We chased our pleasures here
Dug our treasures there  –

The Doors

 Fred is doing well and sends his best regards to all. He is working hard at his physical therapy and expects to be back on his feet soon. Fred is finding photo subjects, even in his small room, and will be posting some results on GMG and his Facebook page. His spirits are good and his will to get better is strong. Can’t wait to see him back behind the counter at Bodin Historic Photo.

Sand Ripples and Dunes
Annual Review of Fluid Mechanics

An erodible bed sheared by a fluid flow, gas or liquid, is generally unstable, and bed forms grow. This review discusses the following issues, in light of the recent literature: What are the relevant dynamical mechanisms controlling the emergence of bed forms? Do they form by linear instability or nonlinear processes such as pattern coarsening? What determines their timescales and length scales, so different in air and water? What are the similarities and differences between aeolian and subaqueous patterns? What is the influence of the mode of transport: bed load, saltation, or suspension? Can bed forms emerge under any hydrodynamical regime, laminar and turbulent? Guided by these questions, we propose a unified description of bed-form growth and saturation, emphasizing the hydrodynamical regime in the inner layer and the relaxation phenomena associated with particle transport.

BY WALT WHITMAN

When I heard the learn’d astronomer,
When the proofs, the figures, were ranged in columns before me,
When I was shown the charts and diagrams, to add, divide, and measure them,
When I sitting heard the astronomer where he lectured with much applause in the lecture-room,
How soon unaccountable I became tired and sick,
Till rising and gliding out I wander’d off by myself,
In the mystical moist night-air, and from time to time,
Look’d up in perfect silence at the stars.

 “At least when I get on the Boston train I have a good chance of landing in the South Station
And not in that part of the daily press which is reserved for victims of aviation.”
― Ogden Nash

 Shot in Death Valley, California. As always, click image to enlarge.

Check out Brian’s photography at http://backwardglance.wordpress.com

 Encore, originally posted February 20, 2012.

See more of my street photography at
http://www.slicesoflifeimages.wordpress.com