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• Ubuntu 13.10 install ISO crashes on VirtualBox Mac 4.3

  - by John Allsup

  Does anybody know what to do about this? Machine is a 2008 Core 2 Duo iMac with 4GB RAM. (And 64bit Debian 7 boots OK, but I've not tried installing under the latest version of VirtualBox as I have just upgraded VBox today.) VirtualBox 4.3, upon trying to boot a machine with the Ubuntu 13.10 (64bit) iso (with the VM configured for Ubuntu 64bit) crashes, with the following information: Failed to open a session for the virtual machine Ubuntu64. The VM session was aborted. Result Code: NS_ERROR_FAILURE (0x80004005) Component: SessionMachine Interface: ISession {12f4dcdb-12b2-4ec1-b7cd-ddd9f6c5bf4d} === Head of crash dump is below Process: VirtualBoxVM [716] Path: /Applications/VirtualBox.app/Contents/MacOS/VirtualBoxVM Identifier: VirtualBoxVM Version: ??? (???) Code Type: X86 (Native) Parent Process: VBoxSVC [644] Date/Time: 2013-10-17 22:58:23.679 +0100 OS Version: Mac OS X 10.6.8 (10K549) Report Version: 6 Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x0000000000000040 Crashed Thread: 0 Dispatch queue: com.apple.main-thread Thread 0 Crashed: Dispatch queue: com.apple.main-thread 0 com.apple.CoreFoundation 0x92a25c03 CFSetApplyFunction + 83 1 com.apple.framework.IOKit 0x95557ad4 __IOHIDManagerInitialEnumCallback + 69 2 com.apple.CoreFoundation 0x92a2442b __CFRunLoopDoSources0 + 1563 3 com.apple.CoreFoundation 0x92a21eef __CFRunLoopRun + 1071 4 com.apple.CoreFoundation 0x92a213c4 CFRunLoopRunSpecific + 452 5 com.apple.CoreFoundation 0x92a211f1 CFRunLoopRunInMode + 97 6 com.apple.HIToolbox 0x98eb5e04 RunCurrentEventLoopInMode + 392 7 com.apple.HIToolbox 0x98eb5af5 ReceiveNextEventCommon + 158 8 com.apple.HIToolbox 0x98eb5a3e BlockUntilNextEventMatchingListInMode + 81 9 com.apple.AppKit 0x9971b595 _DPSNextEvent + 847 10 com.apple.AppKit 0x9971add6 -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] + 156 11 com.apple.AppKit 0x996dd1f3 -[NSApplication run] + 821 12 QtGuiVBox 0x019f19e1 QEventDispatcherMac::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 1505 13 QtCoreVBox 0x018083b1 QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) + 65 14 QtCoreVBox 0x018086fa QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) + 170 15 QtGuiVBox 0x01eea9e5 QDialog::exec() + 261 16 VirtualBox.dylib 0x011234b8 TrustedMain + 1108104 17 VirtualBox.dylib 0x01126d68 TrustedMain + 1122616 18 VirtualBox.dylib 0x010fac19 TrustedMain + 942057 19 VirtualBox.dylib 0x010f9b3d TrustedMain + 937741 20 VirtualBox.dylib 0x010f81dd TrustedMain + 931245 21 VirtualBox.dylib 0x010f85b8 TrustedMain + 932232 22 VirtualBox.dylib 0x0109d4f8 TrustedMain + 559304 23 VirtualBox.dylib 0x0101521e TrustedMain + 1518 24 ...virtualbox.app.VirtualBoxVM 0x00002e7e start + 2766 25 ...virtualbox.app.VirtualBoxVM 0x000024b5 start + 261 26 ...virtualbox.app.VirtualBoxVM 0x000023e5 start + 53 ==== And please somebody fix the code so that you can just delimit large blocks of code at the start and the end without indenting every line manually by 4 spaces.

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• Safari 5 certified with EBS Release 12 on Apple Mac OS X 10.5 and 10.6

  - by John Abraham

  Oracle E-Business Suite Release 12 (12.0.4 or higher, and 12.1.2 or higher) is now certified with the Safari 5 browser on the following Apple Mac OS X desktop configurations:Mac OS X 10.5 ("Leopard")Mac OS X 10.5 ("Leopard" version 10.5.6 or higher) along with any other security and Java updates listed in the 'Software Update' program on the MacSafari version 5 (5.0.2 or higher)Apple Java/JRE plugin 5 (1.5.0_13 or higher)Mac OS X 10.6 ("Snow Leopard")Mac OS X 10.6 ("Snow Leopard" version 10.6.3 or higher) along with any other security and Java updates listed in the 'Software Update' program on the Mac.Safari version 5 (5.0.2 or higher)Apple Java/JRE plugin 6 (1.6.0_20 or higher)

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• Oracle UCM Integration with WebCenter

  - by john.brunswick

  Portal deployments always contain some level of content that requires management. Like peanut butter and jelly, the ying and yang, they are inseparable. Unfortunately, unlike peanut butter and jelly content and portals usually require that an extensive amount of work be completed to create a seamless experience for end users who will be serviced by the portal, as well as for users who will be contributing and managing the content. With WebCenter Suite Oracle has understood this need and addressed it by including Universal Content Management (UCM, formerly Stellent) licensing to allow content to be delivered into the portal from a mature, class-leading content management technology. To unlock the most value from this content technology, WebCenter portal technology can leverage a series of integration strategies available through its open standards support, as well as a series of native components to enable content consumption from UCM. This have been done to enable IT teams to reduce solution deployment time and provide quick wins to their business stakeholders. The ongoing cost of ownership for the solution is also greatly reduced through these various integrations. Within this post we will explore various ways in which the content can be Contributed through out of the box interfaces Displayed natively within the portal (configuration) Exposed programmatically (development) The information below showcases how to quickly take advantage of WebCenter's marriage of content and portal technologies, then leverage various programmatic integrations available with UCM.

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• polkit: disable all users except those in group wheel?

  - by John Nash

  Is it possible to do the following using 1 polkit .pkla file? Disable all users except those in the wheel group from using polkit. The users in the wheel group will need to provide the root password when using polkit. /etc/polkit-1/localauthority/50-local.d/wheel-only.pkla [disable all users except the wheel group] Identity=unix-group:wheel Action=* ResultAny=??? ResultInactive=??? ResultActive=??? The following file works but you need to provide all the users in /etc/group: [disable all users except those in the wheel group: root and myuser] Identity=unix-user:daemon;unix-user:bin;unix-user:sys;unix-user:adm;unix-user:tty;unix-user:disk;unix-user:lp;unix-user:mail;unix-user:news;unix-user:uucp;unix-user:man;unix-user:proxy;unix-user:kmem;unix-user:dialout;unix-user:fax;unix-user:voice;unix-user:cdrom;unix-user:floppy;unix-user:tape;unix-user:sudo;unix-user:audio;unix-user:dip;unix-user:www-data;unix-user:backup;unix-user:operator;unix-user:list;unix-user:irc;unix-user:src;unix-user:gnats;unix-user:shadow;unix-user:utmp;unix-user:video;unix-user:sasl;unix-user:plugdev;unix-user:staff;unix-user:games;unix-user:users;unix-user:nogroup;unix-user:libuuid;unix-user:crontab;unix-user:messagebus;unix-user:Debian-exim;unix-user:mlocate;unix-user:avahi;unix-user:netdev;unix-user:bluetooth;unix-user:lpadmin;unix-user:ssl-cert;unix-user:fuse;unix-user:utempter;unix-user:Debian-gdm;unix-user:scanner;unix-user:saned;unix-user:i2c;unix-user:haldaemon;unix-user:powerdev Action=* ResultAny=no ResultInactive=no ResultActive=no

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• How do I generate mipmap .png and model .obj files for LibGDX?

  - by John Murdoch

  I'm playing a bit with LibGDX (OpenGL ES 2.0 wrapper for Android). I found some sample code which used prepared files to load models and mipmap textures for them, e.g., at https://github.com/libgdx/libgdx/blob/master/demos/invaders/gdx-invaders/src/com/badlogic/gdxinvaders/RendererGL20.java it reads .obj file for the model and RGB565 format .png file to apply a mipmapped texture to it. What is the best / easiest way for me to create these files? I understand .obj files are generated by a bunch of tools (I installed Blender, Wings3D and Kerkythea so far), but which ones will be the most user friendly for someone unfamiliar with 3D modelling? But more importantly, how do I produce a .png file with the mipmapped texture? The .png I looked at ( https://github.com/libgdx/libgdx/blob/master/demos/invaders/gdx-invaders/data/ship.png ) seems to include different textures for each of the faces, probably created with some tool. I browsed through the menus for the 3 tools I have installed but didn't find an option to export such a .png file. What am I missing?

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• Frederick .NET User Group April 2010 Meeting

  - by John Blumenauer

  FredNUG is pleased to announce that we have an excellent speaker lined up for April.  On April 20th, we’ll start with pizza and social networking at 6:30 PM.  Then, starting at 7 PM, Dane Morgridge will present “Getting Started with Entity Framework 4” The scheduled agenda is:   6:30 PM - 7:00 PM - Pizza/Social Networking/Announcements 7:00 PM - 8:30 PM - Main Topic: Getting Started with Entity Framework 4 with Dane Morgridge  Main Topic Description:  Getting Started with Entity Framework 4 With .Net 3.5 Microsoft release Linq to Sql and with .Net 3.5 SP1 came the Entity Framework, both powerful ORM tools leveraging Linq technology.   Entity Framework v1, while usable, was definitely lacking some important features and the Entity Framework team delivered with version 4 coming with Visual Studio 2010.  In this session we will look at Entity Framework 4 from the ground level and you will get a solid understanding of it basic principles.  We will also go through all of the new features in Entity Framework 4 and see how far it’s come since the initial release.  If you’ve never taken a look at Entity Framework, now is the time as version 4 is the real deal. Speaker Bio: Dane Morgridge has been a developer for 9+ years and has worked with .Net & C# since the first public beta. His current passions are Entity Framework, WPF, WCF, Silverlight and LINQ. He works mostly with C#, but is also a big fan of whatever new technology he happens to come across. In addition to software development, he is the host of the Community Megaphone Podcast and also enjoys dabbling in graphic design, video special effects and hockey. When not with his family he is usually learning some new technology or working on some side projects. He is currently working as the Development Manager & Architect at Roska Direct in Montgomeryville, PA.  He can be reached through is blog http://geekswithblogs.net/danemorgridge or on Twitter @danemorgridge.  8:30 PM - 8:45 PM – RAFFLE! Please join us and get involved in our .NET developers community!

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• MSMQ messages using HTTP just won't get delivered

  - by John Breakwell

  I'm starting off the blog with a discussion of an unusual problem that has hit a couple of my customers this month. It's not a problem you'd expect to bump into and the solution is potentially painful. Scenario You want to make use of the HTTP protocol to send MSMQ messages from one machine to another. You have installed HTTP support for MSMQ and have addressed your messages correctly but they will not leave the outgoing queue. There is no configuration for HTTP support - setup has already done all that for you (although you may want to check the most recent "Installation of the MSMQ HTTP Support Subcomponent" section of MSMQINST.LOG to see if anything DID go wrong) - so you can't tweak anything. Restarting services and servers makes no difference - the messages just will not get delivered. The problem is documented and resolved by Knowledgebase article 916699 "The message may not be delivered when you use the HTTP protocol to send a message to a server that is running Message Queuing 3.0". It is unlikely that you would be able to resolve the problem without the assistance of PSS because there are no messages that can be seen to assist you and only access to the source code exposes the root cause. As this communication is over HTTP, the IIS logs would be a good place to start. POST entries are logged which show that connectivity is working and message delivery is being attempted: #Software: Microsoft Internet Information Services 6.0 #Version: 1.0 #Date: 2006-09-12 12:11:29 #Fields: date time s-sitename s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status 2006-09-12 12:12:12 W3SVC1 10.1.17.219 POST /msmq/private$/test - 80 - 10.2.200.3 - 200 0 0 If you capture the traffic with Network Monitor you can see the POST being sent to the server but you also see a response being returned to the client: HTTP: Response to Client; HTTP/1.1; Status Code = 500 - Internal Server Error "Internal Server Error" means we can probably stop looking at IIS and instead focus on the Message Queuing ISAPI extension (Mqise.dll). MSMQ 3.0 (Windows XP and Windows Server 2003) comes with error logging enabled by default but the log files are in binary format - MSMQ 2.0 generated logging in plain text. The symbolic information needed for formatting the files is not currently publicly available so log files have to be sent in to Microsoft PSS.  Although this does mean raising a support case, formatting the log files to text and returning them to the customer shouldn't take long. Obviously the engineer analyses them for you - I just want to point out that you can see the logging output in text format if you want it. The important entries in the log for this problem are: [7]b48.928 09/12/2006-13:20:44.552 [mqise GetNetBiosNameFromIPAddr] ERROR:Failed to get the NetBios name from the DNS name, error = 0xea [7]b48.928 09/12/2006-13:20:44.552 [mqise RPCToServer] ERROR:RPC call R_ProcessHTTPRequest failed, error code = 1702(RPC_S_INVALID_BINDING) which allow a Microsoft escalation engineer to check the MQISE source code to see what is going wrong. This problem according to the article occurs when the extension tries to bind to the local MSMQ service after the extension receives a POST request that contains an MSMQ message. MSMQ resolves the server name by using the DNS host name but the extension cannot bind to the service because the buffer that MSMQ uses to resolve the server name is too small - server names that are exactly 15 characters long will not fit. RPC exception 0x6a6 (RPC_S_INVALID_BINDING) occurs in the W3wp.exe process but the exception is handled and so you do not receive an error message. The workaround is to rename the MSMQ server to something less than 15 characters. If the problem has only just been noticed in a production environment - an application may have been modified to get through a newly-implemented firewall, for example - then renaming is going to be an issue. Other applications may need to be reinstalled or modified if server names are hard-coded or stored in the registry. The renaming may also break a company naming convention where the name is built up from something like location+department+number. If you want to learn more about MSMQ logging then check out Chapter 15 of the MSMQ FAQ. In fact, even if you DON'T want to learn anything about MSMQ logging you should read the FAQ anyway as there is a huge amount of useful information on known issues and the like.

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• Step by Step Install of MAAS and JUJU

  - by John S

  I am working on understanding the pieces that I am missing in being able to deploy Juju across the other MAAS nodes. I don't know If I have a step out of place, or missing a few. The server owns the router which handles the DHCP and DNS. Any assistance is greatly appreciated. When I am at the end I will either get a 409 error, or arbitrary pick tools 1.16.0 error. It is worth mentioning that local, and aws works fine. Hopefully with all of these steps spelled out it will help someone else along the way too. Steps Setting Up MAAS and JUJU - 12.04 LTS Clean install SSH only from the package selection during install sudo apt-get install software-properties-common sudo apt-get install python-software-properties sudo add-apt-repository ppa:maas-maintainers/stable sudo add-apt-repository ppa:juju/stable sudo apt-get update sudo apt-get dist-upgrade sudo reboot sudo apt-get install maas maas-dns maas-dhcp sudo ufw disable sudo reboot - edit /etc/dhcp/dhcpd.conf authoritive subnet 10.0.0.0 netmask 255.255.255.0 { next-server 10.0.0.2; filename "pxelinux.0"; } sudo maas createsuperuser sudo maas-import-pxe-files Login to MAAS http://10.x.x.x/MAAS cluster controller configuration for eth0 manage dhcp and dns IP 10.0.0.2 subnet 255.255.255.0 broadcast 10.0.0.0 routerip 10.0.0.1 ip low 10.0.0.5 ip high 10.0.0.180 Commissioning default and distro is set at 12.04 default domain is at local sudo maas-cli login maas http://10.x.x.x/MAAS/api/1.0 api-key ssh-keygen -t rsa -b 2048 - enter - no password - cat id_rsa.pub and enter key into MAAS ssh sudo maas-cli maas nodes accept-all (interestingly enough I only get back [] when executing this ) PXE one machine, accept and commision, start and deploy. sudo apt-get install juju-core juju-local MAAS config: maas: type: maas maas-server: '://10.x.x.x:80/MAAS' maas-oauth: 'MAAS_API_KEY' admin-secret: 'nothing' default-series: 'precise' juju switch maas sudo juju bootstrap --show-log

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• What does "[IN-USE] account is locked by another session or for maintenance, try again." mean?

  - by John

  I'm in the process of migrating a computer from Windows To Ubuntu. I followed these instructions to move my Thunderbird emails over. The emails that I moved show up, but when I try to check for new emails I get this message: Sending of password did not succeed. Mail server pop.windstream.net responded: [IN-USE] account is locked by another session or for maintenance, try again. I click OK and another box pops up saying: Login to server pop.windstream.net failed. With 3 options: "Enter new password" (I'm SURE the one I'm typing is correct) "Cancel" "Retry" I've tried all 3. Retyping my password, clicking "Retry", same result. While I was typing this, I got a toast that said: Thunderbird's attempt to connect to pop.windstream.net has timed out. What is causing this and how can I fix it?

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• WebCenter Spaces 11g - UI Customization

  - by john.brunswick

  When developing on top of a portal platform to support an intranet or extranet, a portion of the development time is spent adjusting the out-of-box user templates to adjust the look and feel of the platform for your organization. Generally your deployment will not need to look like anything like the sites posted on http://cssremix.com/ or http://www.webcreme.com/, but will meet business needs by adjusting basic elements like navigation, color palate and logo placement. After spending some time doing custom UI development with WebCenter Spaces 11G I have gathered a few tips that I hope can help to speed anyone's efforts to quickly "skin" a WebCenter Spaces deployment. A detailed white paper was released that outlines a technique to quickly update the UI during runtime - http://www.oracle.com/technology/products/webcenter/pdf/owcs_r11120_cust_skins_runtime_wp.pdf. Customizing at "runtime" means using CSS and images to adjust the page layout and feel, which when creatively done can change the pages drastically. WebCenter also allows for detailed templates to manage the placement of major page elements like menus, sidebar, etc, but by adjusting only images and CSS we can end up with something like the custom solution shown below. view large image Let's dive right in and take a look at some tools to make our efforts more efficient.

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• External Monitors shut off when Laptop Lid closes

  - by John Lanz

  I have researched the solution... gconftool-2 --type string --set /apps/gnome-power-manager/buttons/lid_ac "nothing" does not fix it. I have two external monitors and when I close my lid the settings are reset and the laptop's monitor is set to the default. Thanks! gsettings list-recursively org.gnome.settings-daemon.plugins.power org.gnome.settings-daemon.plugins.power active true org.gnome.settings-daemon.plugins.power button-hibernate 'nothing' org.gnome.settings-daemon.plugins.power button-power 'nothing' org.gnome.settings-daemon.plugins.power button-sleep 'nothing' org.gnome.settings-daemon.plugins.power button-suspend 'nothing' org.gnome.settings-daemon.plugins.power critical-battery-action 'suspend' org.gnome.settings-daemon.plugins.power idle-brightness 30 org.gnome.settings-daemon.plugins.power idle-dim-ac false org.gnome.settings-daemon.plugins.power idle-dim-battery true org.gnome.settings-daemon.plugins.power idle-dim-time 10 org.gnome.settings-daemon.plugins.power lid-close-ac-action 'nothing' org.gnome.settings-daemon.plugins.power lid-close-battery-action 'nothing' org.gnome.settings-daemon.plugins.power notify-perhaps-recall true org.gnome.settings-daemon.plugins.power percentage-action 2 org.gnome.settings-daemon.plugins.power percentage-critical 3 org.gnome.settings-daemon.plugins.power percentage-low 10 org.gnome.settings-daemon.plugins.power priority 1 org.gnome.settings-daemon.plugins.power sleep-display-ac 600 org.gnome.settings-daemon.plugins.power sleep-display-battery 600 org.gnome.settings-daemon.plugins.power sleep-inactive-ac false org.gnome.settings-daemon.plugins.power sleep-inactive-ac-timeout 0 org.gnome.settings-daemon.plugins.power sleep-inactive-ac-type 'suspend' org.gnome.settings-daemon.plugins.power sleep-inactive-battery true org.gnome.settings-daemon.plugins.power sleep-inactive-battery-timeout 0 org.gnome.settings-daemon.plugins.power sleep-inactive-battery-type 'suspend' org.gnome.settings-daemon.plugins.power time-action 120 org.gnome.settings-daemon.plugins.power time-critical 300 org.gnome.settings-daemon.plugins.power time-low 1200 org.gnome.settings-daemon.plugins.power use-time-for-policy true

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• Webcast Replay: Upgrading to Oracle Database 11g with Tom Kyte

  - by john.brust

  On Friday, we caught up with Tom Kyte, Oracle database expert and host of AskTom.oracle.com. Join us to hear what Oracle Database 11g Release 2 means to Tom. Learn how you can make 'change' safe and benefit from new functionality to make better use of your standby databases, capture and replay workloads, tune SQL performance, flashback for rapid recovery from human error, and more. Click to view webcast (and Q&A) replay. We also invite you to visit us our Oracle Database 11g upgrade page on otn.oracle.com.

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• Microsoft Templates included in jQuery 1.5!

  - by Stephen Walther

  When I joined the ASP.NET team as the Program Manager for Ajax, the ASP.NET team was working on releasing a new version of the Microsoft Ajax Library. This new version of the Microsoft Ajax Library had several really innovative and unique features such as support for client templates, client data-binding, script dependency management, and globalization. However, we kept hearing the message that our customers wanted to use jQuery when building ASP.NET applications. Therefore, about ten months ago, we decided to pursue a risky strategy. Scott Guthrie sent me to Cambridge to meet with John Resig – the creator of jQuery and leader of the jQuery project – to find out whether Microsoft and jQuery could work together. We wanted to find out whether the jQuery project would be open to allowing Microsoft to contribute the innovative features that we were developing for the Microsoft Ajax Library -- such as client templates and client data-binding -- to the jQuery library. Fortunately, the Cambridge meeting with Resig went well. John Resig was very open to accepting contributions to the jQuery library. Over the next few months, we worked out a process for Microsoft to contribute new features to the open-source jQuery project. Resig and Guthrie appeared on stage at the MIX10 conference to announce that Microsoft would be contributing features to jQuery. It has been a long journey, but I am happy to report success. Today, Microsoft and the jQuery project have announced that three plugins developed by developers on the ASP.NET team – the jQuery Templates, jQuery Data Link, and jQuery Globalization plugins – have been accepted as official jQuery plugins. In addition, the jQuery Templates plugin will be integrated into jQuery 1.5 which is the next major release of jQuery. You can learn more about the plugins by watching the following Web Camps TV episode hosted by James Senior with Stephen Walther: Web Camps TV #5 - Microsoft Commits Code to jQuery! You can read Scott Guthrie’s blog announcement here: http://weblogs.asp.net/scottgu/archive/2010/10/04/jquery-templates-data-link-and-globalization-accepted-as-official-jquery-plugins.aspx You can read the jQuery team’s announcement here: http://blog.jquery.com/2010/10/04/new-official-jquery-plugins-provide-templating-data-linking-and-globalization/ I wrote the original proposal for the jQuery Templates plugin. Dave Reed and Boris Moore were the ASP.NET developers responsible for actually writing the plugin (with lots of input from the jQuery team and the jQuery community). Boris has written a great set of tutorials on the Templates plugin. The first tutorial in his series is located here: http://www.borismoore.com/2010/09/introducing-jquery-templates-1-first.html I want to thank John Resig, Richard Worth, Scott Gonzalez, Rey Bango, Jorn Zaefferer, Karl Swedberg and all of the other members of the jQuery team for working with the ASP.NET team and accepting our contributions to the jQuery project.

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• When a restore isn’t really complete

  - by John Paul Cook

  This week I discovered that restoring from a full backup doesn’t always restore SQL Server to the same state it was in when the backup was made. There are three settings that, if enabled, are not restored after a database restore. Thanks to Greg Low for pointing out that the list of affected settings is found in the SQL Server 2008 Upgrade Technical Reference Guide from which I quote: · is_broker_enabled · is_honor_broker_priority_on · is_trustworthy_on Detaching and attaching a database will also...(read more)

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• Your thoughts on Best Practices for Scientific Computing?

  - by John Smith

  A recent paper by Wilson et al (2014) pointed out 24 Best Practices for scientific programming. It's worth to have a look. I would like to hear opinions about these points from experienced programmers in scientific data analysis. Do you think these advices are helpful and practical? Or are they good only in an ideal world? Wilson G, Aruliah DA, Brown CT, Chue Hong NP, Davis M, Guy RT, Haddock SHD, Huff KD, Mitchell IM, Plumbley MD, Waugh B, White EP, Wilson P (2014) Best Practices for Scientific Computing. PLoS Biol 12:e1001745. http://www.plosbiology.org/article/info%3Adoi%2F10.1371%2Fjournal.pbio.1001745 Box 1. Summary of Best Practices Write programs for people, not computers. (a) A program should not require its readers to hold more than a handful of facts in memory at once. (b) Make names consistent, distinctive, and meaningful. (c) Make code style and formatting consistent. Let the computer do the work. (a) Make the computer repeat tasks. (b) Save recent commands in a file for re-use. (c) Use a build tool to automate workflows. Make incremental changes. (a) Work in small steps with frequent feedback and course correction. (b) Use a version control system. (c) Put everything that has been created manually in version control. Don’t repeat yourself (or others). (a) Every piece of data must have a single authoritative representation in the system. (b) Modularize code rather than copying and pasting. (c) Re-use code instead of rewriting it. Plan for mistakes. (a) Add assertions to programs to check their operation. (b) Use an off-the-shelf unit testing library. (c) Turn bugs into test cases. (d) Use a symbolic debugger. Optimize software only after it works correctly. (a) Use a profiler to identify bottlenecks. (b) Write code in the highest-level language possible. Document design and purpose, not mechanics. (a) Document interfaces and reasons, not implementations. (b) Refactor code in preference to explaining how it works. (c) Embed the documentation for a piece of software in that software. Collaborate. (a) Use pre-merge code reviews. (b) Use pair programming when bringing someone new up to speed and when tackling particularly tricky problems. (c) Use an issue tracking tool. I'm relatively new to serious programming for scientific data analysis. When I tried to write code for pilot analyses of some of my data last year, I encountered tremendous amount of bugs both in my code and data. Bugs and errors had been around me all the time, but this time it was somewhat overwhelming. I managed to crunch the numbers at last, but I thought I couldn't put up with this mess any longer. Some actions must be taken. Without a sophisticated guide like the article above, I started to adopt "defensive style" of programming since then. A book titled "The Art of Readable Code" helped me a lot. I deployed meticulous input validations or assertions for every function, renamed a lot of variables and functions for better readability, and extracted many subroutines as reusable functions. Recently, I introduced Git and SourceTree for version control. At the moment, because my co-workers are much more reluctant about these issues, the collaboration practices (8a,b,c) have not been introduced. Actually, as the authors admitted, because all of these practices take some amount of time and effort to introduce, it may be generally hard to persuade your reluctant collaborators to comply them. I think I'm asking your opinions because I still suffer from many bugs despite all my effort on many of these practices. Bug fix may be, or should be, faster than before, but I couldn't really measure the improvement. Moreover, much of my time has been invested on defence, meaning that I haven't actually done much data analysis (offence) these days. Where is the point I should stop at in terms of productivity? I've already deployed: 1a,b,c, 2a, 3a,b,c, 4b,c, 5a,d, 6a,b, 7a,7b I'm about to have a go at: 5b,c Not yet: 2b,c, 4a, 7c, 8a,b,c (I could not really see the advantage of using GNU make (2c) for my purpose. Could anyone tell me how it helps my work with MATLAB?)

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• If You Could Cut Your Meeting Times in ½ Would You?

  - by [email protected]

  By Brian Dayton on April 22, 2010 2:02 PM I know it sounds like a big promise. And what I'm thinking about may not cut a :60 minute meeting into :30 minutes, but it could make meetings and interactions up to 2X more productive. How? Social Media for the Enterprise, Not Social Media In the Enterprise Bear with me. I'm not talking about whether or not workers should or shouldn't have access to Facebook on corporate networks. That topic has been discussed @ length. I'm also not talking about the direct benefits of Social Networking tools like Presence (the ability to see someone online and ask a question in real-time), blogs, RSS feeds or external tools like Twitter. The Un-Measurable Benefits Would you do something that you believe will have a positive effect--but can't be measured? It's impossible to quantify the effectiveness of a meeting. However, what I am talking about would be more of a byproduct of all of the social networking tools above. Here's the hypothesis: As I've gotten more and more busy with work, family, travel and kids--and the same has happened to my friends and family--I'm less and less connected. But by introducing Facebook to my life I've not only made connections with longtime friends whom I haven't spoken to in years--but I've increased the pace and quality of interactions, on and offline, with close friends who I see and speak to every week. In some cases it even enhances the connections and interactions with those I see or speak to every day. The same holds true in an organization. Especially a larger one with highly matrixed organizational structures. You work with people on a project, new people come in with each different project and a disproportionate amount of time is spent getting oriented and staying current. Going back to the initial value proposition--making meetings shorter/more effective--a large amount of time is spent: - At Project Kick-off: Meeting and understanding team member's histories, goals & roles - Ongoing: Summarizing events since the last meeting or update email In my personal, Facebook life today I know that: - My best friend from college - has been stranded in India for 5 days because of the volcano in Iceland and is now only 250 miles from home - One of my co-workers started conference calls at 6:30 this morning - My wife wasn't terribly pleased with my painting skills in our new bathroom (disclosure: she told me this face to face too) Strengthening Weak Links A recent article in CIO Magazine, Three Dangerous Social Media Misconceptions (Kristen Burnham, March 12, 2010) calls out the #1 misconception as follows: 1. "Face-to-face relationships are far more valuable than virtual ones." While some level of physical interaction will always add value to relationships, Gartner says that come 2020, most relationships and teams will be based on "weak links"--that is, you may not have personally met a contact, but you'll know of or may have interacted with him via social sites like Facebook, LinkedIn and Twitter. The sooner your enterprise adopts these tools, the sooner your employees will learn them, and the sooner you'll begin to cultivate these relationships-of-the-future. I personally believe that it's not an either/or choice between face-to-face and virtual interactions. In fact, I'll be as bold as saying it doesn't matter. I can point to two extremely valuable work relationships that I've had over the past 5 years: - I shared an office with one of them - I met the other person, face-to-face, only once Both relationships were very productive. The dynamics were similar. The communication tactics differed immensely. What does matter is the quality, frequency and relevance of interactions. Still sound like too much? An over-promise? Stay tuned for my next post The Gap Between Facebook and LinkedIn. I'll also connect some of the dots with where Oracle Applications and technologies are headed.

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• What makes a game a game vs something else like a puzzle or a toy?

  - by Shannon John Clark

  Famously the Sims and similar games have been described by some designers as Toys and not "really" games. I'm curious if there is a good answer to what makes something a game. For example many companies sell Sudoku games - EA has an iPhone one, IronSudoku offers a great web based one, and there are countless others on most platforms. Many newspapers publish Sudoku puzzles in their print editions and often online. What differentiates a game from a puzzle? (or are all Sudoku "games" misnamed?) I'm not convinced there is a simple or easy answer - but I'd love to be proven wrong. I've seen some definitions and emphasize "rules" as core to something being a game (vs. "real life") but puzzles have rules as well - as do many other things. I'm open to answers that either focus only on computer games (on any platform) or which expand to include games and gameplay across many platforms. Here to I'm not fully convinced the lines are clear - is a "game" of D&D played over a virtual tabletop with computer dice rollers, video & audio chat a computer game or something else? (I'd lean towards something else - but where do you draw that line?)

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• Silverlight Cream for December 05, 2010 -- #1003

  - by Dave Campbell

  In this (Almost) All-Submittal Issue: John Papa(-2-), Jesse Liberty, Tim Heuer, Dan Wahlin, Markus Egger, Phil Middlemiss, Coding4Fun, Michael Washington, Gill Cleeren, MichaelD!, Colin Eberhardt, Kunal Chowdhury, and Rabeeh Abla. Above the Fold: Silverlight: "Two-Way Binding on TreeView.SelectedItem" Phil Middlemiss WP7: "Taking Screen Shots of Windows Phone 7 Panorama Apps" Markus Egger Training: "Beginners Guide to Visual Studio LightSwitch (Part - 4)" Kunal Chowdhury Shoutouts: Don't let the fire go out... check out the Firestarter Labs Bart Czernicki discusses the need for 64-bit Silverlight: Why a 64-bit runtime for Silverlight 5 Matters Laurent Duveau is interviewed by the SilverlightShow folks to discuss his WP7 app: Laurent Duveau on Morse Code Flash Light WP7 Application From SilverlightCream.com: John Papa: Silverlight 5 Features John Papa has a post up highlighting his take on what's cool in the new featureset for Silverlight 5... including an external link to the keynote. Silverlight Firestarter Keynote and Sessions John Papa also has posted links to all the individual session videos... what a great resource! Yet Another Podcast #17 – Scott Guthrie Jesse Liberty went big with his latest Yet Another Podcast ... he is interviewing Scott Guthrie about the Firestarter, Silverlight, WP7. and more. Silverlight 5 Plans Revealed With this post from Tim Heuer, I find myself adding a Silverlight 5 tag... so bring on the fun! ... unless you've been overloaded like I have since last Thursday, you've probably seen this, but what the heck... Silverlight Firestarter Wrap Up and WCF RIA Services Talk Sample Code Phoenix's own Dan Wahlin had a great WCF RIA Services presentation at the Firestarter last week, and his material and lots of other good links are up on his blog, and I'd say that even if he didn't have a couple shoutouts to me in it :) Thanks Dan!! Taking Screen Shots of Windows Phone 7 Panorama Apps Markus Egger helps us all out with a post on how to get screenshots of your WP7 Panorama app... in case you haven't tried it ... it's not as easy as it sounds! Two-Way Binding on TreeView.SelectedItem Phil Middlemiss is back with a post taking some of the mystery out of the TreeView control bound to a data context and dealing with the SelectedItem property... oh yeah, and throw all that into MVVM! Great tutorial as usual, a cool behavior, and all the source. Native Extensions for Microsoft Silverlight Alan Cobb pointed me to a quick post up on the Coding4Fun site about the NESL (Native Extensions for SilverLight) from Microsoft that give access to some cool features of Windows 7 from Silverlight... I added an NESL tag in case other posts appear on this subject. Silverlight Simple Drag And Drop / Or Browse View Model / MVVM File Upload Control Michael Washington has another great tutorial up at CodeProject that expands on prior work he'd done with drag/drop file upload with this post on integrating an updated browse/upload into ViewModel/MVVM projects, all of which is Blendable. The validation story in Silverlight (Part 1) In good news for all of us, Gill Cleeren has started a tutorial series at SilverlightShow on Silverlight Validation. The first one is up discussing the basics... The Common Framework MichaelD! has a WPF/Silverlight framework up with Facebook Authentication, Xaml-driven IOC, T4 synchronous WCF proxies, and WP7 on the roadmap... source on CodePlex, check it out and give him some feedback. Exploring Reactive Extensions (Rx) through Twitter and Bing Maps Mashups If you've been waiting around to learn Rx, Colin Eberhardt has the post up for you (and me)... great tutorial up on Twitter and Bing Maps Mashups ... and all the code... for the twitter immediate app, and also the UKSnow one we showed last week... check out the demo page, and grab the source! Beginners Guide to Visual Studio LightSwitch (Part - 4) Kunal Chowdhury has the 4th part of his Lightswitch tutorial series up at SilverlightShow. In this one, he shows how to integrate multiple tables into a screen. It is here Take Your Silverlight Application Full Screen & intercept all windows keys !! Rabeeh Abla sent me this link to the blog describing a COM exposed library that intercepts all keys when Silverlight is full-screen. There are a few I hit when I'm going through blogs that Ctrl-W (FF) just won't take down and that annoys me... so this might be a solution if you have that problem... worth a look anyway! Stay in the 'Light! Twitter SilverlightNews | Twitter WynApse | WynApse.com | Tagged Posts | SilverlightCream Join me @ SilverlightCream | Phoenix Silverlight User Group Technorati Tags: Silverlight    Silverlight 3    Silverlight 4    Windows Phone MIX10

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• Change Comes from Within

  - by John K. Hines

  I am in the midst of witnessing a variety of teams moving away from Scrum. Some of them are doing things like replacing Scrum terms with more commonly understood terminology. Mainly they have gone back to using industry standard terms and more traditional processes like the RAPID decision making process. For example: Scrum Master becomes Project Lead. Scrum Team becomes Project Team. Product Owner becomes Stakeholders. I'm actually quite sad to see this happening, but I understand that Scrum is a radical change for most organizations. Teams are slowly but surely moving away from Scrum to a process that non-software engineers can understand and follow. Some could never secure the education or personnel (like a Product Owner) to get the whole team engaged. And many people with decision-making authority do not see the value in Scrum besides task planning and tracking. You see, Scrum cannot be mandated. No one can force a team to be Agile, collaborate, continuously improve, and self-reflect. Agile adoptions must start from a position of mutual trust and willingness to change. And most software teams aren't like that. Here is my personal epiphany from over a year of attempting to promote Agile on a small development team: The desire to embrace Agile methodologies must come from each and every member of the team. If this desire does not exist - if the team is satisfied with its current process, if the team is not motivated to improve, or if the team is afraid of change - the actual demonstration of all the benefits prescribed by Agile and Scrum will take years. I've read some blog posts lately that criticise Scrum for demanding "Big Change Up Front." One's opinion of software methodologies boils down to one's perspective. If you see modern software development as successful, you will advocate for small, incremental changes to how it is done. If you see it as broken, you'll be much more motivated to take risks and try something different. So my question to you is this - is modern software development healthy or in need of dramatic improvement? I can tell you from personal experience that any project that requires exploration, planning, development, stabilisation, and deployment is hard. Trying to make that process better with only a slightly modified approach is a mistake. You will become completely dependent upon the skillset of your team (the only variable you can change). But the difficulty of planned work isn't one of skill. It isn't until you solve the fundamental challenges of communication, collaboration, quality, and efficiency that skill even comes into play. So I advocate for Big Change Up Front. And I advocate for it to happen often until those involved can say, from experience, that it is no longer needed. I hope every engineer has the opportunity to see the benefits of Agile and Scrum on a highly functional team. I'll close with more key learnings that can help with a Scrum adoption: Your leaders must understand Scrum. They must understand software development, its inherent difficulties, and how Scrum helps. If you attempt to adopt Scrum before the understanding is there, your leaders will apply traditional solutions to your problems - often creating more problems. Success should be measured by quality, not revenue. Namely, the value of software to an organization is the revenue it generates minus ongoing support costs. You should identify quality-based metrics that show the effect Agile techniques have on your software. Motivation is everything. I finally understand why so many Agile advocates say you that if you are not on a team using Agile, you should leave and find one. Scrum and especially Agile encompass many elegant solutions to a wide variety of problems. If you are working on a team that has not encountered these problems the the team may never see the value in the solutions.   Having said all that, I'm not giving up on Agile or Scrum. I am convinced it is a better approach for software development. But reality is saying that its adoption is not straightforward and highly subject to disruption. Unless, that is, everyone really, really wants it.

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• How to find web hosting that meets my requirements?

  - by John Conde

  This question is here so we can offer users who are looking for information on how to determine which web hosting solution is right for them. All future questions pertaining to finding web hosting should be closed as a duplicate of this question. As per this meta question. How to find web hosting that meets my requirements? What we're looking for in answers to this question the basics about web hosting: What is web hosting? What is the difference between shared, VPS, and dedicated hosting? How does a content delivery network relate to web hosting? Anything else you feel is helpful in finding a web host. What we do not want is: Endorsements or recommendations for specific web hosts We do not want your experience or other subjective information (just the facts please)

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• Kansas City .NET UG March Meeting &ndash; Tonight!!!!

  - by John Alexander

  Meeting tonight!!! Food! Great giveaways including a full license of Infragistics for a year! See you there!! Meeting for March 23rd, 2010 WHERE: Centriq Training, 8700 State Line Road, Leawood, KS (Click WHEN: 6:00 PM TOPIC: Microsoft's Security Development Lifecycle for Agile development Microsoft recently added secure development guidance for agile methodologies within their SDL. During this presentation, Nick will summarize the new guidance and discuss what makes this guidance successful for Agile development. SPEAKER: Nick Coblentz Nick Coblentz is a senior consultant within AT&T Consulting Services' Application Security Practice. He focuses on helping organizations build mature application security programs and secure development processes. Nick has provided consulting services to fortune 500 companies within the retail, financial services, banking, and health care sectors. SPONSOR: TekSystems TEKsystems® is the leading IT staffing and services company. Our capabilities span a wide range of services: from technical staff augmentation and direct placement services, to full management of IT projects and comprehensive workforce management solutions. With over 25 years of experience, we are experts at connecting technical professionals. Whether you are looking for the best IT talent, an experienced IT outsourcing partner, or a career in the IT industry, TEKsystems delivers.

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• Resources for the &ldquo;What&rsquo;s New in VS 2013&rdquo; Presentation

  - by John Alexander

  Originally posted on: http://geekswithblogs.net/jalexander/archive/2013/10/24/resources-for-the-ldquowhatrsquos-new-in-vs-2013rdquo-presentation.aspxThanks for attending the “What’s New in Visual Studio 2013 (and TFS too) presentation. As promised, here are some links! Note: if you didn’t attend, its ok. This is for you, too. The bits themselves.  This article introduces new and enhanced features in Visual Studio 2013 Visual Studio Virtual Launch – Lots of Videos here and and then on November 13th, live sessions and a q and a session… What features map to what Visual Studio editions Visual Studio 2013 New Editor Features Visual Studio 2013 Application Lifecycle Management Virtual Machine and Hands-on-Labs / Demo Scripts from Brian Keller More on CodeLens from Zain Naboulsi  What are Web Essentials? You can now download Web Essentials for Visual Studio 2013 RTM. A great overview on TFS 2013 from Brian Harry The release archive lists updates made to Team Foundation Service along with which version of Team Foundation Server the updates are a part of. REST API for Team Rooms  “What's new in Visual Studio for Web Developers and Front End Devs” screencasts – quick, easy and painless from the always awesome Scott Hanselman Introducing ASP.NET Identity –-- A membership system for ASP.NET applications Visual Studio 2013 Adds New Project Templates with Improvements and Social Accounts Authentication

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• Silverlight TV 16: Tim Heuer and Jesse Liberty Talk about Silverlight 4 RC at MIX 10

    While at MIX10, John catches up with Jesse Liberty and Tim Heuer to discuss their favorite features in Silverlight 4 on this episode of Silverlight TV. Along with calling out and discussing why they're each impressed with their favorite features, Jesse, Tim, and John also discuss the impact of the announcements made at MIX regarding development for WP7 and Silverlight at the Day 1 keynote. You can also check out the 60+ page whitepaper that covers the full feature list of all the new features...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• How to downgrade Thunderbird 12.04 to Thunderbird 11.01.1 on Ubuntu 10.04.4 LTS

  - by John

  On several Ubuntu 10.04.4 LTS systems I've recently upgraded to Thunderbird 11.01.1 to 12.04 via "apt-get update/upgrade". Now my T-Bird menu's drop off un-expectantly; trying to click on "Get Mail" sometimes fails intermittently; and printing is also intermittent. I did not have these intermittent problems before upgrading. How do I revert Thunderbird to the previous release until the developers fix these issues?

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• I&rsquo;m going to have to stop using MS Virtual PC 2007

  - by John Breakwell

  Originally posted on: http://geekswithblogs.net/Plumbersmate/archive/2013/10/23/irsquom-going-to-have-to-stop-using-ms-virtual-pc.aspxFor many years now I’ve been happily chucking around Windows XP virtual hard disks and loading them with Virtual PC. Sadly I’m going to have to turn to something modern as the virtual processor is no longer up to scratch, as I found when trying to install Windows 8.1 evaluation. In the past this would have been a Blue Screen but they’re handled differently in Windows 8, usually with a frowning emoticon. 0x0000005D means UNSUPPORTED_PROCESSOR and the solution would be to enable No-Execute Memory Protection in the BIOS. Virtual PC is ancient so the AMI BIOS has no such setting on any of the menus. Off now to find a virtualisation product I like.

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