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Description:: In this document, I demonstrate that: 1) Linear basis functions cannot outperform nonlinear ones to represent hand kinematics 2) Nonlinear autoencoders outperform PCA on the dimensionality reduction of hand kinematics, 3) Nonlinear autoencoders outperform PCA in human gait representation and recurrent nonlinear autoencoders can seamlessly express the temporal dynamics, 4)...
Keyword:: kinematics, prosthetics, machine learning, gait, dimensionality reduction, and hand
Subject:: Engineering
Creator:: Portnova-Fahreeva, Alexandra
Owner:: Scholarly Digital Publishing
Language:: en
Date Uploaded:: 09/22/2022
Date Created:: 2022-01-01
Resource Type:: Dissertation
Alternate Identifier:: http://dissertations.umi.com/northwestern:16176 and etdadmin_upload_920776

Description:: Humans have a remarkable ability to walk on a variety of surfaces. Compliant, uneven, or even slippery surfaces present little challenge to most people, yet are hazardous to individuals with locomotor impairments and even to bipedal robotic systems designed to mimic what we understand about human locomotion. Our ability to...
Keyword:: slippery surfaces, ankle impedance, electromyography, prosthetic limbs, and gait
Subject:: Biomedical Engineering
Creator:: Mariah Weaver Whitmore
Owner:: Scholarly Digital Publishing
Date Uploaded:: 01/09/2019
Date Modified:: 01/09/2019
Date Created:: 2017-01-01
Resource Type:: Dissertation

Description:: Step length is a common measurement taken during gait analyses. It allows one to determine asymmetries between the two legs, compare differences between subjects, and even compare intra-subject differences for changing parameters. Yet there has been little investigation of step length specifically and how it is modulated during walking. This...
Keyword:: walking, motion analysis, prostheses, amputation, step length, and gait
Subject:: Biomedical Engineering
Creator:: Pinata Hungspreugs Sessoms
Owner:: Scholarly Digital Publishing
Date Uploaded:: 10/08/2018
Date Modified:: 10/08/2018
Date Created:: 2008-12-04
Resource Type:: Dissertation

Description:: The role that spinal motion plays during ambulation is not clearly understood. Little in vivo regional spinal motion data exists in the literature with regard to walking and most gait models disregard the upper body altogether, or regard it as a single rigid structure. This study aims to increase understanding...
Keyword:: thoraco-lumbo-sacral orthosis, walking, spinal restriction, kinematic model, spine motion, and gait
Subject:: Biomedical Engineering
Creator:: Regina Jane Konz
Owner:: Scholarly Digital Publishing
Date Uploaded:: 05/21/2018
Date Modified:: 05/21/2018
Date Created:: 2007-04-13
Resource Type:: Dissertation

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