Results 81 to 90 of about 53,996 (279)

Spectral modelling of the "Super-Chandra" Type Ia SN 2009dc - testing a 2 M_sun white dwarf explosion model and alternatives [PDF]

, 2012
Extremely luminous, super-Chandrasekhar (SC) Type Ia Supernovae (SNe Ia) are as yet an unexplained phenomenon. We analyse a well-observed SN of this class, SN 2009dc, by modelling its photospheric spectra with a spectral synthesis code, using the ...
Abbott, Arnett, Asplund, Astier, Bravo, Burrows, Burstein, Chugai, Claeys, D'Souza, Dan, Ergma, Filippenko, Fink, Fink, Foley, Foley, Hachinger, Hachinger, Hachinger, Hachisu, Hamuy, Hamuy, Hicken, Hillebrandt, Hillebrandt, Howell, Iben, Ivo R. Seitenzahl, Iwamoto, Iwamoto, Iwamoto, Kasen, Khokhlov, Li, Lucy, Marek, Mazzali, Mazzali, Mazzali, Mazzali, Mazzali, Mazzali, Michael Fink, Motl, Nomoto, Nomoto, Pakmor, Pakmor, Pakmor, Paolo A. Mazzali, Pastorello, Perlmutter, Perlmutter, Pfannes, Pfannes, Phillips, Phillips, Phillips, Podsiadlowski, Riess, Ruiter, Röpke, Rüdiger Pakmor, Saio, Sauer, Scalzo, Scannapieco, Schlegel, Silverman, Sim, Sim, Smith, Stefan Taubenberger, Stehle, Steinmetz, Stephan Hachinger, Tanaka, Tanaka, Tang, Taubenberger, Umeda, Wolfgang Hillebrandt, Wood-Vasey, Woosley, Yamanaka, Yoon, Yoon   +87 more
core   +2 more sources

Non‐Equilibrium Synthesis Methods to Create Metastable and High‐Entropy Nanomaterials

Advanced Science, EarlyView.
ABSTRACT Stabilizing multiple elements within a single phase enables the creation of advanced materials with exceptional properties arising from their complex composition. However, under equilibrium conditions, the Hume–Rothery rules impose strict limitations on solid‐state miscibility, restricting combinations of elements with mismatched crystal ...
Shuo Liu, Chaochao Dun, Jeffrey J. Urban, Mark T. Swihart   +3 more
wiley   +1 more source

Surface Detonations in Double Degenerate Binary Systems Triggered by Accretion Stream Instabilities

, 2009
We present three-dimensional simulations on a new mechanism for the detonation of a sub-Chandrasekhar CO white dwarf in a dynamically unstable system where the secondary is either a pure He white dwarf or a He/CO hybrid.
Bildsten, Chandrasekhar, D'Souza, Dan, Foley, Fryxell, Gokhale, Khokhlov, Krumholz, Livio, Motl, Napiwotzki, Napiwotzki, New, Niemeyer, Perets, Ramirez-Ruiz, Rosswog, Rosswog, Rosswog, Röpke, Segretain, Seitenzahl, Swesty, Timmes, Timmes, Timmes   +26 more
core   +1 more source

Compositional Tuning and Surface Restructuring Synergistically Enhance Perovskite Ferrite Catalysts for Hydrogen Evolution in a Membrane‐Less Electrolyzer

Advanced Energy Materials, EarlyView.
In this work, a self‐restructuring Fe‐based perovskite catalyst is developed, leveraging in situ amorphization to achieve a “self‐improving” behavior for hydrogen evolution. When integrated into a custom‐built membrane‐less electrolyzer, the system demonstrates a record‐breaking 1000 h stability, providing a robust and practical pathway for the ...
Yixin Bi, Yuhao Wang, Zilong Wang, Yufei Song, Nuotong Li, Jingwei Li, Arini Kar, Qing Chen, Francesco Ciucci   +8 more
wiley   +1 more source

Wirelessly Powered Soft Magnetic Robot with Microneedle for Electrical Stimulation and Drug Delivery

Advanced Intelligent Systems, EarlyView.
A wirelessly powered soft magnetic robot integrates microneedles to enable dual functions: electrical stimulation (86.7% efficiency at 6 cm, tunable 0–20 V voltage, 0.4–50 ms pulses) and drug delivery. It switches surfaces via magnetic fields for gastrointestinal tract locomotion and treatment, with in vitro validation in fresh pig gut showing ...
Song Zhao, Liwen Zhang, Shengbin Zhang, Botao Ma, Meng Wang, Yipan Zuo, Xinzhao Zhou, Xueshan Jing, Huawei Chen   +8 more
wiley   +1 more source

Analysis of Aerodynamic Characteristics of Rotating Detonation Turbine Based on Proper Orthogonal Decomposition Method

Aerospace
The unsteady interactions in rotating detonation turbine engines (RDTE) remain poorly understood. To address this, a 2D numerical model integrating a rotating detonation combustor (RDC) with a first-stage turbine is established to analyze flow structures
Meiting Ling, Ting Zhao, Wenguo Luo, Jianfeng Zhu, Yancheng You   +4 more
doaj   +1 more source

Preliminary Computational Assessment of Disk Rotating Detonation Engine Configurations [PDF]

A rotating detonation engine (RDE) configuration whereby the working fluid enters and exits in a predominantly radial manner is examined using a quasi-two-dimensional computational fluid dynamic simulation. The simulation, based on a Cartesian coordinate
Paxson, Daniel E.
core   +1 more source

Flame Instability and Transition to Detonation in Supersonic Reactive Flows

, 2017
Multidimensional numerical simulations of a homogeneous, chemically reactive gas were used to study ignition, flame stability, and deflagration-to-detonation transition (DDT) in a supersonic combustor.
Center, Dyer R., Kaplan C. R., Taylor G., Xiao H.   +4 more
core   +1 more source

Real‐Time and Rapid Dynamic Missile Identification Utilizing a TiOx Memristor Array

Advanced Intelligent Systems, EarlyView.
Real‐time missile target identification is demonstrated using an artificial intelligence model based on step‐weighted long–short‐term memory networks and a TiOx memristor array. The approach classifies five projectile types with enhanced early‐stage prediction through data augmentation and custom training strategies. Achieving 94.4% accuracy, the model
Mingyu Kim, Gwanyeong Park, Gunuk Wang
wiley   +1 more source

Energy Landscapes in Chemical Reactions and Transport

ChemPhysChem, Volume 26, Issue 6, March 15, 2025.
Kinetics/dynamics of chemical reactivity and transport of chemical species in a solid are both determined by the energy landscape in which they take place. Discussing common grounds but also distinct differences may help in advancing the understanding in both fields.
Karl‐Michael Weitzel
wiley   +1 more source