Results 41 to 50 of about 524,074 (324)

Bit- and Power-Loading—A Comparative Study on Maximizing the Capacity of RSOA Based Colorless DMT Transmitters

Applied Sciences, 2017
We present a comparative study of the capacity increase brought by bit- and power-loading discrete multi-tone (DMT) modulation for low-cost colorless transmitters.
Simon Arega Gebrewold, Romain Bonjour, Romain Brenot, David Hillerkuss, Juerg Leuthold   +4 more
doaj   +1 more source

Understanding light quanta: First quantization of the free electromagnetic field

, 2004
The quantization of the electromagnetic field in vacuum is presented without reference to lagrangean quantum field theory. The equal time commutators of the fields are calculated from basic principles.
A C de la Torre, Ballentine L E, Bohr N, Greenstein G, Jordan P, Landau L D, Milonni P W, Rosenfeld L, Schiff L I, Scully M O, Speziali P, Stanley R Q, Weinberg S, Wheeler J A, Wheeler J A, Ynduráin F J   +15 more
core   +1 more source

Evaluation of the Potential of Laser Shock Peening Compared with Cold Expansion for Improving Fatigue Resistance of Riveted Lap Joints of Aerospace Grade 7175 Al Alloy

Advanced Engineering Materials, EarlyView.
This study investigates laser shock peening for enhancing fatigue performance of riveted aerospace aluminum joints. A comparative approach with cold expansion combines fatigue testing and synchrotron X‐ray methods. Integrating mechanical testing with residual stress and strain characterization provides insights into how different treatments affect the ...
Ogün Baris Tapar, David Osman Busse, Maximilian Sprengel, Domenico Furfari, Marc‐André Nielsen, Guilherme Abreu Faria, Jérémy Epp   +6 more
wiley   +1 more source

All-plasmonic sub-terahertz wireless communication link

Nature Communications
A promising approach to increase wireless capacity is the transition to sub-Terahertz carrier frequencies (0.1–0.3 THz). While traditional high-frequency approaches employ III-V semiconductor technologies, plasmonics is emerging as a potential solution ...
Tobias Blatter, Stefan M. Koepfli, Amane Zuerrer, Samuel Hess, Yannik Horst, Marcel Destraz, Daniel Rieben, Michael Baumann, Laurenz Kulmer, Jasmin Smajic, Yuriy Fedoryshyn, Juerg Leuthold   +11 more
doaj   +1 more source

Compact and ultra-efficient broadband plasmonic terahertz field detector

Nature Communications, 2019
Most efficient terahertz detection schemes rely on complex free space optics and require high-power lasers. Here, the authors report an integrated plasmonic terahertz detector on a silicon photonics platform, with 2.5 THz bandwidth and a 65 dB dynamical ...
Yannick Salamin, Ileana-Cristina Benea-Chelmus, Yuriy Fedoryshyn, Wolfgang Heni, Delwin L. Elder, Larry R. Dalton, Jérôme Faist, Juerg Leuthold   +7 more
doaj   +1 more source

Electrodynamics in accelerated frames revisited

, 2010
Maxwell's equations are formulated in arbitrary moving frames by means of tetrad fields, which are interpreted as reference frames adapted to observers in space-time.
Anderson, Boulware, de Almeida, Eriksen, Kovetz, Maluf, Maluf, Mashhoon, Mashhoon, Mashhoon   +9 more
core   +1 more source

Exploring Microstructure–Physical Property–Corrosion Response Relationship in Intermetallic Compounds of Al‐Cu Bimetallic Interfaces

Advanced Engineering Materials, EarlyView.
Al‐Cu intermetallic compounds (IMCs) have a significant influence on the properties of Al‐Cu bimetallic interfaces formed in compound casting. This article provides a deeper understanding of microstructure, crystallography, thermal properties, hardness, and corrosion response of Al‐Cu IMCs with the goal of facilitating the optimization of the ...
Alireza Nazarahari, Tatiana Blank, Christian Hinte, Huseyin Can Ozdemir, Khemais Barienti, Christian Klose, Dermican Canadinc, Hans Jürgen Maier   +7 more
wiley   +1 more source

Recent Advancements in Bulk Processing of Rare‐Earth‐Free Hard Magnetic Materials and Related Multiscale Simulations

Advanced Engineering Materials, EarlyView.
This article provides an overview of recent advancements in bulk processing of rare‐earth‐free hard magnetic materials. It also addresses related simulation approaches at different scales. The research on rare‐earth‐free magnetic materials has increased significantly in recent years, driven by supply chain issues, environmental and social concerns, and
Daniel Scheiber, Andrea Bachmaier
wiley   +1 more source

Restoring the encoding properties of a stochastic neuron model by an exogenous noise

Frontiers in Computational Neuroscience, 2015
Here we evaluate the possibility of improving the encoding properties of an impaired neuronal system by superimposing an exogenous noise to an external electric stimulation signal. The approach is based on the use of mathematical neuron models consisting
Alessandra ePaffi, Alessandra ePaffi, Francesca eCamera, Francesca eCamera, Francesca eApollonio, Francesca eApollonio, Guglielmo ed'Inzeo, Guglielmo ed'Inzeo, Micaela eLiberti, Micaela eLiberti   +9 more
doaj   +1 more source

Analysis of the Possibility of Using Various Time-Frequency Transformation Methods to Barkhausen Noise Characterization for the Need of Magnetic Anisotropy Evaluation in Steels

Applied Sciences, 2021
Magnetic Barkhausen Noise (MBN) is a method being currently considered by many research and development centers, as it provides knowledge about the properties and current state of the examined material.
Michal Maciusowicz, Grzegorz Psuj
doaj   +1 more source