Date: Fri, 8 Aug 2003 12:57:29 -0600

Author: Brian Jones

Subject: Re: Student Response Systems...

Post:

Kaye:

Could I get 4 tickets for next week, so that we (Adam, Sheila, me,
Hyun Woo) could join the Koreans at dinner on Wednesday?

Thanks!

Brian

>We are in a similar position and have tentatively chosen the PRS system
>distributed by EduCue. It is an IR system that has been around for a
>while. The thing we can't decide on is how to handle getting the
>remotes to the students. The options seem to be to have the bookstore
>sell the remotes to the students and then have them register through
>some type of web interface (some systems are more geared to this model
>than others) or have a set in the department that students pick up as
>they come into class. Any further insights on the pros and cons of this
>issue would be very helpful.
>
>Thanks,
>Mike Timmins
>--
>Mike Timmins
>Department of Physics
>382 McCormick Rd
>University of Virginia
>Charlottesville, VA 22904-4714
>Voice: (434)924-6800
>e-mail:mat3q@virginia.edu
>
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>Message-ID: <3F046910.7090302@vt.edu>
>Date: Thu, 03 Jul 2003 13:34:08 -0400
>From: Clark Snelgrove
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>Subject: Re: Student Response Systems...
>References: <3F032BB7.30100@unity.ncsu.edu>
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>I would be very interested in the opinions of those out there that
>are using Group response systems. We are going to purchase one for
>a new 225 seat lecture hall. Any ideas about which systems are good
>and how they are managed (controll of romotes, IR vs FM radio, etc.)
>
>Thanks
>Clark Snelgrove
>Physics Education Research Associate
>Virginia Tech-Physics


--
*************************

Brian Jones
Physics Department
Colorado State University
Ft. Collins, CO 80523
(970) 491-5131
(970) 491-7947 FAX
bjones@lamar.colostate.edu

*************************
From alba@physics.rutgers.edu Fri Aug 8 15:49:22 2003
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Date: Fri, 8 Aug 2003 15:50:54 -0400 (EDT)
From: Gabe Alba
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Subject: Re: using PED's on planes
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CD and DVD players have RF amplifiers in the system that converts bit
information from the laser to the analog data stream. There is also
some radiation from the drive motor, but the frequency is much lower and
shouldn't affect communications.

Anthony, I didn't get a chance to meet you in Madison. I got to meet your
wife (her name tag indicated she was from Jersey too), but you were
talking to someone else and we never crossed paths again.

Gabe Alba
Physics Lab Manager
Rutgers University
Serin 202W
732-445-0068

On Fri, 8 Aug 2003, Anthony Lapinski wrote:

>As I was flying back to Jersey from Madison, I heard the flight attendants
>say that portable electronic devices could not be used at certain times
>(usually before/during/after takeoff, and well before landing). I guess
>radio transmissions between the ground and pilot may get disrupted. I can
>see why operating a cell phone would not be good, but what about other
>devices such as walkman's, CD players, computers, and portable electronic
>games? How could playing a battery-operated CD player interfere with
>anything?
>
>
From gary@phys.columbia.edu Fri Aug 8 16:01:23 2003
Date: Fri, 8 Aug 2003 15:37:12 -0400 (EDT)
From: Gary Steinberg
To: tap-l@listproc.appstate.edu
Subject: Video Capture and Slow-Motion playback
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Hello,
I've been trying to find information about what kind of video
capture systems are on the market. We're looking for something that can
record demos (like shoot the monkey), play them back in slow motion, and,
hopefully, allow some level of analysis, ideally, position, velocity, and
acceleration plots. Does anyone know of anything?

Thanks,
Gary Steinberg
Columbia University
From gnper090@wviz.org Fri Aug 8 16:02:12 2003
From: "Dick Heckathorn"
To:
Subject: RE: cleaning table tops
Date: Fri, 8 Aug 2003 16:04:27 -0400
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Greetings,
Have you checked with your custodial department? Ours at school have
some stuff that will take off almost anything.

Dick

"Science is nothing more than learning how to communicate with nature in
such a manner that it will talk back."

Helping teachers who facilitate, motivating students who learn.
Dick Heckathorn 14665 Pawnee Trail Middleburg Hts, OH 44130
440-826-0834
Physics Teacher CVCA 4687 Wyoga Rd Cuyahoga Falls, OH 44224
330-929-0575 VM 120

-----Original Message-----
From: owner-tap-l@listproc.appstate.edu
[mailto:owner-tap-l@listproc.appstate.edu] On Behalf Of Kail Secrest
Sent: Friday, August 08, 2003 12:47 PM
To: tap-l@listproc.appstate.edu
Subject: cleaning table tops

Hello everyone!

We would like to clean our old table tops that are covered with 35 years
worth of oil from hands. We have those older tables that are dark green
and very heavy, but
they are not composed of stone or epoxy. Does anyone still have these
and have any ideas how to clean them? So far we have tried Soft Scrub
and Windex with a plastic foam-like scrubbing pad, but it has done
little.

Any help would be appreciated!

Thanks,

Kail Secrest
Ohio Wesleyan University-Physics Dept.
Delaware, Oh 43015
740.368.3775


------=_NextPart_000_0030_01C35DC6.CD859F60
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xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
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charset=3DUS-ASCII">











style=3D'tab-interval:.5in'>



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Greetings,
<=
/p>

style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Have you checked with your =
custodial department?
Ours at school have some stuff that will take off almost =
anything.



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'>Dick



style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 





style=3D'mso-bidi-font-weight:
normal'> style=3D'font-size:
10.0pt;color:blue;font-weight:bold;mso-bidi-font-weight:normal;mso-no-pro=
of:
yes'>"Science is nothing more than learning how to communicate with =
nature
in such a manner that it will talk =
back."



size=3D2
color=3Dblue face=3D"Times New Roman"> style=3D'font-size:11.0pt;color:blue;
font-weight:bold;mso-bidi-font-weight:normal;mso-no-proof:yes'> =
;



style=3D'mso-bidi-font-weight:
normal'> style=3D'font-size:
10.0pt;color:blue;font-weight:bold;mso-bidi-font-weight:normal;mso-no-pro=
of:
yes'>Helping teachers who facilitate, motivating students who =
learn.



size=3D1
color=3Dblue face=3D"Times New Roman"> style=3D'font-size:8.0pt;color:blue;
mso-no-proof:yes'>Dick Heckathorn  =
14665
Pawnee Trail  Middleburg =
Hts, OH style=3D'mso-spacerun:yes'> 
44130 style=3D'mso-spacerun:yes'> 
440-826-0834



size=3D1
color=3Dblue face=3D"Times New Roman"> style=3D'font-size:8.0pt;color:blue;
mso-no-proof:yes'>Physics Teacher CVCA style=3D'mso-spacerun:yes'> 
4687 Wyoga Rd  =
Cuyahoga Falls, OH
44224  330-929-0575 style=3D'mso-spacerun:yes'> 
VM =
120





style=3D'font-size:
10.0pt;font-family:Arial;color:blue'> 



face=3DTahoma> style=3D'font-size:10.0pt;font-family:Tahoma'>-----Original =
Message-----

From:
owner-tap-l@listproc.appstate.edu =
[mailto:owner-tap-l@listproc.appstate.edu] style=3D'font-weight:bold'>On Behalf Of Kail Secrest

Sent: Friday, August 08, =
2003
12:47 PM

To: =
tap-l@listproc.appstate.edu

Subject: cleaning table =
tops



face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 





face=3DArial> style=3D'font-size:10.0pt;font-family:Arial'>Hello =
everyone!







face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 







face=3DArial> style=3D'font-size:10.0pt;font-family:Arial'>We would like to clean our =
old table
tops that are covered with 35 years worth of oil from hands. We have =
those
older tables that are dark green and very heavy, =
but







face=3DArial> style=3D'font-size:10.0pt;font-family:Arial'> they are not composed =
of stone
or epoxy. Does anyone still have these and have any ideas how to clean =
them? So
far we have tried Soft Scrub and Windex with a plastic foam-like =
scrubbing pad,
but it has done little.







face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 







face=3DArial> style=3D'font-size:10.0pt;font-family:Arial'>Any help would be =
appreciated!







face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 







face=3DArial> style=3D'font-size:10.0pt;font-family:Arial'>Thanks, o:p>







face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 







face=3DArial> style=3D'font-size:10.0pt;font-family:Arial'>Kail Secrest

Ohio Wesleyan University-Physics Dept.

Delaware, Oh  43015

740.368.3775







face=3D"Times New Roman"> style=3D'font-size:12.0pt'> 











------=_NextPart_000_0030_01C35DC6.CD859F60--

From klopcict@kenyon.edu Fri Aug 8 16:38:26 2003
Message-ID: <00c701c35ded$38c89e50$52291c8a@K02406>
From: "J. Terrence Klopcic"
To:
References:
Subject: Re: Video Capture and Slow-Motion playback
Date: Fri, 8 Aug 2003 16:39:53 -0400
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Hi Gary,

We bought VideoPoint software (by Lenox) last year and are rather pleased
with it. It has some glitches which I understood that they were working on.
(I'm disappointed that we haven't heard anything from Lenox in the past
year, in spite of our expressing interest in the project, sending in bug
reports, offering to beta test, etc.)

However, the software itself is already pretty cool. Capture works with
newer operating systems (couldn't get the capture to work under NT, but had
no problem with Win2K.) The analysis stuff does work under NT, and allows
multiple point tracking, multiple coordinate systems, does handy graphing
and fitting. It even has the ability to specify moving coordinate systems,
which might be handy for center of mass demos. (We export our data to
another data depiction program, Origin, for that analysis - but it could be
done right there in VideoPoint.) With VidoePoint's multicolored dots, the
shoot-the-target (ecologically correct rename for the classic demo) demo
looks really neat. A very clear picture of what is happening unfolds when
you take a coordinate system and align an axis between the gun and the
target. It is very obvious that the projectile deviates from that straight
line exactly as the target deviates from its starting point at the end of
the line.

Enjoy.

Terry






----- Original Message -----
From: "Gary Steinberg"
To:
Sent: Friday, August 08, 2003 3:37 PM
Subject: Video Capture and Slow-Motion playback


> Hello,
> I've been trying to find information about what kind of video
> capture systems are on the market. We're looking for something that can
> record demos (like shoot the monkey), play them back in slow motion, and,
> hopefully, allow some level of analysis, ideally, position, velocity, and
> acceleration plots. Does anyone know of anything?
>
> Thanks,
> Gary Steinberg
> Columbia University
>
>
From steve.anderson@SONOMA.EDU Fri Aug 8 17:17:36 2003
Date: Fri, 08 Aug 2003 14:19:01 -0700
From: Steve Anderson
Subject: Re: particle nature: dim photograph
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on 8/8/03 10:58 AM, Jason St. John at stjohn@buphy.bu.edu wrote:


>> I have a faculty member in my office who is wondering if he has invented
>> this:
>> A photograph in dim ambient light that shows speckling.

In my experience with film & low light levels, this speckle pattern is
referred to as random noise. It can also be affected by the
processing (like, hot developer or pushing a stop). It would be nice if he
could un-invent it!
For single photon counting, one needs time resolution, not the longer
integration of even hyper-sensitized film.
A pmt and spectrometer with a plot of wavelength vs. counts, doing a
long "dark" also gives random speckle, or shot noise, which you
can threshold with the gain control and/or tube voltage (and exposure
time in ms).

>> Can this be done with a polaroid, maybe?

Polaroid film is generally less sensitive. So, it can be done by
adjusting the "dim" ambient level up a stop or two ("up" meaning make
brighter). It's dynamic range is less than some, so the convenience in
processing is offset by more difficulty getting exactly the right exposure
time / light level. I would go with more sensitive instead of less sensitive
film. We have used a partial hydrogen atmosphere in an oven to push film
from 400 to 3200 or "hyper'd".

>> Is it also possible to do with severe attenuation, say, maybe by neutral
density filters?

Same difference, but any pinholes or defects in the ND filter will make a
more "systematic" noise pattern, if you are truly at the exposure threshold.
Using the filters gives you some control, which is what it sounds like you
are seeking. If you stack them, you can get TIR and/or "wood grain" or
moire noise.
Try crossed high quality polarizers, if your random ambient is truly that,
these will go pretty low, like ND 6.
Another nice tool is a five-step exposure mask (to identify
exposure times, available at photo stores). some links;

http://www.stsci.edu/stsci/meetings/adassIV/vanstoned.html
http://www.databank.oxydex.com/laser_updates_b/Projection_exposure.html

steve anderson, lab guy
CSU Sonoma
From dchenry@gac.edu Fri Aug 8 21:51:29 2003

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