Archive

This observational study examined whether passively collected smartphone GPS features relate to depressive symptom severity in 48 college students over 10 weeks. Several mobility features (including location variance, entropy, and circadian movement) were reported to correlate with PHQ-9 scores. Associations were…

This engineering paper reports a prototype wearable patient-monitoring device that transmits vital-sign measurements via Bluetooth LE during MRI. Across 7 MRI acquisitions (25 minutes total), the authors report no Bluetooth packet loss, increased PPG noise during MRI, and no effect on temperature/humidity readings.…

This engineering paper presents an experimentally validated wearable personal exposimeter system for RF-EMF exposure monitoring, motivated by increasing wireless applications. It uses a distributed measurement approach and integrates inertial sensors to capture activity and posture during measurements. The system is…

This food science study assessed how UV irradiation, pulsed electric field, hot water dip, and ethanol vapour treatments affected mung bean sprout quality and storage life at room and low temperatures. The abstract reports minimal effects on sprout growth metrics, with ethanol suppressing length/weight, hot water dip…

This engineering study describes a method to improve the sensitivity of Faraday-effect-based heterodyning fiber laser sensors for magnetic field measurement. It reports an inverse relationship between magnetic-field sensitivity and intra-cavity linear birefringence, supported by theory and experimental birefringence…

This engineering study reports theoretical analysis and experimental demonstration of an S-tapered optical microfiber integrated with ferrofluid for magnetic-field tunability. The transmission spectrum and dip wavelengths were found to vary with magnetic-field intensity, with a Langevin-like response and a linear…

This engineering paper presents an intraoral version of the Tongue Drive System (iTDS) built into a dental retainer. It uses four 3-axis magnetoresistive sensors to detect tongue motion and transmits digitized data wirelessly via a dual-band 27/432 MHz transmitter, with configuration updates via a 13.56 MHz inductive…

This engineering study addresses measurement error in magnetoelastic resonance sensors caused by Earth's magnetic field. The authors present an antisymmetric magnetic bias field approach and compare the ribbon response to external perturbation fields against a conventional design. They report a 77% reduction in the…

This engineering paper describes a wireless implementation of a near-infrared profiling sensor using multiple sensor nodes and a base station for data preprocessing and realignment. It reports an enhanced classification approach using a back-propagation neural network to categorize objects as human, animal, or…

This study investigates instrumentation and procedures to assess electromagnetic exposure from compact fluorescent lamps (CFLs) by measuring both incident and induced fields in the 10 kHz–1 MHz range. For some CFLs, incident electric fields exceeded ICNIRP reference levels at close distances, but induced fields were…

This engineering paper proposes a control method for a photo-electromagnetic field (EMF)-based ammonia gas sensor that uses a wireless network and adjusts illumination light intensity. It reports that measurement error is minimized over 3800 ppm ammonia when the concentration corresponds to an optimal illumination…

This engineering study develops and experimentally evaluates a fuzzy-logic method for locating mobile robots in an intelligent space using wireless sensor networks. Localization relies on inter-node range measurements estimated from RF signal strength attenuation, which the authors describe as noisy and unreliable.…

This engineering paper describes low-power wireless sensor nodes and a cluster-based dynamic-tree hierarchical WSN architecture for monitoring historical buildings and wooden artifacts for early pest detection. The authors report simulation and demonstration results indicating improved scalability and reliability…

This article reports an engineering implementation of a wireless sensor network-based remote water-level monitoring system. The system includes field sensors, a base station, a data center, and a web publishing module, and is described as providing real-time monitoring and anti-jamming capability. The authors state…

This engineering-focused mouse fMRI study evaluated a 400-MHz cryogenic RF probe (CryoProbe) versus a conventional room-temperature surface coil during electrical forepaw stimulation. The CryoProbe increased image SNR and temporal SNR and reduced temporal noise compared with the room-temperature coil. The authors…

This paper uses atomistic simulations to examine how a nonpolar nanoparticle suspended in water reorients under an applied electric field. The authors report that molecular-level effects increase the torque relative to continuum estimates and substantially speed up reorientation above a stated field threshold. The…

This engineering study examined how a DC bias electric field affects the resonance frequency shift of a PMN-PT/tin piezoelectric microcantilever sensor during humidity detection. The authors report that applying a bias field enhanced the relative resonance frequency shift, with a maximum enhancement of more than…

This engineering paper introduces an RFID sensor network concept integrating RFID with wireless sensor networks and emphasizes the role of antennas. It discusses coil, dipole, and microstrip antennas and reports designing a microstrip antenna for a wireless temperature monitoring and control system. Measurements are…

This engineering conference paper describes a single access point method for localizing a subject using RF signals from wearable wireless sensors. The approach combines RSSI and LQI measurements from one basestation and applies filtering. The abstract reports that accuracy can approach that of multi-basestation…

This engineering study evaluates whether passive 13.56-MHz RFID-based chemical sensors can quantify analytes reliably despite repositioning errors between the sensor and pickup coil. Using simultaneous measurement of multiple complex-impedance parameters and multivariate statistical analysis, the authors report…