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  • Suggestions for getting an open source electron beam tracking code going

    - by Boaz
    I work in the field of accelerator physics and synchrotron radiation. High energy electrons circulating in large rings of magnets produce x-rays that are used for a variety of different kinds of science. Running and improving these facilities requires controlling and modelling the electron beam as it circulates in the ring. A code to model this basically requires trackers to follow the electrons through the elements (something called a symplectic integrator), and then the computation of different parameters associated with this motion. The problem with these codes is that every facility has there own. In principle the code is not so complex. And as a modelling project, one might think it has some general interest. Who doesn't want to be able to create a track in space out of magnets and watch the electrons circulate? There is a Matlab based code to do this called Accelerator Toolbox, but the creator of the code is no longer in the field. I put the code in Sourceforge under the name atcollab. The basic resource is in C- it is the set of symplectic integrators. These are available in the atcollab code here. It has been useful to put the code on Sourceforge in order to exchange code, but the community of users is quite small and most are too busy to put that much time into collaboration. So in terms of really improving the code, I don't think it has been so successful. Any piece of this picture could be recreated without that much difficulty, but overall it is a bit complex, and because each lab has their own installation with lots of add-on Matlab code, people find it hard to really work together and share code. Somehow I think we need to involve a wider community in our development, or just use some standard tools. But for that, I suppose it needs to be of some general interest. I think symplectic integrators may have some general interest. And the part about a plug-in architecture to build up the ring ought to fit other patterns. Or the other option is to just accept that this is not a problem of general interest, and work harder within our small community. Suggestions, or anecdotes of analogous experience would be appreciated.

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  • Open Source Errors on Apple Cruch

    - by BluFire
    I've been looking around and I finally got the full source code called Apple-Crunch from google code. But when I put it into my project, the source code included so many errors in the class files such as: cannot be resolved into a type the constructor is undefined the method method() is undefined for the type Sprite class.java I downloaded the source directly from the command-line and noticed errors popping up on my project. Since i couldn't figure out how to import the actual folder into my workspace(it wouldn't show up on existing projects) I decided to copy and overwrite the folders into the project. The Errors were still there so I looked at the class files and noticed that the classes with errors extended from 'RokonActivity'. I then proceeded to add to the libs folder the rokon library in hopes to fix the errors. Sadly it didn't work and now I don't what to do to fix the errors. How do i fix the errors without having to manually change the code? The source code should be fully functional so why is there errors?

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  • Google Open-Sources Their Book Scanner

    - by Jason Fitzpatrick
    Google has released the hardware and software source for their high speed/non-destructive book scanner–If you’re looking to scan a large volume of books, save yourself the design work and check out the Linear Book Scanner project. The design is pretty slick; the scanner uses vacuum pressure to automatically turn the pages as it works. Check out the video above to see a Google Tech Talk about the project and then hit up the link below to grab the hardware and software files. Linear Book Scanner [via Hack A Day] Why Does 64-Bit Windows Need a Separate “Program Files (x86)” Folder? Why Your Android Phone Isn’t Getting Operating System Updates and What You Can Do About It How To Delete, Move, or Rename Locked Files in Windows

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  • How Have You Implemented Open Source Contributions At Your Company?

    - by Travis
    Ok guys, I know others have asked this question in a similar manner in the past, but I want to go beyond the theoretical and find out answers from people who have worked in an environment that relied heavily upon open source technology and never contributed anything back to the open source community, and was able to convince the boss / owner to contribute back to the open source community. I know alot of the standard answers, but I'm looking for some more practical information? What was the key argument, that changed the culture in your company, and how has it changed?

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  • Do support sites like stackoverflow upset the paid-support open source model?

    - by ajax81
    In order to stay relevant in the marketplace, I'm researching new business models for my software company. The open source model with paid support seems like a good fit for our product, but I have concerns about whether or not a paid support model is viable in an era where top-notch help is readily available for free on sites like those in the StackExchange network. Case in point -- I moved my employees to Ubuntu last year because I didn't want to pay for Win 7 licenses and new hardware (plus, the mono platform was highly attractive). My staff had no Linux experience, but were able to achieve relative competency in about 120 days with the help of AskUbuntu, StackOverflow, and a few "For Dummies" books. We did employ an Ubuntu consultant for 7 days to provide training and support, but beyond that spent $0.00 on any kind of paid expertise. In regards to my due diligence, I ran a 3 month beta of the freemium-paid-support model with one of our smaller customers, and achieved mediocre results. I'd like to think its because our software is so stable and easy to use that the customer didn't need much paid support, but I suspect that they circumvented the terms of our SLA in the same manner that we did with the move to Ubuntu. Does anyone out there has any thoughts, advice, or experience relevant to the move I'm considering? What worked, what didn't, etc? Thanks in advance!

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  • As a young student aspiring to have a career as a programmer, how should I feel about open source software?

    - by Matt
    Every once in a while on some technology websites a headline like this will pop up: http://www.osor.eu/news/nl-moving-to-open-source-would-save-government-one-to-four-billion My initial thought about government and organizations moving to open source software is that tons of programmers would lose their jobs and the industry would shrink. At the same time the proliferation and use of open source software seems to be greatly encouraged in many programming communities. Is my thinking that the full embrace of open source software everywhere will hurt the software industry a misconception? If it is not, then why do so many programmers love open source software?

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  • What is the difference between industrial development and open source development?

    - by Ida
    Intuitively, I think open source development should be much more "casual" than industrial development process (like in Microsoft). Because for OSS development: Duty separation is not that strict than in big companies (maybe developers == testers in open source development?) People come in and out of the open source community, much more frequently than in big companies However, above are just my guesses. I really want to know more about the major difference between the open source and industrial development. Is their division of duty totally different (e.g., is there a leader/manager-like role in open source development?)? Maybe it is their communication style that differs a lot? Or their workflow? Please share your opinions. Thanks a lot!

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  • What made you contribute to that open source project? [closed]

    - by Ermin
    I'm interested in real experience and personal answers not just those standard worn out "benefits of contributing to open source" that we all memorized by heart by now. I've met many people who contribute to open source project and almost never did this topic come up: why did they contribute to this open source project. So, if you've contributed to an open source project before in any way, can you please pause for a second and try to remember what really made you decide to contribute to that particular project. Was it a random decision, was it because you were bored, was it because the company you worked for was already using it and you contributed as part of your job, was it because the project was too big you wanted to get contracts, or the project was too small you wanted to build it, or because your prof or co-worker asked you to help with his open source project, or..... To substantiate your reasons, please mention the project name and rate your involvement (heavy, occasional, light, once).

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  • How should I contribute to an open source project?

    - by Rajan Walia
    I know basic C++ like about classes and other basic stuff what are the things which i need to know so that i can understand the source code of some advance open source projects and be able to make one too. Like if i read the code of vlc or some other projects I can't understand many things moreover i am just a beginner have not worked on even multi file programs so please suggest which are the books and what are the basic projects from where i can start.

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  • Android “open for embedded”? Must-read Ars Technica article

    - by terrencebarr
    A few days ago ars technica published an article “Google’s iron grip on Android: Controlling open source by any means necessary”. If you are considering Android for embedded this article is a must-read to understand the severe ramifications of Google’s tight (and tightening) control on the Android technology and ecosystem. Some quotes from the ars technica article: “Android is open – except for all the good parts“ “Android actually falls into two categories: the open parts from the Android Open Source Project (AOSP) … and the closed source parts, which are all the Google-branded apps” “Android open source apps … turn into abandonware by moving all continuing development to a closed source model.” “Joining the OHA requires a company to sign its life away and promise to not build a device that runs a competing Android fork.” “Google Play Services is a closed source app owned by Google … to turn the “Android App Ecosystem” into the “Google Play Ecosystem” “You’re allowed to contribute to Android and allowed to use it for little hobbies, but in nearly every area, the deck is stacked against anyone trying to use Android without Google’s blessing“ Compare this with a recent Wired article “Oracle Makes Java More Relevant Than Ever”: “Oracle has actually opened up Java even more — getting rid of some of the closed-door machinations that used to be part of the Java standards-making process. Java has been raked over the coals for security problems over the past few years, but Oracle has kept regular updates coming. And it’s working on a major upgrade to Java, due early next year.” Cheers, – Terrence Filed under: Embedded, Mobile & Embedded Tagged: Android, embedded, Java Embedded, Open Source

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  • What is the economic rationale behind programmers who work on a open source project (free) instead of a commercial project (not free)?

    - by Kim Jong Woo
    I can't understand why some people dedicate so much hour into a completely open source project without closing it and yielding greater profit from it. I don't think profiting from your code is evil, I think it's a great motivator. Why do some people feel that commercial software and generating money from it is bad? There seems to be this black and white thinking that open source = good, commercial = bad. I hardly find this convincing, and often commercial companies which are supported by sales produce very good results. An open source software in the same niche can't compete against the corporation. Of course, sometimes this is completely the other way around where private companies produce inferior product compared to open source counterparts. So help me understand, why do programmers open source their code when there is commercial prospects for it? Shouldn't the rational programmer or human being make every effort to capitalize on their opportunity cost? Working on a open source project for months when you could've spent the same number of hours at commidity wage or some other monetary compensation?

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  • When is the right time to join open source project for programmer?

    - by Mahesh
    Most of the newcomers in programming start with basic projects to start with programming. Most of the C++ progammers spend some time with puzzles and contests but this is not always helpful. Sometimes you've to spend some time on real projects. Starting your own open source project could be a problem in self-learning for newbie cause of lack of mentors and peers who can't look at your code and give suggestions. Open source projects can solve this problem, some projects could be best suited for new programmers. Besides everybody is newbie at some point. So i'll try and make this question a bit from beginners perspective. I tried few questions on stack overflow before asking this like How do i join & Bare minimum you need and how to get involved with open source and what level of programming etc. But this is not helping me when it comes to self-evaluating with skills. How to find that out ? How can i check what it takes to join open source project and am i really that comfortable with huge source code etc. My question is when to consider yourself comfortable joining open source programming ? I mean how will you test yourself that you're ready to take burden of big/small projects of open source ? how will you test yourself to see if you could work with version control/other programmers/tight schedule etc ?

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  • When to open source a project under development? [closed]

    - by QuasarDonkey
    Possible Duplicate: Is it OK to push my code to GitHub while it is still in early development? I've been working on a hobby project for a few months now; it's clocking in at over 15000 source lines of code. A number of people have expressed interest in joining development, and I have full intentions of going open source, since it would not be feasible for me to complete the project alone. I'm just not sure when to open-source it. For context, I've notice many successful open source projects, such as the Linux kernel, had considerable work done before they were open-sourced. In my case, I'd been planning on open-sourcing it after I complete all the underlying libraries and overall architecture. Is this a mistake; should I just release it right now? I'm worried that since certain critical underlying components haven't been finalized, if people build a large codebase around them, it will be very difficult to change or fix things later. On the other hand, it's a very large project that will require multiple developers to complete in a reasonable time. So when is the right time during development to go open source? Preferably, I'd like to hear from some folks who have started their own projects.

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  • Does likewise-open > version 5.4 contain CIFS support?

    - by Ben Andken
    I'm trying to get the CIFS server working in likewise-open. I've found this set of instructions and everything seems to work until I try to connect ([url]http://www.likewise.com/resources/documentation_library/manuals/cifs/likewise-cifs-smb-file-server-guide.html#id2765992):[/url] 1.6. Build and Configure a Standalone Likewise-CIFS Server This section demonstrates how to build and configure a standalone instance of Likewise-CIFS from the command line. The following procedure assumes that you want to set up Likewise-CIFS on a Linux server to share files with Windows computers in a network without Active Directory. This procedure also assumes you know how to build Linux applications from their source code and then install them. Download Likewise-CIFS from its open source git location: $ git clone git://git.likewiseopen.org/ Download, build, and install the following tools. The tools listed are known to work, but earlier or later versions might work as well. Also, instead of downloading the tools, you might be able to install them on your platform with apt-get or some other means. http://ftp.gnu.org/gnu/autoconf/autoconf-2.65.tar.gz http://ftp.gnu.org/gnu/automake/automake-1.9.6.tar.gz http://ftp.gnu.org/gnu/libtool/libtool-2.2.6a.tar.gz http://pkgconfig.freedesktop.org/releases/pkg-config-0.23.tar.gz gcc --version 3.x or greater Build Likewise-CIFS: $ cd likewise-open $ build/mkcomp --debug all Install Likewise-CIFS: $ sudo su $ cd staging/install-root $ tar cf - . | (cd / && tar xvf -) Make sure Samba is not running: $ /etc/init.d/smb stop Make sure SELinux is either disabled or set to permissive. Make sure the ports required by Likewise are open. For a list of ports that Likewise uses, see the Likewise Open Installation and Administration Guide. Configure Likewise Open: $ /etc/init.d/lwsmd start $ for i in /etc/likewise/*.reg; do /opt/likewise/bin/lwregshell upgrade $i; done $ /etc/init.d/lwsmd stop $ /etc/init.d/lwsmd start $ /opt/likewise/bin/lwsm start srvsvc $ /opt/likewise/bin/domainjoin-cli configure --enable nsswitch Add a user account to the local Likewise provider database. In the following example, substitute the account name that you want for newuser. $ /opt/likewise/bin/lw-add-user --home /home/newuser --shell /bin/bash newuser Successfully added user newuser Enable the user and set the password: $ /opt/likewise/bin/lw-mod-user --enable-user --set-password newuser New Password: ********** Successfully modified user newuser Look up new user's identity as follows. Substitute the value from the command hostname -s for the hostname. Keep in mind that Likewise truncates a hostname longer than 15 characters to the first 15 characters of the string. % id hostname\\newuser uid=2000(HOSTNAME\newuser) gid=1800(HOSTNAME\Likewise Users) groups=1800(HOSTNAME\Likewise Users) context=system_u:system_r:unconfined_t:s0 Make a CIFS directory for the user: mkdir /lwcifs/newuser chown 2000:1800 /lwcifs/newuser From a Windows computer, map the Likewise-CIFS drive share: Computer->Map Network Drive... Folder: \\IP_hostname\c$ Click "Finish" Username: hostname\newuser Password: user_password The last step fails when I try to connect. I've tried with Windows XP Pro and Windows 7 Pro. The rest of the directions only appear to work for version 5.4 (the one that shipped with 10.04). For 12.04, version 6.1 is the only one available and it doesn't appear to have the srvsvc module mentioned in these instructions. Is CIFS support dropped in the 6.1 version of likewise-open?

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  • Centos running Apache Tomcat keep getting "java.net.SocketException: Too many open files"

    - by Gerard Moroney
    We're running Apache Tomcat 7.0.41 on CentOS 6 with java version "1.7.0_21". We were getting a lot of too many open files errors so I did some research. The consensus was that it was to to with the number of open files. So I did the following: Increased max files in /etc/security/limits.conf soft nofile 100000 hard nofile 100000 Rebooted the server Checked the limits were valid for the user which was to run the process [app_admin@xxx ~]$ ulimit -Hn 100000 [app_admin@xxx ~]$ ulimit -Sn 100000 Monitored open files on the server using the lsof command What I observed was when the total open files reached circa 13000 and tomcat had around 4500 open files the error reappeared. I am confused. I thought it would have resolved the problem but clearly I don't fully understand the root cause and also how to set the parameter correctly. To (maybe) help I have not modified the server.xml file for Tomcat (although I'm tempted). I don't want to start fiddling with that and make things worse. I'm more than happy to share any more information if someone can give me some hints on where to start looking.

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  • Clearos open vpn vs windows open vpn client where client connects with no default gateway

    - by Paul
    Am using clearos as open vpn server and configured my users on windows machine with open vpn client. My problem is that users connect to the server without a default gateway and also with ip conflicts, i can ping the server but i can not ping any user behind the server. please any one can help to find out what causes the clients to connect without a default gateway and also not to be able to ping any user behind the clearos open vpn server. Help with a step by step guide of installing open vpn on clearos and open vpn clients on windows. Thanks

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  • Dilemma for growing a project: Open source volunteer developers VS closed source paid / revshare developers? [closed]

    - by giorgio79
    I am trying to grow my project, and I am vaccillating between some examples. Some options seem to be: 1. open sourcing the project to draw volunteer developers. Pros This would mean anyone can try and make some money off the code that would motivate them to contribute back and grow the project. Cons Existing bigger could easily copy and paste my work so far. They can also replicate without having access to the code, but that would take more time. I also thought of using AGPL license, but again, code can still be copied without redistribution. After all, enforcing a license costs a lot of money, and I cannot just say to a possible copycat that it seems you copied my code, show me what you got. 2. Keep the project closed source, but create some kind of a developer program where they get revshare Pros I keep the main rights for the project, but still generate interest by creating a developer program. Noone can copy code easily, just with some considerable effort, but make contributions easy as a breeze. I am also seeing many companies just open source a part of their projects, like Acquia does not open source its multisite setup, or github does not open source some of its core business. Cons Less attention from open source committed devs. Conclusion So option 2 seems the most secure, but would love some feedback.

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  • What are some examples of open source software that has turned into closed source software? [on hold]

    - by Verrier
    As the title says... can anyone think of any software that has made the transition from open source to closed source / proprietary? These could include software owned by the same company who decided to take a once open source offering and turn it into closed source... but I'm really looking for some examples of companies who developed a commercial closed source product off of an existing open source one (obviously with a permissive license).

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  • How to set which application is launched by xdg-open?

    - by Dima
    I have run update-alternatives as well as gnome preffered apps selection thing. And all point to have chromium browser as default. Yet when I run xdg-open http://askubuntu.com firefox is launched! Similarly emacs and bzr also launch stuff in firefox instead of chromium. Are there any additional settings which affect xdg-open functionality? Something is definatly broken: UPDATE I have purged firefox: update-alternatives - uses chromium browser sensible-browser - opens chromium browser xdg-open & gnome-open - opens using google-chrome which kindly tells me "it's not default browser" !!!!

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  • Open source adventures with... wait for it... Microsoft

    - by Jeff
    Last week, Microsoft announced that it was going to open source the rest of the ASP.NET MVC Web stack. The core MVC framework has been open source for a long time now, but the other pieces around it are also now out in the wild. Not only that, but it's not what I call "big bang" open source, where you release the source with each version. No, they're actually committing in real time to a public repository. They're also taking contributions where it makes sense. If that weren't exciting enough, CodePlex, which used to be a part of the team I was on, has been re-org'd to a different part of the company where it is getting the love and attention (and apparently money) that it deserves. For a period of several months, I lobbied to get a PM gig with that product, but got nowhere. A year and a half later, I'm happy to see it finally treated right. In any case, I found a bug in Razor, the rendering engine, before the beta came out. I informally sent the bug info to some people, but it wasn't fixed for the beta. Now, with the project being developed in the open, I was able to submit the issue, and went back and forth with the developer who wrote the code (I met him once at a meet up in Bellevue, I think), and he committed a fix. I tried it a day later, and the bug was gone. There's a lot to learn from all of this. That open source software is surprisingly efficient and often of high quality is one part of it. For me the win is that it demonstrates how open and collaborative processes, as light as possible, lead to better software. In other words, even if this were a project being developed internally, at a bank or something, getting stakeholders involved early and giving people the ability to respond leads to awesomeness. While there is always a place for big thinking, experience has shown time and time again that trying to figure everything out up front takes too long, and rarely meets expectations. This is a lesson that probably half of Microsoft has yet to learn, including the team I was on before I split. It's the reason that team still hasn't shipped anything to general availability. But I've seen what an open and iterative development style can do for teams, at Microsoft and other places that I've worked. When you can have a conversation with people, and take ideas and turn them into code quickly, you're winning. So why don't people like winning? I think there are a lot of reasons, and they can generally be categorized into fear, skepticism and bad experiences. I can't give the Web stack teams enough credit. Not only did they dream big, but they changed a culture that often seems immovable and hopelessly stuck. This is a very public example of this culture change, but it's starting to happen at every scale in Microsoft. It's really interesting to see in a company that has been written off as dead the last decade.

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