Zobrazeno 1 - 9
of 9
pro vyhledávání: '"D. K. Cullers"'
Autor:
D. K. Cullers, Richard P. Stauduhar
Publikováno v:
International Astronomical Union Colloquium. 161:645-651
Effective detection of extraterrestrial radio signals requires elimination of terrestrial interference. However, the sensitivity of standard, two element interferometry, depends on the geometric mean of the antenna areas. This is very disadvantageous
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7cab15ac2531630c5499c8dd3df2abb
https://doi.org/10.1017/s0252921100015189
https://doi.org/10.1017/s0252921100015189
Publikováno v:
IEEE Transactions on Medical Imaging. 16:503-515
A multiresolution statistical method for identifying clinically normal tissue in digitized mammograms is used to construct an algorithm for separating normal regions from potentially abnormal regions; that is, small regions that may contain isolated
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b921cc563600d94617de5e1af86c6c84
https://doi.org/10.1109/42.640740
https://doi.org/10.1109/42.640740
Autor:
John W. Dreher, D. K. Cullers
Publikováno v:
International Astronomical Union Colloquium. 161:711-717
We develop a figure of merit for SETI observations which is anexplicitfunction of the EIRP of the transmitters, which allows us to treat sky surveys and targeted searches on the same footing. For each EIRP, we calculate the product of terms measuring
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::139143eac56ab35dcacb73b6eab51da9
https://doi.org/10.1017/s0252921100015293
https://doi.org/10.1017/s0252921100015293
Autor:
E. W. Dunham, J. D. Rose, D. K. Cullers, William D. Cochran, A. F. Granados, Jon M. Jenkins, William J. Borucki, David G. Koch
Publikováno v:
Astrophysics and Space Science. 241:111-134
FRESIP (FRequency of Earth-Sized Inner Planets) is a mission designed to detect and characterize Earth-sizes planets around solar-like stars. The sizes of the planets are determined from the decrease in light from a star that occurs during planetary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a49ae2a2d0b6458257bbf84e6c5a0484
https://doi.org/10.1007/bf00644220
https://doi.org/10.1007/bf00644220
Autor:
D K, Cullers
Publikováno v:
Electroencephalography and clinical neurophysiology. Supplement. 45
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::59920d7deb1868407a895066ab7aef89
https://pubmed.ncbi.nlm.nih.gov/8930519
https://pubmed.ncbi.nlm.nih.gov/8930519
Autor:
D. K. Cullers
Publikováno v:
SPIE Proceedings.
Electromagnetic SETI searches since 1960 have used a variety of search strategies. They have sampled 22 octaves in frequency with widely different sensitivities and sky coverages. Searches used a variety of detection bandwidths and data processing te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa19daaee835519fbb6a07b0abd3f43a
https://doi.org/10.1117/12.150120
https://doi.org/10.1117/12.150120
Autor:
D. K. Cullers
Publikováno v:
Acta Astronautica. 13:31-37
Highly monochromatic signals, such as TV carriers, can be detected sensitively by using a narrow filter (b < or = 1 Hz) and performing power accumulation on its output. If instead a low-duty-cycle pulsed signal of the same total energy is present, th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca87a0457ef82e43a867c32d240d1dd3
https://doi.org/10.1016/0094-5765(86)90005-6
https://doi.org/10.1016/0094-5765(86)90005-6
Autor:
D. K. Cullers
Publikováno v:
The Search for Extraterrestrial Life: Recent Developments ISBN: 9789027721143
The NASA Multichannel Spectrum Analyzer (MCSA) supplies data in several formats and in a wide range of frequency resolutions. To decide if an extraterrestrial signal is present, this data is searched using detection algorithms particularly sensitive
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::644b239945e22127a7773ace80f942e7
https://doi.org/10.1007/978-94-009-5462-5_48
https://doi.org/10.1007/978-94-009-5462-5_48
Autor:
D. K. Cullers
Publikováno v:
Astrophysics and Space Science Library ISBN: 9789401078306
SETI searches for structured artificial signals. In a pragmatic sense, this means signals which are concentrated in frequency, time, or both (Cullers, et al. 1985). NASA’s SETI efforts are directed toward the detection of sinusoidal carriers and pu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4e60ee323c12a5adc654dae64f6878c
https://doi.org/10.1007/978-94-009-2959-3_54
https://doi.org/10.1007/978-94-009-2959-3_54