Results 101 to 110 of about 2,565,021 (373)

Model and long-term coherent accumulation basic algorithm for the reflected signal with non-zero higher derivative range to radar target

Doklady Belorusskogo gosudarstvennogo universiteta informatiki i radioèlektroniki, 2021
The purpose of the work was to substantiate a mathematical model of the signal reflected from moving radar target at the time of its observation, which determines the need to take into account the range migration and its derivatives up to the third order,
S. V. Kozlov, Le Van Cuong
doaj   +1 more source

30. Radial Velocities [PDF]

Transactions of the International Astronomical Union, 1970
Les mesures de vitesse radiale (VR) ont été continuées par les trois techniques: prisme objectif, spectrographie à fente, interférométrie, avec des instruments en fonction à l’Observatoire de Haute Provence ainsi qu’à celui de l’ESO.Grand Nuage de Magellan: Le travail de 13 champs est pratiquement achevé et sera publié dès que les mesures de spectres ...
David S. Evans, H. A. Abt, A. H. Batten, A. Blaauw, R. Bouige, A. D. Thackeray   +5 more
openaire   +1 more source

A Gaussian process framework for modelling stellar activity signals in radial velocity data [PDF]

, 2015
To date, the radial velocity (RV) method has been one of the most productive techniques for detecting and confirming extrasolar planetary candidates. Unfortunately, stellar activity can induce RV variations which can drown out or even mimic planetary ...
V. Rajpaul, S. Aigrain, Michael A. Osborne, S. Reece, S. Roberts   +4 more
semanticscholar   +1 more source

Recent Advancements in Bulk Processing of Rare‐Earth‐Free Hard Magnetic Materials and Related Multiscale Simulations

Advanced Engineering Materials, EarlyView.
This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley   +1 more source

Planets around active stars

, 2007
We present the results of radial velocity measurements of two samples of active stars. The first sample contains field G and K giants across the Red Giant Branch, whereas the second sample consists of nearby young stars (d < 150 pc) with ages between 10 -
A.P. Hatzes, A.P. Hatzes, A.P. Hatzes, D. Queloz, G.W. Henry, J. Setiawan, J. Setiawan, J. Setiawan, J. Setiawan, J. Setiawan, S. Frink, S. L da   +11 more
core   +1 more source

THE RADIAL VELOCITY EXPERIMENT (RAVE): FIFTH DATA RELEASE [PDF]

, 2013
Data Release 5 (DR5) of the Radial Velocity Experiment (RAVE) is the fifth data release from a magnitude-limited ( ) survey of stars randomly selected in the Southern Hemisphere. The RAVE medium-resolution spectra ( ) covering the Ca-triplet region (8410–
M. Steinmetz, T. Zwitter, A. Siebert, F. Watson, K. Freeman, U. Munari, R. Campbell, M. Williams, G. Seabroke, R. Wyse, Q. Parker, O. Bienaymé, S. Roeser, B. Gibson, G. Gilmore, E. Grebel, A. Helmi, J. Navarro, D. Burton, C. Cass, J. Dawe, K. Fiegert, M. Hartley, K. Russell, W. Saunders, H. Enke, J. Bailin, J. Binney, J. Bland-Hawthorn, C. Boeche, W. Dehnen, D. Eisenstein, N. Evans, M. Fiorucci, J. Fulbright, O. Gerhard, U. Jauregi, A. Kelz, L. Mijović, I. Minchev, G. Parmentier, J. Peñarrubia, A. Quillen, M. Read, G. Ruchti, R. Scholz, A. Siviero, M. Smith, R. Sordo, L. Veltz, S. Vidrih, R. V. Berlepsch, B. Boyle, E. Schilbach   +53 more
semanticscholar   +1 more source

Hybrid Auxetic Architectures: Integrating Curvature‐Driven Design for Enhanced Mechanical Tunability and Structural Performance

Advanced Engineering Materials, EarlyView.
Curvature‐tuned auxetic lattices are designed, fabricated, and mechanically characterized to reveal how geometric curvature governs stretchability, stress redistribution, and Poisson's ratio evolution. Photoelastic experiments visualize stress pathways, while hyperelastic simulations quantify deformation mechanics.
Shuvodeep De, Giovanni Meli, Meysam Khalighian, Anahita Emami   +3 more
wiley   +1 more source

Azimuthal distributions of radial momentum and velocity in relativistic heavy ion collisions

, 2012
Azimuthal distributions of radial (transverse) momentum, mean radial momentum, and mean radial velocity of final state particles are suggested for relativistic heavy ion collisions.
Hwa R C, Landau L D, Lin Li, Na Li, Oh Y, Song Hui-Chao, Teaney D A, Voloshin S A, Yuan-Fang Wu   +8 more
core   +1 more source

Unidirectional Tape‐Based Composites from Hemp and Pineapple Leaf Fiber: Mechanical Performance in Conventional and Bio‐Based Matrices

Advanced Engineering Materials, EarlyView.
The study investigates novel semi‐finished products made of unidirectionally arranged hemp or pineapple leaf fiber‐reinforced composites produced from different matrices. The materials are analyzed in terms of their mechanical and interfacial properties and void content.
Nina Graupner, Raja Bade, Valentin Ackermann, Roja M. Baumann, Corvin Bischoff, Jona F. Ebeling, Oskar Glenz, Marlo Groh, Jonathan Groth, Finja Hiller, Tom Hirschmüller, Felix Menke, Syntcha Ngantchou Lecdou, Mika Ohler, Daniel Rafii Vardiny, Darius Richter, Dario Röper, Henrik Schumacher, Theresa Stein, Benjamin Vorbeck, Elisabeth Wermter, Kay Kölzig, Jörg Müssig   +22 more
wiley   +1 more source

HD 119130 b Is Not an “Ultradense” Sub-Neptune

The Astronomical Journal
We present a revised mass measurement for HD 119130 b (aka K2-292 b), a transiting planet ( P = 17 days, R _p = ${2.63}_{-0.10}^{+0.11}$ R _⊕ ) orbiting a chromospherically inactive G dwarf, previously thought to be one of the densest sub-Neptunes known.
Joseph M. Akana Murphy, Rafael Luque, Natalie M. Batalha, Ilaria Carleo, Enric Palle, Madison Brady, Benjamin Fulton, Luke B. Handley, Howard Isaacson, Gaia Lacedelli, Felipe Murgas, Grzegorz Nowak, J. Orell-Miquel, Hannah L. M. Osborne, Vincent Van Eylen, María Rosa Zapatero Osorio   +15 more
doaj   +1 more source