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Sensors, Volume 20, Issue 10

2020 May-2 - 261 articles

Cover Story: Diffuse optical tomography is a non-invasive photonics-based imaging technology suited to functional brain imaging. Recent developments have proven the possibility to integrate time-resolved detectors inside the probe, in direct contact with the tissue under investigation, maximizing light harvesting and reducing system complexity. We have developed a system based on 8 probe-hosted SiPM detectors and 6 light injection fibers. Using 2 wavelengths permits quantifying both oxy- and deoxy-hemoglobin concentration evolution in the tissue. An automatic switch enables a complete tomographic acquisition to be performed in less than one second. The system was challenged against two in vivo tests: arm cuff occlusion and motor cortex brain activation. The results show that the tomographic system makes it possible to follow the evolution of brain activation over time with a 1 s resolution. View this paper.
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Articles (261)

  • Article
  • Open Access
17 Citations
5,084 Views
14 Pages

Comparison of Trotting Stance Detection Methods from an Inertial Measurement Unit Mounted on the Horse’s Limb

  • Marie Sapone,
  • Pauline Martin,
  • Khalil Ben Mansour,
  • Henry Château and
  • Frédéric Marin

25 May 2020

The development of on-board sensors, such as inertial measurement units (IMU), has made it possible to develop new methods for analyzing horse locomotion to detect lameness. The detection of spatiotemporal events is one of the keystones in the analys...

  • Article
  • Open Access
106 Citations
7,051 Views
16 Pages

25 May 2020

Automatic detection of intact tomatoes on plants is highly expected for low-cost and optimal management in tomato farming. Mature tomato detection has been wildly studied, while immature tomato detection, especially when occluded with leaves, is diff...

  • Article
  • Open Access
22 Citations
5,854 Views
21 Pages

25 May 2020

To make canopy information measurements in modern standardized apple orchards, a method for canopy information measurements based on unmanned aerial vehicle (UAV) multimodal information is proposed. Using a modern standardized apple orchard as the st...

  • Article
  • Open Access
20 Citations
5,079 Views
22 Pages

Building Dynamic Communities of Interest for Internet of Things in Smart Cities

  • Monira N. Aldelaimi,
  • M. Anwar Hossain and
  • Mohammed F. Alhamid

25 May 2020

The Internet of things (IoT) is a growing area of research in the context of smart cities. It links a city’s physical objects that are equipped with embedded sensing, communicating, and computing technology. These objects possess the capability...

  • Article
  • Open Access
5 Citations
4,110 Views
12 Pages

Bragg Peak Localization with Piezoelectric Sensors for Proton Therapy Treatment

  • Jorge Otero,
  • Ivan Felis,
  • Alicia Herrero,
  • José A. Merchán and
  • Miguel Ardid

25 May 2020

A full chain simulation of the acoustic hadrontherapy monitoring for brain tumours is presented in this work. For the study, a proton beam of 100 MeV is considered. In the first stage, Geant4 is used to simulate the energy deposition and to study the...

  • Viewpoint
  • Open Access
157 Citations
14,448 Views
20 Pages

25 May 2020

In recent years, artificial intelligence (AI) has started to manifest itself at an unprecedented pace. With highly sophisticated capabilities, AI has the potential to dramatically change our cities and societies. Despite its growing importance, the u...

  • Article
  • Open Access
6 Citations
3,448 Views
18 Pages

25 May 2020

Micro-Doppler generated by the micromotion of a target contaminates the inverse synthetic aperture radar (ISAR) image heavily. To acquire a clear ISAR image, removing the Micro-Doppler is an indispensable task. By exploiting the sparsity of the ISAR...

  • Article
  • Open Access
268 Citations
18,370 Views
24 Pages

25 May 2020

Agriculture and livestock play a vital role in social and economic stability. Food safety and transparency in the food supply chain are a significant concern for many people. Internet of Things (IoT) and blockchain are gaining attention due to their...

  • Article
  • Open Access
23 Citations
4,947 Views
24 Pages

Routing Based Multi-Agent System for Network Reliability in the Smart Microgrid

  • Niharika Singh,
  • Irraivan Elamvazuthi,
  • Perumal Nallagownden,
  • Gobbi Ramasamy and
  • Ajay Jangra

25 May 2020

Microgrids help to achieve power balance and energy allocation optimality for the defined load networks. One of the major challenges associated with microgrids is the design and implementation of a suitable communication-control architecture that can...

  • Article
  • Open Access
8 Citations
3,736 Views
18 Pages

25 May 2020

Unmanned aerial vehicles (UAVs) allow better coverage, enhanced connectivity, and elongated lifetime when used in telecommunications. However, these features are predominately affected by the policies used for sharing resources amongst the involved n...

  • Comment
  • Open Access
8 Citations
3,833 Views
5 Pages

25 May 2020

The recent paper “Hurdle Clearance Detection and Spatiotemporal Analysis in 400 Meters Hurdles Races Using Shoe-Mounted Magnetic and Inertial Sensor” (Sensors 2020, 20, 354) proposes a wearable system based on a foot-worn miniature inerti...

  • Article
  • Open Access
6 Citations
3,541 Views
20 Pages

25 May 2020

Deep-sea environmental datasets are ever-increasing in size and diversity, as technological advances lead monitoring studies towards long-term, high-frequency data acquisition protocols. This study presents examples of pre-analysis data treatment ste...

  • Review
  • Open Access
84 Citations
14,855 Views
26 Pages

Hollow-Core Photonic Crystal Fiber Gas Sensing

  • Ruowei Yu,
  • Yuxing Chen,
  • Lingling Shui and
  • Limin Xiao

25 May 2020

Fiber gas sensing techniques have been applied for a wide range of industrial applications. In this paper, the basic fiber gas sensing principles and the development of different fibers have been introduced. In various specialty fibers, hollow-core p...

  • Review
  • Open Access
42 Citations
10,580 Views
26 Pages

25 May 2020

Most existing augmented reality (AR) applications are suitable for cases in which only a small number of real world entities are involved, such as superimposing a character on a single surface. In this case, we only need to calculate pose of the came...

  • Article
  • Open Access
18 Citations
4,493 Views
19 Pages

25 May 2020

The integration of unmanned aerial vehicles (UAVs) with a cognitive radio (CR) technology can improve the spectrum utilization. However, UAV network services demand reliable and secure communications, along with energy efficiency to prolong battery l...

  • Article
  • Open Access
211 Citations
17,871 Views
23 Pages

Remote Monitoring of Human Vital Signs Based on 77-GHz mm-Wave FMCW Radar

  • Yong Wang,
  • Wen Wang,
  • Mu Zhou,
  • Aihu Ren and
  • Zengshan Tian

25 May 2020

In recent years, non-contact radar detection technology has been able to achieve long-term and long-range detection for the breathing and heartbeat signals. Compared with contact-based detection methods, it brings a more comfortable and a faster expe...

  • Review
  • Open Access
31 Citations
4,948 Views
19 Pages

Selfishness in Vehicular Delay-Tolerant Networks: A Review

  • Ghani-Ur Rehman,
  • Anwar Ghani,
  • Shad Muhammad,
  • Madhusudan Singh and
  • Dhananjay Singh

25 May 2020

Various operational communication models are using Delay-Tolerant Network as a communication tool in recent times. In such a communication paradigm, sometimes there are disconnections and interferences as well as high delays like vehicle Ad hoc netwo...

  • Article
  • Open Access
5 Citations
3,017 Views
15 Pages

25 May 2020

A biological sensor for detection and identification of bacterial cells, including a resonator with a lateral electric field based on PZT ceramics was experimentally investigated. For bacterial immunodetection the frequency dependencies of the electr...

  • Article
  • Open Access
46 Citations
5,297 Views
14 Pages

Characterisation of Ex Vivo Liver Thermal Properties for Electromagnetic-Based Hyperthermic Therapies

  • Nuno P. Silva,
  • Anna Bottiglieri,
  • Raquel C. Conceição,
  • Martin O’Halloran and
  • Laura Farina

25 May 2020

Electromagnetic-based hyperthermic therapies induce a controlled increase of temperature in a specific tissue target in order to increase the tissue perfusion or metabolism, or even to induce cell necrosis. These therapies require accurate knowledge...

  • Letter
  • Open Access
23 Citations
5,542 Views
9 Pages

Terahertz Gas-Phase Spectroscopy Using a Sub-Wavelength Thick Ultrahigh-Q Microresonator

  • Dominik Walter Vogt,
  • Angus Harvey Jones and
  • Rainer Leonhardt

25 May 2020

The terahertz spectrum provides tremendous opportunities for broadband gas-phase spectroscopy, as numerous molecules exhibit strong fundamental resonances in the THz frequency range. However, cutting-edge THz gas-phase spectrometer require cumbersome...

  • Comment
  • Open Access
3 Citations
2,762 Views
2 Pages

Comment on the Article "A Lightweight and Low-Power UAV-Borne Ground Penetrating Radar Design for Landmine Detection"

  • Yuri Álvarez López,
  • María García Fernández and
  • Fernando Las-Heras Andrés

25 May 2020

This reply aims to correct some incomplete/incorrect information provided in the article "A Lightweight and Low-Power UAV-Borne Ground Penetrating Radar Design for Landmine Detection", when the authors compare their results with some state-of-the-art...

  • Article
  • Open Access
1 Citations
4,389 Views
18 Pages

A Comparison of Different Counting Methods for a Holographic Particle Counter: Designs, Validations and Results

  • Georg Brunnhofer,
  • Isabella Hinterleitner,
  • Alexander Bergmann and
  • Martin Kraft

25 May 2020

Digital Inline Holography (DIH) is used in many fields of Three-Dimensional (3D) imaging to locate micro or nano-particles in a volume and determine their size, shape or trajectories. A variety of different wavefront reconstruction approaches have be...

  • Article
  • Open Access
13 Citations
7,814 Views
14 Pages

25 May 2020

We present an analysis of carrier dynamics of the single-photon detection process, i.e., from Geiger mode pulse generation to its quenching, in a single-photon avalanche diode (SPAD). The device is modeled by a parallel circuit of a SPAD and a capaci...

  • Article
  • Open Access
9 Citations
3,560 Views
12 Pages

24 May 2020

This study presents an innovative technique for the in situ analysis of aquatic biochemical elements detected through wet chemical processes. A new compact in situ phosphate analyzer based on sequential injection analysis, liquid waveguide capillary...

  • Article
  • Open Access
15 Citations
4,178 Views
17 Pages

Evaluation of Real-Time PPP-Based Tide Measurement Using IGS Real-Time Service

  • Mingwei Di,
  • Anmin Zhang,
  • Bofeng Guo,
  • Jiali Zhang,
  • Rongxia Liu and
  • Mengyuan Li

24 May 2020

Tide data plays a key role in many marine scientific research fields such as seafloor topography measurement and navigation safety. To obtain reliable tide data, various methods have been proposed, e.g., tide station measurement, satellite altimeter...

  • Article
  • Open Access
43 Citations
6,480 Views
16 Pages

Integration of Sentinel-1 and Sentinel-2 Data for Land Cover Mapping Using W-Net

  • Massimiliano Gargiulo,
  • Domenico A. G. Dell’Aglio,
  • Antonio Iodice,
  • Daniele Riccio and
  • Giuseppe Ruello

24 May 2020

In this paper, we present a new approach to the fusion of Sentinel 1 (S1) and Sentinel 2 (S2) data for land cover mapping. The proposed solution aims at improving methods based on Sentinel 2 data, that are unusable in case of cloud cover. This goal i...

  • Article
  • Open Access
15 Citations
5,588 Views
14 Pages

24 May 2020

A joint demosaicing and denoising task refers to the task of simultaneously reconstructing and denoising a color image from a patterned image obtained by a monochrome image sensor with a color filter array. Recently, inspired by the success of deep l...

  • Article
  • Open Access
4 Citations
4,112 Views
18 Pages

24 May 2020

Biped robots are similar to human beings and have broad application prospects in the fields of family service, disaster rescue and military affairs. However, simplified models and fixed center of mass (COM) used in previous research ignore the large-...

  • Article
  • Open Access
23 Citations
6,615 Views
19 Pages

24 May 2020

Hand gesture classification and finger angle estimation are both critical for intuitive human–computer interaction. However, most approaches study them in isolation. We thus propose a dual-output deep learning model to enable simultaneous hand...

  • Communication
  • Open Access
5 Citations
4,742 Views
12 Pages

Exploring the Effects of Various Polymeric Backbones on the Performance of a Hydroxyaromatic 1,2,3-Triazole Anion Sensor

  • Aikohi Ugboya,
  • Khristal Monroe,
  • Unodinma Ofulue,
  • Kayley Yates,
  • Debanjana Ghosh,
  • Shainaz M. Landge,
  • Rafael Lopes Quirino and
  • Karelle S. Aiken

24 May 2020

Polymeric chemosensors are vital sensing tools because of higher sensitivity compared to their monomeric counterparts and tunable mechanical properties. This study focuses on the incorporation of a hydroxyaromatic 1,2,3-triazole sensor, 2-(4-phenyl 1...

  • Article
  • Open Access
61 Citations
13,364 Views
11 Pages

Artificial Intelligence Applied to a Robotic Dairy Farm to Model Milk Productivity and Quality based on Cow Data and Daily Environmental Parameters

  • Sigfredo Fuentes,
  • Claudia Gonzalez Viejo,
  • Brendan Cullen,
  • Eden Tongson,
  • Surinder S. Chauhan and
  • Frank R. Dunshea

24 May 2020

Increased global temperatures and climatic anomalies, such as heatwaves, as a product of climate change, are impacting the heat stress levels of farm animals. These impacts could have detrimental effects on the milk quality and productivity of dairy...

  • Article
  • Open Access
34 Citations
4,605 Views
23 Pages

24 May 2020

Aimed at improving upon the disadvantages of the single centralized Kalman filter for integrated navigation, including its fragile robustness and low solution accuracy, a nonlinear double model based on the improved decentralized federated extended K...

  • Article
  • Open Access
3 Citations
6,048 Views
25 Pages

24 May 2020

The re-entry trajectory of maneuvering vehicles with medium to high hypersonic lift-to-drag ratios is generally planned using quasi-equilibrium flight conditions known from Space Shuttles. They may exhibit an oscillation re-entry phenomenon termed sk...

  • Article
  • Open Access
4 Citations
5,295 Views
18 Pages

24 May 2020

In this paper, we propose a novel approach for the detection of abnormal signals from multiple respiration signals. An ultrawide-band (UWB) radar was used to acquire respiration signals that represent a distance from the chest to the radar sensor, i....

  • Article
  • Open Access
18 Citations
6,341 Views
26 Pages

24 May 2020

Situation awareness (SA) is crucial for safe driving. It is all about perception, comprehension of current situations and projection of the future status. It is demanding for drivers to constantly maintain SA by checking for potential hazards while p...

  • Article
  • Open Access
5 Citations
3,970 Views
18 Pages

Ferroelectret-based Hydrophone Employed in Oil Identification—A Machine Learning Approach

  • Daniel R. de Luna,
  • T.T.C. Palitó,
  • Y.A.O. Assagra,
  • R.A.P. Altafim,
  • J.P. Carmo,
  • R.A.C. Altafim,
  • A.A.O. Carneiro and
  • Vicente A. de Sousa

24 May 2020

This work focuses on acoustic analysis as a way of discriminating mineral oil, providing a robust technique, immune to electromagnetic noise, and in some cases, depending on the applied sensor, a low-cost technique. Thus, we propose a new method for...

  • Article
  • Open Access
6 Citations
4,060 Views
15 Pages

Directional Response of Randomly Dispersed Carbon Nanotube Strain Sensors

  • Alfredo Güemes,
  • Angel Renato Pozo Morales,
  • Antonio Fernandez-Lopez,
  • Xoan Xose F. Sanchez-Romate,
  • Maria Sanchez and
  • Alejandro Ureña

24 May 2020

Tests on a double lap bonded joint, with transverse strips of randomly oriented carbon nanotubes (CNT) sprayed onto an epoxy adhesive film, showed a positive increment in electrical resistance under tensile load, even though the transverse strains we...

  • Article
  • Open Access
22 Citations
4,797 Views
20 Pages

24 May 2020

Radio frequency communication technology has not only greatly improved public network service, but also developed a new technological route for indoor navigation service. However, there is a gap between the precision and accuracy of indoor navigation...

  • Article
  • Open Access
13 Citations
4,622 Views
18 Pages

BIM in People2People and Things2People Interactive Process

  • Bruno Mataloto,
  • João C. Ferreira,
  • Ricardo Resende,
  • Rita Moura and
  • Sílvia Luís

24 May 2020

In this research work, we present an IoT solution to environment variables using a LoRa transmission technology to give real-time information to users in a Things2People process and achieve savings by promoting behavior changes in a People2People pro...

  • Article
  • Open Access
9 Citations
3,497 Views
13 Pages

23 May 2020

We report on the development of a method for measuring the permittivity and conductivity of fluids inside a sealed tank (or a pipe) by using an embedded coaxial probe. Permittivity and conductivity in the frequency range 600 MHz to 6 GHz are determin...

  • Article
  • Open Access
2 Citations
4,263 Views
17 Pages

Project Gatekeeper: An Entrance Control System Embedded Radiation Detection Capability for Security Applications

  • Peter G. Martin,
  • Yannick Verbelen,
  • Elia Sciama Bandel,
  • Mark Andrews and
  • Thomas B. Scott

23 May 2020

Threat assessments continue to conclude that terrorist groups and individuals as well as those wanting to cause harm to society have the ambition and increasing means to acquire unconventional weapons such as improvised nuclear explosive devices and...

  • Review
  • Open Access
11 Citations
13,697 Views
14 Pages

23 May 2020

Target tracking and interception in a dynamic world proves to be a fundamental challenge faced by both animals and artificial systems. To track moving objects under natural conditions, agents must employ strategies to mitigate interference and condit...

  • Article
  • Open Access
1 Citations
3,905 Views
23 Pages

RESPOnSE—A Framework for Enforcing Risk-Aware Security Policies in Constrained Dynamic Environments

  • Christina Michailidou,
  • Vasileios Gkioulos,
  • Andrii Shalaginov,
  • Athanasios Rizos and
  • Andrea Saracino

23 May 2020

The enforcement of fine-grained access control policies in constrained dynamic networks can become a challenging task. The inherit constraints present in those networks, which result from the limitations of the edge devices in terms of power, computa...

  • Article
  • Open Access
19 Citations
5,098 Views
14 Pages

23 May 2020

For autonomous vehicles (AV), the ability to share information about their surroundings is crucial. With Level 4 and 5 autonomy in sight, solving the challenge of organization and efficient storing of data, coming from these connected platforms, beco...

  • Article
  • Open Access
37 Citations
3,783 Views
17 Pages

The Contribution of Elastic Wave NDT to the Characterization of Modern Cementitious Media

  • Gerlinde Lefever,
  • Didier Snoeck,
  • Nele De Belie,
  • Sandra Van Vlierberghe,
  • Danny Van Hemelrijck and
  • Dimitrios G. Aggelis

23 May 2020

To mitigate autogenous shrinkage in cementitious materials and simultaneously preserve the material’s mechanical performance, superabsorbent polymers and nanosilica are included in the mixture design. The use of the specific additives influence...

  • Article
  • Open Access
58 Citations
12,464 Views
19 Pages

Nextmed: Automatic Imaging Segmentation, 3D Reconstruction, and 3D Model Visualization Platform Using Augmented and Virtual Reality

  • Santiago González Izard,
  • Ramiro Sánchez Torres,
  • Óscar Alonso Plaza,
  • Juan Antonio Juanes Méndez and
  • Francisco José García-Peñalvo

23 May 2020

The visualization of medical images with advanced techniques, such as augmented reality and virtual reality, represent a breakthrough for medical professionals. In contrast to more traditional visualization tools lacking 3D capabilities, these system...

  • Article
  • Open Access
5 Citations
3,226 Views
16 Pages

23 May 2020

As the failure-induced component (FIC) in the vibration signals of bearings transmits through housings and shafts, potential phase synchronization is excited among multichannel signals. As phase synchrony analysis (PSA) does not involve the chaotic b...

  • Article
  • Open Access
4 Citations
3,551 Views
18 Pages

23 May 2020

Objective is a joint primary and secondary code (SC) acquisition estimator of tiered Global Navigation Satellite Systems (GNSS) signals. The estimator is based on the Parallel Code Search algorithm (PCS) combined with the Single-Block-Zero-Padding (S...

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Sensors - ISSN 1424-8220