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Sensors, Volume 21, Issue 20

October-2 2021 - 248 articles

Cover Story: Accurate indoor material mapping in buildings and industrial halls with indoor self-localization systems has received receiving increasing attention in recent years, with the objective of providing enhanced information to emergency dispatchers in the case of disasters, such as indoor fires. These systems require fixed reference points (landmarks) in the rooms, comparable to lighthouses on the coast, for navigation and reliable results. Particularly in harsh environments, the employment of chipless landmarks is promising because of their robustness and predictability. To enhance their detection and identification, we propose an iterative algorithm based on the low-rank plus sparse recovery approach to separate strong environmental clutter from the frequency signature of two chipless RFID landmarks with complementary operation at W-band. View this paper
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Articles (248)

  • Article
  • Open Access
10 Citations
3,148 Views
25 Pages

19 October 2021

In this paper, two novel consistency vectors are proposed, which when combined with appropriate machine learning algorithms, can be used to adapt the Spectral Kurtosis technology for optimum gearbox damage diagnosis in varying operating conditions. M...

  • Article
  • Open Access
10 Citations
2,723 Views
16 Pages

19 October 2021

Sandy range land refers to a major component of grassland area types in the semi-arid area of northern China. Monitoring of vegetation and land surface temperature (LST) using remote sensing technology can help determine the degree of desertification...

  • Article
  • Open Access
21 Citations
11,476 Views
19 Pages

19 October 2021

Previous studies have found that the non-invasive blood pressure measurement method based on the oscillometric method is inaccurate when an arrhythmia occurs. Therefore, we propose a high-sensitivity pulse sensor that can measure the hemodynamic char...

  • Article
  • Open Access
5 Citations
3,925 Views
10 Pages

19 October 2021

Background: The HUMAC Balance System (HBS) offers valid measurement of balance, and the arm crank exercise test (ACE) is a valid measure of physiological capacity. Neither have been used to evaluate associations between balance and physiological capa...

  • Article
  • Open Access
7 Citations
3,200 Views
15 Pages

The Experimental Verification of Direct-Write Silver Conductive Grid and ARIMA Time Series Analysis for Crack Propagation

  • Artur Kurnyta,
  • Marta Baran,
  • Paulina Kurnyta-Mazurek,
  • Kamil Kowalczyk,
  • Michał Dziendzikowski and
  • Krzysztof Dragan

19 October 2021

The paper presents experimental verification of customized resistive crack propagation sensors as an alternative method for other common structural health monitoring (SHM) techniques. Most of these are sensitive to changes in the sensor network confi...

  • Review
  • Open Access
59 Citations
8,961 Views
21 Pages

Detecting Fall Risk and Frailty in Elders with Inertial Motion Sensors: A Survey of Significant Gait Parameters

  • Luisa Ruiz-Ruiz,
  • Antonio R. Jimenez,
  • Guillermo Garcia-Villamil and
  • Fernando Seco

19 October 2021

In the elderly, geriatric problems such as the risk of fall or frailty are a challenge for society. Patients with frailty present difficulties in walking and higher fall risk. The use of sensors for gait analysis allows the detection of objective par...

  • Article
  • Open Access
9 Citations
3,642 Views
21 Pages

19 October 2021

The necessity of caring for elderly people is increasing. Great efforts are being made to enable the elderly population to remain independent for as long as possible. Technologies are being developed to monitor the daily activities of a person to det...

  • Article
  • Open Access
9 Citations
4,260 Views
17 Pages

Microwave Tomography Using Neural Networks for Its Application in an Industrial Microwave Drying System

  • Rahul Yadav,
  • Adel Omrani,
  • Guido Link,
  • Marko Vauhkonen and
  • Timo Lähivaara

19 October 2021

The article presents an application of microwave tomography (MWT) in an industrial drying system to develop tomographic-based process control. The imaging modality is applied to estimate moisture distribution in a polymer foam undergoing drying proce...

  • Article
  • Open Access
3 Citations
4,235 Views
35 Pages

Characterization of Temperature Gradients According to Height in a Baroque Church by Means of Wireless Sensors

  • Sandra Ramírez,
  • Manuel Zarzo,
  • Angel Perles and
  • Fernando-Juan García-Diego

19 October 2021

The baroque church of Saint Thomas and Saint Philip Neri (Valencia, Spain), which was built between 1727 and 1736, contains valuable paintings by renowned Spanish artists. Due to the considerable height of the central nave, the church can experience...

  • Article
  • Open Access
55 Citations
4,771 Views
17 Pages

Multi-Agent Systems in Fog–Cloud Computing for Critical Healthcare Task Management Model (CHTM) Used for ECG Monitoring

  • Ammar Awad Mutlag,
  • Mohd Khanapi Abd Ghani,
  • Mazin Abed Mohammed,
  • Abdullah Lakhan,
  • Othman Mohd,
  • Karrar Hameed Abdulkareem and
  • Begonya Garcia-Zapirain

19 October 2021

In the last decade, the developments in healthcare technologies have been increasing progressively in practice. Healthcare applications such as ECG monitoring, heartbeat analysis, and blood pressure control connect with external servers in a manner c...

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Sensors - ISSN 1424-8220