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Influence of the Transducer-Mounting Method on the Radiation Performance of Acoustic Sources Used in Monopole Acoustic Logging While Drilling.
Sensors (Basel)
January 2025
State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China.
Transducers used in acoustic logging while drilling (ALWD) must be mounted on a drill collar, and their radiation performance is dependent on the employed mounting method. Herein, the complex transmitting voltage response of a while-drilling (WD) monopole acoustic source was calculated through finite-element harmonic-response analysis. Subsequently, the acoustic pressure waveform radiated by the source driven by a half-sine excitation voltage signal was calculated using the complex transmitting voltage response.
View Article and Find Full Text PDFThe Formulation and Evaluation of Customized Prednisolone Gel Tablets Prepared by an Automated Extrusion-Based Material Deposition Method.
Pharmaceutics
November 2024
Faculty of Medicine, Institute of Pharmacy, University of Tartu, Nooruse 1, 50411 Tartu, Estonia.
: An automated extrusion-based material deposition is a contemporary and rapid method for pharmaceutical dose-dispensing and preparing (printing) individualized solid dosage forms. The aim of this study was to investigate and gain knowledge of the feasibility of automated extrusion-based material deposition technology in preparing customized prednisolone (PRD)-loaded gel tablets for veterinary applications (primarily for dogs and cats). : The PRD loads of the extrusion-based deposited gel tablets were 0.
View Article and Find Full Text PDFKaolinite induces rapid authigenic mineralisation in unburied shrimps.
Commun Earth Environ
January 2025
Institute of Earth Sciences, University of Lausanne, Géopolis, Lausanne, CH-1015 Switzerland.
Fossils preserving soft tissues and lightly biomineralized structures are essential for the reconstruction of past ecosystems and their evolution. Understanding fossilization processes, including decay and mineralisation, is crucial for accurately interpreting ancient morphologies. Here we investigate the decay of marine and freshwater shrimps deposited on the surface of three different clay beds.
View Article and Find Full Text PDFEfficient Electrosynthesis of Hydrogen Peroxide Enabled by a Hierarchical Hollow RE-P-O (RE = Sm, La, Gd) Architecture with Open Channels.
Adv Mater
January 2025
Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, 199 Ren'ai Road, Suzhou, Jiangsu, 215123, China.
The electrochemical two-electron oxygen reduction reaction (2e ORR) offers a sustainable pathway for the production of HO; however, the development of electrocatalysts with exceptional activity, selectivity, and long-term stability remains a challenging task. Herein, a novel approach is presented to addressing this challenge by synthesizing hierarchical hollow SmPO nanospheres with open channels via a two-step hydrothermal treatment. The produced compound demonstrates remarkable 2e selectivity, exceeding 93% across a wide potential range of 0.
View Article and Find Full Text PDFSoft Metalens for Broadband Ultrasonic Focusing through Aberration Layers.
Nat Commun
January 2025
Key Laboratory of Underwater Acoustic Communication and Marine Information Technology of the Ministry of Education, College of Ocean and Earth Sciences, Xiamen University, Xiamen, China.
Aberration layers (AL) often present significant energy transmission barriers in microwave engineering, electromagnetic waves, and medical ultrasound. However, achieving broadband ultrasonic focusing through aberration layers like the human skull using conventional materials such as metals and elastomers has proven challenging. In this study, we introduce an inverse phase encoding method employing tunable soft metalens to penetrate heterogeneous aberration layers.
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