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• Announcing the New Virtual Briefing Center

  - by Theresa Hickman

  Do you want to hear about real-world customer success stories? Or listen to Oracle Application leaders discuss the value in the latest releases of Oracle Application products? Do you want one place to download up-to-date content, including white papers, podcasts, webcasts and presentations? Did you miss the Virtual Trade Show at the beginning of 2011? If you answered yes to any of these questions, then the Virtual Briefing Center is the place to get up-to-date Oracle product information for Oracle E-Business Suite, PeopleSoft, JD Edwards, Fusion, Siebel and Hyperion across multiple product areas from financials, procurement, supply chain, CRM, Performance Management, and more. Every month we will have "Monthly Spotlights" to showcase new content. The following lists the upcoming live webcasts in July 2011: Weds. July 6, 2011 at 9:00 a.m. PST/12:00 p.m. EST: Hear about Amway’s upgrade to Oracle E-Business Suite 12.1 and how they stabilized financial modules, especially the month-end close processes. Thurs. July 14, 2011 at 9:00 a.m. PST/12:00 p.m. EST: Hear West Corporation share their PeopleSoft 9.1 upgrade, resulting in improved self-service, more robust reporting capabilities and new workflow and processes. Thurs. July 21, 2011 at 9:00 a.m. PST/12:00 p.m. EST: Learn how MFlex improved their operations, saved manpower and reduced time to close with their upgrade to JD Edwards EnterpriseOne 9.0. Thurs. July 28, 2011 at 9:00 a.m. PST/12:00 p.m. EST: IEEE discusses their upgrade to Siebel 8.1 using open web service architecture for faster SOA enablement allowing them to scale their membership capacity by 250%. If you cannot attend any of the above live events, that's OK because each of the webcasts in this series will be recorded and available on demand. And for you Financials folks who may have missed the webcasts from the Virtual Trade Show earlier this year, you can view them on demand by Visiting the Resource Library: Planning Your Successful Upgrade to Oracle E-Business Suite Financials 12.1. In this session, Bryant and Stratton College talk about their upgrade. Planning Your Successful Upgrade to PeopleSoft Financials 9.1. In this session, the University of Central Florida share their upgrade story. Fusion Financials: The New Standard for Finance. In this session, Terrance Wampler, the VP of Financial Application Strategy discusses the business value of Oracle's next generation financial applications and how customers can take advantage of Fusion Financials alongside their existing investments. What are you waiting for? Register now!

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• Recipient address rejected: User unknown in local recipient table;

  - by Thufir

  I've gone through the guide for mailman with some difficulty, but seem to be nearly there. I'm able to navigate to the mailman web GUI, create lists and subscribe. I just subscribe my local FQDN, so [email protected] for testing purposes. This FQDN only works on localhost. However, e-mails to the list address, in this case [email protected], are rejected: root@dur:~# root@dur:~# tail /var/log/mail.log Aug 28 08:28:43 dur postfix/master[12208]: terminating on signal 15 Aug 28 08:28:44 dur postfix/postfix-script[12322]: starting the Postfix mail system Aug 28 08:28:44 dur postfix/master[12323]: daemon started -- version 2.9.1, configuration /etc/postfix Aug 28 08:28:46 dur postfix/postfix-script[12332]: stopping the Postfix mail system Aug 28 08:28:46 dur postfix/master[12323]: terminating on signal 15 Aug 28 08:28:47 dur postfix/postfix-script[12437]: starting the Postfix mail system Aug 28 08:28:47 dur postfix/master[12438]: daemon started -- version 2.9.1, configuration /etc/postfix Aug 28 08:29:29 dur postfix/smtpd[12460]: connect from localhost[127.0.0.1] Aug 28 08:29:30 dur postfix/smtpd[12460]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in local recipient table; from=<[email protected]> to=<[email protected]> proto=ESMTP helo=<dur.bounceme.net> Aug 28 08:29:33 dur postfix/smtpd[12460]: disconnect from localhost[127.0.0.1] root@dur:~# root@dur:~# ll /var/lib/mailman/data/ total 56 drwxrwsr-x 2 root list 4096 Aug 28 08:28 ./ drwxrwsr-x 8 root list 4096 Aug 27 19:58 ../ -rw-r--r-- 1 root list 0 Aug 28 04:36 aliases -rw-r--r-- 1 root list 12288 Aug 28 04:36 aliases.db -rw-r--r-- 1 root list 12288 Aug 28 08:28 aliases.db.db -rw-r----- 1 root list 41 Aug 27 21:04 creator.pw -rw-rw-r-- 1 root list 10 Aug 27 19:58 last_mailman_version -rw-r--r-- 1 root list 14100 Oct 19 2011 sitelist.cfg root@dur:~# root@dur:~# grep alias /etc/postfix/main.cf alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases alias_database = hash:/var/lib/mailman/data/aliases.db #alias_database = hash:/etc/aliases root@dur:~# root@dur:~# postconf -n alias_database = hash:/var/lib/mailman/data/aliases.db alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases append_dot_mydomain = no biff = no broken_sasl_auth_clients = yes config_directory = /etc/postfix default_transport = smtp home_mailbox = Maildir/ inet_interfaces = loopback-only mailbox_command = /usr/lib/dovecot/deliver -c /etc/dovecot/conf.d/01-mail-stack-delivery.conf -m "${EXTENSION}" mailbox_size_limit = 0 mailman_destination_recipient_limit = 1 mydestination = $myhostname localhost.$mydomain localhost $mydomain myhostname = dur.bounceme.net mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 readme_directory = no recipient_delimiter = + relay_domains = lists.example.com relay_transport = relay relayhost = smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu) smtpd_recipient_restrictions = reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination smtpd_sasl_auth_enable = yes smtpd_sasl_authenticated_header = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_path = private/dovecot-auth smtpd_sasl_security_options = noanonymous smtpd_sasl_type = dovecot smtpd_tls_auth_only = yes smtpd_tls_cert_file = /etc/ssl/certs/ssl-mail.pem smtpd_tls_key_file = /etc/ssl/private/ssl-mail.key smtpd_tls_mandatory_ciphers = medium smtpd_tls_mandatory_protocols = SSLv3, TLSv1 smtpd_tls_received_header = yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtpd_use_tls = yes tls_random_source = dev:/dev/urandom transport_maps = hash:/etc/postfix/transport root@dur:~# Why is this e-mail rejected? It seems to, maybe be related to the alias_maps and alias_database settings in postfix.

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• Using ext4 in VMware machine

  First of all, using a journaling filesystems like NTFS, ext4, XFS, or JFS (not to name all of them) is a very good idea and nowadays unthinkable not to do. Linux offers a good variety of different option as journaling filesystem for your system. Since years I am using SGI's XFS and I am pretty confident with stability, performance and liability of the system. In earlier years I had to struggle with incompatibilities between XFS and the boot loader. Using an ext2 formatted /boot solved this issue. But, wow, that is ages ago! Lately, I had to setup a fresh Lucid Lynx (Ubuntu 10.04 LTS) system for a change of our internal groupware / messaging system. Therefore, I fired up a new virtual machine with almost standard configuration in VMware Server and run through our network-based PXE boot and installation procedure. At a certain step in this process, Ubuntu asks you about the partitioning of your hard drive(s). Honestly, I have to say that only out of curiousity I sticked to the "default" suggestion and gave my faith and trust into the Ubuntu installation routine... Resulting to have an ext4 based root mount point ( / ). The rest of the installation went on without further concerns or worries. Note:I really can't remember why I chose to go away from my favourite... Well, it should turn out to be the wrong decision after all. Ok, let's continue the story about ext4 in a VMware based virtual machine. After some hours installing additional packages and configuring the new system using LDAP for general authentication and login, I had an "out-of-the-box" usable enterprise messaging system based on Zarafa 6.40 Community Edition inclusive proper SSL-based Webaccess interface and Z-Push extension for ActiveSync with my Nokia mobile. Straightforward and pretty nice for the time spent on the setup. Having priority on other tasks I let the system just running and didn't pay any further attention at all. Until I run into an upgrade of "Mail for Exchange" on Symbian OS. My mobile did not bother me at all with the upgrade and everything went smooth, but trying to re-establish the ActiveSync connection to the Zarafa messaging system resulted in a frustating situation. So, I shifted my focus back to the Linux system and I was amazed to figure out that the root had been remounted readonly due to hard drive failures or at least ext4 reported errors. Firing up Google only confirmed my concerns and it seems that using ext4 for VMware based virtual machines does not look like a stable and reliable candidate to me. You might consider reading those external resources: ext4 fs corruption under VMWare Server 2.01Bug #389555 - ext4 filesystem corruption Well, I learned my lesson and ext{2|3|4} based filesystems are not going to be used on any of my Linux systems or customer installations in the future. Addendum: I did not try this setup in other virtualization environments like VirtualBox, qemu, kvm, Xen, etc.

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• How to recover from finite-state-machine breakdown?

  - by Earl Grey

  My question may seems very scientific but I think it's a common problem and seasoned developers and programmers hopefully will have some advice to avoid the problem I mention in title. Btw., what I describe bellow is a real problem I am trying to proactively solve in my iOS project, I want to avoid it at all cost. By finite state machine I mean this I have a UI with a few buttons, several session states relevant to that UI and what this UI represents, I have some data which values are partly displayed in the UI, I receive and handle some external triggers (represented by callbacks from sensors). I made state diagrams to better map the relevant scenarios that are desirable and alowable in that UI and application. As I slowly implement the code, the app starts to behave more and more like it should. However, I am not very confident that it is robust enough. My doubts come from watching my own thinking and implementation process as it goes. I was confident that I had everything covered, but it was enough to make a few brute tests in the UI and I quickly realized that there are still gaps in the behavior ..I patched them. However, as each component depends and behaves based on input from some other component, a certain input from user or some external source trigers a chain of events, state changes..etc. I have several components and each behave like this Trigger received on input - trigger and its sender analyzed - output something (a message, a state change) based on analysis The problem is, this is not completely selfcontained, and my components (a database item, a session state, some button's state)...COULD be changed, influenced, deleted, or otherwise modified, outside the scope of the event-chain or desirable scenario. (phone crashes, battery is empty phone turn of suddenly) This will introduce a nonvalid situation into the system, from which the system potentially COULD NOT BE ABLE to recover. I see this (althought people do not realize this is the problem) in many of my competitors apps that are on apple store, customers write things like this "I added three documents, and after going there and there, i cannot open them, even if a see them." or "I recorded videos everyday, but after recording a too log video, I cannot turn of captions on them.., and the button for captions doesn't work".. These are just shortened examples, customers often describe it in more detail..from the descriptions and behavior described in them, I assume that the particular app has a FSM breakdown. So the ultimate question is how can I avoid this, and how to protect the system from blocking itself? EDIT I am talking in the context of one viewcontroller's view on the phone, I mean one part of the application. I Understand the MVC pattern, I have separate modules for distinct functionality..everything I describe is relevant to one canvas on the UI.

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• SQL SERVER – Use ROLL UP Clause instead of COMPUTE BY

  - by pinaldave

  Note: This upgrade was test performed on development server with using bits of SQL Server 2012 RC0 (which was available at in public) when this test was performed. However, SQL Server RTM (GA on April 1) is expected to behave similarly. I recently observed an upgrade from SQL Server 2005 to SQL Server 2012 with compatibility keeping at SQL Server 2012 (110). After upgrading the system and testing the various modules of the application, we quickly observed that few of the reports were not working. They were throwing error. When looked at carefully I noticed that it was using COMPUTE BY clause, which is deprecated in SQL Server 2012. COMPUTE BY clause is replaced by ROLL UP clause in SQL Server 2012. However there is no direct replacement of the code, user have to re-write quite a few things when using ROLL UP instead of COMPUTE BY. The primary reason is that how each of them returns results. In original code COMPUTE BY was resulting lots of result set but ROLL UP. Here is the example of the similar code of ROLL UP and COMPUTE BY. I personally find the ROLL UP much easier than COMPUTE BY as it returns all the results in single resultset unlike the other one. Here is the quick code which I wrote to demonstrate the said behavior. CREATE TABLE tblPopulation ( Country VARCHAR(100), [State] VARCHAR(100), City VARCHAR(100), [Population (in Millions)] INT ) GO INSERT INTO tblPopulation VALUES('India', 'Delhi','East Delhi',9 ) INSERT INTO tblPopulation VALUES('India', 'Delhi','South Delhi',8 ) INSERT INTO tblPopulation VALUES('India', 'Delhi','North Delhi',5.5) INSERT INTO tblPopulation VALUES('India', 'Delhi','West Delhi',7.5) INSERT INTO tblPopulation VALUES('India', 'Karnataka','Bangalore',9.5) INSERT INTO tblPopulation VALUES('India', 'Karnataka','Belur',2.5) INSERT INTO tblPopulation VALUES('India', 'Karnataka','Manipal',1.5) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Mumbai',30) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Pune',20) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Nagpur',11 ) INSERT INTO tblPopulation VALUES('India', 'Maharastra','Nashik',6.5) GO SELECT Country,[State],City, SUM ([Population (in Millions)]) AS [Population (in Millions)] FROM tblPopulation GROUP BY Country,[State],City WITH ROLLUP GO SELECT Country,[State],City, [Population (in Millions)] FROM tblPopulation ORDER BY Country,[State],City COMPUTE SUM([Population (in Millions)]) BY Country,[State]--,City GO After writing this blog post I continuously feel that there should be some better way to do the same task. Is there any easier way to replace COMPUTE BY? Reference: Pinal Dave (http://blog.sqlauthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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• links for 2011-01-04

  - by Bob Rhubart

  Webcasts (tags: ping.fm) Five Key Trends in Enterprise 2.0 for 2011 (Oracle Enterprise 2.0 Blog) Kellsey Ruppel shares insight from Oracle's Andy MacMillan. (tags: oracle otn enterprise2.0) Victor Bax: Lost in Service Oriented Architecture? "SOA is a concept, no more, no less. SOA is not a technology, or a piece of software. It is an architecture, a model." - Victor Bax (tags: oracle soa) Jan-Leendert: Oracle 11g SOA Suite read multi record data from csv file with the file adapter (master-detail) "The file adapter is a very powerlful tool to read files with structured data. Most of the time you will read simple csv files with one record per row. But what if your csv file contains multiple records with different types?" - Jan-Leendert (tags: oracle soa soasuite) @myfear: Five ways to know how your data looked in the past. Entity Auditing. "Whatever requirements you have. I can promise you, that it will never be a simple solution. In general it's best to evaluate your purpose for auditing in detail." - Oracle ACE Director Markus Eisele (tags: oracle otn oracleace java) @fteter: Buffing Up The Crystal Ball "While I'm already tired of seeing these types of posts (I'm writing on New Year's Day), I'm also feeling guilty about not making my own set of predictions." - Oracle ACE Director Floyd Teter (tags: oracle otn oracleace ec2 cloud fusionmiddleware) @bex: ECM New Year's Resolutions "Happy new year! Most people use the first post of the year to go over their own blog statistics of popular posts... but since my blog's fiscal year ends in April, I decided to do new years resolutions instead." - Oracle ACE Director Bex Huff (tags: oracle otn oracleace ecm enterprise2.0) Izaak de Hullu: Embedded Java in a 11g BPEL process "In an earlier blog my colleague Peter Ebell explained how you can create an extension of com.collaxa.cube.engine.ext.BPELXExecLet to do your coding in a regular Java environment so you have code completion and validation..." - Izaak de Hullu (tags: oracle otn bpel java soa) @gschmutz: Cannot access EM console after installing SOA Suite 11g PS2 Oracle ACE Director Guido Schmutz encounters a problem and shares the solution. (tags: oracle otn oracleace soa soasuite)

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• Is there a better term than "smoothness" or "granularity" to describe this language feature?

  - by Chris

  One of the best things about programming is the abundance of different languages. There are general purpose languages like C++ and Java, as well as little languages like XSLT and AWK. When comparing languages, people often use things like speed, power, expressiveness, and portability as the important distinguishing features. There is one characteristic of languages I consider to be important that, so far, I haven't heard [or been able to come up with] a good term for: how well a language scales from writing tiny programs to writing huge programs. Some languages make it easy and painless to write programs that only require a few lines of code, e.g. task automation. But those languages often don't have enough power to solve large problems, e.g. GUI programming. Conversely, languages that are powerful enough for big problems often require far too much overhead for small problems. This characteristic is important because problems that look small at first frequently grow in scope in unexpected ways. If a programmer chooses a language appropriate only for small tasks, scope changes can require rewriting code from scratch in a new language. And if the programmer chooses a language with lots of overhead and friction to solve a problem that stays small, it will be harder for other people to use and understand than necessary. Rewriting code that works fine is the single most wasteful thing a programmer can do with their time, but using a bazooka to kill a mosquito instead of a flyswatter isn't good either. Here are some of the ways this characteristic presents itself. Can be used interactively - there is some environment where programmers can enter commands one by one Requires no more than one file - neither project files nor makefiles are required for running in batch mode Can easily split code across multiple files - files can refeence each other, or there is some support for modules Has good support for data structures - supports structures like arrays, lists, and especially classes Supports a wide variety of features - features like networking, serialization, XML, and database connectivity are supported by standard libraries Here's my take on how C#, Python, and shell scripting measure up. Python scores highest. Feature C# Python shell scripting --------------- --------- --------- --------------- Interactive poor strong strong One file poor strong strong Multiple files strong strong moderate Data structures strong strong poor Features strong strong strong Is there a term that captures this idea? If not, what term should I use? Here are some candidates. Scalability - already used to decribe language performance, so it's not a good idea to overload it in the context of language syntax Granularity - expresses the idea of being good just for big tasks versus being good for big and small tasks, but doesn't express anything about data structures Smoothness - expresses the idea of low friction, but doesn't express anything about strength of data structures or features Note: Some of these properties are more correctly described as belonging to a compiler or IDE than the language itself. Please consider these tools collectively as the language environment. My question is about how easy or difficult languages are to use, which depends on the environment as well as the language.

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• What source code organization approach helps improve modularity and API/Implementation separation?

  - by Berin Loritsch

  Few languages are as restrictive as Java with file naming standards and project structure. In that language, the file name must match the public class declared in the file, and the file must live in a directory structure matching the class package. I have mixed feelings about that approach. While I never have to guess where a file lives, there's still a lot of empty directories and artificial constraints. There's several languages that define everything about a class in one file, at least by convention. C#, Python (I think), Ruby, Erlang, etc. The commonality in most these languages is that they are object oriented, although that statement can probably be rebuffed (there is one non-OO language in the list already). Finally, there's quite a few languages mostly in the C family that have a separate header and implementation file. For C I think this makes sense, because it is one of the few ways to separate the API interface from implementations. With C it seems that feature is used to promote modularity. Yet, with C++ the way header and implementation files are split seems rather forced. You don't get the same clean API separation that you do with C, and you are forced to include some private details in the header you would rather keep only in the implementation. There's quite a few languages that have a concept that overlaps with interfaces like Java, C#, Go, etc. Some languages use what feels like a hack to provide the same concept like C# using pure virtual abstract classes. Still others don't really have an interface concept and rely on "duck" typing--for example Ruby. Ruby has modules, but those are more along the lines of mixing in behaviors to a class than they are for defining how to interact with a class. In OO terms, interfaces are a powerful way to provide separation between an API client and an API implementation. So to hurry up and ask the question, from a personal experience point of view: Does separation of header and implementation help you write more modular code, or does it get in the way? (it helps to specify the language you are referring to) Does the strict file name to class name scheme of Java help maintainability, or is it unnecessary structure for structure's sake? What would you propose to promote good API/Implementation separation and project maintenance, how would you prefer to do it?

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• Why does aptitude want to remove a bunch of files?

  - by Mediterran81

  Recently I encountered dependencies resolve issues when using APTITUDE (it is my favorite). Nevertheless, I started to feel that APTITUDE does not behave as it is supposed to be in 64 bits systems while apt-get works fine. Can someone confirm that APTITUDE is buggy in Ubuntu 11.10 amd64? Edit: For example, when tried to install ntfs-config using APTITUDE, it asked me to remove over 100 packages (skype for example), while using apt-get worked fine. han@L502X:~$ sudo aptitude install ntfs-config [sudo] password for han: The following NEW packages will be installed: ntfs-3g{ab} ntfs-config 0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 0 B/640 kB of archives. After unpacking 2,466 kB will be used. The following packages have unmet dependencies: ntfs-3g: Conflicts: ntfsprogs but 2.0.0-1ubuntu4 is installed. The following actions will resolve these dependencies: Remove the following packages: 1) flashplugin-downloader 2) flashplugin-installer 3) libasound2 4) libasound2-plugins 5) libasyncns0 6) libatk1.0-0 7) libaudio2 8) libavahi-client3 9) libavahi-common3 10) libc6 11) libcairo2 12) libcomerr2 13) libcups2 14) libcurl3 15) libdatrie1 16) libdb5.1 17) libdbus-1-3 18) libdbusmenu-qt2 19) libexpat1 20) libffi6 21) libflac8 22) libfontconfig1 23) libfreetype6 24) libgcc1 25) libgcrypt11 26) libgdk-pixbuf2.0-0 27) libglib2.0-0 28) libgnutls26 29) libgpg-error0 30) libgssapi-krb5-2 31) libgtk2.0-0 32) libice6 33) libidn11 34) libjack-jackd2-0 35) libjasper1 36) libjpeg62 37) libjson0 38) libk5crypto3 39) libkeyutils1 40) libkrb5-3 41) libkrb5support0 42) liblcms1 43) libldap-2.4-2 44) libmng1 45) libnspr4 46) libnspr4-0d 47) libnss3 48) libnss3-1d 49) libogg0 50) libpango1.0-0 51) libpcre3 52) libpixman-1-0 53) libpng12-0 54) libpulse0 55) libqt4-dbus 56) libqt4-declarative 57) libqt4-network 58) libqt4-script 59) libqt4-sql 60) libqt4-xml 61) libqt4-xmlpatterns 62) libqtcore4 63) libqtgui4 64) librtmp0 65) libsamplerate0 66) libsasl2-2 67) libsasl2-modules 68) libselinux1 69) libsm6 70) libsndfile1 71) libspeexdsp1 72) libsqlite3-0 73) libssl1.0.0 74) libstdc++6 75) libtasn1-3 76) libthai0 77) libtiff4 78) libuuid1 79) libvorbis0a 80) libvorbisenc2 81) libwrap0 82) libx11-6 83) libxau6 84) libxcb-render0 85) libxcb-shm0 86) libxcb1 87) libxcomposite1 88) libxcursor1 89) libxdamage1 90) libxdmcp6 91) libxext6 92) libxfixes3 93) libxft2 94) libxi6 95) libxinerama1 96) libxrandr2 97) libxrender1 98) libxss1 99) libxt6 100) libxv1 101) nspluginviewer 102) nspluginwrapper 103) ntfsprogs 104) skype 105) sni-qt 106) zlib1g Leave the following dependencies unresolved: 107) flashplugin-downloader recommends libasound2-plugins (>= 1.0.16) Accept this solution? [Y/n/q/?]

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• Dynamic character animation - Using the physics engine or not

  - by Lex Webb

  I'm planning on building a dynamic reactant animation engine for the characters in my 2D Game. I have already built templates for a skeleton based animation system using key frames and interpolation to specify a limbs position at any given moment in time. I am using Farseer physics (an extension of Box2D) in Monogame/XNA in C# My real question lies in how i go about tying this character animation into the physics engine. I have two options: Moving limbs using physics engine - applying a interpolated force to each limb (dynamic body) in order to attempt to get it to its position as donated by the skeleton animation. Moving limbs by simply changing the position of a fixed body - Updating the new position of each limb manually, attempting to take into account physics collisions. Then stepping the physics after the animation to allow for environment interaction. Each of these methods have their distinct advantages and disadvantages. Physics based movement Advantages: Possibly more natural/realistic movement Better interaction with game objects as force applying to objects colliding with characters would be calculated for me. No need to convert to dynamic bodies when reacting to projectiles/death/fighting. Disadvantages: Possible difficulty in calculating correct amount of force to move a limb a certain distance at a constant rate. Underlying character balance system would need to be created that would need to be robust enough to prevent characters falling over at the touch of a feather. Added code complexity and processing time for the above. Static Object movement Advantages: Easy to interpolate movement of limbs between game steps Moving limbs is as simple as applying a rotation to the skeleton bone. Greater control over limbs, wont need to worry about characters falling over as all animation would be pre-defined. Disadvantages: Possible unnatural movement (Depends entirely on my animation skills!) Bad physics collision reactions with physics engine (Dynamic bodies simply slide out of the way of static objects) Need to calculate collisions with physics objects and my limbs myself and apply directional forces to them. Hard to account for slopes/stairs/non standard planes when animating walking/running animations. Need to convert objects to dynamic when reacting to projectile/fighting/death physics objects. The Question! As you can see, i have thought about this extensively, i have also had Google into physics based animation and have found mostly dissertation papers! Which is filling me with sense that it may a lot more advanced than my mathematics skills. My question is mostly subjective based on my findings above/any experience you may have: Which of the above methods should i use when creating my game? I am willing to spend the time to get a physics solution working if you think it would be possible. In the end i want to provide the most satisfying experience for the gamer, as well as a robust and dynamic system i can use to animate pretty much anything i need.

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• Wifi disabled for Intel Centrino Wireless-N 1000 Intel in 12.04

  - by new_bie

  Laptop model - HP- dm4 - 2070. I had faced the same problem for wireless being disabled in case of 11.10. It had to do with the new kernel. I thought with 12.04 this problem will be handled but the problem persists. Is there no way to get the wireless working except for the way mentioned in the following link ?? Wifi for Centrino Wireless-N 1000 Intel Corporation (HP pavillion dm4 - 2070us) is not working Output for sudo lshw -class network *-network UNCLAIMED description: Network controller product: Centrino Wireless-N 1000 vendor: Intel Corporation physical id: 0 bus info: pci@0000:01:00.0 version: 00 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress cap_list configuration: latency=0 resources: memory:c2500000-c2501fff *-network description: Ethernet interface product: AR8151 v2.0 Gigabit Ethernet vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:08:00.0 logical name: eth0 version: c0 serial: 2c:41:38:07:f3:e3 size: 100Mbit/s capacity: 1Gbit/s width: 64 bits clock: 33MHz capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt-fd autonegotiation configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.1.0-NAPI duplex=full firmware=N/A ip=192.168.1.116 latency=0 link=yes multicast=yes port=twisted pair speed=100Mbit/s resources: irq:43 memory:c1400000-c143ffff ioport:2000(size=128) Output for dmesg | grep iwl [ 14.742886] iwlwifi 0000:01:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 [ 14.742897] iwlwifi 0000:01:00.0: setting latency timer to 64 [ 14.743013] iwlwifi 0000:01:00.0: pci_resource_len = 0x00002000 [ 14.743016] iwlwifi 0000:01:00.0: pci_resource_base = ffffc90000c78000 [ 14.743018] iwlwifi 0000:01:00.0: HW Revision ID = 0x0 [ 14.743119] iwlwifi 0000:01:00.0: irq 42 for MSI/MSI-X [ 14.743161] iwlwifi 0000:01:00.0: Detected Intel(R) Centrino(R) Wireless-N 1000 BGN, REV=0x6C [ 14.743229] iwlwifi 0000:01:00.0: L1 Enabled; Disabling L0S [ 14.765147] iwlwifi 0000:01:00.0: device EEPROM VER=0x15d, CALIB=0x6 [ 14.765151] iwlwifi 0000:01:00.0: Device SKU: 0X50 [ 14.765154] iwlwifi 0000:01:00.0: Valid Tx ant: 0X1, Valid Rx ant: 0X3 [ 14.765907] iwlwifi 0000:01:00.0: Tunable channels: 13 802.11bg, 0 802.11a channels [ 14.912840] iwlwifi 0000:01:00.0: request for firmware file 'iwlwifi-1000-5.ucode' failed. [ 14.914254] iwlwifi 0000:01:00.0: request for firmware file 'iwlwifi-1000-4.ucode' failed. [ 14.915718] iwlwifi 0000:01:00.0: request for firmware file 'iwlwifi-1000-3.ucode' failed. [ 14.916986] iwlwifi 0000:01:00.0: request for firmware file 'iwlwifi-1000-2.ucode' failed. [ 14.919391] iwlwifi 0000:01:00.0: request for firmware file 'iwlwifi-1000-1.ucode' failed. [ 14.919445] iwlwifi 0000:01:00.0: no suitable firmware found! [ 14.919783] iwlwifi 0000:01:00.0: PCI INT A disabled [ 2868.960807] Modules linked in: snd_hda_codec_hdmi snd_hda_codec_idt rfcomm bnep bluetooth parport_pc ppdev binfmt_misc hid_logitech_dj usbhid hid joydev snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq hp_wmi sparse_keymap hp_accel lis3lv02d input_polldev snd_timer snd_seq_device wmi iwlwifi snd mac80211 i915 cfg80211 rts_pstor(C) drm_kms_helper drm uvcvideo videodev psmouse soundcore mei(C) v4l2_compat_ioctl32 mac_hid serio_raw snd_page_alloc i2c_algo_bit video lp parport atl1c

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• Maven Integrated View for NetBeans IDE

  - by Geertjan

  Started working on an oft-heard request from Kirk Pepperdine for an integrated view for multimodule builds for Maven projects in NetBeans IDE, as explained here. I suddenly had some kind of brainwave and solved all the remaining problems I had, by delegating to the LogicalViewProvider's node, instead of the project's node, which means I inherit all the icons, actions, package nodes, and anything else that was originally defined within the original project, in this case for the open source JAnnocessor project: Above, you can see that the Maven submodules can either be edited in-line, i.e., within the parent project, or separately, by opening them in the traditional NetBeans way. Get the module here: http://plugins.netbeans.org/plugin/45180/?show=true Some people out there might be interested in how this is achieved. First, hide the original ModulesNodeFactory in the layer. Then create the following class, which creates what you see in the screenshot above: import java.util.ArrayList; import java.util.List; import javax.swing.event.ChangeListener; import org.netbeans.api.project.Project; import org.netbeans.spi.project.SubprojectProvider; import org.netbeans.spi.project.ui.LogicalViewProvider; import org.netbeans.spi.project.ui.support.NodeFactory; import org.netbeans.spi.project.ui.support.NodeList; import org.openide.nodes.FilterNode; import org.openide.nodes.Node; @NodeFactory.Registration(projectType = "org-netbeans-modules-maven", position = 400) public class ModulesNodeFactory2 implements NodeFactory { @Override public NodeList<?> createNodes(Project prjct) { return new MavenModulesNodeList(prjct); } private class MavenModulesNodeList implements NodeList<Project> { private final Project project; public MavenModulesNodeList(Project prjct) { this.project = prjct; } @Override public List<Project> keys() { return new ArrayList<Project>( project.getLookup(). lookup(SubprojectProvider.class).getSubprojects()); } @Override public Node node(final Project project) { Node node = project.getLookup().lookup(LogicalViewProvider.class).createLogicalView(); return new FilterNode(node, new FilterNode.Children(node)); } @Override public void addChangeListener(ChangeListener cl) { } @Override public void removeChangeListener(ChangeListener cl) { } @Override public void addNotify() { } @Override public void removeNotify() { } } } Considering that there's only about 5 actual statements above, it's pretty amazing how much can be achieved with so little code. The NetBeans APIs really are very cool. Hope you like it, Kirk!

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• Error message during update from 13.04 to 13.10

  - by layonhands

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

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• Opening cursor files in a graphics editor?

  - by sdaau

  I'm looking at /usr/share/icons/DMZ-White/cursors, and there is: $ tree -s /usr/share/icons/DMZ-White/ /usr/share/icons/DMZ-White/ +-- [ 4096] cursors ¦   +-- [ 14] 00008160000006810000408080010102 -> v_double_arrow ... ¦   +-- [ 5] 9d800788f1b08800ae810202380a0822 -> hand2 ¦   +-- [ 8] arrow -> left_ptr ¦   +-- [ 15776] bd_double_arrow ¦   +-- [ 15776] bottom_left_corner ¦   +-- [ 15776] bottom_right_corner ¦   +-- [ 15776] bottom_side ... ... a bunch of files without extension, that GIMP cannot open. Is there an editor where these files can be opened - or at least a converter to something like .png? I can note that ImageMagick display also failed to open these files... Found also Gursor Maker - Cursor Editor for X11/GTK+; got the CVS code from SourceForge - it still uses Numeric (the old name of numpy), so to run it, you'll have to do: #from Numeric import * from numpy import * ... in xcurio.py, curxp.py, gimp.py, colorfunc.py - and comment the #from xml.dom.ext.reader import Sax2 in lsproj.py. With that, I got it running 11.04: ... but cannot get any files to open? So I thought I should grep for paths, nothing much came up - and when I looked into cursordefs.py, I simply had to paste this: CURSOR_ICON = gtk.gdk.pixbuf_new_from_xpm_data([ "10 16 3 1", " c None", ". c #000000", "+ c #FFFFFF", ".. ", ".+. ", ".++. ", ".+++. ", ".++++. ", ".+++++. ", ".++++++. ", ".+++++++. ", ".++++++++.", ".+++++....", ".++.++. ", ".+. .++. ", ".. .++. ", " .++. ", " .++. ", " .. "]) Heh :) In any case, doesn't look like it will be much usable on newer Ubuntus, unfortunately... Just tested XMC plugin as well - on 11.04, has to be built from source (from the link in the accepted answer); the requirements on my system resolved to: sudo apt-get install libgimp2.0-dev libglib2.0-0-dbg libglib2.0-0-refdbg libglib2.0-cil-dev libgtk2.0-0-dbg libgtk2.0-cil-dev ... after that, the configure/make procedure in the INSTALL file works. Note that this plugin is a bit "sneaky": ... that is, you should use "All files" (as there are no extensions); cursor previews at first will not be rendered. Then open one cursor file; after it has been opened, then there is a preview in the File/Open dialog; but other than that, it works fine...

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• Paypal PDT and IPN , how does it work?

  - by slow diver

  PDT Payment Data Transfer is getting the transaction data of the purchase that was made on paypal site and you want to fetch that on your own site and display to the user. Also you may want to store it in your database for archive and tracking purposes. But I cannot exactly follow the documentation here What I am not getting is Once you have activated PDT, every time a buyer makes a website payment and is redirected to your return URL, a transaction token will be passed along as a "GET" variable to this return URL. In order to properly use PDT and display transaction details to your customer, you should fetch the transaction token, variable name "tx", and retreive transaction details from PayPal by constructing an HTTP POST to PayPal. Your POST should be sent to https://www.paypal.com/cgi-bin/webscr. You must post the transaction token using the variable "tx" and the value of the transaction token previously received (e.g. "tx=transaction_token"), and the special identity token using the variable at and the value of your PDT identity token (e.g. "at=identity_token"). You will also need to append a variable named "cmd" with the value "_notify-synch", for example "cmd=_notify-synch", to the POST string. IPN I have setup Instant Payment Notification through setting according to this documentation. This is basically logging into your paypal account and enable IPN while specifying a url where the notification will be sent. This is used to complete an order so that the product can be shipped. What I did is setup a PHP page. I have created a table and whenever that page is called (or hit), it registers an entry in the table so I know a notification came from Paypal. But it does not work either. What am I really doing wrong? The first thing I want to trouble shoot though is when the buyer pays the amount, he is automatically redirected to my site. I have enabled this but automatic redirection just does not work. Instead he is shown the url as an option after payment confirmation is shown. Can someone guide my how the PDT process goes? Where do I make the request for PDT, is it along the very first request (Buy Now button) or it is sent later? Addition I found some good sampling code of how everything should work but it still does not work. I use this code http://officetrio.com/modules/free-php-paypal-ipn-script.php for IPN. I am using this for PDT. This one uses SSL, I changed SSL to regular HTTP (copied paypal version), still does not work. http://ykyuen.wordpress.com/2010/02/17/paypal-payment-data-transfer-sample-code/

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• Encrypting your SQL Server Passwords in Powershell

  - by laerte

  A couple of months ago, a friend of mine who is now bewitched by the seemingly supernatural abilities of Powershell (+1 for the team) asked me what, initially, appeared to be a trivial question: "Laerte, I do not have the luxury of being able to work with my SQL servers through Windows Authentication, and I need a way to automatically pass my username and password. How would you suggest I do this?" Given that I knew he, like me, was using the SQLPSX modules (an open source project created by Chad Miller; a fantastic library of reusable functions and PowerShell scripts), I merrily replied, "Simply pass the Username and Password in SQLPSX functions". He rather pointed responded: "My friend, I might as well pass: Username-'Me'-password 'NowEverybodyKnowsMyPassword'" As I do have the pleasure of working with Windows Authentication, I had not really thought this situation though yet (and thank goodness I only revealed my temporary ignorance to a friend, and the embarrassment was minimized). After discussing this puzzle with Chad Miller, he showed me some code for saving passwords on SQL Server Tables, which he had demo'd in his Powershell ETL session at Tampa SQL Saturday (and you can download the scripts from here). The solution seemed to be pretty much ready to go, so I showed it to my Authentication-impoverished friend, only to discover that we were only half-way there: "That's almost what I want, but the details need to be stored in my local txt file, together with the names of the servers that I'll actually use the Powershell scripts on. Something like: Server1,UserName,Password Server2,UserName,Password" I thought about it for just a few milliseconds (Ha! Of course I'm not telling you how long it actually took me, I have to do my own marketing, after all) and the solution was finally ready. First , we have to download Library-StringCripto (with many thanks to Steven Hystad), which is composed of two functions: One for encryption and other for decryption, both of which are used to manage the password. If you want to know more about the library, you can see more details in the help functions. Next, we have to create a txt file with your encrypted passwords:$ServerName = "Server1" $UserName = "Login1" $Password = "Senha1" $PasswordToEncrypt = "YourPassword" $UserNameEncrypt = Write-EncryptedString -inputstring $UserName -Password $PasswordToEncrypt $PasswordEncrypt = Write-EncryptedString -inputstring $Password -Password $PasswordToEncrypt "$($Servername),$($UserNameEncrypt),$($PasswordEncrypt)" | Out-File c:\temp\ServersSecurePassword.txt -Append $ServerName = "Server2" $UserName = "Login2" $Password = "senha2" $PasswordToEncrypt = "YourPassword" $UserNameEncrypt = Write-EncryptedString -inputstring $UserName -Password $PasswordToEncrypt $PasswordEncrypt = Write-EncryptedString -inputstring $Password -Password $PasswordToEncrypt "$($Servername),$($UserNameEncrypt),$($PasswordEncrypt)" | Out-File c:\temp\ ServersSecurePassword.txt -Append .And in the c:\temp\ServersSecurePassword.txt file which we've just created, you will find your Username and Password, all neatly encrypted. Let's take a look at what the txt looks like: .and in case you're wondering, Server names, Usernames and Passwords are all separated by commas. Decryption is actually much more simple:Read-EncryptedString -InputString $EncryptString -password "YourPassword" (Just remember that the Password you're trying to decrypt must be exactly the same as the encrypted phrase.) Finally, just to show you how smooth this solution is, let's say I want to use the Invoke-DBMaint function from SQLPSX to perform a checkdb on a system database: it's just a case of split, decrypt and be happy!Get-Content c:\temp\ServerSecurePassword.txt | foreach { [array] $Split = ($_).split(",") Invoke-DBMaint -server $($Split[0]) -UserName (Read-EncryptedString -InputString $Split[1] -password "YourPassword" ) -Password (Read-EncryptedString -InputString $Split[2] -password "YourPassword" ) -Databases "SYSTEM" -Action "CHECK_DB" -ReportOn c:\Temp } This is why I love Powershell.

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• Can't get Wireless RT2x00usb driver to work, and can't blacklist it

  - by TheLQ

  After a two year hiatus to Linux, I try it again out again. And then I run into to driver issues... I have an old Linksys WUSB54G v4 Wireless USB Adapter. In previous versions I had to use a combination of Ndiswrapper and Wicd to hope of getting it working. In 10.10, apparently there are built in drivers for it. Unfortunately they don't work. Fails to connect to my WPA network, fails to connect to my open unencrypted network. Wicd fails at "Obtaining IP address" or when using static IPs fails at verifying connectivity to network. Getting fed up I tried the ndiswrapper approach. Installed and configured, but still not working, even when blacklisting the rt2570 module. So for some debugging I added some lines to my /etc/modprobe.d/blacklist.conf file blacklist rt2570 blacklist prism54usb blacklist rt2x00lib blacklist rt2x00usb Restart and find this: lordquackstar@quackbeast:/etc/modprobe.d$ lsmod | grep rt2 rt2500usb 18049 0 rt2x00usb 9779 1 rt2500usb rt2x00lib 27275 2 rt2500usb,rt2x00usb led_class 2633 1 rt2x00lib mac80211 231541 2 rt2x00usb,rt2x00lib cfg80211 144470 2 rt2x00lib,mac80211 Seems to be ignored... Tried this: lordquackstar@quackbeast:/etc/modprobe.d$ sudo rmmod -f rt2x00usb ERROR: Removing 'rt2x00usb': Resource temporarily unavailable lordquackstar@quackbeast:/etc/modprobe.d$ sudo rmmod -f rt2x00lib ERROR: Removing 'rt2x00lib': Resource temporarily unavailable and couldn't connect. Restarted and was back to the same modules loading. Maybe there's something in the log: lordquackstar@quackbeast:/etc/modprobe.d$ tail -n100000 /var/log/syslog | grep rt2 Dec 13 19:01:15 quackbeast kernel: [ 23.698056] Registered led device: rt2500usb-phy0::radio Dec 13 19:01:15 quackbeast kernel: [ 23.698140] Registered led device: rt2500usb-phy0::quality Dec 13 19:01:15 quackbeast kernel: [ 23.701680] usbcore: registered new interface driver rt2500usb Dec 13 19:01:15 quackbeast NetworkManager[855]: <info> (wlan0): new 802.11 WiFi device (driver: 'rt2500usb' ifindex: 4) Dec 13 19:17:47 quackbeast kernel: [ 23.521759] Registered led device: rt2500usb-phy0::radio Dec 13 19:17:47 quackbeast kernel: [ 23.521824] Registered led device: rt2500usb-phy0::quality Dec 13 19:17:47 quackbeast kernel: [ 23.524740] usbcore: registered new interface driver rt2500usb Dec 13 19:17:47 quackbeast NetworkManager[798]: <info> (wlan0): new 802.11 WiFi device (driver: 'rt2500usb' ifindex: 4) Seems to be autoloading. So this means that even if I pull it out, remove the module, and get it working, it still won't work when its plugged in all the time. More info: lordquackstar@quackbeast:/etc/modprobe.d$ sudo lshw -C Network *SNIP* *-network description: Wireless interface physical id: 1 bus info: usb@1:2 logical name: wlan0 serial: 00:12:17:9b:f3:1e capabilities: ethernet physical wireless configuration: broadcast=yes driver=rt2500usb driverversion=2.6.35-24-generic firmware=N/A link=no multicast=yes wireless=IEEE 802.11bg USB: lordquackstar@quackbeast:/etc/modprobe.d$ lsusb | grep -i rt Bus 001 Device 003: ID 13b1:000d Linksys WUSB54G v4 802.11g Adapter [Ralink RT2500USB] Any suggestions on how to either fix the rt2x00usb driver or permanently block it from loading? Note that I already have ndiswrapper installed

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• Cannot install packages. "Warning: untrusted versions..." plus "method driver /usr/lib/apt/methods/http could not be found"

  - by Steve Tjoa

  Judging from Internet forums, these errors appear to be popular when attempting to install packages: steve:~$ sudo aptitude install examplepackage The following NEW packages will be installed: examplepackage examplepackage-common{a} 0 packages upgraded, 2 newly installed, 0 to remove and 0 not upgraded. Need to get 1,834 kB of archives. After unpacking 7,631 kB will be used. Do you want to continue? [Y/n/?] WARNING: untrusted versions of the following packages will be installed! Untrusted packages could compromise your system's security. You should only proceed with the installation if you are certain that this is what you want to do. examplepackage examplepackage-common Do you want to ignore this warning and proceed anyway? To continue, enter "Yes"; to abort, enter "No": Yes E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. E: Internal error: couldn't generate list of packages to download I followed this post by uninstalling ubuntu-keyring. But I cannot reinstall ubuntu-keyring or ubuntu-minimal -- the above errors reappear. In fact, I don't even seem to have apt (I must have caused this along the way by trying a bad solution, or maybe a clean): steve:~$ sudo apt-get update sudo: apt-get: command not found Aptitude works, but I can't install apt: steve:~$ sudo aptitude install apt The following NEW packages will be installed: apt 0 packages upgraded, 1 newly installed, 0 to remove and 0 not upgraded. Need to get 1,046 kB of archives. After unpacking 3,441 kB will be used. E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. E: Internal error: couldn't generate list of packages to download ...or update steve:~$ sudo aptitude update E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. E: The method driver /usr/lib/apt/methods/http could not be found. I tried this post. Didn't help. To summarize, the main problem is that I cannot install anything. While attempting to fix the problem, the other aforementioned errors occurred. Can you help me fix this error? Feel free to ask if you need more information. Stats: steve:~$ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 11.10 Release: 11.10 Codename: oneiric

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• Microsoft Virtual Academy

  Carpe Diem It's been since a while that I could write an article for this blog but alas, I was (and still am) very busy with customer's work. Which is actually good. So, what is this article going to tell you? Well, in general, just what I already tweeted, that life is constant process of learning - especially as software craftsman. Due to an upcoming new customer project in ASP.NET I had to seize the opportunity to get my head deeper into latest available technologies, like Windows Azure and SQL Azure. I know... cloud computing and so on is not a recent development and already available since quite a while but I never any means to get myself into this since roughly two weeks ago. Microsoft Virtual Academy I can't remember exactly what guided me towards the Microsoft Virtual Academy (MVA), oh wait... Yes, it was a posting on Facebook from an old CLIP community friend. He posted a shortened URL with #MVA tag that caught my attention. Thanks for that Thomas Kuberek. After the usual sign in or registration via Live ID I was a little bit surprised that Mauritius is not an available country option... Quick mail exchange with the MVA Decan, and yeah, apologies for the missing entry. So, currently I'm learning about Microsoft products and services, and collecting points under "Not Listed Country" until Mauritius is going to be added. Hopefully soon, as MVA honors your effort with different knowledge ranks that are compared to other students with public profiles. I think it's a nice move to add some game and competition factor into the learning game. The tracks and their different modules are mainly references to publicly available material online, namely on either MSDN, TechNet, Channel9, or other Microsoft based sites. The course material therefore also varies in different media and formats, ranging from simple online articles over downloadable documents (.docx or .pdf) to Silverlight / Windows Media streams with download options. Self-assessment and students ranking Each module in a track can be finished by taking part in a self-assessment. Up to now, the assessment I did (and passed) were limited to 10 minutes available time, and consisted of six to seven questions on the module training material. Nothing too serious but it gives you a glimpse idea how Microsoft certification exams are structured. Conclusion Nothing really new but nicely gathered, assembled and presented to the MVA students. At the moment, I wouldn't dare to compare the richness and quality of those courses with professional training offers, like Pluralsight .NET Training, LearnDevNow, VTC, etc. at all, but I think that MVA has potential. Give it a try, and let me know about your opinions.

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• New TPerlRegEx Compatible with Delphi XE

  - by Jan Goyvaerts

  The new RegularExpressionsCore unit in Delphi XE is based on the PerlRegEx unit that I wrote many years ago. Since I donated full rights to a copy rather than full rights to the original, I can continue to make my version of TPerlRegEx available to people using older versions of Delphi. I did make a few changes to the code to modernize it a bit prior to donating a copy to Embarcadero. The latest TPerlRegEx includes those changes. This allows you to use the same regex-based code using the RegularExpressionsCore unit in Delphi XE, and the PerlRegEx unit in Delphi 2010 and earlier. If you’re writing new code using regular expressions in Delphi 2010 or earlier, I strongly recomment you use the new version of my PerlRegEx unit. If you later migrate your code to Delphi XE, all you have to do is replace PerlRegEx with RegularExrpessionsCore in the uses clause of your units. If you have code written using an older version of TPerlRegEx that you want to migrate to the latest TPerlRegEx, you’ll need to take a few changes into account. The original TPerlRegEx was developed when Borland’s goal was to have a component for everything on the component palette. So the old TPerlRegEx derives from TComponent, allowing you to put it on the component palette and drop it on a form. The new TPerlRegEx derives from TObject. It can only be instantiated at runtime. If you want to migrate from an older version of TPerlRegEx to the latest TPerlRegEx, start with removing any TPerlRegEx components you may have placed on forms or data modules and instantiate the objects at runtime instead. When instantiating at runtime, you no longer need to pass an owner component to the Create() constructor. Simply remove the parameter. Some of the property and method names in the original TPerlRegEx were a bit unwieldy. These have been renamed in the latest TPerlRegEx. Essentially, in all identifiers SubExpression was replaced with Group and MatchedExpression was replaced with Matched. Here is a complete list of the changed identifiers: Old Identifier New Identifier StoreSubExpression StoreGroups NamedSubExpression NamedGroup MatchedExpression MatchedText MatchedExpressionLength MatchedLength MatchedExpressionOffset MatchedOffset SubExpressionCount GroupCount SubExpressions Groups SubExpressionLengths GroupLengths SubExpressionOffsets GroupOffsets Download TPerlRegEx. Source is included under the MPL 1.1 license.

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• How to debug lag using Bluetooth connected mouse and A2DP headset?

  - by gertvdijk

  I own a Logitech M555b mouse (since a week) for use with my HP Elitebook 8570w laptop running Kubuntu 12.04. Works fine right after connecting using the KDE Bluetooth control module. However, after some time (seemingly random), it starts to lag. Movements are being delayed for roughly 500ms for a short period of time. Usually it recovers after some time too, but it can take minutes. All actions are being delayed: movements, click, scrolls. Additionally, the movements can be choppy during these times. A workaround that always works for the same short period of time is to disconnect an re-connect the mouse. This can be done using the same KDE Bluetooth control module. What did I try already? Running this at boot time: echo on > `readlink -f /sys/class/bluetooth/hci0`/../../../power/level To disable any power saving features on the Bluetooth hci0 device. Check the mouse's batteries (it's just a week old, other new batteries: same result) Checking logs and kernel messages about Bluetooth-related entries: none aside the expected messages on connect time. I'm running kernel 3.5.0-13-generic as provided in the xorg-edgers PPA. Booting the regular 3.2 Precise kernel results in the same behaviour. Some other information that may help: It happens when no other Bluetooth connections are active on the machine. Similar symptoms also occur on my Bluetooth stereo (A2DP) headset, but then it's audio lagging and skipping. Swapping Bluetooth profiles as described here then helps. Conclusion: it's not the mouse that's faulty. The headset always worked fine using my now dead Thinkpad T61p with built-in Bluetooth. The bluetooth module in my laptop is connected via USB and shows up as Bus 002 Device 003: ID 0a5c:21e1 Broadcom Corp. I'm mobile and several people around me are using Bluetooth at work (A2DP mostly). It also occurs at home, where my neighbours are probably using Bluetooth as well. It could just be radio interference, but I think Bluetooth connections should just hop to another channel. And, moreover, it just works properly instantly when re-connecting. Therefore I think it's a software driver issue and I'd like to debug it. Is there any way to get more verbose logging on the Bluetooth(-hid) modules?

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• Getting WLAN on my Laptop to work (Medion MD98300)

  - by Anand Böhmer

  Dear Ubuntu Community, I am having difficulties to get the WLAN Adapter on my Medion 98300 Laptop to work. The WLAN Card seems to be connected through an internal USB Interface and the Card itself had shown up as a wirelles Network while installing Ubuntu. I have tried a few things earlier, but none of my google reasearches have brought me to a working solution... I am quite new to the Linux System and only knoew a couple of terminal commands so far, so I probably have missed out on a few possible solutions. Maybe you can help me? Thank you very much in advance! A fre minimal technical Details: AMD Turion 64 X2 Dual-Core Mobile Technolgie TL-50 NVIDIA GeForce Go 6150 SanDisk 64GB SSD 2GB RAM DDR2 667 nForce Chipset (I forgt the Version, but deductable from the GPU I guess) WiFi: ZyDAS ZD1211B 802.11g Thank's a lot again! :) UPDATE: I tried around myself a little and found a guide on the Linux Mint forums that helped! I already had tried to install the linux backport modules etc. What I finally did was update the linux firmware and run the following command: echo "options acer_wmi wirelles=1" sudo tee /etc/modprobe.d/acer_wmi.conf and rebooted now I found and could connect to networks, but unfortunately I found, that the link quality was very bad, around 40 to 50. Eventhough my Router is running at high power and is only 6 Meters away! I then switched a few channels, but that did not improve much. Before, under Windows, I had a very good link quality and had the entire 16mbit/s internet connection at disposal, now I can only get about 3-5Mbit/s. better then nothing, but still pretty bad! The "TX power" is fixed on 20dBm and iwconfig says, that the "Power Management" is off... Maybe the power of the module is set too low?... UPDATE2: I figured that 20dBm is a normal power output. I even tried to change the power using iwconfig wlan0 txpower INTEGERHERE but, obviously my "Card" does not support more then 20. More would probably be illegal as well, so I won't even use more then 20. I guess that I will have to figure out a way, or maybe just switch cards. Are the Mailboard-USB-Connectors on a laptop of the same property as the standard external ones? If so, I could simply solder a micro Wirelless N Adapter onto the board :)

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• Finding work as a college student

  - by lightburst

  I'm a 3rd year CS student. I'm currently really, really, bored and tired of cheap school programming(I go to a fairly respectable(albeit not top) university in my country, but, really, it's not MIT) so I've been thinking about getting a part-time dev job for a long while now. I'm not some hotshot programmer or anything, but "Add/Delete XYZ class objects to list" or "Do this web feature/pattern in PHP" does get old after a few semesters. I also only learned(heard?) of programming when I entered college, so the duration of me being in contact with any code is short. I can't really apply as an intern as I have not accumulated the necessary credits yet to do that so I was thinking of selling myself as a part-time dev. I still need to go to school, and don't want to subject myself to living two lives. Plus, I think I'd have better chances considering my lack of things to write on the resume. The only language I know at heart is C (I've written several pointer-oriented stuff on my freshman year, which is apparently pretty leet(for some reason), or so Joel says. That sort of boosted my morale a bit) but I've worked with several other languages only for the sake of course work such as C#/Java/PHP/ASM. My only user-worthy project was a recursive quicksort simulator I wrote for class using GTK+ that used a textbox to output the progress. I also have not taken the compiler theory class yet, or my thesis. All that being said, I wonder if any legitimate software company(big or small) would hire somebody like me considering all that. If there are companies that do accept anybody like me, would I be doing programming or maybe just be a tester or something? Would anybody hire me as a dev at all? I know I don't have much(not even a degree) but what I lack in experience, I compensate with interest? I am less interested in websites and 'management' software(no offense or anything. also, most of the places here ONLY have those), and more into 'process driven'(I'm not sure how to call it) and system software. I have my eyes on a startup that sells basically an extension of Google Drive, but I feel like I'm too 'risky' for them. Oh, I'm also 19 if that means anything. We're not K-12 so kids go to college earlier than in the US.

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• Forms&Reports upgrade characterset issues

  - by Lukasz Romaszewski

  Hello,This quick post is based on my findings during recent IMC workshops, especially those related to upgrading the Forms 6i/9i/10g applications to Forms 11g platform. The upgrade process itself is pretty straightforward and it basically requires recompiling your Forms application with a latest version of frmcmp tool. For some cases though, especially when you migrate from Forms 6i which is a client-server architecture to a 3-tier web solution (Forms 11g), you need to rewrite some parts of your code to make it run on new platform. The things you need to change range from reimplementing (using webutil library) typical client-site functionality like local IO operation, access to WinAPI, invoking DLLs etc. to changing deprecated or obsolete APIs like RUN_PRODUCT to RUN_REPORT_OBJECT. To automate those changes Oracle provides complete Java API  which allows you to manipulate the code and structure of you modules (JDAPI). To make it even easier we can use Forms Migration Assistant tool (written in Java using JDAPI) which is able to replace all occurrences of old API entries with their 11g equivalents or warn you when the replacement is not possible. You can also add your own replacement definitions in the search_replace.properties file. But you need to be aware of some issues that can be encountered using this tool. First of all if you are using some hard-coded text inside your triggers you may notice that after processing them by the Migration Assistant tool the national characters may be lost. This is due to the fact that you need to explicitly tell Java application (which MA really is) what kind of characterset it should use to read those text properly. In order to do that just add to a script calling MA the following line:  export JAVA_TOOL_OPTIONS=-Dfile.encoding=<JAVA_ISO_ENCODING>  when the particular encoding must match the NLS_LANG in your Forms Builder environment (for example for Polish characterset you need to use ISO-8859-2).Second issue you can encounter related to national charactersets is lack of national symbols in you reports after migration. This can be solved by adding appropriate NLS_LANG entry in your reports environment. Sometimes instead of particular characterset you see "Greek characters" in your reports. This is just default font used by reports engine instead of the one defined in your report. To solve it you must copy fonts definitions from your old environment (e.g. Forms 10g installation) to appropriate directory in new installation (usually AFM folder). For more information about this and other issues please refer to https://support.oracle.com/CSP/main/article?cmd=show&type=NOT&doctype=BULLETIN&id=1297012.1at My Oracle Support site. That's all for today, stay tuned for more posts on this topic! Lukasz

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• how to convert avi (xvid) to mkv or mp4 (h264)

  - by bcsteeve

  Very noob when it comes to video. I'm trying to make sense of what I"m finding via Google... but its mostly Greek to me. I have a bunch of Avi files that won't play in my WD TV Play box. Mediainfo tells me they are xvid. Specs for the box show that should be fine... but digging through forums says its hit-and-miss. So I'd like to try converting them to h264 encoded MKV or mp4 files. I gather avconv is the tool, but reading the manual just has me really really confused. I tried the very basic example of: avconv -i file.avi -c copy file.mp4 it took less than 4 seconds. And it worked... sort of. It "played" in that something came up on the screen... but there was horrible artifacting and scenes would just sort of melt into each other. I want to preserve quality if possible. I'm not concerned about file size. I'm not terribly concerned with the time it takes either, provided I can do them in a batch. Can someone familiar with the process please give me a command with the options? Thank you for your help. I'm posting the mediainfo in case it helps: General Complete name : \\SERVER\Video\Public\test.avi Format : AVI Format/Info : Audio Video Interleave File size : 189 MiB Duration : 11mn 18s Overall bit rate : 2 335 Kbps Writing application : Lavf52.32.0 Video ID : 0 Format : MPEG-4 Visual Format profile : Advanced Simple@L5 Format settings, BVOP : 2 Format settings, QPel : No Format settings, GMC : No warppoints Format settings, Matrix : Default (H.263) Muxing mode : Packed bitstream Codec ID : XVID Codec ID/Hint : XviD Duration : 11mn 18s Bit rate : 2 129 Kbps Width : 720 pixels Height : 480 pixels Display aspect ratio : 16:9 Frame rate : 29.970 fps Standard : NTSC Color space : YUV Chroma subsampling : 4:2:0 Bit depth : 8 bits Scan type : Progressive Compression mode : Lossy Bits/(Pixel*Frame) : 0.206 Stream size : 172 MiB (91%) Writing library : XviD 1.2.1 (UTC 2008-12-04) Audio ID : 1 Format : MPEG Audio Format version : Version 1 Format profile : Layer 3 Mode : Joint stereo Mode extension : MS Stereo Codec ID : 55 Codec ID/Hint : MP3 Duration : 11mn 18s Bit rate mode : Constant Bit rate : 192 Kbps Channel(s) : 2 channels Sampling rate : 48.0 KHz Compression mode : Lossy Stream size : 15.5 MiB (8%) Alignment : Aligned on interleaves Interleave, duration : 24 ms (0.72 video frame)

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