Results 21 to 30 of about 84,533 (300)

Entrance skin dose of the thyroid gland area following exposure with different protocols of two panoramic and cone-beam computed tomography devices

open access: yesJournal of Oral and Maxillofacial Radiology, 2019
Background: Cone-beam computed tomography (CBCT) has gained considerable use, while radiation burden remains an important concern. Aims: This study aimed at determining the entrance skin dose of the thyroid gland area through exposure with the normal ...
Bardia Vadiati Saberi   +5 more
doaj   +1 more source

Delocalized nonlinear vibrational modes and their effect on the properties of binary NiTi alloy [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика
The purpose of this work is to investigate the behavior of stable one-component delocalized nonlinear vibrational modes in simple cubic titanium and nickel sublattices, as well as their influence on the properties of the binary NiTi alloy. Methods.
Bachurin , Dmitry Vladimirovich   +1 more
doaj   +1 more source

Identification and influence factors analysis of blade crack mistuning in hard-coated blisk based on modified component mode mistuning reduced-order model

open access: yesJournal of Low Frequency Noise, Vibration and Active Control, 2021
Blade crack will cause severe mistuning of hard-coated blisks, which will lead to vibration localization. To identify crack mistuning and analyze influence factors, in this study, a mistuning identification method of blade cracks in hard-coated blisks is
Kunpeng Xu   +3 more
doaj   +1 more source

The Modular Circuitry of Apicomplexan Cell Division Plasticity

open access: yesFrontiers in Cellular and Infection Microbiology, 2021
The close-knit group of apicomplexan parasites displays a wide variety of cell division modes, which differ between parasites as well as between different life stages within a single parasite species. The beginning and endpoint of the asexual replication
Marc-Jan Gubbels   +4 more
doaj   +1 more source

The acoustics of curved and lined cylindrical ducts with mean flow

open access: yes, 2010
This thesis considers linear perturbations to the steady flow of a compressible inviscid perfect gas along a cylindrical or annular duct. Particular consideration is given to the model of the duct boundary, and to the effect of curvature of the duct ...

core   +1 more source

Nanocomposite oxide and nitride hard coatings produced by pulse magnetron sputtering

open access: yes, 2022
S.760-764In this work, the composition and the microstructure of two-phase hard coatings have been varied by reactive pulsed co-sputtering of two target materials to produce nanocomposite structures.
Klostermann, H.   +4 more
core   +1 more source

Enhanced photoluminescence extraction efficiency from a diamond photonic crystal via leaky modes [PDF]

open access: yes, 2011
Two-dimensional photonic crystal can be exploited as the top part of a light source in order to increase its extraction efficiency. Here, we report on the room-temperature intrinsic photoluminescence (PL) behavior of a nanocrystalline diamond (NCD) layer
Ondič, L.   +26 more
core   +1 more source

Hard excitation mode of a system with optomechanical instability

open access: yesOptics Letters
Systems with strong photon–phonon interaction and optomechanical instability are perspective for the generation of coherent phonons and photons. We predict the existence of a hard mode of excitation in such systems when a jump-like increase in the photon intensity takes place at the generation threshold.
Mukhamedyanov, Artem   +2 more
openaire   +3 more sources

BroadBand-Adaptive VMD with Flattest Response

open access: yesMathematics, 2023
A mixed signal with several unknown modes is common in the industry and is hard to decompose. Variational Mode Decomposition (VMD) was proposed to decompose a signal into several amplitude-modulated modes in 2014, which overcame the limitations of ...
Xizhong Shen, Ran Li
doaj   +1 more source

THE "RESONANCE–ANTIRESONANCE" METHOD FOR DETERMINING THE ELECTROPHYSICAL PARAMETERS OF PIEZOELECTRICS

open access: yesИзмерение, мониторинг, управление, контроль, 2022
Background. Piezoelectric materials are promising for use in sensors, for monitoring dynamic processes as primary information converters of measuring and control systems.
А.E. Zhurina   +3 more
doaj   +1 more source

Home - About - Disclaimer - Privacy