A low-cost, portable system for the assessment of the postural response of wheelchair users to perturbations

1999 ◽  
Vol 7 (4) ◽  
pp. 435-442 ◽  
Author(s):  
D.G. Kamper ◽  
T.C. Adams ◽  
S.I. Reger ◽  
M. Parnianpour ◽  
K. Barin ◽  
...  
Keyword(s):  
Low Cost ◽  
Postural Response ◽  
Wheelchair Users ◽  
Portable System

Design and Development of Low-Cost Portable System for Detection of Eye Diseases

2020 ◽  
pp. 495-501
Author(s):  
Jaya Prasad ◽  
Reema Anne Roy ◽  
Monish Mohan Kora ◽  
Abin Sam ◽  
Chriso Christudhas ◽  
...  
Keyword(s):  
Low Cost ◽  
Eye Diseases ◽  
Design And Development ◽  
Portable System

Low-Cost Portable System to Support People with Visual Disabilities

2021 ◽  
pp. 954-960
Author(s):  
Juan Diego Pardo ◽  
Alexander Cerón Correa
Keyword(s):  
Low Cost ◽  
Visual Disabilities ◽  
Portable System

scholarly journals Development and On-Field Testing of Low-Cost Portable System for Monitoring PM2.5 Concentrations

Sensors ◽  
2018 ◽  
Vol 18 (4) ◽  
pp. 1056 ◽  
Author(s):  
Konstantinos N. Genikomsakis ◽  
Nikolaos-Fivos Galatoulas ◽  
Panagiotis I. Dallas ◽  
Luis Candanedo Ibarra ◽  
Dimitris Margaritis ◽  
...  
Keyword(s):  
Low Cost ◽  
Field Testing ◽  
Portable System

A low-cost smartphone controlled portable system with accurately confined on-chip 3D electrodes for flow-through cell electroporation

2020 ◽  
Vol 134 ◽  
pp. 107486
Author(s):  
Chao Han ◽  
Xiwen He ◽  
Jie Wang ◽  
Lingeng Gao ◽  
Guang Yang ◽  
...  
Keyword(s):  
Low Cost ◽  
Cell Electroporation ◽  
3D Electrodes ◽  
Portable System ◽  
Flow Through ◽  
On Chip

HARKBird: Exploring Acoustic Interactions in Bird Communities Using a Microphone Array

2017 ◽  
Vol 29 (1) ◽  
pp. 213-223 ◽  
Author(s):  
Reiji Suzuki ◽  
◽  
Shiho Matsubayashi ◽  
Richard W. Hedley ◽  
Kazuhiro Nakadai ◽  
...  
Keyword(s):  
Single Channel ◽  
Microphone Array ◽  
Low Cost ◽  
Current Status ◽  
Bird Songs ◽  
Intelligent Robots ◽  
Robot Audition ◽  
The Usa ◽  
Portable System ◽  
Auditory Scenes

[abstFig src='/00290001/20.jpg' width='300' text='Bird songs recorded and localized by HARKBird' ] Understanding auditory scenes is important when deploying intelligent robots and systems in real-world environments. We believe that robot audition can better recognize acoustic events in the field as compared to conventional methods such as human observation or recording using single-channel microphone array. We are particularly interested in acoustic interactions among songbirds. Birds do not always vocalize at random, for example, but may instead divide a soundscape so that they avoid overlapping their songs with those of other birds. To understand such complex interaction processes, we must collect much spatiotemporal data in which multiple individuals and species are singing simultaneously. However, it is costly and difficult to annotate many or long recorded tracks manually to detect their interactions. In order to solve this problem, we are developing HARKBird, an easily-available and portable system consisting of a laptop PC with open-source software for robot audition HARK (Honda Research Institute Japan Audition for Robots with Kyoto University) together with a low-cost and commercially available microphone array. HARKBird enables us to extract the songs of multiple individuals from recordings automatically. In this paper, we introduce the current status of our project and report preliminary results of recording experiments in two different types of forests – one in the USA and the other in Japan – using this system to automatically estimate the direction of arrival of the songs of multiple birds, and separate them from the recordings. We also discuss asymmetries among species in terms of their tendency to partition temporal resources.

scholarly journals Design and validation of a low cost, high-capacity weighing device for wheelchair users and bariatrics

2016 ◽  
Vol 29 (2) ◽  
pp. 61-67 ◽  
Author(s):  
Brandon A. Sherrod ◽  
Dustin A. Dew ◽  
Rebecca Rogers ◽  
James H. Rimmer ◽  
Alan W. Eberhardt
Keyword(s):  
Low Cost ◽  
High Capacity ◽  
Wheelchair Users

A portable system for the measurement of the temporal parameters of gait

2001 ◽  
Vol 25 (2) ◽  
pp. 96-101 ◽  
Author(s):  
V. Kyriazis ◽  
C. Rigas ◽  
T. Xenakis
Keyword(s):  
Gait Analysis ◽  
Gait Cycle ◽  
Low Cost ◽  
Single Step ◽  
Healthy Adults ◽  
Cycle Duration ◽  
Temporal Parameters ◽  
Step Duration ◽  
Portable System ◽  
Single Limb Support

An easy-to-use, low cost, portable system is presented. It consists of a transmitter, four electrical sensors, a receiver and a PC with the appropriate software. The system can assess footfall timing, that is the single limb support, double limb support, single step duration values, and the gait cycle duration.This system has been tested for its accuracy with known signals. Then, measurements on a group of twenty (20) healthy adults were performed, with statistically insignificant (p>0.2) results to those reported in the literature. The above prove the system's validity for temporal gait analysis

scholarly journals Use of a Low-Cost, Chest-Mounted Accelerometer to Evaluate Transfer Skills of Wheelchair Users During Everyday Activities: Observational Study (Preprint)

2018 ◽  
Author(s):  
Giulia Barbareschi ◽  
Catherine Holloway ◽  
Nadia Bianchi-Berthouze ◽  
Sharon Sonenblum ◽  
Stephen Sprigle
Keyword(s):  
Predictive Accuracy ◽  
Multinomial Logistic Regression ◽  
Low Cost ◽  
Relevant Literature ◽  
Machine Learning Algorithms ◽  
Support Vector ◽  
Accelerometer Data ◽  
Wheelchair Users ◽  
Limb Injuries ◽  
Evaluation And Monitoring

BACKGROUND Transfers are an important skill for many wheelchair users (WU). However, they have also been related to the risk of falling or developing upper limb injuries. Transfer abilities are usually evaluated in clinical settings or biomechanics laboratories, and these methods of assessment are poorly suited to evaluation in real and unconstrained world settings where transfers take place. OBJECTIVE The objective of this paper is to test the feasibility of a system based on a wearable low-cost sensor to monitor transfer skills in real-world settings. METHODS We collected data from 9 WU wearing triaxial accelerometer on their chest while performing transfers to and from car seats and home furniture. We then extracted significant features from accelerometer data based on biomechanical considerations and previous relevant literature and used machine learning algorithms to evaluate the performance of wheelchair transfers and detect their occurrence from a continuous time series of data. RESULTS Results show a good predictive accuracy of support vector machine classifiers when determining the use of head-hip relationship (75.9%) and smoothness of landing (79.6%) when the starting and ending of the transfer are known. Automatic transfer detection reaches performances that are similar to state of the art in this context (multinomial logistic regression accuracy 87.8%). However, we achieve these results using only a single sensor and collecting data in a more ecological manner. CONCLUSIONS The use of a single chest-placed accelerometer shows good predictive accuracy for algorithms applied independently to both transfer evaluation and monitoring. This points to the opportunity for designing ubiquitous-technology based personalized skill development interventions for WU. However, monitoring transfers still require the use of external inputs or extra sensors to identify the start and end of the transfer, which is needed to perform an accurate evaluation.

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