Results 41 to 50 of about 5,354,517 (282)

Is Gamma-Ray Burst 221009A Really a Once-in-10,000 yr Event?

The Astrophysical Journal
Gamma-ray bursts (GRBs) brighter than the GRB 221009A, the brightest yet observed, have previously been estimated to occur at a rate of one per 10,000 yr, based on the extrapolation of the distribution of fluences of the long-GRB population. We show that
Justin D. Finke, Soebur Razzaque
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Exploring the Nature of Galactic Unassociated Sources Detected by the Fermi-LAT

The Astrophysical Journal
We investigate the nature of the unassociated sources detected by the Fermi-LAT close (∣ b ∣ 
F. Acero, A. Acharyya, A. Adelfio, M. Ajello, E. Aviano, L. Baldini, J. Ballet, C. Bartolini, D. Bastieri, J. Becerra Gonzalez, R. Bellazzini, A. Bhat, E. Bissaldi, R. Bonino, P. Bruel, R. A. Cameron, P. A. Caraveo, F. Casaburo, F. Casini, E. Cavazzuti, N. Cibrario, S. Ciprini, G. Cozzolongo, P. Cristarella Orestano, F. Cuna, S. Cutini, F. D’Ammando, P. de la Torre Luque, D. Depalo, N. Di Lalla, A. Dinesh, L. Di Venere, A. Domínguez, J. Eagle, C. Fernández-Suárez, A. Fiori, Y. Fukazawa, S. Funk, P. Fusco, F. Gargano, C. Gasbarra, D. Gasparrini, S. Germani, F. Giacchino, N. Giglietto, M. Giliberti, F. Giordano, M. Giroletti, I. A. Grenier, M.-H. Grondin, S. Guiriec, R. Gupta, M. Hashizume, E. Hays, J.W. Hewitt, A. Holzmann Airasca, D. Horan, X. Hou, T. Kayanoki, M. Kerr, M. Kuss, D.A. Langis, A. Laviron, M. Lemoine-Goumard, A. Liguori, J. Li, I. Liodakis, P. Loizzo, F. Longo, F. Loparco, S. López Pérez, L. Lorusso, B. Lott, M. N. Lovellette, P. Lubrano, S. Maldera, D. Malyshev, G. Martí-Devesa, R. Martinelli, M. N. Mazziotta, I. Mereu, M. Michailidis, P. F. Michelson, T. Mizuno, P. Monti-Guarnieri, M. E. Monzani, A. Morselli, M. Negro, N. Omodei, M. Orienti, E. Orlando, D. Paneque, G. Panzarini, M. Persic, M. Pesce-Rollins, R. Pillera, T. A. Porter, G. Principe, S. Rainò, R. Rando, A. Reimer, O. Reimer, M. Sánchez-Conde, P. M. Saz Parkinson, D. Serini, C. Sgrò, E. J. Siskind, D. A. Smith, G. Spandre, P. Spinelli, A. W. Strong, D. J. Suson, H. Tajima, J. B. Thayer, D. J. Thompson, L. Tibaldo, D. F. Torres, J. Valverde, K. Wood, Q. Yu, G. Zaharijas, W. Zhang   +121 more
doaj   +1 more source

Unidentifed gamma-ray sources: hunting gamma-ray blazars

, 2012
24 pages, 4 figures, Accepted for publication on the Astrophysical ...
Massaro, F., D'Abrusco, R., Tosti, G., Ajello, M., Gasparrini, A.Paggi.D.   +4 more
openaire   +3 more sources

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Near-infrared and gamma-ray monitoring of TANAMI gamma-ray bright sources [PDF]

Astronomy & Astrophysics, 2013
Spectral energy distribution and its variability are basic tools for understanding the physical processes operating in active galactic nuclei (AGN). In this paper we report the results of a one-year near infra red (NIR) and optical monitoring of a sample of 22 AGN known to be gamma-ray emitters, aimed at discovering correlations between optical and ...
R. Nesci, TOSTI, Gino, T. Pursimo, R. Ojha, M. Kadler   +4 more
openaire   +3 more sources

DigiChrom: A Domain Ontology for Semantic Representation of Trivalent Chromium Platings and Its Large Language Model‐Based Alignment With Multiple Mid‐Level Ontologies

Advanced Engineering Materials, EarlyView.
Digitalizing electroplating requires both domain knowledge and interoperability. This work introduces PlatOn, a domain ontology for trivalent chromium plating and coating characterization, and a hybrid pipeline that aligns it to a mid‐level reference ontology by combining eight similarity metrics with language model reasoning. Expert‐validated mappings
Janik Harter, Elena Garcia Trelles, Christoph Schweizer, Thomas Seifert, Christoph Baumer, Mahmoud Elkady, Katja Feige, Daniel Grimme, Edgar Hoffmann, Andreas Waibel, Anke Walter   +10 more
wiley   +1 more source

Evidence that gamma-ray burst sources repeat [PDF]

Monthly Notices of the Royal Astronomical Society, 1993
We investigate clustering in the angular distribution of the 260 $γ$-ray bursts in the publicly available BATSE catalogue, using a nearest neighbour analysis and the measures of burst brightness $B$ and short time scale variability $V$ which we introduced earlier. We find that while all 260 bursts are only modestly clustered (Q-value = $1.8 \times 10^{-
Quashnock, J. M., Lamb, D. Q.
openaire   +2 more sources

Distinct Microstructural Characteristic Lengths Defining Notch Fatigue Crack Initiation and Propagation, and Defect Tolerance in Advanced Steels

Advanced Engineering Materials, EarlyView.
Schematic representation of modes of microcrack nucleation, growth and temporary arrestment at different boundaries, with the criteria for crack propagation in three scenarios: (1) large notch, (2) defect/small sharp notch, and (3) long crack. This work revisits and integrates results on the fatigue behavior of advanced bainitic steels (in particular ...
Lucia Morales‐Rivas
wiley   +1 more source

Evidence of Minijet Emission in a Large Emission Zone from a Magnetically Dominated Gamma-Ray Burst Jet

The Astrophysical Journal
The second brightest gamma-ray burst (GRB) in history, GRB 230307A, provides an ideal laboratory to study the mechanism of GRB prompt emission thanks to its extraordinarily high photon statistics and its single-episode activity.
S.-X. Yi, C.-W. Wang, X. Shao, R. Moradi, H. Gao, B. Zhang, S.-L. Xiong, S.-N. Zhang, W.-J. Tan, J.-C. Liu, W.-C. Xue, Y.-Q. Zhang, C. Zheng, Y. Wang, P. Zhang, Z.-H. An, C. Cai, P.-Y. Feng, K. Gong, D.-Y. Guo, Y. Huang, B. Li, X.-B. Li, X.-Q. Li, X.-J. Liu, Y.-Q. Liu, X. Ma, W.-X. Peng, R. Qiao, L.-M. Song, J. Wang, P. Wang, Y. Wang, X.-Y. Wen, S. Xiao, Y.-B. Xu, S. Yang, Q.-B. Yi, D.-L. Zhang, F. Zhang, H.-M. Zhang, J.-P. Zhang, Z. Zhang, X.-Y. Zhao, Y. Zhao, S.-J. Zheng   +45 more
doaj   +1 more source