Why you cry when slicing the onion? Is tears from it really good for your eyes? And how to slice onion without crying? All these questions can be answered if you know how the onion makes you cry when you are slicing them. Read the article: [Mengiris Bawang Tanpa Menangis](http://febdian.net/drupal/node/36) in Bahasa Indonesia.  Read More →

According to Relativistic Theory, space and time adjust themself to make speed of light (c) constant. Space can contract and time can dilate, these make c invariant in any circumstance. I have written a brief story about this. Now, there is one interesting question: how does it happen? (I’m not asking why, but how :-)). Well, there is a particular answer that I got from book of The Elegant Universe”. I think Brian really get into Einstein’s mind how Einstein thought about it first time. Feynman used the same method in his famous *The Feynman... 

There are a lot techniques to explain the famous Rutherford scattering, classical point-of-view, semi-classical, plane wave in quantum mechanics, and many more. Among them, the most elegant elegant to explain this phenomenom is,  Read More →

Scientific behavior is really a good thing. It is an integrity of honestness and objectiveness. For example, we’d like to throw an argumentative opinion to a public, we like a logical statement, and if we ask because we don’t understand. The other thing that good from scientist is when they are arguing or debating, they are finding a truth, not a winning. These are really good value indeed from scientist. These behaviors are developed and applied in daily life by some of us, especially they who learn (or learned) mathematics and physics. And sometime...