Subject: Re: Titles in the Workplace (was Re: Drafting Software Survey)
From: "S. Yoder"
Date: 23 Nov 1996 05:49:49 GMT
Dennis Shinn wrote in article
<56udh1$oa2@news1.halcyon.com>...
> Terrific post, Stef. I mean that.
>
> Years ago when I was wet behind he ears and just started out in drafting
(yes, I
> share your pashion for the art of technical drawing) I worked under the
> direction of a lady architect/job captain. As I read your post I had a
mental
> image of just what you've been, and probably still are up against. She,
my boss
> in effect, had to jump through all the same hoops being the only woman in
a
> production department of over 50 old line drafters and architects. But
she
> managed and managed well much to her credit. I'm talking about the early
70's
> here.
>
> Keep up the good work, Stef, and know that you've got moral support here
for
> what it's worth. And if you're ever in the Seattle area and need work,
look me
> up.
Wow, Dennis, I'm honored. Thank you.
I've been off-line for a bit as I've just landed a part-time teaching
position
at a local community college, or I'd have replied sooner.
Thanks again,
Stef
--
______ ( ) http://www.netcom.com/~yodersj/
| |-| (oo) mailto:yodersj@ix.netcom.com
| |-| \/ ------------
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------ | | | * Aided
^ ^ ^ Drafting
Subject: UCLA short courses on Cryogenics
From: BGOODIN@UNEX.UCLA.EDU (William R. Goodin)
Date: Fri, 22 Nov 1996 18:25:32
On February 24-28, 1997, UCLA Extension will present the short course,
"Advanced Long-Life Cryocoolers", on the UCLA campus in Los Angeles.
The instructors are Ray Radebaugh, PhD, NIST; Graham Walker, PhD,
University of Calgary; Robert Fagaly, PhD, Conductus; Gerald Pruitt,
Hughes Electron Dynamics; and Ron Ross, JPL.
Each participant receives extensive course notes and the text,
"Low-Capacity Cryogenic Refrigerators", G. Walker and E.R. Bingham
(Oxford University Press, 1994).
This course provides a thorough introduction to cryocoolers (miniature
refrigerators used to achieve and maintain cryogenic temperatures of less
than 120K). It deals with both regenerative and recuperative cryocoolers,
with emphasis on such regenerative systems as the Stirling, Vuilleumier,
Gifford-McMahon, and pulse tube. Recuperative systems include the
Joule-Thomson, Brayton, and Claude cycle. Instruction focuses on smalland
intermediate capacity cryocoolers designed for infrared detectors,electronic
devices, superconducting sensors, superconducting magnets,and cryopumps. This
course does not cover large-scale industrialliquefaction turbine systems.
Fundamentals and operating principles of the mechanical regenerative
devices most often used for the 65-80K temperature range are explained,
especially in the context of the new high-temperature superconductors.
Multistage devices which achieve much lower temperatures are then
discussed. Design methods as well as construction techniques are
covered in detail. The latter part of the course deals with small and
intermediate recuperative systems, and addresses various alternative
non mechanical systems for temperatures ranging from 120K down to the
nanokelvin range. Magnetic refrigerators are also analyzed in this segment
of the course. Such application areas as infrared detectors,
superconducting quantum interference devices (SQUIDs), superconducting
magnets, maser and parametric amplifiers, computers, and high-temperature
superconductors are examined, with an emphasis on interfacing problems.
Two site visits are a highlight of the course. The first is to UCLA Professor
T.H.K. Frederking's laboratory where research on cryogenic heat transfer
and pulse tube refrigeration is being conducted. The second is to the Jet
Propulsion Laboratory in Pasadena, a major research and development
lab for unmanned spacecraft and a leader in cryocooler R&D.;
UCLA Extension has presented this highly successful short course since
1980.
The course fee is $1595, which includes the text and all course materials.
These materials are for participants only, and are not for sale.
_________
On March 3-4, 1997, UCLA Extension will present the short course,
"Cryogenic and Hydrogen Safety", on the UCLA campus in Los Angeles.
The instructors are Frederick J. Edeskuty, PhD, Los Alamos National
Laboratory; and Mark A. Daugherty, PhD, Los Alamos National Laboratory.
Each participant receives extensive course notes and the text, "Safety in
the Handling of Cryogenic Fluids", F.J. Edeskuty and W.F. Stewart (Plenum
Press 1996).
Safety for workers and/or the public is a vital consideration for any industrial
or laboratory operation. The cost of accidents is another factor to consider,
and where cryogenic systems are involved, equipment replacement costs
can be substantial compared to other systems.
This two-day course is intended for scientists, engineers, and technicians
involved in programs that make use of cryogenic fluids in any capacity, or in
the utilization of hydrogen as a fuel. The course should enable participants
to recognize the causes for potential hazards and methods to eliminate
them. Lectures are arranged so that the safe handling of cryogenic fluids
and the hazards of hydrogen as a cryogen are discussed on the first day.
The second day also addresses cryogenic fluids, but focuses on the
specific problems of handling hydrogen, either as a liquid or as a gas at
ambient temperature.
The course fee is $895, which includes the text and all course materials.
These materials are for participants only, and are not for sale.
____________
For additional information and a complete course descriptions, please
contact Marcus Hennessy at:
(310) 825-1047
(310) 206-2815 fax
mhenness@unex.ucla.edu
http://www.unex.ucla.edu/shortcourses
These courses may also be presented on-site at company locations.
Subject: Re: Graphite vs. Steel Golf Shaft
From: mdmiles@teleport.com (Michael D. Miles, PE)
Date: Fri, 22 Nov 1996 00:00:04 GMT
Erik Loehr wrote:
>Thomas Wynsen wrote:
>>
>> I have read that there is an advantage to ahving graphite vs. steel
>> shafts. Anyone care to ellaborate why this is. I assume steel is
>> stiffer. Isn't this better for a fairly fast swing?
>
>I'm no expert on this but I think that the advantage of using "graphite"
>shafts (really composite shafts) these days is that you can have a whole lot
>more control over the stiffness characteristics of the shaft. Ten years ago,
>graphite shafts were always the "whippy" type and were made for people
>with slow swings so they could increase club head speed. That is no longer
>true with modern graphite shafts.
As a golfer (as well as an ME) the case for the current embodiment of graphite shafts is two-fold:
1. Increased torque resistance - the shaft has far less flexure in rotation that allows the clubhead
to maintain squareness at impact.
2. Reduced weight in the shaft allows the club designers to balance the club differently. Some are
base weighted and light headed, others are heavy headed but with the light shaft, they have the same
swing weight as a steel shaft with a standard head. More mass at the impact point with the same
velocity means more force and therefore more distance.
The extra flex (bending) capability does indeed offer more distance and the increased torsional
rigidity combined with the extra flex provides some measure of control to go with the distance.
Most of the extra flex shafts were abandoned by the average golfer since they are difficult to hit
straight without a well grooved swing. The new 'super' clubs have begun to compensate more for
average swings and have become easier to hit.
I've played golf for over thirty years and it still astounds me that by swinging a stick with a lump
of metal on the end and hitting a round object with a curved face on the lump (and offset from the
centerline of the stick at that!), I can put that round object in a hole 400 yards away by only
hitting it 4 or 5 times (even less with a little luck). Something about the vagaries and tolerances
of each portion of the swing, impact, flight, landing, and roll-out make it seem impossible (of
course some times it IS impossible).
Has anyone ever done a sensitivity analysis on the game of golf?
Entropy Happens!
Michael D. Miles, PE
Consulting Design Engineer
mdmiles@teleport.com
