From today, this blog is mostly written in English.

I has made entries for this blog as log of research. As I start research for new field, I have to write papers in English much more than ever. And more, most of documents I've read recently are written in English.

I have come to the conclution to change languege used in composing this blog. There are two reasons.

1. It is more effective to summarize documents I've read in English than in Japanese.
2. To write this blog in English is good chance to train to build higher skill of English composition.

There will be somo entries written in Japanese like before when I am tired to think to find appropriate expression in english. When you find Japanese text, please do not accuse me. Thank you.