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Virginia Tech
1.
Zhang, Xiaoyue.
Fall Risk Assessment By Measuring Determinants Of Gait.
Degree: PhD, Industrial and Systems Engineering, 2013, Virginia Tech
URL: http://hdl.handle.net/10919/24535
► Fall accidents are one of the most serious problems leading to unintentional injuries and fatalities among older adults. However, it is difficult to assess individuals'…
(more)
▼ Fall accidents are one of the most serious problems leading to unintentional injuries and fatalities among older adults. However, it is difficult to assess individuals' fall risk and to determine who are at risk of falls and in need of fall interventions. Therefore, this study was motivated by a need to provide a cogent fall risk assessment strategy that may be conducive to various wireless platforms. It aimed at developing a fall risk assessment method for evaluating individuals' fall risk by providing diagnostic modalities associated with gait.
In this study, a "determinants of gait" model was adopted to analyze gait characteristics and associate them with fall risk. As a proof of concept, this study concentrated on slip-induced falls and the slip initiation risks. Two important parameters of determinants of gait, i.e. the pelvic rotation and the knee flexion, were found to be associated with slip initiation severity. This relationship appeared to be capable of differentiating fallers and non-fallers within older adults, as well as differentiating normal walking conditions and constrained walking conditions. Furthermore, this study also leveraged portable wireless sensor techniques and investigated if miniature
inertial measurement units could effectively measure the important parameters of determinants of gait, and therefore assess slip and fall risk. Results in this study suggested that pelvic
rotation and knee flexion measured by the
inertial measurement units can be used as a substitution of the traditional motion capture system and can assess slip and fall risk with fairly good accuracy.
As a summary, findings of this study filled the knowledge gap about how critical gait characteristics can influence slip and fall risk, and demonstrated a new solution to assess slip and fall risk with low cost and high efficiency.
Advisors/Committee Members: Lockhart, Thurmon E. (committeechair), Bish, Douglas R. (committee member), Roberto, Karen A. (committee member), Agnew, Michael J. (committee member).
Subjects/Keywords: fall risk; gait study; inertial measurement units
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Chicago ·
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APA (6th Edition):
Zhang, X. (2013). Fall Risk Assessment By Measuring Determinants Of Gait. (Doctoral Dissertation). Virginia Tech. Retrieved from http://hdl.handle.net/10919/24535
Chicago Manual of Style (16th Edition):
Zhang, Xiaoyue. “Fall Risk Assessment By Measuring Determinants Of Gait.” 2013. Doctoral Dissertation, Virginia Tech. Accessed April 17, 2021.
http://hdl.handle.net/10919/24535.
MLA Handbook (7th Edition):
Zhang, Xiaoyue. “Fall Risk Assessment By Measuring Determinants Of Gait.” 2013. Web. 17 Apr 2021.
Vancouver:
Zhang X. Fall Risk Assessment By Measuring Determinants Of Gait. [Internet] [Doctoral dissertation]. Virginia Tech; 2013. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10919/24535.
Council of Science Editors:
Zhang X. Fall Risk Assessment By Measuring Determinants Of Gait. [Doctoral Dissertation]. Virginia Tech; 2013. Available from: http://hdl.handle.net/10919/24535

Lehigh University
2.
Zhu, Xiyuan.
A Miniature Datalogger for Monitoring Sediment Transportation.
Degree: MS, Electrical Engineering, 2020, Lehigh University
URL: https://preserve.lehigh.edu/etd/5811
This paper presents an data processing method for underwater datalogger device designed for a civil engineering application to find the interaction between water flow and the granular material. Datalogger employs inertial measurement units (IMU) to measur
Advisors/Committee Members: Rosa . Zheng.
Subjects/Keywords: inertial measurement units; Electrical and Electronics
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APA (6th Edition):
Zhu, X. (2020). A Miniature Datalogger for Monitoring Sediment Transportation. (Thesis). Lehigh University. Retrieved from https://preserve.lehigh.edu/etd/5811
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Zhu, Xiyuan. “A Miniature Datalogger for Monitoring Sediment Transportation.” 2020. Thesis, Lehigh University. Accessed April 17, 2021.
https://preserve.lehigh.edu/etd/5811.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Zhu, Xiyuan. “A Miniature Datalogger for Monitoring Sediment Transportation.” 2020. Web. 17 Apr 2021.
Vancouver:
Zhu X. A Miniature Datalogger for Monitoring Sediment Transportation. [Internet] [Thesis]. Lehigh University; 2020. [cited 2021 Apr 17].
Available from: https://preserve.lehigh.edu/etd/5811.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Zhu X. A Miniature Datalogger for Monitoring Sediment Transportation. [Thesis]. Lehigh University; 2020. Available from: https://preserve.lehigh.edu/etd/5811
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Johannesburg
3.
Roets, Sarel Frederik.
Monte Carlo simulations on a graphics processor unit with applications in inertial navigation.
Degree: 2012, University of Johannesburg
URL: http://hdl.handle.net/10210/4528
► M.Ing.
The Graphics Processor Unit (GPU) has been in the gaming industry for several years now. Of late though programmers and scientists have started to…
(more)
▼ M.Ing.
The Graphics Processor Unit (GPU) has been in the gaming industry for several years now. Of late though programmers and scientists have started to use the parallel processing or stream processing capabilities of the GPU in general numerical applications. The Monte Carlo method is a processing intensive methods, as it evaluates systems with stochastic components. The stochastic components require several iterations of the systems to develop an idea of how the systems reacts to the stochastic inputs. The stream processing capabilities of GPUs are used for the analysis of such systems. Evaluating low-cost Inertial Measurement Units (IMU) for utilisation in Inertial Navigation Systems (INS) is a processing intensive process. The non-deterministic or stochastic error components of the IMUs output signal requires multiple simulation runs to properly evaluate the IMUs performance when applied as input to an INS. The GPU makes use of stream processing, which allows simultaneous execution of the same algorithm on multiple data sets. Accordingly Monte Carlo techniques are applied to create trajectories for multiple possible outputs of the INS based on stochastically varying inputs from the IMU. The processing power of the GPU allows simultaneous Monte Carlo analysis of several IMUs. Each IMU requires a sensor error model, which entails calibration of each IMU to obtain numerical values for the main error sources of lowcost IMUs namely scale factor, non-orthogonality, bias, random walk and white noise. Three low-cost MEMS IMUs was calibrated to obtain numerical values for their sensor error models. Simultaneous Monte Carlo analysis of each of the IMUs is then done on the GPU with a resulting circular error probability plot. The circular error probability indicates the accuracy and precision of each IMU relative to a reference trajectory and the other IMUs trajectories. Results obtained indicate the GPU to be an alternative processing platform, for large amounts of data, to that of the CPU. Monte Carlo simulations on the GPU was performed 200 % faster than Monte Carlo simulations on the CPU. Results obtained from the Monte Carlo simulations, indicated the Random Walk error to be the main source of error in low-cost IMUs. The CEP results was used to determine the e ect of the various error sources on the INS output.
Subjects/Keywords: Monte Carlo method; Graphics processing units; Inertial navigation systems; Inertial measurement units
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Roets, S. F. (2012). Monte Carlo simulations on a graphics processor unit with applications in inertial navigation. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/4528
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Roets, Sarel Frederik. “Monte Carlo simulations on a graphics processor unit with applications in inertial navigation.” 2012. Thesis, University of Johannesburg. Accessed April 17, 2021.
http://hdl.handle.net/10210/4528.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Roets, Sarel Frederik. “Monte Carlo simulations on a graphics processor unit with applications in inertial navigation.” 2012. Web. 17 Apr 2021.
Vancouver:
Roets SF. Monte Carlo simulations on a graphics processor unit with applications in inertial navigation. [Internet] [Thesis]. University of Johannesburg; 2012. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10210/4528.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Roets SF. Monte Carlo simulations on a graphics processor unit with applications in inertial navigation. [Thesis]. University of Johannesburg; 2012. Available from: http://hdl.handle.net/10210/4528
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
4.
Chatterjee, Gaurav.
Développement d'une unité de mesure inertielle à base de Smart-MEMS : Smart-MEMS based Inertial Measurement Units : Improving the performance of gyroscopes using high-grade accelerometers.
Degree: Docteur es, Systèmes automatiques et micro-électroniques, 2016, Montpellier
URL: http://www.theses.fr/2016MONTT310
► La navigation par système inertiel strapdown est aujourd’hui la plus répandue. L’architecture est bien connue et a été très largement améliorée au cours des dernières…
(more)
▼ La navigation par système inertiel strapdown est aujourd’hui la plus répandue. L’architecture est bien connue et a été très largement améliorée au cours des dernières décennies. Néanmoins, le principe fondamental n’a subi de bouleversement et reste constitué d’une triplette d’accéléromètres et de gyromètres permettant de revenir aux informations d’attitude et de cap.La précision de l’estimation de position repose principalement sur la gamme de performance des capteurs utilisés. En particulier, des applications telles que des lanceurs spatiaux requièrent une très haute précision et des capteurs d’une technologie éprouvée sont utilisés. L’arrivée sur le marché de capteurs inertiels MEMS de haute précision ouvre une alternative à coût réduits couplée à une réduction de masse, volume et de consommation. Les moyens de production des MEMS ainsi qu’une meilleure connaissance des propriétés des matériaux ont permis l’arrivée d’accéléromètres MEMS pouvant rivaliser avec les technologies éprouvées de gamme tactique. Toutefois, les gyromètres de technologie MEMS existantes restent dans une gamme de performance de type industrielle.La présente étude vise à analyser la possibilité d’utiliser des accéléromètres de haute précision pour améliorer les performances gyrométriques, dans l’objectif de réaliser une solution tout MEMS d’unité de mesure inertielle. Une brève introduction sur les techniques de filtrage de Kalman pour la fusion de données est présentée, ainsi que son implémentation pour notre étude. L’analyse théorique se poursuit avec une présentation des résultats expérimentaux.L’étude conclut que l’utilisation d’une paire d’accéléromètres de haute performance et d’un gyroscope de type consommateur permet d’atteindre les performances d’un gyromètre tactique. Les contraintes de définition et de mesure pour l’implémentation du système sont présentées en détail.Cette étude est menée pour la mesure angulaire autour d’un axe unique de rotation, un complément d’étude est nécessaire à l’extrapolation de cette approche pour une mesure générique en 3D.
Strapdown inertial navigation units are the most popular systems used for navigation. The system architecture is well established and has been extensively improved over the past decades. However, the core idea remains same where a triad of accelerometers and gyroscopes provide the attitude and heading information.The accuracy of the position estimate depends on the performance grade of the sensors employed. For applications like space launchers requiring very high accuracy, high-grade devices using traditional technologies are used. The advent of accurate MEMS based sensors offer an exciting low-cost alternative with expected reduction in size and power consumption. MEMS fabrication technology, assisted by improved understanding of material properties have led to accelerometers that can compete with traditional devices for tactical applications. However, the MEMS based solutions currently available for gyroscopes can replace only industrial grade applications.This study attempts to…
Advisors/Committee Members: Nouet, Pascal (thesis director).
Subjects/Keywords: Accéléromètres; Gyromètres; Mems; Mems; Inertial Measurement Units; Gyroscope; Accelerometer
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chatterjee, G. (2016). Développement d'une unité de mesure inertielle à base de Smart-MEMS : Smart-MEMS based Inertial Measurement Units : Improving the performance of gyroscopes using high-grade accelerometers. (Doctoral Dissertation). Montpellier. Retrieved from http://www.theses.fr/2016MONTT310
Chicago Manual of Style (16th Edition):
Chatterjee, Gaurav. “Développement d'une unité de mesure inertielle à base de Smart-MEMS : Smart-MEMS based Inertial Measurement Units : Improving the performance of gyroscopes using high-grade accelerometers.” 2016. Doctoral Dissertation, Montpellier. Accessed April 17, 2021.
http://www.theses.fr/2016MONTT310.
MLA Handbook (7th Edition):
Chatterjee, Gaurav. “Développement d'une unité de mesure inertielle à base de Smart-MEMS : Smart-MEMS based Inertial Measurement Units : Improving the performance of gyroscopes using high-grade accelerometers.” 2016. Web. 17 Apr 2021.
Vancouver:
Chatterjee G. Développement d'une unité de mesure inertielle à base de Smart-MEMS : Smart-MEMS based Inertial Measurement Units : Improving the performance of gyroscopes using high-grade accelerometers. [Internet] [Doctoral dissertation]. Montpellier; 2016. [cited 2021 Apr 17].
Available from: http://www.theses.fr/2016MONTT310.
Council of Science Editors:
Chatterjee G. Développement d'une unité de mesure inertielle à base de Smart-MEMS : Smart-MEMS based Inertial Measurement Units : Improving the performance of gyroscopes using high-grade accelerometers. [Doctoral Dissertation]. Montpellier; 2016. Available from: http://www.theses.fr/2016MONTT310

Virginia Tech
5.
Lewis, Robert Alan.
Analysis of a self-contained motion capture garment for e-textiles.
Degree: MS, Electrical and Computer Engineering, 2011, Virginia Tech
URL: http://hdl.handle.net/10919/32529
► Wearable computers and e-textiles are becoming increasingly widespread in todayâ s society. Motion capture is one of the many potential applications for on-body electronic systems.…
(more)
▼ Wearable computers and e-textiles are becoming increasingly widespread in todayâ s society. Motion capture is one of the many potential applications for on-body electronic systems. Previous work has been performed at Virginia Techâ s E-textiles Laboratory to design a framework for a self-contained loose fit motion capture system. This system gathers information from sensors distributed throughout the body on a â smartâ garment. This thesis presents the hardware and software components of the framework, along with improvements made to it. This thesis also presents an analysis of both the on-body and off-body network communication to determine how many sensors can be supported on the garment at a given time. Finally, this thesis presents a method for determining the accuracy of the smart garment and shows how it compares against a commercially available motion capture system.
Advisors/Committee Members: Martin, Thomas L. (committeechair), Athanas, Peter M. (committee member), Jones, Mark T. (committeecochair).
Subjects/Keywords: Optical Motion Capture; Inertial Measurement Units; E-textiles; Wearable Computing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lewis, R. A. (2011). Analysis of a self-contained motion capture garment for e-textiles. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/32529
Chicago Manual of Style (16th Edition):
Lewis, Robert Alan. “Analysis of a self-contained motion capture garment for e-textiles.” 2011. Masters Thesis, Virginia Tech. Accessed April 17, 2021.
http://hdl.handle.net/10919/32529.
MLA Handbook (7th Edition):
Lewis, Robert Alan. “Analysis of a self-contained motion capture garment for e-textiles.” 2011. Web. 17 Apr 2021.
Vancouver:
Lewis RA. Analysis of a self-contained motion capture garment for e-textiles. [Internet] [Masters thesis]. Virginia Tech; 2011. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10919/32529.
Council of Science Editors:
Lewis RA. Analysis of a self-contained motion capture garment for e-textiles. [Masters Thesis]. Virginia Tech; 2011. Available from: http://hdl.handle.net/10919/32529

Utah State University
6.
Givens, Matthew.
Multiple IMU Sensor Fusion for SUAS Navigation and Photogrammetry.
Degree: MS, Mechanical and Aerospace Engineering, 2019, Utah State University
URL: https://digitalcommons.usu.edu/etd/7617
► Inertial measurement units (IMUs) are devices that sense accelerations and angular rates in 3D so that vehicles and other devices can estimate their orientations,…
(more)
▼ Inertial measurement units (IMUs) are devices that sense accelerations and angular rates in 3D so that vehicles and other devices can estimate their orientations, positions, and velocities. While traditionally large, heavy, and costly, using mechanical gyroscopes and stabilized platforms, the recent development of micro-electromechanical sensor (MEMS) IMUs that are small, light, and inexpensive has led to their adoption in many everyday systems such as cell phones, video game controllers, and commercial drones. MEMS IMUs, despite their advantages, have major drawbacks when it comes to accuracy and reliability. The idea of using more than one of these sensors in an array, instead of using only one, and fusing their outputs to generate an improved solution is explored in this thesis.
Advisors/Committee Members: David K. Geller, Calvin R. Coopmans, Stephen A. Whitmore, ;.
Subjects/Keywords: inertial measurement units; IMUs; micro-electromechanical sensor; MEMS; Aerospace Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Givens, M. (2019). Multiple IMU Sensor Fusion for SUAS Navigation and Photogrammetry. (Masters Thesis). Utah State University. Retrieved from https://digitalcommons.usu.edu/etd/7617
Chicago Manual of Style (16th Edition):
Givens, Matthew. “Multiple IMU Sensor Fusion for SUAS Navigation and Photogrammetry.” 2019. Masters Thesis, Utah State University. Accessed April 17, 2021.
https://digitalcommons.usu.edu/etd/7617.
MLA Handbook (7th Edition):
Givens, Matthew. “Multiple IMU Sensor Fusion for SUAS Navigation and Photogrammetry.” 2019. Web. 17 Apr 2021.
Vancouver:
Givens M. Multiple IMU Sensor Fusion for SUAS Navigation and Photogrammetry. [Internet] [Masters thesis]. Utah State University; 2019. [cited 2021 Apr 17].
Available from: https://digitalcommons.usu.edu/etd/7617.
Council of Science Editors:
Givens M. Multiple IMU Sensor Fusion for SUAS Navigation and Photogrammetry. [Masters Thesis]. Utah State University; 2019. Available from: https://digitalcommons.usu.edu/etd/7617

Ohio University
7.
Mathur, Navin G.
Feasibility of using a low-cost inertial measurement unit
with centimeter accuracy differential global positioning
system.
Degree: PhD, Electrical Engineering & Computer Science
(Engineering and Technology), 1999, Ohio University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181173720
► Low-cost Inertial Navigation Systems (INS) technology has evolved rapidly over the last decade with the development of less-expensive and higher-accuracy inertial measurement units (IMU).…
(more)
▼ Low-cost
Inertial Navigation Systems (INS)
technology has evolved rapidly over the last decade with the
development of less-expensive and higher-accuracy
inertial
measurement units (IMU). The development in the field of
differential GPS (DGPS) has also matured over the past decade to
provide reliable centimeter level accuracy in real-time. This
dissertation provides a detailed study of the feasibility of using
a low-cost IMU with accurate DGPS to achieve higher-accuracy,
reliability, and continuity of the position solution.
Detailed INS equations are provided as well as the
hardware integration of a low-cost IMU and a centimeter-level DGPS
system. The integrated system was dynamically
tested in a van and a DC-3 research aircraft. In the absence of
DGPS updates for a period of time of 10 seconds, IMU-derived
positions diverged by 5-10 meters for the van tests and by tens of
meters for flight tests. Noise on the
IMU-derived position between successive, one-second DGPS position
updates was observed to be on the order of a few millimeters for
the van tests and one centimeters for the flight
tests.
Advisors/Committee Members: van Graas, Frank (Advisor).
Subjects/Keywords: Inertial Navigation Systems; inertial measurement units; differential GPS
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mathur, N. G. (1999). Feasibility of using a low-cost inertial measurement unit
with centimeter accuracy differential global positioning
system. (Doctoral Dissertation). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181173720
Chicago Manual of Style (16th Edition):
Mathur, Navin G. “Feasibility of using a low-cost inertial measurement unit
with centimeter accuracy differential global positioning
system.” 1999. Doctoral Dissertation, Ohio University. Accessed April 17, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181173720.
MLA Handbook (7th Edition):
Mathur, Navin G. “Feasibility of using a low-cost inertial measurement unit
with centimeter accuracy differential global positioning
system.” 1999. Web. 17 Apr 2021.
Vancouver:
Mathur NG. Feasibility of using a low-cost inertial measurement unit
with centimeter accuracy differential global positioning
system. [Internet] [Doctoral dissertation]. Ohio University; 1999. [cited 2021 Apr 17].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181173720.
Council of Science Editors:
Mathur NG. Feasibility of using a low-cost inertial measurement unit
with centimeter accuracy differential global positioning
system. [Doctoral Dissertation]. Ohio University; 1999. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181173720

Queens University
8.
Conte, Jonathan.
IMU-Based Lower-limb joint angles: A comparison of methods
.
Degree: Mechanical and Materials Engineering, 2015, Queens University
URL: http://hdl.handle.net/1974/13900
► Inertial measurement units (IMUs) are a popular option for human movement analysis. The untethered, self-contained nature of IMUs overcomes many limitations of conventional measurement systems.…
(more)
▼ Inertial measurement units (IMUs) are a popular option for human movement analysis. The untethered, self-contained nature of IMUs overcomes many limitations of conventional measurement systems. The potential of IMU systems makes it worthwhile to pursue clinical and research use. However, IMUs have not proven to be sufficiently reliable or valid. Two barriers facing IMU-based joint kinematics are: (i) the misaligned, unique reference frames of each IMU in the system, hindering joint angle calculation, and (ii) anatomical calibration accuracy and reproducibility, hindering the anatomical relevance of joint angles. A comparison of available methods would help to understand and overcome the current barriers preventing IMU use. The present thesis aimed to provide these comparisons.
Several methods have been proposed to align coordinate frames. Three methods were compared mathematically and experimentally. The equivalency of all methods was proved mathematically. Experimentally, all three methods were equivalent (<2° different) in two applications relevant to biomechanics (finding a common IMU reference frame and comparing the IMU orientation to a marker-based orientation).
Several methods have also been proposed to find anatomically relevant axes of the lower limb body segments. The joint angles from five methods were compared using the joint angles of a marker-based method as reference. The methods were used for the hip, knee and ankle joint, if they were applicable. The joint angles from three of the methods were similar, while two methods had some joint angles that differed, primarily by a bias. The two dissimilar methods relied on static-normalization, which caused the errors, particularly in the transverse plane angles. Drift (degradation of IMU accuracy over time) between trials was the problem affecting the static-normalization, so it was the IMU sensor fusion and not the method itself that was the cause of dissimilarity. Further research is required to recommend one method for future use.
Overall, current methods performed similarly in both methodological options, suggesting that current research is reaching a plateau in improvements. Further research in reliability and agreement is required to understand the strengths, weaknesses and fields of improvement required for research and clinical use of IMUs in human movement analysis.
Subjects/Keywords: Anatomical Calibration
;
Inertial Measurement Units
;
Method Comparison
;
Frame Alignment
;
Joint Angles
;
Motion Capture
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Conte, J. (2015). IMU-Based Lower-limb joint angles: A comparison of methods
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/13900
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Conte, Jonathan. “IMU-Based Lower-limb joint angles: A comparison of methods
.” 2015. Thesis, Queens University. Accessed April 17, 2021.
http://hdl.handle.net/1974/13900.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Conte, Jonathan. “IMU-Based Lower-limb joint angles: A comparison of methods
.” 2015. Web. 17 Apr 2021.
Vancouver:
Conte J. IMU-Based Lower-limb joint angles: A comparison of methods
. [Internet] [Thesis]. Queens University; 2015. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/1974/13900.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Conte J. IMU-Based Lower-limb joint angles: A comparison of methods
. [Thesis]. Queens University; 2015. Available from: http://hdl.handle.net/1974/13900
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
9.
Bakhshi Khayani, Saba.
Development of Wearable Sensors for Body Joint Angle Measurement.
Degree: MS, Electrical Engineering, 2011, U of Denver
URL: https://digitalcommons.du.edu/etd/49
► This thesis presents the development of three different methods for body joint angle measurement using wearable sensors. Continuous monitoring of patients' movements and activities…
(more)
▼ This thesis presents the development of three different methods for body joint angle
measurement using wearable sensors. Continuous monitoring of patients' movements and activities has recently become one of the active research areas in the field of body sensor network and telehealth monitoring. For many medical and rehabilitation applications, a continuous monitor of the patients' daily activities at home without visiting the hospital is desirable. This type of monitoring is beneficial for the therapists and physicians as it does not require patients' physical presence. Traditionally, measuring the range of motion (ROM) is performed in hospitals by utilizing standard tools such as a goniometer. This method needs to be fulfilled by a physiotherapist in the hospital and requires great deal of overhead. Thus, a remote sensing technique for monitoring the progress of body joint flexion during regular daily life activities becomes very beneficial.
The main focus of this thesis is on developing different methods for sensing body joint angle, although we developed some mechanisms for transmitting measurements from patient's side to a remote server at the hospital. The first method for measuring the joint angle- specifically the knee joint- is based on an encoder attached to a brace. The second method is performed by utilizing a wearable cloth with flex-sensors. In the third method,
inertial measurement units (IMUs) are employed to measure the desired joint angle. We conducted several experiments to compare the feasibility and accuracy of each method for angle
measurement with ground truth measurements. The advantages and disadvantages of each approach are discussed and explained in detail in the assigned section.
Advisors/Committee Members: Mohammad H. Mahoor, Ph.D..
Subjects/Keywords: Wearable sensors; Range of motion (ROM); Inertial measurement units (IMUs); Electrical and Computer Engineering; Engineering
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APA (6th Edition):
Bakhshi Khayani, S. (2011). Development of Wearable Sensors for Body Joint Angle Measurement. (Thesis). U of Denver. Retrieved from https://digitalcommons.du.edu/etd/49
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bakhshi Khayani, Saba. “Development of Wearable Sensors for Body Joint Angle Measurement.” 2011. Thesis, U of Denver. Accessed April 17, 2021.
https://digitalcommons.du.edu/etd/49.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bakhshi Khayani, Saba. “Development of Wearable Sensors for Body Joint Angle Measurement.” 2011. Web. 17 Apr 2021.
Vancouver:
Bakhshi Khayani S. Development of Wearable Sensors for Body Joint Angle Measurement. [Internet] [Thesis]. U of Denver; 2011. [cited 2021 Apr 17].
Available from: https://digitalcommons.du.edu/etd/49.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bakhshi Khayani S. Development of Wearable Sensors for Body Joint Angle Measurement. [Thesis]. U of Denver; 2011. Available from: https://digitalcommons.du.edu/etd/49
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
10.
Lin, Jonathan Feng-Shun.
Automated Rehabilitation Exercise Motion Tracking.
Degree: 2013, University of Waterloo
URL: http://hdl.handle.net/10012/7191
► Current physiotherapy practice relies on visual observation of the patient for diagnosis and assessment. The assessment process can potentially be automated to improve accuracy and…
(more)
▼ Current physiotherapy practice relies on visual observation of the patient for diagnosis and assessment. The assessment process can potentially be automated to improve accuracy and reliability. This thesis proposes a method to recover patient joint angles and automatically extract movement profiles utilizing small and lightweight body-worn sensors.
Joint angles are estimated from sensor measurements via the extended Kalman filter (EKF). Constant-acceleration kinematics is employed as the state evolution model. The forward kinematics of the body is utilized as the measurement model. The state and measurement models are used to estimate the position, velocity and acceleration of each joint, updated based on the sensor inputs from inertial measurement units (IMUs). Additional joint limit constraints are imposed to reduce drift, and an automated approach is developed for estimating and adapting the process noise during on-line estimation.
Once joint angles are determined, the exercise data is segmented to identify each of the repetitions. This process of identifying when a particular repetition begins and ends allows the physiotherapist to obtain useful metrics such as the number of repetitions performed, or the time required to complete each repetition. A feature-guided hidden Markov model (HMM) based algorithm is developed for performing the segmentation. In a sequence of unlabelled data, motion segment candidates are found by scanning the data for velocity-based features, such as velocity peaks and zero crossings, which match the pre-determined motion templates. These segment potentials are passed into the HMM for template matching. This two-tier approach combines the speed of a velocity feature based approach, which only requires the data to be differentiated, with the accuracy of the more computationally-heavy HMM, allowing for fast and accurate segmentation.
The proposed algorithms were verified experimentally on a dataset consisting of 20 healthy subjects performing rehabilitation exercises. The movement data was collected by IMUs strapped onto the hip, thigh and calf. The joint angle estimation system achieves an overall average RMS error of 4.27 cm, when compared against motion capture data. The segmentation algorithm reports 78% accuracy when the template training data comes from the same participant, and 74% for a generic template.
Subjects/Keywords: Physiotherapy; Kalman filter; Hidden Markov model; Inertial measurement units; Forward kinematics; Segmentation and identification
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lin, J. F. (2013). Automated Rehabilitation Exercise Motion Tracking. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/7191
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Lin, Jonathan Feng-Shun. “Automated Rehabilitation Exercise Motion Tracking.” 2013. Thesis, University of Waterloo. Accessed April 17, 2021.
http://hdl.handle.net/10012/7191.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Lin, Jonathan Feng-Shun. “Automated Rehabilitation Exercise Motion Tracking.” 2013. Web. 17 Apr 2021.
Vancouver:
Lin JF. Automated Rehabilitation Exercise Motion Tracking. [Internet] [Thesis]. University of Waterloo; 2013. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10012/7191.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Lin JF. Automated Rehabilitation Exercise Motion Tracking. [Thesis]. University of Waterloo; 2013. Available from: http://hdl.handle.net/10012/7191
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Virginia Commonwealth University
11.
Lawoyin, Samuel.
Novel technologies for the detection and mitigation of drowsy driving.
Degree: PhD, Biomedical Engineering, 2014, Virginia Commonwealth University
URL: https://doi.org/10.25772/SQEA-W453
;
https://scholarscompass.vcu.edu/etd/3639
► In the human control of motor vehicles, there are situations regularly encountered wherein the vehicle operator becomes drowsy and fatigued due to the influence…
(more)
▼ In the human control of motor vehicles, there are situations regularly encountered wherein the vehicle operator becomes drowsy and fatigued due to the influence of long work days, long driving hours, or low amounts of sleep. Although various methods are currently proposed to detect drowsiness in the operator, they are either obtrusive, expensive, or otherwise impractical. The method of drowsy driving detection through the collection of Steering Wheel Movement (SWM) signals has become an important measure as it lends itself to accurate, effective, and cost-effective drowsiness detection. In this dissertation, novel technologies for drowsiness detection using
Inertial Measurement Units (IMUs) are investigated and described. IMUs are an umbrella group of kinetic sensors (including accelerometers and gyroscopes) which transduce physical motions into data. Driving performances were recorded using IMUs as the primary sensors, and the resulting data were used by artificial intelligence algorithms, specifically Support Vector Machines (SVMs) to determine whether or not the individual was still fit to operate a motor vehicle. Results demonstrated high accuracy of the method in classifying drowsiness. It was also shown that the use of a smartphone-based approach to IMU monitoring of drowsiness will result in the initiation of feedback mechanisms upon a positive detection of drowsiness. These feedback mechanisms are intended to notify the driver of their drowsy state, and to dissuade further driving which could lead to crashes and/or fatalities. The novel methods not only demonstrated the ability to qualitatively determine a drivers drowsy state, but they were also low-cost, easy to implement, and unobtrusive to drivers. The efficacy, ease of use, and ease of access to these methods could potentially eliminate many barriers to the implementation of the technologies. Ultimately, it is hoped that these findings will help enhance traveler safety and prevent deaths and injuries to users.
Advisors/Committee Members: Ding-Yu Fei.
Subjects/Keywords: Driver safety; Drowsiness; fatigue; Accidents; Accident prevention; Inertial Measurement Units; Biomedical Devices and Instrumentation; Other Biomedical Engineering and Bioengineering
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lawoyin, S. (2014). Novel technologies for the detection and mitigation of drowsy driving. (Doctoral Dissertation). Virginia Commonwealth University. Retrieved from https://doi.org/10.25772/SQEA-W453 ; https://scholarscompass.vcu.edu/etd/3639
Chicago Manual of Style (16th Edition):
Lawoyin, Samuel. “Novel technologies for the detection and mitigation of drowsy driving.” 2014. Doctoral Dissertation, Virginia Commonwealth University. Accessed April 17, 2021.
https://doi.org/10.25772/SQEA-W453 ; https://scholarscompass.vcu.edu/etd/3639.
MLA Handbook (7th Edition):
Lawoyin, Samuel. “Novel technologies for the detection and mitigation of drowsy driving.” 2014. Web. 17 Apr 2021.
Vancouver:
Lawoyin S. Novel technologies for the detection and mitigation of drowsy driving. [Internet] [Doctoral dissertation]. Virginia Commonwealth University; 2014. [cited 2021 Apr 17].
Available from: https://doi.org/10.25772/SQEA-W453 ; https://scholarscompass.vcu.edu/etd/3639.
Council of Science Editors:
Lawoyin S. Novel technologies for the detection and mitigation of drowsy driving. [Doctoral Dissertation]. Virginia Commonwealth University; 2014. Available from: https://doi.org/10.25772/SQEA-W453 ; https://scholarscompass.vcu.edu/etd/3639

University of Western Ontario
12.
Fennema, Megan.
Wearable sensors and total knee arthroplasty: Assessing quantitative function to improve the patient experience.
Degree: 2018, University of Western Ontario
URL: https://ir.lib.uwo.ca/etd/5918
► Osteoarthritis (OA) is a chronic degenerative disease for which the only long-term solution is total knee arthroplasty (TKA), though many patients are not satisfied with…
(more)
▼ Osteoarthritis (OA) is a chronic degenerative disease for which the only long-term solution is total knee arthroplasty (TKA), though many patients are not satisfied with their TKA. Satisfaction in TKA patients is not well understood. Subjective questionnaires and objective functional tests have been previously used to assess TKA outcomes, but both have disadvantages. Wearable sensors have facilitated affordable biomechanical measurement in OA and TKA populations. The objective of this work was to use wearable sensors alongside functional tests with TKA patients to identify quantitative function that related to subjective function and satisfaction. A wearable sensor-setup was validated before implementation in a TKA population. Quantitative sensor metrics describing the motion of individual leg segments was found to correlate with subjective function and satisfaction. This study provided strong evidence towards the connection between quantitative function and patient experience and may be able to identify functional deficiencies for targeted therapy to improve satisfaction.
Subjects/Keywords: Inertial measurement units; Total knee arthroplasty; Timed-up-and-go test; Biomechanics; Osteoarthritis; Patient reported outcome measures; Medical Biophysics; Orthopedics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fennema, M. (2018). Wearable sensors and total knee arthroplasty: Assessing quantitative function to improve the patient experience. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/5918
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Fennema, Megan. “Wearable sensors and total knee arthroplasty: Assessing quantitative function to improve the patient experience.” 2018. Thesis, University of Western Ontario. Accessed April 17, 2021.
https://ir.lib.uwo.ca/etd/5918.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Fennema, Megan. “Wearable sensors and total knee arthroplasty: Assessing quantitative function to improve the patient experience.” 2018. Web. 17 Apr 2021.
Vancouver:
Fennema M. Wearable sensors and total knee arthroplasty: Assessing quantitative function to improve the patient experience. [Internet] [Thesis]. University of Western Ontario; 2018. [cited 2021 Apr 17].
Available from: https://ir.lib.uwo.ca/etd/5918.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Fennema M. Wearable sensors and total knee arthroplasty: Assessing quantitative function to improve the patient experience. [Thesis]. University of Western Ontario; 2018. Available from: https://ir.lib.uwo.ca/etd/5918
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University
13.
Rodgers, Liam.
INVESTIGATING MEASUREMENT MODALITIES FOR INTEGRATED USE IN OVERUSE INJURY RESEARCH
.
Degree: Mechanical and Materials Engineering, Queens University
URL: http://hdl.handle.net/1974/28220
► Running is a common form of exercise enjoyed throughout the world. Unfortunately, it poses a significant risk of injury, as up to 70% of runners…
(more)
▼ Running is a common form of exercise enjoyed throughout the world. Unfortunately, it poses a significant risk of injury, as up to 70% of runners suffer an overuse injury within a one-year period. Previous research indicates that three overarching factors contribute to overuse injuries in running – dosage, morphology, and movement patterns; however, the threshold of these three factors combining to result in injury is specific to each athlete, and not well understood.
To aid future research of overuse injuries, we conducted two studies using three different measurement modalities. In the first study, we used Inertial Measurement Units (IMUs) to monitor gait features of participants running on a treadmill. Using statistical parametric mapping of IMU signals, the system detected changes in strike pattern, stride length, bouncing gait, and genu valgus gait. With further validation and refinement, this system would allow for monitoring of these gait features in the wild, giving researchers greater insight into the development of overuse injuries.
The second study was a pilot study, in which we investigated motion of the tibia and relative motion of the talus and calcaneus with respect to the tibia during a hopping motion. We found that internal rotation of the talus after impact leads the internal rotation of the tibia. This grants plausibility to the theory of tibiotalar coupling – that internal rotation of the tibia is driven by that of the talus. After approximately 20% of stance, the talus moves into external rotation with respect to the tibia, and we hypothesize that it acts as a buffer to allow rotational independence between the rearfoot and tibia. Additionally, this study highlighted the inherent inter-subject variability in biomechanics studies. We have shown that there is benefit and necessity in subject-specific analysis over population-wide conclusions in biomechanics.
Finally, we discuss the implications of both studies to the future of overuse injury research. The research presented is a first step toward more comprehensive studies into overuse injury etiology. Using the approaches described, researchers may be able to use a combination of measurement modalities to encompass dosage, morphology, and movement patterns in a large-scale, prospective overuse injury study.
Subjects/Keywords: Biomechanics
;
Inertial Measurement Units
;
Running Gait Analysis
;
Ankle Biomechanics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rodgers, L. (n.d.). INVESTIGATING MEASUREMENT MODALITIES FOR INTEGRATED USE IN OVERUSE INJURY RESEARCH
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/28220
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Rodgers, Liam. “INVESTIGATING MEASUREMENT MODALITIES FOR INTEGRATED USE IN OVERUSE INJURY RESEARCH
.” Thesis, Queens University. Accessed April 17, 2021.
http://hdl.handle.net/1974/28220.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Rodgers, Liam. “INVESTIGATING MEASUREMENT MODALITIES FOR INTEGRATED USE IN OVERUSE INJURY RESEARCH
.” Web. 17 Apr 2021.
Note: this citation may be lacking information needed for this citation format:
No year of publication.
Vancouver:
Rodgers L. INVESTIGATING MEASUREMENT MODALITIES FOR INTEGRATED USE IN OVERUSE INJURY RESEARCH
. [Internet] [Thesis]. Queens University; [cited 2021 Apr 17].
Available from: http://hdl.handle.net/1974/28220.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.
Council of Science Editors:
Rodgers L. INVESTIGATING MEASUREMENT MODALITIES FOR INTEGRATED USE IN OVERUSE INJURY RESEARCH
. [Thesis]. Queens University; Available from: http://hdl.handle.net/1974/28220
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
No year of publication.

Swedish University of Agricultural Sciences
14.
Persson Sjödin, Emma.
Evaluation of vertical movement asymmetries in riding horses: relevance to equine orthopaedics.
Degree: 2020, Swedish University of Agricultural Sciences
URL: https://pub.epsilon.slu.se/16718/
► Disorders of the locomotor apparatus are very common in sports horses. Pain and dysfunction associated with these conditions have a negative impact on horse welfare.…
(more)
▼ Disorders of the locomotor apparatus are very common in sports horses. Pain and dysfunction associated with these conditions have a negative impact on horse welfare. The main component in lameness evaluation is detection of vertical movement asymmetries but the inter-rater agreement among veterinarians is low. Therefore, modern methods of detection and quantification of movement asymmetry have been developed.
The aim of this thesis was to help improve equine welfare by providing a better scientific basis for interpretation of movement asymmetries. This could support riders and veterinarians in detecting lameness at an early stage and improve orthopaedic diagnostics.
To investigate a possible association between movement asymmetry and presence of painful orthopaedic conditions, NSAID (meloxicam) treatment was performed in asymmetrically moving, but presumed sound horses. Interestingly, this did not decrease the magnitude of asymmetry. Other reasons for asymmetric movement and the clinical efficacy of treatment with meloxicam in relation to a potentially present pathology therefore need to be addressed.
The influence of the rider’s seating style on vertical movement symmetry in trot was evaluated in 26 horses. ‘Rising trot’ induced systematic changes, the most prominent being a decreased pelvic rise, mimicking push-off lameness in the hindlimb of the diagonal on which the rider was sitting in ‘rising trot’.
The potential of the relationship between the direction of head and withers movement asymmetry parameters to assist in locating the primary lame limb was investigated in horses with induced lameness. The findings were then verified in horses with naturally occurring lameness. The results showed that head and withers movement asymmetry parameters indicate the same forelimb in horses with forelimb lameness, but indicate opposite forelimbs in horses with hindlimb lameness and compensatory head movement asymmetry.
The results presented in this thesis extend existing knowledge about the origin and significance of movement asymmetries in riding horses and compensatory mechanisms in lame horses
Subjects/Keywords: compensatory lameness; withers asymmetry; optical motion capture; inertial measurement units; NSAID; rising trot; rider; lameness; equine; kinematics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Persson Sjödin, E. (2020). Evaluation of vertical movement asymmetries in riding horses: relevance to equine orthopaedics. (Doctoral Dissertation). Swedish University of Agricultural Sciences. Retrieved from https://pub.epsilon.slu.se/16718/
Chicago Manual of Style (16th Edition):
Persson Sjödin, Emma. “Evaluation of vertical movement asymmetries in riding horses: relevance to equine orthopaedics.” 2020. Doctoral Dissertation, Swedish University of Agricultural Sciences. Accessed April 17, 2021.
https://pub.epsilon.slu.se/16718/.
MLA Handbook (7th Edition):
Persson Sjödin, Emma. “Evaluation of vertical movement asymmetries in riding horses: relevance to equine orthopaedics.” 2020. Web. 17 Apr 2021.
Vancouver:
Persson Sjödin E. Evaluation of vertical movement asymmetries in riding horses: relevance to equine orthopaedics. [Internet] [Doctoral dissertation]. Swedish University of Agricultural Sciences; 2020. [cited 2021 Apr 17].
Available from: https://pub.epsilon.slu.se/16718/.
Council of Science Editors:
Persson Sjödin E. Evaluation of vertical movement asymmetries in riding horses: relevance to equine orthopaedics. [Doctoral Dissertation]. Swedish University of Agricultural Sciences; 2020. Available from: https://pub.epsilon.slu.se/16718/

University of Kentucky
15.
Johnson, Alexa.
CONNECTING THE PIECES: HOW LOW BACK PAIN ALTERS LOWER EXTREMITY BIOMECHANICS AND SHOCK ATTENUATION IN ACTIVE INDIVIDUALS.
Degree: 2019, University of Kentucky
URL: https://uknowledge.uky.edu/rehabsci_etds/58
► Low back pain in collegiate athletes has been reported at a rate of 37% from a wide array of sports including soccer, volleyball, football, swimming,…
(more)
▼ Low back pain in collegiate athletes has been reported at a rate of 37% from a wide array of sports including soccer, volleyball, football, swimming, and baseball. Whereas, in a military population the prevalence of low back pain is 70% higher than the general population. Compensatory movement strategies are often used as an attempt to reduce pain. Though compensatory movement strategies may effectively reduce pain, they are often associated with altered lower extremity loading patterns. Those who suffer from chronic low back pain tend to walk and run slower and with less trunk and pelvis coordination and variability. Individuals with low back pain also tend to run with more stiffness in their knees. Moving with less joint coordination and more stiffness are potential compensatory movement patterns acting as a guarding mechanism for pain.
Overall the purpose of this project was to determine how chronic low back pain influences lower extremity biomechanics and shock attenuation in active individuals compared to healthy individuals and examine how the altered lower extremity biomechanics are related to clinical outcome measures. We hypothesized that individuals who present with chronic low back pain are more likely to exhibit higher vertical ground reaction forces and less knee flexion excursion during landing, compared to healthy individuals. We also hypothesized that individuals with chronic low back pain will have a reduced ability to attenuate shock during landing compared to the healthy individuals.
This study was a case control design in which physically active individuals suffering from chronic low back pain were matched to healthy controls. All participants reported for one testing session to assess self-perceived knee function in the form of the Knee Osteoarthritis Outcomes Score (KOOS), lower extremity strength and mechanics during three landing tasks. Isometric strength was assessed using an isokinetic dynamometer during hip abduction, hip extension, and knee extension. The landing tasks included a drop vertical jump, a single leg hop, and a crossover hop. A three-dimensional motion analysis system with two in-ground force plates and four inertial measurement units were used to assess lower extremity mechanics during the landing tasks.
Individuals with low back pain presented with reduced KOOS scores compared to healthy individuals in four of the five subscales, including Symptoms (p=0.007), Pain (p=0.002), Activities of Daily Living (p=0.021), and Quality of Life (p=0.003). Alternatively, while there were some strength, kinematic, and kinetic between limb asymmetries noted in the low back pain group, there were not between group differences with the healthy individuals. In the low back pain group, individuals presented with greater dominant limb knee extension strength (p=0.039) and greater dominant limb ankle plantarflexion at initial contact during the drop vertical jump, compared to the non-dominant limb (p=0.022). Individuals with low back pain also presented with greater non-dominant limb tibia impact…
Subjects/Keywords: Low Back Pain; Biomechanics; Active; Lower Extremity; Inertial Measurement Units; Biomechanics and Biotransport; Kinesiotherapy; Physical Therapy; Sports Medicine; Sports Sciences
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Johnson, A. (2019). CONNECTING THE PIECES: HOW LOW BACK PAIN ALTERS LOWER EXTREMITY BIOMECHANICS AND SHOCK ATTENUATION IN ACTIVE INDIVIDUALS. (Doctoral Dissertation). University of Kentucky. Retrieved from https://uknowledge.uky.edu/rehabsci_etds/58
Chicago Manual of Style (16th Edition):
Johnson, Alexa. “CONNECTING THE PIECES: HOW LOW BACK PAIN ALTERS LOWER EXTREMITY BIOMECHANICS AND SHOCK ATTENUATION IN ACTIVE INDIVIDUALS.” 2019. Doctoral Dissertation, University of Kentucky. Accessed April 17, 2021.
https://uknowledge.uky.edu/rehabsci_etds/58.
MLA Handbook (7th Edition):
Johnson, Alexa. “CONNECTING THE PIECES: HOW LOW BACK PAIN ALTERS LOWER EXTREMITY BIOMECHANICS AND SHOCK ATTENUATION IN ACTIVE INDIVIDUALS.” 2019. Web. 17 Apr 2021.
Vancouver:
Johnson A. CONNECTING THE PIECES: HOW LOW BACK PAIN ALTERS LOWER EXTREMITY BIOMECHANICS AND SHOCK ATTENUATION IN ACTIVE INDIVIDUALS. [Internet] [Doctoral dissertation]. University of Kentucky; 2019. [cited 2021 Apr 17].
Available from: https://uknowledge.uky.edu/rehabsci_etds/58.
Council of Science Editors:
Johnson A. CONNECTING THE PIECES: HOW LOW BACK PAIN ALTERS LOWER EXTREMITY BIOMECHANICS AND SHOCK ATTENUATION IN ACTIVE INDIVIDUALS. [Doctoral Dissertation]. University of Kentucky; 2019. Available from: https://uknowledge.uky.edu/rehabsci_etds/58

Virginia Tech
16.
Simmons, Jacob Ross.
A self-contained motion capture platform for e-textiles.
Degree: MS, Electrical and Computer Engineering, 2010, Virginia Tech
URL: http://hdl.handle.net/10919/34772
► Wearable computers and e-textiles are increasingly prevalent in todayâ s society. Motion capture is one of many potential applications for on-body electronic systems. Self-contained motion…
(more)
▼ Wearable computers and e-textiles are increasingly prevalent in todayâ s society. Motion capture is one of many potential applications for on-body electronic systems. Self-contained motion capture applications require information from sensors distributed throughout the body on a â smartâ garment. Therefore, this thesis presents the design of a flexible hardware platform for e-textile motion capture applications. This thesis also presents software for one such application, namely, tracking the pose or relative position of body limbs. The accuracy of this solution is compared to an industrial optical motion capture system. The combined hardware and software design are successful at collecting and processing motion capture data in the context of an e-textile jumpsuit.
Advisors/Committee Members: Athanas, Peter M. (committee member), Martin, Thomas L. (committeecochair), Jones, Mark T. (committeecochair).
Subjects/Keywords: inertial measurement units; wearable computing; e-textiles
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Simmons, J. R. (2010). A self-contained motion capture platform for e-textiles. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/34772
Chicago Manual of Style (16th Edition):
Simmons, Jacob Ross. “A self-contained motion capture platform for e-textiles.” 2010. Masters Thesis, Virginia Tech. Accessed April 17, 2021.
http://hdl.handle.net/10919/34772.
MLA Handbook (7th Edition):
Simmons, Jacob Ross. “A self-contained motion capture platform for e-textiles.” 2010. Web. 17 Apr 2021.
Vancouver:
Simmons JR. A self-contained motion capture platform for e-textiles. [Internet] [Masters thesis]. Virginia Tech; 2010. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10919/34772.
Council of Science Editors:
Simmons JR. A self-contained motion capture platform for e-textiles. [Masters Thesis]. Virginia Tech; 2010. Available from: http://hdl.handle.net/10919/34772

Brno University of Technology
17.
Chotaš, Kryštof.
Polohový a kursový referenční systém: Attitude and Heading Reference System.
Degree: 2019, Brno University of Technology
URL: http://hdl.handle.net/11012/30909
► This thesis deals with inertial navigation systems issues. It describes basics of reference frames, coordinate systems and matrix calculations for AHRS. There are also basic…
(more)
▼ This thesis deals with
inertial navigation systems issues. It describes basics of reference frames, coordinate systems and matrix calculations for AHRS. There are also basic information about
inertial sensors,
inertial measurements
units and its mistakes. One of the purposes of this paper could be explanation of
inertial navigation systems terms. The main object of this thesis is to explore the influence of using multiple sensors of same type to enhance measurements of AHRS systems.
Advisors/Committee Members: Klusáček, Stanislav (advisor), International, - Honeywell (referee).
Subjects/Keywords: Inerciální navigační systémy; vztažné soustavy; souřadnicové systémy; gyroskopy; akcelerometry; inerciální měřicí jednotky; potlačení šumu; Inertial navigation systems; reference frames; coordinate systems; gyroscopes; accelerometers; inertial measurement units; noise suppression
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chotaš, K. (2019). Polohový a kursový referenční systém: Attitude and Heading Reference System. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/30909
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Chotaš, Kryštof. “Polohový a kursový referenční systém: Attitude and Heading Reference System.” 2019. Thesis, Brno University of Technology. Accessed April 17, 2021.
http://hdl.handle.net/11012/30909.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Chotaš, Kryštof. “Polohový a kursový referenční systém: Attitude and Heading Reference System.” 2019. Web. 17 Apr 2021.
Vancouver:
Chotaš K. Polohový a kursový referenční systém: Attitude and Heading Reference System. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/11012/30909.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Chotaš K. Polohový a kursový referenční systém: Attitude and Heading Reference System. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/30909
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Edith Cowan University
18.
Balloch, Aaron.
Development, assessment and application of a novel algorithm to automatically detect change of direction movement and quantify its associated mechanical load in elite Australian Football.
Degree: 2020, Edith Cowan University
URL: https://ro.ecu.edu.au/theses/2305
► The ability to change direction rapidly and efficiently is critical to team-sport performance, including Australian football (AF), where a player’s capacity to rapidly decelerate, move…
(more)
▼ The ability to change direction rapidly and efficiently is critical to team-sport performance, including Australian football (AF), where a player’s capacity to rapidly decelerate, move laterally and re-accelerate is critical when evading opponents, tackling, or reacting to the unpredictable bounce of the ball or movement of another player. The biomechanical loading requirements of change of direction (COD) movement are angle and velocity dependant. Cumulative COD movement can impart high levels of neuromuscular and metabolic fatigue which can adversely affect the efficiency of subsequent movement efforts. Despite widespread use of microtechnology devices (the vast majority containing a global navigation satellite system receiver and inertial sensors) in elite level team-sport, a valid solution to automatically detect COD events and quantify the associated biomechanical load of these movements on-field remains absent. This project served to develop an algorithm that can automatically detect COD events, quantify the angle of the COD event and quantify the associated biomechanical load of each COD event. Study 1 and 2 were primarily focused on assessing the validity and reliability of the detection and angle quantification portions of the algorithm in both structured (Study 1) and unstructured (Study 2) movement environments, whilst Study 3 introduced a COD biomechanical load quantification technique to profile the COD demands of match play and a variety of match simulation training drills, provide comparisons between playing positions, and assess any similarities or differences with existing proprietary locomotive metrics. Whilst both COD event detection and angle quantification were highly accurate in a structured environment (Study 1), the accuracy of the angle quantification was severely reduced during unstructured, match-simulation training (Study 2). Utilising the event detection and biomechanical load quantification portions of the algorithm together, without angle quantification, the COD demands of match play were significantly lower than three different training drill types when expressed relative to time, whilst several positional differences were also present in COD demands across an entire season (Study 3).
Study one assessed the validity and reliability of a novel algorithm to automatically detect and calculate COD angle for pre-determined COD events ranging from 45° to 180° in both left and right directions. Five recreationally active males ran five consecutive predetermined COD trials each, at four different angles (45°, 90°, 135° and 180°) in each direction wearing a commercially available microtechnology unit (Optimeye S5, Catapult Innovations). Raw inertial sensor data were extracted, processed using our novel algorithm to calculate COD angle, and compared against a high-speed video (remotely piloted, position-locked drone aircraft) criterion measure. Concurrent validity was present for the following angles; (Left: 135°= 136.3 ± 2.1° and Right: 45°= 46.3 ± 1.6°; 135°= 133.4 ± 2.0°; 180°= 179.2 ± 5.9°)…
Subjects/Keywords: Wearable Technology; Inertial Measurement Units; Change of Direction; Load Management; Strength and Conditioning; Injury Prevention; Australian Rules Football; Sports Sciences; Sports Studies
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Balloch, A. (2020). Development, assessment and application of a novel algorithm to automatically detect change of direction movement and quantify its associated mechanical load in elite Australian Football. (Thesis). Edith Cowan University. Retrieved from https://ro.ecu.edu.au/theses/2305
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Balloch, Aaron. “Development, assessment and application of a novel algorithm to automatically detect change of direction movement and quantify its associated mechanical load in elite Australian Football.” 2020. Thesis, Edith Cowan University. Accessed April 17, 2021.
https://ro.ecu.edu.au/theses/2305.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Balloch, Aaron. “Development, assessment and application of a novel algorithm to automatically detect change of direction movement and quantify its associated mechanical load in elite Australian Football.” 2020. Web. 17 Apr 2021.
Vancouver:
Balloch A. Development, assessment and application of a novel algorithm to automatically detect change of direction movement and quantify its associated mechanical load in elite Australian Football. [Internet] [Thesis]. Edith Cowan University; 2020. [cited 2021 Apr 17].
Available from: https://ro.ecu.edu.au/theses/2305.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Balloch A. Development, assessment and application of a novel algorithm to automatically detect change of direction movement and quantify its associated mechanical load in elite Australian Football. [Thesis]. Edith Cowan University; 2020. Available from: https://ro.ecu.edu.au/theses/2305
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
19.
Beange, Kristen.
Validation of Wearable Sensor Performance and Placement for the Evaluation of Spine Movement Quality
.
Degree: 2019, University of Ottawa
URL: http://hdl.handle.net/10393/38698
► Inertial measurement units (IMUs) are being recognized as a portable and cost-effective alternative to motion analysis systems and have the potential to be introduced into…
(more)
▼ Inertial measurement units (IMUs) are being recognized as a portable and cost-effective alternative to motion analysis systems and have the potential to be introduced into clinical settings for the assessment of functional movement quality of the spine in patients with low back pain. However, uncertainties regarding sensor accuracy and reliability are limiting the widespread use and acceptance of IMU-based assessments into routine clinical practice. The objective of this work was to assess the performance of inexpensive wearable IMUs (Mbientlab MetaMotionR IMUs; Mbientlab Inc., San Francisco, USA; product specifications available in Appendix C) relative to conventional optical motion capture equipment (Vicon Motion Systems Ltd., Oxford, UK) in: 1) a controlled environment, and 2) an uncontrolled environment.
The first study evaluated the performance of 2 IMUs in a controlled environment during simulated repetitive spine motion carried out by means of a motorized gimbal. Root mean square error (RMSE) and mean absolute measurement differences between cycle-to-cycle minimum, maximum, and range of motion values, as well as correlational analyses within IMUs and between IMUs and Vicon, in all movement directions (i.e., simulated flexion-extension (FE), lateral bending (LB), and axial twisting (AT)), were compared. Measurement error was low in all axes during all tests (i.e., ≤ 1.54°); however, low-to-moderate correlational results were found in one non-primary axis, and this axis changed depending on the direction of the movement (i.e., LB during FE-motion (0.244 ≤ R ≤ 0.515), AT during LB-motion (0.594 ≤ R ≤ 0.795), and FE during AT-motion (0.002 ≤ R ≤ 0.255)).
The second study was designed to assess the performance of the IMUs in an uncontrolled environment during repetitive spine FE in human participants. Absolute angles and local dynamic stability were compared for individual IMUs (which were placed over T10-T12 spinous processes, and the pelvis) as well as for relative motion between IMUs. Maximum finite-time Lyapunov exponents (λmax) were used to quantify local dynamic stability and were calculated using both FE and the sum of squares (SS) from measured spine kinematics. It was found that the IMUs have acceptable performance in all axes when tracking motion (RMSE ≤ 2.43°); however, low-to-moderate correlational results were found in one non-primary axis (0.987 ≤ RFE ≤ 0.998; 0.746 ≤ RLB ≤ 0.978; 0.343 ≤ RAT ≤ 0.679). In addition, correlations between λmax estimates were high; therefore, local dynamic stability can be accurately estimated using both FE and SS data (0.807 ≤ 〖ICC〗_2,1^FE ≤ 0.919; 0.738 ≤ 〖ICC〗_2,1^SS ≤ 0.868). Correlation between λmax estimates was higher when using FE data for individual sensors/rigid-body marker clusters; however, correlation was higher when using SS data for relative motion.
In general, the results of these studies show that the MetaMotionR IMUs have acceptable performance in all axes when considering absolute angle orientation and motion tracking, and measurement of local…
Subjects/Keywords: Spine movement quality;
Inertial measurement units;
Wearables;
Local dynamic stability
…MetaMotionR inertial
measurement units (IMUs) and Vicon rigid body marker clusters. (… …inertial measurement units (IMUs)/rigid-body marker clusters (Chapter 5)… …inertial measurement units (IMUs)/rigid-body marker clusters (Chapter 5)… …Figure C.1. Mechanical specifications for Mbientlab MetaMotionR inertial measurement units… …Ashouri et al., 2017). More specifically, inertial measurement
units (IMUs) are…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Beange, K. (2019). Validation of Wearable Sensor Performance and Placement for the Evaluation of Spine Movement Quality
. (Thesis). University of Ottawa. Retrieved from http://hdl.handle.net/10393/38698
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Beange, Kristen. “Validation of Wearable Sensor Performance and Placement for the Evaluation of Spine Movement Quality
.” 2019. Thesis, University of Ottawa. Accessed April 17, 2021.
http://hdl.handle.net/10393/38698.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Beange, Kristen. “Validation of Wearable Sensor Performance and Placement for the Evaluation of Spine Movement Quality
.” 2019. Web. 17 Apr 2021.
Vancouver:
Beange K. Validation of Wearable Sensor Performance and Placement for the Evaluation of Spine Movement Quality
. [Internet] [Thesis]. University of Ottawa; 2019. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10393/38698.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Beange K. Validation of Wearable Sensor Performance and Placement for the Evaluation of Spine Movement Quality
. [Thesis]. University of Ottawa; 2019. Available from: http://hdl.handle.net/10393/38698
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
20.
Barrois, Rémi.
Gait quantitative phenotyping of brain-injured subjects : gait measurement in the doctor’s office using inertial measurement units : Phénotypage quantitatif de la marche du patient cérébrolésé : mesure de la marche en consultation de routine avec des capteurs inertiels.
Degree: Docteur es, Neurosciences, 2018, Sorbonne Paris Cité
URL: http://www.theses.fr/2018USPCB008
► Si les neurosciences connaissent d’importants progrès dans l’imagerie et le génotypage, le phénotypage repose encore largement sur des échelles visuelles. Le phénotype chez l’homme repose…
(more)
▼ Si les neurosciences connaissent d’importants progrès dans l’imagerie et le génotypage, le phénotypage repose encore largement sur des échelles visuelles. Le phénotype chez l’homme repose principalement sur son style perceptivo-moteur qui donne une empreinte à la marche, la posture, l’équilibre, l’habilité des membres supérieurs, les mouvements oculaires etc. La marche, fonction complexe et fondamentale de l’être humain, implique l’ensemble du système musculo-squelettique, le système nerveux central et périphérique ainsi que les organes sensoriels. Elle est le produit d’un patron de marche automatique et inconscient modulé par le tronc cérébral, les noyaux gris centraux et par des retours sensitifs (visuels, proprioceptives, vestibulaires et épicritiques). Enfin, la marche est aussi sous contrôle volontaire. Le phénotypage quantitatif de la marche suppose la construction préalable de bases de données de signaux de marche d’un nombre élevé (centaines) de sujets et de patients. Ceci peut être mené à bien grâce à des outils de mesure simples d’utilisation et adaptés à la pratique médicale de routine. Il existe plusieurs moyens pour phénotyper la marche mais le capteur inertiel, en raison de son prix, de sa souplesse d’utilisation et de l’accès aux données brutes est un outil particulièrement adapté pour l’étude de la marche en consultation de routine. Les capteurs inertiels permettent le calcul de nombreux paramètres. L’exercice de marche de 10 m aller/retour à vitesse de confort départ arrêté donne accès aux différentes phases de la marche (initiation, croisière, demi-tour) dans des conditions de consultation de routine. Ainsi, l’objectif de ce travail est d’approcher les mécanismes d’adaptation des personnes à des perturbations à différents niveaux anatomiques des structures impliquées dans la marche. Nous abordons cette question par un phénotypage quantitatif à partir du signal de capteurs inertiels recueilli sur des patients au cours d’un exercice de marche de 10 m aller/retour en consultation clinique de routine. Nous avons étudié successivement la marche de patients atteints d’arthrose du membre inférieur comme modèle d’adaptation de la marche à la douleur, puis la marche dans la maladie de Parkinson comme modèle d’atteinte du système de la mise en place des procédures motrices, enfin, la locomotion des patients hémiparétiques à la suite d’un accident vasculaire cérébral hémisphérique comme modèle d’atteinte de la commande volontaire. Nous montrons que la douleur dans l’arthrose du membre inférieur mène à une rigidification globale de la cinématique corporelle. Cette rigidification est prépondérante sur le membre atteint. Elle traduit la perte des synergies musculaires par la mise en place de boucle-réflexe anti-douleur. Nous démontrons que ces modifications sont corrélées à la sévérité clinique de l’arthrose. Pour analyser la régularité de la marche dans la maladie de Parkinson indépendamment des variabilités inter-individuelles du patron de marche nous avons développé un outil de visualisation de l’exercice de…
Advisors/Committee Members: Vidal, Pierre Paul (thesis director), Ricard, Damien (thesis director).
Subjects/Keywords: Capteur inertiel; Marche; Demi-tour; Locomotion; Accident vasculaire cérébral; Maladie de Parkinson; Arthrose du membre inférieur; Inertial measurement units; 180° turn; Locomotion; Stroke; Parkinson’s disease; Lower limb osteoarthritis; 617.48
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Barrois, R. (2018). Gait quantitative phenotyping of brain-injured subjects : gait measurement in the doctor’s office using inertial measurement units : Phénotypage quantitatif de la marche du patient cérébrolésé : mesure de la marche en consultation de routine avec des capteurs inertiels. (Doctoral Dissertation). Sorbonne Paris Cité. Retrieved from http://www.theses.fr/2018USPCB008
Chicago Manual of Style (16th Edition):
Barrois, Rémi. “Gait quantitative phenotyping of brain-injured subjects : gait measurement in the doctor’s office using inertial measurement units : Phénotypage quantitatif de la marche du patient cérébrolésé : mesure de la marche en consultation de routine avec des capteurs inertiels.” 2018. Doctoral Dissertation, Sorbonne Paris Cité. Accessed April 17, 2021.
http://www.theses.fr/2018USPCB008.
MLA Handbook (7th Edition):
Barrois, Rémi. “Gait quantitative phenotyping of brain-injured subjects : gait measurement in the doctor’s office using inertial measurement units : Phénotypage quantitatif de la marche du patient cérébrolésé : mesure de la marche en consultation de routine avec des capteurs inertiels.” 2018. Web. 17 Apr 2021.
Vancouver:
Barrois R. Gait quantitative phenotyping of brain-injured subjects : gait measurement in the doctor’s office using inertial measurement units : Phénotypage quantitatif de la marche du patient cérébrolésé : mesure de la marche en consultation de routine avec des capteurs inertiels. [Internet] [Doctoral dissertation]. Sorbonne Paris Cité; 2018. [cited 2021 Apr 17].
Available from: http://www.theses.fr/2018USPCB008.
Council of Science Editors:
Barrois R. Gait quantitative phenotyping of brain-injured subjects : gait measurement in the doctor’s office using inertial measurement units : Phénotypage quantitatif de la marche du patient cérébrolésé : mesure de la marche en consultation de routine avec des capteurs inertiels. [Doctoral Dissertation]. Sorbonne Paris Cité; 2018. Available from: http://www.theses.fr/2018USPCB008
21.
RONALD BOYD ANDERSON.
AUTOMATIC AND COMPREHENSIVE GAIT MEASUREMENT AND ANALYSIS.
Degree: 2019, National University of Singapore
URL: https://scholarbank.nus.edu.sg/handle/10635/163176
Subjects/Keywords: gait analysis; ultra wideband; inertial measurement units; sensor fusion; wearable sensors; ranging technologies
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APA ·
Chicago ·
MLA ·
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Export
to Zotero / EndNote / Reference
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APA (6th Edition):
ANDERSON, R. B. (2019). AUTOMATIC AND COMPREHENSIVE GAIT MEASUREMENT AND ANALYSIS. (Thesis). National University of Singapore. Retrieved from https://scholarbank.nus.edu.sg/handle/10635/163176
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
ANDERSON, RONALD BOYD. “AUTOMATIC AND COMPREHENSIVE GAIT MEASUREMENT AND ANALYSIS.” 2019. Thesis, National University of Singapore. Accessed April 17, 2021.
https://scholarbank.nus.edu.sg/handle/10635/163176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
ANDERSON, RONALD BOYD. “AUTOMATIC AND COMPREHENSIVE GAIT MEASUREMENT AND ANALYSIS.” 2019. Web. 17 Apr 2021.
Vancouver:
ANDERSON RB. AUTOMATIC AND COMPREHENSIVE GAIT MEASUREMENT AND ANALYSIS. [Internet] [Thesis]. National University of Singapore; 2019. [cited 2021 Apr 17].
Available from: https://scholarbank.nus.edu.sg/handle/10635/163176.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
ANDERSON RB. AUTOMATIC AND COMPREHENSIVE GAIT MEASUREMENT AND ANALYSIS. [Thesis]. National University of Singapore; 2019. Available from: https://scholarbank.nus.edu.sg/handle/10635/163176
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
22.
Nouredanesh, Mina.
Machine Learning-based Detection of Compensatory Balance Responses and Environmental Fall Risks Using Wearable Sensors.
Degree: 2016, University of Waterloo
URL: http://hdl.handle.net/10012/10746
► Falls are the leading cause of fatal and non-fatal injuries among seniors worldwide, with serious and costly consequences. Compensatory balance responses (CBRs) are reactions to…
(more)
▼ Falls are the leading cause of fatal and non-fatal injuries among seniors worldwide, with serious and costly consequences. Compensatory balance responses (CBRs) are reactions to recover stability following a loss of balance, potentially resulting in a fall if sufficient recovery mechanisms are not activated. While performance of CBRs are demonstrated risk factors for falls in seniors, the frequency, type, and underlying cause of these incidents occurring in everyday life have not been well investigated.
This study was spawned from the lack of research on development of fall risk assessment methods that can be used for continuous and long-term mobility monitoring of the geri- atric population, during activities of daily living, and in their dwellings. Wearable sensor systems (WSS) offer a promising approach for continuous real-time detection of gait and balance behavior to assess the risk of falling during activities of daily living. To detect CBRs, we record movement signals (e.g. acceleration) and activity patterns of four muscles involving in maintaining balance using wearable inertial measurement units (IMUs) and surface electromyography (sEMG) sensors. To develop more robust detection methods, we investigate machine learning approaches (e.g., support vector machines, neural networks) and successfully detect lateral CBRs, during normal gait with accuracies of 92.4% and 98.1% using sEMG and IMU signals, respectively.
Moreover, to detect environmental fall-related hazards that are associated with CBRs, and affect balance control behavior of seniors, we employ an egocentric mobile vision system mounted on participants chest. Two algorithms (e.g. Gabor Barcodes and Convolutional Neural Networks) are developed. Our vision-based method detects 17 different classes of environmental risk factors (e.g., stairs, ramps, curbs) with 88.5% accuracy. To the best of the authors knowledge, this study is the first to develop and evaluate an automated vision-based method for fall hazard detection.
Subjects/Keywords: Wearable sensors; Machine learning; Computer vison; Image processing; Compensatory balance reactions; Fall risk assessment; Electromyography; Inertial measurement units; Pattern recognition; Fall prediction and prevention
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Nouredanesh, M. (2016). Machine Learning-based Detection of Compensatory Balance Responses and Environmental Fall Risks Using Wearable Sensors. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/10746
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Nouredanesh, Mina. “Machine Learning-based Detection of Compensatory Balance Responses and Environmental Fall Risks Using Wearable Sensors.” 2016. Thesis, University of Waterloo. Accessed April 17, 2021.
http://hdl.handle.net/10012/10746.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Nouredanesh, Mina. “Machine Learning-based Detection of Compensatory Balance Responses and Environmental Fall Risks Using Wearable Sensors.” 2016. Web. 17 Apr 2021.
Vancouver:
Nouredanesh M. Machine Learning-based Detection of Compensatory Balance Responses and Environmental Fall Risks Using Wearable Sensors. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10012/10746.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Nouredanesh M. Machine Learning-based Detection of Compensatory Balance Responses and Environmental Fall Risks Using Wearable Sensors. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/10746
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Waterloo
23.
Laschowski, Brock.
Biomechanical Modelling of Paralympic Wheelchair Curling.
Degree: 2016, University of Waterloo
URL: http://hdl.handle.net/10012/10722
► This research represents the first documented investigation into the biomechanics and neural motor control of Paralympic wheelchair curling. A multibody biomechanical model of the wheelchair…
(more)
▼ This research represents the first documented investigation into the biomechanics and neural motor control of Paralympic wheelchair curling. A multibody biomechanical model of the wheelchair curling delivery was developed in reference to a Team Canada Paralympic athlete with a spinal cord injury. Subject-specific body segment parameters were quantified via dual-energy x-ray absorptiometry. The angular joint kinematics throughout the wheelchair curling delivery were experimentally measured using an inertial measurement unit system; the translational kinematics of the curling stone were additionally evaluated with optical motion capture. The experimental kinematics were optimized to satisfy the kinematic constraints of the multibody biomechanical model. The optimized kinematics were subsequently used to compute the resultant joint moments through inverse dynamics analysis. The neural motor control of the Paralympic athlete was modeled using forward dynamic optimization. The predicted kinematics from different optimization objective functions were compared with those experimentally measured throughout the wheelchair curling delivery. Of the optimization objective functions under consideration, minimizing angular joint accelerations resulted in the most accurate predictions of the kinematic trajectories and the shortest optimization computation time. The implications of these findings are discussed in relation to musculoskeletal modeling and optimal equipment design through predictive simulation.
Subjects/Keywords: Body Segment Parameters; Dual-Energy X-Ray Absorptiometry; Inertial Measurement Units; Optical Motion Capture; Kinematic Constraints; Inverse Dynamics Analysis; Neural Motor Control; Forward Dynamic Optimization; Paralympic Sport
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Laschowski, B. (2016). Biomechanical Modelling of Paralympic Wheelchair Curling. (Thesis). University of Waterloo. Retrieved from http://hdl.handle.net/10012/10722
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Laschowski, Brock. “Biomechanical Modelling of Paralympic Wheelchair Curling.” 2016. Thesis, University of Waterloo. Accessed April 17, 2021.
http://hdl.handle.net/10012/10722.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Laschowski, Brock. “Biomechanical Modelling of Paralympic Wheelchair Curling.” 2016. Web. 17 Apr 2021.
Vancouver:
Laschowski B. Biomechanical Modelling of Paralympic Wheelchair Curling. [Internet] [Thesis]. University of Waterloo; 2016. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/10012/10722.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Laschowski B. Biomechanical Modelling of Paralympic Wheelchair Curling. [Thesis]. University of Waterloo; 2016. Available from: http://hdl.handle.net/10012/10722
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cleveland State University
24.
Khademi, Gholamreza.
Design and Optimization of Locomotion Mode Recognition for
Lower-Limb Amputees with Prostheses.
Degree: PhD, Washkewicz College of Engineering, 2019, Cleveland State University
URL: http://rave.ohiolink.edu/etdc/view?acc_num=csu1568747409603973
► Lower-limb prostheses feature a high-level control system, referred to as locomotion mode recognition (LMR), which enables seamless human-prosthesis-environment interactions. This dissertation has five aims to…
(more)
▼ Lower-limb prostheses feature a high-level control
system, referred to as locomotion mode recognition (LMR), which
enables seamless human-prosthesis-environment interactions. This
dissertation has five aims to show the application of feature
selection (FS), optimization, and sensor fusion for the development
of optimal predictive LMR systems. Aim 1 is to develop a new hybrid
evolutionary algorithm (EA) with enhanced exploration and
exploitation abilities for optimizing the LMR design parameters.
Our hybrid EA features three new components, including feature
sharing among candidate solutions, local search via gradient
descent, and random mutation and re-initialization. Statistical
tests demonstrate the competitive performance of our method in
comparison to 12 other optimization algorithms. Aim 2 is to
investigate the application of an EA combined with filter and
wrapper FS methods for building accurate LMR for transfemoral
amputees while, at the same time, eliminating unneeded features.
Experimental gait data collected from the residual limb is used to
train various linear and nonlinear classifiers with optimally
selected time- and frequency-domain features. Aim 3 is to find an
optimal Pareto front, a set of equally preferable non-dominated
feature subsets, using multi-objective optimization (MOO) to trade
off between complexity and accuracy in LMR. We propose a new
gradient-based multi-objective embedded FS method by incorporating
an elastic net in multilayer perceptron (MLP) neural network
training. Our proposed method shows competitive performance
compared to four variants of EA-based MOOs on the basis of
normalized hypervolume and relative coverage. Aim 4 is to develop a
general sensor / feature optimization framework for LMR that
effectively eliminates not only irrelevant or redundant features
but also unneeded
measurement signals while still maintaining
performance. We apply the proposed framework for locomotion mode
prediction of several transfemoral individuals with a powered
knee-ankle prosthesis. We categorize misclassification based on
their impact on the user's walking stability and comfort. A deep
neural network trained with an optimal subset found by the
optimization framework results in 1.98% steady-state and 4.09%
transitional error rates, while only using approximately 41% and
53% of the available features and sensors, respectively. Aims 2-4
would potentially lead to less frequent clinical visits needed for
sensor replacement and calibration, which may save health care
costs and the prosthesis user's time and energy. Aim 5 is to
develop an ensembling LMR system with environmental awareness. We
incorporate the terrain conditions (e.g., level walking, stair
ascent, and stair descent) in the LMR design to provide valuable
subject-independent prior information about the upcoming locomotion
modes. We construct an efficient deep convolutional neural network
through transfer learning from RGB images captured during various
walking tasks. Predicted terrain is combined with mechanical data
to design an…
Advisors/Committee Members: Simon, Dan (Advisor).
Subjects/Keywords: Electrical Engineering; Optimization; Locomotion mode recognition; Powered Prosthesis; Multi-objective optimization; Convolutional neural networks; Inertial measurement units; Impedance control; Lower-limb amputees
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APA (6th Edition):
Khademi, G. (2019). Design and Optimization of Locomotion Mode Recognition for
Lower-Limb Amputees with Prostheses. (Doctoral Dissertation). Cleveland State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=csu1568747409603973
Chicago Manual of Style (16th Edition):
Khademi, Gholamreza. “Design and Optimization of Locomotion Mode Recognition for
Lower-Limb Amputees with Prostheses.” 2019. Doctoral Dissertation, Cleveland State University. Accessed April 17, 2021.
http://rave.ohiolink.edu/etdc/view?acc_num=csu1568747409603973.
MLA Handbook (7th Edition):
Khademi, Gholamreza. “Design and Optimization of Locomotion Mode Recognition for
Lower-Limb Amputees with Prostheses.” 2019. Web. 17 Apr 2021.
Vancouver:
Khademi G. Design and Optimization of Locomotion Mode Recognition for
Lower-Limb Amputees with Prostheses. [Internet] [Doctoral dissertation]. Cleveland State University; 2019. [cited 2021 Apr 17].
Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1568747409603973.
Council of Science Editors:
Khademi G. Design and Optimization of Locomotion Mode Recognition for
Lower-Limb Amputees with Prostheses. [Doctoral Dissertation]. Cleveland State University; 2019. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=csu1568747409603973

University of Michigan
25.
Fu, Qianyi.
Development of a Planar Piecewise Continuous Lumped Muscle Parameter Model for Investigation of Joint Stiffness in Walking on a Level Surface.
Degree: PhD, Industrial & Operations Engineering, 2020, University of Michigan
URL: http://hdl.handle.net/2027.42/163175
► When joint stiffnesses are affected by injuries or illnesses they can interfere with gait and with activities of daily living, work, and leisure. Biomechanical models…
(more)
▼ When joint stiffnesses are affected by injuries or illnesses they can interfere with gait and with activities of daily living, work, and leisure. Biomechanical models have been proposed for describing the effects of various conditions and interventions on the phases of gait.
This dissertation reports the development of a planar piecewise continuous lumped muscle parameter (PPCLMP) model for investigating how different joint stiffnesses affect the gait phases individually and collectively. The proposed PPCLMP model characterizes the movements of lower limbs during each gait phase by a simplified dynamic system: the single stance phase by an inverted pendulum, the double stance phase by a kinematic chain, and the swing phase by a double pendulum. The model uses lumped muscle parameters to characterize the joint torques during each phase. The phase continuity is achieved by setting the joint angles and angular velocities at the end of one phase equal to those at the start of the next phase. The model can predict gait movements from given initial conditions (initial joint angles and angular velocities), anthropometry, lumped muscle parameters, and joint stiffness in a forward-dynamic mode. Also, if the gait movements are known, the model could estimate the lumped muscle parameters in an inverse dynamic mode.
In the first study, the model was used in the forward-dynamic mode to predict joint angles and gait parameters for six healthy subjects’ anthropometry, ankle joint stiffnesses (without ankle-foot orthosis (AFO), with a low-stiffness AFO, and with a high-stiffness AFO), initial conditions, and constant lumped muscle parameters. Results showed that the trend of gait parameters changings (longer step length and shorter swing time on the AFO side for higher AFO stiffness) with different AFO stiffnesses were qualitatively well predicted by the model but quantitative prediction accuracy was limited (the mean errors were 0.15 m and 5% for the predicted step length and swing time, respectively) due to the constant values of lump muscle parameters.
The second study examined the use of the model in an inverse-dynamic mode using data from a single
inertial measurement unit (IMU) attached to the lower shank in order to estimate the initial conditions and lumped muscle parameters for each gait cycle. These were used by the model in the forward-dynamic mode to enhance the gait prediction. Results from two patients wearing AFOs demonstrated that the model prediction was markedly improved comparing with the first study by utilizing the inverse-dynamic mode as the mean RMSE was 0.07 m and 2% for predicted step length and swing time, respectively.
The third study investigated the PPCLMP model prediction accuracy using the inverse and forward dynamic processes proposed in the second study. Three male and three female healthy subjects were recruited to walk with IMU-instrumented AFOs on their left feet to measure step lengths and swing time, while surface electrodes measured selected muscle activities for comparison with lumped muscle…
Advisors/Committee Members: Armstrong, Thomas J (committee member), Shih, Albert J (committee member), Ashton-Miller, James A (committee member), Martin, Bernard J (committee member).
Subjects/Keywords: Biomechanical Modeling; Gait Analysis and Predictioin; Ankle-Foot Orthosis; Lumped Parameters; Forward and Inversed Dynamics; Inertial Measurement Units; Industrial and Operations Engineering; Engineering
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Fu, Q. (2020). Development of a Planar Piecewise Continuous Lumped Muscle Parameter Model for Investigation of Joint Stiffness in Walking on a Level Surface. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/163175
Chicago Manual of Style (16th Edition):
Fu, Qianyi. “Development of a Planar Piecewise Continuous Lumped Muscle Parameter Model for Investigation of Joint Stiffness in Walking on a Level Surface.” 2020. Doctoral Dissertation, University of Michigan. Accessed April 17, 2021.
http://hdl.handle.net/2027.42/163175.
MLA Handbook (7th Edition):
Fu, Qianyi. “Development of a Planar Piecewise Continuous Lumped Muscle Parameter Model for Investigation of Joint Stiffness in Walking on a Level Surface.” 2020. Web. 17 Apr 2021.
Vancouver:
Fu Q. Development of a Planar Piecewise Continuous Lumped Muscle Parameter Model for Investigation of Joint Stiffness in Walking on a Level Surface. [Internet] [Doctoral dissertation]. University of Michigan; 2020. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/2027.42/163175.
Council of Science Editors:
Fu Q. Development of a Planar Piecewise Continuous Lumped Muscle Parameter Model for Investigation of Joint Stiffness in Walking on a Level Surface. [Doctoral Dissertation]. University of Michigan; 2020. Available from: http://hdl.handle.net/2027.42/163175
26.
Gonzalez Espana, Juan Jose.
Location Estimation Through Inexact Machine Learning Approach.
Degree: MS, Engineering, 2018, Rice University
URL: http://hdl.handle.net/1911/105792
► Location estimation has become a field of increasing interest in recent years. The main reason is the multiple applications that can be enabled based on…
(more)
▼ Location estimation has become a field of increasing interest in recent years. The main reason is the multiple applications that can be enabled based on this technology. Fields such as entertainment, health care, tourism and advertisement are some of the areas where a plethora of applications can be implemented. In outdoors this problem is solved, for most of the cases, with Global Navigation Systems (GNSS). However, in indoors is a current topic of interest that has been addressed from different perspectives with different technologies. Nonetheless, there is no technology that is as established as GNSS is for outdoors. One promising approach is
Inertial Measurement Units (IMU) which are low cost and widely accessible in multiple SmartDevices such SmartPhones, SmartWatches, WristBands, among others. Two of the main difficulties that hinder the wide adoption of this technology are the error accumulation between estimations and the scarce availability of the Ground Truth data to train and test the models. In this work both challenges are addressed by two methods, one which corrects the error by using the structure of the map where the user is located and the other method improves the Ground Truth data provided by GNSS measurements. Energy consumption is reduced by a factor 27x when compared with GPS and the accuracy of the labels is improved by 26% on average.
Advisors/Committee Members: Palem, Krishna (advisor).
Subjects/Keywords: Location estimation; Inertial Measurement Units; Machine Learning; Inexactness
…third party [3].
Inertial Measurement Units (IMU) provides a solution… …on Inertial Measurement Units (IMU) suffers from two
main drawbacks: 1. Error… …2.2
Inertial Measurement Unit
The Inertial Measurement Units (IMUs) has taken… …ideas from Inexactness [6–9], Inertial Measurements
Units and Machine learning are…
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gonzalez Espana, J. J. (2018). Location Estimation Through Inexact Machine Learning Approach. (Masters Thesis). Rice University. Retrieved from http://hdl.handle.net/1911/105792
Chicago Manual of Style (16th Edition):
Gonzalez Espana, Juan Jose. “Location Estimation Through Inexact Machine Learning Approach.” 2018. Masters Thesis, Rice University. Accessed April 17, 2021.
http://hdl.handle.net/1911/105792.
MLA Handbook (7th Edition):
Gonzalez Espana, Juan Jose. “Location Estimation Through Inexact Machine Learning Approach.” 2018. Web. 17 Apr 2021.
Vancouver:
Gonzalez Espana JJ. Location Estimation Through Inexact Machine Learning Approach. [Internet] [Masters thesis]. Rice University; 2018. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/1911/105792.
Council of Science Editors:
Gonzalez Espana JJ. Location Estimation Through Inexact Machine Learning Approach. [Masters Thesis]. Rice University; 2018. Available from: http://hdl.handle.net/1911/105792
27.
Chen, Howard.
The effects of movement speeds and magnetic disturbance on inertial measurement unit accuracy: the implications of sensor fusion algorithms in occupational ergonomics applications.
Degree: PhD, Industrial Engineering, 2017, University of Iowa
URL: https://ir.uiowa.edu/etd/5437
► Accurate risk assessment tools and methods are necessary to understand the relationship between occupational exposure to physical risk factors and musculoskeletal disorders. Ergonomists typically…
(more)
▼ Accurate risk assessment tools and methods are necessary to understand the relationship between occupational exposure to physical risk factors and musculoskeletal disorders. Ergonomists typically consider direct
measurement methods to be the most objective and accurate of the available tools. However, direct
measurement methods are often not used due to cost, practicality, and worker/workplace disruption.
Inertial measurement units (IMUs), a relatively new direct
measurement technology used to assess worker kinematics, are attractive to ergonomists due to their small size, low cost, and ability to reliably capture information across full working shifts. IMUs are often touted as a field-capable alternative to optical motion capture systems (OMCs). The error magnitudes of IMUs, however, can vary significantly (>15°) both within and across studies. The overall goals of this thesis were to (i) provide knowledge about the capabilities and limitations of IMUs in order to explain the inconsistencies observed in previous studies that assessed IMU accuracy, and (ii) provide guidance for the ergonomics community to leverage this technology. All three studies in this dissertation systematically evaluated IMUs using a repetitive material transfer task performed by thirteen participants with varying movement speeds (15, 30, 45 cycles/minute) and magnetic disturbance (absent, present). An OMC system was used as the reference device. This first study systematically evaluated the effects of motion speed and magnetic disturbance on the spatial orientation accuracy of an
inertial measurement unit (IMU) worn on the hand. Root-mean-square differences (RMSD) exceeded 20° when inclination measurements (pitch and roll) were calculated using the IMU’s accelerometer. A linear Kalman filter and a proprietary, embedded Kalman filter reduced inclination RMSD to < 3° across all movement speeds. The RMSD in the heading direction (i.e., about gravity) increased (from < 5° to 17°) under magnetic disturbance. The linear Kalman filter and the embedded Kalman filter reduced heading RMSD to < 12° and < 7°, respectively. This study indicated that the use of IMUs and Kalman filters can improve inclinometer
measurement accuracy. However, magnetic disturbances continue to limit the accuracy of three-dimensional IMU motion capture. The goal of the second study was to understand the capability of IMU inclinometers to improve estimates of angular displacements and velocities of the upper arm. RMSD and peak displacement error exceeded 11° and 28° at the fastest transfer rate (45 cycles/min) when upper arm elevation was calculated using the IMU accelerometer. The implementation of a Kalman filter reduced RMS and peak errors to < 1.5° and < 2.3°, respectively. Similarly, the RMS and peak error for accelerometer-derived velocities exceeded 81°/s and 221.3°/s, respectively, at the fastest transfer rate. The Kalman filter reduced RMS and peak errors to < 9.2°/s and < 25.1°/s, respectively. The third study was conducted to evaluate…
Advisors/Committee Members: Fethke, Nathan B. (supervisor).
Subjects/Keywords: Biomechanics; Ergonomics; Inertial Measurement Units; Inertial Motion Capture; Motion Capture; Occupational Ergonomics; Industrial Engineering
…limited. Inertial measurement units (IMUs), a relatively new
technology available for… …6
1.2.5 Inertial Measurement Units… …inertial measurement units (IMUs) are inexpensive (<$5),
generic sensors… …2014). Inertial measurement
units (IMUs) overcome these limitations, in theory… …through the addition of gyroscopes and magnetometers.
1.2.5 Inertial Measurement Units
Inertial…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Chen, H. (2017). The effects of movement speeds and magnetic disturbance on inertial measurement unit accuracy: the implications of sensor fusion algorithms in occupational ergonomics applications. (Doctoral Dissertation). University of Iowa. Retrieved from https://ir.uiowa.edu/etd/5437
Chicago Manual of Style (16th Edition):
Chen, Howard. “The effects of movement speeds and magnetic disturbance on inertial measurement unit accuracy: the implications of sensor fusion algorithms in occupational ergonomics applications.” 2017. Doctoral Dissertation, University of Iowa. Accessed April 17, 2021.
https://ir.uiowa.edu/etd/5437.
MLA Handbook (7th Edition):
Chen, Howard. “The effects of movement speeds and magnetic disturbance on inertial measurement unit accuracy: the implications of sensor fusion algorithms in occupational ergonomics applications.” 2017. Web. 17 Apr 2021.
Vancouver:
Chen H. The effects of movement speeds and magnetic disturbance on inertial measurement unit accuracy: the implications of sensor fusion algorithms in occupational ergonomics applications. [Internet] [Doctoral dissertation]. University of Iowa; 2017. [cited 2021 Apr 17].
Available from: https://ir.uiowa.edu/etd/5437.
Council of Science Editors:
Chen H. The effects of movement speeds and magnetic disturbance on inertial measurement unit accuracy: the implications of sensor fusion algorithms in occupational ergonomics applications. [Doctoral Dissertation]. University of Iowa; 2017. Available from: https://ir.uiowa.edu/etd/5437

University of Illinois – Urbana-Champaign
28.
Gowda, Mahanth Krishnappa.
Motion tracking problems in Internet of Things (IoT) and wireless networking.
Degree: PhD, Computer Science, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/99369
► The dissertation focuses on inferring various motion patterns of internet-of-things (IoT) devices, by leveraging inertial sensors embedded in these objects, as well as wireless signals…
(more)
▼ The dissertation focuses on inferring various motion patterns of internet-of-things (IoT) devices, by leveraging
inertial sensors embedded in these objects, as well as wireless signals emitted (or reflected) from them. For instance, we use a combination of GPS signals and
inertial sensors on drones to precisely track its 3D orientation over time, ultimately improving safety against failures and crashes. In another application in sports analytics, we embed sensors and radios inside baseballs and cricket balls and compute their 3D trajectory and spin patterns, even when they move at extremely high speeds. In a third application for wireless networks, we explore the possibility of physically moving wireless infrastructure like Access Points and basestations on robots and drones for enhancing the network performance. While these are diverse applications in drones, sports analytics, and wireless networks, the common theme underlying the research is in the development of the core motion-related building blocks. Specifically, we emphasize the philosophy of "fusion of multi modal sensor data with application specific model” as the design principle for building the next generation of diverse IoT applications. To this end, we draw on theoretical techniques in wireless communication, signal processing, and statistics, but translate them to completely functional systems on real-world platforms.
Advisors/Committee Members: Roy Choudhury, Romit (advisor), Roy Choudhury, Romit (Committee Chair), Maggs, Bruce (committee member), Vaidya, Nitin (committee member), Nahrstedt, Klara (committee member), Abdelzaher, Tarek (committee member).
Subjects/Keywords: Differential Global Positioning System (GPS); Carrier phases; Unmanned aerial vehicle (UAV); Drones; Inertial measurement units (IMU); Wireless; Robotic networks; Infrastructure; Measurement; Wearables; Analytics; Ultra-wideband (UWB); Sports; Internet of Things (IoT); Embedded sensing
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gowda, M. K. (2017). Motion tracking problems in Internet of Things (IoT) and wireless networking. (Doctoral Dissertation). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99369
Chicago Manual of Style (16th Edition):
Gowda, Mahanth Krishnappa. “Motion tracking problems in Internet of Things (IoT) and wireless networking.” 2017. Doctoral Dissertation, University of Illinois – Urbana-Champaign. Accessed April 17, 2021.
http://hdl.handle.net/2142/99369.
MLA Handbook (7th Edition):
Gowda, Mahanth Krishnappa. “Motion tracking problems in Internet of Things (IoT) and wireless networking.” 2017. Web. 17 Apr 2021.
Vancouver:
Gowda MK. Motion tracking problems in Internet of Things (IoT) and wireless networking. [Internet] [Doctoral dissertation]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/2142/99369.
Council of Science Editors:
Gowda MK. Motion tracking problems in Internet of Things (IoT) and wireless networking. [Doctoral Dissertation]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99369

University of Illinois – Urbana-Champaign
29.
Wang, Ziming.
Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO).
Degree: MS, Mechanical Engineering, 2016, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/92719
► Powered ankle-foot orthoses (AFOs), which are capable of providing assistive torque at the ankle joint, have significant potential as both assistance and rehabilitation devices. Technology…
(more)
▼ Powered ankle-foot orthoses (AFOs), which are capable of providing assistive torque at the ankle joint, have significant potential as both assistance and rehabilitation devices. Technology advancements have led to great progression in the development of powered AFOs. Our group had developed the Portable Powered Ankle-Foot Orthosis (PPAFO) that was capable of providing bidirectional assistive torque at the ankle joint. Two generations of the PPAFO were previously developed. Both designs used two different off-the-shelf rotary actuators. This thesis consists of two studies focusing on the development of a new compact higher torque actuation system and the identification of a minimum sensor configuration for gait event detection for a powered AFO.
Study 1 presents the design and evaluation of a new actuation system for the PPAFO (Generation 3.0). The actuation system utilized two dual-action linear actuators and a customized gear train. Compared with the previous designs, it generated higher torque and power while providing a thinner lateral profile. The new design had a total weight of (680g) and was capable of generating 32 Nm torque and 110 W power. While running under the same torque and power level as the previous designs, the new design offered better longevity (42.9% and 81.4% increases in normalized run time for test bench emulation and treadmill walking). Although the overall weight of the new actuation system had a 20% increase compared with previous design, it could generate 166.7% more torque and 120% more power, which will enable us to test the system at various torque and power settings.
Study 2 investigated the minimum sensor configuration for detecting gait events. Knowledge of the expected orientation and behavior of a limb as related to specific events during the gait cycle (or state timing as a function of the percentage of the gait cycle, % GC) is essential to allow appropriate control of a powered AFO. A total of five sensors were selected (two force sensitive sensors, one ankle angle sensor, and two
inertial measurement units (IMU)). The performances of selected sensor configurations were quantified and compared through state-based and event-based approaches in terms of gait state estimation and gait event detection timing, respectively. Gait data were collected from five healthy subjects while walking on a treadmill wearing the Gen 3.0 PPAFO. Results indicated that, while single IMU configurations (located on the shank or foot) both outperformed all other configurations (mean state estimation error: < 2% GC; mean event detection timing error: < 23 ms), the shank IMU was able to detect more gait events than the foot IMU. Since more detectable events could improve the system's robustness (i.e., adjusting to variable speeds) by updating estimation more frequently, a single shank IMU configuration was recommended for powered AFO applications.
Advisors/Committee Members: Hsiao-Wecksler, Elizabeth T. (advisor).
Subjects/Keywords: Portable Powered Ankle-Foot Orthosis (PPAFO); Powered Ankle-Foot Orthosis (PAFO); Pneumatic; Gear design; Powered Orthosis; Inertial measurement units (IMU); Wearable sensors; Gait; Gait event detection; Gait state estimation; exoskeleton; Kalman filter; Principle component analysis (PCA)
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wang, Z. (2016). Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO). (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/92719
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Wang, Ziming. “Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO).” 2016. Thesis, University of Illinois – Urbana-Champaign. Accessed April 17, 2021.
http://hdl.handle.net/2142/92719.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Wang, Ziming. “Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO).” 2016. Web. 17 Apr 2021.
Vancouver:
Wang Z. Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO). [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2016. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/2142/92719.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Wang Z. Design of actuation system and minimization of sensor configuration for gait event detection for Gen 3.0 Portable Powered Ankle-Foot Orthosis (PPAFO). [Thesis]. University of Illinois – Urbana-Champaign; 2016. Available from: http://hdl.handle.net/2142/92719
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
30.
Tadakala, Ruchika.
Validation of a Device to Accurately Monitor Knee Kinematics during Dynamic Movements.
Degree: MSin Engineering, Mechanical Engineering, College of Engineering & Computer Science, 2018, University of Michigan
URL: http://hdl.handle.net/2027.42/146786
► The incidence of anterior cruciate ligament (ACL) injury in athletes who play multidirectional sports has increased over recent times. Female athletes are at a higher…
(more)
▼ The incidence of anterior cruciate ligament (ACL) injury in athletes who play multidirectional sports has increased over recent times. Female athletes are at a higher risk of sustaining the ACL injury when compared to their male counterparts involved in the same sport. Various intrinsic (anatomical and hormonal) and extrinsic (biomechanical) factors have been identified that contribute to the increased risk of injury. Sex differences in the kinematics and kinetics of the lower extremity between males and females have been identified while performing various physical tasks has been a topic of discussion since a long time. While it’s difficult to control the anatomical and hormonal factors, identifying and modifying the biomechanical factors that contribute to the ACL injury is possible. Wearable sensors involving
inertial measurement units (IMUs) have been developed to monitor lower extremity motion and help in assistance with rehabilitation. The purpose of this study was to validate a set of wearable IMUs against a 3D motion analysis system to monitor the lower extremity motion during jumps and runs in a laboratory and to determine whether IMUs could be used to estimate ground reaction force at landing. An average difference of 5°-10° for flexion, 4°-6° abduction and internal rotation was reported during jump and run. The results of this study showed that correlation between ground reaction force and tibial acceleration is poor when data from all the subjects were included together. However, the correlation was improved when subjects were examined individually. A strong correlation was observed between the resultant ground reaction force and the resultant tibial acceleration during jumping and running between both the legs for the eight subjects when examined individually.
Advisors/Committee Members: Esquivel, Amanda (advisor), Argento, Alan (committee member), Rawashdeh, Samir (committee member).
Subjects/Keywords: Anterior cruciate ligament injury; Knee injury; Inertial measurement units; Knee joint angles; Wearable sensors; Biomedical engineering; Mechanical engineering
…measurement units
(IMUs) have been developed to monitor lower extremity motion and help in… …using commercially available wearable device system
involving inertial measuring units (… …composed of the inertial measurement unit (IMU).
2.5.1 Inertial Measurement Unit (… …measurement units (IMUs), consisting of accelerometers,
gyroscopes and magnetic field… …Inc., Portland
OR) is an inertial measurement unit (IMU) that consists of a…
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Tadakala, R. (2018). Validation of a Device to Accurately Monitor Knee Kinematics during Dynamic Movements. (Masters Thesis). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/146786
Chicago Manual of Style (16th Edition):
Tadakala, Ruchika. “Validation of a Device to Accurately Monitor Knee Kinematics during Dynamic Movements.” 2018. Masters Thesis, University of Michigan. Accessed April 17, 2021.
http://hdl.handle.net/2027.42/146786.
MLA Handbook (7th Edition):
Tadakala, Ruchika. “Validation of a Device to Accurately Monitor Knee Kinematics during Dynamic Movements.” 2018. Web. 17 Apr 2021.
Vancouver:
Tadakala R. Validation of a Device to Accurately Monitor Knee Kinematics during Dynamic Movements. [Internet] [Masters thesis]. University of Michigan; 2018. [cited 2021 Apr 17].
Available from: http://hdl.handle.net/2027.42/146786.
Council of Science Editors:
Tadakala R. Validation of a Device to Accurately Monitor Knee Kinematics during Dynamic Movements. [Masters Thesis]. University of Michigan; 2018. Available from: http://hdl.handle.net/2027.42/146786
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