6,337 reputation
1322
bio website en.wikipedia.org/wiki/…
location United States
age 69
visits member for 2 years, 7 months
seen 5 hours ago

BS Mechanical Engr.
PhD CS(AI)
CS Prof (4yr)
Numerous consulting jobs.
15 yr at http://www.pharsight.com
Published book on CS & several articles
4 kids, 2 grand
Pilot(student)

P.S. The picture is a Beta-prime distribution. It shows the program speedup factors you can get if you see a problem twice in 2, 3, 4, and 5 samples.


Mar
28
answered Toy helicopters at very high altitude
Mar
27
revised Aren't all collisions elastic at some level?
added 31 characters in body
Mar
27
answered Aren't all collisions elastic at some level?
Mar
24
awarded  Nice Answer
Mar
23
revised What is sound in terms of acoustic sources?
added 210 characters in body
Mar
23
answered What is sound in terms of acoustic sources?
Mar
19
revised How does quantum world affect us and why should I care about it?
added 142 characters in body
Mar
19
comment Can an extremely small force lift a mountain in a hydraulic system? If not, then why not?
Just a tip: When I hear "If not, then why not?" I go uh-oh - sounds like a homework question.
Mar
19
answered How does quantum world affect us and why should I care about it?
Mar
18
comment How do birds generate thrust?
You may enjoy reading some or all of John S. Denker's on-line book about aviation. It will answer all your questions better than I can.
Mar
18
comment How do birds generate thrust?
The trouble is, it's not that simple. That would only work if the air could not escape around the wing and if somehow more air were propelled to the rear. (I think Einstein said find the simplest possible explanation - but no simpler :)
Mar
17
answered How do birds generate thrust?
Mar
17
awarded  Enlightened
Mar
17
awarded  Nice Answer
Mar
16
revised Does a resistor absorb and dissipate energy or just regulate the charge flow?
added 867 characters in body
Mar
16
comment Does a resistor absorb and dissipate energy or just regulate the charge flow?
@GM: No, because in any moment in which there is a voltage across the resistor and a current flowing through it, energy is lost. A resistor will lose it through heat. Something like a motor will lose it through mechanical work. A capacitor or inductor will lose it by building up energy in its field. For a resistor, it will generate heat - there's no other way for it to behave.
Mar
16
revised Does a resistor absorb and dissipate energy or just regulate the charge flow?
added 100 characters in body
Mar
16
answered Does a resistor absorb and dissipate energy or just regulate the charge flow?
Mar
13
revised Turbofan: Efficiency wrt. the bypass ratio: “a lot of slow air > a little faster air”?
added 35 characters in body
Mar
13
answered Turbofan: Efficiency wrt. the bypass ratio: “a lot of slow air > a little faster air”?