[SETI@Home] hitparade van 13 mei

[APClll]

Vandaag valt er niet zoveel in de stats te ontdekken. Geen nieuwe leden, geen mijlpalen.

Om het dan toch maar wat interressant te houden, gaan we eens wat dieper in over het Astrupulse gebeuren.
Wat is Astropulse?

Astropulse is a new type of SETI. It expands on the original SETI@home, but does not replace it. The original SETI@home is narrowband, meaning that it is listening for a particular radio frequency. That's like listening to an orchestra playing, and trying to hear when anyone plays the note "A sharp". Astropulse listens for short-time pulses. In the orchestra analogy, it's like listening for a quick drum beat, or a series of drumbeats. Since no one knows what extraterrestrial communications will "sound like," it seems like a good idea to search for several types of signals. In scientific terms, Astropulse is a sky survey that searches for microsecond transient radio pulses. These pulses could come from ET, or from some other source. I'll define each of those terms:

• Sky survey: The telescope we use (Arecibo Observatory) scans across the sky, searching for signals everywhere. This differs from a directed SETI search, in which the telescope examines a few stars carefully.
• Microsecond: A millionth of a second. Astropulse is better than previous searches at detecting signals that last for a very short length of time. The shorter the signal, the better Astropulse is at detecting it, to a lower limit of 0.4 microseconds. Astropulse can detect signals shorter than 0.4 microseconds, it just stops getting better and better in comparison to other searches.
• Transient: A signal is transient if it is short, like a drumbeat. A transient signal can be repeating (it beats over and over again) or single pulse (it beats only once.)
• Radio: The signals are made of the same type of electromagnetic radiation that an AM or FM radio detects. (Actually of substantially higher frequency than that, but still considered "radio.") Electromagnetic radiation includes radio waves, microwaves, infrared light, visible light, ultraviolet light, x-rays, and gamma rays. Click here for more information on electromagnetic radiation.

Here's a picture of a transient radio pulse:

In this plot, the x-axis is time, and the y-axis is frequency. This plot shows that the frequency of the pulse decreased over time, which is exactly what we would expect from a dispersed pulse. See the dispersed pulses section for more.

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De volgende keer gaan we dieper in op de bronnen van deze signalen. Voor het uitgebreide verhaal is deze startpost wat aan de kleine kant
Wil je nu al het hele verhaal lezen? klik dan hier

quote: http://setiathome.berkeley.edu/tech_news.php

13 May 2009 19:24:37 UTC
No real server news today, but I'll respond to a couple things mentioned in the previous thread.

I said we have about 150 CPUs in our server fold. Of course, looking at the list of machines on the server status page you see about 40. First, this isn't a complete list - it only contains public facing or critical servers. We have a lot of other systems that are doing tangential tasks or behind-the-scenes stuff. We also have several appliances (like the NAS's) which contain multiple CPUs as well. Still, this number may be inflated a bit due to hyperthreading on some servers. I think the actual number of physical CPUs is still above 100 though. Plus, as I was calculating this just now I found that two of the CPUs on sidious have apparently died. This is no surprise - it's a used/experimental machine and had CPU issues since day one, which is why it is the replica mysql server and not the master.

The talk (which happens next week) should be viewable over the net after it happens. I don't think we're going to do live streaming or anything like that. We're going to meet and discuss early next week what our options are.

- Matt

DPC SETI@Home hitparade van 13 mei 2009

Daily Top 30
Flushers: 71 / 995 (7,1 %)
pos		daily	member	total
1.	()	18.376	Searchy! Internet Services V.O.F.	9.523.083	(4)
2.	(3)	14.877	[DPC]TeamGrazzie	12.771.786	(2)
3.	(1)	12.928	Sp@ceNv@der	11.940.690	(3)
4.	(1)	9.279	[DPC] hansR	15.311.400	(1)
5.	(1)	7.624	[DPC] Switch	9.339.759	(5)
6.	(1)	6.837	dpc_kluizenaar	675.790	(29)
7.	(2)	6.781	o25o & Dharkon	4.936.312	(6)
8.	(2)	4.976	dr bommel	621.032	(33)
9.	(2)	3.709	Ensign Wildfire	3.426.539	(7)
10.	(2)	3.643	Jan Zandvliet & x-RaY99	1.825.564	(13)
11.	(1)	2.815	F@stmem	2.427.870	(9)
12.	(1)	2.777	[DPC]NGS	43.325	(218)
13.	(30)	2.139	Intrud3r	107.138	(124)
14.	(11)	1.630	seridan	497.643	(39)
15.	(2)	1.555	Wolfje666	69.399	(161)
16.	(25)	1.524	Doelloos	54.889	(184)
17.	(13)	1.436	K3th3r	191.516	(88)
18.	(29)	1.307	Teun Leijten	177.942	(94)
19.	(1)	1.284	[DPC] Brainy007	647.746	(31)
20.	(2)	1.268	[DPC]Trancemaus	2.357.384	(10)
21.	(13)	1.261	ray	1.381.047	(16)
22.	(14)	1.261	trout	292.206	(65)
23.	(9)	1.246	AmeComputers	1.889.673	(12)
24.	(9)	1.245	darude1234	182.921	(92)
25.	(1)	1.243	Sylvester	332.727	(60)
26.	(11)	1.221	Jox444	942.224	(24)
27.	(27)	1.191	muppet99	211.420	(82)
28.	(16)	970	ERBrouwer	121.110	(116)
29.	(8)	950	Mr Beamer	1.943.343	(11)
30.	(2)	750	Override	979.713	(23)
	More...

Overall Top 30
pos		total	member	daily
1.	()	15.311.400	[DPC] hansR	9.279	(4)
2.	()	12.771.786	[DPC]TeamGrazzie	14.877	(2)
3.	()	11.940.690	Sp@ceNv@der	12.928	(3)
4.	()	9.523.083	Searchy! Internet Services V.O.F.	18.376	(1)
5.	()	9.339.759	[DPC] Switch	7.624	(5)
6.	()	4.936.312	o25o & Dharkon	6.781	(7)
7.	()	3.426.539	Ensign Wildfire	3.709	(9)
8.	()	2.586.249	[DPC]Spinpoint	0	(-)
9.	()	2.427.870	F@stmem	2.815	(11)
10.	()	2.357.384	[DPC]Trancemaus	1.268	(20)
11.	()	1.943.343	Mr Beamer	950	(29)
12.	()	1.889.673	AmeComputers	1.246	(23)
13.	()	1.825.564	Jan Zandvliet & x-RaY99	3.643	(10)
14.	()	1.502.870	MAX3400	0	(-)
15.	()	1.501.520	[DPC]Team Zuid-Holland	369	(39)
16.	()	1.381.047	ray	1.261	(21)
17.	()	1.376.565	Tijntje	162	(48)
18.	()	1.135.675	Speedy67 & Friends	0	(-)
19.	()	1.121.440	visvogel	0	(-)
20.	()	1.069.176	[DPC] Anticimex & Lock Metaaldetectie	0	(-)
21.	()	1.060.791	Berkie	0	(-)
22.	()	1.049.597	[DPC]SjoQing	0	(-)
23.	()	979.713	Override	750	(30)
24.	()	942.224	Jox444	1.221	(26)
25.	()	940.280	Dadoke	377	(38)
26.	()	875.498	Quark	130	(49)
27.	()	822.711	Rydo	0	(-)
28.	()	757.012	MaGNeT aka BlueTooth76	682	(33)
29.	(1)	675.790	dpc_kluizenaar	6.837	(6)
30.	(1)	673.789	Psyed	0	(-)
	More...

Teams Daily Top 15
pos		daily	team	total
1.	()	636.867	SETI.USA	1.048.543.889	(1)
17.	(1)	173.952	Phoenix Rising	163.262.707	(20)
18.	()	150.151	BroadbandReports.com Team Starfire	326.671.428	(8)
19.	(2)	142.995	BOINC@AUSTRALIA	147.127.547	(26)
20.	()	130.812	Nordlichter	34.681.798	(105)
21.	()	110.717	Elite Games	108.820.288	(35)
22.	(2)	109.940	OcUK - Overclockers UK	209.344.753	(15)
23.	(1)	107.869	The Planetary Society	216.107.809	(14)
24.	(4)	105.266	Dutch Power Cows	136.287.599	(27)
25.	(1)	103.620	BOINC@Poland	130.397.661	(30)
26.	(3)	99.366	Canada	157.230.687	(21)
27.	(16)	97.546	BOINC.Italy	151.486.435	(23)
28.	(6)	95.958	Universe Examiners	134.001.724	(29)
29.	()	94.058	U.S.Air Force	150.241.657	(25)
30.	(3)	86.490	Boone Community School District - Iowa	97.037.798	(39)
31.	(7)	83.356	Team Norway	64.461.073	(53)
	More...

Teams Overall Top 15
pos		total	team	daily
1.	()	1.048.543.889	SETI.USA	636.867	(1)
20.	()	163.262.707	Phoenix Rising	173.952	(17)
21.	()	157.230.687	Canada	99.366	(26)
22.	()	152.575.693	Ars Technica	81.514	(34)
23.	()	151.486.435	BOINC.Italy	97.546	(27)
24.	()	150.577.460	Amateur Radio Operators	73.631	(39)
25.	()	150.241.657	U.S.Air Force	94.058	(29)
26.	()	147.127.547	BOINC@AUSTRALIA	142.995	(19)
27.	()	136.287.599	Dutch Power Cows	105.266	(24)
28.	()	134.822.810	UK BOINC Team	65.945	(43)
29.	()	134.001.724	Universe Examiners	95.958	(28)
30.	()	130.397.661	BOINC@Poland	103.620	(25)
31.	()	126.725.729	AUSTRIA - NATIONAL - TEAM	62.120	(45)
32.	()	121.681.774	BOINC SETI@home RUSSIA	67.197	(42)
33.	()	119.556.914	PC Perspective Killer Frogs	69.997	(40)
34.	()	118.005.349	Team NIPPON	82.403	(32)
	More...

Megaflush Top 5
pos	Team	Flush	Date
1.	[DPC]TeamGrazzie	553.056	04-01-2008
2.	chelloo.com	261.227	09-01-2008
3.	[DPC]Spinpoint	174.423	14-06-2007
4.	hansR	170.409	17-08-2008
5.	REISinformatiegroep	165.307	18-04-2007
More...

When do you get them

Team	Average	Days
Amateur Radio Operators	142.588	794
BOINC.Italy	150.808	1.555
Ars Technica	152.663	2.057
Team MacNN	127.074	2.167
Team Art Bell	149.733	6.505

SETI@Home Links
SETI@Home webpage
SETI@Home forum
DPCH Suggestiepagina
Bron

[ Voor 100% gewijzigd door APClll op 14-05-2009 11:28 ]

[Black Piet]

Dank voor de stats Altijd even interessant om even te lezen wat we nu werkelijk aan het crunchen zijn....

Echter een belangrijk nadeel is dat de AP WU's ook 12 uur kunnen duren. Daarom komen ze bij mij er niet in.

[APClll]

Black Piet schreef op donderdag 14 mei 2009 @ 16:42:
Dank voor de stats Altijd even interessant om even te lezen wat we nu werkelijk aan het crunchen zijn....

Echter een belangrijk nadeel is dat de AP WU's ook 12 uur kunnen duren. Daarom komen ze bij mij er niet in.

Bij mij ook niet

Hoewel, na die maand WCG erger ik me al een stuk minder aan langdurende WU's

[grass460]

tja MB wu vliegen er wel doorheen ja
indd wat APCIII zegt