HDTenEightyP/NetNews huggingface dataset:
From: gd@gehenna.sw.stratus.com (Greg Dawe)
Newsgroups: rec.scuba
Subject: Re: Nitrox Diving
Date: 17 Dec 1992 14:51:51 GMT
Organization: Stratus Computer, Software Engineering
NNTP-Posting-Host: gehenna.sw.stratus.com

In article <14899@cis.rand.org> schutz@rand.ORG (Karl Schutz) writes:
>A short while ago a friend of mine completed a nitrox class.  His first nitrox
>dive was a beach dive in Laguna Beach, CA.  As he and the instructor sashayed
>toward the water's edge, one of two bistanders noticed the green and yellow tanks
>with NITROX printed on them and questioned the other as to its meaning.  The
>other responded that it's that gas race car drivers use (obviously referring to
>nitro-class drag racing - Ed. :-) ).
>
>True story.

Oh, if that were only true!  Then I wouldn't need to be saving my pennies 
for a DPV.  Still, maybe we can find a cooperative dentist or two who will
provide us with a sample to do some experiments.  What do you think?  :-)
-- 
Greg Dawe                        | Disclaimer: I don't speak for my employer,
Voice : (508)-490-6666           |             nor they for me...
e-mail: Greg_Dawe@vos.stratus.com|            
Organization: Carnegie Mellon, Pittsburgh, PA
Newsgroups: rec.scuba
Date: Wed, 16 Dec 1992 14:06:15 -0500 
From: "Peter A. Simon" <ps3p+@andrew.cmu.edu>
Subject: Re: Nitrox Diving
	<1gi82aINNt38@transfer.stratus.com>

gd@gehenna.sw.stratus.com (Greg Dawe) writes:

>This leads to a second point, which you're probably aware of, but always
>seems to get left out of these types of discussions: the equipment must be
>oxygen compatible as well as oxygen cleaned.  There are some regulator
>first stages, and SCUBA cylinders that can't be used with high O2 fractions.
>In the case of the regulators I've run into, the problem is usually the 
>unavailability of compatible replacement parts (diagphrams, and in some cases
>an O-ring or two).

Does this information get disseminated in NITROX courses (I hope, I hope)?

Peter Simon
NAUI I #1434
Newsgroups: rec.scuba
From: lls@kings.demon.co.uk (Lady Lodge Systems)
Subject: Re: Diver Insurance (Was: Re: missing deco stop ... re-entering)
Organization: Lady Lodge Systems
Date: Sat, 19 Dec 1992 12:25:32 GMT

In article <1992Dec15.223016.27847@cs.su.oz.au> gregr@cs.su.oz.au  (Greg Ryan, g10b, xtn 4809) writes:
>In article <tjjbbgc@twilight.wpd.sgi.com>, story@sgi.com (David (Duis) Story) writes:
>
>What about our UK/European readers?  Is diver insurance available to you?
>

In the UK, there are some companies selling diver (medical) insurance
but this is mainly aimed at the diver going abroad.  

We are perhaps fortunate in the UK that, in general, we are only around
20 mins flying time from a recompression chamber and the
really-very-very-nice-people in the Air/Sea Rescue service will do the
trip in one of their pretty yellow helicopters when needed at no charge.
Also the chamber treatment is covered (paid for) by what remains of the
National Health System.  So, generally speaking, no costs are incurred.

It certainly makes one feel very good to know that a shout on the VHF
will have a helicopter over the dive site within a very short period of
time and the casualty (could be you!) will be in a recompression chamber
within one and a half hours from surfacing (time from memory but in the
right ballpark).

From personal experience of a diver being air evacuated to a chamber
from our dive boat, I am *very* impressed by the level of service and
speed of response.
-- 
Regards,
        Russell
 ---------------------------------------------------------------------------
| Russell Brown          | MAIL : russell@kings.demon.co.uk                 |
| Lady Lodge Systems     | PHONE: 0832 272224 (Home/Work it's all the same) |
| demon.co.uk is an Internet access point for zillions of unrelated systems |
 ---------------------------------------------------------------------------
Newsgroups: rec.scuba
Subject: Re: Snorkeling Crystal River
From: Steve Powell <SPOWELL@MIAMIU.BITNET>
Date: Sunday, 13 Dec 1992 18:47:14 EST
Organization: Miami University - Academic Computer Service

As to the place in northern Fla. that has interesting caves and rock
formations that was mentioned, I think that would be Ginnie Springs.  I
aslo did the Manatee snorkling in Crystal River, which was fun, but poor
vis. I also hit Royal and King Springs... and lastly Ginnie Springs.  The
best way to do Ginnie is to park at Ginnie, take a short hike to Devil's
Hole (which has some interesting caves) and drift dive down the river to
Ginnie.  On the way down the river there are several springs coming from
little caves (wouldn't recommend going to deep into them though.  Finally
arriving at Ginnie springs, take a break for food, then do Ginnie Springs
caves.  The water very clear, vis. great, and there is a large underwater
cavern that extends 150'horizontally before breaking off into caves.  I
just had a cheap 15.00 disposable camera, and most of my pictures there
came out great.  Good place to take Cave Diving specialty.


                                                 Steve
From: gd@gehenna.sw.stratus.com (Greg Dawe)
Newsgroups: rec.scuba
Subject: Wanted: UK dive club affiliation
Date: 17 Dec 1992 17:55:35 GMT
Organization: Stratus Computer, Software Engineering
NNTP-Posting-Host: gehenna.sw.stratus.com

To any UK net.divers:

The MetroWest Dive Club (MWDC), located near Boston, Massachusetts (USA) is
looking to develope an affiliation with a dive club in the UK.  The eventual
goal of the affiliation is to run an exchange program, where UK divers could 
come over and dive with us, and MWDC club members could reciprocate, and dive
in the UK.  Interested parties can contact me through e-mail at the address
listed below.
-- 
Greg Dawe                        | Disclaimer: I don't speak for my employer,
Voice : (508)-490-6666           |             nor they for me...
e-mail: Greg_Dawe@vos.stratus.com|
From: f_cnnghamjk@ccsvax.sfasu.edu
Newsgroups: rec.scuba
Subject: Re: SHARKS IN HAWAII
Date: 17 Dec 92 19:27:15 CST
Organization: Stephen F. Austin State University

In article <1992Dec17.043603.4928@nctams1.uucp>, 
0031b@pnet16.cts.com (Rmcs Falcone) writes:

>    I am one of those that firmly believe that we enter the sharks
> environment and we understand that from the start when we either
> dive, snorkel, or surf (including body surfing). It's their home.
> You kind of "ENTER UNDER YOUR OWN RISK".

"You enter the food chain when you enter the water" is the way I heard it.
                             ____
Randomly, Kelly Cunningham  (_/\_)
<deviate@lipschitz.sfasu.edu><f_cnnghamjk@ccsvax.sfasu.edu><jkellyc@tenet.edu>
 NeXTMail (favored) MIME (ok)     VMS Mail (tolerated)          MIME (ok)
Newsgroups: rec.birds,rec.pets.birds
From: ortega@cactus.org (Paul Ortega)
Subject: Pigeon bands
Organization: Capital Area Central Texas UNIX Society, Austin, Tx
Date: Sat, 19 Dec 1992 23:25:11 GMT


I found a band on one of the pigeons in the park.
It had the following stamped on it:

NPA 84 RC 113

There was also a second band on the other leg, a green plastic one
with the number "1".

Just for curiosity's sake, what does the above
mean?


-- 
Paul Ortega			|  "If one could be punched out through
2015 Cedar Bend Dr., #1105      |   a modem, rec.arts.comics.misc 
Austin, TX 78758		|   would be a hell of a lot different."
(512) 832-9197			|      -- Perry Stokes
Newsgroups: rec.birds
From: dp10@mc4adm.UWaterloo.ca (Derek Kirkland)
Subject: Re: USA:  Conflict in the Trenches ***
Organization: University of Waterloo
Distribution: rec
Date: Thu, 10 Dec 1992 14:07:39 GMT

It amazes me that some people would post political garbage like this on rec.birds. The
posting has nothing to do with birds. It appears to be the whining of people out of touch with
the world.                                                                         

Newsgroups: rec.birds
From: srh3@Ra.MsState.Edu (Steven R. Hollis)
Subject: Re: Falconry in Il.
Keywords: Beginner
Organization: Mississippi State University
Date: Wed, 16 Dec 1992 18:23:55 GMT

    As an apprentice, let me recommend a couple more good books that will be 
very beneficial to you taking your test.

  Audubons Field Guide will give good descriptions, as will Peterson's
Field Guide to North American HAwks.  both these will help on the test
As for cost....Hey, I'm a college student and I'm able to do it.  I found
that the most expensive part around here is building your facilities. But
compared to some hobbies, even that is very cheap.

   Oh, one other note on NAF&HH  I had to special order mine (since my college
is in the sticks) and it ran me around $60 but it is a good guide for care and 
training

   LAter
Steve 
--
============================================================================
Steve Hollis---Your friendly          |  "What for you say you monkey, when
neighborhood zoology major/lit minor  |   you got little powder puff tail
srh3@ra.msstate.edu                   |   like rabbit----RABBIT?"
From: bruceb@mpd.tandem.com (Bruce Burden)
Newsgroups: rec.birds
Subject: Attwater Prairie Chicken info
Date: 16 Dec 92 19:50:41 GMT
Organization: Tandem Computers (MPD) Austin, TX




	I don't have any personal experiences with Attwater, but here
    is what my information says:


	Address: Attwater Prairie Chicken National Wildlife Refuge
		 P.O. Box 518
		 Eagle Lake, TX. 77434
		 (409) 234-3021



	_Photographing Wild Texas_ states that there are approximately
     150 birds there, and as a rule the public is not permitted. Possible
     viewing is from a great distance, although it might be possible to
     obtain special permission in advance.


	_Birders Guide To Texas_ states that February 1 thru April 30
     are the best times to see the birds on the "booming grounds". Tours
     are by reservation only and begin at 7am. General visitation is from
     9am to 5pm, the marsh is sunrise to sunset. From May 1 to January 30,
     the whole area is open from sunrise to sunset. Christmas bird counts
     average 160+ species.




								Bruce




-------------------------------------------------------------------------------
  Bruce Burden            bruceb@mpd.tandem.com         Tandem Computers Inc.
Newsgroups: rec.birds
From: max@currawong.bhs.mq.edu.au (Max Coltheart)
Subject: Birding at Byron Bay
Organization: School of Behavioural Sciences, Macquarie University, Australia
Date: Sat, 19 Dec 1992 22:26:40 GMT

MaxC

Newsgroups: rec.birds
From: max@currawong.bhs.mq.edu.au (Max Coltheart)
Subject: Re: Birding at Byron Bay
Organization: School of Behavioural Sciences, Macquarie University, Australia
Date: Sat, 19 Dec 1992 22:35:20 GMT

I'll be spending Christmas through New Year in Byron Bay and would
greatly appreciate any tips about good birding spots in that vicinity
(fishing spots too!)

MaxC
From: willner@head-cfa.harvard.edu (Steve Willner)
Newsgroups: rec.birds
Subject: Re: New Optics FAQ
Date: 17 Dec 92 19:26:17 GMT
Organization: Smithsonian Astrophysical Observatory, Cambridge, MA,  USA


Thanks for the fine and valuable effort.  However:

In article <1992Dec16.142308.7998@verdix.com>, edm@verdix.com (Ed
Matthews) writes: 
> The wider the field-of-view, the better the instrument for picking up
> motion in the distance.

Or nearby, for that matter.

>  The narrower the field-of-view, the better the
> instrument is for closeups.

It might be better to say that _other things being equal_ (and except
for rare special cases), wider field is always better than narrower
field.  Of course, other things seldom are equal, and you generally
have to pay for wide FOV some other way: lower resolution, lower
magnification, less eye relief, greater weight, or higher cost.

The easiest way to compare fields of view of binoculars having
different magnification is to look at the "apparent" field of view.
This is just the actual FOV times the magnification.  Typical values
range from 45 to 75 degrees with most being between 50 and 65.  My
opinion is that anything above 65 is exceptional, while anything
below 50 is seriously flawed.

> 2.5 What about eyeglasses?

While the advice given is good, you might add "Look for eye relief of
at least 15 mm."
-- 
Steve Willner            Phone 617-495-7123         Bitnet:   willner@cfa
Cambridge, MA 02138 USA                 Internet: willner@cfa.harvard.edu
  member, League for Programming Freedom; contact league@prep.ai.mit.edu
From: ns@bohr.physics.purdue.edu (Nancy M. Schnepp)
Newsgroups: rec.birds
Subject: "Gingerbread Houses for the Birds"
Date: 15 Dec 92 14:47:18 GMT
Distribution: usa
Organization: Purdue University Physics Department


On our local news, they showed a teacher having his class
making edible "gingerbread" houses for the birds.  They had
to do some research and make sure everything in their houses
were bird edible.  They "glued" the houses together with
peanut butter.  Really a neat idea for the kids to do.
From: harle@hou281.chevron.com (A.R.Leeds)
Newsgroups: rec.birds
Subject: Re: Attwater Prairie Chicken info
Date: 17 Dec 92 13:42:28 GMT
Organization: Chevron

The observation blind at Attwater Prairie Chicken Nation Wildlife
refuge is permanently closed.

At one time, the Wildlife Refuge gave guided tours of the booming
grounds.  A few years ago, they switched to an unmanned observation
blind which was open from February through March.  I saw about 12
Greater Prairie Chickens (Tympanachus cupido attwateri) at once in
1990, and 2 in 1991.

Unfortunately, the prairie chicken population has declined dramatically
from around 200 in 1987 to 50 at present.  I called the refuge last week
to verify that the observation area is permanently closed to the public.  
It may reopen in some future year if the population recovers.  

There are still plenty of other birds at the refuge.  I have always seen
White-tailed Hawk (Buteo albicaudatus) and usually find Crested Caracara
(Polyborus plancus).  Last month I saw 20 caracara there.  Sprague's
Pipit (Anthus spragueii) is listed on their checklist as common in
winter and spring.  While I think that is optimistic, I have found them
on the refuge.  Dickcissel (Spiza americana) is common spring through
fall.  

There is a nice display of stuffed birds at the refuge headquarters,
which unfortunately is only open on weekdays.  The refuge itself is open
7 days a week.

For further information, contact
 	         Attwater Prairie Chicken National Wildlife Refuge
 		 P.O. Box 518
 		 Eagle Lake, TX. 77434
 		 (409) 234-3021
 
 
-- 
Alan R. Leeds                Phone:  (713)-596-2462
Chevron E&P Services         Internet:  harle@hou281.chevron.com
P. O. Box 42832
Houston, TX  77242
From: afong@sdcc13.ucsd.edu (Krell Kraver)
Newsgroups: rec.birds
Subject: Hummingbird wintering
Date: 21 Dec 92 05:00:14 GMT
Organization: University of California, San Diego

I seemed to have lost some information someone sent to me a little
while ago.  It was an address for a booklet on proper care and
feeding of outdoor hummingbirds.  I was specifically interested in
the rumor I heard that you're supposed to cease feeding them in the
late fall so that they'll migrate before conditions get tough.

Any help is 'preciated!
Newsgroups: rec.birds
From: lp@well.sf.ca.us (Lily Pond)
Subject: Drunken Robins
Organization: Whole Earth 'Lectronic Link
Date: Mon, 21 Dec 1992 02:15:31 GMT


So does all eating of red berries make robins drunk? And if not which and
when? Thanks.
From: jfinger@adobe.com (Jeff Finger)
Newsgroups: rec.birds
Subject: I Recant
Date: 13 Dec 92 00:39:59 GMT
Distribution: ba
Organization: Adobe Systems, Inc., Mountain View, CA

A few weeks ago, this novice birder described a previously unknown
species of duck --- coloring identical to a female Goldeneye, but
smaller than a Ruddy, and with a more sloping forehead than a Goldeneye.
A number of rec.bird'ers were nice enough to write me and tell me that
it sounded like a Goldeneye anyway.

Well, in the meantime, I have had the opportunity to see numerous
Goldeneyes, and I am now quite convinced that my mysterious new species is
indeed a Goldeneye female. So, mystery solved, my face is a bit red, and
as always, I thank you for your help.

-- Jeff Finger --
From: grego@bit.UUCP (Greg Sanguinetti)
Newsgroups: rec.audio
Subject: Re: Help? Surround Sound Amplifiation Suggestions
Date: 14 Dec 92 16:26:11 GMT
Article-I.D.: bit.530
Reply-To: grego@bit.UUCP (Grego Sanguinetti)
Distribution: usa
Organization: BIT  Portland, OR

In article <1992Dec12.134641.8886@lmpsbbs.comm.mot.com> A10035@email.mot.com (Scott Lindsey) writes:
>In article <1992Dec11.223855.19544@speedy.aero.org>, jcd@punch (John C. Davis) writes:
>> I have an investment in my stereo and would like to upgrade to Dolby Pro  
>> Logic ...
>... But I haven't seen a system which takes a hi-fi stereo input and puts out
>five line level outputs...

The Carver CT-17 tuner/preamp does this although it lists for about $800 as
I remember. I believe they also make a standalone pro-logic decoder. I have
the CT-17 and recommend it.

It includes video switching, which I don't use now. I can't recall if
it includes a MTS decoder. I run the audio outs from my TV and/or VCR
into it.

-grego
-- 
---------------------------------------------------------------------------
Grego Sanguinetti, Bipolar Integrated Technology | Water, water everywhere,
grego@bit.uucp or grego%bit%ogi.cse.edu          | but I'd rather drink
or bit!grego@ogi.cse.edu or ...!ogicse!bit!grego | beer.
Newsgroups: rec.audio
From: ianchan@leland.Stanford.EDU (Ian Hin Yun Chan)
Subject: Re: Class C amplifiers, says Mr. Pierce.
Organization: DSG, Stanford University, CA 94305, USA
Date: Thu, 17 Dec 92 09:07:26 GMT

In article <1goubrINNlf5@uwm.edu> randyd@csd4.csd.uwm.edu (Randall Elton Ding) writes:

* stuff deleted *

>I worked on a class C amp in the military, it was an old tube type sonar
>transmitter with big 4PR60 tubes for the output stage.  The tubes were biased
>so high that only the top 1/3 of the waveform was amplified.  You could
>get away with this type of biasing since the amp was only designed to
>amplify a single frequency, 8KHz I think.
>
>There is no way you can use a class C amp for audio, period.
>And why would you want to.
>
>Randy.

Well, 8kHz is audio, isn't it?  ;)
- Ian
From: jap1@ns1.cc.lehigh.edu (JOSEPH ALEXANDER PADULA)
Newsgroups: rec.audio
Subject: DCC and MD Quality
Date: 17 Dec 92 19:27:44 GMT
Organization: Lehigh University

It is a sad day indeed when "CD quality" is the aspiration for new media.
From: kishon-amir@cs.yale.edu (Amir Kishon)
Newsgroups: rec.audio
Subject: What's so great about CAL Sigma?
Date: 18 Dec 1992 10:35:15 -0500
Organization: Yale University Computer Science Dept., New Haven, CT 06520-2158
Distribution: world
NNTP-Posting-Host: systemsz-gw.cs.yale.edu

What's so great about CAL Sigma?

I auditioned yesterday a system that comprises of 1.5 Meggies, Acurus
DIA100 and California Audio Labs Icon Mk II. After I fell in love with
the system I realized that part of the magic was due to a DAC
,namely California Audio Labs Sigma DAC, connected to the CAL CD Player.
This was a surprise since I always thought that the CD is the least
important part of the system. I am curious to know if a DAC can really make
such a difference or I should just readjust my ears.

-- 
Amir Kishon                                 ARPA:   kishon-amir@cs.yale.edu
              				            kishon-amir@yale.arpa
					    BITNET: kishon-amir@yalecs.bitnet
                   			    UUCP:   decvax!yale!kishon-amir
From: matthews@eecs.ucdavis.edu (Thomas W. Matthews)
Newsgroups: rec.audio
Subject: Re: Crossover question
Date: 18 Dec 92 19:35:30 GMT
Organization: Division of Electrical Engineering and Computer Science, UC Davis


 kevins@eng.auburn.edu (Kevin Sullivan) has asked about the effects
of adding a resistor in series with a tweeter that has a passive
crossover of first order.  The "crossover frequency" of the tweeter is then 
calculated to be lower, and there is then a question of too
much power being delivered to the tweeter.

A crude graph follows.  Let X represent frequency response without the 
20-Ohm resistor, and let O represent the response with the resistor in series:


                                      X X X X X X X X X X X X X 
                                   X  
                                 X
                               X
                             XO O O O O O O O O O O O O O O O O O
                           XO
                         XO
                       XO                
                     XO
                   XO        ^       ^
                            f1       f2


Let's define a term called "lower corner frequency".  It is the
frequency at which the tweeter's signal is -3 dB from the level
it has well above the lower corner frequency (its maximum level in
that particular circuit).

The tweeters lower corner frequency without the serier resistor is 
f2.  With the series resistor, the lower corner frequency (measured
with respect to the lowered maximum output level) is f1.  Note that the
response curve for the series resistor added nowhere exceeds the response
curve without the resistor, even though f1 is lower than f2.

Hence if the tweeters are safe without the series resistor, they are
safer with it.

Although it is common to say "the tweeter is crossed over at . . ."
and then give the lower corner frequency of the filter, the frequency
at which the two drivers actually have equal output depends on the
response of the LF driver.

If a constant-impedance attenuator is used between the cap and the speaker,
then the entire response curve just shifts down.  This would represent
some added protection.  For tweeters using a higher-order crossover,
a constant-impedance pad should be used, or the crossover redesigned for
the different impedance.

Tom Matthews
From: aclark@53iss5.Waterloo.NCR.COM (Allen Clark)
Newsgroups: rec.audio
Subject: Cheap Place to buy a Portable CD Player
Date: 17 Dec 92 21:44:35 GMT
Organization: Imaging Systems Division, NCR Corp, Waterloo, Ont., CANADA

I was wondering what the net opinion was on the cheapest place in
either the U.S.A. or Canada to buy audio equipment.  Email to me and
I'll post a summary.

allen.clark@waterloo.ncr.com
--
From: co940@cleveland.Freenet.Edu (Nicholas E. Damato)
Newsgroups: rec.audio
Subject: Re: Help with shelf system
Date: 18 Dec 1992 18:54:22 GMT
Organization: Case Western Reserve University, Cleveland, Ohio (USA)
NNTP-Posting-Host: hela.ins.cwru.edu


kieth,
If your amp only puts out 30 watts (what's the headroom?) I wouldn't
bother with an unpowered subwoofer, it might overdrive the amp
(i.e. suck out too much current) as for the speakers, you can get
a nice pair of 8ohm speakers (e.g. paradigm titans @ $150 or so) and
wire an 8 ohm 50w non-inductive resistor (about $5 from a supply
house) in series with each speaker. If you use 8 Ohms where 16
ohm minimum is reccomended, you might cook your output stages
over a period of time (that's what happened to my brother's amp 
when he used too little impedance) and you will be able to put
out less power before clipping sets in. That's my OPINION anyways.
hope this helps out.
ned.
Xref: sparky rec.audio:16799 rec.video:14791
From: strong@tc.fluke.COM (Norm Strong)
Newsgroups: rec.audio,rec.video
Subject: Re: Any Recommandations for Subwoofer around $300?
Date: 16 Dec 92 15:20:09 GMT
Distribution: na
Organization: John Fluke Mfg. Co., Inc., Everett, WA

In article <1992Dec13.105318.12003@noose.ecn.purdue.edu> leejun@stable.ecn.purdue.edu (Jun H Lee) writes:
}Could anyone recommand nice subwoofer for around $300?

Yes, of course.  I recommend a nice subwoofer for around $300. 

}Thanks alot...

You're welcome


-- 

Norm Strong  (strong@tc.fluke.com)
2528 31st S.   Seattle WA 98144   USA