Results 41 to 50 of about 1,158,555 (111)

The pH dependence of spectral induced polarization of silica sands: Experiment and modeling

open access: yes, 2011
In electrolyte‐saturated sands, the storage of electrical charges under an alternating electrical field (called “induced polarization”) is responsible for a phase lag between the applied current and the resulting electrical field.
M. Skold   +3 more
semanticscholar   +1 more source

Gallium Nitride FET Model [PDF]

open access: yesIOP Conf. Ser.: Mater. Sci. Eng. 475 012007 2019, 2019
We have presented an analytical physics-based compact model of GaN power FET, which can accurately describe the I-V characteristics in all operation modes. The model considers the source-drain resistance, different interface trap densities and self-heating effects.
arxiv   +1 more source

Characterisation of Cryogenic Material Properties of 3D-Printed Superconducting Niobium using a 3D Lumped Element Microwave Cavity

open access: yes, 2020
We present an experimental characterisation of the electrical properties of 3D-printed Niobium. The study was performed by inserting a 3D-printed Nb post inside an Aluminium cylindrical cavity, forming a 3D lumped element re-entrant microwave cavity ...
Bourhill, Jeremy   +5 more
core  

Atmospheric Chemistry and Physics

open access: yes, 2001
European scale harmonized monitoring of atmospheric composition was initiated in the early 1970s, and the activity has generated a comprehensive dataset (available at http://www.emep.int) which allows the evaluation of regional and spatial trends of air ...
K. Tørseth   +15 more
semanticscholar   +1 more source

Programmable Multifuctional Photonics ICs [PDF]

open access: yesPaper presented at 2018 IEEE Photonics in switching conference, Cyprus, 2019
Here, we review present and future work in the next photonic IC generation aiming at integration of multi-functional software-defined systems for signal processing operations.
arxiv  

The European Integrated Tokamak Modelling (ITM) effort: achievements and first physics results

open access: yes, 2014
A selection of achievements and first physics results are presented of the European Integrated Tokamak Modelling Task Force (EFDA ITM-TF) simulation framework, which aims to provide a standardized platform and an integrated modelling suite of validated ...
G. Falchetto   +41 more
semanticscholar   +1 more source

Machine learning-based Raman amplifier design [PDF]

open access: yesarXiv, 2018
A multi-layer neural network is employed to learn the mapping between Raman gain profile and pump powers and wavelengths. The learned model predicts with high-accuracy, low-latency and low-complexity the pumping setup for any gain profile.
arxiv  

Preisach Based Storage Devices and Global Optimizers [PDF]

open access: yesarXiv, 2019
The Preisach model of hysteresis admits simple device realizations. It is suggested in the paper that these realizations can be utilized as unique data storage devices as well as analog global optimizers.
arxiv  

in situ Monitoring of Lithium Electrodeposition using Transient Grating Spectroscopy

open access: yes, 2023
The mechanisms of lithium electrodeposition, which overwhelmingly affect lithium metal battery performance and safety, remain insufficiently understood due to its electrochemical complexity.
Liao, Bolin   +5 more
core  

Photoemission study and band alignment of GaN passivation layers on GaInP heterointerface

open access: yes, 2023
III-V semiconductor-based photoelectrochemical (PEC) devices show the highest solar-to-electricity or solar-to-fuel conversion efficiencies. GaInP is a relevant top photoabsorber layer or a charge-selective contact in PEC for integrated and direct solar ...
Hannappel, T.   +8 more
core  

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