Results 21 to 30 of about 29,323 (216)
An analysis of the 2016 Hitomi breakup event
Earth, Planets and Space, 2017 The breakup of Hitomi (ASTRO-H) on 26 March 2016 is analysed. Debris from the fragmentation is used to estimate the time of the event by propagating backwards and estimating the close approach with the parent object.
Sven Flegel +4 more
doaj +1 more source
IEEE Photonics Journal, 2016 The frequency-dependent dispersion impairment of high-speed printed analog traces in next-generation pluggable modules is studied. This frequency dependence is considered for the first time in optical fiber communication systems.
Yanir London, Dan Sadot
doaj +1 more source
IEEE AccessAtmospheric turbulence degrades long-range electro-optical (EO) imagery with geometric warping, blur, and temporal jitter. We present a CPU-only, registration-free, tile-wise multi-frame fusion operator specifically tailored for embedded mission systems ...
Zuhal Hancer +2 more
doaj +1 more source
AI-based defect detection and self-healing in metal additive manufacturing
Virtual and Physical PrototypingThis pilot study develops a process to evaluate in-situ defect detection and self-healing in Ti-6Al-4V fabricated using laser-based powder bed fusion.
Jan Akmal +9 more
doaj +1 more source
Electro-Optical Modulator Requirements for 1 Tb/s per Channel Coherent Systems
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2021 The electro-optical bandwidth and extinction ratio requirements of in-phase and quadrature modulators to enable 1 Tb/s per channel optical transmission rates are evaluated through numerical simulations.
Sandro Marcelo Rossi +3 more
doaj +1 more source
European Journal of Materials, 2022 Additive manufacturing (AM) by laser powder bed fusion (LPBF) involves melting of layers of powder onto a substrate, called a building platform. Due to cost or convenience considerations, building platform materials rarely match the LPBF material ...
Abdul Shaafi Shaikh +3 more
doaj +1 more source
Journal of Materials Research and TechnologyThis study examines the effect of Gaussian and ring-shaped laser beam profiles on the microstructural development and mechanical properties of the PBF-LB/M processed nickel-based alloy Inconel 718 in its as-built and post-heat-treated conditions.
Matjaž Godec +11 more
doaj +1 more source
Design of programmable multi-wavelength tunable filter on lithium niobate
Results in Physics, 2019 Tunable optical filters have a wide range of applications, especially in optical sensing systems and optical communication systems. In this letter, a programmable multi-wavelength tunable filter on Lithium Niobate (LN) is designed.
Yuan Yao +6 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar +2 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.This study demonstrates how optimizing laser power, scanning speed, and hatching distance in laser powder bed fusion can boost the productivity of Inconel 718 manufacturing by up to 29% while maintaining mechanical integrity. The work delivers a validated process window and cost–time analysis, offering industry‐ready guidelines for efficient additive ...
Amir Behjat +7 more
wiley +1 more source