Results 61 to 70 of about 4,722,607 (293)

Rates and Beaming Angles of Gamma-Ray Bursts Associated with Compact Binary Coalescences

The Astrophysical Journal Letters
Some, if not all, binary neutron star (BNS) coalescences, and a fraction of neutron star–black hole (NSBH) mergers, are thought to produce sufficient mass ejection to power gamma-ray bursts (GRBs).
Shasvath J. Kapadia, Dimple, Dhruv Jain, Kuntal Misra, K. G. Arun, Resmi Lekshmi   +5 more
doaj   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

55% Efficient High-Power Multijunction Photovoltaic Laser Power Converters for 1070 nm

Photonics
High-efficiency multijunction laser power converters are demonstrated for the first time at high power for optical inputs around 1070 nm. The InP-based photovoltaic power-converting III–V heterostructures are designed with eight lattice-matched InGaAsP ...
Simon Fafard, Denis Masson
doaj   +1 more source

A Power Beaming Based Infrastructure for Space Power [PDF]

, 1991
At present all space mission power requirements are met by integral, on-board, self-contained power systems. To provide needed flexibility for space exploration and colonization, an additional approach to on-board, self-contained power systems is needed.
Bamberger, J. A.
core  

Symmetry‐Guided Multifunctional Acoustic System Based on Mechanically Actuated Sonic Crystals

Advanced Engineering Materials, EarlyView.
This study presents the design, simulation, and experimental validation of amultifunctional acoustic metamaterial based on rotationally engineered sonic crystals.By tuning cylinder orientations, controllable band gaps and six distinct functionalities—including switching, topological insulation, beam splitting, and logic operations—areachieved ...
Yuanyan Zhao, Sriram Subramanian, Gianluca Memoli   +2 more
wiley   +1 more source

Applications of power beaming from space-based nuclear power stations. [Laser beaming to airplanes; microwave beaming to ground]

, 1981
Power beaming from space-based reactor systems is examined using an advanced compact, lightweight Rotating Bed Reactor (RBR). Closed Brayton power conversion efficiencies in the range of 30 to 40% can be achieved with turbines, with reactor exit ...
Hertzberg, A., Botts, T.E., Powell, J.R.
core  

Power Beaming Leakage Radiation as A SETI Observable [PDF]

, 2016
The most observable leakage radiation from an advanced civilization may well be from the use of power beam-ing to transfer energy and accelerate spacecraft.
Benford, James N., Benford, Dominic J.
core  

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

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

Advanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi, Hadi Moutablaleh, Ignatius A. Setiawan, Mehrshad Mehrpouya   +3 more
wiley   +1 more source

Electrostatic-Accelerator Fels For Power Beaming

, 1995
We propose the use of electrostatic-accelerator free-electron lasers (EAFELs) to generate intense, CW, single-mode, laser radiation for space power beaming applications such as envisioned by the project SELENE.
Luis R. Elias, Isidoro Kimel, Elias, Luis R., Kimel, Isidoro   +3 more
core   +2 more sources