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Sounds like a neat project. I'm strictly amateur, but I'd say you want to prevent heat transfer through convection, conduction, and radiation. Tape a magnet to the cube and use an opposing magnet to levitate it, eliminating conduction. Put this assembly inside a stoppered flask and pump out the air, eliminating convection. Finally cover the whole thing with fabric opague to light to eliminate radiation. The above should easily stay cold for 5 hours. You might even be able to skip the vacuum (which can be tricky) and succeed with just the maglev and light cover. Good luck Ed StrongReturn to Top
Need help locating any info on the phyics of volleyball. HELPReturn to Top
In article, meron@cars3.uchicago.edu wrote: , There is a fact that people rarely talk about.....the current government <>in the U.S. is really one that has been elected by a minority of the <>voters. Assume that 50% of the registered voters vote. The candidate <>that wins gets 50% the votes (it is usually less). At most, only 1/4 of <>the population decided who should run the country. <> Return to Top
Subject: Re: Einstein's Constant
From: James.Steigelmann@capncc01.ssw.abbott.com (Jim Steigelmann)
Date: 14 Jan 1997 16:07:56 GMT
In article <32DB0209.78D2@quadrant.net>, bfielder@quadrant.net says... > >Excuse me, I was merely waxing philosophical. > >For the record though, I tried to define a physical "constant" as a >"number" which cannot be represented as a real number in any integer >based counting system, and which relates any number of dimensions to an >additional one. Why are you excluding all "real" numbers from your definition of a constant? > >I was not quite clear in my first posting, but I still feel that any >numerical system which uses "pi" or "e" as "one" will not relate to well >with everyday experience. > >Nor do I think that any numerical system which uses "e" as "one" will >find that either "pi" or "c" will end up being integers in that system. Reminds me of the HS geometry test, where the question was, "What is Pi R squared?", and one student answered, "A pop-tart". :) > >(Mind you, if anyone has come up with one, I would love to hear about >it.) > >I just find it intriguing that all of the most important nos. in any >system end up being irrational. What can I say - we live in an irrational universe! ;) -- --------------- Jim Steigelmann ---------------------------------------------------------- The opinions expressed are my own and do not represent the opinions of my employer, my boss, the state of Illinois, the government of the United States of America, or of the world in general... -----------------------------------------------------------Return to Top
Subject: Re: PH.D.s are useless
From: Anthony Potts
Date: Tue, 14 Jan 1997 16:11:50 GMT
On 14 Jan 1997, Jeff Candy wrote: > a very tough job to be a "good" trader. A good quant. will make > about 500,000 US per year. Enough to see you through the stress, > chain-smoking, alcoholism, drug abuse and heart disease to come? The thing is, though, that it's the good ones who don't get stressed, and don't get ill. If you are not sitting on a vulnerable position, crapping yourself about covering your risk, or clawing back last weeks losses, things aren't too bad. All the traders I know seem to be pretty laid back about the whole thing. Of course, they could just be hiding it well, but it doesn't seem to be that way. > > After a relatively low threshold (say, well below 100,000 US per > year) more money has only a weak influence on happiness. I'm > sure lots of traders would pay a fortune to have a nice physique, > or to be as happy as the surfer they see on rare occasion at the > beach. > Again, things are not too bad. One of the traders I know runs the five miles to work every day, a few others go immediately to the gym after work, and put in an hour before they go home. Of course, this is not always the case. Just about every member of my old boxing club has now moved on to the city, and they have certainly changed shape from their competitive days. The thing is, though, that they are planning to retire before they get old, and so are willing to put up with whatever it takes through the ten or twelve years that they are working. I hope that I am able to avoid getting stressed or losing my shape. It all depends, of course, on whether I have got what it takes to rise above the other traders. Only time will tell. Anthony Potts CERN, GenevaReturn to Top
Subject: Re: Help me with Newton's law F=ma
From: orie0064@sable.ox.ac.uk
Date: 14 Jan 1997 16:13:40 GMT
> From: sgoetz@ecs.fullerton.edu (Slawek Goetz) >Hi > >How did Newton come up with F=m*a. What experiment did he do? > >Any help is appreciated > >e-mail: sgoetz@titan.fullerton.edu I think F=ma is not so much a law as a definition. The real laws of newton were that: 1) If a body is not disturbed, it will stay where it is or move forever with constant velocity 2) The conservation of momentum: that every body has a quantity called mass, such that in every collision, m1v1+m2v2 will stay constant throughtout. From 2) one can define momentum & hence force. -- GT -- http://users.ox.ac.uk/~orie0064Return to Top
Subject: Note: Relativity and FTL Travel FAQ
From: hinson@london.physics.purdue.edu (Jason W. Hinson)
Date: 14 Jan 1997 16:24:19 GMT
Some of the readers of this newsgroup might be interested in a FAQ just posted to the rec.arts.startrek.tech newsgroup. The FAQ is called "Relativity and FTL Travel". Basically, it is a straight forward look (written for a non-technical person to follow) at Special Relativity, General Relativity, and the problems and "solutions" one finds when considering faster than light travel. For more information, read the "Introduction to the FAQ" portion which you should find in the r.a.s.tech newsgroup. You can also take a look at the HTML version of the FAQ via the world wide web from this URL: http://www.physics.purdue.edu/~hinson/ftl/FTL_StartingPoint.html Enjoy, and let me know what you think. -JayReturn to Top
Subject: Re: Condemnation of Atonality
From: Mark Starr
Date: Tue, 14 Jan 1997 08:26:00 -0800
Congratulations, C. J. Clark! You have managed to come up with a totally new theory of harmony, a theory that is totally unrelated to all the classic treatises of the past. Moreover, you have employed standard terms--such as consonance and resonance--in a way no one else does. I particularly loved your statement: "Good music bases 99% of its melodies on major and minor scales, Greek modes and their derivatives, pentatonic or any formal scheme of scale based on intervals other than seconds." By the way, on what does bad music base 99% of its melodies? Did you, by any chance, study harmony with the great theorist Albert Silverman? Regards, Mark StarrReturn to Top
Subject: Re: to keep an ice cube from melting
From: breed@HARLIE.ee.cornell.edu (Bryan W. Reed)
Date: 14 Jan 1997 17:02:48 GMT
In article <32DA48EA.61CC@ibm.net>, benReturn to Topwrote: >Hi people, > > My name is Ben, and I have a friend in elementary school who >needs some help for a science project. Using materials available around >the home, she must keep a single regular-sized ice-cube from melting for >5 hours. Nothing commercial such as igloo ice packs, or iceboxes are >permitted. > She's tried stuff like saran wrap, styrofoam bowls and wood >chips, but the cube is completely melted by the end of the 5 hours. Is it legal to chill the container before use? I would expect several layers of styrofoam initially below freezing would do it. Or just keep it outside . . . where are you? Have fun, breed
Subject: Re: "What causes inertia?
From: bonus@algonet.se (Bjorn Danielsson)
Date: Tue, 14 Jan 1997 19:37:48 +0100
Ken FischerReturn to Topwrote: > Bjorn Danielsson (bonus@algonet.se) wrote: (snip) > : If I plug in the numbers for the sun: 2.0E30 kg, and the sun radius == > : perihelion distance 7.0E8 m, and the speed 3.0E8 m/s for a probe entering > : the solar system, then Newton's theory (giving a hyperbolical path) will > : produce an angle of 0.872 arc-seconds according to my calculations. > : This is about half of 1.75. > > Good calculating, that is about what Einstein wrote > in the 1911 paper, 0.83 seconds of arc for the distance from > the Sun that he used. > It isn't a real complex equation after he shows how > it is done, but he was good at making complicated things > appear simple. I used the newtonian formula for orbits: r = r0/(1 + e cos theta). The only difficulty was to calculate the rather complicated expressions for "r0" and "e" (eccentricity), given only asymptotic speed and perihelion distance. I made no assumptions about invariant light speed, but the speed increase in this model is very small anyway. > If you are interested, it would be worthwhile to > get the Dover paperback with both papers, plus others, > for less than $10 US, titled "The Principle of Relativity" > by Einstein, Lorentz, Minkowski and Weyl. Thanks for the pointer. > : In the newtonian model the "probe" > : (the photons) will gain speed as the perihelion is approached, but > : according to relativity the energy increase is manifested as blue-shift, > : not a change in speed. So the angular deflection of the photons will be > : affected more by the gravitational acceleration than what the newtonian > : theory predicts. > > No, the path of the light being bent is not the correct > way to view the problem. Think of the Divergent Matter model, > where the light travels in a straight line, and in the underlying > physics, in addition to the acceleration of the surface of the > Sun, there is a velocity component (in GR maybe momentum would > be a better term). But the beam of light is really bent, since it's angle is changed. Consider this thought experiment: space is empty except for the sun, a powerful laser, and me. Both I and the laser are at very great distance from the sun, say several hundred thousand light-years. Without the sun, the laser beam would have a certain incoming angle in my region of space, but with the sun where it is, the incoming angle is different. Even in GR, where the path of the laser beam is at all times and places a geodesic, there is a real bending effect as seen from the faraway observer. > Even though Einstein seems to have taken a different > direction, from the Einstein Principle of Equivalence to > curved spacetime, he still expressed thought processes that > related to the equivalence of acceleration to gravity, but > a more complex geometry than a simple on dimensional acceleration > is involved. > This should be apparent, due to the fact that all > acceleration does is increase velocity, even though this > is the confusing part to anyone who has always thought > in the terms of classical physics. Velocity is both magnitude (speed) and direction. Acceleration can change only one (speed change) or only the other (rotation), or a little of both. I think Divergent Matter is an attractive idea, but it needs to explain rotation and not only speed change. I still can't see how this can be done without introducing some new element into the theory. > I am afraid I am not qualified to really approach > the problem mathematically, and the aspect of time dilation > is especially distressing to me now, because I am a mechanic > (or mechanicist), and if I don't know how the machine works, > I am not happy. > After 51 years of study, I am finally beginning to > understand the workings of the Divergent Matter model, and > I am amazed at how much it helps me approach problems in > General Relativity. > But there are lots of people who understand > General Relativity well, and I need to try to improve and > rewrite Divergent Matter and bring it up to date. > For it to have value, it must clearly describe > the same results as General Relativity, and both the theory > and the model will benefit. Agreed. Myself, I am only a layman who likes to play with math I learned many years ago, but my need to understand how the universe works is deep and serious. -- Bjorn Danielsson http://www.algonet.se/~bonus e x t r a l i n e s
Subject: Re: PH.D.s are useless
From: salem@pangea.Stanford.EDU (Bruce Salem)
Date: 14 Jan 1997 18:01:54 GMT
In article <5bev6g$1ld6@r02n01.cac.psu.edu>, ale2Return to Topwrote: >In article <5bdu4f$agl@interport.net> >cjc@interport.net (Cheng-Jih Chen) writes: > >> Oh, the joys of American anti-intellectualism. It's been part of >> American culture that the "common man", with little training but >> wads of common sense, will go further than someone with advanced >> training. While this _might_ have been slightly true back when >> we were mostly farmers, it certainly doesn't hold in an advanced >> industrial society. > >Microsoft Bill Gates didn't have a degree did he? No, he just a thrid degree greedy bastard, in the best American tradition. He dropped out of Harvard, was already a rich kid, and just knew have best to screw little people and the competation. Nice guy! Bruce Salem -- !! Just my opinions, maybe not those of my sponsor. !!
Subject: CRYSTAL polarizabilities
From: Patrick Jemmer
Date: Tue, 14 Jan 1997 17:11:35 +0000
This is a multi-part message in MIME format. --------------15FB59E21CFB Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hello all: just wondering if anyone is familiar with the Daresbury/Torino CRYSTAL (periodic Hartree-Fock) package.. I need to know a few things and am having one heck of a time getting through the manual! ;-) 1. How can one get polarizabilities (alpha) (etc)? (let's first consider just a simple system: the F- ion at the origin) I have naively been trying to create 2 H+/- "point charges" at a large separation: then use perturbation theory to find: alpha = (energy(with field) - energy(no field))/field^2 However, I'm not sure of the effect of the H basis functions. Moreover, I'm too thick to be able to convince myself of the correct units for the field and so on (in general all the stuff is in atomic unit - distances in Angstrom). 2. Is there a way to use simple bare point charges or to "switch on" an E-field ? Any help much appreciated! Patrick The input I've been trying to use is attached. -- -------------------------------------------------------------- | Dr Patrick Jemmer, | http://tcpc.bham.ac.uk/~paddy | | Physical & Theoretical | e-mail: padz@joule.pcl.ox.ac.uk | | Chemistry Laboratory, | tel: +44-1865-2-75161 (work) | | South Parks Road, | fax: +44-1865-2-75410 | | Oxford OX1 3QZ | http://joule.pcl.ox.ac.uk/ (PTCL)| -------------------------------------------------------------- --------------15FB59E21CFB Content-Type: text/plain; charset=us-ascii; name="fm_ion_ff.d12" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="fm_ion_ff.d12" FM_ION - F- ION MOLECULE 1 3 1 0. 0. -50.0 9 0. 0. 0. 101 0. 0. 50.0 END 1 1 0 0 1 0. 1. 1000.0 1.0 101 1 0 0 1 2. 1. 1000.0 1.0 9 4 0 0 7 2. 1. 13770. 0.000877 1590.0 0.00915 326.5 0.0486 91.66 0.1691 30.46 0.3708 11.50 0.41649 4.76 0.1306 0 1 3 8. 1. 19.000 -0.1094 0.1244 4.530 -0.1289 0.5323 1.387 1.0 1.0 0 1 1 0. 1. 0.437 1. 1. 0 1 1 0. 1.0 0.147 1. 1. 99 0 END TOLINTEG 20 20 20 20 20 END MAXCYCLE 400 TOLSCF 9 8 END --------------15FB59E21CFB--Return to Top
Subject: Re: plays on science
From: lrmead@whale.st.usm.edu (Lawrence R. Mead)
Date: 14 Jan 1997 17:15:53 GMT
Bob Michaelson (rmichael@nwu.edu) wrote: : In article <5be4n2$de8_001@library.nwu.edu>, : rmichael@nwu.edu (Bob Michaelson) wrote: : >In article <32d8371a.0@cfanews.harvard.edu>, : > trothman@cfa0.harvard.edu (Tony Rothman) wrote: : >>I am searching for some plays on science, : >>excluding the usual suspects: Brecht, Durenmatt, : >>Capek. Any leads appreciated. : >>trothman@pppl.gov : >> : >Some of Tom Stoppard's recent plays (e.g. "Arcadia") may qualify. : > : >Bob Michaelson : >rmichael@nwu.edu : : And, I forgot, "Breaking the Code" by Hugh Whitemore, about Alan Turing. : : Bob Michaelson : rmichael@nwu.edu The most dramatic I ever saw was " Inherit the Wind " , adapted for film starring Spencer Tracy. The Scopes "monkey" trial. -- Lawrence R. Mead (lrmead@whale.st.usm.edu) ESCHEW OBFUSCATION ! ESPOUSE ELUCIDATION ! http://www-dept.usm.edu/~scitech/phy/mead.htmlReturn to Top
Subject: Re: to keep an ice cube from melting
From: lrmead@whale.st.usm.edu (Lawrence R. Mead)
Date: 14 Jan 1997 17:17:06 GMT
ben (bensayo@ibm.net) wrote: : Hi people, : : My name is Ben, and I have a friend in elementary school who : needs some help for a science project. Using materials available around : the home, she must keep a single regular-sized ice-cube from melting for : 5 hours. Nothing commercial such as igloo ice packs, or iceboxes are : permitted. : She's tried stuff like saran wrap, styrofoam bowls and wood : chips, but the cube is completely melted by the end of the 5 hours. : If anyone has any tips or suggestions, they would be greatly : appreciated. : : Thanks in advance :) : bensayo@ibm.net Try paper - great insulator. -- Lawrence R. Mead (lrmead@whale.st.usm.edu) ESCHEW OBFUSCATION ! ESPOUSE ELUCIDATION ! http://www-dept.usm.edu/~scitech/phy/mead.htmlReturn to Top
Subject: Re: Mars Rock Crock!
From: Wil Milan
Date: 14 Jan 1997 10:15:03 -0700
> You need a reference here. A charitable reaction to a failure to > produce one would be to call you a misguided fool. Egad, folks, can we turn down the flame temperature around here? Can we not disagree and question without waving cocked pistols and hurling verbal spears? I don't mean to single out the comment above, for there have been many such in this discussion. I'm just pleading for a little civility. It would benefit us all, I think. Wil MilanReturn to Top
Subject: Re: Neutrinos
From: "Lindblad"
Date: 14 Jan 1997 11:54:23 -0800
Esben Andresen, LundeReturn to Topwrote: <32D28498.7ED5@post3.tele.dk>... [unnecessary quoted text deleted by moderator of s.p.r.] > 1. I don't understand how the neutrinos can make electrons move faster > than light. Light has its largest velocity in vacuum, but the speed decreases in more solid material (for example glass or water) So it's possible that an electron can move faster than light (observe that in this case it's the speed of light in the solider material we talk about) in solider materials, i've read that neutrinodetecors consists of large tanks filled with some fluid (which, of course, are solider than vacuum :), therefore we can assume that an electron which have been hit by an neutrino can travel faster than the lights speed in the actual material. Study your science magazine and check if they didn't mean "Faster than the light speed in the fluid", Friendly greetings Andréas Lindblad
Subject: Re: Help me with Newton's law F=ma
From: mfein@aplcomm.jhuapl.edu (Matt Feinstein)
Date: Tue, 14 Jan 1997 17:37:04 GMT
orie0064@sable.ox.ac.uk wrote: >I think F=ma is not so much a law as a definition. >The real laws of newton were that: > >1) If a body is not disturbed, it will stay where it is or move forever >with constant velocity > >2) The conservation of momentum: that every body has a quantity called >mass, such that in every collision, > >m1v1+m2v2 will stay constant throughtout. > >From 2) one can define momentum & hence force. >-- >GT >-- >http://users.ox.ac.uk/~orie0064 No, no, no. This may get me into an argument. but-- F = ma is -not- a definition of force. It is -not- an identtity, it is a -law of motion-. It is a second-order differential equation that relates the motion (i.e., kinematics) of a particle to the force (i.e., dynamics) acting on the particle. In fact, force is, from the standpoint of logic-and-axiomatics, an undefined concept in classical mechanics. This is not to say that we don't know what force is; there are a variety of classical 'force laws' such as the elementary laws of gravitational force and the electromagnetic Lorentz force, the not-so-elementary force laws for frictional, pressure, and viscous forces, as well as (my favorite) the fictional coriolis force. Matt Feinstein mfein@aplcomm.jhuapl.eduReturn to Top
Subject: Re: twin paradox
From: Erik Max Francis
Date: Tue, 14 Jan 1997 09:17:01 -0800
Ken Fischer wrote: > I don't usually do math, but this seems odd, I would > expect velocity to remain constant (considering a massless > cable). You mean you don't understand that a constant acceleration leads to an increasing velocity? -- Erik Max Francis | max@alcyone.com Alcyone Systems | http://www.alcyone.com/max/ San Jose, California | 37 20 07 N 121 53 38 W &tSftDotIotE; | R^4: the 4th R is respect "You must surely know if man made heaven | Then made made hell"Return to Top
Subject: Re: Mars Rock Crock!
From: Wil Milan
Date: 14 Jan 1997 11:06:06 -0700
Michael Edelman wrote: > > I spent more than a few years in psychology; I have an MA, and would have > had a PhD if I hadn't gotten tired of living in poverty ;-) > > That aside, let's not confuse the tool with its use. IQ tests were > conceived by Binet as a tool for identifying students with deficits that > needed addressing in certain areas. When used like this, IQ tests are valuable > diagnostic tools. The problem is in the misuse and misinterpretation > of the tools. Even so, most criticisms of The Bell Curve are way > off, and miss the real faults of argument, apparantly as most critics haven't > read the book! > > There are many tests that claim to measure a construct called IQ. Some > are very repeatable. Verifiable? Not a meaningful claim. We don't > have a seperate measure and criterion. The measure *is* the criterion. > > And Psychology is not a one-dimensional field with a single theory. What > we call Psychology encompasses a lot of areas and a lot of theoretical > models. Some theories of psychology have excellent predictive power. Some > are speculative. It's a big field, and there are probably 1000 or more > times as many people working under the rubric "Psychologist" as "Astronomer" You explained what I meant better than I did. I agree completely. Wil MilanReturn to Top
Subject: Re: Astrology: statistically proven now!
From: paddy.spencer@parallax.co.uk (Paddy Spencer)
Date: Tue, 14 Jan 1997 17:04:08 GMT
David SchaafsmaReturn to Topwrote: >lbsys@aol.com wrote: > >evidence is not enough to prove that astrology has a real scientific >basis. I have always understood astrology to include things like the >influence of the planets on people's psychological makeup. This has probably been said many times before, but are you aware that quantum mechanics and cosmology _demand_ that astrology, meaning the effects of the planets on the lives of humans, is a genuine effect? Viz: the Copenhagen interpretation states that once two quantum mechanical particles have interacted, they form a single quantum system for ever after, with (apparent) FTL signalling and so on (cf. woolly EPR explanations by bewildered QM exponents) which includes instantaneous effects on parts of the system by other parts which may be physically separated by large distances. (Hands up if you can see where this is leading yet...) Furthermore, as matter/energy cannot be created nor destroyed (barring uncertainty relations, pair production and the like), only changed in its state, all matter currently in existence must have been present in the Big Bang and subsequent expansion. As all matter in the universe was once crammed into a space smaller than the Planck length, all matter in the universe has interacted quantum mechanically with all other matter in the universe and so the whole shebang is one large interacting quantum system. Which means that the collections of atoms that form the planets have a very definite quantum mechanical effect on the collections of atoms that form people. Food for thought... hope you don't choke on it! -- Paddy Spencer Parallax Solutions Ltd (http://www.parallax.co.uk/) "A (pseudo)random number generator is much like sex: when it's good it's wonderful, and when it's bad it's still pretty good." -- G. Marsaglia
Subject: Re: THE WORLD OF CHEMISTRY; 2nd law of thermodynamics a fake
From: "Rebecca M. Chamberlin"
Date: Tue, 14 Jan 1997 12:17:09 +0000
Archimedes Plutonium wrote: > > This is not the first time I have posted my misgivings of the 2nd > law. In an Atom Totality theory, the 2nd law is a fakery because it > cannot explain the 100% uranium block creating atoms of neptunium and > plutonium. But the 2nd law is correct for the most part because it is a > law that bespeaks of the process of radioactive decay, that most > radioactivity is one of decay and not of growth. Here a gedanken > experiment would suffice. If the entire universe were just a block of > 100% pure uranium, and if the 2nd law were true, then there would not > exist neptunium or plutonium atoms. Yeah, whatever. Absorption of a neutron by U-238 leads to two beta decays to form Pu-239. One particle in, two particles out. Hmmmm....sounds like entropy is increasing. BTW the neutron could come from the spontaneous fission of U-238 (a minor, but non-zero probability event).Return to Top
Subject: PH.D.s are useless
From: varange@crl.com (Troy Varange)
Date: 14 Jan 1997 09:02:05 -0800
> > > Oh, the joys of American anti-intellectualism. It's been part of > > > American culture that the "common man", with little training but American culture and every other European culture. > > > wads of common sense, will go further than someone with advanced > > > training. While this _might_ have been slightly true back when > > > we were mostly farmers, it certainly doesn't hold in an advanced > > > industrial society. > > Yes it does. > > > Microsoft Bill Gates didn't have a degree did he? > > A person who seeks to aquire a PH.D. has that motivation. > For people who aspire wealth, a PH.D. is not necessary. > One has to have the motivation to take big risks in starting > their own business. Most people I know that are on their > second majors in college are blindly following the path > laid before them by their parents'. Go to college, get a > PH.D. and you will be successful!! But those who aspire > to be self employed have the guts to risk, suffer failure, > and end up successful enough to hire degree holders to be > their lawyers, accountants, financial advisers......get > the picture?? It was infinitly easier to go to college > and get good grades, But it did not compare to the stress, > risk, and enormous amount of motiviation required to start > a small business! Only 0.1% of the American populace holds PHDs; what proof is there that they are intellectually superior to the commoners? When you consider what horrors PHD bearers have inflicted on society, can the good people be blamed for desiring leaders that are free of PHDs? -- Cheers!Return to Top
Subject: Re: PH.D.s are useless
From: salem@pangea.Stanford.EDU (Bruce Salem)
Date: 14 Jan 1997 18:36:43 GMT
In article <32DB1BC2.639F@concentric.net>, >A person who seeks to aquire a PH.D. has that motivation. For people >who aspire wealth, a PH.D. is not necessary. One has to have the >motivation to take big risks in starting their own business. Most >people I know that are on their second majors in college are blindly >following the path laid before them by their parents'. Go to college, >get a PH.D. and you will be successful!! I think that much of the new wealth in current growth areas of the economy wouldn't exist were it now for PhDs, the academic system and govermental support of R&D.; Technologies like OOP, The Internet, and GUI interfacing would not have existed if they were to be developed solely on the short-term thinking of the average businessman in a large or small company. All of these technologies had to be pioneered first by eggheads in research environments protected from the whims of the market, quarterly reports or investors. Much of what is successful business is on the heels of proven technologies. The U.S. needs to be a leader in new technology development to remain competative in world markets. This absolutely depends on a strong academic and govermnet funded R&D; institutions. We cannot depend on private companies to take the risks associated with long-term technology development for which they are risk adverse. > But those who aspire to be >self employed have the guts to risk, suffer failure, and end up >successful enough to hire degree holders to be their lawyers, >accountants, financial advisers......get the picture?? Yes, I get the picture, companies have discovered a way to push risk out the door in the guize of "opportunity" for outsourced skills. Individuals are being turned into entrapaneurs whether they want to or not. This is the main impact of computers and high-tech on the labor market. It allows large organizations to slim down, reap the benefits of their position while reducing labor costs and risk. This is a revolutionary change that will have grave political and social consequences, I think. People are discovering that the private sector not only doesn't make promises, or can't keep any that it may have made in the past, but that it depreciates their skills and worth. They will react badly when the realization hits of who really benefited from the massive changes taking place. It wasn't the majority of people. The income distribution changes in the U.S. in the past 20 years is evidance that so-called free market economics benefited a small minority and that it leads to winner-take-all processes that disadvantage many more then it benefits. It is the power of timly access to information and the flow of information that causes this. Bruce Salem -- !! Just my opinions, maybe not those of my sponsor. !!Return to Top
Subject: Re: twin paradox
From: bonus@algonet.se (Bjorn Danielsson)
Date: Tue, 14 Jan 1997 19:37:52 +0100
Ken FischerReturn to Topwrote: (snip) > My opinion is that acceleration does one thing, > acceleration changes velocity, and that is the definition > of acceleration = "rate of change of velocity". > But how can different velocities cause different > time flows (seconds being longer with greater velocity)? I think it depends on how you define "time", or rather how you define the rate of time flow. My favourite example is a clock made out of a flashlight, a mirror, and a photodetector: / | Flashlight | | \ | | Mirror ] | Photodetector ] | ] | <------- distance "d" ------> The flashlight sends out a light pulse, and a clock tick is defined by when the light comes back to the photodetector. The clock period is 2d/c since 2d is the distance travelled by the light. (d is much larger than the distance between flashlight and detector) If we watch another similar clock that is moving with speed "v" in a direction perpendicular to the line that defines the distance "d", we will see the light pulse moving in a zig-zag fashion. In that clock the total distance travelled by the light pulse will be longer than 2d. Therefore the clock period will be longer too. Using Pythagoras theorem and simplifying, we get (2d/c)/sqrt(1-v^2/c^2). If all physical processes are affected by motion the same way as this simple clock, then time itself will seem to have slowed down as seen from an outside observer. But within the rest frame of the clock, no slowing down of anything or any other special effects are noticed. This is the "transversal" relativity effect. The "longitudinal" effect can be shown in the same way, but with motion in the direction of the beam of light. The longitudinal effect causes length contraction and disagreement on the synchronization of clocks along the longitudinal axis. To see how the original clock slows down as observed from the second clock, we need to take both the transversal and the longitudinal effects into account. Then the whole situation becomes symmetric, and this is why it is impossible to claim that one observer's definition of time or space is more "real" than another's. Well, that's my view of things. Followups to sci.physics.relativity. -- Bjorn Danielsson http://www.algonet.se/~bonus
Subject: Re: PH.D.s are useless
From: wpenrose@interaccess.com (William R. Penrose)
Date: Tue, 14 Jan 1997 11:55:27
In article <32DB1BC2.639F@concentric.net> AprilReturn to Topwrites: >> >> In article <5bdu4f$agl@interport.net> >> cjc@interport.net (Cheng-Jih Chen) writes: >> >> > >> > Oh, the joys of American anti-intellectualism. It's been part of >> > American culture that the "common man", with little training but >> > wads of common sense, will go further than someone with advanced >> > training. While this _might_ have been slightly true back when >> > we were mostly farmers, it certainly doesn't hold in an advanced >> > industrial society. Not true at all! The opportunities for the non-degreed person are greater today than they ever were. When we were mostly farmers, generally we had to stay farmers, because opportunities for education or intellectual broadening were limited. There are countless examples of people with minimal or intermediate education doing very well in business. Pursuing a PhD and becoming a businessperson are two different life tracks, with many failures and a few successes in each. They're not mutually exclusive, either. Some heavily-degreed types do well in business. A businessman is unlikely to cross over and become a scientist, mostly because science is more structured. You have to have that degree and put in your time before you can 'make it' in science. The business world is wide open, and anyone with native intelligence and guts (and a little luck) can succeed. >What I am saying is that before you bemoan "anti-intellectualism" of the >"comman man" who runs his own business, try it yourself and see if it is >an easy experience. It would seem that the "comman man" is quite >unique! >April ******************************************************** Bill Penrose, President, Custom Sensor Solutions, Inc. 526 West Franklin Avenue, Naperville, IL 60540 630-548-3548, fax: 630-369-9618 email wpenrose@interaccess.com ********************************************************
Subject: Re: Utter Futility of Arguing With Creationists
From: ray@scribbledyne.com (Ray Heinrich)
Date: Tue, 14 Jan 97 20:29:48 GMT
In articleReturn to Top, Eric Burgh wrote: >On Fri, 10 Jan 1997 will.lorimer@gpo.canada.cdev.com wrote: > >> But science is NOT a religion. Science is independent of your >> religion. The laws of physics apply regardless of whether you believe >> in them; the law of gravity will cause Christians to fall at the same >> rate as atheists; > >How do you know this? > in the only study i've read on this subject, it was found (among a not-so-randomly selected population of skydivers) that atheists did seem to fall a few tenths of a percent faster than christians. this is probably due to the atheist's narrower cross-section, but all this awaits further study. -ray >> water will boil at the same temperature in a Buddhist temple as it will >> in a Muslim kitchen. > >How do you know this? in this case, there is much documented evidence that the average boiling point of water in Buddhist temples is much lower than the average boiling point in Muslim kitchens. of course these results are now questionable, as most of the studies were done before the chinese invaded Tibet. -ray what did you expect? write to me: ray@scribbledyne.com see my website: http://www.vais.net/~heinrich/wb/ see my dog: http://www.vais.net/~heinrich/wb/t-smllc.jpg and love me: xx xy and my dog as well (and all this stuff is copyright 1997 by the free state of dogs and ray heinrich) sorry, i left that out by mistake
Subject: Re: Mars Rock Crock!
From: daveg@halcyon.com (David B. Greene)
Date: Tue, 14 Jan 1997 20:01:19 GMT
potts@cms5.cern.ch says... >On Mon, 13 Jan 1997, angus wrote: >> > > Well, you may work for CERN and hence glow in the dark, but that isn't >> > > everyone's experience. >> > > >> > You don't actually understand what is done at CERN, do you? > >> Obviously cultivate a "snotty then thou" attitude". >> >That makes no sense. Would you care to try typing it again so it can >actually be construed as an insult, rather than some unconnected words put >next to each other. > >If someone suggests that working at CERN is going to cause me to have a >higher than normal content of radioactive substances, then they clearly do >not understand what we do there. > >Anthony Potts >CERN, Geneva OK, Anthony, we know exactly what you do at CERN and it is no use trying to hide it! You make the American based scientific establishment glow green with envy, dammit! David B. GreeneReturn to Top
Subject: Re: twin paradox
From: bonus@algonet.se (Bjorn Danielsson)
Date: Tue, 14 Jan 1997 19:33:59 +0100
Lord of the FliesReturn to Topwrote: > Well Ken, the answer about the acceleration is both. Both acceleration > and velocity cause time dilation. For acceleration, the time dilation will > change with time. It is the acceleration which resolves the problem of the > twin paradox. This is well documented as it is considered a very good > relativity problem. The acceleration field produced by the rocket's turnaround is not a physical explanation of the twin paradox. The acceleration field, as seen from the rocket, will produce lots of strange effects including the effect of immediately changing the velocities of large galaxies far away, by just turning a knob in the rocket's control panel. A better explanation is found by analyzing the rocket's motion from an inertial frame. It doesn't matter which inertial frame. If we look at both twins as they move from event "1" to event "2", where event "1" is where they take separate paths, and event "2" is where they meet again, it can be shown that for the twin in the rocket, some part of his path between the events will always be time-dilated to a greater extent than any time dilation for the other twin. That acceleration in itself does not explain the twin paradox can be understood if we let the "earth" twin sit in another rocket ship which accelerates back and forth between the earth and moon all the time, without ever reaching a speed of more than 100 km/s or so. The twin in the starship on the other hand, may spend only a fraction of the trip in accelerated motion, and he will still be the one that has aged the lesser amount when the twins meet again. The only explanation that acceleration provides is that acceleration is what causes both the velocity increase and change in the direction of motion that lets the twins meet again. But we get exactly the same effects by using three inertial frames that synchronize their clocks pairwise at three different events (departure, turnaround, and return), with no acceleration occurring anywhere. Followups to sci.physics.relativity. -- Bjorn Danielsson http://www.algonet.se/~bonus
Subject: Re: Condemnation of Atonality
From: Alan Swindells
Date: Mon, 13 Jan 1997 20:33:48 GMT
In article <32D986FF.3377@Prodigy.Net>, crjclarkReturn to Topwrote: [RANT] > > Craig Clark > My, we /are/ angry, aren't we? -- Regards: Alan * alan.ags@argonet.co.uk * 'Life! Don't talk to me about life!' Marvin the Paranoid Android
Subject: Re: Vietmath War: If US had been parliamentary, no Vietnam war?
From: Alison Brooks
Date: Tue, 14 Jan 1997 07:23:39 +0000
In article <5bc184$q32$1@dartvax.dartmouth.edu>, Archimedes PlutoniumReturn to Topwrites > If the US had been a parliamentary form of government where all >politicians are elected and not these cabinets that linger from one >administration to another and really run the government. Then, >hypothetically, is it highly likely that the Vietnam War would have >never occurred? Or if it had, would not a parliamentary form of >government gotten the US out quicker? One can argue that the US Vietnam >War was chiefly the result of foolish advisors to the president. > Interestingly enough, while the US was busy getting bogged down in Vietnam, the UK was engaged in fighting in Borneo, in remarkably similar political situations. The UK military position wasn't as good as that of the US; the Borneo border was massively longer than that which the Americans had to deal with, and the terrain very much harder. Nonetheless, the UK was successful. One can debate why this should be; however, there was no great "anti- war" debate in the UK. I suspect that this was in part because of different attitudes. > Perhaps this is a great research inquiry as to see which form of >democracy is superior-- the US or the UK parliamentary. > > In a parliamentary system, the likelihood of foolish advisors doing >so much damage is minimized, I suspect. > If only. You don't live in Britain, do you? > Same thing in mathematics, where math is run by the old geezers who >control the math journals. They print and publish the pipsqueak little >progress. And they do their utmost best to keep out anything that is >big, new and exciting and important. In fact, they mostly publish that >which furthers their own self interests or >you-rub-my-hand-I-rub-your-hand. > > The clowns that got the US into Vietnam are the same sort of >intellectual clowns that control the mathematics publishing journals >and who hate an idea such as Naturals = P-adics = Infinite Integers. Ah, paranoia. Isn't it wonderful. -- Alison Brooks O-
Subject: Re: "FORBIDDEN SCIENCE," excellent anti-skept book!
From: Keith Holden
Date: Tue, 14 Jan 1997 10:58:40 -0800
Ron Wormus wrote: > > For a present day eample of opposition to the accepted wisdom take a look at these files: > > http://www.europa.com/^rsc/physics/B3/evans > > ___RonIs there an error in the URL? I get a not found error message. kahReturn to Top
Subject: Re: Hypothetical Universal Theory
From: mirza borogovac
Date: Tue, 14 Jan 1997 14:09:33 -0500
> >and the contraction will continue until all the matter is a at a > >single point. Sounds like this universe. > > This is asuming the explosion doesn't give the matter escape velocity. > I em not shore that there is an escape velocity from entire universe. I know that there are escape velocities for celestial bodies, but universe is just not the same thing. Sence universe is only thing that exists, is is concivable that gravitational decelartoin of the universe will alvays act on the matter in the universe thus producing the orbital motion of all the matter in the universe about the comon center of the gravity.Return to Top
Subject: Re: Condemnation of Atonality
From: Phil Cope
Date: Tue, 14 Jan 1997 16:14:51 +0000
crjclark wrote: > Good music bases 99% of its melodies on major and minor scales, Greek > modes and their derivatives, pentatonic or any formal scheme of scale > based on intervals other than seconds. Harmonies must essentially be > derived from major and minor triads, or superimposed seconds, which > when inverted become 7ths. There are only 3rds, 6ths, 2nds, 7ths, > and ultimately a 4th and 5th is a stacked 3rd or 2nd, so by all > rights there are only 2nd and 3rds stacked upon each other. So your model of good music consists of harmonies that are derived fron 2nd's, 3rd's, 4th's, 5th's, 6th's and 7ths, I trust that the omission of the octave and compound intervals was an oversight on your part. Given this, perhaps you could tell us which intervals Schonberg uses in his double plus un-good** music. Phil Cope ** use of 'Newspeak' (1984 - George Orwell) intentional here -- All opinions expressed in this message are purely personal and do not reflect the opinions or policies of SmallworldwideReturn to Top
Subject: Re: Vietmath War: If US had been parliamentary, no Vietnam war?
From: Dave Barry
Date: 14 Jan 1997 18:53:27 GMT
Archimedes.Plutonium@dartmouth.edu (Archimedes Plutonium) wrote: > If the US had been a parliamentary form of government where all >politicians are elected and not these cabinets that linger from one >administration to another and really run the government. Then, >hypothetically, is it highly likely that the Vietnam War would have >never occurred? Or if it had, would not a parliamentary form of >government gotten the US out quicker? One can argue that the US Vietnam >War was chiefly the result of foolish advisors to the president. > > Perhaps this is a great research inquiry as to see which form of >democracy is superior-- the US or the UK parliamentary. > > In a parliamentary system, the likelihood of foolish advisors doing >so much damage is minimized, I suspect. > While I would be the first to argue that there are serious problems with what passes for a democratic system of government in the US, I would have to point out that while it is true that the entire government in the UK changes on a fairly regular basis, much of the UK's foriegn policy is dictated by career diplomats. Unlike the US system where, as I understand it, the President can appoint anybody to be an ambassador, all diplomats in the UK are civil servants, who have actually received training for the job that they do. Ambassadors especially would have had many years of experience before reaching their posts. Although the government has some influence in who gets promoted and who doesn't, there are no such things as political appointees. John Major (or Tony Blair if you are reading this a week or two from now ;) ) cannot say that he wants X random person from outside the service to be ambassador to Mongolia. He can choose one person from a list of suitable people, but thats about it. The point I'm trying to make is that the civil service is far more powerful in the UK than in the US, and this leads to a certain amount of stability/stagnation from government to government, particularly in foreign affairs and trade relations (if indeed there is a distinction between the two), and this compensates for the more frequent change at the helm, so to speak. In a parlimentry democracy, there seems to be a need for a conservative civil service to keep the whole show on the road from year to year; the politicians do all the talking and the civil servants really run the country. Although it can be argued that the Vietnam conflict was prolonged by bad advice, where did this advice come from. Was it from ambassadors and civil servants, or was it from the military/industrial complex as Mr. Stone would argue? If the later is the case would a parlimentry system really have made a difference? As for comparing the two systems, the US is not a true democracy. Because of the Electoral College system, the President is not actually elected by the citizens themselves. The electoral college of a state votes for the President based on the recomendations of the people of the state, but that can by no means be called one person, one vote. A citizen votes to mandate a representative to vote a certain way, but that citizen doesn't directly vote to put the president in the White House. CNN also has alot to answer for, while people in the West Coast and Alaska and Hawaii are still voting, CNN was announcing results from the East Coast and declaring an outcome, which obviously discouraged voters in the West from going to the poles. In the UK and here in Ireland, no results can be announced until all polling stations have closed (yes even though we are very small, outlying islands vote on different days). Yes there are exit polls conducted, but these only give an indication, not a result. But I digress, 'cause CNN wouldn't have been a major factor in the Vietnam conflict. The UK system of Parlimentry Democracy isn't all that democratic either, based on a 'first past the post' system. Each constituancy has but one represntative, and the person with the most votes wins. This means that even if the majority of voters voted against a candidate, they can still be elected if they get more votes than anyone else individually. It is therefore almost impossible for candidates from the smaler parties, the Greens, the Liberals, Natural Law or Monster Raving Looney Party, to ever get anyone elected. It also has a detrimental effect on candidates running as individuals, rather than on a party ticket. Here in Ireland, as in other true democracies ;) we operate on a Proportional Representation system. This works by having more than one Representative per constituancy, usually between 3 and 5. The total valid poll is calculated and a quota is tallied, I think its 50% +1, but I'm not sure. When voting, people vote for the candidates in order of prefernce, for example, Bill Clinton first, Ross Perot second and Bob Dole third. They then tally all the first prefernces. If anybody has reached the magical 50%+1 quota on the first count, they are elected. What happens then is the distribution of their surplus. All their second preferences are given a certain value, and added onto the results from the first round of those who still remain. This goes on until all the vacancies have been filled. If no-one reaches the quota during any given round, they eliminate the person with the lowest tally, and distribute their other prefrences between the remaining candidates. Yes, it is a complicated system, and counts usually go on well into the night and next day, particularly if, as they usually do, an eliminated candidate asks for a recount. What this does mean, however, is that there are a wide range of people elecetd from many different parties, or none at all, and the Dail, our parliment, is actually representative of the way people actually voted. Yes this means that Coalition Governments are the norm, but this means that the views of the majority of the population are actually reprented in Government. At the moment our Government is a coalition of three parties, centre-right, centre-left, and left, the last government was right and centre-left. Mix and match is the name of the game. But back to the point, a UK style parlimentry government would not, in my opinion, have finished in Vietnam any earlier than the US did in OTL, however, a parlimentry government based upon a PR electoral system would have, as it would have been more representative of the views of the people and would have represented the strong anti-war movement prevelant at the time, rather than the intrests of the military/industrial complex. Just my 2.3 Euros worth DaveReturn to Top
Subject: Re: to keep an ice cube from melting
From: Fred McGalliard
Date: Tue, 14 Jan 1997 15:32:06 GMT
ben wrote: > > Hi people, > > My name is Ben, and I have a friend in elementary school who > needs some help for a science project. Using materials available around > the home, she must keep a single regular-sized ice-cube from melting for > 5 hours. Nothing commercial such as igloo ice packs, or iceboxes are > permitted. I would suggest you try a milk bottle and some nice chemical process to evacuate it, creating a vacuum flask. The ice cube could keep nicely inside a modest vacuum if it is wrapped so it can't evaporate. I assume that you will need to displace the air with something first. I know that you can get a pretty good vacuum with steam, but obviously you would then have to let it cool before you could store the ice in it. I think a good epoxy glue would seal OK for a few hours. You don't really need a hard vacuum to get the insulation value up where you need it. Oh, BTW, you could just cheat up a storm. Put it in some styrafoam inside a bottle inside a container of ice and salt. This would tend to freeze it up. Could also pull a vacuum on water untill it starts to freeze, then your ice will keep nicely. Also, as I recall, there are a couple of chemicals that are strongly endothermic and could be mixed to make a freezing mixture for you.Return to Top
Subject: Re: twin paradox
From: Leo Van Dromme
Date: Tue, 14 Jan 1997 18:30:24 GMT
hello i wrote a page on light speed. it might interest you; the url is: http://www.esat.kuleuven.ac.be/~croes/vdromme/light.speed.html regards from leoReturn to Top
Subject: Re: twin paradox
From: Leo Van Dromme
Date: Tue, 14 Jan 1997 18:24:19 GMT
hello i wrote a page on light speed. it might interest you; the url is: http://www.esat.kuleuven.ac.be/~croes/vdromme/light.speed.html regards from leoReturn to Top
Subject: Re: twin paradox
From: Leo Van Dromme
Date: Tue, 14 Jan 1997 18:26:06 GMT
hello i wrote a page on light speed. it might interest you; the url is: http://www.esat.kuleuven.ac.be/~croes/vdromme/light.speed.html regards from leoReturn to Top
Subject: Re: [QUESTION] Why negative ground?
From: alexicon@ziplink.net (Andrew Davis)
Date: Tue, 14 Jan 1997 16:51:59 GMT
Too bad ol' Benjamin Franklin got it wrong when he decided to to designate the glass rod positive + and the piece of amber negative -. Electrons should be the (+), as they do the 'work'... This has screwed up EE's for centuries.....!!Return to Top
Subject: Re: faster than light travel
From: nrt@ast.cam.ac.uk (Nial Tanvir)
Date: 14 Jan 1997 22:06:53 GMT
In article <32DB7583.6148@lsl.co.uk>, Ewen CharltonReturn to Topwrites: >Dean Povey wrote: >> >> Jos Dingjan writes: >> >> >I vaguely remember seeing some program about this on the tube. They sent >> >Mozarts x'th FTL (or so they claimed). It had a certain vinyl-quality >> >(nothing like that crisp CD sound) but you could still recognise it. Now >> >if I only could remember the program... >> >> >> A discussion of the "tunnelling" phenomena which gives rise to this FTL >> phenomena is given at http://lal.cs.byu.edu/ketav/issue_3.2/Lumin/lumin.html. >> > >I just looked at the above site, and in it it is argued that the bar of >Mozart was only able to go FTL because it was a smoothly varying pulse. >Unfortunately I didn't see the program, and didn't hear the quality of >the transmission, but if the bar of Mozart had had some speech >overdubbed, would this speech have been recognisable after transmission? >And if so, wouldn't this constitute a 'signal'? I think that either music or speach is an equally good signal. However, I seem to recall an "explanation" of this experiment to the effect that the receiver is actually extrapolating the signal in some way, thus giving the impression of faster than light travel. Given the tiny time delay, the music still sounds reasonable.
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