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Sensors, Volume 20, Issue 5

2020 March-1 - 303 articles

Cover Story: Raman spectroscopy is a powerful optical detection technique widely used in biological research, pharmaceutics, chemical sciences, and many other fields for material characterization. We introduce a freeform-segmented reflector design that works together with a microfluidic lab-on-chip for conventional and surface-enhanced Raman spectroscopy (SERS) analysis to reduce the size and cost compared to traditional bulky Raman equipment. The microfluidic chip consists of three layers: a polymer-based bottom and top sealing layer, and a channel layer for the fluidic sample under test. The maskless reactive ion etched nano-pillars with Au coating are used as the SERS substrate that is integrated inside the microfluidic chamber by UV curing adhesive. By tuning the height of the segmented reflector, we placed the focal point right on the surface of the SERS substrate to obtain the greatest enhancement. View this paper
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Articles (303)

  • Article
  • Open Access
6 Citations
5,938 Views
12 Pages

Prototype of Nitro Compound Vapor and Trace Detector Based on a Capacitive MIS Sensor

  • Nikolay Samotaev,
  • Artur Litvinov,
  • Maya Etrekova,
  • Konstantin Oblov,
  • Dmitrii Filipchuk and
  • Alexey Mikhailov

10 March 2020

A prototype of a nitro compound vapor and trace detector, which uses the pyrolysis method and a capacitive gas sensor based on the metal–insulator–semiconductor (MIS) structure type Pd–SiO2–Si, was developed and manufactured....

  • Article
  • Open Access
30 Citations
6,400 Views
18 Pages

Fast Approximations of Activation Functions in Deep Neural Networks when using Posit Arithmetic

  • Marco Cococcioni,
  • Federico Rossi,
  • Emanuele Ruffaldi and
  • Sergio Saponara

10 March 2020

With increasing real-time constraints being put on the use of Deep Neural Networks (DNNs) by real-time scenarios, there is the need to review information representation. A very challenging path is to employ an encoding that allows a fast processing a...

  • Article
  • Open Access
175 Citations
18,194 Views
13 Pages

Liver Tumor Segmentation in CT Scans Using Modified SegNet

  • Sultan Almotairi,
  • Ghada Kareem,
  • Mohamed Aouf,
  • Badr Almutairi and
  • Mohammed A.-M. Salem

10 March 2020

The main cause of death related to cancer worldwide is from hepatic cancer. Detection of hepatic cancer early using computed tomography (CT) could prevent millions of patients’ death every year. However, reading hundreds or even tens of those C...

  • Article
  • Open Access
7 Citations
4,505 Views
12 Pages

10 March 2020

Recently, the rapid development of the Internet of Things (IoT) has led to an increasing exponential growth of non-scalar data (e.g., images, videos). Local services are far from satisfying storage requirements, and the cloud computing fails to effec...

  • Article
  • Open Access
10 Citations
4,142 Views
11 Pages

10 March 2020

Nanomechanical sensors and their arrays have been attracting significant attention for detecting, discriminating and identifying target analytes. The sensing responses can be partially explained by the physical properties of the receptor layers coate...

  • Article
  • Open Access
39 Citations
5,233 Views
12 Pages

An Automatic Bearing Fault Diagnosis Method Based on Characteristics Frequency Ratio

  • Dengyun Wu,
  • Jianwen Wang,
  • Hong Wang,
  • Hongxing Liu,
  • Lin Lai,
  • Tian He and
  • Tao Xie

10 March 2020

Bearing is a key component of satellite inertia actuators such as moment wheel assemblies (MWAs) and control moment gyros (CMGs), and its operating state is directly related to the performance and service life of satellites. However, because of the c...

  • Review
  • Open Access
176 Citations
12,464 Views
33 Pages

Applications of Deep Learning for Dense Scenes Analysis in Agriculture: A Review

  • Qian Zhang,
  • Yeqi Liu,
  • Chuanyang Gong,
  • Yingyi Chen and
  • Huihui Yu

10 March 2020

Deep Learning (DL) is the state-of-the-art machine learning technology, which shows superior performance in computer vision, bioinformatics, natural language processing, and other areas. Especially as a modern image processing technology, DL has been...

  • Article
  • Open Access
56 Citations
7,086 Views
24 Pages

10 March 2020

Different from the traditional healthcare field, Medical Cyber Physical Systems (MCPS) rely more on wireless wearable devices and medical applications to provide better medical services. The secure storage and sharing of medical data are facing great...

  • Article
  • Open Access
11 Citations
4,609 Views
13 Pages

Motion Assessment for Accelerometric and Heart Rate Cycling Data Analysis

  • Hana Charvátová,
  • Aleš Procházka and
  • Oldřich Vyšata

10 March 2020

Motion analysis is an important topic in the monitoring of physical activities and recognition of neurological disorders. The present paper is devoted to motion assessment using accelerometers inside mobile phones located at selected body positions a...

  • Article
  • Open Access
16 Citations
4,720 Views
15 Pages

Ratiometric Strategy for Electrochemical Sensing of Carbaryl Residue in Water and Vegetable Samples

  • Min Zhang,
  • Zeyuan Zhang,
  • Yanjing Yang,
  • Yi Zhang,
  • Yufei Wang and
  • Xinyi Chen

10 March 2020

Accurate analysis of pesticide residue in real samples is essential for food safety and environmental protection. However, a traditional electrochemical sensor based on single-signal output is easily affected by background noise, environmental condit...

  • Article
  • Open Access
26 Citations
6,912 Views
19 Pages

10 March 2020

Due to the process defects and imperfection of drivers, permanent magnet synchronous motors (PMSM) are problematic to control. There is still a lack of effective high-performance control methods for inertial stabilized platforms based on PMSM current...

  • Article
  • Open Access
18 Citations
4,562 Views
18 Pages

Multiuser Chirp Spread Spectrum Transmission in an Underwater Acoustic Channel Applied to an AUV Fleet

  • Christophe Bernard,
  • Pierre-Jean Bouvet,
  • Antony Pottier and
  • Philippe Forjonel

10 March 2020

The objective of this paper is to provide a multiuser transmission technique for underwater acoustic communication in the framework of an Autonomous Underwater Vehicle (AUV) fleet. By using a variant of a Hyperbolically Frequency-Modulated (HFM) sign...

  • Review
  • Open Access
111 Citations
15,618 Views
27 Pages

A Review of Thin-Film Magnetoelastic Materials for Magnetoelectric Applications

  • Xianfeng Liang,
  • Cunzheng Dong,
  • Huaihao Chen,
  • Jiawei Wang,
  • Yuyi Wei,
  • Mohsen Zaeimbashi,
  • Yifan He,
  • Alexei Matyushov,
  • Changxing Sun and
  • Nianxiang Sun

10 March 2020

Since the revival of multiferroic laminates with giant magnetoelectric (ME) coefficients, a variety of multifunctional ME devices, such as sensor, inductor, filter, antenna etc. have been developed. Magnetoelastic materials, which couple the magnetiz...

  • Article
  • Open Access
13 Citations
4,241 Views
16 Pages

10 March 2020

A novel multi-classification method, which integrates the elastic net and probabilistic support vector machine, was proposed to solve this problem in cancer detection with gene expression profile data of platelets, whose problems mainly are a kind of...

  • Article
  • Open Access
13 Citations
4,800 Views
18 Pages

Pedestrian Navigation Method Based on Machine Learning and Gait Feature Assistance

  • Zijun Zhou,
  • Shuqin Yang,
  • Zhisen Ni,
  • Weixing Qian,
  • Cuihong Gu and
  • Zekun Cao

10 March 2020

In recent years, as the mechanical structure of humanoid robots increasingly resembles the human form, research on pedestrian navigation technology has become of great significance for the development of humanoid robot navigation systems. To solve th...

  • Article
  • Open Access
11 Citations
3,824 Views
15 Pages

A Camera Sensors-Based System to Study Drug Effects on In Vitro Motility: The Case of PC-3 Prostate Cancer Cells

  • Maria Colomba Comes,
  • Arianna Mencattini,
  • Davide Di Giuseppe,
  • Joanna Filippi,
  • Michele D’Orazio,
  • Paola Casti,
  • Francesca Corsi,
  • Lina Ghibelli,
  • Corrado Di Natale and
  • Eugenio Martinelli

10 March 2020

Cell motility is the brilliant result of cell status and its interaction with close environments. Its detection is now possible, thanks to the synergy of high-resolution camera sensors, time-lapse microscopy devices, and dedicated software tools for...

  • Article
  • Open Access
6 Citations
5,420 Views
28 Pages

10 March 2020

Although unsupervised representation learning (RL) can tackle the performance deterioration caused by limited labeled data in synthetic aperture radar (SAR) object classification, the neglected discriminative detailed information and the ignored dist...

  • Article
  • Open Access
8 Citations
4,274 Views
17 Pages

10 March 2020

The ambiguity resolution (AR) and validation of the global navigation satellite system (GNSS) have been challenging tasks for some decades. Considering the reliability problem of extra-wide-lane (EWL) ambiguity in the triple-carrier ambiguity resolut...

  • Article
  • Open Access
12 Citations
7,083 Views
20 Pages

Design of a Fully Integrated Inductive Coupling System: A Discrete Approach Towards Sensing Ventricular Pressure

  • Natiely Hernández Sebastián,
  • Noé Villa Villaseñor,
  • Francisco-Javier Renero-Carrillo,
  • Daniela Díaz Alonso and
  • Wilfrido Calleja Arriaga

10 March 2020

In this paper, an alternative strategy for the design of a bidirectional inductive power transfer (IPT) module, intended for the continuous monitoring of cardiac pressure, is presented. This new integrated implantable medical device (IMD) was designe...

  • Article
  • Open Access
4 Citations
3,400 Views
19 Pages

Optimization of a Single Tube Practical Acoustic Thermometer

  • Rok Tavčar,
  • Janko Drnovšek,
  • Jovan Bojkovski and
  • Samo Beguš

10 March 2020

When designing a single tube practical acoustic thermometer (PAT), certain considerations should be addressed for optimal performance. This paper is concerned with the main issues involved in building a reliable PAT. It has to be emphasised that a PA...

  • Article
  • Open Access
16 Citations
7,480 Views
22 Pages

Embedded Bio-Mimetic System for Functional Electrical Stimulation Controlled by Event-Driven sEMG

  • Fabio Rossi,
  • Paolo Motto Ros,
  • Ricardo Maximiliano Rosales and
  • Danilo Demarchi

10 March 2020

The analysis of the surface ElectroMyoGraphic (sEMG) signal for controlling the Functional Electrical Stimulation (FES) therapy is being widely accepted as an active rehabilitation technique for the restoration of neuro-muscular disorders. Portabilit...

  • Article
  • Open Access
17 Citations
5,563 Views
26 Pages

Non-Local SVD Denoising of MRI Based on Sparse Representations

  • Nallig Leal,
  • Eduardo Zurek and
  • Esmeide Leal

10 March 2020

Magnetic Resonance (MR) Imaging is a diagnostic technique that produces noisy images, which must be filtered before processing to prevent diagnostic errors. However, filtering the noise while keeping fine details is a difficult task. This paper prese...

  • Article
  • Open Access
3 Citations
4,456 Views
22 Pages

10 March 2020

This paper presents an approach to analyse the quality, in terms of precision and reliability, of a system which integrates—at the observation-level—landmark positions and GNSS measurements, obtained with a single camera and a digital map...

  • Article
  • Open Access
17 Citations
8,063 Views
22 Pages

Performance Analysis of Geiger–Müller and Cadmium Zinc Telluride Sensors Envisaging Airborne Radiological Monitoring in NORM Sites

  • Jorge Borbinha,
  • Yuriy Romanets,
  • Pedro Teles,
  • José Corisco,
  • Pedro Vaz,
  • Diogo Carvalho,
  • Yoeri Brouwer,
  • Raul Luís,
  • Luís Pinto and
  • Bruno Gonçalves
  • + 4 authors

10 March 2020

Radiological monitoring is fundamental for compliance with radiological protection policies in the aftermath of radiological events, such as nuclear accidents, terrorism, and out-of-commission uranium mines. An effective strategy for radiation monito...

  • Article
  • Open Access
14 Citations
4,625 Views
15 Pages

Radiomics Driven Diffusion Weighted Imaging Sensing Strategies for Zone-Level Prostate Cancer Sensing

  • Chris Dulhanty,
  • Linda Wang,
  • Maria Cheng,
  • Hayden Gunraj,
  • Farzad Khalvati,
  • Masoom A. Haider and
  • Alexander Wong

10 March 2020

Prostate cancer is the most commonly diagnosed cancer in North American men; however, prognosis is relatively good given early diagnosis. This motivates the need for fast and reliable prostate cancer sensing. Diffusion weighted imaging (DWI) has gain...

  • Correction
  • Open Access
3,282 Views
2 Pages
  • Article
  • Open Access
79 Citations
7,746 Views
26 Pages

10 March 2020

Over the recent era, Wireless Sensor Network (WSN) has attracted much attention among industrialists and researchers owing to its contribution to numerous applications including military, environmental monitoring and so on. However, reducing the netw...

  • Article
  • Open Access
10 Citations
6,440 Views
22 Pages

Analysis of the Functionality of the Feed Chain in Olive Pitting, Slicing and Stuffing Machines by IoT, Computer Vision and Neural Network Diagnosis

  • Alberto Lucas Pascual,
  • Antonio Madueño Luna,
  • Manuel de Jódar Lázaro,
  • José Miguel Molina Martínez,
  • Antonio Ruiz Canales,
  • José Miguel Madueño Luna and
  • Meritxell Justicia Segovia

10 March 2020

Olive pitting, slicing and stuffing machines (DRR in Spanish) are characterized by the fact that their optimal functioning is based on appropriate adjustments. Traditional systems are not completely reliable because their minimum error rate is 1&ndas...

  • Article
  • Open Access
53 Citations
6,943 Views
28 Pages

9 March 2020

Local path planning is important in the development of autonomous vehicles since it allows a vehicle to adapt their movements to dynamic environments, for instance, when obstacles are detected. This work presents an evaluation of the performance of d...

  • Article
  • Open Access
59 Citations
6,571 Views
21 Pages

9 March 2020

Determination of indoor position based on fine time measurement (FTM) of the round trip time (RTT) of a signal between an initiator (smartphone) and a responder (Wi-Fi access point) enables a number of applications. However, the accuracy currently at...

  • Article
  • Open Access
18 Citations
4,367 Views
20 Pages

9 March 2020

Variability in individual pain sensitivity is a major problem in pain assessment. There have been studies reported using pain-event related potential (pain-ERP) for evaluating pain perception. However, none of them has achieved high accuracy in estim...

  • Article
  • Open Access
14 Citations
3,557 Views
10 Pages

Helicity Enhanced Torsion Sensor Based on Liquid Filled Twisted Photonic Crystal Fibers

  • Feng Zhang,
  • Ying Wang,
  • Zhiyong Bai,
  • Shen Liu,
  • Cailing Fu,
  • Yijian Huang,
  • Changrui Liao and
  • Yiping Wang

9 March 2020

A highly sensitive torsion sensor can be constructed by combining a twisted photonic crystal fiber with a liquid-filled waveguide in its air-hole cladding. The torsion sensitivity of this type of sensor is determined directly by the phase-matching co...

  • Article
  • Open Access
10 Citations
3,995 Views
19 Pages

9 March 2020

The observational covariance matrix, whose diagonal square root is currently named radiometric noise, is one of the most important elements to characterize a given instrument. It determines the precision of measurements and their possible spectral in...

  • Article
  • Open Access
112 Citations
17,534 Views
14 Pages

9 March 2020

Photoplethysmography (PPG) is an easy and convenient method by which to measure heart rate (HR). However, PPG signals that optically measure volumetric changes in blood are not robust to motion artifacts. In this paper, we develop a PPG measuring sys...

  • Article
  • Open Access
3 Citations
5,179 Views
19 Pages

9 March 2020

In this work, we propose an adaptive face tracking scheme that compensates for possible face tracking errors during its operation. The proposed scheme is equipped with a tracking divergence estimate, which allows to detect early and minimize the face...

  • Article
  • Open Access
13 Citations
7,923 Views
14 Pages

9 March 2020

Mobile devices such as sensors are used to connect to the Internet and provide services to users. Web services are vulnerable to automated attacks, which can restrict mobile devices from accessing websites. To prevent such automated attacks, CAPTCHAs...

  • Review
  • Open Access
65 Citations
11,508 Views
12 Pages

9 March 2020

With the development of intelligent modern power systems, real-time sensing and monitoring of system operating conditions have become one of the enabling technologies. Due to their flexibility, robustness and broad serviceable scope, wireless sensor...

  • Article
  • Open Access
6 Citations
3,717 Views
23 Pages

9 March 2020

The semi-enclosed estuary is very susceptible to changes in the physical and environmental characteristics of the inflow from the land. Therefore, continuous and comprehensive monitoring of such changes is necessary for managing the estuary. Neverthe...

  • Article
  • Open Access
11 Citations
6,103 Views
25 Pages

Enhancement of RGB-D Image Alignment Using Fiducial Markers

  • Tiago Madeira,
  • Miguel Oliveira and
  • Paulo Dias

9 March 2020

Three-dimensional (3D) reconstruction methods generate a 3D textured model from the combination of data from several captures. As such, the geometrical transformations between these captures are required. The process of computing or refining these tr...

  • Article
  • Open Access
5 Citations
3,183 Views
17 Pages

Estimating and Analyzing Long-Term Multi-GNSS Inter-System Bias Based on Uncombined PPP

  • Fan Zhang,
  • Changjian Liu,
  • Guorui Xiao,
  • Xi Zhang and
  • Xu Feng

9 March 2020

With the development of precise positioning with multi-GNSS, the inter-system bias (ISB) has become an issue that cannot be ignored. ISB is introduced from the differences among satellite reference clocks and different receiver hardware delay biases....

  • Article
  • Open Access
20 Citations
8,034 Views
19 Pages

9 March 2020

This article presents the novel Python, C# and JavaScript libraries of Node Primitives (NEP), a high-level, open, distributed, and component-based framework designed to enable easy development of cross-platform software architectures. NEP is built on...

  • Feature Paper
  • Review
  • Open Access
54 Citations
9,508 Views
21 Pages

9 March 2020

The use of wearable body sensors for health monitoring is a quickly growing field with the potential of offering a reliable means for clinical and remote health management. This includes both real-time monitoring and health trend monitoring with the...

  • Article
  • Open Access
10 Citations
4,466 Views
11 Pages

Phenosafranin-Based Colorimetric-Sensing Platform for Nitrite Detection Enabled by Griess Assay

  • Jingzhou Hou,
  • Huixiang Wu,
  • Xin Shen,
  • Chao Zhang,
  • Changjun Hou,
  • Qiang He and
  • Danqun Huo

9 March 2020

A facile and effective colorimetric-sensing platform based on the diazotization of phenosafranin for the detection of NO 2 under acidic conditions using the Griess assay is presented. Diazotization of commercial phenosafranin prod...

  • Article
  • Open Access
22 Citations
5,129 Views
16 Pages

9 March 2020

We implement elliptic curve cryptography on the MSP430 which is a commonly used microcontroller in wireless sensor network nodes. We use the number theoretic transform to perform finite field multiplication and squaring as required in elliptic curve...

  • Article
  • Open Access
9 Citations
3,564 Views
20 Pages

9 March 2020

Mixed pixels commonly exist in low-resolution remote sensing images, and they are the key factors hindering the classification of land covers and high-precision mapping. To obtain the spatial information at the subpixel level, subpixel mapping (SPM)...

  • Article
  • Open Access
21 Citations
5,278 Views
25 Pages

Geochemical and Geophysical Monitoring of Hydrocarbon Seepage in the Adriatic Sea

  • Marzia Rovere,
  • Alessandra Mercorella,
  • Emanuela Frapiccini,
  • Valerio Funari,
  • Federico Spagnoli,
  • Claudio Pellegrini,
  • Andree Soledad Bonetti,
  • Tiziana Veneruso,
  • Anna Nora Tassetti and
  • Ilaria Antoncecchi
  • + 6 authors

9 March 2020

Hydrocarbon seepage is overlooked in the marine environment, mostly due to the lack of high-resolution exploration data. This contribution is about the set-up of a relocatable and cost-effective monitoring system, which was tested on two seepages in...

  • Article
  • Open Access
21 Citations
4,572 Views
13 Pages

9 March 2020

Gold and silver have an extremely low refractive index value of about 0.04 in the visible to near infrared (NIR) regions, and this induces a relative error of about 50% in refractive index measurements. This can lead to a large uncertainty in the ima...

  • Article
  • Open Access
25 Citations
6,792 Views
14 Pages

Analytical Approach to Study Sensing Properties of Graphene Based Gas Sensor

  • Ali Hosseingholipourasl,
  • Sharifah Hafizah Syed Ariffin,
  • Yasser D. Al-Otaibi,
  • Elnaz Akbari,
  • Fatimah. KH. Hamid,
  • S. S. R. Koloor and
  • Michal Petrů

9 March 2020

Over the past years, carbon-based materials and especially graphene, have always been known as one of the most famous and popular materials for sensing applications. Graphene poses outstanding electrical and physical properties that make it favorable...

  • Article
  • Open Access
13 Citations
3,867 Views
21 Pages

9 March 2020

Unsupervised change detection approaches, which are relatively straightforward and easy to implement and interpret, and which require no human intervention, are widely used in change detection. Polarimetric synthetic aperture radar (PolSAR), which ha...

  • Article
  • Open Access
20 Citations
5,002 Views
15 Pages

A Lamping U-Shaped Fiber Biosensor Detector for MicroRNA

  • Hsin-Yi Wen,
  • Chun-Wei Huang,
  • Yu-Le Li,
  • Jing-Luen Chen,
  • Yao-Tsung Yeh and
  • Chia-Chin Chiang

9 March 2020

This study presents a U-shaped optical fiber developed for a facile application of microRNA detection. It is fabricated by the lamping process and packaged in a quartz tube to eliminate human negligence. In addition, silanization and electrostatic se...

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