HDTenEightyP/NetNews huggingface dataset:
Newsgroups: alt.sci.physics.new-theories
Subject: Re: Elapsed Time near c (was Re: Q&A on Extraterr
From: mcirvin@husc8.harvard.edu (Mcirvin)
Date: 12 Aug 92 23:09:22 GMT
   x.com><1992Jul23.080318.25996@fys.ruu.nl> 
 <1992Jul27.031252.5562@isus.UUCP><1992Aug1.005342.1@vxdesy.desy.de> <92223.102320A54SI@CUNYVM.BITNET>

<A54SI@CUNYVM.BITNET> writes:

>As to the range of gravity given by GR, I don't think it behaves so classical
>at long ranges. For instance, I heard it's got repulsive terms that are weak
>normally...I am fairly sure that G can act surprisingly like EM, noticeable
>more with much denser matters.

The statement that the range of gravity is infinite (as someone,
possibly Scott Chase, pointed out earlier) means that there's
no exponential damping as you go to large distances.  On the scale
of the entire universe GR can have quite non-Newtonian effects,
as studied by cosmologists.  On the scale of solar systems, though,
the spacetime far away from a gravitating object is close enough
to flat that you can effectively think of Newtonian gravity being
approached at large distances.

All kinds of strange terms-- including repulsive ones-- can show
up when very massive objects spin rapidly, or possess huge internal
forces.  I think someone on sci.physics a while back mentioned
a theorem that the repulsive term between rotating objects is
never big enough to cancel the attractive term, but I could be
wrong.

When you think of weak repulsive terms, though, you may be
thinking of the "hypercharge force" idea that was floating
around for a while, based on some reinterpretations of old
experimental data.  The idea was that there existed a fifth
force that had a range short enough to give it no astronomical
effects, but long enough to affect sensitive lab experiments;
this force supposedly varied with the composition of atomic
nuclei.  Attempts to replicate the result came up negative,
though, and I don't think anyone takes the idea very 
seriously any more.

GR has some similarities to electromagnetism, but it's more
complicated, since the gravitational field (speaking vaguely)
has more independent components than the electromagnetic
field.  It's a tensor rather than a vector theory.  This is
also responsible for the fact that like masses attract, 
whereas like charges repel; but I've forgotten exactly how.

-- 
Matt McIrvin, professional gradgrind, amateur Usenet drifter
From: et@teal.csn.org (Eric H. Taylor)
Newsgroups: alt.sci.physics.new-theories
Subject: Re: Elapsed Time near c (was Re: Q&A on Extraterr
Summary: repulsive terms in gravity
Keywords: lightspeed ahead
Date: 12 Aug 92 20:38:24 GMT
Followup-To: et@et.com
Distribution: na
Organization: Eric Taylor and Associates Inc

In article <92223.102320A54SI@CUNYVM.BITNET> A54SI@CUNYVM.BITNET writes:
>As to the range of gravity given by GR, I don't think it behaves so classical
>at long ranges. For instance, I heard it's got repulsive terms that are weak
>normally...I am fairly sure that G can act surprisingly like EM, noticeable
>more with much denser matters.

interesting. repulsive terms? could you elucidate? how about some equations?
do you have any handy? anybody else have additional information?
From: gross@maxwell.ucsc.edu (Mike Gross)
Newsgroups: alt.sci.physics.new-theories
Subject: Re: Good Things come in Big Bangs
Date: 19 Aug 1992 01:36:45 GMT
Organization: University of California, Santa Cruz
Distribution: na
NNTP-Posting-Host: maxwell.ucsc.edu

In <Bt7AFB.4GI@csn.org> et@teal.csn.org (Eric H. Taylor) writes:

>The simple kinematics of elastic collision accurately model the
>behavior of photons. For example, consider radio frequency photons.
>Take a parabolic antenna (eg, satellite dish), point it straight up,
>and drop a ping pong ball into it. Notice that the ping pong ball
>will hit the focal point (horn, waveguide) after bouncing off the dish.
>The same will happen for incoming photons.

>  .                               .
>      |        |
>   .  o        o                 .
>    . |        |                .
>      .________|__*           .
>         .     | /         .
>             . |/      .
>                  .


Sorry, this only works for the lowest approximation. Ping pong balls will
not, for example, reproduce any interference or diffraction effects. This
is important in the example you gave, unless the dish is infinite in 
extent. Real radio dishes are very large in order to reduce the effect
of diffraction. 

On another level, try to explain, using ping pong balls, why electrostatic
forces can be either repulsive or attractive, depending upon the sign of
the charges involved. For this, one really needs to calculate exchange
energies using QED.

Nice try, though (keep it up!).

Mike Gross
Physics Board
Univ of California              GO SLUGS!!!!!
Santa Cruz, CA 95064
gross@maxwell.ucsc.edu
Newsgroups: alt.sci.physics.new-theories,alt.postmodern
From: ccasm@cc.newcastle.edu.au
Subject: Re: GRAVITY IS TIME ITSELF.
Organization: University of Newcastle, AUSTRALIA
Date: Fri, 21 Aug 1992 03:12:59 GMT

> In article <1992Aug19.053042.29135@odin.corp.sgi.com
> news@odin.corp.sgi.com (Net News) writes:
>>
>>			^[
>>
> 

  Isn't this the code for the ESCape key?
From: chrstie@ccu.umanitoba.ca (William John M. Christie)
Newsgroups: alt.sci.physics.new-theories
Subject: Solar Sailing
Date: 14 Aug 92 21:06:16 GMT
Organization: University of Manitoba, Winnipeg, Canada


Hi, I remember hearing on the CBC radio show a year or two back about a race that
the major countries were going to attempt to mark Columbus' discovery of North
America by Europeans.  The race was going to involve unmanned solar sail space
craft which would race to Mars and then disappear after that.  Has anyone else
heard about this?  Is such a thing being developed right now?  Or maybe I was
dreaming?   `:-|
-- 
==========================================================================
  Any opinions expressed above are usually made with some thought which   
  is my own and is not intended to represent the University in any way.
==========================================================================
Newsgroups: alt.sci.physics.new-theories
Subject: Re: Spacetime/pref ref frame...
From: yvisell@eagle.wesleyan.edu
Date: 13 Aug 92 16:55:33 EDT
Organization: Wesleyan University

In article <8042@dirac.physics.purdue.edu>, hinson@maxwell.physics.purdue.edu 
(Jason W. Hinson) writes:

> OK, I have a question.  Could spacetime actually have only one particular
> frame of reference without violating relativity?
> (I know, having a preffered frame of reference AND relativity sounds like
> I contradiction, but read on.)
> 
> In a way, this is a "can spacetime = ether" question. However, could it be
> possible that spacetime has a property that allows relativity?
> For example, say that EM waves actually do propagate through this spacetime.
> However, when you view an EM wave, insted of its speed depending on your
> speed through spacetime (as is true for other waves & mediums), it 
> would be a property of this spacetime that the speed of EM waves is
> independent of the viewer's speed. 
> 
> So the question is, is there theoretical or experimental "proof" that this
> explination is impossible.
> 

I wonder if this isn't, perhaps, just a complicated reworking of the invariance
of the speed of light.  If, that is, we observe the speed of light to be
constant (regardless of whether we imagine there to be a funny ether which
creates this "illusion"), is there any meaning to the statement that there is a
preferred reference frame (esp. if we cannot detect it) ?


Yon Visell
YVISELLeagle.wesleyan.edu


\\    //   //\\        //\\    ||          || ||         ||  ||\\      ||    ||
 \\  //   //  \\      //  \\   ||          || ||         ||  ||  \\    ||    ||
   ||    //====\\    //====\\  ||          || ||         ||  ||   \\   ||    ||
   ||   ||      ||  ||      ||  \\  //\\  //   \\  //\\  //  ||    \\  ||    ||
   ||   ||      ||  ||      ||   \\//  \\//     \\//  \\//   ||      \\||    ||
                                                                             ||
                                                                             __
                                                                            |__|
From: franl@centerline.com (Fran Litterio)
Subject: Re: Good Things come in Big Bangs
Organization: CenterLine Software, Inc.
Distribution: na
Date: Tue, 18 Aug 1992 19:07:10 GMT

et@teal.csn.org (Eric H. Taylor) writes:

> * A photon's reference frame (moving at the speed of light) always sees
>   nothing but empty space.

> * From the reference frame of a photon, the instant it sees something other
>   than empty space, it has collided, and thereby ceases to exist.

> * Photons do not see other photons.

I think you are being too anthropomorphic.  You are assuming that
concepts which apply to you in the macroscopic world also apply to a
photon (e.g., the passing of time, being in a frame of reference,
seeing things).

> * Photons that are reflected do so by bouncing (elastic collision).

Not true.  In fact, when two material objects bounce off each other,
it's (virtual) photons that do the pushing.
--
franl@centerline.com   || Fran Litterio                               
uunet!centerline!franl || CenterLine Software R&D                     
617-498-3255           || 10 Fawcett St, Cambridge, MA, USA 02138-1110
Newsgroups: alt.sci.physics.new-theories
From: news@odin.corp.sgi.com (Net News)
Subject: GRAVITY IS TIME ITSELF.
Organization: Silicon Graphics, Inc., Mountain View, CA, USA
Date: Wed, 19 Aug 1992 05:30:42 GMT


-- 

			

Newsgroups: alt.sci.physics.new-theories
Newsgroups: alt.sci.physics.new-theories
Subject: Re: Interference Patterns and Quantum
From: mcirvin@husc8.harvard.edu (Mcirvin)
Date: 12 Aug 92 22:48:22 GMT

ttak@ellis.uchicago.edu (toki  takeuchi) writes:

>OK.  I don't know too much about Quantum and physics and relativity,
>but I am interested.  I read the article about Quantum wave/particle
>thing in Sci American (siam) and was confused on why, if we observe
>light as a particle, light would be deflected by the either of the
>two slits.  I gotta go!  I'll write later.

Basically, the idea is that one of the properties we associate
with a "particle" is that it's in a particular place at any
one time.  So if you measure where the photon is, it looks like
a particle.  In the case of the two-slit experiment, measuring
which slit the photon went through brings out its "particle-like"
behavior, in the sense that there's a specific slit it went
through, a behavior we generally associate with little objects
going through slits rather than with waves diffracting through
them.

The notion of something behaving like a particle
or like a wave is a little vague anyway.  The important idea, 
which is stated precisely in quantum mechanics, is that there
are properties of a quantum-mechanical system that are in
some way incompatible with each other, so that they can't
both possess a definite value at the same time.  Usually
when something has a very definite wavelength, we say it's
acting like a wave, and when it has a very definite position,
we say it's acting like a particle.  There can be all kinds of
in-between situations as well.
 
-- 
Matt McIrvin, professional gradgrind, amateur Usenet drifter 
Newsgroups: alt.sci.physics.new-theories
From: et@teal.csn.org (Eric H. Taylor)
Newsgroups: alt.sci.physics.new-theories
Subject: e=mc^2 missing terms
Summary: should there be more to this equation than is commonly told?
Keywords: e=mc^2, einstein, matter, energy
Date: 18 Aug 92 15:16:30 GMT
Followup-To: et@et.com
Organization: Eric Taylor and Associates Inc

In talking with another physicist today he wanted to know if I had heard
about the missing term(s) in Einstein's famous equation.

He said that while in college (University of Colorado, in the 50's) a
friend of his, tried deriving the second order differential of e=mc^2.
When he did so, he found that the results were contradictory.
He then contacted Einstein himself, and Einstein response was
"Very astute. The problem is that you are missing a term."

The missing term is or includes a -1.
Being second hand, my source doesn't remember what the complete equation is.
Now I hear this third hand.
Does anyone out there have any additional information?
Is there a missing term?
What should the correct formula be?
Does anyone care to try the math and establish what the contradiction is?

/*****************************************************************************/
/* Eric H. Taylor:  et@et.com                    "Paradigm          "        */
/* President, Eric Taylor and Associates Inc.    "Rhymes with pigeon"        */
/* Project Leader, The Mars Journey              "All the time      " - ET :)*/
/* Plan: To celebrate New Years Eve 12/31/99 on Mars                         */
/*****************************************************************************/
Xref: sparky alt.sci.physics.new-theories:1997 alt.postmodern:2333
Organization: City University of New York/ University Computer Center
Date: Thursday, 20 Aug 1992 10:17:21 EDT
From: <A54SI@CUNYVM.BITNET>
Newsgroups: alt.sci.physics.new-theories,alt.postmodern
Subject: Re: GRAVITY IS TIME ITSELF.
 <Bt7vzu.AJu@world.std.com>

Well, don't say you never saw Zen Physics! Now, what is the charge of an
 electric field?
-------
CHARLES HOPE   A54SI@CUNYVM   A54SI@CUNYVM.CUNY.EDU
BUSH IN 92: ENVIRONMENT, EDUCATION, AND NO NEW TAXES.
Newsgroups: alt.sci.physics.new-theories
Subject: Re: Why C? Why Ask Why?
From: mcirvin@husc8.harvard.edu (Mcirvin)
Date: 12 Aug 92 22:57:39 GMT

ttak@ellis.uchicago.edu (toki  takeuchi) writes:

>Second, I asked my physics teacher a while back if gravity acted
>on masses instantaneously (I guess gravitons going at infinite velocity)
>but I *think* he said that it goes at the speed of light.  If that's
>the case, I suppose magnetic forces and electric forces act at the
>speed of light as well.

I posted a long article on this subject re gravity a little while
ago, but the short answer is that your teacher is right.  There
are some subtleties, but essentially gravitational effects
travel at c, in the sense that if you were to suddenly wiggle 
a system of masses to change the mass distribution, the
effect wouldn't be seen at a distant point until it had
time to travel there at the speed of light.

Magnetic and electric effects travel at the speed of light
as well-- in the classical limit, light can be seen as a
wave made of electric and magnetic fields.  That *doesn't*
mean that the field of a bar magnet consists of photons
traveling outward from the magnet at the speed of light.
It does mean that if you shake the magnet, the effect on
the magnetic field travels outward at c.

>Second, is there an explanation for why photons are the fastest moving
>objects?  What makes it so fast?  Is it small mass? 

Yes-- it's the photon's *zero* rest mass that makes it travel
at c.

-- 
Matt McIrvin, professional gradgrind, amateur Usenet drifter
Organization: Penn State University
Date: Wed, 12 Aug 1992 11:35:29 EDT
From: <RVU@psuvm.psu.edu>
Newsgroups: alt.visa.us
Subject: Who are J-1 sponsors?

I know that academic institutions can issue an IAP-66 for J-1 visa.  My
question is what other organizations/institutions can issue IAP-66?  Please
e-mail to me, and I will post a summary if enough interest from net users
appear.  Thanks in advance for your response.
G. Rauniyar
Newsgroups: alt.visa.us
From: pradeep@bkd.NoSubdomain.NoDomain (Pradeep Deshpande)
Subject: Re: What's the procedure and requirement from B-1 to F-1?
Reply-To: pradeep@bkd.b11.ingr.com
Organization: ISGS, Intergraph Corporation. Huntsville, AL-35894.
Date: Wed, 19 Aug 1992 22:46:53 GMT

In article <1992Aug18.045224.3454@mtu.edu>, ylchang@mtu.edu (CHANG) writes:
|> Hi!
|> 
|>    I have the same question. My sister want to come to the State and get into
|>  a high school. She has already gotten the I-20 from the high school, however,
|>  she couldn't get the F-1 visa. The visa she is holding now is B1/B2. According
|>  to the international student advisor in my school, it is not difficult for
|>  her to transfer B1 to F1 if she can stay here with me for about 6 monthes.
|>  Is staying in the State for 6 monthes with B1/B2 visa leagle or not? Is 
|>  there any one can answer me this question? Thank you very much.

	When she enters the US, she will get an I94 which will decide how long
she will gets to stay in US. If her B1/B2 visa is valid for one year she will 
get to stay for 6 months. If it's six months then the officer might most probably 
give three months. In any case you can always apply for an extension. Depending
on the reasons you can get two extensions of max six months each. So your 
expectations of six months of stay for your sister is realistic. Good Luck.

|> -- Yu-Li Chang  

-- 
-Pradeep.

---------------------------------------------------------------------------
Pradeep Deshpande			    |"The only tyrant I accept in 
Intergraph Corporation. Huntsville, Alabama |this world is the 'still small
INTERNET: pradeep@bkd.b11.ingr.com	    |voice' within me."
UUNET   : ...uunet!ingr!b11!bkd!pradeep	    |	-Mahatma Gandhi (1869-1948)
---------------------------------------------------------------------------
From: rcrane@yoda.eecs.wsu.edu (Robert Crane - OTHER)
Newsgroups: alt.visa.us
Subject: Help needed:  Immigration & Pregnancy
Date: 14 Aug 92 17:44:13 GMT
Organization: Washington State University
Originator: rcrane@yoda.eecs.wsu.edu

My wife, a German citizen, is five months pregnant.  Because
the US does not have a socialized health care system, her
German social insurance will not cover the pregnancy.  So we
went to apply for Medicade and foodstamps as we are both
graduate students and do not have enough money to cover the
costs of a pregnancy and rasing a child.  The Social and
Health services people told us that for my wife and I to get
aid she had to be a legal alien.  So, we went to the
Immigration and Naturalization Service to get her permanent
residence status.  However, one of the requirements for her
to receive this status is that she have a sponsor (me, her
husband) and that this sponsor signs an affidavit of support
stating that the supporter will support the person for 3
years gauranteeing that the alien will not become a "public
charge."  Essentially, as I understand it, she is not
elgible for any health and social services for a period of 3
years eventhough she is married to a US citizen.  As an
alien she would qualify for any emergency medical service,
but if she wishes to reside in the US permanently, she would
have to pay back to the state all costs rendered before
applyimg for permanent residency.

Is this true?  Is there no way around this?  I have a very
difficult time believing that I will have to pocket the
entire cost of the birth.  Also, as I understand it, I as an
individual would not be elgible for foodstamps because
elgibility is based on the persons living in the house.
Thus, because I am married to an alien, I am not elgible for
foodstamps as an individual.  Is this true?

I would greatly appreciate any help available on this
matter.  We just talked to the immigration people today and
all of this is new to me at the moment.

Also, the immigration people stated that we may have
commited "visa fraud!"  Basically, I went to Germany with my
fiancee to meet her parents.  There she was granted a new F-
1 student visa to start her graduate studies.  But because
we had the intention to marry in the US we needed to get a
"Fiancee Visa" and that applying for the F-1 visa was under
false pretenses.  Is this a serious matter?  What should we
do about this?

Last, is there a FAQ somewhere that would answer these
questions?

Desperate:

-- 
-bob crane
rcrane@yoda.eecs.wsu.edu
"Ah Limbo!"
Newsgroups: alt.visa.us
Subject: Green Card
From: blain@vax1.umkc.edu
Date: Wed, 19 Aug 1992 22:51:48 GMT
Organization: University of Missouri - Kansas City

    Green
From: nvw8292@ritvax.isc.rit.edu
Newsgroups: alt.visa.us
Subject: Univ of California - Berkely
Date: 19 Aug 92 14:06:18 GMT
Reply-To: nvw8292@ritvax.isc.rit.edu
Organization: Rochester Institute of Technology

Does anyone know how I can get in touch with the Univ. of California
@ Berkely's campus database.   would like to know more about their graduate
program.  Thank you.
Newsgroups: alt.visa.us
Subject: Green Card
From: blain@vax1.umkc.edu (")
Date: Wed, 19 Aug 1992 23:36:03 GMT
Reply-To: blain@vax1.umkc.edu (")
Organization: University of Missouri - Kansas City

"Newsgroups:"alt.visa.us
Subject: Green Card requirements
Hi: I am a spanish citizen with a J-1 Visa. I have heard that last year the
inmigration law did change, so I really appreciate all the information I
can get about the requirements and all the steps I have to do or to follow
in order to grt a grren card.
I have got my doctoral degree in Biochemistry of proteins, and actually
I am working in the University of Missouri-Kansas City doing site-specific
mutagenesis of proteins.
Thanks a lot in advance.
Blanca Lain
Newsgroups: alt.visa.us
From: amar@Data-IO.COM (Amar Chawla)
Subject: J1
Organization: Data I/O Corporation
Distribution: usa
Date: Fri, 21 Aug 1992 00:42:19 GMT


Hi Friends,

I have a inquiry from a friend of mine-


"Find out about the J1 visa - does it imply that I have to necessarily stay in
India for a year after its expiry. And can it be extended.
(I have heard versions which are not very encouraging)"

Can you folks tell me what a J1 visa is?  He is having trouble getting F-1
in Bombay.  Maybe he is trying to get a J1 visa.  I don't know if thats the
right path.  What sort of problems will he have if he comes on a J1 visa
and tries to convert to F1?

Thanks for help.

amar
amar@Data-IO.COM

Newsgroups: alt.visa.us
From: westbrook-jeffery@CS.YALE.EDU (Jeffery Westbrook)
Subject: Re: Citizen question
Organization: /homes/theory/westbroo/.organization
Distribution: usa
Date: Wed, 12 Aug 1992 10:37:42 GMT

In article <1992Aug11.221108.16974@engage.pko.dec.com>
moroney@ramblr.enet.dec.com writes:

   A friend of mine who is a US citizen is currently engaged to a
   non-US citizen.  Out of curiosity how does marrying my friend
   affect her status/ability to become a citizen? 

If she does not have a green card, then marriage to a US citizen
places her in the 1st preference category for a green card and
essentially means she'll get it in a few months rather than a few
years. Normally a permanent resident is eligible for US citizenship 5
years after getting the green card. A permanent resident married to a
US citizen, however, is eligible for citizenship 3 years after getting
the green card. (This according to a lawyer.)

Jeff
From: srin@cs.utexas.edu (Srinivas Nedunuri)
Newsgroups: alt.visa.us
Subject: Re: Getting a multiple entry H1B visa in London
Date: 20 Aug 1992 18:32:59 -0500
Organization: U Texas Dept of Computer Sciences, Austin TX
NNTP-Posting-Host: cs.utexas.edu

In article <86652@netnews.upenn.edu> caroline@linc.cis.upenn.edu (Caroline Heycock) writes:
>
>I have recently changed jobs and so have gone through the process of
>getting a new H1 visa authorized.  I may be making a very short visit to
>Britain (Friday to Sunday) and so will need to go to the Embassy there
>to get my new visa.  Has anyone done this, and if so, could they let me
>know whether I can be sure of getting this taken care of on the Friday
>that I arrive (my plane is scheduled to arrive around 7.15am).

I have never tried to get an H-1 visa but I had no trouble getting an F-1 in
a day. Best to get there early in the morning (like before 9am) b-cause they
close the doors around 11am I think and there is always a long line there.
You should be done by noon if all goes well :-)
--s;

Newsgroups: alt.visa.us