HDTenEightyP/NetNews huggingface dataset:
From: gkwan@balboa.eng.uci.edu (Greg Kwan)
Subject: NSPE
Newsgroups: sci.engr
Organization: University of California, Irvine
Date: 29 Jul 92 00:23:05 GMT
Distribution: usa

Is anyone here a member of the National Society of Professional
Engineers (NSPE)? Any opinions of it?

I am currently a grad student in electrical/computer engineering
and am a student member of the IEEE. After passing my E-I-T exam
I received an invitation to join the NSPE, but I "filed" it be-
fore really considering it (I was also working at the time and
didn't think it was worth the cost). Now, as I near my eligibil-
ity for taking the PE exam, I think it is worth considering. Al-
so, I think they had low cost student memberships available. 

I vaguely remember reading in _EE Times_ about IEEE vs. NSPE bat-
tles. I am definitely for a professional engineering group which
promotes all engineering and not just specialties. Whether or not
registration should be required is another matter--I am personally
for it, but realize that it'd be almost impossible to implement.

greg
gkwan@balboa.eng.uci.edu
Newsgroups: sci.engr
From: tyadav@athena.mit.edu (Tapesh Yadav)
Subject: Re: Can engineering be automated?
Organization: Massachusetts Institute of Technology
Date: Thu, 30 Jul 1992 14:14:09 GMT

========================================
 fil@me.utoronto.ca (Filippo A. Salustri) writes:
>>myers@hpfcso.FC.HP.COM (Bob Myers) writes:
>>Now, is anyone sufficiently tired of stating two of the possible answers to
>>this question so as to give REASONS for their answers?
>
>	People giving reasons are also encouraged to preface them with some
>definition of engineering (and/or engineering design).  Most of the dispute
>arises from our various *differing* definitions.
>

 Definition/Description :  
	 Engineering is one of the intellectual means to 
	  -  identify, comprehend and eliminate misery
		(medical engg, pharmaceuticals etc.)
	  -  identify, comprehend and solve problems (sustain happiness)
		(production engg, maintenance..)
	  -  create value and happiness
		(optimization, synthesis, concept development...)
	  -  explore and understand the unknowns/universe/..
		(develop design theories;focus telescope for 
		 polyacetylenes in space...)

 The degree to which engineering can be automated is proportional
 to: (a) how well that aspect of engineering is understood (b) whether
 the tools have been developed. 

 What we don't understand yet (and hence can't automate):
	Identification of problems (don't confuse with sensors/control engg)
	Comprehending the problems
	Defining what is value
	Exploration

 What we do understand, to varying degrees (and can automate):
	Solving a defined problem
	
 Since we are evolving organisms, our means (engineering e.g.) will also
 evolve. And so would: whats next to automate? Endlessly.

 Did I miss something?

T.Y.
----
tyadav@athena.mit.edu
From: JRBANGA@poppy.ucdavis.edu (JULIO RODRIGUEZ BANGA)
Newsgroups: sci.engr.chem
Subject: Choice of optimization methods
Date: 21 Jul 92 21:09:58 GMT
Organization: University of California, Davis
X-News-Reader: VMS NEWS 1.20


 Hi there.

  There is a huge amount of literature reporting the solution of optimization
problems using genetic algorithms and direct search optimization methods (like
the Complex from Box) that are more or less 'stochastic'.
 
 I'm myself a user of this type of methods because they are usually easy to
work with and, more important, they usually work well, if you don't mind CPU 
time very much. 

 However, these methods are usually regarded as 'politically incorrect', and
considered as 'inferior' when compared with, for example, SQP (sequential
quadratic programming) and gradient methods. For those interested, see the
comments of Dr. Sargent in the book 'Foundations of computer-aided process
design', edited by Sirola, Grossman and Stephanopoulos, CAChE-Elsevier, 1990.

 Though my work deals with optimization, I'm not an expert in the field, so I'd
like to receive opinions about the pros and cons of GA and direct search
methods when compared with 'politically correct' algorithms. Particularly, 
if those methods are 'incorrect', why are they so widely used?.

    Thanks in advance,

                               Julio.

==========================================================================
  Julio R. Banga                   ! Internet: <jrbanga@poppy.ucdavis.edu>
  University of California, Davis  ! Phone   :  916 752 8144
==========================================================================
Newsgroups: sci.engr.chem
From: kwg@creare.COM (Kent Goeking)
Newsgroups: sci.engr.chem,sci.chem,sci.materials
Subject: Wetting agents
Date: 20 Jul 92 13:09:18 GMT
Reply-To: kwg@creare.UUCP (Kent Goeking)
Followup-To: sci.engr.chem
Organization: Creare Inc., Hanover, NH


     I need some help in how to go about adjusting the wetting properties of a
     fluid.  I am trying to spin coat a glass substrate with a metalorganic
     solution dissolved in the solvent 1-Methylpyrrolidone.  The problem is
     that the solvent beads up on glass and forms streaks rather than a smooth
     coating when spun at high rpm.  I have found that using a different
     solvent such as Tolulene greatly improves the coating quality but for
     other reasons I want to stick with 1-Methylpyrrolidone.

     Can anyone tell me how I can adjust the wettability of this solvent?
     Seems like from my experience with photography and film processing that
     there are additives that will significantly decrease the surface tension
     of liquids.  I would appreciate any hints or suggestions on how to
     proceed.  

                  Thanks


-- 
^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~^~
Kent Goeking (kwg@creare.com)| "We are continually faced with a series of
Creare Inc., P.O. 71         |  opportunities brilliantly disguised as
Hanover, New Hampshire 03755 |  insoluble problems"  - John W. Gardner
From: millere@frith.msu.edu
Newsgroups: sci.engr.mech
Subject: stats software for anthropometry
Date: 28 Jul 92 14:08:44 GMT
Distribution: usa
Organization: Michigan State University, College of Engineering
Originator: millere@frith.egr.msu.edu

We are doing anthropometric measurements of human subjects
related to biomechanics.

Does anyone know of a Public Domain/FTP site program that will
do the summary statistics for our samples and is relatively easy
to use?
Newsgroups: sci.engr.mech
From: jkhodada@eng.auburn.edu (Jay M Khodadadi)
Subject: Re: Russian textbooks in Engineering & Applied M
Reply-To: jkhodada@eng.auburn.edu
Organization: Auburn University Engineering
Date: Wed, 29 Jul 1992 19:23:50 GMT

Try the Progress or Progressive Bookstore in Toronto, Ontario, CANADA.  I do have a receipt from them for a bunch of books I bought recently.  If you can not locate them by checking the telephone directory, send a message and I will get you the info.

You better move fast, since they were talking of liquidating their book holdings, in view of the recent developments in the former SU.

Good Luck
JMK


Newsgroups: sci.engr.mech
From: luj@ecn.purdue.edu (John Lu)
Subject: Re: Is there a continuity equation in elasticity
Reply-To: luj@ecn.purdue.edu
Organization: Purdue University Engineering Computing Network
Date: Sat, 25 Jul 1992 22:13:03 GMT

In article <14qp5fINNoqg@agate.berkeley.edu>, jtrsmith@garnet.berkeley.edu writes:
|> Subject: Is there a continuity equation in elasticity?
|> Hi, 
|> I have a question on the governing equations of solid mechanics:
|> Do we have continuity equation of mass in solid mechanics?

Yes, by the law of the conservation of mass. 

|> Or it is not necessary, or is it implied in other governing equations?
|> 

However, in _solid_ mechanics the mass does not flow away 
and one usually keep track of all the particles(Lanrangian method), 
the "continuity" eqn in the sense of fluid mechnics is trivially satisfied.
In other words, it is not necessary to explicitly establish the trivial
continuity equation in solid mechanics.

-- 
-- John Lu 
   luj@ecn.purdue.edu
From: kevins@hpspdla.spd.HP.COM (Kevin G Smith)
Date: Thu, 30 Jul 1992 16:49:02 GMT
Subject: Counterbalanced Positioning Tool Arms??
Organization: HP Stanford Park - Palo Alto, CA
Newsgroups: sci.engr.mech

Hello,

I am looking for manufacturers who sell what are variously called 
positioning arms, suspension arms, or tool support arms.  These often look
like the "dumb" part of a robot arm.  The most common application we might
all be familiar with is the dentists tool positioning arm which contains
vacuum/water lines, and drill power cabling and control.  The dentist can
conveniently pull in his tool tray or move it out of the way as
circumstance require.  I am interested in suspension arms which could
carry cabling internally. So far I have learned of:
(1) Rose Enclosures (Frederick. MD) - suspension arm system  
(2) McMaster-Carr Supply Company (Los Angeles, CA) - tool and extension
arm systems
Does anybody know of any others?  Thanks in advance for your help.

Cheers,
Kevin

*******************************************
* Kevin G. Smith                          *
* Phone: (415) 857-3423                   *
* Email: kevins@hpspd.hp.com              *
*******************************************
Newsgroups: sci.engr.mech
From: hbudiman@athena.mit.edu (Haryanto T Budiman)
Subject: good textbooks in rigid body dynamics
Keywords: dynamics
Organization: Massachusetts Institute of Technology
Date: Wed, 22 Jul 1992 01:15:29 GMT

Hai !

I was just wondering if you could give me a list of good rigid body dynamics
textbooks.

I am a graduate student, and I would like to help a friend who will become
a sophomore this coming Fall.

Thanks

H.T. Budiman
Newsgroups: sci.engr.mech
From: sspatter@netcom.com (Samuel Scott Patterson)
Subject: Water Transistor?
Date: Mon, 27 Jul 92 19:16:01 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 

Hi.

     I've been doing a bit of tinkering at home and I got to thinking
about machine a simulated digital computer out of analog parts...
moreso, mechanical parts.  Instead of electricity, it would use
running water.  I've figured out how to do most of the
things needed, capacitators, resistors, trnasformers, diodes, etc,
but I don't have a clear idea of how to simulate transistors.
I'm trying to make it with as few mechanical parts as possible.
addimittedly, some valve doors in the diodes and loose pivots
under the capacitator models and such like that but no heavily
technical stuff.  At any rate, any thoughts would be appreciated.

						-Scott

---------------------------------------------------------------------
sspatter@netcom.netcom.com
Samuel Scott Patterson  365-J Western Drive, Santa Cruz CA 95060
(408)459-6790
---------------------------------------------------------------------
From: jkonghsu@ocf.berkeley.edu (James Kong Hsu)
Newsgroups: sci.engr.mech
Subject: Top Ten Engineering Schools from Newsweek
Date: 28 Jul 1992 21:59:30 GMT
Organization: University of California, Berkeley
NNTP-Posting-Host: planecrash.berkeley.edu
Summary: List from May 1992

Followup-To: 
Distribution: sci.engr.mech,soc.college,soc.college.grad
Organization: U.C. Top Ten
4. Michigan
5. Texas A&M
6. U.C. Berkeley
3. Georgia Tech         
8. Stanford
9. RPI, New York
10. U. of Illinois

Newsgroups: sci.engr.mech
From: rth@MV3600.BMEN.TULANE.EDU
Subject: Re: Nodal force calculations in a FE analysis
Nntp-Posting-Host-[nntpd-22892]: mv3600.bmen.tulane.edu
Reply-To: rth@MV3600.BMEN.TULANE.EDU
Organization: TULANE, BMEN, NEW ORLEANS, LA
Date: Fri, 24 Jul 1992 14:00:37 GMT

Remember, in a ststic analysis, the sum of forces at each node = 0,
or the system is not in equilibrium!

__Rich
RTH@BMEN.TULANE.EDU           Richard T. Hart, Ph.D.        (504)865-5889
                              Associate Professor       FAX:(504)862-8779
                              Department of Biomedical Engineering
                              Tulane University
                              New Orleans, Louisiana 70118
Newsgroups: sci.engr.mech
From: hbudiman@athena.mit.edu (H.T. Budiman)
Subject: Dynamic Fracture & Finite Element Package
Keywords: Dynamic Fracture & Finite Element Package
Organization: Massachusetts Institute of Technology
Date: Sun, 26 Jul 1992 14:21:44 GMT

I was wondering if anybody knows any commercial finite element package that
can perform dynamic fracture mechanics analysis (model the dynamic of the
propagating crack).

Thanks for the info

H.T. Budiman
From: jtrsmith@garnet.berkeley.edu ()
Newsgroups: sci.engr.mech
Subject: Is there a continuity equation in elasticity
Date: 25 Jul 1992 05:34:39 GMT
Organization: University of California, Berkeley
Distribution: world
NNTP-Posting-Host: garnet.berkeley.edu
Originator: jtrsmith@garnet.berkeley.edu

Subject: Is there a continuity equation in elasticity?
Hi, 
I have a question on the governing equations of solid mechanics:
Do we have continuity equation of mass in solid mechanics?
Or it is not necessary, or is it implied in other governing equations?

If possible, please reply to this account. Thanks.

JTR Smith
From: natarsu@mse.ogi.edu (N. Sukumar)
Newsgroups: sci.engr.mech
Subject: Nodal force calculations in a FE analysis
Date: 24 Jul 92 09:27:38 GMT
Article-I.D.: ogicse.40490
Distribution: world
Organization: Oregon Graduate Institute, Material Science & Engineering


	Hi!  I hope the solution to what follows turns
out to be simple.

	I am interested in computing the nodal forces
(not the reactions !) at certain nodal points in my
FE analysis; am performing a structural analysis (static)
with quadratic isoparametric elements.  As far as I
know, the system (ANSYS) does not give me the nodal
values.  Is there a simple way (via calculations) or
by a re-analysis (submodel ?) to accomplish the above
task.

	I was contemplating on starting from 1st
principles: assume a quadratic variation over
the element edge for the stresses, and then use
the basic definitions of the nodal forces in
terms of the elemental shape functions and stresses
to set-up a simultaneous eqn. relating the coefficients 
in the stress-expansion and the nodal forces.  Since I know 
the coefficients (the nodal stresses are known), I
can compute the unknown forces.  Is this OK ?  Anyway,
I reckon I'm off on a tangent ...... I'm definitely
missing something !

	Any help/pointers will be appreciated.

Thanks in advance.
-suku.
--
N. Sukumar                   Home Phone: (503)-690-3097
Department of MS&E           Work  "   : (503)-690-1121 (X7451)
Oregon Graduate Institute      ****** BLAZERS IN 1993 ******
From: slv42@cc.usu.edu
Newsgroups: sci.engr.mech
Subject: Re: Water Transistor?
Date: 28 Jul 92 18:58:34 MDT
Organization: Utah State University

Why not use suft tubing (surgical tubing) with a lever that pinches it off?

                           |  |  supply
                           |  |
                        __ |  |
    control    ________/  ||  ||
               ________   ||  ||  
                       \__||  ||  
                     /     |  |
     bladder pushing       |  |
     on lever              |  |  output


looking in the output:    o
                          | __ |
                          ||__||
                       __ |    |
                ______/  ||
                ______   ||
                      \__||

This has the advantage of not wasting the water when off.
Instead if a blader you might be able to use a plunger that slides inside the 
tubing.  
I suppose if the bladder were bigger than the tube, you wouldn't need the 
lever.  
I hope you can come up with something that works!

Eric Poulson           slv42@cc.usu.edu
From: brent@cco.caltech.edu (Brent R. Eubanks)
Newsgroups: sci.engr.mech
Subject: Re: Truss design software
Date: 24 Jul 92 03:30:32 GMT
Organization: California Institute of Technology, Pasadena

campbell@leonardo.src.honeywell.com (Jim Campbell 7644) writes:


>Hello,

>I am looking for a public domain or shareware/inexpensive program which will
>run on a DOS type machine and can be used to design trusses for small
>buildings.  I am able to use FTP.

>Standard methods (archie, comp.sources.*) have not produced anything of value.

>Does anyone know of anything out there?

>Thanks in advance,

>Jim Campbell
>campbell@leonardo.src.honeywell.com


Please send me any info on this as well.

Thanks

-- 
Brent Eubanks                "The meek shall inherit the Earth --
brent@cco.caltech.edu         The rest of us will go to the stars." -- R.H.
--
From: mech413@csc.canterbury.ac.nz
Newsgroups: sci.engr.mech
Subject: MRP Packages
Date: 30 Jul 92 00:35:46 +1200
Organization: University of Canterbury, Christchurch, New Zealand

Hi,

	I am looking for information on computer based MRP packages that 
are on the market. If anyone has any experience or advice on what is out 
there the information would be greatly appreciated. 

If this news group is inappropriate then advice on where this sort system is 
discussed would also be helpful.

Thanks in advance

Tim Pierre 

-- 

*******************************************************************************
* Tim Pierre                        *   "Reality is such a difficult          *
* University of Canterbury          *                 concept"                *
* Mechanical Engineering Dept.      *                                         *
* Christchurch                      *  EMAIL ADDRESS:                         *
* New Zealand                       *        MECH413@csc.canterbury.ac.nz     *
*******************************************************************************
Newsgroups: sci.engr.mech
From: rizzo@cbnewsf.cb.att.com (anthony.r.rizzo)
Subject: Re: Nodal force calculations in a FE analysis
Organization: AT&T
Date: Fri, 24 Jul 1992 17:38:27 GMT

In article <40490@ogicse.ogi.edu> natarsu@mse.ogi.edu (N. Sukumar) writes:
>
>	Hi!  I hope the solution to what follows turns
>out to be simple.
>
>	I am interested in computing the nodal forces
>(not the reactions !) at certain nodal points in my
>FE analysis; am performing a structural analysis (static)
>with quadratic isoparametric elements.  As far as I
>know, the system (ANSYS) does not give me the nodal
>values.  Is there a simple way (via calculations) or
>by a re-analysis (submodel ?) to accomplish the above
>task.
>
>	I was contemplating on starting from 1st
>principles: assume a quadratic variation over
>the element edge for the stresses, and then use
>the basic definitions of the nodal forces in
>terms of the elemental shape functions and stresses
>to set-up a simultaneous eqn. relating the coefficients 
>in the stress-expansion and the nodal forces.  Since I know 
>the coefficients (the nodal stresses are known), I
>can compute the unknown forces.  Is this OK ?  Anyway,
>I reckon I'm off on a tangent ...... I'm definitely
>missing something !
>
>	Any help/pointers will be appreciated.
>
>Thanks in advance.
>-suku.
>--
>N. Sukumar                   Home Phone: (503)-690-3097
>Department of MS&E           Work  "   : (503)-690-1121 (X7451)
>Oregon Graduate Institute      ****** BLAZERS IN 1993 ******


ANSYS does provide nodal forces, and much more.

ANSYS release 4.4A+ has the following commands for that purpose:

     prefor  -  Prints element nodal forces and moment for
                the selected elements.

     fsum    -  sums the element forces at a node.

ANSYS release 5.0 adds the following command:

     prnld   -  prints summed element nodal loads (forces, moments, ...)


  =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  * Anthony R. Rizzo, P.E.     |                                          *
  * The FEA Group              |    Latest republican campaign slogan:    *
  * AT&T Bell Laboratories     |                                          *
  * att.com!homxc!rizzo        |   "George Bush, only four more years!"   *
  * (201) 386-2565             |                                          *
  =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
From: hatay@spot.Colorado.EDU (Ferhat F. Hatay)
Newsgroups: sci.engr.mech
Subject: Re: Is there a continuity equation in elasticity
Date: 26 Jul 92 17:58:35 GMT
Organization: University of Colorado, Boulder

In article <1992Jul25.221303.15864@noose.ecn.purdue.edu> luj@ecn.purdue.edu writes:
>In article <14qp5fINNoqg@agate.berkeley.edu>, jtrsmith@garnet.berkeley.edu writes:
>|> Subject: Is there a continuity equation in elasticity?
>|> Hi, 
>|> I have a question on the governing equations of solid mechanics:
>|> Do we have continuity equation of mass in solid mechanics?
>
>Yes, by the law of the conservation of mass. 
>
>|> Or it is not necessary, or is it implied in other governing equations?
>|> 
>
>However, in _solid_ mechanics the mass does not flow away 
>and one usually keep track of all the particles(Lanrangian method), 
>the "continuity" eqn in the sense of fluid mechnics is trivially satisfied.
>In other words, it is not necessary to explicitly establish the trivial
>continuity equation in solid mechanics.
>
>-- 
>-- John Lu 
>   luj@ecn.purdue.edu

In mechanics the conservation of mass principle 
can be expressed as "local" conservation of mass to 
be valid for every volume element. 
If we consider a volume element going through some 
deformation, it is possible to relate the density change
in the volume element to the invariants of the strain tensor. 
(see Mechanics of Continua, C. Eringen). So one has
to introduce the assumption of zero-dilatation (no-volume-change)
to make this relation trivial (certainly some other assumptions, 
as well.) However, this is not so possible 
when playing with elastic, hyperelastic materials and certainly
with fluids. 


-- 
Ferhat F. Hatay                        || Disclamer: |||||||||||||||||
Aerospace Engineering Sciences         || I speak for myself unless || 
University of Colorado, Boulder        || otherwise indicated.      ||
e-mail: hatay@spot.colorado.edu        |||||||||||||||||||||||||||||||
From: natarsu@mse.ogi.edu (N. Sukumar)
Newsgroups: sci.engr.mech
Subject: Problem solved (Re: Nodal force calculations in a FE analysis)
Date: 25 Jul 92 00:46:35 GMT
Organization: Oregon Graduate Institute, Material Science & Engineering

In article <cbfsb.1992Jul24.173827.11044>,
rizzo@cbnewsf.cb.att.com (anthony.r.rizzo) writes :-
 
> In article <40490@ogicse.ogi.edu> natarsu@mse.ogi.edu 
> (N. Sukumar) writes:
> 
> >	I am interested in computing the nodal forces
> >(not the reactions !) at certain nodal points in my
> >FE analysis; am performing a structural analysis (static)
> >with quadratic isoparametric elements.  As far as I
> > ...[rest deleted]
> >Thanks in advance.
> >-suku.
> 
> ANSYS does provide nodal forces, and much more.
> ANSYS release 4.4A+ has the following commands for that purpose:
>      prefor  -  Prints element nodal forces and moment for
>                 the selected elements.
> 
>      fsum    -  sums the element forces at a node.

	Sorry for the delay in posting ... the problem
is solved !  I was aware of the above "features" on
ANSYS.  All it took was to select the node of interest
along with the elements attached to it (above the plane
of interest).  A "spoint,node #" followed by a
"fsum" gave me the required forces acting on the node
from the structure below it !

	Just mentioned the above in case someone else
too has a need to compute nodal forces sometime ....

	Thanks to all those who posted and also to
those who sent email msgs. to me directly.

> ANSYS release 5.0 adds the following command:
>      prnld   -  prints summed element nodal loads (forces, 
>                 moments, ...)
> Anthony R. Rizzo, P.E.

-suku.
--
N. Sukumar                   Home Phone: (503)-690-3097
Department of MS&E           Work  "   : (503)-690-1121 (X7451)
Oregon Graduate Institute      ****** BLAZERS IN 1993 ******