Results 221 to 230 of about 2,917 (259)

Control characteristics of the ALMA Nutator

2010 IEEE International Conference on Control Applications, 2010
The control of a 75 centimeter diameter Atacama Large Millimeter/submillimeter Array (ALMA) [1] nutating subreflector, or Nutator, to meet the specifications of 10 millisecond (ms) settle time and 1.3 arc-second pointing error involves tremendous challenges.
Homin Jiang, Ming-Tang Chen, J. C. Han
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Nutational stimulated photon echoes

Optics Letters, 2002
Stimulated photon echoes (SPEs) with time duration comparable to the coherent lifetime and Rabi period have been investigated theoretically and experimentally with an angled beam configuration. The Rabi oscillation effects on both the transmitted field (optical nutation) and the SPE fields are explained by analytic solutions of Maxwell-Bloch equations.
Mingzhen, Tian, Randy, Reibel, Zeb, Barber, W Randall, Babbitt   +3 more
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Link between the retrograde-prograde nutations and nutations in obliquity and longitude

Celestial Mechanics & Dynamical Astronomy, 1995
The nutations of the Earth can be seen as variations in longitude and in obliquity of the position of the Celestial Ephemeris Pole (CEP); these variations are given for each nutation frequency, and correspond to an elliptical motion of the CEP in the inertial space.
P. Defraigne, V. Dehant, P. P�quet
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INITIATION OF NUTATION IN SUNFLOWER HYPOCOTYLS

1981
Publisher Summary This chapter discusses the initiation of nutation in sunflower hypocotyls. If, prior to the onset of nutating activity, one could see random walk type movements by the epicotyl that in time grow large enough to elicit a gravitropic response with overshoot, then one should interpret this as additional support for the validity of ...
A H, Brown, D K, Chapman
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Possible Temporal Variations of the Free Core Nutation and Forced Nutations

1998
The IAU 1980 nutation daily offsets in longitude (δψ) and obliquity (δψ) from VLBI observations are analyzed by wavelet and multistage filter methods. Results suggest that the temporal variations of the free core nutation(FCN) is more intense than those of the annual nutation.
Li Jinling, Zheng Dawei
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Quantification of corrections for the main lunisolar nutation components and analysis of the free core nutation from VLBI-observed nutation residuals

Journal of Geodesy, 2021
Antony Trinh, Ping Zhu, Santiago Triana   +2 more
exaly  

Nutation und Wachstum II

1977
Im ersten Teil dieser Arbeit (Elemente d. N. 25 ) wurde an einer Reihe von Tatsachen dargestellt, dass die organischen Gestalten nicht ruhende, feste Formen Wie z. B. die Kristalle sind, sondern dass sie ihr Dasein einem ständig sich verwirklichenden Geschehen im Strome des Stoffwechsels verdanken.
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nutational, adj.

2023
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Nutation

American Journal of Physics, 1966
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nutation, n.

2023
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