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December 31, 9999

What's New

  • My current major research area is 3D printing. A position paper on this R&D was recently published. Several other papers are also being published.
Keywords: 3D printing, Fused deposition modeling (FDM), Direction-specified 3D printing, Helical/spiral printing method

December 1, 9999

Miscellaneous

How to walk around this blog

stair-room.jpg fullmoon-table1.jpg I recommend you to select pages from the right-side categories in this page. Try some categories interesting for you. Each category page has an explanation and information for navigation. If you want to see whole blog, you can click the "ARCHIVES" title or look at the per-month archives.

KA-1b.jpg BTW, as shown on the blog top page, the submission date of this page is intentionally set 9999-12-01 00:00:00. However, the actual submission date is 2009-01-18 13:48:24 12:05.

To keep the page light, I exclude photos in individual pages from the archive page. Instead, I inserted some of them here.

Keywords: 3D printing, Computer vision, Deep learning, Network virtualization, Axis-specified search, Emergent computation

August 13, 2015

DIY and Craftsmanship:3D printing & CAD

I do not understand the reason why Printrbot is so popular ever

I attended the SFF Symposium of this year and found that there were several presentations that focused on Printrbot, a 3D printer make. Printrbot was the first 3D printer that I built up from a kit. I found several design defects that causes my much labor. When I see what they have done since then, they seem to be mindless of users convenience. However, Printrbot seems to be still popular among much increased types of 3D printers. I do not understand the reason why so.

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March 27, 2015

Web and Internet:Protocols and Networks

Demo of IPON, a new protocol, in GENI Engineering Conference

I made a business trip to Washington DC for a demo in 22nd GENI Engineering Conference (GEC 22). I explained a newly developed protocol called IPON.

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December 14, 2014

Art, Event and Entertainment:Music

An experience of violin concerto in YouTube video -- difficult in live concerts

I happened to look at a page in YouTube, and wrote a comment. The video is on Tchaikovsky's Violin Concerto played by Sayaka Shoji.

This video shows the facial expressions of the violinist very well. She shows both her emotion and technical issues. She seems to synchronize her performance with the orchestra by looking at the conductor (and probably by communicating with him). It is difficult to see such expressions in concerts.

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December 6, 2013

DIY and Craftsmanship:3D printing & CAD , Information, Computation and Programming:Artificial intelligence, Complex_systems, and Artificial life

Randomly or regularly stacked filaments in "cellular automata like" 3D printing

By using a 3D printer in unusual way, interesting randomized "CA-like" patterns are generated (see this video). When the grids are relatively sparse, filament sometimes stacks regularly and sometimes stacks randomly.

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DIY and Craftsmanship:3D printing & CAD , Information, Computation and Programming:Artificial intelligence, Complex_systems, and Artificial life

Dense and sparse fluctuated "cellular automata like" patterns generated by unusual 3D printing

By using a 3D printer in unusual way, interesting randomized "CA-like" patterns are generated (see this video). Sparse and more fluctuated patterns are generated when extruded less filament, and dense and more regular patterns are generated when extruded more filament.

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DIY and Craftsmanship:3D printing & CAD

Videos on natural-direction 3D printing of Olympic symbols were submitted to YouTube

The printing process of an Olympic symbol using "natural-direction 3D printing" was taken by camcorder, and the resulting videos were submitted to YouTube. Because it takes about 34 minutes to print it, two versions were submitted: 1x digest video and 8 x whole video.

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Keywords:
DIY and Craftsmanship:3D printing & CAD , Information, Computation and Programming:Artificial intelligence, Complex_systems, and Artificial life

3D printing video on naturally fluctuated patterns submitted to YouTube

A video on "Randomized shape creation with fluctuating 3D printing process" was submitted to YouTube. The title is "Creating naturally-fluctuated patterns using a 3D printer".

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December 3, 2012

Miscellaneous

Crosses of Printrbot

I assembled a 3D printer called “Printrbot Plus”. Lazer-cutted wooden parts are in plywoods. The plywoods contains many crosses.

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August 14, 2010

Web and Internet:Protocols and Networks

A false statement that Ethernet is a data-link-layer protocol ! — Overhead caused by doubled network-layer protocols

Ethernet has been said to be a data-link layer protocol. It is true that Ethernet has data-link layer functions. However, it also has network-layer function, i.e., addressing. Therefore, if a network-layer protocol such as the internet protocol (IP) is used over Ethernet, the network-layer function is doubled. This causes protocol complexities, so I think this is a problem to be solved.

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Keywords: ARP, Address Resolution Protocol, ARP elimination, ARP removal

February 19, 2010

Miscellaneous

US Patent Electronic Library insists unusable TIFF

Sometimes I have to look at US patends. In such oppotunities, I usually look at the Web site of the US Patent Office first. However, when I look at patent descriptions, I need a TIFF viewer. Every time I want to do so, I fail to look at them! Why do they use unusable TIFF?!

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December 14, 2009

Information, Computation and Programming:Search, Extraction, and Organization

New “axis-specified” search service for Wikipedia started!

I started a new trial “axis-specified” search service for Japanese version of Wikipedia yesterday. This service was announced in Japanese blog pages such as “Wikipedia 「軸づけ」 検索のインターネット上でのサービスをめざして”.

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January 25, 2009

Politics, Law, and Constitution

Let there be light to Africa!

Father of President Obama was an African. Obama is not only Amarican African, but he is tightly connected to Africa, especially to Kenんa. The United States, of course, has been pay attention to African affairs. However, the presidents of the US seemed less attention to Africa than other areas in the world. So, I want to say "let there be light to Africa"!.

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December 29, 2008

Information, Computation and Programming:Database and Stream processing

SQL queries translated into Perl

Relational databases are widely used. However, it is not very clear how queries written by SQL are executed by the DBMS. Don't you think we can understand the execution mechanism better by simulating the query execution using a procedural language?

I tried to translate some SQL queries into Perl programs. Although there are many methods to implement a join operation, I tried only one. However, I could implement an optimized join within 20 lines of Perl code, and I recognized the power of Perl again.

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June 9, 2008

Information, Computation and Programming:Programming and Compilers

Programming linguistics ― Morphology since then

[ 対応する日本語のページ ]

I wrote that I received an inquiry from a French on “Programming Linguistics” that I proposed in my graduate thesis in a blog article titled “Linguistics of programming languages ― now an inquiry on my graduate thesis came from France”. Yesteday I received another inquiry from a Japanese, and I searched for related work. As I wrote in the above article, there have been a few studies on programs regarded as human-written linguistic expressions. However, in this time, I found a paper by Masaru Ohba and Katsuhiko Gondow, which analyzes the strudture of identifiers.

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Keywords: Double articulation, Programming linguistics, Semiotics, Semiology
Information, Computation and Programming:Programming and Compilers

Linguistics of programming languages ― now an inquiry on my graduate thesis came from France

[対応する日本語の項目]

In 1981, I chose “linguistics of programming languages” or “programming linuistics” for the theme of my graduate thesis. This was a trial to analyze programming languages by using the methodology of linguistics (of natural languages). I wrote a brief introduction to this work on a Web page in English. A scientist looked at this page and wanted to introduce this work in a tutorial in a workshop. So I wrote another Web page that contain an English abstract and contents. Because I wanted to introduce this paper since I started this blog, I try to write on this topic here. [The Japanese version of this page was written in September 2007, but I translated it to English in June 2008.]

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Keywords: Double articulation, Programming linguistics, Semiotics, Semiology

December 30, 2007

Research methodology to Way of life , Thought, Philosophy, and Religion

Hob -- a fusion of job and hobby

As I wrote in a blog entry titled "Unifying hobby (play) and job" (sorry but currently available only in Japanese), the border between hobby (play) and job is not clear for me. This means, I do not know well how I should call it.

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September 24, 2007

Art, Event and Entertainment:Music , Art, Event and Entertainment:Videos, Movies, and Television

Shönberg's Cencerto by Mitsuko Uchida

The Schönberg Center in Austria uploaded fragments of Arnold Schönberg's piano concerto performed by Mitsuko Uchida and a mixture of her talk and performance of the concerto to YouTube. I did not know Uchida had played Schönberg's concerto, but now I know there is a CD (Universal, UCCP1016). The talk is in English and I have not yet understood whole, but I could know how Uchida grasped Schönberg's music, and I was very interested.

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Keywords: Arnold Schoenberg
Art, Event and Entertainment:Music , Art, Event and Entertainment:Videos, Movies, and Television

Free video of "A Survivor from Warsaw" from the Schoenberg Center

The Schönberg Center in Austria uploaded tens of performance videos of Arnold Schönberg's music and documentary videos to YouTube. Most of the music performances are fragments, but some short pieces are completely included in the videos. "A Survivor from Warsaw" conducted by Holst Stein and "talked" by Herman Prei (by sprech-gesang) is a valuable video to be listened. Not only the performance but also the recording and the images are good.

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Keywords: Arnold Shoenberg
1013-06-240.jpg

Objects printed by using the new direction-specified design and printing technology are sold in Dasyn Yahoo! Japan shop.

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