Results 131 to 140 of about 4,122,931 (339)

A spectroscopic survey of faint, high-galactic latitude red clump stars. II. The medium resolution sample

, 2010
Aims. The goal of our survey is to provide accurate and multi-epoch radial velocities, atmospheric parameters (Teff, log g and [M/H]), distances and space velocities of faint Red Clump stars. Methods. We recorded high signal-to-noise (S/N >= 200) spectra
A. Vallenari, Antoja, Arenou, Bessell, Bienayme, Cabrera-Lavers, Castelli, Correnti, Drimmel, Famaey, Freeman, Girardi, Hekker, Johnson, Keenan, Law, M. Fiorucci, Munari, Nataf, Nordström, Ruchti, Siebert, Siebert, Soubiran, Soubiran, Soubiran, Steinmetz, T. Saguner, Takeda, U. Munari, Valentini, Veltz, Zwitter, Zwitter   +33 more
core   +1 more source

Experimental Evaluation of 100Cr6 Steel Microindented Surfaces Under Lubricated Nonconformal Point Contacts

Advanced Engineering Materials, EarlyView.
The tribological behavior of 100Cr6 steel spheres textured via Vickers microindentation is evaluated under lubricated sliding by varying both dimple size and density. Fine and dense textures significantly reduce friction across all lubrication regimes, while large dimples increase it.
Farideh Davoodi, Pasquale Guglielmi, Gianfranco Palumbo, Giuseppe Carbone   +3 more
wiley   +1 more source

An autonomous cloud detection algorithm using single ground-based infrared radiometer for the Tibetan Plateau [PDF]

Atmospheric Measurement Techniques
Accurate cloud detection over the Tibetan Plateau (TP) is crucial for understanding regional weather patterns and global climate dynamics. Yet, it remains challenging due to harsh environmental conditions and sparse observations.
L. Pan, Y. Wang, Y. Bi
doaj   +1 more source

Observational Techniques with Transiting Exoplanetary Atmospheres [PDF]

, 2018
47 pages, 19 figures. Lectures presented at the 2nd Advanced School on Exoplanetary Science, May. 22 - 26, 2017, Vietri sul Mare, Italy. To appear in Astrophysics of Exoplanetary Atmospheres, Springer International Publishing, Editors Valerio Bozza, Luigi Mancini, Alessandro ...
openaire   +2 more sources

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

Analysis of Macro- and Microphysical Characteristics of Ice Clouds over the Tibetan Plateau Using CloudSat/CALIPSO Data

Remote Sensing
Utilizing CloudSat/CALIPSO satellite data and ERA5 reanalysis data from 2007 to 2016, this study analyzed the distributions of optical and physical characteristics and change characteristics of ice clouds over the Tibetan Plateau (TP).
Yating Guan, Xin Wang, Juan Huo, Zhihua Zhang, Minzheng Duan, Xuemei Zong   +5 more
doaj   +1 more source

Efficiency and Sensitivity Analysis of Observation Networks for Atmospheric Inverse Modelling with Emissions

, 2015
The controllability of advection-diffusion systems, subject to uncertain initial values and emission rates, is estimated, given sparse and error affected observations of prognostic state variables.
Elbern, Hendrik, Jacob, Birgit, Wu, Xueran   +2 more
core  

Atmospheric observation-based global SF6 emissions - comparison of top-down and bottom-up estimates [PDF]

, 2009
Emissions of sulphur hexafluoride (SF6), one of the strongest greenhouse gases on a per molecule basis, are targeted to be collectively reduced under the Kyoto Protocol.
Cuevas, Emilio, Engel, Andreas, Heinz, Renate, Ilmberger, Johann, Langenfelds, Ray L., Levin, Ingeborg, Naegler, Tobias, Neininger, Bruno, Osusko, Daniel, Rohden, Christoph von, Steele, L. Paul, Weller, Rolf, Worthy, Douglas E., Zimov, Sergej A.   +13 more
core  

Electrochemical Evaluation of Compressed Selective Laser Melted AlSi7Mg and AlSi10Mg Alloys in Chloride Environment

Advanced Engineering Materials, EarlyView.
The corrosion performance of AlSi7Mg and AlSi10Mg alloys produced through selective laser melting (SLM) was examined under compressive stress in a chloride environment. Electrochemical analyses, including open‐circuit potential (OCP), potentiodynamic polarization (CPP), and electrochemical impedance spectroscopy (EIS), were complemented by scanning ...
Femi John Akinfolarin, Samson Dare Oguntuyi, Peter Apata Olubambi   +2 more
wiley   +1 more source

Technology needs assessment of an atmospheric observation system for tropospheric research missions, part 1 [PDF]

The technology advancements needed to implement the atmospheric observation satellite systems for air quality research were identified. Tropospheric measurements are considered. The measurements and sensors are based on a model of knowledge objectives in
Alvarado, D. R., Bortner, M. H., Deryder, L. J., Frippel, G. G., Grenda, R. N., Halsey, H., Keafer, L. S., Kritikos, H., Neste, S. L.   +8 more
core   +1 more source