HDTenEightyP/NetNews huggingface dataset:
Organization: Queen's University at Kingston
Date: Saturday, 12 Sep 1992 22:42:51 EDT
From: K. Roper <ROPERK@QUCDN.QueensU.CA>
Newsgroups: sci.engr.chem
Subject: Cleaning hot water pipes?

  I've just moved into a "new" place -- what a disaster!

  Among other things (cat urine in carpet AND floorboards; fleas;
   noise), I have a rather "green" smell coming from my hot water
   faucets and/or the drain pipes (I can't easily remove the drain
   pipes, so things are a bit confounding).  It's most likely coming
   from both since the smell doesn't appear until the hot water is
   turned on, and it lingers a bit afterward.

  My guess is that something is living in the pipes, possibly in
   the elbows.  A plumbing store person has suggested that fungi
   (well, "green stuff" -- fungi just seem more likely than most,
   to me) can collect on a part of the water heater and that that
   part should be replaced.  However, the temperature of the heater
   is scaldingly hot, so IMHO it's probably a non-bacterial bug
   that's living in the cooler parts of the pipes.  The heater was
   shut off for 2 or 3 months before I moved in, so it had plenty
   of time to get smelly.  It seems to have reached a steady-state
   level of smell.

  The question is:
        Does anyone out there know of a reasonable chemical I can
     dump into the HWT so I can run it through all of the HW pipes?
     I suspect I'd need an antifungal; I'd prefer to run it through
     warm-to-hot to facilitate removal of possible residue from
     the pipes.  If necessary, I'll just use the strongest ubiquitous
     cleanser that won't corrode the heater parts and pipes.

  Ideas?


  Kim

  (This is what I get for being a !#@$% theorist ..... *sigh*)
Newsgroups: sci.engr.chem,sci.chem,sci.med,sci.engr.civil,nm.general
From: mvp@hsv3.lsil.com (Mike Van Pelt)
Subject: Re: NRDC Criticizes Domenici Plan to Gut Drinking Water Protections
Organization: LSI Logic/Headland Technology
Date: Sat, 5 Sep 1992 01:19:39 GMT

In article <1992Sep3.021319.9173@samba.oit.unc.edu> Nigel.Allen@bbs.oit.unc.edu (Nigel Allen) writes:
>Here is a press release from the Natural Resources Defense Council.
>   Also, Domenici's proposal would erect roadblocks to EPA's
>regulation of ...  cancer-causing "disinfection by-products."
				    ^^^^^^^^^^^^^^^^^^^^^^^^
That's bureaucrat-speak for what's left of typhoid and cholera germs
when the chlorine in chlorinated drinking water kills them.

Just so we all know what's being talked about here.

Looking up the numbers for how many millions of people have died of
typhoid and cholera is left as an exercise for the reader.

Looking through that entire press release, I didn't see a thing
about the actual amounts.  Doubtless it's more hand-wringing over
parts-per-trillion.
-- 
  Caution: Thermostellar device.          Mike Van Pelt
       Handle with care.                  LSI Logic/Headland Products
 Do not expose to first-semester          mvp@hsv3.lsil.com
     Philosophy students.                 sun!indetech!hsv3!mvp
Organization: Penn State University
Date: Tue, 15 Sep 1992 15:45:39 EDT
From: MICHELLE GLADFELTER <MXG135@psuvm.psu.edu>
Newsgroups: sci.engr.chem
Subject:    Tables of physical data

      Does anyone know where I can find tables of physical data in standard
      ascii format?  If anyone can help with this I would appreciate it.
      Thanks in advance....
From: jkd2886@usl.edu (Davis Jason K)
Newsgroups: sci.engr.mech
Subject: Wind powered vehicle competition
Date: 8 Sep 92 21:21:23 GMT
Organization: University of Southwestern Louisiana


	Does anyone out there know of any competitions (in the 48 mainland  
United States) for a wind powered vehicle?  USL is thinking of putting
together a wind-powered vehicle for a senior project, and we want to know
if there might be something more in it besides a rich person's new toy.
We might be able to get more funding, also, if there is a competition.
Any replies would be appreciated...

						Isenguard
						jkd2886@usl.edu
Newsgroups: sci.engr.mech
Subject: Re: modified turboprop into car
From: hoyt@isus.UUCP (Hoyt A. Stearns jr.)
Date: 31 Aug 92 03:42:33 GMT
Followup-To: sci.engr.mech
Organization: International Society of Unified Science
Keywords: automobile gas turbine
Summary: Garrett AGT101 gas turbine

In article <24238@oasys.dt.navy.mil> goldberg@oasys.dt.navy.mil (Mark Goldberg) writes:
>
>However, I have no doubt that some new technology may change things.
>Already, turbocharged engines are featured in many cars.  These integrate
>an element of gas turbine propulsion into a reciprocating engine (compressor
>driven by exhaust gas).
>
I have a brochure on the Garrett Turbine Engine Company's AGT101
automotive gas turbine.  They have been working on this for years in
conjunction with Ford.  As described it is a 100 HP, 40MPG, centrifugal
compressor, single inflow radial turbine, with rotating ceramic exhaust
gas heat recovery device. There are versions with metal and ceramic hot
section turbine wheels.  Both look very small (4-10 cm).

I hope they perfect it soon, maybe these new Ukrainian high temp. ceramics
will be useful.

The AGT101 is shown connected to a conventional automatic transmission.
Perhaps it would be better to drive a rare-earth alternator directly,
and power the car with rare-earth electric motors, so they can run the
turbine at its optimum speed at all times. With an electric drive, the
turbine can be mounted in a gimbal and compliant mounting, thus reducing
the gyroscopic and vibration stresses on the ceramic turbine wheel, which
I have heard from an unreliable source, is one of the main problems
(driving along, you hit a bump, and your turbine wheel turns to sand
which blows out the exhaust pipe :-) ).

-- 
Hoyt A. Stearns jr.|hoyt@          | International Society of Unified Science|
4131 E. Cannon Dr. |isus.tnet.com -| Advancing Dewey B. Larson's Reciprocal  |
Phoenix, AZ. 85028 |ncar!enuucp!   | System- a unified physical theory.      |
voice_602_996_1717 telesys!isus!hoyt The Universe in two postulates__________|
From: garrick@owlnet.rice.edu (Garrick F. Mitchell)
Newsgroups: sci.engr.mech
Subject: Anybody know about 1993 Mini Baja?
Date: 13 Sep 1992 04:49:57 GMT
Distribution: usa
Organization: Rice University Mini Baja Project Team


Just wondering if Briggs & Stratton have told anybody the details
about the 1993 Mini Baja competition, especially what rule changes
have been made and where/when the competition actually is.

Local reps say "We'll get back to you in a couple of weeks."  Is
this because nothing's actually been set yet???


Thanx in advance,

Garrick Mitchell
garrick@owlnet.rice.edu
Newsgroups: sci.engr.mech
From: schiedec@sunslc.imw.tu-clausthal.de (Norbert Schiedeck)
Subject: gear cutting
Organization: Techn. Univ. Clausthal
X-Newsreader: Tin 1.1 PL5
Date: Thu, 10 Sep 1992 14:15:53 GMT

Thanks four your helpful advice. But sorry I am not interested in history of
gear cutting, that`s an pleasant hobby of an pensioner. But if books of that 
age really represent the latest level of the Northamerican research in that 
field, maybe there is any coherence to the state of the Northamerican state of
 machine tool and automobile industry. But may be it exist some later research.

With most best regards

Norbert 
Newsgroups: sci.engr.mech
From: cjs1722@zeus.tamu.edu (STEPANIAN, CHRISTOPHER JOHN)
Subject: Re: Wind powered vehicle competition
News-Software: VAX/VMS VNEWS 1.41    
Organization: Texas A&M University, Academic Computing Services
Date: Thu, 10 Sep 1992 16:18:00 GMT

In article <1992Sep8.212123.7239@usl.edu>, jkd2886@usl.edu (Davis Jason K) writes...
> 
>	Does anyone out there know of any competitions (in the 48 mainland  
>United States) for a wind powered vehicle?  USL is thinking of putting
>together a wind-powered vehicle for a senior project, and we want to know
>if there might be something more in it besides a rich person's new toy.
>We might be able to get more funding, also, if there is a competition.
>Any replies would be appreciated...
> 
>						Isenguard
>						jkd2886@usl.edu

 Well I know that the RPI undergraduate composites lab folks where talking
  about doing somthing like that when I was there. Perhaps you could try
  them???

 chris
Newsgroups: sci.engr.mech
From: hallvard@immhp3.marina.unit.no (Hallvard Paulsen)
Subject: Re: modified turboprop into car
Reply-To: hallvard@immhp3.marina.unit.no (Hallvard Paulsen)
Organization: Division of Marine Engineering
Date: Wed, 9 Sep 92 07:18:45 GMT

In article <1992Sep8.233727.25617@doug.cae.wisc.edu>, longstre@cae.wisc.edu (Jon Longstreth) writes:
|> Actualy, as I remember (and someone correct me if I'm wrong)
|> there are a couple of minor draw backs to gas turbine engines for cars
|> (spinning too fast not being one of them)
|> 

	You are *not* wrong, but I will add some info to your posting.

|> They tend to produce conentrations of NOx's that are too high for
|> EPA standards.

	I don't think this is a problem than can not be solved if
car turbines were to be produced.
 
|> They aren't as efficient when made small enough to fit nicely in a car.
|> (something about efficiency of small blades)

	In general the diesel engine is by far the most efficient.
In a car the engine has an efficiency of up to 40% while a turbine only
can get up to about 30% in a large powerplant. This has to do with the
fact that the maximum temperature inside a "piston engine" can be mush higher
than in a turbine. I would expect a gasoline engine to be about as efficient
as a turbine.

	One more problem with the turbine is that a simple 1 axel tubine
won't work since the turbine will only work at it's optimum at a fixed speed.
Cars don't travel at fixed speeds. A more expecive 2 axsel system would be
quite good, but the power turbine to has a relatively narrow "efficency band".


|> --
|> Jon Longstreth         : CAE unix system staff             Dept. of Shade Trees
|> longstre@cae.wisc.edu  :"It's only water, in a strangers tears." -Peter Gabriel


  \\___//
  |     |       Hallvard Paulsen, MSc
  |_____|       Research Engineer / Grad. Student
  || o ||       Division of Machinery
  || \\||       NORWEGIAN MARINE TECHNOLOGY RESEARCH INSTITUTE
      \\        TEL : +47 (07)595522 
       o        FAX : +47 (07)595983
      //        EMAIL : hallvard.paulsen@imm.unit.no
     O
From: longstre@cae.wisc.edu (Jon Longstreth)
Newsgroups: sci.engr.mech
Subject: Re: modified turboprop into car
Date: 9 Sep 92 04:37:27 GMT
Organization: College of Engineering, Univ. of Wisconsin-Madison
Originator: longstre@ws-39.cae.wisc.edu


In article <24476@oasys.dt.navy.mil>, paraska@oasys.dt.navy.mil (Pete Paraska) writes:
|> I seem to remember one of my engineering instructors telling us that
|> turbine engines in cars would not be feasible since the output shaft
|> speed for efficient operation was so large compared to the speed needed
|> for input to a typical automobile transmission.
|> 
|> It seems that very large gear ratios would be needed to bring the "efficient"
|> turbine engine output shaft speed down to a range that a car can use.
|> Therefore, a large reduction gear train would be needed.
|> 
|> Am I wrong here?
|>
Actualy, as I remember (and someone correct me if I'm wrong)
there are a couple of minor draw backs to gas turbine engines for cars
(spinning too fast not being one of them)

They tend to produce conentrations of NOx's that are too high for
EPA standards.

They aren't as efficient when made small enough to fit nicely in a car.
(something about efficiency of small blades)
--
Jon Longstreth         : CAE unix system staff             Dept. of Shade Trees
longstre@cae.wisc.edu  :"It's only water, in a strangers tears." -Peter Gabriel
Newsgroups: sci.engr.mech
From: Sundar_Prasad@mtsg.ubc.ca
Subject: Impact load measurement/analysis methods?
Organization: Civil Engineering, Univ of BC
Distribution: na
Date: Mon, 14 Sep 1992 22:26:59 GMT

Hiya all,
I am looking for references on measuring and analysing impact loads on
structures. Specifically, my problem deals with hydrodynamic impact due
to ocean waves on offshore platform elements. But any work on experimental
measurement of high frequency or short duration loads will be useful.
Thanks for any pointers.

Sundar Prasad
Ocean Engineering
UBC, Vancouver, Canada
 
Newsgroups: sci.engr.mech
From: bryanh@dseg.ti.com (Bryan Hazel)
Subject: Re: gear cutting
Reply-To: bryanh@dseg.ti.com
Organization: Just Me
Date: Mon, 14 Sep 1992 23:28:16 GMT

In article 22226@solaris.rz.tu-clausthal.de, schiedec@sunslc.imw.tu-clausthal.de (Norbert Schiedeck) writes:
>Thanks four your helpful advice. But sorry I am not interested in history of
>gear cutting, that`s an pleasant hobby of an pensioner. But if books of that 
>age really represent the latest level of the Northamerican research in that 
>field, maybe there is any coherence to the state of the Northamerican state of
> machine tool and automobile industry. But may be it exist some later research.
>
>With most best regards
>
>Norbert 

Maybe Northamericans know when to stop beating a dead horse? :)


Xref: sparky sci.engr.mech:289 sci.engr:2007
From: dh4j+@andrew.cmu.edu (David O Hunt)
Newsgroups: sci.engr.mech,sci.engr
Subject: Otimization (MINLP)
Date: 13 Sep 92 22:29:56 GMT
Article-I.D.: andrew.weh35YG00XsFICbksS
Organization: Masters student, Mechanical Engineering, Carnegie Mellon, Pittsburgh, PA

Help!

I'm trying to do a misex-integer non-linear optimization and the code
keeps bombing on me.  I'm trying to use a weighted constraint violation
to help point the way down certain branches of the binary tree that
should, heuristically, have the optimum down them.

Any ideas?  I'm currently using GAMS.

David Hunt - Graduate Slave | My mind is my own.          | Towards both a
Mechanical Engineering      | So are my ideas & opinions. | Palestinian and
Carnegie Mellon University  | <<<Use Golden Rule v2.0>>>  | Jewish homeland!
============================================================================
Email:  dh4j@cmu.edu            Working towards my "Piled Higher and Deeper"

"Out there is a fortune waiting to be had; do you think I'd let it go you're
mad - you got another think coming!" -- Nazareth
From: st_waldman@zodiac.dsto.oz.au
Newsgroups: sci.engr.mech
Subject: Frequency-domain curve fitter wanted
Date: 7 Sep 92 21:42:06 GMT
Organization: D.S.T.O. Aeronautical Research Laboratory

Hi,

I am interested in curve-fitting sound pressure and impedance
response functions in the frequency domain using a rational
fraction polynomial formulation. Does anyone have any source
code to such a routine in Fortran, Pascal, or C?.

I have seen a paper titled "A Frequency Domain Curve Fitting
Algorithm With Improved Accuracy", by Jim Adcock (Hewlett-
Packard) and Ron Potter (Consultant) that was presented at a
modal analysis convention a few years ago.

The above algorithm can fit to data that is log-spaced in the
frequency domain, which is the common form for audio/acoustic
measurements as published in loudspeaker manufacturers data
sheets.

My application is related to modelling of loudspeaker systems so
that it will be possible to design crossover networks that take
into account each driver's natural response characteristics.

Any suggestions or pointers where I could obtain program source
code that implements this algorithm will be gratefully received.

Maybe even someone from Hewlett-Packard can help me?

Thank you.

-----------------------------------------------------------------------
 Witold Waldman
 Aeronautical Research Laboratory   Internet: witold@hotblk.dsto.gov.au
 Melbourne                          Fax     : +61 3 646 7771
 Australia                          Tel     : +61 3 647 7488
-----------------------------------------------------------------------
Newsgroups: sci.engr.mech
From: eekhfung@uxmail.ust.hk (Fung Ka Hing)
Subject: Thermal analysis of silicon die
Organization: Hong Kong University of Science and Technology
Date: Wed, 9 Sep 1992 08:40:28 GMT

We have an undergoing project that needs to know the thermal distribution on
the die of integrated circuit.  Can anyone help me by suggesting some reference
book or some thermal analysis software for this purpose.
Newsgroups: sci.engr.mech
From: sneal@muskwa.ucs.ualberta.ca (Steve Neal)
Subject: Re: gear cutting
Organization: University Of Alberta, Edmonton Canada
Date: Sat, 5 Sep 1992 06:16:10 GMT

schiedec@sunslc.imw.tu-clausthal.de (Norbert Schiedeck) writes:

>Who has a publicationlist (particularly nongerman authors) or knows some publications about manufacturing gears, especially milling and grinding. Please drop me  an Email or post it. I am rather interested in that subject and also in neighboured fields of research (e.g. noise reduction in gears). I look forward to receiving a lot of new informations. Thanks in advance!


>Norbert Schiedeck

>Technische Universitaet Clausthal 
>Germany

There is a 1937 textbook called "Gear Cutting Practice" by Colvin and Stanley
which has been recommended to me.  You can get it for US $13.95 from
 
Lindsay Publications
PO Box 538
Bradley, Illinois
USA
60915-0538

Lindsay specializes in old (1900-1950) shop manuals and textbooks, mostly
to do with metalworking and machining.

   -- Steve

Newsgroups: sci.engr.mech
From: dodeca!clyde@jarthur.Claremont.EDU
Organization: Ameritec Corporation
Reply-To: cvisser@ucrmath.ucr.edu ("Clyde R. Visser, KD6GWN")
Subject:   NEW electric vehicle mailing list
Date: Sun, 13 Sep 1992 15:36:52 PDT
X-Received: by usenet.pa.dec.com; id AA21014; Sun, 13 Sep 92 16:07:22 -0700
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EV on LISTSERV@sjsuvm1.sjsu.edu -  EV Electric Vehicle Discussion
                                   Mailing List

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provide  a  forum  to discuss the current state of  the  art  and 
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combustion engine.  Those "discussions" are best relegated to the 
appropriate usenet newsgroup.

An  electric vehicle is any vehicle which uses an electric  motor 
as  the primary or sole motive force.  The energy storage  device 
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combination of these.  Production electric vehicles are currently 
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To  subscribe,  send the following  command  to  LISTSERV@SJSUVM1 
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Newsgroups: sci.engr
From: rizzo@cbnewsf.cb.att.com (anthony.r.rizzo)
Newsgroups: sci.engr
Subject: Re: Question on Yield strength of aluminum
Keywords: yield strength, aluminum
Date: 14 Sep 92 14:36:46 GMT
Distribution: na
Organization: AT&T

In article <1992Sep12.094121@IASTATE.EDU> ifan24@IASTATE.EDU (Ifan Alki) writes:
>Hi everybody,
>
>I have a question about the yield strength of aluminum.
>I have a stress-strain diagram of a tensile test.
>The question is "How to determine the yield 
>strength of the alumium, based on that
>diagram?"
>For high strength steel we take .2% offset strain or .5% strain extension
>under load.
>Is this applicable to aluminum ?
>Please also give me the sources about this matter.
>

Why would it NOT be applicable to aluminum?  In any case,
aluminum is a ductile metal, and the yield strength
is a definition.  If the 0.2% offset definition is not
adequate for your particular application, and you have
the LUXURY of testing samples from your lot of aluminum,
then you can use the stress at any offset value that will
suit your purpose.  You could even use the elastic limit,
or the proportional limit, if that's what you need and you
can determine a value for it.

Tony
Newsgroups: sci.engr.control
From: PH19@vm.ucs.UAlberta.CA
Subject: Parameterizing control systems
Organization: University Of Alberta, Edmonton
Date: Sun, 13 Sep 1992 21:08:00 GMT

Hi;

I'm trying to estimate the parameters of a fairly simple classical control
system.  There are n parallel systems each of which is a simple second
order system using the same paramters (ie, all n systems have identical
parameters).  The inputs to these systems are known, but the outputs
are not, rather what I have is a stream of data showing the identity of
the system that had the highest output at that time.  From this data
I hope to find out the parameters.  Has anyone any suggestions as to
where I might look to find out how to do it?  Or better yet, has anyone
any idea of how it might be done.  Oh, and for the curious, this is a
model of a consumer choice process where the data is the purchased
brand and timing and the inputs are the pertinent marketing variables
for each of n products.

Any help would be greatly appreciated.

Chris Dubelaar
From: andrew@rentec.com (Andrew Mullhaupt)
Newsgroups: sci.engr.control
Subject: Nonquadratic Control Costs (Minimum Fuel?)
Date: 14 Sep 92 00:52:19 GMT
Organization: Renaissance Technologies Corp., Setuket, NY

If you change the control costs in the classical Linear Quadratic
tracking problem from a quadratic form, say u^2, to a term of the
form |u|, does anyone know what to do next?

Note that the Tracking error is still quadratic, so it is not obvious
that L_1 control helps.

I have the idea that this kind of problem may have been called "minimum
fuel" at some point, but I don't really know.

Thanks in Advance,
Andrew Mullhaupt
From: tching@target.water.ca.gov (Tracy Ching <SysAdmin>)
Subject: Re: Fuzzy Control  (more questions)
Keywords: fuzzy control
Organization: California State University, Sacramento
Date: Sat, 12 Sep 1992 19:07:38 GMT

In article <68037@hydra.gatech.EDU> gm26@prism.gatech.EDU (MCMURRAY,GARY V) writes:
> I am having trouble understanding how the membership function
>is created in order to create linguistic control rules and the defuzzification
>rules. 
>Internet: gm26@prism.gatech.edu

	What techniques (if any) are available to come up with the membership
functions.
tching@water.ca.gov
Newsgroups: sci.engr.control
From: Ung-Ho Yi <ungyi@magnus.acs.ohio-state.edu>
Subject: hi
Organization: The Ohio State University
Date: Sun, 13 Sep 1992 13:50:46 GMT
X-Mailer: ELM [version 2.3 PL11]

hi everyone,
i am very glad that there is a news group for control.
i hope we can make this news group into very good one.


see you netters later,


yi
Newsgroups: sci.engr.control