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Temporary postoperative cardiac pacing requires devices with percutaneous leads and external wired power and control systems. This hardware introduces risks for infection, limitations on patient mobility, and requirements for surgical extraction procedures. Bioresorbable pacemakers mitigate some of these disadvantages, but they demand pairing with external, wired systems and secondary mechanisms for control. We present a transient closed-loop system that combines a time-synchronized, wireless network of skin-integrated devices with an advanced bioresorbable pacemaker to control cardiac rhythms, track cardiopulmonary status, provide multihaptic feedback, and enable transient operation with minimal patient burden. The result provides a range of autonomous, rate-adaptive cardiac pacing capabilities, as demonstrated in rat, canine, and human heart studies. This work establishes an engineering framework for closed-loop temporary electrotherapy using wirelessly linked, body-integrated bioelectronic devices.
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http://dx.doi.org/10.1126/science.abm1703 | DOI Listing |
ISA Trans
August 2025
Key Laboratory of Industrial Computer Control Engineering of Hebei Province, Yanshan University, 066004, Qinghuangdao, China. Electronic address:
This article investigates a new approximation-free finite-time control method for active suspension systems (ASSs) to address uncertain nonlinearities and unknown time-varying input delays (UTIDs), while enhancing suspension performance. First, to improve the transient performance of ASSs, a unique finite-time prescribed performance function (FPPF) is designed to ensure that the suspension motion converges to a predetermined range within a finite time. Then, a novel compensator is developed to resolve the impact of unknown input delays in the closed-loop system.
View Article and Find Full Text PDFFront Mol Neurosci
August 2025
Department of Anesthesiology, The Affiliated Hospital, Southwest Medical University, Luzhou, Sichuan, China.
Postoperative cognitive dysfunction (POCD) remains a significant challenge in perioperative medicine, especially among older adults. Despite its prevalence, existing models centered on transient neuroinflammation fail to explain why cognitive deficits often persist long after systemic immune responses resolve. This review proposes a new framework: POCD is driven not by ongoing inflammation, but by a stable shift in microglial identity.
View Article and Find Full Text PDFISA Trans
August 2025
Department of Electrical Engineering, Khomeinishahr Branch, Islamic Azad University, Isfahan, Iran. Electronic address:
It is crucial to attain a non-overshooting step response in various applications. On the other hand, although various approaches have been presented to design fractional-order proportional-integral (FOPI) controllers in the literature, none of them can ensure a non-overshooting unit step response (USR) for the closed-loop system. This paper designs non-overshooting FOPI controllers for a fractional-order system (FOS) with one and two fractional orders.
View Article and Find Full Text PDFMicromachines (Basel)
July 2025
School of Mechanical and Electrical Engineering, Guilin University of Electronic Technology, Guilin 541004, China.
Silicon carbide (SiC) half-bridge power modules are widely utilized in new energy power generation, electric vehicles, and industrial power supplies. To address the research gap in collaborative validation between electro-thermal coupling models and process reliability, this paper proposes a closed-loop methodology of "design-simulation-process-validation". This approach integrates in-depth electro-thermal simulation (LTspice XVII/COMSOL Multiphysics 6.
View Article and Find Full Text PDFBrain Sci
July 2025
School of Automation Science and Engineering, South China University of Technology, Guangzhou 510641, China.
Transcranial magnetic stimulation combined with electroencephalography (TMS-EEG) has emerged as a transformative tool for probing cortical dynamics with millisecond precision. This review examines the state-dependent nature of TMS-EEG, a critical yet underexplored dimension influencing measurement reliability and clinical applicability. By integrating TMS's neuromodulatory capacity with EEG's temporal resolution, this synergy enables real-time analysis of brain network dynamics under varying neural states.
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