Posts by Chris S

1) Message boards : News : Free Speech and SETI@home (Message 1869036)
Posted 23 minutes ago by Profile Chris SCrowdfunding Project Donor
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Good Morning Dr Korpela. I would say that your command of the English language puts many to shame quite frankly. Quite apart from which, a final PhD thesis is unlikely to be accepted if is written in pidgin English!
2) Message boards : News : Free Speech and SETI@home (Message 1868926)
Posted 23 hours ago by Profile Chris SCrowdfunding Project Donor
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Ah yes, shades of dear Alan Greenspan :-)
3) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868925)
Posted 23 hours ago by Profile Chris SCrowdfunding Project Donor
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There would be a theoretical "exact" midnight but it couldn't of course be measured.
That is exactly what Rob is also saying. That in theory there will be an EXACT point of midnight, but that it couldn't be measured by any tools or techniques that we currently have.

It still seems to me that time will instantaneously change from before midnight to after midnight, with no exact midnight being possible. But it seems I am wrong, and I'm still not sure why!!

A similar conundrum is this. Take a piston in a car engine, is there ever a time at the top if its stroke that the piston is stationary? In theory no, because the exact moment it reaches the top of its stroke, it will begin its down stroke. In practice there will be a running clearance between the gudgeon pin and its bearing. The con rod will pull down through that clearance before moving the piston itself. Again, at 5000rpm we don't have the tools to measure whether that is true or not.

But the point is that for all practical day to day purposes, if an accurate clock indicates midnight then it IS midnight. The same for Achilles, I/2 an inch behind the bus he hops on it, 1/2 an inch behind the tortoise he steps over it. pistons keep moving, and Infinity is simply never ending. Let the philosophers and scientists worry about anything else.
4) Message boards : SETI@home Science : HTTPS Secure site (Message 1868826)
Posted 1 day ago by Profile Chris SCrowdfunding Project Donor
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I thought it already has??

https://setiathome.berkeley.edu/forum_thread.php?id=81463#1868822
5) Message boards : Number crunching : Memory freeing program........ (Message 1868779)
Posted 1 day ago by Profile Chris SCrowdfunding Project Donor
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Hi Mark, good to see you back. I use memory Cleaner 2.20 by Koshy John, also free. Works for me.

http://www.koshyjohn.com/software/
6) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868750)
Posted 1 day ago by Profile Chris SCrowdfunding Project Donor
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Another kind of concept like infinity is time, which must exist in any universe parallel or not. You can't see it, you can't hold it in your hand. What you can do however, is measure the elapse of time between any two events by means of clocks and watches and other instruments. You can observe a clock that indicates that it is midnight, you can observe it later and it might indicate 12.10, from that second observation you can deduce that 10 minutes have elapsed since you last observed the clock. That is a good enough estimate for day to day use.

In actuality though, at 1 millionth of a second to midnight it is before midnight. At 1 millionth of a second past midnight it is after midnight. The clock will instantaneously change from one to the other, therefore logically there is no point that it is exactly midnight, therefore time cannot be directly observed, only elapse of time.

Even if it could be shown that exactly midnight can be expressed in some way mathematically, it would surely be an abstract formula without any numerical value? That is why I liken it to infinity that also has no measurable value either, but we can do calculations with both.
7) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868588)
Posted 2 days ago by Profile Chris SCrowdfunding Project Donor
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Archimedes' "Method of Exhaustion" is a prime example.

It is, although not particularly used today, it paved the way for modern calculus by the ancients.

The idea originated in the late 5th century BC with Antiphon, although it is not entirely clear how well he understood it. The theory was made rigorous a few decades later by Eudoxus of Cnidus, who used it to calculate areas and volumes. It was later reinvented in China by Liu Hui in the 3rd century AD in order to find the area of a circle.

The method of exhaustion is seen as a precursor to the methods of calculus. The development of analytical geometry and rigorous integral calculus in the 17th-19th centuries subsumed the method of exhaustion so that it is no longer explicitly used to solve problems. An important alternative approach was Cavalieri's principle, also termed the "method of indivisibles", which eventually evolved into the infinitesimal calculus of Roberval, Torricelli, Wallis, Leibniz, and others.
8) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868575)
Posted 2 days ago by Profile Chris SCrowdfunding Project Donor
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Most of the Greeks e.g. Zeno, Plato, Pythagoras etc were about 500 BC or thereabouts, but weren't the Chinese and India at it earlier?

This infinity business is similar to Achilles and the tortoise, where in theory he can never catch it because he will always be a tiny bit away from it, the series continues ad infinitum. Oh look another way of saying for infinity!
9) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868571)
Posted 2 days ago by Profile Chris SCrowdfunding Project Donor
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Infinity doesn't exist as a item that you can see or hold in your hand, and as such it has no directly measurable parameters. It is a concept. But we can assign a symbol to it and use it in mathematical equations.

When we were naughty as kids mum always said we were driving her to infinity, we always said how far away was it and did dad know the route :-))

Calculus was "invented" long before the famous controversy between Newton and Leibniz, according to this book. And later in the 17th century, European mathematicians Isaac Barrow, René Descartes, Pierre de Fermat, Blaise Pascal, John Wallis and others discussed the idea of a derivative.

History
10) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868472)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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There just has to be a breakthrough in our current knowledge that currently isn't on the horizon. Let's hope we make that breakthrough one day.
11) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868469)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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Lab diamonds are either HPHT or CVD and cubic zirconia since 1976.

Scotty "Oh a keyboard - how quaint!".
12) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868464)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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I agree entirely, but we first have to discover Dilithium crystals don't we :-)
13) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868460)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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How true. Our solar system could keep us busy for the imaginable future.
Most certainly if we find concrete evidence of this elusive 9th planet which is postulated to be there. Some of the outer planet's moons are proving very interesting as well, they will take some getting to!
14) Message boards : Science (non-SETI) : Opportunity Rover (Message 1868457)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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Very much so yes. Totally amazing that it is still going and usable., when some of the others sadly languished.
15) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868453)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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Btw ∞ is not a number and can't be used in math.
Simple fact.

Infinity and maths
16) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868450)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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I think it's an axiom just as there are no proofs of parallel lines.

Proofs
17) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868446)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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I was thinking about using the VLF bubble concept for trips around the solar system within the next 100 years or so to protect against radiation, both cosmic and solar.

Certainly within our solar system and between the planets that might be feasible, but I think science would need to take some big leaps forward from our current knowledge to achieve that within the next 100 years. But yes if we did, then the stars could very well beckon. But not in our lifetimes I would think!
18) Message boards : Science (non-SETI) : Has a parallel universe been discovered? (Message 1868444)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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You are dead wrong!
Infinity doesn't exist in the real world!
Infinity is not a material substance that can be weighed or measured, it is a concept. And it can be represented by ∞ =1/0.
19) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868425)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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But not in this millennium.

So you are talking the year 3000 onwards?
20) Message boards : Science (non-SETI) : Man-made bubble surrounding Earth. (Message 1868421)
Posted 3 days ago by Profile Chris SCrowdfunding Project Donor
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Bussard proposed a ramjet variant of a fusion rocket capable of reasonable interstellar travel, using enormous electromagnetic fields
Interesting because the Star Trek shields were also composed of strong electromagnetic fields. Startrek science was more prophetic than many realised, or the writers read a lot. We haven't quite got replicators for "Earl Grey, hot!" yet, but 3D printing is a first step.


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