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• Why does my DVD drive spin up every minute or so, spin down, and repeat (new Dell Studio 15 with Win

  - by cybergibbons

  We have just got a new Dell Studio 15 laptop running Windows 7 home premium with slot load DVD drive. If there is a DVD drive in the drive, every minute or so, the drive will spin up, make a couple of noises like it is reading something and then spin down. I think this is ruining battery life. There is no software running that is obviously accessing the drive. Any ideas to what it could be? Are there any tools I could use to try and identify the problem? Thanks.

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• upgraded to OSX 10.6.6 - now cannot sudo

  - by rahulk

  I've been using sudo until now. After an upgrade to 10.6.6, now sudo gives me incorrect password. My user has admin rights, and i can execute admin functions from the GUI (such as System Prefs, updating software etc). However, within Terminal, sudo has stopped accepting the password. I have repaired permissions and restarted. Some pointers ask me to use Directory Utility, but in this version it does not have a "set root user" option. I downloaded ServerAdminTool 10.5.7 but this does not work on my system. Some say to add myself to "wheel" group, but i need sudo for that. Some say if i am in admin group, i should be able to sudo, but this is not happening. (Using OS X Snow Leopard 10.6.6, earlier 10.5.8) MODERATOR: please delete this question. The issue had to do with Textpander expanding the password resulting in sudo failing. Not an OS upgrade issue.

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• Information about Release Management in a Virtual Studio development environment

  - by Bordersquirrel

  Our software development team is growing very quickly. We have around 250 developers working on about 20 different projects. The majority of development is focused around Visual Studio. The release management procedure is getting a little strained now, with users competing for time and resources on various "official" build and signing servers. What I'm looking for is information on how to setup a proper, managed release process in a Microsoft environment. Ideally, I'd like some kind of continuous integration or nightly builds, integration of version control into Visual Studio and the ability to sign binaries after QA is complete. I guess what I'm looking for is any documentation or white papers on Release Management in a Visual Studio environment. Can anyone help?

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• w00t! First post!

  - by blaird

  So, I busted my old blog and hadn't been keeping up with it. Decided it would be easier on me to use software that I didn't maintain, so several months ago I signed up for a GWB account. You are a witness to procrastination at its finest!  I was remarking to my friend Abby that I hadn't written anything in ages, that I've typed a bunch in the last 5 years or so, but that the typing belonged to someone else as work product, was boring technical mumbo jumbo, or was only good before it spoiled, that project/job/technology/tweet based freshness window that us geeks have to deal with. In short, I just didn't feel like it. So forgive the rambling sentences and my grammatical failures, you have Abby to thank ;) On the technology front I've been working with WPF, WCF and a whole lot of other alphabet soup in terms of patterns. I'm starting to get spoiled on Visual Studio 2010, and may have made a mistake by evaluating the ultimate version. Because I'm a .NET geek and an outdoor geek, expect a hodgepodge. It's nearly Easter, which for the garden means a whole lot of things. I've already started getting seed out, and started working soil. It feels good to get real dirt on your hands.

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• Implementing SOA & Security with Oracle Fusion Middleware in your solution – partner webcast September 20th 2012

  - by JuergenKress

  Security was always one of the main pain points for the IT industry, and new security challenges has been introduced with the proliferation  of the service-oriented approach to building modern software. Oracle Fusion Middleware provides a wide variety of features that ease the building service-oriented solutions, but how these services can be secured? Should we implement the security features in each and every service or there’s a better way? During the webinar we are going to show how to implement non-intrusive declarative security for your SOA components by introducing the Oracle product portfolio in this area, such as Oracle Web Services Manager and Oracle Enterprise Gateway. Agenda: SOA & Web Services basics: quick refresher Building your SOA with Oracle Fusion Middleware: product review Common security risks in the Web Services world SOA & Web Services security standards Implementing Web Services Security with the Oracle products Web Services Security with Oracle – the big picture Declarative end point security with Oracle Web Services Manager Perimeter Security with Oracle Enterprise Gateway Utilizing the other Oracle IDM products for the advanced scenarios Q&A session Delivery Format This FREE online LIVE eSeminar will be delivered over the Web. Registrations received less than 24hours prior to start time may not receive confirmation to attend. Duration: 1 hour Register Now Send your questions and migration/upgrade requests [email protected] Visit regularly our ISV Migration Center blog or Follow us @oracleimc to learn more on Oracle Technologies, upcoming partner webcasts and events. All content is made available through our YouTube - SlideShare - Oracle Mix. SOA & BPM Partner Community For regular information on Oracle SOA Suite become a member in the SOA & BPM Partner Community for registration please visit  www.oracle.com/goto/emea/soa (OPN account required) If you need support with your account please contact the Oracle Partner Business Center. Blog Twitter LinkedIn Mix Forum Technorati Tags: Technorati Tags: ISV migration center,SOA,IDM,SOA Community,Oracle SOA,Oracle BPM,BPM,Community,OPN,Jürgen Kress

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• How does Mac's command line compare to Linux?

  - by Nathan Long

  I love Ubuntu Linux - especially the commmand line. But I have to admit that, at least for now, Windows is more user-friendly - there's more software for it, more drivers, and more stuff just works. Knowing that Mac is built on Unix makes me wonder if it's the sweet spot between them. But I wonder: how similar is the Mac command line to Linux's bash? Could I pick right up with using vim and bash scripting and git, etc? Would common commands like changing directories be different? Does anybody know an online "compare and contrast" resource?

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• Decal implementation

  - by dreta

  I had issues finding information about decals, so maybe this question will help others. The implementation is for a forward renderer. Could somebody confirm if i got decal implementation right? You define a cube of any dimension that'll define the projection volume in common space. You check for triangle intersection with the defined cube to recieve triangles that the projection will affect. You clip these triangles and save them. You then use matrix tricks to calculate UV coordinates for the saved triangles that'll reference the texture you're projecting. To do this you take the vectors representing height, width and depth of the cube in common space, so that f.e. the bottom left corner is the origin. You put that in a matrix as the i, j, k unit vectors, set the translation for the cube, then you inverse this matrix. You multiply the vertices of the saved triangles by this matrix, that way you get their coordinates inside of a 0 to 1 size cube that you use as the UV coordinates. This way you have the original triangles you're projecting onto and you have UV coordinates for them (the UV coordinates are referencing the texture you're projecting). Then you rerender the saved triangles onto the scene and they overwrite the area of projection with the projected image. Now the questions that i couldn't find answers for. Is the last point right? I've never done software clipping, but it seems error prone enough, due to limited precision, that the'll be some z fighting occuring for the projected texture. Also is the way of getting UV coordinates correct?

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• Configuring Server with no monitor

  - by Scandalist

  Sitting in front of me is an HP DL 380 Generation 4 with no monitor. I'd like to install an OS on the thing but for reasons obvious, I can't. I got excited when I found the ILO port on the back but unless you have a subscription it has limited functionality. I was thinking maybe there was some software out there that booted into some kind of remote access server? When I tested it with a monitor (A friends) I set the BIOS to boot from USB so anything I can load onto a stick should boot. Ideas? Hacks?

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• Cannot upgrade to Lion using DVD

  - by James

  When I first setup my MBP on 10.6 I made a lot of newb mistakes, and was unable to get Ruby on Rails to install, amongst a lot of other things. Because of this, I decided to backup everything on to a Time Machine HDD and re-install Lion. I had a bunch of problems but managed to sort them out, requiring me to go back to 10.6 from the original disc that came with the MBP. Before I did anything however, I burnt the Lion installer that I got from the App Store to a DVD. Now though, when I try to run it, I get the following: Cannot download additional components. I've managed to download software updates, so I know it can connect to the Apple servers.

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• Disable user_deny.db in Cyrus/imapd

  - by netmano

  We have a cyrus 2.4.12 on Debian, we use packages, rather than building each software ourselves. I am getting the this "log" constantly, a lot of, various users, and 8-10 times per user request: fetching user_deny.db entry for 'user123' I have searched for it, but haven't found a real solution, there were some patches for 2.3.xx, but we don't want ot build it, we prefer to use packages. Is there any solution to disable the user_deny.db at all. We don't need this feature. It wastes the CPU as disk.

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• How does the caller ID works on voip?

  - by Cawas

  Maybe this depends on the protocol, if so, I'm wondering mostly about SIP. That's all, just focus on the title please, but for a little background... I am using voipraider and I was just trying to set it up to have a caller id as my phone number, since I can't have this voip of mine on all the time (thus using DID or being able to receive calls through voip wouldn't be a solution here). I could actually make it work, but only using voipraider software. From other places, the caller ID doesn't show properly. So, I am wondering how it actually works to be able to go and look for a fix for this. I want details about the protocol, if that's relevant.

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• Win 2008 single server development environment (architecture)

  - by Tommy Jakobsen

  I have a few questions about a test development environment that I’m setting up on this server: Intel Core i7-920 Quadcode incl. Hyper Threading 8 GB DDR3 RAM 2x 750 GB SATA-II (probably software RAID 1) The server is going to support max 5 users, maybe 10 when stressed. I was hoping that I could run all the following products on the same server: Windows Server 2008 R2 x64 w/ IIS SQL Server 2008 x64 (R2 when released) Team Foundation Server 2010 Sharepoint Foundation 2010 I know this sounds overkill, but remember that this is for development purpose and testing. This is not a production environment. My question if this will be possible at all? Should I run it all on one Windows 2008 installation, or should I run it in multiple virtual environments using Hyper-V? What do you think?

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• Spell check web pages using Firefox plugin

  - by Gopinath

  Having spelling mistakes on a website degrades customer experience by many times. Developers and website content creators spend good amount of time in going through the content manually to make sure that there are no spelling mistakes. At times few mistakes slip in as manual process is error prone. There are few web services and tool available in the market which provide automated spell checking services but they have certain limitations like – high fees to use the service, limitation on the number of pages they scan for errors, privacy issues, etc. What about a free tool that runs locally on your PC and spell checks unlimited web pages? Here comes Spell Checker extension for  Firefox web browser. This free Firefox extension is developed by  Gaurang, a Software Test Engineer based out in India. Once the extension is installed it adds a new context menu “Check Spelling” and a small icon to Add-On bar. To check spellings of a web page just click on the icon or the context menu and it will highlight all the errors on the page. By default SpellChecker extension uses US English dictionary to find spell mistakes and supports spell checking in other languages with installation of dictionaries. Download SpellChecker Extension for Firefox. Spell check dictionaries:  US-English , GB English and  Australian English

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• Why does my Mac always crash when I enable `ask for password after screensaver ended`?

  - by Koning Baard XIV

  I have enabled these two things: Placing the mouse-pointer in the bottom-left corner of any display makes the screensaver appear After the screensaver or stand-by has ended, ask for password However, this combination always leads to this (Black Screen of Death) after entering the screensaver with the bottom-left corner: Here are my system specs: Hardware Overview: Model Name: iMac Model Identifier: iMac9,1 Processor Name: Intel Core 2 Duo Processor Speed: 2,66 GHz Number Of Processors: 1 Total Number Of Cores: 2 L2 Cache: 6 MB Memory: 2 GB Bus Speed: 1,07 GHz Boot ROM Version: IM91.008D.B08 SMC Version (system): 1.44f0 Serial Number (system): W89171JF0TF Hardware UUID: 323A90F0-8A2F-5057-B501-2087489E0DFF System Software Overview: System Version: Mac OS X 10.6.3 (10D573) Kernel Version: Darwin 10.3.0 Boot Volume: Macintosh HD Boot Mode: Normal Computer Name: YOU SHOULD NOT KNOW THIS User Name: YOU SHOULD NOT KNOW THIS Secure Virtual Memory: Not Enabled 64-bit Kernel and Extensions: No Time since boot: 11:46 Can anyone help me? Thanks

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• Monitor HTTP usage on network from Linux free

  - by David

  I manage a small office network. I am looking to start monitoring/logging internet usage (website requests) for each user on a small network. All the windows clients are running through a switch to a BT router. I also have a linux (centos) machine which is connected as a client to the BT router as well. Is there any free software I can install on the linux box (or my own machine) to allow me to log and monitor websites requested by users kind of like browser history. Ideally, something that would collect each client's browser history in 1 place. Thanks

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• Key announcements from Oracle Openworld - Video series

  - by Javier Puerta

  If you missed Oracle Openworld now you have the opportunity to watch a series of four 15-min webcasts with the key announcements, explained by EMEA key executives. Oracle OpenWorld I, OMN - Part 1 OPENWORLD I: Oracle's Cloud. interview with Alan HartwellGaye Hudson and Steve Walker, EMEA Corporate Communications take a look at Oracle's announcements leading up to Oracle Open World and talk to Alan Hartwell, VP Sales, Engineered Solutions, Exadata, Exalogic about Oracle's cloud offering. Oracle Open World II , OMN Part 2 OPENWORLD II: Engineered Systems with Alan HartwellGaye Hudson, VP Corporate Communications, EMEA talks to Alan Hartwell, VP Sales, Engineered Solutions, Exadata, Exalogic about Oracle's Engineered Systems, parallel hardware and software; Exalytics, Big Data Appliance & Enterprise Manager. Oracle OpenWorld III, OMN Part 3 OPENWORLD III: HW with John Abel, Storage with Luc Gheysens Gaye Hudson and Steve Walker talk to John Abel, Chief Technology Architect, Oracle Server and Storage, EMEA about SPARC SuperCluster and T4; and to Luc Gheysens, Senior Director, Storage Sales Specialist, EMEA about ZFS Storage and Pillar Axiom 600. Oracle OpenWorld IV, OMN Part 4 OPENWORLD IV: Oracle Fusion Applications with Noel ColoeGaye Hudson, VP Corporate Communications, EMEA talks to Noel Coloe, Head of Western Europe Applications Sales Development about Oracle Fusion Applications, a new paradigm in Enterprise applications.

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• Unable to access ubuntu through windows boot manager

  - by Arvind

  I am having an ASUS K55VM....it came with DOS....to this Windows 7 was installed...now i am planned to add another OS ie Ubuntu...my computer had 4 partitions of 240GB 230GB 230GB and 230GB....i changed this to 5 parts....243GB 230GB 230GB 150GB and an 80GB...i installed Ubuntu 12.04 to the 80GB partition through a USB flash drive....it installed fine...however the problem is during the Boot option in Windows Boot manager when i choose Ubuntu...this what is displayed... Windows failed to start. A recent hardware or software change might be the cause. To fix the problem: 1.Insert your Windows installation disc and restart your computer. 2.Choose your language settings, and then click "Next." 3.Click "Repair your computer." If you do not have this disc, contact your system administrator or computer manufacturer for assistance. File: \ubuntu\winboot\wubildr.mbr Status: 0xc000000e Info: The selected entry could not be loaded because the application is missing or corrupt. I tried to change the boot option for the OS and made Ubuntu as my first option....It worked...however windows 7 does not show up in GRUB....in this fear i did the following: Restarted my pc changed boot option 1 to windows. Formatted the drive to which Ubuntu was installed(80GB one)through windows. Restarted again. The problem persists....Windows boot manager shows Ubuntu still and when i choose this it gives two lines one like: grub rescue....but my windows 7 is working perfectly fine. Now want a solution to remove Ubuntu from the windows boot option and reinstall completely...

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• Why are SW engineering interviews disproportionately difficult?

  - by stackoverflowuser2010

  First, some background on me. I have a PhD in CS and have had jobs both as a software engineer and as an R&D research scientist, both at Very Large Corporations You Know Very Well. I recently changed jobs and interviewed for both types of jobs (as I have done in the past). My observation: SW engineer job interviews are way, way disproportionately more difficult than CS researcher job interviews, but the researcher job is higher paying, more competitive, more rewarding, more interesting, and has a higher upside. Here's a typical interview loop for researcher: Phone interview to see if my research is in alignment with the lab's researcher In-person, give presentation on my recent research for one hour (which represents maybe 9 month's worth of work), answer questions In-person one-on-one interviews with about 5 researchers, where they ask me very reasonable questions on my work/publications/patents, including: technical questions, where my work fits into related work, and how I can extend my work to new areas Here's a typical interview loop for SW engineer: Phone interview where I'm asked algorithm questions and maybe do some coding. Pretty standard. In-person interviews at the whiteboard where they drill the F*** out of you on esoteric C++ minutia (e.g. how does a polymorphic virtual function call work), algorithms (make all-pairs-shortest-path algorithm work for 1B vertices), system design (design a database load balancer), etc. This goes on for six or seven interviews. Ridiculous. Why would anyone be willing to put up with this? What is the point of asking about C++ trivia or writing code to prove yourself? Why not make the SE interview more like the researcher interview where you give a talk about what you've done? How are technical job interviews for other fields, like physics, chemistry, civil engineering, mechanical engineering?

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• SharePoint 2007 / 2010 Content Indexing &ldquo;The file reached the maximum download limit. Check that the full text of the document can be meaningfully crawled.&rdquo;

  - by Stacy Vicknair

  If you have large files in a content source that is being indexed by Sharepoint you might run into the following error message: “The file reached the maximum download limit. Check that the full text of the document can be meaningfully crawled.” This is usually caused because SharePoint’s MaxDownloadSize setting is set lower than the size of the file you are attempting to index. You can increase this value, restart the service then kick off a full crawl in order to fix this issue, but SharePoint 2007 and 2010 have different methods for accomplishing this task.   Sharepoint 2007 Open up the Registry editor and increase the MaxDownloadSize value to a number (in MB) higher than the largest file being indexed. You can find this at: HKEY_LOCAL_MACHINE\Software\Microsoft\Search\1.0\Gathering Manager After you increase the size, cycle the search service and kick off a full crawl of the content source in question.   Sharepoint 2010 With SharePoint 2010 you can use PowerShell via the Sharepoint 2010 Console in order to change the MaxDownloadSize. Execute the following commands to update the value: 1: $ssa = Get-SPEnterpriseSearchServiceApplication 2: $ssa.SetProperty(“MaxDownloadSize”, <new size in MB>) 3: $ssa.Update()   References: http://support.microsoft.com/kb/287231 http://blogs.technet.com/b/brent/archive/2010/07/19/sharepoint-server-2010-maxdownloadsize-and-maxgrowfactor.aspx   Technorati Tags: SharePoint,WSS,MaxDownloadSize,Search

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• High-Level Application Architecture Question

  - by Jesse Bunch

  So I'm really wanting to improve how I architect the software I code. I want to focus on maintainability and clean code. As you might guess, I've been reading a lot of resources on this topic and all it's doing is making it harder for me to settle on an architecture because I can never tell if my design is the one that the more experienced programmer would've chosen. So I have these requirements: I should connect to one vendor and download form submissions from their API. We'll call them the CompanyA. I should then map those submissions to a schema fit for submitting to another vendor for integration with the email service provider. We'll call them the CompanyB. I should then submit those responses to the ESP (CompanyB) and then instruct the ESP to send that submitter an email. So basically, I'm copying data from one web service to another and then performing an action at the latter web service. I've identified a couple high-level services: The service that downloads data from CompanyA. I called this the CompanyAIntegrator. The service that submits the data to CompanyB. I called this CompanyBIntegrator. So my questions are these: Is this a good design? I've tried to separate the concerns and am planning to use the facade pattern to make the integrators interchangeable if the vendors change in the future. Are my naming conventions accurate and meaningful to you (who knows nothing specific of the project)? Now that I have these services, where should I do the work of taking output from the CompanyAIntegrator and getting it in the format for input to the CompanyBIntegrator? Is this OK to be done in main()? Do you have any general pointers on how you'd code something like this? I imagine this scenario is common to us engineers---especially those working in agencies. Thanks for any help you can give. Learning how to architect well is really mind-cluttering.

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• How to enable Unity 3D support in 12.04 using open-source drivers for RadeonHD cards?

  - by martin

  As the title says I can't enable the Unity 3D support when I'm using open-source drivers (xorg-edgers). I have an xfx Radeon HD 6950 by the way. If I install the proprietary 12.3 drivers from AMD it works, but I get poorer 2D performance than the open-source drivers and also I get some freezes and lock ups at random. So because of this I'm trying the open-source drivers and so far no issues at all, except this one. Running this command $ /usr/lib/nux/unity_support_test -p shows this: OpenGL vendor string: VMware, Inc. OpenGL renderer string: Gallium 0.4 on llvmpipe (LLVM 0x300) OpenGL version string: 2.1 Mesa 8.0.2 Not software rendered: no Not blacklisted: yes GLX fbconfig: yes GLX texture from pixmap: yes GL npot or rect textures: yes GL vertex program: yes GL fragment program: yes GL vertex buffer object: yes GL framebuffer object: yes GL version is 1.4+: yes Unity 3D supported: no And this command $ lspci -nn | grep VGA shows: 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Cayman PRO [Radeon HD 6950] [1002:6719] So, is this normal? Do I need to go back to proprietary drivers to enable Unity 3D? If anyone can give me help, I'll much appreciate it.

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• Alternatives to Professional Version Control

  - by greengit

  We're teaming up with some non programmers (writers) who need to contribute to one of our projects. Now they just don't like the idea of using Git (or anything for that matter) for version controlling their work. I think this is because they just don't find it worthwhile to wrap their heads around the twisted concepts of version control. (when I first introduced them to branching and merging -- they looked like I was offending them.) Now, we're not in a position to educate them or convince them to use it. We're just trying to find alternatives so that we get all their work versioned (which is what we need) -- and they get easy workflow and concentrate on what they do. I have come up with some ideas... tell them to save their work as a separate file every time they make some non-trivial change, and then use a diff on our side to just track changes. write a program (in Python) that implements the "milestones" in CSSEdit in some way. About the project: It is a natural language processing system (written in C + Python). We've hired some writers to prepare inputs for the system in different languages. And as we evolve the software, we'd need those writers to make changes to their inputs (articles). Sometimes the changes are very small (a word or two), and other times big. The reason we need to version control those changes is because every small/big change in the input has the potential to change the system's output dramatically.

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• How to configure a MInimal Ubuntu installation?

  - by Uri Herrera

  I recently re installed Ubuntu using the mini.iso, but much to my dismay the mini.iso is not configured the same way as the Ubuntu desktop ISO some "problems" I'm facing such as: An Installation using the regular Ubuntu CD recognizes my active network connections in Network Manager, Installing with the mini.iso gives me a working connection however no connections are "active" in Network Manager displaying the message "The system network services are not compatible with this version." In a regular Ubuntu install connecting an Android phone to the PC mounts the phone's internal memory and sd card if present, Using the mini.iso the phone is detected as it appears with the command lsusb but it's not mounted and can't be mounted. In the same regards using the phone to tether it's connection to the PC via USB, the phone is connected to my (wifi) IN the regular Ubuntu install the phone is recognized as a networking device and is used as connection usb0, while in the mini.iso nothing happens, and trying to add the connection to /etc/network/interfaces results in the OS crashing. Just to make sure It wasn't a matter of my user not having the correct permissions or a lack of "groups", I've checked with an Ubuntu VM and the groups are the same, the networking files are the same, and the packages (except those of ubuntu-desktop such as Unity, Firefox, LibreOffice, and other non-essential software) are Installed in my PC, so what else is there to look for?. I'm sure I'm missing something, and I'd prefer not to install Ubuntu again, using the regular cd. How can I manage to get the same behaviour/configuration without reinstalling ?

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• Sweden: Hot Java in the Winter

  - by Tori Wieldt

  No, it's not global warming, but for some reason Sweden is a hotbed of great Java developers and great Java conferences in the winter. First, all three Swedish Java Champions are on Computer Sweden's 100 Best Swedish Developers List. You can read the full Sweden's Top 100 Developers article *if* you can read Swedish (or want to use Google Translate). Congratulations to:  Jonas Bonér, CTO Typesafe Skills: In recent years worked with solutions for scalability and availability. Previously, most between programs and compilers. Other qualifications: Located behind the framework Aspectwerkz and Akka platform for developing parallel, scalable and fault-tolerant software in Scala and Java. Rickard Oberg, Neo Technology Skills: Java, and the framework in Java EE and graph databases. Other qualifications: Founder of open source projects Xdoclet and Webwork. The latter is now called Struts second Rickard Oberg wrote the basics of the application server JBoss. Founder of Senselogic and architect of CMS and portal product SiteVision. Launched frameworkQi4j. Been a speaker at Java Zone JavaPolis, Jfokus, Øredev. Mattias Karlsson Skills: Java. Good at agile system development methods and architecture. Activity: telecom, banking, finance and insurance. Other qualifications: Runs Javaforum Stockholm. Arranges the conference Jfokus.  Frequent speaker at major international conferences such as JavaOne. Holds the title Java Champion. Also, Sweden is home to some top-notch Java Developer conferences during the Winter: jDays Gothenburg, Sweden, Dec 3-5. jDays, a dynamic Java developer conference, comes to Gothenburg. In addition to conference and presentations, visitors can join any courses in Java and related technologies for free.  Jfokus Stockholm, Sweden, Feb 4-6. Jfokus is the largest annual conference for everyone who works with Java in Sweden. The conference is arranged together with Javaforum, the Stockholm JUG.  Thanks to all the Java community who keep the Java hot in Sweden!

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• Extreme Optimization Numerical Libraries for .NET – Part 1 of n

  - by JoshReuben

  While many of my colleagues are fascinated in constructing the ultimate ViewModel or ServiceBus, I feel that this kind of plumbing code is re-invented far too many times – at some point in the near future, it will be out of the box standard infra. How many times have you been to a customer site and built a different variation of the same kind of code frameworks? How many times can you abstract Prism or reliable and discoverable WCF communication? As the bar is raised for whats bundled with the framework and more tasks become declarative, automated and configurable, Information Systems will expose a higher level of abstraction, forcing software engineers to focus on more advanced computer science and algorithmic tasks. I've spent the better half of the past decade building skills in .NET and expanding my mathematical horizons by working through the Schaums guides. In this series I am going to examine how these skillsets come together in the implementation provided by ExtremeOptimization. Download the trial version here: http://www.extremeoptimization.com/downloads.aspx Overview The library implements a set of algorithms for: linear algebra, complex numbers, numerical integration and differentiation, solving equations, optimization, random numbers, regression, ANOVA, statistical distributions, hypothesis tests. EONumLib combines three libraries in one - organized in a consistent namespace hierarchy. Mathematics Library - Extreme.Mathematics namespace Vector and Matrix Library - Extreme.Mathematics.LinearAlgebra namespace Statistics Library - Extreme.Statistics namespace System Requirements -.NET framework 4.0  Mathematics Library The classes are organized into the following namespace hierarchy: Extreme.Mathematics – common data types, exception types, and delegates. Extreme.Mathematics.Calculus - numerical integration and differentiation of functions. Extreme.Mathematics.Curves - points, lines and curves, including polynomials and Chebyshev approximations. curve fitting and interpolation. Extreme.Mathematics.Generic - generic arithmetic & linear algebra. Extreme.Mathematics.EquationSolvers - root finding algorithms. Extreme.Mathematics.LinearAlgebra - vectors , matrices , matrix decompositions, solvers for simultaneous linear equations and least squares. Extreme.Mathematics.Optimization – multi-d function optimization + linear programming. Extreme.Mathematics.SignalProcessing - one and two-dimensional discrete Fourier transforms. Extreme.Mathematics.SpecialFunctions

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