Results 71 to 80 of about 291,546 (259)
Rotation velocities of hot horizontal branch stars in the globular clusters NGC 1904, NGC 2808, NGC 6093, and NGC 7078: The database [PDF]
, 2004 We present radial and rotation ($v\sin i$) velocity measurements from UVES+VLT high resolution spectra of 61 stars in the blue horizontal branches (HB) of the Galactic globular clusters NGC 1904 (M 79), NGC 2808, NGC 6093 (M 80) and NGC 7078 (M 15). The
A. Recio-Blanco +3 more
semanticscholar +1 more source
Search for planets around young stars with the radial velocity technique
, 2010 Giant planets form in circumstellar disks around young stars. Two alternative theoretical formation concepts, disk instability and core accretion, may both apply under certain conditions, but core accretion is believed to be the main mechanism. No observational proof of the dominant process has been found thus far. Therefore, this thesis aims to detect
openaire +2 more sources
Advanced Engineering Materials, EarlyView.In this study, the mechanical response of Y‐shaped core sandwich beams under compressive loading is investigated, using deep feed‐forward neural networks (DFNNs) for predictive modeling. The DFNN model accurately captures stress–strain behavior, influenced by design parameters and loading rates.
Ali Khalvandi +4 more
wiley +1 more source
HARPS-N OBSERVES THE SUN AS A STAR [PDF]
, 2015 Radial velocity (RV) perturbations induced by stellar surface inhomogeneities including spots, plages and granules currently limit the detection of Earth-twins using Doppler spectroscopy.
X. Dumusque +18 more
semanticscholar +1 more source
Bistable Mechanisms 3D Printing for Mechanically Programmable Vibration Control
Advanced Engineering Materials, EarlyView.This work introduces a 3D‐printed bistable mechanism integrated into tuned mass dampers (TMDs) for mechanically adaptive passive vibration suppression. Through optimized geometry, the bistable design provides adaptable vibration reduction across a broad range of scenarios, achieving effective vibration mitigation without complex controls or external ...
Ali Zolfagharian +4 more
wiley +1 more source
Investigation of gravity waves using horizontally resolved radial velocity measurements
, 2013 . The Middle Atmosphere Alomar Radar System (MAARSY) on the island of Andoya in Northern Norway (69.3° N, 16.0° E) observes polar mesospheric summer echoes (PMSE).
G. Stober +4 more
semanticscholar +1 more source
A Review of Progress and Applications of Pulsed Doppler Wind LiDARs
Remote Sensing, 2019 Doppler wind LiDAR (Light Detection And Ranging) makes use of the principle of optical Doppler shift between the reference and backscattered radiations to measure radial velocities at distances up to several kilometers above the ground.
Zhengliang Liu +7 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Molecular dynamics simulations are advancing the study of ribonucleic acid (RNA) and RNA‐conjugated molecules. These developments include improvements in force fields, long‐timescale dynamics, and coarse‐grained models, addressing limitations and refining methods.
Kanchan Yadav, Iksoo Jang, Jong Bum Lee
wiley +1 more source
Advanced Engineering Materials, EarlyView.Herein, silicon‐based nanoparticle coatings on X2CrNiMo17‐12‐2 metal powder are presented. The coating process scale, process parameters, nanoparticle size (65–200 nm) as well as the coating amount are discussed regarding powder properties. The surface roughness affects the flowability, while reflectance depends on the coating material and surface ...
Arne Lüddecke +4 more
wiley +1 more source
Periodic radial velocity variations in RU Lupi [PDF]
, 2006 Context. RU Lup is a Classical T Tauri star with unusually strong emission lines, which has been interpreted as manifestations of accretion. Recently, evidence has accumulated that this star might have a variable radial velocity. Aims.
H. C. Stempels, G. P. Petrov
semanticscholar +1 more source