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Total 2011 results found since Jan 2013.

Sensors, Vol. 23, Pages 5418: Adaptive Fuzzy Logic Deep-Learning Equalizer for Mitigating Linear and Nonlinear Distortions in Underwater Visible Light Communication Systems
angovan Underwater visible light communication (UVLC) has recently come to light as a viable wireless carrier for signal transmission in risky, uncharted, and delicate aquatic environments like seas. Despite the potential of UVLC as a green, clean, and safe alternative to conventional communication methods, it is challenged by significant signal attenuation and turbulent channel conditions compared to long-distance terrestrial communication. To address linear and nonlinear impairments in UVLC systems, this paper presents an adaptive fuzzy logic deep-learning equalizer (AFL-DLE) for 64 Quadrature Amplitude Modulation-Co...
Source: Sensors - June 7, 2023 Category: Biotechnology Authors: Radhakrishnan Rajalakshmi Sivakumar Pothiraj Miroslav Mahdal Muniyandy Elangovan Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5404: Prediction of Joint Angles Based on Human Lower Limb Surface Electromyography
i Qinghao Chu Wearable exoskeletons can help people with mobility impairments by improving their rehabilitation. As electromyography (EMG) signals occur before movement, they can be used as input signals for the exoskeletons to predict the body’s movement intention. In this paper, the OpenSim software is used to determine the muscle sites to be measured, i.e., rectus femoris, vastus lateralis, semitendinosus, biceps femoris, lateral gastrocnemius, and tibial anterior. The surface electromyography (sEMG) signals and inertial data are collected from the lower limbs while the human body is walking, going u...
Source: Sensors - June 7, 2023 Category: Biotechnology Authors: Hongyu Zhao Zhibo Qiu Daoyong Peng Fang Wang Zhelong Wang Sen Qiu Xin Shi Qinghao Chu Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5368: Precision Denavit & ndash;Hartenberg Parameter Calibration for Industrial Robots Using a Laser Tracker System and Intelligent Optimization Approaches
Sensors, Vol. 23, Pages 5368: Precision Denavit–Hartenberg Parameter Calibration for Industrial Robots Using a Laser Tracker System and Intelligent Optimization Approaches Sensors doi: 10.3390/s23125368 Authors: Mojtaba A. Khanesar Minrui Yan Mohammed Isa Samanta Piano David T. Branson Precision object handling and manipulation require the accurate positioning of industrial robots. A common practice for performing end effector positioning is to read joint angles and use industrial robot forward kinematics (FKs). However, industrial robot FKs rely on the robot Denavit–Hartenberg (DH) ...
Source: Sensors - June 6, 2023 Category: Biotechnology Authors: Mojtaba A. Khanesar Minrui Yan Mohammed Isa Samanta Piano David T. Branson Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5349: Load Balancing Using Artificial Intelligence for Cloud-Enabled Internet of Everything in Healthcare Domain
a A. Alkhaldi The emergence of the Internet of Things (IoT) and its subsequent evolution into the Internet of Everything (IoE) is a result of the rapid growth of information and communication technologies (ICT). However, implementing these technologies comes with certain obstacles, such as the limited availability of energy resources and processing power. Consequently, there is a need for energy-efficient and intelligent load-balancing models, particularly in healthcare, where real-time applications generate large volumes of data. This paper proposes a novel, energy-aware artificial intelligence (AI)-based load balanci...
Source: Sensors - June 5, 2023 Category: Biotechnology Authors: Ibrahim Aqeel Ibrahim Mohsen Khormi Surbhi Bhatia Khan Mohammed Shuaib Ahlam Almusharraf Shadab Alam Nora A. Alkhaldi Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5336: Preparation of Nanocomposites for Antibacterial Orthodontic Invisible Appliance Based on Piezoelectric Catalysis
n Qingzong Si Compared to fixed orthodontic appliances with brackets, thermoplastic invisible orthodontic aligners offer several advantages, such as high aesthetic performance, good comfort, and convenient oral health maintenance, and are widely used in orthodontic fields. However, prolonged use of thermoplastic invisible aligners may lead to demineralization and even caries in most patients’ teeth, as they enclose the tooth surface for an extended period. To address this issue, we have created PETG composites that contain piezoelectric barium titanate nanoparticles (BaTiO3NPs) to obtain antibacterial p...
Source: Sensors - June 5, 2023 Category: Biotechnology Authors: Yingying Shi Ningning Zhang Jiajie Liu Junbin Wang Shuhui Shen Jingxiang Zhang Xiaoli An Qingzong Si Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5335: Detecting the Unseen: Understanding the Mechanisms and Working Principles of Earthquake Sensors
In this study, we analyzed available sensor platforms that have been widely used in recent years, with satellites and UAVs being among the most used. The findings of our study will be useful for future earthquake response and relief efforts, as well as research aimed at reducing earthquake disaster risks.
Source: Sensors - June 5, 2023 Category: Biotechnology Authors: Bingwei Tian Wenrui Liu Haozhou Mo Wang Li Yuting Wang Basanta Raj Adhikari Tags: Review Source Type: research

Sensors, Vol. 23, Pages 5280: Titanium Nitride Modified Fiber Optic Interferometer for Refractive Index Sensitivity Enhancement
This study proposes a TiN-modified fiber optic interferometer. Benefiting from the unique properties of TiN, including ultrathin nanolayer, high refractive index, and broad-spectrum optical absorption, the refractive index (RI) response of the interferometer is greatly enhanced, which is desired all the time in the field of biosensing. The experimental results show that the deposited TiN nanoparticles (NPs) can enhance the evanescent field excitation and modulate the effective RI difference of the interferometer, which eventually results in the RI response enhancement. Besides, after incorporating the TiN with different co...
Source: Sensors - June 2, 2023 Category: Biotechnology Authors: Duo Yi Bin Zhang Youfu Geng Xuejin Li Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5292: An Improved Ambiguity Resolution Algorithm for Smartphone RTK Positioning
In conclusion, centimeter-level smartphone positioning accuracy is achieved in both experiments, which is greatly improved compared with the float and traditional AR solutions.
Source: Sensors - June 2, 2023 Category: Biotechnology Authors: Yang Jiang Yuting Gao Wei Ding Fei Liu Yang Gao Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5262: Obstacle Detection System for Navigation Assistance of Visually Impaired People Based on Deep Learning Techniques
Alsariera Visually impaired people seek social integration, yet their mobility is restricted. They need a personal navigation system that can provide privacy and increase their confidence for better life quality. In this paper, based on deep learning and neural architecture search (NAS), we propose an intelligent navigation assistance system for visually impaired people. The deep learning model has achieved significant success through well-designed architecture. Subsequently, NAS has proved to be a promising technique for automatically searching for the optimal architecture and reducing human efforts for architecture d...
Source: Sensors - June 1, 2023 Category: Biotechnology Authors: Yahia Said Mohamed Atri Marwan Ali Albahar Ahmed Ben Atitallah Yazan Ahmad Alsariera Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5237: A Systematic Survey of Data Augmentation of ECG Signals for AI Applications
This study adhered to the rigorous PRISMA guidelines for systematic reviews. To ensure comprehensive coverage, publications between 2013 and 2023 were searched across multiple databases, including IEEE Explore, PubMed, and Web of Science. The records were meticulously reviewed to determine their relevance to the study’s objective, and those that met the inclusion criteria were selected for further analysis. Consequently, 119 papers were deemed relevant for further review. Overall, this study shed light on the potential of DA to advance the field of ECG diagnosis and monitoring.
Source: Sensors - May 31, 2023 Category: Biotechnology Authors: Md Moklesur Rahman Massimo Walter Rivolta Fabio Badilini Roberto Sassi Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5229: Open-Source Implementations of the Reactive Asset Administration Shell: A Survey
iedrich Volz The use of open-source software is crucial for the digitalization of manufacturing, including the implementation of Digital Twins as envisioned in Industry 4.0. This research paper provides a comprehensive comparison of free and open-source implementations of the reactive Asset Administration Shell (AAS) for creating Digital Twins. A structured search on GitHub and Google Scholar was conducted, leading to the selection of four implementations for detailed analysis. Objective evaluation criteria were defined, and a testing framework was created to test support for the most common AAS model elements and API ...
Source: Sensors - May 31, 2023 Category: Biotechnology Authors: Michael Jacoby Michael Baumann Tino Bischoff Hans Mees Jens M üller Ljiljana Stojanovic Friedrich Volz Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5172: A Path Planning Method with a Bidirectional Potential Field Probabilistic Step Size RRT for a Dual Manipulator
ijie Wang The search efficiency of a rapidly exploring random tree (RRT) can be improved by introducing a high-probability goal bias strategy. In the case of multiple complex obstacles, the high-probability goal bias strategy with a fixed step size will fall into a local optimum, which reduces search efficiency. Herein, a bidirectional potential field probabilistic step size rapidly exploring random tree (BPFPS-RRT) was proposed for the path planning of a dual manipulator by introducing a search strategy of a step size with a target angle and random value. The artificial potential field method was introduced, combining...
Source: Sensors - May 29, 2023 Category: Biotechnology Authors: Youyu Liu Wanbao Tao Shunfang Li Yi Li Qijie Wang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 5164: Spectroscopic Microtomography in the Short-Wave Infrared Wavelength Range
in Sung Spectroscopic microtomography provides the ability to perform 4D (3D structural and 1D chemical) imaging of a thick microscopic specimen. Here, we demonstrate spectroscopic microtomography in the short-wave infrared (SWIR) wavelength using digital holographic tomography, which captures both the absorption coefficient and refractive index. A broadband laser in tandem with a tunable optical filter allows us to scan the wavelength from 1100 to 1650 nm. Using the developed system, we measure human hair and sea urchin embryo samples. The resolution estimated with gold nanoparticles is 1.51 μm (transverse)...
Source: Sensors - May 29, 2023 Category: Biotechnology Authors: Cory Juntunen Andrew R. Abramczyk Peter Shea Yongjin Sung Tags: Communication Source Type: research

Sensors, Vol. 23, Pages 5038: Contactless Technologies, Sensors, and Systems for Cardiac and Respiratory Measurement during Sleep: A Systematic Review
epold Sleep is essential to physical and mental health. However, the traditional approach to sleep analysis—polysomnography (PSG)—is intrusive and expensive. Therefore, there is great interest in the development of non-contact, non-invasive, and non-intrusive sleep monitoring systems and technologies that can reliably and accurately measure cardiorespiratory parameters with minimal impact on the patient. This has led to the development of other relevant approaches, which are characterised, for example, by the fact that they allow greater freedom of movement and do not require direct contact ...
Source: Sensors - May 24, 2023 Category: Biotechnology Authors: Andrei Boiko Madrid Seepold Tags: Systematic Review Source Type: research

Sensors, Vol. 23, Pages 5018: Solid-Phase Optical Sensing Techniques for Sensitive Virus Detection
Selim Ünlü Viral infections can pose a major threat to public health by causing serious illness, leading to pandemics, and burdening healthcare systems. The global spread of such infections causes disruptions to every aspect of life including business, education, and social life. Fast and accurate diagnosis of viral infections has significant implications for saving lives, preventing the spread of the diseases, and minimizing social and economic damages. Polymerase chain reaction (PCR)-based techniques are commonly used to detect viruses in the clinic. However, PCR has several drawbacks, as highlighted during the rec...
Source: Sensors - May 24, 2023 Category: Biotechnology Authors: Elif Seymour Fulya Ekiz Kanik Sinem Diken G ür Monireh Bakhshpour-Yucel Ali Araz Nese Lortlar Ünlü M. Selim Ünlü Tags: Review Source Type: research