HDTenEightyP/NetNews huggingface dataset:
From: tony@daops6.scg.hac.com (Tony Wong)
Newsgroups: sci.engr.mech
Subject: Junction to Case Thermal Resistance Database
Keywords: Theta-jc, Thermal Resistance
Date: 26 Jan 93 20:57:45 GMT
Reply-To: ktwong@igate1.hac.com (Anthony Wong)
Organization: Hughes Aircraft Co., Tucson, AZ


Greetings,

I am in search of databases with junction to case thermal resistance
values (Theta-jc) for both common and exotic electronic components 
currently in use.  I am interested in values for a variety of packages,
including DIPs, circular can packages (the TO-X series), MPAKs, QPAKs,
LCCs, etc.

Please email me at ktwong@igate1.hac.com if you have any or can suggest
where to look for these databases.

Thank You
Anthony Wong

-- 
---------------------------------------------------------------------------
Anthony K.T. Wong, Hughes Missile Systems Company, ktwong@igate1.hac.com  |  
---------------------------------------------------------------------------
(Opinions expressed are mine, not my employers')
Newsgroups: sci.engr.mech
From: kotsonis@owlnet.rice.edu (Spyro Joseph Kotsonis)
Subject: Marine Engine help needed
Organization: Rice University
Distribution: usa
Date: Mon, 25 Jan 1993 19:14:51 GMT

Hello, for the past few months I have been looking for information
(formulas, ...) to calculate the efficiency of propellers for
recreational speedboats, for diesel engines, ...

The problem with the libraries is that they mostly have info
for LARGE ships, which I know I cannot extrapolate...

My question is, Does anyone know of a recent book or article that
will contain the formulas necessary to calculate the necessary
horsepower for an engine and the equivalent propeller required, if
say I want a 36' boat (of different configurations) to be able
to attain a speed of 15 knots?  

By the way, has anyone been able to formulate the Taylor graphs for
propeller and ship efficiencies?

Thank you in advance for your help.

			Spyro Kotsonis
			kotsonis@owlnet.rice.edu


Newsgroups: sci.engr.mech
From: mattd@vcd.hp.com (Matt Driggers)
Subject: Re: Mechanical CAD Packages?
Date: Wed, 27 Jan 1993 20:32:29 GMT
Organization: Hewlett-Packard VCD
X-Newsreader: Tin 1.1 PL5

AutoCAD has taken a defacto "standard" position in the PC 
CAD world for mechanical work.  I have never tried it, though.

My wife has Generic CADD on our PC at home and I think it 
stinks for any practical use.  Of course I may be biased
by using a NICE 3-dimensional workstation package.

You might try Hewlett-Packard's ME10d.  It is a 2-dimension 
PC based version of the workstation package that I use. 
I really like the construction line features.  

Contact a local Hewlett-Packard representative for information.

(Warning:  I am biased toward the HP systems.)


---Matt  
Newsgroups: sci.engr.mech
From: TMTS@ibm.rz.tu-clausthal.de
Subject: e-mail adress J.P Carter, Sidney
Organization: Rechenzentrum der TU CLAUSTHAL
Date: Wed, 27 Jan 1993 10:14:22 GMT

Hallo,
Is there anyone, who can give me the e-mail adress of
 
    J.P Carter
    University of Sydney, Australia
    Centre for Geotechnical Research
 
He is the author of AFENA (a FE-package)
Thanks for any hints.
 
Thomas
Xref: sparky sci.engr.mech:830 sci.engr.control:440
From: ravi@gemini.crd.ge.com (Ravi Rajamani)
Newsgroups: sci.engr.mech,sci.engr.control
Subject: Re: Help: Fuzzy logic articles from usenet lost
Date: 22 Jan 93 18:35:56 GMT
Organization: GE Corp. Research & Development, Schenectady, NY

In article <1993Jan22.110418.18885@magnus.acs.ohio-state.edu> samittal@magnus.acs.ohio-state.edu (Samir Mittal) writes:
>
>In the last couple of months, some one had posted the address of
>ftp site where fuzzy logic programs are achived. 
>Last week, there was a post that give a simplied explanation of the
>fuzzy logic. 
>I had saved both these articles but accidently deleted my News
>directory yesterday (yes! the whole of it, courtsey rm -rf). I
>desperately need this articles now, so if anyone has saved them
>or the authors of the original articles would be kind enough to
>give the pointers again. Any help would be really appreciated.
>
>Another thing, where is this newsgroup archived? pit-manager.mit.edu
>is not the place?
>
>thanks
>
>samir mittal


	have you asked your system manager to restore your 
	files from a backup?

	.....r/r
Newsgroups: sci.engr.mech
From: jhallen@world.std.com (Joseph H Allen)
Subject: Re: US System of measurement - Why?
Organization: The World Public Access UNIX, Brookline, MA
Date: Sat, 23 Jan 1993 21:01:26 GMT

In article <1925@blue.cis.pitt.edu> wbdst+@pitt.edu (William  B Dwinnell) writes:
>
>"Why is is  it that the US is the only country in the world ... that
>uses the old English system of measurement?" Easy: the very 
>underappreciated phenomenon of being a vistom (that was supposed to
>be "victim"!) of your own success.

Yes, but most immediately it's because metric was too difficult for The
Gipper to grasp.
-- 
/*  jhallen@world.std.com (192.74.137.5) */               /* Joseph H. Allen */
int a[1817];main(z,p,q,r){for(p=80;q+p-80;p-=2*a[p])for(z=9;z--;)q=3&(r=time(0)
+r*57)/7,q=q?q-1?q-2?1-p%79?-1:0:p%79-77?1:0:p<1659?79:0:p>158?-79:0,q?!a[p+q*2
]?a[p+=a[p+=q]=q]=q:0:0;for(;q++-1817;)printf(q%79?"%c":"%c\n"," #"[!a[q-1]]);}
From: v1a@icf.hrb.com (Vincente Alvarez)
Newsgroups: sci.engr.mech
Subject: Re: Manufacturing Process Modelling
Date: 26 Jan 93 08:28:41 EST
Distribution: world
Organization: HRB Systems, Inc.

I'm taking a simulation class and will be studing mfg processes for my 
PH.D in Engr Sci and Mechanics. Please add me to your list.

THanks
 
-- 


Vincente Alvarez                     Internet: V1A@ICF.HRB.COM
Hrb Systems, Inc.                    Binet:    V1A%HRB@PSUECL.Binet
Dept. 114                            UUCP:     ...!psuvax!hrbicf!v1a
State College, PA. USA
(814) 238-4311 EXT. 2346
(814) 234-7720 FAX
From: miller@pioneer.arc.nasa.gov (Wayne O. Miller FFR)
Newsgroups: sci.engr.mech
Subject: Re:  Bilinear Interpolation
Summary: Mystery revealed
Date: 27 Jan 93 18:32:29 GMT
Article-I.D.: news.1993Jan27.183229.28315
Organization: NASA Ames Res. Ctr. Mtn Vw CA 94035

In article <1993Jan27.173236.16488@cc.ic.ac.uk> you write:
>Hi,
>	I am a student of Aeronautical Engineering and I need to write
>a quick subroutine to do Bilinear Interpolation.  I have no idea how to 
>do this and would greatly appreciate some help via e-mail or by post ...
>
>gliran@ic.ac.uk
>					| |
>			             --=oOo=--

Check out a textbook on finite elements, and look under the headings
of (1) shape functions, (2) interpolation functions, and (3)
isoparametric elements (linear).  Quadrilateral finite elements are
generally mapped to a unit square, with a corresponding coordinate
transformation.  Function values, such as stress, strain, displacement,
etc., are then interpolated over the element using the values at the
four corner nodes to define some suitable interpolation function.
Bilinear interpolation simply means that the function can vary
linearly in both the x and y directions. Thus it would generally
have the following polynomial form : value = a + b*x + c*y + d*x*y.
The coefficients are determined from the known nodal values.  Similar
interpolations are used for triangles, bricks, and elements with
more nodes (resulting in higher-order polynomials).  Good luck.

Regards,
Wayne Miller
Newsgroups: sci.engr.mech,sci.engr.control
From: samittal@magnus.acs.ohio-state.edu (Samir Mittal)
Subject: Thank you for responding 
Organization: The Ohio State University
Distribution: na
Date: Wed, 27 Jan 1993 03:07:45 GMT


I want to express my gratitude to the folks on the usenet
for helping me recollect  some of the fuzzy logic postings 
that i had deleted.  Thank you very much.

If anyone desires the collection of these articles, please email
to me and I would be happy to re-email them.

samir mittal
Newsgroups: sci.engr.mech,sci.engr.control
From: samittal@magnus.acs.ohio-state.edu (Samir Mittal)
Subject: Help: Fuzzy logic articles from usenet lost
Organization: The Ohio State University
Date: Fri, 22 Jan 1993 11:04:18 GMT


In the last couple of months, some one had posted the address of
ftp site where fuzzy logic programs are achived. 
Last week, there was a post that give a simplied explanation of the
fuzzy logic. 
I had saved both these articles but accidently deleted my News
directory yesterday (yes! the whole of it, courtsey rm -rf). I
desperately need this articles now, so if anyone has saved them
or the authors of the original articles would be kind enough to
give the pointers again. Any help would be really appreciated.

Another thing, where is this newsgroup archived? pit-manager.mit.edu
is not the place?

thanks

samir mittal
Newsgroups: sci.engr.mech
From: bd6520@u.cc.utah.edu (BALACHANDRA DESHPANDE/MECHANICAL ENGINEERING)
Subject: URGENT!! need info on matrix methods...
Organization: University of Utah Computer Center Student Mail Machine
Distribution: usa
Date: Sat, 23 Jan 93 18:24:38 GMT



	HI,
	 Can someone please direct me to a good book on matricies that deals
with concepts like "singular value decomposition", condition numbers",
in a very basic sort of way...I need it in connection with some class work
on robotics, if its any help...I would really appreciate any info on this
	Thanks,
	Bala.

Newsgroups: sci.engr.mech
From: brucew@hilbert.coe.northeastern.edu (Bruce Wilson)
Subject: Automated Modeling CALL FOR PAPERS
Keywords: automated modeling
Organization: Northeastern University
Date: Fri, 22 Jan 1993 15:33:30 GMT

CALL FOR PAPERS
 
SYMPOSIUM ON AUTOMATED MODELING FOR DESIGN
 
THE 1993 ASME WAM 
NOVEMBER 28 - DECEMBER 3, 1993 
NEW ORLEANS
 
The Modeling and Identification Technical Panel of the Dynamic Systems
and Control Division of ASME is sponsoring a symposium to address the
current issues in developing automated modeling environments for
design.  The symposium will be held at the 1993 ASME Winter Annual
Meeting.
 
Topics: The topics to be addressed may include: general modeling,
analysis and simulation methodologies (both the synthesis and the
selection problem) for creating models for What If? design studies.
Methods for computing relevant performance metrics and integrating
these metrics with design specifications (e.g., with QFD
technologies).  Techniques for model validation/verification; model
reduction and augmentation strategies; and definitions of model
quality.
 
Objectives: The objectives of the symposium include: providing a forum
for researchers from the physical system modeling, automated modeling
and qualitative reasoning, design, design theory and methodology, and
CAE (simulation) communities to discuss their ideas and to compare
their goals, strategies, vocabulary etc.  To encourage participants-to
identify important research issues and engineering hurdles.  To
introduce new researcher to the field.
 
If you have any questions or suggestions, please contact Prof. Jeff
Stein at the address or phone numbers given below.
 
Papers accepted for publication are also eligible for publication in
the Journal of Dynamic Systems Measurement and Control.  Those wishing
to select this option should indicate so in a cover letter submitted
with their manuscript.  Because the review process for the Journal
takes longer than the review for the symposium, manuscripts will be
sent on to the Journal office at the conclusion of the symposium
review process along with the reviews obtained from the symposium
review.
 
Abstract (<300 Words) due March 8, 1993.
Notification of Abstract Acceptability March 15, 1993.
Manuscripts (4 copies) due May 1, 1993.
Notification of Manuscript Acceptability June 15, 1993.
Final manuscript due on Mats July 15, 1993.
 
Send all material to:
 
Prof. Jeffrey L. Stein
Dept. of Mechanical Engineering
2250 G.G Brown
The University of Michigan
Ann Arbor, MI 48109-2125
Tel # (313) 936-3336
FAX #(313) 747-3170
Email:J._Stein@Um.CC.Umich.Edu
 
 



Newsgroups: sci.engr.mech
From: A.H.Al_ashaab@lut.ac.uk (AH Al_ashaab) 
Subject: Re: Manufacturing Process Modelling
NOTE: The message bounced back to me so I am posting it in this group.
Reply-To: A.H.Al_ashaab@lut.ac.uk (AH Al_ashaab)
Organization: Loughborough University, UK.
Date: Mon, 25 Jan 93 15:24:18 GMT

In article <1jo0jaINNc4m@manuel.anu.edu.au> you write:
>I have just arrived in Australia from the UK. I'm particularly interested in finding out
>who is interested in the area of  modelling of manufacturing processes, particularly
>casting and forging and in particular within Australia. 
>
>I have a fair idea of what is going on in the UK , Europe and bits of the US but I want to
>hear from ANYBODY ANYWHERE who has an interest.
>Thanks 
>Mick Cardew-Hall
>Engineering Program
>Australian National University
>GPO Box 4
>Canberra
>ACT
>AUSTRALIA
>
>Tel:   06-2490330
>fax:   06-2490506
>email: mch@faceng.anu.edu.au

Dear Mike
My Ph.D Reaserch is about developing a manufacturing Model of injection moulding
process that is aimed to work parrall with the product model to provide a wide rain
 rang of information to enable concurrency in design for function and design for
manufacture.

Below is an abstract of paper of mine that I submitted to the Journal of 
Integrated Manufacturing System. In case if you are interested in my work
I can eitehr EMail a PostScript Version of it or Post the paper to you.


A Manufacturing Model: Supporting Concurrency in Injection Moulded Products Design
A

ABSTRACT

In product design the designer should be aware of a wide range of information, covering both the product's functional requirements and the manufacturing capabilities and constraints of the processes which may be used in product manufacture.
The research reported in this paper is exploring the structure of Information Models to aid product design, specifically for the injection moulding process. While Product Modelling research is showing promise as a base for providing structured product life cycle information to designers, this paper explores the parallel concept of a Manufacturing Model to capture manufacturing information. 
In combination these models can provide the key sources of information to enable concurrency in design for function and design for manufacture. The paper describes the use of activity and data modelling techniques to define the requirements of such an information system. An initial experimental Object-Oriented system is presented which explores the structure and use of a Manufacturing Model and its interactions with a Design For Mouldability application to support injection moulded product design.




Ahmed AL-ASHAAB
Manuf. Eng Dept., Loughborough Univ of Tech
Loughborough, Leics LE11 3TU, England.
EMail : A.H.Al_ashaab@lut.ac.uk  OR     ahmed@mansun.lut.ac.uk
Tel 0509-263171 Ext. 4247       Fax. 0509-267725



Newsgroups: sci.engr.mech
From: nagle@netcom.com (John Nagle)
Subject: Re: Inexpensive modeling kit
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Fri, 22 Jan 1993 03:04:48 GMT

ajackson@ernie.Princeton.EDU (Andrew William Jackson) writes:
>In article <1993Jan19.174435.27423@ringer.cs.utsa.edu> johnny@ennex5.eng.utsa.edu (Johnny Roberts) writes:
>>	Hello all
>>
>>	I am wondering if anyone can point me towards an inexpensive way  
>>to construct mechanism models for study purposes? I am an M.E. student  
>>currently taking some mech design classes, and am beginning to think how  
>>handy an "expert" version of something like an erector set would be.

       There's Erector and Lego, of course, which you get at the local
Toys-R-Us.  Beyond that, there are precision mechanical breadboarding
kits from Berg (516-599-5010), consisting of slotted breadboards,
gears, mounting brackets, shafts, hangars, etc, packaged in a nice
leather carrying case with felt-lined slots for the parts.  
Not cheap; prices start around $1000 and go to $3000, but you get
500 to 2000 precision parts in the kit.  These are serious machined
parts, not stampings.  You can also order
parts as needed from the Berg catalog, of course.  Other useful
suppliers include Stock Drive Products (516-328-3300) and Small Parts, Inc.
Get the catalogs; they're free.  Gives you a good sense of what's available
off-the-shelf.

       Comparable kits for optical prototyping exist, from Edmund
Scientific and Oriel.  Not cheap either, but again, you can order what
you need if you don't need a whole kit.

					John Nagle

					John Nagle
Newsgroups: sci.engr.mech
From: bd6520@u.cc.utah.edu (BALACHANDRA DESHPANDE/MECHANICAL ENGINEERING)
Subject: THANKS for help with Matrix question...
Organization: University of Utah Computer Center Student Mail Machine
Distribution: usa
Date: Tue, 26 Jan 93 05:51:16 GMT

Newsgroups: sci.engr.mech
Subject: THANKS for the help with matrix methods....
Summary: 
Expires: 
Followup-To: 
Distribution: usa
Organization: University of Utah Computer Center Student Mail Machine
Keywords: 


	Thanks to all the people who helped me out with the Matrix Methods
books/references questions. I appreciate all the suggestions. Thanks again!

Bala.
Organization: University of Illinois at Chicago
Date: Thu, 21 Jan 1993 09:52:12 CST
From: Bones, <U38956@uicvm.uic.edu>
Newsgroups: sci.engr.mech
Subject: Looking for robot info

Can anyone provide me with the following:

Info on how to find the linear distance a robot has travelled or moved its
appendages by means of a voltage reading.

Info on the workings of an LVTD sensor

Any brief descriptions, explanations, or insughts yu may have on robots.

It would be appreciated very much if this info could be provided before Tuesday
the 26th.

Thanks in advance,
Fredi Dangoy
ME, UIC
u38956@uicvm.uic.edu
From: mch@anu.edu.au (Mick Cardew-Hall)
Newsgroups: sci.engr.mech
Subject: Manufacturing Process Modelling
Date: 22 Jan 1993 05:27:06 GMT
Organization: Interdisciplinary Engineering Program, ANU, Australia
Distribution: world
Reply-To: mch@anu.edu.au
NNTP-Posting-Host: 150.203.45.16


HI

I have just arrived in Australia from the UK. I'm particularly interested in finding out
who is interested in the area of  modelling of manufacturing processes, particularly
casting and forging and in particular within Australia. 

I have a fair idea of what is going on in the UK , Europe and bits of the US but I want to
hear from ANYBODY ANYWHERE who has an interest.

I'll compile a list and mail it to those that drop me a line.


Thanks 


Mick Cardew-Hall
Engineering Program
Australian National University
GPO Box 4
Canberra
ACT
AUSTRALIA

Tel:   06-2490330
fax:   06-2490506
email: mch@faceng.anu.edu.au


Newsgroups: sci.engr.mech
From: ljg1401@uxa.cso.uiuc.edu (Ling Jin )
Subject: Dynamic simulation data? Mutual help wanted!
Summary: dynamic simulation data wanted
Organization: University of Illinois at Urbana
Date: Thu, 21 Jan 1993 04:33:12 GMT
Keywords: simulation data


Hi everyone,

    I am a computer science graduate student specializing in computer graphics
and scientific visualization. I am currently doing a semester project on 
computer graphics animation. I used be to a mechanical engineering student,so I
would like to choose my project in that area. The project I intend to do is to 
implement a computer animation of dynamic system ( prefer dynamic structural
problems using FEM ). The problem is that I don't have any simulation data at
hand. Generating this kind of data is very time consuming and is not my 
expertise. So the deal is if you have some data you want to visualize or animate
( you don't know how to do it or you don't have time to do it.), you supply
the data to me and I will render it for you on SGI(Silicon Graphics) or SUN 
Sparc Station free of charge. All source code I develop for rendering will be 
provided to you after the project is done.

   Or if you have information about some simulation data which is avalaible in
public domain, please drop me a line at


      schen@bert.eecs.uic.edu

   Thanks in Advance!

   Chen
Organization: University of Illinois at Chicago
Date: Thu, 21 Jan 1993 09:49:27 CST
From: Bones, <U38956@uicvm.uic.edu>
Newsgroups: sci.engr
Subject: Looking for robot info

Can anyone assist me in acquiring info on the foloowing:

How to find the linear distance that a robot has moved based on the voltage
reading.

LVTD sensor operations

Any brief descriptions or insights about robots in general.

I would appreciate anyone sending me this info before Tuesday the 26th.

Thank you very much for your help
Fredi Dangoy
u38956@uicvm.uic.edu
Newsgroups: sci.engr
From: jayakris@translab.its.uci.edu (R. Jayakrishnan)
Subject: Re: Do people talk about traffic control in this group
Newsgroups: sci.engr.control,sci.engr.civil
Organization: University of California, Irvine
Date: 27 Jan 93 01:10:11 GMT
Distribution: usa

In article <C1H3Lw.57r@vuse.vanderbilt.edu> sarafrk@vuse.vanderbilt.edu (Rajeev K. Saraf) writes:
>Hi netters,
>I am in transportation engineering working in area of real time traffic
>control. I was wondering if users in this group discuss about this area,
>or if this topic falls outside the the scope of this group.
>Thanks,
>
>Rajeev Saraf

  We can of course talk about traffic control in this newsgroup. 
  There is no question that traffic engineering is part of civil engg.
  Go ahead, start the discussion !

  (I think we have talked about a couple of traffic engg topics a few
   months back... Such as IL Detector configurations)

  Jay
Newsgroups: sci.engr.control
From: bencze@isl.stanford.edu (William J. Bencze)
Subject: Re: Convex Quadratic Programming
Organization: Stanford University
Date: 22 Jan 93 12:15:55

>> On Fri, 22 Jan 1993 09:42:23 GMT, rairan@ecf.toronto.edu (RAI Ranjan) said:

>   Hello.  Does anyone know of interesting applications of CONVEX quadratic
> programming in control?  References would be appriciated.

  Take a look at "Linear Controller Design, Limits of Performance" by
Stephen Boyd and Craig Barratt. (Prentice Hall, 1991).  They show that a
wide range of common controller design problems can be described as convex
optimization problems.

-Bill
--
 Bill Bencze                               bencze@isl.stanford.edu




Newsgroups: sci.engr.control
From: wung@eecom.gatech.edu (Peter Wung)
Subject: Chaos based control in NYT
Reply-To: wung@eecom.gatech.edu
Organization: School of EE, Georgia Institute of Technology, Atlanta, GA
Date: Thu, 28 Jan 1993 16:51:01 GMT

An article concerning the implementation of chaos theory in Japan was in
the January 27th Business section of the New York Times.  It was rather 
interesting, some of the salients point made by the writer:

* American implementation of new technology is geared toward military
applications.  (Very astute observation.)

*Japanese research of new technology is geared toward consumer goods.
(Again, very astute.)

*A Japanese academic voiced his fear that Japan's propensity for quick, 
simple applications detract from basic long term research.  He cites
a lack of real understanding of the subject.

*Cited fuzzy logic as the last fad.

*No government backed programs for chaos reserach is on the horizon, 
but there are two industry/academic committees studying the applications 
of chaos.

*Toyota is sponsoring a conference named:"Toward the Harnessing of Chaos".

*The research is split into two catagories:
	1) Analyze chaotic behavior to search for patterns.
	2) Creating chaotic behavior and using it.

Under the first category, the following works were cited:
*Stock market forecasting-Hitachi.
*Diagnose mental health by measuring capillary pulse in the 
fingers-Computer Convenience.

Under the second category: 
*Kerosene heater control-Sanyo.  Allows temperature to fluctuate, 
saves energy, more comfortable.
*Chaos in neural network computers-Kazuyuki Aihara, Tokyo Denki U.
*Chaos chip-New Japan Radio Corp.  Can be used in stereos to generate 
light patterns to accompany music.

---
********************************************************************
*Peter Wung			Email:wung@ee.gatech.edu	   * 
*Electric Power Laboratory	Snail mail: 33787 Ga. Tech Station * 
*School of Electrical Engineering	    Atlanta, GA 30332      *
*Georgia Institute of Technology			    	   *
*Atlanta, Georgia						   *
*   	"Pass, Set, CRUSH!"...					   * 
*  	Well, 2 out of 3 ain't bad for a short, fat guy. 	   *
*								   *
********************************************************************