21) Message boards : News : No tasks (Message 4890)
Posted 16 Oct 2021 by Jim1348
Post:
This works for me.
https://boinc.berkeley.edu/forum_thread.php?id=14422&postid=105657#105657
22) Message boards : News : Network maintenance. (Message 4820)
Posted 2 Oct 2021 by Jim1348
Post:
Does anyone has a salutation?

It is a Windows problem. I don't know which solution works best, I am on Linux.
https://boinc.berkeley.edu/forum_thread.php?id=14413#105521
23) Message boards : Science : How does Universe@H's BHSpin application differ from the new project BlackHoles@H? (Message 4775)
Posted 21 Aug 2021 by Jim1348
Post:
The lead professor, Dr. Etienne, is associated with both universities according to his profile page on the site.
Interesting. It appears that as an "Associate Professor", his main affiliation is now Idaho.
The University of Idaho at Moscow is not that far from the Hanford LIGO Observatory. There may be a number of staff at both places.
24) Message boards : Number crunching : Does anyone have a way of getting faster BHspin v2 0.19 tasks? (Message 4765)
Posted 16 Jul 2021 by Jim1348
Post:
Something is amiss. I was running Universe on a Ryzen 2700 and getting around 45 minutes or so on Ubuntu 20.04.2.
You are probably running the GW work units on Einstein They take a lot of CPU support. Try reserving two cores for them.
With a fast card like an RTX-2070, it might even help to reserve three cores.
25) Message boards : Science : How does Universe@H's BHSpin application differ from the new project BlackHoles@H? (Message 4718)
Posted 1 Jun 2021 by Jim1348
Post:
Best I can tell is it's for developers.
Isn't it just for simulations? The BOINC version will be using real data.
26) Message boards : Science : How does Universe@H's BHSpin application differ from the new project BlackHoles@H? (Message 4716)
Posted 31 May 2021 by Jim1348
Post:
Has anyone installed this and run it yet?
TL;DR: Tremendous progress has been made, and BlackHoles@Home is on target for an August 2021 launch!
http://astro.phys.wvu.edu/bhathome/
27) Message boards : Science : How does Universe@H's BHSpin application differ from the new project BlackHoles@H? (Message 4711)
Posted 26 May 2021 by Jim1348
Post:
BlackHoles@Home analyses actual data from BH collisions, as detected from the LIGO detectors in the U.S., and presumably others around the world. It attempts to recover various parameters of the BH, such a spin, with higher precision than is now possible.

I believe Universe attempts to show how black holes form and evolve over time from interstellar gasses or whatever. So they are looking at quite different stages in the BH timeline. But that is about as far as I can take it.

(I have had a Ryzen 3600 running Ubuntu 20.04.2 with 48 GB of memory waiting for BH@Home for the past year.)
28) Message boards : Number crunching : How long will it take to complete the Universe@home project? (Message 4688)
Posted 16 Apr 2021 by Jim1348
Post:
Many thanks for staying with us!
Thank you for the explanation. It is a very good project during a pandemic actually.
Stay safe.
29) Message boards : Number crunching : How long will it take to complete the Universe@home project? (Message 4680)
Posted 7 Apr 2021 by Jim1348
Post:
But we have not heard much recently. What are we working on? A black-hole database?
Is there a particular problem they are looking at?

I think we are a bit lost in space.
30) Message boards : Number crunching : Double or Triple your task throughput on Windows! (Message 4652)
Posted 7 Mar 2021 by Jim1348
Post:
I may give this Hyper-v a try on this 1800x, though.
That is what I would do, if I needed another Linux machine. But I have several Ubuntu 20.04 machines now, so I need to keep one on Windows.
By the way, I just installed Ubuntu 20.04.2 onto a new Ryzen 3600 build with no particular problems. I loaded it in from a flash drive.
So they have fixed the issues with not detecting Nvidia cards. At least I had no problem with a GTX 750 Ti.

In fact, they have drivers for AMD cards, but they are only useful for desktop work. Their OpenCl drivers, which you need for crunching, don't work with Ubuntu 20.04.2, though they did with 20.04.1.
It is always two steps forward, one step back with Linux, unless it is the other way around.

Good luck.
31) Message boards : Number crunching : Upload of WUs failed (Message 4640)
Posted 24 Feb 2021 by Jim1348
Post:
I can't upload either.

EDIT: All but one have uploaded. I am sure the server is under heavy load, but returning to normal.
32) Message boards : Science : First black hole ever detected is more massive than we thought (Message 4635)
Posted 21 Feb 2021 by Jim1348
Post:
New observations of the first black hole ever detected have led astronomers to question what they know about the Universe's most mysterious objects. Published today in the journal Science, the research shows the system known as Cygnus X-1 contains the most massive stellar-mass black hole ever detected without the use of gravitational waves.
https://phys.org/news/2021-02-black-hole-massive-thought.html

====================================================================

With a mass originally estimated at 15 times that of the sun, Cygnus X-1 is one of the most massive and most luminous of the X-ray binary systems known in the Milky Way. New measurements have now raised that figure to 21 solar masses. The makeover does not change the overall perception of the cosmos; Cygnus X-1 is still a black hole, an almost science-fictional manifestation of Einsteinian weirdness in celestial reality. But the details of how Cygnus X-1 became a black hole are now in doubt.

“A significant change in the mass of such a classic and historical astronomical source is a big deal (at least to astronomers),” Daniel Holz, a theoretical astrophysicist at the University of Chicago who was not part of the study, wrote in an email. Also by email, James Miller-Jones of the International Center for Radio Astronomy Research at Curtin University in Australia wrote: “We realized that a 21-solar-mass black hole was too massive to form in the Milky Way with the best existing estimates of the amount of mass lost by massive stars in stellar winds.”
https://www.nytimes.com/2021/02/18/science/cygnus-black-hole-astronomy.html
33) Message boards : News : No tasks (Message 4626)
Posted 5 Feb 2021 by Jim1348
Post:
Have you checked your neighbours, Jim, to see if the courier left your black hole with them?

We are digging out of two feet of snow. I haven't gotten to the end of the driveway yet, but I will check tomorrow.
34) Message boards : News : No tasks (Message 4617)
Posted 30 Jan 2021 by Jim1348
Post:

1. Are there any perks of working here ?

They were supposed to give away a free black hole when you reached 100,000,000 credits, but I haven't seen mine yet.
35) Message boards : News : No tasks (Message 4528)
Posted 27 Nov 2020 by Jim1348
Post:
Is the Server Administration a one-man team?
Pretty much so.

Get well soon! Most of my machines are on Rosetta and other COVID projects.

Here is an interesting new one if you need a replacement:
https://fightcovid.boinc.ru/sidocktest/
It is still in the test phase, but I think they are doing real work units.
36) Message boards : Number crunching : No tasks available (Message 4521)
Posted 26 Nov 2020 by Jim1348
Post:
If they were in the U.S., they could just say it was due to Thanksgiving.
I don't think that works in Warsaw.

I did get two _2 re-sends, but will be very, very dry shortly.
37) Message boards : Science : At the Edge of Time, a Litter of Galactic Puppies (Message 4473)
Posted 1 Oct 2020 by Jim1348
Post:
Astronomers announced on Thursday that they had discovered a giant black hole surrounded by a litter of young protogalaxies that date to the early universe — the beginning of time.

The black hole, which powers a quasar known as SDSS J1030+0524, weighed in at a billion solar masses when the universe was only 900 million years old. It and its brood, the astronomers said, represented the infant core of what became a vast cluster of galaxies millions of light years across and encompassing a trillion suns worth of matter.

The discovery should help astronomers understand the origins of galactic clusters— the largest structures in the universe — and how supermassive black holes could have grown so quickly in the early universe. And it provides a rare glimpse of the cosmic web, a network of filaments spanning the cosmos that determine the large-scale distribution of matter in the universe.

https://www.nytimes.com/2020/10/01/science/astronomy-galaxies-black-hole.html
38) Message boards : Science : Is There a Black Hole in Our Backyard? (Message 4470)
Posted 11 Sep 2020 by Jim1348
Post:
But you don’t need a star to die to make a black hole. In 1971, Stephen Hawking, drawing on an idea earlier suggested in 1966 by the Russian physicists Yakov Borisovich Zel’dovich and Igor Dmitriyevich Novikov, theorized that intense pressures during the Big Bang could have collapsed matter directly into black holes. Those primordial black holes could be of any size and could be anywhere. A black hole as massive as Earth would be about the size of a Ping-Pong ball and would be exceptionally hard to see.

No such primordial black holes have been detected yet. But neither has their existence been ruled out. Dr. Scholtz and Dr. Unwin pointed out that an experiment called OGLE, for Optical Gravitational Lensing Experiment, based at the University of Warsaw in Poland, had detected the presence of a half-dozen dark objects in the direction of the center of our Milky Way galaxy. Their gravitational fields had acted as lenses, briefly amplifying the light from distant stars that they drifted in front of.

Those objects could be free-floating planets, the authors said, with masses ranging from half to about 20 times that of Earth. But they could as easily be primordial black holes floating around the galaxy, the astronomers proposed. If that were the case, the putative Planet Nine could well be a black hole, too, in a distant orbit around the sun.
https://www.nytimes.com/2020/09/11/science/astronomy-planet-nine-black-hole.html

I wonder how this ties in with the Universe work?
39) Message boards : Number crunching : Double your task throughput on Linux (Message 4459)
Posted 3 Sep 2020 by Jim1348
Post:
It seems the start of each series takes the shortest amount of time to calculate in general.

Yes, I got a couple at 36 minutes, but they don't last long.

I have no idea about what libraries are improved. This upgrade does not speed up WCG (OPN or MIP), so they must not use them.
I have a lot of other projects to check out though.
40) Message boards : Number crunching : Double your task throughput on Linux (Message 4457)
Posted 2 Sep 2020 by Jim1348
Post:
I am now averaging about 51 minutes for the BHspin v2. They range from 42 minutes to a little over an hour.
Just for comparison, I ran one on my Win7 machine, an i7-4771 with about the same speed as the Ryzen 2700.
It took 3 hours 20 minutes.

I think I will stick to Linux.

PS - The ULX are also speeding up by about the same amount, but I don't have an average yet.


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