21 MAR 2015 by ideonexus
Running In Elderly Promotes Walking-Economy of Youth
Older runners had a 7–10% better walking economy than older walkers over the range of speeds tested (p = .016) and had walking economy similar to young sedentary adults over a similar range of speeds (p = .237). We found no substantial biomechanical differences between older walkers and runners. In contrast to older runners, older walkers had similar walking economy as older sedentary adults (p = .461) and ~26% worse walking economy than young adults (p<.0001).Folksonomies: longevity
Folksonomies: longevity
1 05 OCT 2014 by ideonexus
Relativity in Space Warfare
"Most of you are too young to remember the term future shock. Back in the seventies, some people felt that technological progress was so rapid that people, normal people, couldn't cope with it; that they wouldn't have time to get used to the present before the future was upon them. A man named Toffler coined the term future shock to describe this situation." The commodore could get pretty academic.
"We're caught up in a physical situation that resembles this scholarly concept. The result has... 1 
notes
notesHaving to travel at speeds of light means facing a future version of the enemy and that you are attacking them from the past.
31 JUL 2013 by ideonexus
Science Manipulates Language to Make it More Precise
Let us consider two spheres moving in different di-
rections on a smooth table. So as to have a definite
picture, we may assume the two directions perpendicu-
lar to each other. Since there are no external forces
acting, the motions are perfectly uniform. Suppose,
further, that the speeds are equal, that is, both cover
the same distance in the same interval of time. But
is it correct to say that the two spheres have the same
velocity? The answer can be yes or no ! If the speedo-
mete...
1 The example is "velocity" which in common parlance is the same as "speed," but in science it means "speed and direction."
01 JAN 2012 by ideonexus
Space Exploration Costs the Same as Exploring the World
The Solar System is much vaster than the Earth, but the speeds of our
spacecraft are, of course, much greater than the speeds of the sailing ships of the
fifteenth and sixteenth centuries. The spacecraft trip from the Earth to the Moon
is faster than was the galleon trip from Spain to the Canary Islands. The voyage
from Earth to Mars will take as long as did the sailing time from England to North
America; the journey from Earth to the moons of Jupiter will require about the
same time as did t...Folksonomies: economics space exploration
Folksonomies: economics space exploration
Europe spent as much money proportionally to discover America as it would cost us to venture to Mars.
01 JUL 2011 by ideonexus
Two Examples of Leaping to Conclusions without the Facts
Let me give you two examples of leaping to conclusions without
the full facts. Back in the 1890’s, a certain California newspaper
was apprehensive about the harmful effects the railroads would
have on the environment. If the trains crossed the Mojave to get
to the Pacific, this newspaper editorialized, “the huge iron rails
will reverse the Earth’s magnetic field with catastrophic effects.”
Now that’s real science! One hundred forty years ago, the Royal
Society in England warned agai... 1 notes
notesPeople, even scientists, thought the train would come apart and asphyxiate its passengers at speeds of 35 MPH, and the rocket was disregarded by the military until the Germans adopted it.
