Andrei Shkel
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IEEE Sensors Letters

IEEE Sensors Letters is an electronic journal dedicated to publishing short manuscripts, quickly, on the latest and most significant developments in the field of sensors.

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Deadline: December 15, 2025

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Growth of the Journal

2.2
Impact Factor
0.422
Article Influence Score
0.00343
Eigenfactor

Latest Articles

Colloidal Gold-Assisted Isolation and Electric Lysis of Small Exosomes for Electrochemical Detection of HER2 Cancer Biomarker 

Pammi Guru Krishna Thej; Nusrat Praween; Sreedevi Vallabhapurapu; Srinivasu Vallabhapurapu; Palash Kumar Basu

Extracellular vesicles (EVs) that contain human epidermal growth factor receptor 2 (HER2) biomarkers are released by both healthy and cancerous cells, presenting substantial potential for the precise detection of numerous disorders, including cancer. To accurately quantify proteins, EVs must initially be separated from serum and then lysed to extract their protein content. Although ultracentrifugation is the predominant isolation technique, it has constraints regarding scalability and repeatability. Furthermore, traditional detergent-based lysis techniques endanger protein stability. This study introduces an innovative method for EV isolation utilizing colloidal gold nanoparticles, succeeded by lysis through sinusoidal electrical stimulation. A nonFaradaic electrochemical impedance spectroscopy (EIS) system has been developed utilizing screen-printed electrodes for determining HER2 protein levels. EV isolation was confirmed via western blotting for the EV-associated markers CD63 and HSP70. To promote the lysis of EVs, the EV sample was exposed to sine wave signals of differing amplitudes, with optimal disruption noted between 100 mV and 500 mV. The lysate was examined via EIS, producing a linear behavior from 5 μg/mL to 0.05 ng/mL with a limit of quantification of 0.109 μg/mL in human serum. The developed platform thus proves suitable for quantifying the HER2 protein from breast cancer patients.

Multi-LiDAR Registration: A Joint Sensor-Centric Optimization Approach

Jin Wu; Chengxi Zhang

Multi-light detection and ranging (LiDAR) fusion is widely used to increase scene coverage and improve 3-D reconstruction quality, but jointly registering point sets from scanners with different resolutions, scales, fields of view, and noise characteristics remains difficult and directly impacts sensing accuracy. This letter presents a sensor-centric multi-LiDAR joint registration framework, which includes the following. First, it lifts iterative closest points (ICP) to a high-dimensional formulation to jointly align multiple scans with block-structured rotation couplings. Second, it introduces data-driven weighting and a two-stage outlier diagnostics procedure tailored to cross-sensor inconsistencies. Lastly, it performs uncertainty-aware regularization using closed-form covariances for both rotation and translation. The method preserves simple singular value decomposition (SVD)-based updates while explicitly addressing heterogeneous sensor characteristics. Validation on two hardware platforms—a dual 2-D spinning setup (SICK TIM520 and Hokuyo UST10LX) and a dual Ouster OS1128 suite—demonstrates sensor-system-level accuracy gains, reducing accumulated pose error by 26.9%--40.8% relative to representative ICP variants, with run times ≈3× faster than point-to-plane ICP and ≈38× faster than Go-ICP (slightly slower than efficient sparse ICP). These results substantiate a direct contribution to sensor systems by improving multi-LiDAR integration robustness, accuracy, and deployment practicality.

Popular Articles

Sustainable Printed Chitosan-Based Humidity Sensor on Flexible Biocompatible Polymer Substrate

Humidity is one of the most relevant physical parameters to sense and control for a wide range of commercial and industrial applications. Consequently, there is continuing demand for the development of innovative and sustainable humidity sensor solutions. Here, the development and characterization of fully additively manufactured, highly sensitive, resistive Chitosan-based humidity sensors on flexible thermoplastic polyurethane (TPU) foil, as well as on a glass carrier substrate are presented. The sensors unite aspects of sustainability and high performance in a broad humidity range (20–90%rH). The humidity response follows an exponential curve progression with relative changes in the resistance per %rH of 6.9% and 5.7% for the glass carrier sensor and the TPU sensor, respectively. In absolute values, this means that the Chitosan-based sensors are particularly sensitive in the low humidity range with a vast dynamic range (ten times larger compared to commonly used capacitive humidity sensors). The flexible sensor on the TPU substrate shows great stability even after repeated bending. In addition, the combination of flexible and biocompatible materials (TPU and Chitosan) with additive manufacturing technologies makes the sensor particularly sustainable while having great potential for a plethora of biomedical applications.

IoT-Enabled Sensors in Automation Systems and Their Security Challenges

Today, Internet of Things (IoT)-based sensor devices are ubiquitous. Being cost effective and easy to deploy, they are also considered for many applications outside their original domain, which was consumer electronics. Factory and process automation, smart buildings and homes, and, in general, Industry 4.0 are application fields in which the use of IoT technology is gaining popularity, often in addition to existing, classical communication architectures on the operational technology level. IoT devices, however, typically have a different philosophy for communication and data exchange, which makes them easy to use but poses security challenges by bypassing established security architectures, such as the classical defense-in-depth concept defined, for instance, in the IEC 62443 standard. This letter highlights today's security needs and concepts in industrial environments. Furthermore, it looks at possible new attack surfaces opened by IoT-based applications and shows ways how to bridge the security gap.

DeepMUSIC: Multiple Signal Classification via Deep Learning

This letter introduces a deep learning (DL) framework for the classification of multiple signals in direction finding (DF) scenario via sensor arrays. Previous works in DL context mostly consider a single or two target scenario, which is a strong limitation in practice. Hence, in this letter, we propose a DL framework called DeepMUSIC for multiple signal classification. We design multiple deep convolutional neural networks (CNNs), each of which is dedicated to a subregion of the angular spectrum. Each CNN learns the MUltiple SIgnal Classification (MUSIC) spectra of the corresponding angular subregion. Hence, it constructs a nonlinear relationship between the received sensor data and the angular spectrum. We have shown, through simulations, that the proposed DeepMUSIC framework has superior estimation accuracy and exhibits less computational complexity in comparison with both DL- and non-DL-based techniques.

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Special Issues

Editorial Board

Andrei Shkel
Editor-in-Chief
University of California, Irvine, USA
Deepak Uttamchandani
Associate Editor-in-Chief
Strathclyde University, Glasgow, UK
Francisco Falcone
Associate Editor-in-Chief
Univ. Publica de Navarra, Spain
Thilo Sauter
Associate Editor-in-Chief
TU Wien and Danube University, Krems, Austria
Giacomo Langfelder
Associate Editor-in-Chief
Politecnico de Milano, Italy
Srinivas Tadigadapa
Founding Editor-in-Chief (2017-2022)
Northeastern University, USA
David Elata
Sensor Phenomena and Modeling Topical Editor
Technion, Haifa, Israel
Michael Kraft
Sensor/Electronic Interfaces Topical Editor
University of Liège, Belgium
Doruk Senka
Associate Editor
Reality Labs, Meta, USA
Chia-Chan Chang
Associate Editor
National Chung-Cheng University, Taiwan
Karthik Shankar
Associate Editor
University of Alberta, Edmonton, Canada
Sheng-Shian Li
Associate Editor
National Tsing Hua University, Taiwan
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