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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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  • How do you dive into large code bases?

    - by miku
    What tools and techniques do you use for exploring and learning an unknown code base? I am thinking of tools like grep, ctags, unit-tests, functional test, class-diagram generators, call graphs, code metrics like sloccount and so on. I'd be interested in your experiences, the helpers you used or wrote yourself and the size of the codebase, with which you worked with. I realize, that this is also a process (happening over time) and that learning can mean "can give a ten minute intro" to "can refactor and shrink this to 30% of the size". Let's leave that open for now.

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  • Three Hidden Extensibility Gems in ASP.NET 4

    ASP.NET 4 introduces a few new extensibility APIs that live the hermit lifestyle away from the public eye. Theyre not exactly hidden - they are well documented on MSDN - but they arent well publicized. Its about time we shine a spotlight on them. PreApplicationStartMethodAttribute This new attribute allows you to have code run way early in the ASP.NET pipeline as an application starts up. I mean way early, even before Application_Start. This happens to also be before code in your App_code folder...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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  • Why use 3d matrix and camera in 2D world for 2d geometric figures?

    - by Navy Seal
    I'm working in XNA on a 2d isometric world/game and I'm using DrawUserPrimitives to draw some geometric figures... I saw some tutorials about creating dynamic shadows but I didn't understood why they use a "3d" matrix to control the transformations since the figure I'm drawing is in 2d perspective. I know I'm drawing a 2d figure in 3d but I still can't understand if I really need to work with the matrix. Is there any advantage in using a 3d Matrix to control camera and view? Any reason why I can't just update my vertex's positions by using a regular method since the view is always the same... And since I want to work only with single figures, won't this cause all the geometric figures have the same transformations simultaneously? To understand better what I mean here's a video http://www.youtube.com/watch?v=LjvsGHXaGEA&feature=player_embedded

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  • Server Side Developer Prerequisites

    - by Jking
    I am new to server side development and am currently learning node.js. What sort of networking information should I be familiar with to allow for a smooth learning curve with server side development. Could anyone provide resources pertaining to the information required to get into server programming? To give you a better idea of my standpoint: I do not know how a server interacts with a database [Q: How does a NoSQL database, or database in general, communicate with a server?] I am unsure of how a web stack works [Q: I have heard of LAMP but do not know how Apache, MySQL, and PHP interact. Hopefully this applies to other stacks as well. How do the components of a stack work together? Also, is a MEAN stack an alternative, or is it completely irrelevant to this] I have trivial knowledge of internet protocol [however extremely inefficient][Q: What resources are beneficial when learning about networking, and how much/what knowledge should I acquire to program on the server side] I am unsure of what I am unsure of concerning networking information necessary to start development Information on how the client-server model works would be greatly appreciated

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  • Is there an algorithm for a pool game?

    - by Dmitri
    Hello! I am looking for algorithm to calculate direction and speed of balls in a pool game. I am sure there has to be some type of open source code for this since pool games are some of the oldest computer games I can remember. I mean, when one ball hits another, I need a algorithm to calculate direction of both of them. It will depend of exact angle of where they hit each other and on speed. I want to practice Java coding, so I am looking for java code or package that has this type of code.

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  • How to use MythBuntu to send TV signal to a 2nd frontend

    - by Mark Preston
    I guess the a MythTV or MythBuntu backend acts as a "server" for the frontends. I have MythBuntu installed. It runs fine, I can tune live TV, hear the sound, etc. To get this to work, I had to config the Wired Network IP4V settings to Method: Link-Local Only. The Local Backend IP address is: 127.0.0.1 and the info (bottom of screen) says that if there is another frontend, that this IP add. must be changed. 1 - Does this mean changed to the IP address of the 2nd frontend? 2 - What "Method" do I use to make 2 or more frontends? 3 - I have an ethernet switch which currently "sees" the tv signal, sends it to the computer's ethernet port where Mythbuntu makes use of it. 4 - How do I set up the Myth to send it's output (the tv shows) to both televisions? If you know of a How-To, or website, please give the URL or identifying keywords.

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  • Favorite, Well-Known Characters as Pacman Ghosts [Humorous Image]

    - by Asian Angel
    Can you name them all? Note: Ryan has a complete list of all the characters at his Flickr page if you find any that you are unable to identify. Pacman Ghosts – Ryan “Dash” Coleman (Flickr) [via Neatorama] 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? HTG Explains: How Windows 8′s Secure Boot Feature Works & What It Means for Linux

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  • Little Wheel Is An Atmospheric and Engaging Point-and-Click Adventure

    - by Jason Fitzpatrick
    If you’re a fan of the resurgence of highly stylized and atmospheric adventure games–such as Spirit, World of Goo, and the like–you’ll definitely want to check out this well executed, free, and more than a little bit charming browser-based game. Little Wheel is set in a world of robots where, 10,000 years ago, a terrible accident at the central power plant left all the robots without power. The entire robot world went into a deep sleep and now, thanks to a freak lightning strike, one little robot has woken up. Your job, as that little robot, is to navigate the world of Little Wheel and help bring it back to life. Hit up the link below to play the game for free–the quality of the visual and audio design make going full screen and turning the speakers on a must. Little Wheel [via Freeware Genuis] 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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  • Does FFMpeg support gpu acceleration of media encoding/decoding?

    - by Jason123
    I was wondering if ffmpeg supported gpu acceleration. I was reading on their websites and came across contradicting information. http://www.ffmpeg.org/general.html#Video-Codecs -H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 (VDPAU acceleration) http://ffmpeg.org/trac/ffmpeg/wiki/x264EncodingGuide -Will a graphics card make x264 encode faster? No. libx264 doesn't use them (at least not yet). There are some proprietary encoders that utilize the GPU, but that does not mean they are well optimized, though encoding time may be faster; and they might be worse than x264 anyway, and possibly slower. Regardless, FFmpeg today doesn't support any means of gpu encoding, outside of libx264. If not, is there any way to add gpu acceleration to h.264 encoding/decoding?

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  • Has RFC2324 been implemented?

    - by anthony-arnold
    I know RFC2324 was an April Fools joke. However, it seems pretty well thought out, and after reading it I figured it wouldn't be out of the question to design an automated coffee machine that used this extension to HTTP. We programmers love to reference this RFC when arguing web standards ("418 I'm a Teapot lolz!") but the joke's kind of on us. Ubiquitous computing research assumes that network-connected coffee machines are probably going to be quite common in the future, along with Internet-connected fruit and just about everything else. Has anyone actually implemented a coffee machine that is controlled via HTCPCP? Not necessarily commercial, but hacked together in a garage, maybe? I'm not talking about just a web server that responds to HTCPCP requests; I mean a real coffee machine that actually makes coffee. I haven't seen an example of that.

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  • What is Atomicity?

    - by James Jeffery
    I'm really struggling to find a concrete, easy to grasp, explanation of Atomicity. My understanding thus far is that to ensure an operation is atomic you wrap the critical code in a locker. But that's about as much as I actually understand. Definitions such as the one below make no sense to me at all. An operation during which a processor can simultaneously read a location and write it in the same bus operation. This prevents any other processor or I/O device from writing or reading memory until the operation is complete. Atomic implies indivisibility and irreducibility, so an atomic operation must be performed entirely or not performed at all. What does the last sentence mean? Is the term indivisibility relating to mathematics or something else? Sometimes the jargon with these topics confuse more than they teach.

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  • Accidentally Uninstalled Ubuntu Desktop and Anacron. Reinstalled. What Can I Expect?

    - by Volomike
    Unfortunately when I installed the cron package to take a look at it, I didn't realize that I was also uninstalling Ubuntu Desktop and Anacron. Crap!!! So, I then did apt-get install anacron ubuntu-desktop, which also removed fcron. However, I need to know what instability issues I may now encounter because I have done this change and changed it back. I mean, now that anacron is back and ubuntu-desktop is back, am I out of the woods? Or, will I lose any important jobs that need to run periodically from anacron?

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  • Some mail details about Orange Mauritius

    Being an internet service provider is not easy after all for a lot of companies. Luckily, there are quite some good international operators in this world. For example Orange Mauritius aka Mauritius Telecom aka Wanadoo(?) aka MyT here in Mauritius. The local circumstances give them a quasi-monopol position on fixed lines for telephony and therefore cable-based DSL internet connectivity. So far, not bad but as usual... the details. Just for the records, I am only using the services of Orange for mobile but friends and customers are bound, eh stuck, with other services of Orange Mauritius. And usually, being the IT guy, they get in touch with me to complain about problems or to ask questions on either their ADSL / MyT connection, mail services or whatever. Most of those issues are user-related and easily to solve by tweaking the configuration of their computer a little bit but sometimes it's getting weird. Using Orange ADSL... somewhere else Now, let's imagine we are an Orange ADSL customer for ages and we are using their mail services with our very own mail address like "[email protected]". We configured our mail client like Thunderbird, Outlook Express, Outlook or Windows Mail as publicly described, and we are able to receive and send emails like a champion. No problems at all, the world is green. Did I mention that we have a laptop? Ok, let's take our movable piece of information technology and visit a friend here on the island. Not surprising, he is also customer of Orange, so we can read and answer emails. But Orange is not the online internet service provider and one day, we happen to hang out with someone that uses Emtel via WiMAX or UMTS.. And the fun starts... We can still receive and read emails from our Orange mail account and the IT world is still bright but try to send mails to someone outside the domain "@intnet.mu" or "@orange.mu". Your mail client will deny sending mail with SMTP message 5.1.0 "blah not allowed". First guess, there is problem with the mail client, maybe magically the configuration changed over-night. But no it is still working at home... So, there is for sure a problem with the guy's internet connection. At least, it is his fault not to have Orange internet services, so it can not work properly... The Orange Mail FAQ After some more frustation we finally checkout the Orange Mail FAQ to see whether this (obviously?) common problem has been described already. Sorry, but those FAQ entries are even more confusing as it is not really clear how to handle this scenario. Best of all is that most of the entries are still refering to use servers of the domain "intnet.mu". I mean Orange will disable those systems in favour of the domain "orange.mu" in the near future and does not amend their FAQs. Come on, guys! Ok, settings for POP3 are there. Hm, what about the secure version POP3S? No signs at all... Even changing your mail client to use password encryption with STARTTLS is not allowed at all. Use "bow.intnet.mu" for incoming mail... Ahhh, pretty obvious host name. I mean, at least something like pop.intnet.mu or pop3.intnet.mu would have been more accurate. Funny of all, the hostname "pop.orange.mu" is accessible to receive your mail account. Alright, checking SMTP options for authentication or other like POP-before-SMTP or whatever well-known and established mechanism to send emails are described. I guess that spotting a whale or shark in Mauritian waters would be easier. Trial and error on SMTP settings reveal that neither STARTTLS or any other connection / password encryption is available. Using SSL/TLS on SMTP only reveals that there is no service answering your request. Calling customer service So, we have to bite into the bitter apple and get in touch with Orange customer service and complain/explain them our case and ask for advice. After some hiccups, we finally manage to get hold of someone competent in mail services and we receive the golden spoon of mail configuration made by Orange Mauritius: SMTP hostname: smtpauth.intnet.mu And the world of IT is surprisingly green again. Customer satisfaction? Dear Orange Mauritius, what's the problem with this information? Are you scared of mail spammer? Why isn't there any case in your FAQs? Ok, talking about your FAQs - simply said: they are badly outdated! Configure your mail client to use server name based in the domain intnet.mu but specify your account username with orange.mu as domain part. Although, that there are servers available on the domain orange.mu after all. So, why don't you provide current information like this: POP3 server name: pop.orange.muSMTP server name: smtp.orange.muSMTP authenticated: smtpauth.orange.mu It's not difficult, is it? In my humble opinion not really and you would provide clean, consistent and up-to-date information for your customers. This would produce less frustation and so less traffic on your customer service lines. Which after all, would improve the total user experience and satisfaction level on both sides. Without knowing these facts. Now, imagine you would take your laptop abroad and have to use other internet service providers to be able to be online... Calling your customer service would be unnecessary expensive!

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  • ORA - 01033 Error in Java

    - by user1721921
    Today I am getting below error in J2EE application: java.sql.SQLException: ORA-01033: ORACLE initialization or shutdown in progress at java.lang.Throwable.<init>(Throwable.java) at java.lang.Throwable.<init>(Throwable.java) at java.sql.SQLException.<init>(SQLException.java:53) at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134) at oracle.jdbc.ttc7.TTIoer.processError(TTIoer.java:289) at oracle.jdbc.ttc7.O3log.receive1st(O3log.java:408) at oracle.jdbc.ttc7.TTC7Protocol.logon(TTC7Protocol.java:260) at oracle.jdbc.driver.OracleConnection.<init>(OracleConnection.java:365) at oracle.jdbc.driver.OracleDriver.getConnectionInstance(OracleDriver.java:547) at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:347) at oracle.jdbc.pool.OracleDataSource.getConnection(OracleDataSource.java:169) at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPhysicalConnection(OracleConnectionPoolDataSource.java:149) at oracle.jdbc.pool.OracleConnectionPoolDataSource.getPooledConnection(OracleConnectionPoolDataSource.java:95) Can someone please let me know what does that error mean?

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  • How do I fix a "E: The method driver /usr/lib/apt/methods/http could not be found." error?

    - by Abe
    I tried updating my packages from the terminal and this is what I got: $ sudo apt-get update E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. What does this mean? I'm using the United States mirror an I've tried using the main server for the mirror and I keep getting the same result is this because there are no updates?

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  • Has anyone got Ubuntu Touch working on Nexus 5?

    - by user1628
    I have been debating whether to get a nexus 5 phone since it came out. My only fear is that I won't like android. I love ubuntu, I know that I'd love ubuntu. So I have a few question related to Ubuntu Touch: Is it easy or possible to switch between Ubuntu Touch and Android? Would I have to keep hacking the phone? Can I dual boot them? Would I lose my data every time I switch? The nexus 5 isn't mentioned here: https://wiki.ubuntu.com/Touch/Devices Does that mean it simply won't work if I follow the porting instructions? Would I have to do a bit of hacking? Has anyone got it working? Will it eventually be supported?

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  • How does the GPL work in regards to languages like Dart which compile to other languages?

    - by Peter-W
    Google's Dart language is not supported by any Web Browsers other than a special build of Chromium known as Dartium. To use Dart for production code you need to run it through a Dart-JavaScript compiler/translator and then use the outputted JavaScript in your web application. Because JavaScript is an interpreted language everyone who receives the "binary"(Aka, the .js file) has also received the source code. Now, the GNU General Public License v3.0 states that: "The “source code” for a work means the preferred form of the work for making modifications to it." Which would imply that the original Dart code in addition to the JavaScript code must also be provided to the end user. Does this mean that any web applications written in Dart must also provide the original Dart code to all visitors of their website even though a copy of the source code has already been provided in a human readable/writable/modifiable form?

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  • Staying Ahead of the Curve - Deloitte's 2012 Human Capital Trends Webcast | June 13th

    - by Jay Richey, HCM Product Marketing
    Businesses today are calling on HR to leap ahead and help to manage change in the face of complex challenges that touch so many parts of the enterprise. This webinar will provide an overview of eight major Human Capital Trends surfacing in 2012. Understanding the trends — what they mean for both leading HR and for leading the business — is an opportunity for organizations to be proactive and stay ahead of the curve. June 13, 2012 12:00 p.m. – 2:00 p.m. CT Online Featured Speakers: Michael Gretczko Principal, Deloitte Consulting LLP, Human Capital Practice Dan Helfrich Principal, Deloitte Consulting LLP, Federal Human Capital Practice Leader Greg Vert Senior Consultant, Deloitte Consulting Evite & Registration:  http://www.oracle.com/us/dm/75810-wwmk11040178mpp035c007-oem-1633667.html

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  • Is it possible to install ZSNES Emulator from default software sources?

    - by Mike L
    I can find it listed when I search for "zsnes" in the Ubuntu Software Center but it doesn't have the "Install" button. If I click the "More information" button I'll get a "package not found" message. Synaptic can't find this package either. (from user @REJ) I have Natty 64bit. When I run sudo apt-get install zsnes it gives the following output: Reading package lists... Done Building dependency tree Reading state information... Done Package zsnes is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'zsnes' has no installation candidate

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  • August issue of the Enterprise Manager Indepth Newsletter

    - by Javier Puerta
    The August issue of the Enterprise Manager Indepth Newsletter is now available here. NEWS Oracle OpenWorld 2014 Preview: Don't-Miss Sessions, Hands-on Labs, and More Organizers of Oracle OpenWorld 2014, taking place in San Francisco from September 28 to October 2, expect heavy turnout at sessions, hands-on labs, and customer panels devoted to Oracle Enterprise Manager 12c. Find out who is participating and which sessions are most recommended by the Oracle Enterprise Manager team.Read More Press and Analysts Welcome Oracle Enterprise Manager 12c Release 4 Launched in June, Oracle Enterprise Manager 12c Release 4 is winning praise for its ability to dramatically accelerate private cloud adoption, as well as for its groundbreaking database and middleware management capabilities. Find out what the community has to say about the new release.Read More Q&A: Oracle's Andrew Sutherland on Managing the Entire Oracle Stack with Oracle Enterprise Manager 12c Hear from Oracle expert Dr. Andrew Sutherland about the unique capabilities of the latest release of Oracle Enterprise Manager 12c—and what they mean for managing your IT across cloud and traditional IT deployments.Read More Read full newsletter here

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  • What options do individual have to fork a project?

    - by skrco
    Let's assume our example individual has an idea, engagement, ... to fork project. By project I mean any kind of software - thick client, web site, portal, service, driver, plc, ... - anything that can be programmed. Motto of question: What options do our example individual have to fork this project from the early beginning through getting collaborators and users to mature software? Here are the main subquestions: Sandbox phase: Where can he announce his idea and proposal and receive positive/negative critic and feedback? Development phase: Where can he build his team to work on this project? Yet deployed phase: Where can he schedule tasks, assign tickets and bugs to be solved? and the list can go on... What really interests me is the "sandbox phase question".

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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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  • Why doesn't the command do-release-upgrade doesn't require sudo?

    - by Dr_Bunsen
    I was wondering why the command do-release-upgrade doesn't require sudo? I mean, it does significantly change your system, so I would have guessed it requires sudo. This is from ubuntu self, but it isn't that helpful. I just want to know how this is secure for the integrity for my system, if every user can access this command. Thanks in advance. [EDIT]: I used a new terminal window, thus no sudo that wasn't expired yet, and I used the command do-release-upgrade NOT sudo do-release-upgrade.So even with unexpired sudo I should be unable to upgrade. [EDIT 2]:

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  • Using subdomains or directories for main categories?

    - by Matthieu
    I have a website which references places to travel to in the world. Those places are (of course) grouped by countries. Here is an example of an actual URL of my website: http://awespot.org/country/105/iceland I am wondering if it would be better, in terms of SEO, to have the countries separated in subdomains: http://iceland.awespot.org/ I know subdomains are considered by Google as different websites, so I am considering the 2 options: separating would mean also separating the pagerank and benefits of links to the website but separating would enable me to create a "web" or related websites (all related to travel and all) that link and benefit to each other I am only asking about SEO here, I know there are other questions raised by this possibility (user experience, administration... even password completion by web browsers)

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