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• How do I left-click a Java Application on a WeTab running Ubuntu 12.10? (workaround defect in Onboard)

  - by Kat Amsterdam

  I installed Ubuntu 12.10 on my weTab. Everything works perfectly (albeit slowly) and I can touch and use every application execpt ones written in Java. When I start any Java Application the touchscreen does not recognize the left click. I believe it's a problem in OnBoard (the onscreen keyboard) because when I touch the mouse icon on the OnBoard and then the Java Application the left click works. This is very cumbersome for every click to first hit OnBoard mouse icon and then button in the Java app I would like to click. It defeats the purpose of a touchscreen. The Java Application is definitly touchable as it's running on 10 other machines with Elo Touchscreen. How do I get Ubuntu to recognize the left click in a java application automatically when I touch the screen? Or a way to dignose this so I can make a clear bug report? This happens in all the desktop environments (Gnome/Unity, XFCE4 and LXDE) I tried with openjdk-6-* and openjdk-7-* Stats: WeTab 32GB 3G 2GB RAM Intel(R) Atom(TM) CPU N450 @ 1.66GHz - 64-bit Ubuntu 12.10 - 64 bit Unity Desktop environment Xubuntu Desktop environment Lubuntu Desktop environment The real touchscreen driver from EETI (eGalaxy) (also didn't work with the Ubuntu standard touchscreen driver)

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• What is the best way to exploit multicores when making multithread games?

  - by Keeper

  Many people suggest to write a program, and then start optimizing it. But I think that when it's coming to multithreading with multicore, a little think ahead is required. I've read about using threads, and experienced it myself during some courses at the university (still a student). The big question is simple, but a bit abstract: What thread related steps in game design do I need to take, before implementation? Now trying to be more specific. Let's say, as an example, that I'm making a small board game (like Monopoly) that I want to be multithreaded. My goal Is that this multithreaded game will exploit the best of the multicore system, lets say 4-6 cores (like in i7 processors). My answer to this question at the moment is, one thread for each of these four basic components: GUI User Input / Output AI (computer rival) Other game related calculations (like shortest path from A to B, or level up status change) I'm not an expert (yet!), and I'm sure there are better answers out there. Any suggestion, answer, different approach will be helpful. Some thoughts: Maybe splitting the main database is a good way.. (or total disaster.. )

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• Web Crawler for Learnign Topics on Wikipedia

  - by Chris Okyen

  When I want to learn a vast topic on wikipedia, I don't know where to start. For instance say I want to learn about Binary Stars, I then have to know other things linked on that pages and linked pages on all the linked pages and so on for the specified number of levels. I want to write a web crawler like HTTracker or something similiar, that will display a heiarchy of the links on a certain page and the links on those linked pages.I wish to use as much prewritten code as possible. Here is an example: Pretending we are bending the rules by grabing links from only the first sentence of each pages The example archives and "processes" two levels deep The page is Ternary operation The First Level In mathematics a ternary operation is an N-ary operation The Second Level Under Mathmatics: Mathematics (from Greek µ???µa máthema, “knowledge, study, learning”) is the abstract study of topics encompassing quantity, structure, space, change and others; it has no generally accepted definition. Under N-ary In logic,mathematics, and computer science, the arity i/'ær?ti/ of a function or operation is the number of arguments or operands that the function takes Under Operation In its simplest meaning in mathematics and logic, an operation is an action or procedure which produces a new value from one or more input values ------------------------------------------------------------------------- I need some way to determine what oder to approach all these wiki pages to learn the concept ( in this case ternary operations )... Following along with this exmpakle, one way to show the path to read would a printout flowout like so: This shows that the first sentence of the Mathematics page doesn't link to the first sentence of pages linked on ternary page two levels deep. (Please tell me how I should explain this ) --- In otherwords, the child node of the top pages first sentence, ternary_operation, does not have any child nodes that reference the children of the top pages other children nodes- N-ary and operation. Thus it is safe to read this first. Since N-ary has a link to operations we shoudl read the operation page second and finally read the N-ary page last. Again, I wish to use as much prewritten code as possible, and was wondering what language to use and what would be the simpliest way to go about doing this if there isn't already somethign out there? Thank You!

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• The advantages & disadvantages to be had from using a Web Framework?

  - by JHarley1

  Hello, This question is focused on extracting the advantages and disadvantages of using Web based Frameworks: such as Cake PHP, Zend, jQuery, ASP.NET). This question is completely language agnostic. Let me start with the notion of "Standing on the shoulders of Giants". Advantages: Empowers Developers - by taking features that would have previously have taken 100's of lines of code and compressing them into one simple function call empowers developers to integrate more complex features into their Web Sites. Allow for Quicker development of applications - this is very relevant for people that need websites created in a very small window (has anyone any examples of this?) Lower Costs - allows programmers to pass cost savings onto the customer, a whole new range of customers generated that wanted a website but previously could not afford the higher development costs. Disadvantages: Lost Understanding - by relying on the features of a framework a developer is in danger of loosing understanding on how things work (underneath the hood). The configuration cliff - once you go further than the configuration of your framework your productivity drops right off, it can be difficult to implement features outside of a frameworks configuration. Developer tramlines - you (the developer) has to do things the way that the developer want you to do things. Security issues - giving people these tools to develop professional looking websites fast is a potential risk, people can quickly create professional looking websites for fraudulent companies. I wonder what people make of my points, and whether any body disagrees with them? Also if people have additional points I would be grateful. Many Thanks, J

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• Reformatting and version control

  - by l0b0

  Code formatting matters. Even indentation matters. And consistency is more important than minor improvements. But projects usually don't have a clear, complete, verifiable and enforced style guide from day 1, and major improvements may arrive any day. Maybe you find that SELECT id, name, address FROM persons JOIN addresses ON persons.id = addresses.person_id; could be better written as / is better written than SELECT persons.id, persons.name, addresses.address FROM persons JOIN addresses ON persons.id = addresses.person_id; while working on adding more columns to the query. Maybe this is the most complex of all four queries in your code, or a trivial query among thousands. No matter how difficult the transition, you decide it's worth it. But how do you track code changes across major formatting changes? You could just give up and say "this is the point where we start again", or you could reformat all queries in the entire repository history. If you're using a distributed version control system like Git you can revert to the first commit ever, and reformat your way from there to the current state. But it's a lot of work, and everyone else would have to pause work (or be prepared for the mother of all merges) while it's going on. Is there a better way to change history which gives the best of all results: Same style in all commits Minimal merge work ? To clarify, this is not about best practices when starting the project, but rather what should be done when a large refactoring has been deemed a Good Thing™ but you still want a traceable history? Never rewriting history is great if it's the only way to ensure that your versions always work the same, but what about the developer benefits of a clean rewrite? Especially if you have ways (tests, syntax definitions or an identical binary after compilation) to ensure that the rewritten version works exactly the same way as the original?

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• JavaOne Countdown, Are you ready?

  - by Angela Caicedo

  This is a great time of the year!  Not only does the weather start cooling down a bit, but it's time to get ready for JavaOne 2012.  It feels so long since my last JavaOne (last year I missed it because I was on a mom duty), so this year I couldn't be happier to be this close to the action again.  Have you ever been at JavaOne?  There are a million great reasons to love JavaOne, and the most important for me is the atmosphere of the conference: The Java community is there, and Java is in the air! This year we have more than 450 sessions, and there are HOLs (Hands on labs) to get your hands dirty with code.  In addition, there will be very cool demos, an exhibition hall. and a DEMOground.  During the whole time, you will have the opportunity to interact with the speakers, discuss topics and concerns, and even have a drink! Oh yes, I almost forgot, there will be lots of fun even apart from the technology!  For example there will be a Geek Bike Ride, a Thirsty Bear party, and the Appreciation Party with Pearl Jam and Kings of Leon.  How can this get any better! So, are you ready yet?  Have you registered?  If not, just follow this "Register for JavaOne" link and we'll see you there! P.S.  Little known fact: If you are a student you can get your pass for free!!!

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• Are Windows partitions gone?

  - by Gigili

  I had Windows 7 on my laptop (factory setting), because of some performance issues, I decided to use recovery options to restore it to its factory condition but I don't know what has happened or what I have done that the whole operating system was gone after playing around with recovery options from the boot menu. I couldn't find Windows, so I installed Ubuntu 11.04 on my laptop. Last time I had Ubuntu on it, it was not really compatible with laptop's configuration and I had a bit of problems trying to do normal tasks I used to do on Windows. Now I want to make sure that Windows and its drivers are gone so that I can try to install a newer version of Ubuntu or Windows. I tried the command sudo fdisk -l And the result shown was: myaccount@myaccount-VPCS116FG:~$ sudo fdisk -l [sudo] password for myaccount: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00025b5f Device Boot Start End Blocks Id System /dev/sda1 * 1 38409 308515840 83 Linux /dev/sda2 38409 38914 4052993 5 Extended /dev/sda5 38409 38914 4052992 82 Linux swap / Solaris Disk /dev/dm-0: 4150 MB, 4150263808 bytes 255 heads, 63 sectors/track, 504 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xa668cfe8 Disk /dev/dm-0 doesn't contain a valid partition table Is it gone? If not, what command should I try to have access to Windows partitions? Thank you.

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• Running a Screen instance of a program as non-root

  - by user288467

  I've got a dedicated server (Ubuntu 12.04, no GUI) set up to launch an instance of McMyAdmin and attach it to a screen instance every time I reboot the hardware. I have the command saved to root's crontab as: @reboot cd /var/MC_SVR && screen -dmS McMyAdmin ./MCMA2_Linux_x86_64 Problem being, though, I have a user set up specifically for FTP access to the server files so I don't always have to SSH into the machine. Since the server is being started as a root process, all the files it makes are, obviously, set with root as the owner. So I chown'd all the files and set them to ftpuser. Now I'm stuck with trying to get the process to start as ftpuser. I've tried doing the following but to no avail: cd /var/MC_SVR && su ftpuser - -c 'screen -dmS McMyAdmin ./MCMA2_Linux_x86_64' I try this in terminal and I get no errors or anything (in fact I never get anything unless it's a syntax error from su), but there's no screen instance to access and so I can assume the server never starts. So, what am I doing wrong? Or am I just not accessing the screen instance correctly since it's (supposed) to be launched by another user?

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• Weird bug in Visual Studio 11 Beta when running on Windows 8

  - by raccoon_tim

  With the Windows 8 Consumer Preview version out in the open and the Visual Studio 11 Beta also available, I’ve been putting some more effort into trying them both out. The first impression of the new Visual Studio 11 build was: Why doesn’t it work at all on Windows 8?! The issues I encountered were odd to say the least. Visual Studio did install correctly, which was a good sign, but when I started it, I was greeted with a multitude of popups each telling me that some package could not be loaded. So I clicked away for quite some time to finally be greeted by the new default visual style of Visual Studio. The next thing I wanted to do was start a new project so I pressed “New Project” and got the “Microsoft.VisualStudio.Dialogs.DialogInitializationException” exception. After some pondering and even submitting a bug report I found another already reported bug “http://connect.microsoft.com/VisualStudio/feedback/details/727578/vs-do-not-work-with-finnish-number-format-on-w8-64-bit”. It turns out that the dialog initialization failure has something to do with the packages no being loaded and following the presented workaround helped. The trick is to change the negative number sign to “-“ (U+002D) from the additional settings of your regional settings. This issue appears to have a wider reach than just Visual Studio as I heard at TechDays Finland 2012 that the same fix has to be made when using Hyper-V.

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• In virtualbox, I can't access the dvd drive to install a guest host

  - by user211062

  I have installed a fresh copy of Ubuntu Server 12.04 and VirtualBox 4.3. I have set up a VM called "MediaServer" and tried to start it. I then get the following error: Cannot open host device '/dev/sr0' for readonly access. Check the permissions of that device ('/bin/ls -l /dev/sr0'): Most probably you need to be member of the device group. Make sure that you logout/login after changing the group settings of the current user (VERR_ACCESS_DENIED) I have looked all over the Internet and have been unable to find a solution. Using Webmin, I tried changing the group settings so that my user name was in the "vboxusers" group, but that did not work either. I tried various other changes in group settings and none of them worked. Also, I tried rebooting the server after the changes and that didn't work either. I have been following a guide on how to set up an Ubuntu server from the website "linuxhomeserverguide.com" and when it came to the section where you could finally set up your first virtual machine, I am stumped. I would really appreciate it if someone could help me. Thanks in advance.

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• How can I find out what site a popup ad came from?

  - by ændrük

  This is the situation: I've been browsing the web for an hour in pursuit of some bit of technical information and have visited several dozen websites that I don't even remember anymore. I've finally found what I need so I start closing the web browser, only to discover that — aaargh! — there's a popup ad hiding underneath! My blood boils. What insidious website is responsible for this circumvention of my browser's popup blocker? I want to make it pay for its crime. I'll write angry emails. Leave bad reviews. Even block it from my Google search results — yes, that'll show it! But I've reached an impediment. The offending site has already been closed. Is it too late to deduce the advertisement's origin? Or can I somehow un-pop the popup? Here's a test page. With only the popup left on your screen, can you deduce that it was caused by visiting PasteHTML?

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• accessing files on a shared folder via IIS

  - by Darkcat Studios

  Im not sure if this suits stackexchange, serverfault or here... so i'll go with here for a start. I'm having issues setting up a network share to be accessed by IIS, all I need to do is read/write files on the Other server. We have 2 servers set up (Both 2008 R2 & IIS 7.5), one is the WEB server, which is externally accessible and NOT part of the domain. We also have an Intranet server which has no internet connectivity and is part of the domain. These 2 servers can talk to each other happily, I have the SQL server on the WEB server shared across to the intranet server so that the web content is editable from the intranet. I can share a folder on the web server (say, wwwroot/Images/) and connect to it from the intranet server, even have it as a mapped drive (but i know thats not going to work for IIS to access it), So there seems not to be a connectivity issue. I can also set up a Virtual folder in IIS on the Intranet server - this is where it gets annoying - I cant connect using pass-through authentication because there is no suitable user on the web server (which is not on the domain). If i set up a user on the web server, eg Intranet_USR, and give it appropriate rights to the folder, files and share, i can connect, but only view folder contents in IIS, not read, although that user has read privileges!! Any help much appreciated!

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• Black login screen Ubuntu 12.04 if WGA cable pluged in on reboot

  - by Sulliwane

  I'm using Ubuntu 12.04.1, 64 bits, installed on a Z77 Pro4 (ASrock motherboard), crucial M4 SSD drive (sata 3), and intel i5 3570k (ivy bridge). I have this annoying problem : When I startup the computer, I get a CLI login prompt : At this moment, if I press enter, i get the usual CLI login prompt. If not, here is what I get : From now, if I login using CLI, i identify the lightdm processus, kill and start it : #ps -A | grep lightdm #sudo kill -9 1273 #sudo lightdm and miracle, these commands bring back the gui login screen. BUT It's very annoying as I have to repeat these steps at every boot, and the people using this desktop are not familiar with linux at all! So I tried to figure out the cause and here is what I found : If, when I shutdown the computer, the WGA cable is not pluged in, then Ubuntu will boot on GUI login screen without a glitch! But If the WGA cable is pluged in when shuting down, I will get CLI login prompt... Note 1: I installed linux kernel 3.4, but it hasn't solve the problem. Note 2: Is it linked to the new HD 4000 integrated graphic processor ? Note 3: If i boot on an USB stick (Ubuntu 12.04), NO problems ! Note 4: If booting on the SSD, when clicking "shutdown" button, the shutdown process never ends up (logout screen keep displaying and fans are still rolling). But if booting on USB stick, the shutdown action runs properly.

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• Kindle App for WP7 arrives

  - by dotgeek

  If you had asked me if I was interested in owning a Kindle device, then my response a couple months back would have been a flat out no back then. So what has changed between now on then you might be asking me then? I would have to say watching my wife enjoy the many books in digital form has peeked my interest to start with now. Was that enough for me to buy a Kindle though? Not just yet, but that is where the Windows Phone 7 comes in for me once again. It’s no secret that I’ve wanted this device and yes it does have a number of Apps that I think I’ll really enjoy. The latest must have App for me, will most certainly be the Kindle App for Windows Phone 7, released from Amazon today. I’ve already started playing around with the PC version of Kindle software and I’m looking at purchasing any future books in digital form now. So it’s a given once I have a Windows Phone 7 device, that I’ll be enjoying some of my favorite books, while I’m on the go I think and via this App. Tonight I actually had a chance to check out the WP7 Kindle App on a friends device and I was really pleased with how it looked and performed. Now if the planets could only manage to lineup for me and allow Verizon and Microsoft to come to terms on the releasing of WP7 CDMA devices, I just might be able to really enjoy some of this on my own. Do I rule out ever having an actual Kindle device? Not at all, but I do plan on having the WP7 device well before that day ever comes though.

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• Points around a circumference C#

  - by Lautaro

  Im trying to get a list of vectors that go around a circle, but i keep getting the circle to go around several times. I want one circel and the dots to be placed along its circumference. I want the first dot to start at 0 and the last dot to end just before 360. Also i need to be able to calculate the spacing by the ammount of points. List<Vector2> pointsInPath = new List<Vector2>(); private int ammountOfPoints = 5; private int blobbSize = 200; private Vector2 topLeft = new Vector2(100, 100); private Vector2 blobbCenter; private int endAngle = 50; private int angleIncrementation; public Blobb() { blobbCenter = new Vector2(blobbSize / 2, blobbSize / 2) + topLeft; angleIncrementation = endAngle / ammountOfPoints; for (int i = 0; i < ammountOfPoints; i++) { pointsInPath.Add(getPointByAngle(i * angleIncrementation, 100, blobbCenter)); // pointsInPath.Add(getPointByAngle(i * angleIncrementation, blobbSize / 2, blobbCenter)); } } private Vector2 getPointByAngle(float angle, float distance, Vector2 centre) { return new Vector2((float)(distance * Math.Cos(angle) ), (float)(distance * Math.Sin(angle))) + centre ; }

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• Beginners guide to developing optimization software

  - by Florenc

  I am novice in "serious" programming i.e. applications that deal with real-life applications and software projects that go beyond school assignments. My interests include optimization, operations research, algorithms and lately i discovered how much I do like software design/development/engineering. I have already developed some simple desktop applications for some "famous" problems like TSP using heuristc approaches, a VRP solver (in progress) and so on. While developing this kind of software I actually used basic concepts taught at school such as object-orientation analysis and design. But, I found these courses rather elementary and quite boring (for my expectations). So I decided to go a little further and start developing "real" software (and this is where I realized how important and interesting software engineering/design is.) Now, here's my issue: I can not find a "study guide" for developing software of this kind. Currently, there are numerous resources out there (books, websites, tutorials) in designing and developing complex IS, web applications, smartphone apps but I can't find a book for example entitled "optimization software development". Definetly, someone could claim that "design patterns apply to software in general" but that's not my point. My point is that I could simply use my imagination for "simple" implementations, but what happens, when my imagination can not go further? In other words I'm looking for a guide/path to bridge the gap between: Mathematics-Algorithm Design-Software Engineering-Optimization-Software development

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• What should I recommend a small company looking for C# developers

  - by Coder

  Here is the issue. I am a senior developer, and one of the start-ups I designed the system (management system/database/web) a long time ago, have grown and need software updates. I have left their system to another developer long time ago, but apparently he has left the job, and so they are asking me if I can suggest them where to find a new one. The problem is that the company has no clue that the IT is not cheap. They expect multiple features to be added for 40$, so that's an issue. Actually one of the reasons why I left the project when I did. Lots of expectations, little pay, also I know those people outside work, so I decided to avoided stressing the nonwork-relationships and left the project gracefully. Today they asked me for an advice, and I told them that the feature list they want is probably going to cost some if they'll get a senior developer for the job. So I guess their best bet is to find someone who loves coding and has just finished the school. Which would give someone a chance to code for money which is good for a student, and at the same time, allow the student to get some hands on experience. Then again, the system is not exactly 20 line console program, there is an MSSQL database, ASP.NET web page and content management system with all the AJAX stuff and some other things. So student straight out of school could have some problems with that. But, I thought about the issue some more, and I think that junior developer is a tricky deal, without mentoring, he can either screw up royally, or just do what's asked. Also, it seems no one is coming to interviews at all, which is weird, or maybe not. What should I suggest them?

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• Keep cube spinning after fling

  - by Zero

  So I've been trying to get started with game development for Android using Unity3D. For my first project I've made a simple cube that you can spin using touch. For that I have the following code: using UnityEngine; using System.Collections; public class TouchScript : MonoBehaviour { float speed = 0.4f; bool canRotate = false; Transform cachedTransform; public bool CanRotate { get { return canRotate; } private set { canRotate = value; } } void Start () { // Make reference to transform cachedTransform = transform; } // Update is called once per frame void Update () { if (Input.touchCount > 0) { Touch touch = Input.GetTouch (0); // Switch through touch events switch (Input.GetTouch (0).phase) { case TouchPhase.Began: if (VerifyTouch (touch)) CanRotate = true; break; case TouchPhase.Moved: if (CanRotate) RotateObject (touch); break; case TouchPhase.Ended: CanRotate = false; break; } } } bool VerifyTouch (Touch touch) { Ray ray = Camera.main.ScreenPointToRay (touch.position); RaycastHit hit; // Check if there is a collider attached already, otherwise add one on the fly if (collider == null) gameObject.AddComponent (typeof(BoxCollider)); if (Physics.Raycast (ray, out hit)) { if (hit.collider.gameObject == this.gameObject) return true; } return false; } void RotateObject (Touch touch) { cachedTransform.Rotate (new Vector3 (touch.deltaPosition.y, -touch.deltaPosition.x, 0) * speed, Space.World); } } The above code works fine. However, I'm wondering how I can keep the cube spinning after the user lifts his finger. The user should be able to "fling" the cube, which would keep spinning and after a while would slowly come to a stop due to drag. Should I do this using AddForce or something? I'm really new to this stuff so I'd like it if you guys could point me in the right direction here :) .

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• Plugged in, not charging&ndash;Windows 7

  - by Kelly Jones

  Just a quick post on something I ran into lately with my Dell Precision M4500 laptop (monster laptop!).  I noticed the little icon in the system tray for the power options was stating that it was “plugged in, not charging”.  I don’t know why it was stating this, but I quickly found a fix for it on the net. I found the fix in this forum on CNET.  Here’s the fix: In order to correct problems with the battery's power management software, follow the steps below. 1. Click Start and type device in the search field, then select Device Manager . 2. Expand the Batteries category. 3. Under the Batteries category, right-click the Microsoft ACPI Compliant Control Method Battery listing, and select Uninstall . WARNING: Do not remove the Microsoft AC Adapter driver or any other ACPI compliant driver. 4. On the Device Manager taskbar, click Scan for hardware changes . Alternately, select Action > Scan for hardware changes . Windows will scan your computer for hardware that doesn't have drivers installed, and will install the drivers needed to manage your battery's power. The notebook should now indicate that the battery is charging.   And it did work.

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• Why is the US international keyboard layout on Ubuntu different?

  - by pablo

  I have been using Linux on and off for 10 years, and more recently I have spent more time with OSX. But, I still remember that in the beginning I'd choose the US international keyboard layout and it would have exactly the same output as the Windows keyboard layout (and most recently, the OSX US international layout). However, a few years ago when I installed Ubuntu, I noticed that the cedilla wasn't printed anymore (ç or Ç). This is a combination of the following keys: ' + c. Instead, what I get is the c letter. When did it start to happen, and why the difference to the behavior on the other OSes? What puzzles me even more is that there is even an "US International alternative" keyboard layout, which prints exactly the same keys! So, what's it alternative to? This has been reported as a bug back to Canonical (can't find the link now), but the keyboard layout has never changed back to what I'd expect. I know the workarounds to fix it to what I need, but I just would like to know why/when it has become different.

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• What's Up for "We're Almost There" Wednesday

  - by Oracle OpenWorld Blog Team

   By Karen Shamban Wow - can't believe we're looking at Wednesday already!  Still so much to do, places to go, people to talk with. The last day for the Exhibition Halls is Wednesday, so be sure to spend time there if you haven't done so already. And don't forget (as if you would) that the famed Oracle Appreciation Event is Wednesday night on Treasure Island.  Here are just some of the big things happening Wednesday, October 3: Registration Moscone West, Moscone South, Hilton San Francisco, Westin St. Francis, Hotel Nikko, 7:00 a.m. - 6:30 p.m. Oracle OpenWorld Keynote featuring Oracle executives John Fowler, Edward Screven, and Juan Loiaza Moscone North Hall D, 8:00 a.m. - 9:45 a.m. Exhibition Halls Open Moscone South and Moscone West, 9:45 a.m. - 4:00 p.m. General Sessions Various times and locations Sessions, Demos, Labs Various times and locations Oracle Appreciation Event, featuring Pearl Jam, with Kings of Leon and X Treasure Island, 7:30 p.m. - 1:00 a.m. (note: must have approved wristband to attend) After what is sure to be a late night, it's good to know that the Thursday keynotes don't start until 9:00 a.m. They're going to be really great, so you won't want to miss them!

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• What would be a good topic for research on "edge of multiple processors / computers programming" topic?

  - by Kabumbus

  This is a subjective discussion so we can express our dreams and hopes here. A "topic" must be like a task with point to have as end result a software poduct. A "topic" must be mainly about "Software engineering", "Algorithm and data structure concepts" and perhaps "Design patterns". I mean let us try to look what is not already there? What can be developed in fiew month and give a breakthrue / start a new leap / show somethig not realized before in science of f multiple computers programming? What i see is already there: LAN / wire and other infrastractural programms for connecting on device level MPI/ Bit torrent/Jabber protocols / APIs / servers for messaging on top Boost and analogs on evry OS in most languages for multithreading there are lots of CUDA like on computer frameworks for fast calculating on computers GPUs What I personally do not see out there is a crossplatform framework for multiple processes interaction. Meaning one that would allow easy creation of multyple processes running in paralell inside one hoster app on one machine. In level not harder than needed for threads creation (so no seprate server apps - just one lib doing it all) Is there ny such lib and what can you propose for research topic?

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• Tracking down memory issues affecting a website

  - by gaoshan88

  I've got a website (Wordpress based) that became unresponsive. I SSH'd into the server and saw that we were out of memory. Errors in my apache log files indicated the same... things failing to be allocated due to lack of memory). Restarting the server fixes it. So I look in access.log and error.log around the time of the incident but I see nothing strange. No extra traffic, no unusual requests. In fact the only request around the time of the problem was one from Googlebot for an rss feed... at that point I start to see 500 response codes in the logs until the machine was rebooted. I look in message.log hoping to see something but there is nothing at all for that entire day (which is odd as there are entries for every other day). The site has a large amount of memory allocated to it and normally runs using about 30% of what is available. My question... how would you go about trying to track this down at this point? What are some other log files I could check or strategies I could take?

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• XNA - 2D Rotation of an object to a selected direction

  - by lobsterhat

  I'm trying to figure out the best way of rotating an object towards the directional input of the user. I'm attempting to mimic making turns on ice skates. For instance, if the player is moving right and the input is down and left, the player should start rotating to the right a set amount each tick. I'll calculate a new vector based on current velocity and rotation and apply that to the current velocity. That should give me nice arcing turns, correct? At the moment I've got eight if/else statements for each key combination which in turn check the current rotation: // Rotate to 225 if (keyboardState.IsKeyDown(Keys.Up) && keyboardState.IsKeyDown(Keys.Left)) { // Rotate right if (rotation >= 45 || rotation < 225) { rotation += ROTATION_PER_TICK; } // Rotate left else if (rotation < 45 || rotation > 225) { rotation -= ROTATION_PER_TICK; } } This seems like a sloppy way to do this and eventually, I'll need to do this check about 10 times a tick. Any help toward a more efficient solution is appreciated.

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• Getting started on Large Projects

  - by Mercfh

  So I just graduated from my College with a B.S. in Comp. Science (although it was a good school, we're the only accredited CS department in our state.....for w/e that means lol) I feel like im a decent programmer, not amazing....but not terrible. Anyways I got my first job about 2 weeks ago, it's a pretty entry level job: firmware development/tester (I know I know people look down on testers...but I gotta start somewhere). Anyways there isn't a whole lot of coding to be had right now (mostly simple stuff) but here soon I have the option of helping out with development (which is what I want to do) Thing is....I have NEVER worked on a huge project. I mean in school sure we had "group" projects but nothing really big. So I'm not super familiar with HUGE classes and such (main language was C++)....Is this something I'll just get used to with time? Some fellow students were used to that with internships and such...but I never got that chance. My job was mostly a "one man job" kinda thing. Mostly little things. Plus in class we never did huge projects anyways. So how do you guys I guess "plan" out these things? Do you use a whiteboard and plan out classes and such....or what. Also...another worry of mine is that I have to use google......ALOT for examples of code, because sometimes I just don't get how something works. Is this normal? It makes me feel sorta.....stupid I guess. I mean "technically" i've had 4-5 years coding experience......but it really only feels like I had 2 years of REAL experience. If that makes any sense? Thanks

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