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• Finding the displacment of a robot [closed]

  - by Jordan Brown

  I'm building a quadruped (4 legs 3 DOF) for my major work in electronics at high school. I need to know the displacement of the robot and I can't use an encoding wheel. I've done my research and I found a system where I use an accelerometer, gyroscope and a magnetometer to determine the displacement but I'm not sure how to code it. I'm using Arduino and will use compatible sensors. I would like to be able to implement something similar to this video which demonstrates the principles evaluated in this paper. I don't need to map the data on a screen, just be able to read its displacement from its last recorded position. EG. (Read Position) --- (Do "stuff") --- (Read Position) --- (Calculate displacement caused by "stuff")

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• samsung series 5 A6 ultrabook

  - by Én Cube

  i'm a fan of ubuntu, but for now i want my installation to be perfect for my new laptop, its a series 5 of samsung with A6 processor. Somebody suggest what to do? or mention any problems related to this? Im more concern of the drivers to increase its performance because i am to develop an android app. I need "i dont know" to make this unit run as fast as possible without any dangerous tradeoffs. Also i read some forum saying that their units are overheating. -_- somebody help me please. and also i want to switch to gnome 3. And last thing, is there any differences in performance if i use alongside, replace or custom in formatting?

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• Are Web Safe Colors Still Relevant?

  - by VxJasonxV

  I still remember one of my high school teachers lecturing us about the "web safe colors". A set of 216-256 colors that you should confine your designs to use, and nothing else besides them. Last I knew, Photoshop still has the "web safe" yield icon[1] on it's color picker. Are web safe colors still a concern? Outside of the obvious application (accessibility, legacy software versions, etc.), how much consideration should I give to limiting my color choice for my general audience? [1] Or was it the cube? I never remember.

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• Ubuntu 12.04 wallpaper problem when using two monitors

  - by jiomsa

  I am using two monitors, the main resolution is 1920x1080 and the secondary is 1440x900. Everything seems to work fine (with default drivers, fglrx crashes bad), besides windows opening in the wrong monitor (even when the main is set correctly), but now what I am trying to fix is the wallpaper problem, here's an image to explain it easier: http://i.imgur.com/msLRR.jpg It also happens with gradients. The secondary monitor is physically aligned like in the image, lower than the other, the wallpaper on the main screen seems to keep the size of the lower resolution, and then it start at the correct resolution the last part at right. Any way to fix this? I am using Ubuntu 12.04 with Gnome-Shell 3.4.1, the vga is a Radeon HD 6950 UPDATE I went to gnome-tweak-tool and disabled "Have file manager handle the desktop", now it looks ok on both monitors, but I can't have icons on my desktop, so I am still interested in solving it. UPDATE2 Disabling "Have file manager handle the desktop", in gnome-tweak-tool and then re-enabling it seems to work, but has to be done every time you turn on the PC.

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• New CodePlex Project&ndash;SPDeployRetract

  - by PointsToShare

  I have just finished a new CodePlex project named SPDeployRetract. This is a sophisticated PowerShell script that allows you to to deploy solutions and InfoPath forms with ease. It is especially beneficial because once you set up the instructions in the xml input, you can repeat the process in farm after farm without error. The script also allows for easy retraction. You may always retract the last deployment by setting the instructions to do so. This is possible because every action taken is recorded and old versions of each WSP are backed up for redeployment. Look it up in: http://spdeployretract.codeplex.com/ That’s all Folks!!

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• How do I suppress the "New release '12.10' available" message?

  - by cjm

  When I ssh into my Mythbuntu box, I get this message: Welcome to Ubuntu 12.04.1 LTS (GNU/Linux 3.2.0-32-generic x86_64) * Documentation: https://help.ubuntu.com/ New release '12.10' available. Run 'do-release-upgrade' to upgrade to it. Last login: <redacted> $ But I don't intend to upgrade to 12.10, because Mythbuntu recommends using LTS releases only. How do I suppress the "New release '12.10' available" message? I don't want to be notified until the next LTS release is available. I've already gone to Update Manager Settings Updates and selected "Notify me of a new Ubuntu version: For long-term support versions", but that didn't get rid of this message.

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• Game getting progressively laggier?

  - by Valentin Krummenacher

  I have a small game in HTML5 that uses socket.io to communicate with a node.js server. Now my problem is that, eversince I did my last update on it it seems to have something "chunk up" in the background making it laggier and laggier the longer it runs. In the update were a few temporary local variables being defined with var(you know, variables that are only used during one function and then not needed anymore) alongside with alot of other changes, and I am not even sure if this update or something else is causing this. Might the "var" have caused it? Or what other reasons might this strange complication have?

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• KC Java Users Group Presentation

  - by rodelljr

  Originally posted on: http://geekswithblogs.net/rodelljr/archive/2014/08/22/kc-java-users-group-presentation.aspxI would like to thank the KC Java Users Group for allowing me to do my presentation; Supporting Multiple Devices Part 2. In this talk, I discussed a Master/Detail application that runs on Android 2.2 devices and forward. I used the Actionbar compat Android library to allow the older devices to have an actionbar. I also used a SQLite database for my data. And just to add one last thing, I also incorporated the use of custom fonts. If you are interesting in looking at this sample application, I have uploaded it to my GitHub account here. I also have a Power Point presentation which you can get here.

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• Can't access my partitions

  - by VanceAnce

  I have asked this question some time before as well - but here is the main problem out: MBR was defect, I used Boot-Repair that I could access my Win-xp partition With windows ext3 readers I can't access Under live-cds i can't access to my Ubuntu partition (not able to mount them) I didn't format them accidentialy or earsed them nor overwrote them. Just a Ubuntu update was running last day and a win. update Can't boot in Ubuntu after windows upgrade and here: http://vanceance.blogspot.co.at/2012/11/testdisk-on-my-pc.html as it seems if an post is on site 3 and had been answered with wathever if it helped or not - i "refresh" it with this more exactly post options i cant use: -format the entire hdd or one of the partitions thx if you have new infos for me

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• How to give parallax backgrounds more depth

  - by user28015

  I have 3 tiled images of some sort of galaxy/space in the background of a 2D Game: The first one has an alpha of 100%, the second an alpha of 80% and the last one has an alpha of 60%. I scroll the the one in the background slower than the other ones of course. classic parallax. In the foreground I have some particles flying towards the player to simulate some dust / stars flying by. (I know that stars don't fly by, but I think we all have seen this in a lot of games). But I can't quite achieve the depth effect I am looking for. I want it to look "deeper". I did read something about using blending modes for the backgrounds, but that would require to render them as objects right? So the question is: What is a good technique to do a scrolling parallax background in GameMaker?

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• An honor to be among the SQL Server MVPs

  - by dbaduck

  I just found out last night that I was officially awarded SQL MVP.  I am honored to be among those that I respect and admire.  I don’t contribute for the recognition and as a former MVP Lead I know the caliber of those that contribute to the SQL Server community, and even those that are not MVP, I am grateful for those of you who have helped me get where I am in SQL Server land. I just wanted to say thanks to the SQL Community for the support and also to Microsoft for this award. Here’s...(read more)

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• Caching preventing users seeing site updates

  - by Timmeh

  I'm experiencing a caching issue I can't explain. This is happening across browsers, IPs and ISPs. If a user force-refreshes, they see the new content. If they then refresh or return to the page, the old one displays. I've tried using headers via PHP such as header( 'Expires: Sat, 26 Jul 1997 05:00:00 GMT' ); header( 'Last-Modified: ' . gmdate( 'D, d M Y H:i:s' ) . ' GMT' ); header( 'Cache-Control: no-store, no-cache, must-revalidate' ); header( 'Cache-Control: post-check=0, pre-check=0', false ); header( 'Pragma: no-cache' ); Laid out correctly, at the very beginning of the file. The problem persists. A pan-ISP proxy is unlikely. Suggestions?

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• Elantech trackpad being identified as a logitech wheel mouse

  - by user11895

  I recently purchased a Samsung RF510 laptop computer, which I absolutely love. However, upon installing Ubuntu 10.10 onto it I couldn't get the trackpad to function properly. It worked as a basic mouse (point and click) but had no functionality for edge scrolling or any of the multitouch settings the trackpad is capable of. After doing a lot of research I discovered the reason is a known issue where the Ubuntu kernel will improperly detect an Elantech trackpad as a logitech PS/2 wheel mouse, and as such will gain none of the functionality that seems to be coded for synaptics trackpads. The question I have is: does anyone know a way to get this working properly? This is my first time trying to run Ubuntu on a laptop (actually, it's my first laptop in the last 12 years) and I'm finding the experience to be intolerable without the basic scrolling/zooming/etc I've been used to using for as long as I can remember.

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• Failed GRUB after 10.04 to 12.04 upgrade in system with LVM

  - by Vagelis L

  I am using Ubuntu Server as a SMB server at work and two days ago I have tried to upgrade it to 12.04. After reboot, I got this grub_xput missing grub rescue> and all attempts to start from this prompt failed (missing components, although grub directory is normally set as prefix). My system sits and boots on an LVM (soft raid-5). I have read almost all posts in many forums, tried grub rescue, boot-repair, ubuntu-secure-remix with boot-repair but without positive result. This is the log of my last (and best so far) attempt to fix this system. Any suggestions? Please help.

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• Hybrid Columnar Compression

  - by user12620172

  You heard me in the past talk about the HCC feature for Oracle databases. Hybrid Columnar Compression is a fantastic, built-in, free feature of Oracle 11Gr2. One used to need an Exadata to make use of it. However, last October, Oracle opened it up and now allows it to work on ANY Oracle DB server running 11Gr2, as long as the storage behind it is a ZFSSA for DNFS, or an Axiom for FC. If you're not sure why this is so cool or what HCC can do for your Oracle database, please check out this presentation. In it, Art will explain HCC, show you what it does, and give you a great idea why it's such a game-changer for those holding lots of historical DB data. Did I mention it's free? Click here: http://hcc.zanghosting.com/hcc-demo-swf.html

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• Showing "Failed" for a SharePoint 2010 Timer Job Status

  - by Damon

  I have been working with a bunch of custom timer jobs for last month.  Basically, I'm processing a bunch of SharePoint items from the timer job and since I don't want the job failing because of an error on one item, so I'm handing errors on an item-by-item basis and just continuing on with the next item.  The net result of this, I soon found, is that my timer job actually says it ran successfully even if every single item fails.  So I figured I would just set the "Failed" status on the timer job is anything went wrong so an administrator could see that not all was well. However, I quickly found that there is no way to set a timer job status.  If you want the status to show up as "Failed" then the only way to do it is to throw an exception.  In my case, I just used a flag to store whether or not an error had occurred, and if so the the timer job throws a an exception just before existing to let the status display correctly.

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• How to handle jumping up a slope in a runner game?

  - by you786

  In an 2D endless runner, what should happen when the player is running "too fast" up a slope and jumps? For example, in a "normal" case: .O. . __..O_____ . / . / O/ _/ If he is moving to the right slowly enough, he will jump upwards and land on the flat part of the surface. However, if he is moving too fast, the jump will have no effect as his forward motion will bring him back in contact with the slope before he can get high enough to pass over it. When the speed is sufficiently high, there will effectively be no jump. _________ / .O/ O/ _/ Are there any known ways to solve this issue? I know it's physically correct*, but are there techniques that other games use to overcome this in a reasonable manner? As a last resort I'll have to just remove all slopes that are too slanted. *If you constrain the player to never jumping backwards.

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• How can I make Google show unit conversions by default?

  - by bUbUKid

  When I search for "4 inches in g" on my Windows Firefox I immediately get a unit conversion done by Google that shows up before the actual search results. On my Ubuntu 12.04 system this does not work though. I tried Firefox and Chromium and have no script blockers installed. I also switched off AdBlock Plus for testing but to no avail. I realize that this is not really Ubuntu doing something wrong but: Are there any settings I can modify to make Google show these results? I use them quite frequently and I believe (though I cannot test it anymore) that this used to work on my last Ubuntu System. Maybe there are some script sources that Ubuntu has disabled by default or something like that?

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• Upload image file: is compression on client side already possible?

  - by Chris

  When offering photo file uploading, usually the user will have badly compressed and huge (10+ megapixels) JPEG files from their cameras or phones. On the server side, these files will get re-compressed to something like 800x600px and JPEG quality 7 or 8. Is it (already) possible to do that re-compression on the client side? So that I would only need to transmit some 100kB (800x600px) and not 3 MB or more. Something like: (1) With javascript's new FileSystem API ( http://slides.html5rocks.com/#filewriter ) it would be possible to read the photo file's data into client side JS. (2) Then it would be necessary to re-encode the JPEG data, which is possible, but I counld not find any library for that (yet). Anybody knows such a library? (3) Last step would be to POST the re-compressed JPEG data to the server side for storage and get a URL to the stored photo file back from the server for inclusion into the client's HTML. I am looking for some jQuery plugin, other JS library or example web page that does this.

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• Security &amp; Dev Opinions needed for 2013 Global Information Security Workforce study and have a chance to win an Ipad!

  - by SoftwareSecurity

  You have the opportunity to help guide the security profession world wide with your opinions and experiences by taking part in the 2013 edition of (ISC)2 Global Information Security Workforce Study and have the chance to win an Ipad!  This study will provide an understanding about upcoming trends, technologies, and visions that as technology professional you will be able to provide invaluable understanding.  The study is being conducted by Frost & Sullivan.  You can participate in the study by clicking here.  Read the last study that was conducted in 2011 and provided tremendous insight into upcoming Trends.  Software developers are encouraged to respond!

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• C# XNA render an entire frame to a texture2d

  - by redcodefinal

  I asked a question here: C# XNA Make rendered screen a texture2d But, I ended up not getting the exact result I was looking for since I didn't ask the question right. In a game I am writing, I render an extremely large city out of objects, this can cause lag when moving the camera to view things that are off screen. I need a way to render then ENTIRE city, even the stuff that is off screen, and make it into a Texture2D. The answer I chose for the last one didn't work entirely right because it only gets what is on screen, not what is off.

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• reminder - HFM Webcast tomorrow

  - by THE

  This is the last reminder: Tomorrow we will have the Advisor Webcast about new features in HFM. Do not miss this one. Greg and Tanya have put together a nice set of Demonstrations of the new features, so this one will be low on the powerpoint footprint and more about - "look what this new thing does". You can find more details in this  post or visit the "Advisor Webcast Current Schedule" on  MOS.

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• Jazoon, JAX California, and Brazilian week - it's conference season again

  - by alexismp

  Sparky is on the road again with GlassFish presence around the world in multiple conferences. This past week Jazoon in Zurich had Java EE, GlassFish, JAX-RS, Servlet, JSF all covered while JAX in California also had a good number of Java EE-related talks (see this Java EE 7 article). FISL, the largest Open Source conference in Brazil (7500 participants last year) is coming up this week with OpenJDK, GlassFish, JavaFX, NetBeans, Java EE 7, and of course JDK 7 all covered by subject matter experts. Expect most of these talks and possibly demos to show up here on TheAquarium, on slideshare or on our YouTube channel.

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• SQL SERVER Get Latest SQL Query for Sessions DMV

  In recent SQL Training I was asked, how can one figure out what was the last SQL Statement executed in sessions. The query for this is very simple. It uses two DMVs and created following quick script for the same. SELECT session_id, TEXT FROM sys.dm_exec_connections CROSS APPLYsys.dm_exec_sql_text(most_recent_sql_handle) AS ST While working with DMVs if you [...]...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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• Design Patterns for SSIS Performance (Presentation)

  Here are the slides from my session (Design patterns for SSIS Performance) presented at SQLBits VI in London last Friday. Slides - Design Patterns for SSIS Performance - Darren Green.pptx (86KB) It was an interesting session, with some very kind feedback, especially considering I woke up on Friday without a voice. The remnants of a near fatal case on man flu rather than any overindulgence the night before I assure you. With much coughing, I tried to turn the off the radio mike during the worst, and an interesting vocal range, we got through it and it seemed to be well received. Thanks to all those who attended.

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