Pitt | Swanson Engineering
Cham, Rakie
Bioengineering Department
Cham, Rakie
Faculty
Associate Professor
Office: BEH 404
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PhD in Bioengineering, University of Pittsburgh, 2000

M.Sc. in Physics, McGill University, 1995

B.Sc. in Physics, McGill University, 1993

Graduate in , University of Pittsburgh Department of Rehabilitation Sciences and Technology, 1996-1996

Balance

Body segment parameters

Gait

Older adult

Sensorimotor control of balance and walking

Slips, trips, and falls

Postural control, gross movement biomechanics, gait, falls, ergonomics.

(2012) Elected Program Chair of the American Society of Biomechanics 2013 meeting.

(2005) Robert O. Agbede Award for Diversity School of Engineering, University of Pittsburgh..

(2003) Hewlett International Small Grant Award ($2,471) University Center for International Studies (UCIS), University of Pittsburgh. Travel award to present research at the International Society for Postural and Gait Research (ISPGR) held in Sydney, Australia..

(2003) National Science Foundation Travel Award ($400) Travel award to attend the NSF-sponsored Faculty Career Development Workshop given by Tim Anderson (University of Florida) and Geoff Prentice (NSF) at the University of Maine-Orono..

(1998) Outstanding Teaching Assistant Award (as a graduate student).

Chambers, A.J., Parise, E., McCrory, J.L., and Cham, R., In press, "A comparison of prediction equations for the estimation of body fat percentage in non-­-obese and obese older Caucasian adults in the United States," The Journal of Nutrition, Health and Aging.

Chambers, A.J., Perera, S., and Cham, R., In press, "Changes in walking characteristics of young and older adults when anticipating slippery floors," IIE Transactions on Occupational Ergonomics and Human Factors.

Sukits, A.L., Nebes, R.D., Chambers, A.J., Ledgerwood, A., Halligan, E.M., Perera, S., and Cham, R., In press, "Intra-individual variability in gait and in cognitive performance are not related in the elderly," Aging, Neuropsychology, and Cognition: A Journal on Normal and Dysfunctional Development, 23755959.

Cham, R., Mahaboobin, A., Redfern, M., and Nau, A., 2013, "Impact of central and peripheral vision loss on standing balance," American Society of Biomechanics (ASB), Omaha, NB.

Beschorner, K., Redfern, M.S., and Cham, R., 2013, "Earliest gait deviations during slips: Implications for recovery," IIE Transactions on Occupational Ergonomics and Human Factors, vol.1, no.1, pp. 31-37.

Coley, B., Cham, R., and Perera, S., 2013, "Knowledge of the nature of the perturbation affects young and older adults differently during trips in a mixed perturbation paradigm," American Society of Biomechanics (ASB), Omaha, NB.

Kolling, A., Montgomery, J., McCrory, J., Cham, R., and Chambers, A.J., 2013, "Impact of obesity on anthropometric predictors of body fat in older adults," American Society of Biomechanics (ASB), Omaha, NB.

Luther, A., Chambers, A.J., and Cham, R., 2013, "Kinematic analysis of foot clearance during stair ambulation in older adults with unilateral transfemoral amputations," American Society of Biomechanics (ASB), Omaha, NB.

O'Connell, C., Cham, R., and Chambers, A.J., 2013, "Comparison of knee kinematics in older adults with unilateral transfemoral amputations during baseline walking and ramp descent," American Society of Biomechanics (ASB), Omaha, NB.

Siviy, C., Chambers, A.J., and Cham, R., 2013, "Development of a geometric model to determine inertial parameters in amputees," American Society of Biomechanics (ASB), Omaha, NB.

Cham, R., Perera, S., Studenski, S.A., and Bohnen, N.I., 2011, "Age-related striatal dopaminergic denervation and severity of a slip perturbation.," The journals of gerontology. Series A, Biological sciences and medical sciences, vol.66, no.9, pp. 980-5, 21746736.

Brach, J.S., McGurl, D., Wert, D., Vanswearingen, J.M., Perera, S., Cham, R., and Studenski, S., 2011, "Validation of a measure of smoothness of walking.," The journals of gerontology. Series A, Biological sciences and medical sciences, vol.66, no.1, pp. 136-41, 20923910.

Chambers, A.J., Sukits, A.L., McCrory, J.L., and Cham, R., 2011, "Differences in geriatric anthropometric data between DXA-based subject-specific estimates and non-age-specific traditional regression models.," Journal of applied biomechanics, vol.27, no.3, pp. 197-206, 21844608.

Chambers, A.J., Sukits, A.L., McCrory, J.L., and Cham, R., 2010, "The effect of obesity and gender on body segment parameters in older adults.," Clinical biomechanics (Bristol, Avon), vol.25, no.2, pp. 131-6, 20005028.

Mahboobin, A., Cham, R., and Piazza, S.J., 2010, "The impact of a systematic reduction in shoe-floor friction on heel contact walking kinematics-- A gait simulation approach.," Journal of biomechanics, vol.43, no.8, pp. 1532-9, 20170922.

Bohnen, N.I., Muller, M.L., Kuwabara, H., Cham, R., Constantine, G.M., and Studenski, S.A., 2009, "Age-associated striatal dopaminergic denervation and falls in community-dwelling subjects.," Journal of rehabilitation research and development, vol.46, no.8, pp. 1045-52, 20157861.

Kong, P.W., Hostler, D., Suyama, J., and Cham, R., 2009, "Effect of wearing thermal protective clothing on functional balance in male firefighters," Medicine & Science in Sport and Exercise, vol.41, no.5, p. 547.

Moyer, B.E., Redfern, M.S., and Cham, R., 2009, "Biomechanics of trailing leg response to slipping - evidence of interlimb and intralimb coordination.," Gait & posture, vol.29, no.4, pp. 565-70, 19196513.

VanSwearingen, J.M., Perera, S., Brach, J.S., Cham, R., Rosano, C., and Studenski, S.A., 2009, "A randomized trial of two forms of therapeutic activity to improve walking: effect on the energy cost of walking.," The journals of gerontology. Series A, Biological sciences and medical sciences, vol.64, no.11, pp. 1190-8, 19643842.

Wyszomierski, S.A., Chambers, A.J., and Cham, R., 2009, "Knee strength capabilities and slip severity.," Journal of applied biomechanics, vol.25, no.2, pp. 140-8, 19483258.

Cham, R., Studenski, S.A., Perera, S., and Bohnen, N.I., 2008, "Striatal dopaminergic denervation and gait in healthy adults.," Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale, vol.185, no.3, pp. 391-8, 17973106.

Beschorner, K., and Cham, R., 2008, "Impact of joint torques on heel acceleration at heel contact, a contributor to slips and falls.," Ergonomics, vol.51, no.12, pp. 1799-813, 18937108.

Cham, R., Perera, S., Studenski, S.A., and Bohnen, N.I., 2007, "Striatal dopamine denervation and sensory integration for balance in middle-aged and older adults.," Gait & posture, vol.26, no.4, pp. 516-25, 17196819.

Baker, N.A., Cham, R., Cidboy, E., Cook, J., and Redfern, M.S., 2007, "Digit kinematics during typing with standard and ergonomic keyboard configurations," International Journal of Industrial Ergonomics, vol.37, pp. 345-55.

Baker, N.A., Cham, R., Cidboy, E.H., Cook, J., and Redfern, M.S., 2007, "Kinematics of the fingers and hands during computer keyboard use.," Clinical biomechanics (Bristol, Avon), vol.22, no.1, pp. 34-43, 17052825.

Chambers, A.J., and Cham, R., 2007, "Slip-related muscle activation patterns in the stance leg during walking.," Gait & posture, vol.25, no.4, pp. 565-72, 16876417.

Cook, J.R., Baker, N.A., Cham, R., Hale, E., and Redfern, M.S., 2007, "Measurements of wrist and finger postures: a comparison of goniometric and motion capture techniques.," Journal of applied biomechanics, vol.23, no.1, pp. 70-8, 17585179.

Bohnen, N.I., and Cham, R., 2006, "Postural control, gait, and dopamine functions in parkinsonian movement disorders.," Clinics in geriatric medicine, vol.22, no.4, 797-812, vi, 17000336.

Koontz, A.M., McCrory, J.L., Cham, R., Yang, Y., and Wilkinson, M., 2006, "Rehabilitation Biomechanics," in Wiley Encyclopedia of Biomedical Engineering, M. Akay, ed., John Wiley and Sons Inc., Hoboken, NJ.

Cham, R., and Redfern, M.S., 2004, "Gait adaptations during load carrying on level and inclined surfaces," Occupational Ergonomics, vol.4, pp. 11-26.

Cham, R., and Redfern, M.S., 2004, "Leg and Foot - Flooring and Standing Comfort Section 8.2," in Working Postures and Movements - Tools for Evaluation and Engineering, D. Chaffin, N. Delleman, and C. Haslegrave, eds., CRC Press LLC, pp. 224-238.

Redfern, M.S., and Cham, R., 2004, "Leg and Foot - Slips and Falls Section 8.3," in Working Postures and Movements - Tools for Evaluation and Engineering, D. Chaffin, N. Delleman, and C. Haslegrave, eds., CRC Press LLC, pp. 211-224.

Chambers, A., Margerum, S., Redfern, M.S., and Cham, R., 2003, "Kinematics of the foot during slips," Occupational Ergonomics, vol.3, pp. 225-34.

Redfern, M.S., Cham, R., Gielo-Perczak, K., GRONDIN, S.C., Hirvonen, M., Lanshammar, H., and Marpet, M., 2003, "Measuring Slipperiness-Human Locomotion and Surface Factors," in Biomechanics of Slips, W.R. Chang, T.K. Courtney, R. Gronqvist, and M.S. Redfern, eds., Taylor & Francis, pp. 37-65, New York, NY.

Cham, R., and Redfern, M.S., 2002, "Changes in gait when anticipating slippery surfaces," Gait and Posture, vol.15, no.2, pp. 159-71.

Cham, R., and Redfern, M.S., 2002, "Heel contact dynamics during slip events on level and inclined surfaces," Safety Science, vol.40, no.7-8, pp. 559-76.

Cham, R., Moyer, B.E., and Redfern, M.S., 2002, "Whole body biomechanics of responses to slip events," XXVIIème Congrès de la Société de Bioméchanique, Archives of Physiology and Biochemistry Volume 110, p. 21, Valenciennes, France.

Moyer, B.E., Cham, R., and Redfern, M.S., 2002, "Slip anticipation effects on ground reaction forces," IVth World Congress of Biomechanics, Calgary, AB.

Cham, R., and Redfern, M.S., 2001, "Effect of flooring on standing comfort and fatigue," Human Factors, vol.43, no.3, pp. 381-91.

Cham, R., and Redfern, M.S., 2001, "Lower extremity corrective reactions to slip events," Journal of Biomechanics, vol.34, no.11, pp. 1439-45.

Redfern, M.S., Cham, R., Gielo-Perczak, K., Gronqvist, R., Hirvonen, M., Lanshammar, H., Marpet, M., Pai, Y.C., and Powers, C., 2001, "Biomechanics of slips," Ergonomics, vol.44, no.13, pp. 1138-66.

Redfern, M.S., and Cham, R., 2000, "The influence of flooring on standing comfort and fatigue," American Industrial Hygiene Association Journal,, vol.61, no.5, pp. 700-8.

Cham, R., and Moyer, B.E., "Introducing ADAMS, a mechanical system simulation software, to bioengineering students," Proceedings of the American Society for Engineering Education Annual Conference and Exposition, Montreal, Quebec.

Cham, R., and Redfern, M.S., "Adjustments in gait biomechanics on potentially slippery floors," National Occupational Injury Research Symposium, Pittsburgh, PA.

Cham, R., BERGA, S.L., and Redfern, M.S., "Whole body postural responses to slips," International Conference on Slips, Trips, and Falls 2007: From Research to Practice, Hopkinton, MA, 08/2007.

Cham, R., Moyer, B.E., and Redfern, M.S., "Whole body biomechanics of responses to slips," IVth World Congress of Biomechanics, Calgary, AB.

Cham, R., Musolino, M., and Redfern, M.S., "Heel contact dynamics during slip events," Human Factors and Ergonomics Society Congress, pp. 514-517, San Diego, CA.

Cham, R., Studenski, S.A., Perera, K., and Bohnen, N.I., "Aging-related striatal dopaminergic denervation, balance and gait in healthy adults," The 2nd International Congress on Gait and Mental Function, Amsterdam, The Netherlands.

Beschorner, K., Redfern, M.S., Sandrian, P.N., and Cham, R., "Do vestibular inputs trigger upper body responses during a slip," North American Congress on Biomechanics, Ann Arbor, MI.

Chambers, A., and Cham, R., "Anticipation of slippery floors: Muscle onsets and co-contraction of the stance leg," IVth World Congress of Biomechanics, Cleveland, OH.

Chambers, A., McCrory, J.L., Sukits, A.L., and Cham, R., "Anthropometric parameters in the elderly: a DXA-based study," North American Congress on Biomechanics, Ann Arbor, MI.

Coley, B., Lenze, E.J., Perera, K., Studenski, S.A., VanSwearingen, J.M., and Cham, R., "Fear of falling, its psychological components and slip-warning induced gait adaptations in older adults with mild mobility impairments," Aging Annual Research Day, Pittsburgh, PA.

Moyer, B.E., Redfern, M.S., and Cham, R., "Bilateral lower extremity response to unexpected slips," National Occupational Injury Research Symposium, Pittsburgh, PA.

Redfern, M.S., and Cham, R., "Utilizing biomechanics to prevent slips and falls," IVth World Congress of Biomechanics, Calgary, AB.

VanSwearingen, J.M., Perera, K., Brach, J.S., Cham, R., Rosano, C., and Studenski, S.A., "A Randomized trial of two forms of therapeutic activity to improve walking: effect on the energy cost of walking," Aging Annual Research Day, Pittsburgh, PA.

2014, "Falls, a Human Factors Perspective," Bioengineering Seminar, College of Engineering & Applied Science (CEAS), University of Wisconsin-Milwaukee.

Cham, R., 2013, "Balance Recovery from External Perturbations in Special Populations," Department of Veterans Affairs Rehabilitation Research & Development Center of Excellence for Limb Loss Prevention and Prosthetic Engineering, Seattle, WA.

Cham, R., 2013, "How Do We Maintain Balance, with a Focus on the Role of Vision," Department of Ophthalmology (Dana Center), John Hopkins University, Baltimore, MD.

Publication   Role
 
Human Factors
 
Associate Editor