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Sensors, Volume 20, Issue 23

December-1 2020 - 295 articles

Cover Story: Conventional mechanical Fourier transform spectrometers (FTSs) measure absorption and dispersion spectra of gas-phase samples with very long measurement times to obtain time-resolved spectra with a good spectral resolution. Here, we present a mid-infrared dual-comb-based FTS providing broadband absorption and dispersion spectra with a spectral resolution of 5 GHz, a temporal resolution of 20 μs, and a wavelength coverage of 300 cm−1 in a measurement time of a few minutes. The spectrometer is used to monitor the reaction dynamics of methane and ethane in an electrical plasma discharge in dynamic conditions. The results demonstrate a new analytical approach for measuring rapid molecular changes in chemical reactions. This approach is interesting for chemical kinetic research, in particular for the combustion and plasma analysis community. View this paper
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Articles (295)

  • Article
  • Open Access
29 Citations
6,107 Views
20 Pages

Enhancing Classification Performance of fNIRS-BCI by Identifying Cortically Active Channels Using the z-Score Method

  • Hammad Nazeer,
  • Noman Naseer,
  • Aakif Mehboob,
  • Muhammad Jawad Khan,
  • Rayyan Azam Khan,
  • Umar Shahbaz Khan and
  • Yasar Ayaz

7 December 2020

A state-of-the-art brain–computer interface (BCI) system includes brain signal acquisition, noise removal, channel selection, feature extraction, classification, and an application interface. In functional near-infrared spectroscopy-based BCI (...

  • Article
  • Open Access
10 Citations
4,752 Views
18 Pages

7 December 2020

In recent years, Image-Guide Navigation Systems (IGNS) have become an important tool for various surgical operations. In the preparations for planning a surgical path, verifying the location of a lesion, etc., it is an essential tool; in operations s...

  • Article
  • Open Access
9 Citations
4,473 Views
11 Pages

Physical Demands of U10 Players in a 7-a-Side Soccer Tournament Depending on the Playing Position and Level of Opponents in Consecutive Matches Using Global Positioning Systems (GPS)

  • Antonio Hernandez-Martin,
  • Javier Sanchez-Sanchez,
  • Jose Luis Felipe,
  • Samuel Manzano-Carrasco,
  • Carlos Majano,
  • Leonor Gallardo and
  • Jorge Garcia-Unanue

6 December 2020

The aim of this study was to analyse the physical demands of U10 players in a 7-a-side-soccer tournament based on the playing positions in 6 consecutive matches by global positioning systems (GPS). Variables of total distance, relative distance in di...

  • Article
  • Open Access
13 Citations
4,553 Views
15 Pages

6 December 2020

Airborne laser scanning (ALS) point cloud has been widely used in various fields, for it can acquire three-dimensional data with a high accuracy on a large scale. However, due to the fact that ALS data are discretely, irregularly distributed and cont...

  • Article
  • Open Access
2 Citations
2,166 Views
16 Pages

Enhanced Tomographic Sensing Multimodality with a Crystal Analyzer

  • Alexey Buzmakov,
  • Marina Chukalina,
  • Irina Dyachkova,
  • Anastasia Ingacheva,
  • Dmitry Nikolaev,
  • Denis Zolotov and
  • Igor Schelokov

6 December 2020

This article demonstrates how a combination of well-known tools—a standard 2D detector (CCD (charge-coupled device) camera) and a crystal analyzer—can improve the multimodality of X-ray imaging and tomographic sensing. The use of a crysta...

  • Review
  • Open Access
35 Citations
9,910 Views
37 Pages

Optical Fiber Sensors by Direct Laser Processing: A Review

  • David Pallarés-Aldeiturriaga,
  • Pablo Roldán-Varona,
  • Luis Rodríguez-Cobo and
  • José Miguel López-Higuera

6 December 2020

The consolidation of laser micro/nano processing technologies has led to a continuous increase in the complexity of optical fiber sensors. This new avenue offers novel possibilities for advanced sensing in a wide set of application sectors and, espec...

  • Letter
  • Open Access
16 Citations
3,703 Views
15 Pages

Discrimination Improvement of a Gas Sensors’ Array Using High-Frequency Quartz Crystal Microbalance Coated with Polymeric Films

  • Marcos Rodríguez-Torres,
  • Víctor Altuzar,
  • Claudia Mendoza-Barrera,
  • Georgina Beltrán-Pérez,
  • Juan Castillo-Mixcóatl and
  • Severino Muñoz-Aguirre

6 December 2020

The discrimination improvement of an array of four highly sensitive 30 MHz gas quartz crystal microbalance (QCM) sensors was performed and compared to a similar system based on a 12-MHz QCM. The sensing polymeric films were ethyl cellulose (EC), poly...

  • Article
  • Open Access
9 Citations
5,159 Views
29 Pages

TensorMoG: A Tensor-Driven Gaussian Mixture Model with Dynamic Scene Adaptation for Background Modelling

  • Synh Viet-Uyen Ha,
  • Nhat Minh Chung,
  • Hung Ngoc Phan and
  • Cuong Tien Nguyen

6 December 2020

Decades of ongoing research have shown that background modelling is a very powerful technique, which is used in intelligent surveillance systems, in order to extract features of interest, known as foregrounds. In order to work with the dynamic nature...

  • Article
  • Open Access
3 Citations
6,022 Views
11 Pages

Application of a Small Unmanned Aerial System to Measure Ammonia Emissions from a Pilot Amine-CO2 Capture System

  • Travis J. Schuyler,
  • Bradley Irvin,
  • Keemia Abad,
  • Jesse G. Thompson,
  • Kunlei Liu and
  • Marcelo I. Guzman

6 December 2020

The quantification of atmospheric gases with small unmanned aerial systems (sUAS) is expanding the ability to safely perform environmental monitoring tasks and quickly evaluate the impact of technologies. In this work, a calibrated sUAS is used to qu...

  • Article
  • Open Access
6 Citations
2,997 Views
16 Pages

A Machining State-Based Approach to Tool Remaining Useful Life Adaptive Prediction

  • Yiming Li,
  • Xiangmin Meng,
  • Zhongchao Zhang and
  • Guiqiu Song

6 December 2020

The traditional predictive model for remaining useful life predictions cannot achieve adaptiveness, which is one of the main problems of said predictions. This paper proposes a LightGBM-based Remaining useful life (RUL) prediction method which consid...

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Sensors - ISSN 1424-8220