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• Electrified Light Saber Helps You Slay Bugs Like a Jedi [Video]

  - by Jason Fitzpatrick

  This fun little DIY project combines a toy light saber with the guts of an electrified fly-swatter to yield a bug slaying sword perfect for your epic battles against the Empire’s tiniest soldiers. Courtesy of Caleb over at Hack A Day, the build is surprisingly simple and quick to put together (if you’re handy with a screw driver and soldering iron). Check out the video above to see the build and the results or hit up the link below to read more about it. Building a Bug Zapping Light Saber [Hack A Day] How to Make Your Laptop Choose a Wired Connection Instead of Wireless HTG Explains: What Is Two-Factor Authentication and Should I Be Using It? HTG Explains: What Is Windows RT and What Does It Mean To Me?

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• How to avoid HDD spin up at system start? (Ubuntu from SSD)

  - by Oliver

  Thanks to hdparm -B1 /dev/sdb my HDD does no longer spin up when powered up on boot. But after completing the BIOS POST messages and starting Ubuntu the HDD gets a signal over the SATA data cable and spins up. Leaving the data cable (but still with plugged in SATA power cable) let the system boot up completely from my SSD without spinning up the HDD. What causes the HDD to spin up? Maybe Grub2? Edit: nope, doesn't seem to be Grub2 that spins up the drive. I just set up Grub to show its menu without timer. Nothings happens until I hit the Ubuntu standard boot option, then a few seconds later the drive spins up.

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• Code Monster Helps Introduce Kids (and Curious Adults) to the Basics of Programming

  - by Jason Fitzpatrick

  If you’re looking for a fun way to introduce a kid to programming (or sate your own curiosity), Crunchzilla’s Code Monster is a real-time introduction to basic programming concepts. How does Code Monster work? Users are guided through the programming experience (using JavaScript) by a talkative blue monster that asks questions about the code and suggests courses of action. Play long enough and you travel from simple variables to more complex ideas like conditionals, expressions, and more. It’s not a comprehensive programming curriculum (nor does it claim to be) but it’s a great way to introduce people of all ages to programming. Hit up the link below to take it for a spin. Code Monster [via O'Reilly Radar] 8 Deadly Commands You Should Never Run on Linux 14 Special Google Searches That Show Instant Answers How To Create a Customized Windows 7 Installation Disc With Integrated Updates

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• Oracle Fusion Middleware at Oracle OpenWorld Spotlighted on Forbes

  - by Tanu Sood

  In case you missed it, while we were at Oracle OpenWorld 2013, Oracle Voice on Forbes hit the spotlight on the Oracle Fusion Middleware keynote by Executive Vice President of Oracle, Thomas Kurian. The feature discusses the investment Oracle is making in middleware and goes on to discuss the primary themes that are guiding research & development for Oracle Fusion Middleware namely: uptake of key technology trends Social, Mobile and Cloud, and the continued commitment to empowerment of business users. The feature calls out specific investments made on those fronts marked by recent product releases and  new capabilities added across the entire Oracle Fusion Middleware product stack. Whether you are an applications user or a middleware buff, this feature might be worth a read. And don't forget to catch up on our ongoing series capturing the highlights from Oracle OpenWorld across all the Oracle Fusion Middleware solution sets.

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• Microsoft releases Bing iPhone app

  As its officials have been hinting and promising for a while now, Microsoft announced it has developed a version of its Bing search app for the iPhone. The new Bing app is available on the iPhone app store as of tonight (December 15). Microsoft already offers Bing on a number of mobile phones, and has a five-year deal with Verizon to provide Bing on a number of phones available to Verizon Wireless customers. A mobile version of Bing already is available for Windows Mobile, Blackberry, BREW and Sidekick devices on Verizon. In other Bing news, Microsoft has finally hit the 10 percent market share mark with Bing, according to the November U.S. search share data from comScore. Bing’s growth is continuing to come at the expense of Yahoo, not Google. Update: To those wondering why Microsoft would deliver a version of Continue... span.fullpost {display:none;}

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• How to handle possible duplicate content across multiple sites?

  - by ElHaix

  Let's say I have two sites that cover the same vertical/topic. one in the USA and one in Canada. Both sites have local-related content, which is obviously unique by location. However they will share common news or blog pages. How do I avoid getting hit with duplicate content on both sites for those news/blog pages? If the content is exactly the same, I'm guessing I would have to pick which site's content I want to noindex,nofollow, is that correct, and if so, is that all I have to add on the URL links to those pages, and the pages' meta tags?

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• Is there any reason to allow Yahoo! Slurp to crawl my site?

  - by James Skemp

  I thought a year or more ago Yahoo! would be using another search engine for results, and no longer using their own Slurp bot. However, a couple of the sites I manage Yahoo! Slurp continues to crawl pages, and seems to ignore the Gone status code when returned (as it keeps coming back). Is there any reason why I wouldn't want to block Yahoo! Slurp via robots.txt or by IP (since it tends to ignore robots.txt in some cases anyways)? I've confirmed that when the bot does hit it is from Yahoo! IPs, so I believe this is a legit instance of the bot. Is Yahoo Search the same as Bing Search now? is a related question, but I don't think it completely answers whether one should add a new block of the bot.

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• grub2 loopback booting ubuntu server iso

  - by Thermionix

  I've got usb-keys setup to multi-boot different linux images using grub2 loopback. The standard ubuntu release isos boot fine, however when attempting to use the server iso it will fail to install saying 'unable to detect cd-media for installation'. the grub.cfg entry; menuentry "ubuntu-12.04-server-amd64" { set isofile="/boot/ubuntu-12.04-server-amd64.iso" loopback loop $isofile linux (loop)/install/vmlinuz file=$isofile/preseed/ubuntu-server.seed ro noprompt noeject -- initrd (loop)/install/initrd.gz } I've attempted to add the following parameters as the fromiso works for debian images on the key iso-scan/filename=/boot/ubuntu-12.04-server-amd64.iso iso-scan/filename=/dev/disk/by-uuid/2859-44B7/boot/ubuntu-12.04-server-amd64.iso fromiso=/dev/disk/by-uuid/2859-44B7/boot/ubuntu-12.04-server-amd64.iso

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• Monitor resolution messed up, monitor is unknown.

  - by Kaustubh P

  Is there anyway to reset my monitor? My moitor is using the xorg.conf file. I use 10.04, without any Graphics Card. My monitor is an Acer X193W, with a native resolution of 1440x900. This is my xorg.conf file: Section "Screen" Identifier "Configured Screen Device" Device "Configured Video Device" Monitor "Test" DefaultDepth 16 SubSection "Display" Depth 16 Modes "1440x900_60.00" EndSubSection EndSection #Section "Device" # Identifier "Configured Video Device" # HorizSync # VertRefresh #EndSection I still cant view the native resolution, even when defined in the xorg file. An way I can revert to the default, or delete some files, to make the system detect the monitor again? My last resort is the cvt method, and adding it to the xrandr file. EDIT: I use Intel Drivers. My /proc/fb contains 0 VGA16 VGA

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• Collision detection of convex shapes on voxel terrain

  - by Dave

  I have some standard convex shapes (cubes, capsules) on a voxel terrain. It is very easy to detect single vertex collisions. However, it becomes computationally expensive when many vertices are involved. To clarify, currently my algorithm represents a cube as multiple vertices covering every face of the cube, not just the corners. This is because the cubes can be much bigger than the voxels, so multiple sample points (vertices) are required (the distance between sample points must be at least the width of a voxel). This very rapidly becomes intractable. It would be great if there were some standard algorithm(s) for collision detection between convex shapes and arbitrary voxel based terrain (like there is with OBB's and seperating axis theorem etc). Any help much appreciated.

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• Cool Cleaner for Android Makes Cache and History Wiping a Snap

  - by Jason Fitzpatrick

  Cool Cleaner for Android is a free application that consolidates the process of clearing the varies caches and histories on your Android dead-simple wiping. If you frequently clear the cache and history files for applications on your phone, Cool Cleaner will save you a ton of time. Rather than navigating to various applications and sub-menus to clear out the cache and the history, Cool Cleaner acts as a dashboard for all your apps. From the History and Cache tabs in the app you can wipe everything from your outgoing call log to your Market search history and more. If the app has a history file or cache you can wipe it from Cool Cleaner–including non-stock apps like Facebook, TweetDeck, game apps, etc. Cool Cleaner is a free ad-supported application. Hit up the link below to read more and grab a copy. Cool Cleaner [Android Market via Addictive Tips] How To Make a Youtube Video Into an Animated GIFHTG Explains: What Are Character Encodings and How Do They Differ?How To Make Disposable Sleeves for Your In-Ear Monitors

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• User-Defined Customer Events & their impact (FA Type Profile)

  - by Rajesh Sharma

  CC&B automatically creates field activities when a specific Customer Event takes place. This depends on the way you have setup your Field Activity Type Profiles, the templates within, and associated SP Condition(s) on the template. CC&B uses the service point type, its state and referenced customer event to determine which field activity type to generate.   Customer events available in the base product include: Cut for Non-payment (CNP) Disconnect Warning (DIWA) Reconnect for Payment (REPY) Reread (RERD) Stop Service (STOP) Start Service (STRT) Start/Stop (STSP)   Note the Field values/codes defined for each event.   CC&B comes with a flexibility to define new set of customer events. These can be defined in the Look Up - CUST_EVT_FLG. Values from the Look Up are used on the Field Activity Type Profile Template page.     So what's the use of having user-defined Customer Events? And how will the system detect such events in order to create field activity(s)?   Well, system can only detect such events when you reference a user-defined customer event on a Severance Event Type for an event type Create Field Activities.     This way you can create additional field activities of a specific field activity type for user-defined customer events.   One of our customers adopted this feature and created a user-defined customer event CNPW - Cut for Non-payment for Water Services. This event was then linked on a Field Activity Type Profile and referenced on a Severance Event - CUT FOR NON PAY-W. The associated Severance Process was configured to trigger a reconnection process if it was cancelled (done by defining a Post Cancel Algorithm). Whenever this Severance Event was executed, a specific type of Field Activity was generated for disconnection purposes. The Field Activity type was determined by the system from the Field Activity Type Profile referenced for the SP Type, SP's state and the referenced user-defined customer event. All was working well until the time when they realized that in spite of the Severance Process getting cancelled (when a payment was made); the Post Cancel Algorithm was not executed to start a Reconnection Severance Process for the purpose of generating a reconnection field activity and reconnecting the service.   Basically, the Post Cancel algorithm (if specified on a Severance Process Template) is triggered when a Severance Process gets cancelled because a credit transaction has affected/relieved a Service Agreement's debt.   So what exactly was happening? Now we come to actual question as to what is the impact in having a user-defined customer event.   System defined/base customer events are hard-coded across the entire system. There is an impact even if you remove any customer event entry from the Look Up. User-defined customer events are not recognized by the system anywhere else except in the severance process, as described above.   There are few programs which have routines to first validate the completion of disconnection field activities, which were raised as a result of customer event CNP - Cut for Non-payment in order to perform other associated actions. One such program is the Post Cancel Algorithm, referenced on a Severance Process Template, generally used to reconnect services which were disconnected from other Severance Event, specifically CNP - Cut for Non-Payment. Post cancel algorithm provided by the product - SEV POST CAN does the following (below is the algorithm's description):   This algorithm is called after a severance process has been cancelled (typically because the debt was paid and the SA is no longer eligible to be on the severance process). It checks to see if the process has a completed 'disconnect' event and, if so, starts a reconnect process using the Reconnect Severance Process Template defined in the parameter.    Notice the underlined text. This algorithm implicitly checks for Field Activities having completed status, which were generated from Severance Events as a result of CNP - Cut for Non-payment customer event.   Now if we look back to the customer's issue, we can relate that the Post Cancel algorithm was triggered, but was not able to find any 'Completed' CNP - Cut for Non-payment related field activity. And hence was not able to start a reconnection severance process. This was because a field activity was generated and completed for a customer event CNPW - Cut for Non-payment of Water Services instead.   To conclude, if you introduce new customer events that extend or simulate base customer events, the ones that are included in the base product, ensure that there is no other impact either direct or indirect to other business functions that the application has to offer.  

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• Basic Form Properties and Modality in VB.NET

  Creating your First VB.NET Form 1. Launch Microsoft Visual Basic 2008 Express Edition. If you do not have this program, then you cannot create VB.NET forms. You can read an introductory tutorial on how to install Visual Basic on your computer: http://www.aspfree.com/c/a/VB.NET/Visual-Basic-for-Beginners/ 2. Go to File - gt; New Project. 3. Since you will be creating a form, select Windows Forms Application. 4. Select a name for your form project, e.g. MyFirstForm. 5. Hit OK to get started. 6. You will then see an empty form -- just like an empty canvas when you paint. It looks like th...

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• Schedule sending mail of a log file content

  - by user3215

  I have postfix mail agent installed and I've configured gmail relay and I could send mails from the terminal as below: root@statino1:~# mail -s "subject_here" [email protected] CC: <hit enter for empty cc> Type the mesage here press Ctrl+d I have to send a log file contents as a mail and schedule it to run everyday. How do I send log file contents as mail message, how do I automate the inputs of mail command? so that I can schedule it. Anybody has any idea?

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• How do you upgrade/remove a side-by-side installation?

  - by d3vid

  I've hit some snags in the last two upgrades (which I've been able to resolve with time, patience and AskUbuntu :) so come 12.04 I'm considering a side-by-side installation. Perhaps even installing a pre-release before that (because virtual machine testing can't reveal hardware-related issues). So, let's say I installed a side-by-side version. As far as I can tell this splits my existing partition and installs a brand new Ubuntu on partition 2. If all goes well, there are no hardware issues, and my favorite apps seem to be working, how do I switch to a one-sided installation? If I can't, how do I do a side-by-side installation the next time? (And, am I crazy to consider using a pre-release version to do a side-by-side installation?)

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• How can I locate empty space next to polygon regions?

  - by Stephen

  Let's say I have the following area in a top-down map: The circle is the player, the black square is an obstacle, and the grey polygons with red borders are walk-able areas that will be used as a navigation mesh for enemies. Obstacles and grey polygons are always convex. The grey regions were defined using an algorithm when the world was generated at runtime. Notice the little white column. I need to figure out where any empty space like this is, if at all, after the algorithm builds the grey regions, so that I can fill the space with another region. Basically what I'm hoping for is an algorithm that can detect empty space next to a polygon.

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• Setting up collision using a tilemap and cocos2d

  - by James

  I'm building my first platformer using cocos2d and a tilemap. I'm having trouble coming up with a decent way of determining if the character is colliding with an object. More specifically, in which direction is the character colliding with an object. Following the tutorial here, I have made a separate "meta" layer of collidable tiles. The problem is that unless the character is in the tile, you can't detect the collision. Also, there's no way of telling WHERE the collision is occurring. The best solution would be one that could tell me if a character is up against a wall, or walking on top of a platform. However, I can't seem to figure out a good technique for this.

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• How to implement Cache in web apps?

  - by Jhonnytunes

  This is really two questions. Im doing a project for the university for storing baseball players statitics, but from baseball data I have to calculate the score by year for the player who is beign displayed. The background is, lets say 10, 000 users hit the player "Alex Rodriguez", the application have to calculate 10, 000 the A-Rod stats by years intead of just read it from some where is temporal saved. Here I go: What is the best method for caching this type of data? Do I have to used the same database, and some temporal values on the same database, or create a Web Service for that? What reading about web caching so you recommend?

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• SEO optimisation problems after Google Panda [on hold]

  - by Daniel West

  I am currently trying to improve a website's SEO after it took quite a hit from the Google Panda upgrades. What are the main things I need to look at improving when trying to improve its ranking in Google? I have already made sure that the pages validate to W3C Standards, minimized css and js and done the obvious meta tags and header optimization but this hasn't made any difference yet. It could possibly be a content issue as the pages currently read much like a brochure and there were some pages with just a video and no text content on them which is also an issue. I've added a rel="nofollow" attribute to the links to these pages although i'm told this doesn't really work anymore. If anyone has any ideas let me know. Cheers!

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• Running 32-bit Firefox with sun-jre in 64-bit Ubuntu

  - by rojanu

  I am trying to run juniper networks connect program to vpn into work and it only works on 32bit sun jre. All the things I have found with google failed so far. I can't use any scripts, like madscientists, as part of the authentication I need to provide some random characters from a grid. So to isolate this 32bit app install to a corner, I downloaded firefox and jre and unpack them to /opt. I run firefox with sudo as Juniper asks for root password. Here is Firefox plugins folder /ot/firefox32/plugins# ls -la total 8 drwxr-xr-x 2 root root 4096 Mar 11 00:57 . drwxr-xr-x 11 root root 4096 Mar 10 23:48 .. lrwxrwxrwx 1 root root 49 Mar 11 00:57 libnpjp2.so -> /opt/java/32/jdk1.6.0_31/jre/lib/i386/libnpjp2.so Firefox lists sun jre but when check it with "http://java.com/en/download/installed.jsp" it either can't detect java or Firefox freezes Any Ideas? Thanks

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• Roll Your Own DIY Solar-Powered Security Camera Setup

  - by Jason Fitzpatrick

  If you’re looking to set up a security camera without running power or video lines, this solar-powered version combines a cheap Wi-Fi cam with a home-rolled solar setup to provide surveillance without wires. Courtesy of Reddit user CheapGuitar, the setup combines a dirt cheap off-brand Wi-Fi security camera, a Tupperware container spray painted black, some old camping solar panels, and a battery into a security camera that checks in as long as it’s in range of a Wi-Fi router or repeater. Hit up the link below to check out the build guide. Solar Powered Camera [via Hack A Day] HTG Explains: What Is Windows RT & What Does It Mean To Me? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux Hack Your Kindle for Easy Font Customization

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• First time android game development [on hold]

  - by Dave

  My friend and i are developing a android game. This is my first time develop android game, so we don't know how to code The game is 2d game and we develop it without 3rd party engine / framework. Now we got a few questions, hope you can help us. In game play, using 'Surfaceview' only to achieve it. Is it best practice? On 'Surfaceview', a lot of difference button(Menu, pause, game object..etc) is on it, but I don't know how to code it? (actually, i have already done, but...so stupid way. Detect the user touch position (x, y) to identify where they touch[rect(x1,y1,x2,y2).contain(x,y)] Is it right? Teach me how to do if wrong. View / Surfaceview / OpenGL, which is suitable for us? (if like Tetris) Thank you for your help. Ps: My english is not good, hope you can understand what i mean.

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• Geek Deals: Discounted Monitors, Cheap Peripherals, and Free Apps

  - by Jason Fitzpatrick

  Looking to save some cash while stocking up on computers, peripherals, apps, and other goodies? Hit up our deal list for discounts on all manner of geeky gear. We’ve combed the net and grabbed some fresh off the press deals for you to take advantage of. Unlike traditional brick and mortar sales internet deals are fast and furious so don’t be surprised if by the time you get to a particularly hot deal the stock is gone or the uses-per-coupon rate has been exceeded. How To Encrypt Your Cloud-Based Drive with BoxcryptorHTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)

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• SQLAuthority News Spot the SQLAuthority Baby Contest SQL Server Cheat Sheet

  Last Year during the TechEd India 2009 SQL Server Cheat Sheets were instant hit. Yesterday when I announce that I am going to attend TechED India 2010 at Bangalore, I received many requests for the same. I have only 30 copies available at this moment. I will print more copies of the same after this [...]...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• The Batcave in LEGO

  - by Jason Fitzpatrick

  There seems to be something of an arms race afoot among hardcore LEGO enthusiasts, but given the awesome fruits of their labor we’re not about to attempt an intervention. This amazing diorama, complete with functioning lighting, is a 20,000 piece tribute to the Batcave. Courtesy of builders Wayne Hussey and Carlyle Livingston, we’re treated to a Batcave rendition in LEGO that’s so detailed the close-up shots feel like you can step right into them. Hit up the link below to check out more detailed photos and videos of the build. LEGO Batcave [via Make] HTG Explains: What is the Windows Page File and Should You Disable It? How To Get a Better Wireless Signal and Reduce Wireless Network Interference How To Troubleshoot Internet Connection Problems

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