Recurrent Convolutional Neural Networks for Text Classification

I made a simple implementation of text classification with Recurrent CNN.

https://github.com/knok/rcnn-text-classification

It uses chainer, a Deep Learning framework.

Recurrent convolutional neural networks for text classification
Siwei Lai, Liheng Xu, Kang Liu, Jun Zhao, Chinese Academy of Sciences, China
AAAI. 2015.

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GAME-ON – the historical videogame exhibition

I attended  “GAME-ON” last weedkend at Miraikan, The National Museum of Emerging Science and Innovation in Tokyo.

There are many historical videogame hardware and software, and the bland-new PSVR exibition.

DEC PDP-1 DisplayI can see the real DEC PDP-1 hardware. Unfortunately it is only haredware, not worked. And also PONG is exibited.

SPACEWAR description

SPACEWAR description

There are many old hardware Atari 2600, Commodore 64, Spectrum, and so on.

Apple IIe Atari 2600/VCS Commodore 64 Spectrum

Almost exhibition with English description, and officials can talk English,  if you feel interested, go Miraikan until 30th May.

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PIXELS (film)

I watched “PIXELS” in a theater. It subjects about video games,  mostly retro 80’s arcade games.

I love video games from childhood, my first game played would be Taito’s Space Invaders, I was the 4 or 5 yeas old time. It had bring me to the computer world.

Fortunately I am working at Akihabara area, so I can play the video games in the movie like Pac-man, Glaga, Cemtipede,  Donkey Kong and so on in two gamecenters, “Natsuge Museum” and “Hey (Hirose Entertainment Yard”.

Natsuge Museum is under private management so it closes week days. They focused to old games between 70’th to 90’th.

Hey is a franchised shop ownd by TAITO. They covered almost video games except medal games. You can play old games like Paper-boy, The Tower of Druaga, and newest games like Left4Dead arcade.

They correct many titles of the games in the movie, and be playable. They are my recommended place in Akihaba, if you like video games.

 

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1Gbps FTTH

This month, I changed FTTH Internet from 100Mbps to 1Gbps. The costs is almost same as the past line.

To change the line, I had need to be witness in the construction, so I  couldn’t get time to attend DebConf 2015.

According to Speedtest.net, I can get about 300 Mbps upstream bandwidth.

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Jessie installer with kvm/serial console

I tried to install Jessie on a brand-new virtual machine (kvm), but it has a problem about serial console login.

At least, wheezy installer worked fine because it adds getty entry on /etc/inittab. Jessie uses systemd but no care about getty service for serial console. The probrem is reported as #769406.

My solution is invoke “systemctl enable serial-getty@ttyS0.service” via ssh.

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Travatar, an OpenSource statistical machine translation system

Graham Neubig published “Travater“, an OpenSource statistical machine translation system and the demosite (http://ahclab.naist.jp/travatar/translator/).

Graham said “It makes good result likely Google Translation.” Unfortunately, it seems to be crwoded, so I can’t get correct result (output “IO Error” dialog).

Anyway, it is a good new for Japanese processing scene.

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Weak ssh public keys in github

A presentation slide, named “Attacking against 5 millions SSH public keys – 偶然にも500万個のSSH公開鍵を手に入れた俺たちは” is published, it is a lightning talk in “Edomae security seminar” in Jan 24, 2015.

 He grabbed ssh public keys with  GitHub API (https://github.com/${user}.key), the API is obsoleted, but not closed.

He found short (<= 512 bit) DSA/RSA keys and can solve prime decomposition 256bit RSA key in 3 seconds.

And he repoted there are 208 weak ssh keys generated by Debian/Ubuntu (CVE-2008-0166). It was already announced  by GitHub.

On the other hand, such ssh keys couldn’t solve prime decomposition with fastgcd. It means almost ssh keys in GitHub has no bias in almost random number generators implementations, it is a good news.

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Use Module::Build::Tiny as Debian policy compliant

I tried to make Google::API::Client deb package, it requires Module::Build::Tiny, and dh-make-perl don’t suppot it, so I worte a override code in debian/rules.

[sourcecode]
override_dh_auto_install:
./Build install –destdir=$$(pwd)/debian/$pkgname –installdirs=vendor
[/sourcecode]

More elegant answer should be to add Module::Build::Lite support to dh-make-perl.

Update:

This probrem is only wheezy, I don’t need such workaround on sid. Thank you greoga.

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New year 2015

In Japan, winter holiday is a special for many people, they go back to their hometown, and take a time with family.

Of cause, I do too. Last weekend I went back to Nagoya and now I still in there. Tomorrow I’ll go to Tokyo and work after this weekend.

Many asian countries have same practice, but almost celebrate the lunar(Asian) New Year. Some countrysides in Japan people also celebrate the luna New Year, but not major in Japan.

I can take a good holiday, and I hope this year is good for everyone.

 

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120th Tokyo area debian seminar

I had attend 120th Tokyo area Debian seminar at Shinjuku.

An attendee brought hp Jornada 780 and tried to install Debian, so I helped him.

Using a kernel, boot loader and userland from “Lenny on j720” page and it worked fine, except PCMCIA NIC.

His NIC is Corga PCC-TD is not listed in /etc/pcmcia/*. I didn’t have enough time to write it, so I couldn’t check it.

However, later releases after Lenny don’t have “arm” architecuture, so it should be hard to upgrade it. I don’t know recent Linux kernel work on Jornada 780. The configuration and code for jonrnada 780 are still in the kernel, but it wouldn’t be tested anyone.

 

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