Results 31 to 40 of about 7,881 (155)

A Test Method for Acoustic Emission Properties of Natural Cellulose Fiber-Reinforced Composites

open access: yesApplied Sciences, 2021
To test the acoustic performance of fiber-reinforced composites for replacing wood, an acoustic vibration test method is developed. For evaluation of the test method, composites are manufactured using hemp and ramie embedded in epoxy, through vacuum ...
Fanxizi Liu   +5 more
doaj   +1 more source

Investigations on the Performance of Various Horizontal Ground Electrodes

open access: yesEnergies, 2021
Experimental work on grounding systems has shown that the characteristics of grounding systems under high impulse conditions are different than those obtained at steady-state conditions.
Hanis Hamizah Hizamul-Din   +4 more
doaj   +1 more source

Pulmonary Functions and Inflammatory Biomarkers in Post-Pulmonary Tuberculosis Sequelae [PDF]

open access: yesTuberculosis and Respiratory Diseases, 2022
Background Post-tuberculosis (TB) sequelae is a commonly encountered clinical entity, especially in high TB burden countries. This may represent chronic anatomic sequelae of previously treated TB, with frequent symptomatic presentation.
Kumar Shanmugasundaram   +3 more
doaj   +1 more source

Response of Drone Electronic Systems to a Standardized Lightning Pulse

open access: yesEnergies, 2021
This paper presents the results of experimental tests of the impulse response of selected, essential components of a drone. A standardized lightning pulse that is often used during immunity tests of electronic devices in the aviation industry was applied.
Paweł Szczupak, Tomasz Kossowski
doaj   +1 more source

Impulse Characteristics of Soil Treated with Enhancement Materials and Various Moisture Contents

open access: yesApplied Sciences
Due to the high mineral contents of additives and enhancement materials (EMs), EMs have become popular in treating soil, which expectedly improves the electrical characteristics of soil.
Usman Muhammad   +2 more
doaj   +1 more source

Effect of Enhancement Material on the Performance of Ground Electrodes Under Impulse Conditions

open access: yesIEEE Access
Among the factors that affect the soil resistivity is the chemical content in soil, where the ionic conduction is expectedly increased and the soil resistivity is reduced.
Usman Muhammad   +3 more
doaj   +1 more source

Estimation of Effective Length of Type-A Grounding System According to IEC 62305-3 Using a Machine Learning Regression Model

open access: yesApplied Sciences
Two types of grounding systems are recommended for use in the international standard IEC 62305-3, Part 3: Physical damage to structures and life hazard.
Dino Lovrić   +2 more
doaj   +1 more source

Active-Support Integrated Control Method for Renewable Energy Generation Voltage Source Converters

open access: yesFrontiers in Energy Research, 2022
Aiming at the grid connection stability of renewable energy generation Voltage Source Converters (VSCs), an active support integrated control strategy is proposed in this article.
Chu Tianfeng   +6 more
doaj   +1 more source

Application of Impulse Response Characteristics in Rail-ground Transition Resistance Measurement

open access: yesChengshi guidao jiaotong yanjiu
Objective The stray current harm in urban rail transit lines is increasingly non-ignorable. Stray current is not easy to be detected, and the amount of the rail-ground transition resistance is a crucial factor affecting stray current.
CAO Xiaobin   +5 more
doaj   +1 more source

Dynamic impedance model of the skin-electrode interface for transcutaneous electrical stimulation. [PDF]

open access: yesPLoS ONE, 2015
Transcutaneous electrical stimulation can depolarize nerve or muscle cells applying impulses through electrodes attached on the skin. For these applications, the electrode-skin impedance is an important factor which influences effectiveness.
José Luis Vargas Luna   +3 more
doaj   +1 more source

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