Navigation Links
'Invisibility cloak' could protect against earthquakes
Date:7/20/2009

LIVERPOOL, UK 20 July 2009: Research at the University of Liverpool has shown it is possible to develop an 'invisibility cloak' to protect buildings from earthquakes.

The seismic waves produced by earthquakes include body waves which travel through the earth and surface waves which travel across it. The new technology controls the path of surface waves which are the most damaging and responsible for much of the destruction which follows earthquakes.

The technology involves the use of concentric rings of plastic which could be fitted to the Earth's surface to divert surface waves. By controlling the stiffness and elasticity of the rings, waves travelling through the 'cloak' pass smoothly into the material and are compressed into small fluctuations in pressure and density. The path of the surface waves can be made into an arc that directs the waves outside the protective cloak. The technique could be applied to buildings by installing the rings into foundations.

Sebastien Guenneau, from the University's Department of Mathematics, who developed the technology with Stefan Enoch and Mohamed Farhat from the Fresnel Institute (CNRS) in Marseilles, France, explained: "We are able to 'tune' the cloak to the differing frequencies of incoming waves which means we can divert waves of a variety of frequencies. For each small frequency range, there is a pair of rings which does most of the work and these move about a lot bending up and down when they are hit by a wave at their frequency.

"The waves are then directed outside the cloak where they return to their previous size. The cloak does not reflect waves they continue to travel behind it with the same intensity. At this stage, therefore, we can only transfer the risk from one area to another, rather than eliminate it completely."

He added: "This work has enormous potential in offering protection for densely populated areas of the world at risk from earthquakes. The challenge now is to turn our theories into real applications that can save lives small scale experiments are underway."

Seismic waves also include coupled pressure and shear body waves which are less destructive than surface waves. Sebastien Guenneau and Sasha Movchan at the University of Liverpool, together with Michele Brun at Cagliari University, have designed an 'elastic' cloak to protect against these particularseismic waves and the team is currently seeking a suitable material to accommodate the elastic parameters of the cloak.


'/>"/>

Contact: Kate Spark
kate.spark@liv.ac.uk
44-151-794-2247
University of Liverpool
Source:Eurekalert

Related biology news :

1. HIV pays a price for invisibility
2. A viral cloaking device
3. Carnegie Mellon researchers create invisibiity cloak
4. U of A honored for research that could help 30 million Brazilians
5. Clean fuels could reduce deaths from ship smokestacks by 40,000 annually
6. US-Mexico border wall could threaten wildlife species
7. Pacific Northwest forests could store more carbon, help address greenhouse issues
8. New e-science service could accelerate cancer research
9. New MRI technique could mean fewer breast biopsies in high-risk women
10. New biomarker method could increase the number of diagnostic tests for cancer
11. Super-sleepers could help super-sizers!
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/24/2017)... Controller General of Immigration from Maldives Mr. Mohamed Anwar and ... international IAIR Award for the most innovative high security ePassport and eGates  ... ... Maldives Immigration Controller General, Mr. Mohamed Anwar ... right) have received the IAIR award for the "Most innovative high security ...
(Date:3/22/2017)...   Neurotechnology , a provider of high-precision ... the release of the SentiVeillance 6.0 ... recognition using up to 10 surveillance, security and ... new version uses deep neural-network-based facial detection and ... a Graphing Processing Unit (GPU) for enhanced speed. ...
(Date:3/20/2017)... 20, 2017 PMD Healthcare announces the release ... Wellness Management System (WMS), a remote, real-time lung health ... PMD Healthcare is a Medical Device, Digital Health, and ... to creating innovative solutions that empower people to improve ... focus, PMD developed the first ever personal spirometer, Spiro ...
Breaking Biology News(10 mins):
(Date:5/16/2017)... Seattle, WA (PRWEB) , ... ... ... Genomics announced today the general availability of its new ProxiMeta™ Hi-C metagenomic ... samples easily and affordably—without culturing or high-molecular-weight DNA extraction—speeding research insights at ...
(Date:5/16/2017)... Westlake Village, CA (PRWEB) , ... May 16, ... ... in personalized medicine technology and cancer diagnostics, has released its ClearID Lung Cancer ... be altered in lung cancer, this new test is designed to quickly and ...
(Date:5/16/2017)... ... (PRWEB) May 16, 2017 , ... ... Association of Orthopaedic Surgeons (CAOS), long-standing development partners Invibio Biomaterial Solutions, UK, ... spine surgery workshop to help expand knowledge of the implantation of Double ...
(Date:5/15/2017)... PA (PRWEB) , ... May 15, 2017 , ... ... insights in a presentation of “The Key Role of Specifications in Process Validation,” at ... of Philadelphia . The event will bring together leaders from the pharmaceutical and biotech ...
Breaking Biology Technology: