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• Wireless not working, no driver showing in the Additional Drivers window

  - by edit lopez

  I am a new user of Ubuntu. I have a Asus Q501L laptop that came preinstalled with Windows 8, but I wanted to move from Windows and try something new, so I just decided to install Ubuntu without thinking to much about it. The problem I have is that I can't install the additional drivers. When I go to to Additional Drivers nothing appears, it just says: no proprietary drivers are in use and in small letters continues: a proprietary driver has private code that Ubuntu developers can't review and improve. security and others updates are dependent on drivers vendor.. I can't even use the wireless connection. I really don't know what to do. I tried to download the drivers from Asus, but when I tried to install them it said: an error occurred while loading the archive. Also I don't know the model of the PC wireless card. If there is something I can do to find out that please tell me. Thanks!

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• MySQL vs. SQL Server Go daddy, What is the difference bewteen hosted DB and App_Data Db

  - by Nate Gates

  I'm using Goddady for site hosting, and I'm currently using MySQL, because there are less limits on size,etc. My question is what is the difference between using a hosted Godaddy Db such as MySQL vs. creating a SQL Serverdatabase in the the App_Data folder? My guess is security? Would it be a bad idea to use a SQL ServerDB thats located in the App_Data folder? Additional Well I am able to create a .mdf (SQL Server DB file) in the App_Data folder, but I'm really unsure if should use that or not, If I did use it it would simplify using some of the Microsoft tools. Like I said my guess is that it would be less secure, but I don't really know. I know I have a 10gb, file system limit, so I'm assuming my db would have to share that space.

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• Finding the Twins when Implementing Catmull-Clark subdivision using Half-Edge mesh [migrated]

  - by Ailurus

  Note: The description became a little longer than expected. Do you know a readable implementation of this algorithm using this mesh? Please let me know! I'm trying to implement Catmull-Clark subdivision using Matlab (because later on the results have to be compared with some other stuff already implemented in Matlab). First try was with a Vertex-Face mesh, the algorithm works but it is of course not very efficient (since you need neighbouring information for edges and faces). Therefore, I'm now using a Half-Edge mesh (info), see also the paper of Lutz Kettner. Wikipedia link to the idea behind Catmull-Clark SDV: Wiki. My problem lies in finding the Twin HalfEdges, I'm just not sure how to do this. Below I'm describing my thoughts on the implementation, trying to keep it concise. Half-Edge mesh (using indices to Vertices/HalfEdges/Faces): Vertex (x,y,z,Outgoing_HalfEdge) HalfEdge (HeadVertex (or TailVertex, which one should I use), Next, Face, Twin). Face (HalfEdge) To keep it simple for now, assume that every face is a quadrilateral. The actual mesh is a list of Vertices, HalfEdges and Faces. The new mesh will consist of NewVertices, NewHalfEdges and NewFaces, like this (note: Number_... is the number of ...): NumberNewVertices: Number_Faces + Number_HalfEdges/2 + Number_Vertices NumberNewHalfEdges: 4 * 4 * NumberFaces NumberNewfaces: 4 * NumberFaces Catmull-Clark: Find the FacePoint (centroid) of each Face: --> Just average the x,y,z values of the vertices, save as a NewVertex. Find the EdgePoint of each HalfEdge: --> To prevent duplicates (each HalfEdge has a Twin which would result in the same HalfEdge) --> Only calculate EdgePoints of the HalfEdge which has the lowest index of the Pair. Update old Vertices Ok, now all the new Vertices are calculated (however, their Outgoing_HalfEdge is still unknown). Next step to save the new HalfEdges and Faces. This is the part causing me problems! Loop through each old Face, there are 4 new Faces to be created (because of the quadrilateral assumption) First create the 4 new HalfEdges per New Face, starting at the FacePoint to the Edgepoint Next a new HalfEdge from the EdgePoint to an Updated Vertex Another new one from the Updated Vertex to the next EdgePoint Finally the fourth new HalfEdge from the EdgePoint back to the FacePoint. The HeadVertex of each new HalfEdge is known, the Next HalfEdge too. The Face is also known (since it is the new face you're creating!). Only the Twin HalfEdge is unknown, how should I know this? By the way, while looping through the Vertices of the new Face, assign the Outgoing_HalfEdge to the Vertices. This is probably the place to find out which HalfEdge is the Twin. Finally, after the 4 new HalfEdges are created, save the Face with the HalfVertex index the last newly created HalfVertex. I hope this is clear, if needed I can post my (obviously not-yet-finished) Matlab code.

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• Weird font hinting in Firefox 4

  - by sexyprout

  Hi everyone. I know this a recurrent topic but I just can't find a decent solution--although I found one for Chrome. Just take look at the following screenshots: Chrome 9 Firefox 4 See the slight difference? I can't identify the exact difference but I can tell fonts in Chrome look smoother. Here are my system preferences (prefer to show a screenshot as I don't know the exact translations in English): Anyone got a solution? Thanks. Update: from my point of view, it doesn't seem to actually be a hinting problem. I'd say Firefox uses subpixel rendering instead of grayscale rendering. (yet I can't find the setting in fontconfig) But this is a subjective opinion, can you confirm?

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• need some concrete examples on user stories, tasks and how they relate to functional and technical specifications

  - by gideon

  Little heads up, Im the only lonely dev building/planning/mocking my project as I go. Ive come up with a preview release that does only the core aspects of the system, with good business value and I've coded most of the UI as dirty throw-able mockups over nicely abstracted and very minimal base code. In the end I know quite well what my clients want on the whole. I can't take agile-ish cowboying anymore because Im completely dis-organized and have no paper plan and since my clients are happy, things are getting more complex with more features and ideas. So I started using and learning Agile & Scrum Here are my problems: I know what a functional spec is.(sample): Do all user stories and/or scenarios become part of the functional spec? I know what user stories and tasks are. Are these kinda user stories? I dont see any Business Value reason added to them. I made a mind map using freemind, I had problems like this: Actor : Finance Manager Can Add a Financial Plan into the system because well thats the point of it? What Business Value reason do I add for things like this? Example : A user needs to be able to add a blog article (in the blogger app) because..?? Its the point of a blogger app, it centers around that feature? How do I go into the finer details and system definitions: Actor: Finance Manager Action: Adds a finance plan. This adding is a complicated process with lots of steps. What User Story will describe what a finance plan in the system is ?? I can add it into the functional spec under definitions explaining what a finance plan is and how one needs to add it into the system, but how do I get to the backlog planning from there? Example: A Blog Article is mostly a textual document that can be written in rich text in the system. To add a blog article one must...... But how do you create backlog list/features out of this? Where are the user stories for what a blog article is and how one adds/removes it? Finally, I'm a little confused about the relations between functional specs and user stories. Will my spec contain user stories in them with UI mockups? Now will these user stories then branch out tasks which will make up something like a technical specification? Example : EditorUser Can add a blog article. Use XML to store blog article. Add a form to add blog. Add Windows Live Writer Support. That would be agile tasks but would that also be part of/or form the technical specs? Some concrete examples/answers of my questions would be nice!!

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• Figuring a max repetitive sub-tree in an object tree

  - by bonomo

  I am trying to solve a problem of finding a max repetitive sub-tree in an object tree. By the object tree I mean a tree where each leaf and node has a name. Each leaf has a type and a value of that type associated with that leaf. Each node has a set of leaves / nodes in certain order. Given an object tree that - we know - has a repetitive sub-tree in it. By repetitive I mean 2 or more sub-trees that are similar in everything (names/types/order of sub-elements) but the values of leaves. No nodes/leaves can be shared between sub-trees. Problem is to identify these sub-trees of the max height. I know that the exhaustive search can do the trick. I am rather looking for more efficient approach.

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• Package information was last updated 59 days ago even though Ubuntu is up to date

  - by Luuz

  I'm using ubuntu 11.10 and in the update manager I have a message that says package information last updated 59 days ago press the check button to check for software updates I do that, but i'm up to date. I checked other threads with this same problem, and saw i should do sudo apt-get update in a terminal to see which repository is not up to date and when I did, I got this message: Failed to fetch http://extras.ubuntu.com/ubuntu/dists/oneiric/Release Then I checked for this repository in software sources but couldn't find this specific one. In my /etc/apt/sources.list.d I have only one line: deb http://archive.canonical.com/ubuntu oneiric partner #Added by software-center So now I don't know what to do more. Should I upgrade to 12.04 and will it solve my problem? I wouldn't want to upgrade if there is a problem in the last version but I don't know much about Ubuntu so, can anyone help me please? Thank you!!

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• Improving without mentor

  - by speeder

  Although I consider myself not much experienced, I keep landing in jobs as the leader somehow (in the current one I am tech director of the company, in a previous one I was the R&D head). I understand why this happen (I have a certain specific set of skills, and I use some uncommon programming languages), my issue is: I cannot find a mentor... I know there must be stuff to me learn, and I notice as I work over the years that I am slowly learning more and more, but I believe that there are some way to get better much faster than just coding... So, how I improve when there are no other person in the company to teach me, or to me read their code? (or fix their code even...) I think I am beyond books, but way below a "master" level, so I don't know where to learn more.

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• How do I learn Python from zero to web development? [closed]

  - by Terence Ponce

  I am looking into learning Python for web development. Assuming I already have some basic web development experience with Java (JSP/Servlets), I'm already familiar with web design (HTML, CSS, JS), basic programming concepts and that I am completely new to Python, how do I go about learning Python in a structured manner that will eventually lead me to web development with Python and Django? I'm not in a hurry to make web applications in Python so I really want to learn it thoroughly so as not to leave any gaps in my knowledge of the technologies involving web development in Python. Are there any books, resource or techniques to help me in my endeavor? In what order should I do/read them? UPDATE: When I say learning in a structured manner, I mean starting out from the basics then learning the advanced stuff without leaving some of the important details/features that Python has to offer. I want to know how to apply the things that I already know in programming to Python.

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• Help making TP-Link Wireless USB Adapter TL-WN723N work consistently

  - by Savvas Katseas

  I've only recently made the jump to Ubuntu, using 11.10/64 as my only desktop OS. Everything seems to be working fine, except my USB Wireless adapter, TP-Link's TL-WN723N which is randomly connecting and disconnecting. The connection time appears to be random, too: I've experienced hours of connectivity and lots of connections/disconnections. I've tried searching for a solution, but what I find doesn't concern this specific USB adapter. I'd like some help identifying the problem... I've also recently switched to using a D-Link router as a wireless hub, which creates its own wireless/n network. Unfortunately this didn't solve my problems, as the new n network can be joined, but there's no connectivity to the internet. I know that's not much info to help others solve my problem, so please let me know of what else I can provide to make this a better question -- and possibly help others facing similar trouble. lsusb reports that I'm using Realtek Semiconductor Corp. RTL8188SU 802.11n WLAN Adapter

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• Raycasting mouse coordinates to rotated object?

  - by SPL

  I am trying to cast a ray from my mouse to a plane at a specified position with a known width and length and height. I know that you can use the NDC (Normalized Device Coordinates) to cast ray but I don't know how can I detect if the ray actually hit the plane and when it did. The plane is translated -100 on the Y and rotated 60 on the X then translated again -100. Can anyone please give me a good tutorial on this? For a complete noob! I am almost new to matrix and vector transformations.

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• Is functional programming a superset of object oriented?

  - by Jimmy Hoffa

  The more functional programming I do, the more I feel like it adds an extra layer of abstraction that seems like how an onion's layer is- all encompassing of the previous layers. I don't know if this is true so going off the OOP principles I've worked with for years, can anyone explain how functional does or doesn't accurately depict any of them: Encapsulation, Abstraction, Inheritance, Polymorphism I think we can all say, yes it has encapsulation via tuples, or do tuples count technically as fact of "functional programming" or are they just a utility of the language? I know Haskell can meet the "interfaces" requirement, but again not certain if it's method is a fact of functional? I'm guessing that the fact that functors have a mathematical basis you could say those are a definite built in expectation of functional, perhaps? Please, detail how you think functional does or does not fulfill the 4 principles of OOP.

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• Game programming in C++ [closed]

  - by Asaf

  I am a new programmer. I know C++ quite well and I know C# very good. I'm really eager to learn how to program games well and I cant really find where to start learning from. I have never developed any graphics in C++ , only a crappy game with windows forms graphics. I'm really into game programming and hoping I can get employed in it in the future. I'd be glad to have some advice about this. Thanks in advance, Asaf

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• Restoring Databases

  - by Grant Fritchey

  I like the way Mike Walsh phrased it: You're Only As Good as Your Ability To Restore. Ain't it the truth. You may be taking backups, incrementals, and log backups of your databases. You may have DBCC in place, and all that fun stuff. But if you haven't restored the database, what do you have? You don't know. The trick is, restoring databases takes up a heck of a lot of space on your servers. To test all your productions backups, you'd need a system with as much space as production. unless.. Ever heard of SQL Virtual Restore? Check it out. With this, you answer Mike's questions and validate your backups without having to have twice the amount of space. That's a win, and we all know, winning is better than losing.

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• Learning the command line [duplicate]

  - by Billy

  This question already has an answer here: What is the best way to learn how to use Ubuntu with terminal? 3 answers This isn't really a technical question but I am curious as to how long it takes to learn the linux command line. I would like to learn how to be able to do as much as possible easily from the command line. I just bought a book, linux command line and shell scripting bible. I know that this book will be of great help, but i just have no clue how long it will be before i can successfully naviagte the terminal with ease. If you could post and let me know about your experience with the terminal, and the learning process, that would be greatly appreciated. Thank you in advance.

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• Are there any resources on how to identify problems that could best be solved with templates?

  - by sap

  I decided to improve my knowledge in template meta-programming. I know the syntax and rules and been playing with counteless examples from online resources. I understand how powerful templates can be and how much compile time optimization they can provide but I still cant "think in templates", I can't seem to know by myself if a certain problem could be best solved with templates and if it can, how to adapt that problem to templates. Is there some kind of online resource or book that teaches how to identify problems that could best be solved with templates and how to adapt that problem?

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• How a "Collision System" should be implemented?

  - by nathan

  My game is written using a entity system approach using Artemis Framework. Right know my collision detection is called from the Movement System but i'm wondering if it's a proper way to do collision detection using such an approach. Right know i'm thinking of a new system dedicated to collision detection that would proceed all the solid entities to check if they are in collision with another one. I'm wondering if it's a correct way to handle collision detection with an entity system approach? Also, how should i implement this collision system? I though of an IntervalEntitySystem that would check every 200ms (this value is chosen regarding the Artemis documentation) if some entities are colliding. protected void processEntities(ImmutableBag<Entity> ib) { for (int i = 0; i < ib.size(); i++) { Entity e = ib.get(i); //check of collision with other entities here } }

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• Blank Screen After Ubuntu 12 installation

  - by Atul

  On my dell laptop, running with windows 7, I installed Ubuntu 12. I used it for sometime, then i re-started to switch to windows. First time it got boot up with windows but then it got hanged. I re-started again and then blank screen with blinking cursor came and beep sounds also started to came. I read in few forums and this seems like a common issue with Ubuntu. I tried using the bootable USB for both windows 7 and Ubuntu but none of these are even getting detected. Please let me know if any of know the work-around. Below is configuration" Machine: Dell Studio BIOS: Phoenix OS: Windows 7 Motherboard: Intel

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• What is needed for a networked home printer?

  - by Jay

  I've seen this question: Home network printer recommendations but I think I'm asking something more basic. I'm not really familiar with networked printers or how they work or what they do really. What I'd like is to have a printer that is accessible to anyone connected to my home network, without having to plug into the printer itself. An alternative setup might to be to have a printer that is always hooked up to one computer, like a desktop, that is almost always on and allows other computers connected on the network to print to it as well. I believe the first option is called a networked printer and the second is printer sharing. But again I'm new to this so I don't really know the details or if I'm using the correct terminology. I was wondering if someone might be able to shed some light on this and let me know what is needed for either of these setup. Thanks.

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• How to enable true remote login

  - by Scán

  I don't quite know how these things are called, so a search did not product any help. I've got two computers, a desktop and a netbook. The netbook is really weak, and there's hardly any fun doing work with it, especially after ubuntu software swallows so much cpu power for nothing. But my desktop is good, but uncomfortably positioned. So I know you can use any linux system as a server to give logins. I want to be able to login and work on my desktop, from my netbook. No VNC, no SSH, full X-server, I want to be able to choose "Login on Desktop" in my login menu on the netbook and have everything as if I was there. I hope I could make my point. Is it possible in a local network? And if so, how can I easily set it up?

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• Name of web design technique with vertically contiguous but separate screen-sized blocks?

  - by Chad Schultz

  I don't know the proper name for this, which makes it hard to Google it or describe this. On a site like http://p2theme.com/ as you scroll down you see that content is arranged into screen-sized chunks, each with its own chunk of content, each with a different background color, making them visually distinctive. I've seen this used more and more frequently on websites, but don't know what it's called. People have tried telling me "responsive design" or "flat UI" or "infinite scroll" or "parallax" -- but those are completely different things. What do you call this technique?

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• How to install Visual Python?

  - by user214152

  I'm a Linux newbie but I'm determined to get my favorite applications on my laptop running Ubuntu 12.04. I just installed Cinnamon. I'm trying to install Visual Python and it requires Python 2.7. I followed the instructions on the VPython site but the Wine application isn't extracting anything from the Python .msi file. From the first line wine start /i python-2.7.5.amd64.msi /qn TARGETDIR=~/Python27 ALLUSERS=1 it says fixme:storage:create_storagefile Storage share mode not implemented. I created that Python27 directory so I know it exists and it's empty. I know Ubuntu already has Python 2.7 so I just tried running the VPython.exe file but it says "This program can only be installed on versions of Windows designed for the following processor architectures: x64." My Toshiba satellite has a 64-bit processor. Could anybody help?

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• Error message during update from 13.04 to 13.10

  - by layonhands

  The following was reported after I attempted to report the problem back to Ubuntu: The problem cannot be reported: You have some obsolete package versions installed. Please upgrade the following packages and check if the problem still occurs: ubuntu-release-upgrader-gtk, apport, apport-gtk, apport-symptoms, apt, apt-utils, at-spi2-core, binutils, dbus, gcc-4.7-base, gdb, gir1.2-atk-1.0, gir1.2-gtk-3.0, glib-networking, glib-networking-common, glib-networking-services, gnupg, gpgv, ifupdown, initramfs-tools, initramfs-tools-bin, kmod, libappindicator3-1, libapt-inst1.5, libapt-pkg4.12, libasound2, libatk-bridge2.0-0, libatk1.0-0, libatk1.0-data, libatspi2.0-0, libc-bin, libc6, libcups2, libdbus-1-3, libdbusmenu-glib4, libdbusmenu-gtk3-4, libdrm-intel1, libdrm-nouveau2, libdrm-radeon1, libdrm2, libgail-3-0, libgcc1, libgcrypt11, libglib2.0-0, libglib2.0-data, libgnutls26, libgomp1, libgstreamer-plugins-base1.0-0, libgstreamer1.0-0, libgtk-3-0, libgtk-3-bin, libgtk-3-common, libgudev-1.0-0, libicu48, libindicator3-7, libkmod2, liblcms2-2, libpci3, libplymouth2, libpolkit-agent-1-0, libpolkit-backend-1-0, libpolkit-gobject-1-0, libprocps0, libpython-stdlib, libpython2.7, libpython2.7-minimal, libpython2.7-stdlib, libpython3-stdlib, libpython3.3-minimal, libpython3.3-stdlib, libssl1.0.0, libstdc++6, libtiff5, libudev1, libx11-6, libx11-data, libx11-xcb1, libxcb-dri2-0, libxcb-glx0, libxcb-render0, libxcb-shm0, libxcb1, libxcursor1, libxext6, libxfixes3, libxi6, libxinerama1, libxml2, libxrandr2, libxrender1, libxres1, libxt6, libxtst6, libxxf86vm1, lsb-base, lsb-release, module-init-tools, multiarch-support, openssl, passwd, pciutils, perl, perl-base, perl-modules, plymouth, plymouth-theme-ubuntu-text, policykit-1, procps, python, python-gi, python-minimal, python2.7, python2.7-minimal, python3, python3-apport, python3-distupgrade, python3-gi, python3-minimal, python3-problem-report, python3-software-properties, python3-update-manager, python3.3, python3.3-minimal, rsyslog, shared-mime-info, software-properties-common, software-properties-gtk, tar, tzdata, ubuntu-release-upgrader-core, ubuntu-release-upgrader-gtk, udev, update-manager, update-manager-core, update-notifier, update-notifier-common If this question has already been answered, I'm sorry for the repost, but I would appreciate a link to the fix. Thanks. FYI: Dell Latitude D630, Intel Centrino processor. Also, the updater is currently running what seems to be the update. I will report back when it is done going through its process to let you know if it is in fact the 13.10 update. Update 2: System went through an update, but it wasn't for the OS. I think it was an update for the error message mentioned above. Now the OS update is currently running the 'distribution upgrade' portion of the update. This is further than it had gone before. Again I will report back once this is done to let you know whether or not the update was successful. Final Update: Don't know for sure what happened, but I'm almost sure that the error mentioned above was resolved in the first update prior to the 13.10 update. All set.

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• Would learning any (linguistic) language imparticular further your programming career?

  - by Anonymous

  It seems apparent that English is the dominant international language for programming (in the West, at least!) based on previous P.SE questions. Or maybe not, given that a highly upvoted comment correctly points out that asking a question like that on a predominantly English site will skew the results. This question is about whether there is a benefit in learning a foreign language for software development. For example, do the Chinese have completely different software tools, langugages, technologies etc? How about Japanese, Russian, and other non-latin based languages? Am I/are we missing an entire world of software development languages, tools and so on that only exist in these other languages? Or do people that know these languages still learn and program using the tools and languages we all know and love?

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• Somewhere to get inspiration - Pair up the creative with the tech

  - by Morten Bergfall

  I am a somewhat green developer; some work experience, last year of school. As most of you, I am constantly working on an assortment of personal projects. Since my mind often has a somewhat drifting characteristic; I am not always able to keep the projects in check. After some time they all exhibit the moral fiber of Vikings, harlots and chain-letter-knitters. This includes constant forking, round-abouting, eating of school assignments of rather mundane, and hence pretty yawn-inducing, specifications, and of course quite a bit of gathering of folder dust. Well, on to my question....is there a place, forum... or something with the purpose of linking people with ideas to the people actually being able to bring said ideas to life? Of course, I know of the professional ones, like rent-a-coder and such. And there seem to be a lot of open source projects available for participation. What I'm looking for doesn't really fit into any of those categories....the form would be somewhat like rent-a-coder, but this is ideas&inspiration, not bubble-sort-my-quarterly-for-a-buck. The possibilities for developing bonds, spicy code, and plain old fun seem quite possible.As I see it, the main benefit would be that we (that is the tech-flipside of the proverbial eCoin) get something worthwhile to do, rather than squeeze the last creative grain out of our code-heavy brains.To give it some perspective...: My last project consists of an absurd jQuery-plugin that includes animated png-robots migrating from Google Earth to drag a html-element of your choosing onto the map, where it gets color, for so to be dragged back by this poorly animated robot.... Often, the line between the creative and the tech is blurred, to say the least. I wouldn't think that would be a problem. Think someone who has developed a nifty little windows application, then sees possibility for a broader use, perhaps some sort of networking functionality. This fellow sadly lacks the skill to implememet this. So he, she or it would then seek a developer with the know-how and they could complete this project together. So, do any of you know of such a place, or can nudge in the right direction? And yes, I understand completely that I should be dedicating myself to doing school work, or applying for mundane developer positions, so please.... :-) UPDATE Sadly, I'm situated in Oslo, Norway, and the number of developers are somewhat limited...and I have had quite some ahem personality issues with the ones who are available ;-) So I feel I must go deeper; search the multitude of the web...

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