Domain: u-tokyo.ac.jp
Stories and comments across the archive that link to u-tokyo.ac.jp.
Comments · 195
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Re:Screens that Heterodyne Infrared Light
I know the bit you've described regarding the "Retro-reflective Material"(.pdf), but the University of Tokyo page also says it involves this X'tal Vision thing that somehow involves projection only visible on the material. I don't think the site was clear on it, so I don't get how it is involved. Look at the pictures, though.
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Re:Screens that Heterodyne Infrared Light
I know the bit you've described regarding the "Retro-reflective Material"(.pdf), but the University of Tokyo page also says it involves this X'tal Vision thing that somehow involves projection only visible on the material. I don't think the site was clear on it, so I don't get how it is involved. Look at the pictures, though.
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Re:Screens that Heterodyne Infrared Light
I know the bit you've described regarding the "Retro-reflective Material"(.pdf), but the University of Tokyo page also says it involves this X'tal Vision thing that somehow involves projection only visible on the material. I don't think the site was clear on it, so I don't get how it is involved. Look at the pictures, though.
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Re:Screens that Heterodyne Infrared Light
That's probably part of the technology they used, mentioned in a previous story about "Invisible Cloaks, Translucent Walls". Otherwise, I don't see how they would be able to project an image on a material without the projection appearing around it.
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Maybe I'm missing something..
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It's not "camoflage". That's a mistranslationRead the project web site. This has very little to do with "camoflage" in the military sense. This is a visualization technique. The best approach involves the user wearing a head-mounted projector so they can see the projection from the correct angle. In any case, you have to be very near the projection axis for this to work. The target object is painted with the retro-reflective beaded paint used on traffic signs. That stuff has great reflectivity for a very narrow angle, and very little dispersion. So a projector of modest power can make the illusion work from a single point of view. Off-axis, forget it.
"Camoflage" seems to be a mistranslation from the Japanese original. Would someone who reads Japanese well please read the Japanese version of the site and try to clear this up?
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Video link
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Video link
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Holo-bots and hooligans.
Not only are they working on making you invisible, they're also working on your cyborg/holo-bot. The pictures up right now got a right laugh out of me, but personally I can't wait until the day I can assasinate my enemies invisibly from a rooftop with my own Fonzie (from Happy Days) holo-bot. Ayyyy.
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Re:No. not really
You utter imbecile!
Go read the fucking research and complain only after you have accomplished better.
Watch this, read this, plus go at least read the fucking article:
"'This material allows you to see a three-dimensional image,' Professor Tachi said."
And also read this. -
Re:No. not really
You utter imbecile!
Go read the fucking research and complain only after you have accomplished better.
Watch this, read this, plus go at least read the fucking article:
"'This material allows you to see a three-dimensional image,' Professor Tachi said."
And also read this. -
Re:No. not really
You utter imbecile!
Go read the fucking research and complain only after you have accomplished better.
Watch this, read this, plus go at least read the fucking article:
"'This material allows you to see a three-dimensional image,' Professor Tachi said."
And also read this. -
Heh, check this out...
Picture
Whoa!! Where's the person on the picture? I can't see him! it's truly magic! ;-) -
Stealing ideas from Firesign Theater.Between Optical Camoflage and his other magnum opus, Telexistence, he will soon answer the musical question:
"How Can You Be In Two Places At Once When You're Really Nowhere At All?"
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HoaxSo it's clear to everyone that this is a hoax, right? It's physically impossible. The videos show moving objects against an unmoving background, and the effect is clearly achieved through bluescreening.
Otherwise, how would a block in front of you show the static background behind you.
Or more ludicrously, how would a block in front of you show your skeleton? Especially when the skeleton doesn't move with your motions?
Please, we've had bluescreen technology for decades. And we've even upgraded to greenscreen.
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Re:Two vids of it in action...
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Re:Two vids of it in action...
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someone's already done it
I searched around a bit, and found that someone's already done it. It uses the PCRE library along with a camlp4 macro that provides an elegant "match ____ with" construct tailored specifically to regexps. I'm impressed.
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Execute user processes in kernel mode on linux
sorry for replying to myself i just stumbled on this patch for the linux kernel that could allow the same performance/reliabiliry compromise to linux and i think this could be interesting..
Kernel Mode Linux : Execute user processes in kernel mode
i'll give it a try at home ;) -
Re:Article with Pictures...
After googling a bit I found the website of the guy developing it: http://projects.star.t.u-tokyo.ac.jp/projects/MED
I A/xv/oc.html
When you read how it's done, its really not that impressive at all - essentially just videoing the area behind him, and then using a video projector to shine it on to him. -
Email analysis might be a better toolBlogs or plogs are all well and good, but the problem is that getting anyone to write any kind of documentation is hard. There will always be design decisions that get made but never recorded. Personally, I think that the method of extracting design rationales from an analysis of a project email archive that was proposed in this paper would be more useful than a plog, in that it captures the actual consensus and decision-making process, rather than relying on people to go out of their way to write extra information down after the fact. Admittedly, it misses decisions made in verbal interchanges, but it does catch a lot of stuff that would otherwise be missed (I know that many of the projects I've worked on recently have resolved many design issues via email exchanges).
As an aside: who is Roland Piquepaille, and how does he manage to get an article in
/. every other day? -
Yea - but the researchers referenced GITS(!)
I also thought this sounded waaay cool, so I quick-searched for Tachi Labs that is doing the research. Good links on that page to further info, images, videos. And such a cool reference 'section' (bottom of that page):
"M. Shiro, Ghost in the Shell, Kodansya, 1991" (link added by me)
With earlier /. reports on the Nausicaa jet, the Akira bike, and now this Cloaking thing (ok, so it's not really matching Kusanagi & crew's wicked cloaking tech in GITS, but still...) ...I don't know what to make of it, but I think it's pretty cool that they get inspiration for their R&D from somewhat 'unlikely' places - and really follow through on those quirky ideas.
Gotta respect that kind of curiosity and dedication. -
Optical Camouflage
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not that impressive
Personally, I didn't think this was very impressive. Sure, they can program a robot to look cute while it _slowly_ picks up a ball and throws it, but how about catching it?
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Extra space in URL
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baseball
With high-speed batting robot they can play baseball.
Wake up and see. -
Re:An open-source ITRON system does not exist
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Re:Is it an OS?
I don't know where you got the message, but in its HP, it says "The ITRON Project creates standards for real-time operating systems used in embedded systems and for related specifications.".
So it includes its OS as well as its related specification. -
Re:Makes you wonder...
...if anyone's done any work on running kernel modules with user priviledges,
If you're willing to patch Linux, the line between user & kernel space can be easily blurred.
With FUSD, a program can appear to be a kernel module, although it's running in user-space, for more safety and ease of development.
With KML, a user program can be run in kernel space, for more performance and risk of catastrophy. -
Re:Let calculate Pi!
206 billion isn't enough? I like that graph at the bottom. 10^14 digits by 2010!
(these people actually did the calculation, but don't have much to look at on their site) -
Some actual specs on the Univ of Tokyo system
The statment "Mac OS X replacing Linux at Tokyo University" is misleading on so many levels, I won't even begin. The discussion has further degenerated around inaccurate speculation. Let's touch briefly on reality:
The University-wide system is described here.
The new system, which includes the Macs and is provided by NEC, is described here.
These are "located in the Information Education Buildings, the Information Technology Center, and the main library" (ref) to be used "for general computer literacy education and programing education".
16% of the terminals will be Windows-based for lectures using Windows or CAD applications. What they replace are a mix of Windows NT and X window terminals (they write "X-terminal", but presumably these are actually linux boxes, not really X terminals).
What this decidedly has nothing to do with is the systems used by scientists, scholars, administrators, and clerical staff at the University of Tokyo. Nor what might be used in other teaching settings. So, the idea that Univ of Tokyo once used Linux monolithiocally is as wrong as to think Linux was replaced by OS X monolithically. -Eric -
Some actual specs on the Univ of Tokyo system
The statment "Mac OS X replacing Linux at Tokyo University" is misleading on so many levels, I won't even begin. The discussion has further degenerated around inaccurate speculation. Let's touch briefly on reality:
The University-wide system is described here.
The new system, which includes the Macs and is provided by NEC, is described here.
These are "located in the Information Education Buildings, the Information Technology Center, and the main library" (ref) to be used "for general computer literacy education and programing education".
16% of the terminals will be Windows-based for lectures using Windows or CAD applications. What they replace are a mix of Windows NT and X window terminals (they write "X-terminal", but presumably these are actually linux boxes, not really X terminals).
What this decidedly has nothing to do with is the systems used by scientists, scholars, administrators, and clerical staff at the University of Tokyo. Nor what might be used in other teaching settings. So, the idea that Univ of Tokyo once used Linux monolithiocally is as wrong as to think Linux was replaced by OS X monolithically. -Eric -
Some actual specs on the Univ of Tokyo system
The statment "Mac OS X replacing Linux at Tokyo University" is misleading on so many levels, I won't even begin. The discussion has further degenerated around inaccurate speculation. Let's touch briefly on reality:
The University-wide system is described here.
The new system, which includes the Macs and is provided by NEC, is described here.
These are "located in the Information Education Buildings, the Information Technology Center, and the main library" (ref) to be used "for general computer literacy education and programing education".
16% of the terminals will be Windows-based for lectures using Windows or CAD applications. What they replace are a mix of Windows NT and X window terminals (they write "X-terminal", but presumably these are actually linux boxes, not really X terminals).
What this decidedly has nothing to do with is the systems used by scientists, scholars, administrators, and clerical staff at the University of Tokyo. Nor what might be used in other teaching settings. So, the idea that Univ of Tokyo once used Linux monolithiocally is as wrong as to think Linux was replaced by OS X monolithically. -Eric -
micro kernel via the type system could be possible
Are you somehow recommending a kernel be written in something else than C???
This could perhaps be neccessary. Current micro kernel architectures isolate their parts using different adress spaces. The implementation is similar to unix processes and so quite easy, but commnuication is very expensive.
Java/.NET/etc. isolate "processes" (e.g. applets) via the type system. This idea could be brought to kernel space. When Java loads a class file, first the bytecode is checked. After that, the JIT-Compiler generates the corresponding machine code. This code is run directly by the processor. Although a Java programm is translated into machine code, it cannot break out of the VM, because it is checked by the verifyer in the first place.
There already exists a kind of verifyer for the Linux kernel, it's called kernel mode linux. Baesd on this technology a micro kernel like architecture would be possible, where all the servers are runnig in the same adress space and so can communicate very cheap (sending a message is just a procedure call in the same adress space). Security will be enforced completely by a sound type system. And this is the point, where a object oriented language would be neccessary.
The main problem for performance would be the code checker. But using the TPM chip, it could be possible to check the code once during installation, compile it to machine code and then digitally seal it. So open source and TCPA could finally profit from each other. -
Kamioka, and huge toys
Wow, the amount of time I wasted just by following that link...
I saw this picture with a nice landscape. Decided to investigate and after a bit of Googling it turns out it's from somewhere in Kamioka, Japan. That's where physicists from around the world built this huge toy which they call Super-Kamiokande.
Some pretty impressive pictures, especially when you see that they built many of these to make this, just to fill it with water (warning huge pic, here's a smaller one), and conduct experiments into neutrinos, dark matter, and other cool stuff like that... Wow.
There you go, just learnt a few things, and added Kamioka to my list of places to visit ;) -
Kamioka, and huge toys
Wow, the amount of time I wasted just by following that link...
I saw this picture with a nice landscape. Decided to investigate and after a bit of Googling it turns out it's from somewhere in Kamioka, Japan. That's where physicists from around the world built this huge toy which they call Super-Kamiokande.
Some pretty impressive pictures, especially when you see that they built many of these to make this, just to fill it with water (warning huge pic, here's a smaller one), and conduct experiments into neutrinos, dark matter, and other cool stuff like that... Wow.
There you go, just learnt a few things, and added Kamioka to my list of places to visit ;) -
Kamioka, and huge toys
Wow, the amount of time I wasted just by following that link...
I saw this picture with a nice landscape. Decided to investigate and after a bit of Googling it turns out it's from somewhere in Kamioka, Japan. That's where physicists from around the world built this huge toy which they call Super-Kamiokande.
Some pretty impressive pictures, especially when you see that they built many of these to make this, just to fill it with water (warning huge pic, here's a smaller one), and conduct experiments into neutrinos, dark matter, and other cool stuff like that... Wow.
There you go, just learnt a few things, and added Kamioka to my list of places to visit ;) -
Kamioka, and huge toys
Wow, the amount of time I wasted just by following that link...
I saw this picture with a nice landscape. Decided to investigate and after a bit of Googling it turns out it's from somewhere in Kamioka, Japan. That's where physicists from around the world built this huge toy which they call Super-Kamiokande.
Some pretty impressive pictures, especially when you see that they built many of these to make this, just to fill it with water (warning huge pic, here's a smaller one), and conduct experiments into neutrinos, dark matter, and other cool stuff like that... Wow.
There you go, just learnt a few things, and added Kamioka to my list of places to visit ;) -
Re:Linux does not make computers faster
Of course, Linux happens to be one of those OSes that can be made to near-enough disappear when the application is loaded - it's fairly easy to make linux load the entire application into kernel-space with the appropriate patches. There's a spectrum of solutions with different tradeoffs - the most common is to simply deliberately write your application as a kernel module, but you can also choose to run user processes in the kernel memory space.
Seeing as the application never subsequently context-switches, but can still use anything in the kernel it finds useful, the only wastage you have is memory taken up by any unused code-paths in the kernel that can't be rmmodded out, without the hassle of writing your own hardware-drivers. It's a nice approach for certain tasks. -
Re:Home page
OK, but there is more interesting info at:
TRON Project Information
and
TRON Web
also in english :)
bb4now,
PMC -
Re:God, that is awful.
Putting more applications into kernel mode is a step along the transitional path to a microkernel architecture. If things like that get popular, then Linux will evolve means to guard them from the rest of the kernel, fairly allocate resources between them, etc.
(One path development might take is to do less checking during each context switch, and more earlier on, when the application was first loaded. If a degree of trust can be statically verified, the app can be safely permitted to run with full kernel privs. This gets into HP of course.)
To play with the concept, here's a toolkit which allows any program to be added to the kernel. -
Re:Is it real?The videos here look much more 'real' and not so pre-planned.
The 1ms page also has some good video, although I might still question the square / circle demo, as it might just as well keep the circle out of the field of view of the camera. Anyway, this page explains that they are achieving 1ms response time by integrating simple image processing with the photodetection circuitry to elimate having to wait for an entire frame from the CCD.
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Re:Is it real?The videos here look much more 'real' and not so pre-planned.
The 1ms page also has some good video, although I might still question the square / circle demo, as it might just as well keep the circle out of the field of view of the camera. Anyway, this page explains that they are achieving 1ms response time by integrating simple image processing with the photodetection circuitry to elimate having to wait for an entire frame from the CCD.
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The Interesting Demo Movies
The Movies: Optical Camouflage
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Re:Language?
Ah, now if only you had used Basque, or try an endangered language, then your clever ploy would have worked.
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For invisibility, use this technology instead
Check out "Optical Camouflage Technology" at this link. I heard there were some recent improvements made to it to get rid of the green tint. Here is another link.
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there's always kernel mode linux
there's always kernel mode linux if you like to live on the edge!
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Who cares!
Who cares about LCD monitors! I want an invisible coat!
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Re:i don't know what's happening
For those of you too lazy to search Google for "Japanese invisibility cloak", here is the link that started it and the project home page (with movies).
The objects are NOT truly transparent. They just appear that way due to optical tricks. Basically, they project what is behind an object to what is on the front of it using cameras, projectors, and mirrors. It's a neat idea, and he suggests some useful applications, but nothing like most were expecting upon seeing the pictures. Still, makes for some kick-ass videos.
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Interesting Language Links...
The Summer Institute in Linguistics has a much more comprehensive list of languages in their compendium entitled the Ethnologue (Available for perusing online.
UNESCO, an agency of the United Nations has compiled The Redbook of Endangered Languages listing many endangered languages around the world.
Another source for those interested in endangered languages is The Foundation For Endangered Languages.
For those more interested in creating languages of their own, or "conlangs" like Tolkien created, might I suggest Langmaker, Mark Rosenfelder's excellent Virtual Verduria (including his Language Construction Kit), and for those interested in Tolkiens' tongues (such as Quenya, almost unanimously considered the most beautiful conlang created) there is the very informational Ardalambion.
Hope those links will help people interested in the topics of endangered and model languages.