Browsing by Author "Garcia, Elsa"
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- ItemDevelopment of an automated physical activity classification application for mobile phones.(2011-09-06) Xia, Ying; Cheung, Vivian; Garcia, Elsa; Ding, Hang; Karunaithi, MohanBACKGROUND Physical activity classification is an objective approach to assess levels of physical activity and indicates an individual s degree of functional ability It is significant for a number of the disciplines such as behavioural sciences physiotherapy etc Accelerometry is found to be a practical and low cost method for activity classification that could provide an objective and efficient measurement of people s daily activities METHODS This paper utilises a mobile phone with a built in tri axial accelerometer sensor to automatically classify normal physical activities A rule based activity classification model which can recognise 4 common daily activities lying walking sitting and standing and 6 transitions between postural orientations is introduced here In this model three types of statuses walking transition lying and sitting standing are first classified based on the kinetic energy and upright angle Transitions are then separated from walking and assigned to the corresponding type using upright angle algorithm To evaluate the performance of this developed application a trial is designed with 8 healthy adult subjects who are required to perform a 6 minute activity routine with an iPhone fixed at the waist position RESULTS Based on the evaluation result our application measures the length of time of each activity accurately and the achieved sensitivity of each activity classification exceeds 90 while the achieved specificity exceeds 96 Meanwhile regarding the transition identification the sensitivities are high in stand to sit 80 and low in sit to stand 56
- ItemUptake of a technology-assisted home-care cardiac rehabilitation program.(2011-03-15) Varnfield, Marlien; Karunanithi, Mohanraj K; Särelä, Antti; Garcia, Elsa; Fairfull, Anita; Oldenburg, Brian F; Walters, Darren LThe prevalence of cardiovascular disease a major cause of disease burden in Australia and other developed countries is increasing due to a rapidly ageing population and environmental biomedical and modifiable lifestyle factors Although cardiac rehabilitation CR programs have been shown to be beneficial and effective rates of referral uptake and utilisation of traditional hospital or community centre programs are poor Home based CR programs have been shown to be as effective as centre based programs and recent advances in information and communication technologies ICT can be used to enhance the delivery of such programs The Care Assessment Platform CAP is an integrated home based CR model incorporating ICT including a mobile phone and the internet and providing all the core components of traditional CR education physical activity exercise training behaviour modification strategies and psychological counselling The mobile phone given to patients has an integrated accelerometer and diary application for recording exercise and health information A central database with access to these data allows mentors to assess patients progress assist in setting goals revise targets and give weekly personal feedback Mentors find the mobile phone modalities practical and easy to use and preliminary results show high usage rates and acceptance of ICT by participants The provision of ICT supported home based CR programs may enable more patients in both metropolitan and remote settings to benefit from CR