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  • 12.04 Ubuntu studio PREEMPT_RT kernel options

    - by Nate Iverson
    My audio processing needs require a preempt_rt kernel. I roughly followed the guide: https://wiki.ubuntu.com/KernelTeam/GitKernelBuild with a little help from: https://rt.wiki.kernel.org/index.php/RT_PREEMPT_HOWTO Currently I am using the 3.4 branch (which is the most recent at the time of this post): http://www.kernel.org/pub/linux/kernel/projects/rt/ I think I have a reasonable kernel config ( for my machine at least ). Multiple trials confirm I need the option: CONFIG_PREEMPT_RT_FULL=y I have the following questions: Is anyone maintaining a recent CONFIG_PREEMPT_RT_FULL kernel in a ppa? Is there any interest in providing a CONFIG_PREEMPT_RT_FULL in the official ubuntu-studio distribution? Does anyone have recent config pointers for a CONFIG_PREEMPT_RT_FULL kernel?

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  • Online Introduction to Relational Databases (and not only) with Stanford University!

    - by Luca Zavarella
    How many of you know exactly the definition of "relational database"? What exactly the adjective "relational" refers to? Many of you allow themselves to be deceived, thinking this adjective is related to foreign key constraints between tables. Instead this adjective lurks in a world based on set theory, relational algebra and the concept of relationship intended as a table.Well, for those who want to deep the fundamentals of relational model, relational algebra, XML, OLAP and emerging "NoSQL" systems, Stanford University School of Engineering offers a public and free online introductory course to databases. This is the related web page: http://www.db-class.com/ The course will last 2 months, after which there will be a final exam. Passing the final exam will entitle the participants to receive a statement of accomplishment. A syllabus and more information is available here. Happy eLearning to you!

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  • Tutoriel Java : Comprendre le fonctionnement de RMI (Remote Method Invocation), par Alain Defrance

    Bonjour, Le RMI (ou Remote Method Invocation) est très souvent utilisé, soit directement, soit dans des couches sous-jacentes. RMI est par exemple utilisé pour exposer des EJB SessionBeans. Notre objectif va être de démystifier RMI en comprenant ses méchanismes. Nous allons analyser comment une invocation à distance est possible en allant jusqu'a implémenter notre propre version allégée de RMI. Bien entendu, afin de nous focaliser sur les objectifs de cet article, certains prérequis sont nécessaires. Aucun rappel sur l'utilisation la gestion d'un réseau en Java ne sera fait. Article disponible ici : http://alain-defrance.developpez.com...2SE/micro-rmi/...

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  • Do NOT remove the reference to System.Core from your VS2010 Project

    - by Lee Brandt
    One of the things I routinely do when adding a new class library project, is remove all references and just add them back in as I need them. That is NOT a good idea for Visual Studio 2010. When I DID need System.Core, and went to add it back, this is what I got: "A reference to 'System.Core' could not be added. This component is automatically referenced..." After some Googling I found this article: http://connect.microsoft.com/VisualStudio/feedback/details/525663/cannot-remove-system-core-dll-reference-from-a-vs2010-project It tells you to add it back manually. Here is the part that needs back in the project file. After the last PropertyGroup node, add this node:   <ItemGroup>     <Reference Include="System.Core" />   </ItemGroup> You should be good to go again. Hope this helps.

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  • Project Euler 9: (Iron)Python

    - by Ben Griswold
    In my attempt to learn (Iron)Python out in the open, here’s my solution for Project Euler Problem 9.  As always, any feedback is welcome. # Euler 9 # http://projecteuler.net/index.php?section=problems&id=9 # A Pythagorean triplet is a set of three natural numbers, # a b c, for which, # a2 + b2 = c2 # For example, 32 + 42 = 9 + 16 = 25 = 52. # There exists exactly one Pythagorean triplet for which # a + b + c = 1000. Find the product abc. import time start = time.time() product = 0 def pythagorean_triplet(): for a in range(1,501): for b in xrange(a+1,501): c = 1000 - a - b if (a*a + b*b == c*c): return a*b*c print pythagorean_triplet() print "Elapsed Time:", (time.time() - start) * 1000, "millisecs" a=raw_input('Press return to continue')

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  • Le monde sur le point de se « noyer dans les données » selon le président d'Oracle qui prédit une crise du stockage et du traitement

    Le monde sur le point de se « noyer dans les données » Selon le président d'Oracle qui prédit une crise du stockage et de traitement Dans une déclaration au Times de Londres, le coprésident d'Oracle Mark Hurd a évoqué le sujet de « la croissance exponentielle » des données. Il prédit que celle-ci soit sur le point de déclencher un problème majeur dans les opérations de stockage, de traitement et d'analyse en temps réel. [IMG]http://idelways.developpez.com/news/images/oracle-marc-hurd.jpg[/IMG] Mark Hurd Selon Hurd, le nombre de dispositifs connectés à internet et fournissant des données pour les entreprises va croître po...

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  • SQLAuthority News – Various Microsoft SQL Server Documentations Available for Download

    - by pinaldave
    Microsoft has recently released various SQL Server related documentations and here I have listed them here for quick reference. Microsoft SQL Server Protocol Documentation The Microsoft SQL Server protocol documentation provides technical specifications for Microsoft proprietary protocols that are implemented and used in Microsoft SQL Server 2008. Microsoft SQL Server Protocol Documentation The SQL Server data portability documentation explains various mechanisms by which user-created data in SQL Server can be extracted for use in other software products. These mechanisms include import/export functionality, documented APIs, industry standard formats, or documented data structures/file formats. SQL Server Standards Support Documentation The SQL Server standards support documentation provides detailed support information for certain standards that are implemented in Microsoft SQL Server. Microsoft Product Support Reports Download the scripted system configuration gathering tools. The Microsoft Product Support Reports utility facilitates the gathering of critical system and logging information used in troubleshooting support issues. Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: PostADay, SQL, SQL Authority, SQL Download, SQL Query, SQL Server, SQL Tips and Tricks, T SQL, Technology

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  • Microsoft Press Deal of the day 4/Sep/2012 - Programming Microsoft® SQL Server® 2012

    - by TATWORTH
    Today's deal of the day from Microsoft Press at http://shop.oreilly.com/product/0790145322357.do?code=MSDEAL is Programming Microsoft® SQL Server® 2012 "Your essential guide to key programming features in Microsoft® SQL Server® 2012 Take your database programming skills to a new level—and build customized applications using the developer tools introduced with SQL Server 2012. This hands-on reference shows you how to design, test, and deploy SQL Server databases through tutorials, practical examples, and code samples. If you’re an experienced SQL Server developer, this book is a must-read for learning how to design and build effective SQL Server 2012 applications."

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  • How to fix Jdeveloper 11.1.1.2 Hang

    - by nestor.reyes
    Is Jdeveloper hanging on you when use the XPATH expression Builder? Have a look at the Release notes for 11.1.1.2. This will relieve a lot of frustration.http://download.oracle.com/docs/cd/E15523_01/doc.1111/e14770/bpel.htm#BABECHBF16.1.6 Oracle JDeveloper May Hang When Using the Expression Builder Using the Expression Builder to build XPath expressions may cause Oracle JDeveloper to hang. If that happens, perform the following steps: Kill the Oracle JDeveloper process. Restart Oracle JDeveloper. Select Tools > Preferences > SOA, and deselect the Validate Expression checkbox. After performing these steps, Oracle JDeveloper should no longer hang.

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  • 7 Reasons for Abandonment in eCommerce and the need for Contextual Support by JP Saunders

    - by Tuula Fai
    Shopper confidence, or more accurately the lack thereof, is the bane of the online retailer. There are a number of questions that influence whether a shopper completes a transaction, and all of those attributes revolve around knowledge. What products are available? What products are on offer? What would be the cost of the transaction? What are my options for delivery? In general, most online businesses do a good job of answering basic questions around the products as the shopper engages in the online journey, navigating the product catalog and working through the checkout process. The needs that are harder to address for the shopper are those that are less concerned with product specifics and more concerned with deciding whether the transaction met their needs and delivered value. A recent study by the Baymard Institute [1] finds that more than 60% of ecommerce site visitors will abandon their shopping cart. The study also identifies seven reasons for abandonment out of the commerce process [2]. Most of those reasons come down to poor usability within the commerce experience. Distractions. External distractions within the shopper’s external environment (TV, Children, Pets, etc.) or distractions on the eCommerce page can drive shopper abandonment. Ideally, the selection and check-out process should be straightforward. One common distraction is to drive the shopper away from the task at hand through pop-ups or re-directs. The shopper engaging with support information in the checkout process should not be directed away from the page to consume support. Though confidence may improve, the distraction also means abandonment may increase. Poor Usability. When the experience gets more complicated, buyer’s remorse can set in. While knowledge drives confidence, a lack of understanding erodes it. Therefore it is important that the commerce process is streamlined. In some cases, the number of clicks to complete a purchase is lengthy and unavoidable. In these situations, it is vital to ensure that the complexity of your experience can be explained with contextual support to avoid abandonment. If you can illustrate the solution to a complex action while the user is engaged in that action and address customer frustrations with your checkout process before they arise, you can decrease abandonment. Fraud. The perception of potential fraud can be enough to deter a buyer. Does your site look credible? Can shoppers trust your brand? Providing answers on the security of your experience and the levels of protection applied to profile information may play as big a role in ensuring the sale, as does the support you provide on the product offerings and purchasing process. Does it fit? If it is a clothing item or oversized furniture item, another common form of abandonment is for the shopper to question whether the item can be worn by the intended user. Providing information on the sizing applied to clothing, physical dimensions, and limitations on delivery/returns of oversized items will also assist the sale. A photo alone of the item will help, as it answers some of those questions, but won’t assuage all customer concerns about sizing and fit. Sometimes the customer doesn’t want to buy. Prospective buyers might be browsing through your catalog to kill time, or just might not have the money to purchase the item! You are unlikely to provide any information in contextual support to increase the likelihood to buy if the shopper already has no intentions of doing so. The customer will still likely abandon. Ensuring that any questions are proactively answered as they browse through your site can only increase their likelihood to return and buy at a future date. Can’t Buy. Errors or complexity at checkout can be another major cause of abandonment. Good contextual support is unlikely to help with severe errors caused by technical issues on your site, but it will have a big impact on customers struggling with complexity in the checkout process and needing a question answered prior to completing the sale. Embedded support within the checkout process to patiently explain how to complete a task will help increase conversion rates. Additional Costs. Tax, shipping and other costs or duties can dramatically increase the cost of the purchase and when unexpected, can increase abandonment, particularly if they can’t be adequately explained. Again, a lack of knowledge erodes confidence in the purchase, and cost concerns in particular, erode the perception of your brand’s trustworthiness. Again, providing information on what costs are additive and why they are being levied can decrease the likelihood that the customer will abandon out of the experience. Knowledge drives confidence and confidence drives conversion. If you’d like to understand best practices in providing contextual customer support in eCommerce to provide your shoppers with confidence, download the Oracle Cloud Service and Oracle Commerce - Contextual Support in Commerce White Paper. This white paper discusses the process of adding customer support, including a suggested process for finding where knowledge has the most influence on your shoppers and practical step-by-step illustrations on how contextual self-service can be added to your online commerce experience. Resources: [1] http://baymard.com/checkout-usability [2] http://baymard.com/blog/cart-abandonment

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  • SQLBeat Podcast – Episode 8 – Interviewing Patrick LeBlanc On Interviewing

    - by SQLBeat
    In this episode of the SQLBeat Podcast (@SQLBeat on twitter) I had a chance to speak with Patrick LeBlanc, currently with Microsoft and former SQL Server MVP. We spend a good amount of time talking about his current gig and his apparent fascination with almost never being dressed. Fortunately he had on some jeans and a shirt for this interview, though he did look at bit dozy because he had not slept the night before. With his help we came up with what is going to be a recurring section on the podcast and that is failed or embarrassing job interviews. Patrick has quite a humiliating one for the launch of “Tell Me About Your Worst Job Interview”. Ok, I can come up with a better title for that section surely. Anyway, have a listen and if you can think of something better, let me know in the comments section. <source src="http://www.simple-talk.com/blogbits/rodneylandrum/Patrick_LeBlanc.ogg" type="audio/ogg; codecs="vorbis"

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  • SQL SERVER – Video – Performance Improvement in Columnstore Index

    - by pinaldave
    I earlier wrote an article about SQL SERVER – Fundamentals of Columnstore Index and it got very well accepted in community. However, one of the suggestion I keep on receiving for that article is that many of the reader wanted to see columnstore index in the action but they were not able to do that. Some of the readers did not install SQL Server 2012 or some did not have good machine to recreate the big table involved in the demo. For the same reason, I have created small video for that. I have written two more article on columstore index. Please read them as followup to the video: SQL SERVER – How to Ignore Columnstore Index Usage in Query SQL SERVER – Updating Data in A Columnstore Index Reference: Pinal Dave (http://blog.SQLAuthority.com) Filed under: Pinal Dave, PostADay, SQL, SQL Authority, SQL Index, SQL Performance, SQL Query, SQL Scripts, SQL Server, SQL Tips and Tricks, T SQL, Technology, Video

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  • Would this violate any copyright issues?

    - by Farhad
    I am currently publishing a paper on skin detection. However, I need to find the appropriate histogram bin size for each colorspace. I recently came upon a paper that published what it found to be the ideal bin size. The paper can be found at: http://www.inf.pucrs.br/~pinho/CG/Trabalhos/DetectaPele/Artigos/OPTIMUM%20COLOR%20SPACES%20FOR%20SKIN%20DETECTION.pdf. I am specifically talking about Table 1. If I cite the source, would it be okay for me to use data from the table? Note that I cannot contact the author of the paper.

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  • Beat detection, weird detection

    - by Quincy
    I made this soundanalyzer class to detect beats in songs : // put it on pastebin for the big size, will put it here if people rather want that. pastebin.com/8PdgZPP3 but for some reason its only detecting beats from 637 sec to around 641(sec) and I have no idea why. I know the beats are being inserted from multiple bands since I am finding duplicates and it seems as its assigning a beat to each instant energy value in between those values. Its modeled after this : http://www.flipcode.com/misc/BeatDetectionAlgorithms.pdf So why won't the beats properly register ?

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  • Performance: recursion vs. iteration in Javascript

    - by mastazi
    I have read recently some articles (e.g. http://dailyjs.com/2012/09/14/functional-programming/) about the functional aspects of Javascript and the relationship between Scheme and Javascript (the latter was influenced by the first, which is a functional language, while the O-O aspects are inherited from Self which is a prototyping-based language). However my question is more specific: I was wondering if there are metrics about the performance of recursion vs. iteration in Javascript. I know that in some languages (where by design iteration performs better) the difference is minimal because the interpreter / compiler converts recursion into iteration, however I guess that probably this is not the case of Javascript since it is, at least partially, a functional language.

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  • Setting up SSO in ADF Security-enabled application

    - by Dmitry Nefedkin
    I'm continuing a series of post/videos regarding  the setting up ADF applications in the real world. This time I'm going to present how to set up Single Sign-On (SSO) and Single Logout (SLO) for ADF application using Oracle Access Manager 11g.  In this 40-min video we are going to explore the following topics: Review the demo environment; Install Oracle HTTP Server 11g (OHS) instance as a reverse proxy for Oracle Weblogic Server; Install OAM 11g Web Gate inside OHS; Modify and redeploy the ADF application for use with OAM; Configure OAM Identity Asserter in ADF domain; Configure single logout (SLO); Test SSO and SLO  

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  • UK Connected Systems User Group - Udi Dahan Event Topic change

    - by Michael Stephenson
    Hi Just wanted to get the word out about a change to the may user group event.  Udi Dahan will present a new topic which he has not presented in the UK before.  Details below. To register for this event please refer to: http://ukconnectedsystemsusergroup.org/UpcomingEvents.aspx Title: High Availability - A Contrarian View   Abstract: Many developers are aware of the importance of high availability, critically analyzing any single points of failure in the infrastructure. Those same developers rarely give a second thought to the periods of time when a system is being upgraded. Even if all the servers are running, most systems cannot function in-between versions. Yet with the increased pace of business, users are demanding ever more frequent releases. The poor maintenance programmers and system administrators are left holding the bag long after the architecture that sealed their fate was formulated. Join Udi for some different perspectives on high availability - architecture and methodology for the real world.

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  • How to install google chrome from the official repos?

    - by Suhaib
    I followed this question : How to install Chrome browser properly via command line? However, It is not the same as the one mentioned in google's website : http://www.google.com/linuxrepositories/ I want to do this one instead. The process is: On an APT-based system (Debian, Ubuntu, etc.), download the key and then use apt to install it. wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add - sudo apt-get update what would be the next step ? I tried sudo apt-get intsall google-chrome and I ended up with this error Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package google-chrome

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  • Suggestions on managing social media accounts

    - by Rob
    As a company we now have Facebook, LinkedIN, Twitter and now Google+, is there a way to easily manage all these accounts without having to log into them individually? Things like posting content to each one is becoming a full time job in itself, is there a way to post once that in turn posts to all other accounts? I used to use http://ping.fm/ a long time ago, has there been any advancements in something similar to this? With friend lists, news feeds etc etc for each one, I wish there was a way to manage them all in one place with a service/tool!

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  • Black Screen on boot on a Lenovo IdeaPad Z575

    - by Davis
    So I tried to install Wubi. On boot, when I select Ubuntu it starts then I get a purple screen then black screen. My monitor is like completely off. So then I have to hold down my power button and shut it off. I boot it up then held shift and typed in "nomodeset" after the second to last line, but then when it boot it went into the command prompt thing and just stopped after "checking battery" or something. This is my first time installing any linux distro. I want to install it alongside windows and dual boot it with wubi because that is easy and simple. This is the laptop I have: http://www.newegg.com/Product/Product.aspx?Item=N82E16834246328

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  • Bluetooth drivers for Dell Latitude D830

    - by blomqvist
    I haven’t been using Bluetooth on my D830 before but now I got myself a Bluetooth mouse in order to get rid of the receiver for a wireless mouse. And then I discovered that Bluetooth did not work anymore after I installed Win7. Browsing Dell support pages for a a driver found me one (browsing by computer model etc..). But that drivers does not work. Installation looks ok and everything but no devices are found. i kept looking and found this driver, also at Dells site: http://support.us.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R231570&formatcnt=1&libid=0&typeid=-1&dateid=-1&formatid=-1&fileid=333170 And that one worked!  Problem solved an I am now happily using my Bluetooth mouse instead.

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  • New York City!!

    - by Chris Williams
    I'm headed to NYC to speak at the NYPC VB SIG (user group: http://www.nypcvb.org) on Monday Feb 7 at 6pm. I'll actually be arriving on Saturday (2/5/11) and hanging around through the weekend until the meeting. It's my 3rd time in New York City, but the first time was 20 years ago, so I'm not sure that one counts. Aside from the usual touristy things to do, like seeing the Statue of Liberty and the Empire State Building (both of which are on my list), what are some other cool things to check out? Got a favorite pizza place? A cool comic shop? Local hangout... Tell me about it!

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  • Project Euler 5: (Iron)Python

    - by Ben Griswold
    In my attempt to learn (Iron)Python out in the open, here’s my solution for Project Euler Problem 5.  As always, any feedback is welcome. # Euler 5 # http://projecteuler.net/index.php?section=problems&id=5 # 2520 is the smallest number that can be divided by each # of the numbers from 1 to 10 without any remainder. # What is the smallest positive number that is evenly # divisible by all of the numbers from 1 to 20? import time start = time.time() def gcd(a, b): while b: a, b = b, a % b return a def lcm(a, b): return a * b // gcd(a, b) print reduce(lcm, range(1, 20)) print "Elapsed Time:", (time.time() - start) * 1000, "millisecs" a=raw_input('Press return to continue')

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  • Oracle... and InfiniBand.

    - by jenny.gelhausen
    Beginning Sunday, 14th March 2010 the OpenFabrics Alliance has been hosting its annual conference in Sonoma, California. On Monday morning, Tim Shetler - VP of Product Management at Oracle - addressed a conference room full to the brim with the industry's InfiniBand luminaries. That same afternoon, Sumanta Chatterjee, Senior Director of Development at Oracle, was publicly lauded by moderator Bill Boas for being a long-standing, pivotal driver and crucial member of the community. A testament to InfiniBand's building momentum, it is no surprise to find it at the core of Oracle's flagship product, the Sun Oracle Database Machine. var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); try { var pageTracker = _gat._getTracker("UA-13185312-1"); pageTracker._trackPageview(); } catch(err) {}

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  • Primeiras considerações sobre TypeScript (pt-BR)

    - by srecosta
    É muito, muito cedo para ser realmente útil mas é bem promissor.Todo mundo que já trabalhou com JavaScript em aplicações que fazem realmente uso de JavaScript (não estou falando aqui de validação de formulário, ok?) sabe o quanto é difícil para uma pessoa, quiçá um time inteiro, dar manutenção nele conforme ele vai crescendo. Piora muito quando o nível de conhecimento de JavaScript que as pessoas da equipe têm varia muito e todos têm que meter a mão, eventualmente.Imagine a quantidade de JavaScript que existe por trás destas aplicações que rodam no browser tal como um Google Maps ou um Gmail ou um Outlook? É insano. E mesmo em aplicações que fazem uso de Ajax e coisas do tipo, com as telas sendo montadas “na unha” e o servidor servindo apenas de meio de campo para se chegar ao banco de dados, não é pouca coisa.O post continua no meu blog em http://www.srecosta.com/2012/11/05/primeiras-consideracoes-sobre-typescript/Grande abraço,Eduardo Costa

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