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pro vyhledávání: '"Robert K. Zimmerman"'
Autor:
Robert K. Zimmerman
Publikováno v:
Modern Physics Letters B. 25:649-662
Experimental tests using a TM 01 mode circular waveguide verify the Aharonov–Bohm effect at L-band frequencies. Additional tests on a free-space range verify longitudinal vector potential wave propagation across 1.5 meters out to a range of 25 mete
Autor:
Franklin Robinson, Kiara Beltran, Stephen Seufert, Paul James, Tamilola Fatoyinbo, Rafael Rincon, Michael Triesky, Nicholas Spartana, Paul Fon, Martin Perrine, Robert K. Zimmerman
In its Carbon Cycle research efforts, prioritized by the National Science Foundation Decadal Survey and mandated by the US Congress, NASA is developing an airborne P-band Ecological Synthetic Aperture Radar called EcoSAR. By using polarimetric and in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bd1dd570b142148ee23de617fe3e826e
https://zenodo.org/record/1264994
https://zenodo.org/record/1264994
Autor:
Robert K. Zimmerman
Publikováno v:
Journal of Applied Physics. 114:044907
To help resolve the long-running debate between physicists and engineers regarding the existence of the magnetic vector potential, herewith we describe an experiment demonstrating reception of time-harmonic vector potential radiation at 1.3 GHz.
Autor:
David J. Copeland, Robert K. Zimmerman
Publikováno v:
SPIE Proceedings.
A laser diode current driver has been developed for free space laser communications. The driver provides 300 mA peak modulation current and exhibits an optical risetime of less than 400 ps. The current and optical pulses are well behaved and show min
Publikováno v:
SPIE Proceedings.
A laser diode beam combiner employing diffraction gratings has been fabricated and tested. The Grating Laser Beam Combiner (GLBC) uses two holographic diffraction gratings to incoherently combine the first order diffraction components of four 35 mW A
Publikováno v:
The Journal of Chemical Physics. 65:619-622
The algorithm of Clinton et al. [Phys. Rev. 177, 7 (1969)] for the direct determination of an idempotent density matrix from one‐electron expectation values is adapted to perform energy‐variational calculations in which the expectation values ser
Autor:
Robert K. Zimmerman
Publikováno v:
SPIE Proceedings.
NASA Goddard is developing a free-space laser communication transmitter. Each of the 10 GaAlAs diode lasers in the transmitter must be digitally modulated by individual current drivers from a common data source. In order to fit the miniature laser he
Conference
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