Results 111 to 120 of about 158,293 (319)

Asteroseismology of Metal-poor Red Giants Observed by TESS

The Astrophysical Journal
Galactic archeology has long been limited by a lack of precise masses and ages for metal-poor stars in the Milky Way’s thick disk. However, with TESS providing a growing number of photometric observations, it is possible to calculate masses and ages for ...
Corin Marasco, Jamie Tayar, David Nidever   +2 more
doaj   +1 more source

Dimensionless Investigations on Energy Conversion and Analysis of Interlayer Time in Laser‐Based Powder Bed Fusion of Polymers for Polyamide 12 with Nanoadditives and Polypropylene

Advanced Engineering Materials, EarlyView.
This study explores the energy conversion in powder bed fusion of polymers using laser beam for polyamide 12 and polypropylene powders. It combines material and process data, using dimensionless parameters and numerical models, to enable the prediction of suitable printing parameters.
Christian Schlör, Moritz Grünewald, Kevin Popp, Ihsan Murat Kusoglu, Stephan Barcikowski, Stan Gann, Thomas Schuffenhauer, Martin Bastian, Claas Bierwisch, Johannes Rudloff   +9 more
wiley   +1 more source

Nanoparticle‐Coated X2CrNiMo17‐12‐2 Powder for Additive Manufacturing—Part II: Processability by Powder Bed Fusion of Metals Using a Laser Beam

Advanced Engineering Materials, EarlyView.
In this manuscript, the processability of X2CrNiMo17‐12‐2 powder coated with silicon carbide, silicon, and silicon nitride nanoparticles is investigated. The amount of nanoparticles varies from 0.25 to 1 vol%. By coating the powder feedstock material with nanoparticles, an enlargement of the process window and an increase in the build rate are achieved.
Nick Hantke, Tim R. Brocksieper, Arne Lüddecke, Tobias Grimm, Arno Kwade, Jan T. Sehrt   +5 more
wiley   +1 more source

Beyond Order: Perspectives on Leveraging Machine Learning for Disordered Materials

Advanced Engineering Materials, EarlyView.
This article explores how machine learning (ML) revolutionizes the study and design of disordered materials by uncovering hidden patterns, predicting properties, and optimizing multiscale structures. It highlights key advancements, including generative models, graph neural networks, and hybrid ML‐physics methods, addressing challenges like data ...
Hamidreza Yazdani Sarvestani, Surabhi Nadigotti, Erfan Fatehi, Derek Aranguren van Egmond, Behnam Ashrafi   +4 more
wiley   +1 more source

Four-hundred Very Metal-poor Stars Studied with LAMOST and Subaru. III. Dynamically Tagged Groups and Chemodynamical Properties

The Astrophysical Journal
Very metal-poor (VMP) stars record the signatures of early accreted galaxies, making them essential tools for unraveling the early stages of Galaxy formation.
Ruizhi Zhang, Tadafumi Matsuno, Haining Li, Wako Aoki, Xiang-Xiang Xue, Takuma Suda, Gang Zhao, Yuqin Chen, Miho N. Ishigaki, Jianrong Shi, Qianfan Xing, Jingkun Zhao   +11 more
doaj   +1 more source

Stellar Archaeology -- Exploring the Universe with Metal-Poor Stars

, 2010
The abundance patterns of the most metal-poor stars in the Galactic halo and small dwarf galaxies provide us with a wealth of information about the early Universe.
Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Aoki, Argast, Arlandini, Arnone, Asplund, Barbuy, Barklem, Beers, Beers, Bergemann, Bessell, Bisterzo, Bonifacio, Bromm, Bromm, Bromm, Burris, Carollo, Carretta, Cayrel, Cayrel, Christlieb, Christlieb, Cohen, Cohen, Cohen, Cohen, Cohen, Cohen, Collet, Cowan, Diemand, Feltzing, François, Frebel, Frebel, Frebel, Frebel, Frebel, Frebel, Frebel, Frebel, Frebel, Fröhlich, Fulbright, Fulbright, Geh, Geisler, Hayek, Heger, Hill, Honda, Honda, Honda, Iben, Ito, Ivans, Ivans, Ivans, Iwamoto, Johnson, Johnson, Johnson, Johnson, Johnson, Johnston, Jonsell, Jonsell, Karakas, Karlsson, Kirby, Kirby, Koch, Koch, Kratz, Kratz, Lai, Lai, Lai, Limongi, Lucatello, Masseron, McWilliam, McWilliam, Meynet, Meynet, Norris, Norris, Norris, Norris, Norris, Norris, Norris, Norris, Norris, Plez, Preston, Preston, Preston, Qian, Robertson, Roederer, Roederer, Ryan, Ryan, Ryan, Schatz, Schneider, Schörck, Searle, Shetrone, Shetrone, Shigeyama, Simmerer, Simon, Sivarani, Sivarani, Sneden, Sneden, Sneden, Sobeck, Spergel, Spite, Spite, Springel, Suda, Suda, Tominaga, Travaglio, Umeda, Wanajo, Westin, Wisotzki, Woosley, Yoshida, Zacs   +148 more
core   +1 more source

Low‐Activation Compositionally Complex Alloys for Advanced Nuclear Applications—A Review

Advanced Engineering Materials, EarlyView.
Low‐activation compositionally complex alloys (LACCAs) are advanced metallic materials primarily composed of low‐activation elements, offering advantages such as rapid compliance with operational standards and safe recyclability. This review highlights their potential for extreme high‐temperature irradiation environments as structural materials for ...
Yangfan Wang, Hanliang Zhu, Zhiyang Wang, Zhijun Qiu, Xiao Wang, Zengxi Pan, Hongtao Zhu, Mingxing Zhang, Huijun Li   +8 more
wiley   +1 more source

STELLAR OBJECTS OF EXTRAGALACTIC ORIGIN IN THE GALACTIC HALO

Odessa Astronomical Publications, 2007
We identified globular clusters and field stars of extragalactic origin and investigated their chemical, physical, and kinematical properties. This objects as supposed was captured by the Galaxy at different times from debris of the dwarf satellite ...
V. A. Marsakov, T. V. Borkova
doaj   +1 more source

Efficient Searches for r-Process-Enhanced, Metal-Poor Stars

, 2004
Neutron-capture-enhanced, metal-poor stars are of central importance to developing an understanding of the operation of the r-process in the early Galaxy, thought to be responsible for the formation of roughly half of all elements beyond the iron peak. A
Hill, Honda, N. Christlieb, P.S. Barklem, Sneden, Sneden, T.C. Beers, V. Hill   +7 more
core   +2 more sources

Effect of Acrylic Structural Adhesive as a Joint Reinforcement on Film Deformation during the Thermoforming Process for In‐Mold Electronic Devices

Advanced Engineering Materials, EarlyView.
In‐mold electronics (IME) enables the integration of circuits into more complex scenarios, yet the key challenge remains ensuring a fully functional device. This study investigates how the presence of structural adhesives can improve the performance and functionality of IME devices, addressing key challenges in device integration.
Francisco Ituriel Arias‐García, Nekane Lozano‐Hernandez, Maria Lluisa Maspoch, Enric Fontdecaba   +3 more
wiley   +1 more source