D. Treaster - Academia.edu (original) (raw)

Papers by D. Treaster

Research paper thumbnail of CBR-D Tactical Decision Aid (DECAID) Identification and Analysis of Predictive Human Performance Models and Data Bases for Use in a Commander's CBR-D Decision Aid (DECAID)

: Battelle, Columbus is in the process of developing the high-level function specification for th... more : Battelle, Columbus is in the process of developing the high-level function specification for the Navy Training Systems Center. The purpose of this training system is to provide naval officers with training on the effective conduct of tactical operations under Chemical/Biological/Radiation-Defense (CBR-D) conditions. One of the areas of need is a review of existing models and data bases which might support the training system simulation. This document provides a review of the literature with an intensive review of the following models: Human Reliability, NURA, VENM, DAWN, Task Time Multiplier, PDGRAM, TCORE, CWTSAR, NUSSE II, and TSARDOSE. Recommendations are provided for a Source/Path/ Receiver methodology to incorporate the models. Human Performance Abstracts and Modeling Abstracts are also provided. Keywords: DECAID (Tactical Decision Aid), Chemical threat, Human performance assessment, Heat effects on human performance, War game modeling, Data bases, Human reliability, Time and...

Research paper thumbnail of Model Validation, Sensitivity Analysis, and Utilization with Micro SAINT: A Case Study

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 1990

Research paper thumbnail of Measurement of Pressure Distributions as a Function of Seating Parameters

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 1986

This study examines the effect of seat pan and backrest angles on the distribution of seating pre... more This study examines the effect of seat pan and backrest angles on the distribution of seating pressures. Experimental equipment and data analysis which allow continuous measurement, quantification and analysis of seating pressures on the seat pan and backrest are described. It was found that the seat and backrest angles affected the distribution of pressure on both the seat pan and backrest. The results indicate that increasing the backrest angle was more effective in relieving areas of high pressure than increasing the seat pan angle.

Research paper thumbnail of A Biomechanical Assessment of Alternate Keyboards Using Tendon Travel

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 2000

Research paper thumbnail of Commander's CBR-D Decision Training Aid (DECAID) demonstration model and design refinement. Final report, February 1988July 1989

Chemical, Biological, and Radiological Defense (CBR-D) training has been identified by the fleet ... more Chemical, Biological, and Radiological Defense (CBR-D) training has been identified by the fleet as deficient insofar as it has been dealt with as an independent topic, not closely interrelated with the overall shipboard mission that may be taking place in the CBR environment. The CBR-D area is unique in that the defensive measures (i.e., closing up the ship and outfitting the crew in protective clothing) cause nearly as much mission degradation as would an attack itself. Shipboard Damage Control Assistants need sophisticated training to be able to effectively weigh the risks associated with employing CBR defense measures, and to make appropriate choices consistent with ship mission. Effective risk-management training is made especially difficult due to the fact that no experienced mentors are avialable who have experienced Naval operations in a CBR-D environment. The Damage Control Assistant course of instruction currently teaches established CBR-D doctrine and procedures in a clas...

Research paper thumbnail of Commander's CBR-D Decision Training Aid (DECAID) Demonstration Model and Design Refinement

... July 12, 1989 XTIS A AI DTIC TAB Unannounced 0 Justification by BY Distribution/ Availability... more ... July 12, 1989 XTIS A AI DTIC TAB Unannounced 0 Justification by BY Distribution/ Availability Codes Donald Eldredge .vniI and/or Julie Hartigan Dist Special Delia Treaster John A. Staob A I Louis Tijerina I BATTELLE 505 King Avenue Columbus, OH 43201-2693 I I Page 5. ...

Research paper thumbnail of Gender differences in prevalence of upper extremity musculoskeletal disorders

Ergonomics, 2004

A literature review was conducted on the current literature base to determine the strength of sup... more A literature review was conducted on the current literature base to determine the strength of support for the hypothesis that women experience higher prevalences of upper extremity musculoskeletal disorders (UEMSDs) than men. Fifty-six articles were reviewed for data on gender differences in frequency, incidence or prevalence rates for musculoskeletal disorders specific to the upper extremities. These articles included both general and working populations. The majority of the studies showed that women had significantly higher incidences of various types of UEMSDs than men. This trend was consistently observed in studies based on self-report or plant/workers compensation records, with and without physical examination, and after adjusting for potential confounders such as age and physical work factors. With men as the referent, the odds ratio (OR) or prevalence ratio (PR) for UEMSDs ranged from 0.85 to 10.05 for self report. For self report combined with physical examination, the OR/PR ranged from 0.66 to 11.4. The OR/PR for carpal tunnel syndrome (CTS) ranged from 0.6 to 2.87 with confounder adjustment. These findings suggest that women do have significantly higher prevalences than men for many types of UEMSDs, even after controlling for the type of data source and confounders such as age or work factors.

Research paper thumbnail of Finger motion, wrist motion and tendon travel as a function of keyboard angles

Clinical Biomechanics, 2000

Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on... more Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on tendon travel and wrist and ®nger joint kinematics for the¯exor digitorum profundus and¯exor digitorum super®cialis. Design. A repeated measures, laboratory study was conducted. Independent variables were three Pitch angles, three Roll angles, three Yaw angles, and three keyboard separation distances. Dependent variables were tendon travel, wrist deviation, wrist and ®nger joint kinematics, and Borg comfort rating. Background. The increased usage of computers and the risk of cumulative trauma disorders have led to the development of alternate keyboards. This study is a biomechanical assessment of several keyboard designs. Methods. Lightweight wrist and ®nger goniometers were used to measure motion of the wrist in three planes, and for three ®nger joints. Fifteen experienced typists (eight women, seven men) typed a standard text on 30 keyboard conditions. Regression equations were used to calculate tendon travel from joint positions. Results. Tendon travel is sensitive to changes in Pitch, Roll and Yaw angles with 13% dierence between the minimal and maximal tendon travel. A¯at keyboard produced more tendon travel than keyboards with greater Pitch and Roll angles. Conclusions. There is a trade-o between wrist and ®nger positions; as the wrist extends more, the ®nger joints¯ex more to compensate. Keyboards imposed dierent trade-os between the wrist and ®nger positions, aecting the overall tendon travel. Relevance Alternate keyboard designs can signi®cantly aect tendon travel and may address reduced repetitiveness in typing by reducing the amount of tendon travel.

Research paper thumbnail of An assessment of alternate keyboards using finger motion, wrist motion and tendon travel

Clinical Biomechanics, 2000

Objective. To assess the biomechanical impact of commercially available alternate keyboard design... more Objective. To assess the biomechanical impact of commercially available alternate keyboard designs. Design. A repeated measures study was conducted in a laboratory setting, with planned comparisons of Pitch, Roll and Yaw angles of the keyboards. Ten keyboard conditions were tested. Dependent measures included tendon travel, wrist deviations, and wrist and ®nger kinematics. Background. Various alternate keyboard designs have recently been introduced, which vary Pitch, Roll and Yaw angles, separation distance between keyboard halves, and include other novel features such as cup-shaped depressions for the keys. Yet little objective research has been conducted regarding the biomechanical implications of these various design features. This study attempts to quantify the keyboard designs in terms of several recognized risk factors associated with cumulative trauma disorders that arise with repetitive typing. Methods. Wrist and ®nger goniometers were used to measure joint motions during a standardized typing task. 15 experienced typists (8 women, 7 men) served as subjects. Regression equations were used to generate estimates of tendon travel. Results. Tendon travel was aected primarily by Pitch but not Roll or Yaw angles while wrist deviations responded to changes in all three angles. Males had signi®cantly greater amount of tendon travel than female subjects; this dierence was only partially accounted for by anthropometry. Dierences in joint motion may have a greater impact on the amount of tendon travel. Conclusions. Alternate keyboard designs can aect tendon travel by as much as 11%. Relevance As various alternate keyboard designs are marketed, quanti®able biomechanical data such as that provided by this study, will help to assess their impact on the risk factors for cumulative trauma disorders.

Research paper thumbnail of Finger motion, wrist motion and tendon travel as a function of keyboard angles

Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on... more Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on tendon travel and wrist and ®nger joint kinematics for the¯exor digitorum profundus and¯exor digitorum super®cialis. Design. A repeated measures, laboratory study was conducted. Independent variables were three Pitch angles, three Roll angles, three Yaw angles, and three keyboard separation distances. Dependent variables were tendon travel, wrist deviation, wrist and ®nger joint kinematics, and Borg comfort rating. Background. The increased usage of computers and the risk of cumulative trauma disorders have led to the development of alternate keyboards. This study is a biomechanical assessment of several keyboard designs. Methods. Lightweight wrist and ®nger goniometers were used to measure motion of the wrist in three planes, and for three ®nger joints. Fifteen experienced typists (eight women, seven men) typed a standard text on 30 keyboard conditions. Regression equations were used to calculate tendon travel from joint positions. Results. Tendon travel is sensitive to changes in Pitch, Roll and Yaw angles with 13% dierence between the minimal and maximal tendon travel. A¯at keyboard produced more tendon travel than keyboards with greater Pitch and Roll angles. Conclusions. There is a trade-o between wrist and ®nger positions; as the wrist extends more, the ®nger joints¯ex more to compensate. Keyboards imposed dierent trade-os between the wrist and ®nger positions, aecting the overall tendon travel. Relevance Alternate keyboard designs can signi®cantly aect tendon travel and may address reduced repetitiveness in typing by reducing the amount of tendon travel.

Research paper thumbnail of Myofascial trigger point development from visual and postural stressors during computer work

Journal of Electromyography and Kinesiology, Jan 4, 2006

The mechanism of musculoskeletal pain underlying low level static exertions, such as those experi... more The mechanism of musculoskeletal pain underlying low level static exertions, such as those experienced during computer work, is poorly understood. It was hypothesized that static postural and visual stress experienced during computer work might contribute to trigger point development in the trapezius muscles, resulting in myofascial pain. A study was conducted to observe the development of myofascial trigger points while 16 female subjects used a computer under conditions of high and low postural and visual stress. Trigger point development was monitored via expert opinion, subject self-report, and electromyographic activity. Only the high visual stress conditions resulted in greater trigger point sensitivity as reported by subjects and the myofascial specialist. Cyclic trends in median frequency of the EMG signal were assessed for the trapezius muscle. When high visual stress was combined with low postural stress condition there were significantly fewer cycles (1.6 cycles) as compared to the condition of low visual and low postural stress (2.8 cycles), and the condition of high visual and high postural stress (3.5 cycles). These significant differences between conditions were found for the right trapezius but not for the left. The findings suggest that high visual stress may be involved in the development of the myofascial pain response.

Research paper thumbnail of Myofascial trigger point development from visual and postural stressors during computer work

Journal of Electromyography and Kinesiology, 2006

The mechanism of musculoskeletal pain underlying low level static exertions, such as those experi... more The mechanism of musculoskeletal pain underlying low level static exertions, such as those experienced during computer work, is poorly understood. It was hypothesized that static postural and visual stress experienced during computer work might contribute to trigger point development in the trapezius muscles, resulting in myofascial pain. A study was conducted to observe the development of myofascial trigger points while 16 female subjects used a computer under conditions of high and low postural and visual stress. Trigger point development was monitored via expert opinion, subject self-report, and electromyographic activity. Only the high visual stress conditions resulted in greater trigger point sensitivity as reported by subjects and the myofascial specialist. Cyclic trends in median frequency of the EMG signal were assessed for the trapezius muscle. When high visual stress was combined with low postural stress condition there were significantly fewer cycles (1.6 cycles) as compared to the condition of low visual and low postural stress (2.8 cycles), and the condition of high visual and high postural stress (3.5 cycles). These significant differences between conditions were found for the right trapezius but not for the left. The findings suggest that high visual stress may be involved in the development of the myofascial pain response.

Research paper thumbnail of CBR-D Tactical Decision Aid (DECAID) Identification and Analysis of Predictive Human Performance Models and Data Bases for Use in a Commander's CBR-D Decision Aid (DECAID)

: Battelle, Columbus is in the process of developing the high-level function specification for th... more : Battelle, Columbus is in the process of developing the high-level function specification for the Navy Training Systems Center. The purpose of this training system is to provide naval officers with training on the effective conduct of tactical operations under Chemical/Biological/Radiation-Defense (CBR-D) conditions. One of the areas of need is a review of existing models and data bases which might support the training system simulation. This document provides a review of the literature with an intensive review of the following models: Human Reliability, NURA, VENM, DAWN, Task Time Multiplier, PDGRAM, TCORE, CWTSAR, NUSSE II, and TSARDOSE. Recommendations are provided for a Source/Path/ Receiver methodology to incorporate the models. Human Performance Abstracts and Modeling Abstracts are also provided. Keywords: DECAID (Tactical Decision Aid), Chemical threat, Human performance assessment, Heat effects on human performance, War game modeling, Data bases, Human reliability, Time and...

Research paper thumbnail of Model Validation, Sensitivity Analysis, and Utilization with Micro SAINT: A Case Study

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 1990

Research paper thumbnail of Measurement of Pressure Distributions as a Function of Seating Parameters

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 1986

This study examines the effect of seat pan and backrest angles on the distribution of seating pre... more This study examines the effect of seat pan and backrest angles on the distribution of seating pressures. Experimental equipment and data analysis which allow continuous measurement, quantification and analysis of seating pressures on the seat pan and backrest are described. It was found that the seat and backrest angles affected the distribution of pressure on both the seat pan and backrest. The results indicate that increasing the backrest angle was more effective in relieving areas of high pressure than increasing the seat pan angle.

Research paper thumbnail of A Biomechanical Assessment of Alternate Keyboards Using Tendon Travel

Proceedings of the Human Factors and Ergonomics Society Annual Meeting, 2000

Research paper thumbnail of Commander's CBR-D Decision Training Aid (DECAID) demonstration model and design refinement. Final report, February 1988July 1989

Chemical, Biological, and Radiological Defense (CBR-D) training has been identified by the fleet ... more Chemical, Biological, and Radiological Defense (CBR-D) training has been identified by the fleet as deficient insofar as it has been dealt with as an independent topic, not closely interrelated with the overall shipboard mission that may be taking place in the CBR environment. The CBR-D area is unique in that the defensive measures (i.e., closing up the ship and outfitting the crew in protective clothing) cause nearly as much mission degradation as would an attack itself. Shipboard Damage Control Assistants need sophisticated training to be able to effectively weigh the risks associated with employing CBR defense measures, and to make appropriate choices consistent with ship mission. Effective risk-management training is made especially difficult due to the fact that no experienced mentors are avialable who have experienced Naval operations in a CBR-D environment. The Damage Control Assistant course of instruction currently teaches established CBR-D doctrine and procedures in a clas...

Research paper thumbnail of Commander's CBR-D Decision Training Aid (DECAID) Demonstration Model and Design Refinement

... July 12, 1989 XTIS A AI DTIC TAB Unannounced 0 Justification by BY Distribution/ Availability... more ... July 12, 1989 XTIS A AI DTIC TAB Unannounced 0 Justification by BY Distribution/ Availability Codes Donald Eldredge .vniI and/or Julie Hartigan Dist Special Delia Treaster John A. Staob A I Louis Tijerina I BATTELLE 505 King Avenue Columbus, OH 43201-2693 I I Page 5. ...

Research paper thumbnail of Gender differences in prevalence of upper extremity musculoskeletal disorders

Ergonomics, 2004

A literature review was conducted on the current literature base to determine the strength of sup... more A literature review was conducted on the current literature base to determine the strength of support for the hypothesis that women experience higher prevalences of upper extremity musculoskeletal disorders (UEMSDs) than men. Fifty-six articles were reviewed for data on gender differences in frequency, incidence or prevalence rates for musculoskeletal disorders specific to the upper extremities. These articles included both general and working populations. The majority of the studies showed that women had significantly higher incidences of various types of UEMSDs than men. This trend was consistently observed in studies based on self-report or plant/workers compensation records, with and without physical examination, and after adjusting for potential confounders such as age and physical work factors. With men as the referent, the odds ratio (OR) or prevalence ratio (PR) for UEMSDs ranged from 0.85 to 10.05 for self report. For self report combined with physical examination, the OR/PR ranged from 0.66 to 11.4. The OR/PR for carpal tunnel syndrome (CTS) ranged from 0.6 to 2.87 with confounder adjustment. These findings suggest that women do have significantly higher prevalences than men for many types of UEMSDs, even after controlling for the type of data source and confounders such as age or work factors.

Research paper thumbnail of Finger motion, wrist motion and tendon travel as a function of keyboard angles

Clinical Biomechanics, 2000

Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on... more Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on tendon travel and wrist and ®nger joint kinematics for the¯exor digitorum profundus and¯exor digitorum super®cialis. Design. A repeated measures, laboratory study was conducted. Independent variables were three Pitch angles, three Roll angles, three Yaw angles, and three keyboard separation distances. Dependent variables were tendon travel, wrist deviation, wrist and ®nger joint kinematics, and Borg comfort rating. Background. The increased usage of computers and the risk of cumulative trauma disorders have led to the development of alternate keyboards. This study is a biomechanical assessment of several keyboard designs. Methods. Lightweight wrist and ®nger goniometers were used to measure motion of the wrist in three planes, and for three ®nger joints. Fifteen experienced typists (eight women, seven men) typed a standard text on 30 keyboard conditions. Regression equations were used to calculate tendon travel from joint positions. Results. Tendon travel is sensitive to changes in Pitch, Roll and Yaw angles with 13% dierence between the minimal and maximal tendon travel. A¯at keyboard produced more tendon travel than keyboards with greater Pitch and Roll angles. Conclusions. There is a trade-o between wrist and ®nger positions; as the wrist extends more, the ®nger joints¯ex more to compensate. Keyboards imposed dierent trade-os between the wrist and ®nger positions, aecting the overall tendon travel. Relevance Alternate keyboard designs can signi®cantly aect tendon travel and may address reduced repetitiveness in typing by reducing the amount of tendon travel.

Research paper thumbnail of An assessment of alternate keyboards using finger motion, wrist motion and tendon travel

Clinical Biomechanics, 2000

Objective. To assess the biomechanical impact of commercially available alternate keyboard design... more Objective. To assess the biomechanical impact of commercially available alternate keyboard designs. Design. A repeated measures study was conducted in a laboratory setting, with planned comparisons of Pitch, Roll and Yaw angles of the keyboards. Ten keyboard conditions were tested. Dependent measures included tendon travel, wrist deviations, and wrist and ®nger kinematics. Background. Various alternate keyboard designs have recently been introduced, which vary Pitch, Roll and Yaw angles, separation distance between keyboard halves, and include other novel features such as cup-shaped depressions for the keys. Yet little objective research has been conducted regarding the biomechanical implications of these various design features. This study attempts to quantify the keyboard designs in terms of several recognized risk factors associated with cumulative trauma disorders that arise with repetitive typing. Methods. Wrist and ®nger goniometers were used to measure joint motions during a standardized typing task. 15 experienced typists (8 women, 7 men) served as subjects. Regression equations were used to generate estimates of tendon travel. Results. Tendon travel was aected primarily by Pitch but not Roll or Yaw angles while wrist deviations responded to changes in all three angles. Males had signi®cantly greater amount of tendon travel than female subjects; this dierence was only partially accounted for by anthropometry. Dierences in joint motion may have a greater impact on the amount of tendon travel. Conclusions. Alternate keyboard designs can aect tendon travel by as much as 11%. Relevance As various alternate keyboard designs are marketed, quanti®able biomechanical data such as that provided by this study, will help to assess their impact on the risk factors for cumulative trauma disorders.

Research paper thumbnail of Finger motion, wrist motion and tendon travel as a function of keyboard angles

Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on... more Objective. This study assessed the impact of keyboard angles (in terms of Pitch, Roll and Yaw) on tendon travel and wrist and ®nger joint kinematics for the¯exor digitorum profundus and¯exor digitorum super®cialis. Design. A repeated measures, laboratory study was conducted. Independent variables were three Pitch angles, three Roll angles, three Yaw angles, and three keyboard separation distances. Dependent variables were tendon travel, wrist deviation, wrist and ®nger joint kinematics, and Borg comfort rating. Background. The increased usage of computers and the risk of cumulative trauma disorders have led to the development of alternate keyboards. This study is a biomechanical assessment of several keyboard designs. Methods. Lightweight wrist and ®nger goniometers were used to measure motion of the wrist in three planes, and for three ®nger joints. Fifteen experienced typists (eight women, seven men) typed a standard text on 30 keyboard conditions. Regression equations were used to calculate tendon travel from joint positions. Results. Tendon travel is sensitive to changes in Pitch, Roll and Yaw angles with 13% dierence between the minimal and maximal tendon travel. A¯at keyboard produced more tendon travel than keyboards with greater Pitch and Roll angles. Conclusions. There is a trade-o between wrist and ®nger positions; as the wrist extends more, the ®nger joints¯ex more to compensate. Keyboards imposed dierent trade-os between the wrist and ®nger positions, aecting the overall tendon travel. Relevance Alternate keyboard designs can signi®cantly aect tendon travel and may address reduced repetitiveness in typing by reducing the amount of tendon travel.

Research paper thumbnail of Myofascial trigger point development from visual and postural stressors during computer work

Journal of Electromyography and Kinesiology, Jan 4, 2006

The mechanism of musculoskeletal pain underlying low level static exertions, such as those experi... more The mechanism of musculoskeletal pain underlying low level static exertions, such as those experienced during computer work, is poorly understood. It was hypothesized that static postural and visual stress experienced during computer work might contribute to trigger point development in the trapezius muscles, resulting in myofascial pain. A study was conducted to observe the development of myofascial trigger points while 16 female subjects used a computer under conditions of high and low postural and visual stress. Trigger point development was monitored via expert opinion, subject self-report, and electromyographic activity. Only the high visual stress conditions resulted in greater trigger point sensitivity as reported by subjects and the myofascial specialist. Cyclic trends in median frequency of the EMG signal were assessed for the trapezius muscle. When high visual stress was combined with low postural stress condition there were significantly fewer cycles (1.6 cycles) as compared to the condition of low visual and low postural stress (2.8 cycles), and the condition of high visual and high postural stress (3.5 cycles). These significant differences between conditions were found for the right trapezius but not for the left. The findings suggest that high visual stress may be involved in the development of the myofascial pain response.

Research paper thumbnail of Myofascial trigger point development from visual and postural stressors during computer work

Journal of Electromyography and Kinesiology, 2006

The mechanism of musculoskeletal pain underlying low level static exertions, such as those experi... more The mechanism of musculoskeletal pain underlying low level static exertions, such as those experienced during computer work, is poorly understood. It was hypothesized that static postural and visual stress experienced during computer work might contribute to trigger point development in the trapezius muscles, resulting in myofascial pain. A study was conducted to observe the development of myofascial trigger points while 16 female subjects used a computer under conditions of high and low postural and visual stress. Trigger point development was monitored via expert opinion, subject self-report, and electromyographic activity. Only the high visual stress conditions resulted in greater trigger point sensitivity as reported by subjects and the myofascial specialist. Cyclic trends in median frequency of the EMG signal were assessed for the trapezius muscle. When high visual stress was combined with low postural stress condition there were significantly fewer cycles (1.6 cycles) as compared to the condition of low visual and low postural stress (2.8 cycles), and the condition of high visual and high postural stress (3.5 cycles). These significant differences between conditions were found for the right trapezius but not for the left. The findings suggest that high visual stress may be involved in the development of the myofascial pain response.