mersenneforum.org  

Go Back   mersenneforum.org > Extra Stuff > Science & Technology

Reply
 
Thread Tools
Old 2020-11-21, 02:54   #12
axn
 
axn's Avatar
 
Jun 2003

12F816 Posts
Default

Quote:
Originally Posted by a1call View Post
computer modeling and simulations <snip> exact-Science
Way to contradict yourself in a single sentence!
axn is offline   Reply With Quote
Old 2020-11-21, 15:53   #13
a1call
 
a1call's Avatar
 
"Rashid Naimi"
Oct 2015
Remote to Here/There

26·31 Posts
Default

Quote:
Originally Posted by Dr Sardonicus View Post
Reading about the demise of Arecibo is quite depressing, and makes me feel my age, because I remember when it started. I particularly recall a little oopsadaisy in the newspaper announcement, saying that the new telescope would be able to see 347 miles into space.
And I remember reading this (at the time) which some may get a kick out of:

Arecibo message
a1call is offline   Reply With Quote
Old 2020-11-22, 14:10   #14
kriesel
 
kriesel's Avatar
 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest

3·1,637 Posts
Default

Quote:
Originally Posted by a1call View Post
And I remember reading this (at the time) which some may get a kick out of:

Arecibo message
That "call-back" was way earlier than reasonable to expect, unless assuming a nearby listening post.
kriesel is offline   Reply With Quote
Old 2020-11-22, 15:00   #15
moebius
 
moebius's Avatar
 
Jul 2009
Germany

547 Posts
Default

Quote:
Originally Posted by a1call View Post
And I remember reading this (at the time) which some may get a kick out of:Arecibo message
and the answer from outer space is ....
This time with the original DNA of the aliens not the hoax DNA from UK
Attached Thumbnails
Click image for larger version

Name:	Arecibo_receiver.jpg
Views:	95
Size:	10.7 KB
ID:	23830  

Last fiddled with by moebius on 2020-11-22 at 15:14
moebius is offline   Reply With Quote
Old 2020-11-22, 16:42   #16
moebius
 
moebius's Avatar
 
Jul 2009
Germany

547 Posts
Default

Quote:
Originally Posted by moebius View Post
and the answer from outer space is ....
This time with the original DNA of the aliens not the hoax DNA from UK
and finally a new reply
Attached Thumbnails
Click image for larger version

Name:	BY7.jpg.png
Views:	87
Size:	1.6 KB
ID:	23831  
moebius is offline   Reply With Quote
Old 2020-11-23, 04:57   #17
rudy235
 
rudy235's Avatar
 
Jun 2015
Vallejo, CA/.

7×139 Posts
Default

How many of this forum have actually visited the Arecibo Radio Telescope?
I was there in November 2013.
rudy235 is offline   Reply With Quote
Old 2020-11-23, 08:42   #18
moebius
 
moebius's Avatar
 
Jul 2009
Germany

547 Posts
Default

Quote:
Originally Posted by rudy235 View Post
How many of this forum have actually visited the Arecibo Radio Telescope? I was there in November 2013.
Never , but in 1999 I analyzed some data recorded by the radio Telescope.
moebius is offline   Reply With Quote
Old 2020-11-23, 15:53   #19
storm5510
Random Account
 
storm5510's Avatar
 
"Norman D. Powell"
Aug 2009
Indiana, USA.

35248 Posts
Default

Looking at the attached image, I do not understand why it cannot be retrofitted. Nothing needs to be done to the dish. It seems there is a lot more weight around the receiving element than needs to be. The pylons appear to be concrete. As for the cables, there is such a thing as stainless steel. Redesign the receiver and replace the cables...
Attached Thumbnails
Click image for larger version

Name:	aricebo.JPG
Views:	57
Size:	92.2 KB
ID:	23836  
storm5510 is offline   Reply With Quote
Old 2020-11-23, 19:06   #20
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

935610 Posts
Default

Quote:
Originally Posted by storm5510 View Post
Redesign the receiver and replace the cables...
The thing suspended in the centre weighs ~900 tons. There is concern based upon examination of the cables that remain, that one or more could give way suddenly. 2 of the 3 firms asked to examine it say that there is not a safe way forward to stabilize it and continue using it. They are recommending explosively severing all of the lines at once. Dropping all of that into the dish will cause much damage to the dish.
Uncwilly is online now   Reply With Quote
Old 2020-11-23, 21:09   #21
rudy235
 
rudy235's Avatar
 
Jun 2015
Vallejo, CA/.

17158 Posts
Default

Quote:
Originally Posted by Uncwilly View Post
The thing suspended in the centre weighs ~900 tons. There is concern based upon examination of the cables that remain, that one or more could give way suddenly. 2 of the 3 firms asked to examine it say that there is not a safe way forward to stabilize it and continue using it. They are recommending explosively severing all of the lines at once. Dropping all of that into the dish will cause much damage to the dish.
I do not see a way this could be repaired. They dropped the ball (no pun intended) when on August 10 the first cable snapped.

I hate to engage in political opinion but the current administration was very dismissive of Puerto Rico on the occasion of Hurricane Maria in 2017.

The Radio Telescope was already neglected by the stateside authorities and then an auxiliary cable broke in August and tore a 100-foot hole in the reflector dish and damaged the dome above it.
That was the time (if science were a priority of the administration) to engage in emergency repairs. Now it is too late.

Last fiddled with by rudy235 on 2020-11-23 at 21:13
rudy235 is offline   Reply With Quote
Old 2020-11-23, 21:14   #22
Uncwilly
6809 > 6502
 
Uncwilly's Avatar
 
"""""""""""""""""""
Aug 2003
101×103 Posts

222148 Posts
Default

Uncwilly is online now   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Manual rebuild of worktodo.txt Unregistered Information & Answers 2 2010-07-08 22:11
Can hashes like MD5 be used to rebuild data? E_tron Math 6 2005-09-25 01:38

All times are UTC. The time now is 15:07.

Tue Mar 2 15:07:39 UTC 2021 up 89 days, 11:18, 0 users, load averages: 1.82, 1.74, 1.78

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.