Story of Everything on the Top of a Wooden Plane.

A highly appreciated man and his painting. A man who has the curiosity for the "Story of Everything".
The desire of creating something that has piece of everything! This philosophy would have been inspired only by such a mind; full of passion, endless interests and love.

Some people compares him with some greatest example of the fields such as Michelangelo .... by blaming him to not to give the most successful example of the field. However, to me, thats not the way to understand his outcomes, correctly. His desires were very different compare to other scientists or artists. He is one of the few genius who chose to work out macro scale works and interests. He had been working with  several scientific and artistic field. In other words, his passion was not to serve for the fraction of stuff that is only visible to eye such as creating best anatomic approximation of human body as a sculpture. Or creating best architectural device or creating first flying object and so on. H liked the compositions where every outcome contributes to other. So, there is no use of associating his work with some examples of "best well known".  In his notes, I read that he was unhappy with the fact that people were suffering with the reason that he is not able to show his geniusity by outcomes, products that he created. Most of the time half. He wrote that he would want to have more time... to give people what they want. But, I think he decided to do what he wanted to do. :)
I do not care if he is best or not. He is "My King of Composition". I really appreciate the great scientists and artists who go beyond what is visible or measurable as well as others who choses to work micro scale.[Thats my definition :) ] These people are the philosopher, mathematician, artist, anatomist, botanist, musician, architect at the same time. This fact is what makes outcomes[products] more interesting. Because they have the piece of everything. From engineering point of view, only the solution makes sense and matters. Too much creativity takes time and bothers people. So, I believe thats the reason he called himself as a 'Italian Speaker' instead of calling as an engineer or painter or whatever.

This documentary is nice to watch. It talks about whether the Mona Lisa Painting is unique or not. It was stolen from museum once. There is another painting that is similar to Mona Lisa but a younger one which is locked in Switzerland now. The main properties of the painting and some processes on it.

Spark Installation to Mac

Last week, during my complex networks winter school, I installed the spark to my Mac. It is a very easy process but there is an error that I want to share.

Firstly, to introduce Spark, it is an engine for large scale data processing. Big data is an example for that. You can code in R, SQL, Python, Scala or Java. Our reason to install Spark was to check GraphX. GraphX is an embedded graph processing framework that is built on the top of Apache Spark.
The main property of GraphX is that data tables and graphs can be used interchangeably. In other words, at any time point, a table can be threaten as a vertex of the graph.
There is two collection which is vertex and edge collection. Mapping and reduce operations are done and made of stages. The drawback is the memory. It has a history preserving method to ignore recomputation of previously done computations.



Ok. So for the installation,
Download the source from Spark.
Ensure Java Home is set.
 
 To set



Then  build it with by executing make_distribution.sh 
During build operation I came up with this error.

There are some proposed solutions in StackOverflow.

http://stackoverflow.com/questions/35022961/how-do-i-use-mvn-dependencyget-to-use-https-repo1-maven-org

https://coderwall.com/p/zr6bga/stopping-maven-from-trying-to-access-its-central-repository

http://maven.apache.org/ref/3.0.4/maven-model-builder/super-pom.html

Each suggests to modify pom.xml with different repository url from repo.maven to repo1.maven. But my referenced repository was already repo1.maven  

So, I changed repo1 url to https://repo.maven.apache.org/maven2

. Then my professor suggested me to build it with a reliable internet connection and Voila! It works. So, since the build operation takes quite a long time, you can take into account that the connection can cause problem. 

After getting build success message ,

Ensure  localhost  keyword is exist in the conf/slaves  file.

Lastly start your cluster by executing . / start-all.sh  which is located under /sbin folder.

The system will start the master and worker.

The web interface must be available at http://localhost:8080

Then the second issue to me, during execution, because previously I set an SSH rsa_id. System requested me to type the password. 

SSH keys provide a secure way of logging into a server compare to password login itself.

For that, you can what you can do is ;

You can follow the instructions in this website,

How to set up SSH key

Author included the rationale of the commands nicely. I like it.

    

    

Good Luck :)

Pythagoras Cup (Greedy Cup) filled with Mercury

Yeah, even though sometimes i complain about the mathematical formulas and their inventors while I struggle with some  proofs, they are 'reeeally' very useful. This is a cup which is invented by Pythagoras. The basic principle is related to philosophy of live. 'The time, you become greedy to get more and more; you loose everything you have! ' Nice, right. It is more inspiring to me that as a genius he not only worked for mathematics but also thought of fairness and made it touchable! I like this cup. I want to buy one. :)
  
Afterall, this video proves that nowadays everything can be hacked! See how he does ;)

Müzeyyen Senar - Ben Gamlı Hazan

Pencil Drawing

Before , i heard that drawing hand is the most difficult part of the  body. I agree that so far. But this time I spent more time on the hat. Then the paper destroyed and I gave up. I think I need some tutorials to learn some drawing techniques and lighting. While googling, I realized that Coursera have a bunch of every topic other than drawing. There is one beginners course in Udemy around 12 euros. Firstly I will go for Giovanni Civardi's books. If it does not work, some professional support is worth to take to construct strong basic, either online or offline course. After knowing basics, I believe personal inspiration and practise would be the key asset to go on. Here , there is one of the book about portraits. He has a bunch of book where he talks about shading, hand drawing, portraits and figures. Portrait-Giovanni / Udemy / A Youtube Channel

Duman - Rüyanda Görsen İnanma

Drone Racing !

Drone racing becomes popular so far. It is not gonna take much time to see Drone Racing becomes sub profession of motor racing.  Here I want to share some interesting videos.  Pretty amazing!

First Drone Dog Fight     High Speed     Winter Time     Las Vegas 

Duman - Yürek

Build Your Own Drone - Part 1 (what's going around)

As a part of my personal interest I have decided to built a Drone. Before deciding, I have done a lot of review in the domain of existing UAV (Unmanned Aerial Vehicles).

If you are a newbie like me, the first thing that I can suggest to you is to join the following group  My First Drone Beginners Group . It helps to feel that you are not alone. There are a lot of helpful people who can help you at the struggling moment. 

First thing that I want to do was building every piece of my drone by myself. Thus, I find it useful to buy a Raspberry Pi2 and 3D print the each printable piece. Existing drones were expensive to me, especially a programmable versions. But if you have a lot of money and do not know where to spend, you can go for a fully programmable  DJI Matrice-100 with 3.500 euros cost , or a DJI Phantom 3 between 600 to 1300 euros cost. 

My choice is neither of them. I am going to build a DJI F550 like Hexacopter(6 motors). I want a bigger version and decided tonight. If you are interested in Quadcopters(4 motors), DJI F450 style is fine all well.

So I searched for some 3D print methods and sample projects the create my own frame. Just to let you know there are quite a lot online 3D frame print projects where you can inspire from. Following website seemed interesting to me Thingiverse. I like this frame 3Dhubs. But that time, I was thinking of building a quadcopter. But now I will go for an Hexacopter. 

As a remark for 3D printing, there are certain things that you should be careful about. 

1 )The material (there are types of plastics - strong,flexible...so on)

2 )The size of the piece that you would like to print wrt printer. 

3) Total price. (Existing place charge money wrt time it takes to print material*bigger size counts for bigger time+material cost+guidance*optional)

I did research about 3d print , found a printer as well. The cost consists of material cost, printer usage and if necessary guidance. There was a printer available in my university in use which is cheaper. FABLABs look as good option if you are neither from university nor from institution.

Still 3D print is something in my Drone List. But a secondary goal. I am a student. Thus, I find buying a frame cheaper than 3d printing it. For online shopping Hobbyking and Amazon are good options. At least , I used those ones and satisfied with delivery. I bought a Raspberry Pi2 from Amazon and a Naza M-Lite Flight Controller from Hobbyking. I only had problem with transportation during my order from Hobbyking. I prefered to pay 15 euros for transportation with UPS. But it was a total mess. They destroyed my cargo. In addition to this , UPS bill was included a 30 euro extra tax cost for a 70 euros product.

As a lesson learning you can write it down as ; cheap transportation (airmail - post) does not take the attention of tax chargers. For the small sized cargos , they wont check the cost of product to charge huge tax.

To sum up 3D print part, i suggest to buy a cheap kit or frame online, in the case you have budget constraint. 

While I was searching every detail, I figured out that there are 3 level of detail in which a drone owner can be in. 

The first one is to do every single detail buy yourself. Buying an Arduino or Raspberry and writing all the code by yourself from scratch. As I read estimated time for that is around 1 year  if you don't take it too seriously. Raspberry Pi has an operating system in which you can start to code. Some people suggest this detailed way of working for a painful but robust learning.

Some other people prefer less level of detail and buy a ready-to-fly drone. They suggest to buy a mini drone with 50-80 euros and primarily learn how to fly and how to crash with radio controller.

My choice is mid level detail. I decided to buy a flight controller first. This is to create an autonomous drone. It will have GPS module to provide the capability  of  location calculation to come back. My preference is to buy each pieces wrt my budget.There is an option to buy a kit which includes each an every necessary pieces to construct the drone.

 After ensuring a robust fly, learning some acrobatic movements :) I am going to enhance capabilities and put more intelligence. A camera and some sensors to process environmental information , some machine learning for a better fly then it is cooked :)

If I could achieve all those steps in 6 months, I may approach to write my own flight controller on Raspberry Pi. Before that I want to concentrate on creating an AI Drone. Let's see.

************---------------------*************-----------------------*********** 

I collected some suggestions with respect to flight controllers.

There are 3 model that I am gonna show.

3DR Pixhawk  Pixhawk is very suitable for a robust start. But the cost is around 250 euros just for flight controller. 

DJI Naza  My current preference is DJI-Naza M-Lite, because it is compatible with my budget and a professional one where you can upgrade to M2 and V2 Versions later on . 

HK Pilot This is a cheap flight controller that is available in Hobbyking, 

I will be sharing other pieces in detail once I complete to buy. Most probably I will write another post as Part 2 to include must-known informations.

E ne oldu simdi :) Guzel parca..

Kaan TANGÖZE - Bekle Dedi Gitti

My New Inspiration - The Kepler Conjecture

The Kepler conjecture is the study of sphere arrangements. This is a special arrangement where maximum fill in is the case.  What takes my attention is the study performed on the six-cornered snowflake. Because water molecules chemically bound into hexagonal network, corners create hexagon shape. This is the most simplest hydrogen bounded crystal. And what makes it special is that this shape conserves infinite number of unique becoming. Wouw.. 
In addition to this , honeycombs has the hexagonal lattice form in which maximum product is conserved robustly.
I am gonna search more about applications. There is a robust application field that I observed and it is a secret for now :)

PEOPLE ARE AWESOME (Martial Arts Edition)

Super cool ! Love it !