scholarly journals Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2294 ◽  
Author(s):  
Sergiy Korposh ◽  
Stephen James ◽  
Seung-Woo Lee ◽  
Ralph Tatam
Keyword(s):  
Optical Fibre ◽  
Evanescent Wave ◽  
Environmental Parameters ◽  
Physical Parameters ◽  
Optical Fibres ◽  
Future Perspectives ◽  
Current Trends ◽  
Physical Chemical ◽  
Sensing Platform ◽  
Sensing Platforms

The development of reliable, affordable and efficient sensors is a key step in providing tools for efficient monitoring of critical environmental parameters. This review focuses on the use of tapered optical fibres as an environmental sensing platform. Tapered fibres allow access to the evanescent wave of the propagating mode, which can be exploited to facilitate chemical sensing by spectroscopic evaluation of the medium surrounding the optical fibre, by measurement of the refractive index of the medium, or by coupling to other waveguides formed of chemically sensitive materials. In addition, the reduced diameter of the tapered section of the optical fibre can offer benefits when measuring physical parameters such as strain and temperature. A review of the basic sensing platforms implemented using tapered optical fibres and their application for development of fibre-optic physical, chemical and bio-sensors is presented.

scholarly journals Plastic Optical Fibre Sensors for Structural Health Monitoring: A Review of Recent Progress

2009 ◽  
Vol 2009 ◽  
pp. 1-13 ◽  
Author(s):  
K. S. C. Kuang ◽  
S. T. Quek ◽  
C. G. Koh ◽  
W. J. Cantwell ◽  
P. J. Scully
Keyword(s):  
Structural Health Monitoring ◽  
Optical Fibre ◽  
Health Monitoring ◽  
Structural Engineering ◽  
Low Cost ◽  
Physical Parameters ◽  
Optical Fibres ◽  
Engineering Structures ◽  
Structural Health ◽  
Optical Fibre Sensors

While a number of literature reviews have been published in recent times on the applications of optical fibre sensors in smart structures research, these have mainly focused on the use of conventional glass-based fibres. The availability of inexpensive, rugged, and large-core plastic-based optical fibres has resulted in growing interest amongst researchers in their use as low-cost sensors in a variety of areas including chemical sensing, biomedicine, and the measurement of a range of physical parameters. The sensing principles used in plastic optical fibres are often similar to those developed in glass-based fibres, but the advantages associated with plastic fibres render them attractive as an alternative to conventional glass fibres, and their ability to detect and measure physical parameters such as strain, stress, load, temperature, displacement, and pressure makes them suitable for structural health monitoring (SHM) applications. Increasingly their applications as sensors in the field of structural engineering are being studied and reported in literature. This article will provide a concise review of the applications of plastic optical fibre sensors for monitoring the integrity of engineering structures in the context of SHM.

scholarly journals Wearable Sensors for Human Environmental Exposure in Urban Settings

2021 ◽  
Author(s):  
Carolin Helbig ◽  
Maximilian Ueberham ◽  
Anna Maria Becker ◽  
Heike Marquart ◽  
Uwe Schlink
Keyword(s):  
Acoustic Noise ◽  
Wearable Sensors ◽  
Environmental Parameters ◽  
Urban Structure ◽  
Protective Behavior ◽  
Urban Settings ◽  
Current Trends ◽  
Spatio Temporal ◽  
Smart Technologies ◽  
Study Designs

AbstractGlobal population growth, urbanization, and climate change worsen the immediate environment of many individuals. Elevated concentrations of air pollutants, higher levels of acoustic noise, and more heat days, as well as increasingly complex mixtures of pollutants pose health risks for urban inhabitants. There is a growing awareness of the need to record personal environmental conditions (“the human exposome”) and to study options and implications of adaptive and protective behavior of individuals. The vast progress in smart technologies created wearable sensors that record environmental as well as spatio-temporal data while accompanying a person. Wearable sensing has two aspects: firstly, the exposure of an individual is recorded, and secondly, individuals act as explorers of the urban area. A literature review was undertaken using scientific literature databases with the objective to illustrate the state-of-the-art of person-based environmental sensing in urban settings. We give an overview of the study designs, highlight and compare limitations as well as results, and present the results of a keyword analysis. We identify current trends in the field, suggest possible future advancements, and lay out take-home messages for the readers. There is a trend towards studies that involve various environmental parameters and it is becoming increasingly important to identify and quantify the influence of various conditions (e.g., weather, urban structure, travel mode) on people’s exposure.

scholarly journals How Can We Adapt Thermal Comfort for Disabled Patients? A Case Study of French Healthcare Buildings in Summer

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4530
Author(s):  
Youcef Bouzidi ◽  
Zoubayre El Akili ◽  
Antoine Gademer ◽  
Nacef Tazi ◽  
Adil Chahboun
Keyword(s):  
Thermal Comfort ◽  
Thermal Environment ◽  
Residential Buildings ◽  
Linear Regression Analysis ◽  
Environmental Parameters ◽  
Physical Parameters ◽  
Mean Radiant Temperature ◽  
Operative Temperature ◽  
Neutral Temperature ◽  
Radiant Temperature

This paper investigates adaptive thermal comfort during summer in medical residences that are located in the French city of Troyes and managed by the Association of Parents of Disabled Children (APEI). Thermal comfort in these buildings is evaluated using subjective measurements and objective physical parameters. The thermal sensations of respondents were determined by questionnaires, while thermal comfort was estimated using the predicted mean vote (PMV) model. Indoor environmental parameters (relative humidity, mean radiant temperature, air temperature, and air velocity) were measured using a thermal environment sensor during the summer period in July and August 2018. A good correlation was found between operative temperature, mean radiant temperature, and PMV. The neutral temperature was determined by linear regression analysis of the operative temperature and Fanger’s PMV model. The obtained neutral temperature is 23.7 °C. Based on the datasets and questionnaires, the adaptive coefficient α representing patients’ capacity to adapt to heat was found to be 1.261. A strong correlation was also observed between the sequential thermal index n(t) and the adaptive temperature. Finally, a new empirical model of adaptive temperature was developed using the data collected from a longitudinal survey in four residential buildings of APEI in summer, and the obtained adaptive temperature is 25.0 °C with upper and lower limits of 24.7 °C and 25.4 °C.

Current trends and future perspectives of nanomedicine for the management of colon cancer

2021 ◽  
pp. 174464
Author(s):  
Shadma Wahab ◽  
Mohammad Y. Alshahrani ◽  
M.D. Faruque Ahmad ◽  
Hashim Abbas
Keyword(s):  
Colon Cancer ◽  
Future Perspectives ◽  
Current Trends

scholarly journals Microbial pigments as natural color sources: current trends and future perspectives

2014 ◽  
Vol 52 (8) ◽  
pp. 4669-4678 ◽  
Author(s):  
Hardeep S. Tuli ◽  
Prachi Chaudhary ◽  
Vikas Beniwal ◽  
Anil K. Sharma
Keyword(s):  
Future Perspectives ◽  
Current Trends ◽  
Natural Color

Vital Pulp Therapy Current Trends and Future Perspectives

2021 ◽  
Author(s):  
Iris Slutzky-Goldberg
Keyword(s):  
Root Development ◽  
Future Perspectives ◽  
Direct Pulp Capping ◽  
Pulp Capping ◽  
Pulp Therapy ◽  
Immature Teeth ◽  
Current Trends ◽  
Vital Pulp Therapy ◽  
Irreversible Pulpitis

Vital pulp therapy (VPT), including direct pulp capping, partial and cervical Pulpotomy, was suggested for the treatment of young teeth, with reversible or irreversible pulpitis [1]. Maintaining the vitality of immature teeth enables continued root development, maturogenesis, and a better prognosis

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