Results 201 to 210 of about 5,231 (255)

Surface Energy Modulated Self‐Assembly of Percolative Gallium Nanodroplet Films for Stretchable Electronics

open access: yesAdvanced Electronic Materials, EarlyView.
Surface‐energy guided self‐assembly of liquid metals enables the transformation of liquid metal micro/nanodroplets into continuous perocolative films on elastomeric substrates. By tailoring interfacial energetics and wetting behavior, uniform, conductive, and stretchable films are achieved, offering scalable pathways for high‐performance soft ...
Alwar Samy Ramasamy   +7 more
wiley   +1 more source

Spatial Ambiguity Correction in Coherence-Based Average Sound Speed Estimation. [PDF]

open access: yesIEEE Trans Ultrason Ferroelectr Freq Control
Ahmed R, Trahey GE.
europepmc   +1 more source

Optimizing healthcare in space: the role of ultrasound imaging in medical conditions. [PDF]

open access: yesJ Ultrasound
Pirri C   +5 more
europepmc   +1 more source
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Rail weld inspection using phased array ultrasonics

AIP Conference Proceedings, 2013
Inspection of rail welds has always been a challenge to the Railways. The conventional ultrasonic methods which are employed now for the detection of defects are not found to be good enough for defects that exist in different parts of the weld. Phased Array Ultrasonics which performs sectorial scanning could be used effectively for detection of defects
Krishnan Balasubramaniam
exaly   +2 more sources

Ultrasonic phased array systems

The Journal of the Acoustical Society of America, 1980
Ultrasonic phased array method and apparatus for the static or dynamic investigation of structures, such as organs of the body, or intra-uterine detail, wherein ultrasonic echo pulses, reflected back from a testpiece to one or a group of adjacent transducers of a linear transducer array, are converted to corresponding electric signals which are then ...
James M. S. Hutchison, Robert D. Selbie
openaire   +1 more source

Quantitative ultrasonic phased array imaging

AIP Conference Proceedings, 2014
When imaging with ultrasonic phased arrays, what do we actually image? What quantitative information is contained in the image? Ad-hoc delay-and-sum methods such as the synthetic aperture focusing technique (SAFT) and the total focusing method (TFM) fail to answer these questions.
Brady J. Engle   +2 more
openaire   +1 more source

Ultrasonic phased array controller for hyperthermia applications

Ultrasonics, 1991
Multiple and mechanically scanned ultrasound transducer systems have demonstrated the efficacy of using ultrasound to produce deep localized hyperthermia. The use of ultrasonic phased arrays has been proposed as an alternative to these systems. A phased array offers a more flexible approach to heating tumours in that the size, shape, and position of ...
P J, Benkeser, T L, Pao, Y J, Yoon
openaire   +3 more sources

Ultrasonic phased arrays for nondestructive testing

NDT International, 1987
Abstract Although ultrasonic phased arrays are potentially ideally suited to many applications in NDT, their use in practice is limited by the complexity of array probe manufacture and the bulk and cost of the associated electronic control instrumentation.
A. McNab, M.J. Campbell
openaire   +2 more sources

Pressure Vessels Inspections Using Ultrasonic Phased Arrays

Ultrasonic Nondestructive Evaluation for Material Science and Industries, 2003
Phased arrays offer significant technical advantages for weld inspections over conventional ultrasonics. The phased array beams can be steered, scanned, swept and focused electronically. Beam steering permits the selected beam angles to be optimized ultrasonically by orienting them perpendicular to the predicted defects, especially Lack of Fusion ...
M.D.C. Moles, F. Jacques, N. Dube
openaire   +1 more source

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