Domain: uci.edu
Stories and comments across the archive that link to uci.edu.
Comments · 387
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Re:Simple solution...
Here is a start for NetBIOS from here:
2K/XP:
Right-click on Local Area Network
Select: Properties
Select: Internet Protocol TCP/IP
Click on Properties
Click on Advanced
Select the WINS tab
Select Disable NetBIOS over TCP/IP
Click OK
Lower:
Right-click on My Network Places
Select: Properties
Select: Internet Protocol TCP/IP
Click on Properties
Select the NetBIOS tab
Uncheck: Enable NetBIOS over TCP/IP
Click OK
Removing the binding from TCP/IP is the same, up to 'Click on Properties':
Select the Bindings tab
Check: Client for Microsoft Networks
Check: File and Printer Sharing
Click OK
Warning about using NetBEUI: it slows down large networks by only using multicast (i.e. turns your switch into a regular hub). Read about it here. (By the way, that link has screenshots of the directions above.) -
Good Grief, how about something informative?Squatter? Thanks for the opinion, how about some information to back it up? Like who is Leon Stambler? That's not a nice description. This patent he has looks like he 0wnz public key encryption, the way Amazon does one click shopping. Following the other patent numbers here. If I were an ecryption dude I could interpret those patents, but I'm not and don't really know the history.
Looks more like evidence that the Patent office is owned by money and does not serve individual inventors. How are this man's patents any different from any other BS work protected by that office? Are they even valid? Most importantly, what makes you think he did not do anything with those patents or even needed to?
You don't need to do anything other than put a good faith effort. I could have an idea that would take billions of dollars to implement, it's still mine and the patent office would still grant me protection of that idea for being good enough to share it through them. If the only companies in the world with the kinds of resources to work that patent decided to sit for seventeen years the world is just that much worse off.
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Re:Link to patent
The patent was filed on 3 Feb 1999. Depending on how you read the legalese of the claims, use of CVS (for web development) may or may not be covered by this patent.
Prior art with regard to CVS is easy to prove. Back in 1997 cyclic.com already had a CVS and the Web page. That page references amongst others L.D.Stein's book How to set up and maintain a web site, that makes mention of the use of CVS for version control.
By 1998 the same page on cyclic included a link to Sean Dreilinger's CVS Version Control for Web Site Projects (link to current version). archive.org does not appear to have the original document, but the link is on cyclic.com circa Dec 1998, and Sean's Copyright is dated back to 1997.
Cyclic.com also had a page listing sites using CVS (for web development, 1998).
And just in case anyone didn't get the message, WebDAV (RFC) has a history (and more) going back to 1996. The RFC was published in (surprise surprise) Feb 1999.
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Re:Benford doesn't know what he's talking aboutYet another brilliant Anonymous Coward wrote:
Benford apparently isn't aware that centrifuge experiments *have* been conducted on the space shuttle. Or that Columbia was carrying a physiology experiment that would have done a lot for revealing just why exposure to zero-G causes orthostatic intolerance [inability to stand or remain standing].
The radius of the centrifuge obviously matters *a lot* if you're talking about having people live in them for long periods of time. The acceleration gradient of a centrifuge is really weird when you're near the axis: imagine a radical change in "gravity" when you stand-up or sit-down. Imagine "gravity" being stronger at your feet than at your head. The point of using the long tether gimmick is to get a flat acceleration gradient that more closely approximates a planets surface gravity.
Specifically, the 1998 STS-90 mission [Neurolab], among other things, studied how humans perceived centrifugal motion in the absence of an existing 1G gravity vector. This mission was designed to study the vestibular system, but others have looked at cardiovascular effects.
The long and the short is that it helps some, but the inertial problem is still sticky. Worse, it tends to make the astronauts sick. Losing track of your vertical tends to make your body do bad things.Take a look at the "off-axis rotator" they used in these Neurolab experiments. It's really *small*... no wonder if it made them sick: Astronaut Training for The Vestibular Team Experiments
A simple review of Pubmed/Medline would have showed all of this. But then, Benford's strength always was was fiction, wasn't it?
Gregory Benford's technical credentials are somewhat better established than yours, Anonymous: Gregory Benford Professor Plasma Physics and AstrophysicsActually, I've read his work. I don't think fiction's really a strong-point, either.
And, not that it's relevant or anything, but some of his fiction strikes me as being some of the best SF written in the last several decades (I'm a fan of "Across the Sea of Suns" myself). -
Seems pretty dead to me - last release was 1998 ;)
It looks like the last release of the Chimera web browser was 2.0b4 on June 1st 1998.
A few plugins since then, but it looks like it's been dead since 1999. Even its name has been co-opted now.
Does no one remember? I thought it once was the default browser on FreeBSD. -
Re:Drexler
Interesting article, it's not often you list science fiction in the credits of something trying to be scientific. The way I see it, "nanotechnology" will be its own field in a couple decades, much like computer science is today relative to physics and math.
The whole point is that tiny robots which can build anything are a very, very long way off. The only way it's going to happen is through this "hype and effort" that's going into "weak" nanotechnology.
As far as moving atoms around (including bonding, unbonding, exciting states) one at a time to make things... no problem. Dr. Ho can "see" and manipulate the electron clouds surrounding an atom (pretty damn cool if you ask me).
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Re:Dark MatterI'm no astrophysicist here, but this is how I understand it:
There are three types of neutrinos: electron, muon and tau, each having a different characteristic mass and energy spectrum. The experimentally measured flux of solar electron neutrinos based upon the solar nuclear fusion reactions turned out to be too low by ~50% based on the theoretical GUT and QED calculations. As a means of explaining the apparent discrepancy, it had been postulated that neutrinos are capable of "oscillating" between types over distance and time, thereby affecting the number of measured events (the experimental measurement being limited to certain energies). However, theory suggests that in order to oscillate, the neutrino must have mass.
Ingenious experiments now seem to confirm that what was once considered a massless particle does indeed have mass, albeit vanishingly small.
Since neutrinos are produced in stellar fusion reactions and supernova explosions, etc., in very great quantities (the flux here on Earth is estimated to be over 10^10/cm^2/sec), they would be expected to be in a higher density in the vicinity of galaxies, and thereby could account for a large part of the "missing matter" holding galaxies together.
I think this is what the NPR story was referring to
... but maybe not.A couple of links:
Physics Web articleon neutrinos.
Super-Kamiokande at UC Irvine Neutrino page.
UniSci article on oscillation.
The confirmation of Solar Fusion by neutrino detection 2002 Nobel Prize press release. -
Noise PollutionSo the RIAA wants to have the benefit of every single sound we hear in our existance, perhaps they should also be prepare to pay the cost of noise pollution. Someone bring out the lawyer, this organization has much to answer for!
Anytime your neighbor keeps you up with the radio, what do you do, call the police, yes. And the police should charge the RIAA with $200 bucks for it, since its their system, their fault. Same with television. But don't stop there, get a lawyer, and sue them for sleep deprivation, and get workmanship compensation, payment for psychologist visits, etc.
Hear a song you hate, drive you crazy, and can't get what you need done? Do the same damn thing.
Your children listening to music with cussing and violence, and they start it to, it the RIAA's fault! Get yourself a lawyer, these are the people promoting it and making money, why should you be the parent. The RIAA should have been the ones there to make sure kids aren't listening to it, like they monitor everything else.
The point of all this is the golden rule, Do unto others as they do unto you, the RIAA should not have it both ways when they start slithering this low.
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Been there, done thatA complex of dormitories at the University of California at Irvine is called Middle Earth . Included in phase one is (among others) a dorm called "Hobbiton".
Nothing like a sewer pipe though, depending on what you had to drink, it may start to look like one...
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Been there, done thatA complex of dormitories at the University of California at Irvine is called Middle Earth . Included in phase one is (among others) a dorm called "Hobbiton".
Nothing like a sewer pipe though, depending on what you had to drink, it may start to look like one...
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marketing tactics ...
can it be a M$ marketing strategy to force people to upgrade to winXP, I recently read about Univ. of California, Irvine making it compulsory for every user on its residential network to upgrade to XP. Even though some concession was provided, I don't see a reson for migrating since all my applications run well enough and most of the security problems can be taken care by running a firewall. (atleast taken care of as well as in XP)
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UCI Repositories
Someone should mention the UCI Machine Learning Repository and the UCI Knowledge Discovery in Databases Archive.
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UCI Repositories
Someone should mention the UCI Machine Learning Repository and the UCI Knowledge Discovery in Databases Archive.
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Re:College Radio
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baduk, dammitWhy do so many geeks fail to realize that the ultimate geek challenge, go/baduk/weichi, hasn't really been dented by mathematicians, or even computer scientists?
Yes, there's been some productive analysis of the endgame, but that's So Vastly Simpler than the opening or middle game.
More here. .
I understand go is EXPTIME-complete or EXPSPACE-complete depending on the ko rule (which isn't that central to the flow of the game).
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Papers about the problem...
This sounds like Steve Gibson's suggestion from gibson research.
I wrote a paper in a similar vein last spring about stopping ddos attacks, it's the second section of this paper. It seeks to fix the underlying problem, not create a band-aid. -
"classic" games and computabilityAfter reading this page on complexity of games and puzzles, it almost seems like all the games that have stood the test of time have a very NP-complete aspect to it. I guess this is pretty obvious, since it's intuitively easy to observe that easy games get boring after awhile.
I'm curious whether people hundreds of years from now will still be playing Tetris (I would bet that they will be). I've been playing Tetris on the game boy for over 10 years now and it's still fun.
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Its so easy to do !Most courses at most univerisities have online web pages on which faculty frequently post their lecture notes (ppt or pdf slides), their assignments, the syllabus etc.
MIT has done the simple (administratively complex) task of putting all this together and putting it online at one central place.
UC Irvine has a similar effort; all UCI courses *have* to have a website with most of the course material online. I hope they see this MIT effort and take it to the next level of making it completely open and useful for the whole world.
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Its so easy to do !Most courses at most univerisities have online web pages on which faculty frequently post their lecture notes (ppt or pdf slides), their assignments, the syllabus etc.
MIT has done the simple (administratively complex) task of putting all this together and putting it online at one central place.
UC Irvine has a similar effort; all UCI courses *have* to have a website with most of the course material online. I hope they see this MIT effort and take it to the next level of making it completely open and useful for the whole world.
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Re:You have no right to fuck up my connectionEdlau wrote:
For the record, UCI has a local Redhat mirror:
ftp://andromeda.acs.uci.edu/mirrors/linux
UCI is also the home of WebDAV, as its author, Jim Whitehead, was a student there. It's pretty cool that UCI still maintains the WebDAV homepage on a UCI server:
WebDAV home
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UCInet metricsThis site shows exactly how much bandwidth resnet [ie: reshsg] uses [as well as other depts, and other stats]:
UCInet metrics
While I do work at UCI, I'm in a different dept. and don't know much about the workings of resnet. I do feel sorry for the support folks there, though, as most of the hacked windows boxes and klez-infected PCs come from reshsg.uci.edu.
UCI is quite attentive to security issues, as soon NetBIOS blocking at the border router will go into effect. This will keep off campus crackers from trying to break into windows PCs that have windows file sharing turned on.
Now if only commercial ISPs could learn a bit from UCI's policy...
/vjl/ -
Conflicting statements
Notice that the explanation page says p2p bandwidth is throttled because it is "entertainment traffic", but games are given as much bandwidth as necessary if it's available. Games aren't entertainment?
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I goto UCI...and while it says that they allow 5mbs and upwards of 10mbs persecond for P2P software. It is in reality a much lower number. The highest constant speed I could get was about 1.0KB/s. And while they do allow you to use these P2P programs, they do not promote "piracy" If you read their connection policy P07-06
P.07-06 MP3 Music, Movies and other Copyrighted Files It has come to the attention of UCI that many students are copying and illegally distributing copyrighted songs and movies. Please be aware that this activity is a violation of the Federal Copyright laws and you could be arrested and prosecuted in a criminal case or sued in a civil case. The University of California in no way condones or encourages this illegal activity and will take action to terminate Residential Network privileges of any IntIrVine student breaking University regulations, State or Federal laws. For more information and detailed information relating to the Digital Millennium Copyright Act, please visit http://www.loc.gov/copyright/legislation/hr2281.p
The fact that they've been contacted by copyright owners probably "helped" them along in their decision to reduce bandwidth on a P2P networkd f Another excellent resource regarding copyright and "Fair Use" is provided by Stanford University at the following website: http://fairuse.stanford.edu The University of California, Irvine is obliged to cooperate with any criminal investigation regarding these matters. Please be aware that according to copyright law, you do not need to be making a profit to be prosecuted for distributing copyrighted materials such as these Movie and MP3 files. The University of California, Irvine has received complaints from Owners of Copyrighted Movies, Songs and Software, and that students were distributing illegal copies of these. These students were immediately disconnected from the IntIrVine and their cases were sent to the Dean of Students for disciplinary action. If you are offering copies of movies by any means (file sharing, mIRC, etc.) you are in violation of the Federal Copyright Act. If you have copyrighted files on your computer that are not legal copies of music you own, delete them. If you are distributing these files illegally by any means, stop now. -
What is a species?
I'd like to know what the term "isolated" means in this context. Obviously, not geographically, since apparently these elephants can be found in the same habitat as the other two species.
Is it possible that the article meant that species one is found in savannah areas, that species two is found in forest areas, and that species three is found in both savannah and forest ares -- without meaning that their areas overlap?
I myself am skeptical of these findings. There are no details given as to the distinctions in the DNA between the different species. Does anyone know what the cut-off point is for defining a species by DNA?
Can't interbreed isn't it? We discussed elephants and mammoths a couple of months ago. I found that there hobbyists who cross lions with tiger, and various other kinds of cats. And there are others who cross zebras with donkeys, and other horselike animals. Just like mules, the cross between horses and donkeys, the offspring are infertile.
Here is an interesting link to an online book that discusses the reintroduction of extinct species.
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Re:UUID's are not Microsoft-ish hacks
See http://ftp.ics.uci.edu/pub/ietf/webdav/uuid-guid/
d raft-leach-uuids-guids-01.txt
This draft was never moved to a standard by IETF because ISO-11578 already described a method for generating UUID's, Microsoft just didn't know about it, or didn't like it. I haven't seen the ISO, but supposedly it doesn't rely on the MAC address, though I'm quite sure Microsoft's way of generating UUID's does, as their draft describes it. Perhaps someone more knowledgeable can clarify it? -
Dwindling Now
It's kind of eye-opening when you think about how games that seemed so great so long ago can now be fit on something so small as a card.
Yeah, well the entire surviving literary output of Classical Greece -- a civilization of some small repute -- fits on a single cd. With enough space left over to include all the literature of the Byzantine Empire as well! Someday, somebody will say, "Every line of code written during the Dawn Age of Computing is available on a single nanowarp needle! With enough space left over for that 'Library of Congress' thing. Pretty sobering." -
Re:Other Groupware
Actually no they were not; half of my response detailed GroupWise failing points, and the other half detailed "not useful in most production environments". Don't try to twist my words around, or minimize what I have to say...
Either way though, we are pretty much in line with the real world. For most small to medium sized companies (less than 3,000 employees) I've worked with/for, they don't have the desire or the budget to put their employees through a training program for email/groupware. Especially when many employees still have difficulty with simple tasks, such as determining where a document was saved. On-top of that, any professionally setup training program is going to be hard to find, and expensive for a dying product such as GroupWise...
It sounds to me like a lot more than just "...open-source people..." don't understand groupware, I'd be interested in hearing in detail how you think a proprietary, and non-standards compliant groupware package such as GroupWise would help productivity for an average company. An average company being; someplace where actual products are manufactured and sold (not some dot-bomb). Meaning, most employees don't care about email, and don't care to use the calendaring system; they don't want to haul around some "...geeky...", and expensive palm-pilot to sync with the calendar, and they don't want to be tied to their desk either... This also means that they must collaborate/communicate with other systems, and companies as well.
Out here in the real world, most people only want to use their computers to get what they absolutely must get done. Let's take an analogy: How many cars out there do you see running with owner-initiated modifications (ie: things that improve the traction, mileage, or safety). Or how many vehicles do you see out there with dents on the side/front/back of it, where you'd think "it looks like that driver did something stupid", and then that same idiot cuts in front of you, slams on the gas, and whizzes though traffic. In the grand scheme of things, people don't care to make the changes necessary to improve either their driving habits or their vehicle, even though the benefits are clear, all they want to do is use the car to get from point A to point B.
The point is; everything but the basics is overhead, and most people are not going to go out of their way to use or change it... After all, most "...fully integrated..." groupware systems require the the company reshape not only itself around the product, but their systems as well. ERP products are not near as popular anymore, now that most have found that it is a waste of time and money to try to reshape a company around a computer system - in-fact, many companies have failed while trying to reshape their-selves. Customizing groupware does help to some extent, but it still requires the company shape itself around the product.
Some people may find groupware the best thing since sliced bread for the first few months, but as time goes on, and employees come and go, they will find it less and less useful. That is, until yet another expensive training session comes along (expensive both for the actual training, and for the employee's lost productivity), and then the cycle starts all over. The real question is; where is the cost/benefit analysis, and how is a package that provides standards based calendaring and email exchange/mailing lists, any better or worse than a proprietary all-encompassing groupware package?
An excellent paper regarding groupware lies here: http://www.ics.uci.edu/~grudin/Papers/CACM94/cacm9 4.html -
More linksHere is a link.
I found a link to an online book entitled "Biodiversity and Conservation: A Hypertext Book" by Peter J. Bryant. Here is a link to the chapter devoted to captive breeding and reintroduction. About halfway through this very interesting chapter Bryant addresses the woolly mammoth reintroduction.
African elephants and Mammoths are more closely related than either is to the Indian elephant.
A zoo experimented by crossing an Indian and an African elephant. The hybrid calf died. Bryant pointed out that a Elephant-Mammoth hybrid would probably be sterile, like a mule.
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Re:Algebra and Music
If this subject interests you check out the articles at MuSICA website where they did a lot of research on music and the brain.
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Scratch a litter deeper...This article barely scratches the surface of the topic of physical (tangible) user interfaces, which has been quite an interesting field for over a decade. Here are my additions, which are still paltry but should hopefully flesh out the topic more for those interested.
First of all, here are some of the arguments i'm familiar with for physical computing initiatives:
- We live in physical space and can be much more expressive in it
- Computers need to learn how to integrate into human social contexts (which are physical),rather than humans squeezing into computer models of interaction
- Comptuers currently demand direct physical attention through keyboards, mice, and monitors "chaining" us to our desks. Physical interfaces should make computers transparently integrated into our environment; especially important for engineering professions, construction work, etc.
- Physical computing is more adaptable to people with disabilities, since it's goal is to express information with more physical senses.
- The GUI's already been done and I need a research grant
;)
Here's a listing of the most historically famous initiatives, most of them starting in the early 90s or before. Many more exist.
Ubiquitous Computing was one initiative at PARC to put computational devices into everything from pens to badges to entire rooms. They mainly worked with office applications, like digital whiteborads, integrated desks. They also attacked the physcal interface from the perspective of human social contexts, that is, making comptuers part of social interactions. At EuroPARC, a somewhat unrrelated project to create paperless offices ended up creating a prototype desk called The Digital Desk that allowed a projected desktop and physical paper documents to work alongside each other on a white tabletop.
One of the first intentional physical interface projects i know of is the Tangible edia group at MIT, whcih is an extension of Hiroshi Ishii's great work called tangible bits. The main focus of this work was to make the concepts of a desktop physical, using "phicons" which always reminded me of monoply peices that you moved around on a table top. There was a gereat adaptation of this made for modeling the construction of light beams, where you moved physical representations of the different components and physically saw the different patterns of light.
It can be hard to actually describe the core concepts narratively, so some great conceptual designs often best convey the real concepts at play. The best has to be Durrell Bishop's Marble Answering Machine. It was an answering machine that represented each message as an encoded marble in a tray. To play a message you moved the marble into a small plate and the message would play, and putting the marble back would cause the message to be deleted, or you could save it someplace else. Here's a tangible bits paper that discusses this project (don't think there's an actual project page for this design).
For a good summary of all these in much better words than i can provide, try Paul Dourish's fabulous work Where the Action Is: The foundations of Embodied Interaction, in which he lays out his argument not just for new forms of embodied/physical interactions, but also some of the changes to core CS principles that are needed to support it. It's much more profound than The Design of Everyday Things by Donald Norman, though not as easily readable. chimchim -
Scratch a litter deeper...This article barely scratches the surface of the topic of physical (tangible) user interfaces, which has been quite an interesting field for over a decade. Here are my additions, which are still paltry but should hopefully flesh out the topic more for those interested.
First of all, here are some of the arguments i'm familiar with for physical computing initiatives:
- We live in physical space and can be much more expressive in it
- Computers need to learn how to integrate into human social contexts (which are physical),rather than humans squeezing into computer models of interaction
- Comptuers currently demand direct physical attention through keyboards, mice, and monitors "chaining" us to our desks. Physical interfaces should make computers transparently integrated into our environment; especially important for engineering professions, construction work, etc.
- Physical computing is more adaptable to people with disabilities, since it's goal is to express information with more physical senses.
- The GUI's already been done and I need a research grant
;)
Here's a listing of the most historically famous initiatives, most of them starting in the early 90s or before. Many more exist.
Ubiquitous Computing was one initiative at PARC to put computational devices into everything from pens to badges to entire rooms. They mainly worked with office applications, like digital whiteborads, integrated desks. They also attacked the physcal interface from the perspective of human social contexts, that is, making comptuers part of social interactions. At EuroPARC, a somewhat unrrelated project to create paperless offices ended up creating a prototype desk called The Digital Desk that allowed a projected desktop and physical paper documents to work alongside each other on a white tabletop.
One of the first intentional physical interface projects i know of is the Tangible edia group at MIT, whcih is an extension of Hiroshi Ishii's great work called tangible bits. The main focus of this work was to make the concepts of a desktop physical, using "phicons" which always reminded me of monoply peices that you moved around on a table top. There was a gereat adaptation of this made for modeling the construction of light beams, where you moved physical representations of the different components and physically saw the different patterns of light.
It can be hard to actually describe the core concepts narratively, so some great conceptual designs often best convey the real concepts at play. The best has to be Durrell Bishop's Marble Answering Machine. It was an answering machine that represented each message as an encoded marble in a tray. To play a message you moved the marble into a small plate and the message would play, and putting the marble back would cause the message to be deleted, or you could save it someplace else. Here's a tangible bits paper that discusses this project (don't think there's an actual project page for this design).
For a good summary of all these in much better words than i can provide, try Paul Dourish's fabulous work Where the Action Is: The foundations of Embodied Interaction, in which he lays out his argument not just for new forms of embodied/physical interactions, but also some of the changes to core CS principles that are needed to support it. It's much more profound than The Design of Everyday Things by Donald Norman, though not as easily readable. chimchim -
4-D on a 2-D Screen (monitor)
I recently worked on a project (I am not the author) that modeled 4-D environments on the screen. We made a spaceship that had 4-D elements in it where doors would show or hide based on whether or not the correct hyperplane was in view.
There is a demo of the software that runs on windows and the navigation is very easy to figure out. -
4-D on a 2-D Screen (monitor)
I recently worked on a project (I am not the author) that modeled 4-D environments on the screen. We made a spaceship that had 4-D elements in it where doors would show or hide based on whether or not the correct hyperplane was in view.
There is a demo of the software that runs on windows and the navigation is very easy to figure out. -
University of Calif. Professor defends MicrosoftSpeaking of Microsoft, in my alumni magazine, I found an article by a University of California, Irvine Graduate School of Management professor, Dr. McKenzie, defending Microsoft.
Favorite quote: "Microsoft . . . . restricting market share . . . . will probably mean an increase in software prices, as well as a decline in quality and level of service."
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University of Calif. Professor defends MicrosoftSpeaking of Microsoft, in my alumni magazine, I found an article by a University of California, Irvine Graduate School of Management professor, Dr. McKenzie, defending Microsoft.
Favorite quote: "Microsoft . . . . restricting market share . . . . will probably mean an increase in software prices, as well as a decline in quality and level of service."
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University of Calif. Professor defends MicrosoftSpeaking of Microsoft, in my alumni magazine, I found an article by a University of California, Irvine Graduate School of Management professor, Dr. McKenzie, defending Microsoft.
Favorite quote: "Microsoft . . . . restricting market share . . . . will probably mean an increase in software prices, as well as a decline in quality and level of service."
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Computation Theory versions of Go and ChessI'm sort of surprised no one approached it from this perspective yet:
Go and Chess are EXPTIME-complete. (when generalized to an nxn board). http://www.ics.uci.edu/~eppstein/cgt/hard.html
EXPTIME = Union (over k) TIME(2^n^k). This means that, were we to expand the the number of spaces on a chess board from 8x8 to 9x9 to
... to nxn it would become exponentially more complex with every step. All problems in EXPTIME are equally complex, so can be reduced to each other. So, if Deep Blue were generalized to play nxn chess, you could write a program that could (very quickly!) convert each Go move to a Chess move and ask Deep Blue what to do.There are several basic classes of complexity: POLYNOMIAL TIME, Nondeterministic POLYNOMIAL TIME, POLYNOMIAL SPACE, EXPTIME, etc... The easiest way to understand these is to see what kinds of problems they each contain.
Checking if something is alphabatized is in P - you can just go straight through and do it.
Factoring Primes is NP-Complete -- you have to try every combination to find a factorization
Checkers and Othello are PSPACE-Complete -- every possible move leads to a completely different set of subsequent moves, but pieces can't be removed (othello) or game play is just too simple (checkers).
Chess and Go are EXPTIME-Complete -- spaces can be filled, emptied, and refilled. Something about KO in Go makes it EXPTIME-Complete (and not just PSPACE-Complete).Hopefully all that made some sense. If not well, it took a whole class (possibly the hardest CS class I've had) before it all made sense to me.
So Go is only harder for the computer because it has a higher branching factor, or basically because it's on a 19x19 board instead of 8x8. The article says the branching factor is 25-35 for chess and around 240 for go.
A couple questions I have is
1) How many possible games are there? I'd guess Go has on the order of 361!. I think the number for chess has been figured out... anyone know?
2)More interestingly, is Go a harder game than Chess for humans? Or are they both so obscenely complex that our pattern-matching/heuristic skills take over and perform the calculations necessary to play well in either game? -
For those who jockey the complexity of their games
For those who want to jockey about the complexity of the games they play, here's a link that gives the computational complexity of a variety of games, along with references.
Of course, if you're really going to get into arguments, you might want to research it a bit more, but it's an interesting site nonetheless. -
Re:My experiences with the Prius
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ACE has the answerThere is a simple profiling capability in the ACE toolkit, the ACE_Profile_Timer. Easy to wrap in a class with basic Start, Stop, and Elapsed methods. If you can guess what function or two the bulk of your program's time is being spent in, this can help pinpoint the worst offenders within that section of code. If not, create several timers, and time each function in your main loop, and print the information after the loop is finished. Drill down into subfunctions as needed. See where the milliseconds tick away. You might be surprised.
And remember, in the immortal words of Michael Abrash, "Assume Nothing. Measure the improvements. If you don't measure, you're just guessing."
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Stretched Asshole
To the tune of Garbage's 'Cherry Lips'
Stretched Asshole
He showed you everything he had
But he was old and male
Your face is turning pale
You didnt have to turn around
But when his shit came out, you went and whipped it out
And started stroking up and down
It was the sickest thing that you had ever seen
He's such a filthy old man
In Xmas island domain
From in a concealed troll link
It is making you squirm
With his stretched asshold and bright red vains
He could make grown fags gasp when he exposed his ass
Now all the slashdot trolls agree
It is with out a doubt, the sickest thing you'll ever see
It seemed like goatse.cx would appear
Whenever you came near the nerds would start to fear
Now thats an ass you'd like to spear
You'd like to spank and fuck and then to have him call you "Dear"
[Repeat]
You hold a gerbil in your glove
You like to give him, filthy love
You make his rectum wanna dance
As you lube, and let him take your pants
Go baby go go, we're right behind you
Go baby go go, yeah, we're looking at you
Go baby go go, oh ,we're right behind you
Go baby go baby, yeah, we're right behind you
Go baby go baby, oh, we're right behind you
Go baby go baby, yeah, we're looking at you
Go baby go baby, oh, we're right behind you
Go baby go baby, yeah, we're looking at you
[Repeat **]
Go baby go baby go, filthy old man
Go baby go baby go, In Xmas island domain
Go baby go baby go, From in a concealed troll link
Go baby go baby go, It is making you squirm
Go baby go go, go
Yeah, we're looking at you
Go baby go go, oh, we're right behind you
Vote #1 TrollBurger
Here and Here
Written in a few bored minutes,
Thankyou and I want to have your children.
And i missed first post because I was taking a shit - seriously. -
Faculty pageHere's his faculty page with a links to pics of the model built by Boeing.
He teaches an undergraduate aircraft performance course at UC Irvine, and is overall a pretty wonderful guy.
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White Noise Generators
These guys seem to claim the noise is good for you! I quote the bit of interest for the guys to busy to read the whole thing.
A recent advancement in technology that is becoming widely used in psychological counseling and health service settings is the random noise generator. These devices, similar to the size and configuration of a smoke detector and/or an air purification device, emit a wide frequency band described as "white" or "pink noise." Adjusted to a relatively low level, these can be effectively utilized in the spaces in which the client interaction occurs to mask undesirable environmental sounds without negatively impacting the client interactions by being intrusive in nature.
AFAIK the noise from a fan is pretty close to white.
Seems that in medicine though there are always conflicting studies so I expect to be presented with the opposite result in a case study. -
RedHat RPMs still without TrueType fonts
The official Mozilla RPMs for RedHat 7.2 are still built without TrueType font support. If you care for decent fonts on your screen, here is a build with freetype2 enabled:
http://nil.ics.uci.edu/~gal/download/mozilla-1.0.0 -freetype2 -
Re:Cool!Java is a nice enough programming language, and it's bytecode is ok, but for a really elegant solution to the problem, check out Slim Binaries (native PDF format or google's html format, Communications of the ACM, Dec 1997, Vol. 40, No. 12.
Slim Binaries not only solve the problem of compatibility between different architectures, they also allow to fine-tune the object code towards the specific processor and operating system version that it will run on.
The basic idea is that the compiler stops after generating the parse tree and encodes that. Code generation is then done at runtime. It's similar to the idea of using bytecode for a virtual machine, except that unlike bytecode, parse trees are much easier to inspect as they are of a symantically higher level. This means that it's a heck of a lot easier to recognize (for example) IPsec crypto processing and offload it to the integrated IPsec hardware on your ethernet card without the programmer having to do the footwork involved in detecting the device. Slim Binaries also make code verification a reasonable prospect, which is very exciting when you consider the security implications of applets and agents.
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Re:We need an XML standard to move mail aroundMIME *IS* easy to decode.
ha ha ha ha!
HA HA HA HA!
ROFL.
have you actually read any of the (many) MIME RFCs? there are so many traps and pitfalls lurking there that to say that MIME is easy to decode is just untrue. -
MH: been there, done thatAm I the only old fart left that uses MH from the command line?
If I recieved Slashdot Poll postings as e-mail messages, I might use the following to find recent common whining about lame slashdot poll choices (and faster too!):
cd `mhpath +slashdot`
pick -subject CowboyNeal | xargs egrep -i 'this poll sucks' | sed -e 's/:.*//' | uniq | xargs show
Go to the link above, or look for MH or NMH in rpmfind.net or your local ports tree.
-ez -
Dolphin DemonThe cool chip site is real gem - I'd invest in them for the entertainment value, no question. But physics??
See this explanation for some cautionary tales; it's not exactly the same, but you'll get the gist.
Someone has done their physics homework well and got a real patent (yes, I looked it up at the The US Patent office) apparently on the strength of some nano-technobabble. Jeepers.
So, now Mr. Dolphin, tell us how much power it takes to cool our chips?
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Isn't this Maxwell's Daemon?Of course, some electrons have high energy, while some electrons have low energy. The low energy electrons are cold, while the high energy electrons are hot. Cooling with electrons involves encouraging the high energy electrons to escape, bringing in low energy electrons to replace them.
Isn't this exactly the same as Maxwell's Demon, which violates the second law of thermodynamics?
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Re:Good idea...in theory...
Wow, reminds me of this apropos joke...