Results 41 to 50 of about 2,078,750 (288)

The Promise of Solid Lubricants for a Sustainable Future

Advanced Materials, EarlyView.
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher, Andrey A. Voevodin, András Korényi‐Both, Maria Clelia Righi, Christopher DellaCorte, Nazlim Bagcivan, Ali Erdemir, Carsten Gachot   +7 more
wiley   +1 more source

Soft X‐Ray Imaging of Dense and Fast Magnetosheath Jets: Numerical Simulations

Earth and Space Science
The goal of this paper is to estimate the soft X‐ray signature associated with dense and fast magnetosheath jets streaming toward the dayside magnetosphere. We developed a non‐self‐consistent kinematic approach for simulating numerically the transport of
G. Voitcu, M. Echim, M. Teodorescu, C. Munteanu   +3 more
doaj   +1 more source

Development of High‐Performance Multilayer Monochromators

Advanced Optical Materials, EarlyView.
Detailed insights into the optical and multilayer design of Double Multilayer Monochromators (DMM) are presented and fully characterized, including key optimization strategies and solutions to fabrication challenges. By integrating in‐house Ion Beam Figuring and a high uniformity multilayer coating process, the developed DMMs achieve high reflectivity,
Wadwan Singhapong, Arindam Majhi, Wai Jue Tan, Vishal Dhamgaye, Riley Shurvinton, Paresh Pradhan, Igor Dolbnya, Lucia Alianelli, Chris Bowen, Alexander J. G. Lunt, Hongchang Wang, Kawal Sawhney   +11 more
wiley   +1 more source

Einstein Probe Discovery of EP J005245.1−722843: A Rare Be–White Dwarf Binary in the Small Magellanic Cloud?

The Astrophysical Journal Letters
On 2024 May 27, the Wide-field X-ray Telescope on board the Space Sciences, University of Chinese Academy of Einstein Probe (EP) mission detected enhanced X-ray emission from a new transient source in the Small Magellanic Cloud during its commissioning ...
A. Marino, H. N. Yang, F. Coti Zelati, N. Rea, S. Guillot, G. K. Jaisawal, C. Maitra, J.-U. Ness, F. Haberl, E. Kuulkers, W. Yuan, H. Feng, L. Tao, C. Jin, H. Sun, W. Zhang, W. Chen, E. P. J. van den Heuvel, R. Soria, B. Zhang, S.-S. Weng, L. Ji, G. B. Zhang, X. Pan, Z. Lv, C. Zhang, Z. X. Ling, Y. Chen, S. Jia, Y. Liu, H. Q. Cheng, D. Y. Li, K. Gendreau, M. Ng, T. Strohmayer   +34 more
doaj   +1 more source

Classification of Chandra X-Ray Sources in Cygnus OB2

The Astrophysical Journal Supplement Series, 2023
We have devised a predominantly Naive Bayes−based method to classify X-ray sources detected by Chandra in the Cygnus OB2 association into members, foreground objects, and background objects.
Vinay L. Kashyap, Mario G. Guarcello, Nicholas J. Wright, Jeremy J. Drake, Ettore Flaccomio, Tom L. Aldcroft, Juan F. Albacete Colombo, Kevin Briggs, Francesco Damiani, Janet E. Drew, Eduardo L. Martin, Giusi Micela, Tim Naylor, Salvatore Sciortino   +13 more
doaj   +1 more source

Hundreds of Nanocoulomb Electron Acceleration Driven by Multipetawatt Laser in Subcritical Density Plasmas

Advanced Photonics Research, EarlyView.
Electron acceleration using multipetawatt femtosecond lasers and subcritical density plasmas achieves a maximum charge of 245 nC, with an injection rate of up to 100 nC per picosecond. The charge variation with plasma density, initially increasing and then decreasing, arises from the competition between the injection of multiple plasma waves and laser ...
Xi‐Chen Hu, Ming‐Yang Zhu, Yi‐Fei Li, Jie Feng, Guang‐Wei Lu, Yao‐Jun Li, Xu‐Lei Ge, Xiao‐Jun Huang, Wen‐Chao Yan, Li‐Ming Chen   +9 more
wiley   +1 more source

Evidence for GeV Gamma-Ray Emission from Intense GRB 240529A During the Afterglow’s Shallow Decay Phase

The Astrophysical Journal
X-ray light curves of gamma-ray burst (GRB) afterglows exhibit various features, with the shallow decay phase being particularly puzzling. While some studies report the absence of the X-ray shallow decay for hyperenergetic GRBs, recently discovered GRB ...
Kenta Terauchi, Tomohiko Oka, Katsuaki Asano   +2 more
doaj   +1 more source

NIR‐II Responsive Multifunctional Scaffold Enabling “Kill‐Modulation‐Build” Synergistic Therapy for Infectious Bone Defects

Advanced Science, EarlyView.
A novel multifunctional scaffold with photothermal effects is developed for infected bone defect repair. It facilitates angiogenesis and osteogenesis while eliminating bacteria through hyperthermia. Additionally, the scaffold promotes macrophage polarization from M1 to M2 via ROS scavenging, enhancing anti‐inflammatory activity. This study demonstrates
Qifei Yang, Shu Lou, Yuan Zhang, Zhurun Fang, Changyue Xing, Wentao Wang, Minxuan Han, Zhendong Wang, Ben Zhong Tang, Ming Zhang   +9 more
wiley   +1 more source

Acidogenesis‐Propelled Coordination Transition in Light‐Triggered Fe‐Polyphenol Polymer for Reactive Oxygen Species‐Augmented Antitumor Therapy

Advanced Science, EarlyView.
A novel iron‐polyphenol‐photoacid coordination polymer (FeBPs) is designed to achieve red light‐triggered external acidification and internal coordination regulation, where this light‐controlled acidification induces coordination changes that enhance Fe active site exposure and provide H+ for beneficial Fe3+/Fe2+ conversion, thereby accelerating ROS ...
Ying Wan, Hui Liu, Lin Gao, Guanyu Tan, Kailin Li, Qiwei Tian, Shiping Yang, Lu An   +7 more
wiley   +1 more source

X-ray and gamma-ray orbital variability from the gamma-ray binary HESS J1832-093

, 2020
Context. Gamma-ray binaries are systems composed of a massive star and a compact object whose interaction leads to particle acceleration up to relativistic energies. In the last fifteen years, a few binaries have been discovered to emit at high energies,
Martí-Devesa, G., Reimer, O.
core   +1 more source