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• Every Linking Strategy Starts with Great Content

  Having great content is at the core of every effective linking strategy. In order to develop back links you absolutely must give other sites a reason to link to you in the first place. Having some ty... [Author: TJ Philpott - Web Design and Development - May 20, 2010]

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• Determining whether two fast moving objects should be submitted for a collision check

  - by dreta

  I have a basic 2D physics engine running. It's pretty much a particle engine, just uses basic shapes like AABBs and circles, so no rotation is possible. I have CCD implemented that can give accurate TOI for two fast moving objects and everything is working smoothly. My issue now is that i can't figure out how to determine whether two fast moving objects should even be checked against each other in the first place. I'm using a quad tree for spacial partitioning and for each fast moving object, i check it against objects in each cell that it passes. This works fine for determining collision with static geometry, but it means that any other fast moving object that could collide with it, but isn't in any of the cells that are checked, is never considered. The only solution to this i can think of is to either have the cells large enough and cross fingers that this is enough, or to implement some sort of a brute force algorithm. Is there a proper way of dealing with this, maybe somebody solved this issue in an efficient manner. Or maybe there's a better way of partitioning space that accounts for this?

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• Does Google Tv (NSZ-GS7) work with HTPC?

  - by Mark Trinh

  I was wondering if my Google Tv will seamlessly work with my HTPC. I'm running Windows Media Center using a InfiniTv quad tuner with a cable card. I'm able to connect my GTV with my HTPC and be able to see the GTV interface overlaid on top of media center. Unfortunately, I'm not really able to use the Tv/Movies App to look at live shows and change the channel. I have the Video device setup as Media Center PC, but then the Live Tv App doesn't work. If I change to my tv service provider (Verizon FIOS), the Live Tv App works, but then it won't be able to change the channel.

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• Ubuntu 12.04 "stuttering"

  - by Totte

  When I log in to the desktop Ubuntu seems to "stutter". Doing pretty much anything causes the cursor to freeze for a few seconds, and the rest of the screen updates something like every 15 seconds (during these 15 seconds I can still move the cursor). For example, opening the home folder I first see no effect, followed by a semi-transparent home folder, and finally the folder as it should be (this can take like 30 seconds); no animation, just three individual frames. Also, I sometimes don't see a window for a program, even though the program in question is supposed to be "up". Since this is my first experience of Linux, I confess I have no idea where to start - searching the web I only found problems with complete freezes/crashes requiring rebooting, as opposed to this "stuttering". I installed Ubuntu 12.04 32bit from a bootable USB stick a couple of days ago, right after a fresh Vista 32bit install. Thinking the stuttering might stop if I updated Ubuntu, I managed to install approx 270 updates through the Update Manager, but the stuttering was still there. Apart from the updates, I haven't installed any software other than what was included on the bootable USB stick. Vista and Ubuntu are on a single Crucial m4 SSD, in a dual-boot setup, with GRUB. CPU: Intel Core 2 Quad Q6600 GPU: Nvidia GeForce 8800 GTX (with the recommended proprietary drivers) RAM: 2GB DDR2

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• MSI Wind12 U230: Netbook or Notebook?

  The MSI Wind12 U230 netbook -- or is it a notebook? -- has a spacious 12.1-inch screen, a dual-core AMD processor and 2GB of RAM.

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• JavaOne 2011 - Moscow and Hyderabad Editions

  - by Cassandra Clark

  Connect with Java developers at JavaOne - JavaOne will be held in Moscow, April 12-13th, 2011 and again in Hyderabad, May 10th - 11th, 2011. Enjoy two days of technical content and hands-on learning focused on Java and next-generation development trends and technologies, including rich enterprise applications (REAs), service-oriented architecture (SOA), and the database.JavaOne Moscow Tracks - Java EE, Enterprise Computing, and the CloudJava SE, Client Side Technologies, and Rich User ExperiencesJava ME, Mobile, and EmbeddedJavaOne Hyderabad Tracks - Core Java PlatformJava EE, Enterprise Computing, and the CloudJava SE, Client Side Technologies, and Rich User ExperiencesJava ME, Mobile, and EmbeddedRegister Now for JavaOne Moscow!Register Now for JavaOne Hyderabad!

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• Offer me an ASP.NET & a SQL Server 2008 server specifications for about 2000 concurrent users, please.

  - by amkh

  We have a web application project wich will be created using ASP.NET 4.0, Entity Framework, and SQL Sever 2008 R2. To meet the needs, suppose a normal page of this application that has a query which it takes 10 miliseconds to response on a Core2 Quad @ 2.8GHz proccessor with 2x2GB of DDR3 Ram (EntityFramework overheads are considered). And we will have about 2000 concurrent user at peek times. So, what is the best recommended specifications (CPU/RAM/RAID/...) for the server which will be host this application? -- Or -- How can I calculate that?

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• VMWare workstation: guest OS becomes sluggish after being idle for 12+ hours?

  - by GenEric35

  Hi, My VM becomes sluggish after a few hours(~12 hours or so) of being idle, there is no impact on the host, just the gueste. The guest OS becomes sluggish. It has lots of RAM, runs on Raid 0, quad core i5 750, everything is defragged, but the only way I found to keep it's responsiveness optimal is to shutdown(dumps the memory) and the start; a restart of the guest OS doesnt dump the memory so I need to be able to do a stop of the VM, and then a start. Coming from Hyper-V I had to learn VMWare and after a few months of fine tunning it I'm quite impressed with how configurable VMWare is. This is the only small issue I haven't been able to fix, has anyone encountered this?

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• Problem with Win7 connecting to Internet

  - by Lucas

  Hello, I have had Windows 7 for about a year now and for the first four months it worked perfectly. But for the last 8 months it has been horrible. It will connect to the Internet for about 5 minutes and then just lose connection. It will reconnect in about 5 minues but then it just keeps disconnecting. I ran a virus scan about 2 weeks ago and I found a Trojan on my PC which I removed and dealt with. It was fine after that but now for these last couple days it has been just as bad as before. I think a virus is causing this but I will read any suggestions and tips to help me solve this problem. Thank you. PC DETAILS: OS: WIndows 7 Home Premium 64-Bit- System Model: Aspire M5802- Processor: Intel Core 2 Quad CPU- Memory: 8192MB RAM- Graphics Card: NVIDIA GeForce GT 220

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• Cannot install Nvidia drivers

  - by Sagar_R

  I have 12.04 running on Intel dual core with Nvidia 8400 GS. I had installed the post-relase updates for Nvidia, but encountered some problems, so removed [deactivated] them through "Aditional drivers". After restarting, when I went to install the recommended version current drivers through "Additional drivers", I get the following error: Sorry, installation of this driver failed. Please have a look at the log file for details: /var/log/jockey.log

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• Fundamentals of Vendor Management

  Creating and maintaining mutually beneficial relationships with external vendors is one of the pillars of good project management. Dwain Camps goes through what to expect and allow in your client-vendor relationship during the various stages of a given project to ensure its success and secure that all important win-win outcome. Save 45% on our top SQL Server database administration tools. Together they make up the SQL DBA Bundle, which supports your core tasks and helps your day run smoothly. Download a free trial now.

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• What is the best way to manage large 3d worlds (i.e minecraft style)?

  - by SomeXnaChump

  After playing minecraft I was marvelling a bit at their large worlds but at the same time finding it extremely slow to navigate, even with a quad core and meaty graphics card. Now I assume its fairly slow because: A) Its written in Java, and as most of the actual spatial partitioning and other memory management activities happen in there it would be slower than a native C++ version. B) They are not partitioning their world very well I could be wrong on both assumptions, however it got me thinking about the best way to manage large worlds. As it is more of a true 3d world, where a block can exist in any part of the world, it is basically a big 3d array [x][y][z], where each block in the world has a type (i.e BlockType.Empty = 0, BlockType.Dirt = 1 etc). Now I am assuming to make this sort of world performant you would need to: a) Use a tree of some variety (oct/kd/bsp) to split all the cubes out, it seems like an oct/kd would be the better option as you can just partition on a per cube level not a per triangle level. b) Use some algorithm to work out if the blocks within the scene can currently be seen, as blocks closer to the user could obfuscate the blocks behind, making it pointless to render them. c) Keep the block object themselves lightweight, so it is quick to add and remove them from the trees I guess there is no right answer to this, but I would be interested to see peoples opinions on the subject.

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• Limit a process's relative (not absolute) processor consumption in Linux

  - by BobBanana

  What is the standard way in Linux to enforce a system policy to limit the relative CPU use of a single process? That is, on a quad-core machine, I never want a process to use more than 2 CPUs at once, even if the process creates more threads. I do not want an absolute time limit, just a relative limit so that one task cannot dominate the machine. This is also different than renice, which allows a process to use all the resources but just politely step aside if others need them too. ulimit is the usual resource limiting tool, but it does not allow such CPU restrictions.. it can limit the number of processes per user, or absolute CPU time, not restrict the maximum number of active threads of a single process. I've found a couple of user-level tools, like CPUlimit, but not a system level tool or setting. Does such a standard resource controller exist in Linux (Red Hat Enterprise, if it matters.) If there is such a limit imposed, how would a user identify it?

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• ViewSonic PC Mini VOT132 Review

  Is that a paperweight on your desk? Oops, sorry, it's a PC -- a space- and energy-saving desktop hardly bigger than a VHS cassette, priced at just $449, but with a dual-core Intel Atom CPU and all the power that office productivity workers need.

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• Stream computer screen to TV via network instead of a USB wireless link

  - by user24559

  I want to stream my computer screen (not just video or a limited amount of content) to my TV via the network. I know there are wireless devices that use USB to tranfer the screen to the TV. However, these are limited to a short distance. What I want to do is stream the data via the network so I can be anywhere within the network and have the data shown on the tv. I am looking for video and sound to transfer. I want the entire computer screen to transfer just like when you connect the computer to the tv via VGA or HDMI and the sound out using the 3.5mm plug. I have been unable to find a unit that allows for the entire computer screen to transfer via the network. I just find the ability to stream video. I am using Windows 7 Ultimate with a quad processor and 16 GB of memory so I have the power to handle the transfer. My tv is hdtv.

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• No Webcam Device

  - by Aliyah

  deeva@androliyah-A6200:~$ sudo lshw -C video [sudo] password for deeva: *-display description: VGA compatible controller product: Core Processor Integrated Graphics Controller vendor: Intel Corporation physical id: 2 bus info: pci@0000:00:02.0 version: 02 width: 64 bits clock: 33MHz capabilities: msi pm vga_controller bus_master cap_list rom configuration: driver=i915 latency=0 resources: irq:43 memory:f0000000-f03fffff memory:e0000000-efffffff ioport:e080(size=8) deeva@androliyah-A6200:~$ How do I get my webcam to work?

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• Question about server usage, big community platform [closed]

  - by Json

  Possible Duplicate: How do you do Load Testing and Capacity Planning for Web Sites I’m working on a community platform writen in PHP, MySQL. I have some questions about the server usage maybe someone can help me out. The community is based on JQuery with many ajax requests to update content. It makes 5 - 10 AJAX(Json, GET, POST) requests every 5 seconds, the requests fetch user data like user notifications and messages by doing mySQL queries. I wonder how a server will handle this when there are for more than 5000 users online. Then it will be 50.000 requests every 5 seconds, what kind of server you need to handle this? Or maybe even more, when there are 15.000 users online, 150.000 requests every 5 seconds. My webserver have the following specs. Xeon Quad 2048MB 5000GB traffic Will it be good enough, and for how many users? Anyone can help me out or know where to find such information, like make a calculation?

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• Can I extend my total RAM by buying more, and what kind do I need to buy

  - by Xeon06

  I currently have 4 GB total RAM and I would like to get some more, to bring it to a total of 8 GB. Is it possible to simply buy another 4 GB and bring it to 8? If so, what kind should I be buying? There is a lot of different possibilities, DDR3, DDR2, clock speed, etc. I am kind of lost among all this. My current setup goes like this: ACER EG43M mainboard Intel(R) Core(TM)2 Quad CPU Q8200 @ 2.33GHz 4 total RAM slots, 2 occupied by 2 GB sticks According to CPU-Z, my memory type is DDR3 (not sure how reliable that is) Full CPU-Z dump Windows 7 64-bit So basically, I want to know whether it's possible to extend my current RAM to get 8 GB total by buying another 4, and if so, what kind of RAM do I need? Note that I am not looking for shopping recommendations. I'm worried about the hardware compatibility.

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• Require password to login to Nexus 7

  - by gnudoc

  The default behavior in the Nexus 7 Image is to log straight in to the default user's desktop, bypassing the lightdm greeter. This seems like an acceptable behavior for testing the core but it's clearly insecure. I've changed the default password and would like lightdm to actually require the password to be entered, rather than just having a button that says "login". I've turned automatic login on and off in System Settings ? User Accounts but this doesn't help. Any suggestions?

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• Notebook Review: Toshiba Tecra A11

  Toshiba's 15.6-inch business notebook doesn't skimp on features, with everything from an old-fashioned RS-232 port to facial recognition software, not to mention a fast Core i7 CPU and Nvidia graphics. Does this $1,349 laptop PC have the right stuff to serve as a desktop replacement?

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• "Inside Job"

  Embedded databases power back-end hardware, business applications, and portable devices everywhere. Find out how Oracle embedded databases live and work at the core of hardware, software, and other devices—and deliver cash, health, and security.

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• How To Harden PHP5 With Suhosin On CentOS 5.4

  <b>Howtoforge:</b> "This tutorial shows how to harden PHP5 with Suhosin on a CentOS 5.4 server. From the Suhosin project page: "Suhosin is an advanced protection system for PHP installations that was designed to protect servers and users from known and unknown flaws in PHP applications and the PHP core."

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• Notebook Review: Toshiba Tecra A11

  Toshiba's 15.6-inch business notebook doesn't skimp on features, with everything from an old-fashioned RS-232 port to facial recognition software, not to mention a fast Core i7 CPU and Nvidia graphics. Does this $1,349 laptop PC have the right stuff to serve as a desktop replacement?

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• Ubuntu 11.10 Random reboots how to find root cause?

  - by Indigo42

  All, This issue started with 11.04, I upgraded to 11.10 this week in hopes it would correct it, but after a few days it happened again.. A few times a day, randomly, my monitors will go black and the machine will come back in the post screen and boot up again. Sometimes it boots up properly, sometimes it boots to disk scan (I understand why...the machine just died with a bunch of stuff open) and sometimes it takes several cycles of this to come up. I connected to the system with my laptop and tailed dmesg, syslog, kern.log, and Xorg.0.log. I also ran a cat /proc/kmesg. Nothing is showing up in any of these log files when it happens..it's just like someone has pulled the plug. I just got through running 4 hours of the memory test with no errors. I have a AMD Phenom 9850 Quad-Core Processor and Nvida 9500GT graphics card. This system has been stable for like 4 years. I'm thinking it might be a hardware problem, but how do I find out? Thanks,

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• SEQUENCE in SQL Server 2011

  SEQUENCE is a core new feature of SQL Server 2011 (Denali). It is a more performant, flexible alternative to the INDENTITY attribute. This article introduces sequence and demonstrates how to use it and its performance advantage. Free trial of SQL Backup™“SQL Backup was able to cut down my backup time significantly AND achieved a 90% compression at the same time!” Joe Cheng. Download a free trial now.

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