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This open access book presents established methods of structural health monitoring (SHM) and discusses their technological merit in the current aerospace environment. While the aerospace industry aims for weight reduction to improve fuel efficiency, reduce environmental impact, and to decrease maintenance time and operating costs, aircraft structures are often designed and built heavier than required in order to accommodate unpredictable failure. A way to overcome this approach is the use of SHM systems to detect the presence of defects. This book covers all major contemporary aerospace-relevant SHM methods, from the basics of each method to the various defect types that SHM is required to detect to discussion of signal processing developments alongside considerations of aerospace safety requirements. It will be of interest to professionals in industry and academic researchers alike, as well as engineering students. This article/publication is based upon work from COST Action CA18203 (ODIN - http://odin-cost.com/), supported by COST (European Cooperation in Science and Technology). COST (European Cooperation in Science and Technology) is a funding agency for research and innovation networks. Our Actions help connect research initiatives across Europe and enable scientists to grow their ideas by sharing them with their peers. This boosts their research, career and innovation.

Materials science --- Aerospace & aviation technology --- Circuits & components --- Mensuration & systems of measurement --- Imaging systems & technology --- Mechanics of solids --- Structural health monitoring --- Aerospace monitoring --- Nondestructive evaluation --- Acoustic emission --- Guided waves --- Vibration monitoring --- Acousto-ultrasonics --- Fiber optical sensors --- Defect types --- Aerospace requirements --- open access

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The Special Issue "Fiber Optic Sensors in Chemical and Biological Applications” gathers recent original papers. The subjects of the papers cover a broad range of optical fiber chemical sensors and biosensors applied for regulation in bioreactors, to novel concepts of intrinsic optical fiber sensors.

Research & information: general --- Biology, life sciences --- fiber optic sensor --- gold nanoparticles --- localized surface plasmon resonance --- mercury --- ppb --- refractive index sensor --- gas sensor --- hollow-core photonic crystal fiber --- Mach–Zehnder interferometer --- whole-cell biosensor --- bioluminescent bioreporter --- optical fiber biosensor --- toluene --- Pseudomonas putida TVA8 --- Escherichia coli 652T7 --- fiber optics --- long period grating --- fiber optical sensors --- refractive index --- chemical sensing --- mercapto compound --- yeast cultivation --- feedback regulation --- glucose detection --- optical biosensor --- laser-induced plasma spectroscopy --- microchip laser --- hair analysis --- OFDR type DAS --- phase fading solution --- high SNR --- real-time events detection --- ammonia detection --- layer-by-layer --- U-bent optical fiber --- porphyrin --- poly(styrene sulfonate) --- diazo resin --- photocrosslinking --- fiber optic sensor --- gold nanoparticles --- localized surface plasmon resonance --- mercury --- ppb --- refractive index sensor --- gas sensor --- hollow-core photonic crystal fiber --- Mach–Zehnder interferometer --- whole-cell biosensor --- bioluminescent bioreporter --- optical fiber biosensor --- toluene --- Pseudomonas putida TVA8 --- Escherichia coli 652T7 --- fiber optics --- long period grating --- fiber optical sensors --- refractive index --- chemical sensing --- mercapto compound --- yeast cultivation --- feedback regulation --- glucose detection --- optical biosensor --- laser-induced plasma spectroscopy --- microchip laser --- hair analysis --- OFDR type DAS --- phase fading solution --- high SNR --- real-time events detection --- ammonia detection --- layer-by-layer --- U-bent optical fiber --- porphyrin --- poly(styrene sulfonate) --- diazo resin --- photocrosslinking