Re: [Texascavers] [SWR CAVERS] Pentagon Seeks Laser-Powered Bat Drones

[Ken Harrington via Texascavers]

Lee, It would take very large passages as the laser beam that powers them would 
come from an aircraft flying above them.
Ken

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From: swrcav...@googlegroups.com  on behalf of Lee 
H. Skinner 
Sent: Sunday, January 7, 2018 6:23:43 PM
To: New Mexico Cavers; Texas Cavers; Sandia Grotto
Subject: [SWR CAVERS] Pentagon Seeks Laser-Powered Bat Drones

If these can carry LiDAR, will it be the future of cave exploration? :-)

http://www.defenseone.com/technology/2018/01/pentagon-seeks-laser-powered-bat-drones/144964/

Lee Skinner

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Re: [Texascavers] [SWR] Karst on Titan

[Ken Harrington via Texascavers]

ET,  

I understand that hotels are scarce there.

Ken

Life isn't about waiting for the storm to pass - It's about dancing in the 
rain. 
 



Date: Sun, 21 Jun 2015 16:14:37 -0500
From: karstpat...@gmail.com
To: skin...@thuntek.net
CC: s...@caver.net; texascavers@texascavers.com; sandiagro...@caver.net
Subject: Re: [SWR] Karst on Titan


Let's ask George Veni to have the next sinkhole conference there. ET
On Jun 21, 2015 2:52 PM, Lee H. Skinner skin...@thuntek.net wrote:


Karst areas with sinkholes have been found on Saturn's moon Titan.  See:

http://www.sciencedaily.com/releases/2015/06/150620213329.htm

Anyone care to speculate what the underlying bedrock and caves would be like?  
:-) 

Lee Skinner

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Re: [Texascavers] [SWR] Huge Lava Tubes Could Exist on the Moon

[Ken Harrington via Texascavers]

Lee,
 
Isn't it obvious that you would use Lunar Lights??
 
Ken 

Life isn't about waiting for the storm to pass - It's about dancing in the 
rain. 
 
Date: Fri, 20 Mar 2015 11:24:52 -0600
From: skin...@thuntek.net
To: s...@caver.net; texascavers@texascavers.com; sandiagro...@caver.net
Subject: [SWR] Huge Lava Tubes Could Exist on the Moon


  


  
  
How would one survey such a cave?  What types of light would you
use?   :-) 



http://spaceref.com/moon/huge-lava-tubes-could-exist-on-the-moon.html



Lee Skinner

  


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Re: [Texascavers] [SWR] It's bat vs. bat in aerial jamming wars

[Ken Harrington via Texascavers]

Interesting article and makes me wonder why bats have such good eyesight if it 
is not used to capture insects (food).  This article seems to show that bats 
which use echo-location for finding food use it exclusively and if it is jammed 
they do not get the food.  
What purpose do the eyes function as?  Seeing as bats spend most of their lives 
in low light level conditions, are their eyes working in a different spectrum 
or frequency range that that used in conditions of white light?  Do they have a 
spectrum of eyesight that allows navigating narrow spaces in total darkness?
 
Yeah, I know my mind works in strange ways but I have to question why something 
such as eyesight (which takes up a large part of the brain to process) is 
provided if it is not used for some type of survival technique such as finding 
food.
 
Ken 

Life isn't about waiting for the storm to pass - It's about dancing in the 
rain. 
 
Date: Tue, 30 Dec 2014 21:59:35 +
From: dirt...@comcast.net
To: s...@caver.net; Texascavers@texascavers.com; tag-...@hiddenworld.net
Subject: [SWR] It's bat vs. bat in aerial jamming wars

It's bat vs. bat in aerial jamming wars 
https://www.sciencenews.org/article/its-bat-vs-bat-aerial-jamming-wars?mode=magazinecontext=189468tgt=nr
 It's bat vs. bat in aerial jamming warsSpecial wavering call sabotages aimBy 
Susan Milius10:00am, December 19, 2014 SONAR WARS Of the 15 known kinds of 
squeaks and chirps that a Mexican free-tailed bat makes, one looks like aerial 
sabotage. Magazine issue: Vol. 186 No. 13, December 27, 2014 In nighttime 
flying duels, Mexican free-tailed bats make short, wavering sirenlike 
waaoo-waaoo sounds that jam each other’s sonar. These “amazing aerial battles” 
mark the first examples of echolocating animals routinely sabotaging the sonar 
signals of their own kind, says Aaron Corcoran of Wake Forest University in 
Winston-Salem, N.C. Many bats, like dolphins, several cave-dwelling birds and 
some other animals, locate prey and landscape features by pinging out sounds 
and listening for echoes. Some prey, such as tiger moths, detect an incoming 
attack and make frenzied noises that can jam bat echolocation, Corcoran and his 
colleagues showed in 2009 (SN: 1/31/09, p. 10). And hawkmoths under attack make 
squeaks with their genitals in what also may be defensive jamming (SN Online: 
7/3/13). But Corcoran didn’t expect bat-on-bat ultrasonic warfare. Mexican 
free-tailed bats fight sonar wars, jamming each other’s echolocation signals in 
competitions to snatch moths out of the night sky. Nickolay HristovHe was 
studying moths dodging bats in Arizona’s Chiricahua Mountains when his 
equipment picked up a feeding buzz high in the night sky. A free-tailed bat was 
sending faster and faster echolocation calls to refine the target position 
during the final second of an attack. (Bats, the only mammals known with 
superfast muscles, can emit more than 150 sounds a second.) Then another 
free-tailed bat gave a slip-sliding call. Corcoran, in a grad student frenzy of 
seeing his thesis topic as relevant to everything, thought the call would be a 
fine way to jam a buzz. “Then I totally told myself that’s impossible — that’s 
too good to be true.” Five years later he concluded he wasn’t just hearing 
things. He and William Conner, also of Wake Forest, report in the Nov. 7 
Science that the up-and-down call can cut capture success by about 70 percent. 
Using multiple microphones, he found that one bat jams another, swoops toward 
the moth and gets jammed itself. Corcoran says that neighborly sabotage could 
be especially valuable for the highly sociable Mexican free-taileds (Tadarida 
brasiliensis). “If you live in a cave with a million bats,” he says, “you have 
to go out and find food — and compete with a million bats.” JAMMED SIGNAL Three 
video clips filmed outdoors at night show Mexican free-tailed bats (the larger 
white shapes) hunting tethered insects (smaller white shapes). The first clip 
shows a successful midair catch, and the rest show how jamming calls foil the 
attempts. Credit: A.J. Corcoran et al./Science 2014.
DirtDoc

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