Zobrazeno 1 - 10
of 93
pro vyhledávání: '"J. M. BARKER"'
Publikováno v:
IEEE Transactions on Microwave Theory and Techniques. :1-12
Publikováno v:
IEEE Microwave Magazine. 22:64-77
The widespread offering of online engineering classes has not been without its share of controversy [1] – [7] . There are those who question the pedagogic quality of courses made freely available through video-sharing platforms like YouTube, which
Publikováno v:
2021 International Conference on Electromagnetics in Advanced Applications (ICEAA).
It has been shown that the cutoff frequency of a PEC circular waveguide can be significantly reduced by inserting a relatively thin epsilon-negative and near-zero (ENNZ) metamaterial (MTM) liner inside the bore of a waveguide [1] , [2] . This reducti
Autor:
C. J. M. Barker, A. K. Iyer
Publikováno v:
2020 Fourteenth International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials).
A relation between a metamaterial (MTM) liner for a circular waveguide and its equivalent surface impedance is made to allow for the replacement of the MTM liner with a metasurface (MTS). The equivalent surface impedance is found over a frequency ran
Autor:
J M, Barker
Publikováno v:
Postgraduate medicine. 78(1)
Since his report on last year's meeting of the American College of Cardiology in Dallas was so well received, we asked Dr James M. Barker to attend this year's meeting, held in Anaheim, California, and again give us a primary care physician's perspec
Publikováno v:
INFOCOM
Compromised machines are one of the key security threats on the Internet; they are often used to launch various security attacks such as spamming and spreading malware, DDoS, and identity theft. Given that spamming provides a key economic incentive f
Autor:
J. M. Barker, Felicia C. Goldstein, David W. Wright, Jonathan J. Ratcliff, Michelle C. LaPlaca, J. Ockerman
Publikováno v:
Journal of Medical Engineering & Technology. 31:161-169
Undiagnosed mild traumatic brain injury (mTBI) often leads to poor patient management and significant morbidity. The lack of an efficient screening tool is especially apparent in the athletic setting, where repetitive injuries can lead to prolonged d
Publikováno v:
Journal of Physics: Condensed Matter. 17:1679-1686
We report the observation of a velocity overshoot phenomenon for electrons as well as holes in a GaAs-based p–i–n nanostructure by using transient picosecond Raman spectroscopy. Under the picosecond laser excitation, we have found that the extent
Autor:
J. M. Barker, R. L. Henry, Stephen M. Goodnick, Alma Wickenden, David K. Ferry, Daniel D. Koleske
Publikováno v:
Microelectronic Engineering. 63:193-197
AlGaN/GaN test structures, with an etched constriction have been fabricated and tested with, and without, a gate. A pulsed voltage input with a 200 ns pulse width and a four-point measurement were used in a 50 Ω environment to determine the room tem