507 research outputs found
History of the Town of Cumberland, Maine
https://digitalmaine.com/cumberland_books/1009/thumbnail.jp
Ambiguity-Avoidance: A Universal Constraint Extraction from NP Sequences
Proceedings of the 3rd Annual Meeting of the Berkeley Linguistics
Society (1977), pp. 440-45
Metaphorical Models of Thought and Speech: A Comparison of Historical Directions and Metaphorical Mappings in the Two Domains
Proceedings of the Thirteenth Annual Meeting of the Berkeley Linguistics
Society (1987), pp. 446-45
Grammaticalization and Semantic Bleaching
Proceedings of the Fourteenth Annual Meeting of the Berkeley Linguistics
Society (1988), pp. 389-40
Early Welsh Metrics and the Indo-European Poetic Tradition
Proceedings of the Eleventh Annual Meeting of the Berkeley Linguistics
Society (1985), pp. 505-51
Root and Epistemic Modals: Causality in Two Worlds
Proceedings of the Eighth Annual Meeting of the Berkeley Linguistics
Society (1982
Demonstration of the Zero-Crossing Phasemeter with a LISA Test-bed Interferometer
The Laser Interferometer Space Antenna (LISA) is being designed to detect and
study in detail gravitational waves from sources throughout the Universe such
as massive black hole binaries. The conceptual formulation of the LISA
space-borne gravitational wave detector is now well developed. The
interferometric measurements between the sciencecraft remain one of the most
important technological and scientific design areas for the mission.
Our work has concentrated on developing the interferometric technologies to
create a LISA-like optical signal and to measure the phase of that signal using
commercially available instruments. One of the most important goals of this
research is to demonstrate the LISA phase timing and phase reconstruction for a
LISA-like fringe signal, in the case of a high fringe rate and a low signal
level. We present current results of a test-bed interferometer designed to
produce an optical LISA-like fringe signal previously discussed in the
literature.Comment: find minor corrections in the CQG versio
Effects of Interplanetary Dust on the LISA drag-free Constellation
The analysis of non-radiative sources of static or time-dependent
gravitational fields in the Solar System is crucial to accurately estimate the
free-fall orbits of the LISA space mission. In particular, we take into account
the gravitational effects of Interplanetary Dust (ID) on the spacecraft
trajectories. The perturbing gravitational field has been calculated for some
ID density distributions that fit the observed zodiacal light. Then we
integrated the Gauss planetary equations to get the deviations from the LISA
keplerian orbits around the Sun. This analysis can be eventually extended to
Local Dark Matter (LDM), as gravitational fields are expected to be similar for
ID and LDM distributions. Under some strong assumptions on the displacement
noise at very low frequency, the Doppler data collected during the whole LISA
mission could provide upper limits on ID and LDM densities.Comment: 11 pages, 6 figures, to be published on the special issue of
"Celestial Mechanics and Dynamical Astronomy" on the CELMEC V conferenc
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