Results 121 to 130 of about 16,732,055 (288)

Wideband Monitoring of FRB 20180916B across a Half Decade of Bandwidth Using the Upgraded GMRT

The Astrophysical Journal
With the upgraded Giant Metrewave Radio Telescope (uGMRT) having unprecedented sensitivity and unique capability of providing instantaneous frequency coverage of 250−1460 MHz, we studied FRB 20180916B with 4 month sampling during its active phase.
Siddhartha Bhattacharyya, Jayanta Roy, Apurba Bera   +2 more
doaj   +1 more source

Time-domain computation of the response of composite layered anisotropic plates to a localized source [PDF]

, 2014
This paper describes how a modal approach in the time-domain can be suitable for calculating the elastodynamic field in a layered plate. This elastodynamic field is generated by impulsive sources located in a small region of a composite plate consisting ...
DUCASSE, Eric, DESCHAMPS, Marc
core   +1 more source

Phase‐Dependent Oxygen Defect Energetics in Epitaxial NbN/AlN/NbN Films

Advanced Science, EarlyView.
Phase dependent oxygen defect energetics in epitaxial δ‐NbN/AlN/δ‐NbN and β‐Nb2N/AlN/β‐Nb2N trilayers. Atomic‐scale analysis and first‐principles calculations reveal distinct oxygen incorporation pathways across NbN polymorphs. Layer resolved defect formation energies show that O is energetically more favorable within δ‐NbN electrodes, whereas in β ...
Prachi Garg, Kedarsh Kaushik, Danqing Wang, Naomi Pieczulewski, Anand Ithepalli, John Wright, Debdeep Jena, David A. Muller, Hong X. Tang, Cyrus Dreyer, Baishakhi Mazumder   +10 more
wiley   +1 more source

SDHDF: A new file format for spectral-domain radio astronomy data [PDF]

Radio astronomy file formats are now required to store wide frequency bandwidths and multiple simultaneous receiver beams and must be able to account for versatile observing modes and numerous calibration strategies.
Hafner, A., McIntyre, V., Dawson, J. R., Huynh, M., Mader, S., Robishaw, T., Price, D. C., Wenger, T., Hobbs, G., Zic, A., Tremblay, C., Toomey, L. J., Carretti, E., Lagoy, D., Staveley-Smith, L., Sarkissian, J., Reynolds, J., CARRETTI, ETTORE, Green, J. A., Kaczmarek, J., Thompson, A.   +20 more
core   +1 more source

Symmetry‐Imposed Selection Rules for Excitations of Nontrivial Plasmonic Topologies

Advanced Science, EarlyView.
A unified group‐theory selection rule governs the excitation of vectorial nearfield topologies across three plasmonic spin states. Derived from first principles, it predicts spin–orbit vortex splitting and multidimensional nested vortices, confirmed by phase‐resolved in situ measurements.
Jie Yang, Pengyi Feng, Fei Han, Weijin Chen, Zhongwei Jin, Jincheng Ni, Yuanjie Yang, Anxue Zhang, Guy A. E. Vandenbosch, Niels Verellen, Ewald Janssens, Jiafu Wang, Benfeng Bai, Cheng‐Wei Qiu, Xuezhi Zheng   +14 more
wiley   +1 more source

Time Domain Infinite Impulse Response Filtering Approach for Simulation of Pulse Propagation in Optical Fiber with PMD [PDF]

, 2005
In this thesis, we have developed a full time domain approach for the simulation of pulse propagation in the optical fiber. Same as split-step method in frequency domain, this approach also treats the linear and nonlinear process alternately.
Zhao, Hongjing
core  

Multiphoton Quantum Reservoirs For Robust Multidimensional Computing

Advanced Science, EarlyView.
Projective measurements reveal hidden multidimensional quantum networks within classical multiphoton fields, enabling robust quantum reservoirs for room‐temperature quantum simulation, prediction, and information processing. These networks transform noisy classical photonic platforms into scalable quantum computational architectures.
Mingyuan Hong, Mario A. Quiroz‐Juarez, Riley B. Dawkins, Fatemeh Mostafavi, Jannatul Ferdous, Addison Wilberg, Blas M. Rodriguez‐Lara, Justin Woodring, Chenglong You, Roberto de J. León‐Montiel, Omar S. Magaña‐Loaiza   +10 more
wiley   +1 more source

Identifying Transitions in Changing-look Active Galactic Nuclei in Light-curve Data with the Zwicky Transient Facility

The Astrophysical Journal
Changing-look active galactic nuclei (CL-AGN) are AGN that transition between Seyfert types, challenging AGN unification models. Most CL-AGN have been identified via repeat spectroscopy, making it difficult to determine the duration and magnitude of the ...
Margaret E. Verrico, K. Decker French, Vivienne F. Baldassare, Colin J. Burke, Laura Duffy, Nicholas Earl, Megan Harrison, Jason T. Hinkle, Alexander Messick, Samaresh Mondal, Yashasvi Moon, Margaret Shepherd, Zachary Stone   +12 more
doaj   +1 more source

Quantum‐Trained AI Enables Inverse Design of Organic Frontier Orbitals at Billion‐Scale

Advanced Science, EarlyView.
Quantum‐trained AI links molecular substructures to frontier‐orbital energetics and enables interpretable screening across nearly one billion GDB‐13 molecules. By combining fragment‐ and ring‐level insights with donor–acceptor energy alignment against ITIC, the framework narrows an immense chemical space to a small set of promising candidates and ...
Yeongnam Ko, Se Jin Kim, Ki Chul Kim
wiley   +1 more source

Nineteenth century astronomy at the US Naval Academy [PDF]

, 2002
During the 1850s the newly-formed U.S. Naval Academy in Annapolis, Maryland, acquired a small observatory featuring a 19.7-cm (7.75-in.) Clark refractor, transit telescopes, and an astronomical clock.
Shankland, Paul D., Orchiston, Wayne
core   +1 more source