Some maintenance and service logs of computers used in our Lab.

    Apple II was indeed a dream machine and was far beyond the reach of the 17 years old high school kid. By luck I could get this machine 10 years later and used as a simple wordprocessor, until I bought my first "modern" personal computer, the NEC PC-9801NS20.
    In 2021, the long stowed Apple II Plus was sulvaged from the deep bottom of the lab's storage room, but it stopped running shortly after powered up.
    Till today, this has been a seventeen's dream machine - I still do not understand how it actually works. There are hundreds of things I couldn't understand at that time, something I wanted to try on, and things I should have learned from this computer. So - let my venture resume - which I had to give up nearly 40 years ago.

    Private compilation albums featuring mostly jazz arrangements, with jackets illustlated by Pogo.

    Pogo's accidental discovery might lead the world of mathematics into another height. Or might not.

    It was a week in which fuel was impossible to obtain, entire city was in a complete darkness, and so many people out there were freezing.
    We must do something. Anything trivial wouldn't be laughed at. To protect family, to help people and to save our lives.

    It's just an average user's note enjoying Toshiba X01T Windows Mobile 6 based smart phone. This latest digital device was expected to replace my mobile phone, Linux-based Sharp Zaurus PDA and Sanyo IC voice recorder altogether. It was simply found, that dedicated equipments provide the most.
    All text in the page is written with Word Mobile on X01T.

    Some self study notes for radio receiver design.

    As an early microcomputer user I still dream to build a machine by myself alone, but I would not be able to find time to do so and perhaps no longer practical. One day I read an news article about a newly developed small, inexpensive yet very promising microcomputer board called Raspberry Pi , I pre-ordered mine immediately on that night although there was no particular purpose on it, simply I thought it would be fun to play with.

"Raspberry Pi" is a trademark of the Raspberry Pi Foundation.

    Observation log of an astigmatic astronomer who still cannot tell which is Deneb or Vega.

    We have never expected that sewing would be among our research activities.

Jan. 2006 -updating

    Building a vacuum tube shortwave receiver is universal fun and preasure for radio amateurs. Thinking to build one more time a 0-V-2 which I build when I was 11 years old, I realized that the word "0-V-2" never appears in American radio articles. Where the nomenclature "0-V-1" or "0-V-2" came from? Who originated it in which country? Could it be in U.K. or Germany, or Italy? If the letter "V" means "Valve", it would be in Britain - "R" would be used if it was from Germany.... This was how this small study had begun. Still I don't get my conclusion. If you have an old article using a term "0-V-1" or "0-V-2", I'd be very happy to know the title of the article associated with the year it was published.