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Articles indexed Friday June 13 2014

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• I tried to transplant the wireless_tools to Android4.0 system, but I have a problem with Java

  - by Chen Guoli

  My Linux system is Ubuntu Kylin, a new branch of Ubuntu spreading mainly in China. I have changed some files, such as wireless.22.h, ifrename.c and iwlib.h, in wireless_tools.29/ which is located in Android4.0 root directory. Then I followed these steps: $ cd ~/Android4.0 $ su $[key](change to root) root# source build/envsetup.sh root# cd ~/Android4.0/wireless_tools.2.9/ root# mm Then I got a message telling me that: Your version is: java version "1.7.0_21". The correct version is: Java SE 1.6. Then I did as How can I uninstall my current java and install sun java 1.6 The java was installed successfully, but when i tried mm again: Your version is: java version "1.6.0_27". The correct version is: Java SE 1.6. Then I tried https://source.android.com/source/initializing.html , but it didn't work. How can I install "java SE 1.6." correctly?

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• Unable install cmake and ccmake?

  - by user159618

  So the thing is I'm trying to install Cmake and cmake-curses-gui. I have updated the system with apt-get-update. sudo apt-get install cmake Reading package lists... Done Building dependency tree Reading state information... Done Package cmake is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'cmake' has no installation candidate sudo apt-get install cmake-curses-gui Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package cmake-curses-gui That's strange. Can anyone give some pointers? Pastbin sources.list :- http://pastebin.com/DufycYfZ

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• How can I build the best Cyber Cafe possible using Ubuntu (Desktop or the Server Edition)?

  - by Osman Hassan

  My question has to do with my plan/dream of opening a Cyber Cafe in Mogadishu, Somalia, my birth place. I plan to use 5 to 15 computers (all laptops) running Ubuntu. Now that you have the background to my question, I need your help, advice and expertise. What type of computer (laptop) should I use for this project? What type of operating system (Ubuntu Desktop/Ubuntu Server Edition) should I use? How can I setup a file and printer sharing server? What program should I use to manage the client computers? If you have done this before and can point me to the best and easiest way to build this Cyber Cafe, I would appreciate it tremendously. Also, if you can point me to any books, articles, or blogs which I should read, I would appreciate it too.

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• CPU fan kicks in to full gear when i try to install ubuntu 12.10 or LTS

  - by Remi cook

  Whenever I try to install (DUAL BOOT WITH WINDOWS 7) both versions of Ubuntu desktop on my PC the CPU fan starts spinning so fast that I couldn't even go through the installation for fear of my CPU exploding. In windows 7, the temp reaches 25-30 idle and 30-45 under full load. I tried installing through Wubi and by burning it to USB drive. Both wield the same results. I would appreciate any help. I'm a complete noob so take it easy one me. Intel Core i5 2500 @ 3.30GHz 4.00 GB Dual-Channel DDR3 @ 668MHz (9-9-9-24) Motherboard ASUSTeK Computer INC. P8Z68-V LX (LGA1155) Graphics AMD Radeon HD 6850 (Sapphire/PCPartner)

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• Similar domains using my business' content, and stealing SEO results

  - by Murciano

  I've been hired to create a website for a restaurant in my city, let's call it "Flying Dragon" Chinese restaurant. The restaurant has never had a website, though the business itself is about ten years old. However, if you Google the restaurant's name, the first site that comes up seems to be affiliated with the restaurant itself, even though it is not. This site - let's say, flyingdragonchinese.com - is also the one that Google has apparently selected, in its results, to be the official website of the restaurant - in essence, the first Google result is flyingdragonchinese.com, and directly beneath it, within the same entry, are the Google reviews and contact information. Upon visiting flyingdragonchinese.com (again, not the actual name), I see that the website has taken the menu content from the restaurant, in the same manner that Yelp does, but it also seems (to the untrained eye) to be the restaurant's official site. Basically, someone has created a fake website for the business (I am not sure why) using its actual menu and contact information, and is hogging the search results. The concept is similar to a "scraping site" except that the information seems to have been stolen manually. The main problem is that visitors to this site will have an inaccurate impression of the restaurant. I feel like the obvious solution is to register a new domain for my site, and simply beat out this competitor (or whatever it is) with smarter SEO and business verification with Google. However, the Conan-the-Barbarian-web-designer part of me wants to somehow bash this other site (deservedly?) into oblivion. But I don't know what I can really do, besides maybe issuing a cease-and-desist letter, or trying to contact the web host for the site, although there is no contact information available on this "fake" site for the site owner. Has anyone ever experienced something like this? Is there any solution?

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• htaccess/cPanel 301 redirects not working for add-on domain

  - by Clemens

  I've already looked at many samples and tutorials how to set up those 301 redirects on Apache and can't figure out why only the second one is working: Options +FollowSymlinks RewriteEngine on #doesn't work: RewriteCond %{HTTP_HOST} ^old.com$ [OR] RewriteCond %{HTTP_HOST} ^www.old.com$ RewriteRule ^page-still-exists.htm$ "http://www.new.com/new-target-page.htm" [R=301,L] #works: RewriteCond %{HTTP_HOST} ^old.com$ [OR] RewriteCond %{HTTP_HOST} ^www.old.com$ RewriteRule ^page-does-no-longer-exist.htm$ "http://www.new.com/" [R=301,L] #works: RewriteCond %{HTTP_HOST} ^old.com$ [OR] RewriteCond %{HTTP_HOST} ^www.old.com$ RewriteRule ^folder/otherpage.htm$ "http://www.new.com/" [R=301,L] #works: RewriteCond %{HTTP_HOST} ^old.com$ [OR] RewriteCond %{HTTP_HOST} ^www.old.com$ RewriteRule ^/?$ "http://www.new.com/" [R=301,L] #doesn't work: RewriteCond %{HTTP_HOST} ^old.com$ [OR] RewriteCond %{HTTP_HOST} ^www.old.com$ RewriteRule ^somepage.htm$ "http://www.old.com/some-page.htm" [R=301,L] I have no idea why only the second one is working. The only difference I can see is, that in the second case the old page does no longer exist on the old domain. But whenever I want to redirect any still existing page from the old domain to the new domain the page on the old domain is still used. Any input is much appreciated because this is slowly driving me crazy :) EDIT: I added the complete htaccess file. EDIT 2: So I removed almost all redirects and currently my htaccess looks like this: Options +FollowSymlinks RewriteEngine on RewriteCond %{HTTP_HOST} ^old\.com$ [OR] RewriteCond %{HTTP_HOST} ^www\.old\.com$ RewriteRule ^(.*)$ "http\:\/\/www\.new\.com\/$1" [R=301,L] The only redirect that is working is the simple one from old.com to new.com. A redirect like old.com/page.htm to new.com or even new.com/page.htm is not working. And actually I really don't know where this redirect is actually coming from... Can a 301 really be so complicated?

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• Google Webmaster Tools shows invalid data

  - by Altar

  Webmaster Tools shows 1 URL error (not found page). The report says that 5 pages are linking to a page (let's call it x) that does not exist (and because it doesn't exists it returns a soft 404). HOWEVER, I look in those 5 pages (in the source code) and none is linking to the x page. It is like Google sees an old page that was indeed pointing to x. What is the problem? How do I know if Google cached an old version for those 5 pages?

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• What bots are really worth letting onto a site?

  - by blunders

  Having written a number of bots, and seen the massive amounts of random bots that happen to crawl a site, I am wondering if the goal of the site allowing bots is for the potential for the bot to send real traffic back to the site if there is any reason to allow bots that are not known to be sending real traffic back, and how to spot these "good" bots; based on how they ID themselves, IPs they come from, behaviors, etc.

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• Do AdWords conversions only track AdWords visitors?

  - by atticae

  I have set up an AdWords conversion and put the conversion tracking JS code on a test page. However, I don't see any conversions tracked when I visit it. Does the AdWords conversion tracking only register your conversion if you come to the site by clicking on an AdWords campaign? Google's help page advises me to test the code by clicking a campaign. However, I would like to use the tracking to track all conversions, not just AdWords. I considered using Analytics as well, but it seems you can only track via url there, not JS, which would mean I had to restructure a part of my page. (Because currently a conversion appears does not necessarily happen on a different URL.) Is AdWords tracking not a viable solution to track all visitor conversions on my site?

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• Using Google Analytics tracking URLs in Facebook ads

  - by Ted

  I generated the following Google Analytics tracking URL to use in a Facebook ad: https://www.somewebsite.org/?utm_source=facebook&utm_medium=cpc&utm_term=schools&utm_content=newsfeed&utm_campaign=facebookad3 I know the ad is being clicked (Facebook ad manager data) but the referred traffic is not appearing in my site's Google Analytics data. I think it's because Facebook is doing some weird redirect URL modifying. Any ideas?

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• Subdomain still times out after being set up a month ago

  - by user8137

  I would like to use the subdomain www.high-res.domain.com to be accessed by external customers with specific permissions to access the site (like FTP). We use Network Solutions to house domain.com. We recently added a new IP address to point to www.high-res.domain.com. I gave the IP address to the company that hosts our website. I pinged www.high-res.domain.com and it points to the correct IP address but still times out. It’s been a few weeks now and when you ping it, it still times out. C:\>ping XXX.XXX.X.XXX Pinging XXX.XXX.X.XXX with 32 bytes of data: Request timed out. Request timed out. Request timed out. Request timed out. Ping statistics for XXX.XXX.X.XXX: Packets: Sent = 4, Received = 0, Lost = 4 (100% loss). tracert times out as well. I even went to DNS tools and a few other sites for checking this and it shows the same thing. I recently went into the DNSmgmt on our server (wink2k3sp1) and created an A record under the DomainDnsZones which translated to a CNAME when you look at it. Under the domain it has two entries, one to the subdomain and the other to the website host. Each has separate IP addresses. Is this correct?

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• Which physics phenomenons can be simulated properly with Box2d or bullet physics? [on hold]

  - by user3585425

  Knowing that box2d or bullet physics can't simulate Newton's cradle (because of multiple bodies being in contact at the same time if I understand correctly), is there a sets of physics phenomenons that imply two or more objects that still can be simulated properly ? For example, I'm thinking about lightweight objects launched towards heavyweight objects. If the object is destroyed on contact, this would not make a difference if the energy is not transmitted correctly on impact.

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• I want to learn the basics of Game Development [on hold]

  - by Mary

  I have programming experience and I would like to know how to start building games. I'm interested in building games for desktops and Android tablets. Could you list the general steps of Game Building? From the more common programming languages used to the software and frameworks available at each stage? I'm just trying to get the big picture of all the different options and tools I have at my disposal. Please leave some book recommendations and useful links!

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• How to get location of sprite placed on rotating circle in cocos2d android?

  - by Real_steel4819

  I am developing a game using cocos2d and i got stuck here when finding location of sprite placed on rotating circle on background, so that when i hit at certain position on circle its not getting hit at wanted position,but its going away from it and placing target there.I tried printing the position of hit on spriteMoveFinished() and ccTouchesEnded(). Its giving initial position and not rotated position. CGPoint location = CCDirector.sharedDirector().convertToGL(CGPoint.ccp(event.getX(), event.getY())); This is what i am using to get location.

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• Generating Normal map from a Image with a given Albedo map

  - by snape

  I am working on a research problem part of which involves generating normal map from a given image of a rusted object. I searched the internet for techniques to achieve the above and apparently crazybump is mentioned a lot. I tried it but it didn't produce the desirable effects. Also I am looking for a method which draws inspiration from an existing research paper not some closed source software. I turned my attention to the technique described in the this paper. Results from this technique are satisfactory for normal objects because of bias in the training data but it doesn't work very well in the case of rusted objects. After this I focussed my attention on generating Albedo map (the above problem would become more solvable if Albedo map is obtained). Fortunately I am able to generate pretty good albedo maps for images of rusted objects. I used this paper's approach to generate Albedo maps. Now I want to know a good technique to get Normal map given an image and it's corresponding Albedo map. To give you an idea of what kind of images I am working with I am attaching a sample. Links to research material would be really appreciated. Thanks!

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• Create dynamic buffer SharpDX

  - by fedab

  I want to set a buffer that is updated every frame but can't figure it out, what i have to do. The only working thing i have is this: mdexcription = new BufferDescription(Matrix.SizeInBytes * Matrices.Length, ResourceUsage.Dynamic, BindFlags.VertexBuffer, CpuAccessFlags.Write, ResourceOptionFlags.None, 0); instanceBuffer = SharpDX.Direct3D11.Buffer.Create(Device, Matrices, mdexcription); vBB = new VertexBufferBinding(instanceBuffer, Matrix.SizeInBytes, 0); DeviceContext.InputAssembler.SetVertexBuffers(1, vBB); Draw: //Change Matrices (Matrix[]) every frame... instanceBuffer.Dispose(); instanceBuffer = SharpDX.Direct3D11.Buffer.Create(Device, Matrices, mdexcription); vBB = new VertexBufferBinding(instanceBuffer, Matrix.SizeInBytes, 0); DeviceContext.InputAssembler.SetVertexBuffers(1, vBB); I guess Dispose() and creating a new buffer is slow and can be done much faster. I've read about DataStream but i do not know, how to set this up properly. What steps do i have to do to set up a DataStream to achieve fast every-frame update?

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• What to send to server in real time FPS game?

  - by syloc

  What is the right way to tell the position of our local player to the server? Some documents say that it is better to send the inputs whenever they are produced. And some documents say the client sends its position in a fixed interval. With the sending the inputs approach: What should I do if the player is holding down the direction keys? It means I need to send a package to the server in every frame. Isn't it too much? And there is also the rotation of the player from the mouse input. Here is an example: http://www.gabrielgambetta.com/fpm_live.html What about sending the position in fixed interval approach. It sends too few messages to the server. But it also reduces responsiveness. So which way is better?

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• Workaround the flip queue (AKA pre-rendered frames) in OpenGL?

  - by user41500

  It appears that some drivers implement a "flip queue" such that, even with vsync enabled, the first few calls to swap buffers return immediately (queuing those frames for later use). It is only after this queue is filled that buffer swaps will block to synchronize with vblank. This behavior is detrimental to my application. It creates latency. Does anyone know of a way to disable it or a workaround for dealing with it? The OpenGL Wiki on Swap Interval suggests a call to glFinish after the swap but I've had no such luck with that trick.

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• Collision detection with multiple polygons simultaneously

  - by Craig Innes

  I've written a collision system which detects/resolves collisions between a rectangular player and a convex polygon world using the Separating Axis Theorem. This scheme works fine when the player is colliding with a single polygon, but when I try to create a level made up of combinations of these shapes, the player gets "stuck" between shapes when trying to move from one polygon to the other. The reason for this seems to be that collisions are detected after the player has been pushed through the shape by its movement or gravity. When the system resolves the collision, it resolves them in an order that doesn't make sense (for example, when the player is moving from one flat rectangle to another, gravity pushes them below the ground, but the collision with the left hand side of the second block is resolved before the collision with the top of the block, meaning the player is pushed back left before being pushed back up). Other similar posts have resolved this problem by having a strict rule on which axes to resolve first. For example, always resolve the collision on the y axis, then if the object is still colliding with things, resolve on the x axis. This solution only works in the case of a completely axis oriented box world, and doesn't solve the problem if the player is stuck moving along a series of angled shapes or sliding down a wall. Does any one have any ideas of how I could alter my collision system to prevent these situations from happening?

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