Results 11 to 20 of about 36,513 (258)

Hybrid Metasurfaces for Perfect Transmission and Customized Manipulation of Sound Across Water–Air Interface

open access: yesAdvanced Science, 2023
Extreme impedance mismatch causes sound insulation at water–air interfaces, limiting numerous cross‐media applications such as ocean‐air wireless acoustic communication.
Hong‐Tao Zhou   +5 more
doaj   +1 more source

The Influence of Impedance and Enhancement Factors of Discharge Planning Implementation at Hospital: A Systematic Review

open access: yesJurnal Ners, 2020
Introduction: Discharge Planning is one of various nursing duty agendas, starting from when patients are admitted to hospital up to being allowed to go home.
Hari Soebagiyo   +2 more
doaj   +1 more source

An Impedance-based Parameter Design Method for Active Damping of Load Converter Station in MTDC Distribution System

open access: yesJournal of Modern Power Systems and Clean Energy, 2022
To achieve the efficient application of impedance analysis in the stability assessment and enhancement of multi-terminal DC distribution systems, this paper proposes the DC-side reduced-order impedance models with power control and AC voltage control ...
Pengwei Chen   +3 more
doaj   +1 more source

An image-enhancement technique for electrical impedance tomography [PDF]

open access: yesInverse Problems, 1994
Summary: We propose an idea for reconstructing `blocky' conductivity profiles in electrical impedance tomography. By `blocky' profiles, we mean functions that are piecewise constant, and hence have sharply defined edges. The method is based on selecting a conductivity distribution that has the least total variation from all conductivities that are ...
Dobson, David C., Santosa, Fadil
openaire   +1 more source

Diagnosis Enhances, Not Impedes, Boundaries of Physical Therapy Practice [PDF]

open access: yesJournal of Orthopaedic & Sports Physical Therapy, 1991
Boissonnault and Bass (1-3) contribute an excellent and stimulating description of several "red flag" conditions that should alert physical therapists (PTs) to the presence of nonmechanical sources of pain. They provide an important reminder that pain has many etiologies, and that despite physician referral, patients may have visceral pathologies whose
D, Wolf, M E, Katz, D E, Krebs
openaire   +2 more sources

Tunable microwave plasma coaxial resonator

open access: yesAIP Advances, 2021
We report the design, performance, and characterization of a tunable microwave plasma resonator based on a coaxial transmission line structure operated at atmospheric pressure.
Jimo Lee, Gunsu S. Yun
doaj   +1 more source

A new design of 5G planar antenna with enhancement of the bandwidth and the gain using metasurface [PDF]

open access: yesE3S Web of Conferences, 2022
This work presents and describes the design of a novel multilayer antenna structure based on metasurfaces for 5G mobile applications. The suggested antenna has good matching input impedance around 28 GHz, a bandwidth of 2.2 GHz, and an enhancement of ...
Bellekhiri Abderrahim   +3 more
doaj   +1 more source

Design and optimization of pi-slotted dual-band rectangular microstrip patch antenna using surface response methodology for 5G applications

open access: yesHeliyon, 2022
Modern wireless network antenna technologies are designed to meet the ever-increasing needs of emerging applications. Hence this paper investigates potential antenna impedance bandwidth performance enhancement techniques based on optimizing independent ...
Lijaddis Getnet Ayalew   +1 more
doaj   +1 more source

Dopamine monomer functionalized Ti3C2 nanosheets and their anticorrosion improvement for waterborne epoxy coatings

open access: yesJournal of Materials Research and Technology, 2022
MXene is becoming more and more active in the field of anticorrosion coatings. In this work, Ti3C2 nanosheets were modified with dopamine monomer and then introduced into waterborne epoxy coatings (EP). Composite coatings with unmodified Ti3C2 nanosheets
Xiaomeng Li, Shuxue Zhou
doaj   +1 more source

DC‐link capacitor current observation based stability enhancement control for back‐to‐back converter

open access: yesIET Power Electronics, 2022
This article presents a stability enhancement control scheme applied in the three‐phase back‐to‐back (BTB) converters with L filter. The stability enhancement control scheme is concocted using the feedback of DC‐link capacitor current without additional ...
Yuxia Jiang, Yanjun Tian, Yonggang Li
doaj   +1 more source

Home - About - Disclaimer - Privacy