Results 151 to 160 of about 58,600 (289)

Application of Gabor, Log-Gabor, and Adaptive Gabor Filters in Determining the Cut-Off Wavelength Shift of TFBG Sensors

open access: yesApplied Sciences
Tilted fibre Bragg gratings are optical fibre structures used as sensors of various physical quantities. Their unique measurement capabilities result from the high complexity of the optical spectrum consisting of several dozen cladding mode resonances ...
Sławomir Cięszczyk
doaj   +1 more source

Upconversion Photoluminescence to Monitor Local Heat Release During Femtosecond Direct Laser Writing of Bioinks In Situ

open access: yesSmall Methods, EarlyView.
Upconversion nanoparticle photoluminescence was used to quantify heat burden during femtosecond direct laser writing of bioinks in real time. Transient temperature spikes above 120–140°C demonstrate the need for a stringent process optimization, and fast 20 µm/s scan speeds were established to maintain physiological conditions.
Amirbahador Zeynali   +2 more
wiley   +1 more source

Evaluation of prestress losses in concrete beams using destructive and non‐destructive methods

open access: yesStructural Concrete, EarlyView.
Abstract Over the past few decades, prestressing techniques have become essential in the construction of key structures, infrastructure, and bridges. The serviceability and safety of prestressed concrete (PC) elements are closely tied to the effectiveness of the prestressing process.
A. N. Consiglio, G. Muciaccia, G. Rosati
wiley   +1 more source

Propagation of Light in Photonic Crystal Fibre Devices

open access: yes, 2005
We describe a semi-analytical approach for three-dimensional analysis of photonic crystal fibre devices. The approach relies on modal transmission-line theory. We offer two examples illustrating the utilization of this approach in photonic crystal fibres:
Akbari M   +18 more
core   +1 more source

A Dual‐Frequency Sensitivity Model for Optical Fibre Ultrasonic Sensors in Power Transformer Partial Discharge Detection

open access: yesHigh Voltage, EarlyView.
ABSTRACT The detection of partial discharges (PD) on the power transformer tank demands higher sensitivity in ultrasonic detection. To target the detection frequency band for sensor optimisation and enhance sensitivity, this paper presents a dual‐frequency sensitivity model for optical fibre ultrasonic sensors.
Sihan Wang   +4 more
wiley   +1 more source

Read My Leads: Subject‐Specific RF Hazard Assessment and Mitigation for DBS Implants in MRI

open access: yesMagnetic Resonance in Medicine, Volume 95, Issue 4, Page 2316-2330, April 2026.
ABSTRACT Purpose To develop and validate a framework for personalized, implant‐specific MRI safety assessments using feedback from commercial deep brain stimulation (DBS) systems. To further use this framework to suppress RF‐induced heating with minimum compromise in imaging performance.
Berk Silemek   +8 more
wiley   +1 more source

Thickness Effects on Distributed Backface Strain Sensing of Adhesively Bonded Joints Under Mixed Mode Fatigue Loading

open access: yesFatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 3, Page 963-978, March 2026.
ABSTRACT Adhesively bonded structures often consist of parts with different or varying thicknesses, which can influence their mechanical behavior and performance. Distributed backface strain monitoring using optical fiber sensors offers a promising solution for the real‐time structural monitoring of adhesive joints.
Alessandra Panerai   +3 more
wiley   +1 more source

MEMS‐Based Magnetoelectric Antennas for Wireless Power Transmission in Brain‐Implantable Devices

open access: yesAdvanced Materials Technologies, Volume 11, Issue 3, 5 February 2026.
Magnetoelectric (ME) antennas allow the minimization of the invasiveness of brain implantable devices, via powering wirelessly systems able to actuate neural tissue. In order to achieve the necessary power efficiency transmission, the choice of the materials and the system assembly is vital.
Laura Mazón‐Maldonado   +5 more
wiley   +1 more source

Photonic Integrated Circuit Based Temperature Sensor forOut-of-Autoclave Composite Parts Production Monitoring. [PDF]

open access: yesSensors (Basel), 2023
Syriopoulos G   +8 more
europepmc   +1 more source

A Lightweight Skin‐Adhesive Fiber Bragg Grating Sensor to Advance Minimally Invasive Healthcare Monitoring

open access: yesAdvanced NanoBiomed Research, Volume 6, Issue 2, February 2026.
A novel self‐adhesive hydrogel matrix is engineered to embed a fiber Bragg grating sensor for real‐time monitoring of physiological strain signals. The developed system conforms to the skin without external supports and, thanks to the fiber–matrix mechanical coupling, captures both subtle and large‐scale deformations.
Ilaria Condò   +4 more
wiley   +1 more source

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