Random Picture Thread

Really?

I was just trying to make a little joke.
Obviously not very good.

 

Yes, I agree Jolly and Hoyt. There is no hard and fast rule to the use of Sonar and Radar. As Jolly said, echo location is a better term.

There is a blind human, a savant, that uses echo location by clicking his tongue for echo location. That is relatively low frequency.

Bats uses a higher frequency chirping sounds but its uncanny ability to dodge obstacles seems to indicate to scientist that it is listening to harmonics, beyond what can be heard. Basically still a sonar but at a much higher frequency. I am intrigued if there is a new study made. The latest is that Brazilian bats have been clocked to be the fastest flying "animals" as the article said.

 

The quote that says ‘‘Radar’’ is taken from the text below the linked video.

In the video itself however they say ‘‘echolocation’’ as Jolly and Rx say, and nowhere in the spoken video text it says ‘‘Radar’’.

Far as I know Radar is echolocation by using electromagnetic waves, and Sonar is echolocation by using sound.

I believe bats use high frequency sound for echolocation rather than electromagnetic waves.

So for bats I'll think echolocation would be a right term, and Sonar would be a more specific right term.

Indeed marine mammals use sonar too, but because of the different medium in which the sound travels the used frequency is different, marine mammals use a lower frequency I believe.

 

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Thanks Rx , I've looked up the guy...

Human echolocation - Daniel Kish, "Batman"​

Daniel Kish: How I use sonar to navigate the world​

Teaching the blind to navigate the world using tongue clicks: Daniel Kish at TEDxGateway 2012​

 

Thanks Angelique. I had in mind Ben Underwood and it turned out there are more who uses echolocation. He was originally listed as a savant but no longer there. I guess he is "normal" and does not belong to that category.

https://en.wikipedia.org/wiki/Human_echolocation

http://www.benunderwood.com/aboutme.html

 

Bats hunt moths by echolocation and the moths know it. they have developed countermeasures.

http://sciencehubb.co.uk/eavesdropping-moths-predict-bats-next-move-deploy-countermeasures/

 

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Thanks Rx for the info and links - Thanks to Hoyt too, very interesting

Basically by "savant" you didn't say anything wrong Rx,

The English word "savant" comes from the French word "savant" which is a form of the verb "savoir", which means "to know", and comes from the Latin word "sapere" which means "to be wise" - "taste" - "have good taste", and so "savant" is a good thing.

The old term "idiot savant" however is something else, as it means "silly scholar", and is now mostly abandoned because of its unpleasant connotation, and as such nowadays often is substituted by the term "savant syndroom".

There is however mixed use of the term "savant", see meaning #2 in the below "savant" quote, and the last part of meaning #1 in the "idiot savant" quote.

---> savant

---> idiot savant

 

Very nice collection of photos from here...

http://forum.woodenboat.com/showthread.php?215745-Images-from-Lost-England

 

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06 October 2016: Superyacht Ebony Shine completes refit in Holland

07:58 - 2 dec. 2016: Picture ^{Dutch link} of the yacht being seized and brought up by tugs escorted by Dutch Police boats to a Dutch Naval Base in Den Helder in the Netherlands.

05 Dec. 2016: Superyacht of corrupt presidents son chained up in Den Helder in the Netherlands ^{Dutch link} - - (scroll down to see some of his other toys)

December 8, 2016: 76m Ebony Shine seized by Dutch authorities

 

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Dutch merchant shipping blog ^{Dutch link}

The front tug AEGIR ^{Dutch link}

The aft tug CATHARINA 4 ^{Dutch link}

The front Dutch Police boat P87 ^{Dutch link}

The aft Dutch Police boat P97 ^{Dutch link}

 

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Teodoro Nguema Obiang Mangue - - Quote from Wikipedia: December 10, 2016

According to the next linked articles eleven Supercars from the fleet of Teodorín Obiang are currently seized in Switzerland, and also his second and much larger Superyacht Ice seems to be moving out of Europe, maybe on the run home and heading south for Equatorial Guinea to prevent she's seized too . . . ? ?

December 05, 2016: Confiscation of Superyacht African rich kid appears to be a part of an anti-corruption campaign ^{Dutch link}

---> Twitter 3 nov. 2016

November 3, 2016: Justice seizes the Cars of Teodorín Obiang on the tarmac of Cointrin ^{French link} - - (Cointrin = Geneva Airport)

November 10, 2016: Teodorín Obiang: after the Cars, here are the Yachts ^{French link}

The last above linked article (Nov. 10, 2016) says Teodorín Obiang's Yacht Ice is moored in Gibraltar, but according to some ship info and tracking services ^{Link* > Link | Link > Link} she's now moored on the other side of the Strait of Gibraltar in Tangier Morocco at 35°47'10.7"N 5°48'05.3"W ^{shows now a cat for me} on December 10, 2016 at 00:17 Zulu time (= UTC).

Quote from the above marked Link*

Ice Yacht

 

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Here's a trifle from a few years ago of the same protagonist...

Mon. 6 February 2012: France impounds African autocrats' 'ill-gotten gains'

Mon. Juli 8, 2013: Cars seized from Equatorial Guinea president's son reap 2.8 million euros

Here's video of the September 2011 seize . . .​

Maserati MC12 + Aston Martin V8 V600 LM + Carrera GT seized by the police !!​

Hear the engine sound and revs up from 53 sec, sure no wheel spin, but a lot of smoke coming from under the bottom at the mid-engine area up from 56 sec, and there's also a smoke plume from the air intake on top of the car from 57 sec to 1:05, looks like they're burning up the clutch of the Maserati MC12 there . .

Doesn't seem easy to handle 652 Nm (481 lbf·ft) torque at 5,500 rpm with 1,497 kg (3,300 lb) curb weight going up a car hauler with such a low car, maybe next time they're using a winch . . :idea:

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Anyway, here's a video about the main issue . . . ​

African leaders steal their own nations & owning vast French properties​

P.S.

US Department of Justice, also a trifle from a few years ago...

Friday, October 10, 2014: Second Vice President of Equatorial Guinea Agrees to Relinquish More Than $30 Million of Assets Purchased with Corruption Proceeds

Friday, October 10, 2014: Obiang Settlement Agreement PDF

 

Osiris & Riff Rat ---> Video - ​

Dutch Shepherd​

 

https://ecrivainparisien.wordpress.com/2012/06/24/les-gueules-noires/



http://www.gonautical.com/blog/sailing-ships-2/



https://opentextbc.ca/postconfederation/chapter/3-4-urbanization-and-industry/