منابع مشابه
Long-Term Stability of the NIST Conical Reference Transducer
The National Institute of Standards and Technology (NIST) Conical Reference Transducer (CRT) is designed for purposes requiring frequency response characteristics much more uniform than those attainable with ultrasonic transducers conventionally used for acoustic emission (AE) nondestructive testing. The high performance of the CRT results from the use of design elements radically different fro...
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Experimental studies of capillary-dominated displacements in variable-aperture fractures have demonstrated the occurrence of a satiated state at the end of invasion, where significant entrapment of the displaced phase occurs. The structure of this entrapped phase controls the behavior of flow and transport processes in the flowing phase. Recent studies have shown that the areal saturation of th...
متن کاملOptical switch based on variable aperture.
We report on a pixel whose aperture can be varied electrically. The pixel is confined by a hole-patterned polymer wall and a dielectric liquid forms a ring shape around the wall surface. Without an electric field, the pixel has the largest aperture. The applied fringing field stretches the liquid surface, leading to a decrease in the aperture size. The switchable aperture ratio of the pixel is ...
متن کاملRadiation from Circular Waveguide Aperture Fields Using Complex Conical Wave Objects
This paper demonstrates the application of a new kind of conical wave-objects to the computation of fields radiated by circular apertures. The radiation integral is transformed into a summation of complex wave-objects by means of the Fourier series expansion and Generalized Pencil of Functions (GPoF) method, which reduce the starting integral to a form that can be evaluated in a closed form. Th...
متن کاملVariable Numerical-Aperture Temporal-Coherence Measurement of Resonant-Cavity LEDs
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ژورنال
عنوان ژورنال: Journal of the Acoustical Society of Japan (E)
سال: 1988
ISSN: 0388-2861,2185-3509
DOI: 10.1250/ast.9.211