keyword
https://read.qxmd.com/read/38534557/adaptive-network-model-for-assisting-people-with-disabilities-through-crowd-monitoring-and-control
#1
JOURNAL ARTICLE
Alicia Falcon-Caro, Evtim Peytchev, Saeid Sanei
Here, we present an effective application of adaptive cooperative networks, namely assisting disables in navigating in a crowd in a pandemic or emergency situation. To achieve this, we model crowd movement and introduce a cooperative learning approach to enable cooperation and self-organization of the crowd members with impaired health or on wheelchairs to ensure their safe movement in the crowd. Here, it is assumed that the movement path and the varying locations of the other crowd members can be estimated by each agent...
March 16, 2024: Bioengineering
https://read.qxmd.com/read/38533055/advances-in-machine-learning-and-iot-for-water-quality-monitoring-a-comprehensive-review
#2
REVIEW
Ismail Essamlali, Hasna Nhaila, Mohamed El Khaili
Water holds great significance as a vital resource in our everyday lives, highlighting the important to continuously monitor its quality to ensure its usability. The advent of the. The Internet of Things (IoT) has brought about a revolutionary shift by enabling real-time data collection from diverse sources, thereby facilitating efficient monitoring of water quality (WQ). By employing Machine learning (ML) techniques, this gathered data can be analyzed to make accurate predictions regarding water quality. These predictive insights play a crucial role in decision-making processes aimed at safeguarding water quality, such as identifying areas in need of immediate attention and implementing preventive measures to avert contamination...
March 30, 2024: Heliyon
https://read.qxmd.com/read/38512833/the-development-feasibility-and-credibility-of-intra-abdominal-pressure-measurement-techniques-a-scoping-review
#3
JOURNAL ARTICLE
ZhiRu Li, HuaFen Wang, FangYan Lu
AIM: To provide a comprehensive overview on emerging direct and alternative methods for intra-abdominal pressure (IAP) measurement techniques. METHODS: This was a scoping review study following Arksey and Malley's framework. The PubMed, EMBASE, Web of Science, EBSCO, Scopus and ProQuest databases were searched, and we only considered studies published from 2000 as we have extended the data from two previous reviews. Original studies that reported on the development, feasibility and credibility of IAP measurement techniques were included...
2024: PloS One
https://read.qxmd.com/read/38511573/a-flexible-adaptive-and-self-powered-triboelectric-vibration-sensor-with-conductive-sponge-silicone-for-machinery-condition-monitoring
#4
JOURNAL ARTICLE
Yongjiu Zou, Minzheng Sun, Xinyu Zhang, Junpeng Wang, Fangming Li, Fangyang Dong, Zhenhang Zhao, Taili Du, Yulong Ji, Peiting Sun, Minyi Xu
Vibration sensors for continuous and reliable condition monitoring of mechanical equipment, especially detection points of curved surfaces, remain a great challenge and are highly desired. Herein, a highly flexible and adaptive triboelectric vibration sensor for high-fidelity and continuous monitoring of mechanical vibration conditions is proposed. The sensor is entirely composed of flexible materials. It consists of a conductive sponge-silicone layer and a fluorinated ethylene propylene film. It can detect vibration acceleration of 5 to 50 m s-2 and vibration frequency of 10 to 100 Hz...
March 21, 2024: Small
https://read.qxmd.com/read/38507494/millimeter-scale-magnetic-implants-paired-with-a-fully-integrated-wearable-device-for-wireless-biophysical-and-biochemical-sensing
#5
JOURNAL ARTICLE
Ji Wan, Zhongyi Nie, Jie Xu, Zixuan Zhang, Shenglian Yao, Zehua Xiang, Xiang Lin, Yuxing Lu, Chen Xu, Pengcheng Zhao, Yiran Wang, Jingyan Zhang, Yaozheng Wang, Shaotong Zhang, Jinzhuo Wang, Weitao Man, Min Zhang, Mengdi Han
Implantable sensors can directly interface with various organs for precise evaluation of health status. However, extracting signals from such sensors mainly requires transcutaneous wires, integrated circuit chips, or cumbersome readout equipment, which increases the risks of infection, reduces biocompatibility, or limits portability. Here, we develop a set of millimeter-scale, chip-less, and battery-less magnetic implants paired with a fully integrated wearable device for measuring biophysical and biochemical signals...
March 22, 2024: Science Advances
https://read.qxmd.com/read/38500510/wireless-and-catheter-free-bladder-pressure-and-volume-sensor
#6
JOURNAL ARTICLE
Steve J A Majerus, Brett Hanzlicek, Yaneev Hacohen, Dario Cabal, Dennis Bourbeau, Margot S Damaser
Continuous monitoring of bladder activity during normal daily activities would improve clinical diagnostics and understanding of the mechanisms underlying bladder function, or help validate how differing neuromodulation strategies affect the bladder. This work describes a urological monitor of conscious activity (UroMOCA). The UroMOCA included a pressure sensor, urine impedance-sensing electrodes, and wireless battery recharge and data transmission circuitry. Components were assembled on a circuit board and encapsulated with an epoxy/silicone molded package that allowed Pt-Ir electrode feedthrough for urine contact...
March 15, 2024: IEEE Sensors Journal
https://read.qxmd.com/read/38499997/mechanical-robustness-enhanced-flexible-antennas-using-ti-3-c-2-mxene-and-nanocellulose-composites-for-noninvasive-glucose-sensing
#7
JOURNAL ARTICLE
Lin Fan, Yue Jiang, Ruihua Deng, Hua Zhu, Xiangyu Dai, Hao Liang, Ning Li, Zhengfang Qian
Electromagnetic sensors with flexible antennas as sensing elements have attracted increasing attention in noninvasive continuous glucose monitoring for diabetic patients. The significant radiation performance loss of flexible antennas during mechanical deformation impairs the reliability of glucose monitoring. Here, we present flexible ultrawideband monopole antennas composed of Ti3 C2 MXene and cellulose nanofibril (CNF) composite films for continuous glucose monitoring. The flexible MXene/CNF antenna with 20% CNF content can obtain a gain of up to 3...
March 18, 2024: ACS Sensors
https://read.qxmd.com/read/38477701/power-scavenging-microsystem-for-smart-contact-lenses
#8
JOURNAL ARTICLE
Erfan Pourshaban, Mohit U Karkhanis, Adwait Deshpande, Aishwaryadev Banerjee, Md Rabiul Hasan, Amirali Nikeghbal, Chayanjit Ghosh, Hanseup Kim, Carlos H Mastrangelo
On-the-eye microsystems such as smart contacts for vision correction, health monitoring, drug delivery, and displaying information represent a new emerging class of low-profile (≤ 1 mm) wireless microsystems that conform to the curvature of the eyeball surface. The implementation of suitable low-profile power sources for eye-based microsystems on curved substrates is a major technical challenge addressed in this paper. The fabrication and characterization of a hybrid energy generation unit composed of a flexible silicon solar cell and eye-blinking activated Mg-O2 metal-air harvester capable of sustainably supplying electrical power to smart ocular devices are reported...
March 13, 2024: Small
https://read.qxmd.com/read/38475113/lessons-learnt-from-monitoring-the-etna-volcano-using-an-iot-sensor-network-through-a-period-of-intense-eruptive-activity
#9
JOURNAL ARTICLE
Laurent Royer, Luca Terray, Maxime Rubéo-Lisa, Julien Sudre, Pierre-Jean Gauthier, Alexandre Claude, Salvatore Giammanco, Emilio Pecora, Paolo Principato, Vincent Breton
This paper describes the successes and failures after 4 years of continuous operation of a network of sensors, communicating nodes, and gateways deployed on the Etna Volcano in Sicily since 2019, including a period of Etna intense volcanic activity that occurred in 2021 and resulted in over 60 paroxysms. It documents how the installation of gateways at medium altitude allowed for data collection from sensors up to the summit craters. Most of the sensors left on the volcanic edifice during winters and during this period of intense volcanic activity were destroyed, but the whole gateway infrastructure remained fully operational, allowing for a very fruitful new field campaign two years later, in August 2023...
February 29, 2024: Sensors
https://read.qxmd.com/read/38474972/mouthguard-type-wearable-sensor-for-monitoring-salivary-turbidity-to-assess-oral-hygiene
#10
JOURNAL ARTICLE
Kenta Ichikawa, Kenta Iitani, Gentaro Kawase, Koji Toma, Takahiro Arakawa, Dzung Viet Dao, Kohji Mitsubayashi
Salivary turbidity is a promising indicator for evaluating oral hygiene. This study proposed a wearable mouthguard-type sensor for continuous and unconstrained measurement of salivary turbidity. The sensor evaluated turbidity by measuring the light transmittance of saliva with an LED and a phototransistor sealed inside a double-layered mouthguard. The sensor was also embedded with a Bluetooth wireless module, enabling the wireless measurement of turbidity. The mouthguard materials (polyethylene terephthalate-glycol and ethylene-vinyl acetate) and the wavelength of the LED (405 nm) were experimentally determined to achieve high sensitivity in salivary turbidity measurement...
February 23, 2024: Sensors
https://read.qxmd.com/read/38466691/design-and-development-of-patient-health-tracking-monitoring-and-big-data-storage-using-internet-of-things-and-real-time-cloud-computing
#11
JOURNAL ARTICLE
Imran Shafi, Sadia Din, Siddique Farooq, Isabel de la Torre Díez, Jose Breñosa, Julio César Martínez Espinosa, Imran Ashraf
With the outbreak of the COVID-19 pandemic, social isolation and quarantine have become commonplace across the world. IoT health monitoring solutions eliminate the need for regular doctor visits and interactions among patients and medical personnel. Many patients in wards or intensive care units require continuous monitoring of their health. Continuous patient monitoring is a hectic practice in hospitals with limited staff; in a pandemic situation like COVID-19, it becomes much more difficult practice when hospitals are working at full capacity and there is still a risk of medical workers being infected...
2024: PloS One
https://read.qxmd.com/read/38425057/wireless-continuous-single-lead-st-segment-monitoring-to-detect-new-onset-myocardial-injury-at-the-general-ward-an-exploratory-subanalysis
#12
JOURNAL ARTICLE
Jonathan Attilla Koefoed Starling, Camilla Haahr-Raunkjaer, Søren S Rasmussen, Luna Ekenberg, Frederik Cornelius Loft, Christian Sylvest Meyhoff, Eske Kvanner Aasvang
Patients admitted for acute medical conditions and major noncardiac surgery are at risk of myocardial injury. This is frequently asymptomatic, especially in the context of concomitant pain and analgesics, and detection thus relies on cardiac biomarkers. Continuous single-lead ST-segment monitoring from wireless electrocardiogram (ECG) may enable more timely intervention, but criteria for alerts need to be defined to reduce false alerts. This study aimed to determine optimal ST-deviation thresholds from wireless single-lead ECG for detection of myocardial injury following major abdominal cancer surgery and during acute exacerbation of chronic obstructive pulmonary disease...
February 29, 2024: Acta Anaesthesiologica Scandinavica
https://read.qxmd.com/read/38421078/polymeric-conductive-adhesive-based-ultrathin-epidermal-electrodes-for-long-term-monitoring-of-electrophysiological-signals
#13
JOURNAL ARTICLE
Joo Hwan Shin, Ji Yeong Choi, Keonuk June, Hyesu Choi, Tae-Il Kim
Electrophysiology, exploring vital electrical phenomena in living organisms, anticipates broader integration into daily life through wearable devices. However, addressing the challenges of electrode durability and motion artifacts is essential to enable continuous and long-term biopotential signal monitoring, presenting a hurdle for its seamless implementation in daily life. To address these challenges, we present an ultrathin poly(3,4- ethylenedioxythiophene): poly(styrenesulfonate)/polyvinyl alcohol/d-sorbitol (PPd) electrode with enhanced adhesion, stretchability, and skin conformability...
February 29, 2024: Advanced Materials
https://read.qxmd.com/read/38411256/water-monitoring-with-an-automated-smart-sensor-supported-with-solar-power-for-real-time-and-long-range-detection-of-ferrous-iron
#14
JOURNAL ARTICLE
Tugba Ozer, Ismail Agir, Thomas Borch
Low-power and smart sensing systems for iron detection are necessary for in situ monitoring of water quality. Here, a potentiometric Fe2+ -selective electrode (ISE) was fabricated based on cyanomethyl N -methyl- N -phenyl dithiocarbamate for the first time as an ionophore. Under optimal conditions, the ISE showed a Nernstian slope of 29.76 ± 0.6 mV per decade for Fe2+ ions over a wide concentration range from 1.0 × 10-1 to 1.0 × 10-5 M with a lower detection limit (LOD) of 1.0 × 10-6 M. The ISE interference of various cations on the potentiometric response was also investigated...
February 27, 2024: Analyst
https://read.qxmd.com/read/38400296/excessive-oxygen-administration-in-high-risk-patients-admitted-to-medical-and-surgical-wards-monitored-by-wireless-pulse-oximeter
#15
JOURNAL ARTICLE
Clara E Mathar, Camilla Haahr-Raunkjær, Mikkel Elvekjær, Ying Gu, Claire P Holm, Michael P Achiam, Lars N Jorgensen, Eske K Aasvang, Christian S Meyhoff
The monitoring of oxygen therapy when patients are admitted to medical and surgical wards could be important because exposure to excessive oxygen administration (EOA) may have fatal consequences. We aimed to investigate the association between EOA, monitored by wireless pulse oximeter, and nonfatal serious adverse events (SAEs) and mortality within 30 days. We included patients in the Capital Region of Copenhagen between 2017 and 2018. Patients were hospitalized due to acute exacerbation of chronic obstructive pulmonary disease (AECOPD) or after major elective abdominal cancer surgery, and all were treated with oxygen supply...
February 9, 2024: Sensors
https://read.qxmd.com/read/38391632/stretchable-flexible-breathable-self-adhesive-epidermal-hand-semg-sensor-system
#16
JOURNAL ARTICLE
Kerong Yang, Senhao Zhang, Xuhui Hu, Jiuqiang Li, Yingying Zhang, Yao Tong, Hongbo Yang, Kai Guo
Hand function rehabilitation training typically requires monitoring the activation status of muscles directly related to hand function. However, due to factors such as the small surface area for hand-back electrode placement and significant skin deformation, the continuous real-time monitoring of high-quality surface electromyographic (sEMG) signals on the hand-back skin still poses significant challenges. We report a stretchable, flexible, breathable, and self-adhesive epidermal sEMG sensor system. The optimized serpentine structure exhibits a sufficient stretchability and filling ratio, enabling the high-quality monitoring of signals...
February 1, 2024: Bioengineering
https://read.qxmd.com/read/38387027/a-wearable-electrochemical-biosensor-utilizing-functionalized-ti-3-c-2-t-x-mxene-for-the-real-time-monitoring-of-uric-acid-metabolite
#17
JOURNAL ARTICLE
Fan Chen, Jinhao Wang, Lijuan Chen, Haoliang Lin, Dongxue Han, Yu Bao, Wei Wang, Li Niu
Wearable, noninvasive sensors enable the continuous monitoring of metabolites in sweat and provide clinical information related to an individual ' s health and disease states. Uric acid (UA) is a key indicator highly associated with gout, hyperuricaemia, hypertension, kidney disease, and Lesch-Nyhan syndrome. However, the detection of UA levels typically relies on invasive blood tests. Therefore, developing a wearable device for noninvasive monitoring of UA concentrations in sweat could facilitate real-time personalized disease prevention...
February 22, 2024: Analytical Chemistry
https://read.qxmd.com/read/38377279/an-ultrasensitive-ti-3-c-2-t-x-mxene-based-soft-contact-lens-for-continuous-and-nondestructive-intraocular-pressure-monitoring
#18
JOURNAL ARTICLE
Zhongyi Duan, Miao Yuan, Zhiduo Liu, Weihua Pei, Kai Jiang, La Li, Guozhen Shen
Wearable soft contact lens sensors for continuous and nondestructive intraocular pressure (IOP) monitoring are highly desired as glaucoma and postoperative myopia patients grow, especially as the eyestrain crowd increases. Herein, a smart closed-loop system is presented that combines a Ti3 C2 Tx MXene-based soft contact lens (MX-CLS) sensor, wireless data transmission units, display, and warning components to realize continuous and nondestructive IOP monitoring/real-time display. The fabricated MX-CLS device exhibits an extremely high sensitivity of 7...
February 20, 2024: Small
https://read.qxmd.com/read/38376103/advancements-in-bio-inspired-self-powered-wireless-sensors-materials-mechanisms-and-biomedical-applications
#19
REVIEW
Mohammad Ali Farzin, Seyed Morteza Naghib, Navid Rabiee
The rapid maturation of smart city ecosystems is intimately linked to advances in the Internet of Things (IoT) and self-powered sensing technologies. Central to this evolution are battery-less sensors that are critical for applications such as continuous health monitoring through blood metabolites and vital signs, the recognition of human activity for behavioral analysis, and the operational enhancement of humanoid robots. The focus on biosensors that exploit the human body for energy-spanning wearable, attachable, and implantable variants has intensified, driven by their broad applicability in areas from underwater exploration to biomedical assays and earthquake monitoring...
February 20, 2024: ACS Biomaterials Science & Engineering
https://read.qxmd.com/read/38375147/low-cost-mems-accelerometers-for-earthquake-early-warning-systems-a-dataset-collected-during-seismic-events-in-central-italy
#20
JOURNAL ARTICLE
Marco Esposito, Simone Marzorati, Alberto Belli, Chiara Ladina, Lorenzo Palma, Carlo Calamita, Debora Pantaleo, Paola Pierleoni
This article describes a dataset of acceleration signals acquired from a low-cost Wireless Sensor Network (WSN) during seismic events that occurred in Central Italy. The WSN consists of 5 low-cost sensor nodes, each embedding an ADXL355 tri-axial MEMS accelerometer with a fixed sampling frequency of 250 Hz. The data was acquired from February 2023 to the end of June 2023. During this period, several earthquake sequences affected the area where the sensor network was installed. Continuous data was acquired from the WSN and then trimmed around the origin time of seismic events that occurred near the installation site, close to the city of Pollenza (MC), Italy...
April 2024: Data in Brief
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