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Sensors, Volume 21, Issue 3

February-1 2021 - 347 articles

Cover Story: In the last decade, Wake-up Radio technology has gained more and more importance for IoT applications. This technology is based on an ultra-low-power, always-listening radio receiver that prevents the main IoT transceiver to continuously listen to the channel, lowering its power consumption. On the other hand, LoRa is one of the emerging long-range standards that facilitate the environmental monitoring of wide areas, but generally suffer from high latency in downlink. This paper proposes an original combination of Lora technology and Wake-up radio to improve the performance (latency and energy) of the LoRaWAN downlink transmission. It is also shown that this combination is particularly suitable to nodes that have the capability to harvest surrounding energy. This research is mainly funded by French ANR and takes place in the collaborative project “Wake-Up”. View this paper
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Articles (347)

  • Article
  • Open Access
64 Citations
6,730 Views
24 Pages

Autonomous Vision-Based Primary Distribution Systems Porcelain Insulators Inspection Using UAVs

  • Ehab Ur Rahman,
  • Yihong Zhang,
  • Sohail Ahmad,
  • Hafiz Ishfaq Ahmad and
  • Sayed Jobaer

2 February 2021

The early detection of damaged (partially broken) outdoor insulators in primary distribution systems is of paramount importance for continuous electricity supply and public safety. Unmanned aerial vehicles (UAVs) present a safer, autonomous, and effi...

  • Communication
  • Open Access
4 Citations
3,545 Views
13 Pages

2 February 2021

Over half of older adult falls are caused by tripping. Many of these trips are likely due to obstacles present on walkways that put older adults or other individuals with low foot clearance at risk. Yet, Minimum Foot Clearance (MFC) values have not b...

  • Article
  • Open Access
1 Citations
3,859 Views
12 Pages

Changes of Corneal Biomechanical Properties upon Exclusive Ytt-/Sr-90 Irradiation of Pterygium

  • Fritz Rigendinger,
  • Daniel M. Aebersold,
  • Zeljka Cvejic and
  • Bojan Pajic

2 February 2021

Background: It is known that pterygia above a certain size cause astigmatism and other aberrations of the human cornea and thus impair the quality of vision. Exclusive Sr-/Ytt-90 beta irradiation is a highly effective treatment for primary pterygia....

  • Communication
  • Open Access
14 Citations
6,884 Views
11 Pages

Gradiometer Using Separated Diamond Quantum Magnetometers

  • Yuta Masuyama,
  • Katsumi Suzuki,
  • Akira Hekizono,
  • Mitsuyasu Iwanami,
  • Mutsuko Hatano,
  • Takayuki Iwasaki and
  • Takeshi Ohshima

2 February 2021

The negatively charged nitrogen-vacancy (NV) center in diamonds is known as the spin defect and using its electron spin, magnetometry can be realized even at room temperature with extremely high sensitivity as well as a high dynamic range. However, a...

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

A 3D Informational Database for Automatic Archiving of Archaeological Pottery Finds

  • Luca Di Angelo,
  • Paolo Di Stefano,
  • Emanuele Guardiani and
  • Anna Eva Morabito

2 February 2021

From archaeological excavations, huge quantities of material are recovered, usually in the form of fragments. Their correct interpretation and classification are laborious and time-consuming and requires measurement, analysis and comparison of severa...

  • Article
  • Open Access
19 Citations
3,987 Views
17 Pages

2 February 2021

Prefabricated buildings are widely used because of their green environmental protection and high degree of industrialization. However, in construction process, there are some defects such as small wireless network coverage, high-energy consumption, i...

  • Article
  • Open Access
19 Citations
7,809 Views
30 Pages

2 February 2021

Coriolis mass flowmeters are highly customized products involving high-degree fluid-structure coupling dynamics and high-precision manufacture. The typical delay from from order to shipment is at least 4 months. This paper presents some important des...

  • Article
  • Open Access
49 Citations
8,112 Views
23 Pages

A-WEAR Bracelet for Detection of Hand Tremor and Bradykinesia in Parkinson’s Patients

  • Asma Channa,
  • Rares-Cristian Ifrim,
  • Decebal Popescu and
  • Nirvana Popescu

2 February 2021

Parkinson’s disease patients face numerous motor symptoms that eventually make their life different from those of normal healthy controls. Out of these motor symptoms, tremor and bradykinesia, are relatively prevalent in all stages of this disease. T...

  • Article
  • Open Access
1 Citations
3,408 Views
12 Pages

2 February 2021

This paper examines the potential deployment of a 10 mm × 10 mm × 1 mm cadmium telluride detector for strontium-90 measurement in groundwater boreholes at nuclear decommissioning sites. Geant4 simulation was used to model the deployment of the detect...

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Sensors - ISSN 1424-8220