Read by QxMD icon Read

"Motion sensors"

Zhen Li, Zhiqiang Wei, Lei Huang, Shugang Zhang, Jie Nie
Human activity recognition is important for healthcare and lifestyle evaluation. In this paper, a novel method for activity recognition by jointly considering motion sensor data recorded by wearable smart watches and image data captured by RGB-Depth (RGB-D) cameras is presented. A normalized cross correlation based mapping method is implemented to establish association between motion sensor data with corresponding image data from the same person in multi-person situations. Further, to improve the performance and accuracy of recognition, a hierarchical structure embedded with an automatic group selection method is proposed...
October 15, 2016: Sensors
L Müller, D Weinert
In a natural environment, social abilities of an animal are important for its survival. Particularly, it must recognize its own social rank and the social rank of a conspecific and have a good social memory. While the role of the circadian system for object and spatial recognition and memory is well known, the impact of the social rank and circadian disruptions on social recognition and memory were not investigated so far. In the present study, individual recognition of social rank and social memory performance of Djungarian hamsters revealing different circadian phenotypes were investigated...
October 12, 2016: Behavioural Processes
Naveen N Jason, Stephen J Wang, Sushrut Bhanushali, Wenlong Cheng
This work demonstrates a facile "paint-on" approach to fabricate highly stretchable and highly sensitive strain sensors by combining one-dimensional copper nanowire networks with two-dimensional graphite microflakes. This paint-on approach allows for the fabrication of electronic skin (e-skin) patches which can directly replicate with high fidelity the human skin surface they are on, regardless of the topological complexity. This leads to high accuracy for detecting biometric signals for applications in personalised wearable sensors...
September 22, 2016: Nanoscale
Hyelynn Song, Taewoo Kim, Hyeongwook Im, Raquel Ovalle-Robles, Tae June Kang, Yong Hyup Kim
A carbon nanotube (CNT) sheet nanogenerator that does not require any liquid or gas flow for power generation is developed on the basis of Coulombic interactions, making the device attractive as a building block for self-powered sensors. The working principle of the CNT nanogenerator is probed in terms of sweeping speed, distance between charged object and nanotube sheet, surface charge, and number of layers of nanotube sheet. The nature of the CNT sheet and its formation process is such that simply winding the CNT sheet stripe n times around a substrate leads to increasing the power n times...
September 22, 2016: Nanoscale
Marije van der Lende, Fieke M E Cox, Gerhard H Visser, Josemir W Sander, Roland D Thijs
OBJECTIVE: Following a sudden death at a residential care unit, the Dutch Health and Care Inspectorate advised intensification of the use of video monitoring (VM) at the unit. We assessed whether VM resulted in increased identification of seizures that required clinical intervention. METHODS: The unit provides care for 340 individuals with refractory epilepsy and severe learning disabilities. Acoustic detection systems (ADSs) cover all individuals; 37 people also have a bed motion sensor (BMS) and 46 people with possible nocturnal seizures are now monitored by VM...
September 30, 2016: Epilepsia
Ruth McCullagh, Christina Dillon, Ann Marie O'Connell, N Frances Horgan, Suzanne Timmons
OBJECTIVES: To measure the step-count accuracy of an ankle-worn accelerometer, a thigh-worn accelerometer and one pedometer in older and frail inpatients. DESIGN: Cross-sectional design study. SETTING: Research room within a hospital. PARTICIPANTS: Convenience sample of inpatients aged ≥65 years, able to walk 20 metres unassisted, with or without a walking-aid. INTERVENTION: Patients completed a 40-minute programme of predetermined tasks while wearing the three motion sensors simultaneously...
September 22, 2016: Archives of Physical Medicine and Rehabilitation
(no author information available yet)
No abstract text is available yet for this article.
September 23, 2016: British Dental Journal
Franz Worek, Thomas Seeger, Katharina Neumaier, Timo Wille, Horst Thiermann
The increased interest of terrorist groups in toxic chemicals and chemical warfare agents presents a continuing threat to our societies. Early warning and detection is a key component for effective countermeasures against such deadly agents. Presently available and near term solutions have a number of major drawbacks, e.g. lack of automated, remote warning and detection of primarily low volatile chemical warfare agents. An alternative approach is the use of animals as sentinels for exposure to toxic chemicals...
September 14, 2016: Toxicology Letters
Song Chen, Yong Wei, Siman Wei, Yong Lin, Lan Liu
Strain sensors with ultrahigh sensitivity under microstrain have numerous potential applications in heartbeat monitoring, pulsebeat detection, sound signal acquisition, and recognition. In this work, a two-part strain sensor (i.e., polyurethane part and brittle conductive hybrid particles layer on top) based on silver nanowires/graphene hybrid particles is developed via a simple coprecipitation, reduction, vacuum filtration, and casting process. Because of the nonuniform interface, weak interfacial bonding, and the hybrid particles' point-to-point conductive networks, the crack and overlap morphologies are successfully formed on the strain sensor after a prestretching; the crack-based stain sensor exhibits gauge factors as high as 20 (Δε < 0...
September 28, 2016: ACS Applied Materials & Interfaces
Shinya Takazawa, Tetsuya Ishimaru, Kanako Harada, Kyoichi Deie, Jun Fujishiro, Naohiko Sugita, Mamoru Mitsuishi, Tadashi Iwanaka
PURPOSE: We previously developed a pediatric thoracoscopic surgical simulator and showed its construct validity. In this study, the same skill assessment experiments were conducted in an additional 31 surgeons and the results of 53 surgeons in total were analyzed. METHODS: A suture pad with force sensors was placed in a rapid-prototyped pediatric chest model of a 1-year-old patient. Participants completed the endoscopic intracorporeal suturing and knot-tying task, both in the pediatric chest model setup and in a box trainer setup...
September 2016: Journal of Laparoendoscopic & Advanced Surgical Techniques. Part A
Jose M Trejo-Gabriel-Galan, V Rogel-Melgosa, S Gonzalez, J Sedano, J R Villar, N Arenaza-Basterrechea
BACKGROUND: Hemineglect is frequent after right hemisphere stroke and prevents functional independence, but effective rehabilitation interventions are lacking. Our objective was to determine if a visual-acoustic alarm in the hemineglect arm activated by a certain discrepancy in movement of both hands can enhance neglect arm use in five tasks of daily living. METHODS: In this pre-post intervention study 9 stroke patients with residual hemineglect of the arm were trained for 7 days in five bimanual tasks of daily living: carrying a tray, button fastening, cutting food with knife and fork, washing the face with both hands and arm sway while walking...
2016: Journal of Neuroengineering and Rehabilitation
Mayank Baranwal, Ram S Gorugantu, Srinivasa M Salapaka
Atomic force microscopy typically relies on high-resolution high-bandwidth cantilever deflection measurements based control for imaging and estimating sample topography and properties. More precisely, in amplitude-modulation atomic force microscopy (AM-AFM), the control effort that regulates deflection amplitude is used as an estimate of sample topography; similarly, contact-mode AFM uses regulation of deflection signal to generate sample topography. In this article, a control design scheme based on an additional feedback mechanism that uses vertical z-piezo motion sensor, which augments the deflection based control scheme, is proposed and evaluated...
August 2016: Review of Scientific Instruments
Tim Fleiner, Peter Haussermann, Sabato Mellone, Wiebren Zijlstra
BACKGROUND: The assessment of patients' motor behavior is a key challenge in dementia care. Common geriatric assessment questionnaires or actigraphy measurements often lack methodological quality and are unsuitable to individually tailor interventions. Hence, there is a need for developing objective tools to assess patterns of motor behavior. Therefore, the feasibility of a sensor-based assessment of mobility-related behavior in patients with dementia is investigated. METHODS: A cross-sectional investigation on three dementia care wards in a psychiatric hospital was conducted...
October 2016: International Psychogeriatrics
William C Eberhardt, Brendan F Wakefield, Christin T Murphy, Caroline Casey, Yousef Shakhsheer, Benton H Calhoun, Colleen Reichmuth
Nature has shaped effective biological sensory systems to receive complex stimuli generated by organisms moving through water. Similar abilities have not yet been fully developed in artificial systems for underwater detection and monitoring, but such technology would enable valuable applications for military, commercial, and scientific use. We set out to design a fluid motion sensor array inspired by the searching performance of seals, which use their whiskers to find and follow underwater wakes. This sensor prototype, called the Wake Information Detection and Tracking System (WIDTS), features multiple whisker-like elements that respond to hydrodynamic disturbances encountered while moving through water...
2016: Bioinspiration & Biomimetics
Gertrúd Tamás, Andrea Kelemen, Péter Radics, István Valálik, Dustin Heldman, Péter Klivényi, László Vécsei, Eszter Hidasi, László Halász, Dávid Kis, Péter Barsi, Péter Golopencza, Loránd Erőss
INTRODUCTION: A different innervation pattern of proximal and distal muscles from the contra- and ipsilateral motor circuits raises the question as to whether bilateral, contra- and ipsilateral subthalamic stimulation may have different effects on the distal and proximal movements of the upper limb. To answer this question, we performed kinematic analyzes in patients with Parkinson's disease. METHODS: Twenty-eight Parkinsonian patients treated by bilateral subthalamic stimulation were examined with an age-matched control group of 28 healthy subjects...
October 1, 2016: Brain Research
Daniel Fabbri, Jesse M Ehrenfeld
No abstract text is available yet for this article.
October 2016: Journal of Medical Systems
Yuta Murayama, Lizhen Hu, Kaoru Sakatani
In order to clarify the central mechanism controlling respiratory rate during mental stress, we examined the relation between prefrontal cortex (PFC) activity and respiratory rate during mental arithmetic (MA) tasks. Employing two-channel near-infrared spectroscopy (NIRS), we measured hemoglobin (Hb) concentration changes in the bilateral PFC during MA tasks in normal adults. To evaluate asymmetry of the PFC activity, we calculated the laterality index (LI); (R-L)/(R + L) of oxy-Hb concentration changes (R = right, L = left); positive LI scores indicate right-dominant activity, while negative scores indicate left-dominant activity...
2016: Advances in Experimental Medicine and Biology
Ye-Seul Lee, Won-Mo Jung, In-Seon Lee, Hyangsook Lee, Hi-Joon Park, Younbyoung Chae
Acupuncture manipulation varies widely among practitioners in clinical settings, and it is difficult to teach novice students how to perform acupuncture manipulation techniques skillfully. The Acupuncture Manipulation Education System (AMES) is an open source software system designed to enhance acupuncture manipulation skills using visual feedback. Using a phantom acupoint and motion sensor, our method for acupuncture manipulation training provides visual feedback regarding the actual movement of the student's acupuncture manipulation in addition to the optimal or intended movement, regardless of whether the manipulation skill is lifting, thrusting, or rotating...
2016: Journal of Visualized Experiments: JoVE
Weixing Song, Baoheng Gan, Tao Jiang, Yue Zhang, Aifang Yu, Hongtao Yuan, Ning Chen, Chunwen Sun, Zhong Lin Wang
A flexible and low-cost triboelectric nanogenerator (TENG) based on a patterned aluminum-plastic film and an entrapped cantilever spring leaf is developed as a self-powered sensitive triboelectric sensor for sleep-body movement monitoring. The working mechanism and the impact factors of electric output performance were systematically investigated and elaborated. Due to the patterned nanostructures of the recently designed TENG, both the output voltage and current are greatly enhanced, and thereby the sensitivity of the device is significantly improved...
August 23, 2016: ACS Nano
Saskia Robben, Gwenn Englebienne, Ben Krose
Sensor systems can be deployed in the homes of older adults living alone for functional health assessments. Their information is very useful for health care specialists. The problem lies in developing person independent models while facing a large variability in behavior. We address this problem by, firstly, proposing a new feature extraction method for data from ambient motion sensors. The method uses functional similarities between houses and daily structure to extract meaningful features. Secondly, we propose a change-based approach for analyzing data, taking difference scores of both the sensor features and health metrics...
July 22, 2016: IEEE Journal of Biomedical and Health Informatics
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"