Results 61 to 70 of about 2,153,493 (386)
Kinematic and chemical components in the solar neighbourhood
EPJ Web of Conferences, 2012 Abundance data on solar neighbourhood stars suggest the presence of chemically-distinct stellar components in the solar neighbourhood. When the abundances of Fe, α elements, and the r-process element Eu are considered together, stars separate neatly into
Navarro J.F.
doaj +1 more source
Structural Parameters of Thin and Thick Disks in Edge-On Disk Galaxies
, 2005 We analyze the global structure of 34 late-type, edge-on, undisturbed, disk galaxies spanning a wide range of mass. We measure structural parameters for the galaxies using two-dimensional least-squares fitting to our $R$-band photometry. The fits require
Binggeli B. +20 more
core +1 more source
The Relative Age of the Thin and Thick Galactic Disks [PDF]
, 2000 We determine the relative ages of the open cluster NGC 188 and selected Hipparcos field stars by isochrone fitting, and compare them to the age of the thick disk globular cluster 47 Tuc. The best fit age for NGC 188 was determined to be $6.5 \pm 1.0$ Gyr.
Brian Chaboyer +7 more
core +4 more sources
Magnetically Torqued Thin Accretion Disks [PDF]
The Astrophysical Journal, 2007 9 sharper figs, updated ...
Kluzniak, W., Rappaport, S.
openaire +2 more sources
Scattering from thin dielectric disks [PDF]
IEEE Transactions on Antennas and Propagation, 1985 A solution for scattering from thin dielectric disks has been obtained by approximating the currents induced inside the disk with the currents which would exist inside a dielectric slab of the same thickness, orientation and dielectric properties. This procedure yields an electrostatic approximation when the disk thickness T is small compared to the ...
D. Le Vine +3 more
openaire +1 more source
Mode-locked thin-disk lasers and their potential application for high-power terahertz generation
, 2018 The progress achieved in the last few decades in the performance of ultrafast laser systems with high average power has been tremendous, and continues to provide momentum to new exciting applications, both in scientific research and technology. Among the
C. Saraceno
semanticscholar +1 more source
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Neuromyelitis Optica Spectrum Disorder (NMOSD) is a chronic autoimmune neuroinflammatory disease, typically characterized by antibodies against aquaporin 4 (AQP4‐IgG) or myelin oligodendrocyte glycoprotein (MOG‐IgG). Simultaneous seropositivity for both antibodies in a single patient is exceedingly rare.
Yeting Luo, Shuhua Xie, Xianghong Liu
wiley +1 more source
Kerr-Lens Mode-Locked 2-μm Thin-Disk Lasers
IEEE Journal of Selected Topics in Quantum Electronics, 2018 Thin-disk technology uniquely enables the simultaneous scaling of both average and peak powers, while maintaining an excellent beam profile. It has been widely adopted in the 1-μm region, not only for continuous wave lasers but also for pulsed ...
Jinwei Zhang, K. Mak, O. Pronin
semanticscholar +1 more source
Dynamic Precipitation during High‐Pressure Torsion of a Magnesium–Manganese Alloy
Advanced Engineering Materials, EarlyView.An ultrafine‐grained alloy is produced by high‐pressure torsion of solutionized Mg–1.35 wt% Mn. Precipitation of nanometer‐scale Mn particles during deformation provides pinning sites. This prevents the formation of a bimodal grain structure and results in a finer grain size than for pure Mg.
Julian M. Rosalie, Anton Hohenwarter
wiley +1 more source
Research Paper: Producing High Average Power Pulses From the Yb:YAG Thin-disk Active Medium with Acousto-optic Modulator [PDF]
فیزیک کاربردی ایرانIn recent years, thin-disk active media geometry has facilitated the development of pulsed and continuous laser sources with extremely high output powers. In this study, the technique of Q-switching utilizing an acousto-optic modulator and a Yb: YAG thin-
Kaveh Pasandideh +3 more
doaj +1 more source