Navigation Links
Laughing hyenas, wailing levees, the sound of cheese and blaring bagpipes
Date:4/24/2009

loping a way to monitor pipes continuously and remotely using embedded, low-power ultrasonic detectors. His team will present the latest simulations and experimental evidence showing the detectors are feasible.

Detecting problems in buried pipes using ultrasound is tricky because they tend to disperse broadcast waves of sound. But this scattering is an ideal property for a technique called time reversal, where rich patterns created by dispersion can be analyzed to spot changes in a material. O'Donoughue's idea is send a wideband ultrasonic signal from one detector to another, through the walls of the pipe. When the signal bounces back and retraces its steps to the first detector, any structural imperfections show up as a disturbance in the combination of forwards and backwards waves. "If there is a crack or corrosion, the waves will not retrace their steps," says O'Donoughue.

The team is designing rings of these sensors to attach to the outside of pipes. The idea is to space out the rings, each which will eventually contain between four and eight sensors, 200 meters apart from each other. Simulations suggest a single sensor in each ring doubles the power output, that multiple sensors should further improve the performance, and that this configuration can detect a change in mass. The data from preliminary experiments show that time reversal should work in buried pipes.

The talk "Detection of structural faults in pipelines with time reversal" (3aSA7) by Nicholas O'Donoughue et al is at 10:15 a.m. on Wednesday, May 20, 2009. Abstract: http://asa.aip.org/web2/asa/abstracts/search.may09/asa664.html


11) LASER MAKES BIG BANGS UNDERWATER

Technologies that use underwater acoustics -- for sonar, communications, or navigation -- often require a piece of hardware in the water to create sound remotely. Physicist Ted Jones and his team at t
'/>"/>

Contact: Jason Bardi
jbardi@aip.org
301-209-3091
American Institute of Physics
Source:Eurekalert

Page: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Related biology news :

1. Nitrous oxide: definitely no laughing matter
2. 1 person out of every 1,000 has synaesthesia, in which an individual can smell a sound
3. The art of using science to inform ecosystem restoration in Puget Sound
4. Deep-sea sharks wired for sound
5. New 3-D ultrasound could improve stroke diagnosis, care
6. Sounding out heart problems automatically
7. If a street tree falls... what does it take to make sound policy?
8. Anti-tumor therapy with endoscopic ultrasound may fight cancer more safely and effectively
9. Bats pick up rustling sounds against highway background noise
10. Alternative to burning: environmentally sound disposal for wood chips
11. Effects of anthropogenic sound on marine mammals -- a research strategy
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:8/25/2014)... PULLMAN, Wash.Five years ago this month, one of the ... the Washington State University campus, striking some 2,000 people. ... trove of data gathered at the time to gain ... launch the virus,s rapid spread across the university community., ... first cases came in to the university,s Health and ...
(Date:8/25/2014)... Researchers at the University of California, San Diego School of ... certain glioblastomas the primary form of a deadly brain ... not in the DNA sequence of the tumor, but in ... a priority report in the journal Oncotarget . ... by sequencing the DNA of the cancer cell," said Clark ...
(Date:8/25/2014)... family of proteins that promotes virus entry into cells ... HIV and other viruses, University of Missouri researchers have ... new insights into our understanding of not only HIV ... said Shan-Lu Liu, M.D., Ph.D., associate professor in the ... Immunology. , The study was recently published in the ...
Breaking Biology News(10 mins):WSU flu outbreak provides rare study material 2WSU flu outbreak provides rare study material 3Finding keys to glioblastoma therapeutic resistance 2MU researchers discover protein's ability to inhibit HIV release 2MU researchers discover protein's ability to inhibit HIV release 3
... shines a blue light on yeast and mammalian cells in her ... The effect is the result of a light-activated switch from a ... use this novel "on-off switch" to control cell growth or death, ... cells, said Tucker, an assistant research professor in the biology department ...
... The ocean surface is 30 percent more acidic today than it ... 50 years - a rising trend that could both harm coral ... the ocean food web, scientists warn. Despite the seriousness of ... deploy a complete suite of available tools to monitor rising acidification ...
... have found new evidence linking "Snowball Earth" glacial events to ... the National Science Foundation (NSF). Study results appear in ... The controversial Snowball Earth hypothesis posits that, on several occasions, ... thick sheet of ice lasting for millions of years. ...
Cached Biology News:Researchers could use plant's light switch to control cells 2Speed installation of system to monitor vital signs of global ocean, scientists urge 2Speed installation of system to monitor vital signs of global ocean, scientists urge 3Speed installation of system to monitor vital signs of global ocean, scientists urge 4Speed installation of system to monitor vital signs of global ocean, scientists urge 5Speed installation of system to monitor vital signs of global ocean, scientists urge 6Speed installation of system to monitor vital signs of global ocean, scientists urge 7Speed installation of system to monitor vital signs of global ocean, scientists urge 8Animal evolution springs from 'Snowball Earth' 2
(Date:8/26/2014)... , Aug. 26, 2014 An analysis by ... of all Dengue virus strains in Pubmed, has revealed ... to 1944. This conservation and sharing of specific Replikin ... Dengue Blocker-Vaccine™ candidate, as it did for the H5N1 ... of which have been found to be effective (1,2). ...
(Date:8/26/2014)... 26, 2014   Lycera Corp ., a ... medicines to treat autoimmune disease and cancer based ... the appointment of Harinder Singh , Ph.D., ... Dr. Singh will lead the board,s efforts to ... ongoing research programs and pipeline of therapies targeting ...
(Date:8/26/2014)... The global market for molecular diagnostics ... according to a new study by Grand View Research, ... the subsequent introduction of advanced cancer diagnostic technologies are ... the next six years. Moreover, the growing global base ... coupled with disease triggering lifestyle habits such as smoking ...
(Date:8/26/2014)... Switzerland (PRWEB) August 26, 2014 ... for drug discovery and life science research, today ... Meetings will be held in Asia, Europe, ... from global pharmaceutical companies and leading research organizations ... share best practices, case studies, and upcoming challenges ...
Breaking Biology Technology:Lycera Appoints Harinder Singh, Ph.D., as Chair of Scientific Advisory Board 2Lycera Appoints Harinder Singh, Ph.D., as Chair of Scientific Advisory Board 3World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 2World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 3World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 4World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 5World Molecular Diagnostics Market Is Expected To Grow To $8,020.1 Million From 2014 To 2020: Grand View Research, Inc 6Thought Leaders to Explore Innovations in SPR & Combination Screening at Genedata Screener User Group Meetings 2Thought Leaders to Explore Innovations in SPR & Combination Screening at Genedata Screener User Group Meetings 3
... , NEW YORK , July 27 ... announced the completion of a $5 million round ... Alleghany Corporation (N Y SE: Y), and other investors. ... leading position in the global online patent validation sector by ...
... /PRNewswire-FirstCall/ - Oncothyreon Inc. (Nasdaq: ONTY ) will conduct a conference call ... 2010 at 4:30 p.m. Eastern time ( 1:30 p.m. Pacific ... To participate in the ... 287-9361 (International). In addition, the call will be webcast live and can be ...
... physicists and materials scientists at the University of ... to rapidly grow centimeter-scale membranes of binary nanocrystal ... nanocrystals on a liquid surface. The study ... long-range-ordered BNSL membranes with rigorous control of nanocrystal ...
Cached Biology Technology:Article One Announces Completion of Funding from Alleghany Corporation 2Article One Announces Completion of Funding from Alleghany Corporation 3Penn collaboration leads to simpler method for building varieties of nanocrystal superlattices 2Penn collaboration leads to simpler method for building varieties of nanocrystal superlattices 3
...
Phospho-Btk (Tyr223) Antibody...
...
... to Ki67 - Proliferation Marker, prediluted ... related nuclear protein, expressed by proliferating cells ... cycle (G1, S, G2 and M phase). ... Ki67 antibodies are useful in establishing the ...
Biology Products: