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Microwave Surface and Lamb Waves in a Thin Diamond Plate: Experimental and Theoretical Investigation.
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January 2025
Federal State Budgetary Institution , Technological Institute for Superhard and Novel Carbon Materials of National Research Centre, Kurchatov Institute, 108840 Moscow, Troitsk, Russian Federation.
Microwave surface and Lamb waves in a multilayered piezoelectric "Al-IDT/(AlSc)N/(001)[110] diamond" structure designed as a SAW resonator were studied using both the experimental and modeling methods. In this structure, it is possible to generate Rayleigh, surface horizontal (SH) and Lamb waves simultaneously. The successful excitation of Lamb waves at operating frequencies up to 20 GHz has been obtained.
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School of Mechanical Engineering and Rail Transit, Changzhou University, Changzhou 213164, China.
This study analyzes the impact of slip-dependent zeta potential on the heat transfer characteristics of nanofluids in cylindrical microchannels with consideration of thermal radiation effects. An analytical model is developed, accounting for the coupling between surface potential and interfacial slip. The linearized Poisson-Boltzmann equation, along with the momentum and energy conservation equations, is solved analytically to obtain the electrical potential field, velocity field, temperature distribution, and Nusselt number for both slip-dependent (SD) and slip-independent (SI) zeta potentials.
View Article and Find Full Text PDFPenetrating Orbital Injury: A Narrative Review for Emergency Clinicians.
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Emergency Department, CHU UCL Namur, 5530 Yvoir, Belgium.
Penetrating orbit injury is a rare but complex and life-threatening occurrence that may easily be overlooked. Management in the emergency department requires an early multidisciplinary approach but still lacks standard guidelines. This narrative review aims to provide a systematic approach to the management of penetrating orbital injuries for emergency clinicians.
View Article and Find Full Text PDFMeasurement of pressure dependent variations in local pulse wave velocity within a cardiac cycle from forward travelling pulse waves.
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Healthcare Technology Innovation Centre, Indian Institute of Technology Madras, Chennai, India.
The local pulse wave velocity (PWV) from large elastic arteries and its pressure-dependent changes within a cardiac cycle are potential biomarkers for cardiovascular risk stratification. However, pulse wave reflections can impair the accuracy of local PWV measurements. We propose a method to measure pressure-dependent variations in local PWV while minimizing the influence of pulse wave reflections.
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Bakulev National Medical Research Center for Cardiovascular Surgery, Moscow, Russia.
The study presents a numerical parametric investigation of flow structures in channels with a longitudinal-radial profile zR = Const and a spherical dome at the base. The goal of the study was to examine the flow structures in these channels depending on the exponent N of the profile and the height of the dome, to determine the conditions that provide optimal centripetal swirling flow, analogous to blood flow in the heart chambers and major vessels. The investigation was conducted using a comparative analysis of flow structures in channel configurations zR = Const, carried out in two stages.
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