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pro vyhledávání: '"C. T. Cunningham"'
This report summarizes the most important results of our effort to develop a new class of infrared spectrometers based on a novel broadband heterodyne design. Our results indicate that this approach could lead to a near-room temperature operation wit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5842d610bc5556ee276fa88a1e9788f0
https://doi.org/10.2172/1018797
https://doi.org/10.2172/1018797
Publikováno v:
International Journal of Infrared and Millimeter Waves. 13:659-667
The comparison of a 240 GHz SIS heterodyne receiver with a Schottky diode receiver at the Maxwell telescope revealed difficulties with its calibration using continuum loads. The difficulties arise from the fact that the local oscillator power is not
Publikováno v:
International Journal of Infrared and Millimeter Waves. 13:647-658
We describe the design and performance of a 210–280 GHz SIS heterodyne receiver built for use on the Maxwell Telescope. The mixer utilises a lead alloy SIS tunnel junction, mounted in 4∶1 reduced height rectangular waveguide, and is tuned with a
This report presents a general approach to inferring transmission and source relationships among microbial isolates from their genetic sequences. The outbreak transmission graph (also called the transmission tree or transmission network) is the funda
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5209b12fe5e9a5ac09409daaf21a09ef
https://doi.org/10.2172/959066
https://doi.org/10.2172/959066
Publikováno v:
Lecture Notes in Physics ISBN: 9783540604822
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::209000d57b50330c04695f36f39b276a
https://doi.org/10.1007/bfb0102187
https://doi.org/10.1007/bfb0102187
We present the first high-resolution study of the disk-halo interface in an edge-on galaxy (NGC 5775) in which every component of the interstellar medium is represented and resolved. New single-dish CO J=2-1 and CO J=1-0 data, ROSAT X-ray data, and H
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8be0b5555f014f0729f94ea4b44665f3
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401043410
We describe an heterodyne mixer designed to be used at frequencies around 690 GHz. The active component is an SIS junction based on a lead-bismuth superconducting alloy. The receiver’s best result to date is a system double sideband noise temperatu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::05bb74d2ebe6029aecf601df625ce85e
https://doi.org/10.1007/978-94-011-0794-5_125
https://doi.org/10.1007/978-94-011-0794-5_125
Publikováno v:
Submillimetre Astronomy ISBN: 9789401568524
A 220–280 GHz prototype SIS receiver system is currently being constructed, which will be tested on the JCMT in January 1989. The prototype receiver will act as a test-bed for developing a dualchannel common-user SIS receiver for the JCMT, tunable
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8eb0d2c11c7abebe1207c08e22ee07e
https://doi.org/10.1007/978-94-015-6850-0_27
https://doi.org/10.1007/978-94-015-6850-0_27
Autor:
C. T. Cunningham, J. D. Wade, R. H. Hayward, J. M. McLeod, M. B. Bell, P. A. Feldman, L. W. Avery, H. E. Matthews
Publikováno v:
The Astrophysical Journal. 426:737
Autor:
C. T. Cunningham
Publikováno v:
Physical Review D. 12:323-328
To observers inside and near a Schwarzschild black hole, the external universe appears visually distorted and frequency-shifted due to gravitational focusing, gravitational blue-shifts, Doppler shifts, and aberration. This paper calculates the distor