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Comment: Stock market gambling (Score 1) 59

by goombah99 (#48181653) Attached to: Brain Patterns Give Clues To Why Some People Just Keep Gambling

Investing in the stock market, is generally betting in a situation where there is a net win. That is, most of the time, even bad investments don't lose money in the long run, they just don't win as much as you could have one, or they have greater fluctuations than a portfolio with an equivalent return.

Day trading is however very addictivive. even people who only trade weekly will still check their stocks many times a day. As the problem goes on, penny stocks become a big lure as they have higher fluctuations giving one chances to Win big (a great feeling compared to inexorable index funds slow creep).

So does one have to be a masochist to be addicted to gambling? apparently not.

Even index funds are somewhat crazy. Right now the SP 500 trades at high price to earnings multiples even in stocks are unlikely to achieve earnings that can match that price. It's a combination of the greater fool theory along with the unusual condition that there's few "safe" places to put money right now. There's too few shares of stock in health companies (due to the slow economic growth) being chased by too many dollars. As long as the chase continues then it's "safe". But long term enormous growth is required to match those P/E multiples. Google and Amazon have essentially no earnings.

Comment: how does this work at all? (Score 3, Interesting) 79

by goombah99 (#48141063) Attached to: Navy Tests Unpowered Exoskeleton

How does this work. They show a guy with a grinder mvong it around on a wall up near his head. Now how did he get into that position and how is he able to move the grinder around. If all the joints are loose then they offer no support. If they are tight then he can't move. And if he selectively locks the myriad number of joind it will be a confusing puzzle to get the the right set locked to support weight along some axis but not others. Does this mean all grinding must be back and forth and not up and down? if you are grinding along a verical edge how do you avoid repeately lifting this.You would be lifting both the weight of the grinder and the weight of the fortis frame every time.

the frame looks heavy including a cantaleivered weight in the back. SO it seems like its adding a lot of weight. How does it manage to carry it's own weight as you move. Or are you repeately lifting this when you bend over or walk somewhere.?

very puzzling how this works

Comment: like the iwatch (Score 2) 100

LOL Microsoft developed an analog keyboard. OR they just remembered how their palm pilots worked and ported it to android..

my thought exactly, and then I recall how blackberry took a big chunk of the pda market from palm. perhaps the smaller form factor will make it compelling again.

on the otherhand apple watch already demoed transmitting drawn shapes on their watch presumably for the same rationale of input to a small form factor.

Comment: ram jets (Score 1) 403

by goombah99 (#48092877) Attached to: Fuel Efficiency Numbers Overstate MPG More For Cars With Small Engines

For what it's worth, the physical interpretation of this would be that a car with a fuel economy of a given area would be able to drive without needing on-board fuel storage if it were following a trail of fuel with that cross sectional area.

which would make it the ideal measure for something like a ram jet.

Comment: Skeptical about orbital angularmomentum in photons (Score 4, Interesting) 107

by goombah99 (#48083603) Attached to: First Teleportation of Multiple Quantum Properties of a Single Photon

It can exist, but virtually every paper I've ever read, especially any that mention optical vorticies confuses Orbital Angular momentum with simple minded othogonal function decompositions of spatial light patterns. Any spatial pattern including this printed page can be written in terms of legendre polynomials or YLMs but that in itself does not give it orbital angular momentum quantum numbers. That's a whole nother ball of wax. To understand the latter you have to puzzle out why you think a half-wave plate (a circular polarizer) is a linear device that doesn't change the frequency of the photon. (after all, for every reversal of polarization, the earth or whatever the device is attached to has to accelerate to absorb the equal and opposite polarization).

FORTRAN is for pipe stress freaks and crystallography weenies.