Navigation Links
Electromagnetic phantom exorcises specters of metal detector tests
Date:12/23/2008

In the comics, the Phantom is a masked crimefighter who protected the innocent from pirates, hijackers and other evildoers. While not as dashing or exciting as its costumed namesake, this electromagnetic phantoma carbon and polymer mixture that simulates the human bodyis being readied by the National Institute of Standards and Technology (NIST) for its upcoming role as a different kind of protector. The NIST phantom serves as a mannequin in a standardized performance test for walk-through metal detectors or WTMDs such as those used at airports.

Metal detectors currently are evaluated by using clean testers (human subjects) who walk through the detector adorned with different types of innocuous metal objects, such as eyeglasses, belt buckles, watches, jewelry and coins, or by a piece of plywood pushed through the metal detector with the same items mounted on it. The disadvantage of using human subjects is that person-to-person variability in physical makeup and walking style and changes in a particular persons gait or position at each pass makes standardization impossible. The second method is reproducible, but it cant tell evaluators how a human body may impact the WTMDs ability to discriminate between weapons and innocuous objects.

The solution for both problems came from the lab. With funding from the U.S. Department of Justices National Institute of Justice (NIJ), researchers in NISTs Electromagnetics Division mixed a polymer with carbon blacka fine powder made almost entirely of elemental carbonto yield a low-cost, easily molded compound that can mimic the average electrical conductivity of the human body (which includes blood, bone, fat, organs, muscle and skin). The material is shaped into brick-like blocks and then arranged on a non-conductive fiberglass frame in a form that simulates the mass and height of the average American adult male.

Once assembled, the NIST phantom is placed atop a low-friction nonmetallic cart and passed through a WTMD at a speed of 0.5 meters per second by a computer-controlled actuator. This speed was selected because it is a common walking pace for an adult male. Engineers in NISTs Office of Law Enforcement Standards used the data from recent trials to design and support a reproducible process incorporating the phantom that will evaluate a walk-through metal detectors ability to discriminate between threatening and non-threatening objects, such as the simulated eyeglasses or belt buckle. Plans call for the testing protocol to be considered in a future revision of the NIJ standard on metal detector performance.


'/>"/>

Contact: Michael E. Newman
michael.newman@nist.gov
301-975-3025
National Institute of Standards and Technology (NIST)
Source:Eurekalert  

Related biology news :

1. From sheet metal elements to host cells: DFG launches 10 new collaborative research centers
2. Bare bones of crystal growth: Biomolecules enhance metal contents in calcite
3. Paradigm Tactical Products to be Largest Distributor of Metal/Radiation Detection Wands in United States
4. Heavy metal link to mutations, low growth and fertility among crustaceans in Sydney Harbor tributary
5. Can certain metals repel sharks from fishing gear?
6. Heavy metals in the Peak District -- evidence from bugs in blanket bogs
7. UDs Bobev receives NSF Early Career Award for research on novel compounds of rare Earth metals
8. Metal foam has a good memory
9. Scientists develop a fast system to detect metal concentrations in iron and steel industry workers
10. Sensitive nanowire disease detectors made by Yale scientists
11. Queens University Belfast plays leading role in Europe-wide tests for safer food
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Electromagnetic phantom exorcises specters of metal detector tests
(Date:3/29/2017)... the health IT company that operates the largest health ... today announced a Series B investment from BlueCross BlueShield ... investment and acquisition accelerates higi,s strategy to create the ... activities through the collection and workflow integration of ambient ... secures data today on behalf of over 36 million ...
(Date:3/24/2017)... , March 24, 2017 The Controller General of ... Mr. Abdulla Algeen have received the prestigious international IAIR Award ... Continue Reading ... ... and Deputy Controller Abdulla Algeen (small picture on the right) have received ...
(Date:3/23/2017)... Research and Markets has announced the addition of the ... to 2025" report to their offering. ... The Global Vehicle Anti-Theft System Market ... the next decade to reach approximately $14.21 billion by 2025. ... for all the given segments on global as well as regional ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... ... October 11, 2017 , ... Singh Biotechnology today announced ... to SBT-100, its novel anti-STAT3 (Signal Transducer and Activator of Transcription 3) B ... to cross the cell membrane and bind intracellular STAT3 and inhibit its function. ...
(Date:10/10/2017)... ... 2017 , ... Dr. Bob Harman, founder and CEO of VetStem Biopharma, ... The event entitled “Stem Cells and Their Regenerative Powers,” was held on ... DVM, MPVM was joined by two human doctors: Peter B. Hanson, M.D., Chief of ...
(Date:10/10/2017)... ... October 10, 2017 , ... The ... prestigious awards honoring scientists who have made outstanding contributions to analytical ... during Pittcon 2018, the world’s leading conference and exposition for laboratory science, which ...
(Date:10/9/2017)... (PRWEB) , ... October 09, 2017 , ... ... a four-tiered line of medical marijuana products targeting the needs of consumers who ... packaging of Kindred takes place in Phoenix, Arizona. , As operators of two ...
Breaking Biology Technology: