Results 91 to 100 of about 723,711 (310)

Optical Gas Sensor Fabrication Based on Porphyrin-Anchored Electrostatic Self-Assembly onto Tapered Optical Fibers [PDF]

open access: yes, 2012
Tapered optical fibers with nano-assembled coatings of thicknesses of order tens of nanometres were used for the detection of ammonia gas. The film coating was composed of alternate layers of tetrakis-(4-sulfophenyl) porphine (TSPP) and poly(allylamine ...
Lee, Seung-Woo   +5 more
core   +1 more source

Designing Polymer Nanocomposites for X‐Ray Shielding: Mechanisms, Architectures, and Scalable Processing

open access: yesAdvanced Engineering Materials, EarlyView.
This review highlights advances in lightweight, lead‐free polymer nanocomposites for diagnostic X‐ray shielding. By linking filler chemistry, dispersion, architecture, and photon interaction mechanisms, it establishes structure–performance relationships guiding material design.
Aklilu G. Messele   +2 more
wiley   +1 more source

Monitoring the New Circular Pedestrian Steel Bridge over the São Roque and Botirões Channels with Weldable Fiber-Bragg Grating Sensors [PDF]

open access: yes, 2006
To monitor a new circular pedestrian bridge, new strain and temperature sensors based on fiber Bragg gratings were developed to be directly welded to the steel structure, as well as proper protection and installation ...
Araújo, F. M.   +11 more
core   +2 more sources

FOA Lecture 11: Fiber Optic Network Design Part 3 [PDF]

open access: yes, 2011
This video is the 11th lecture in the FOA series on fiber optics and the third lecture on fiber optic network design. This lecture covers choosing components appropriate for network installation.
Hayes, Jim, 1946-
core   +2 more sources

Experimental Characterization of Mycelium‐Based Composites Under Multiple Loading Conditions

open access: yesAdvanced Engineering Materials, EarlyView.
This study examines the mechanical response of mycelium‐based composites under compression, shear, and tension using mechanical testing and imaging methods. The comparison between unpressed and hot‐pressed specimens shows that hot pressing is associated with higher compression and shear stiffnesses.
Shaghayegh Elahi   +5 more
wiley   +1 more source

Cascaded-Cavity Fabry-Perot Interferometric Gas Pressure Sensor based on Vernier Effect

open access: yesSensors, 2018
An extrinsic Fabry-Perot interferometer (EFPI) composed of double fiber FP cavities in a glass capillary tube to generate Vernier effect has been fabricated and employed for gas pressure sensing. A lead-in single-mode fiber (LSMF) and a reflective single-
Peng Chen   +4 more
doaj   +1 more source

Compatibility of Methacrylate Based Resins Controls Interfacial Failure and Toughness in 3D‐Printed Multimaterial Composites

open access: yesAdvanced Engineering Materials, EarlyView.
This work shows that the mechanical performance of multimaterial digital light processing (DLP) printed thermoset composites is governed by resin compatibility and interfacial design rather than spatial patterning alone. Brittle and ductile resin combinations produced premature interfacial failure, while graded interfaces and mechanically compatible ...
Ahmed M. H. Ibrahim   +3 more
wiley   +1 more source

FOA Lecture 8: Fiber Optic Installation [PDF]

open access: yes, 2011
This video is the 8th lecture in the FOA series on fiber optics. This lecture covers the different types of fiber optic installation in outside plant (OSP) and indoor (premises) installations.
Hayes, Jim, 1946-
core  

Quadratic behavior of fiber Bragg grating temperature coefficients [PDF]

open access: yes, 2004
We describe the characterization of the temperature and strain responses of fiber Bragg grating sensors by use of an interferometric interrogation technique to provide an absolute measurement of the grating wavelength. The fiber Bragg grating temperature
Bennion, Ian   +24 more
core   +1 more source

Review on Hollow-Core Fiber Based Multi-Gas Sensing Using Raman Spectroscopy

open access: yesPhotonic Sensors
In recent years, detecting and quantifying multiple gases have garnered widespread attention across various fields, particularly in volatile organic compound (VOC) detection, which holds significant importance for ecosystems and the medical field.
Qilu Nie   +6 more
doaj   +1 more source

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