Article
Chemistry, Multidisciplinary
Mohammad Mousavi, Mohammad Alzgool, Benyamin Davaji, Shahrzad Towfighian
Summary: This paper presents two solutions for improving the performance of MEMS triboelectric vibration sensors in contact-separation mode. The first solution involves using a warped MEMS diaphragm constrained on its edges, which provides larger displacement and voltage output. The second solution involves adding constraints on the edge of the diaphragm, which increases charge density and voltage generation. These solutions show promising results in terms of sensitivity and signal-to-noise ratio improvement.
Article
Engineering, Electrical & Electronic
Chih-Hsuan Lin, Kuei-Ann Wen
Summary: This paper proposes a design of ultralow-power sensing systems based on metal-oxide-semiconductor, utilizing a transient detector and delay cell, two layers of structure stacking, and electrostatic discharge suppression methods to achieve cost-effective power consumption reduction and effective handling of electrostatic discharge events without affecting sensor systems.
JOURNAL OF NANOELECTRONICS AND OPTOELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Semih Taniker, Vincenzo Costanza, Paolo Celli, Chiara Daraio
Summary: We propose the realization of capacitive temperature sensors based on the concept of displacement amplification. Our design utilizes high CTE metallic layers and a low CTE dielectric layer to achieve large out-of-plane displacements and capacitive changes as the temperature increases.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Multidisciplinary
Jianping Yu, Shengjie Yao, Xin Li, Abdul Ghaffar, Yuanxiang Zhang, Xiaoliang Jiang, Huan Lin, Zhehe Yao
Summary: This paper proposes a soft tactile sensing array for three-axis pressure measurement, which is enabled by a floating electrode structure and hierarchically porous PDMS composite. The array exhibits enhanced sensitivity and pressure sensing range, as well as good repeatability and response time.
Article
Chemistry, Analytical
Dunzhu Xia, Mohan Yao, Jinhui Li
Summary: This article introduces a tri-axis accelerometer with a digital readout circuit and communication system. The device consists of resonant accelerometers in the x and y-axis and a seesaw capacitive one in the z-axis. The measurement is based on FPGA and test results show low bias instability, cross-coupling error, and nonlinearity. This tri-axis digital accelerometer with serial ports is more valuable than previous works with large commercial instruments.
Article
Engineering, Electrical & Electronic
Paul P. Sotiriadis, Konstantinos Papafotis
Summary: The proposed method in this work introduces a single-step approach for alignment of a three-axis accelerometer and a three-axis magnetometer based on magnetic inclination. It is executed when the sensors are fixed on the same platform and does not require specialized equipment. The method is significantly faster than existing iterative algorithms and its accuracy is demonstrated through simulated measurements.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Review
Engineering, Electrical & Electronic
Balasubramanian Malayappan, U. Poorna Lakshmi, B. V. V. S. N. Prabhakar Rao, Kannan Ramaswamy, Prasant Kumar Pattnaik
Summary: This article provides a review of optical MEMS accelerometers, focusing on sensing techniques and interrogation methods. The performance of an accelerometer is determined by its range, bandwidth, sensitivity, and resolution. The article classifies the sensing techniques as guided-wave or free-space based, and the interrogation methods as intensity modulation or frequency modulation based. It also describes a high-resolution optical MEMS accelerometer based on waveguide Bragg gratings. The combination of free-space based sensing and intensity-modulation based interrogation is suitable for consumer-grade applications, while guided-wave sensing and frequency-modulation based interrogation are more appropriate for high-resolution applications.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Interdisciplinary Applications
Billy Senington, Raymond Y. Lee, Jonathan Mark Williams
Summary: The study demonstrates the validity and reliability of using inertial sensors to collect tibial accelerations and spinal kinematics in fast bowling analysis, showing comparable accuracy and reliability to traditional methods. The novel metrics and methods described may assist coaches and practitioners in designing and monitoring fast bowling technique.
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
(2021)
Article
Engineering, Electrical & Electronic
Teng Guo, Yilin Wang, Shuangshuang Li, Xingyong Li, Xueguang Qiao
Summary: This study proposes an elliptical spring-based three-axis fiber Bragg grating accelerometer, which consists of three identical one-axis sensing structures arranged and encapsulated in a cylindrical shell. The theoretical equations and simulation model of the sensing structure are in agreement with the experimental results. The proposed accelerometer exhibits high sensitivity, good consistency, directional response, and resistance to transverse interference with sensitivities of 1197.82, 1157.78, and 1223.04 pm/g in the X-Z directions.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Physical
Sara Rachel Arussy Ruth, Vivian Rachel Feig, Min-gu Kim, Yasser Khan, Jason Khoi Phong, Zhenan Bao
Summary: To mimic human touch sensing, robotics require leveraging multiple sensory inputs. A new design has been created for a multifunctional capacitive pressure sensor with proximity-sensing capabilities, which can strongly sense pressure in contact mode as an equivalent parallel plate capacitive sensor of the same size.
Article
Chemistry, Analytical
Zhenyi Gao, Bin Zhou, Xiang Li, Lei Yang, Qi Wei, Rong Zhang
Summary: A novel digital-analog hybrid system-on-chip is designed for controlling and processing sensors based on capacitance detection. Utilizing the least mean square error demodulation algorithm, the low-power Cortex-M3 processor supports software implementation of control algorithms, with a maximum operating frequency of 105 MHz.
Article
Chemistry, Analytical
Yurong He, Chaowei Si, Guowei Han, Yongmei Zhao, Jin Ning, Fuhua Yang
Summary: A novel teeter-totter type accelerometer based on glass-silicon composite wafers is reported in this paper, with the unique structure simplifying the fabrication process and saving chip area. The accelerometer, manufactured through micromachining, exhibits good sensitivity and stability, meeting the needs of most acceleration detecting applications.
Article
Engineering, Electrical & Electronic
Minghui Pu, Qi Luo, Quan Liang, Jinhao Zhang
Summary: This paper presents a novel analytical model to improve the estimation accuracy of elastomer displacements for Y-type elastomer capacitive six-axis force/torque sensors. The proposed model is based on Statics and Timoshenko beam theory and is validated through FEA simulation.
IEEE SENSORS JOURNAL
(2022)
Article
Computer Science, Artificial Intelligence
Anwer Sabah Ahmed, Qais Al-Gayem
Summary: MEMS-IMUs are widely used in various fields. This study presents a turntable-based IMU calibration technique that reduces the sensor's innate errors. The technique utilizes the gravitational signal as a constant reference and requires no external equipment. It offers a faster and easier calibration process, and experimental results show significant improvements in bias instability within a temperature range.
APPLIED COMPUTATIONAL INTELLIGENCE AND SOFT COMPUTING
(2023)
Article
Engineering, Electrical & Electronic
Alireza Hassanzadeh, Ali Moulavi, Amir Panahi
Summary: This paper presents a design of an implantable capacitive sensor for evaluating new bone growth with the motivation of reducing medical x-ray imaging dose. The sensor features low energy consumption, stable performance, and wireless data transmission to a reader device via an inductive link. Experimental results show a wide range of capacitance variation in the sensor, enabling better characterization of bone development.
IEEE SENSORS JOURNAL
(2021)
Article
Geochemistry & Geophysics
Ahmad Obeid, Ibrahim M. Elfadel, Naoufel Werghi
Summary: This letter introduces a novel deep learning clustering algorithm for automatic labeling of remote sensing datasets, which addresses the issue of data imbalance in the deep embedded clustering (DEC) algorithm through additional search and extraction steps. The proposed algorithm is highly parallelizable and achieves significant performance speedup (40X to 2600X) and improved clustering accuracy compared to DEC and other clustering approaches.
IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
(2022)
Article
Optics
Zakriya Mohammed, Bruna Paredes, Mahmoud Rasras
Summary: We designed and demonstrated an ultra-compact 1310/1550 run wavelength diplexer based on a multimode interference (MMI) coupler. The device showed low insertion loss and high extinction ratio, and displayed a wide 3-dB bandwidth. Additionally, clear eye diagrams were observed for both wavelengths in an on-chip wavelength demultiplexing experiment.
Article
Chemistry, Physical
Ayman Rezk, Juveiriah M. Ashraf, Wafa Alnaqbi, Sabina Abdul Hadi, Ghada Dushaq, Aisha Alhammadi, Tala El Kukhun, Mahmoud Rasras, Ahmad R. Nusair, Munir Nayfeh, Ammar Nayfeh
Summary: The study utilized luminescent silicon nanoparticles to examine the chemical mechanism of mask filtration, finding that the Si nanoparticles bonded to the PE fiber network, suggesting that the PE fibers could act as a chemical filter through various bonding interactions.
Article
Chemistry, Multidisciplinary
Marieh B. Al-Handawi, Ghada Dushaq, Patrick Commins, Durga Prasad Karothu, Mahmoud Rasras, Luca Catalano, Pance Naumov
Summary: This study reports the autonomous self-healing capability of centimeter-size single crystals of methylammonium lead(II) iodide (MAPbI(3)) at ambient temperature, with remarkable recovery of their optoelectronic properties. This discovery overcomes the challenges of chemical stability and mechanical robustness, providing a new strategy for the development of durable and stable optoelectronic devices based on single crystals of hybrid perovskites.
ADVANCED MATERIALS
(2022)
Article
Engineering, Electrical & Electronic
Srinivasa Reddy Tamalampudi, Ghada Dushaq, Juan E. Villegas, Bruna Paredes, Mahmoud S. Rasras
Summary: This work presents high-performance two-dimensional photodetectors with the potential for on-chip integration. The photodetectors, made of planar silicon telluride (Si2Te3), show excellent photoresponse at 1310 and 1550 nm wavelengths. The devices also exhibit good frequency response with different metal contacts. Additionally, a prototype of a Si2Te3 photodetector integrated onto a Si waveguide is demonstrated, showing promising potential for optical communication photodetection.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2022)
Article
Optics
Ghada Dushaq, Bruna Paredes, Juan E. Villegas, Srinivasa R. Tamalampudi, Mahmoud Rasras
Summary: This study reports a waveguide integrated photodetector based on a novel 2D GeP material. The GeP material combines narrow and wide tunable bandgap energies, allowing for broadband operation from visible to mid-infrared spectral range. Compared to graphene devices, the GeP photodetectors demonstrate low dark current, excellent stability, and reproducibility. Additionally, the GeP devices exhibit remarkable photoresponsivity and high external quantum efficiency, suggesting their potential for advanced optoelectronic integration.
Article
Computer Science, Information Systems
Lamees M. Al Qassem, Thanos Stouraitis, Ernesto Damiani, Ibrahim M. Elfadel
Summary: The popularity of cloud computing services and the usage of FPGAs for accelerating compute-intensive applications are changing the computational domain. This article surveys recent frameworks for offering FPGA hardware acceleration as a cloud service and classifies them. The article also highlights important areas for future research.
IEEE TRANSACTIONS ON SERVICES COMPUTING
(2022)
Article
Engineering, Electrical & Electronic
Humaira Zafar, Bruna Paredes, Inas Taha, Juan E. Villegas, Mahmoud Rasras, Mauro F. Pereira
Summary: This paper introduces a broadband and ultra-low crosstalk integrated silicon superlattice waveguide, enabling high-density waveguide integration. The superlattice waveguides are implemented as S-shaped adiabatic bends, which result in ultra-low crosstalks and extremely low insertion loss for the TE polarization. The measurement results show that the average insertion loss for all channels is <= 0.1 dB, and the average crosstalk values for the first and second nearest neighboring waveguides are <= -37.8 dB and <= -45.2 dB, respectively. Simulation results predict efficient broadband performance over a wavelength range of 500 nm, covering all O, E, S, C, L, and U bands. This approach is applicable to other waveguide geometries and integrated photonic platforms.
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Srinivasa Reddy Tamalampudi, Ghada Hamed Dushaq, Juan E. Villegas, Bruna Paredes, Mahmoud S. Rasras
Summary: In this study, the tuning of the optical index of refraction based on hybrid integration of multi-layered anisotropic GaGeTe on a silicon micro-ring resonator (Si-MRR) is demonstrated. The device exhibits a linear resonance shift under TE polarization and both amplitude and phase modulation under TM polarization. The device also shows good dynamic RF response and has great potential for integrated photonic applications on the silicon photonics platform.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Ghada Dushaq, Juan Esteban Villegas, Bruna Paredes, Srinivasa Reddy Tamalampudi, Mahmoud S. Rasras
Summary: In this study, the strong anisotropy of multilayer 2D GeAs was utilized to validate the technical feasibility of on-chip light management. The optical transmission spectra indicated a remarkable discrepancy between the in-plane crystal optical axes. The effect of GeAs crystal orientation on the electro-optic transmission performance was also demonstrated.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Optics
Humaira Zafar, Bruna Paredes, Juan Villegas, Mahmoud Rasras, Mauro Fernandes Pereira
Summary: An efficient, dual-polarization silicon waveguide array with low insertion losses and negligible crosstalks for both TE and TM polarizations has been reported using S-shaped adiabatically bent waveguides.
Article
Engineering, Electrical & Electronic
Bruna Paredes, Zakriya Mohammed, Juan Esteban Villegas, Mahmoud Rasras
Summary: We designed and demonstrated an ultra-compact and ultra-broadband two-mode de-multiplexer based on a subwavelength grating (SWG) asymmetrical coupler (ADC) on a silicon-on-insulator (SOI) platform. The device consists of a cascaded strip waveguide tapered to a multimode segment and a SWG-based single-mode waveguide. The MDM link operates over a wide wavelength range, covering the entire S-, C-, and L-bands, achieving low insertion loss and crosstalk.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ibrahim (Abe) M. Elfadel
Summary: Tellegen's theorem is a fundamental topological theorem in circuit theory that can be used to derive important results in electrical circuit networks. It can also be generalized to the field case of Maxwell's equations and quantum wave functions, making it useful in the analysis and modeling of microwave devices and quantum computing.
2022 IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS (ISCAS 22)
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Rupesh Raj Karn, Ibrahim M. Elfadel
Summary: Confidential computing involves operating on encrypted inputs to produce encrypted outputs. This paper presents a method for conducting confidential inference using homomorphic encryption, showcasing an FPGA implementation and resource evaluation.
PROCEEDINGS OF THE 2022 IFIP/IEEE 30TH INTERNATIONAL CONFERENCE ON VERY LARGE SCALE INTEGRATION (VLSI-SOC)
(2022)
Proceedings Paper
Computer Science, Hardware & Architecture
Shahzad Muzaffar, Ibrahim (Abe) M. Elfadel
Summary: This paper introduces a novel algorithm for securing sequential circuits at the RTL level without requiring any state augmentation. The algorithm encrypts the state encodings with a key known only to the IP provider, ensuring that incorrect keys do not trap the circuit. The proposed method provides enhanced immunity to reverse engineering attacks and side-channel attacks.
PROCEEDINGS OF THE 2022 IFIP/IEEE 30TH INTERNATIONAL CONFERENCE ON VERY LARGE SCALE INTEGRATION (VLSI-SOC)
(2022)