HDTenEightyP/NetNews huggingface dataset:
From: haferman@icaen.uiowa.edu (Jeff Haferman)
Newsgroups: sci.engr,sci.math.num-analysis
Subject: Can MAPLE do implicit differentiation?
Date: 9 Oct 92 14:45:04 GMT
Article-I.D.: news.1992Oct9.144504.25042
Organization: University of Iowa, Iowa City, IA, USA



In Maple, if I define

  p:=(1+(gam-1)/2*m^2)^(gam/(gam-1));


1) how can I solve for m in terms of gam and p?

2) is there a way to do implicit differentiation, so that I
   can get the derivative of m with respect to p?

[granted, for this problem, I can do all of the above analytically,
 but I haven't been able to figure out how to get Maple to do it ...]


please e-mail if possible!


Jeff Haferman                            internet: haferman@icaen.uiowa.edu
Department of Mechanical Engineering     DoD 0186  BMWMOA 44469  AMA 460140
The University of Iowa
Iowa City, IA  52242                                 '76 R90S
From: raman@pandora.its.uci.edu (Balaji Ramanathan)
Subject: Re: Pyramids on US Television
Newsgroups: sci.engr.civil
Organization: University of California, Irvine
Date: 16 Oct 92 16:43:13 GMT
Distribution: usa

In article <2ADED186.29896@news.service.uci.edu> jaykay@orion.oac.uci.edu (R. Jayakrishnan) writes:
> `This Old Pyramid' on US Television.
>  ----------------------------------
>
>  Ancient Observatories ?  Colossal calculating machines ?  Giant Ouija
>  boards ?  Extraterrestrial public works projects ?   The pyramids have
>  inspired countless theories about their purpose - in addition to the more
>  humdrum but well-founded view that they were royal tombs for the pharoahs.
>  No less creative have been theories on how the pyramids were built. Were 
>  the countless stones comprising the world's most massive ancient structures
>  dragged, rolled, levered, cast in place or assembled by some other ingenious
>  means ?
>
>  In a 90 minute special presentation, NOVA puts the contending ideas to test
>  by constructing a real pyramid on location in Egypt, using conjectured
>  traditional methods in `This Old Pyramid', which airs on Nov. 4 on PBS. 
>  At the start of filming, NOVA's construction site was an empty square of 
>  sand with 189 newly quarried stone blocks lying about. Nearby, the great
>  pyramid of Giza, containing more than 2 million stones, loomed as a daunting
>  inspiration. NOVA had three weeks to build a structure 18 ft high vs. the
>  estimated 23 years that it took to build the Great Pyramid.
>
>-----------------------------------------------------------------
>
> Question:  If the same NOVA crew took 3 weeks for this, they would take
>    30,000 weeks (about 600 yrs) to build the Great pyramid which has 
>    10,000 times the volume ?  Does that mean there were 30 times more
>    workers building the big one in 23 years ? Or is the effort nonlinear
>    in terms of volume ?  
>

	I would imagine that the effort is nonlinear in relation to the
volume of the pyramid.  However, I think your calculations would
actually UNDERESTIMATE the time or amount of labour required for the
project.  Intuitively, I think it would take me greater than 3 times
more time to build a pyramid 15 ft high rather than 5 ft high.

	However, bigger structures may allow more parallel processing
resulting in greater efficiencies.  I will look out for the program.
Thanks for the info.

Balaji Ramanathan
From: v081jwnc@ubvmsb.cc.buffalo.edu (MC Flexible Flyer)
Newsgroups: sci.engr.civil
Subject: Nuclear
Date: 8 Oct 92 13:14:00 GMT
Organization: University at Buffalo
News-Software: VAX/VMS VNEWS 1.41

I agree with previous posts, that we need a nuclear waste site.  We 
also need to pick one reactor design and have that be the one for the 
whole country.  With numerous, small, safe and similar reactors all 
around the country, we could have safe nuclear power.  Of course this 
means getting a site for the waste and picking a reactor design, all 
the while convincing those who don't realize that we will soon run out 
of fossil fuels that nuclear is the only way to go if we want to have 
electricity.  

William
From: jaykay@orion.oac.uci.edu (R. Jayakrishnan)
Subject: Transportation Mailing list
Newsgroups: sci.engr.civil
Organization: University of California, Irvine
Date: 16 Oct 92 15:15:21 GMT



  This is to inform those with interests in transportation that there is
  a mailing list on transportation that you can join for discussions on
  that topic.

  To join the mailing list, send a mail to  LISTSERV@ASUACAD.BITNET (if you
  are on bitnet) or LISTSERV@ASUVM.INRE.ASU.EDU  (otherwise), with a one-line
  message,    SUBSCRIBE TRANSP-L  your-name.

  If you need to get general info on how such a mailing list works, send
  to the same address a one-line message,    INFO 

  This mailing list is rather small now, and has very low activity.  Let us
  have some discussions there.

  Jay

  Dr. R. Jayakrishnan, Civil Engg, Univ of California, Irvine.
From: rsahu@triton.unm.edu (Raikanta Sahu)
Newsgroups: sci.engr.civil
Subject: Re:  Any PC-based structural analysis packages out there.
Date: 15 Oct 92 16:59:47 GMT
Organization: University of New Mexico, Albuquerque

In article <1992Oct14.194948.17053@tamsun.tamu.edu> gagrawal@cs.tamu.edu (Gopal Agrawal) writes:
>
>Dear netters,
>
>A friend of mine in India wants to obtain information
>regarding the currently available "Structural Analysis"
>packages that can be run on IBM-compatibles. Any pointers
>to where I can get such information would be appreciated.
> 
If you are looking for free software, I don't know. If you want to buy,
SAP for IMB-PC compatibles are available for around $6000. 
>
>regards,
>--   
>   ______ ______ ______ ______ __  |\/\/\/|
>    ____/  __  /  __  /  __  /  /  |  \  /|   LIFE'S COMPLEX - IT HAS 
>   / __   /   /  /   /  /   /  /   | (o)(o)   REAL & IMAGINARY PARTS  
>  /   /  /   /   ___/  __  /  /    C      _) 
>_____/ _____/ __/   __/ __/ ______/ | \___|  
>E-mail - gagrawal@cs.tamu.edu       |   /   All Std. Disclaimers apply.
>
> 
Xref: sparky sci.engr.civil:481 sci.engr.mech:432
From: tjgorn01@vulcan.spd.louisville.edu (Tim Gornet)
Newsgroups: sci.engr.civil,sci.engr.mech
Subject: Re: Any PC-based structural analysis packages out there.
Date: 15 Oct 92 17:31:38 GMT
Organization: University of Louisville

I use two different packages, one for pre-post processing and the other for
my analyses. My pre/post processor is FEMAP which runs under both DOS and
Windows 3.1. For my analysis package I use a software called PC NASTRAN from
Thoroughbred Software. I have been very happy with both packages as both have
good capabilities. If you would like anymore info I could dig up my invoices
and give you some names and addresses.
-- 
--------------------------------------------------------------------------
Tim Gornet					PHONENET: (502)588-0714
  Computer Aided Engineering Consultant 	FAXNET  : (502)588-8890 
						SLUGNET:
INTERNET: tjgorn01@starbase.spd.louisville.edu	  CAE Center
BITNET  : tjgorn01@ulkyvx.bitnet         	  University of Louisville
         					  Louisville, KY 40292
--------------------------------------------------------------------------
From: jaykay@orion.oac.uci.edu (R. Jayakrishnan)
Subject: Pyramids on US Television
Newsgroups: sci.engr.civil
Organization: University of California, Irvine
Date: 16 Oct 92 14:28:22 GMT
Distribution: usa


 
 The following is from the ASCE newsletter.  My friend Srinivas from
 UTexas seems to have stopped posting excerpts from it, so I am doing
 it... (Anyone wants to do it regularly ?)

 Jay

 R. Jayakrishnan, Civil Engg, Univ of California, Irvine.
-----------------------------------------------------------------

 `This Old Pyramid' on US Television.
  ----------------------------------

  Ancient Observatories ?  Colossal calculating machines ?  Giant Ouija
  boards ?  Extraterrestrial public works projects ?   The pyramids have
  inspired countless theories about their purpose - in addition to the more
  humdrum but well-founded view that they were royal tombs for the pharoahs.
  No less creative have been theories on how the pyramids were built. Were 
  the countless stones comprising the world's most massive ancient structures
  dragged, rolled, levered, cast in place or assembled by some other ingenious
  means ?

  In a 90 minute special presentation, NOVA puts the contending ideas to test
  by constructing a real pyramid on location in Egypt, using conjectured
  traditional methods in `This Old Pyramid', which airs on Nov. 4 on PBS. 
  At the start of filming, NOVA's construction site was an empty square of 
  sand with 189 newly quarried stone blocks lying about. Nearby, the great
  pyramid of Giza, containing more than 2 million stones, loomed as a daunting
  inspiration. NOVA had three weeks to build a structure 18 ft high vs. the
  estimated 23 years that it took to build the Great Pyramid.

-----------------------------------------------------------------

 Question:  If the same NOVA crew took 3 weeks for this, they would take
    30,000 weeks (about 600 yrs) to build the Great pyramid which has 
    10,000 times the volume ?  Does that mean there were 30 times more
    workers building the big one in 23 years ? Or is the effort nonlinear
    in terms of volume ?
From: ttdfi@lhdsy1.lahabra.chevron.com (Tim D. Finnigan)
Newsgroups: sci.engr.civil
Subject: wave impact pressures
Keywords: slam runup water-jet loads pressures
Date: 8 Oct 92 21:43:13 GMT
Organization: Chevron, La Habra, CA

This "post" is an addendum to my previos post a few minutes ago.
I have a number of references (Melville, Chan, Kjeldsen, Miller) 
which address shock or impact pressures from breaking waves.
However, I am interested in impact from fluid that has "run up" a 
cylindrical column to impart vertical loads on a horizonal plate,
or possibly deflected horizontally to impact beam elements.  I 
thought that their might be someone in a discipline outside of
"Ocean Engineering" who has encountered a similar problem, say 
with sheet flow or flooding effects on beam elements above bridge
piling.  My literature search didn't identify anything in those
areas, but I guess I can keep trying.
Thank you once again.
-- 
 -------------------------------------------------------------------------
   Tim Finnigan, Sr. Research Engineer       Internet:   ttdfi@chevron.com
   Chevron Oil Field Research Company                             
   P.O. Box 446, La Habra, CA 90633-0446                        
Newsgroups: sci.engr.civil,sci.engr.mech
From: gagrawal@cs.tamu.edu (Gopal Agrawal)
Subject: Re: Any PC-based structural analysis packages out there.
Organization: Computer Science Dept., Texas A&M University
Date: Fri, 16 Oct 1992 20:42:23 GMT

Thanks to all those who replied. I got loads of replies.
They were all very helpful.

regards,
Gopal Agrawal
From: ttdfi@lhdsy1.lahabra.chevron.com (Tim D. Finnigan)
Newsgroups: sci.engr.civil
Subject: wave impact loading
Keywords: wave slam runup water-jet loads pressures
Date: 8 Oct 92 21:08:09 GMT
Organization: Chevron, La Habra, CA

Does anyone know of any reference on loads or pressures on beams 
or plates due to wave slam; specifically wave slam or slap caused 
by runup along a cylinder (circular or polygonal cross section)?
I'm interested in loads that may be caused under breaking waves 
or turbulent conditions in which there is significant air entrainment.
Thank you for your help.
-- 
 -------------------------------------------------------------------------
   Tim Finnigan, Sr. Research Engineer       Internet:   ttdfi@chevron.com
   Chevron Oil Field Research Company                             
   P.O. Box 446, La Habra, CA 90633-0446                        
Newsgroups: sci.engr.civil
From: gagrawal@cs.tamu.edu (Gopal Agrawal)
Subject:  Any PC-based structural analysis packages out there.
Organization: Computer Science Dept., Texas A&M University
Date: Wed, 14 Oct 1992 19:49:48 GMT


Dear netters,

A friend of mine in India wants to obtain information
regarding the currently available "Structural Analysis"
packages that can be run on IBM-compatibles. Any pointers
to where I can get such information would be appreciated.

regards,
--   
   ______ ______ ______ ______ __  |\/\/\/|
    ____/  __  /  __  /  __  /  /  |  \  /|   LIFE'S COMPLEX - IT HAS 
   / __   /   /  /   /  /   /  /   | (o)(o)   REAL & IMAGINARY PARTS  
  /   /  /   /   ___/  __  /  /    C      _) 
_____/ _____/ __/   __/ __/ ______/ | \___|  
E-mail - gagrawal@cs.tamu.edu       |   /   All Std. Disclaimers apply.

 
Newsgroups: sci.engr.civil,sci.engr.mech
From: thimm@nostromo.ira.uka.de (Georg Thimm)
Subject: Re: Any PC-based structural analysis packages out there.
Organization: Mantafahrer Anonym
	<1992Oct15.051902.27928@tamsun.tamu.edu>
Date: Fri, 16 Oct 1992 20:21:50 GMT


I'm currently developing a package allowing to compare 2 crystal
structures on the base of graph theorie. 
Input: The lattice and related information (for example from x-ray
analysis) 
Output: Graph theoretical stuff like coordinate sequences and cycle
spectra which allow some heuristic comparison.

I'its working under unix and  I'll move it to PC.
If you want it: Send a mail.
If you have samples to test now: Send a mail.

	Georg
--




*****************************************************************
Georg Thimm, Schwarzwaldstr. 52, W-7128 Trossingen 1, Deutschland
E-Mail: thimm@ira.uka.de
Newsgroups: sci.engr.civil
From: changl@ecf.toronto.edu (CHANG LI)
Subject: Digitizer in autoCad
Organization: University of Toronto, Engineering Computing Facility
Date: Wed, 14 Oct 1992 01:13:25 GMT

Hi,

I am going to be a new user of autoCAD.
I intend on using the TABLET MENU with a digitizer and a puck.
I have a few questions maybe you could help me.


1) Does the TABLET MENU come with the autoCAD softwear?
   So if I have a digitizer then I can use the TABLET MENU?  True/False?

2) There is such a thing as a template, is it simply a piece of paper
   that I can color photocopy?

3) I have asked around in the computer stores around Spadina and College.
   The prices are $475 for a large digitizer with puck, no template
		  $450 Summasketch II plus 12x12 digitizer, no template
		       with puck
		  $239 9x6 inch digitizer with template.

   How do these prices sound?


All comments and suggestions are greatly appreciated.
I intend on using autoCad to do mechanical drawings.

Is there a 1-800 number I could call about autoCad?  Customer service?

Thank you.



      Li Chang   Comp Eng 9T4                     ____
  First Class of Computer Engineering            /_|__\--,
     @ the University of Toronto           []Oo. `0-----0'

     changl@ecf.toronto.edu
-- 



      Li Chang   Comp Eng 9T4                     ____
Xref: sparky sci.engr.civil:480 sci.engr.mech:431
From: gagrawal@cs.tamu.edu (Gopal Agrawal)
Newsgroups: sci.engr.civil,sci.engr.mech
Subject: Any PC-based structural analysis packages out there.
Date: 15 Oct 92 05:19:02 GMT
Article-I.D.: tamsun.1992Oct15.051902.27928
Organization: Computer Science Dept., Texas A&M University


Dear netters,
 
 A friend of mine in India wants to obtain information
 regarding the currently available "Structural Analysis"
 packages that can be run on IBM-compatibles. Any pointers
 to where I can get such information would be appreciated.
 
regards,
--   
   ______ ______ ______ ______ __  |\/\/\/|
    ____/  __  /  __  /  __  /  /  |  \  /|   LIFE'S COMPLEX - IT HAS 
   / __   /   /  /   /  /   /  /   | (o)(o)   REAL & IMAGINARY PARTS  
  /   /  /   /   ___/  __  /  /    C      _) 
_____/ _____/ __/   __/ __/ ______/ | \___|  
E-mail - gagrawal@cs.tamu.edu       |   /   All Std. Disclaimers apply.
 
  
Newsgroups: sci.engr
From: rizzo@cbnewsf.cb.att.com (anthony.r.rizzo)
Subject: unducted fan project
Keywords: what's the status?
Organization: AT&T
Distribution: usa
Date: Thu, 8 Oct 1992 16:24:18 GMT

Does anyone from NASA know what happened to the undected fan project?
Does anyone know whom I can contact for a status report?  A name
and telephone number would be very much appreciated.

Tony Rizzo  (att.com!hogpb!rizzo)
From: eechris@cybaswan.UUCP (Chris Jobling)
Newsgroups: sci.engr
Subject: Re: Definition needed: Control Engineering
Date: 15 Oct 92 14:54:42 GMT
X-Newsreader: Tin 1.1 PL3

E59140@TRMETU.BITNET writes:
: Hi,
: 
: Can any of you control engineers out there supply me with a layman
: definition of the profession?  I myself have taken courses in the
: subject but I need to have a definition to give people from a non-
: technical background; a text book one, of which I have several, will
: not do. Please e-mail to avoid cluttering the newsgroup.
: 
: Thanx in advance,
: 
: Neyir Cenk Gokce
: 
I suggest that you post a copy of this request in sci.engr.control.
That's a newsgroup which is for discussions concerned with control
engineering. The readers of that might be able to give you a definition.
My definition of control? Like you, I get stuck when asked to explain
what it is I do and teach. My first instinct is to start talking
about systems ... but what's a system?

Chris

-- 
\     Chris Jobling, Department of Electrical and Electronic Engineering,      /
 \      University College, Swansea, Singleton Park, Swansea SA2 8PP, UK      / 
  \                   email: eechris@pyr.swan.ac.uk                          /  
   \-------------Phone: +44-792-295580 Fax: +44-792-295686------------------/
Organization: Middle East Technical University - Computer Center
Date: Monday, 12 Oct 1992 13:05:54 TUR
From: <E59140@TRMETU.BITNET>
Newsgroups: sci.engr
Subject:    Definition needed: Control Engineering

Hi,

Can any of you control engineers out there supply me with a layman
definition of the profession?  I myself have taken courses in the
subject but I need to have a definition to give people from a non-
technical background; a text book one, of which I have several, will
not do. Please e-mail to avoid cluttering the newsgroup.

Thanx in advance,

Neyir Cenk Gokce

Middle East Technical University
Department of Mechanical Engineering
Ankara / Turkey
From: tylerh@cco.caltech.edu (Tyler R. Holcomb)
Newsgroups: sci.engr
Subject: Re: Definition needed: Control Engineering
Date: 14 Oct 1992 17:18:08 GMT
Organization: California Institute of Technology, Pasadena
NNTP-Posting-Host: punisher.caltech.edu

kfseefel@mtu.edu (KURT F. SEEFELDT) writes:

>In article <92286.130554E59140@TRMETU.BITNET> <E59140@TRMETU.BITNET> writes:


>>Can any of you control engineers out there supply me with a layman
>>definition of the profession?  I myself have taken courses in the
>>subject but I need to have a definition to give people from a non-
>>technical background; a text book one, of which I have several, will
>>not do. Please e-mail to avoid cluttering the newsgroup.
>>

>A discussion of this on the net would help.

Okay - here is my $0.02

1.  Using computers to make machines work better.

2.  Making manufacturing more efficient without REPLACing
the EQUIPMENT.

As you can see, I do *process* control; I suspect our
friends in aerospace and electrical engineering  will
find these descriptions too narrow and/or inappropriate
for their work.





-- 
---------------------------------------------------------------------------
Tyler Holcomb   *   "Remember, one treats others with courtesy and repsect *
tylerh@juliet   *   not because they are gentlemen or gentlewomen, but     *
  caltech.edu   *   because you are."  - paraphrased from Garth Henrichs   *
From: engp2055@nusunix1.nus.sg (VINOD UDHARAM VASNANI)
Subject: Room Sharing for CDC'92
Organization: National University of Singapore
X-Newsreader: TIN [version 1.1 PL6]
Date: Thu, 8 Oct 1992 07:39:41 GMT



Room Sharing for CDC'92
=======================

Looking for a male roomate to share a double room  for the IEEE Conference on
Decision and Control 1992 (CDC '92) to be help at, Tucson Arizona in
December. 
Anyone interested please reply by email.

Vasnani Vinod U
engp2055@nusunix1.nus.sg
PhD candidate
Department of Electrical Engineering
National University of Singapore

Newsgroups: sci.engr
From: kfseefel@mtu.edu (KURT F. SEEFELDT)
Subject: Re: Definition needed: Control Engineering
Organization: Michigan Technological University
Date: Wed, 14 Oct 1992 02:46:15 GMT

In article <92286.130554E59140@TRMETU.BITNET> <E59140@TRMETU.BITNET> writes:
>Hi,
>
>Can any of you control engineers out there supply me with a layman
>definition of the profession?  I myself have taken courses in the
>subject but I need to have a definition to give people from a non-
>technical background; a text book one, of which I have several, will
>not do. Please e-mail to avoid cluttering the newsgroup.
>

A discussion of this on the net would help. This information could
help many of us who can't seem to get the idea across to laymen without
sounding silly or aloof. We need to define what we do in a non-technical
language and this is as good a place as any.

Sorry, I do not have a good definition of control engineering.....yet.

 - Kurt <kfseefel@mtu.edu>

Newsgroups: sci.engr
From: gooch@leland.Stanford.EDU (Carl Gooch)
Subject: Re: Chemically Reacting Air
Organization: DSG, Stanford University, CA 94305, USA
Distribution: usa
Date: Thu, 8 Oct 92 18:12:09 GMT

In article <1992Oct8.002254.20216@math.ucla.edu>, rfedkiw@redwood.math.ucla.edu (Ronald Fedkiw) writes:
|> I'm trying to model the flow of high temperature air.......
|> I need to calculate the heat of formation of: N2 O2 N O NO NO+ e-
|>                         ^^^^^^^^^^^^^^^^^
|> Anyone know what to do ??? References ????

If you're calculating the flow of equilibrium high temperature air, the 
JANAF tables should do nicely for heat of formation and whatever else 
you might need, as others have said.  

If you're trying to model non-equilibrium air with finite reaction rates, 
the task is a bit more daunting.  I'd recommend that you start with Graham 
Candler's 1988 Stanford PhD thesis if you can find it, and papers by him 
starting around that time if you can't get the thesis.  In either case, 
you'll immediately be armed with information about how to deal with a 
variety of implementation issues (which you may or may not need) and with 
a large flock of references, including references to a set of reactions 
and rates (due to Jachimowsky, I believe) that have been shown by Candler 
and others to be reasonably accurate.  (NB:  Xiao-Lin Zhong, a newly minted 
junior faculty member in the UCLA AA department, is also from Stanford and 
could conceivably have a copy of Graham's thesis.)

Carl

-- 
Carl Gooch                     |      Confidence:  The feeling you get just
gooch@leland.stanford.edu      |      before you discover you're wrong.
Newsgroups: sci.engr,sci.engr.mech,sci.research,sci.math.num-analysis
From: perwaiz@gfx.engga.uwo.ca (Jim Perwaiz)
Subject: VORTEX SHEDDING GFREQ. _ FFT (SUMMARY)
Organization: University of Western Ontario, London
Date: Fri, 9 Oct 1992 18:32:20 GMT

Here is the summary of the responses on how to get a 
better FFT plot.

1. Wind tunnel should be stable.
2. Use windowing.
3. Put the hot-wire out of the wake of the cylinder.
4. Use and improve analog anti-aliasing filters.
5. Sample at at least 10 times the expected frequency.
6. A good reference on windowing: " On the use of windows for
   harmonic analysis with the discrete fourier tranform",
   Proc. of the IEEE, vol 66, no 1, jan 1978.

7. Instead of the FFT try the "max. entropy spectra"
   method - Numerical Recipes has a write-up.

8. My own: read the ILS software manual again !!!


I hope this meets the requests of some people. 


Once again, my THANKS to everyone for their great help
and interest.  My apologies for posting this summary so late.

Good bye

-- 
-----------------------------------------------------------------
Jamshed Perwaiz                      |perwaiz@engrg.uwo.ca
Department of Mechanical Engineering |perwaiz@gfx.engga.uwo.ca  
The University of Western Ontario    |
Xref: sparky sci.engr:2127 sci.energy:4895