document describes they key tenets for SOA design, development, and execution environments. Topics include: service definition, service layering, service types, the service model, composite applications, invocation patterns, and standards. SOA Infrastructure (PDF, 86 pages, published: February 2012) Properly architected, SOA provides a robust and manageable infrastructure that enables faster solution delivery. This document describes the role of infrastructure and its capabilities. Topics include: logical architecture, deployment views, and Oracle product mapping. SOA White Papers and Data Sheets Oracle's Approach to SOA (white paper) (PDF, 14 pages, published: February 2012) Oracle has developed a pragmatic, holistic approach, based on years of experience with numerous companies to help customers successfully adopt SOA and realize measureable business benefits. This executive datasheet and whitepaper describe Oracle's proven approach to SOA. Oracle's Approach to SOA (data sheet) (PDF, 3 pages, published: March 2012) SOA adoption is complex and success is far from assured. This is why Oracle has developed a pragmatic, holistic approach, based on years of experience with numerous companies, to help customers successfully adopt SOA and realize measurable business benefits. This data sheet provides an executive overview of Oracle's proven approach to SOA.

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• Career opportunities for mid-20 .Net developer

  - by Valera Kolupaev

  Recently, I have moved to Toronto and started exploring career opportunities here. My first impressions about .net developer/architect career are really controversial. Here options that comes to my mind right now: Grow as a developer, lead and solution architect in large and well-known company, like Logitech or IBM. Doing .net development medium size (10-30) software shops Joining some start-up guys First one, seems very bureaucratic with kills all programming fun, that is such valuable to me. And there is not a lot of start ups, that are based on MS technology stack. Good mid-size company seems like a best fit to me, since I can have a lot of fun, doing new projects. Previously I have been working at large (5000+) outsourcing provider as a .Net developer. I was kind of a 'vanilla' time, because our team were always doing massive scale projects from scratch, on latest .Net stack. I would really appreciate if you share pros and cons of path, that you have chosen and what you value most in your current project. I'll start: Pros for Mid-size You are really close to business and application consumers, without all bureaucratic papers Cons It seems, that career oportunities of vertical growth is rather limited, once I have to switch to my own company or join development team of some big players.

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• Why is NDA so hard to understand?

  - by Dave Campbell

  Maybe this concept is simpler for me because of all the jobs I've been on over the years requiring security clearances. I've signed quite a few NDA forms. Some for big companies, some for small, but the meaning of "NDA" remains constant: Non-Disclosure Agreement. To me, that takes no further explanation, but apparently it's confusing to some people, and I don't understand how you can be confused. The papers I signed with the U.S. Army in 1970 read "10 years and $10,000" for a violation... can't imagine what it's up to now, but THAT is a strict NDA :) So those things I've been told, I cannot talk about, period. Even if the entire world knows about them, I cannot speak about them until the information goes off NDA. An example was a Silverlight release a while back. It might have been Silverlight 3, I don't remember. Everyone was anxiously awaiting the release so they could post their material. Of course the entire world knew it was coming out and imminently so. Some enterprising folks had even found the bits on a server before the official announcement. So then the situation became: everyone knew about it, some were even coding with it and blogging about it and yet we couldn't talk about it. Scott Guthrie's posting about it opened the flood gates and then it went off NDA, but up until that moment, we were locked. Sitting out on the edge you're uninstalling and re-installing all the time and you get frustrated when things that used to work don't, but hey... those bits were still warm when you got 'em, and that's the fun. But that fun comes at a price, and the price is the NDA. Awkward yes, confusing no... See you at MIX10, and Stay in the 'Light! MIX10

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• geomipmapping using displacement mapping (and glVertexAttribDivisor)

  - by Will

  I wake up with a clear vision, but sadly my laptop card doesn't do displacement mapping nor glVertexAttribDivisor so I can't test it out; I'm left sharing here: With geomipmapping, the grid at any factor is transposable - if you pass in an offset - say as a uniform - you can reuse the same vertex and index array again and again. If you also pass in the offset into the heightmap as a uniform, the vertex shader can do displacement mapping. If the displacement map is mipmapped, you get the advantages of trilinear filtering for distant maps. And, if the scenery is closer, rather than exposing that the you have a world made out of quads, you can use your transposable grid vertex array and indices to do vertex-shader interpolation (fancy splines) to do super-smooth infinite zoom? So I have some questions: does it work? In theory, in practice? does anyone do it? Does this technique have a name? Papers, demos, anything I can look at? does glVertexAttribDivisor mean that you can have a single glMultiDrawElementsEXT or similar approach to draw all your terrain tiles in one call rather than setting up the uniforms and emitting each tile? Would this offer any noticeable gains? does a heightmap that is GL_LUMINANCE take just one byte per pixel(=vertex)? (On mainstream cards, obviously. Does storage vary in practice?) Does going to the effort of reusing the same vertices and indices mean that you can basically fill the GPU RAM with heightmap and not a lot else, giving you either bigger landscapes or more detailed landscapes/meshes for the same bang? is mipmapping the displacement map going to work? On future cards? Is it going to introduce unsurmountable inaccuracies if it is enabled?

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• VirtualBox Clone Root HD / Ubuntu / Network issue

  - by john.graves(at)oracle.com

  When you clone a root Ubuntu disk in VirtualBox, one thing that gets messed up is the network card definition.  This is because Ubuntu (as it should) uses UDEV IDs for the network device.  When you boot your new disk, the network device ID has changed, so it creates a new eth1 device.  Unfortunately, this conflicts with the VirtualBox network setup.  What to do? Boot the box (no network) Edit the /etc/udev/rules.d/70-persistent-net.rules Delete the eth0 line and modify the eth1 line to be eth0 --------- Example OLD ----------- # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key. # PCI device 0x8086:0x100e (e1000) <-------------------- Delete these two lines SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:d8:8d:15", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" # PCI device 0x8086:0x100e (e1000) ---Modify the next line and change eth1 to be eth0 SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:89:84:98", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth1" .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } ---------------------------------------- --------- Example NEW ----------- # This file was automatically generated by the /lib/udev/write_net_rules # program, run by the persistent-net-generator.rules rules file. # # You can modify it, as long as you keep each rule on a single # line, and change only the value of the NAME= key. # PCI device 0x8086:0x100e (e1000) SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="08:00:27:89:84:98", ATTR{dev_id}=="0x0", ATTR{type}=="1", KERNEL=="eth*", NAME="eth0" .csharpcode, .csharpcode pre { font-size: small; color: black; font-family: consolas, "Courier New", courier, monospace; background-color: #ffffff; /*white-space: pre;*/ } .csharpcode pre { margin: 0em; } .csharpcode .rem { color: #008000; } .csharpcode .kwrd { color: #0000ff; } .csharpcode .str { color: #006080; } .csharpcode .op { color: #0000c0; } .csharpcode .preproc { color: #cc6633; } .csharpcode .asp { background-color: #ffff00; } .csharpcode .html { color: #800000; } .csharpcode .attr { color: #ff0000; } .csharpcode .alt { background-color: #f4f4f4; width: 100%; margin: 0em; } .csharpcode .lnum { color: #606060; } ----------------------------------------

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• Considering Embedding a Database? Choose MySQL!

  - by Bertrand Matthelié

  The M of the LAMP stack and the #1 database for Web-based applications, MySQL is also an extremely popular choice as embedded database. 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:0cm 5.4pt 0cm 5.4pt; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; 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-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Access our Resource Kit to discover the top reasons why:   3,000 ISVs and OEMs rely on MySQL as their embedded database 8 of the top 10 software vendors and hundreds of startups selected MySQL to power their cloud, on-premise and appliance-based offerings Leading mobile and SaaS providers ensure continuous service availability and scalability with lower cost and risk using MySQL Cluster. Learn how you can reduce costs and accelerate time to market while increasing performance and reliability. Access white papers, webinars, case studies and other resources in our Resource Kit.  

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