Guided SH-SAW Sensing System for Liquid Viscosity Sensing Applications

2011 ◽  
Vol 9 (2) ◽  
pp. 605-608 ◽  
Author(s):  
C. J. Cheng ◽  
C. T. Feng ◽  
M. Z. Atashbar ◽  
W. Wlodarski ◽  
K. Kalantar-Zadeh
Keyword(s):  
Liquid Viscosity ◽  
Sensing System ◽  
Sensing Applications ◽  
Viscosity Sensing

Mobile Crowd-sensing Applications: Data Redundancies, Challenges, and Solutions

2022 ◽  
Vol 22 (2) ◽  
pp. 1-15
Author(s):  
Tu N. Nguyen ◽  
Sherali Zeadally
Keyword(s):  
Mobile Devices ◽  
Cyber Physical System ◽  
Redundant Information ◽  
Mobile Crowd Sensing ◽  
Sensing System ◽  
Sensing Systems ◽  
Sensing Applications ◽  
Crowd Sensing ◽  
Mobile Crowd ◽  
Collection Methods

Conventional data collection methods that use Wireless Sensor Networks (WSNs) suffer from disadvantages such as deployment location limitation, geographical distance, as well as high construction and deployment costs of WSNs. Recently, various efforts have been promoting mobile crowd-sensing (such as a community with people using mobile devices) as a way to collect data based on existing resources. A Mobile Crowd-Sensing System can be considered as a Cyber-Physical System (CPS), because it allows people with mobile devices to collect and supply data to CPSs’ centers. In practical mobile crowd-sensing applications, due to limited budgets for the different expenditure categories in the system, it is necessary to minimize the collection of redundant information to save more resources for the investor. We study the problem of selecting participants in Mobile Crowd-Sensing Systems without redundant information such that the number of users is minimized and the number of records (events) reported by users is maximized, also known as the Participant-Report-Incident Redundant Avoidance (PRIRA) problem. We propose a new approximation algorithm, called the Maximum-Participant-Report Algorithm (MPRA) to solve the PRIRA problem. Through rigorous theoretical analysis and experimentation, we demonstrate that our proposed method performs well within reasonable bounds of computational complexity.

scholarly journals On-line Writing of Fiber Bragg Grating Array on a Two-mode Optical Fiber for Sensing Applications

Materials ◽  
2019 ◽  
Vol 12 (8) ◽  
pp. 1263 ◽  
Author(s):  
Haihu Yu ◽  
Wenjing Gao ◽  
Xin Jiang ◽  
Huiyong Guo ◽  
Shan Jiang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Simultaneous Detection ◽  
Bragg Grating ◽  
Curvature Sensing ◽  
Fiber Sensing ◽  
Sensing System ◽  
Sensing Applications ◽  
On Line ◽  
Grating Array

On-line fabricated fiber Bragg grating (FBG) array and its sensing potentials have attracted plenty of attention in recent years. In this paper, FBG arrays are written on-line on a two-mode fiber, and this two-mode fiber Bragg grating (TM-FBG) is further experimentally investigated for temperature and curvature sensing. The responses of this sensor were characterized by 11.2 pm/°C and −0.21 dB/m−1 for temperature and curvature, respectively. Based on the measurements, a dual-parameter fiber sensing system was developed, which can realize the quasi-distributed, simultaneous detection of temperature and curvature, making it suitable for structural health monitoring or perimeter security.

scholarly journals Orchard management with small unmanned aerial vehicles: a survey of sensing and analysis approaches

2021 ◽  
Author(s):  
Chenglong Zhang ◽  
João Valente ◽  
Lammert Kooistra ◽  
Leifeng Guo ◽  
Wensheng Wang
Keyword(s):  
Individual Tree ◽  
Industry Chain ◽  
Sensing System ◽  
Sensing Applications ◽  
Orchard Management ◽  
Aerial Vehicle ◽  
Remote Sensing Applications ◽  
Optimal Approach ◽  
Fruit Orchards ◽  
Processing Techniques

AbstractAdvances in sensor miniaturization are increasing the global popularity of unmanned aerial vehicle (UAV)-based remote sensing applications in many domains of agriculture. Fruit orchards (the source of the fruit industry chain) require site-specific or even individual-tree-specific management throughout the growing season—from flowering, fruitlet development, ripening, and harvest—to tree dormancy. The recent increase in research on deploying UAV in orchard management has yielded new insights but challenges relating to determining the optimal approach (e.g., image-processing methods) are hampering widespread adoption, largely because there is no standard workflow for the application of UAVs in orchard management. This paper provides a comprehensive literature review focused on UAV-based orchard management: the survey includes achievements to date and shortcomings to be addressed. Sensing system architecture focusing on UAVs and sensors is summarized. Then up-to-date applications supported by UAVs in orchard management are described, focusing on the diversity of data-processing techniques, including monitoring efficiency and accuracy. With the goal of identifying the gaps and examining the opportunities for UAV-based orchard management, this study also discusses the performance of emerging technologies and compare similar research providing technical and comprehensive support for the further exploitation of UAVs and a revolution in orchard management.

Photophysical properties of push–pull 8-aryl-deoxyguanosine probes within duplex and G-quadruplex structures

2016 ◽  
Vol 4 (14) ◽  
pp. 2915-2924 ◽  
Author(s):  
Darian J. M. Blanchard ◽  
Kaila L. Fadock ◽  
Michael Sproviero ◽  
Prashant S. Deore ◽  
Thomas Z. Cservenyi ◽  
...  
Keyword(s):  
Photophysical Properties ◽  
Sensing Applications ◽  
G Quadruplex ◽  
Viscosity Sensing

Acceptor aryl groups at the 8-position of 2′-deoxyguanosine (dG) generate visibly emissive 8aryldG probes, which provide viscosity-sensing applications within oligonucleotides.

Three-dimensional/two-dimensional photonic crystal hydrogels for biosensing

2021 ◽  
Author(s):  
Peiyan Shen ◽  
Yuqi Zhang ◽  
Zhongyu Cai ◽  
Ruixiang Liu ◽  
Xiaoying Xu ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystals ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Stimuli Responsive ◽  
Dimensional Photonic Crystal ◽  
Sensing System ◽  
Sensing Applications ◽  
Responsive Hydrogels ◽  
Two Dimensional Photonic Crystal

Photonic crystals (PCs) have attracted intense interest for sensing applications. Photonic crystal hydrogels (PCHs) consist of both periodic PCs and stimuli-responsive hydrogels, which can act as a sensing system for...

Computer simulation study about the dependence of amorphous silicon photonic waveguides efficiency on the material quality

2020 ◽  
Vol 90 (3) ◽  
pp. 30502
Author(s):  
Alessandro Fantoni ◽  
João Costa ◽  
Paulo Lourenço ◽  
Manuela Vieira
Keyword(s):  
Amorphous Silicon ◽  
High Throughput Screening ◽  
Simulation Analysis ◽  
Low Cost ◽  
Deposition Process ◽  
Large Area ◽  
Sidewall Roughness ◽  
Sensing Applications ◽  
Fabrication Defects ◽  
The Impact

Amorphous silicon PECVD photonic integrated devices are promising candidates for low cost sensing applications. This manuscript reports a simulation analysis about the impact on the overall efficiency caused by the lithography imperfections in the deposition process. The tolerance to the fabrication defects of a photonic sensor based on surface plasmonic resonance is analysed. The simulations are performed with FDTD and BPM algorithms. The device is a plasmonic interferometer composed by an a-Si:H waveguide covered by a thin gold layer. The sensing analysis is performed by equally splitting the input light into two arms, allowing the sensor to be calibrated by its reference arm. Two different 1 × 2 power splitter configurations are presented: a directional coupler and a multimode interference splitter. The waveguide sidewall roughness is considered as the major negative effect caused by deposition imperfections. The simulation results show that plasmonic effects can be excited in the interferometric waveguide structure, allowing a sensing device with enough sensitivity to support the functioning of a bio sensor for high throughput screening. In addition, the good tolerance to the waveguide wall roughness, points out the PECVD deposition technique as reliable method for the overall sensor system to be produced in a low-cost system. The large area deposition of photonics structures, allowed by the PECVD method, can be explored to design a multiplexed system for analysis of multiple biomarkers to further increase the tolerance to fabrication defects.

Sign in / Sign up

Export Citation Format

Share Document