Posts by SciManStev


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1) Message boards : SETI@home Science : Scientific American: If There Are Aliens Out There, Where Are They? (Message 1762242)
Posted 3 days ago by Profile SciManStevProject donor
Photons are traditionally said to be massless. This is a figure of speech that physicists use to describe something about how a photon's particle-like properties are described by the language of special relativity.

It is almost certainly impossible to do any experiment that would establish the photon rest mass to be exactly zero. The best we can hope to do is place limits on it. A non-zero rest mass would introduce a small damping factor in the inverse square Coulomb law of electrostatic forces. That means the electrostatic force would be weaker over very large distances.
That is travel time for the astronauts. How many years pass on earth between departure and the return to earth?

At 85% light speed, there would be some relativistic effects, but not to bad. The real changes would be at over 95% light speed, increasing rapidly as light speed is approached.

Steve
2) Message boards : SETI@home Science : Scientific American: If There Are Aliens Out There, Where Are They? (Message 1762240)
Posted 3 days ago by Profile SciManStevProject donor
85% of light speed is quite acceptable. That means the nearest star could be reached in 5.3 years, say a 12 year round trip. So are these 85% designs feasible?

The design I read about has a scoop almost the size of the moon, that looks like a radio dish. In space, these is about 1 atom of hydrogen per the volume of a grape fruit. The scoop would gather the hydrogen, then fuse it releasing energy. the vessel would be self refueling, but the size would be enormous. I keep wondering what would happen if a micrometeorite or larger object hit it somewhere.


5.3 years if it doesn't takes years to accelerate up to speed and years to decelerate. That could possibly double, triple or more the time from what I understand.


That is very true. I don't think the human form could withstand much more than 1 G for lengthy amounts of time. I think the idea of Star Wars ships just zipping around, even at normal speeds would tear a person to pieces.

Steve
3) Message boards : SETI@home Science : Scientific American: If There Are Aliens Out There, Where Are They? (Message 1761948)
Posted 4 days ago by Profile SciManStevProject donor
A photon is a mass-less particle. If you add more energy to it, it just has more energy, but doesn't go any faster. Even light speed is tricky to obtain. Some of the best ship designs I have read about would only achieve about 85% light speed. most are around 15%. Interstellar travel does seem extremely difficult, but intergalactic travel seems inconceivable.

Steve
4) Message boards : SETI@home Science : Scientific American: If There Are Aliens Out There, Where Are They? (Message 1761904)
Posted 4 days ago by Profile SciManStevProject donor
The clue is to fool physics into thinking you have zero mass, then the restriction won't apply. Solve that one and FTL is there.


I don't think so. Even with zero mass, there is no way to accelerate beyond light speed. If you need a force such that with every action, there is an equal and opposite reaction, and no force exists to create that reaction, then mass doesn't matter.

Steve
5) Message boards : SETI@home Science : strange signal ? best pulse score: 1.06 (Message 1756596)
Posted 23 days ago by Profile SciManStevProject donor
We all get them.
http://setiathome.berkeley.edu/sci_status.html
What happens next, is that the results are run through another process, which has not been working lately to shift out possible candidates.
http://setiathome.berkeley.edu/forum_forum.php?id=830
Once we have identified a possible target, we take another data sample, analyze that, and see if it repeats.

The verification process for any given signal is very stringent.
The scientists running the project want to make sure we have something valid before we alert the world.

Steve
6) Message boards : Number crunching : Dumb Question(s) About Seti v8 (Message 1754015)
Posted 5 Jan 2016 by Profile SciManStevProject donor
It's not a dumb question, but I do know that Seti has had several huge outages in the past, and this is just a smaller one. It will all work out.

Steve
7) Message boards : News : SETI@home Version 8 has been released. (Message 1753368)
Posted 2 Jan 2016 by Profile SciManStevProject donor
Hi. Too bad Mac users still penalized for not being able to "show graphics" Thought it was to be a screen saver.

The screen saver just slows down data processing, and gives eye candy in return.

Steve
8) Message boards : Science (non-SETI) : Moon (Message 1752262)
Posted 29 Dec 2015 by Profile SciManStevProject donor
Lower stage boosters fall back to Earth, but a number of orbital stage boosters are still up there, all be it in decaying orbits.
Boosters are basically tubes, so could either be used as tubes, or sources of the sheet metal and composites they contain.
Further on the idea of scavenging space junk, what about solar panels from dead sattelites?

One issue I see about old solar panels, is that the new ones are much more efficient, and the output of all solar panels begins to decay after about 10 years. I am not sure if the materials can be recycled, but the panels themselves, most likely not worth the effort.

Steve
9) Message boards : Cafe SETI : Thinking of going SOLAR and/or WIND? (Message 1752250)
Posted 29 Dec 2015 by Profile SciManStevProject donor
The company I am currently buying power from just locked me in for 18 months at 10.19 cents per KWh, which means that with the Solar City plan, I would lose money for several years. That with all my other concerns has officially made going solar at this time impracticable. I have rejected the offer.

Steve


10,19 cents? Is that solely the energy cost? Would be an awful lot if it were..

Yes, transmission over the lines is additional, but for here, that is the lowest rate there is. Recently, I stopped crunching for a couple of months. I had my computer, chiller, and support hardware running, but it wasn't crunching. The savings in just electricity was $170 a month.

The 13.9 cents per KWh was higher from solar, and it was set to increase every year, while my current rate is not. I do understand that a lot of my bill is paying for the transmission of the electricity over the power lines, and electricity generated locally would not incur that delivery charge.

In the future, I may re-visit this, as i would really like renewable, energy independence. What SolarCity was offering me, just wasn't where I wanted to go yet. One of the worst aspects was that I could not use solar to supplement my generator in case of a power outage. by law, all solar contributions had to be shut off during a power outage, leaving me with just my generator, exactly as I do now in case of power outages.


Steve
10) Message boards : Cafe SETI : A CHRISTMAS MIRACLE!!! (Message 1749446)
Posted 15 Dec 2015 by Profile SciManStevProject donor
That is excellent news! I am so happy things are working out so well, and Sauron has come home!

Steve
11) Message boards : Number crunching : AVG creating havoc with seti rig (Message 1749223)
Posted 14 Dec 2015 by Profile SciManStevProject donor
I use ESET, and have installed it on hundreds of computer repairs. It usually bounces around the top 5 antivirus programs, but things can change from day to day. What I do like is two fold. First, it uses very few resources, and scans every file coming into or leaving your computer. Second I have never had a compatibility issue with either software of hardware. It is a perfect solution for me, and many of my previous customers. The last infection I got myself was close to 20 years ago.

Steve
12) Message boards : Science (non-SETI) : Enceladus (Message 1749215)
Posted 14 Dec 2015 by Profile SciManStevProject donor
One of the problems we are finding with Mars, is that now we know there has been running water on the surface, the rover isn't aloud to get any where near it, in case it brought some microbe(s) from earth. Even though decontamination was stringent, the slightest contamination could continue for thousands of years, and start a whole new evolutionary tree. At best, it may disguise any native life, and cloud the science. I would guess that any other exploration would have the same problem.

Steve

I suspect until we are able to build the craft entirely on the surface of the moon, in the hard vacuum, robotically, we won't be able to have some assurance it isn't contaminated. Extremophiles seem to be everywhere.


I don't really understand the fastidiousness about "perfection" with the robot cleanliness if plans are being made to send people to Mars.

I don't either, but perhaps they will come up with a method to test cleanly, before we do contaminate things. I can just imagine the first person to throw a cigarette butt out on the surface of mars.

Steve
13) Message boards : Science (non-SETI) : Enceladus (Message 1749203)
Posted 14 Dec 2015 by Profile SciManStevProject donor
One of the problems we are finding with Mars, is that now we know there has been running water on the surface, the rover isn't aloud to get any where near it, in case it brought some microbe(s) from earth. Even though decontamination was stringent, the slightest contamination could continue for thousands of years, and start a whole new evolutionary tree. At best, it may disguise any native life, and cloud the science. I would guess that any other exploration would have the same problem.

Steve
14) Message boards : Number crunching : Windows 10 - Yea or Nay? (Message 1747548)
Posted 7 Dec 2015 by Profile SciManStevProject donor
Just turn updates of.
You can still install important updates manual.
I have set my machine this way since the very first day.

Trust no one.

I may have to do that, but that means I have to keep logging into my fathers computer, and I never do that unless he knows I am doing so. I like it when I don't have to mess with his system, but at least he is back to Win 7 for now.

Steve
15) Message boards : Number crunching : Windows 10 - Yea or Nay? (Message 1747494)
Posted 7 Dec 2015 by Profile SciManStevProject donor
And I finally got my fathers machine back to Win 7. It seems Microsoft is planning on making it impossible for him to keep it that way. :(

Steve
16) Message boards : Cafe SETI : Do you Sleep well. (Message 1747483)
Posted 7 Dec 2015 by Profile SciManStevProject donor
My computer makes 61 dB of white noise, with the eight 140 mm radiator fans, and the 250 watt chiller turning on and off, plus the four 8" fans in the tower. In the summer that is accompanied by the AC. It is like sleeping on the deck of an aircraft carrier, but if for some reason, that noise changes, I wake right up.

On the other hand, sometimes I don't get to sleep until 2-3 in the morning, and sometimes I wake up at 2-3 in the morning and can't get back to sleep. We are used to the white noise, so that doesn't contribute to missing sleep.

Steve
17) Message boards : Politics : "Evil is Evil" (Message 1747447)
Posted 7 Dec 2015 by Profile SciManStevProject donor
For as long as humans have been around, we have committed horrific acts, that other than the scope, mirror what is in the animal world. Take for example that male lions sometimes kill and eat their own, or others offspring's. This is certainly not limited to lions, but meercats, certain monkeys, and other animals as well. Chimps actually take weapons, and war against other chimp tribes, killing, playing with, and eating chimps from another group. I have never seen a real difference between human and other animal behavior, and I don't see humans as different than animals. I see them as another species of animal, subject to the same behaviors. Humans can either be very cooperative, or very hostile, and each individual can change based on environmental conditions as you pointed out. I tend to stay away from the "good and evil" label, and use something such as "just the way it is". I have often heard humans referred to as the "killer ape".

Steve
18) Message boards : Cafe SETI : Holiday photographs (Message 1746851)
Posted 4 Dec 2015 by Profile SciManStevProject donor
When I was young we had a Great Dane. One year we set up the Christmas tree, and the dog was delighted we finally brought the bathroom indoors.......

We had to remove all the decorations, and put the tree in the bath tub.

Steve
19) Message boards : Number crunching : Windows 10 - Yea or Nay? (Message 1746266)
Posted 2 Dec 2015 by Profile SciManStevProject donor
I wish there was a single switch that told Microsoft "No I don't want this installed." and be done with it.

There are 2 programs to fight that:
http://setiathome.berkeley.edu/forum_thread.php?id=77121&postid=1742579#1742579

"GWX Control Panel" have 'Monitor Mode' (new in version 1.6)

I will try those if I ever get control of my fathers system. So far, it won't let me, and I don't know if his system is off, or waiting on some input from him.

He has pneumonia now, and is very weak and frail. I can't even ask him to see if his computer is on. :(

Steve
20) Message boards : Number crunching : Windows 10 - Yea or Nay? (Message 1746099)
Posted 1 Dec 2015 by Profile SciManStevProject donor
I have used Win 10 for a while now, and am used to it. What I don't like is its determination to be installed regardless of user preferences. Yes, we here can remove certain updates, even when they are re-released, or do other hacks to prevent it from installing, but my aging father accidentally installed it, after I had told him not to. He is too old and computer illiterate to deal with the changes. Now, I will have to log on remotely, and roll back the installation to Win 7. What Microsoft doesn't seem to understand, is that sometimes change is not good. I was far more tolerant of Win 10, when it hadn't affected my father. Now, I am quite upset. I wish there was a single switch that told Microsoft "No I don't want this installed." and be done with it.

Steve

Edit: My father is 1500 miles away from me, so it's not like I can hop in the car, and go fix things.


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