Article
Biochemistry & Molecular Biology
Yuanjie Sun, Yoshihisa Koyama, Shoichi Shimada
Summary: Gastrointestinal pH is crucial in gastrointestinal diseases. This study developed a fast and simple method using pH indicator paper to measure pH changes in mice. The results showed consistent patterns in mice with colitis or hepatitis.
BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
(2022)
Article
Computer Science, Artificial Intelligence
Zhou Chen, Jinxi Xiang, Pierre-Olivier Bagnaninchi, Yunjie Yang
Summary: This article presents a learning algorithm called MMV-Net based on a multiple measurement vector (MMV) model to solve the mfEIT image reconstruction problem. MMV-Net considers the correlations between mfEIT images and uses a cascade of a Spatial Self-Attention module and a ConvLSTM module to capture intrafrequency and interfrequency dependencies. The experimental results demonstrate that MMV-Net outperforms traditional methods and state-of-the-art deep learning methods in terms of image quality, convergence performance, noise robustness, and computational efficiency.
IEEE TRANSACTIONS ON NEURAL NETWORKS AND LEARNING SYSTEMS
(2023)
Article
Electrochemistry
A. Schuller, T. J. Schmidt, J. Eller
Summary: A non-invasive method is proposed to determine the local humidity and resistance distribution in polymer electrolyte fuel cells. The method uses multiple electrodes to inject alternating currents and interprets the results through interpolation, showing good matching and reproducibility.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Engineering, Electrical & Electronic
Jianping Li, El Maalouma Sidi Brahim, Jianming Wen, Nen Wan, Yili Hu, Lidong He, Masahiro Takei
Summary: This study proposes a method to monitor erythrocyte sedimentation using electrical impedance spectroscopy, with analysis of multi-frequency parameters and T-shape container. Results show a significant influence of erythrocyte sedimentation on blood impedance, and a good linear relationship between the multi-frequency parameter X-c and sedimentation ratio R-se. The research has scientific and practical value in real-time monitoring of erythrocyte sedimentation with smaller sample volume and automation.
IEEE SENSORS JOURNAL
(2021)
Article
Multidisciplinary Sciences
Hyeuknam Kwon, Hyoung Churl Park, Albert Cheto Barrera, Seward B. Rutkove, Benjamin Sanchez
Summary: This paper presents a novel method for measuring the permittivity of two-dimensional anisotropic tissues using a multi-electrode cross-shaped needle. By designing a new needle and analyzing the apparent impedance, the authors propose three methods to estimate the anisotropic muscle permittivity. This research opens up new possibilities for neuromuscular diagnosis and assessing the effects of therapeutic interventions on muscle health.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
K. Pesti, M. Metshein, P. Annus, H. Koiv, M. Min
Summary: Continuous cardiac output is a significant matter that must be considered in monitoring the functioning of the cardiovascular system. A noninvasive sensing system based on measuring electrical bioimpedance variations of the radial artery is proposed to evaluate the physical condition of a patient. The novel five-electrode FIM strategy shows advances in measuring the pulsating volume of blood in the radial artery with the goal of determining the central aortic pressure (CAP) of blood.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Agronomy
Zizhao Yang, Ahmed Amin, Yongnian Zhang, Xiaochan Wang, Guangming Chen, Mahmoud A. Abdelhamid
Summary: This paper presents a device for sorting tomatoes based on force and bioelectrical impedance measurement. By applying a certain pre-tightening force, the FSR sensor can be attached to the tomato and establish an electric current pathway for impedance measurement. The bioelectric parameters of tomatoes can not only judge their ripeness, but also compensate for force measurement to achieve accurate non-destructive sorting. Experimental results show that the system can complete tomato ripeness detection within 0.6 s of stable grasping and achieve 95% accuracy through impedance.
Article
Engineering, Electrical & Electronic
Mitar Simic, Adrian K. Stavrakis, Goran M. Stojanovic
Summary: This paper presents a processing-efficient method for parameter estimation of a Randles circuit, which does not require iteration and can be implemented on microcontroller platforms. The method was validated through simulations and experimental data, confirming its reliability and accuracy for low-cost embedded hardware.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Mustafa Istanbullu, Mutlu Avci
Summary: An artificial neural network-based signal post-processing algorithm is proposed in this study to overcome the calibration requirements of the AD5933 integrated circuit, which requires different impedances for different ranges. A specific application artificial neural network topology is developed and trained for high precision impedance measurement. The proposed measurement system is designed to operate within the range of nominal skin impedance, and the signal post-processing approach significantly improved the measurement accuracy of the AD5933 integrated circuit despite using a fixed calibration resistance.
IEEE SENSORS JOURNAL
(2021)
Article
Computer Science, Information Systems
Jungwoo Lee, Jinhyuk Kim
Summary: This paper proposes impedance matching methods for Langevin transducers, evaluating the effectiveness of a series inductor scheme and low pass filter. Through MATLAB simulation and experimental measurements, it is demonstrated that using a series L circuit can significantly improve the matching performance and acoustic pressure output of high-power Langevin transducers.
Article
Engineering, Chemical
Mai Lien Tran, Chun-Chieh Fu, Meng-Han Wu, Ruey-Shin Juang
Summary: In this study, electrical impedance spectroscopy (EIS) was used to monitor fouling development during crossflow ultrafiltration (UF) process. The variations of electrical impedance and filtration resistance were examined to validate the effectiveness of EIS technique in fouling monitoring.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2022)
Article
Clinical Neurology
Lei Wang, Wenjing Zhu, Rong Wang, Weichen Li, Guohua Liang, Zhenyu Ji, Xiuzhen Dong, Xuetao Shi
Summary: This study aims to eliminate interference of electrical impedance tomography (EIT) on simultaneous recording of electroencephalography (EEG) for seizure detection. By using filters to suppress high-frequency and low-frequency interferences, the study successfully recognized normal EEG and epileptic EEG.
FRONTIERS IN NEUROLOGY
(2022)
Article
Instruments & Instrumentation
Mahreen, A. Ganguli, Veda Prakash Gajula, Satyananda Kar, Debaprasad Sahu
Summary: This paper presents a joint calibration scheme for voltage and current probes to accurately resolve voltage-current phase differences, even when the difference is very close to 90 degrees. This has been a major issue with V-I probes used with miniature RF plasma devices. The proposed scheme improves the accuracy of phase resolution and provides indispensable tools for electrical characterization of RF plasma devices.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Electrical & Electronic
Yanbin Xu, Zhicheng Yan, Bing Han, Feng Dong
Summary: This article presents the design and evaluation of a wideband and high-precision MFEIT system, which demonstrates stability and accuracy in biomedical applications, showing relatively high SNR in experiments.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Electrical & Electronic
Jose Waimin, Hongjie Jiang, David A. Detwiler, Martha E. Jimenez-Castaneda, Zeynep Mutlu, Mukerrem Cakmak, Tim Filley, Rahim Rahimi
Summary: Bacteria play essential roles in soil health maintenance, and real-time monitoring of their activity levels can provide insights into soil quality, nutrient availability, and future crop yields. A non-destructive technique for monitoring cellulase activity of microorganisms in targeted ecosystems has been demonstrated using a cellulose acetate membrane. The proposed method shows potential for in-field measurements and real-time assessment of microbial activity, with implications for precision agricultural applications.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
