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dc.contributor.convenorDan V. Nicolau; Derek Abbott; Kourosh Kalantar-Zadeh; Tiziana Di Matteo;en_AU
dc.contributor.authorHarding, Jasonen_US
dc.contributor.authorSmall, Jamesen_US
dc.contributor.authorJames, Danielen_US
dc.contributor.editorEditor exceeds RIMS limiten_US
dc.date.accessioned2017-05-03T11:30:10Z
dc.date.available2017-05-03T11:30:10Z
dc.date.issued2008en_US
dc.date.modified2009-07-03T06:58:01Z
dc.identifier.refurispie.orgen_AU
dc.identifier.doi10.1117/12.759259en_AU
dc.identifier.urihttp://hdl.handle.net/10072/24604
dc.description.abstractRecent analysis of elite-level half-pipe snowboard competition has revealed a number of sport specific key performance variables (KPV's) that correlate well to score. Information on these variables is difficult to acquire and analyse, relying on collection and labour intensive manual post processing of video data. This paper presents the use of inertial sensors as a user-friendly alternative and subsequently implements signal processing routines to ultimately provide automated, sport specific feedback to coaches and athletes. The author has recently shown that the key performance variables (KPV's) of total air-time (TAT) and average degree of rotation (ADR) achieved during elite half-pipe snowboarding competition show strong correlation with an athlete's subjectively judged score. Utilising Micro-Electrochemical System (MEMS) sensors (tri-axial accelerometers) this paper demonstrates that air-time (AT) achieved during half-pipe snowboarding can be detected and calculated accurately using basic signal processing techniques. Characterisation of the variations in aerial acrobatic manoeuvres and the associated calculation of exact degree of rotation (DR) achieved is a likely extension of this research. The technique developed used a two-pass method to detect locations of half-pipe snowboard runs using power density in the frequency domain and subsequently utilises a threshold based search algorithm in the time domain to calculate air-times associated with individual aerial acrobatic manoeuvres. This technique correctly identified the air-times of 100 percent of aerial acrobatic manoeuvres within each half-pipe snowboarding run (n = 92 aerial acrobatic manoeuvres from 4 subjects) and displayed a very strong correlation with a video based reference standard for air-time calculation (r = 0.78 ᠰ.08; p value < 0.0001; SEE = 0.08 ׯ砱.16; mean bias = -0.03 ᠰ.02s) (value ᠯr ׯ砹5% CL).en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent840526 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherSPIEen_US
dc.publisher.placeUSen_US
dc.publisher.urihttp://spie.org/en_AU
dc.relation.ispartofstudentpublicationYen_AU
dc.relation.ispartofconferencenameBioMEMS and Nanotechnology IIIen_US
dc.relation.ispartofconferencetitleBioMEMS and Nanotechnology IIIen_US
dc.relation.ispartofdatefrom2007-12-05en_US
dc.relation.ispartofdateto2007-12-07en_US
dc.relation.ispartoflocationCanberraen_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchBiomedical Engineering not elsewhere classifieden_US
dc.subject.fieldofresearchcode090399en_US
dc.titleFeature extraction of performance variables in elite half-pipe snowboarding using body mounted inertial sensorsen_US
dc.typeConference outputen_US
dc.type.descriptionE1 - Conference Publications (HERDC)en_US
dc.type.codeE - Conference Publicationsen_US
gro.facultyGriffith Business School, Department of Tourism, Sport and Hotel Managementen_US
gro.rights.copyrightCopyright 2008 Society of Photo-Optical Instrumentation Engineers. This paper was published in SPIE volume 6799: Modelling and THZ Technology and is made available as an electronic reprint with permission of SPIE. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.en_AU
gro.date.issued2008
gro.hasfulltextFull Text


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