blike

Thanks glider, great post!

What faf did was put the equation in terms of x= by manipulating it algebra style, like so: 4/x + 2/y = 1 [multiply everything by x, and y, to get rid of the x and y terms in the denominators] 4y + 2x = 1xy [subract 2x to get x's on one side] 4y = 1xy - 2x [take the common factor on the right side (which is x)] 4y = x(y - 2) [divide by (y-2) to get x alone] 4y / (y-2) = x --- since we now know what X equals, we can write the ordered pair like this: (4y / (y-2), y) ----------------------------- Now that I look at it, however, that answer is not sufficient, because you're asking how many INTEGER ordered pairs. If it were simply ordered pairs, the solutions would be infinite, as the equation indicates. However, i'll have to ge tback to you because its INTEGER ordered pairs. its probably something simple too, and were all just overlooking it

Well, there tends to be general trends in science. Like right now everyone is interested in quantum mechanics and such. 50 Years ago biologists were interested in DNA. So when people discover something at relatively close times, its usually because thats what the brunt of scientific research is being done on.

Never really heard of it. I have heard of computers predicting financial models using past data, but I didn't really know there was a study devoted to studying the behavior of a stock trader. Is this somethig you're doing reseach on?

did you understand how he arrived at that conclusion?

in my defense: blike again (10:58:27 PM): how many ordered pairs (x,y) of positive integers are solutions to 4/x + 2/y = 1? blike again (10:58:30 PM): infinite right? after receiving no response from faf (he was probably frantically working it out), i assumed i was wrong, so i switched my answer which led to the above exchange. as my bio professor always says: "Stick with your first answer and you'll save yourself slipups"

v

haha, I guess it'd help if i read the posts. Nature does not have a goal in mind when it gives us clones. At this point, our goals and intentions may be good, but good intentions only last so long.

Nature never gives us human clones, except instances of twins.

This looks like a problem for faf.. I'm still learning basic laws for differentiation

It seems like a fellow named Rupert Sheldrake is behind some of the major research. Rupert Sheldrake is a former Research Fellow of the Royal Society at Cambridge University and has a Ph.D in biochemistry.

According to some websites there is a big push to get results published in respected journals; because the results are often significant. One specific study was cited where 41% of dogs knew when their owner was coming home, even after all the variables were changed around that the dog might normally recognize that would signal "coming home". Ever notice how birds change direction in flight at the same time? Or massive schools of fish all change direction? Ever know when someone is staring at you behind your back? Some attribute this to "morphic resonance".

you and faf would get along, milin.... if you weren't so ignorant edit: and if your curfew wasn't 11pm on weekends. edit #2: and your future didn't involve 7-11 and dunkin donuts

thanks for clearing that up.

But things don't actually exist in a wave function do they? "Heisenberg now argued that such concepts as orbits of electrons do not exist in nature unless and until we observe them."

ok, so what exactly is collapsing the wave function?

So when measurements are taken using an "interaction free" device, does it collapse the wave function?

But in your analogy it is assumed that the uncertainty is a direct result of unprecise or inaccurate measurements (i.e. distrubing the object when being measured). Heisenberg asserted that no matter the accuracy of the instruments, quantum mechanics will limit the precision when two properties are measured at the same time.

Interesting book, but near the end I think he starts stretching it a bit.

Random errors are selected for by nature. The bad ones are weeded out, and the good ones dominate.

I upgraded the forum, if you find any errors let us know. thx

The article says its going to take 10 years to build! Supposedly its the final step between current test reactors and the first commercial fusion reactor. "The goal of Iter is to produce 500 megawatts of fusion power for 500 seconds or longer during each individual fusion experiment and in doing so demonstrate essential technologies for a commercial reactor. Iter could begin construction in 2006 and be operational in 2014. Fusion research would last for up to 20 years." looks like I'm going to be an old man before I see any of these being built commercially in the US.

thanks man, i'll check it out

lol. yes, do explain.

My teacher allows us to turn in a paper for extra credit on a practical use of calculus. I'm looking to do a paper on how calculus can be applied in medicine and/or life science. Anyone have any suggestions on topics?