Results 51 to 60 of about 291,546 (259)

Radial velocities of southern stars obtained with the photoelectric scanner coravel, VIII. Observations of 471 giant stars in omega centauri.

, 1997
This paper presents a catalog 3 of the mean radial velocities of 471 giant stars in the galactic globular cluster ! Centauri, the large majority of which are connrmed as cluster members. The typical uncertainty in the mean velocities is less than 1 km s ?
M. Mayor, G. Meylan, S. Udry, A. Duquennoy, J. Andersen, B. Nordström, M. Imbert, E. Maurice, L. Prévot, A. Ardeberg, H. Lindgren   +10 more
semanticscholar   +1 more source

An updated MILES stellar library and stellar population models [PDF]

, 2011
Aims: We present a number of improvements to the MILES library and stellar population models. We correct some small errors in the radial velocities of the stars, measure the spectral resolution of the library and models more accurately, and give a better
J. Falcón-Barroso, J. Falcón-Barroso, P. Sánchez-Blázquez, A. Vazdekis, A. Vazdekis, E. Ricciardelli, E. Ricciardelli, N. Cardiel, A. Cenarro, J. Gorgas, R. Peletier   +10 more
semanticscholar   +1 more source

Beam model development and clinical experience with RadCalc for treatment plan quality assurance in online adaptive workflow with an MR‐linac

Journal of Applied Clinical Medical Physics, EarlyView.
Abstract Purpose The aim of this work was to report on the optimization, commissioning, and validation of a beam model using a commercial independent dose verification software RadCalc version 7.2 (Lifeline Software Inc, Tyler, TX, USA), along with 4 years of experience employing RadCalc for offline and online monitor unit (MU) verification on the ...
Urszula Jelen, Zoë Moutrie, Jack D Aylward, Michael G Jameson   +3 more
wiley   +1 more source

Rapid Changes in the Optical Intensity and Radial Velocities of the X-Ray Source SCO X-1

, 1968
The optical flux of Seo X-1 was continuously monitored on five separate nights between April and June 1967. Pulse counting was used with sampling intervals of 5 sec on the 100- and 200-inch telescopes and 15 sec on the 60-inch reflector. The error due to
J. Westphal, A. Sandage, J. Kristian
semanticscholar   +1 more source

Signals embedded in the radial velocity noise [PDF]

, 2013
Bayesian data analysis techniques, together with suitable statistical models, can be used to obtain much more information from noisy data than the traditional frequentist methods.
M. Tuomi
semanticscholar   +1 more source

Data‐driven forecasting of ship motions in waves using machine learning and dynamic mode decomposition

International Journal of Adaptive Control and Signal Processing, EarlyView.
Summary Data‐driven forecasting of ship motions in waves is investigated through feedforward and recurrent neural networks as well as dynamic mode decomposition. The goal is to predict future ship motion variables based on past data collected on the field, using equation‐free approaches.
Matteo Diez, Mauro Gaggero, Andrea Serani   +2 more
wiley   +1 more source

Performance Triggered Adaptive Model Reduction for Soil Moisture Estimation in Precision Irrigation

International Journal of Adaptive Control and Signal Processing, EarlyView.
ABSTRACT Accurate soil moisture information is essential for precise irrigation to enhance water use efficiency. Estimating soil moisture based on limited soil moisture sensors is especially critical for obtaining comprehensive soil moisture information when dealing with large‐scale agricultural fields.
Sarupa Debnath, Bernard Twum Agyeman, Soumya Ranjan Sahoo, Xunyuan Yin, Jinfeng Liu   +4 more
wiley   +1 more source

Laser frequency comb techniques for precise astronomical spectroscopy [PDF]

, 2012
Precise astronomical spectroscopic analyses routinely assume that individual pixels in charge-coupled devices (CCDs) have uniform sensitivity to photons. Intra-pixel sensitivity (IPS) vari-ations may already cause small systematic errors in, for example,
M. Murphy, C. Locke, P. Light, A. Luiten, J. Z. C. I. O. Technology, U. O. S. Australia, Australian Astronomical Observatory, M. University   +7 more
semanticscholar   +1 more source

Neural Network Adaptive Control With Long Short‐Term Memory

International Journal of Adaptive Control and Signal Processing, EarlyView.
ABSTRACT In this study, we propose a novel adaptive control architecture that provides dramatically better transient response performance compared to conventional adaptive control methods. This is accomplished by the synergistic employment of a traditional adaptive neural network (ANN) controller and a long short‐term memory (LSTM) network.
Emirhan Inanc, Abdullah Habboush, Yigit Gurses, Yildiray Yildiz, Anuradha M. Annaswamy   +4 more
wiley   +1 more source

Radial velocities of planetary nebulae

, 1983
On presente un catalogue de toutes les vitesses radiales connues et de leurs incertitudes pour 524 nebuleuses planetaires. Cent deux sources ont ete consultees, comprenant 920 mesures de vitesse distinctes.
S. Schneider, Y. Terzian, A. Purgathofer, M. Perinotto   +3 more
semanticscholar   +1 more source