Properties of traditional bamboo carrying poles have implications for user interactions

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dc.contributor.authorSchroeder, Ryan T.
dc.contributor.authorCroft, James L.
dc.contributor.authorNgo, Giang D.
dc.contributor.authorBertram, John Edward Arthur
dc.date.accessioned2018-06-27T15:40:19Z
dc.date.available2018-06-27T15:40:19Z
dc.date.issued2018-05-10
dc.description.abstractCompliant bamboo poles have long been used for load carriage in Asian cultures. Although this custom differs from Western conventions of rigid body attachments (e.g. backpack), potential benefits include reduced peak shoulder forces as well as metabolic transport cost savings. Evidence that carrying a flexible pole benefits locomotion remains mixed, perhaps in part because the properties of pole design (e.g. bamboo material, structural geometry, etc.) have largely been neglected. These properties influence vibrational forces and consequently, the energy required by the user to manage the oscillations. We collected authentic bamboo poles from northern Vietnam and characterized their design parameters. Four poles were extensively studied in the lab (load-deflection testing, resonance testing, and computed tomography scans of three-dimensional geometry), and 10 others were tested at a rural Vietnamese farm site (basic measures of form and resonance). A mass-spring-damper model was used to characterize a relationship between resonant frequency (which affects the energetics of the pole-carrier system) and pole properties concerning stiffness, damping, etc. Model predictions of resonant frequencies agreed well with empirical data. Although measured properties suggest the poles are not optimally designed to reduce peak oscillation forces, resonant frequencies are within range of a typical human walking cadence, and this is likely to have a consequence on locomotion energetics.en_US
dc.description.grantingagencyNatural Sciences and Engineering Research Council - Discovery Granten_US
dc.description.sponsorshipSponsored by the Open Access Authors Funden_US
dc.identifier.citationSchroeder, R. T., Croft, J. L., Ngo, G. D., & Bertram, J. E. A. (2018). Properties of traditional bamboo carrying poles have implications for user interactions. PLoS ONE, 13(5). https://doi.org/10.1371/journal.pone.0196208en_US
dc.identifier.doihttp://dx.doi.org/10.1371/journal.pone.0196208en_US
dc.identifier.grantnumber04823-2017en_US
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/1880/106789
dc.language.isoenen_US
dc.publisherPublic Library of Science (PLoS)en_US
dc.publisher.facultySchulich School of Engineeringen_US
dc.publisher.institutionUniversity of Calgaryen_US
dc.publisher.policyhttp://journals.plos.org/plosone/s/licenses-and-copyrighten_US
dc.rightsUnless otherwise indicated, this material is protected by copyright and has been made available with authorization from the copyright owner. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.subjectResonance frequencyen_US
dc.subjectBamboo poleen_US
dc.subjectStiffnessen_US
dc.subjectHuman locomotionen_US
dc.subjectVibrationen_US
dc.titleProperties of traditional bamboo carrying poles have implications for user interactionsen_US
dc.typejournal articleen_US
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