Mapping disaster zones

Article Abstract:

Satellite and aerial images are critical in the aftermath of any disaster for identifying priorities, planning logistics and working out access routes for relief operations, as proved by Google Earth software in Hurricane Katrina in the US and the Pakistan earthquake. Making these images and data public raise questions about the privacy but there is more to be gained than lost as these images can move the public to make greater contributions to the disaster relief works.

United States, Other Justice, Public Order, and Safety Activities, Disaster Aid, Disaster Relief & Insurance, Usage, Technology application, Disaster relief, Mapping software, Post-disaster reconstruction

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Mapping stress with ultrasound

Article Abstract:

An acoustic microscopy method to measure stress is based on the changes in the polarizations and phases of acoustic waves in an isotropic elastic medium produced by stress induced anisotropies. The interference between waves due to a change in their phase exhibits the stress patterns. The use of acoustic waves of different wavelengths allows the imaging of stress in objects of variable sizes from microelectric devices to welds in pressure vessels.

Research, Observations, Anisotropy, Strains and stresses, Stresses (Materials), Acoustic imaging

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