GRAMS Opportunities Fall 2013

determinedenchiladaΠολεοδομικά Έργα

25 Νοε 2013 (πριν από 2 χρόνια και 11 μήνες)

47 εμφανίσεις

GRAMS Opportunities

Fall 2013

Advanced Signal Processing with Application to Nondestructive Evaluation

A multitude of concrete
based structures
constitutes our nation’s aging infrastructure
including nuclear power plants.
Unlike most metallic
materials, reinforced concrete is a
nonhomogeneous material comprised of, a composite with low
density matrix, a mixture of
cement, sand, aggregate and water, and a high
density reinforcement (typically 5% in NPP
containment structures), made up of steel r
ebar or tendons.

Concrete structures in nuclear
generating stations are extremely large. For example, the height of an atmospheric cooling
tower is about 400
500 feet; a containment building is nearly 200 feet high. Though this
situation is not unique (
dams, long
span bridges), it poses major difficultie
s in terms
of nondestructive evaluation

(NDE) of these important structures
Current research
activities involve using multiple NDE techniques and advanced signal processing methods
to analyze this

data to perform volumetric imaging on thick
, reinforced concrete sections,
the location of reinforcement members, and the physical and chemical properties of a
concrete structure. Therefore research opportunities under this activity require skills in
tlab and advanced signal processing methods.

Radio Frequency Testing

The Technical Testing and Analysis Center at Oak Ridge National Laboratory performs
radiological, environmental, mechanical, and electromagnetic compatibility/interference
on testing as well as standards based testing.

The electromagnetic
compatibility/interference testing includes Radio Frequency (RF) susceptibility, RF
emissions, conducted disturbances, magnetic field, electrostatic discharge, and surges and
oscillatory w

In particular, the RF susceptibility and emissions testing is performed in
either a semi
anechoic chamber or a gigahertz transverse electromagnetic (GTEM) wave

Both chambers operate from the same set of signal generators and amplifiers that
erform testing from 26 MHz up

to 18 GHz.

A variety of research projects can stem from
these two chambers.

For instance, one could perform a characterization on the GTEM for
modeling purposes that would be used as an aid in placement of equipment within t

Another area of interest is an evaluation of materials or techniques that could be
utilized to reduce RF susceptibility or emissions on radiological detection instrumentation.

Therefore research opportunities under this activity require
s in RF testing.

Physical Uncloneable Functions using Field Programmable Gate Arrays

New protocols for user authentication and key distribution are needed for Smart Grid
applications. The Measurement Science and Systems Engineering Division is researchin
using physical unclonable functions
to implement these new protocols.

PUFs are
physical devices whose random response depends on intrinsic randomness of their
production variability.

Current research activities involve

using field programmable gate


to design/develop scalable cyber security solutions. Therefore research
opportunities under this activity require skills in ISE (Xilinx design and development tools)
and VHDL/Verilog.