keyword
MENU ▼
Read by QxMD icon Read
search

Sensors, wearables

keyword
https://www.readbyqxmd.com/read/28220163/a-microneedle-biosensor-for-minimally-invasive-transdermal-detection-of-nerve-agents
#1
Rupesh K Mishra, A M Vinu Mohan, Fernando Soto, Robert Chrostowski, Joseph Wang
A microneedle electrochemical biosensor for the minimally invasive detection of organophosphate (OP) chemical agents is described. The new sensor relies on the coupling of the effective biocatalytic action of organophosphorus hydrolase (OPH) with a hollow-microneedle modified carbon-paste array electrode transducer, and involves rapid square-wave voltammetric (SWV) measurements of the p-nitrophenol product of the OPH enzymatic reaction in the presence of the OP substrate. The scanning-potential SWV transduction mode offers an additional dimension of selectivity compared to common fixed-potential OPH-amperometric biosensors...
February 21, 2017: Analyst
https://www.readbyqxmd.com/read/28216556/a-wearable-wireless-sensor-network-for-indoor-smart-environment-monitoring-in-safety-applications
#2
Diego Antolín, Nicolás Medrano, Belén Calvo, Francisco Pérez
This paper presents the implementation of a wearable wireless sensor network aimed at monitoring harmful gases in industrial environments. The proposed solution is based on a customized wearable sensor node using a low-power low-rate wireless personal area network (LR-WPAN) communications protocol, which as a first approach measures CO₂ concentration, and employs different low power strategies for appropriate energy handling which is essential to achieving long battery life. These wearables nodes are connected to a deployed static network and a web-based application allows data storage, remote control and monitoring of the complete network...
February 14, 2017: Sensors
https://www.readbyqxmd.com/read/28212348/an-electromagnetic-sensor-for-the-autonomous-running-of-visually-impaired-and-blind-athletes-part-ii-the-wearable-device
#3
Marco Pieralisi, Valentina Di Mattia, Valerio Petrini, Alfredo De Leo, Giovanni Manfredi, Paola Russo, Lorenzo Scalise, Graziano Cerri
Currently, the availability of technology developed to increase the autonomy of visually impaired athletes during sports is limited. The research proposed in this paper (Part I and Part II) focuses on the realization of an electromagnetic system that can guide a blind runner along a race track without the need for a sighted guide. In general, the system is composed of a transmitting unit (widely described in Part I) and a receiving unit, whose components and main features are described in this paper. Special attention is paid to the definition of an electromagnetic model able to faithfully represent the physical mechanisms of interaction between the two units, as well as between the receiving magnetic sensor and the body of the user wearing the device...
February 16, 2017: Sensors
https://www.readbyqxmd.com/read/28212327/a-robust-random-forest-based-approach-for-heart-rate-monitoring-using-photoplethysmography-signal-contaminated-by-intense-motion-artifacts
#4
Yalan Ye, Wenwen He, Yunfei Cheng, Wenxia Huang, Zhilin Zhang
The estimation of heart rate (HR) based on wearable devices is of interest in fitness. Photoplethysmography (PPG) is a promising approach to estimate HR due to low cost; however, it is easily corrupted by motion artifacts (MA). In this work, a robust approach based on random forest is proposed for accurately estimating HR from the photoplethysmography signal contaminated by intense motion artifacts, consisting of two stages. Stage 1 proposes a hybrid method to effectively remove MA with a low computation complexity, where two MA removal algorithms are combined by an accurate binary decision algorithm whose aim is to decide whether or not to adopt the second MA removal algorithm...
February 16, 2017: Sensors
https://www.readbyqxmd.com/read/28208781/intelligent-luminance-control-of-lighting-systems-based-on-imaging-sensor-feedback
#5
Haoting Liu, Qianxiang Zhou, Jin Yang, Ting Jiang, Zhizhen Liu, Jie Li
An imaging sensor-based intelligent Light Emitting Diode (LED) lighting system for desk use is proposed. In contrast to the traditional intelligent lighting system, such as the photosensitive resistance sensor-based or the infrared sensor-based system, the imaging sensor can realize a finer perception of the environmental light; thus it can guide a more precise lighting control. Before this system works, first lots of typical imaging lighting data of the desk application are accumulated. Second, a series of subjective and objective Lighting Effect Evaluation Metrics (LEEMs) are defined and assessed for these datasets above...
February 9, 2017: Sensors
https://www.readbyqxmd.com/read/28208734/towards-building-a-computer-aided-education-system-for-special-students-using-wearable-sensor-technologies
#6
Raja Majid Mehmood, Hyo Jong Lee
Human computer interaction is a growing field in terms of helping people in their daily life to improve their living. Especially, people with some disability may need an interface which is more appropriate and compatible with their needs. Our research is focused on similar kinds of problems, such as students with some mental disorder or mood disruption problems. To improve their learning process, an intelligent emotion recognition system is essential which has an ability to recognize the current emotional state of the brain...
February 8, 2017: Sensors
https://www.readbyqxmd.com/read/28208620/a-review-of-wearable-technologies-for-elderly-care-that-can-accurately-track-indoor-position-recognize-physical-activities-and-monitor-vital-signs-in-real-time
#7
REVIEW
Zhihua Wang, Zhaochu Yang, Tao Dong
Rapid growth of the aged population has caused an immense increase in the demand for healthcare services. Generally, the elderly are more prone to health problems compared to other age groups. With effective monitoring and alarm systems, the adverse effects of unpredictable events such as sudden illnesses, falls, and so on can be ameliorated to some extent. Recently, advances in wearable and sensor technologies have improved the prospects of these service systems for assisting elderly people. In this article, we review state-of-the-art wearable technologies that can be used for elderly care...
February 10, 2017: Sensors
https://www.readbyqxmd.com/read/28208591/fusion-of-inertial-magnetic-sensor-measurements-and-map-information-for-pedestrian-tracking
#8
Shu-Di Bao, Xiao-Li Meng, Wendong Xiao, Zhi-Qiang Zhang
The wearable inertial/magnetic sensor based human motion analysis plays an important role in many biomedical applications, such as physical therapy, gait analysis and rehabilitation. One of the main challenges for the lower body bio-motion analysis is how to reliably provide position estimations of human subject during walking. In this paper, we propose a particle filter based human position estimation method using a foot-mounted inertial and magnetic sensor module, which not only uses the traditional zero velocity update (ZUPT), but also applies map information to further correct the acceleration double integration drift and thus improve estimation accuracy...
February 10, 2017: Sensors
https://www.readbyqxmd.com/read/28203074/temperature-and-ph-sensitive-wearable-materials-for-monitoring-foot-ulcers
#9
Pietro Salvo, Nicola Calisi, Bernardo Melai, Valentina Dini, Clara Paoletti, Tommaso Lomonaco, Andrea Pucci, Fabio Di Francesco, Alberto Piaggesi, Marco Romanelli
Foot ulcers account for 15% of comorbidities associated with diabetes. Presently, no device allows the status of foot ulcers to be continuously monitored when patients are not hospitalized. In this study, we describe a temperature and a pH sensor capable of monitoring diabetic foot and venous leg ulcers developed in the frame of the seventh framework program European Union project SWAN-iCare (smart wearable and autonomous negative pressure device for wound monitoring and therapy). Temperature is measured by exploiting the variations in the electrical resistance of a nanocomposite consisting of multiwalled carbon nanotubes and poly(styrene-b-(ethylene-co-butylene)-b-styrene)...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28199121/smart-contact-lenses-with-graphene-coating-for-electromagnetic-interference-shielding-and-dehydration-protection
#10
Sangkyu Lee, Insu Jo, Sangmin Kang, Bongchul Jang, Joonhee Moon, Jong Bo Park, Soochang Lee, Sichul Rho, Youngsoo Kim, Byung Hee Hong
Recently, smart contact lenses with electronic circuits have been proposed for various sensor and display applications where the use of flexible and biologically stable electrode materials is essential. Graphene is an atomically thin carbon material with a two-dimensional hexagonal lattice that shows outstanding electrical and mechanical properties as well as excellent biocompatibility. In addition, graphene is capable of protecting eyes from electromagnectic (EM) waves that may cause eye diseases such as cataracts...
February 21, 2017: ACS Nano
https://www.readbyqxmd.com/read/28195075/stretchable-array-of-metal-nanodisks-on-a-3d-sinusoidal-wavy-elastomeric-substrate-for-frequency-tunable-plasmonics
#11
Di Feng, Hui Zhang, Siyi Xu, Limei Tian, Ningfang Song
Metal nanostructures integrated with soft, elastomeric substrates provide an unusual platform with capabilities in plasmonic frequency tuning of mechanical strain. In this paper, we have prepared a tunable optical device, dense arrays of plasmonic nanodisks on a low-modulus, and high-elongation elastomeric substrate with a three-dimensional (3D) sinusoidal wavy, and their optical characteristics have been measured and analyzed in detail. Since surface plasmon is located and propagates along metal surfaces with sub-wavelength structures, and those dispersive properties are determined by the coupling strength between the individual structures, in this study, a 3D sinusoidal curve elastomeric substrate is used to mechanically control the inter-nanodisk spacing by applying straining and creating a frequency tunable plasmonic device...
February 14, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28193033/wearable-potentiometric-chloride-sweat-sensor-the-critical-role-of-the-salt-bridge
#12
Dong-Hoon Choi, Jin Seob Kim, Garry R Cutting, Peter C Searson
The components of sweat provide an array of potential biomarkers for health and disease. Sweat chloride is of interest as a biomarker for cystic fibrosis, electrolyte metabolism disorders, electrolyte balance, and electrolyte loss during exercise. Developing wearable sensors for biomarkers in sweat is a major technological challenge. Potentiometric sensors provide a relatively simple technology for on-body sweat chloride measurement, however, equilibration between reference and test solutions has limited the time over which accurate measurements can be made...
December 20, 2016: Analytical Chemistry
https://www.readbyqxmd.com/read/28192908/beyond-conventional-patterns-new-electrochemical-lithography-with-high-precision-for-patterned-film-materials-and-wearable-sensors
#13
Xiaowei Zhang, Shaojun Guo, Yanchao Han, Jing Li, Erkang Wang
We report a simple, low-cost, and brand-new electrochemical lithography technique for replicating the template pattern with high resolution at ∼2 μm. The developed method is that the electroactive material is first deposited on the patterned conductive template by the electrochemical technique and then peeled by an adhesive tape/material. The resulting film with the precise pattern shows excellent mechanical and electronic properties and promises high prospect in designing flexible electronics. This interesting approach can be performed at ambient conditions and easily generalized to pattern various electroactive materials covering metal, alloy, nonmetal, salt, oxide, and composite on different types of substrates in several seconds to a few minutes, making the mass production of flexible/rigid/stretchable patterned thin films quite possible...
February 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28190507/best-practices-in-early-phase-medical-device-development-engineering-prototyping-and-the-beginnings-of-a-quality-management-system
#14
Kristy Fearis, Aidan Petrie
Kristy Fearis is the founder and president of KPConsulting. She has held various positions in the medical device and research industry. She has led programs for medical industry leaders Medtronic, Edward Lifesciences, and Kimberly-Clark Healthcare to develop and commercialize Class II and III devices. Although a true quality management systems specialist at heart, Kristy has a passion for effectively and efficiently applying quality systems principles to early stage development to maximize benefit while minimizing impact on resources and time to market...
March 2017: Surgery
https://www.readbyqxmd.com/read/28187881/a-clinical-decision-making-mechanism-for-context-aware-and-patient-specific-remote-monitoring-systems-using-the-correlations-of-multiple-vital-signs
#15
Abdur Rahim Mohammad Forkan, Ibrahim Khalil
BACKGROUND AND OBJECTIVES: In home-based context-aware monitoring patient's real-time data of multiple vital signs (e.g. heart rate, blood pressure) are continuously generated from wearable sensors. The changes in such vital parameters are highly correlated. They are also patient-centric and can be either recurrent or can fluctuate. The objective of this study is to develop an intelligent method for personalized monitoring and clinical decision support through early estimation of patient-specific vital sign values, and prediction of anomalies using the interrelation among multiple vital signs...
February 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28184173/reliability-of-inertial-sensors-in-the-assessment-of-patients-with-vestibular-disorders-a-feasibility-study
#16
Sathish K Sankarpandi, Alice J Baldwin, Jaydip Ray, Claudia Mazzà
BACKGROUND: Vestibular disorders affect an individual's stability, balance, and gait and predispose them to falls. Traditional laboratory-based semi-objective vestibular assessments are intrusive and cumbersome provide little information about their functional ability. Commercially available wearable inertial sensors allow us to make this real life assessments objective, with a detailed view of their functional abilities. Timed Up and Go (TUG) and Postural Sway tests are commonly used tests for gait and balance assessments...
2017: BMC Ear, Nose, and Throat Disorders
https://www.readbyqxmd.com/read/28178288/monitoring-gait-in-multiple-sclerosis-with-novel-wearable-motion-sensors
#17
Yaejin Moon, Ryan S McGinnis, Kirsten Seagers, Robert W Motl, Nirav Sheth, John A Wright, Roozbeh Ghaffari, Jacob J Sosnoff
BACKGROUND: Mobility impairment is common in people with multiple sclerosis (PwMS) and there is a need to assess mobility in remote settings. Here, we apply a novel wireless, skin-mounted, and conformal inertial sensor (BioStampRC, MC10 Inc.) to examine gait characteristics of PwMS under controlled conditions. We determine the accuracy and precision of BioStampRC in measuring gait kinematics by comparing to contemporary research-grade measurement devices. METHODS: A total of 45 PwMS, who presented with diverse walking impairment (Mild MS = 15, Moderate MS = 15, Severe MS = 15), and 15 healthy control subjects participated in the study...
2017: PloS One
https://www.readbyqxmd.com/read/28166774/highly-wearable-cuff-less-blood-pressure-and-heart-rate-monitoring-with-single-arm-electrocardiogram-and-photoplethysmogram-signals
#18
Qingxue Zhang, Dian Zhou, Xuan Zeng
BACKGROUND: Long-term continuous systolic blood pressure (SBP) and heart rate (HR) monitors are of tremendous value to medical (cardiovascular, circulatory and cerebrovascular management), wellness (emotional and stress tracking) and fitness (performance monitoring) applications, but face several major impediments, such as poor wearability, lack of widely accepted robust SBP models and insufficient proofing of the generalization ability of calibrated models. METHODS: This paper proposes a wearable cuff-less electrocardiography (ECG) and photoplethysmogram (PPG)-based SBP and HR monitoring system and many efforts are made focusing on above challenges...
February 6, 2017: Biomedical Engineering Online
https://www.readbyqxmd.com/read/28164455/smart-approaches-for-assessing-free-living-energy-expenditure-following-identification-of-types-of-physical-activity
#19
REVIEW
G Plasqui
Accurate assessment of physical activity and energy expenditure has been a research focus for many decades. A variety of wearable sensors have been developed to objectively capture physical activity patterns in daily life. These sensors have evolved from simple pedometers to tri-axial accelerometers, and multi sensor devices measuring different physiological constructs. The current review focuses on how activity recognition may help to improve daily life energy expenditure assessment. A brief overview is given about how different sensors have evolved over time to pave the way for recognition of different activity types...
February 2017: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28161627/temperature-and-ph-sensors-based-on-graphenic-materials
#20
P Salvo, N Calisi, B Melai, B Cortigiani, M Mannini, A Caneschi, G Lorenzetti, C Paoletti, T Lomonaco, A Paolicchi, I Scataglini, V Dini, M Romanelli, R Fuoco, F Di Francesco
Point-of-care applications and patients' real-time monitoring outside a clinical setting would require disposable and durable sensors to provide better therapies and quality of life for patients. This paper describes the fabrication and performances of a temperature and a pH sensor on a biocompatible and wearable board for healthcare applications. The temperature sensor was based on a reduced graphene oxide (rGO) layer that changed its electrical resistivity with the temperature. When tested in a human serum sample between 25 and 43°C, the sensor had a sensitivity of 110±10Ω/°C and an error of 0...
January 27, 2017: Biosensors & Bioelectronics
keyword
keyword
57704
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"