The First Cry of Atom Today is the first day of the rest of my life.

Deleting unused files in Chef cookbook

When you use Chef cookbook, a lot of files might be installed in you machine, configuration, script and so on. Chef provides very useful resource for putting a file called template. You can put any type of text file with this resource. Template Resource But template does not manage a file when it is unused. How can we delete a file once instal... Read more

Optimization for neural network

The other day I read this article. This post was written about the variation of gradient descent algorithm. Gradient descent is an de facto standard algorithm for optimizing deep learning. Iterative optimization algorithm such as gradient descent plays an important role in deep learning because there is no way to find the global solution analyti... Read more

Spark in Production

Finally the book I wrote at the first time in my life has been published today. It is the first chance to write a published book written on paper. I’m amazed at the fact that I can complete to write a book in English though I’m not an native English speaker. Of course it is not totally owe to myself. I cannot say thank you enough to editors and ... Read more

Data for our future

If I remember correctly, I wrote such a post several years ago. I wanted to say that it is not important to keep just grief for our future. I believe only data can contribute improvement our life in future, emotion can be a support for keeping that action though. The belief is not changed yet today. Today, 5 years has passed from the disaster... Read more

Markdown Common Elements

Summary: You can pick as item to see how to apply in markdown. Comum Elements Basic formatting Headings Lists Paragraph Modifiers Urls Horizontal Rule Images Code Basic formatting This note demonstrates some of what Markdown is capable of doing. And that’s how to do it. This note **demonstrates** some of what [Markdown]... Read more