W
University of Washington

Peter W Johnson

Peter W Johnson, PhD, MS
Associate Professor, Env. and Occ. Health Sciences (Primary department)
Adjunct Associate Professor, Industrial & Systems Engineering
Peter Johnson, PhD, is an Associate Professor in the Occupational and Environmental Exposure Sciences program, specializing in ergonomics. He earned his Doctorate in Bioengineering from the University of California - Berkeley and has worked as a researcher at the National Institutes of Occupational Health in the United States, Sweden and Denmark. In cooperation with Harvard University, he has developed and validated an exposure assessment system for measuring physical risk factors during computer work; he has worked on two large-scale studies in Sweden measuring and characterizing upper-extremity hazards associated with computer and cell phone use; and is conducting studies evaluating ways to reduce whole body vibration exposures in bus and semi-truck drivers . In addition, has also worked with Microsoft, Hewlett-Packard and Logitech assisting with the design and evaluation of new tablets, notebook computers, keyboards and mice and is conducting work to determine whether kids may benefit from input devices specifically designed to match their smaller stature. Finally, using electrical stimulation of the muscle and a computer activity monitoring program designed to measure mouse button click and keystroke durations, he is working on a project to determine whether systematic, fatigue-related temporal changes in muscle twitch durations match the temporal changes in mouse button-click and keystroke durations as a subject fatigues and recovers from computer work.

Contact Information

Box: 357234
4225 Roosevelt Way NE
Seattle, WA 98195-7234
Tel: 206-221-5240
Fax: 206-616-6240

Links

Affiliations

  • Industrial and Systems Engineering

Research Interests

  • Ergonomics, bioengineering, whole body vibration, computer-related disorders, developing hardware and software technologies for assessing exposures to physical risk factors
  • KEYWORDS: Carpal Tunnel Syndrome; Occupational biomechanics; Office hazards; Repetitive motion disorders; Vibration exposure

In the News

UW Researcher Wins 2010 Ergonomics Professional of the Year Award
Puget Sound Human Factors and Ergonomics Society , 11/24/2010
Keyboards, Desks can be Hazardous to Your Health
School of Public Health News, 09/27/2012

Teaching interests

Ergonomics, Occupational Biomechanics, Treatment of Work-Related Musculoskeletal Disorders, Probability and Statistics.

Education

PhD, Ergonomics, University of California (Berkeley), 1998
MS, Ergonomics, University of California (Berkeley), 1998

Projects

1. Characterizing and Predicting Whole Body Vibration Exposures in Bus Drivers
The goal of this study is to collect whole body vibration (WBV) exposures from metropolitan bus drivers and determine administrative controls (alter speed and/or route of bus, systematically vary type of routes) and/or engineering controls (identify and trigger the need for street repair) can reduce WBV exposures.
2. Randomized Controlled Trial of a Whole Body Vibration Intervention in Truck Drivers
By collecting Whole Body Vibration (WBV) exposure and low back pain symptoms in a group of truck drivers, the goal of this study is to conduct a one-year Randomized Control Trial (RCT) comparing an industry standard air suspension seat (placebo) to a new technology active suspension seat (intervention).
3. Evaluation of Seating Intervention for Heavy Equipment Operators in the Construction Industry
The goal of this study is to collect whole body vibration (WBV) exposures from heavy equipment operator in the construction industry and determine whether new generation semi-active suspension seats reduce WBV relative to the industry standard air suspension seats.
4. Ergonomic Evaluation of Emerging Technologies in the Tree Fruit Industry
The goal of this study is to evaluate the physical exposures associated with the implementation of mobile platforms in apple harvesting activities in Washington state.
5. Evaluating Emerging Computer Input Device Technologies.
Evaluating the physical impacts, performance and subjective preference of emerging computer input device technologies such as tablets, touch interfaces and ultra-thin notebook keyboards. Also evaluating the design requirements to make stature proportional computer input devices for smaller statured users such as children and women.
Selected Publications

BIBLIOGRAPHY

52 Refereed Research Articles (* advisor, ** committee member)

  1. Wahlström J, Svensson J, Hagberg M, and Johnson P. (2000) Working with the computer mouse – differences between work techniques and gender. Scan J Work Environ Health, 26(5): 390 - 397.
  2. Johnson P, Wigaeus Hjelm E, Hagberg M, and Rempel D. (2000) Exposure assessment: measuring and characterizing force exposure during computer mouse use.  Scan J Work Environ Health, 26(5): 398-406. PMID: 11103838
  3. Jonsson P* and Johnson P. (2001)  Effects of pronation and supination on wrist goniometer measurement accuracy. J Appl Ergonomics, 32(6): 599-607.
  4. Ciriello V, Bennie K, Johnson P and Dennerlein J. (2002) Comparison of Three Psychophysical Techniques to Establish Maximum Acceptable Torques of Repetitive Ulnar Deviation. Theoretical Issues In Ergonomic Science, 3(3): 274-284.
  5. Wahlström J, Hagberg M, Johnson P, Rempel D and Svensson J. (2002) Influence of time pressure and verbal provocation on physical load, physiological and psychological reactions during work with computer mouse. Eur J Appl Physiol, 87(3): 257-263.
  6. Johnson P, Jonsson P and Hagberg M.  (2002) Comparison of measurement accuracy between two types of wrist goniometer systems. J Electromyogr Kinesiol, 12(5): 413-420. PMID: 12223175
  7. Adamo DE, Martin BJ, Johnson P. (2002) Vibration-induced muscle fatigue, a possible contribution to musculoskeletal injury. Eur J Appl Physiol, 88(1): 134 - 140. PMID: 12436281
  8. Bennie K, Ciriello V, Johnson P, Dennerlein J. (2002) Changes in the electromyographic activity of the ECU muscle with exposure to repetitive ulnar deviation. Eur J Appl Physiol, 88(1): 5-12.
  9. Dennerlein J, Ciriello V, Bennie K, Johnson P. (2003) Fatigue in the forearm muscles from low-level repetitive ulnar deviation. Amer Ind Hyg Asso J. 64: 799 - 805.
  10. Dennerlein J and Johnson P. (2006) Different computer tasks affect the exposure of the upper extremity to biomechanical risk factors. Ergonomics 49(1): 45-61, 2006. PMID: 16393803
  11. Dennerlein JT and Johnson PW. (2006) Changes in upper extremity biomechanics across different mouse positions in a computer workstation.  Ergonomics 49(14-15): 1456-1469. PMID: 16393803
  12. Russell S, Winnemuller L, Camp J, and Johnson P. (2007) Comparing the results of five lifting analysis tools.  Appl Ergo, 38(1):91-97. PMID: 16867298
  13. Jonsson P*, Johnson P, Hagberg M. (2007) Accuracy, feasibility and validity of using an electrogoniometer for measuring simple thumb movements. Ergonomics 50(5): 647-659.
  14. Chang CH, Amick III BC, Chaumont Menende C, Katz J, Johnson P, Dennerlein JT.  (2007)  Daily computer usage correlated with undergraduate students’ musculoskeletal symptoms. American Journal of Industrial Medicine 50(6):481-488. PMID: 17450542
  15. Task C, Teschke K, Village J, Chow Y, Johnson P, Luong N, Koehoorn M.  (2007) Measuring low back injury risk factors in challenging work environments, an evaluation of cost and feasibility.  American Journal of Industrial Medicine 50(9):687-696. PMID: 17680639
  16. Johnson P. and Blackstone JM* (2007) Children and gender: differences in exposure and how anthropometric differences could be incorporated computer input device design. Scandinavian Journal of Work Environment and Health. Suppl(3): 26-32.
  17. Thomsen GF, Johnson P, Svendsen SW, Kryger AI, Bonde JP. (2007)  Muscle fatigue in relation to forearm pain and tenderness among professional computer users. Journal of Occupational Medicine and Toxicology 2:17. PMID: 18067676
  18. Blackstone JM*, Karr C, Camp C and Johnson P.  (2008)  Physical exposure differences between children and adults when using standard and small computer input devices. Ergonomics, 51(6): 872–889. PMID: 18484401
  19. Trask C, Teschke K, Morrison J, Johnson P, Village J, and Koehoorn M. (2008) How long is long enough? Evaluating sampling durations for low-back EMG assessment.  J Occ Env Hyg. 5(10):664 – 670
  20. Chang C, Johnson P, Katz JN, Eisen EA, Dennerlein J. (2008) A Wide Range of Activity Duration Cutoffs for Integrative Computer Usage-Monitors Provided Unbiased Estimates of Computer Use Duration. J Occ Env Hyg. 5(12):790-796. PMID: 18932082
  21. Chang C, Johnson P, Katz JN, Eisen EA, Dennerlein  J. (2008) Typing keystroke duration changed after submaximal isometric finger exercises. Eur J Appl Physiol. 105(1): 93-101. PMID: 18853179
  22. Won E, Johnson P, Punnett L and Dennerlein JT. (2009) Upper extremity biomechanics in computer tasks differ by gender. J Electromyogr Kinesiol 19(3):428-426.
  23. Smith CK**, Silverstein BA, Fan ZJ, Bao S, Johnson PW. (2009) Job strain and shoulder symptoms among workers.  American Journal of Industrial Medicine. 52(1): 57-68.  PMID: 18942665
  24. Village J, Teschke K, Trask C, Chow Y, Johnson P and Koehoorn M.  (2009) Development and Evaluation of an Observational Exposure Sampling Tool (Back-EST) for Back Injury Risk Factors. Appl Ergo. 40(3): 538-544. PMID: 18950744
  25. Jacobs K, Johnson P, Dennerlein J, Peterson D, Kaufman J, Gold J, Williams W, Richmond N, Karban S, Firn E, Ansong E, Hudak S, Pencina K, Pencina M.  (2009) University Students’ Notebook Computer. Applied Ergo, 40(3):404-409. PMID: 19101663
  26. Teschke K, Trask C, Johnson PW, Chow Y, Village J, Koehoorn M.  (2009) Measuring posture for epidemiology: comparing inclinometry, observations, and self-reports.  Ergonomics.52(9): 1067–1078.
  27. Asundi K, Johnson PW, Dennerlein JT. (2009) Inertia artefacts and their effect on the parameterisation of keyboard reaction forces.  Ergonomics, 52(10): 1259 - 1264.
  28. Adamo D, Kohdaee M, Barringer S, Johnson P, Martin B. (2009) Influence of age on muscle twitch force fatigue induced by intermittent and sustained low mean levels of grip exertions.  Ergonomics, 52(10): 1287–1297.
  29. McLoone H, Jacobsen M, Hegg C, Johnson P. (2009) Design and evaluation of a curved computer keyboard.  Ergonomics, 52(12): 1529 - 1539.
  30. Blood RP* , Ploger JD, Yost MG, Ching  RP, and Johnson PW. (2010) Whole body vibration exposures in metropolitan bus drivers: a comparison of three seats. Journal of Sound and Vibration, 329: 109–120. doi:10.1016/j.physletb.2003.10.071
  31. Crenshaw AG, Komandur S, Johnson PW. (2010) Finger flexor contractile properties and hemodynamics following a sustained submaximal contraction. A study using electrical stimulation and near infrared spectroscopy. Intl J Ind Ergonomics, 40: 153 – 160.
  32. Straker L, Maslem R, Burgess-Limerick R, Johnson P and Dennerlein J. (2010) Evidence-based guidelines for the wise use of computers by children: Physical development guidelines. Ergonomics 53(4): 458-477. (Top downloaded paper in Ergonomics 2010)
  33. Trask C., Teschke K, Morrison J, Village J, Johnson P, Koehoorn M. (2010) Using Observation and Self-report to Predict Mean, 90th Percentile, and Cumulative Low Back Muscle Activity in Heavy Industry Workers.  Annals of Occ Hygiene, 54(5):595-606.  PMID: 20413415
  34. Trask C., Teschke K, Morrison J, Village J, Johnson P, Koehoorn M. (2010) EMG Estimated Mean, Peak, and Cumulative Spinal Compression of Workers in Five Heavy Industries.  Intl J of Ind Ergonomics, 40:448-454. 
  35. Gustafsson E*, Johnson P, Hagberg M. (2010) Thumb postures and physical loads during mobile phone use - young adults with and without musculoskeletal symptoms. J Electromyogr Kinesiol, 20: 127-135. PMID: 19138862
  36. Chang C, Menendez C,  Robertson M, AmickIII B, Johnson PW, del Pino R,Dennerlein JT. (2010) Daily self-reports resulted in information bias when assessing exposure duration to computer use. American Journal of Industrial Medicine, 53(11):1142-1149, PMID: 20632313
  37. Blood RP*, Ploger JD, and Johnson PW. (2010)  Whole body vibration exposures in forklift drivers: a comparison of a mechanical and air-ride seat. Ergonomics, 53 (11): 1385 - 1394.  PMID:20967660
  38. Trask C, Teschke K, Morrison J, Johnson P and Koehoorn M.  (2010) Optimizing Sampling Strategies: Components of Low-Back EMG Variability in Five Heavy Industries.  Journal of Occupational and Environmental Medicine, 67(12): 853-860.
  39. Van Den Wymelenberg K*, Inanici M and Johnsons P. (2010) The Effect of Luminance Distribution Patterns on Occupant Preference in a Daylit Office Environment. Leukos, 7(2), 103-122.
  40. McLoone H, Jacobsen M, Hegg C*, Johnson P.  (2010) User-Centered Design and Evaluation of Microsoft’s Next Generation Fixed-Split Ergonomic Keyboard. Work., 37, 445-456.
  41. Jonsson P*, Johnson PW.Hagnerg M, Forsman M,  (2011) Thumb joint movement and muscular activity during mobile phone texting – a methodological study.  Journal of Electromyography and Kinesiology, 21(2):363-370.
  42. Gustafsson E*, Johnson P, Lindegård A, Hagberg M. (2011) Technique, muscle activity and kinematic differences in young adults texting on mobile phones.  Ergonomics 54(5): 477 – 487.
  43. Blood RP*, Rynell PW, and Johnson PW. (2011) Vehicle design influences whole body vibration exposures: Effect of the location of the front axle relative to the cab.  J Occ Env Hygiene, 8: 6, 364 - 374.  PMID: 21623531
  44. Asundi K, Johnson PW, Dennerlein JT. (in press) Does elevating and tilting the input device support surface affect typing force and postural exposures of the wrist?  Work
  45. Lewis Charlotte and Johnson P. (2012) Whole-body vibration exposure in metropolitan bus drivers. Occupational Medicine.
  46. Johnson P, Ciriello V, Kerin K and Dennerlein J. (2012)  Using electrical stimulation to measure physiological changes in the human extensor carpi ulnaris muscle after prolonged low-level repetitive ulnar deviation. International Journal of Industrial Ergonomics.
  47. Bruno JL, Eijckelhof BHW, Johnson PW, Raina SM, Rynell P, Huysmans MA, van Dieën JH, van der Beek AJ, Blatter BM,  Dennerlein JT.  (in press) Observed Differences in Upper Extremity Biomechanical Exposures Across Computer Activities in a Field Study of Office Workers. Ergonomics.
  48. Thamsuwan O*, Blood RP, Ching RP, Boyle L and Johnson PW. (in press) Whole body vibration exposures in bus drivers: A comparison between a high-floor coach and a low-floor city bus.  International Journal of Industrial Ergonomics.
  49. Kim JH* and Johnson PW.  (in press) Viability of Using Digital Signals from the Keyboard to Capture Typing Force Exposures.  Ergonomics.
  50. Asundi KR, Johnson PW and Dennerlein JT. (in press) Variance in direct measures of typing force and wrist kinematics across hours and days among office computer workers Ergonomics. 
  51. Blood RP*, Rynell PW, and Johnson PW. (in press) Whole body vibration exposures in front loader operators: a comparison of ladder and basket chains.  Safety Science.
  52. Van Driel, R, Johnson P, Callaghan J, Koehoorn  M, Teschke K, Trask C. (in press) Anthropometry-corrected exposure modelling as a method to improve trunk posture assessment with a single inclinometer. Submitted to the Journal of Occupational & Environmental Hygiene

3 Refereed Research Articles Submitted (* advisor, ** committee member)

  1. Ettinger LR, Kincl L, Johnson P, Garfinkel S, Carter C, Karduna AR. Workday Arm Elevation Exposure, a Comparison between Professions. Submitted to the Journal of Occupational & Environmental Hygiene.
  2. Johnson PW, Dennelein J, Lewis C, Rynell P and Blood RP* Whole body vibration exposures in semi-truck drivers: a comparison of an active and passive suspension seat.  Submitted to the Journal of Occupational and Environmental Hygiene.
  3. Odell D and Johnson PW. Evaluation of Flat, Angled, and Vertical Computer Mice. Submitted to International Journal of Industrial Ergonomics.

Other Publications and Book Chapters

  1. Dennerlein J and Johnson P.  Instrumentation for Evaluating Effective Human-Computer System Design, Handbook of Digital Human Modelling for Applied Ergonomics and Human Factors Engineering.
  2. Blood RP and Johnson PW. (2011)  Quantifying whole body vibration exposures in metropolitan bus drivers: an evaluation of three seats. Noise and Vibration Worldwide, 42 (2): 22 - 28.

134 Other non-refereed published scholarly publications (* advisor, ** committee member)

  1. Grant K, Galinsky T, and Johnson P.  (1993) Use of the actigraph for objective quantification of hand/wrist activity in repetitive work.  Proceedings of the Human Factors and Ergonomics Society's 37th Annual Meeting,  Santa Monica, CA: HFES, 720-724.
  2. Johnson P, Dropkin J, Hewes J, and Rempel D.  (1993)  Office ergonomics: motion analysis of computer mouse usage.  Proceedings of the American Industrial Hygiene Conference and Exposition., Fairfax, VA: AIHA, 12-13.
  3. Johnson P, Tal R, Smutz P, and Rempel D.  (1993)  Computer mouse designed to measure finger forces during operation.  Proceedings of the IEEE Engineering in Medicine and Biology Society 15th Annual International Conference., San Diego, CA: IEEE EMBS, 1404-1405.
  4. Armstrong T, Martin B, Rempel D, and Johnson P.  (1994)  Mouse input devices and work-related upper limb disorders.  Proceedings of the 4th International Scientific Conference on Working With Display Units, Milan, Italy, (C) 20-22.
  5. Rempel D, Johnson P, Smutz P, and Tal R.  (1994)  Finger forces measured during computer mouse use.  Proceedings of the 4th International Scientific Conference on Working With Display Units, Milan, Italy, (C) 28-29.
  6. Johnson P, Smutz W, and Rempel D.  (1994)  Fingertip forces measured during computer mouse operation: a comparison of pointing and dragging.  Proceedings of the 12th Congress of the International Ergonomics Association, Toronto, ON: IEA. 208 - 210.
  7. Morelli D, Johnson P, and Reddell C.  (1995)  A comparison of user preferences between keyboards while performing "real" work: a comparison of “alternative” and standard keyboards.  Proceedings of the Human Factors and Ergonomics Society's 39th Annual Meeting, Santa Monica, CA: HFES, 361 - 365.
  8. Johnson P, Dennerlein J, Armstrong T, and Rempel D.  (1995)  A graphical computer model simulating forces in the extrinsic finger flexor tendons during static work.  5th International Symposium on Computer Simulation in Biomechanics, Jyväskylä, Finland, 16 -17.
  9. Johnson P, Lehman S, and Rempel D.  (1995)  Measuring low frequency fatigue with 2 hertz electrical stimulation. Part II: Muscle fatigue results.  IEEE Engineering in Medicine and Biology Society 17th Annual International Conference, Montreal, Canada: IEEE EMBC, 1211-1212.
  10. Johnson P, Lehman S, and Rempel D. (1995)  Measuring low frequency fatigue with 2 hertz electrical stimulation. Part I: Stimulus-related potentiation effects.  IEEE Engineering in Medicine and Biology Society 17th Annual International Conference, Montreal, Canada: IEEE EMBC, 1207-1208.
  11. Armstrong T, Martin B, Franzblau A, Rempel D, and Johnson P.  (1995)  Mouse input devices and work-related upper limb disorders.  Working With Display Units 94, Elsevier Science, 375-380.
  12. Johnson P, Lehman S, and Rempel D.  (1995)  A new technique for measuring fatigue in the finger flexor muscles resulting from low-force work.  Proceedings of the 2nd International Congress on Prevention of Work-related Musculoskeletal Disorders, Montreal, Canada: PREMUS, 298-300.
  13. Johnson P, Lehman S, Tal R, and Rempel D.  (1996)  Measuring fingertip forces applied to the computer mouse: a comparison of mouse with and without drag-lock.  Proceedings of the 25th International Congress on Occupational Health, Stockholm, Sweden: ICOH, 245.
  14. Johnson P, Lehman S, and Rempel D.  (1996)  Does muscle fatigue occur during prolonged computer mouse use?  Proceedings of the Nordic Satellite Symposium on Risk Assessment for Musculoskeletal Disorders under the auspices of ICOH ‘96, National Institute for Occupational Health, Copenhagen, Denmark, 47-48.
  15. Johnson P, Lehman S, and Rempel D.  (1996)  Measuring muscle fatigue during prolonged computer mouse use.  IEEE Engineering in Medicine and Biology Society 18th Annual International Conference, Amsterdam, Holland: IEEE EMBS: 1454-1455.
  16. Johnson P, Rempel D, and Hagberg M. (1997)  Developing and evaluating force sensing mice for epidemiological study.  Proceedings of the 13th Congress of the International Ergonomics Association, Tampere, Finland: IEA (5): 47-49.
  17. Johnson P, Lehman S, and Rempel D. (1997)  Does muscle fatigue result from computer keyboard use?  Proceedings of the 13th Congress of the International Ergonomics Association, Tampere, Finland: IEA (4): 58-60.
  18. Johnson P, Hagberg M, Wigaeus Hjelm E, and Rempel D. (1998)  Exposure assessment: measuring and characterizing the forces applied to the computer mouse.  Proceedings of the 3rd International  Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, Helsinki, Finland: PREMUS: 120.
  19. Jonsson P and Johnson P. (2000)  Comparison of measurement accuracy between two wrist goniometer systems.  Proceedings of the12th Conference of the European Society of Biomechanics, Dublin, Ireland: ESB: 435.
  20. Dennerlein J and Johnson P. (2000) Exposure Assessment tools for physical risk factors associated with computer work. Proceedings of the Human Factors and Ergonomics Society's 44th Annual Meeting,  Santa Monica, CA: HFES (6): 688.
  21. Wahlström J*, Svensson J, Johnson P and Hagberg M. (2000) Computer mouse work – differences between work methods and gender. Proceedings of the Human Factors and Ergonomics Society's 44th Annual Meeting,  Santa Monica, CA: HFES (1): 632-635.
  22. McLoone H, Adams E, and Johnson P. (2000)  Infrared thermography to qualify and quantify interaction between hand and computer mouse and its relationship to comfort.  Proceedings of the Human Factors and Ergonomics Society's 44th Annual Meeting,  Santa Monica, CA: HFES (6): 47-50.
  23. Johnson P, McLoone H, Adams E, and Arms S. (2000) Developing miniature force-sensing technologies for measuring the forces applied to a computer mouse.  Proceedings of the Human Factors and Ergonomics Society's 44th Annual Meeting,  Santa Monica, CA: HFES (6): 629-632.
  24. Johnson P, Quass N, McLoone H, and Perry D. (2000)  The visualization and analysis of forces applied to a six-axis force/torque sensor using labview.  Proceedings of the 46th International Instrumentation Symposium, Research Triangle Park, NC ISA:191 - 197.
  25. Wahlström J*, Hagberg M, Johnson P, Rempel D and Svensson J. (2001) Physiological effects of time pressure and when working with a computer mouse. X2001 – Exposure Assessment in Epidemiology and Practice, Göteborg, Sweden, Arbete och Hälsa (10): 472-474.
  26. Johnson P, Jonsson P, Hagberg M. (2001) Comparison of two goniometers for measurement accuracy during pronation and supination. X2001 – Exposure Assessment in Epidemiology and Practice, Göteborg, Sweden, Arbete och Hälsa (10): 411-413.
  27. Jonsson P* and Johnson P. (2001) Differences in measurement accuracy between two wrist goniometers systems. X2001 – Exposure Assessment in Epidemiology and Practice, Göteborg, Sweden, Arbete och Hälsa (10): 144-146.
  28. Johnson P, Jonsson P, Hagberg M. (2001) Differences in measurement accuracy between two goniometers during pronation and supination. Proceedings of the 4th International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, Amsterdam, The Netherlands, PREMUS: 172.
  29. Dennerlein J, Johnson P, Bennie K, and Ciriello V. (2001) The ratio of 20-50 Hz muscle forces decreases with repetitive work. Proceedings of the 4th International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, Amsterdam, The Netherlands: PREMUS: 161.
  30. Martin B, Khodaee M, Adamo D, Baringer S, Werne R, and Johnson P. (2001) Intermittent and sustained hand grip contractions and low frequency muscle fatigue. Proceedings of the 4th International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, Amsterdam, The Netherlands, PREMUS: 147.
  31. Bennie K, Ciriello V, Johnson P, and Dennerlein J. (2001) ECU EMG power spectrum decreases with repetitive work. Proceedings of the 4th International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, Amsterdam, The Netherlands, PREMUS: 145
  32. Thomsen G, Johnson P, Svendsen S, and Bonde J. (2001) Forearm muscle fatigue in computer workers with and without arm pain. Proceedings of the 4th International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, Amsterdam, The Netherlands, PREMUS: 32.
  33. Dennerlein JT, Johnson P, Punnett L. Exposure Assessment of Physical Risk Factors during Computer Work, NORA Conference, Washington DC, 2001
  34. Johnson P and Zalk D. (2002) Exposure Assessment in Occupational Hygiene and Ergonomics: Learning from Each Other. Proceedings of the Vth International Scientific Congress of the International Occupational Hygiene Association, Bergen, Norway, IOHA: Abstract Number H3.
  35. Johnson P and Jensen C. (2002) Do patterns of muscle use influence muscle fatigue? Proceedings of the 14th congress of the International Society of Electromyography and Kinesiology, Vienna, Austria: ISEK: 177-178.
  36. Becker T, Johnson P and Dennerlein T. (2002) The development of a keyboard force platform. Proceedings of the IVth World Congress of Biomechanics, Calgary, Canada, WCB: Abstract Number 1304.
  37. Johnson P, Jonsson P, and Hagberg M. (2002) Measurement differences between two wrist goniometers during pronation and supination. Proceedings of the IVth World Congress of Biomechanics, Calgary, Canada, WCB: Abstract Number 586.
  38. Johnson P, Townsend C and Arms S. (2002) The testing and validation of a fast response inclinometer. Proceedings of the IVth World Congress of Biomechanics, Calgary, Canada, WCB: Abstract Number 1107 .
  39. Bennie K, Ciriello V, Johnson P, and Dennerlein J. (2002) EMG changes of the ECU muscle with exposure to repetitive work. Proceedings of the Human Factors and Ergonomics Society's 46th Annual Meeting, Santa Monica, CA: HFES: 1086-1089.
  40. Dennerlein J, DiMarino M, Becker T and Johnson P. (2002) Wrist and shoulder muscle activity changes across computer tasks.  Proceedings of the Human Factors and Ergonomics Society's 46th Annual Meeting,  Santa Monica, CA: HFES: 1129-1132.
  41. Dennerlein J, Chemor-Ruiz A, Johnson P, Sommerich C.  (2003)  a proposed taxonomy for describing computer input device usage. Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  42. Dennerlein JT, Becker T, Johnson P, Reynolds C, Picard R.  (2003) Frustrating computers users increases exposure to physical factors. Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  43. Dennerlein JT, Won E, Barrero L, Ibboston J, Johnson P.  (2003) Computer mouse location affects upper extremity posture, EMG, and force.  Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  44. Chemor A, Barrero L, Becker T, Johnson P and Dennerlein J.  (2003)  Distribution of keyboard and mouse use across different computer tasks. Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  45. McLoone H, and Johnson P. (2003) Hand support in the design of computer mouse design: evaluation of performance and users’ perceived comfort and preference. Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  46. Ibbotson J, Becker T, Johnson P, and Dennerlein T. (2003)  A comparison of the EVA between three computer tasks. Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  47. Ibbotson J, Yost M and Johnson P. (2003)  Using various exposure analyses to explore differences in computer mouse usage patterns.  Proceedings of the 15th Congress of the International Ergonomics Association, Seoul, Korea.
  48. Dennerlein J, and Johnson P. (2003) Positions of the computer mouse within a thousand workstations.  Proceedings of the Human Factors and Ergonomics Society's 47th Annual Meeting, Santa Monica, CA: HFES.
  49. Won E, Punnett L, Becker T, Johnson P and Dennerlein J. (2003) Gender differences in exposure to physical risk factor’s during identical computer tasks.  Proceedings of the Human Factors and Ergonomics Society's 47th Annual Meeting, Santa Monica, CA: HFES.
  50. Dennerlein JT, Johnson P. Measuring physical risk factors of musculoskeletal disorders during computer work, NORA Conference, Washington DC, 2003
  51. Russell S, Winnemuller L, Camp J, and Johnson P. (2004) Comparing the results of five lifting analysis tools.  Proceedings of the Human Factors and Ergonomics Society's 48th Annual Meeting, Santa Monica, CA: HFES.
  52. Blackstone J*, and Johnson P. (2004) Comparison of Child and Adult Anthropometry: Considerations for Input Device Design.  Proceedings of the Human Factors and Ergonomics Society's 48th Annual Meeting, Santa Monica, CA: HFES.
  53. Johnson P. Ibbotson-Brown J and Dennerlein J (2004) Comparison of two EVA-based methods for characterizing force exposures during computer work. Tijdschrift voor toegepaste Arbowetenschap, Eindhoven, The Netherlands (Supplement 2): 33.
  54. Chang C, Johnson , Ibbotson J and Dennerlein D. (2004) Measuring typing forces and keystroke performance. Tijdschrift voor toegepaste Arbowetenschap, Eindhoven, The Netherlands (Supplement 2): 34.
  55. McLoone H, Hegg C and Johnson P. (2004) Evaluation of Microsoft’s comfort curve keyboard. Proceedings of the Human Factors and Ergonomics Society's 49th Annual Meeting, Santa Monica, CA: HFES, 1359 - 1363.
  56. Chang CH, Johnson P, Dennerlein JT.  (2005) Relating Worker Fatigue with Keyboard Forces and Typing Performance, HCI International, Las Vegas, NV, 2005
  57. Chang CH, Johnson P, Dennerlein JT. (2006) Using a Software as an Exposure Assessment Device to Measure and Detect Computer Users’ Muscle Fatigue, NORA 2006 Symposium, Washington, D.C., 274-275.
  58. Johnson PW, Dennerlein JT, Chang CH. (2006) Turning the Computer Mouse and keyboard into Exposure Assessment Devices. NORA 2006 Symposium. Washington DC, 265-267.
  59. Johnson PW and Ploger J. (2006)  A portable measurement system for the assessment of time weighted and impulsive exposures to whole body vibration.  Proceedings of the First American Conference on Human Vibration, NIOSH pub 2006-140, 90.
  60. Johnson PW and Wahlström J. (2006) Upper extremity disorders among computer users: the roles of force and gender.  Proceedings of the 16th Triennial Congress of the International Ergonomics Association, Maastricht, The Netherlands: Abstract Number 791.
  61. Blackstone J* and Johnson PW. (2006) Size, strength and physical exposure differences between adult and child computer users. Proceedings of the 16th Triennial Congress of the International Ergonomics Association, Maastricht, The Netherlands: Abstract Number 213.
  62. Trask C, Koehoorn M, Village J, Morrison J, Teschke K, Johnson PW. (2006) Evaluating full-shift low back EMG and posture measurements for epidemiological studies. Proceedings of the 16th Congress of the International Ergonomics Association, Maastricht, The Netherlands: Abstract Number 130.
  63. Trask C, Koehoorn M, Village J, Johnson PW, Teschke K.  (2006) Modeling determinants of working exposures and exposure variability.  Proceedings of the 16th Congress of the International Ergonomics Association, Maastricht, The Netherlands: Abstract Number 699.
  64. Chang CH, Menéndez CC, Amick BC III, Katz, JN, Robertson M, Johnson PW, Dennerlein JT. (2006) Increased computer usage is associated with the reporting of MSD symptoms in 27 University Students.  Proceedings of the 16th Triennial Congress of the International Ergonomics Association, Maastricht, The Netherlands: Abstract Number 797.
  65. Lin Y* and Johnson PW. (2006) Does low and high frequency stimulation itself cause muscle fatigue: implication for measurement.  Proceedings of the 18th Congress of the International Society of Electromyography and Kinesiology: 109.
  66. Odell D and Johnson P. (2007) Evaluation of a mouse designed to improve posture and comfort. Proceedings of the Working with Computer Systems Conference, Stockholm, Sweden.
  67. Johnson P and Blackstone J.* (2007) Kids and gender: differences in exposure and how anthropometric differences could be incorporated computer input device design. Proceedings of the Working with Computer Systems Conference, Stockholm, Sweden. CONFERENCE PAPER AWARD
  68. Chang CH, Johnson P, Dennerlein JT. (2007) Finding the inactivity threshold to accurately estimate computing time with software. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 13. STUDENT ABSTRACT AWARD
  69. Gustafsson E*, Johnson PW, Hagberg M. (2007) Physical exposures during mobile phone use – young adults with and without musculoskeletal symptoms. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 18.
  70. Johnson P and Dennerlein JT (2007) Computer input devices: gender and stature based difference in exposure. Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 6.
  71. Johnson P, Ploger J, Trask C, Village J, Chow Y, Koehoorn M and Teschke K. (2007) Longitudinal exposure assessments of low back posture in five heavy industries in British Columbia. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 239.
  72. Jonsson P*, Johnson P, Hagberg M. (2007) Accuracy and feasibility of using an electrogoniometer for measuring simple thumb movements. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 59.
  73. Komandur S**, Johnson P, Chang CH, Dennerlein JT. (2007) How fast does a computer monitoring program need to run to accurately capture keystroke durations? Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 99.
  74. Ploger J and Johnson P. (2007) average and impulsive whole body vibration exposures in metropolitan bus drivers. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 100.
  75. Smith CK**, Silverstein BA, Fan ZJ, Bao S, Johnson PW. (2007) Job strain and incidence of shoulder symptoms among service and manufacturing employees in Washington state. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 196.
  76. Trask C, Koehoorn M, Chow, Y, Village J, Johnson PW, Teschke K.  (2007) Modeling determinants of low back EMG exposure in construction, forestry transportation, warehousing and wood product industries. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 240. STUDENT ABSTRACT AWARD
  77. Trask C, Koehoorn M, Village J, Johnson PW, Chow, Y, Teschke K.  (2007) Evaluating the efficiency of exposure assessment methods: cost, feasibility, and overcoming challenges in the field. Proceedings of the Sixth International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Boston, MA, 340.
  78. Van Driel R**, Trask C, Chow Y, Village J, Johnson P, Koehoorn M, Teschke K. (2007) A comparison between electromyography (EMG) and inclinometer predicted spinal compression. 38th Annual Conference of the Association of Canadian Ergonomists, Toronto, October 2007. FINALIST: BEST MASTER’S STUDENT PAPER AWARD
  79. Teschke K, Johnson P, Trask C, Chow Y, Village J, Koehoorn M. (2007) Measuring posture for epidemiology: Comparing inclinometry, observations, and self-reports. EPICOH 2007, Banff, October.
  80. Blood R,* Ploger J, Johnson PW. (2008)  A comparison of whole body vibration exposure across three different types of bus seats.  Proceedings of the Second American Conference on Human Vibration, NIOSH.
  81. Johnson PW, Blood R*, Ploger J. (2008) A comparison of whole body vibration exposures between low and high floor busses.  Proceedings of the Second American Conference on Human Vibration, NIOSH.
  82. Chang CH, Johnson PW and Dennerlein JT. (2008) Keystroke durations decreased after finger exercises. The 7th International Occupational Hygiene Association International Scientific Conference, Taipei, Taiwan.
  83. Komandur S**, Johnson P, Storch R. (2008) Relation between mouse button click duration and muscle contraction time. Proceedings of the 30th Annual International IEEE EMBS Conference, 2299 - 2310.
  84. Blood R*, Ploger J, Johnson PW, Kazlausky T, Liljelind I, Wahlström J. (2008) Measuring hand arm vibration exposure with a wrist mounted actigraph.  43rd UK Conference on Human Responses to Vibration.
  85. Johnson PW, Ploger J, Blood R*. (2008) Whole body vibration exposures in forklift operators: comparison of a mechanical and air-ride seat.  43rd UK Conference on Human Responses to Vibration.
  86. Blood R*, Ploger J, Johnson PW. (2008) Whole body vibration exposures in bus operators: comparison of three seat types.  43rd UK Conference on Human Responses to Vibration.
  87. Johnson P. and Sauvage S. (2008) Evaluation of the Logitech Wave keyboard.  Proceedings of the Human Factors and Ergonomics Society's 52nd Annual Meeting, Santa Monica, CA: HFES, 1030-1034.
  88. Trask C, Teschke K, Village J, Morrison J, Johnson P, Koehoorn M. (2009) Mean, Peak, and Cumulative Spinal Compression Estimates in Five Heavy Industries. 39th Annual Conference of the Association of Canadian Ergonomists.
  89. Blood R*, Ploger J, Johnson PW.  (2009) Does seat type affect a forklift driver’s whole body vibration exposures: a comparison of a mechanical and air-ride seat. 4th International Conference on Whole Body Vibration, Montreal, CA
  90. Crenshaw A, Komandur S, Johnson P. (2009) Contractile properties and hemodynamics for a sustained submaximal contraction studied with electrical stimulation and NIRS. Medicine and Science in Sports and Exercise, Volume 41:5.
  91. Johnson PW and Blood R*.  (2009) Issues surrounding the collection and analysis of data using ISO 2631-5. 2nd International Conference on Human Vibration Exposure, measurement and tests. Boden, Sweden, 75-80.
  92. Johnson P, Komandur and Storch R. (2009). Are fixed computer input device activation forces suitable for all users? Proceedings of the 17th Triennial Congress of the International Ergonomics Association, Beijing, China.
  93. Chang CH, Amick III BC, Chaumont Menende C, Robertson M, Johnson P, Dennerlein JT (2009) Self-reported computer use duration biased the exposure-response relationship of musculoskeletal symptoms. Proceedings of the 17th Triennial Congress of the International Ergonomics Association, Beijing, China.
  94. . Van Driel R**, Koehoorn M, Johnson P, Calahan J, Teschke K. (2009) A Comparison of trunk posture measurements: a motion capture system and a new data-logging Inclinometer.  Proceedings of the 17th Triennial Congress of the International Ergonomics Association, Beijing, China.
  95. Gustafsson E*, Johnson PW, Hagberg M. (2009) Differences in physical load and productivity during text entering on mobile phones between young adults with and without musculoskeletal symptoms?   Proceedings of the 17th Triennial Congress of the International Ergonomics Association, Beijing, China.
  96. Komandur S, Johnson P, Storch RL (2009) Relation between Index Finger Width and Hand Width Anthropometric Measures. . Proceedings of the 31st Annual International IEEE EMBS Conference, 1:823-826.
  97. Jacobs K, Hall V, Brownson E, Ansong E, Markowitz J, DiBiccari L, McKinnon M, Steinberg, Alexander Ing S, Wuest E, Johnson P, Dennerlein J. (2009). The Investigation of the notebook computer experience among university 5tudents.  Proceedings of the 17th Triennial Congress of the International Ergonomics Association, Beijing, China.
  98. . Van Driel R**, Koehoorn M, Johnson P, Calahan J, Teschke K. (2009) Posture Measurements: comparison of a Motion Capture System and a New Data-logging Inclinometer.  Proceedings of X2009.
  99. Asundi K, Johnson P, Dennerlein JT. (2009) Force and wrist posture data selection by computer interaction episodes.  Proceedings of X2009 - Sixth International Conference on Innovations in Exposure Assessment.
  100. Asundi K, Johnson P, Dennerlein JT. (2009) Inertial artefacts and their effect on the parameterization of keyboard reaction forces.  Proceedings of X2009 - Sixth International Conference on Innovations in Exposure Assessment.
  101. Jacobs K, Johnson P, Dennerlein J, Peterson D, Kaufman J, Gold J, Williams W, Richmond N, Karban S, Firn E, Ansong E, Hudak S, Pencina K, Pencina M. (2009)  Proceedings of the Human Factors and Ergonomics Society's 53rd Annual Meeting, Santa Monica, CA: HFES.
  102. Blood RP* and Johnson PW. (2010) A comparison of whole body vibration exposures between a cab-over and conventional flat bed truck.  Proceedings of American Industrial Hygiene Conference and Exposition, Denver, CO.
  103. Blood RP*, Rynell PW, and Johnson PW. (2010)  Comparing whole body vibration exposures between a cab-over and conventional truck. Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France,  p 238.
  104. Asundi KR, Johnson PW and Dennerlein JT.  (2010)  Differences in wrist postural dynamics across computer and non-computer tasks among office workers.    Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France,  p 284.
  105. Asundi KR, Johnson PW and Dennerlein JT.  (2010)  Effect of sampling strategies on variability in exposure intensity measures of typing force and wrist postural dynamics during computer work.  Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France, p 282.
  106. Asundi KR, Johnson PW and Dennerlein JT.  (2010)  Effects of workstation configuration on typing force, wrist postures and wrist dynamics.  Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France,  p 283.
  107. Han C*, Dennerlein J, Johnson P and Wang  Y.  (2010)  Can changes in keystroke duration be used to detect when a computer operator is developing muscle fatigue?  Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France,  p. 274.
  108. Johnson P and Cui L*.  (2010)  Health and performance benefits for children when using child-proportional mice and keyboards.  Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France, p 294.
  109. Straker L, Johnson P Dennerlein J and Burgess-Limerick R.  (2010)  Evidence-based physical guidelines for wise use of computers by children.  Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France, p 298.
  110. Eijckelhof BHW,, Huysmans MA, Blatter BM, Bruno JL, Johnson PW, Van Der Beek AJ, Van Dieën JH, Dennerlein JT. (2010) Interactions of biomechanics and psychosocial stressors in relation to the development of MSDs in the modern office: the ‘PROOF’ study protocol.  Proceedings of the Seventh International Scientific Conference on Prevention of Work-Related Musculoskeletal Disorders, PREMUS: Angers, France, p 262.
  111. Johnson P and Cui L*.  (2010)  Postural benefits for children and adults when using the mouse next to a small keyboard.  Proceedings of the Human Factors and Ergonomics Society's 54th Annual Meeting, Santa Monica, CA: HFES, pp 1974-1976.
  112. Johnson P and Hwang S*.  (2010)  Computer input devices — race and gender: is there a mismatch between anthropometry and input device design.  Proceedings of the Human Factors and Ergonomics Society's 54th Annual Meeting, Santa Monica, CA: HFES, pp 1130-1133.
  113. Kim J* and Johnson P.  (2011)  Validation of software-based measures of keystroke durations with external USB-based logger.  Institute of Industrial Engineering 61st Annual Conference and exposition.
  114. Blood R* and Johnson P.  (2011)  Exposure reduction performance of an active vibration cancelling semi-truck seat.  Institute of Industrial Engineering 61st Annual Conference and exposition.
  115. Blood R* and Johnson P.  (2011)  Whole Body Vibration in Snow Removal Loader Operations: Do Traction Chains Cause Low Back Pain? Proceedings of American Industrial Hygiene Conference and Exposition, Portland, OR.
  116. Kim J* and Johnson P.  (2011)  Validation of a Software Program for Measuring Fatigue-Related Changes in Keystroke Durations. Proceedings of the 33rd Annual International IEEE EMBS Conference, pp 7397 – 7400.
  117. Blood R*, Dennerlein J, Lewis L, Rynell P and Johnson P.  (2011)  Evaluating whole-body vibration exposure engineering control options in a population of semi-truck drivers: Comparison of an active and passive suspension seat.  Proceedings of the Human Factors and Ergonomics Society's 55th Annual Meeting, Santa Monica, CA: HFES, pp 1750-1754..
  118. Hughes M*, Aulck L. and Johnson P.  (2011)  Comparison of typing forces between long and short travel keyboards.  Proceedings of the Human Factors and Ergonomics Society's 55th Annual Meeting, Santa Monica, CA: HFES, pp 954-957.
  119. Hughes E and Johnson P.  (2011)  Child Computer Use and Anthropometry.  Proceedings of the Human Factors and Ergonomics Society's 55th Annual Meeting, Santa Monica, CA: HFES., pp 1716-1719.
  120. Johnson P and Blood R. (2011)  Evaluating whole-body vibration exposure engineering control options in a population of semi-truck drivers: Comparison of an active and passive suspension seat.  38th Annual Conference of the Association of Canadian Ergonomists, Abstract# 516.
  121. Kim J* and Johnson P. (2012). Can Digital Signals from the Keyboard Capture Force Exposures during Typing?.Proceedings of the 18th Triennial Congress of the International Ergonomics Association, Recife, Brazil. FINALIST: BEST STUDENT PAPER AWARD
  122. Bruno Garza JL, Eijckelhof BHW, Johnson PW, Raina SM, Rynell, P, Huysmans, MA, van Dieën JH, van der Beek AJ, Blatter BM, and Dennerlein JT. (2012). Developing a framework for assessing biomechanical exposures during computer work in the field: The effect of computer activities on biomechanical exposures. Proceedings of the 18th Triennial Congress of the International Ergonomics Association, Recife, Brazil.
  123. Hughes E and Johnson PW. (2012)  Children computer mouse use and anthropometry Proceedings of the 18th Triennial Congress of the International Ergonomics Association, Recife, Brazil.
  124. Johnson PW and Blood RP. (2012) Whole Body Vibration Exposures: Comparison of a passive and active vibration cancelling semi-truck seat.  Proceedings of the 30th International Congress on Occupational Health, Cancun, Mexico,SS063-1.
  125. Jonsson PMG, Rynell PW, Hagberg M, Johnson PW. (2012) Exposures to whole body vibration and mechanical shocks in bus drivers in Sweden.  Proceedings of the 30th International Congress on Occupational Health, Cancun, Mexico, SS063-2.
  126. Johnson PW and Blood RP.  (2012) The effects of seat and vehicle design on whole body vibration exposures and potential health costs.  CARWAH 2010 Conference.
  127. Crenshaw AG, Pettersson L and Johnson PW. (2012) Onset and recovery of muscle hemodynamic and contractile properties of males and females following a submaximal isometric contraction. Experimental Biology.
  128. Aulck L*,Blood R and Johnson PW. (2012)  Whole body vibration energy transmission in a passive suspension and electromechanically active suspension seat.  Proceedings of the Fourth American Conference on Human Vibration.
  129. Burgel B, Johnson PW and Rempel D. (2012)  Whole body vibration in taxicabs in San Francisco.  Proceedings of the Fourth American Conference on Human Vibration.
  130. , Blood R*, Lewis C, Thamsuwan O, Rynell P and Johnson P.  (2012)  Whole body vibration exposures among professional bus drivers: a comparison of low floor bus designs. Proceedings of American Industrial Hygiene Conference and Exposition.
  131. Thamsuwan O*, Blood R*, Lewis C, Rynell P, and Johnson PW. (in press)  Whole Body Vibration Exposure and Seat Effective Amplitude Transmissibility of Air Suspension Seat in Different Bus Designs.  Proceedings of the Human Factors and Ergonomics Society's 56th Annual Meeting, Santa Monica, CA.
  132. Bruno Garza JL, Eijckelhof BHW, Johnson PW, Raina SM, Rynell, P, Huysmans, MA, van Dieën JH, van der Beek AJ, Blatter BM, and Dennerlein JT. (in press). During computer use, participants with high levels of overcommitment experience higher muscle activity levels.  Proceedings of the Human Factors and Ergonomics Society's 56th Annual Meeting, Santa Monica, CA.
  133. Kim JH*, Aulck L, Harper-Avera C, Bartha M and Johnson P. (in press) Are there Differences in Force Exposures and Typing Productivity between touchscreen and conventional keyboard? Proceedings of the Human Factors and Ergonomics Society's 56th Annual Meeting, Santa Monica, CA.
  134. Blood R, Rynell P, Johnson PW. (in press)  Evaluating the influence of traction chains on whole-body vibration exposures among professional loader operators.  Proceedings of the Fourth American Conference on Human Vibration.
  135. Thamsuwan O*, Blood R*, Lewis C, Rynell P, and Johnson PW. (in press)  Whole body vibration exposures and seat effective amplitude transmissibilities of air suspension seat in different bus designs.  Proceedings of the Fourth American Conference on Human Vibration.
  136. Kim JH* and Johnson P. (in press) Typing Force and Performance Variability between Conventional and Virtual Keyboards. Institute of Industrial Engineering 62nd Annual Conference and exposition.
  137. Kim JH* and Johnson P.  (in press)  Are there differences in muscle activity, subjective discomfort, and typing performance between virtual and conventional keyboards?  Proceedings of the 34th Annual International IEEE EMBS Conference.
Review date: 
5/22/2012