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Achieving a Porous PDMS Film for Passive Cooling through the Utilization of Ultrafine NaCl Sacrificial Templates.
ACS Omega
January 2025
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Precision Machinery and Instrumentation, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
Passive radiative cooling technology serves as an energy-free alternative to traditional cooling systems. Porous polymer structures are frequently employed for radiative cooling by leveraging the refractive index mismatch between the polymer and the pores, enabling the scattering of incoming sunlight. Recently, water-soluble and readily available Sodium chloride (NaCl) particles have been utilized as sacrificial templates for sustainable pore creation.
View Article and Find Full Text PDFCharacterisation at Cryogenic Temperatures of an Attenuator for an Application of Astrophysical Instrumentation with MKIDs.
Sensors (Basel)
December 2024
Laboratorio de Circuitos Integrados (LABIC), Departamento de Electrónica, Área de Instrumentación, Instituto de Astrofísica de Canarias (IAC), 38205 La Laguna, Tenerife, Spain.
The use of non-cryogenic certified commercial electronics for cryogenic applications may be attractive due to their cost and availability, but it also carries risks related to reliability, performance and thermal compatibility. The decision to use commercial components that are not certified for cryogenics instead of components specifically designed for such applications must be carefully weighed based on specific project needs and risk tolerances. This work presents the characterisation of an attenuator circuit at cryogenic temperatures used in a microwave kinetic inductance detector (MKID) readout system.
View Article and Find Full Text PDFTransformations in the Ti-6Al-4V Alloy Studied Using Dilatometry Supported by Acoustic Emission.
Materials (Basel)
December 2024
Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawińskiego 5B, 02-103 Warszawa, Poland.
This paper presents the results of research on the kinetics of transformations in the two-phase (α + β) Ti-6Al-4V alloy. The transformation start and end temperatures during heating at different rates were determined using a dilatometer. A modified dilatometer was employed, equipped with an acoustic emission measurement apparatus and software enabling the assessment of sample dimensional changes during heating and cooling.
View Article and Find Full Text PDFProactive esophageal cooling during radiofrequency cardiac ablation: data update including applications in very high-power short duration ablation.
Expert Rev Med Devices
January 2025
Cardiac Electrophysiology, NorthShore University Health System, Evanston, IL, USA.
Introduction: Proactive esophageal cooling reduces injury during radiofrequency (RF) ablation of the left atrium (LA) for the treatment of atrial fibrillation (AF). New catheters are capable of higher wattage settings up to 90 W (very high-power short duration, vHPSD) for 4 s. Varying power and duration, however, does not eliminate the risk of thermal injury.
View Article and Find Full Text PDFStudy on the Preparation and Test Method of Transformer Oil Used in Laboratory.
Materials (Basel)
December 2024
Key Laboratory of Ultra-Weak Magnetic Field Measurement Technology, Ministry of Education, School of Instrumentation Science and Optoelectronics Engineering, Beihang University, Beijing 100191, China.
The power transformer is one of the most important parts of a power system. The transformer oil in a transformer not only increases its insulation strength, but also helps its cooling. Cellulose particles are one of the main factors affecting the breakdown characteristics of transformer oil, and the withstand voltage test can effectively detect the quality of transformer oil.
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