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http://dx.doi.org/10.1002/ppul.26553 | DOI Listing |
ACS Omega
February 2024
School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China.
The structure of coal seam fractures is the main physical property of coalbed methane reservoir evaluation, and the complex resistivity method is a potential geophysical evaluation method for coal seam fractures. In this study, cylindrical coal samples with axial directions perpendicular to the bedding, face cleat, and butt cleat were prepared. The complex electrical parameters of the loaded specimens were tested with test frequencies ranging from 1 Hz to 10 kHz.
View Article and Find Full Text PDFJ Asthma
September 2024
Clínica MEDS, Santiago, Chile.
Introduction: Reactance inversion (RI) has been associated with impaired peripheral airway function in persistent asthma. However, there is little to no data about the difference between asthmatic children with and without RI. This study aimed to detect clinical and lung function differences in moderate-severe asthmatic children with and without RI.
View Article and Find Full Text PDFSensors (Basel)
October 2023
Department of Civil Engineering, University of California, 725 Davis Hall, Berkeley, CA 94720, USA.
Recent advances in embedded antenna and sensor technologies for 5G communications have galvanized a response toward the investigation of their electromagnetic performance for urban contexts and civil engineering applications. This article quantitatively investigates the effects of material loading on an evolved antecedent hexagonal complementary split-ring resonator (CSRR)-loaded antenna design through simulation and experimentation. Optimization of the narrowband antenna system was first performed in a simulation environment to achieve resonance at 3.
View Article and Find Full Text PDFPediatr Pulmonol
September 2023
Division of Pulmonary and Sleep Medicine, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
J Asthma
August 2022
Department of Pediatric Pulmonology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile.
Background: Small airway dysfunction (SAD) in asthma can be measured by impulse oscillometry (IOS). Usually, the reactance should decrease with decreases in frequency oscillation. Sometimes an upward shift of the curve at low frequencies can be observed together with lower than expected reactance values.
View Article and Find Full Text PDF