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• Copying files to zfs mountpoint doesn't work - the files aren't actually copied to the other filesystem,

  - by user113904

  I have 3 x 4 TB disks in a NAS that I want to group together and access as if they were one whole 'unit' of some kind. I also have a 250GB disk containing the OS - this is full of films and tv shows currently. I thought zfs sounded good so I created a raidz zpool, after installing the ppa sudo zpool create store raidz /dev/sdb /dev/sdc /dev/sdd and set the mountpoint to /mnt/store sudo zfs set mountpoint=/mnt/store /store checked it was successful - I think it was sudo zfs list NAME USED AVAIL REFER MOUNTPOINT store 266K 7.16T 170K /mnt/store Then I wanted to move over a whole load of files from my home directory. I went to where the to-be-copied folder was (called media) and entered sudo cp -R * /mnt/store cp: cannot create directory `/mnt/store/media': No space left on device It seems like it's not copying over to the new filesystem I made (or thought I did). I've never really done this type of thing until a few days ago so may be running before I can walk... is this not the right way to copy files across? I've only used windows before so the idea of mountpoints is a bit mind boggling. I'm using XBMCbuntu 12 beta 2.0 which is based on 12.04. Will retry with normal Ubuntu 12.04 desktop to see if that's the problem. thanks for the help!

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• ScreenManagement better practices ?! Textbox not focusing

  - by xykudyax

  I saw a question here using DataTemplates with WPF for ScreenManagement, I was curious and I gave it a try I think the ideia is amazing and very clean. Though I'm new to WPF and I read a lot of times that almost everything should be made in XAML and very little should be "coded behind". My questions resolves about using the datatemplate ideia, WHERE should the code that calls the transitions be? where should I define which commands are avaiable in which screens. For example: [ScreenA] Commands: Pressing B - Goes to state B Pressing ESC - Exits [ScreenB] Commands: Pressing A - Goes to state A Pressing SPACE - Exits where do I define the keyEventHandlers? and where do I call the next screen? I'm doing this as an hobby for learning and "if you are learning, better learn it right" :) Thank you for your time. Yes the Q/A I was talking is: What's a good way to handle game screen management in WPF? What I've done so far was to create a Screen class (derived from UserControl) and create some virtual methods: - one for Initializing stuff (like focus a given component by default) - another for inputHandling I handle it by using a switch case and by listening to the PreviewKeyDown event from the parent container (MainWindow) Im not able to do it another way! Help?!. - and a finally one that removes the keyEvent method (when the screen is terminated) Parent.PreviewKeyDown -= OnKeyDown; am I doing okay? I face a problem. When I add a new screen (userControl) containing a TextBox I'm not able to give it autofocus :/ The Caret is there but is not blinking and I have to hit "TAB" before being able to input anything at all :/

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• Our New Website Header (& Other Tweaks)

  - by justin.kestelyn

  Last week, the Oracle Technology Network Website went fixed-width. There are several reasons for this, most relating to providing a consistent user experience, easier management of Website content, etc. Furthermore, it's fairly standard for developer portals these days - java.sun.com, MSDN, and IBM DeveloperWorks are also all fixed-width sites. (My apologies to everyone who is unhappy about this change, but it really is an overall positive one.) Today, we have rolled out a brand-new header, the first step in what we call the "Mosaic" project - which is an effort to make the user experience across all Oracle Websites more consistent. To summarize the impact: The "pull-down" menus on the OTN site disappear; most of them move into a "flyout" button in the header. You can access the OTN flyout from any page on Oracle.com or the OTN site. Great for our page views. :) You also have direct access to the Downloads index from anywhere on Oracle.com. If you so desire, you can directly access product overviews, Oracle University and Support info, Oracle Store, etc etc from the OTN site now. Due to limited space in the flyout we cannot accommodate *all* the pull-down items, but they are all no more than 1 or 2 clicks away. This approach has been validated in extensive user testing over the last few months; I welcome your feedback now in comments. There are many other changes in train, with the next one being: A major homepage redesign, the first in 4 or 5 years.

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• Discovering path through unknown territory

  - by TravisG

  Let's say all the AI knows about it's surroundings is a pixel-map that it has which clearly shows walkable terrain and obstacles. I want the AI to be able to traverse this terrain until it finds an exit point. There are some restrictions: There is always a way to the exit in the entire map that the AI walks around in, but there may be dead ends. The path to the exit is always pretty random, meaning that if you stand at crossroads, nothing indicates which direction would be the right one to go. It doesn't matter if the AI reaches a dead end, but it has to be able walk back out of it to a previously not inspected location and continue its search there. Initially, the AI starts out knowing only the starting area of the whole map. As it walks around, new points will be added to the pixel-map as the AI corresponding to the AIs range of sight (think of it like the AI is clearing the fog of war) The problem is in 2D space. All I have is the pixel map. There are no paths in the pixel map which are "too narrow". The AI fits through everything. It shouldn't be a brute force solution. E.g. it would be possible to simply find a path to each pixel in the pixel map that is yet undiscovered (with A*, for example), which will lead to the AI discovering new pixels. This could be repeated until the end is reached. The path doesn't have to be the shortest path (this is impossible without knowing the entire map beforehand), but when movements within the visible area are calculated, the shortest and from a human standpoint most logical path should be taken (e.g. if you can see a way out of your room into a hallway, you would obviously go there instead of exploring the corner of your current room). What kind of approaches to solve this problem are there?

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• Package manager borked with gforge

  - by Leif Andersen

  I've been having a problem with the package manager. I seemed to have installed gforge, partially, but it keeps giving me errors whenever I install something. (Note that the thing I'm trying to install actually does get installed, but there is always an error returned). Here it is: Creating /etc/gforge/httpd.conf Creating /etc/gforge/httpd.secrets Creating /etc/gforge/local.inc Creating other includes invoke-rc.d: unknown initscript, /etc/init.d/postgresql-8.4 not found. dpkg: error processing gforge-db-postgresql (--configure): subprocess installed post-installation script returned error exit status 100 Errors were encountered while processing: gforge-db-postgresql E: Sub-process /usr/bin/dpkg returned an error code (1) When I try to remove it with: sudo apt-get purge gforge-common I get this: Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: gforge-common* gforge-db-postgresql* 0 upgraded, 0 newly installed, 2 to remove and 9 not upgraded. 1 not fully installed or removed. After this operation, 5,853kB disk space will be freed. Do you want to continue [Y/n]? (Reading database ... 717305 files and directories currently installed.) Removing gforge-db-postgresql ... Replacing config file /etc/postgresql/8.4/main/pg_hba.conf with new version invoke-rc.d: unknown initscript, /etc/init.d/postgresql-8.4 not found. dpkg: error processing gforge-db-postgresql (--purge): subprocess installed pre-removal script returned error exit status 100 Removing gforge-common ... Purging configuration files for gforge-common ... Processing triggers for man-db ... Errors were encountered while processing: gforge-db-postgresql E: Sub-process /usr/bin/dpkg returned an error code (1) And it complains until I do a: sudo apt-get install -f At which point gforge is re-installed. I'm out of ideas, does anyone else have any other ideas with what might be wrong, and more importantly, how I can fix it? Thank you.

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• Drawing particles as a smooth blob

  - by Nömmik

  I'm new to game/graphics development and I'm playing around with particles (in 2D). I want to draw particles close to each other as a blob, just as liquid/water. I do not want to draw big circles overlapping as the blob won't be smooth (and too big). I don't really know physics but I assume what I want is something looking similar to surface tension. I haven't been able to find anything on stackexchange or on Google (maybe I do not know the correct keywords?). So far I have found two possible solutions, but I am unable to find any concrete information about algorithms. One of them is to calculate the concave hull of particles I consider being a blob. I can calculate the blob by creating an equivalence class (on the relation "close to each other"). Strangely enough I haven't been able to find any algorithm explaining how to calculate the concave hull. Many posts (and among stackexchange) links to libraries or commercial products that do this (I need libraries to work in C#), but never any algorithm. Also this solution might have a problem with a circle of particles, which would not detect the empty space in the middle. While researching concave hull I stumbled upon something called alpha shapes. Which seems to be exactly what I want to do, however just as with concave hull I haven't found any source explaining how they actually work. I have found some presentation materials but not enough to go on. It's like a big secret everyone knows except me :-/ After calculating the concave hull or alpha shape I want to make it a Bézier curve to make it smooth and nice. Although I do find my approach a bit too complex, maybe I am trying to solve this the wrong way? If you can either suggest any other solution to my problem, or explain the pieces I am missing I would be very happy and grateful :-) Thanks.

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• Error with APE Server Installation

  - by sadmicrowave

  I was trying to install APE-Server from the .deb file at the ape-server homepage (www.ape-project.org) and I ran into an error so wanted to try removing the installation and reinstalling. I did a sudo apt-get remove ape-server which ran successfully but left ape-server folders in my /etc/ and /etc/init.d locations. Me being an idiot new comer to linux decided that manually delete those folders. Now when I reinstall the ape-server those folders don't get recreated and therefore I cannot send the /etc/init.d/ape-server [option] command because the folder is not found. When I try to sudo apt-get purge (or remove) ape-server I get the following sudo apt-get purge ape-server Reading package lists... Done Building dependency tree Reading state information... Done The following packages will be REMOVED: ape-server* 0 upgraded, 0 newly installed, 1 to remove and 92 not upgraded. 1 not fully installed or removed. After this operation, 1,753kB disk space will be freed. Do you want to continue [Y/n]? y (Reading database ... 43924 files and directories currently installed.) Removing ape-server ... invoke-rc.d: unknown initscript, /etc/init.d/ape-server not found. dpkg: error processing ape-server (--purge): subprocess installed pre-removal script returned error exit status 100 update-rc.d: /etc/init.d/ape-server: file does not exist dpkg: error while cleaning up: subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: ape-server E: Sub-process /usr/bin/dpkg returned an error code (1) My question is; how do I remove all of the ape-server installation packages that were installed so I can reinstall from scratch?

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• Visual Studio Continued Excitement

  - by Daniel Moth

  As you know Visual Studio 2012 RTM’d and then became available in August (Soma’s blog posts told you that here and here), and the VS2012 launch was earlier this month (Soma also told you that here). Every time a release of Visual Studio takes place I am very excited, since this has been my development tool of choice for almost my entire career (from many years before I joined Microsoft). I am doubly excited with this release since it is the second version of Visual Studio that I have worked on and contributed major features to, now that I’ve been in the developer division (DevDiv) for over 4 years. Additionally, I am very excited about the new era that VS2012 starts with VSUpdate for continued customer value: instead of waiting for the next major version of VS to get new features, there is new infrastructure to enable friction-free updates. The first update will ship before the end of this year, and you can read more about it at Brian’s blog post. I also noticed that a CTP of the first quarterly update is available to download here. In the last two months, the VS2012 family of products we all worked on in DevDiv shipped, coinciding with the end of the Microsoft financial/review year, and naturally followed by a couple of organizational changes (e.g. see Jason’s blog post)… On a personal level, this meant that I was very lucky to have an opportunity present itself to me that I simply could not turn down, so I grabbed it! I’ll still be working on Visual Studio, but not in the Parallel Computing part of the C++ team; instead I will be PM-leading the VS Diagnostics team… Stay tuned for details of what is coming in that space, in the VS updates and in the next major VS release, as I am able to share them… Comments about this post by Daniel Moth welcome at the original blog.

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• How do search engines handle hyphenated words?

  - by NinjaKC

  I am not sure my title fully explains what I mean. I thought this might be an interesting question. If I had a set of keywords, broken with a dash or 2, will search engines consider the dashed split keyword as maybe a full keyword? Say I have a site that sort of breaks words down, like the dictionary sites do. So a keyword for that page, might end up in the page, and / or the URL, as broken by dashes. Key-word = keyword Co-op-er-at-ive = cooperative Pho-to-gra-phy = Photography www.example.com/key-word/ www.example.com/co-op-er-at-ive/ www.example.com/pho-to-gra-phy/ I know search engines will consider a dash (at least Google) as a space, and understand it as multiple words. But in the English language, a dash can also break a word down (at least I think it can, can't it?), so will search engines also take this into consideration? I did a 'little' research, I Googled some words and placed random dashes, and it returned the words I searched for, but this could be considered a typo from the user on Google's search end, so really I am wondering if I can purposely put a dash in a keyword, and have the search engine spiders still catch that keyword as the real word without dashes? I've done a little Googling and looking here on Stackoverflow, but everything comes down to dashes for multiple words, not really the specific thing I'm trying to figure out. Hopefully that makes sense, I am not an expert in SEO, yet, but get the basics and have been playing, and this is just really a random question to satisfy my knowledge of playing :P

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• Big AdventureWorks2012

  - by jamiet

  Last week I launched AdventureWorks on Azure, an initiative to make SQL Azure accessible to anyone, in my blog post AdventureWorks2012 now available for all on SQL Azure. Since then I think its fair to say that the reaction has been lukewarm with 31 insertions into the [dbo].[SqlFamily] table and only 8 donations via PayPal to support it; on the other hand those 8 donators have been incredibly generous and we nearly have enough in the bank to cover a full year’s worth of availability. It was always my intention to try and make this offering more appealing and to that end I have used an adapted version of Adam Machanic’s make_big_adventure.sql script to massively increase the amount of data in the database and give the community more scope to really push SQL Azure and see what it is capable of. There are now two new tables in the database: [dbo].[bigProduct] with 25200 rows [dbo].[bigTransactionHistory] with 7827579 rows The credentials to login and use AdventureWorks on Azure are as they were before: Server mhknbn2kdz.database.windows.net Database AdventureWorks2012 User sqlfamily Password sqlf@m1ly Remember, if you want to support AdventureWorks on Azure simply click here to launch a pre-populated PayPal Send Money form - all you have to do is login, fill in an amount, and click Send. We need more donations to keep this up and running so if you think this is useful and worth supporting, please please donate.   I mentioned that I had to adapt Adam’s script, the main reasons being: Cross-database queries are not yet supported in SQL Azure so I had to create a local copy of [dbo].[spt_values] rather than reference that in [master] SELECT…INTO is not supported in SQL Azure The 1GB limit of SQLAzure web edition meant that there would not be enough space to store all the data generated by Adam’s script so I had to decrease the total number of rows. The amended script is available on my SkyDrive at https://skydrive.live.com/redir.aspx?cid=550f681dad532637&resid=550F681DAD532637!16756&parid=550F681DAD532637!16755 @Jamiet

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• Is aspect oriented programming a misnomer?

  - by glenviewjeff

  From everything I have learned about "Aspect Oriented Programming" or "Aspect Oriented Software Development," labeling it as a programming paradigm or methodology appears to be inaccurate. From what I can tell it is not a fundamental technique for programming. To nail down what is meant by "paradigm" and "methodology," please refer to the following definitions from the American Heritage Dictionary. Compare how well or poorly "Object-Oriented Programming" applies to each vs. how well AOP fits. Paradigm: A set of assumptions, concepts, values, and practices that constitutes a way of viewing reality for the community that shares them, especially in an intellectual discipline. Methodology: A body of practices, procedures, and rules used by those who work in a discipline or engage in an inquiry; a set of working methods. "Evidence-based medicine" satisfies the definition of paradigm, but "hysterectomy-based medicine" would be a misnomer because the problem space is too narrow. I am getting the impression that AOP may be misnamed because based on the "oriented-programming" suffix, AOP is alleging to be both a paradigm and a methodology in the same way "Object-Oriented Programming" is. Both of these terms (paradigm and methodology) indicate a fundamental technique, where what I understand about aspects is a technology for solving a narrow problem scope, maybe comparable in magnitude to the static variable feature of Java. If it's true that aspects solve a narrow set of problems, and AOP isn't a misnomer, then why shouldn't all programming techniques be given the "oriented-programming" suffix, such as "inheritance-oriented programming," "dependency-oriented programming," or "scope-oriented programming?"

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• Building Single Page Apps on the Microsoft Stack

  - by Stephen.Walther

  Thank you everyone who came to my talk last night on Building Single Page Apps on the Microsoft Stack. I’ve attached the slides and code samples below. Here’s a quick summary of the talk. I argued that Single Page Apps are better than traditional Server Side Apps because: Single Page Apps are Stateful – In a traditional server-side app, whenever you navigate to a new page, all of your previous state is lost. It is like rebooting your computer whenever you perform any action In a Single Page App, Your Presentation Layer is Not Miles Away – In a traditional server-side app, because everything happens on the server, your presentation layer is separated from the user by space and time. In a Single Page App, the presentation layer is in the browser and not the server (which is the right place for a presentation layer). A Single Page App Respects the Web – It is easier to take advantage of HTML5 and related standards when building a Single Page App. Next, I recommended using the following four technologies when building a web application: Knockout – This is how you create your presentation layer. ASP.NET Web API – This is how you expose JSON data from your web server and perform server-side validation. HTML5 – This is how you implement client-side validation. Sammy – This is how you implement client-side routing and create a Single Page App with multiple virtual pages. There are code samples in the download (look in the Samples folder) which demonstrate how all of these technologies work when building Single Page Apps. Powerpoint Sample Code

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• Selecting a JAX-RS implementation for a new project

  - by Fernando Correia

  I'm starting a new Java project which will require a RESTful API. It will be a SaaS business application serving mobile clients. I have developed one project with Java EE 6, but I'm not very familiar with the ecosystem, since most of my experience is on the Microsoft platform. Which would be a sensible choice for a JAX-RS implementation for a new project such as described? Judging by Wikipedia's list, main contenders seem to be Jersey, Apache CXF, RESTeasy and Restlet. But the Comparison of JAX-RS Implementations cited on Wikipedia is from 2008. My first impressings from their respective homepages is that: CXF aims to be a very comprehensive solution (reminds me of WCF in the Microsoft space), which makes me think it can be more complex to understand, setup and debug than what I need; Jersey is the reference implementation and might be a good choice, but it's legacy from Sun and I'm not sure how Oracle is treating it (announcements page doesn't work and last commit notice is from 4 months ago); RESTeasy is from JBoss and probably a solid option, though I'm not sure about learning curve; Restlet seems to be popular but has a lot of history, I'm not sure how up-to-date it is in the Java EE 6 world or if it carries a heavy J2EE mindset (like lots of XML configuration). What would be the merits of each of these alternatives? What about learning curve? Feature support? Tooling (e.g. NetBeans or Eclipse wizards)? What about ease of debugging and also deployment? Is any of these project more up-to-date than the others? How stable are them?

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• Welcome to the Oracle FedApps blog

  - by jeffrey.waterman

  Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin-top:0in; mso-para-margin-right:0in; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0in; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} Congratulations, you have stumbled upon Oracle’s newest blog: The Federal Applications Blog. Periodically I plan to provide some insight into how Oracle’s application solutions are being applied, or how they can be applied, within the Federal Government. If you are a user of, or just interested in, Oracle’s applications in the Federal space and have questions/topics you would like to see addressed in this blog, please post a comment. So bear with me as I take a bit of time to refine the content, look and feel of this blog. http://www.oracle.com/us/industries/public-sector/038044.htm http://www.oracle.com/us/industries/public-sector/038046.htm -- JMW

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• Kubuntu 11.04 bad experience, Gimp crashes and other bugs

  - by giowck

  I installed Kubuntu 11.04 64bit today. First let me expose some issues, this is not a rant, just some observations on Kubuntu 11.04 :) Flash doesn't work. The package "flashplugin-installer" was installed by rekonq. But still no flash. Additional Drivers (jockey-kde) doesn't show up automatically after first login. I tried to delete a large file (19,2 GB), an error appeared: "Please empty the trash first, no more space available" or something like that, but you know what? My trash was empty! (Then I found in Dolphin the settings to increment the max size of the trash). Amarok has no play/pause/forward/back buttons, only after changing settings to show those buttons on the top bar. GTK applications like ubuntu software center, inkscape... are in english, but my default language is "german". Only gimp allows to install the "de" language pack. The numblock turns off after each restart. In the KDE Control Center, the "remember last state" of numblock is set. But this is not working. I had some crashes: Nepomuk, Policy-kit, plasma-workspace and gimp. But now to the important stuff. I really need Gimp to work. After starting it, I get a crash: giowck@giowck-desktop:~$ gimp (gimp:1899): GLib-WARNING **: /build/buildd/glib2.0-2.28.6/./glib/goption.c:2132: ignoring no-arg, optional-arg or filename flags (8) on option of type 0 Speicherzugriffsfehler (in English: "Memory error") What can I do to run Gimp? Thanks

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• In Ubuntu 13.10, none of the hotkeys of LibreOffice works in non-English keyboard layout

  - by maqtanim

  In Ubuntu 13.10, the hotkeys/shortcut-keys (Ctrl+b, Ctrl+s etc) in LibreOffice are language dependent and work in English language only. While writing in any other language (i.e. any Cyrillic and/or any Bengali etc) it's impossible to use hotkeys, they just don't do anything. Switching to English input language enable hotkeys once again. This is very frustrating as user needs to switch language to save document, to make it bold, or italic, etc. This was not experienced in Ubuntu 13.04. Steps to reproduce: System Settings Text Entry. Add another keyboard layout beside English [In my case it is Bengali (Probhat)] Now launch Writer. Switch the keyboard layout from English (US) to Bengali (Probhat) by pressing Ctrl+Space. Press Ctrl+B to change font weight to bold. Error: Font weight does not get changed. Expected: Font weight should change to bold. Note: none other system hotkeys work as expected. I.e. Ctrl+s to save, or Ctrl+b to subscript, or Ctrl+i to italic etc. Workaround: The only way is to - change the keyboard layout to English then press desired hotkey then switch keyboard layout back to Bengali. The issue is critical, as it make writer very slow for keyboard-only typing.

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• Unity3d: calculate the result of a transform without modifying transform object itself

  - by Heisenbug

  I'm in the following situation: I need to move an object in some way, basically rotating it around its parent local position, or translating it in its parent local space (I know how to do this). The amount of rotation and translation is know at runtime (it depends on several factors, the speed of the object, enviroment factors, etc..). The problem is the following: I can perform this transformation only if the result position of the transformed object fit some criterias. An example could be this: the distance between the position before and after the transformation must be less than a given threshold. (Actually the conditions could be several and more complex) The problem is that if I use Transform.Rotate and Transform.Translate methods of my GameObject, I will loose the original Transform values. I think I can't copy the original Transform using instantiate for performance issues. How can I perform such a task? I think I have more or less 2 possibilities: First Don't modify the GameObject position through Transform. Calculate which will be the position after the transform. If the position is legal, modify transform through Translate and Rotate methods Second Store the original transform someway. Transform the object using Translate and Rotate. If the transformed position is illegal, restore the original one.

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• Linux to Solaris @ Morgan Stanley

  - by mgerdts

  I came across this blog entry and the accompanying presentation by Robert Milkoski about his experience switching from Linux to Oracle Solaris 11 for a distributed OpenAFS file serving environment at Morgan Stanley. If you are an IT manager, the presentation will show you: Running Solaris with a support contract can cost less than running Linux (even without a support contract) because of technical advantages of Solaris. IT departments can benefit from hiring computer scientists into Systems Programmer or similar roles.  Their computer science background should be nurtured so that they can continue to deliver value (savings and opportunity) to the business as technology advances. If you are a sysadmin, developer, or somewhere in between, the presentation will show you: A presentation that explains your technical analysis can be very influential. Learning and using the non-default options of an OS can make all the difference as to whether one OS is better suited than another.  For example, see the graphs on slides 3 - 5.  The ZFS default is to not use compression. When trying to convince those that hold the purse strings that your technical direction should be taken, the financial impact can be the part that closes the deal.  See slides 6, 9, and 10.  Sometimes reducing rack space requirements can be the biggest impact because it may stave off or completely eliminate the need for facilities growth. DTrace can be used to shine light on performance problems that may be suspected but not diagnosed.  It is quite likely that these problems have existed in OpenAFS for a decade or more.  DTrace made diagnosis possible. DTrace can be used to create performance analysis tools without modifying the source of software that is under analysis.  See slides 29 - 32. Microstate accounting, visible in the prstat output on slide 37 can be used to quickly draw focus to problem areas that affect CPU saturation.  Note that prstat without -m gives a time-decayed moving average that is not nearly as useful. Instruction level probes (slides 33 - 34) are a super-easy way to identify which part of a function is hot.

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• Rendering large and high poly meshes

  - by Aurus

  Consider an huge terrain that has a lot polygons, to render this terrain I thought of following techniques: Using height-map instead of raw meshes: Yes, but I want to create a lot of caves and stuff that simply wont work with height-maps. Using voxels: Yes, but I think that this would be to much since I don't even want to support changing terrain.. Split into multiple chunks and do some sort of LOD with the mesh: Yes, but how would I do that? Tessellation usually creates more detail not less. Precompute the same mesh in lower poly version (like Mudbox does) and depending on the distance it renders one of these meshes: Graphic memory is limited and uploading only the chunks won't solve that problem since the traffic would be too high. IMO the last one sounds really good, but imagine the following process: Upload and render the chunks depending on the current player position. [No problem] Player will walk straight forward Now we maybe have to change on of the low poly chunk with the high poly one So, Remove the low poly chunk and load the high poly chunk [Already to much traffic here, I think] I am not very experienced in graphic programming and maybe the upper process is totally okay but somehow I think it is too much. And how about the disk space it would require.. I think 3 kind of levels would be fine but isn't that also too much? (I am using OpenGL but I don't think that this is important)

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• How To Change Window Transparency in Windows 7 with a Hotkey

  - by YatriTrivedi

  Linux has a lot of eye-candy because of Compiz, my favorite of which is the window opacity plugin. Using a short AutoHotKey script, you can add that same functionality to Windows 7. I used this AHK script as a basis for changing opacity. It uses a single hotkey to change the active window’s transparency by 25% each time until it resets to 0. I wanted functionality similar to Compiz, so I modified the script to use the mouse wheel and shortened the increments to get more variety. Just hold down the Windows key and scroll down to see through the window. This decreases opacity and makes windows more transparent. Latest Features How-To Geek ETC Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions Hack Apart a Highlighter to Create UV-Reactive Flowers [Science] Add a “Textmate Style” Lightweight Text Editor with Dropbox Syncing to Chrome and Iron Is the Forcefield Really On or Not? [Star Wars Parody Video] Google Updates Picasa Web Albums; Emphasis on Sharing and Showcasing Uwall.tv Turns YouTube into a Video Jukebox Early Morning Sunrise at the Beach Wallpaper

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• What You Said: Malware Fighting Tips and Tricks

  - by Jason Fitzpatrick

  Earlier this week we asked you to share your favorite malware fighting tricks. Now we’re back to highlight some of the tips and tricks you shared. Our Ask the Readers series gives our awesome and technologically literate readers a chance to show off their know-how. Today we’re rounding up some of the tips and tricks from Wednesday’s Ask the Reader post What Are Your Best Malware Fighting Tricks and highlighting them here. Latest Features How-To Geek ETC Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions Awesome 10 Meter Curved Touchscreen at the University of Groningen [Video] TV Antenna Helper Makes HDTV Antenna Calibration a Snap Turn a Green Laser into a Microscope Projector [Science] The Open Road Awaits [Wallpaper] N64oid Brings N64 Emulation to Android Devices Super-Charge GIMP’s Image Editing Capabilities with G’MIC [Cross-Platform]

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• Picasa installs but is missing in the menu

  - by Swapnil Narendra

  Acer Aspire One Netbook Running Ubuntu Netbook Remix 10.10 (freshly installed) 1 GB Ram 150 GM HDD Space I am trying to install Picasa and when I do, it runs its course telling me that it has been installed. But when I try to look for Picasa to run it, it didnt show in the menu anywhere. I am unable to find Picasa on my system and it says that it has been installed already when I try to reinstall it. I have tried a few things; looked for the key: wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - .. and then added it. tried the following commands after adding Picasa to my source list: sudo apt-get upgrade sudo apt-get install picasa and here is what I got: swapnil@iva-swapo-netbook:~$ sudo apt-get install picasa Reading package lists... Done Building dependency tree Reading state information... Done picasa is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded. and when I tried to look for Picasa again.. I couldnt find it. So I am unable to install Picasa on my system. Please help. (I am also running this thread on ubuntu forums and havent got the solution yet so I am now here) tried Jorge's solution and it brought Picasa immediately, however I am unable to keep it in the launcher. There is no such option. All I can see is only 2 options: 1. Wine 2. Quit Still need help to keep it in the menu/launcher !

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• WebLogic and Java EE Roadmap and Strategy Session at OOW

  - by Ruma Sanyal

  If you are developing, managing or planning enterprise Java and business application deployments on Oracle WebLogic Server with Coherence or continue to have deployments of Oracle Application Server, then this session will give you the roadmap of how Oracle is evolving this infrastructure to be the next generation cloud application foundation for its customers. Mike Lehmann (aka Mr. WebLogic :), Senior Director of Product Management, will share Oracle's vision, product plans and roadmap for this server infrastructure and how it will be used in the rapidly maturing cloud infrastructure space. Attend this to help you make key decisions about running your enterprise applications on Oracle's enterprise Java server foundation. For more information about this and other WebLogic sessions, review the WebLogic Focus on document.  What you will learn? Learn the benefits of using WebLogic Server and Coherence in the cloud. Learn how Java EE 7 is going to change cloud development and deployment     Understand how to address large-scale infrastructures with WebLogic Server and Coherence     Details: Monday, 10/1; 1.45-2.45pm; Moscone West Room 2011  

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• I can't install Ubuntu on my Dell Inspiron 15R at all

  - by Kieran Rimmer

  I'm attempting to install Ubuntu 12.04LTS, 64 bit onto a Dell Inspiron 15R laptop. I've shrunk down one of the windows partitions and even used gparted to format the vacant space as ext4. However, the install disk simply does not present any options when it comes to the partitioning step. What I get is a non-responsive blank table As well as the above, I've changed the BIOS settings so that USB emulation is disabled (as per Can't install on Dell Inspiron 15R), and changed the SATA Operation setting to all three possible options. Anyway, the install CD will bring up the trial version of ubuntu, and if I open terminal and type sudo fdisk -l, I get this: Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0xb4fd9215 Device Boot Start End Blocks Id System /dev/sda1 63 80324 40131 de Dell Utility Partition 1 does not start on physical sector boundary. /dev/sda2 * 81920 29044735 14481408 7 HPFS/NTFS/exFAT /dev/sda3 29044736 1005142015 488048640 7 HPFS/NTFS/exFAT /dev/sda4 1005154920 1953520064 474182572+ 83 Linux Disk /dev/sdb: 32.0 GB, 32017047552 bytes 255 heads, 63 sectors/track, 3892 cylinders, total 62533296 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0xb4fd923d Device Boot Start End Blocks Id System /dev/sdb1 2048 16775167 8386560 84 OS/2 hidden C: drive If I type 'sudo parted -l', I get: Model: ATA WDC WD10JPVT-75A (scsi) Disk /dev/sda: 1000GB Sector size (logical/physical): 512B/4096B Partition Table: msdos Number Start End Size Type File system Flags 1 32.3kB 41.1MB 41.1MB primary fat16 diag 2 41.9MB 14.9GB 14.8GB primary ntfs boot 3 14.9GB 515GB 500GB primary ntfs 4 515GB 1000GB 486GB primary ext4 Model: ATA SAMSUNG SSD PM83 (scsi) Disk /dev/sdb: 32.0GB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 8589MB 8588MB primary Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only. Error: Can't have a partition outside the disk! I've also tried a Kubuntu 12.04 and Linuxmint install disks, wityh the same problem. I'm completely lost here. Cheers, Kieran

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• "Size mismatch" apt error when installing openJDK

  - by siddanth

  when i try install openjdk-7-jre-headless i am getting the following error: Reading package lists... Done Building dependency tree Reading state information... Done The following extra packages will be installed: ca-certificates-java icedtea-7-jre-jamvm java-common libcups2 libjpeg62 liblcms2-2 libnspr4 libnss3 libnss3-1d openjdk-7-jre-lib tzdata tzdata-java Suggested packages: default-jre equivs cups-common liblcms2-utils libnss-mdns sun-java6-fonts ttf-dejavu-extra ttf-baekmuk ttf-unfonts ttf-unfonts-core ttf-sazanami-gothic ttf-kochi-gothic ttf-sazanami-mincho ttf-kochi-mincho ttf-wqy-microhei ttf-wqy-zenhei ttf-indic-fonts-core ttf-telugu-fonts ttf-oriya-fonts ttf-kannada-fonts ttf-bengali-fonts The following NEW packages will be installed: ca-certificates-java icedtea-7-jre-jamvm java-common libcups2 libjpeg62 liblcms2-2 libnspr4 libnss3 libnss3-1d openjdk-7-jre-headless openjdk-7-jre-lib tzdata-java The following packages will be upgraded: tzdata 1 upgraded, 12 newly installed, 0 to remove and 122 not upgraded. Need to get 41.2 MB/43.5 MB of archives. After this operation, 64.0 MB of additional disk space will be used. Get:5 http://in.archive.ubuntu.com/ubuntu/ oneiric/main java-common all 0.42ubuntu2 [62.4 kB] Fetched 41.1 MB in 4min 5s (167 kB/s) Failed to fetch http://in.archive.ubuntu.com/ubuntu/pool/main/j/java-common/java-common_0.42ubuntu2_all.deb Size mismatch E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing? am unable to solve this. Am i missing something? please help me out in solving this.

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