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Sensors, Volume 20, Issue 15

August-1 2020 - 290 articles

Cover Story: The adoption of Internet of Things (IoT) technologies in scenarios such as agriculture, coast preservation or connectivity survival against disasters involves the deployment of IoT devices in remote areas. The uneven relief of this zone makes it difficult to provide uniform coverage even using low-power wide area network (LPWAN) solutions, such as LoRa, due to the blockage of communication paths. In this work, we aim at mounting LPWAN gateways in drones in order to generate airborne network segments providing enhanced connectivity to sensor nodes wherever needed. The presented architecture takes advantage of multi-access edge computing (MEC) technologies to enable data preprocessing by virtualizing network functions on-board. Results showed notable coverage improvements by employing drone-mounted LoRa gateways when compared to traditional fixed LoRa infrastructure. View this paper
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Articles (290)

  • Article
  • Open Access
8 Citations
4,349 Views
30 Pages

4 August 2020

Carrying out the task of the exploration of a scene by an autonomous robot entails a set of complex skills, such as the ability to create and update a representation of the scene, the knowledge of the regions of the scene which are yet unexplored, th...

  • Article
  • Open Access
42 Citations
8,827 Views
20 Pages

Iterative Learning Control for a Soft Exoskeleton with Hip and Knee Joint Assistance

  • Chunjie Chen,
  • Yu Zhang,
  • Yanjie Li,
  • Zhuo Wang,
  • Yida Liu,
  • Wujing Cao and
  • Xinyu Wu

4 August 2020

Walking on different terrains leads to different biomechanics, which motivates the development of exoskeletons for assisting on walking according to the type of a terrain. The design of a lightweight soft exoskeleton that simultaneously assists multi...

  • Article
  • Open Access
11 Citations
4,676 Views
17 Pages

4 August 2020

The paper proposes a method of automatic detection of parameters of a distribution transformer (model, type, and power) from a distance, based on its low-frequency noise spectra. The spectra are registered by sensors and processed by a method based o...

  • Article
  • Open Access
2 Citations
2,913 Views
15 Pages

4 August 2020

To fulfill the increasing demand on low-latency content distribution, this paper considers content distribution using generation-based network coding with the belief propagation decoder. We propose a framework to design generation-based network codes...

  • Article
  • Open Access
52 Citations
7,350 Views
18 Pages

LoRaWAN Gateway Placement Model for Dynamic Internet of Things Scenarios

  • Nagib Matni,
  • Jean Moraes,
  • Helder Oliveira,
  • Denis Rosário and
  • Eduardo Cerqueira

4 August 2020

Extended Range Wide Area Network (LoRaWAN) has recently gained a lot of attention from the industrial and research community for dynamic Internet of Things (IoT) applications. IoT devices broadcast messages for neighbor gateways that deliver the mess...

  • Article
  • Open Access
15 Citations
5,168 Views
23 Pages

4 August 2020

Land surface temperature (LST) is a critical state variable of land surface energy equilibrium and a key indicator of environmental change such as climate change, urban heat island, and freezing-thawing hazard. The high spatial and temporal resolutio...

  • Article
  • Open Access
14 Citations
7,293 Views
25 Pages

10 MHz Thin-Film PZT-Based Flexible PMUT Array: Finite Element Design and Characterization

  • Jeong Nyeon Kim,
  • Tianning Liu,
  • Thomas N. Jackson,
  • Kyusun Choi,
  • Susan Trolier-McKinstry,
  • Richard L. Tutwiler and
  • Judith A. Todd

4 August 2020

Piezoelectric micromachined ultrasound transducers (PMUT) incorporating lead zirconate titanate PbZr0.52Ti0.48O3 (PZT) thin films were investigated for miniaturized high-frequency ultrasound systems. A recently developed process to remove a PMUT from...

  • Article
  • Open Access
15 Citations
6,172 Views
14 Pages

Wristbands Containing Accelerometers for Objective Arm Swing Analysis in Patients with Parkinson’s Disease

  • Domiciano Rincón,
  • Jaime Valderrama,
  • Maria Camila González,
  • Beatriz Muñoz,
  • Jorge Orozco,
  • Linda Montilla,
  • Yor Castaño and
  • Andrés Navarro

4 August 2020

In patients with Parkinson’s disease (PD), arm swing changes are common, even in the early stages, and these changes are usually evaluated subjectively by an expert. In this article, hypothesize that arm swing changes can be detected using a lo...

  • Article
  • Open Access
20 Citations
4,969 Views
21 Pages

Robust Fine Registration of Multisensor Remote Sensing Images Based on Enhanced Subpixel Phase Correlation

  • Zhen Ye,
  • Jian Kang,
  • Jing Yao,
  • Wenping Song,
  • Sicong Liu,
  • Xin Luo,
  • Yusheng Xu and
  • Xiaohua Tong

4 August 2020

Automatic fine registration of multisensor images plays an essential role in many remote sensing applications. However, it is always a challenging task due to significant radiometric and textural differences. In this paper, an enhanced subpixel phase...

  • Letter
  • Open Access
10 Citations
4,156 Views
11 Pages

4 August 2020

Zn-Co-S ball-in-ball hollow sphere (BHS) was successfully prepared by solvothermal sulfurization method. An efficient strategy to synthesize Zn-Co-S BHS consisted of multilevel structures by controlling the ionic exchange reaction was applied to obta...

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Sensors - ISSN 1424-8220