Domain: stanford.edu
Stories and comments across the archive that link to stanford.edu.
Comments · 4,853
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Re:You really see which DNS does heavy lifting.[ http://cr.yp.to/djbdns/other.html ]
Other DNS software
Management tools
twa lets authorized browsers edit the tinydns data file.
ldap2dns converts an LDAP DNS database to a tinydns data file. tinyadmin is a graphical interface to the LDAP DNS database used by ldap2dns.
mkdns converts a MySQL DNS database to a tinydns data file. It lets authorized browsers edit the MySQL DNS database.
sql2tinydns is similar to mkdns.
dhcp_dns watches dhcpd for new DHCP address assignments, and publishes those addresses through tinydns.
tinydyndns publishes dynamic IP addresses authenticated through POP connections.
Servers
ldapdns publishes DNS information from an LDAP database.
MyDNS publishes DNS information from a MySQL database.
Posadis publishes DNS information from BIND-style zone files. Security history: Buffer overflow, allowing attackers around the Internet to take control of the server; fixed in m5pre2 (2002.03.30). Someone announced an exploitable buffer overflow in m5pre2 a few weeks later; the history here isn't clear from the Posadis web pages.
NSD publishes DNS information from BIND-style zone files. Security history: Unclear. The NSD documentation includes bugs like ``Very strange coredump in hash_destroy() that happens sometimes'' without any analysis of their security impact. Is that an exploitable buffer overflow?
PowerDNS publishes DNS information from MySQL databases, PostgreSQL databases, Oracle databases, IBM databases, LDAP databases, or BIND-style zone files. Security history: Unclear, like the NSD security history.
MaraDNS is a general-purpose DNS server.
lbnamed is a load-balancing DNS server.
lbdns is another load-balancing DNS server.
Oak DNS Server is a good example of why novices shouldn't try to write DNS software. The digitallumber.net domain, served by Oak DNS Server 1.0, is inaccessible to a huge number of clients that try AAAA lookups before A lookups: the server incorrectly returns NXDOMAIN for AAAA, effectively wiping out its own A record.
Caches
pdnsd is a DNS cache. Security history: Remotely exploitable buffer overflow; fixed in 1.1.7a (2002.01.18).
MaraDNS can act as a cache.
I don't know why anyone would want to use these caches in place of dnscache .
DNS clients
adns is a DNS client library.
ares is a DNS client library.
perldns is a DNS client library for Perl.
The Buggy Internet Name Daemon [how very professional... *sigh*]
BIND is a monolithic server/cache; it also includes a client library, libresolv. Security history: IQUERY buffer overflow in BIND before 8.1.2-T3B (1998); NXT buffer overflow in BIND before 8.2.2-P4 (1999); nslookupcompla
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Linking
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Re:It was obvious to me...What about when he used his super X-Ray gun (I forget what it's called...) to look inside of Bender's head and it showed a 6502 CPU?
To quote this site:
The key component of the NES system is the MOS 6502 CPU. This is the main processor where the game's code is executed. This CPU was very popular in the 1980's where it was used in some of the first personal computers including the Commodore 64, Apple II, and the Atari systems.
I thought that was hilarious, but most others I've spoken to have completely missed the joke, even if they did see the "6502" number. -
Re:Check out Planet CCRMA
This excellent round-up of Linux digital audio software (including low-latency kernels) is a one-stop shop for all your recording needs:
... if you are on RedHat or FC. But you are perfectly right, Planet CCRMA is very good, too. -
Re:Yawn...
I simply want to reprogram it for use as a Ray Tracer instead of a polygon rasterizer.
SOMEONE ELSE HAS ALREADY DONE IT.
How many times do I have to say this?
Timothy Purcell at Stanford University did it two years ago.
So stop wishing 'if it were only possible' to do something that people have already done. Read my link, and if you want to be polite, thank me for showing you where to find exactly the kind of information that you were complaining didn't exist. -
Re:Prior usage?
Thanks for that link. That paper references this paper (PDF) by M. Sahami, S. Dumais, D. Heckerman, and E. Horvitz."
They seem to be the first Bayesian Spam Filterers. So if the patent belongs to anyone, its Microsoft and Stanford University.
Doesn't that make you feel better. -
Links
http://graphics.stanford.edu/papers/rtongfx
http://graphics.stanford.edu/papers/tpurcell_thesi s/
http://graphics.stanford.edu/papers/photongfx
(And not a karma whore in sight.) -
Links
http://graphics.stanford.edu/papers/rtongfx
http://graphics.stanford.edu/papers/tpurcell_thesi s/
http://graphics.stanford.edu/papers/photongfx
(And not a karma whore in sight.) -
Links
http://graphics.stanford.edu/papers/rtongfx
http://graphics.stanford.edu/papers/tpurcell_thesi s/
http://graphics.stanford.edu/papers/photongfx
(And not a karma whore in sight.) -
Re:Yawn...
Two points:
First, Why? Most people don't even make movies that are raytraced.
Second, they already are doing raytracing on the GPU. Purcell had one working in 2002. There was a presentation on it, in a course at SIGGRAPH 2003. The GPU is maybe a little faster than the CPU, right now, for raytracing.
"Tweaking OpenGL" is kind of like saying "tweaking the CPU", any more. It's fairly close to a generalized stream processor. And their specs already are open enough to have figured this out. Look at GPGPU and read some more about how people are doing amazing stuff on the GPU today. No need to wait for ATI and NVidia to open up any specs - they already did. Cg and GLSlang are fully up to the task.
And, photon mapping and similar techniques are much more sophisticated than raw raytracing. -
maybe...
I have seen a project to run programs on a gpu, with BrookGPU.
It would only be applicable for certain applications, but some of the things that a graphics card excels at (I think) are linear algebra, vector manipulation, and some other number-crunching activities.
You can't run linux on it though, just programs written in Brook Stream language (an extension of ANSI C). -
The air-table robot thing is not new
Stanford has had air-bearing robots to simulate space operations for over a decade. Theirs, though, carry an air tank and work against a flat granite slab.
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Re:Skip Intro? No, Skip Site
How to feel like a tit: Note that 'Flash implies no content' is not the same as 'No content implies Flash'. So really, 4. Shut the fuck up. I am asssured that you enjoyed the process.
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Re:This really isn't surprising
Look up Nick Foster, the number one researcher in Fluid Dynamics for graphics. He's not at Pixar, but at PDI/Dreamworks. Ever wonder why the water in Shrek 2, Shrek, and Antz looked so good?
Here's a good start -
Temporary Mirror at Stanford University
http://www.stanford.edu/~jstockdl/tmp/usbwifi.orc
o n.net.nz/
Mirrored as much as I could of the images before the server was smoked.
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Re:No, there are other considerations
> What happened at Guantanamo? I have never heard of anything hapening there.
There is some coverage in the margins and in the liberal and alternative media.
> US Army and our country as a whole is not responsible here
I disagree. These actions were the predictable outcome of a war the US is waging. That includes the citizens who provide tacit and explicit support for a war (i.e. everyone). It's basic social psychology that abuse will escalate when third-party safeguards are not in place, no matter how righteous the jailkeepers are. The US insisted on invading Iraq without clear multilateral support. The US failed to provide the proper checks in the prisons. The US has argued for a loosening of civil rights and advocated torture in response to the threat of terrorism. (read the very public commentary on the subject starting from 9/2001 to before the Gitmo detainees were released several months ago).
> It sounds like, to me, that our government IS doing the right thing and IS
> following the Geneva Convention.
Except when they aren't, which is often.
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Re:Fair enoughHey, I was wrong, and I don't mind admitting it. Check this out:
[An example of] Fair use. In a lawsuit commonly known as the Betamax case, the Supreme Court determined that the home videotaping of a television broadcast was a fair use. This was one of the few occasions when copying a complete work (for example, a complete episode of the "Kojak" television show) was accepted as a fair use. Evidence indicated that most viewers were "time-shifting" (taping in order to watch later) and not "library-building" (collecting the videos in order to build a video library). Important factors: The Supreme Court reasoned that the "delayed" system of viewing did not deprive the copyright owners of revenue. (Universal City Studios v. Sony Corp., 464 U.S. 417 (1984).)
I was wondering what "time shifting" meant. I think that this strengthens your argument* a bit, eh? (I was going to post this with my "bad" post, but I wanted you to see my retraction.)
* that it is okay to copy the analog signals. -
Re:Fair enough
Actually I hadn't. I was hoping that you would have included your link in with the assertion. I assume that you agree that it is preposterous. Thanks for putting the link up. I'm going to go read it now. Check out Stanford's take though.
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Re:Fair enough
I see that the posters to this parent are starting to throw poo around without any supporting links. Take a look at Measuring Fair Use: The Four Factors (while you're at it, keep reading). I would hope that we can agree that Stanford is a trustworthy source. I would think that they would prefer "Information to be free," so using their explanations should be acceptable when I am criticizing the misuse [IMO] of "Fair Use."
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Re:Just standards?"China risks isolating itself if it creates standards that are incompatible with the rest of the world."
Not as much as the US risks isolating itself with it's deliberate unilateral foreign policy
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Interesting thing about "David"
: it'll be hard to condemn the statue of David as an evil
: pornographic thing, considering its based on the bible
Definitely not pornographic, but one can consider the Bible evil! It has some extremely violent parts, you know... but the really funny thing is: David's statue is not too faithful to the Bible, as it actually fits the greek ideal of beauty.
Take a look at his genitals. David - a jew - is NOT CIRCUMCISED. I think Michelangelo did not give a damn about the Bible then, he simply tried to make it the apex of human male beauty. And he followed the ideals of the Greek, who (correctly) saw the circumcised body as mutilated and sexually inferior. -
innovation?
And Microsoft could build software into its desktop version of Windows to harness the power of PCs, letting companies get more value from their computers. It's a technology that's applicable to tasks such as drug discovery and microchip design.
sounds a lot like seti@home, folding@home, or the grid project. Another example of embrace and extend. It's definitely going to be interesting when pc's are networked for spare cpu cycles as a normal everyday event. Maybe the can use all that cpu power to get some AI to rewrite windows code so its bulletproof.
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Re:Nuclear is also a limited resource.
There is enough uranium and thorium on earth to last us billions of years.
Speaking more in the short-term... we throw away over 90% of the energy in the uranium we use now. It's all sitting there in spent fuel storage pools, waiting for reprocessing. Lots of energy there. Plus, there's more thorium than uranium, and we haven't even begun to tap that resource. Well, actually India is planning to.
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The best analysis I've seen so farFrequently asked questions about nuclear energy
(John McCarthy is known for being the man responsible for Lisp, and some AI research, among other things. I'm surprised that the pages I'm pointing to haven't been mentioned yet in this article.)
Also, you may be interested in his take on progress and sustainability.
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The best analysis I've seen so farFrequently asked questions about nuclear energy
(John McCarthy is known for being the man responsible for Lisp, and some AI research, among other things. I'm surprised that the pages I'm pointing to haven't been mentioned yet in this article.)
Also, you may be interested in his take on progress and sustainability.
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Re:fair use
Those usages are specifically written into the fair use laws. You can of course copy parts of an article for illustrating a point in class. OTOH, if you want to copy a whole article, you should probably ask the author.
I don't think there's anything that stops folks ripping a snippet from their CD or a radio broadcast and using it as thier ring tone. Somebody selling 10% / 15 second snippets (maybe looped) probably doesn't have the law on their side - eg, it's not being used fairly, but capitalizing on others work - but Joe Public does, especially if they alread have the track on other media. Eg, buy on iTunes and beam to your cell phone == ok in my book.
I think it comes down to "does this usage damage the market for the music?" And I think the answer is no. People aren't going to buy a CD just to get the track to use as ringtones, and having the ring tones won't stop you buying the CD to get the whole song... so, no harm no foul.
"Unfortunately, if the copyright owner disagrees with your fair use interpretation, the dispute will have to be resolved by courts or arbitration." So if the RIAA decides to get silly about this, you get the choice of being first to fight them and prove them wrong, or settling for a sum smaller than the cost of going to court.
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Re:Harm, Where?How about A meta-analytic examination of assumed properties of child sexual abuse using college samples.
This "study" by Rind, Tromovitch, and Bauserman has been debunked. It is junk science, although it seems to be quite popular, in a self-serving way, among pedophiles.Citing questionable research methods and misleading reporting of data, Stanford researchers and other experts have debunked a controversial 1998 study that said sexual abuse may not cause long-term harm to children. According to Stanford researchers and colleagues from the Leadership Council on Mental Health, the authors of the 1998 study misled the public by presenting data that disguised the full ramifications of child sexual abuse. A scientific critique of the study was published in the November issue of Psychological Bulletin
"It's basically sloppy science," said David Spiegel, MD, professor of psychiatry and behavioral sciences and senior author of the critique. "They made a lot of mistakes." After the initial study?s release, it led to an uproar in Congress and an unprecedented unanimous vote formally denounced its conclusions.
Spiegel said that the mistakes, appear to have skewed the results to support the authors' own hypothesis. Of greater concern, he added, is that because the paper has become a tool to overturn sexual abuse cases in the courts, the paper's conclusions have had the potential of causing damage beyond the realm of the science.
The study by Bruce Rind, PhD, Phillip Tromovitch, PhD, and Robert Bauserman, PhD, (from Temple Univer-sity, the Maryland Department of Health and Mental Hygiene and the University of Pennsylvania, respectively) first appeared in the July 1998 issue of Psychological Bulletin. The authors concluded that especially in the case of boys, the effects of child sexual abuse had been overstated and in some instances, the incident had been either a neutral or even positive experience.
When Spiegel and others re-examined the data, they found the initial analysis plagued by a number of problems, including biased samples, inclusion of relatively mild sexual encounters in public settings as examples of sexual abuse, misreporting of original data, and failure to correct for sources of statistical anomalies. Together, Spiegel said, these problems served to minimize the association between child sexual abuse and subsequent psychological difficulties. Despite the errors, Spiegel noted, the 1998 meta-analysis still reveals a link between a history of sexual abuse and an increased vulnerability to a wide range of mental health and social problems in adult life. According to Spiegel, this clear link was downplayed by Rind, Tromovitch and Bauserman in their conclusions.
Spiegel said he was most disturbed by the study's conclusion that some children may have consented to sex, and therefore did not suffer psychological trauma from the experience. The authors advocated for a change in terminology to describe various sexual interactions. They suggested, for instance, that what was described as "willing" encounters between a child and an adult should be termed "adult-child sex," rather than "sexual abuse."
"Not only is such a conclusion from the data scientifically unjustifiable, but it is morally quite disturbing," Spiegel said. "Children cannot sign contracts or consent to medical procedures, so how could they "consent" to sexual involvement with an adult?
"I think sometimes people are too willing to accept research that shows that long-held clinical beliefs are wrong," Spiegel said. "Clearly it's important to examine these beliefs, but in this case the research was so poor it does not merit overturning solid clinical and research evidence that child sexual abuse often does lasting harm," Spiegel said.It is perfectly normal to jerk off to images of naked kids or kids having sex.
No, it isn't normal, at -
BrookGPU
You mean something like this?
BrookGPU -
Re:the real value of SETI
I think SETI is worthwhile and I would never suggest someone is wrong for helping that project, but given the millions of machines used for it I have to wonder if maybe, just maybe, a half million more machines being used for folding@home would be more productive for us right here and now.
For instance, we already know that intelligent life is fleeting and precious. We are already aware of our own mortality and can extrapolate from that there is an end to all things. It doesn't require alien communication to bring us this news. Alzheimer's makes a painful example of the fleeting nature of intelligence. Currently, it is destroying many wonderful examples of that intelligent life. It's important to help protect that life as soon as possible.
We might find another civilization that is perfectly harmonized with their knowledge. I doubt it, but it is possible. However, would not it be at least as valuable spending resources to improve our ability to use and understand our technology here and now?
Helping ourselves learn to live with our technology seems much more likely if we spend the time doing just that rather than hoping someone can show us how.
That said, I think it is important to keep doing the project and in truth, every now and again I contribute some work units to SETI. But I have to admit there are other concerns that are at least as important. Please take the time to try other projects such as
Folding@home now and again. Every little bit helps! -
Consider Folding@home instead of SETIWhile SETI is the granddaddy of the distributed computing projects, there are now a number of others one out there, and I'd suggest folks interested consider Folding@home run outa Stanford University where they are using the idle CPU cycles for protein folding research on cures for diseases.
While most
/.'ers will probably run the FAH client, even Google supports Folding@home - read more at their Google Compute FAQ which allows you to run it as part of the Google Toolbar - heck, I even have my mother helping out this way since it is so super-easy to install.And if you do decide to support Folding@home, consider joining a team - if you don't have one, you are welcome to sign up for my Google Compute team
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the real value of SETI
SETI@home has been getting dissed a lot lately. "Why are you wasting your cycles on this useless project?" some geeks ask. "Why aren't you spending them predicting climate change, fighting AIDS or curing Alzheimer's? You could be saving people from anthrax, smallpox, Ebola, or SARS."
These are all noble goals, worth pursuing. But SETI has a noble goal that doesn't get talked about very much.
Most SETI research so far has been focused on the so-called "Water Hole", the quietest part of the radio spectrum which happens to fall between the radio spikes of hydrogen and hydroxyl, around 1.4 gigahertz. If there's another water-based civilization out there, it's easy to see that this is a logical place to broadcast or listen. (Projects like Danny Hillis' Clock of the Long Now enable me to imagine a future in which we broadcast a message of our own, someday.)
"So what happens if you listen and you don't hear anything?" you ask. Well, even if we drain the Water Hole and find nothing, we'll still have learned a great deal from the process. We'll know there likely aren't any civilizations remotely like us in our galaxy. We'll know that previous civilizations, if there were any, were not able to sustain themselves. We'll know that intelligent life is fleeting and precious in the universe. And this should make us think hard about our own civilization.
If we're ever forced to acknowledge that there are no intelligent radio signals in the universe, then we must also acknowledge that the odds of our own survival just became much bleaker. Knowing that space is quiet means it's more important for us to be careful than we thought. The longer we search without finding any intelligent signals, the more likely it becomes that intelligent civilization isn't some pretty 4th of July sparkler; it's nitroglycerin, waiting to explode. This is incredibly valuable knowledge, life or death knowledge that's worth going after.
The biggest reason to look for a signal in the first place isn't to commune with E.T., but out of pure self-interest. Any number of systems failures could wipe us out as a species, from a single well-designed terrorist plague to GMOs with unforeseen environmental consequences. How do we as a society learn to play nice with technology? Has anyone else in the universe done it? If we found evidence that someone out there had, it would stand as a beacon, showing that we can probably do it, too. And if we don't find a signal, it means a bell is probably tolling our end somewhere, and we'd better think long and hard how to change that.
So feel good about SETI. It's not just about searching for aliens, it's about searching for a cure for extinction. -
Re:Google's immortal cookie
Another newsflash, Google divulges that it does not track your searches except in aggregate.
Wrong.
Google's privacy policy clearly states it will hand your specific (pertaining only to you, and you alone) information over to any valid legal process that asks for it.
So it IS tracking your searches. It IS capable of indentifying an individual, and it WILL hand that info over following a court order. Following an IPO and a shareholder revolt, there is nothing that prevents that information being handed over to advertisers as well.
Google makes millions from advertising. PageRank (TM) is a trade secret, yet read this from their stanford paper.
This causes search engine technology to remain largely a black art and to be advertising oriented (see Appendix A). With Google, we have a strong goal to push more development and understanding into the academic realm.
Search engine tech as a black art, search engine tech as being advertising orientated.
So tell me when PageRank (TM) was open sourced, and when did google.inc stop deriving 99% of its income from adverts? -
Principles Change
In 2000, Google's founders defined a set of principles for a quality search engine:
[W]e expect that advertising funded search engines will be inherently biased towards the advertisers and away from the needs of the consumers...[W]e believe the issue of advertising causes enough mixed incentives that it is crucial to have a competitive search engine that is transparent and in the academic realm.
Today, about 95% of Google's $1B+ revenue comes from advertising, and Google's lawyers forgot to to check the "This will be an academic-only IPO" box on their SEC paperwork.
Four years from now, will Google's institutional shareholders feel bound by today's Software Principles? -
Re:Familiar pair for atheists.
Logic is an invention. It was created by someone to try to explain the natural things that they experienced.
Some useful links
There are other forms of Logic that have been invented, and each holds it's own set of truths. You cannot say that Logic itself is a natural thing. If it were, you'd be able to show logic to me. It exists in the mind of man, and only in the mind of man. It is expressed through language, which is also an invention of man.
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Re:Shows
It also tells employers that the holder of the diploma is likely have an IQ above some threshold.
The IQ threshhold for obtaining a degree from some prestigious institutions is not necessarily as high as you guess from looking at the highest IQs of rejected applicants.
Some accepted applicants with family money and connections and just spending some time at a high quality private school can obtain entrance with a lower IQ than someone coming from left field, no money, no name, average public high school.
The degree and GPA is just a rough and crude sorting mechanism. It is not always fair, nor is it always effective, but it's easy and convenient for employers to use to do some initial screening.
A number of years ago at a fluid dynamics conference Robert T Jones was honored for his achievements. IIRC from the introductory biography, his career was more remarkable because he possessed no formal college degrees.
I suspect raw talent and self education go further in nascent fields, of which aeronautics was one in the last century and of which IT was in the last couple of decades.
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GNU Nana for C++
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Dismally Realistic ScienceI have a degree in economics and I've done a lot of environmental economic research.
Bully for you!
In the long run, of course, we are all dead, but also in the long run human cultures can and will adapt to a world of incredibly expensive, rare oil.
The question is whether that is a world that can sustain 8+ billion people at anything like the current astonishing consumption rate.
I'm given to understand that economists spend a lot of time measuring the theoretical epiphenomenon known as "productivity" within an "economy". I put it to you that a major input into measurements of productivity is in fact trapped solar energy in the form of fossil fuels.
The transition from a medieval society based on slaves/serfs and water/wind power to the consumption of fossil fuels on a vast, increasing scale over past few centuries is what has enabled us to move from agrarian to an urban societies. We no longer require vast armies of slaves and serfs to till our fields and shit in them - instead we burn fossil fuels to till the, and convert more fossil fuels into fertiliser. By burning 400 years worth of solar energy input every year, we have increased producitivty massively, freeing up hundreds of millions of bodies to work in urban manufacturing and service jobs. We have created our economies, literally, by burning fossil fuels.
Unlike economics, physics and geology doesn't work in a vacuum or a finely divisible continuum of graduated, switchable inputs. There is a finite limit to growth, dictated by several realities: total solar output, diameter of the earth, effectiveness of photosynthesis, energy conversion efficiencies, and so on. We could, as you say, transition our cultures to move from fossil fuels to other power sources, but what are the consequences?The fossil fuels burned in 1997 were created from organic matter containing 44 × 1018 g C, which is >400 times the net primary productivity (NPP) of the planet's current biota. As stores of ancient solar energy decline, humans are likely to use an increasing share of modern solar resources. I conservatively estimate that replacing the energy humans derive from fossil fuels with energy from modern biomass would require 22% of terrestrial NPP, increasing the human appropriation of this resource by ~50%.
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Re:getting around the IP blocksI know there is are several commonly used tools that are ommited from fedora to avoid the IP issues. playing DVDs, Samba and a couple of others. Does anyone have a link to howto on what needs to be installed after the install to make it a regular useful distro?
Samba is included, as is the new CIFs driver which replaces smbfs. What isn't included is the NTFS read-only driver module, which you can download as a binary RPM from linux-ntfs. As for the other stuff, I like to use the fedora.us + livna.org* repositories. There is also freshrpms, ATrpms, Dag Wieers, and Planet CCRMA. There are others, and be warned that Dag Wieers and Axel Thim (atrpms) are in a pissing match over Dag obsoleting at least one of Axel's packages for naming it "wrong". (look at the April acrhives of the freshrpms mailing list with some fresh popcorn).
* - The livna.org front page still says they are down and lists the mirror. The rpm.livna.org repo is actually back up, they just never bothered to update the main page to say so.
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Re:there's more than one way to skin a catThe problem is that bringing the entire planet up to first world standards of living requires more energy and natural resources than we have available on Earth.
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Please learn how to make links.Please learn how to make links.
<a href="http://www.stanford.edu/~moore/HooveronReli
yields: This is one of the surveys.g ion.html"> This</a> is one of the surveys. -
Re:Define SpaceAmsat have been putting up payloads for 30 odd years - they piggyback as ballast on other people's launches.
There a bunch of other amateur satellite projects - for a start check out:
http://cubesat.calpoly.edu/
http://ssdl.stanford.edu/
http://www.arliss.org/ -
Famous scientist believers [Re:Familiar pair...]By most surveys, more than 90% of professional scientists don't believe in a personal god.
Except for the best ones. Like Stanford's Donald Knuth , for example.
Or take the case of Reverend Thomas Bayes, the parish priest who discovered Bayes' theorem, on which modern machine learning/data mining relies so heavily, including spam filters named after him.
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Re:Others.
Here's a column I wrote a day ago about this subject for the Stanford Daily:
Video Game Studies -
The principle of Entanglement
is neatly explained in this stanford page.
Dunno if anyone mentioned it, but Michael Crichton's Timeline was based on time travel using the concept of parallel universes. Crichton neatly details an experiment to show the principle of entanglement. (sad that the movie did not deal with the science at all) Read the book for some nice fun with this concept. -
Air pollution is not strictly a recent phenomenonThere is a common misperception that air pollution is a recent thing.
This from Environmental History Timeline:
1661 -- John Evelyn writes "Fumifugium, or the Inconvenience of the Aer and Smoake of London Dissipated" to propose remedies for London's air pollution problem. These include large public parks and lots of flowers. http://users.synflux.com.au/~ant/Evelyn/fumifug.ht ml http://www.accd.edu/sac/english/bailey/evelyn.htm
"The immoderate use of, and indulgence to, sea-coale in the city of London exposes it to one of the fowlest inconveniences and reproaches that can possibly befall so noble and otherwise incomparable City... Whilst they are belching it forth their sooty jaws, the City of London resembles the face rather of Mount Aetna, the Court of Vulcan... or the suburbs of Hell [rather] than an assembly of rational creatures..."
In his diary, Evelyn writes in 1684 that smoke was so severe "hardly could one see across the street, and this filling the lungs with its gross particles exceedingly obstructed the breast, so as one would scarce breathe."
And this from Air Pollution:
In the Middle Ages London air was so polluted by smoke from coal fires that in 1273 Edward I passed a law banning coal burning in an attempt to curb smoke emissions. In 1306 a Londoner was tried and executed for breaking this law. Despite this, pollution was not checked, and on one occasion in 1578 Elizabeth I refused to enter London because there was so much smoke in the air. Smoke killed vegetation and ruined clothes, and the acid in it corroded buildings.
I always wondered if this early pollution may have contributed to Europe's mini-ice age
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The real question
Is this compatible with Brook and other general-purpose GPU programming techniques? The use I see for it is this:
Imagine an openmosix cluster of dual-processor machines that run bioinformatic calculations and simulations. Lots of matrix math and such - pretty fast (and definitely a lot faster than a single researcher's machine).
Now imagine the same cluster but each machine has 2 or 4 dual-head graphics cards and each algorithm that can be created in Brook or similar is. That gives each machine up to 2 CPU's and maybe 8 GPU's that may be used for processing. The machines are clustered so a group of ~12 commodity machines (1 rack) could have 24 CPU's and 96 GPU's. Now that would be some serious computing power - and relatively cheap too (since 1-generation old dual-head cards are ~$100-$150).
By the way, does anyone know if there is any work going on to create toolkits for Octave and/or MatLab which would utilize the processing power of a GPU for matrix math or other common calculations? -
Re:Dear trojan writers.
Hey, why not just put the person's computer to use for a good cause, like Folding@Home or something?
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Re:United Devices
Last time I checked, the UD client was Windows only.
Perhaps a give away to Folding@Home wouldn't be so bad. -
Folding@Home URL
Sorry, it looks like the URL has changed. The home page for Folding@Home is here.
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Picture here.
http://www-formal.stanford.edu/annap/www/annap-pi
I mean, be for real - who gives a damn about the article?c .gif