Results 21 to 30 of about 403,177 (368)

How Do Surface Polar Molecules Contribute to High Open‐Circuit Voltage in Perovskite Solar Cells?

open access: yesAdvanced Science, 2023
To date, the improvement of open‐circuit voltage (VOC) offers a breakthrough for the performance of perovskite solar cells (PSCs) toward their theoretical limit. Surface modification through organic ammonium halide salts (e.g., phenethylammonium ions PEA+
Yinyi Ma   +8 more
doaj   +1 more source

Predicting molecular dipole moments by combining atomic partial charges and atomic dipoles. [PDF]

open access: yesJournal of Chemical Physics, 2020
The molecular dipole moment (μ) is a central quantity in chemistry. It is essential in predicting infrared and sum-frequency generation spectra as well as induction and long-range electrostatic interactions.
M. Veit   +4 more
semanticscholar   +1 more source

Dipole: Diagnosis Prediction in Healthcare via Attention-based Bidirectional Recurrent Neural Networks [PDF]

open access: yesKnowledge Discovery and Data Mining, 2017
Predicting the future health information of patients from the historical Electronic Health Records (EHR) is a core research task in the development of personalized healthcare.
Fenglong Ma   +5 more
semanticscholar   +1 more source

MATHEMATICAL APPARATUS FOR MODELING OF THE PROPAGATION THE MAGNETIC FIELD ELECTRIC MACHINES WITH A GIVEN ACCURACY

open access: yesСучасні інформаційні системи, 2022
. The problem of modeling the propagation local magnetic fields and spatially dispersed sources is large errors compared to field measurements. An important aspect of adequate modeling is the use of the correct mathematical apparatus.
Larysa Levchenko   +2 more
doaj   +1 more source

Ergodicity Breaking Arising from Hilbert Space Fragmentation in Dipole-Conserving Hamiltonians [PDF]

open access: yesPhysical Review X, 2019
We show that the combination of charge and dipole conservation---characteristic of fracton systems---leads to an extensive fragmentation of the Hilbert space, which in turn can lead to a breakdown of thermalization.
Pablo Sala   +4 more
semanticscholar   +1 more source

Fully Planar Dual-Polarized Broadband Antenna for 3G, 4G and Sub 6-GHz 5G Base Stations

open access: yesIEEE Access, 2020
A fully planar dual polarized radiating element with internal embedded coupled dipoles is presented in this paper. The inclusion of these elements allows achieving three different goals: firstly, an extension of the bandwidth towards lower frequencies ...
Sergio Martin-Anton   +1 more
doaj   +1 more source

Compact, Broadband, and Omnidirectional Antenna Array for Millimeter-Wave Communication Systems

open access: yesJournal of Microwaves, Optoelectronics and Electromagnetic Applications, 2021
In this paper, a millimeter-wave printed quadrupole antenna is proposed. It consists of two symmetric printed dipoles that make the quadrupole radiating power omnidirectionally.
Yuanzhi Liu, Mustapha C. E. Yagoub
doaj   +1 more source

Reflectarray Design Using a Discrete Dipole Framework

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
We propose and numerically validate a patch reflectarray modeling approach suitable for small patches that describes each patch as a pair of polarizable magnetic dipoles.
Aaron V. Diebold   +3 more
doaj   +1 more source

Effect of Bandage Materials on Epidermal Antenna

open access: yesEngineering Proceedings, 2023
This study explores the effect of different types of bandages on the performance of an epidermal antenna. Three identical dipole antennas are designed on three different types of bandages, and the measured reflection coefficients, S11, show that the ...
Irfan Ullah   +3 more
doaj   +1 more source

A transparent robust quasi‐isotropic circularly polarized antenna for Cub‐Sat and outdoor wireless

open access: yesEngineering Reports, 2020
In this article, a highly robust antenna is proposed for omnidirectional circular polarized communications in harsh environments at 2.45 GHz industrial, scientific, and medical frequency band.
Mansoor Dashti Ardakani   +1 more
doaj   +1 more source

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