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  • ipod not mounting

    - by rls
    Tried to connect my iPod, but got this message: Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sdb2, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so Have seen links to this here, but beeing rather green, I don't understand much. https://bugs.launchpad.net/ubuntu/+source/util-linux/+bug/734883 What do I do now? The dmesg|tail says [ 2819.709437] sd 6:0:0:0: [sdb] 3901376 4096-byte logical blocks: (15.9 GB/14.8 GiB) [ 2819.710161] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 2819.735294] sdb: [mac] sdb1 sdb2 [ 2819.738060] sd 6:0:0:0: [sdb] 3901376 4096-byte logical blocks: (15.9 GB/14.8 GiB) [ 2819.738671] sd 6:0:0:0: [sdb] Assuming drive cache: write through [ 2819.738688] sd 6:0:0:0: [sdb] Attached SCSI removable disk [ 2820.420130] sd 6:0:0:0: [sdb] Bad block number requested [ 2820.420167] hfs: unable to find HFS+ superblock [ 2820.612140] sd 6:0:0:0: [sdb] Bad block number requested [ 2820.612191] hfs: unable to find HFS+ superblock

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  • I can not download anything

    - by Jason Machen
    I am very new to ubuntu but decided to wipe my windows 7 and install it. I can not download anything from the software center. This is the error message I get. I can use the web in all other ways including this site. What can I do? Thanks, Jason W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/main/source/Sources 404 Not Found [IP: 91.189.91.13 80] W:Failed to fetch http://security.ubuntu.com/ubuntu/dists/raring-security/restricted Plus about 20 other lines.

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  • Free LINQPad is a great way to learn LINQ!

    - by CatherineRussell
    LINQPad is a great way to learn LINQ: it comes loaded with 500 examples from the book, C# 4.0 in a Nutshell.  There's no better way to experience the coolness of LINQ and functional programming. LINQPad is more than just a LINQ tool: it's an ergonomic C#/VB scratchpad that instantly executes any C#/VB expression, statement block or program with rich output formatting – the ultimate in dynamic development. Put an end to those hundreds of Visual Studio Console projects cluttering your source folder! Best of all, LINQPad standard edition is free and can run without installation (or with a low-impact setup). The executable is 3MB and is self-updating. To get it, go to: http://www.linqpad.net/

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  • What are the system requirements for each flavor of Ubuntu Desktop?

    - by Braiam
    I'm thinking about installing Ubuntu Desktop, but I don't know what flavor is the better for my system. What are the minimum and recommended hardware requirements? What kind of CPU? How much memory? Should I have Hardware Acceleration? What flavor should I use? This is an attempt of a canonical answer. My answers have the "official minimal requirements", the recommended are a mix of official sources and opinion based (along with the answer it's told the source). You can comment or edit if you feel that the information is obsolete or incomplete. Is a good rule of thumb that any system capable to run Windows Vista, 7, 8 x86 OS X will almost always be a lot faster with any Ubuntu flavor even if they are lower-spec than described below.

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  • If all variables are a subset of the superkey, is the database design 5NF? [migrated]

    - by Lukazoid
    I have a table called LogMessages, which has the following columns: Level A numeric value which represents Trace, Debug, Info, Warning, Error or Fatal Time A UTC time Message Foreign key to a Messages table Source Foreign key to a Sources table User Foreign key to a Users table From what I can see, all of these columns are a part of the super key; if any single value differs to an existing row, a new row can be created. My question is, does this design comply to fifth normal form? I am unsure as some groups of data will be repeating, however I don't believe this violates 5NF? (correct me if I'm wrong)

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  • Is acoustic fingerprinting too broad for one audio file only?

    - by IBG
    We were looking for some topics related to audio analysis and found acoustic fingerprinting. As it is, it seems like the most famous application for it is for identification of music. Enter our manager, who requested us to research and possible find an algorithm or existing code that we can use for this very simple approach (like it's easy, source codes don't show up like mushrooms): Always-on app for listening Compare the audio patterns to a single audio file (assume sound is a simple beep) If beep is detected, send notification to server With a flow this simple, do you think acoustic fingerprinting is a broad approach to use? Should we stop and take another approach? Where to best start? We haven't started anything yet (on the development side) on this regard, so I want to get other opinion if this is pursuit is worth it or moot.

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  • Quadratic Programming with Oracle R Enterprise

    - by Jeff Taylor-Oracle
         I wanted to use quadprog with ORE on a server running Oracle Solaris 11.2 on a Oracle SPARC T-4 server For background, see: Oracle SPARC T4-2 http://docs.oracle.com/cd/E23075_01/ Oracle Solaris 11.2 http://www.oracle.com/technetwork/server-storage/solaris11/overview/index.html quadprog: Functions to solve Quadratic Programming Problems http://cran.r-project.org/web/packages/quadprog/index.html Oracle R Enterprise 1.4 ("ORE") 1.4 http://www.oracle.com/technetwork/database/options/advanced-analytics/r-enterprise/ore-downloads-1502823.html Problem: path to Solaris Studio doesn't match my installation: $ ORE CMD INSTALL quadprog_1.5-5.tar.gz * installing to library \u2018/u01/app/oracle/product/12.1.0/dbhome_1/R/library\u2019 * installing *source* package \u2018quadprog\u2019 ... ** package \u2018quadprog\u2019 successfully unpacked and MD5 sums checked ** libs /opt/SunProd/studio12u3/solarisstudio12.3/bin/f95 -m64   -PIC  -g  -c aind.f -o aind.o bash: /opt/SunProd/studio12u3/solarisstudio12.3/bin/f95: No such file or directory *** Error code 1 make: Fatal error: Command failed for target `aind.o' ERROR: compilation failed for package \u2018quadprog\u2019 * removing \u2018/u01/app/oracle/product/12.1.0/dbhome_1/R/library/quadprog\u2019 $ ls -l /opt/solarisstudio12.3/bin/f95 lrwxrwxrwx   1 root     root          15 Aug 19 17:36 /opt/solarisstudio12.3/bin/f95 -> ../prod/bin/f90 Solution: a symbolic link: $ sudo mkdir -p /opt/SunProd/studio12u3 $ sudo ln -s /opt/solarisstudio12.3 /opt/SunProd/studio12u3/ Now, it is all good: $ ORE CMD INSTALL quadprog_1.5-5.tar.gz * installing to library \u2018/u01/app/oracle/product/12.1.0/dbhome_1/R/library\u2019 * installing *source* package \u2018quadprog\u2019 ... ** package \u2018quadprog\u2019 successfully unpacked and MD5 sums checked ** libs /opt/SunProd/studio12u3/solarisstudio12.3/bin/f95 -m64   -PIC  -g  -c aind.f -o aind.o /opt/SunProd/studio12u3/solarisstudio12.3/bin/ cc -xc99 -m64 -I/usr/lib/64/R/include -DNDEBUG -KPIC  -xlibmieee  -c init.c -o init.o /opt/SunProd/studio12u3/solarisstudio12.3/bin/f95 -m64  -PIC -g  -c -o solve.QP.compact.o solve.QP.compact.f /opt/SunProd/studio12u3/solarisstudio12.3/bin/f95 -m64  -PIC -g  -c -o solve.QP.o solve.QP.f /opt/SunProd/studio12u3/solarisstudio12.3/bin/f95 -m64   -PIC  -g  -c util.f -o util.o /opt/SunProd/studio12u3/solarisstudio12.3/bin/ cc -xc99 -m64 -G -o quadprog.so aind.o init.o solve.QP.compact.o solve.QP.o util.o -xlic_lib=sunperf -lsunmath -lifai -lsunimath -lfai -lfai2 -lfsumai -lfprodai -lfminlai -lfmaxlai -lfminvai -lfmaxvai -lfui -lfsu -lsunmath -lmtsk -lm -lifai -lsunimath -lfai -lfai2 -lfsumai -lfprodai -lfminlai -lfmaxlai -lfminvai -lfmaxvai -lfui -lfsu -lsunmath -lmtsk -lm -L/usr/lib/64/R/lib -lR installing to /u01/app/oracle/product/12.1.0/dbhome_1/R/library/quadprog/libs ** R ** preparing package for lazy loading ** help *** installing help indices   converting help for package \u2018quadprog\u2019     finding HTML links ... done     solve.QP                                html      solve.QP.compact                        html  ** building package indices ** testing if installed package can be loaded * DONE (quadprog) ====== Here is an example from http://cran.r-project.org/web/packages/quadprog/quadprog.pdf > require(quadprog) > Dmat <- matrix(0,3,3) > diag(Dmat) <- 1 > dvec <- c(0,5,0) > Amat <- matrix(c(-4,-3,0,2,1,0,0,-2,1),3,3) > bvec <- c(-8,2,0) > solve.QP(Dmat,dvec,Amat,bvec=bvec) $solution [1] 0.4761905 1.0476190 2.0952381 $value [1] -2.380952 $unconstrained.solution [1] 0 5 0 $iterations [1] 3 0 $Lagrangian [1] 0.0000000 0.2380952 2.0952381 $iact [1] 3 2 Here, the standard example is modified to work with Oracle R Enterprise require(ORE) ore.connect("my-name", "my-sid", "my-host", "my-pass", 1521) ore.doEval(   function () {     require(quadprog)   } ) ore.doEval(   function () {     Dmat <- matrix(0,3,3)     diag(Dmat) <- 1     dvec <- c(0,5,0)     Amat <- matrix(c(-4,-3,0,2,1,0,0,-2,1),3,3)     bvec <- c(-8,2,0)    solve.QP(Dmat,dvec,Amat,bvec=bvec)   } ) $solution [1] 0.4761905 1.0476190 2.0952381 $value [1] -2.380952 $unconstrained.solution [1] 0 5 0 $iterations [1] 3 0 $Lagrangian [1] 0.0000000 0.2380952 2.0952381 $iact [1] 3 2 Now I can combine the quadprog compute algorithms with the Oracle R Enterprise Database engine functionality: Scale to large datasets Access to tables, views, and external tables in the database, as well as those accessible through database links Use SQL query parallel execution Use in-database statistical and data mining functionality

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  • Programming Challenges for a beginner

    - by JMK
    I'm in an unusual situation. A colleague of mine wants to "learn programming" and, being a developer I have been tasked with teaching him "programming". Personally, I am self taught, and have never taught any sort of skill to anybody else before so I am not quite sure where to start. Also, I still have a heck of a lot to learn myself (although don't we all)! I write in C# but is C# a good language for a beginner? I was thinking that Visual Basic .Net would be a better starting point, so was considering getting him setup with Visual Studio Express 2010, teaching him a few basics (variables, functions, classes etc) then finding some programming challenges and asking him to work through these. Does anybody have a good source of these sorts of challenges? Also is this a good strategy? Finally, what are your experiences of teaching programming to somebody else and what advice would you give?

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  • Adding your website to free web directories as a link building strategy

    - by Man
    It's been two month I've launched a website. I recently ran into some websites which list directory of other websites. Some examples can be http://www.addgoogleurl.com/ and webdirectorieslist.com, etc. I was talking with my colleague and he says, adding the URL of my website to these kind of websites will negate the effect of other organic real links. Does google consider positive/negative points for these kind of links from web directory websites? Do you have any source for your answer to refer to? I found this question asked before on webmasters.SE, this is asking about many links from a website.

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  • Writing a basic shader for large input files

    - by Zoltan Varadi
    I started writing a shader for my iOS app and instead of starting from scratch i used this tutorial here: http://www.raywenderlich.com/3664/opengl-es-2-0-for-iphone-tutorial I wrote an import function, first to import wavefront .obj models. My problem is that with I can't handle larger inputs (with a simple cube it was working). I realized that the indices array is an array of GLubyte values, which is unsigned char, so as a result i cant have more than 256 indexes. I modified it to GLuint, but then only get a blank screen. What else needs to me modified? p.s.: the source can be downloaded from here: http://d1xzuxjlafny7l.cloudfront.net/downloads/HelloOpenGL.zip

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  • Confuse with OpenGL, SFML, and its library

    - by Robinson Joaquin
    I am a beginning to enter the world of game development. Lately, I researched that "OPENGL" is one of the tools to use in graphics, then I found out about "SFML" (I think that its a library or something that uses opengl). I am so confuse because all books/ sites said using "GLUT", but many people/fellow developers said that I must use a more updated one like "SFML" but sfml has few/none tutorials. What I am trying to say is "how to create own library or something like your own glut or sfml", and why does opengl has no source code? And how can I use the EXACT(not glut/sfml) opengl in my c++ program? I am so confuse....

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  • XHTML fix solution republished

    - by TATWORTH
    As a post VS2010 SP1 installation activity, I am recompiling all my open source projects. The first is XHTMLFIX at http://xhtmlfix.codeplex.com/ This LGPL project has simple fixes to ASP.NET 2.0/4.0 to achieve XHTML compliance as measured by the W3C tests at http://validator.w3.org/ The XHTML project shows as untrue the commonly held belief that MVP or MVC are necessary for producing XHTML compliant web pages. Incidentally the other supposed advantage of MVP and MVC over web forms of easier testing is also very dubious as web forms can be tested by systems such as Selenium or WaTiN. I have used NUnitASP (alas sadly discontinued) with web forms and found it be more effective than unit testing MVP. Now if you prefer the MVP and / or MVC approach over Web forms then fine, that is your preferance. Now if you can find an example where ASP.NET 4.0 Web forms properly written do not produce XHTML compliant markup, I would be glad of your example and will look at ways of modifying the markup to be XHTML compliant.

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  • Looking for the better way to combine deep architecture refactoring with feature based development

    - by voroninp
    Problem statement: Given: TFS as Source Control Heavy desktop client application with tons of legacy code with bad or almost absent architecture design. Clients constantly requiring new features with sound quality, fast delivery and constantly complaining on user unfriendly UI. Problem: Application undoubtedly requires deep refactoring. This process inevitably makes application unstable and dedicated stabilization phase is needed. We've tried: Refactoring in master with periodical merges from master (MB) to feature branch (FB). (my mistake) Result: Many unstable branches. What we are advised: Create additional branch for refactoring (RB) periodically synchronizing it with MB via merge from MB to RB. After RB is stabilized we substitute master with RB and create new branch for further refactoring. This is the plan. But here I expect the real hell of merging MB to RB after merging any FB to MB. The main advantage: Stable master most of the time. Are there any better alternatives to the procees?

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  • What to choose for beginner: PHP/Python/Ruby

    - by Nai
    I'm a beginner teaching myself to code but I would like he insight of the PSE community and helping choose where to start. My main objective is to be able to create a basic website to first test my business idea and from there iterate on it quickly to minimise my learning time. The most important criteria for me is speed. An example of speed would be pre-built components available open source and not having to write one from scratch. From my research, this seems to be a death match between the following languages and frameworks: PHP and CakePHP Python and Django Ruby and Rails Assumptions: I am going to be equally good (or bad) in all 3. It is going to be equally easy to find competent developers in either language. I know this to be false already by lets assume that it is. This question is not meant to karma whore as I've seen how passionate some of these standoff questions have been and I'll be happy to turn it into a community wiki.

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  • Go passe en version 1.0, le langage de Google est prêt pour être utilisé en production

    Google vient d'annoncer que son langage open source Go était disponible en version 1.0n ce qui marque une importante étape dans l'évolution de ce langage. Rappelons que Go est un langage compilé permettant de simplifier le développement d'applications concurrentes. Il est destiné notamment à la programmation système. Le passage de Go à version 1.0 suppose que le langage soit prêt pour être utilisé en environnement de production et que tout programme créé avec cette version puisse être compilé et exécuté sans modification de code avec les versions suivantes. Toutes les applications s'appuyant sur les versions précédentes doivent être exécutées avec un programme GoFix qui corrigera les problèmes de compatibilité. Avec cette ...

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  • Getting older packages from ppa

    - by highsciguy
    Can I install an older version of a specific package from a ppa? Specifically, I want to get an older version of xserver-xorg-video-intel (and dependencies) from xorg-edgers ppa. The reason is that the older version seemed to work with my hardware. The present version seems to feature (I would like to found out if it is really the source) severe crashes as the present stable releases of this package do. I tried apt-get install pkg=version but didn't succeed. I am afraid that the packages in the cache are lost after apt-get clean I do not even know the precise version number of the previous version, assuming that it doesn't have to be exactly one less. The current version is xserver-xorg-video-intel-2.20.15 Alternatively: Is there a place, e.g. at launchpad, where I can manually download the previous version of the package?

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  • OpenJDK 6 B26 Available

    - by user9158633
    On September 21, 2012 the source bundle for OpenJDK 6 b26 was published at http://download.java.net/openjdk/jdk6/. The main changes in b26 are the latest round of security updates and a number of other fixes. For more information see the detailed list of all the changes in OpenJDK 6 B26. Test Results: All the jdk regression tests run with  make test passed on linux. cd jdk6 make make test For the current list of excluded tests see  jdk6/jdk/test/ProblemList.txt file:  ProblemList.html in B26 |  Latest ProblemList.txt (in the tip revision). Special thanks to Kelly O'Hair for his contributions to the project and Dave Katleman for his Release Engineering work.

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  • LightScythe Creates Huge Light Paintings

    - by Jason Fitzpatrick
    Earlier this year we showed you how an LED POV staff could be used to visualize network data. This build takes it to another level and allows you to imprint entire words and images into photos. Gavin, a hardware hacker from Sydney, built an open-source POV (persistence of vision) staff after the Wi-Fi visualizer inspired him to begin playing with large POV builds. He built his POV staff using LED strips, wireless controllers, and a laptop to send the signals at the proper intervals to the staff. He can write words, create images, and even send Pac-Man racing across the frame. Hit up the link below to read more about his project and grab his schematics and parts lists. LightScythe [The Mechatronics Guy via Make] HTG Explains: Photography with Film-Based CamerasHow to Clean Your Dirty Smartphone (Without Breaking Something)What is a Histogram, and How Can I Use it to Improve My Photos?

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  • What is the formal definition of a meta package?

    - by kojiro
    There are several examples of packaging where an application package is built, named, described, even licensed, but contains only setup code and dependencies -- it has no first-class runtime software of its own. I would call this "meta-packaging". This seems to be particularly popular in the open-source world, including examples like kde-meta (Gentoo Portage), Plone, and I'm sure lots of others. I can see how it's a useful practice, but despite it existing as a practice, I couldn't find a formal definition of either "meta-packaging" or "meta-egg" (Python) in searching the web. Is that not the correct term? If it is, is it such common-sense that it needs no formal definition? If not, what is the correct way to put it?

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  • What is a light-weight "slideshow" script that could integrate w/ CMS?

    - by aslum
    I'm looking to reduce the footprint of my Strict html 4.01 front page. One possible way is to combine much of the "upcoming events" into a single small box, and have them automagically switch which one is displayed every few seconds. I'm sure there are a bunch of this kind of thing written already, and surely an open source one exists, but I haven't had much luck find one. I'd prefer javascript to jQuery as installing jQuery might not be an option, but if the best-fit script requires jQuery I'd certainly be willing to investigate that route. If it can display content from Wordpress that would be ideal.

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  • XRegExp Regular Expression Library for JavaScript

    - by Jan Goyvaerts
    XRegExp is an open source JavaScript library. It extends JavaScript’s regex syntax with features such as free-spacing, named capture, mode modifiers, and Unicode categories, blocks, and scripts. It also provides its own test(), exec(), forEach(), replace(), and split() methods that eliminate most cross-browser inconstencies and bugs. Anyone using non-trivial regexes in their JavaScript code should seriously consider using XRegExp. Last month’s update of the Regular-Expressions.info website added full coverage of XRegExp to the regex tutorial and regex reference sections. But the tools & languages section was missing the XRegExp page, resulting in broken links in the tutorial and reference sections. This page has now been added.

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  • How do I get Catalyst 11.10 with ATI Radeon Mobility HD 5470 working on an HP DV7?

    - by S Kumar
    I have a HP DV7 with a HD 5470 512M card. Installation of the Catalyst 11.10 is repeatedly failing on a fresh install of Ubuntu 11.10. Catalyst 11.8 proprietary drivers were working well with Ubuntu 11.04. I have tried installing directly from the .run and generating the distribution specific packages. Nothing has worked. After installation which goes through successfully, the system hangs on reboot after the flashing dots. I have to replace the /etc/X11/xorg.conf to get the X working. I have followed instructions as per the http://wiki.cchtml.com/index.php/Main_Page wiki. Request for support to ATI/AMD gives the response that this model is unsupported on Linux by HP :). Updated 14-Nov I have reverted back to the open source drivers which work well enough for me.

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  • Microsoft Azure Diagnostics Part 1: Introduction

    Having a well thought-out plan for diagnostic data is important for on-premises applications, but it is arguably more important for distributed, highly scalable cloud applications. Michael Collier has provided a clear introduction to Microsoft Azure Diagnostics, including the Diagnostics Agent and how to extract the data. 24% of devs don’t use database source control – make sure you aren’t one of themVersion control is standard for application code, but databases haven’t caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out…

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  • How do I install penmountlpc?

    - by ændrük
    I would like to install the penmountlpc touchscreen driver in Ubuntu 11.10 on a Dialogue Flybook A33i. When I try installing it from the source packed in penmountlpc-source_1.1_all.deb, I receive the following build error (see also the full build log): # Install the module cp penmountlpc.o debian/penmountlpc-modules-3.0.0-12-generic/lib/modules/3.0.0-12-generic/misc cp: cannot create regular file `debian/penmountlpc-modules-3.0.0-12-generic/lib/modules/3.0.0-12-generic/misc': No such file or directory make[1]: *** [binary-modules] Error 1 make[1]: Leaving directory `/usr/src/modules/penmountlpc' make: *** [kdist_build] Error 2 How can I resolve this problem?

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  • How do I interpret direct traffic that lands on random pages?

    - by mfg
    Looking at yesterday, according to Google Analytics, I got six direct visitors to my site (their source/medium is direct/(none)). Only one ended up at the actual domain. The other five ended up at miscellaneous foo.com/xyz.html. I did not send out links to people by email, and I'm not sure how likely it is the people would have copy/pasted the URLs. How do the visitors end up there? Is there a way to better capture where they might be coming from?

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