Common industrial rotating electrical connection components often utilize contact-based connectors such as slip rings. However, during prolonged operation, issues like poor contact, increased friction, or even fires may arise. Non - contact power and data transmission technologies offer a promising approach to mitigate these problems, although their long-term dynamic performance requires further evaluation. Nevertheless, traditional wireless communication technologies exhibit instability and insufficient interference resistance in high-voltage enclosed environments. Addressing this, the paper systematically analyzes the characteristics of capacitive radio frequency (RF) transmission in a setup based on parallel-parallel magnetic coupling resonance and capacitive RF technology. Through simulation studies, the impact of the installation position of the wireless power transmission module and the isolation material on the performance of capacitive RF data transmission is investigated. A non-contact capacitive RF data channel with magnetic coupling resonance magnetic field isolation capability is designed. Based on this design, a non-contact magnetic coupling power and capacitive RF data co-transmission experimental platform with a rated capacity of 3 W is developed, verifying the feasibility and effectiveness of the proposed scheme. Simulation results indicate a peak baseline transfer efficiency of 84.53% under scaled-down conditions (492.2 mW), while experimental platform testing at the 3 W rated power achieves a transmission efficiency of 81.2%. Moreover, using level buffer amplification, the experimental data transmission rate reaches 14.4 kB/s (net effective data rate, corresponding to an uncoded raw bit rate of 115.2 kbps) with a bit error rate below 10 −6 on a stationary test bench. Although dynamic downhole verification under high-speed rotation and vibration remains for future work, this hybrid topology demonstrates the baseline feasibility of simultaneous, isolated power and high-speed data transmission between embedded drilling modules.
Neda Karami, Sebastian Knafl, Heinz D. Wanzenboeck, Sonia Prado-López
With ongoing and fast paced progress in cancer chemotherapy and immunotherapy, cancer survival rates have been steadily increased. However, cancer patients, especially in the paediatric and geriatric population are faced with a high risk of cardiotoxicity. This resulted in the emergence of the field of cardio-oncology, and more recently, precision cardio-oncology. A major concern in this context is the development of arrhythmias and contraction dysregulation. These adverse effects can be investigated in vitro. In the case of arrhythmia, the Comprehensive in vitro Proarrhythmia Assay (CiPA), established in 2013, provides a framework for evaluating proarrhythmic risk with improved specificity and sensitivity compared to traditional assays. CiPA outlines guidelines for preclinical assessment of drug-induced arrhythmia, incorporating a combination of in vitro, in silico, and clinical approaches applicable to a broad range of pharmaceutical compounds, including chemotherapeutics. The recommended in vitro methods under CiPA are transmembrane potential measurement techniques such as patch clamp and automated patch clamp, microelectrode arrays, impedance measurement and the use voltage sensing optical assays (VSOs) such as voltage indicator dyes and genetically encoded voltage indicators (GECIs). CiPA also recommends interfacing these in vitro methods with human induced pluripotent stem cells derived cardiomyocytes (hiPSC-CMs) to increase physiological relevance. Currently, there are neither guidelines in place for the in vitro assessment of cancer treatment induced arrhythmia (CTIA) or contraction dysregulation, nor any standardized protocols for evaluating cardiotoxicity resulting from cell-based cancer therapies. In this paper we review current in vitro approaches for the assessing of cardiotoxic effects of cancer treatments. Putting the focus in the state-of the art use of micro-electrode arrays (MEA) as a novel approach capable of simultaneously monitoring electrophysiological activity, contractile behaviour, and morphological changes induced by chemotherapeutic and immunotherapeutic agents.
Francisco J. Romero, Shayma Habboush, Seyedehsomayeh Hatefinasab, Cristina Fernandez, Akiko Ohata, Encarnación Castillo, Diego P. Morales, Noel Rodriguez
The security of modern electronic systems is increasingly grounded in the physical properties of hardware, rather than on purely algorithmic assumptions. In this context, passive circuit elements with memory, commonly referred to as mem-elements, have emerged as promising candidates for implementing hardware-based security primitives. Among them, memristors, as the most experimentally mature devices, have demonstrated significant potential in Physical Unclonable Functions (PUFs) and True Random Number Generators (TRNGs) by exploiting their intrinsic variability, nonlinearity, and history-dependent behavior. By contrast, memcapacitors and meminductors, which extend memory effects to energy-storing electrical and magnetic domains, remain largely unexplored in security applications, despite their richer dynamical structure and greater theoretical potential for entropy generation and resistance to inference. This mini-review provides a structured overview of the state of the art of mem-elements in hardware security, highlighting the differences in dynamical behavior and security-relevant properties across memristors, memcapacitors, and meminductors. The review identifies key limitations of current approaches based on static or low-dimensional variability, discusses the implications of machine-learning-based modelling attacks, and outlines open research challenges associated with the limited availability of memcapacitive and meminductive devices. Finally, it explores the potential of coupled memcapacitor–meminductor systems as a fundamentally new platform for entropy-driven and dynamically evolving security primitives, opening promising directions for next-generation hardware security.
Hua Li, Shuai Zhang, Jiangang Ding, Yuan La, Xianjun Lin, Wei Lin, Song Wang, Lin Zou
Mechanical vibration is a common operating condition of power transformers and may interact with electrical stress, thereby influencing partial discharge (PD) behavior in oil–paper insulation. To investigate this influence, an electro-mechanical coupled experimental platform was developed. Two typical PD defects, namely, needle–plate and floating electrode defects, were studied under various vibration frequencies and acceleration levels. The experimental results indicate that mechanical vibration affects PD characteristics in a defect-dependent manner. For floating defects, vibration significantly reduces the partial discharge inception voltage (PDIV) and average discharge magnitude, while markedly increasing the discharge repetition rate. Under certain conditions, the repetition rate increases by more than one order of magnitude, indicating intensified discharge activity. In contrast, the needle–plate defect exhibits lower sensitivity to vibration. Moderate vibration tends to suppress PD development and slightly increase PDIV, whereas higher vibration levels may promote discharge occurrence. Further analysis suggests that these differences arise from distinct dominant mechanisms. The PD behavior of floating defects is mainly attributed to vibration-induced electric field distortion caused by periodic electrode displacement, while that of needle–plate defects is jointly influenced by electric field variation and bubble dynamics in the oil gap. These findings provide experimental insight into the diagnosis of electro-mechanical coupled faults in power transformers.
