Results 31 to 40 of about 6,312,933 (292)

Dielectric properties of materials for 3D printing at high frequencies

open access: yesResearch in Agricultural Engineering, 2023
3D printing is widely used method. In the term of developing of components for electronic devices, it is important to provide the good physical properties of the used dielectric.
Tomáš Pícha, Stanislava Papežová
doaj   +1 more source

Study on Stator and Rotor Coupling of Positive Displacement Motor

open access: yesShiyou jixie, 2022
The application of high-filled stator rubber and the improvement of rotor surface treatment quality greatly extend the service life of positive displacement motor(PDM).In order to enhance the coordination of high-filled PDM,the kinematic model of stator ...
Zhang Honglin   +5 more
doaj  

Magnesium Oxide Nanoparticles: Dielectric Properties, Surface Functionalization and Improvement of Epoxy-Based Composites Insulating Properties

open access: yesNanomaterials, 2018
Composite insulation materials are an inseparable part of numerous electrical devices because of synergy effect between their individual parts. One of the main aims of the presented study is an introduction of the dielectric properties of nanoscale ...
Jaroslav Hornak   +7 more
doaj   +1 more source

Finite element modeling for predicting sound insulation of fixed windows in a laboratory environment

open access: yesFrontiers in Built Environment, 2022
This paper presents discussion of the prediction capability of three numerical models using finite element method for predicting the sound reduction index (SRI) of fixed windows having different dimensions in a laboratory environment. The three numerical
Marie Mimura   +3 more
doaj   +1 more source

Characteristics of Generic Dielectric Materials and Char as Bed Materials of a Dielectric Barrier Discharge Reactor under High Temperature and Wide Frequency Range

open access: yesEnergies, 2022
This paper investigates the characteristics of generic dielectric materials and char, which are intended to be used as the fixed bed materials of a non-thermal-plasma (NTP)-based dielectric barrier discharge (DBD) reactor.
Saravanakumar Arumugam   +3 more
doaj   +1 more source

Electromechanical Equivalent Circuit Model of a Piezoelectric Disk Considering Three Internal Losses

open access: yesIEEE Access, 2020
Heat generation by internal loss factors of piezoelectrics is one of the critical issues for high power density piezoelectric applications, such as ultrasonic motors, piezoelectric actuators and transducers.
Xiaoxiao Dong   +5 more
doaj   +1 more source

Damping Behavior of Thermoplastic Organic Sheets with Continuous Natural Fiber-Reinforcement

open access: yesVibration, 2021
In the field of lightweight construction, the use of natural fibers as reinforcement in composites has been increasingly discussed. Additionally, the damping properties of natural fibers are known from fiber materials such as fiber insulation boards.
Martin Dannemann   +4 more
doaj   +1 more source

Study of the effect of specimen size and frequency on the structural damping property of beam

open access: yesMechanical Engineering Journal, 2016
It is said that the parameters that characterize structural damping, i.e., the loss factor, are identical to the material of the specimen, but in actuality, the damping property is sometimes affected by specimen size or the frequency.
Shozo KAWAMURA   +3 more
doaj   +1 more source

Analysis of space charge and charge trap characteristics of gamma irradiated silicone rubber nanocomposites

open access: yesIET Nanodielectrics, 2020
Silicone rubber is widely used for electrical insulation and may be exposed to a harsh environment. The present study envisaged to improve insulation properties of silicone rubber by adding an optimised quantity of nanofillers.
Baskar Thangabalan   +3 more
doaj   +1 more source

Association of Nutritional Factors with Hearing Loss [PDF]

open access: yesNutrients, 2019
Hearing loss (HL) is a major public health problem. Nutritional factors can affect a variety of diseases, such as HL, in humans. Thus far, several studies have evaluated the association between nutrition and hearing. These studies found that the incidence of HL was increased with the lack of single micro-nutrients such as vitamins A, B, C, D and E, and
Su Young Jung   +2 more
openaire   +2 more sources

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