Results 121 to 130 of about 158,293 (319)

An Examination of Aerosol Jet‐Printed Surface Roughness and its Impact on the Performance of High‐Frequency Electronics

Advanced Engineering Materials, EarlyView.
This study explores aerosol jet‐printed (AJP) surface roughness, its effects on the performance of microwave electronics, and its process contributors. First, an electromagnetic model is vetted for AJP's unique roughness signature. Simulations are built which show process‐induced roughness is as significant as conductor resistivity in driving microwave
Christopher Areias, Alkim Akyurtlu
wiley   +1 more source

The most metal poor stars

Accepted for publication on The Astronomy & Astrophysics ...
Bonifacio, P., Caffau, E., François, P., Spite, M.   +3 more
openaire   +2 more sources

Population Synthesis of Binary Carbon-enhanced Metal-poor Stars

, 2009
The carbon-enhanced metal-poor (CEMP) stars constitute approximately one fifth of the metal-poor ([Fe/H] ~< -2) population but their origin is not well understood. The most widely accepted formation scenario, invokes mass-transfer of carbon-rich material
Abia, Anders, Aoki, Aoki, Aoki, Aoki, Barbuy, Beers, Beers, Bonacic Marinovic, Bonacic Marinovic, Bondi, Boothroyd, Busso, Campbell, Charbonnel, Christlieb, Cohen, Collet, Cristallo, Denissenkov, Dewi, Duquennoy, E. Glebbeek, Eggleton, Eggleton, Eggleton, Frankowski, Frebel, Fujimoto, Gallino, Herwig, Herwig, Hurley, Iben, Iben, Izzard, Izzard, Izzard, Izzard, Johnson, Jonsell, Karakas, Karakas, Kippenhahn, Komiya, Kroupa, Lau, Lucatello, Lucatello, Lucatello, Luck, Lugaro, Masseron, McClure, McClure, McClure, Nelemans, Nollett, O. R. Pols, Otsuka, Pols, Preston, R. G. Izzard, R. J. Stancliffe, Richard, Richard, Ricker, Roederer, Ryan, Schlattl, Schröder, Schuler, Siess, Sneden, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Stancliffe, Straniero, Suda, Thompson, Tomkin, Tout, Tsangarides, van Loon, Vassiliadis, Weiss, Weiss   +91 more
core   +1 more source

Influence of an Al‐Doped ZnO Interface Layer on the Thermochromic Properties of VO2 Thin Films Deposited by RF Magnetron Sputtering

Advanced Engineering Materials, EarlyView.
Herein the metal‐to‐insulator transition is investigated when depositing vanadium dioxide (VO2) on glass or aluminum‐doped zinc oxide (AZO). O2 flow tuning during the deposition and additional post annealing are effective to control the metal‐to‐insulator transition. However, the VO2/AZO/glass stack reveals an increase in the transition temperature and
Eduard Llorens Balada, Evgeniy Shkondin, Stela Canulescu, Eugen Stamate   +3 more
wiley   +1 more source

Effect of Water Aging on the Mechanical Properties of Hybrid Carbon/Aramid Reinforced Thermoplastic Composites

Advanced Engineering Materials, EarlyView.
This study investigates the mechanical properties of Carbon/Aramid intraply hybrid fiber‐reinforced Elium composites under 6 months of water aging. After aging, flexural strength decreases by 25.89%, tensile strength by 4.40%, and fracture toughness by 21.56%.
Muhammed Huseyin Guzel, Gurol Onal
wiley   +1 more source

Nucleosynthesis in Metal-Free and Metal-Poor Stars

, 2008
There have been a number of important recent developments in theoretical and observational studies of nucleosynthesis, especially regarding nucleosynthetic sources at low metallicities.
Qian, Yong-Zhong
core   +1 more source

Coercivity Improvement in Ce‐Containing (Nd,Pr)‐Fe‐B‐Based Sintered Magnets by Application of the 2‐Powder Method

Advanced Engineering Materials, EarlyView.
This study investigates the magnetic properties and microstructures of 2PM‐manufactured Ce‐containing (Nd,Pr)‐Fe‐B magnets. The addition of Nd and Dy significantly enhances coercivity by 25% and 81%, respectively, attributed to core‐shell structures.
Chi‐Chia Lin, Konrad Opelt, Jürgen Dieter Rossa, Fernando Maccari, Songhak Yoon, Jürgen Gassmann, Oliver Gutfleisch   +6 more
wiley   +1 more source

Shape Memory Polymer‐Based Hook‐and‐Loop Fastener for Robust Bonding and on‐Demand Easy Separation

Advanced Engineering Materials, EarlyView.
A 3D shape memory polymer‐based hook‐and‐loop fastener, fabricated using projection microstereolithography and molding, offers tunable bonding strength through temperature control. When heated from 25 to 70 °C, the fastener softens and deforms easily, reducing bonding strength by 20‐fold for on‐demand easy separation.
Chen Yang, Yueping Wang, Hyunggyu Kim, Paul Wang, Daehoon Han, Howon Lee   +5 more
wiley   +1 more source

The R-process Alliance: Fifth Data Release from the Search for R-process-enhanced Metal-poor Stars in the Galactic Halo with the GTC

The Astrophysical Journal Supplement Series
Understanding the abundance pattern of metal-poor stars and the production of heavy elements through various nucleosynthesis processes offers crucial insights into the chemical evolution of the Milky Way, revealing primary sites and major sources of ...
Avrajit Bandyopadhyay, Rana Ezzeddine, Carlos Allende Prieto, Nima Aria, Shivani P. Shah, Timothy C. Beers, Anna Frebel, Terese T. Hansen, Erika M. Holmbeck, Vinicius M. Placco, Ian U. Roederer, Charli M. Sakari   +11 more
doaj   +1 more source

The Hertzsprung-Russell Diagram of Metal-Poor Disk Stars [PDF]

, 1978
Sidney van den Bergh
openalex   +1 more source