Xu Xu

Assistant Professor

919.513.7205
xxu@ncsu.edu
484 Daniels Hall

Prior to joining the NC State faculty, Xu Xu started his career as a postdoctoral research fellow in the School of Public Health at Harvard University. From there he became a research scientist in Liberty Mutual Research Institute for Safety where he received best-paper and outstanding scientific contribution award multiple times.

His research interests are generally in the areas of biomechanical modeling, optimization, simulation and data mining with respect to human daily activities to promote workplace and at-home injury prevention and driving safety. Xu has published more than 40 journal articles on the aforementioned research topics. He has also served as a research advisor for three postdoctoral research fellows.

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Education

Ph.D. 2008

Doctor of Philosophy in Industrial Engineering

NC State University

MSIE 2006

Master of Science in Industrial Engineering

NC State University

BSIE 2004

Bachelor of Science in Industrial Engineering

Tsinghua University

Research Description

Human factors and ergonomics engineering, occupational biomechanics, optimization-based biomechanical modelling, data mining on human motion data, occupational musculoskeletal injury prevention.

Publications

Identification of heel strike under a slippery condition: Chang, W. R., & Xu, X. (2018), Applied Ergonomics, 66, 32–40.
Impact of posture choice on one-handed pull strength variations at low, waist, and overhead pulling heights: Yu, D., Xu, X., & Lin, J. H. (2018), International Journal of Industrial Ergonomics, 64, 226–234.
New technologies in human factors and ergonomics research and practice: Lin, J. H., Kirlik, A., & Xu, X. (2018), Applied Ergonomics, 66, 179–181.
A computer vision based method for 3D posture estimation of symmetrical lifting: Mehrizi, R., Peng, X., Xu, X., Zhang, S. T., Metaxas, D., & Li, K. (2018), Journal of Biomechanics, 69, 40–46.
Using a marker-less method for estimating L5/S1 moments during symmetrical lifting: Mehrizi, R., Xu, X., Zhang, S. T., Pavlovic, V., Metaxas, D., & Li, K. (2017), Applied Ergonomics, 65, 541–550.
Using the Microsoft Kinect (TM) to assess 3-D shoulder kinematics during computer use: Xu, X., Robertson, M., Chen, K. B., Lin, J. H., & McGorry, R. W. (2017), Applied Ergonomics, 65, 418–423.
An entropy-assisted musculoskeletal shoulder model: Xu, X., Lin, J. H., & McGorry, R. W. (2017), Journal of Electromyography and Kinesiology, 33, 103–110.
Ergonomic evaluation of standard and alternative pallet jack handless: Harris-Adamson, C., Mielke, A., Xu, X., & Lin, J. (2016), International Journal of Industrial Ergonomics, 54, 113–119.
Evaluation of regression-based 3-D shoulder rhythms: Xu, X., Dickerson, C. R., Lin, J. H., & W., M. G. R. (2016), Journal of Electromyography and Kinesiology, 29, 28–33.
Hip and knee net joint moments that correlate with success in lateral load transfers over a low friction surface: Catena, R. D., & Xu, X. (2016), Ergonomics, 1–9.
Accuracy of the Microsoft Kinect for measuring gait parameters during treadmill walking: Xu, X., McGorry, R. W., Chou L. S., L., H., J., & Chang, C. C. (2015), Gait & Posture, 42(2), 145–151.
Age-related differences in inter-joint coordination during stair walking transitions: Chiu, S. L., Chang, C. C., Dennerlein, J. T., & Xu, X. (2015), Gait & Posture, 42(2), 152–157.
Effects of Working Environment Factors and Operator Experience on Upper Extremity Mechanical Properties During Powered Hand Tool Use: Xu, X., & J., L. (2015), IIE Transactions on Occupational Ergonomics and Human Factors, 3(2), 81–90.
Evaluation of older driver head functional range of motion using portable immersive virtual reality: Chen, K. B., Xu, X., Lin, J. H., & Radwin, R. G. (2015), Experimental Gerontology, 70, 150–156.
Lower extremity kinematics that correlate with success in lateral load transfers over a low friction surface: Catena, R. D., & Xu, X. (2015), Ergonomics, 58(9), 1571–1580.
Using horizontal heel displacement to identify heel strike instants in normal gait: Banks, J. J., Chang, W. R., Xu, X., & Chang, C. C. (2015), Gait & Posture, 42(1), 101–103.
The accuracy of the Oculus Rift virtual reality head-mounted display during cervical spine mobility measurement: Xu, X., Chen, K. B., Lin, J. H., & Radwin, R. G. (2015), Journal of Biomechanics, 48(4), 721–724.
The validity of the first and second generation Microsoft Kinect? for identifying joint center locations during static postures: Xu, X., & McGorry, R. W. (2015), Applied Ergonomics, 49, 47–54.
Joint contribution to fingertip movement during a number entry task: an application of Jacobian matrix: Qin, J., Trudeau, M., Buchholz, B., Katz, J. N., Xu, X., & Dennerlein, J. T. (2014), Journal of Applied Biomechanics, 30(2), 338–342.
Shoulder muscle fatigue development in young and older female adults during a repetitive manual task: Qin, J., Lin, J. H., Buchholz, B., & Xu, X. (2014), Ergonomics, 57(8), 1201–1212.
Upper extremity kinematic and kinetic adaptations during a fatiguing repetitive task: Qin, J., Lin, J. H., Faber, G. S., B., B., & Xu, X. (2014), Journal of Electromyography and Kinesiology, 24(3), 404–411.
A regression model predicting isometric shoulder muscle activities from arm postures and shoulder joint moments: Xu, X., McGorry, R. W., & Lin, J. H. (2014), Journal of Electromyography and Kinesiology, 24(3), 419–429.
A regression-based 3-D shoulder rhythm.: Xu, X., Lin, J. H., & McGorry, R. W. (2014), Journal of Biomechanics, 47(5), 1206–1210.
The accuracy of an external frame using ISB recommended rotation sequence to define shoulder joint angle: Xu, X., McGorry, R. W., & Lin, J. H. (2014), Gait & Posture, 39(1), 662–668.
The effect of age on the hand movement time during machine paced assembly tasks for female workers: Xu, X., Qin, J., Zhang, T., & Lin, J. (2014), International Journal of Industrial Ergonomics, 44(1), 148–152.
Effect of aging on inter-joint synergies during machine-paced assembly tasks: Xu, X., Qin, J., Catena, R. D., Faber, G. S., & Lin, J. H. (2013), Experimental Brain Research, 231(2), 249–256.
Shoulder joint loading and posture during medicine cart pushing task: Xu, X., Lin, J. H., & Boyer, J. (2013), Journal of Occupational and Environmental Hygiene, 10(8), 446–454.
The error of L5/S1 joint moment calculation in a body-centered non-inertial reference frame when the fictitious force is ignored: Xu, X., Faber, G. S., Kingma, I., Chang, C. C., & Hsiang, S. M. (2013), Journal of Biomechanics, 46(11), 1943–1947.
Assessing manual lifting tasks based on segment angle interpolations: Chang, C. C., Xu, X., Faber, G. S., Kingma, I., & Dennerlein, J. T. (2012), Work (Reading, Mass.), 41 Suppl 1, 2360–2363.
Coordinate transformation between shoulder kinematic descriptions in the Holzbaur et al. model and ISB sequence: Xu, X., Lin, J. H., & McGorry, R. W. (2012), Journal of Biomechanics, 45(15), 2715–2718.
Estimating 3-D L5/S1 moments during manual lifting using a video coding system: validity and interrater reliability: Xu, X., Chang, C. C., Faber, G. S., Kingma, I., & Dennerlein, J. T. (2012), Human Factors, 54(6), 1053–1065.
Estimation of 3-D peak L5/S1 joint moment during asymmetric lifting tasks with cubic spline interpolation of segment Euler angles: Xu, X., Chang, C. C., Faber, G. S., Kingma, I., & Dennerlein, J. T. (2012), Applied Ergonomics, 43(1), 115–120.
Transformation between different local coordinate systems of the scapula: Xu, X., Lin, J. H., Li, K., & Tan, V. (2012), Journal of Biomechanics, 45(15), 2724–2727.
Two linear regression models predicting cumulative dynamic L5/S1 joint moment during a range of lifting tasks based on static postures: Xu, X., Chang, C. C., & Lu, M. L. (2012), Ergonomics, 55(9), 1093–11103.
Estimation of low back moments from video analysis: a validation study: Coenen, P., Kingma, I., Boot, C. R., Faber, G. S., Xu, X., Bongers, P. M., & Dieen, J. H. (2011), Journal of Biomechanics, 44(13), 2369–2375.
The validity and interrater reliability of video-based posture observation during asymmetric lifting tasks: Xu, X., Chang, C. C., Faber, G. S., Kingma, I., & Dennerlein, J. T. (2011), Human Factors, 53(4), 371–382.
Comparing polynomial and cubic spline interpolation of segment angles for estimating L5/S1 net moment during symmetric lifting tasks: Xu, X., Chang, C. C., Faber, G. S., Kingma, I., & Dennerlein, J. T. (2010), Journal of Biomechanics, 43(3), 583–586.
Interpolation of segment Euler angles can provide a robust estimation of segment angular trajectories during asymmetric lifting tasks: Xu, X., Chang, C. C., Faber, G. S., Kingma, I., & Dennerlein, J. T. (2010), Journal of Biomechanics, 43(10), 2043–2048.
Prediction accuracy in estimating joint angle trajectories using a video posture coding method for sagittal lifting tasks: Chang, C. C., McGorry, R. W., Lin, J. H., Xu, X., & Hsiang, S. M. (2010), Ergonomics, 53(8), 1039–1047.
An empirical validation of a base-excitation model to predict harvestable energy from a suspended-load backpack system: Xu, X., Hsiang, S., & Mirka, G. (2010), Theoretical Issues in Ergonomics Science, 11(6), 546–560.
The effects of a suspended-load backpack on gait: Xu, X., Hsiang, S. M., & Mirka, G. A. (2009), Gait & Posture, 29(1), 151–153.
Coordination indices between lifting kinematics and kinetics: Xu, X., Hsiang, S., & Mirka, G. (2008), International Journal of Industrial Ergonomics, 38(11-12), 1062–1066.
The effect of a knee support on the biomechanical response of the low back: Shu, Y., Jiang, Z., Xu, X., & Mirka, G. A. (2008), Journal of Applied Biomechanics, 23(4), 275–281.
The effect of a knee support on the biomechanical response of the low back: Shu, Y., Jiang, Z. L., Xu, X., & Mirka, G. A. (2007), Journal of Applied Biomechanics, 23(4), 275–281. https://doi.org/10.1123/jab.23.4.275
The effects of obesity on lifting performance: Xu, X., Mirka, G. A., & Hsiang, S. M. (2007), Applied Ergonomics, 39(1), 93–98.

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Edward P. Fitts Department of Industrial & Systems Engineering