Green Hackathon

I attended Green Campus, Green Hackathon in Otaniemi at 24 and 25 of May. I have to admit, it was quite of an experience. Lots of pizza, coffee and coding. First, we were struggled to come up with any concrete idea to implement. In the end,.
Saturday, June 21, 2014
Posted by Ridvan Döngelci

My XKCD Inspired Business Card Design

I really appreciate xkcd and this is my xkcd inspired business card design. Any comments and feedback is appreciated. FRONT FACE BACK FACE HERE is the link for the Photoshop files: http://goo.gl/FyusMp Reference: http://xkc.
Tuesday, April 15, 2014
Posted by Ridvan Döngelci

Apache Hadoop in VirtualBox

Apache Hadoop is framework for processing large amount of data in parallel fashion. Hadoop framework heavily relies onto map and reduce functions of functional programming languages. A user only defines the map and reduce functions, all other operations.
Friday, October 11, 2013
Posted by Ridvan Döngelci

Virtual Box Port Forwarding For Hadoop

1. Go to main screen in Virtual Box 2. Select virtual machine to forward ports and click Settings 3. Select Network from left panel in popup settings window. 4. Click Advance to see more options 5. Click Port Forwarding 6. Click green plus to add.
Tuesday, October 1, 2013
Posted by Ridvan Döngelci

Bussit

Light weight Helsinki metropolitan area transportation widget. Some Screenshots comments and bug reports are welcomed as well as feature suggestions. https://play.google.com/store/apps/details?id=com.bussitpro Bussit is also available for Tampere https://play.google.com/store/apps/details?id=com.bussittampere F.A.Q How.
Thursday, June 13, 2013
Posted by Ridvan Döngelci

Mobile Website Debugging

Manually debugging a mobile webpage is a lot of effort. You need to run an emulator and it is usually slow and debugging tools are not existing. Opera has a solution for this problem: Opera Mobile Emulator. It is quite fast to run and you may test on.
Saturday, April 27, 2013
Posted by Ridvan Döngelci

Linearization of Multiplication

So multiplication is generally not linearizable. However you can linearize binary multiplication. Let's assume x and y is two binary variables (either 0 or 1), we can linearize z = x*y as follow: z <= x;  z <= y; z >= x+y-1; z >= 0;   Further more you can use this trick to multiply two variables x and y with value {-1,1}. Here is the trick is noticing if x and y is equal then multiplication z is 1 otherwise it is -1. Thus we can map variable x to {0,1}.
Friday, April 26, 2013
Posted by Ridvan Döngelci

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