“Schlieren is German for “streaks”; in this case it refers to regions of different densities in a gas or a liquid, which can be photographed as shadows using a special technique.”
Wikipedia entry here. Dr. Gary Settles’ page at Penn State’s Gas Dynamics Lab. A 4:00 minute presentation by Dr Settles’ on his work…lots of cool images:
If tea can be used as an indicator of Southern cultural influence, then I’ll bet the sweet tea line somewhat mirrors lines of noticable Southern accent:
Is there a Virginia town or county where you’ve noticed a difference?
Update: The map is a fake?
See Also: From Strange Maps: Do You Say Soda, Pop, or Coke?
Carl Hoefer reviews Robert DiSalle’s Understanding Space-Time: The Philosophical Development of Physics from Newton to Einstein here, and Bradford Skow reviews Harvey Brown’s Physical Relativity: Space-time Structure from a Dynamical Perspective here.
DiSalle’s goals are very ambitious, and in broad terms they are threefold. He wants to (1) direct philosophers away from the canonical absolute/relational disputes, (2) reshape our understanding of the motivations, arguments, and achievements of the two giants of space-time physics (Newton and Einstein), and (3) refute, in passing, the Kuhnian view that the main paradigm changes in space-time physics are essentially arational and impossible to justify via non-circular arguments.
Newton’s and Einstein’s theories are:
“…frameworks established ‘for the interpretation of phenomena, not a kind of mechanism or hypothesis to explain them’”
The framework of a framework?
What do astronomers do? How do you take pictures deep into space?
Maybe you find a sense of awe, mystery and beauty elsewhere in your life, but don’t forget the night sky.
Also mentioned: The Sloan Digital Sky Survey. The Cosmic Variance blog.
by neilcreek
Back to the moon…a moon base…a Mars base…beyond?
“The human race has existed as a separate species for about two million years. Civilisation began about 10,000 years ago, and the rate of development has been steadily increasing. But, if the human race is to continue for another million years, we will have to boldly go where no one has gone before.”