Conference Papers and Presentations

Click a title in blue to see the abstract. Underlined authors are mentored students or research staff. Keywords are in italic.

177

Srinivasan. D., Mathiassen S.E., and Huysmans M.A. (2017) Betweensubjects and between days variance in occupational sitting time among seasoned users of sitstand workstations, American Industrial Hygiene Conference & Exposition 2017, Seattle, USA.

176

Srinivasan D., Mathiassen S.E., Barbieri D.F. and Oliveira A.B. (2017). Do sit-stand workstations increase variation in upper arm postures while performing computer-intensive office work?, XXIXth Annual International Occupational Ergonomics & Safety Conference, 2017, Seattle, USA.

175

Srinivasan D., Sinden K.E., Mathiassen S.E., Cote J.N. (2016). Gender differences in muscle activity responses to a fatiguing short-cycle repetitive task. 9th International Scientific Conference on the Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2016), Toronto, Canada. Link to the book of abstract.

174

Jackson J., Srinivasan D., Mathiassen S.E. (2016). Identification of individual working styles in a long-cycle assembly task using kinematic and EMG variables. 9th International Scientific Conference on the Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2016), Toronto, Canada. Link to the book of abstract.

173

Mathiassen S.E., Srinivasan D. (2016). Sample size and statistical performance in studies of sedentary behaviour – a novel approach based on compositional data analysis. 9th International Scientific Conference on the Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2016), Toronto, Canada. Link to the book of abstract.

172

Huysmans M.A., Commissaris D.A.C.M., Mathiassen S.E., Srinivasan D., Koppes L.L.J. and Hendriksen I.J.M. (2016) Interventions to reduce sedentary behavior and increase physical activity during productive work time: effects on work performance and metabolic and physiological outcomes. 9th International Scientific Conference on the Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2016), Toronto, Canada. Link to the book of abstract.

171

Barbieri D.F., Mathiassen S.E., Srinivasan D., Dos Santos W.M., Oliveira B. (2016). Use of sit-stand stations during the first 2 months after their introduction. 9th International Scientific Conference on the Prevention of Work-Related Musculoskeletal Disorders (PREMUS 2016), Toronto, Canada. Link to the book of abstract.

170

Sandlund J., Srinivasan D. and Mathiassen S. E. (2015). Consistency of individual motor variability patterns in repetitive precision work. Proceedings of the World Confederation for Physical Therapy Congress 2015, Singapore.

169

Srinivasan D., and Mathiassen S.E. (2015). The effect of combining physical and cognitive loads on motor variability in a standardized repetitive precision task. The Proceedings of the 19th Triennial Congress of the International Ergonomics Association - Melbourne.

168

Barbieri D., dos Santos W., Inoue R.S., Gonçalves Siqueira A.A., Mathiassen S.E., Srinivasan D., Oliveira A. (2015). Adjustable sit-stand tables in office settings: development of a system for controlled posture changes. The Proceedings of the 19th Triennial Congress of the International Ergonomics Association - Melbourne.

167

Huysmans M.A., Commissaris D.A.C.M., Mathiassen S.E., Srinivasan D., Koppes L.L.J. and Hendriksen I.J.M. (2015). Interventions to reduce sedentary behaviour and increase physical activity during productive work: Preliminary results of a systematic review. The Proceedings of the 19th Triennial Congress of the International Ergonomics Association - Melbourne.

166

Christian, M. and Nussbaum, M.A. (2015) Biomarker responses to static axial trunk loading and unloading. Proceedings of the 4th Annual World Conference of the Society for Industrial and Systems Engineering, Ft. Lauderdale, FL. October 19-21, pp. 38-43.

165

Allin, L.J., Wu, X., Nussbaum, M.A. and Madigan, M.L. (2015) Falls resulting from a laboratory-induced slip occur at a higher rate among young and older adults who are obese. Proceedings of the American Society of Biomechanics Conference, Columbus, OH. August 5-8. Online only (2 pp.).

164

Garman, C.R., Nussbaum, M.A. and Madigan, M.L. (2015) Obesity increases fall rate following a laboratory-induced trip. Proceedings of the American Society of Biomechanics Conference, Columbus, OH. August 5-8. Online only (2 pp.).

163

Garman, C.R., Franck, C.T., Nussbaum, M.A. and Madigan, M.L. (2015) A bootstrapping method to assess the influence of gender on probability of tripping as a function of obstacle height. Proceedings of the American Society of Biomechanics Conference, Columbus, OH. August 5-8. Online only (2 pp.).

162

Koushyar, H., Anderson, D.E., Nussbaum, M.A. and Madigan, M.L. (2015) Obesity is associated with increased joint torques and relative effort during gait: preliminary findings. Proceedings of the American Society of Biomechanics Conference, Columbus, OH. August 5-8. Online only (2 pp.).

161

Rashedi, E., Bhatt, H. and Nussbaum, M.A. (2015) Effects of load carriage and surface inclination on slip and trip risks. Proceedings of the American Society of Biomechanics Conference, Columbus, OH. August 5-8. Online only (2 pp.).

160

Scanlon, J.M., Zadnik, A.M., Nussbaum, M.A. and Madigan, M.L. (2015) Obesity does not increase likelihood of slipping while descending ramps. Proceedings of the American Society of Biomechanics Conference, Columbus, OH. August 5-8. Online only (2 pp.).

159

Shojaei, I., Vazirian, M., Croft, E.C., Nussbaum, M.A. and Bazrgari, B. (2015) Age related changes in mechanical demands imposed on the lower back by manual material handling tasks. Proceedings of the 1st International Workshop on Spine Loading and Deformation: From Loading to Recovery. Berlin, Germany. July 2-4. p. 22.

158

Vazirian, M., Shojaei, I., Tromp, R.L., Nussbaum, M.A. and Bazrgari, B. (2015) Age and gender differences in intrinsic trunk stiffness. Proceedings of the 1st International Workshop on Spine Loading and Deformation: From Loading to Recovery. Berlin, Germany. July 2-4. p. 32.

157

Rashedi, E. and Nussbaum, M.A. (2015) Models of localized muscle fatigue: review, comparison, and future directions. Industrial and Systems Engineering Research Conference. Nashville, TN. May 31-June 3. Abstract only.

156

Jia, B. and Nussbaum, M.A. (2015) Muscle fatigue during prolonged sitting; development of a stimulation-based measure. Industrial and Systems Engineering Research Conference. Nashville, TN. May 31-June 3. Abstract only.

155

Madigan M.L., Koushyar, H., Nussbaum, M.A., Davy, K.P. (2015) Effects of obesity on lower extremity strength are joint specific. Annual Meeting of the American College of Sports Medicine, San Diego, CA, May 26-30. Abstract only.

154

Hu, B., Ning, X., and Nussbaum, M. A. (2014). The influence of hand load on lumbar-pelvic coordination during lifting task. Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 58(1), 1617-1621.

153

Allin, L.J., Wu, X., Nussbaum, M.A. and Madigan, M.L. (2014) Obesity increases fall risk after slipping among young adults. Proceedings of the 7th World Congress of Biomechanics, Boston, MA. Online only (1 p.).

152

Arena, S.L., Garman, C.R., Nussbaum, M.A., Franck, C.T. and Madigan, M.L. (2014) Required coefficient of friction decreases with increasing gait speed among older obese females. Proceedings of the 7th World Congress of Biomechanics, Boston, MA, July 6-11.

151

Garman, C.R., Scanlon, J.M., Nussbaum, M.A. and Madigan, M.L. (2014) Effects of age and obesity on the likelihood of tripping during anterior load carriage. Proceedings of the 7th World Congress of Biomechanics, Boston, MA, July 6-11.

150

Koushyar, H., Nussbaum, M.A. and Madigan, M.L. (2014) The effect of obesity on hip strength through the range-of-motion among young and older females. Proceedings of the 7th World Congress of Biomechanics, Boston, MA, July 6-11.

149

Scanlon, J.M., Nussbaum, M.A. and Madigan, M.L. (2014) Gait differences between inside a laboratory and outdoors. Proceedings of the 7th World Congress of Biomechanics, Boston, MA, July 6-11.

148

Wu, X., Madigan, M.L. and Nussbaum, M.A.. (2014) Plantar sensitivity is impaired among young adults with high BMI. Proceedings of the 7th World Congress of Biomechanics, Boston, MA, July 6-11.

147

Kim, S. and Nussbaum, M.A. (2014) Inertial motion capture system accuracy in estimating balance-related metrics. Presented at the Industrial and Systems Engineering Research Conference. Montréal, Canada. May 31-June 3. Abstract only.

146

Kim, S. and Nussbaum, M.A. (2014) Predicting ergonomic exposures: case study on panelized wall handling. Presented at the Industrial and Systems Engineering Research Conference. Montréal, Canada. May 31-June 3. Abstract only.

145

Cullen, R. H., & Agnew, M. J. (2013). The Influence of Mental Workload on Trunk Stability and Neuromuscular Control. Proceedings of the Human Factors and Ergonomics Society Annual Meeting.

144

Pau, M., Leban, B., Paderi, M. & Nussbaum, M. A. (2013). Characterization of Pulling Forces Exerted by Primary School Children While Carrying Trolley Bags. Proceedings of the Human Factors and Ergonomics Society 57th Annual Meeting. San Diego, CA. September 30-October 4. pp.501-505.

143

Rossi, C. M., Matrangola, S. L., Nussbaum, M. A. & Madigan, M. L. (2013). Effects of age and obesity on risk of tripping during level walking. Annual Meeting of the American Society of Biomechanics. Omaha, NE. September 4-7.

142

Rashedi, E., Kim, S., Nussbaum, M. A. & Agnew, M. J. (2013). Effects of using an assistive device for overhead work. Annual Meeting of the American Society of Biomechanics. Omaha, NE. September 4-7.

141

Matrangola, S., Rossi, C., Nussbaum, M. A. & Madigan, M. L. (2013). Effects of age and obesity on risk of slipping during level walking. Annual Meeting of the American Society of Biomechanics. Omaha, NE. September 4-7.

140

Koushyar, H., Matrangola, S., Nussbaum, M. A. & Madigan, M. L. (2013). Obesity-related difference in lower extremity strength amang young females: preliminary findings. Annual Meeting of the American Society of Biomechanics, Omaha, NE. September 4-7.

139

Cavuoto, L. & Nussbaum, M. A. (2013). Influence of obesity and age on upper extremity functional performance. Industrial and Systems Engineering Research Conference (ISERC), San Juan, Puerto Rico. May 18-22. Abstract only.

138

Christian, M. & Nussbaum, M. A. (2013). Biomarkers as a potential tool for assessing work-related musculoskeletal disorder risk. Proceedings of the XXVth Annual Occupational Ergonomics and Safety Conference, Atlanta, GA. June 6-7. pp. 44-49.

137

Rashedi, E., Jia, B., Nussbaum, M.A. & Lockhart, T. E. (2012). Investigating the effects of slipping on lumbar muscle activity, kinematics, and kinetics. Proceedings of the Human Factors and Ergonomics Society 56th Annual Meeting. Boston, MA. October 22-26. pp.1201-1205.

136

Toosizadeh, N., Nussbaum, M.A. & Madigan, M. L. (2012). Viscoelastic modeling of the lumbar spine: the effect of prolonged flexion on internal loads. Proceedings of the American Society of Biomechanics Annual Conference. Gainesville, FL. August 15-18.

135

Muslim, K., Hendershot, B., Toosizadeh, N., Nussbaum, M.A., Bazrgari, B. & Madigan, M. (2012). Disburbances to intrinsic stiffness and reflexive muscle responses following repeated static trunk flexion. Proceedings of the American Society of Biomechanics Annual Conference. Gainesville, FL. August 15-18.

134

Hendershot, B.D. & Nussbaum, M.A. (2012). Reduced and asymmetric trunk stiffness among unilateral lower-limb amputees during muti-directional trunk perturbations. Proceedings of the American Society of Biomechanics Annual Conference. Gainesville, FL.

133

Bazrgari, B., Nussbaum, M.A., Madigan, M. L. & Shirazi-Adl, A. (2012). Trunk dynamic responses to sudden perturbations: Effects of soft tissue wobbling. Proceedings of the 4th American Conference on Human Vibration, Hartford, CT. June 13-15. pp. 113-114.

132

Kim, S. & Nussbaum, M.A. (2012). Performance of an inertial motion capture system in estimating kinetics. Industrial & Systems Engineering Research Conference (ISERC). Orlando, FL. May 19-23. Abstract only.

131

Cavuoto, L.A. & Nussbaum, M.A. (2012). Effects of obesity on muscular capacity during sustained isometric exertions. Industrial & Systems Engineering Research Conference (ISERC), Orlando, FL. May 19-23. Abstract only.

130

Cavuoto, L.A. & Nussbaum, M.A. (2012). Occupational issues related to worker obesity. Applied Ergonomics Conference, Nashville, TN. March 26-29. Abstract only.

129

Hendershot, B., Bazrgari, B., Nussbaum, M.A. & Madigan, M. (2011). Comparison of mechanical- and EMG-based estimates of trunk reflexes to sudden perturbation. Proceedings of the Biomedical Engineering Society Annual Meeting. Hartford, CT. October 12-15. Abstract only.

128

Nussbaum, M. A. & Shewchuk, J. P. (2011). Development of a system to enhance residential construction ergonomics and productivity using wall panels. Proceedings of the International Council for Research and Innovation in Building and Construction (CIB) Meeting: W099 – Safety and Health in Construction. Washington, DC. August 24-26. (Paper #12, 10 pp.).

127

Miller, E., Bazrgari, B., Nussbaum, M. & Madigan, M. (2011). Effects of exercise-induced low back pain on intrinsic trunk stiffness. Proceedings of the American Society of Biomechanics Annual Meeting. Long Beach, CA. August 10-13.

126

Jia, B., Nussbaum, M. A., Kim, S. & Rashedi, E. (2011). Effects of reducing the number of inputs on EMG-based model estimates of lumbar spine biomechanics. Proceedings of the XXIIIrd Annual International Occupational Ergonomics and Safety Conference. Baltimore, MD. June 9-10. pp. 41-46.

125

Horton, L., Nussbaum, M.A. & Agnew, M.J. (2011). The effects of job rotation frequency and task order on localized muscle fatigue and performance. Proceedings of the XXIIIrd International Occupational Ergonomics and Safety Conference. Baltimore, MD. June 9-10. pp. 106-110.

124

Agnew, M. & Nussbaum, M. A. (2011). Efficacy of ergonomic features incorporated in hospital beds. Applied Ergonomics Conference. Orlando, FL. March 21-24. Abstract only.

123

Kyung, G. & Nussbaum, M. A. (2010). Assessment of Aging Effects on Drivers’ Perceptual and Behavioral Responses Using Subjective Ratings and Pressure Measures. Measuring Behavior 2010 (7th International conference on Methods and Techniques in Behavioral Research). Eindhoven, The Netherlands. August 24-27. pp.318-321.

Aging, comfort, discomfort, driving experience, interface pressure

122

Toosizadeh, N., Bazrgari, B., Hendershot, B., Muslim, K. & Nussbaum, M. A. (2010). In vivo load-relaxation of the trunk with prolonged flexion (podium). 34th Annual Meeting of the American Society of Biomechanics. Providence, RI. August 18-21.

121

Miller, E., Bazrgari, B., Hendershot, B., Nussbaum, M.A. & Madigan, M.L. (2010). Dynamic response of the trunk to position perturbations: effects of gender, preload, and trunk angle (poster). Proceedings of the American Society of Biomechanics Annual Meeting. Providence, RI. August 18-21.

120

Hendershot, B., Bazrgari, B., Muslim, K., Toosizadeh, N., Nussbaum, M. & Madigan, M. (2010). Disturbances to intrinsic stiffness and reflexive muscle responses following prolonged trunk flexion (poster). Proceedings of the 34th Annual Meeting of the American Society of Biomechanics. Providence, RI. August 18-21.

119

Bazrgari, B., Nussbaum, M. A. & Madigan, M. L. (2010). Effects of experimental setup and modeling assumptions on predicted trunk properties using a system identification method (poster). Proceedings of the 34th Annual Meeting of the American Society of Biomechanics. Providence, RI. August 18-21.

118

Qu, X. & Nussbaum, M. A. (2010). A three-dimensional balance control model of quiet upright stance based on an optimal control strategy. XVIII Congress of the International Society of Electrophysiology and Kinesiology (ISEK). Aalborg, Denmark. June 16-19. CD only, not paginated (1 pp.).

117

Qu, X. & Nussbaum, M. (2010). Model-Based Investigation of the Roles of Efferent and Afferent Noise in Balance Control in the Postural Control System. Proceedings of the 6th World Congress of Biomechanics (WCB 2010). Singapore. August 1-6. pp.83-86.

Balance control, efferent/afferent noise, model simulation, center of pressure

116

Lin, D., Kim, S. & Nussbaum, M.A. (2010). Effects of lumbar extensor fatigue and surface inclination on postural control during quiet stance. International Conference on Fall Prevention and Protection. Morgantown, WV. May 18-20. pp.164-166.

115

Mehta, R., Harrop, S., & Agnew, M. J. (2009). Effects of Physical and Mental Demands on Muscle Activity of the Upper Extremity. Proceedings of the Human Factors and Ergonomics Society Annual Meeting.

114

Lee, Y. S., Smith-Jackson, T. L. & Nussbaum, M. A. (2009). Multidimensional Training System Evaluation using the Revised Bloom's Taxonomy. Proceedings of the Human Factors and Ergonomics Society 53rd Annual Meeting. San Antonio, TX. October 19-23, pp.1878-1882.

113

Davidson, B., Madigan, M., Nussbaum, M. & Wojcik, L. (2009). Recovery from postural perturbations without stepping following localized muscle fatigue. Proceedings of the American Society of Biomechanics (ASB) Annual Meeting. State College, PA. August 27-29.

112

Jia, B., Kim, S. & Nussbaum, M. A. (2009). Influence of Panelized Wall Mass and Wall Erection Tasks on Physical Demands in Residential Construction: Muscle Activity and Trunk Kinematics. Proceedings of the International Ergonomics Association (IEA). Beijing, China. August 9-14. pp.103-108

111

Tanaka, M. L., Nussbaum, M. A. & Ross, S. D. (2009). Determining the threshold of stability during unstable sitting. Proceedings of the ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, Lake Tahoe, CA. June 17-21. SBC2009-20365.

110

Wojcik, L. A., Lin, D., Nussbaum, M. A., Shibata, P. A. & Madigan, M. L. (2009). Age and Gender Differences in the Effects of Localized Muscle Fatigue on Joint Torques Used During Bipedal Stance. Proceedings of the ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, Lake Tahoe, CA. June 17-21. SBC2009-204239. pp.27-28.

Fatigue, Muscle, Wounds, Safety

109

Littlejohn, R. A. N., Babski-Reeves, K.L. & Nussbaum, M.A. (2009). Thermographic assessment of the forearm during and following a data entry task. Proceedings of the Industrial Engineering Research Conference (IERC). Miami, FL. May 30-June 2. pp. 919-924.

Stability

108

Kleiner, B., Nussbaum, M., Smith-Jackson, T., Songer, A., Nieto, A., Mills, T., Burdisso, R., Hindman, D., Young-Corbett, D. & Vorster, M. (2009). A socio-technical systems approach to innovation in construction safety and health: a formative evaluation. Proceedings of the Industrial Engineering Research Conference (IERC). Miami, FL. May 30-June 2. Abstract only.

107

Kim, S., Jia, B. & Nussbaum, M.A. (2009). Perceived physical demands during residential construction using panelized walls. Proceedings of the Industrial Engineering Research Conference (IERC). Miami, FL. May 30-June 2. pp. 931-936.

106

Kim, S., Jia, B. & Nussbaum, M.A. (2009). Hand forces and trunk motion during panelized wall construction. Proceedings of the Industrial Engineering Research Conference (IERC). Miami, FL. May 30-June 2. pp. 943-948.

105

Horton, L. M., Mehta, R. K., Kim, S., Agnew, M. J. & Nussbaum, M. A. (2009). Effects of alternative hospital bed design features on physical demands. Proceedings of the Industrial Engineering Research Conference (IERC), Miami, FL. May 30 - June 2. pp. 937-942.

104

Kyung, G. & Nussbaum, M. A. (2009). Perception-behavior engineering as an integrated human factors methodology: application to the driver workspace interface design. Proceedings of the Ergonomics Society of Korea Spring Conference, Suwon, Korea. May 27. CD only, not paginated, 5pp.

103

Mehta, R., & Agnew, M. J. (2008). An Investigation of the Impact of Fatigue and Aging on the Performance of Spatially Constrained Assembly Tasks Commonly Found in the Construction Industry. Proceedings of the Human Factors and Ergonomics Society Annual Meeting.

102

Zhang, H. & Nussbaum, M. A. (2008). Frequencies in Center of Pressure Time Series above 1Hz during Quiet Upright Stance Reflect the Use of a Hip Strategy. Proceedings of the Human Factors and Ergonomics Society 52nd Annual Meeting. New York, NY. September 22-26. pp.1088-1092.

101

Jia, B., Barker, L. M., Kim, S., Agnew, M. J. & Nussbaum, M. A. (2008). Ergonomic Design in Hospital Beds: Comparison of Brake Pedal Design and Steering-assistance Features. Proceedings of the Human Factors and Ergonomics Society 52nd Annual Meeting. New York, NY. September 22-26, pp.1040-1044.

100

Na, S., Chung, M. K., Kee, D. & Nussbaum, M. A. (2008). The effect of external loads on whole body discomfort. Proceedings of the North American Conference on Biomechanics. Ann Arbor, MI. August 5-9.

99

Matrangola, S. L., Madigan, M. L., Davidson, B. S. & Nussbaum, M. A. (2008). Correlation between postural sway during quiet standing and balance recovery after small perturbations. Proceedings of the North American Conference on Biomechanics. Ann Arbor, MI. August 5-9.

98

Kim, S., Nussbaum, M. A. & Madigan, M. L. (2008). Effects of lumbar extensor fatigue on postural control assessed with fractal analysis. Proceedings of the North American Conference on Biomechanics. Ann Arbor, MI. August 5-9.

97

Anderson, D. E., Madigan, M. L. & Nussbaum, M. A. (2008). A novel technique to determine gravitational and passive joint torques from dynomometer-measured passive torque data. Proceedings of the North American Conference on Biomechanics. Ann Arbor, MI. August 5-9.

96

Davidson, B. S., Madigan, M.L., Southward, S.C. & Nussbaum, M.A. (2008). Identification and stability analysis of the postural control system during small magnitude perturbations. Proceedings of the ASME 2008 Summer Bioengineering Conference (SBC2008). Marco Island, FL. June 25-29.

95

Zhang, H. & Nussbaum, M. A. (2007). Identification of Aging Effects on the Control of Upright Stance Using a Local Maximum Wavelet Transform Method. Proceedings of the Human Factors and Ergonomics Society 51st Annual Meeting. Baltimre, MD. October 1-5, pp. 40-44.

94

Kim, S. & Nussbaum, M. A. (2007). Sensitivity and Reliability of Local Dynamic Stability: Effects of Age and Altered Sensory Conditions. Proceedings of the Human Factors and Ergonomics Society 51st Annual Meeting. Baltimre, MD. October 1-5, pp. 899-903.

93

Davidson, B. S., Madigan, M. L. & Nussbaum, M. A. (2007). Changes in the postural control system following localized muscle fatigue: a time-delayed stability analysis. Proceedings of the American Society of Biomechanics 31st Annual Conference. Stanford, CA. August 22-25.

92

Anderson, D. E., Madigan, M.L. & Nussbaum, M.A. (2007). A model of maximal voluntary joint torque variation with joint angle and angular velocity. Proceedings of the American Society of Biomechanics 31st Annual Conference. Stanford, CA. August 22-25.

91

Ryu, Y. S., Babski-Reeves, K., Smith-Jackson, T. L. & Nussbaum, M. A. (2007). Enhancing the Mobile Phone Usability Questionnaire (MPUQ) with a multi-criteria decision-making method. Proceedings of Human Computer Interaction International Conference (HCII). Beiging, China. July 22-27, pp. 95-97.

90

Davidson, B. S., Madigan, M. L. & Nussbaum, M. A. (2007). Identification and stability analysis of the postural control system during small magnitude perturbations: the effects of aging and muscle fatigue. 6th Annual Graduate Student Symposium of the VT-WF School of Biomedical Engineering and Sciences. Virginia Tech. May 10.

89

Nussbaum, M. A. (2006). Repetitive work cycles and localized muscle fatigue. Ergonomic Interventions and Research: Preventing Musculoskeletal Disorders, San Francisco, CA, December 14-15.

88

Nussbaum, M. A. & Shewchuk, J. P. (2006). Developing a decision support tool for ergonomic construction design. Occupational Biomechanics Symposium: Celebrating 35 Years of Progress and Looking Toward the Future. Ann Arbor, MI. November 16-17.

87

Qu, X., Nussbaum, M.A. & Madigan, M.L. (2006). Analysis of Human Postural Control during Spontaneous Sway Using an Optimal Control Model. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting. San Francisco, CA. October 16-20, pp.1137-1141.

86

Ryu, Y. S., Lee, Y. S., Smith-Jackson, T. L., Nussbaum, M. A. & Tomioka, K. (2006). User Centered Design and Testing Methods for the Development of the Menu System for Mobile Phones. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting. San Francisco, CA. October 16-20, pp.2183-2186.

85

Lin, D., Seol, H., Nussbaum, M. A. & Madigan, M. L. (2006).Reliability of COP-Based Postural Sway Measures. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting. San Francisco, CA. October 16-20, pp. 1336-1340.

84

Lee, Y. S., Jhangiani, I., Smith-Jackson, T. L., Nussbaum, M. A. & Tomioka, K. (2006). Design Considerations for Accessible Mobile Phones. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting. San Francisco, CA. October 16-20, pp.2178-2182.

83

Kim, S., Hurley, M. J., Nussbaum, M. A., Hughes, L. E. & Babski-Reeves, K. L. (2006). Residential Wall Panel Designers' Knowledge and Attitudes toward Ergonomics. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting. San Francisco, CA. October 16-20, pp.1892-1896.

82

Kim, H. N., Nussbaum, M. A., Seol, H., Kim, S. & Smith-Jackson, T. L. (2006). Risk Assessment of Panelized Wall Systems in Residential Construction Using Critical Incident Technique. Proceedings of the Human Factors and Ergonomics Society 50th Annual Meeting. San Francisco, CA. October 16-20, pp.2222-2226.

81

Qu, X., Nussbaum, M.A. & Madigan, M.L. (2006). Interpretation of human balance control based on an optimal control model. Proceedings of the American Society of Biomechanics Annual Conference. Blacksburg, VA. September 6-9.

80

Singh, N. & Nussbaum, M. (2006). Influence of visual and somatosensory inputs on the frequency distribution of sway during quiet standing. Proceedings of the American Society of Biomechanics Annual Conference. Blacksburg, VA. September 6-9.

79

Nussbaum, M. A. (2006). Needs for and potential applications of basic biomechanics research in occupational biomechanics. Invited Symposium speaker (“Future Directions in Occupational Biomechanics”). Proceedings of the American Society of Biomechanics Annual Conference. Blacksburg, VA. September 6-9.

78

Davidson, B. S., Madigan, M. L. & Nussbaum, M. A. (2006). Analysis of joint kinematics during quiet standing following localized lumbar extensor fatigue. Proceedings of the American Society of Biomechanics 30th Annual Conference. Blacksburg, VA. September 6-9.

77

Bieryla, K. A., Madigan, M.L. & Nussbaum, M.A. (2006). A feasibility study of trip recovery training as a fall prevention intervention. Proceedings of the American Society of Biomechanics Annual Conference. Blacksburg, VA. September 6-9.

76

Zhang, H. B. & Nussbaum, M. A. (2006). Identification of the effects of localize muscle fatigue on postural sway through wavelet analysis. Proceedings of the Virginia Academy of Sciences. Blacksburg, VA. May 25. (abstract only).

75

Davidson, B. S., Madigan, M.L. & Nussbaum, M.A. (2006). Changes in balance with low back fatigue. Proceedings of the Virginia Academy of Sciences. Blacksburg, VA. May 25. (abstract only).

74

Bieryla, K. A., Madigan, M.L. & Nussbaum, M.A. (2006). Trip recovery: can we improve it through practice to prevent falls?" Proceedings of the Virginia Academy of Sciences. Blacksburg, VA. May 25. (abstract only).

73

Bieryla, K. A., Madigan, M.L., Nussbaum, M.A. (2006). Repeated exposure to a simulated trip improves trip recovery performance. 5th Annual Graduate Student Symposium of the VT-WF School of Biomedical Engineering and Sciences. Wake Forest University. May 11. (abstract only).

72

Davidson, B. S., Madigan, M.L., Nussbaum, M.A. (2006). Localized changes in joint kinematics during quiet standing following lumbar extensor fatigue. 5th Annual Graduate Student Symposium of the VT-WF School of Biomedical Engineering and Sciences. Wake Forest University. May 11, 2006. (abstract only).

71

Nussbaum, M. A. & Yassierli. (2006). Aging and intermittent work capacity. Proceedings of the NIOSH NORA 2006 Symposium. Washington, CD. April 18-20. Poster #0103, pp. 258-259.

70

Wilson, E. L., Madigan, M.L., Davidson, B.S., Nussbaum, M.A. (2005). Lumbar extensor fatigue changes postural recovery strategy. International Society of Biomechanics XXth Congress. Cleveland, OH. August 1-5.

69

Singh, N. B., Nussbaum, M. A., Lin, D. & Madigan, M. L. (2005). Effect of Localized Muscle Fatigue Induced at Different Joints on Postural Control. Proceedings of the Human Factors and Ergonomics Society 49th Annual Meeting. Orlando, FL. September 26-30, pp.1306-1310.

68

Perez, M. A. & Nussbaum, M. A. (2005). Prediction of 2-D Lift Motions Using Artificial Neural Networks: An Evolutionary Approach. Proceedings of the Human Factors and Ergonomics Society 49th Annual Meeting. Orlando, FL. September 26-30, pp.1405-1409.

67

Krausman, A. S. & Nussbaum, M. (2005).Effects of Chemical Protective Clothing on Task Performance Using Wearable Input Devices. Proceedings of the Human Factors and Ergonomics Society 49th Annual Meeting. Orlando, FL. September 26-30. pp.651-655.

66

Lee, Y. S., Ryu, Y. S., Smith-Jackson, T. L., Shin, D. J., Nussbaum, M. A. & Tomioka, K. (2005). Usability testing with cultural groups in developing a cell phone navigation system. Proceedings of the 11th International Conference on Human-Computer Interaction (HCII '05). Las Vegas, NV. July 22-27. CD-ROM (not paginated).

65

Kleiner, B. M., Nieto, A., Nussbaum, M.A., Smith-Jackson, T., Songer, A., Wakefield, R. & Mills, T. (2005). A Socio-technical systems approach to innovation in construction safety and health. Industrial Engineering Research Conference. Atlanta, GA. May 14-18.

64

Davidson, B. S., Madigan, M. & Nussbaum, M. (2005). Lumbar extensor fatigue effects postural control by increasing ankle stiffness. ASME 2005 Summer Bioengineering Conference. Vail, CO. June 22-26.

63

Yassierli, Nussbaum, M. A. & Iridiastadi, H. (2004). Age-Related Differences in Shoulder Isometric Endurance, Fatigue, and Recovery. Proceedings of the Human Factors and Ergonomics Society 48th Annual Meeting, New Orleans, LA. September 20-24. pp.1435-1439.

62

Sood, D., Nussbaum, M. A. & Babski-Reeves, K. L. (2004). Effects of Work Conditioning and Adjustment Period on Psychophysical Estimates in Manual Torquing Tasks. Proceedings of the Human Factors and Ergonomics Society 48th Annual Meeting. New Orleans, LA. September 20-24. pp.1388-1392.

61

Lee, Y. S., Smith-Jackson, T. L., Nussbaum, M. A., Tomioka, K. & Bhatkhande, Y. (2004). Use of Product-Interactive Focus Groups for Requirements Capture and Usability Assessment. Proceedings of the Human Factors and Ergonomics Society 48th Annual Meeting. New Orleans, LA. September 20-24. pp.2461-2464.

60

Meller, R. D., Kleiner, B.K. & Nussbaum, M.A. (2004). The facility layout problem: a new model to support a bottom-up approach to facility design. Proceedings of the 8th International Material Handling Research Colloquium. Graz, Austria. June 13-17. pp. 1-14 (CD, not paginated).

59

DiDomenico, A. & Nussbaum, M. A. (2004). Postural stability ratings as a predictor of postural sway. Proceedings of the 9th Annual Meeting of the Gait and Clinical Movement Analysis Society. Lexington, KY. April 21-24.

58

Davidson, B. S., Madigan, M. L. & Nussbaum, M. A. (2004). Effects of fatigue rate on balance degradation. Virginia Tech – Wake Forest University 3rd Student Research Symposium. Wake Forest, NC, April 24.

57

Yassierli, Y. & Nussbaum, M. A. (2003). Logarithmic Power-Frequency: An Alternative Method for Emg-Based Fatigue Assessment. Proceedings of the Human Factors and Ergonomics Society 47th Annual Meeting. Denver, CO. October 13-17. pp.1184-1188.

56

Nam, C. S., Kim, H. N., Smith-Jackson, T. L. & Nussbaum, M. A. (2003). Development of a Guidelines Tool for Mobile Phone Interfaces. Proceedings of the Human Factors and Ergonomics Society 47th Annual Meeting. Denver, CO. October 13-17. pp.792-796.

55

Iridiastadi, H. & Nussbaum, M. A. (2003). Recovery and Repeatability of EMG Measures during Low-Intensity, Intermittent Isometric-Isotonic Shoulder Efforts. Proceedings of the Human Factors and Ergonomics Society 47th Annual Meeting. Denver, CO. October 13-17. pp.1179-1183.

54

DiDomenico, A. & Nussbaum, M. A. (2003). Effects of Mental Workload on Objective and Subjective Measures of Postural Stability. Proceedings of the Human Factors and Ergonomics Society 47th Annual Meeting. Denver, CO. October 13-17. pp.1145-1149.

53

Perez, M. A. & Nussbaum, M. A. (2003). Exploratory surface electromyography analysis using principal components analysis. Proceedings of the American Society of Biomechanics Annual Conference. Toledo, OH. September 25-27. Paper #88.

52

Nussbaum, M. A. & Yassierli. (2003). Assessment of localized muscle fatigue furing low-moderate static contractions using the fractal dimension of EMG. Proceedings of the XVth Triennial Congress of the International Ergonomics Association. Seoul, Korea, August 25-29.

51

Tomioka, K., Kato, S., Mooney, A. M., Nussbaum, M. A. & Smith-Jackson, T. L. (2002). A study on accessibility of cellular phones for users with disabilities. Proceedings of the International Conference for Universal Design, Yokohama, Japan.. pp. 711-717.

50

Sood, D., Hager, K. & Nussbaum, M. A. (2002). The Effects of Differing Overhead Heights on Shoulder Fatigue during a Repetitive Intermittent Task. Proceedings of the Human Factors and Ergonomics Society 46th Annual Meeting, Baltimre, MD. September 30-October 4. pp.1081-1085.

49

Perez, M. A. & Nussbaum, M. (2002). Application of Principal Components Analysis for Evaluation and Classification of Complex Emg Data. Proceedings of the Human Factors and Ergonomics Society 46th Annual Meeting. Baltimore, MD. September 30-October 4. pp.1147-1151.

48

Mooney, A. M., Nussbaum, M. A. & Smith-Jackson, T. L. (2002). Universal Access in Practice: Usability Evauation of Cellular Telephones for Users with Disabilities. Proceedings of the Human Factors and Ergonomics Society 46th Annual Meeting. Baltimre, MD. September 30-October 4. pp.695-699.

47

Astin, A. & Nussbaum, M. A. (2002). Interactive Effects of Physical and Mental Workload on Subjective Workload Assessment. Proceedings of the Human Factors and Ergonomics Society 46th Annual Meeting. Baltimore, MD. September 30-Ocgtober 4. pp.1100-1104.

46

Iridiastadi, H. & Nussbaum, M. A. (2002). An evaluation of muscle fatigue during intermittent efforts involving short and long work-cycles. Biomedical Engineering: Recent Developments, Proceedings of the 21st Southern Biomedical Engineering Conference. Washington, DC. September 27-29.

45

Tomioka, K. & Nussbaum, M. (2002). An application of myoelectric analysis for home appliance evaluation. Proceedings of the 6th International Conference of Physiological Anthropology. Cambridge, England. August 24-27.

44

Perez, M. A. & Nussbaum, M. A. (2002). Performance of artificial neural networks in the prediction of lower torso muscle recruitment patterns. Virginia Journal of Science. 53(2), 75. (Proceedings of the 80th Annual Meeting of the Virginia Academy of Science. Hampton, VA, May 21-24.).

43

Perez, M. A. & Nussbaum, M. (2001). Performance of an Artificial Neural Network Model in the Prediction of Lower Torso Muscle Recruitment Patterns. Proceedings of the Human Factors and Ergonomics Society 45th Annual Meeting. Minneapolis, MN. October 8-12. pp.1011-1015.

42

McCreary, F., Ehrich, R., Nussbaum, M. & Lisanti, M. (2001). A Case Study in the Participatory Evaluation of an Elementary Classroom Workstation. Proceedings of the Human Factors and Ergonomics Society 45th Annual Meeting. Minneapolis, MN. October 8-12. pp.796-800.

41

Johnson, H. E. & Nussbaum, M. A. (2001). Analysis of a Self-Regulating Method for Determining Acceptable Finger Force Limits. Proceedings of the Human Factors and Ergonomics Society 45th Annual Meeting. Minneapolis, MN. October 8 - 12. pp.1031-1035.

40

Astin, A. D. & Nussbaum, M. A. (2001). Review of workload assessment tools, with special emphasis on subjective methodologies. Advances in Occupational Ergonomics and Safety 4: Procedings of the International Occupational Ergonomics and Safety Conference. Fairfax, VA. Bittner Jr. A.C., Champney, P.C. and Morrissey, S.J. (eds), IOS Press, Amsterdam, pp.11-17.

39

Nussbaum, M. A. (2000). Fatigue measures for the design and evaluation of cyclic work. Proceedings of the 7th International Conference on Industrial Engineering and Engineering Management, Guangzhou, China, pp. 262-265

38

Perez, M. A. & Nussbaum, M. (2000). Empirical Evaluation of Models Used to Predict Torso Muscle Forces. Proceedings of the XIVth Triennial Congress of the International Ergonomics Association and 44th Annual Meeting of the Human Factors and Ergonomics Society. San Diego, CA. July 29-August 4. pp.620-623.

37

Astin, A. D. & Nussbaum, M. A. (2000). The Use of Standardized Forearm EMG Measures to Predict Single and Multi-Digit Forces. Proceedings of the XIVth Triennial Congress of the International Ergonomics Association and 44th Annual Meeting of the Human Factors and Ergonomics Society. San Diego, CA. July 29-August 4. pp.559-562.

36

Nussbaum, M. A. (2000). Shoulder fatigue during cyclic overhead work. Proceedings of the American Industrial Hygiene Conference and Exposition. Orlando, FL. paper #258.

35

Perez, M. A. & Nussbaum, M. (2000). Evaluation of torso muscle force predictive models. Proceedings of the 19th Southern Biomedical Engineering Conference, Blacksburg, VA, p. 22.

34

DiDomenico, A. & Nussbaum, M. A. (2000). Prediction of single and multi-digit forces from standardized forearm EMG measures. Proceedings of the 19th Southern Biomedical Engineering Conference. Blacksburg, VA. pp. 31.

33

DiDomenico, A. & Nussbaum, M. A. (1999). Finger Forces and Predictability using various Hand Couplings. Proceedings of the Human Factors and Ergonomics Society 43rd Annual Meeting. Houston, TX. September 27-October 1. Paper # 154, pp.698-702.

32

Chaffin, D. B., Georgi, C., Baker, G. & Nussbaum, M. (1998). Dynamic Shoulder Loads in Reaching and Materials Handling Tasks. Proceedings of the Human Factors and Ergonomics Society 42nd Annual Meeting. Chicago, IL. October 5-9. pp.917-920.

31

Zhang, X., Nussbaum, M. A. & Chaffin, D. B. (1998). Back Lift versus Leg Lift: A Dynamic Lifting Strategy Index. Proceedings of the Human Factors and Ergonomics Society 42nd Annual Meeting. Chicago, IL. October 5-9. pp.891-895.

30

DiDomenico, A., Nussbaum, M. A. & Kroemer, K. H. (1998). Measurement and Prediction of Finger Forces. Advances in Occupational Ergonomics and Safety 2: Proceedings of the International Occupational Ergonomics and Safety Conference. Ypsilanti, M.I., Kumar, S. (eds), IOS Press, Amsterdam, pp. 386-389.

29

Chaffin, D. B., Woolley, C., Foulke, J., Rabourn, R., Nussbaum, M. & Jimmerson, G. (1998). Some ergonomic principles for materials handling devices. Proceedings of the American Industrial Hygiene Association. Atlanta, GA. paper #292.

28

Nussbaum, M. A. & Chaffin, D. (1998). Kinematic and Kinetic Changes Associated with Increased Pacing when Using a Material Handling System [Manipulator]. in Occupational Ergonomics and Safety 2: Proceedings of the International Occupational Ergonomics and Safety Conference. Ypsilanti, M.I., Kumar, S. (eds), IOS Press, Amsterdam, pp. 304-307.

27

Nussbaum, M. A., Chaffin, D. B. & Baker, G. (1997). Effects of Pacing on Spinal Loads When Using Material Handling Systems. Proceedings of the Human Factors and Ergonomics Society 41st Annual Meeting. Albuquerque, NM. September 22-26. pp.652-656.

26

Chaffin, D. B., Nussbaum, M.A., Foulke, J., Wooley, C., Stump, B. & Baker, G. (1997). Torso modelling of peak exertions required when using materials handling devices. Proceedings of the International Ergonomics Association. Tampere, Finland. vol. 3, pp. 502-504.

25

Chaffin, D. B., Nussbaum, M.A. & Sowden, C. (1997). The development of a biomechanical model of the low back for evaluating materials handling devices. Proceedings of the American Industrial Hygiene Association. Dallas, TX, paper #139.

24

Nussbaum, M. A. & Chaffin, D. B. (1997). Laboratory environment and biomechanical modeling tools for ergonomic assessment of material handling devices. Advances in Occupational Ergonomics and Safety. Das, B. and Karwowski, W. (eds.), IOS Press, Inc., Burke, VA. pp.233-236.

23

Zhang, X., Nussbaum, M.A. & Chaffin, D.B. (1996). Calibrating instantaneous helical axes to identify the elbow and shoulder joint centers for movement studies. Proceedings of the American Society of Biomechanics Society 20th Annual Meeting. Atlanta, GA. pp.249-250.

22

Nussbaum, M., Zhang, X., Chaffin, D., Stump, B. & Raschke, U. (1996). A reduced surface marker set for upper limb kinematics: heuristics and optimization. Proceedings of the American Society of Biomechanics Society 20th Annual Meeting. Atlanta, GA. pp.251-252.

21

Nussbaum, M. A. & Chaffin, D. B. (1996). The lumbar tissue injury prediction model: a framework for investigating spinal injury risk. Proceedings of the American Industrial Hygiene Conference and Exposition. Philadelphia, PA, paper #59.

20

Lavender, S. A., Li, Y., Natarajan, R. N. R., Andersson, G. B. J. & Nussbaum, M. (1995). The Effects of Lifting Speed and Load Magnitude on the Torsional and Lateral Bending Moments during Twisting. Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting. San Diego, CA. October 9-13. pp.954.

19

Nussbaum, M. A., Chaffin, D. B. & Page, G. B. (1995). A Biomechanical Investigation of the Asymmetric Multiplier in the Revised NIOSH Lifting Equation. Proceedings of the Human Factors and Ergonomics Society 39th Annual Meeting. San Diego, CA. October 9-13. pp.709-713.

18

Nussbaum, M. A., Chaffin, D. B., Martin, B. J. & Lavender, S. A. (1995). A network-based model of lumbar muscle coordination during static asymmetric trunk loading. Proceedings of the American Society of Biomechanics. Stanford, CA. pp. 77-78.

17

Nussbaum, M. A. & Chaffin, D. B. (1995). A biomechanical investigation of stoop, squat, and freestyle lifting: tradeoffs between lifting technique, joint strength, and spinal loads. Proceedings of The American Industrial Hygiene Conference and Exposition. St. Louis, MO. pp. 47.

16

Lavender, S. A., Li, Y. C., Natarajan, R. N., Andersson, G. B. J., Schipplein, O. D., Nussbaum, M. A. & Chaffin, D. B. (1994). The torsional and lateral bending moments during twisting: the effects of lifting speed and load magnitude. Proceedings of the Orthopaedic Research Society.

15

Nussbaum, M. A., Chaffin, D. B. & Lavender, S. A. (1994). Effects of assumed geometry, flexibility, and intrinsic strength on optimization-based force predictions. Proceedings of the American Society of Biomechanics. Columbus, OH.

14

Lavender, S. A., Andersson, G. B. J., Chen, I.-H., Trafimow, J., Nussbaum, M. A. & Chaffin, D. B. (1994). Electromyographic activities of the trunk muscles in response to lateral flexion and non-sagitally symmetric applied moments. Proceedings of the International Society for the Study of the Lumbar Spine. Toronto, Canada.

13

Nussbaum, M. A., Chaffin, D. B. & Lavender, S. A. (1994). Artificial neural networks in the analysis and simulation of lumbar muscle response. Proceedings of the Computer Aided Ergonomics Society (International Ergonomics Association). Toronto, Canada.

12

Nussbaum, M. A. & Chaffin, D. B. (1993). A competitive neural network model for the classification of individual lumbar muscle response patterns. Proceedings of the American Society of Biomechanics. Iowa City, ID.

11

Nussbaum, M. A., Chaffin, D. B., Lavender, S. A. & Rechtien, C. J. (1993). Geometric considerations in optimization-based modeling of the torso musculature. Proceedings of the XIVth International Congress on Biomechanics. Paris, France.

10

Ulin, S. S., Woolley, C. B., Nussbaum, M. A., Brouwer, M. L. & Chaffin, D. B. (1993). A laboratory study to develop and evaluate a shower cleaning tool. Proceedings of the American Industrial Hygiene Association. New Orlens, LA.

9

Nussbaum, M.A., Lavender, S.A., Chaffin, D.B. & Andersson, G.B.J. (1992). Optimization-based torso muscle force prediction: asymmetric loading in two flexed postures. Proceedings of the North American Conference on Biomechanics, Chicago, IL. pp. 525-526.

8

Nussbaum, M. A. (1992). Network models for the prediction of torso muscle activation during static loading. Proceedings of the North American Conference on Biomechanics. Chicago, IL. August 24-28. pp.349.

7

Lavender, S. A., Tsuang, Y. H., Andersson, G. B. J., Hafezi, A., Hughes, R. E., Nussbaum, M. & Chaffin, D. B. (1992). Trunk muscle coactivation: the effects of an externally applied moment's magnitude and direction. Proceeding of the Orthopaedic Research Society. Washington, D.C.

6

Nussbaum, M. A., Chaffin, D. B., Hughes, R. E. & Moga, P. J. (1991). Simulation analysis of a comprehensive torso biomechanical model. Proceedings of the XIIIth International Congress on Biomechanics. Perth, Australia.

5

Moga, P. J., Erig, M., Chafin, D. B. & Nussbaum, M. A. (1991). A comparison of torso muscle centroid-line inclination angles relative to the L3-L4 interspace. Proceedings of the American Society of Biomechanics. Tempe, AZ.

4

Nussbaum, M. A., Lavender, S. A., Hughes, R. E., Chaffin, D. B. & Andersson, G. B. J. (1991). Predicting torso muscle activity during asymmetric loading: A comparison of three optimization models. Proceedings of the American Society of Biomechanics. Tempe, AZ.

3

Nussbaum, M., Chaffin, D. B., Page, G., Foulke, J. & Woolley, C. (1990). A biomechanical analysis of switch stand operation using a two-dimensional dynamic model. Proceedings of the American Society of Biomechanics. Miami, FL. November 14-16.

2

Nussbaum, M. & Chaffin, D. B. (1990). A geometric model of the human torso. Proceedings of the American Society of Biomechanics. Miami, FL. November 14-16.

1

Chaffin, D. B., Hughes, R. E. & Nussbaum, M. A. (1989). Towards a 3D biomechanical torso model for asymmetric load handling. Proceedings of the XIIth International Congress on Biomechanics. Los Angeles, CA.