| Topic: |
Science > Physics |
| User: |
"Sam Wormley" |
| Date: |
25 Jun 2004 10:21:41 PM |
| Object: |
Dogs Catching Frisbee |
Ref: http://www.sciencenews.org/articles/20040626/mathtrek.asp
Science News - Week of June 26, 2004; Vol. 165, No. 26 , p. 405
Dogs Catching Frisbee
Some dogs are highly adept not only at retrieving but also at
catching in midair a tossed ball or Frisbee. To do so requires
the dog to be in the right place at the right time. How does a
dog navigate to snatch a Frisbee out of the air?
To find out, researchers attached a tiny video camera to the head
of each of two dogs to capture what the dogs could see as they
hunted, then intercepted Frisbees. They concluded that dogs
appear to use the same geometric strategy that a baseball fielder
employs to snag a fly ball hit into the outfield.
See: http://www.sciencenews.org/articles/20040626/mathtrek.asp
.
|
|
| User: "Boris Mohar" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 11:24:35 AM |
|
|
On Sat, 26 Jun 2004 03:21:41 GMT, Sam Wormley <swormley1@mchsi.com> wrote:
Ref: http://www.sciencenews.org/articles/20040626/mathtrek.asp
Science News - Week of June 26, 2004; Vol. 165, No. 26 , p. 405
Dogs Catching Frisbee
They can also:
http://www.skateboardingbulldog.com/
http://www.dogsinthenews.com/issues/0204/articles/020413a.htm
There are others
Regards,
Boris Mohar
Got Knock? - see:
Viatrack Printed Circuit Designs http://www3.sympatico.ca/borism/
.
|
|
|
|
| User: "Jim" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 12:16:16 AM |
|
|
Sam Wormley <swormley1@mchsi.com> wrote:
Ref: http://www.sciencenews.org/articles/20040626/mathtrek.asp
Science News - Week of June 26, 2004; Vol. 165, No. 26 , p. 405
Dogs Catching Frisbee
Some dogs are highly adept not only at retrieving but also at
catching in midair a tossed ball or Frisbee. To do so requires
the dog to be in the right place at the right time. How does a
dog navigate to snatch a Frisbee out of the air?
To find out, researchers attached a tiny video camera to the head
of each of two dogs to capture what the dogs could see as they
hunted, then intercepted Frisbees. They concluded that dogs
appear to use the same geometric strategy that a baseball fielder
employs to snag a fly ball hit into the outfield.
See: http://www.sciencenews.org/articles/20040626/mathtrek.asp
From the article:
"Basically, an outfielder selects a running path that allows him or
her to keep the image of the moving ball on the same part of the
retina."
"To get the desired result for a ball hit off to one side, for
example, the fielder would run along a curved path to cancel out the
curvature of the ball's trajectory."
"This fielding approach is known as the Linear Optical Trajectory
(LOT) model."
"Even when a Frisbee's direction changed dramatically, the dogs
continued to rely on the LOT strategy."
I have a Frisbee catching dog too. I've watched her catch
thousands of Frisbees.
I could have saved the Arizona State University West, and
Saint Anselm College a lot of research money, time and effort.
Had they asked, I could have told them that:
Frisbee catching dogs, look at the Frisbee and run after it!
Sheeesh! :)
Jim
.
|
|
|
| User: "Alfred Einstead" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 03:32:51 PM |
|
|
Jim <lose30lbs@workfromhome.com> wrote:
I have a Frisbee catching dog too. I've watched her catch
thousands of Frisbees.
I know, from experience working with a Rottweiler, that dogs
(or at least one dog) posses the following capabilities:
* They have object permanence -- they can tell when something
is hiding behind something else, and know the object is there.
* Linguistically, they have the corresponding ability (at least
to a limited degree) of knowing, for simple fill-in-the-blank
type sentences which word was intended to be spoken.
* They can also complete or anticipate the completion of a word
when only part of it is uttered
* They do not, however, understand embedded clauses, subordinate
clauses, or any other type of recursion; and do not understand
subjunctive mode (but then, neither do most English speakers).
* They can recognize and distinguish numbers at least up to 4.
In contrast, no language I'm aware of has indigenous terms for
numbers past 3 (Indo-European borrowed its terms either from
other sources, or from words denoting other items; e.g., the
root for five originally meant finger and to this day still
has a recognizeable similarity even to the modern English word).
* They have the ability to back up, away from obstacles; to
see alternative routes around them. They're able enough
to anticipate the actions of others to be able to stand and
wait for an obstacle to be cleared, when someone able-bodied
enough to do so is around.
* They can learn to predict an individuals' behavior and
anticipate what different individuals will do in response to
different things; and even adjust their behavior accordingly,
even to try and fake you out.
* They can understand and recognize words within the context of
continuous non-stop speech. They're able, to a limited degree,
to even pronounce simple words. They're also able to substitute
(both recognize and use) sign-language equivalents to words and
concepts.
* They have a passive vocabulary ranging around 100-200 words, and
have an active vocabulary, expressed primarily through sign language,
body language, different types of glances, etc., of dozens of words
or concepts.
* They have at least a limited ability to understand sensory verbs,
verbs denoting different types of actions, and even cognitive
verbs. They also have a limited ability to recognize who is
being talked about when reference is made to the person's
idiosyncratic behavior, even when the individual is not present.
* Overall, they show the same behaviors and level of cognition
(including tantrums, and obstinancy) of a 2-3 year old.
.
|
|
|
|
| User: "John Sefton" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 08:13:36 AM |
|
|
Jim wrote:
Sam Wormley <swormley1@mchsi.com> wrote:
Ref: http://www.sciencenews.org/articles/20040626/mathtrek.asp
Science News - Week of June 26, 2004; Vol. 165, No. 26 , p. 405
Dogs Catching Frisbee
Some dogs are highly adept not only at retrieving but also at
catching in midair a tossed ball or Frisbee. To do so requires
the dog to be in the right place at the right time. How does a
dog navigate to snatch a Frisbee out of the air?
To find out, researchers attached a tiny video camera to the head
of each of two dogs to capture what the dogs could see as they
hunted, then intercepted Frisbees. They concluded that dogs
appear to use the same geometric strategy that a baseball fielder
employs to snag a fly ball hit into the outfield.
See: http://www.sciencenews.org/articles/20040626/mathtrek.asp
From the article:
"Basically, an outfielder selects a running path that allows him or
her to keep the image of the moving ball on the same part of the
retina."
"To get the desired result for a ball hit off to one side, for
example, the fielder would run along a curved path to cancel out the
curvature of the ball's trajectory."
"This fielding approach is known as the Linear Optical Trajectory
(LOT) model."
"Even when a Frisbee's direction changed dramatically, the dogs
continued to rely on the LOT strategy."
I have a Frisbee catching dog too. I've watched her catch
thousands of Frisbees.
I could have saved the Arizona State University West, and
Saint Anselm College a lot of research money, time and effort.
Had they asked, I could have told them that:
Frisbee catching dogs, look at the Frisbee and run after it!
Sheeesh! :)
Jim
I dunno, man.
Our first retriever, Molly, got so she
could assess which way the frisbee would
curve and then take a straight line to the
intercept point.
She'd usually get there first
- the more the curve the sooner she was
there. She was awesome.
Our present dog seems
to employ the 'keeping it in the same place
in his vision' technique. He puts
on a whole lot more miles and catches
a lot fewer frisbees.
My assessment- dogs are dumb as hell,
even smart ones like Goldens.
John
.
|
|
|
| User: "John Sefton" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 08:52:12 AM |
|
|
John Sefton wrote:
Jim wrote:
Sam Wormley <swormley1@mchsi.com> wrote:
Ref: http://www.sciencenews.org/articles/20040626/mathtrek.asp
Science News - Week of June 26, 2004; Vol. 165, No. 26 , p. 405
Dogs Catching Frisbee
Some dogs are highly adept not only at retrieving but also at
catching in midair a tossed ball or Frisbee. To do so requires
the dog to be in the right place at the right time. How does a
dog navigate to snatch a Frisbee out of the air?
To find out, researchers attached a tiny video camera to the head
of each of two dogs to capture what the dogs could see as they
hunted, then intercepted Frisbees. They concluded that dogs
appear to use the same geometric strategy that a baseball fielder
employs to snag a fly ball hit into the outfield.
See: http://www.sciencenews.org/articles/20040626/mathtrek.asp
From the article:
"Basically, an outfielder selects a running path that allows him or
her to keep the image of the moving ball on the same part of the
retina."
"To get the desired result for a ball hit off to one side, for
example, the fielder would run along a curved path to cancel out the
curvature of the ball's trajectory."
"This fielding approach is known as the Linear Optical Trajectory
(LOT) model."
"Even when a Frisbee's direction changed dramatically, the dogs
continued to rely on the LOT strategy."
I have a Frisbee catching dog too. I've watched her catch
thousands of Frisbees.
I could have saved the Arizona State University West, and
Saint Anselm College a lot of research money, time and effort.
Had they asked, I could have told them that:
Frisbee catching dogs, look at the Frisbee and run after it!
Sheeesh! :)
Jim
I dunno, man.
Our first retriever, Molly, got so she
could assess which way the frisbee would
curve and then take a straight line to the
intercept point.
She'd usually get there first
- the more the curve the sooner she was
there. She was awesome.
Our present dog seems
to employ the 'keeping it in the same place
in his vision' technique. He puts
on a whole lot more miles and catches
a lot fewer frisbees.
My assessment- dogs are dumb as hell,
even smart ones like Goldens.
John
Come to think of it, Molly could pick up
a frisbee almost instantly by putting paws
on both sides and scooping the near
side up the paw and into her mouth.
Nicky still pushes with one paw
towards his mouth and tries
to get his lower canine under the edge
He has a hard time on hard, smooth surfaces,
and sometimes it's a long wait while he
slides it to and fro and whines.
Conclusion:
all dogs are not the same.
Some are stupider.
John
John
.
|
|
|
|
|
|
| User: "tj Frazir" |
|
| Title: Re: Dogs Catching Frisbee |
25 Jun 2004 10:35:29 PM |
|
|
the radar dish ?
Throwing it back and keeping score is what gets me =A1
.
|
|
|
| User: "Alfred Einstead" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 03:18:27 PM |
|
|
(tj Frazir) wrote:
the radar dish ?
Throwing it back and keeping score is what gets me
Getting the beer from the fridge and closing the door behind
them is what really amazes me. And when they go back,
after you tell them, "No <pooch-name-inserted>. I wanted
the Guiness, not the Bud.", they go back and get the right
one; well that just takes the cake.
.
|
|
|
|
| User: "" |
|
| Title: Re: Dogs Catching Frisbee |
25 Jun 2004 10:46:27 PM |
|
|
tj Frazir <GravityPhysics@webtv.net> wrote:
the radar dish ?
Throwing it back and keeping score is what gets me ?
Can we attach a small video camera to your head and perhaps find out why
it is you can't catch a clue?
--
Jim Pennino
Remove -spam-sux to reply.
.
|
|
|
| User: "Michael Varney" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 12:40:40 AM |
|
|
<jimp@specsol-spam-sux.com> wrote in message
news:cbirij$ngt$1@mail.specsol.com...
tj Frazir <GravityPhysics@webtv.net> wrote:
the radar dish ?
Throwing it back and keeping score is what gets me ?
Can we attach a small video camera to your head and perhaps find out why
it is you can't catch a clue?
It would have to be an awfully small camera. :-)
.
|
|
|
| User: "" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 09:33:39 AM |
|
|
On Fri, 25 Jun 2004 23:40:40 -0600, "Michael Varney"
<varney@colorado_no_spam.edu> wrote:
<jimp@specsol-spam-sux.com> wrote in message
news:cbirij$ngt$1@mail.specsol.com...
tj Frazir <GravityPhysics@webtv.net> wrote:
the radar dish ?
Throwing it back and keeping score is what gets me ?
Can we attach a small video camera to your head and perhaps find out why
it is you can't catch a clue?
It would have to be an awfully small camera. :-)
for a small head?
.
|
|
|
| User: "Michael Varney" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 11:15:29 AM |
|
|
<support@freewire.net> wrote in message
news:f6f1c30ce239e979243492a3cae3a286@news.teranews.com...
On Fri, 25 Jun 2004 23:40:40 -0600, "Michael Varney"
<varney@colorado_no_spam.edu> wrote:
<jimp@specsol-spam-sux.com> wrote in message
news:cbirij$ngt$1@mail.specsol.com...
tj Frazir <GravityPhysics@webtv.net> wrote:
the radar dish ?
Throwing it back and keeping score is what gets me ?
Can we attach a small video camera to your head and perhaps find out
why
it is you can't catch a clue?
It would have to be an awfully small camera. :-)
for a small head?
Yup.
.
|
|
|
| User: "MorituriMax" |
|
| Title: Re: Dogs Catching Frisbee |
26 Jun 2004 01:37:00 PM |
|
|
Michael Varney wrote:
for a small head?
Yup.
Hmm, how many hours of watching someone eat cheetos in a trailer can you stand?
.
|
|
|
|
|
|
|
|
|
|
Related Articles |
|
|
