Results 141 to 150 of about 1,806 (190)

A process inspired by fractals for embedding digital codes into additively manufactured components for supply chain security. [PDF]

Sci Rep
Nemati S, Mahmoudi A, Ham K, Siemers T, Guo S, Gutekunst J, Schulz J, Taylor I, Maasberg M, Butler LG.   +9 more
europepmc   +1 more source

Loss of Nuclear Profilin 1 Triggers Oncogenic Reprogramming of Mammary Epithelial Cells Through Dysregulated DNA Replication in Breast Cancer. [PDF]

J Breast Cancer
Zhao Z, Huang Y, Mai J, Cao F, Fang Q, Wu D, Li Z, Liu X.   +7 more
europepmc   +1 more source

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Precision Geodesy via Radio Interferometry

Science, 1972
Very-long-baseline interferometry experiments, involving observations of extragalactic radio sources, were performed in 1969 to determine the vector separations between antenna sites in Massachusetts and West Virginia. The 845.130-kilometer baseline was estimated from two separate experiments.
H F, Hinteregger, I I, Shapiro, D S, Robertson, C A, Knight, R A, Ergas, A R, Whitney, A E, Rogers, J M, Moran, T A, Clark, B F, Burke   +9 more
openaire   +2 more sources

Radio-frequency low-coherence interferometry

Optics Letters, 2014
A method for retrieving low-coherence interferograms, based on the use of a microwave photonics filter, is proposed and demonstrated. The method is equivalent to the double-interferometer technique, with the scanning interferometer replaced by an analog fiber-optics link and the visibility recorded as the amplitude of its radio-frequency (RF) response.
Carlos R, Fernández-Pousa, José, Mora, Haroldo, Maestre, Pablo, Corral   +3 more
openaire   +2 more sources

Radio interferometry

Reviews of Geophysics, 1987
The potential of Very Long Baseline Interferometry (VLBI) to provide important new geodetic, geophysical, and astrometric information has long been recognized, and the past four years have seen a realization of that potential. VLBI measurements have been used to determine the sizes, shapes, rotations, flexures and tectonic deformations of networks of ...
openaire   +1 more source

Radio interferometry

Reviews of Geophysics, 1983
In the previous Quadrennial Report, Clark [1979c] concluded that, after slightly more than one decade of development and refinement, the technique of Very Long Baseline Interferometry (VLBI) had “come of age.” However, by the close of 1978, only the most tentative first steps had been taken by the geodetic community toward the deployment and operation ...
openaire   +1 more source

Precision Surveying Using Radio Interferometry

Journal of the Surveying and Mapping Division, 1978
The application of Very long baseline Interferometry (VLBI) to surveying is reviewed. An examination of the error budget for the VLBI observing system in use by the GSFC/HO/MIT VLBI team is presented, and methods for decreasing the effects of the various errors sources are reviewed. Results from recent VLBI experiments are presented. These results show
James W. Ryan, Jill J. Wittels, Alan R. Whitney, Irwin I. Shapiro, Alan E.E. Rogers, Douglas S. Robertson, Chopo Ma, Curtis A. Knight, Hans F. Hinteregger, Charles C. Counselman, William D. Cotton, Brian E. Corey, Robert Coates, Thomas A. Clark   +13 more
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Compressed sensing and radio interferometry

2015 23rd European Signal Processing Conference (EUSIPCO), 2015
Radio interferometric imaging constitutes a strong ill-posed inverse problem. In addition, the next generation radio telescopes, such as the Low Frequency Array (LOFAR) and the Square Kilometre Array (SKA), come with an additional direction-dependent effects which impacts the image restoration.
Jiang, M., Girard, J. N., Starck, J.-L., Corbel, S., Tasse, C.   +4 more
openaire   +1 more source

Radio Interferometry From Space Platforms

SPIE Proceedings, 1984
While current VLBI observations are limited in their resolution by the earth diameter magnitude, which is the largest antenna separation available, as well as in their information content, because of the small number of antennas in use at a given time, the extension of VLBI to include one or more antennas in space will relieve both constraints and help
D. H. Roberts, S. H. Morgan, B. F. Burke, J. F. Jordan, R. A. Preston, E. C. Hamilton   +5 more
openaire   +1 more source