Results 51 to 60 of about 282,866 (344)
The Ages of the Thin Disk, Thick Disk, and the Halo from Nearby White Dwarfs
, 2017 We present a detailed analysis of the white dwarf luminosity functions derived from the local 40 pc sample and the deep proper motion catalog of Munn et al (2014, 2017).
DeGennaro, Steven +7 more
core +1 more source
Advanced Engineering Materials, EarlyView.Hydrostatic bearings excel in high‐precision applications, but their performance hinges on a continuous external supply. This study evaluates various material combinations for sliding surfaces to mitigate damage during supply failures or misalignment and to discover the most effective materials identified for enhancing the reliability and efficiency of
Michal Michalec +6 more
wiley +1 more source
Status of the High Average Power Diode-Pumped Solid State Laser Development at HiLASE
Applied Sciences, 2015 An overview of the latest developments of kilowatt-level diode pumped solid state lasers for advanced applications at the HiLASE Centre is presented. An overview of subcontracted and in-house-developed laser beamlines is presented. The aim of development
Ondřej Novák +26 more
doaj +1 more source
A Different Perspective on the Solid Lubrication Performance of Black Phosphorous: Friend or Foe?
Advanced Engineering Materials, EarlyView.Researchers investigate black phosphorous (BP) as a standalone solid lubricant coating through ball‐on‐disc linear‐reciprocating sliding experiments in dry conditions. Testing on different metals shows BP doesn't universally reduce friction and wear. However, it achieves 33% friction reduction on rougher iron surfaces and 23% wear reduction on aluminum.
Matteo Vezzelli +5 more
wiley +1 more source
Investigating the Lower Limit of Metallicity for the Galactic Thin Disk
The Astrophysical JournalWe explore the metal-poor regime of the Galactic disk on the distribution of stars in the [ α /M]– V _ϕ plane, to identify the most metal-poor thin disk (MPTnD) stars belonging to the low- α sequence.
Guozhen Hu +3 more
doaj +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
Black Hole Accretion with Saturated Magnetic Pressure and Disk Wind
The Astrophysical Journal, 2023 We construct an analytical black hole accretion disk model that incorporates both magnetic pressure and disk wind, which are found to be important from numerical simulations.
Jiahui Huang +3 more
doaj +1 more source
Numerical and Experimental Analysis of Yb:YAG Thin Disk Regenerative Amplifier
IEEE Photonics Journal, 2021 We present an numerical and experimental analysis of a Yb:YAG thin disk regenerative amplifier. Group velocity dispersion, third order dispersion, and self-phase modulation (SPM) effects are considered in the simulations of the amplification process.
Di Sun +6 more
doaj +1 more source
Two-component model for the chemical evolution of the Galactic disk [PDF]
, 1999 In the present paper, we introduce a two-component model of the Galactic disk to investigate its chemical evolution. The formation of the thick and thin disks occur in two main accretion episodes with both infall rates to be Gaussian.
Chang, R. X. +3 more
core +1 more source
Spectrophotometrically Identified stars in the PEARS-N and PEARS-S fields [PDF]
, 2008 Deep ACS slitless grism observations and identification of stellar sources are presented within the Great Observatories Origins Deep Survey (GOODS) North and South fields which were obtained in the Probing Evolution And Reionization Spectroscopically ...
A. J. Burgasser +28 more
core +3 more sources