Skip to content

SANParks.org Forums

View unanswered posts | View active topics






Post new topic Reply to topic  Page 55 of 61
 [ 907 posts ]  Go to page Previous  1 ... 52, 53, 54, 55, 56, 57, 58 ... 61  Next
Author Message
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Fri Dec 04, 2009 8:06 pm 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Feb 25, 2009 9:38 pm
Posts: 5208
Location: Johannesburg
:whistle:

_________________
He is rich or poor according to what he is, not according to what he has. ~Henry Ward Beecher


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sat Dec 05, 2009 9:47 am 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Jan 02, 2008 4:57 pm
Posts: 3183
Location: Randburg, SA
Quote:
A new model of a mobility aid for the blind was designed using microprocessor and ultrasonic devices

Quote:
In this model, a downswept FM ultrasound signal is emitted from a transmitting array with broad directional characteristics in order to detect obstacles.


The ultrasound reflections are then picked up and evaluated by a two channel receiver.
Quote:
The frequency of the emitted ultrasound is swept from 70 to 40 kHz within 1 ms, so it has almost the same characteristics as the ultrasound a bat produces for echolocation
.
The blind person is then able to listen to these sounds through earphones. They can also determine how far away the object is as well as its size once they have mastered the technology.
Quote:
With it a blind person can recognize a 1-mm-diameter wire.

:shock: :shock: amazing how technoloogy can improve the lives of those less fortunate :dance: It has been so succesfull that the individual can also interopret several objects around them and navigate through them

_________________
The beginning of knowledge is the discovery of something we do not understand.

"We are what we repeatedly do. Excellence, then, is not an act, but a habit." Aristotle


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sat Dec 05, 2009 11:06 am 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Feb 25, 2009 9:38 pm
Posts: 5208
Location: Johannesburg
Thanks for taking the trouble to look this up Ods; :thumbs_up: Isn't it amazing where technology
is taking us!

There is also this article I found interesting about a revolutionary walking cane that
does something similar.

'Batcane' link

_________________
He is rich or poor according to what he is, not according to what he has. ~Henry Ward Beecher


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sat Dec 05, 2009 11:52 am 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Jan 02, 2008 4:57 pm
Posts: 3183
Location: Randburg, SA
It is amazing! wow what an interesting article, thanks :thumbs_up: :thumbs_up:

_________________
The beginning of knowledge is the discovery of something we do not understand.

"We are what we repeatedly do. Excellence, then, is not an act, but a habit." Aristotle


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sat Dec 05, 2009 5:04 pm 
Offline
Senior Virtual Ranger
Senior Virtual Ranger
User avatar

Joined: Sun Mar 08, 2009 9:37 pm
Posts: 7460
Location: Daar waar die bobbejane hul borshare kam
Awesome stuff - and so great for visually challenged people! Tx for great info, S & Ods. :thumbs_up: :clap:

_________________
“Life is too short to wake up with regrets. So love the people who treat you right. Forget about those who don’t.” - Harvey MacKay


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sun Jan 24, 2010 4:33 pm 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Feb 25, 2009 9:38 pm
Posts: 5208
Location: Johannesburg
As a rule fruit bats (Eidolon helvum) roost about a wingspread apart from one another.
However, there is an event that takes place every year in southern Africa that causes this
to change, and the bats are said to roost so distinctively, that "from a distance they look
like swarms of honeybees, their densely packed brown bodies hanging from every bole and
branch of every tree and even from one another." What event is this, and where does it
take place?

_________________
He is rich or poor according to what he is, not according to what he has. ~Henry Ward Beecher


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Thu Jan 28, 2010 10:43 pm 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Feb 25, 2009 9:38 pm
Posts: 5208
Location: Johannesburg
:whistle:

_________________
He is rich or poor according to what he is, not according to what he has. ~Henry Ward Beecher


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Thu Jan 28, 2010 11:35 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Wed Aug 31, 2005 12:28 am
Posts: 14267
Location: Pretoria, RSA
I found this:

Quote:
Distribution: The Walberg's epauletted fruit bat can be found in Africa, anywhere south of the Sahara desert. These bats live in woodland and savannah areas, and prefer the edges of forests. During the summer, they migrate in large numbers to Tzaneen, in the Soutpansberg district of South Africa, attracted by the ripening crop of guavas.


:huh:

_________________
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparkshr.org


One positive deed is worth more than a thousand critical words.


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Thu Jan 28, 2010 11:53 pm 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Feb 25, 2009 9:38 pm
Posts: 5208
Location: Johannesburg
Good answer Imberbe! Close, I'm looking for a larger annual migration. :lol:

_________________
He is rich or poor according to what he is, not according to what he has. ~Henry Ward Beecher


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sun Feb 07, 2010 10:07 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Tue Dec 23, 2008 5:22 am
Posts: 21589
Location: Midway between the infinite and the infinitesimal!
:hmz:

_________________
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Fri Feb 26, 2010 9:24 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Wed Aug 31, 2005 12:28 am
Posts: 14267
Location: Pretoria, RSA
:huh:

_________________
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparkshr.org


One positive deed is worth more than a thousand critical words.


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Fri Feb 26, 2010 9:35 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Tue Dec 23, 2008 5:22 am
Posts: 21589
Location: Midway between the infinite and the infinitesimal!
Was a great Q ... what's the answer, Siobain? Please.

_________________
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Fri Feb 26, 2010 10:17 pm 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Wed Aug 31, 2005 12:28 am
Posts: 14267
Location: Pretoria, RSA
Are you thinking of the annual gathering next to the Musola river in the Kasanka national park in Zambia?

They arrive from the Congo in time for the rainy season, due to the huge numbers of fruit available in the area. They weigh approx. 700 gram each ... but are known to break tree branches, because of the numbers congregating in the sleeping areas.

WEG Magazine March 2010 has a nice article.

_________________
Imberbe = Combretum imberbe = Leadwood = Hardekool = The spirit of the Wildernis!

Want to know more about the SANParks Honorary Rangers? Visit www.sanparkshr.org


One positive deed is worth more than a thousand critical words.


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Fri Feb 26, 2010 10:26 pm 
Offline
Virtual Ranger
Virtual Ranger
User avatar

Joined: Wed Feb 25, 2009 9:38 pm
Posts: 5208
Location: Johannesburg
Thanks Imberbe, yes the arrival of the bats to Zambia's Kasanka National Park usually in October.

Known as one of the great wildlife wonders, it is said that up to 8,000,000 Fruit Bats arrive.
a truly spectacular occurrence, here is the
LINK

_________________
He is rich or poor according to what he is, not according to what he has. ~Henry Ward Beecher


Top
 Profile  
 
 Post subject: Re: Bat Quiz (OQ)
Unread postPosted: Sun Feb 28, 2010 7:05 am 
Offline
Distinguished Virtual Ranger
Distinguished Virtual Ranger
User avatar

Joined: Tue Dec 23, 2008 5:22 am
Posts: 21589
Location: Midway between the infinite and the infinitesimal!
Wonderful Q, Siobain. :clap: Fascinating stuff - must be a sight to savour!

Well done, Imberbe. :clap:

_________________
EVERYBODY'S TR!
TR: A NEW DAY IS S-OWN
TR: NECTAREAN NICETIES OF THE NORTH
TR: PRIMEVAL PLEASURE

"Outside of a dog, a book is a man's best friend. Inside of a dog, it's too dark to read." (Groucho Marx)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 907 posts ]  Go to page Previous  1 ... 52, 53, 54, 55, 56, 57, 58 ... 61  Next



Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group

Webcams Highlights

Addo Nossob Orpen Satara
Addo Nossob Orpen Satara
Submitted by Shiba at 06:05:14 Submitted by Anonymous at 08:56:44 Submitted by CarolynR at 09:58:37 Submitted by rolle at 09:38:01