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Source: Sensors

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Total 1395 results found since Jan 2013.

Sensors, Vol. 23, Pages 3618: Towards Home-Based Diabetic Foot Ulcer Monitoring: A Systematic Review
Ceponis It is considered that 1 in 10 adults worldwide have diabetes. Diabetic foot ulcers are some of the most common complications of diabetes, and they are associated with a high risk of lower-limb amputation and, as a result, reduced life expectancy. Timely detection and periodic ulcer monitoring can considerably decrease amputation rates. Recent research has demonstrated that computer vision can be used to identify foot ulcers and perform non-contact telemetry by using ulcer and tissue area segmentation. However, the applications are limited to controlled lighting conditions, and expert knowledge is required for d...
Source: Sensors - March 30, 2023 Category: Biotechnology Authors: Arturas Kairys Renata Pauliukiene Vidas Raudonis Jonas Ceponis Tags: Review Source Type: research

Sensors, Vol. 23, Pages 3550: Maximizing Heterogeneous Server Utilization with Limited Availability Times for Divisible Loads Scheduling on Networked Systems
i Zhang Most of the available divisible-load scheduling models assume that all servers in networked systems are idle before workloads arrive and that they can remain available online during workload computation. In fact, this assumption is not always valid. Different servers on networked systems may have heterogenous available times. If we ignore the availability constraints when dividing and distributing workloads among servers, some servers may not be able to start processing their assigned load fractions or deliver them on time. In view of this, we propose a new multi-installment scheduling model based on server ava...
Source: Sensors - March 28, 2023 Category: Biotechnology Authors: Xiaoli Wang Bharadwaj Veeravalli Xiaobo Song Kaiqi Zhang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 3549: An Asynchronous Collision-Tolerant ACRDA Scheme Based on Satellite-Selection Collaboration-Beamforming for LEO Satellite IoT Networks
xin Zhang In this paper, an asynchronous collision-tolerant ACRDA scheme based on satellite-selection collaboration-beamforming (SC-ACRDA) is proposed to solve the avalanche effect caused by packet collision under random access (RA) high load in the low earth orbit (LEO) satellite Internet of Things (IoT) networks. A non-convex optimization problem is formulated to realize the satellite selection problem in multi-satellite collaboration-beamforming. To solve this problem, we employ the Charnes-Cooper transformation to transform a convex optimization problem. In addition, an iterative binary search algorithm is also des...
Source: Sensors - March 28, 2023 Category: Biotechnology Authors: Tao Hong Rui Liu Ziwei Liu Xiaojin Ding Gengxin Zhang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 3532: Navigation with Polytopes: A Toolbox for Optimal Path Planning with Polytope Maps and B-spline Curves
ris Ernst To deal with the problem of optimal path planning in 2D space, this paper introduces a new toolbox named “Navigation with Polytopes” and explains the algorithms behind it. The toolbox allows one to create a polytopic map from a standard grid map, search for an optimal corridor, and plan a safe B-spline reference path used for mobile robot navigation. Specifically, the B-spline path is converted into its equivalent Bézier representation via a novel calculation method in order to reduce the conservativeness of the constrained path planning problem. The conversion can h...
Source: Sensors - March 28, 2023 Category: Biotechnology Authors: Ngoc Thinh Nguyen Pranav Tej Gangavarapu Niklas Fin Kompe Georg Schildbach Floris Ernst Tags: Article Source Type: research

Sensors, Vol. 23, Pages 3512: PRM-D* Method for Mobile Robot Path Planning
In this study, we use the idea of hierarchical planning to improve the dynamic obstacle avoidance performance of PRM by introducing D* into the network construction and planning process of PRM. To demonstrate the feasibility of the proposed method, we conducted simulation experiments using the proposed PRM-D*(probabilistic roadmap method and D*) method for maps of different complexity and compared the results with those obtained by classical methods such as SPARS2(improving sparse roadmap spanners). The experiments demonstrate that our method is non-optimal in terms of path length but second only to graph search methods; i...
Source: Sensors - March 27, 2023 Category: Biotechnology Authors: Chunyang Liu Saibao Xie Xin Sui Yan Huang Xiqiang Ma Nan Guo Fang Yang Tags: Article Source Type: research

Sensors, Vol. 23, Pages 3426: Instrumented Timed Up and Go Test (iTUG) & mdash;More Than Assessing Time to Predict Falls: A Systematic Review
Sensors, Vol. 23, Pages 3426: Instrumented Timed Up and Go Test (iTUG)—More Than Assessing Time to Predict Falls: A Systematic Review Sensors doi: 10.3390/s23073426 Authors: Paulina Ortega-Bastidas Britam Gómez Pablo Aqueveque Soledad Luarte-Martínez Roberto Cano-de-la-Cuerda The Timed Up and Go (TUG) test is a widely used tool for assessing the risk of falls in older adults. However, to increase the test’s predictive value, the instrumented Timed Up and Go (iTUG) test has been developed, incorporating different technological approaches. This systematic review aims to explore the e...
Source: Sensors - March 24, 2023 Category: Biotechnology Authors: Paulina Ortega-Bastidas Britam G ómez Pablo Aqueveque Soledad Luarte-Mart ínez Roberto Cano-de-la-Cuerda Tags: Systematic Review Source Type: research

Sensors, Vol. 23, Pages 3397: Accuracy of Intracranial Pressure Monitoring & mdash;Single Centre Observational Study and Literature Review
This study utilises illustrative clinical and laboratory material from 1200 TBI patients (collected from 1992 to 2019) to present several important points regarding the accuracy of in vivo implementation of contemporary ICP transducers. In addition, a thorough literature search was performed, with sources dating from 1960 to 2021. Sources considered to be relevant matched the keywords: “intraparenchymal ICP sensors”, “fiberoptic ICP sensors”, “piezoelectric strain gauge sensors”, “external ventricular drains”, &a...
Source: Sensors - March 23, 2023 Category: Biotechnology Authors: Adam I. Pelah Agnieszka Zakrzewska Leanne A. Calviello Teodoro Forcht Dagi Zofia Czosnyka Marek Czosnyka Tags: Review Source Type: research

Sensors, Vol. 23, Pages 3396: Mobile App Interventions for Parkinson & rsquo;s Disease, Multiple Sclerosis and Stroke: A Systematic Literature Review
Sensors, Vol. 23, Pages 3396: Mobile App Interventions for Parkinson’s Disease, Multiple Sclerosis and Stroke: A Systematic Literature Review Sensors doi: 10.3390/s23073396 Authors: Andreas Triantafyllidis Sofia Segkouli Stelios Zygouris Christina Michailidou Konstantinos Avgerinakis Evangelia Fappa Sophia Vassiliades Anastasia Bougea Nikos Papagiannakis Ioannis Katakis Evangelos Mathioudis Alexandru Sorici Lidia Bajenaru Valentina Tageo Francesco Camonita Christoniki Magga-Nteve Stefanos Vrochidis Ludovico Pedullà Giampaolo Brichetto Panagiotis Tsakanikas Konstantinos...
Source: Sensors - March 23, 2023 Category: Biotechnology Authors: Andreas Triantafyllidis Sofia Segkouli Stelios Zygouris Christina Michailidou Konstantinos Avgerinakis Evangelia Fappa Sophia Vassiliades Anastasia Bougea Nikos Papagiannakis Ioannis Katakis Evangelos Mathioudis Alexandru Sorici Lidia Bajenaru Valentina T Tags: Review Source Type: research

Sensors, Vol. 23, Pages 3384: Unsupervised Video Summarization Based on Deep Reinforcement Learning with Interpolation
We present a lightweight video summarization network with transformer and CNN networks to capture the global and local contexts to efficiently predict the keyframe-level importance score of the video in a short length. The output importance score of the network was interpolated to fit the video length. Using the predicted importance score, we calculated the reward based on the reward functions, which helped select interesting keyframes efficiently and uniformly. We evaluated the proposed method on two datasets, SumMe and TVSum. The experimental results illustrate that the proposed method showed a state-of-the-art performan...
Source: Sensors - March 23, 2023 Category: Biotechnology Authors: Ui Nyoung Yoon Myung Duk Hong Geun-Sik Jo Tags: Article Source Type: research

Sensors, Vol. 23, Pages 3337: Optimized Weight Low-Frequency Search Coil Magnetometer for Ground & ndash;Airborne Frequency Domain Electromagnetic Method
Sensors, Vol. 23, Pages 3337: Optimized Weight Low-Frequency Search Coil Magnetometer for Ground–Airborne Frequency Domain Electromagnetic Method Sensors doi: 10.3390/s23063337 Authors: Fei Teng Ye Tong Bofeng Zou The vertical component magnetic field signal in the ground–airborne frequency domain electromagnetic (GAFDEM) method is detected by the air coil sensor, which is parallel to the ground. Unfortunately, the air coil sensor has low sensitivity in the low-frequency band, making it challenging to detect effective low-frequency signals and causing low accuracy and large error for int...
Source: Sensors - March 22, 2023 Category: Biotechnology Authors: Fei Teng Ye Tong Bofeng Zou Tags: Communication Source Type: research

Sensors, Vol. 23, Pages 3353: A Scheduling Method of Using Multiple SAR Satellites to Observe a Large Area
xue Jia This paper presents a scheduling problem of using multiple synthetic aperture radar (SAR) satellites to observe a large irregular area (SMA). SMA is usually considered as a kind of nonlinear combinatorial optimized problem and its solution space strongly coupled with geometry grows exponentially with the increasing magnitude of SMA. It is assumed that each solution of SMA yields a profit associated with the acquired portion of the target area, and the objective of this paper is to find the optimal solution yielding the maximal profit. The SMA is solved by means of a new method composed of three successive phase...
Source: Sensors - March 22, 2023 Category: Biotechnology Authors: Qicun Zheng Haixia Yue Dacheng Liu Xiaoxue Jia Tags: Article Source Type: research

Sensors, Vol. 23, Pages 3350: Wearable and Portable Devices for Acquisition of Cardiac Signals while Practicing Sport: A Scoping Review
Sbrollini Wearable and portable devices capable of acquiring cardiac signals are at the frontier of the sport industry. They are becoming increasingly popular for monitoring physiological parameters while practicing sport, given the advances in miniaturized technologies, powerful data, and signal processing applications. Data and signals acquired by these devices are increasingly used to monitor athletes’ performances and thus to define risk indices for sport-related cardiac diseases, such as sudden cardiac death. This scoping review investigated commercial wearable and portable devices employed for cardi...
Source: Sensors - March 22, 2023 Category: Biotechnology Authors: Sofia Romagnoli Francesca Ripanti Micaela Morettini Laura Burattini Agnese Sbrollini Tags: Review Source Type: research

Sensors, Vol. 23, Pages 3317: High-Precision 3D-DIC Measurement Method Based on Improved Forward Newton Iteration
Yu Wang To solve the problems of the traditional 3D-DIC algorithm based on feature information or FFT search at the expense of accuracy in exchange for time, such as error-point extraction, mismatching of feature points, poor robustness, and accuracy loss caused by poor anti-noise performance, an improved high-precision 3D-DIC measurement method was proposed. In this method, the exact initial value is obtained by an exhaustive search. Then, the forward Newton iteration method is used for pixel classification, and the first-order nine-point interpolation is designed, which can quickly obtain the elements of Jacobian and...
Source: Sensors - March 21, 2023 Category: Biotechnology Authors: Huihui Wen Ze Liu Weizhe Gao Yu Wang Tags: Communication Source Type: research

Sensors, Vol. 23, Pages 3263: A Critical Review on Factors Affecting the User Adoption of Wearable and Soft Robotics
n Lim In recent years, the advent of soft robotics has changed the landscape of wearable technologies. Soft robots are highly compliant and malleable, thus ensuring safe human-machine interactions. To date, a wide variety of actuation mechanisms have been studied and adopted into a multitude of soft wearables for use in clinical practice, such as assistive devices and rehabilitation modalities. Much research effort has been put into improving their technical performance and establishing the ideal indications for which rigid exoskeletons would play a limited role. However, despite having achieved many feats over the pas...
Source: Sensors - March 20, 2023 Category: Biotechnology Authors: Benjamin Wee Keong Ang Chen-Hua Yeow Jeong Hoon Lim Tags: Review Source Type: research

Sensors, Vol. 23, Pages 3293: A Systematic Review of Optimization Algorithms for Structural Health Monitoring and Optimal Sensor Placement
This article also demonstrates that these sophisticated methods, using artificial intelligence (AI), are highly accurate and fast at solving complex problems.
Source: Sensors - March 20, 2023 Category: Biotechnology Authors: Sahar Hassani Ulrike Dackermann Tags: Review Source Type: research