Results 71 to 80 of about 59,557 (297)

Ultrahigh Strength with Suppressed Flow Instability at Liquid Helium Temperature via Coherent Nanoprecipitation in a Medium‐Entropy Alloy

Advanced Functional Materials, EarlyView.
It is demonstrated that severe lattice distortion and coherent nanoprecipitates overcome the strength–ductility dilemma and mitigate discontinuous plastic flow (DPF) at 4.2 K. Such microstructural design enhances both thermal and athermal stress components, leading to exceptional mechanical performance.
Min Young Sung, Tae Jin Jang, Sang Yoon Song, Chang‐Gi Lee, Jun Ho Lee, Young‐Kyun Kim, Sang‐Ho Oh, Byeong‐Joo Lee, Alireza Zargaran, Se‐Ho Kim, Young‐Sang Na, Seok Su Sohn   +11 more
wiley   +1 more source

Inferring the physics of protoplanetary disc evolution from the irradiated Cygnus OB2 region

Astronomy & Astrophysics
Context. Determining the physical processes driving protoplanetary disc evolution is of paramount importance for understanding planet formation. Our current understanding has crystallised around two possible evolution scenarios: turbulent viscosity and ...
Weder Jesse, Winter Andrew J., Mordasini Christoph   +2 more
doaj   +1 more source

Mass Accretion Processes in Young Stellar Objects: Role of Intense Flaring Activity

Acta Polytechnica CTU Proceedings, 2014
According to the magnetospheric accretion scenario, young low-mass stars are surrounded by circumstellar disks which they interact with through accretion of mass. The accretion builds up the star to its nal mass and is also believed to power the mass out
Salvatore Orlando, Fabio Reale, Giovanni Peres, Andrea Mignone   +3 more
doaj   +1 more source

Global Models of Runaway Accretion in White Dwarf Debris Disks

, 2012
A growing sample of white dwarfs (WDs) with metal-enriched atmospheres are accompanied by excess infrared emission, indicating that they are encircled by a compact dusty disk of solid debris. Such `WD debris disks' are thought to originate from the tidal
Bergeron, Bochkarev, Brandenburg, Brian D. Metzger, Brinkworth, Chu, Coleman, Cumming, Cuzzi, Cuzzi, Daisaka, Davis, Debes, Debes, Debes, Dobrovolskis, Drell, Dufour, Dufour, Duncan, Ehrenreich, Fabrika, Faller, Farihi, Farihi, Farihi, Farihi, Farihi, Fleming, Frank, Friedjung, Fromang, Ghosh, Goldreich, Goldreich, Gradshteyn, Graham, Gurevich, Gänsicke, Gänsicke, Gänsicke, Hansen, Hartmann, Johansen, Jura, Jura, Jura, Jura, Jura, Jura, Jura, Kilic, Kilic, Kilic, King, Klein, Koester, Koester, Konstantin V. Bochkarev, Leitch-Devlin, Lin, Melis, Metzger, Mullally, Paquette, Pringle, Rafikov, Rafikov, Roman R. Rafikov, Ruden, Schmidt, Shakura, Takeda, Tanaka, von Hippel, Weidenschilling, Whipple, Wickramasinghe, Wisdom, Wyatt, Youdin, Zuckerman, Zuckerman, Zuckerman   +83 more
core   +1 more source

Exploiting Two‐Photon Lithography, Deposition, and Processing to Realize Complex 3D Magnetic Nanostructures

Advanced Functional Materials, EarlyView.
Two‐photon lithography (TPL) enables 3D magnetic nanostructures with unmatched freedom in geometry and material choice. Advances in voxel control, deposition, and functionalization open pathways to artificial spin ices, racetracks, microrobots, and a number of additional technological applications.
Joseph Askey, Arjen van den Berg, Sandra Ruiz Gomez, Claire Donnelly, Dirk Grundler, Sam Ladak   +5 more
wiley   +1 more source

Constraining Binary Mergers in Active Galactic Nuclei Disks Using the Nonobservation of Lensed Gravitational Waves

The Astrophysical Journal Letters
The dense and dynamic environments within active galactic nuclei (AGN) accretion disks may serve as prolific birthplaces for binary black holes (BBHs) and one possible origin for some of the BBHs detected by gravitational-wave (GW) observatories. We show
Samson H. W. Leong, Justin Janquart, Aditya Kumar Sharma, Paul Martens, Parameswaran Ajith, Otto A. Hannuksela   +5 more
doaj   +1 more source

Slim Accretion Disks: Theory and Observational Consequences

Universe, 2019
The concept of slim accretion disks emerged over 30 years ago as an answer to several unsolved problems. Since that time there has been a tremendous increase in the amount of observational data where this model applies.
Bozena Czerny
doaj   +1 more source

Harmonizing the Pyrene and Ether Groups in Covalent Triazine Polymers for Highly Effective H2O2 Photosynthesis via One‐Step Two‐Electron Oxygen Reduction

Advanced Functional Materials, EarlyView.
The pyrene and ether groups are incorporated into the covalent triazine polymer (CTP) structure. The synergistic effect of the two functional groups endows CTP with better electron transfer, light absorption, and oxygen activation properties. An impressive apparent quantum yield (13.2% @420 nm) and a remarkable solar‐to‐chemical conversion efficiency ...
Chong Wang, Jinliang Lv, Yichun Lu, Hanfeng Ye, Xuan Zhang, Leonardo Cancellara, Nadezda Tarakina, Jiande Lin, Xin Gao, Oleksandr Savateev, Jiajia Cheng   +10 more
wiley   +1 more source

General relativistic radiative transfer: formulation and emission from structured tori around black holes

, 2012
We construct a general relativistic radiative transfer (RT) formulation, applicable to particles with or without mass in astrophysical settings. Derived from first principles, the formulation is manifestly covariant.
Abramowicz, Abramowicz, Anderson, Baiotti, Balbus, Bao, Baschek, Beckwith, Beckwith, Beckwith, Blaes, Boyer, Carter, Chakrabarti, Cunningham, Dexter, Dolence, Eracleous, Fabian, Fabian, Fanton, Fuerst, Fuerst, Gerbal, Hawley, Horne, Hölzer, Johnston, K. Wu, Kojima, Kozlowski, Lynden-Bell, Marsh, Puchnarewicz, Reynolds, Rezzolla, S. V. Fuerst, Salpeter, Schnittman, Shakura, Shibata, Smak, Sochora, Soria, Stella, Strateva, Tanaka, Vincent, Wang, Wu, Wu, Wu, Z. Younsi, Zane, Čadež   +54 more
core   +1 more source

Stabilizing Cationic Palladium Single‐Atom Sites on Heteroatom‐Doped Carbon for Selective Hydrogen Peroxide Electrosynthesis

Advanced Functional Materials, EarlyView.
In this research, it is demonstrated that dual nitrogen and sulfur doping in hollow carbon spheres creates a tunable coordination environment that stabilizes cationic Pd single atoms as robust organometallic complexes, enabling high selectivity and stability for electrochemical hydrogen peroxide production under harsh acidic and peroxide‐rich ...
Guilherme V. Fortunato, Alexander Gunnarson, Hannaneh Hosseini, Xiangyu You, Pallabi Bhuyan, Ji Sik Choi, Hyo Sang Jeon, Xingshen Zhao, Julio C. Lourenço, Sumin Lim, Huize Wang, Ana Guilherme Buzanich, Martin Radtke, Paul Paciok, Marcos R.V. Lanza, Ferdi Schüth, Marc Ledendecker   +16 more
wiley   +1 more source