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"Robert Imrie, DVM"Return to Topwrote: >~Word Warrior~ wrote: >> "Robert Imrie, DVM" wrote: >>Word Warrior wrote: >> >> People properly nourished in clean surroundings won't >> >> get cancer at all. >> > I sincerely hope this is a joke, because there's not the tiniest bit of >> > evidence to suggest it is true. >> That's not quite the case. >Actually, it is the case -- but don't take my word for it. I could ask somebody from Love Canal, for example. >> > And there's a mountain of evidence indicating it's false. >> Specify. Go ahead and cite an example. >Sorry. Substantiation unspecified. > You're going to have to do your homework for yourself. I have, which is why I mention contaminants and the inability of the body to cleanse itself of them adequately as causes of abnormal cell growths. > I will, >however, point you in the right direction. If you've got a solid >background in biology, biochemistry, and genetics, as well as well as a >good medical dictionary and access to a medical library, you might try >looking in any basic oncology text. Even some under-grad genetics texts >discuss the fundamentals of neoplastic transformation and oncogenesis. >Many basic virology and toxicology texts deal with these issues as well. Your point remains unsubstantiated. Nowhere in such literature does anyone attempt to claim that pollution can't be at least among the causes of such disease processes, much less actually offer evidence of such. >If you don't have a very strong background in the areas I mentioned, >your best bet would probably be to ask an M.D, a veterinarian, or some >other science-based medical practitioner to discuss the issue with you. I've already discussed it with a former department chair of a university medical school, which is why I quoted what I did. >Of course, if you know any geneticists, biologists, or biochemists, they >would do quite nicely as well. You might learn a lot by asking various >"alternative" practitioners the same questions, but I advise against it >-- because most of what you learn is liable to be incorrect. ;-) Your advice remains without substantiation. >> So can =you= prove the stupid rock came from Mars? >Nope. Can't prove it at all. However, having read a summary of the >analysis to which it was subjected, I think its Martian origins have >been established with reasonable certainty. Specify. >Good luck, There is no such thing as luck. _____________________________________________________________________________ |Respectfully, Sheila ~~~Word Warrior~~~ green@pipeline.com| |Obligatory tribute to the founding fathers of the United States of America:| | This is not to be read by anyone under 18 years of age, who should read up| | on history and the First Amendment to the Constitution, as an alternative.| | *Animals, including humans, fart, piss, shit, masturbate, fuck and abort.*| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
"James S. Lovejoy"Return to Topwrote: >This is word warrior who doesn't *need* the tiniest bit of evidence to >make her pronouncements. Inaccurate/inapplicable; fallacious regardless. So you figure it's from Mars, too, no doubt, and would have stated it had you not in your haste to indulge fallacy forgotten to do so. _____________________________________________________________________________ |Respectfully, Sheila ~~~Word Warrior~~~ green@pipeline.com| |Obligatory tribute to the founding fathers of the United States of America:| | This is not to be read by anyone under 18 years of age, who should read up| | on history and the First Amendment to the Constitution, as an alternative.| | *Animals, including humans, fart, piss, shit, masturbate, fuck and abort.*| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Peyton Sherwood wrote: > > This should be a simple one for you physicists.. > I need a formula that will graph the position of a projectile object > over time, given its angle and initial velocity of projection... > > the variable should be time, so basically I end up with a graph that > shows the path of the ball (assume no air resistance.. its ok..) > > if you MUST have the object mass and other stuff email me but I'm > looking for a fairly simple answer.. I gather you don't have a first year text around anywhere. For the horizontal motion, x = xo + v_h * t where xo = initial position and v_h is the horizontal speed For the vertical motion, y = yo + v_v - 1/2 * g * t^2 Given the intial speed v and angle of elevation theta v_h = v * cos(theta) v_v = v * sin(theta) |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++| | Doug Craigen | | | | Looking for words of wisdom by a Physicist? | | http://www.cyberspc.mb.ca/~dcc/phys/quotes.html | |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++|Return to Top
In article <01bbfce0$5eed3b60$ee26efa8@jblood> "Lord of the Flies"Return to Topwrites: >> >Absolutes are ideals that do not really exist. >> >> 1 + 1 = 2 absolutely, really. >> >Thank you, that was a good snap!!! Absolutes can exist if we define them >as possible. Just as he mentions 1 + 1 = 2, we say this is absolutely >correct because we define it to be! (remember that math is a language of >logic, therefor the above statement is "true" because we define anything >derive via logic as "true" or absolute) >IN the end, what is absolute and not absolute will depend on our >assumptions. Ask a bible pumper if God is absolute! Einstein assumes as >part of his theory that c is absolute. Is he right? that is something >experimentalist are striving to disprove (they of course want to disprove >everything! :) ) I have tried to explain, you have ignored this part of my posting. c is absolute because 1m and 1s are defined in a way that it must be absolute. Now. At the time of creation of SR the meter standard was different, c was not absolute. This doesn't forbid to disprove SR by experiment. If we would have observed a non-constant speed of light in the old definition, we would observe now a inconsistency between the old and the current definition of the meter or the second which violates Lorentz invariance. Two different types of clocks which show different time dilation dependend on velocity and SR/GR is out, because we can use these two clocks to measure absolute velocity by measuring their difference. Thus, the change in the definition of the meter, which makes c an absolute constant per definition, only gives the problem of falsification of SR/GR another formulation. Ilja
Yes, Yes, Yes. Our math texts are terrible. In no math text I know of can I find a mention of God's existence. --- +----------------------------------------------------------+\ | --From Michael Stueben: high school math/C.S. teacher || | collector of mathematical humor and education theories || | E-mail address: mstueben@pen.k12.va.us || +----------------------------------------------------------|| \----------------------------------------------------------\|Return to Top
Jacob Martin (jacobmartin@geocities.com) wrote: : Sorry, no prizes here. But if you're a reasonably competant : mathematician who feels pride in solving problems just for the sake of : it and would like to see your name listed amongst others who have solved : the problems, then check out my website (address below). : As well as several warm-up problems, there are also 3 challenge : problems, which when answered via email to me will entitle you to get : your name listed. : Good Luck! : -- : Jacob Martin : jacobmartin@geocities.com or try jake@scientist.com : http://www.jmartin.home.ml.org Are you sure this URL is correct? I get a 'file not found' error. Tord RomstadReturn to Top
One runs into frequent complaints in these two newsgroups that in the United States, math and science teaching aren't what they used to be. I refer here to the high-school and elementary school levels. This may be true. On the other hand, I ran across an essay in "The World of Mathematics" by H.G.Wells bemoaning poor math instruction; and I remember when I was in high-school myself, I happened upon translation of a similar complaint from an ancient Egyptian papyrus. Anyway, whatever the truth about the U.S., I'd be interested in hearing impressions from other countries. If you, kind reader, were educated outside the U.S. and still reside there, what is your feeling about the average level of math and science instruction in your country? Has it declined over the years? How would you assess it today?Return to Top
Phil C. Plait (pcp2g@karma.astro.Virginia.EDU) wrote: > Hello net.folks: > There is a new addition to my Bad Astronomy page: > "The Moon appears larger on the horizon because > you are comparing it to foreground objects." This is really bad, I mean the book didn't said out the main point. however, I do not said that the point that the book point out is wrong, because if the moon is near the horizon, our brain will confuse about the real size of the moon. but, when this compare with the effect in physics, such as reflaction, this point is seem to be to minor one. I gusses, Phil C.plait said this is bad is due to it only said out the minor point while the miss the main. In science, if you do so, it is said to be bad. -- ·RÄRµ·°Ý¤p¥Õ¨ß»¡: ½Ð§A§i¶D§Ú,§ÚÀ³¸Ó¨«¨º¤@±ø¸ô? ¤p¥Õ¨ß§i¶D·RÄRµ·»¡: ¨ºn¬Ý§A§Æ±æ©¹¨º¸Ì¨«! Warmest, Teacher A. ************************* * * * Pager number:77736858 * * * ************************* ,, ; ;; ,,;;;' '; ,,;;''' ;;, ,,, ''' ,; ';;;''';;; , ;; ,,;''' ,,,, ,,, ,,;;;;;;;;;;; ,;;;' ; ;; , ''' ,, ,,,'' ,' ;' ,,;;'''';,,;; ,, '' ;' ;' ;;;' '' ' ,;;' '''' ,,;';;;, ;; ;;, ;; ,;';;,, ,,'' '; ''; ,;;;;;' ,, ;; ;;' ;;;' ;; , ,''' ;, ,,;;,;;'' ' ' ,;; ; ' ';' ; ,, ;; ;;'';,;'''';, ,;';; ;;,;' ,, ; ,,;;',, ,;' ,;' ;; ' ,' ,,' ,;;' '' '' ' ;; '; ';;; ';Return to Top
Matthew H. FieldsReturn to Topwrote in article <5aue6b$6q4$1@news.eecs.umich.edu>... > The very notion of music moving the emotions is foreign to some people. > To others, the link between music and emotions operates powerfully > along routes largely unknown in the west (could you pick out the > raga of odiousness?). That's probably the best anti-ethos example I know. I can like the sound of that sitar music, but I have no idea what they are trying to say in the music. I don't know the cues, because I lack the understanding of the conventions. Therefore, I may like it, but I don't get the extra-musical meaning. -- Jonah Barabas http://www.tclock.com/jbarab.htm
patrick@gryphon.psych.ox.ac.uk (Patrick Juola) wrote: >In article <5api57$pvv@dropit.pgh.net> green@pipeline.com writes: >>JohnAcadIntReturn to Topwrote: >>>It might be interesting, for example, to offer prizes >>>for a cancer cure. Say, a billion dollars to the first >>>team to crack it. [ I hope nobody is going to complain >>>that we couldn't measure the results! Ed.] >> >>People properly nourished in clean surroundings won't >>get cancer at all. >Clean surroundings, of course, being defined as excluding all radiation >such as sunlight. That certainly wouldn't be my definition. >First, that's not a cure, that's a preventative. Second, it's not >a preventative as the treatment is more injurious than the disease. Your substantiation for that would be _?_ _____________________________________________________________________________ |Respectfully, Sheila ~~~Word Warrior~~~ green@pipeline.com| |Obligatory tribute to the founding fathers of the United States of America:| | This is not to be read by anyone under 18 years of age, who should read up| | on history and the First Amendment to the Constitution, as an alternative.| | *Animals, including humans, fart, piss, shit, masturbate, fuck and abort.*| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Goddess wrote: > > In articleReturn to Top, Rebecca Harris > writes > >In article , STARGRINDER > >writes > >> > >> > >>get a life! > > > >Hear Hear! > > Yeah! I don't see why they bother with these posts on here. Why don't they post > it on some maths chat group? He does. We're not too keen on his postings either.
Jonah BarabasReturn to Topwrote in article <01bbfd66$2d3bb5c0$ea6e79a8@dbryson.mindspring.com>... > Matthew H. Fields wrote in article > <5aue6b$6q4$1@news.eecs.umich.edu>... > ..raga of odiousness... Just remembered that this is being cross-posted in physics and philosophy newsgroup. A raga is a system of "things" in Indian music that are something like scales. Each one of these "things" symbolizes an extra-musical idea. It is basically like a musical language in virtually every sense of language. Just wanted to define that for the non-composing physicists and philosophers to aid in the discourse. Please feel free to do the same for us when using quantum physics or obscure philosophical constructs. Also, if any of my fellow composers wish to add to my explanation, please feel free -- I have only a passing knowledge of ragas. Jonah Barabas
In article <5zkcsEAO+P0yIw9n@segl.demon.co.uk>, GoddessReturn to Topwrites >In article , Rebecca Harris > writes >>In article , STARGRINDER >>writes >>> >>> >>>get a life! >> >>Hear Hear! > >Yeah! I don't see why they bother with these posts on here. Why don't they post >it on some maths chat group? Is there such a thing???.......... -- R33BOX http://avnet.co.uk/tony/rebecca/
Dave Seaman wrote: > What you wrote is definitely not a floating point expression in > Fortran, and probably not in BASIC. The C equivalent, pow(num,1/2), > does not use floating point division for the exponent, either. No, you'd have to write pow(num, 1./2.); or better yet, pow(num, 0.5); since you'd still have integer division with 1/2, which yields 0, not one-half. -- 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 man made hell"Return to Top
Jim Carr wrote: > Wasn't there a bit of paranoia in the 60s that the Soviets were still > using tubes, not because they were too backward to use solid state > devices, but because they were better hardened against EMP? > Isn't the Space Shuttle using core memory for a similar reason ?Return to Top
> Keith SteinReturn to Topwrote: >>In article , "Thomas N. Lockyer" > writes >>>The mass ratio for both the proton and neutron can be calculated from just the >>>fine structure constant, using a geometric model. It's on my web page. Set >>>your computer to double precision and check it out! >>>Regards: Tom: http://www.best.com/~lockyer/home.htm > >>Thanks Tom. >> >> I very rarely go surfing,but this I GOT TO SEE. It sure sounds GREAT! >>Just what I was after. Thanks Tom. > Sorry to say this Tom, but couldn't find any computer program on >your web page, but perhaps I missunderstood. If you really do have a >program which derives the proton/electron mass ratio, I would really >like to see it. Could you perhaps post it onto this thread Tom ? -- >Keith Stein Keith; The equations are summations and you will need to insert them into some math software that will accept them. I use Mathcad and simultaneously calculate both dimensionally and numerically. I am not a mathematician, but I find that the math software is a great leveler. There is a computer program in the book, but it is 400 lines of code and does the summations as a loop subroutine. This news group format is not good for typing equations, that is why they were put up on the web pages. I would rather refer to the web page, for the equations, rather than clutter the news group with long posts. Several people have used the information on the web page and have said the model works as advertized. By doing the work, it makes the results more dramatic for the reviewer. BTW: Experimentally, the final ultimate decay products for any decay are just electrons and neutrinos (and the stable proton). This model shows that good results are possible by reversing the process. The proton and neutron models are composed of electrons and neutrinos, and are the first models to ever give the mass and difference in mass between the proton and neutron. Further, the model requires the known decay electron and neutrino when the neutron decays into a proton. Not only that, but the model's scaling gives the mass contribution of the decay electron and neutrino, exactly. The decay includes the electrical potential energy between the electron and neutrino, when part of the neutron, thus giving the model's approach credibility. There is no question that this model is A correct model, the computer tells us that. The only debate is; is this model THE' correct model. The standard quark model is no competition, because the quark model simply does not work at this level of ordinary matter. Regards: Tom. http://www.best.com/~lockyer
Leonard Timmons wrote: > > Science is not digital, but analog. Some science is very good at > describing the world and predicting its future state. Other sciences > are not very good. By most any measure the science of psychology > when used to describe and predict the behavior of human beings is > not very good. It is so bad that it fails my "good enough to > pay attention to" test. Psychology is now where astronomy was > before the invention of the telescope. You should take its descriptions > of human beings and their mental states with a chunck of salt. You > should take its predictions of human behavior with a crystal about > ten times as large. Wil Milan wrote: I wasted a couple of years majoring in psychology, so I probably know the holes in psychology better than most. And there is much to criticize about modern psychology. Some aspects of it are quite well established and quantifiable, however, and modern IQ tests are much better in this regard than you may realize. In fact, the repeatability and verifiability of IQ measurements are probably much better than the determination of distances to distant galaxies, and we definitely still consider that science. I have some real misgivings about IQ tests and how they're interpreted and used, but it's not all junk either. Wil Milan ====================================================== I believe that this topic is directly related to how people relate to the possibility of Extraterrestrial life. One might ask a person "If jack's son is my son's father, how am I related to Jack"? The person who answers "his son" would probably have a higher IQ that most. However, how many could intuitively see the symbolism of the pathway painted in the background of the "Mona Lisa" by DaVinci? Are they related? Logical and creative reasoning are very different and directly related to the determination of the validity of evidence. Consider the following from a recent issue of "Psychology Today": "Creative people alternate between imagination and fantasy, and a rooted sense of reality". "...Great art and great science involve a leap of imagination into a world a that is different from the present. The rest of society often views these new ideas as fantasies without relevance to current reality. And they are right. But the whole point of art and science is to go beyond what we now consider real and create a new reality. At the same time, this ‘escape’ is not into a never-never land. What makes a novel idea creative is that once we see it, sooner or later we recognize that, strange as it is, it is true. Most of us assume that artists-musicians, writers, poets, painters-are strong on the fantasy side, whereas scientists, politicians, and business people are realists. This may be true in terms of day-to-day routine activities. But when a person begins to work creatively, all bets are off." The difference here is between divergent and convergent thinking, and I believe that IQ tests are now being re-written to adjust for these different types of approaches. Think of the brilliance of Leonardo. His genius was not limited to the left side of his cerebellum. His drawings of the internal structures of the human body are still in use today, not to mention those of water flowing that show details now proven with high speed photography. One of the NASA scientists who was working on the Mars rock took pictures of it taken by electron microscope home and asked his teenage daughter what she thought it was. She replied "bacteria". -bob tarantinoReturn to Top
Joseph MazeauReturn to Topwrote: >Hello all, I'll make this brief. How would one determine the current >output of an electrolytic (pulse-discharge) capacitor in amps given the >cap's microfarads and the voltage? If I need more information on the >capacitor, (i.e. resistance, whatever) please let me know and I will find >the needed info. I need to figure out the current so I can plug it in to >a series of equations. Please reply if you need more information or if you >have an answer for me. Thanks much. :) Look up LC, RC, and LRC circuits. Look up "impedence" and "impedence matching." What you get depends upon where it goes and where it originates. -- Alan "Uncle Al" Schwartz UncleAl0@ix.netcom.com ("zero" before @) http://www.ultra.net.au/~wisby/uncleal.htm (Toxic URL! Unsafe for children, Democrats, and most mammals) "Quis custodiet ipsos custodes?" The Net!
mnd@ciao.cc.columbia.edu (Mohib N Durrani) wrote: > Bismillah hir-Rahman nir-Rahim > ( In the name of ALLAH, the Most Beneficent, the Most Merciful ) > > THE MUSLIM STUDENTS' ASSOCIATION (MSA) of COLUMBIA UNIVERSITY > 102 Earl Hall, Columbia University, NEW YORK, N.Y. 10027 Get a good dictionary. Look up "fetish." Sterculius is giggling; so is Zool, the worm who forever eats his tail, and the big stack of tortoises - each and every one of them! -- Alan "Uncle Al" Schwartz UncleAl0@ix.netcom.com ("zero" before @) http://www.ultra.net.au/~wisby/uncleal.htm (Toxic URL! Unsafe for children, Democrats, and most mammals) "Quis custodiet ipsos custodes?" The Net!Return to Top
Walter Polkosnik wrote: > > Is there a quick and simple technique for measuring the coherence length of > a laser? I know of the Michelson interferometer technique, I'd like > to get a detailed description of that technique or another. If anyone could > provide me with a reference to a text, paper or even web page, I'd > appreciate it. Interferometers are suitable if the coherence length is short, a couple of meters or less. If it is longer than a foot or two, then you can use electronic techniques: you shine it on a fast enough detector diode, then digitize and fourier transform the resulting signal. This latter method certainly is quicker and simpler. Doug McDonaldReturn to Top
D J Green wrote: > This is a contradiction, and shows that outside and before the Universe, > nothing could exist. It's my way of disproving the existence of God > incidentaly, since nothing could not have formed the Universe from the > outside. > Interesting how two people can perceive the same situation and draw two opposite conclusions. I've always thought that since some force had to set the universe in motion in the first place, it would have to have been God. The order to 'start' the universe would have to have come from outside - assuming there was ever a time it did not exist. -- David S. Monroe David.Monroe@cdc.com Software Engineer Control Data Systems 2970 Presidential Drive, Suite 200 Fairborn, Ohio 45324 (937) 427-6385Return to Top
In article <5aue6b$6q4$1@news.eecs.umich.edu>, Matthew H. FieldsReturn to Topwrote: >Actually, evidence has it that "Aboriginals" of other cultures who have >no prior exposure to Western music do *not* catch on to it right away. Some emailed me to ask if I was the person who'd been going on at some length on the notion of "universal" musical features over in rec.music. classical a while back. Reading through this thread, I guess I know why they'd ask. I beg the indulgence of those of you who've seen this before (seems like I wind up posting it once a year), but it seems to me that this is somewhat germane to the point that Matt is making (he's entirely right, incidentally - there's a nice story about a Balinese audience hearing their first Beethoven told by Colin MacPhee in (I think) "A House in Bali" in which the comment at length *not* upon the features of the work, but what it lacks - a drummer to provide some order and a little refinement of the soul on LvB's part (as evidenced by the chaotic and "wailing" quality of the work). There's also the story about a missionary bunch in Shanhai trying to figure out why their congretations had "Yes, Jesus Loves Me" down pat but seemed unable to recognize the "greatness" of "Guide Me, Oh Thou Great Jehovah...." One of the quickest ways to look at "universal" features is to listen across cultures. A questionsposed by this idea that we judge a work of music only by some appeal to a vague notion like "beauty" which is an "objective" quality of "what we hear" winds up touching on what happens when we "hear" work whose codes are hidden from us by cultural difference. Of course, our own experience tells us that we can really enjoy or be moved by all kinds of thing which are *way* outside of our cultural frame of reference - work which, if we're pretty suspicious, might actually have nothing to do with the same criteria for quality that a "native" listener might "hear." To the extent to which we might be uncomfortable with the idea of simply pitching out any of those things we'd need to know to modify our judgments of quality, a likely course to pursue would be to take the notion that we "just hear" something, and to then wonder about what features of the "music" we listen to might be thought of as somehow "universal." In order to do this, we look at musical behaviour as it exists in the world. The other approach is to wonder about a kind of universalism of perception (i.e. music cognition). I'm sure that there are lots of other folks better qualified to discuss this than me. But I am interested in and have done some study on the way that the question of this idea of universals has been talked about by Ethnomusicologists; that study has had a considerable effect on how I think about *lots* of different kinds of human activities. A while back, there was a similar kind of discussion over in rec.music.classical which forced me to do some reading and dig out some old lecture/paper/presentation notes from the days when my beloved was doing her Ph.D. at Cornell. It looks like it dates from '82 or '83. While the historical portion is probably a good summary of the notes from the field, it ought to be pointed out that this is in no way exhaustive, and could maybe use an update. I owe a fair amount of credit to some presentations by Merriam and Bruno Nettl, who get quoted extensively here. It is *they* who are the thinkers here, with me merely the amanuensis. I've run the stuff here past some folks who're still quite active in the field, and the feedback I got is that it's still a pretty reasonable account of the status of the idea of "universals" as hunted for by the larger community of Ethnomusicology. One friend claims that there's a back issue of the journal "Ethnomusicology" from the late 70s/early 80s dedicated to these issues. Of course, the interesting thing to contemplate is that our Ethnomusicological forebearers went out into the world to gather data for and (they thought) to codify precisely the kind of wooly "objective" features that we'd need to have to make sweeping claims about the "universal" features of a given musical feature. They were, in fact, *sure* it was out there when they left. However, they actually went out and looked, and what they found altered their views. As it started out, the idea of musical universals was a seductive view - while all the customs of the world multiplied and got strange and so on, we could always fall back on this notion that "music" was intelligeable to *everyone.* The guiding assumptions of this suggested that there was only one set of "universal" rules of music [at that time, they were thought to be rooted more in acoustics rather than neurons] which were universally valid - either because all "other" kinds of music were either degenerative (or generative) stages or because X was the only "true" music. But that's the late 19th century [Romanticism, Colonialism, cultural imperial- ism, etc.]. By the twentieth century, the data started to come in from the field in earnest. It continues to. By the time we start getting the field data back and the major figures of the field in the early-mid 20th c. start writing, the ethnoids look at the data and - surprise! - they don't buy the notion. This includes Sachs, Jaap Kunst, Merriam, Hornbostel. In fact, it's not until really the late 60s/early 70s that ethnoids like Mantle Hood and John Blacking really got into things again. In part, that return to the question is prompted by developments *outside* of the data itself, most notably linguistics as Noam Chomsky did them, Structuralism, etc. Some folks might say that the Ethnomusicology of the 1960s couldn't happen until the antiuniversalism which arose from the field work of the early part of the century had established itself and then began to overstate its case, with the new interest being refined and restated. It's safe to say that folks who looked into the subject in the the 60s found themselves in a similar position to those folks who discuss the experimental evidence which suggests that the brains of men and women are hardwired differently; In addition to having some difficulty building from the low level to high level of function, they additionally had to account for a fair amount of empirical data that undercut a strictly determinist view - it simply appeared that there was as great a range of behaviour and competence *within* the groups of like-wired individuals as *across* the boundaries, and that the cultural or environmental "non-universals" seemed to have much more to do with that. The "universals," once discovered, just didn't get folks the distance that the Universalists claimed. If, as ethnomusicologists during this century have had to do, you wind up with data that doesn't support the naive 19th century Universalist view of music in which different kinds of musical behaviour are more or less waystations on the way to the [fill in dominant bias], what problems obtain? It seems like there are two basic problems: 1. Coming up with some kind of conceptual framework that's sufficiently broad to be useful across any imaginable cultural or temporal difference. 2. Coming up with the specific thing that all musics have in common. As they did it, ethnomusicologists wanted to find those features that are ubiquitous, actually *fit* the definition of music, and as a final bit of work, exclude what could be regarded as music but isn't actually done. In short, define the outer boundaries and then tell us what's really in the circle as empirically verifiable human practice. That's rather a tall order, and might suggest why one would be circumspect undertaking such an activity. In the anecdotal sense, I find it much simpler to begin from the simple observations that definitions are done by persons, and to look at the community and context in which human activity occurs; much simpler. I'd like to return for a minute to the "ubiquity" aspect of the discussions that ethnoids have about musical universals. What us poststructuralist types would call a "totalizing discourse" would train their heat seekers on that right away in terms of talking about what it means. Are those universals things which are present in every instant of musical sound [that obviously is connected to the definition of music]. Having set up the universal, one ought to be able to instantly distinguish it from all other kinds of sound - silence (!?), speech, insects, machinery, wind. Even if you don't believe the anecdotal evidence of your own ears [which are occasionally fooled by mimicry of any number of sorts], all that data collecting from up and down the world seems to add up to nearly every ethnoid I ever met as "not bloody likely" for an outcome. Beating a hasty and well-advised retreat, the bruised universalist might recoup by asking whether there is anything which is present in every example of musical behaviour. The basic units. Note that we're not going for the grand sweep of knotted ganglia; all we want is a list of what everyone who says they do music has in common with everyone else. I resort again to my old lecture notes from this symposium on musical universals that must date from when my wife was at Cornell. The list is even more dreary than I remember it, and I'd really hoped that I'd written down some of the more interesting exceptions to what seemed to me at the time to be patently obvious things that everyone did. From the vast store of Ethnomusicological data, here's a reasonably agreeable list: More or less clearly marked ends and beginnings. Variable levels of simplicity and complexity. The musical thing is composed of sub-things. There is always more than one minimal unit [Cage has three sections in 4'33"] The sub units may be exchanged for one another to make new things. Some redundancy prevails, some repetition, some variety, and that groups of persons practicing these behaviours articulate them by means which may slightly resemble texture, rhythm, or sequences of pitched or non-pitched material [this was a hotly contested issue, particularly when one of the panel used the word "melody" and there was considerable anecdotal discussion about whether or not culture X has a concept of "melody."] I saved the most interesting for last, and my notes are a little cryptic, so I could be off a bit. The panel seemed to agree that there was some level of simplicity and complexity beyond which the large majority in a kinship group or culture do not venture; There seems to be a widespread tendency for some kind of perceptual bandwidth - even if a culture's definition of musical behaviour is broad, many do not venture to the edges of the definition. There's a third approach which follows the sensible pullback from *that outpost of universalism, and at that point I can start to pay more serious attention to it. The battered Universalist draws back, wisely regroups, and heads for what might be seen as safe harbor; Are there any sorts of things that are found in each musical system? [we're talking about plural *musics* here, of course] Are these musics or [if you want to go to the wall for a definition that describes music as a language (not me, boss. That lifeboat's *way* too leaky)] dialects somehow in some way alike? Are there any individual characteristics which are present in all of 'em? They don't have to be found in "every" musical behaviour, just within the broad categories of some "group" [I'll avoid the rows that ensue the moment one starts creating "boundaries" for social groups and "run roughshod" over what I think is an interesting and valid line of discussion]. I think that this is more or less the view that ethnomusicologists began to pursue in earnest when they returned to thinking about "universals" in the 70s. At this point, it ought to become clear *why* it might be possible to describe the possibility of cross-temporal and cross-cultural features in a less boneheaded manner; it quite simply allows for the discussion of both "acoustical" and "behavioural" parts. So, what appears from the fieldwork on *this* one? No as much as one might imagine, actually; here, from my copious notations, is what shows up: 1. It would appear that all cultures have singing. 2. In the vast majority of those cultures, there's a primary melodic interval that bears a vague resemblance to something in the territory of a major second [and I'm playing *extremely* loose with observations about tuning here in the interests of charity] - that is, between 75 to 250 cents somewhere. It's actually rather rare to even find cultures in which pieces progress exclusively by thirds or fourths, or half or quarter tones. In fact, the musics of the Native South American populations are of interest precisely because *they* do. 3. Pieces tend to descend at the end. The data suggest that they're not all uniform in terms of their beginning, however. 4. Some internal variation and repetition occurs. 5. They have a structure based on the length of events and dynamic stresses. Not exactly earth-shaking, huh? But by now, we're starting to talk about the observations of "behaviour" as a social phenomenon also. So, what kinds of "universals" in the sense I defined above might ethnoids agree on in terms of the ways that people in groups conceptualize music? Obviously, the literature I'm familiar with discusses and disputes on *this* kind of question at great length. Here's what seems to be a short and relatively uncontroversial list: 1. "Musical behaviour" is associated with the supernatural. 2. "Musical behaviour" is composed of artifacts or objects of units which tend to be uniquely identified. This identification takes a dizzying variety of forms; by performer, by ritual, by place, by creator, by object, by title. One doesn't merely sing. One sings *something.* 3. There are associations made between speech, dance, and musical behaviour. 4. When viewed as self-contained system, various musics have some common properties in terms of the systems themselves; differential levels of musicality [this is considerably broader than the talent/profession aspects of the question], tradition-carrying networks, and something resembling the idea of a "repertoire." And at *this* point, the clever and well-read ethnoid back from the field or at least cognizant of the rest of the world starts studying the extent to which the social dynamics of musical behaviour as a cultural activity start doing interesting things like, say, producing bodies of work which run contrary to the "universal" "acoustic" phenomena I mentioned earlier. I think that some interesting work in the field involves looking at the ah... "statistical universals" [we all more or less do this some of the time when we say we are talking about music]. I came away from looking and reading with the rather simple conclusion that the looking at musical behaviour as a social construction tended to take me much farther then building my edifice out of the amazing "universals" which all that field work brought home during this century. That's (in part) how I got here, and it's also one of the reasons that I tend to get a bit itchy when I hear talk which presupposes universal effects.. >I suppose that person has never heard a song, been to a movie with a >dramatically linked soundtrack, or seen any television. > >The very notion of music moving the emotions is foreign to some people. >To others, the link between music and emotions operates powerfully >along routes largely unknown in the west (could you pick out the >raga of odiousness?). > > >-- >Matt Fields URL:http://www-personal.umich.edu/~fields -- When I pronounce the word Future,/the first syllable already belongs to the past./When I pronounce the word Silence,/I destroy it./When I pronounce the word Nothing,/I make something no nonbeing can hold./ (Wislawa Szymborska) Gregory Taylor WORT-FM URL:http://www.msn.fullfeed.com/~gtaylor/RTQE.html
n2.dan.servtech.com> <59v7vq$mlo@news-e2c.gnn.com> <32ca943b.261631488@news.adnc.com> Distribution: : >merk077@servtech.com (Gregoire) wrote: : >Every process appears to be change taking place over time, and I see : >no reason not to include mental processes (such as conscioussness). : >At one moment, your brain is in one state, at a later moment, it is in : >a different state. The sequence of states constitutes the mental ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ : >process or train-of-thought (or conscioussness). ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Does that mean to say that a computer thinks because the precosses inside it follow after each other? This statement is dangerous (and strictly not physics) and I believe it to be incorrect. I think consciousness is more than just a sequence of events. I believe the events are controlled by a truly random system (QM) and associated Data retrieval. A 'train-of-thought' does not appear to describe the random factor but it does demonstrate the necessity for time. Time is imperceptible. It permiates everything and yet is undetectable but measureable. It can be observed, but only by a concious observer and the concious observer cannot observe a single unit of time because it is infinty divisible. The only way to observe time standing still is to take a concious mind (lets say Data from Star Trek) and slow it's thought processes down to zero. Only then will zero progression be noted, but can't because progression is needed to observe the lack of progression. This is a contradiction, and shows that outside and before the Universe, nothing could exist. It's my way of disproving the existence of God incidentaly, since nothing could not have formed the Universe from the outside. DavidGReturn to Top
Rebecca Harris (rebecca@tharris.demon.co.uk) wrote: [...] > What is was the point in writing all that "stuff" about god??? > I am an athieist(probably wrong spelling)But I believe that everyone is > allowed their own opinion......So why preach about "the wonderful and > powerful god"? I can see that you are posting from UK. I have spent three years in the USA (I am from Spain) and never imagined before the level of religious fanatism I would find here. This is something that a normal citizen of a typical western country would never suspect before arriving to the paradise of religious nonsense. The problem is that these people is supporting such a deal of nonsense that they cannot get ride of their obsession to get some kind of support that help them to overcome their contradictions. But people just plagued by their own contradictions are the nicest ones. You should see those who overcome their obsession by engaging themselves in a restless persecution of "heretics" and unbelievers. The only thing that saves this country from more witch hunts is its diversity and the First Admendment that arises from it. Now more than ever I am sure that the First Admendment does not survive because American people are high in tolerance, but because they are diverse and do not wish to be victims of other's intolerance. Miguel A. LermaReturn to Top
Jan Zumwalt wrote: > > I found this discussion quite interesting as I have chosen to add a section > on electronic safety to my web. Misconceptions such as are found here could > prove potentially quit dangers! > > 1) Only pure distilled water is non conductive, tap water makes a very good > conductor due to contaminants and mineral content. Therefore a person in > contact with an electrical device in water is as good as touching it. Not always. Baton Rouge tap water is, in fact, pure enough that it is an extremely poor conductor. > 2) Electricity does not have to travel "through" a person to be lethal. > Most things including our bodies have capacitance, death comes quit easily > from "charging". ^0 cycles is particularly dangerous since human > capacitance is very responsive to this frequency. > > 3) While a direct current of 200ma is considered the minimum current > necessary DIRECTLY across i.e. in contact with the heart, to kill in > practice it takes several amps externally to become lethal. There are > exception of coarse. For example I saw an electrocution killed from bending > over a 110v light switch and the contacts touched his forehead. He died in > several minutes. This is a good example of electricity NOT traveling > THROUGH the body, as he was on a dry tiled floor! He must have been contacting a ground *somewhere*. 120Vac cannot kill you by contact with one wire. One wire fatalities are only possible with much higher voltage or frequency sources. Note that concrete and similar compounds are often, depending on composition, very *good* conductors, contrary to popular belief. > 3) Even if a person does not die instantly from immediate electrocution, > they very may well soon die there after. As we all know, electricity > travels the path of least resistance. Small voltages travel less than an > inch or two (say 400V) before resistance does them in - at best traveling > through nerve fibers which make great conductors. > > On the other hand high voltages prefer to penetrate to the bone marrow > which then offers even lower resistance. I do not know the reason for this > and except for the facts would consider it unreasonable. Now, when a person > receives a high voltage jolt(guessing 1000+) they very well may live, that > is for 5-7 days. The bone marrow is completely killed and the body > degenerates from lack of blood cell production. I have seen persons that > have received 2000v jolts that severed their fingers (thus saving their > lives) but required amputation of both legs and arms due to bone marrow > destruction. Actually, the most common cause of post-electrocution death is liver and kidney failure. When tissue of any kind is damaged by electricity, it releases a gummy compound (I forget the name) that, eventually, will clog those two organs up and kill them. > Epilog > The electric chair has drawn considerable criticism for its humanness > because it uses about 500V. Onlookers and medical professional attest that > death frequently is excruciating and sometimes prolonged. There have been > instances of persons receiving 3-5 shocks of 10-15 seconds with apparent > conscience. > > I hope this shows the seriousness of safety shows > A persons > -- > Hope this helps! > ---------------------------------------------- > Jan W. Zumwalt - Engineer > Computer Information Systems > zumwalt@alaska.net > http://www.alaska.net/~zumwalt > ***************************************************************** > * Beware the man of one book. - Chinese proverb * > * The only real equality is found in a cemetary. - German * > * The one thing not so common, is COMMON SENSE! -USA * > * Beware the opinion of a person who has used only one OS! -JZ * > ***************************************************************** > > bwsmith@cadsmith.com wrote in article <5atduv$sbo@mozart.jlc.net>... > : In article <5arhiv$o0b@mozo.cc.purdue.edu>, > : laird@puritan.ecn.purdue.edu (Kyler Laird) wrote: > : >Over lunch, the topic of bathtub electrocution came > : >up (from a scene in a movie). I've thought about it > : >a few times, but I've never gotten a good grasp of > : >the circuit involved. > : > > : >O.k....let's say that you're in an insulated (enamel- > : >coated?) bathtub with (grounded) metal drain. The > : >tub is filled with water to some height. A non- > : >waterproof device connected to 120VAC mains is dropped > : >in the tub with you. What happens? > : > > : Interesting problem. However, most newer homes now being built with > : fiberglass tubs and plastic drain pipe. > : Is there an alternative method perhaps delivering the voltage thru the > supply > : pipes, say when the subject reaches for the faucet? How about closing > the > : circuit in fiberglass tub? Could you employ wiring to metal towel rack > : adjacent to tub? > : > : BW Smith > : > : >As an extreme, consider a person standing in the > : >tub at the opposite end from the drain. The water > : >is ankle-deep. The electrical device is turned on > : >and placed right on top of the drain. I wouldn't > : >expect a fatal outcome. > : > > : >It seems to me that in order to get a fatal > : >outcome we need to get current to flow through the > : >person's heart. Providing lots of low-resistance > : >paths to ground which *don't* go through the heart > : >is not going to cut it. > : > > : > : ================================================ > : CADSmith Studio~~Design Services For The Building Industry > : http://www.cadsmith.com/ ==== email: bwsmith@cadsmith.com > :Return to Top
This is a multi-part message in MIME format. --------------B5B33ACF20 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Hello, David: Has something happened to your e-mail server? See attachment for the result of my effort to send you an e-mail message. --------------B5B33ACF20 Content-Type: text/plain; charset=us-ascii; name="MONROE.WRI" Content-Transfer-Encoding: 7bit Content-Disposition: inline; filename="MONROE.WRI" From - Wed Jan 08 13:08:43 1997 Return-Path:Return to TopReceived: from cdshub.cdc.com (mailhub1.cdc.com [129.179.161.9]) by nt2.iamerica.net (post.office MTA v1.9.3b ID# 0-11694) with ESMTP id AAA589 for ; Wed, 8 Jan 1997 13:04:34 -0600 Return-Path: <> Received: by cdshub.cdc.com; Wed, 8 Jan 1997 12:58:52 -0600 Message-Id: Date: Wed, 8 Jan 1997 12:58:52 -0600 From: Postmaster@cdshub.cdc.com To: hermital@livingston.net cc: Postmaster@cdshub.cdc.com Subject: Undeliverable mail MIME-Version: 1.0 Content-Type: multipart/report; report-type=delivery-status; boundary="=_mh.ndn.12d7.0254.32d3ee6c_=" X-Mozilla-Status: 0001 Content-Length: 3337 --=_mh.ndn.12d7.0254.32d3ee6c_= Content-Type: text/plain; charset=us-ascii Your message was not delivered to the following recipients: David.Monroe@cdc.com: User unknown --=_mh.ndn.12d7.0254.32d3ee6c_= Content-Type: message/delivery-status Content-Transfer-Encoding: 7bit Reporting-MTA: dns;cdshub.cdc.com Final-Recipient: rfc822;David.Monroe@cdc.com Action: failed Status: 5.1.1 --=_mh.ndn.12d7.0254.32d3ee6c_= Content-Type: message/rfc822 Received: from [207.22.194.10] by cdshub.cdc.com with ESMTP; Wed, 8 Jan 1997 12:58:52 -0600 Received: from tel_ppp0036.livingston.net ([207.22.211.35]) by nt2.iamerica.net (post.office MTA v1.9.3b ID# 0-11694) with SMTP id AAA454 for ; Wed, 8 Jan 1997 13:04:08 -0600 Message-ID: <32D40AC3.7185@livingston.net> Date: Wed, 08 Jan 1997 12:59:47 -0800 From: hermital@livingston.net (hermital) Reply-To: hermital@livingston.net Organization: Consciousness/Holographic Paradigm X-Mailer: Mozilla 3.01 (Win16; I) MIME-Version: 1.0 Newsgroups: sci.physics,sci.skeptic,sci.physics.relativity,alt.sci.time-travel To: Dave Monroe Subject: Re: Time and its existance References: <511vlk$g6p@hil-news-svc-3.compuserve.com> <01bbe547$3d5d8b40$4b0d44ab@prsingh-pc.cisco.com> <32AC5F38.148@space.mit.edu> <01bbe79d$612c5e40$bad044ab@prsingh-pc.cisco.com> <58nc7i$dhp@usenet.rpi.edu> <32b3dd69.10131602@news.demon.co.uk> <58s7it$lir@usenet.rpi.edu> <58uutc$q7i@usenet.rpi.edu> <58v7us$hht@trojan.neta.com> <58vb7v$qoq@usenet.rpi.edu> <32b5b39e.3988264@netnews.worldnet.att.net> <59q63r$q2@news-e2c.gnn.com> <32D3E403.5059@cdc.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit On Wed 1/8/97 13:14 -0500 Dave Monroe wrote: > > D J Green wrote: > > This is a contradiction, and shows that outside and before the Universe, > > nothing could exist. It's my way of disproving the existence of God > > incidentaly, since nothing could not have formed the Universe from the > > outside. > > > > Interesting how two people can perceive the same situation > and draw two opposite conclusions. I've always thought > that since some force had to set the universe in motion > in the first place, it would have to have been God. The > order to 'start' the universe would have to have come from > outside - assuming there was ever a time it did not exist. There is, of course, at least one other possibility, Dave. The scientifically rational Holographic Paradigm describes our sub-light-speed material universe as a hologram within a hologram within a hologram, thus the universe did come from something, there was a time that our universe did not exist, it was started from outside and that which human beings call God is now also known to be a synergistic hologram. -- Alan When you have a quiet moment, seek egolessness and remember that the human body and nervous system are merely the organic user interfaces that interpret holonomic materiality for a unique transcendental entity that emerges reciprocally within the pre-existing vital energy of uncreated absolute pure being. --=_mh.ndn.12d7.0254.32d3ee6c_=-- --------------B5B33ACF20--
bob tarantino (robert.tarantino@bethlehempa.ncr.com) wrote: --SNIP-- of discussion of IQ tests : types of approaches. Think of the brilliance of Leonardo. His genius was not : limited to the left side of his cerebellum. His drawings of the internal --SNIP-- Hi, A couple of corrections, as this was posted to sci.skeptic. 1) It's the Cerebrum, not the Cerebullum where higher thought occurs. 2) The lateralization of Brain is not an accurate model. It only applies to Americans who have extremely severe forms of epilepsy. Lateralization of brain functions varies greatly form individual to individual, and seems to influenced largely by developmental experience. -- -- Matthew Saroff| Standard Disclaimer: Not only do I speak for _____ | No one else, I don't even Speak for me. All my / o o \ | personalities and the spirits that I channel ______|_____|_____| disavow all knowledge of my activities. ;-) uuu U uuu | | In fact, all my personalities and channeled spirits Saroff wuz here | hate my guts. (Well, maybe with garlic & butter...) For law enforcment officials monitoring the net: marijuana, cocaine, cia plutonium, ammonium nitrate, militia, dea, nsa, pgp, hacker, assassinate. Send suggestions for new and interesting words to: msaroff@pobox.com.Return to Top
Joseph H Allen wrote: > > Here are some paradoxes: > > -- black ravens > > Suppose you say that all ravens are black.... [snip] Ok, ForAll x s.t. raven(x) -> black(x) > > Now the negation of "all ravens are black" is "all non-black things aren't > ravens". The two statements are logically equivalent. ... [snip] Hmm, the negation of a wff, hmm, lets go to prenex normal form first: FarAll x s.t not(raven(x)) or black(x) (Since a -> b == not(a) or b) And then to conjunctive normal form: not(raven(x)) or black(x) So if we "negate" this formula we get: not[not(raven(x)) or black(x)] or, applying DeMorgans: raven(x) and not(black(x)) So the "negation of 'all ravens are black'" is the above formula. Hmm, seems to say that all non-black things are ravens, NOT "all non-black things aren't ravens". I'd say that your premise above is wrong, the two statements you quote are NOT logically equivalent. Assuming I did the conversion to clausal form correctly, it has been four years or so since I've done it. [the rest of this and other so-called paradoxes cut] Regards, dave -- Remove "__" in header to reply. Dave Bergacker (daveb@minc.com)Return to Top
Of course pow(2,1/2) won't 'work' in C, nor will any expression in which 1/2 is intended to produce the value .5. On the other hand pow(2,1.0/2.0) and pow(2.0,1.0/2.0) produce root 2 on all three of my C compilers. -- John D. Goulden jgoulden@snu.edu > What you wrote is definitely not a floating point expression in > Fortran, and probably not in BASIC. The C equivalent, pow(num,1/2), > does not use floating point division for the exponent, either.Return to Top
In article <32d3593b.6335568@news.ping.be>, AIR1@ping.be (Stephan Verbeeck) writes: [...] > > --------Return to Top------- Ah... is there, by any coincidence, any relationship with the scientific magazine AIR ? That would explain a few things. wondering, Patrick.
There are IRC channels for the real-time discussion of physics on EFnet, Euronet, and Undernet IRC networks. For more information, read the URL: http://www.shef.ac.uk/~phys/people/pkinsler/irc/phy/ #Paul. -----------------------------+----------------------------- Dr. Paul Kinsler Department of Physics (phone)+44-114-2224283 University of Sheffield (fax ) +44-114-2728079 Sheffield S3 7RH IRC: haberman (on #physics)Return to Top
Hauke Reddmann wrote: > > Absolute Zero (abz@gnn.com) wrote: > : > : Black holes are "black" because they can suck in light. > : How can light be sucked in if it moves at a constant speed???? The black hole > : must have "slowed it down". On its way back down to the black hole, does light > : or anything else travel faster than the speed of light? > : > : On more thing, if anyone knows anything about Einsteins' acceleration frame > : stuff..please explain!!!! > : > Yes, your knowledge of SR/GR is absolute zero, indeed :-) > > The light path DEFINES the metric! Remember the famous > "light bend" solar eclipse experiment? The path ISN'T > bend! It is straight BY DEFINITION. Your everyday > experience of space and time is completely useless in > the vicinity of a black hole. > Read some GR texts. Come back in 10 years :-) > -- > Hauke Reddmann <:-EX8 > fc3a501@math.uni-hamburg.de PRIVATE EMAIL > fc3a501@rzaixsrv1.rrz.uni-hamburg.de BACKUP > reddmann@chemie.uni-hamburg.de SCIENCE ONLY Not a very helpful explanation to somebody asking a reasonable question. Yes the light does "slow down" in reference to the frame of observation of observers outside the black hole. However, in its own frame, it always travels at the same speed. The observed "slow down" is due to the time dilation produced by the mass of the black hole. Hope that helps a little for somebody who isn't steeped in general relativity. Bill GillReturn to Top
Would anyone tell me (qualitatively) how Casimir Effect is used to explain sonoluminescence?Return to Top
abz@gnn.com (Absolute Zero) wrote: >Please help!!! > >Black holes are "black" because they can suck in light. >How can light be sucked in if it moves at a constant speed???? The black hole >must have "slowed it down". On its way back down to the black hole, does light >or anything else travel faster than the speed of light? > >On more thing, if anyone knows anything about Einsteins' acceleration frame >stuff..please explain!!!! Light travels at constant velocity in a vacuum for all observers - lightspeed. Light viewed by several observers at different relative velocities is blue- or red-shifted (Doppler shift). Light traveling in a medium moves at (lightspeed)/(refractive index). If the escape velocity of a concentration of mass exceeds lightspeed, light doesn't make it out - it is forced to orbit or its path is a curve which returns to the "surface." Another way of looking at it is that light making its way out of a gravitational field is red-shifted for an external observer. Make the gravitational field sufficiently strong and the red shift goes to infinity while the progression of time goes to zero - no light. -- Alan "Uncle Al" Schwartz UncleAl0@ix.netcom.com ("zero" before @) http://www.ultra.net.au/~wisby/uncleal.htm (Toxic URL! Unsafe for children, Democrats, and most mammals) "Quis custodiet ipsos custodes?" The Net!Return to Top
Is there a quick and simple technique for measuring the coherence length of a laser? I know of the Michelson interferometer technique, I'd like to get a detailed description of that technique or another. If anyone could provide me with a reference to a text, paper or even web page, I'd appreciate it. I'm also interested in being able to quantify the vibration exhibited by an optical table. -- Walter Polkosnik walt@panix.com Physics Department http://www.physics.qc.edu/~walt Queens College, City University of New York (718)-997-3364 voice Credo quia absurdum est. (718)-997-3349 faxReturn to Top
Greg d. Moore wrote: > > Now, here's the real question: How would you use this mechanism to > > transmit information? (The answer is you can't.) > > > > I'd have to disagree. Let's say you and I are about to start an > interstellar war. We want to rid the galaxy of the evil Grackons. > > We set up our "binary decision device" using "separated electrons" > > At the "correct" time, I check my device. If it's flipped up, > I attack first, otherwise if it's down, you attack first. > After I check mine, you check yours which tells you the > state of mine and know what to do. > >We've communicated. The only "communication" that has occurred in this example is whatever communication happened BEFORE you sent out your "binary decision device" to agree on how to interpret its state. Using your definition of "communication, you could be two light years apart, watching a non-periodic variable star located halfway between you. If the star reaches some earlier-agreed- upon magnitude by a certain date you attack first, otherwise your partner does. Does this mean you've communicated across two light years (your distance apart) in just one year (the time it takes for the light from the star to reach both of you)? To use something for communication you have to be able to effect some change in it which can be detected at a distance. But in the "spooky action at a distance" you are simply establishing its state (collapsing the wave function) not setting its state. ---peterReturn to Top
ags@seaman.cc.purdue.edu (Dave Seaman) wrote: >Although languages like Fortran and C do give 2^(1/2) = 1 (and so does >BASIC, if I remember correctly), I doubt it. Since you're not using exact FORTRAN, i.e. you're using (^) instead of (**), I assume you're not mentioning other details like (1./2.) is different from (1/2) because the former is floating-point whereas the latter is integer. If you do not mention this exact detail, you can't make blanket statements like "2^(1/2)=1" . Every BASIC I have ever used has given 2^(1/2) as the square root of two to several decimal digits of accuracy. "Several" is a bit vague because some BASICs let you put a "#" sign to signify extra precision and not all BASICs store their default floating-point numbers to the same precision. I have never used a BASIC which even allows me to calculate 2^(1/2) as an integer. I can calculate it as a floating-point number, and explicitly truncate the result, but that's not the same as calculating it as an integer to start with. One BASIC I know allows integer division, but I don't know about explicitly restraining powers to be integers. C I can't comment on. "languages like" FORTRAN and C ... that includes Pascal. The original Pascal didn't even have a power statement/operator/function, so you had to do 2^(1/2) by taking logarithms or writing your own subroutine/function. This was clearly floating-point. People soon got fed up with this and put a power facility in Pascal. It sounds like languages like FORTRAN and C do indeed give floating-point answers.Return to Top
Dave Monroe wrote: > Interesting how two people can perceive the same situation > and draw two opposite conclusions. I've always thought > that since some force had to set the universe in motion > in the first place, it would have to have been God. The > order to 'start' the universe would have to have come from > outside - assuming there was ever a time it did not exist. 'Outside/inside' is one of those dualities which poses such a quandry for us humans, like a zen koan -- difficult to penetrate. But I don't see why your so-called order to start the universe couldn't originate from inside as well as outside, both or neither. Impossible to separate oneself from 'God' because all that exists either is God or carries the divine spark. But conscious awareness of this is entirely another matter.... "Ah, this case I've been working on so long, so long..." Tom Verlaine 'uhaneReturn to Top
From dik@cwi.nl (Dik T. Winter) Organization CWI, Amsterdam Date Wed, 8 Jan 1997 02:23:21 GMT Newsgroups sci.math,sci.physics,sci.logic Message-IDReturn to TopReferences 1 2 3 In article <5asb6a$ma6$1@dartvax.dartmouth.edu> Archimedes.Plutonium@dartmouth.edu (Archimedes Plutonium) writes: > In article > dik@cwi.nl (Dik T. Winter) writes: > > > > Let me recap here some facts : > > > p-adics form a field > > > > No. Obviously, if there *are* primes you do not have a field. > > 3-adics form a field, 5-adics form a field > any p-adic where p is prime forms a field Eh? Did you read what I wrote after the sentence above? If there *is* a prime, there is no field. In the 3-adics 3 is the only prime (%), but because there is a prime there is no field. In a field every element except 0 has a multiplicative inverse; there is no inverse of 3 in the 3-adics. There is no inverse of p in the p-adics. In the rationals for instance 3 is *not* prime. -- % Prime in the sense of prime ideals. Not in the sense of: there are no a and b such that a.b = 3; because there are such a and b (for instance: 2 * ...11111111120 = 10 = 3 in the 3-adics). My previous proof was a bit wrong however. If there is an element with a multiplicative inverse there is no prime in the traditional sense. That was what the original proved, but in that sense 3 is not even a prime in the 3-adics. However, an element without multiplicative inverse can still generate a prime ideal (as is the case with p in the p-adics), but in a field there are no such elements. -- dik This is a problem of *timing*. And a problem of timing is a big deal in mathematics because mathematics is the science of precision. Yes I read your previous message. But you Dik assume that 3 is prime in the first place, do you not, in order to construct the 3-adics. Now, then, you construct the 3-adics and I say that the 3 is prime. But you , Dik , accuse me of saying 3 is not a prime if 3-adics is a field. I say to you Dik that we get the primeness of 3 from the special set of Reals of this set { ...., ..., ...002- , ....002+, ...003+, ....005+,....} I start with the Reals, and you Dik, I do not know where you started from. Those special class of Reals, the Whole Reals are prime in Whole Reals. So, if 2 or 3, 5, is not prime then Dik, how in the world can you even start to construct the 2-adics or 3-adics or 5-adics. Personally I think this is a major problem of mathematics. Everyone is saying these absolutist things that 3-adics is a field and yet they do not want to recognize that 3 is prime in order to prove that it is a field. And after they have proved that 3-adics is a field , they then want to forget that 3 was prime in the first place in order to prove that it is a field. All a bit hypocritical, I would say. So Dik, please tell when in the discussion you want to claim 3 is a prime number in order to prove 3-adics is a field, and then, when do you want to renounce that 3 was prime so that you can say that the 3-adics is not a field?
Wil MilanReturn to Topwrites: > jenner wrote: > > > > I'll let his TV series, his published works, and his > > Pulitzer speak for him. > > I don't doubt Sagan was a bright guy, but bear in mind that TV ratings > and Pulitzer prizes are determined by people who are largely ignorant of > science. Thus Sagan's Pulitzer for _Dragons of Eden_ may be considered > praise of his writing style, but not the accuracy of the material, which > was sometimes questionable and at times flat-out wrong. Sagan was wrong on some things, but aren't we all. I believe that the catagory for which Sagan won his Pulitzer I believe was not in journalism or music, but was in the non-fiction catagory. I'd like to think that this Pulitzer would not be delivered by a bunch of scientific illiterates. The jurors for last years prize were: Susan Sheehan, author, journalist, Washington, D.C. (Chairman); Alan Lightman, author, professor of Science and Writing, Massachusetts Institute of Technology; Brigitte Weeks, editor-in-chief, Guideposts Dr. Lightman, at least, teaches in the Physics department at MIT as well as being in the Humanities department. The other two don't seem to have a lot in the way of science credentials though they do seem to be good writers. Look at: http://www.guideposts.org/authors/authors.weeks.shtml and http://www.jazzie.com/ebbco/schpsy.htm http://www.achievement.org/autodoc/atv/atv11pgm-1 On the other hand, they really did deliver the prize to a wonderful work: "The Beak of the Finch" by J. Weiner, published by Knopf. -- Clark Dorman "Evolution is cleverer than you are." http://cns-web.bu.edu/pub/dorman/D.html -Francis Crick