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• Why using the word "mechanism" in CS?

  - by Nick Rosencrantz

  I'm not sure about the usage of the word "mechanism" when in fact most of the time what is meant is an algorithm. For instance there's talk about Java's "thread-scheduling mechanism" - why not call it an algorithm and why borrow a term from mechanics where relations sometimes are the opposites than of computer science? I'm aware that an algorithm is considered a "mechanical solution" but is this really the case in fact when a lot of algorithm don't have mechanical representations for instance a file-sharing network that gets quicker and faster as the usage grows, that would be the reverse of a mechanical structure that would go slower when usage grows.

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• Zookeeper naming service [closed]

  - by kolchanov

  I need a recommendation for naming service implementation. We are ISV and we have a lot of applications (services) with very different protocols such as http (Rest), low level tcp, amqp, diameter, telco protocols Rx, Ry, Ud and many others. We want to simplify configuration, deployment and service discovery procees and it seems that It's time to create central configuration registry. So I have few questions: - is zookeeper suitable for this purpose? - does exists more suitable and more special solution? - best practice for service naming for discoverin. Any standards? - recommendation for service configuration data structure Also we are keeping in mind future tasks For dynamic application distribution in a private cloud. Could you share your real life experience?

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• Keyboard Layouts Plugin forgets settings, unable find workaround

  - by Honza Javorek

  I use Xubuntu. As everyone knows, Keyboard Layouts Plugin is very, very buggy and it still forgets my settings. It drives me crazy - I have to set them again and again every time I wake up or turn on my laptop. So I found a solution - put into my .bashrc this: setxkbmap -option '' -option grp:alt_shift_toggle cz,us -variant querty That should set my toggle to Alt+shift and my layouts to Czech QUERTY and plain US English as a second one. Voilà, that seems to work! I could use Keyboard Layouts Plugin only as an indicator, that's okay. However, it doesn't work well. The problem is that it ignores -variant setting. More or less. In Keyboard Layouts Plugin I actually see Czech QUERTY selected, but in reality my keyboard types QUERTZ. That's insane :-( Could anyone help, please?

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• A program/command to help translate multiple file names

  - by cipricus

  I have hundreds of files with different names that I want to translate into a different language. Is there an application/CLI action that would allow me to copy all this names as in a list/table and then, after having translated them, to paste them back into the list/table, or that would allow a procedure somewhat similar to "Rename" in Thunar but with a more complex action closer to what I have described? (I am in Lubuntu and I prefer not to use Nautilus due to unwanted interference with LXDE/pcmanfm desktop and LXPanel. If there is a solution in Nautilus please provide it but try to give an alternative if possible.)

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• Interpolation gives the appearance of collisions

  - by Akroy

  I'm implementing a simple 2D platformer with a constant speed update of the game logic, but with the rendering done as fast as the machine can handle. I interpolate positions between actual game updates by just using the position and velocity of objects at the last update. This makes things look really smooth in general, but when something hits a wall/floor, it appears to go through the wall for a moment before being positioned correctly. This is because the interpolator is not taking walls into account, so it guesses the position into walls until the actual game update fixes it. Are there any particularly elegant solutions for this? Simply increasing the update rate seems like a band-aid solution, and I'm trying to avoid increasing the system reqs. I could also check for collisions in the actual interpolator, but that seems like heavy overhead, and then I'm no longer dividing the drawing and the game updating.

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• Frequent GUI pauses in Ubuntu 13.04 / Unity / Intel HD4000

  - by Simon

  I'm experiencing very frequent (and regular) GUI pauses on my system. Every 30 seconds (pretty much exactly) the GUI will freeze for maybe .25 to .5 seconds. The mouse stops moving, keys stop echoing and a stopwatch timer briefly pauses. I'm using the Intel Graphics driver available from: https://download.01.org/gfx/ubuntu/13.04/main I've looked in a few places and tried a few things for a solution: I've checked cron and anacron for scheduled processes. I've disabled background processes (eg mysql, postgres, apache) not that these were doing anything anyway I've checked the following posts and tried the suggestions there: Unity GUI pauses/freezes for less than a few seconds How to go about troubleshooting frequent system pauses I've watched the system using top and System Monitor and there are no spikes (or even blips) of cpu usage when the pauses occur. There are no obvious error messages in dmesg or syslog There is loads of free RAM (8GB+) and no swap usage If it helps it's a ZooStorm i5 laptop with a HD4000 GPU, 16GB Ram and an SSD. Any help / suggestions would be very gratefully received.

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• Crystal Reports: 3 New Uses For Sub Reports

  I hate sub reports and always consider them the last resort in any reporting solution. The negative effect on performance and maintainability is just not worth the easy ride they give the report writer. Nine times out of ten reporting requirements can be met using a little forethought and planning (and a solid understanding of formulas). With that said, there are a few novel ways of using sub reports which will not affect performance and actually prove a boon to the developer.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Crystal Reports: 3 New Uses For Sub Reports

  I hate sub reports and always consider them the last resort in any reporting solution. The negative effect on performance and maintainability is just not worth the easy ride they give the report writer. Nine times out of ten reporting requirements can be met using a little forethought and planning (and a solid understanding of formulas). With that said, there are a few novel ways of using sub reports which will not affect performance and actually prove a boon to the developer.Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• When would you want two references to the same object?

  - by HCBPshenanigans

  In Java specifically, but likely in other languages as well; When would it be useful to have two references to the same object? Example: Dog a = new Dog(); Dob b = a; Is there a situation where this would be useful? Why would this be a preferred solution to using a whenever you want to interact with the object represented by a? Edit: Can I just say that all of your dog related examples are Delightful!

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• ISACA Information Security & Risk Management Conference, Nov 14-16

  - by Troy Kitch

  Please join Oracle, as a platinum sponsor, at this year's ISACA Information Security and Risk Management Conference in Las Vegas, Nov 14-16. This year’s conference offers up to 32 CPE hours and is designed to meet the needs of information security, governance, compliance, and risk management professionals. The event builds on and includes the key elements of information security, governance, compliance and risk management practices, and offers a fresh perspective on current and future trends. As provider of the world’s most complete, open, and integrated business software and hardware systems, Oracle can uniquely safeguard your information throughout its entire lifecycle and is the recognized leader in Data Security, Identity Management, and Governance, Risk, and Compliance solutions. Also, attend the Oracle Megatrends Session, Gone in 60 Seconds: Mitigating Database Security Risk and stop by our booth, # 100 & #102, to meet with Oracle Security Solution experts, see live product demos, and more. Learn more and register.

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• Internet Timeouts with TP-Link TL-WN821N wireless usb stick - existing solutions dont work

  - by Sheena

  I'm running Ubuntu12.04 and I'm trying to get a TP-Link TL-WN821N to work. The solution from Internet Timeouts with TP-Link TL-WN821N v2 wireless usb stick didn't work for me. Neither has anything else... I've installed rtl8192cu as per instructions I found elsewhere to no avail. The symptoms I am experiencing are: When I plug in the device the PC can see and connect to wireless networks fine. The network I'm using has internet access and the signal strength is pretty strong. I can't ping and I can't browse the internet (timeout). Any ideas? I'm not sure what the next step would be or what information would be useful at this point.

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• Setting coding priorities

  - by dotnetdev

  Hi, In the dev shops I've worked in, nobody has ever mentioned "coding priorities". I read this in a book or site somewhere, and sets the expectation of what priority should be first in the code. In places where this is not specified, what should the first priority be? It may sound simple to say "do what the business need requires", but that could be at the expense of performance/maintainability. Many people say maintainability first, regardless, some say fulfill the need regardless. I am a young developer, so I am probably missing the point somewhere. Of course, programming is engineering and tough because you can never have the perfect solution. Thanks

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• Icon zoom on gnome panel with mouseover?

  - by brent.with.a.mustache

  I'm actually quite surprised that I couldn't find any information regarding this question through simple google-ing; I would think that it was something of a no-brainer kind of question. I'm basically trying to figure out if there's any way to have the icons in the side panel/favorites bar magnify as you mouseover them, much like you'd see in any the popular launcher programs (i.e. rocket dock or apple's launcher)? I'm on a netbook with a rather limited amount of screen real estate to work with, so the icons depicting my "favorite applications" have been reduced to a permanent, unsatisfying handful of pixels. Again, it seems to me that this should be a fairly obvious feature to include in the options for the panel, so I'm hoping that there's an easy solution. Unfortunately, I haven't found any way to make this happen, so any help would be appreciated. Here's a screenshot :squint: http://i.imgur.com/OpMIF.jpg -- ubuntu 11.10; gnome 3; hp mini 110

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• Inkscape won't open .cdr files

  - by Bora George

  Hello I'm running Kubuntu 12.04 and I've installed Inkscape because I need to edit a .cdr file, Inkscape works like normal but the sole task I need it to do is edit said .cdr file which I understand it should be capable off by default. Whenever I try to open the file though I get the following error: UniConvertor failed: The eror itself is longer but what it seems to be saying that it can't find this application, and I myself haven't found it in the package manager. If someone has experienced something similar or has a simple solution for editing cdr's I'm no artist I just need to change some names, I would be very gratefull. The full error.

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• How to make JWM work in Ubuntu 12.04?

  - by alba

  I have installed the JWM on Ubuntu 12.04 via the Software Centre, but it doesn't work. When I choose the JWM session from LightDM, it only shows a black screen. It worked when I had another computer with Ubuntu 11.10, where I had the same problem after the JWM installation. But once, by chance, I chose to start JWM from a Fluxbox session. And after that, i was able to start JWM also from LightDM. But this solution does not work for me on Ubuntu 12.04. JWM never starts.

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• Building a Roadmap for an IAM Platform

  - by B Shashikumar

  Identity Management is no longer a departmental solution, it has become a strategic part of every organization's security posture. Enterprises require a forward thinking Identity Management strategy. In our previous blog post on "The Oracle Platform Approach", we discussed a recent study by Aberdeen which showed that organizations taking a platform approach can reduce cost by as much as 48% and have 35% fewer audit deficiencies. So how does an organization get started with an Identity Management (IAM) Platform? What are the components of such a platform and how can an organization continuously evolve it for better ROI and IT agility. What are some of the best practices to begin an IAM deployment? To find out the answers and to learn how ot build a comprehensive IAM roadmap, check out this presentation which discusses how Oracle can provide a quick start to your IAM program.  Platform approach-series-building a-roadmap-finalv1 View more presentations from OracleIDM

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• Broken links in content reports when tracking subdomains with Google Analytics

  - by Rob Sobers

  I have a tracking code that I use on my main site and my blog, which is on a subdomain: www.example.com blog.example.com I have a single profile in Google Analytics. I use advanced segments to look at traffic to the main site vs. traffic to the blog. Problem 1: When I'm browsing my content reports under Standard Reporting, the "Page" column doesn't show the top-level or sub-domain, so I can't differentiate www.example.com/index.html from blog.example.com/index.html easily. According to the docs, this filter is supposed to make GA prepend the hostname to the page URL in your content reports, but it doesn't seem to work. Problem 2: When I click on the little "Open in new window" icon next to a given page in a content report line, it always assumes the page lives on www.example.com, so I get 404s when the page is actually on blog.example.com. Is there a good solution for these subdomain tracking problems?

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• joomla 2.5 : list links to articles in 2 columns

  - by semyon

  I have a Joomla! 2.5 website, and I have to add a lightbox popup that will contain links to all articles from a specific category(+subs). If anyone can suggest all-in-one solution, that will be great! But generally I'm asking, how to list links to all articles from a specific category and its sub-categories in two/three columns? I know I can set Category blog View to output only article links, without full/introtext, but in this case links will all be in one column. I need at least two. A possibility of grouping article links by subcategory would be great as well (but this is the thing I can live without). How can this be done? I'm looking for: a standard way of configuring this Template override (I'm using T3 framework) Custom extension any other method ...

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• New Podcast Available: Product Value Chain Management: How Oracle is Taking the Lead on Next Gen Enterprise PLM

  - by Terri Hiskey

  A new podcast on how Oracle is taking the lead in Enterprise PLM with our Product Value Chain solution is now available. In case you're not yet familiar with the concept of Product Value Chain, its an integrated business model powered by Oracle that offers executives the ability to collectively leverage enterprise Agile PLM, Product Data Hub, Enterprise Data Quality and AutoVue Enterprise Visualization and other industry-leading Oracle applications for incremental value. In this quick, 10 minute podcast, you'll hear John Kelley, VP PLM Product Strategy, and Terri Hiskey, Director, PLM Product Marketing, discuss Oracle's vision for next generation enterprise PLM: the Product Value Chain. http://feedproxy.google.com/~r/OracleAppcast/~3/jxAED7ugMEc/11525926_Enterprise_PLM_040612.mp3

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• Ubuntu DVR - what are the options?

  - by Alex D

  According to my research, the best solution to use ubuntu server as a DVR system would be ZoneMinder. is there any alternatives to zoneminder out there? I'm not really happy it only has a web interface to control/view my cameras. And it doesn't have an option to record video stream non-stop. Am I missing something in its configuration? And the thing I really disappointed, I cant find a way to control my PTZ camera with it. what do manufacturers sell along with their standalone linux powered dvr systems?

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• No graphics after installing AMD Catalyst 12.4 and installing the recommended updates afterwards

  - by Innonic

  Some days ago, I installed Ubuntu 12.04. Since I wanted to use dualview using an external display I installed the propriatary AMD Catalyst 12.4. The graphics are fine, but if I run the updates found by the updates manager, Ubuntu won't be able to start with graphics after reboot. I installed Ubuntu 3 times until I realized what the problem was. So now I got the basic installation with Catalyst running but I can't update the system. Is there any solution to this? Or can I somehow identify which update causes this? My System is a Lenovo y560 Ideapad (Intel Core i7, 8GB RAM, with AMD Radeon HD 6570M/5700 Series. Thank you in advance

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• Book about tcp, http, named pipe, shared memory, wcf and other inter-process communication protocol

  - by Samuel

  Recently, I had to create a program to send messages between two winforms executable. I used a tool with simple built-in functionalities to prevent having to figure out all the ins and outs of this vast quantity of protocols that exist. But now, I'm ready to learn more about the internals difference between each of theses protocols. I googled a couple of them but it would be greatly appreciate to have a good reference book that gives me a clean idea of how each protocol works and what are the pros and cons in a couple of context. Here is a list of nice protocols that I found: Shared memory TCP List item Named Pipe File Mapping Mailslots MSMQ (Microsoft Queue Solution) WCF I know that all of these protocols are not specific to a language, it would be nice if example could be in .net. Thank you very much.

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• Be careful when Git suppresses bin Folders

  - by Marko Apfel

  Initial situation Often for Visual Studio projects the typical content of a .gitignore file contains this line bin or [B|b]in It is used to avoid that Git tries to track compile outputs as repository relevant data. Problem But keep in mind: this will also suppress bin folders of additional stuff like frameworks and toolsets. For instance Microsoft.SDKs contains a folder named Bin with a lot of programs Simian contains a folder named bin with the program themselves If you store such artifacts also in the repository - according to the principle of a “self containing project” – you could lost the content in the bin folder! Solution Till yet I don’t have a good idea. So I verify for each new added toolset or framework whether it has or has not such a bin folder. If it has, then I must add this bin folder manually to the repository so that Git track it.

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• Can I get enough experience to get an industry job just by reading books?

  - by MahanGM

  I've been recently working with DirectX and getting familiar with game engines, sub-systems and have done game development for the last 5 years. I have a real question for those whom have worked in larger game making companies before. How is it possible to get to into these big game creators such as Ubisoft, Infinity Ward or EA. I'm not a beginner in my field and I'm going to produce a real nice 2D platform with my team this year, which is the result of 5 years 2D game creation experience. I'm working with prepared engines such as Unity3D or Game Maker software and using .Net with C# to write many tools for our production and proceeding in my way but never had a real engine programming experience 'till now. I'm now reading good books around this topic but I wanted to know: Is it possible to become an employee in big game company by just reading books? I mean beside having an active mind and new ideas and being a solution solver.

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• USB Mouse sleeping after 5 seconds when on battery

  - by yurividal

  My usb mouse sleeps after 5 seconds of inactivity when running on battery power. It wakes uo again when i press any button on the mouse. This is really annoying. I have made lsusb, and I noticed my mouse is Bus 001 Device 012: ID 04d9:2083 Holtek Semiconductor, Inc. I have checked my /sys/bus/usb/devices/usb1/power/autosuspend but it is already set to 0, and the directory usb1 has many subdirectories which also have autosuspend files, and i dont know how to edit them. Also, I would like a permanent solution, which would work for any mouse, on any of my 3 usb ports. Any ideas? Using: Ubuntu 12.04 64bit

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