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• One Does Like To Code: DevoxxUK

  - by Tori Wieldt

  What's happening at Devoxx UK? I'll be talking to Rock Star speakers, Community leaders, authors, JSR leads and more.  This video is a short introduction.   Check out these great sessions: Thursday, June 12Perchance to Stream with Java 8by Paul Sandoz13:40 - 14:30 | Room 1 Making the Internet-of-Things a Reality with Embedded Javaby Simon Ritter11:50 - 12:40 | Room 4 Java SE 8 Lambdas and Streams Labby Simon Ritter17:00 - 20:00 | Room Mezzanine Safety Not Guaranteed: Sun. Misc. Unsafe and the Quest for Safe Alternativesby Paul Sandoz18:45 - 19:45 | Room 3 Join the Java EvolutionHeather VanCuraPatrick Curran19:45 – 20:45 | Room 2  Glassfish is Here to StayDavid DelabasseeAntonio Goncalves19:45 – 20:45 | Room Expo Here is the full line-up of sessions. Devoxx UK includes a Hackergarten, where can devs work an Open Source project of their choice. The Adopt OpenJDK and Adopt a JSR Program folks will be there to help attendees contribute back to Java SE and Java EE itself!   Saturday includes a special Devoxx4Kids event in conjunction with the London Java Community. It's design to teach 10-16 year-olds simple programming concepts, robotics, electronics, and games making. Workshops include LEGO Mindstorms (robotic engineering), Greenfoot (programming), Arduino (electronics), Scratch (games making), Minecraft Modding (game hacking) and NAO (robotic programming). Small fee, you must register. If you can't attend Devoxx UK in person, stay tuned to the YouTube/Java channel. I'll be doing plenty of interviews so you can join the fun from around the world. 

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• Upgrade from Linux Mint 12 to Kubuntu 12.04?

  - by MountainX

  Is there an "easy" way to "upgrade" my existing Linux Mint 12 install to Kubuntu 12.04 beta 2? I know I could reinstall. Usually I would do a clean install to avoid unexpected issues. But in this case, I don't have time to reconfigure everything from my printers to my installed software, so I am looking for the quick/easy way, but I also want to avoid big risks of an upgrade gone wrong. I'm hoping to just change some repos and run a few commands from the terminal. I don't mind editing a few config files as long as I can find good HOWTOs. But I don't want to be the pioneer (arrows in back). I'm hoping someone has done this before and has a set of steps. For context, I recently installed KDE 4.8 SC onto Kubuntu 11.10 using PPAs. This was on another computer. That wasn't a problem. But I decided to do a fresh install of Kubuntu 12.04 later. I like it well enough that I want to change my other computer from Linux Mint 12 to Kubuntu. (I'm going all-in with KDE. It's now my desktop of choice.) This Linux Mint upgrade will be a move from Gnome and MGSE to KDE, so that will probably complicate things at bit compared to something like upgrading Kubuntu 11.10 to KDE 4.8. References: http://www.psychocats.net/ubuntu/kde Is it safe to install Kubuntu-desktop in 11.10?

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• Current SPARC Architectures

  - by Darryl Gove

  Different generations of SPARC processors implement different architectures. The architecture that the compiler targets is controlled implicitly by the -xtarget flag and explicitly by the -arch flag. If an application targets a recent architecture, then the compiler gets to play with all the instructions that the new architecture provides. The downside is that the application won't work on older processors that don't have the new instructions. So for developer's there is a trade-off between performance and portability. The way we have solved this in the compiler is to assume a "generic" architecture, and we've made this the default behaviour of the compiler. The only flag that doesn't make this assumption is -fast which tells the compiler to assume that the build machine is also the deployment machine - so the compiler can use all the instructions that the build machine provides. The -xtarget=generic flag tells the compiler explicitly to use this generic model. We work hard on making generic code work well across all processors. So in most cases this is a very good choice. It is also of interest to know what processors support the various architectures. The following Venn diagram attempts to show this: A textual description is as follows: The T1 and T2 processors, in addition to most other SPARC processors that were shipped in the last 10+ years supported V9b, or sparcvis2. The SPARC64 processors from Fujitsu, used in the M-series machines, added support for the floating point multiply accumulate instruction in the sparcfmaf architecture. Support for this instruction also appeared in the T3 - this is called sparcvis3 Later SPARC64 processors added the integer multiply accumulate instruction, this architecture is sparcima. Finally the T4 includes support for both the integer and floating point multiply accumulate instructions in the sparc4 architecture. So the conclusion should be: Floating point multiply accumulate is supported in both the T-series and M-series machines, so it should be a relatively safe bet to start using it. The T4 is a very good machine to deploy to because it supports all the current instruction sets.

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• Help in decide the partition to install ubuntu

  - by G.Ashwin kumar

  I have a PC running with windows 7 ultimate 64 bit version with 4 gig Ram. I have a 320 gig hard disk , in which I have allocated 120 gig for windows 7, 100 gig for NY files(named ashwin in windows) and rest 80-90 gig partitioned but empty NTFS partition.Now where do I install Ubuntu so that windows and data is safe. I got the option install with windows I selected it , it then shows select drive(SCSI1 (0,0,0) (sda) -320.1 GB ATA WDC WD3200AAJS-6) and allocate driver by dragging the divider below which shows 66.5gb and 59.3 GB respectively. Which one do I go with? I clicked advance partitioning it shows five devices: device , type, m.point ,size.(mb), used(mb)......... /dev/sda1, NTFS, 104 , 35 (windows 7 loader) /dev/sda2, NTFS, 104752, 23604 /dev/sda3, NTFS, 125829, 10161 /dev/sda5, NTFS, 89382, 3221 when I checked size in properties it showed name of drive according to windows, used.Gb, free, total. ashwin, 10.2, 115.7, 125.8 c drive, 23.6, 81.1, 104.8 new volume, 92.6mb, 89.3, 89.4 except mentioned everything in gigabytes.ignore the last dots. I want to install it in new volume or using that space how do I do it? Explain in detail I'm a beginner.

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• Tor Browser Failing to Load

  - by Ben

  Dec 12 22:32:25.313 [notice] Tor v0.2.3.22-rc (git-4a0c70a817797420) running on Linux. Dec 12 22:32:25.313 [notice] Tor can't help you if you use it wrong! Learn how to be safe at https://www.torproject.org/download/download#warning Dec 12 22:32:25.313 [notice] Read configuration file "/etc/tor/torrc". Dec 12 22:32:25.319 [notice] Initialized libevent version 2.0.19-stable using method epoll (with changelist). Good. Dec 12 22:32:25.319 [notice] Opening Socks listener on 127.0.0.1:9050 Dec 12 22:32:25.319 [warn] Could not bind to 127.0.0.1:9050: Address already in use. Is Tor already running? Dec 12 22:32:25.319 [warn] Failed to parse/validate config: Failed to bind one of the listener ports. Dec 12 22:32:25.319 [err] Reading config failed--see warnings above. I've tried reinstalling it and I always get this error after powering off and back on, despite it working fine directly after the install...

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• ArchBeat Link-o-Rama Top 10 for November 2, 2012

  - by Bob Rhubart

  ADF Mobile - Login Functionality | Andrejus Baranovskis "The new ADF Mobile approach with native deployment is cool when you want to access phone functionality (camera, email, sms and etc.), also when you want to build mobile applications with advanced UI, " reports Oracle ACE Director Andrejus Baranovskis. Big Data: Running out of Metric System | Andrew McAfee Do very large numbers make your brain hurt? Better stock up on aspirin. According to Andrew McAfee: "It seems safe to say that before the current decade is out we’ll need to convene a 20th conference to come up with some more prefixes for extraordinarily large quantities not to describe intergalactic distances or the amount of energy released by nuclear reactions, but to capture the amount of digital data in the world." Cloud computing will save us from the zombie apocalypse | Cloud Computing - InfoWorld "It's just a matter of time before we migrate our existing IT assets to public cloud systems," says InfoWorld cloud blogger David Linthicum. "Additionally, it's a short window until the dead rise from the grave and attempt to eat our brains." Is is Halloween or something? Thought for the Day "A computer lets you make more mistakes faster than any invention in human history—with the possible exceptions of hand guns and tequila." — Mitch Ratcliffe

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• Edd strikes again &ndash; IronRuby for Rubyists on InfoQ

  - by Eric Nelson

  Colleague, friend and generally top guy on IronRuby Edd Morgan has just been published over on InfoQ. To wet the appetite… a snippet or three. IronRuby for Rubyists IronRuby is Microsoft's implementation of the Ruby language we all know and love with the added bonus of interoperability with the .NET framework — the Iron in the name is actually an acronym for 'Implementation running on .NET'. It's supported by the .NET Common Language Runtime as well as, albeit unofficially, the Mono project. You'd be forgiven for harbouring some question in your mind about running a dynamic language such as Ruby atop the CLR - that's where the DLR (Dynamic Language Runtime) comes in. The DLR is Microsoft's way of providing dynamic language capability on top of the CLR. Both IronRuby and the DLR are, as part of Microsoft's commitment to open source software, available as part of the Microsoft Public License on GitHub and CodePlex respectively… And Metaprogramming with IronRuby The art and science of metaprogramming — especially in Ruby, where it's an absolute joy — is something that could very easily span an entire article. As you would hope, IronRuby code is fully able to manipulate itself allowing you to bend your classes to your whim just as you would expect with a good dynamic language… And Riding the irails? So let's get to the point. I think it's a solid bet to make that a large proportion of Ruby programmers are familiar with the Rails framework - perhaps it's even safe to assume that most were first led to the Ruby language by the siren song of the Rails framework itself. Long story short, IronRuby is compatible enough to run your Rails app… Now… get yourself over to the full article and also check out some of Edds other work below. Related Links: 5 Steps to getting started with IronRuby Mini Book Review of IronRuby Unleashed by Shay Friedman Guest Post: Using IronRuby and .NET to produce the ‘Hello World of WPF’ – also by Edd Getting PhP and Ruby working on Windows Azure and SQL Azure Guest Post: What's IronRuby, and how do I put it on Rails? – also by Edd

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• Backup those keys, citizen

  - by BuckWoody

  Periodically I back up the keys within my servers and databases, and when I do, I blog a reminder here. This should be part of your standard backup rotation – the keys should be backed up often enough to have at hand and again when they change. The first key you need to back up is the Service Master Key, which each Instance already has built-in. You do that with the BACKUP SERVICE MASTER KEY command, which you can read more about here. The second set of keys are the Database Master Keys, stored per database, if you’ve created one. You can back those up with the BACKUP MASTER KEY command, which you can read more about here. Finally, you can use the keys to create certificates and other keys – those should also be backed up. Read more about those here. Anyway, the important part here is the backup. Make sure you keep those keys safe! Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• How is the Ubuntu installation supposed to work?

  - by Bob D

  I have given up on installing Ubuntu 12.04.01 for the sixth time. I finally got Windows XP to work again. So I blitzted the Ubuntu partition and the swap partition and was about to install the sixth try when it occurred to me that ought to ask how is is "supposed" to go. My installer will install Ubuntu on the Linus ext4 partition I created by hand in Windows on my C drive. But the installer keeps insisting on installing the OS on my D drive unless I intervene. So if I choose "do something else" it will accept installing Ubuntu on the C drive in the partition I previously created, but it insists on putting the "Device for boot loader installation" on the D drive. I can select a different drive at this point (where I could not with the "along side windows choice) but what drive to I choose??? It lists sda, sda1, sda5, sdb and sdb1. The five times before this all ended in disaster letting the installer choose. So I need human intervention. Where is the safe place to do this. The results from the previous attempts left me with only the Ubuntu that would boot, the boot to windows from the grub menu failed every time. Is there a better version of Ubuntu I can use? Is V12.04.01 messed up? My goal is still to use Wine on it to run PC programs. I would like to find a shell or skin or something that makes it seem like windows but have the security and power of Linux under the good. I have seen this type of system and it worked very well. I know I am getting long winded but I have been though at least four of the seven rings of hell already, so I want this install to be the last.

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• Check parameters annotated with @Nonnull for null?

  - by David Harkness

  We've begun using FindBugs with and annotating our parameters with @Nonnull appropriately, and it works great to point out bugs early in the cycle. So far we have continued checking these arguments for null using Guava's checkNotNull, but I would prefer to check for null only at the edges--places where the value can come in without having been checked for null, e.g., a SOAP request. // service layer accessible from outside public Person createPerson(@CheckForNull String name) { return new Person(Preconditions.checkNotNull(name)); } ... // internal constructor accessed only by the service layer public Person(@Nonnull String name) { this.name = Preconditions.checkNotNull(name); // remove this check? } I understand that @Nonnull does not block null values itself. However, given that FindBugs will point out anywhere a value is transferred from an unmarked field to one marked @Nonnull, can't we depend on it to catch these cases (which it does) without having to check these values for null everywhere they get passed around in the system? Am I naive to want to trust the tool and avoid these verbose checks? Bottom line: While it seems safe to remove the second null check below, is it bad practice? This question is perhaps too similar to Should one check for null if he does not expect null, but I'm asking specifically in relation to the @Nonnull annotation.

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• Does immutability entirely eliminate the need for locks in multi-processor programming?

  - by GlenPeterson

  Part 1 Clearly Immutability minimizes the need for locks in multi-processor programming, but does it eliminate that need, or are there instances where immutability alone is not enough? It seems to me that you can only defer processing and encapsulate state so long before most programs have to actually DO something. If a program performs actions on multiple processors, something needs to collect and aggregate the results. All this involves multi-process communication before, after, and possibly during some transformations. The start and end state of the machines are different. Can this always be done with no locks just by throwing out each object and creating a new one instead of changing the original (a crude view of immutability)? What cases still require locking? I'm interested in both the theoretical/academic answer and the practical/real-world answer. I know a lot of functional programmers like to talk about "no side effect" but in the "real world" everything has a side effect. Every processor click takes time and electricity and machine resources away from other processes. So I understand that there may be more than one perspective to answer this question from. If immutability is safe, given certain bounds or assumptions, I want to know what the borders of the "safety zone" are exactly. Some examples of possible boundaries: I/O Exceptions/errors Interfaces with programs written in other languages Interfaces with other machines (physical, virtual, or theoretical) Special thanks to @JimmaHoffa for his comment which started this question! Part 2 Multi-processor programming is often used as an optimization technique - to make some code run faster. When is it faster to use locks vs. immutable objects? Given the limits set out in Amdahl's Law, when can you achieve better over-all performance (with or without the garbage collector taken into account) with immutable objects vs. locking mutable ones? Summary I'm combining these two questions into one to try to get at where the bounding box is for Immutability as a solution to threading problems.

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• Museum of Modern Art Starts Video Game Collection; Acquires Myst, Pac-Man, and More

  - by Jason Fitzpatrick

  The Museum of Modern Art is weighing in on the video-games-as-art debate by starting a collection of iconic video games and putting them up for public display. Read on to see what games are included in the initial batch and the MoMA’s reasons behind starting a video game collection. Although the MoMA is slated to grow to over 40 titles, the seed batch is 14 titles including: Pac-Man, Tetris, Sim City 2000, Myst, Portal, and Dwarf Fortress. In the announcement they explain the motivation for building a video game collection: Are video games art? They sure are, but they are also design, and a design approach is what we chose for this new foray into this universe. The games are selected as outstanding examples of interaction design—a field that MoMA has already explored and collected extensively, and one of the most important and oft-discussed expressions of contemporary design creativity. Our criteria, therefore, emphasize not only the visual quality and aesthetic experience of each game, but also the many other aspects—from the elegance of the code to the design of the player’s behavior—that pertain to interaction design. In order to develop an even stronger curatorial stance, over the past year and a half we have sought the advice of scholars, digital conservation and legal experts, historians, and critics, all of whom helped us refine not only the criteria and the wish list, but also the issues of acquisition, display, and conservation of digital artifacts that are made even more complex by the games’ interactive nature. This acquisition allows the Museum to study, preserve, and exhibit video games as part of its Architecture and Design collection. The above quote is only a small snippet of a much lengthier look at the benefits of examining and preserving video games, hit up the link below to check out the full post including future titles the MoMA would like to include in their archive. Video Games: 14 in the Collection, for Starters [Inside/Out] How To Boot Your Android Phone or Tablet Into Safe Mode HTG Explains: Does Your Android Phone Need an Antivirus? How To Use USB Drives With the Nexus 7 and Other Android Devices

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• How to recover broken dpkg after lucid-bleed ppa-purge?

  - by TryTryAgain

  Did a ppa-purge of lucid-bleed and dpkg didn't downgrade properly and now it is broken. dpkg: PreDepends: tar (>= 1.23) but 1.22-2ubuntu1 is to be installed What scares me is when simulating the removal of dpkg I get: Removing this package may render the system unusable. Are you sure you want to do that? and then the list of packages which depend on it, which will also be removed, is obviously very long. Is it safe for me to remove dpkg just to reinstall it? How would I ensure the list of packages which were also removed are then reinstalled? Will forcing the version of dpkg help? (FYI: simulating a forced version brings up a much smaller list of applications which will also be removed). Any other suggestions? Additional information based on comments: ppa-purge log: http://pastebin.com/1kT8cLvP If I sudo apt-get install dpkg=1.15.5.6ubuntu4.5 I get The following packages have unmet dependencies: libdpkg-perl: Depends: dpkg (= 1.15.8) but 1.15.5.6ubuntu4.5 is to be installed which sucks because that means more would be broken after doing so...but when I force the version through Synaptic I get: To be removed alien, build-essential, cdbs, checkinstall, debhelper, devscripts, dpkg-dev, google-earth-stable, googleearth-package, libdpkg-perl, lintian, lsb, lsb-core, lsb-cxx, lsb-desktop, lsb-graphics, lsb-languages, lsb-multimedia, lsb-printing, lsb-qt4, lsb-security, ubuntu-dev-tools.

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• Object pools for efficient resource management

  - by GameDevEnthusiast

  How can I avoid using default new() to create each object? My previous demo had very unpleasant framerate hiccups during dynamic memory allocations (usually, when arrays are resized), and creating lots of small objects which often contain one pointer to some DirectX resource seems like an awful lot of waste. I'm thinking about: Creating a master look-up table to refer to objects by handles (for safety & ease of serialization), much like EntityList in source engine Creating a templated object pool, which will store items contiguously (more cache-friendly, fast iteration, etc.) and the stored elements will be accessed (by external systems) via the global lookup table. The object pool will use the swap-with-last trick for fast removal (it will invoke the object's ~destructor first) and will update the corresponding indices in the global table accordingly (when growing/shrinking/moving elements). The elements will be copied via plain memcpy(). Is it a good idea? Will it be safe to store objects of non-POD types (e.g. pointers, vtable) in such containers? Related post: Dynamic Memory Allocation and Memory Management

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• Was API hooking done as needed for Stuxnet to work? I don't think so

  - by The Kaykay

  Caveat: I am a political science student and I have tried my level best to understand the technicalities; if I still sound naive please overlook that. In the Symantec report on Stuxnet, the authors say that once the worm infects the 32-bit Windows computer which has a WINCC setup on it, Stuxnet does many things and that it specifically hooks the function CreateFileA(). This function is the route which the worm uses to actually infect the .s7p project files that are used to program the PLCs. ie when the PLC programmer opens a file with .s7p the control transfers to the hooked function CreateFileA_hook() instead of CreateFileA(). Once Stuxnet gains the control it covertly inserts code blocks into the PLC without the programmers knowledge and hides it from his view. However, it should be noted that there is also one more function called CreateFileW() which does the same task as CreateFileA() but both work on different character sets. CreateFileA works with ASCII character set and CreateFileW works with wide characters or Unicode character set. Farsi (the language of the Iranians) is a language that needs unicode character set and not ASCII Characters. I'm assuming that the developers of any famous commercial software (for ex. WinCC) that will be sold in many countries will take 'Localization' and/or 'Internationalization' into consideration while it is being developed in order to make the product fail-safe ie. the software developers would use UNICODE while compiling their code and not just 'ASCII'. Thus, I think that CreateFileW() would have been invoked on a WINCC system in Iran instead of CreateFileA(). Do you agree? My question is: If Stuxnet has hooked only the function CreateFileA() then based on the above assumption there is a significant chance that it did not work at all? I think my doubt will get clarified if: my assumption is proved wrong, or the Symantec report is proved incorrect. Please help me clarify this doubt. Note: I had posted this question on the general stackexchange website and did not get appropriate responses that I was looking for so I'm posting it here.

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• Google suddenly only indexes https and not http

  - by spender

  So all of a sudden, searches for our site "radiotuna" give out the result as an HTTPS link. https://www.google.com/?q=radiotuna#hl=en&safe=off&output=search&sclient=psy-ab&q=radiotuna&oq=radiotuna&gs_l=hp.12...0.0.0.3499.0.0.0.0.0.0.0.0..0.0.les%3B..0.0...1c.LnOvBvgDOBk&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=177c7ff705652ec3&biw=1366&bih=602 We only use https for the download of two specific files (these urls are resources used for autoupdate functionality of an app we distribute). All other parts of the site should be served over http. We wouldn't like to see any other traffic over https, nor any of our site links to appear in search engines as https. I'd like to address this issue. It seems that the following solutions are available: hand out an https specific robots.txt as such: User-agent: * Disallow: / and/or at app-level, 301 permanent redirect all requests (except the two above) to HTTP if they come in as HTTPS. My concern with the robots method is that, say (for some reason) google decided not to index http pages, disallowing https pages might mean that google has nothing left to index with disastrous consequences for our ranking. This means I'm inclined to go with a 301 redirect. Any thoughts?

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• How should I structure my database to gain maximum efficiently in this scenario?

  - by Bob Jansen

  I'm developing a PHP script that analyzes the web traffic of my clients websites. By placing a link to a javascript on the clients website (think of Google Analyses), my script harvests information like: the visitors IP address, reference link, current page link, user agent, etc. Now my clients can view these statistics via a control panel that I have build. These clients can also adjust profile settings, set firewall rules, create support tickets and pay invoices. Currently all the the traffic is stored in one table. You can imagine that this tabel would become very large as some my clients receive thousands of pageviews per day. Furthermore, all the traffic data of each client would be stored in the same table, creating a mess. This is the same for the firewall rules currently, and the invoice and support system. I'm looking for way to structure my database in a more organized way to hold large amounts of data of multiple users. This is the first project that I'm developing that deals with so much data, and would like to hear suggestions and tips. I was thinking of using multiple databases to structure the data. The main database will store users data (email,pass,id,etc) admin/website settings. Than each client will have an unique database labeled prefix_userid, which carry tables holding their traffic, invoice, and support ticket data. Would this be a solution, and would it slow down or speed up overall performances (that is spreading the data over muliple databases). I have a solid VPS, but would like to safe and be as effient as possible.

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• Financial institutions build predictive models using Oracle R Enterprise to speed model deployment

  - by Mark Hornick

  See the Oracle press release, Financial Institutions Leverage Metadata Driven Modeling Capability Built on the Oracle R Enterprise Platform to Accelerate Model Deployment and Streamline Governance for a description where a "unified environment for analytics data management and model lifecycle management brings the power and flexibility of the open source R statistical platform, delivered via the in-database Oracle R Enterprise engine to support open standards compliance." Through its integration with Oracle R Enterprise, Oracle Financial Services Analytical Applications provides "productivity, management, and governance benefits to financial institutions, including the ability to: Centrally manage and control models in a single, enterprise model repository, allowing for consistent management and application of security and IT governance policies across enterprise assets Reuse models and rapidly integrate with applications by exposing models as services Accelerate development with seeded models and common modeling and statistical techniques available out-of-the-box Cut risk and speed model deployment by testing and tuning models with production data while working within a safe sandbox Support compliance with regulatory requirements by carrying out comprehensive stress testing, which captures the effects of adverse risk events that are not estimated by standard statistical and business models. This approach supplements the modeling process and supports compliance with the Pillar I and the Internal Capital Adequacy Assessment Process stress testing requirements of the Basel II Accord Improve performance by deploying and running models co-resident with data. Oracle R Enterprise engines run in database, virtually eliminating the need to move data to and from client machines, thereby reducing latency and improving security"

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• Building a linux system

  - by webyankee

  I am worried about hardware compatibility. I have several older PCs with various hardware and wish to install Linux onto them. I have several ideas about what I would like to do. first, I am a novice and know just enough to get me into trouble in a lot of areas. I can not find adequate descriptions of the usage between a desktop and a server version of Linux. When would you want to choose to build a server instead of a desktop and can you change a desktop to a server if you need higher functionality? I wonder if I should use 32 or 64 bit? I believe 32 bit on older (P1 or P2 systems) would be the safe way to go. what is the extent can these systems be used? Can they used to play high end graphics on-line games or just simple browsing and word processing? How do I determine what programs the system can use? I have pondered on the idea of linking several systems together to make one big computer. I know this can be done with some functionality improvement. Any Ideas about this?

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• How is software used in critical life-or-death systems tested?

  - by waiwai933

  An airplane, as opposed to, for example, a website, is a system where any failure in certain systems is completely unacceptable, since errors in e.g. flight monitoring can cause the autopilot to malfunction and do a dive. Obviously, this doesn't happen since the brilliant engineers at Boeing and Airbus have checks in the autopilot to make sure it doesn't suddenly decide a dive is a perfectly acceptable and safe maneuver. Or perhaps the computer crashes, and the pilots in the newer fly-by-wire aircraft can no longer actually fly the plane. Of course, there are various safety procedures and redundancies built into these systems to prevent a crash (of both the software and the aircraft). However, on the other hand, it's quite obvious that software isn't perfect—both open source and closed source software do crash regularly, and only the simplest "Hello World" program doesn't fail. How can the engineers who design the software systems in the aeronautic, medical, and other life-or-death industries manage to test their software so that it doesn't fail (and if it does fail, at least fail gracefully)? I'm desperately hoping that you're not all going to go: "Oh, I work for Boeing/Airbus/(some other company) and it's not! Have fun on your next flight/hospital visit."

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• Resolution stuck in 640x480 in grub, 11.04 and 12.04

  - by user89797

  I have three operating systems on my machine, Windows 7x64, Ubuntu 11.10 and 12.04 both x64 as well. All three were running at full resolution for my monitor, as well as in the Grub 1.99 boot screen. After booting into Windows, I rebooted my machine and found my Grub resolution was suddenly 640x480. Booting into both versions of Ubuntu, I find myself stuck at that resolution as well. I made no driver changes recently, and hadn't even booted into the 11.10 build in a month or more. I've gone through both proprietary Nvidia driver options for my card (GeForce 9800GT) as well as the open source drivers in 12.04 to no avail. I can't figure out what could have caused this change in both versions of Ubuntu and Grub simultaneously. Windows 7 is unaffected so I think that safely rules out hardware failure. EDIT Ok, so I couldn't boot an graphical live disks, I tried ubuntu 12.04 i386 and x64 as well as 12.10 beta x64 and all of them would flash the initial logo, go to a blank screen with a flashing cursor in the upper left and then my display would die. I managed to boot 12.04 server and get into recovery. I reinstalled grub and went into recovery mode for my 12.04 build. If I boot in safe graphics mode I can get 1280x768, but as soon as I reboot it's broken again. I've tried reinstalling the nvidia drivers and that leaves me with a system stuck at max 640x480. None of these changes have had any impact on the 11.10 build, which is still stuck at 640x480 Given that I can push a somewhat higher resolution in 12.04, and full resolution in windows 7 I'm pretty convinced it's not an issue of my monitor failing. It must be something to do with the graphics drivers. I can't figure out what could be the issue though. I'm especially perplexed that I can't boot any live images

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• How to Pin Any File to the Start Screen in Windows 8

  - by Taylor Gibb

  By default Windows 8 only allows you to pin a few file types to the Start Screen. Read on to find out how you can change that by editing the registry. How to Pin Any File to the Start Screen in Windows 8 Press the Win + R keyboard combination to open a run box, then type notepad and press enter. When notepad opens, paste the following into the new document: Windows Registry Editor Version 5.00 [HKEY_CLASSES_ROOT\*\shell\pintostartscreen] “MUIVerb”=”@shell32.dll,-51201″ “NeverDefault”=”" “Description”=”@shell32.dll,-51202″ “MultiSelectModel”=”Single” [HKEY_CLASSES_ROOT\*\shell\pintostartscreen\command] “DelegateExecute”=”{470C0EBD-5D73-4d58-9CED-E91E22E23282}” Then click on the File menu item and select save as… Before you go any further, change the Save as type to All Files. Then give your file a name ending in .reg and click Save. PinToStartHack.reg To use the hack, just double click on the .reg file you just created. When you are prompted about whether you want to continue, click Yes. Now you can pin any file to the Start Screen. Undo the Change If you ever wish to undo the change, press the Win + R keyboard combination and type regedit, then press enter. Then drill down into: HKEY_CLASSES_ROOT\*\shell\ Finally delete the pintostartscreen key. That’s all there is to it. How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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• Purpose oriented user accounts on a single desktop?

  - by dd_dent

  Starting point: I currently do development for Dynamics Ax, Android and an occasional dabble with Wordpress and Python. Soon, I'll start a project involving setting up WP on Google Apps Engine. Everything is, and should continue to, run from the same PC (running Linux Mint). Issue: I'm afraid of botching/bogging down my setup due to tinkering/installing multiple runtimes/IDE's/SDK's/Services, so I was thinking of using multiple users, each purposed to handle the task at hand (web, Android etc) and making each user as inert as possible to one another. What I need to know is the following: Is this a good/feasible practice? The second closest thing to this using remote desktops connections, either to computers or to VM's, which I'd rather avoid. What about switching users? Can it be made seamless? Anything else I should know? Update and clarification regarding VM's and whatnot: The reason I wish to avoid resorting to VM's is that I dislike the performance impact and sluggishness associated with it. I also suspect it might add a layer of complexity I wish to avoid. This answer by Wyatt is interesting but I think it's only partly suited for requirements (web development for example). Also, in reference to the point made about system wide installs, there is a level compromise I should accept as experessed by this for example. This option suggested by 9000 is also enticing (more than VM's actually) and by no means do I intend to "Juggle" JVMs and whatnot, partly due to the reason mentioned before. Regarding complexity, I agree and would consider what was said, only from my experience I tend to pollute my work environment with SDKs and runtimes I tried and discarded, which would occasionally leave leftovers which cause issues throught the session. What I really want is a set of well defined, non virtualized sessions from which I can choose at my leisure and be mostly (to a reasonable extent) safe from affecting each session from the other. And what I'm really asking is if and how can this be done using user accounts.

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• What is the "default" software license?

  - by Tesserex

  If I release some code and binaries, but I don't include any license at all with it, what are the legal terms that apply by default (in the US, where I am). I know that I automatically have copyright without doing anything, but what restrictions are there on it? If I upload my code to github and announce it as a free download / contribute at will, then are people allowed to modify and close source my work? I haven't said that they cannot, as a GPL would, but I don't feel that it would by default be acceptable to steal my work either. So what can and cannot people do with code that is freely available, but has absolutely no licensing terms attached? By the way, I know that it would be a good idea for me to pick a license and apply it to my code soon, but I'm still curious about this. Edit Thanks! So it looks like the consensus is that it starts out very restricted, and then my actions imply any further rights. If I just put software on my website with no security, it would be an infringement to download it. If I post a link to that download on a forum, then that would implicitly give permission to use it for free, but not distribute it or its derivatives (but you can modify it for your own use). If I put it on GitHub, then it is conveyed as FOSS. Again, this is probably not codified exactly in law but may be enough to be defensible in court. It's still a good idea to post a complete license to be safe.

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• help download and install and save and use my wireless stick modem and software

  - by ADAM

  i installed Linux Ubuntu after my win os went totally dead by fatal blue screen. cannot reboot or install form CD ROM or get safe mode i installed Linux Ubuntu i still unable to install my wireless stick usb modem to connect and surf the Internet wireless form my provider. i use wireless network from neighborhood And i find it difficult to download and install and save porg and application from the INTERNET like skype and real player and others. it is different form windows and not that easy to use. i click to download for example and find real player but when click on it it opens as text file only and i cannot use it as it should be used for video and download and record from you tube. how to do it. and is there with Linux Ubuntu similar prog to download and record and save from you tube as in windows? Is there any trick to restart or reboot windows OS from the dead. can i use linux to reboot windows or to import my files from the blue screen stopped windows7? Any help is highly appreciated. thanks please email me to : [email protected]

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