Posts by Cheng Fan Soon


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1) Questions and Answers : Unix/Linux : No new task? (Solaris 11.1) (Message 1457192)
Posted 217 days ago by Profile Cheng Fan Soon
Installed SETI@home 6.03 (from www.dotsch.de) on my Solaris 3 days ago,
but until now still no work unit downloaded.
2) Message boards : Science (non-SETI) : Anunnaki (Message 1442262)
Posted 258 days ago by Profile Cheng Fan Soon
Carl Sagan's "Cosmos":
"With a continuous 1 g acceleration, after one year in space we would be traveling very close to the speed of light [(0.01 km/sec2) x (3 x 107 sec) = 3 x 105 km/sec]."

Correction to the calculation above, should be
[(0.01 km/sec^2) x (3 x 10^7 sec) = 3 x 10^5 km/sec]

3 x 10^7 sec is 30,000,000 sec (1 year = 31,536,000 sec )
3 x 10^5 km/sec is 300,000 km/sec (light speed = 299,792 km/sec)
3) Message boards : Science (non-SETI) : Anunnaki (Message 1439873)
Posted 264 days ago by Profile Cheng Fan Soon
Is interstellar space travel possible?
Well, after reading Carl Sagan's "Cosmos", I believe it is possible.

Carl Sagan's "Cosmos":
"If we lived in an interstellar spacecraft that could accelerate at 1 g, we would find ourselves in a perfectly natural environment. In fact, the equivalence between gravitational forces and the forces we would feel in an accelerating spaceship is a major feature of Einstein’s later general theory of relativity. With a continuous 1 g acceleration, after one year in space we would be traveling very close to the speed of light [(0.01 km/sec2) x (3 x 107 sec) = 3 x 105 km/sec]."

But, where can you get the energy to push a spaceship at 1 g acceleration for one whole year? The answer is, nuclear energy, whether it is deuterium+tritium or uranium.
Human's modern science and technology started only about few hundreds years.
If there are alien species out there who are science and technologically thousands or even millions of years more advance than us, they might already have the technology to built rocket engines that powered by nuclear energy.

For a space ship that travel near light speed (80%-90% maybe), interstellar space travel from nearby star system takes about 10 to 50 years(planet time), but on space ship time it is only about a few months.
http://en.wikipedia.org/wiki/Time_dilation
4) Message boards : Science (non-SETI) : 55 years of NASA (Message 1398649)
Posted 359 days ago by Profile Cheng Fan Soon
So far NASA had spent nearly US$200 billion on space shuttle programme.

Just wondering, isn't it more useful if the money is spend on new renewable energy research. Example more funding for ITER project? More funding means higher chance of success? And Shorter term to achieve the success?

The first duetrium-tritium reactor might be too expensive for producing electricity, but as more research is carry out, later improved design reactor might one day become economically viable for large scale electricity generation.

Just like the first computer was very expensive but as the technology improve, the cost of computers have decreased tremendously.

http://www.space.com/11358-nasa-space-shuttle-program-cost-30-years.html
5) Questions and Answers : Macintosh : Hackintosh - Install Mac osx to a windows desktop and run seti@home (Message 1377427)
Posted 418 days ago by Profile Cheng Fan Soon
Yesterday, my Hackintosh unable to bootup.
re-install Mac osx...and so i lost 100 work units !
6) Questions and Answers : Macintosh : Hackintosh - Install Mac osx to a windows desktop and run seti@home (Message 1354882)
Posted 477 days ago by Profile Cheng Fan Soon
Thanks, the system is now running 4 CPUs in full speed.
7) Questions and Answers : Macintosh : Hackintosh - Install Mac osx to a windows desktop and run seti@home (Message 1353207)
Posted 482 days ago by Profile Cheng Fan Soon
The desktop i am using is constructed from Intel mainboard DH67CL and the CPU is Intel I5.
Installing Mac osx (10.8.2) is quite straight forward by following instruction in
http://www.tonymacx86.com/61-unibeast-install-os-x-mountain-lion-any-supported-intel-based-pc.html

But for network, i use product from Edimax because their product come with driver for Mac.

This desktop is now running seti@home but it utilise only one CPU although the 'Activity Monitor' showing there are 4 CPUs in the system.
8) Message boards : Science (non-SETI) : Clean energy from Deuterium Tritium (Message 1264003)
Posted 736 days ago by Profile Cheng Fan Soon
Will a simple device like this works?

9) Message boards : Science (non-SETI) : New Virus threat (Message 1191518)
Posted 906 days ago by Profile Cheng Fan Soon
Am i right of saying this:

"When my pc infected with malicious software (sent by the hacker),
and the hacker take over my pc (or my pc got hijacked by the hacker).
It is like the hacker sitting infront of my pc.
He can do what ever he like...download/upload any files/pictures he like.

But the person who face the consequences is me because it is my pc and the internet account is under my name. The hacker is totally hidden, i don't know who the hacker is, and the ISP also unable to trace who the hacker is?

10) Message boards : Science (non-SETI) : Some thoughts about the possible fate of the universe. (Message 1187576)
Posted 919 days ago by Profile Cheng Fan Soon
Scientific America Oct 2008: Forget the Big Bang now it's the Big Bounce
11) Message boards : Science (non-SETI) : Travel speed of distant galaxies compare with nearby galaxies. (Message 1183018)
Posted 936 days ago by Profile Cheng Fan Soon
When astronomer observe that quasars happen only in very distant galaxies, they made a conclusion:
"Because of the great distances to the furthest quasars and the finite velocity of light, we see them and their surrounding space as they existed in the very early universe."

And now the astronomer's observation is that 'high speed galaxies' happen in very distant galaxies.
Can't they make the same conclusion on the 'high speed galaxies'?
12) Message boards : Science (non-SETI) : Travel speed of distant galaxies compare with nearby galaxies. (Message 1182775)
Posted 937 days ago by Profile Cheng Fan Soon
From what I know, distant galaxies travel with higher speed compare with nearby galaxies.
Distant galaxies also younger compare with nearby galaxies.
Our universe is about 13.75 billion year olds.
When we see galaxies which are 13 billion light year away from us through telescope,
the galaxies we see are actually only 750millions year olds.
and they travel at higher speed compare with (example) a nearby galaxy Andromeda, and Andromeda is about 13.5 billion year olds.
Isn't this show that as galaxies getting older, it's travel speed will also gradually decrease?
13) Message boards : Science (non-SETI) : The effects of time dilation on interstellar travel. (Message 1180580)
Posted 948 days ago by Profile Cheng Fan Soon
My thought is: "Time dilation is actually good for interstellar travel"
Say we have a space ship that travel at 50% of light speed.
To travel to nearest star Alpha Centauri which is about 4.3 light years away.
This space ship will take 8.6 years (earth time) to reach Alpha Centauri.
But on the space ship because time slow down, the people on the space ship might only get older one year.

My view is, it is possible to push space ship to say 50% light speed if we find a way to harness the energy from fusion power with "fusion engine"

Some advance alien species out there might already master the skill of harness energy from fusion power.

Some people say that a space ship moving at near light speed, an asteroid size of a 1cm diameter colliding with the space ship will cause total destruction of the space ship. My view is: "the chance an asteroid colliding with the space ship is very low...almost 0"

From where I got this idea? well....Discovery channel and History Channel's space programme, en.wikipedia.com, some text book about space.

There are 51 star systems that are within 16 light years radius from Earth.
With a space ship travel at 50% light speed, travel to these star systems and back to Earth is still within a reasonable time frame.

Alpha Centauri, 4.3 light years from Earth
Barnard's Star, 5.96 light years
Wolf, 7.8 light years
Lalande, 8.3 light years
Sirius, 8.6 light years
Luyten, 8.7 light years

more near by stars:
http://en.wikipedia.org/wiki/List_of_nearest_stars
14) Questions and Answers : Windows : How to increase the anti-vrus anti-malware power of your windows pc (Message 1179204)
Posted 954 days ago by Profile Cheng Fan Soon
Just wondering how you guys handle the internet security issues (How to protect your computer from unwanted viruses, worm, Trojan, malicious-ware).
No one want his/her computer being hijacked and become one member of the botnet unless it is for experiment/investigation.

I know there are website talking about this topic, but a big question in my mind is:
"Will a good Internet Security Suite able to give me 100% protection?
That means after I install the Security Suite into my Windows, I can be sure that my Windows PC will never be hijack by the hacker to become a botnet machine? (assume i don't simply click those link that come into my email mailbox)"

Although a firewall can provide some protection, but most of us home user will just use a basic firewall that come with the router - with default setting.
Will an enterprise class firewall able to give me higher degree of protection? (assume i just use the default setting of the firewall....not everyone of us know how to configure a firewall)

Often read in some website about "Why Windows so prone to virus attacks"
http://wiki.answers.com/Q/Why_windows_so_prone_to_virus_attacks

Although this question has nothing to do with running Seti@home.
But because of the worrying of the viruses/malicious-ware/botnet infection, I don't connect my Windows laptop to internet and thus unable to run Seti@home.
While for the other 6 PCs that installed with Solaris and Fedora, I have no worry to connect them to internet and run Seti@home.
15) Message boards : Science (non-SETI) : 600 light Years Away (Message 1176279)
Posted 965 days ago by Profile Cheng Fan Soon

Voyager travels at this moment at the speed of 18 m per second so just make the calculations.


18m per second? That is 64.8km per hour = speed of a car?

wikipedia said it is 17km per second.
http://en.wikipedia.org/wiki/Voyager_1
16) Questions and Answers : Unix/Linux : Wanted to try install Solaris 10 on Pentium 4 machine (Message 1174708)
Posted 972 days ago by Profile Cheng Fan Soon
Two of my Computers are Intel I5 actually, but the Boinc report it as Amd64.
No problem at all to install Solaris 11 (with gnome GUI) onto the I5 machine.
17) Questions and Answers : Unix/Linux : While Seti download server down. Can my Solaris 11 run other project? (Message 1174705)
Posted 972 days ago by Profile Cheng Fan Soon
While Seti download server is offline for another two days.

Just wondering how to run other projects on Solaris
Milkyway@home? Einstein@home? Rosetta@home? any other projects?
Thanks.

18) Message boards : Number crunching : Hard Drive replacement (Message 1173795)
Posted 977 days ago by Profile Cheng Fan Soon
Just wondering, can we install Boinc seti@home (command line version) into a USB thumbdrive.
Next time when we want to re-install OS, we just need to safely remove that thumbdrive.
After re-install OS, re-plugin the thumbdrive and run Boinc-seti immediately.

We can even plug that thumbdrive to any computer (with same OS) and run Boinc-seti on any computer.
19) Message boards : Number crunching : How to calculate PSU load right? (Message 1173639)
Posted 978 days ago by Profile Cheng Fan Soon
When using a high efficiency PSU (90%), It is a good idea to use one PSU to power two motherboards.
Because those high efficiency PSU are very expensive and also high power ( > 800 Watts).
A normal Intel I5 or I7 plus MB consume only about 200Watts, or maybe 300watts(with a high end graphics card).

An article about one PSU power two MBs:
http://www.overclock.net/t/112866/how-to-use-one-power-supply-to-power-two-motherboards-safely
20) Message boards : Science (non-SETI) : Speed of light broken again as scientists test neutrino result (Message 1172582)
Posted 982 days ago by Profile Cheng Fan Soon
But than why jets of matter from Quasar only able to move close to the speed of light, not exceed the speed of light?

http://en.wikipedia.org/wiki/Quasar#Properties
http://en.wikipedia.org/wiki/Blazar#Relativistic_beaming


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