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A New Self-Made 16-Channel Capacitive Electrocardiography System: An Investigation and Validation for Non-Contact Electrodes.
Sensors (Basel)
January 2025
CAS Center for Excellence in Superconducting Electronics (CENSE), Shanghai Institute of Microsystem and Information Technology (SIMIT), Chinese Academy of Sciences, Shanghai 200050, China.
Generally, the electrocardiography (ECG) system plays an important role in preventing and diagnosing heart diseases. To further improve the amenity and convenience of using an ECG system, we built a customized capacitive electrocardiography (cECG) system with one wet electrode, sixteen non-contact electrodes, two ADS1299 chips, and one STM32F303-based microcontroller unit (MCU). This new cECG system could acquire, save, and display the ECG data in real time.
View Article and Find Full Text PDFSOFCs integrated with SMES under dynamic power control using Chernobyl disaster optimizer.
Sci Rep
January 2025
Department of Electrical Engineering, Faculty of Engineering, Mansoura University, Mansoura, Egypt.
The current study uses the Chernobyl disaster optimizer (CDO), a new metaheuristic optimizer, to identify the seven unknown parameters of solid oxide fuel cells (SOFCs). The procedures of the CDO is based on physical behavior of the elaborated radiations from the well-known Chernobyl disaster according to their mass, speed, frequency, and degree of ionization. The sum of square errors (SMSE) among the estimated and the real measured output voltage datasets of SOFCs is minimized employing the CDO.
View Article and Find Full Text PDFThermoelectric properties of a quantum dot attached to normal metal and topological superconductor.
Sci Rep
January 2025
Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille, France.
The thermoelectric properties of hybrid systems based on a single-level quantum dot coupled to a normal-metal/half-metallic lead and attached to a topological superconductor wire are investigated. The topological superconductor wire is modeled by a spinless p-wave superconductor which hosts both a Majorana bound state at its extremity and above gap quasiparticle excitations. The main interest of our investigation is to study the interplay of sub-gap and single-particle tunneling processes and their contributions to the thermoelectric response of the considered system.
View Article and Find Full Text PDFElf autoencoder for unsupervised exploration of flat-band materials using electronic band structure fingerprints.
Commun Phys
January 2025
Department of Physics and Astronomy, the University of Manchester, Manchester, UK.
Two-dimensional materials with flat electronic bands are promising for realising exotic quantum phenomena such as unconventional superconductivity and nontrivial topology. However, exploring their vast chemical space is a significant challenge. Here we introduce elf, an unsupervised convolutional autoencoder that encodes electronic band structure images into fingerprint vectors, enabling the autonomous clustering of materials by electronic properties beyond traditional chemical paradigms.
View Article and Find Full Text PDFQuantum magnetometry of transient signals with a time resolution of 1.1 nanoseconds.
Nat Commun
January 2025
Department of Physics, ETH Zürich, Otto-Stern-Weg 1, 8093, Zürich, Switzerland.
Quantum magnetometers based on spin defects in solids enable sensitive imaging of various magnetic phenomena, such as ferro- and antiferromagnetism, superconductivity, and current-induced fields. Existing protocols primarily focus on static fields or narrow-band dynamical signals, and are optimized for high sensitivity rather than fast time resolution. Here, we report detection of fast signal transients, providing a perspective for investigating the rich dynamics of magnetic systems.
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