Alleged thermal erosional structures near Farnham, England: Response

Evaluation of Nonlinear Response of Structures to Near-Fault Ground Motions and the Comparison of Results with Near-Fault Simulated Records

Near-fault ground motions have caused very much damage in the vicinity of seismic sources during recent earthquakes. It is well known that under specific circumstances, intensive ground shakings near fault ruptures may be characterized by short-duration impulsive motions. This pulse-type motion is generally particular to the forward direction, where the fault rupture propagates towards the site...

Microdynamics and Thermal Snap Response of Deployable Space Structures

Near-field thermal transistor.

Using a block of three separated solid elements, a thermal source and drain together with a gate made of an insulator-metal transition material exchanging near-field thermal radiation, we introduce a nanoscale analog of a field-effect transistor that is able to control the flow of heat exchanged by evanescent thermal photons between two bodies. By changing the gate temperature around its critic...

The Erosional History of Athabasca

As one of the candidate Mars Exploration Rover (MER) landing sites a landing ellipse in the Athabasca Valles was under consideration. The erosional history of the proposed area is complex and diverse. Geology. The valley system is located in an area between 200 and 220 W longitude and extends from the equator to 15 northern latitude to an area called Cerberus Planitia, part of Elysium Planitia....

Erosional consequence of saltcedar control.

Removal of nonnative riparian trees is accelerating to conserve water and improve habitat for native species. Widespread control of dominant species, however, can lead to unintended erosion. Helicopter herbicide application in 2003 along a 12-km reach of the Rio Puerco, New Mexico, eliminated the target invasive species saltcedar (Tamarix spp.), which dominated the floodplain, as well as the na...