Physical Ergonomics and Human Factors最新文献

{"title":"Impact of remote work on ergonomic risk in Peruvian companies during COVID-19","authors":"Wilmer Atoche, Jorge Wam, Akio Murakami, Percy Mesias","doi":"10.54941/ahfe1002609","DOIUrl":"https://doi.org/10.54941/ahfe1002609","url":null,"abstract":"The COVID-19 pandemic has forced to most organizations to implement remote work as a viable option to continue working. Worldwide this is the normal current situation, and Peru has not been the exception to this issue. However, the lack of adequate readiness to manage this working modality has resulted in the appearance of musculoskeletal discomfort. The prevalence and severity of this health condition increase as more time has passed since the onset of this situation. This readiness includes both, having adequate space and furniture at home, as well as having healthy posture and habits.In this study we will analyze the impact that remote work has had on people's ergonomics and how different factors influence it. We will also present some proposed actions to adapt the remote workplace to reduce the incidence on this health condition, under de understanding that this situation will continue as part of the new normal for most organizations.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116049056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing a computer-vision model to estimate anatomical joint coordinates during manual lifting tasks","authors":"Chih-Yu Hsiao, Chien-Chi Chang, Ting-Yu Chen, Yi-Ting Lin","doi":"10.54941/ahfe1002615","DOIUrl":"https://doi.org/10.54941/ahfe1002615","url":null,"abstract":"This study developed a Computer-Vision based anatomical joint coordinates estimation model to predict the 3D joint coordinates with the help of Artificial Intelligence image recognition technology during manual lifting tasks based on single camera video inputs. The workflow of the proposed Computer-Vision model includes 2D joint detection and 3D joint reconstruction. The 3D joint error is calculated based on the Euclidean distance between the predicted 3D joint coordinates from the CV-based method and the corresponding joint coordinates of the ground truth from the Visual 3D TM skeletal model. The results indicated that the floor to shoulder lifting height path induced a greater 3D joint error than the floor to knuckle and knuckle to shoulder lifting height paths (p-value = 0.01). The 3D joint error of the hand was the largest than the other estimated joints. This study verified that the proposed Computer-Vision model could predict 3D joint points. Therefore, while the marker-based motion tracking system is inapplicable, the model can be used as an alternative solution for predicting lifting motion.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127348721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating Ergonomics, Biomechanics, and Driving Behavior in a Virtual Environment: Developing a Transactional Framework","authors":"P. Maghelal","doi":"10.54941/ahfe1002606","DOIUrl":"https://doi.org/10.54941/ahfe1002606","url":null,"abstract":"The World Health Organization identifies road traffic injuries are a global health problem. The Global Status Report on Road Safety 2015 (2015) reported that Urgent action is needed to deal with this health epidemic. This is significant because, it is predicted that without addressing this issue head-on, traffic crashes are predicted to become the seventh leading cause of death by 2030. the Sustainable Development Agenda 2030 proposed to reduce the global deaths and injuries occurring from road traffic crashes to half by 2030 (WHO). It in acknowledged that major cause of traffic accidents is a human error related to bad driving behavior or fatigue and drowsiness. Hence, the human factor in transportation design should be a great concern to many transportation researchers (Sanjaya and Sya’bana, 2017). Although human factors have been analyzed through assessment of speed, driving behavior, reaction time, and overall cognitive assessment of environment, transportation research in general has neglected ergonomic study of humans in general (Sanjaya and Sya’bana, 2017) and in particular to understand road traffic crashes. Motion analysis is related to one branch of biomechanics called kinematics, which is the accurate measurement of human motion geometry (Knudson, 2007). Virtual Reality (VR) devices offer the natural solution for inexpensive and compact driving simulation, maintaining a high degree of the immersion feeling.Several studies have evaluated the physiological response to driving using a driving simulator, including measures such as HR variability (HRV), EDA, electromyography (EMG) of the anterior tibialis or trapezius muscle and electroencephalography (EEG). Several driving conditions contribute to differences in signals such as braking, mental workload or physical fatigue (Eudavea and Valencia, 2017). Vehicle operators must rapidly assess changes in vehicle stability and adjust body position in order to maintain vehicle control as they negotiate various road networks and types. Simulation can safely replicate changes in vehicle center of mass, and the operator’s biomechanical responses to these changes can be measured (Jennison et al 2017). However, studies related to human factors and driving have either analyzed the likelihood of traffic injuries (Petridou and Moustaki, 2001) or analyzed the physiological responses to driving behavior independently such as eye tracking (Kasneci, E., et al 2017), ECG and EMG (Eudavea and Valencia, 2017); and postural markers (Jennissen, et al 2017). A comprehensive framework to analyze the driving behavior in virtual simulator and assessing its impact on human physics remains a gap to the best of our knowledge.This research therefore investigates human impact and impact on humans of driving behavior using virtual reality. This study develops a theoretical framework to comprehensively assess the personal, situational and environmental factors that impacts driving behavior and its integration within virtual","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128494606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How do the antagonistic muscles contract during modulating the output force?","authors":"Michihiko Fukunaga, Ryoga Fujioka, Yuta Kawasaki","doi":"10.54941/ahfe1003041","DOIUrl":"https://doi.org/10.54941/ahfe1003041","url":null,"abstract":"Muscle forces or joint loads during daily living are important data for designing assistive devices or interfaces. Since it is difficult to measure them, they are usually calculated by static or dynamic simulations. However, such simulation requires some assumptions to solve the statically indeterminate problem, which is, the number of muscles is larger than the number of the static or dynamic conditions. One reason for the indetermination is the simultaneous contraction of the antagonist muscle. Antagonist muscles are considered to be exerted to increase the stiffness of the joint, however, it is not used as the condition to solve the indeterminate problem yet, because there is no quantitative evidence. We have assumed that the antagonist would contract during modulating the output force sensitively. Although we already confirmed the assumption by simulation, the experimental support to show the validation had been lacking. Therefore, we performed the experiment to confirm the assumption using the upper limb. Test subjects were asked to grasp a handle with a force sensor and push/pull it; by maximum force, about half of the maximum force, and the half force by monitoring the output of the force sensor with inputting some unpredictable external force. EMGs of the biceps and triceps brachii were measured. As a result, the antagonist was exerted only in the condition of monitoring the force to modulate the output. Our future plan is to confirm the relation between the magnitude of the antagonist exertion and the sensitivity to modulate the output force.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127514723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of risk factors of upper-limb musculoskeletal disorders in a fish processing industry","authors":"Diogo Cunha dos Reis, Antônio Renato Pereira Moro","doi":"10.54941/ahfe1002601","DOIUrl":"https://doi.org/10.54941/ahfe1002601","url":null,"abstract":"A large number of studies show that awkward postures and repetitive hand and wrist movements contribute to the development of work-related musculoskeletal disorders (WMSDs). To effectively prevent these problems, there is a need for precise and quantitative knowledge about the relation between exposure and effect. In most epidemiological studies of disorders of the upper limbs, information about exposure is too limited or imprecise. Moreover, the exposure often involves several dimensions, and therefore it is necessary to use reliable methods to obtain trustworthy risk estimates. Therefore, the aim of this study was to evaluate the risks in relation to repetitive movements of the upper limbs of workers, as well as analyze the effects of a reduced work pace on the risk levels in a fish processing industry. The study was conducted in a Brazilian fish processing industry with 1,900 workers, who were divided into two work shifts. The OCRA checklist was used to assess 10% of the total workforce during work tasks. The 13 main work tasks (homogeneous groups) of the productive sector were analyzed. The occupational repetitive actions performed by workers were 81.5 ± 19.2 per minute, representing 10 points on the OCRA scale (0 to 10 point scale). The average score of the OCRA checklist was 18.4 ± 2.9 (moderate risk). Considering the five risk categories proposed by the OCRA method, 12 tasks were deemed moderate risk (92%) and 1 low risk level (8%). Due to the predominance of the highly repetitive movements of the upper limbs in fish processing work, and previous studies suggesting a reduced work pace to prevent UL-WMSDs, simulations of a pace with very low risk levels were carried out utilizing the OCRA checklist. By conducting these simulated interventions, it was possible to reduce the risk of UL-WMSDs to very low levels in all tasks by only decreasing the work pace (-42.8 ± 17.7%). These results suggest that most of the tasks carried out by workers were classified as moderate risk, predisposing workers to a greater probability of developing UL-WMSDs (10.8 to 21.5%) than the population that was not exposed. Simulations of a reduced work pace showed the effectiveness of this organizational measure in lowering the risk of UL-WMSDs.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130375600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Influence of Lifting Horizontal Distance Measurement Error on NIOSH Lifting Equation Assessment Outcomes","authors":"K. Hafez","doi":"10.54941/ahfe1002610","DOIUrl":"https://doi.org/10.54941/ahfe1002610","url":null,"abstract":"Low back injuries are becoming increasingly costly due to the compensation costs and lost days of work. Most of these injuries are linked to manual material handling (MMH) activities. Several ergonomic assessment methods are available to assess the risk factors and determine the risk level for a given MMH job. The National Institute for Occupational Safety and Health (NIOSH) Lifting Equation is the most popular and frequently used ergonomic assessment method to assess MMH jobs. The load weight and horizontal distance are the most significant low back pain risk factors in such jobs. Errors in the measurements of load horizontal distance may influence the risk level obtained from the NIOSH Lifting Equation assessment method depending on the weight of the load being handled. Measurements of the horizontal distance variable measured by novice college students were used to examine NIOSH Lifting Equation sensitivity to the horizontal distance measurement errors with respect to the load weight. The results showed that even though errors in the horizontal distance measurements influenced the resulted lifting index values, that did not influence the resulting NIOSH Lifting Equation risk assessment outcomes for almost all lifting conditions.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"428 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116538995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Changes in Lactate After the Completion of Repetitive Cycle Exercises with and without Compression Arm Sleeves","authors":"Amber Rohrer, D. Conde, Samuel Montalvo, Manuel Gomez, Jennica Juarez, G. Ibarra-Mejía","doi":"10.54941/ahfe1002617","DOIUrl":"https://doi.org/10.54941/ahfe1002617","url":null,"abstract":"Occupational compression sleeves are commonly used to relieve pain in the upper and lower extremities. Anecdotal data agree on the benefits of using compression sleeves while performing physical work. The purpose of this study was to assess the effects of wearing compression sleeves on the upper limbs on blood lactate concentration while completing a physically demanding activity. This study included six college-age participants from the University of Texas at El Paso. Anthropometric measurements were taken before the beginning of the study. Afterward, each participant’s basal capillary blood lactate level was established by averaging lactate concentration from three consecutive days. Capillary blood samples were taken from the participant’s earlobe, and lactate concentration (mmol/L) was assessed using the Lactate Plus Lactate Analyzer (Nova Biomedical). After obtaining all the baseline measurements, each participant completed six simulated work sessions, one with sleeves and another without sleeves, at an intensity of 25 Watts, 50 Watts, and 75 Watts a cadence of 60 RPM, and 10 minutes of duration. All participants rested for at least 72 hours between sessions to prevent muscular fatigue effects of lactate concentrations. The use of compression sleeves showed an average reduction of lactate concentration of 0.2 mmol/L. This study shows the potential benefits of wearing compression sleeves while performing activities involving the upper limbs by helping prevent lactate accumulation, a common indicator of muscular effort.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130919139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ergonomics, Health and Safety Challenges in the Construction Industry and the Role of Industry 4.0","authors":"Simamnkele Ngxesha, C. Deacon, J. Smallwood","doi":"10.54941/ahfe1003031","DOIUrl":"https://doi.org/10.54941/ahfe1003031","url":null,"abstract":"Construction is a physically demanding process, and its activities entail exposure to a range of health and safety (H&S) and ergonomics hazards and risks. Inadequate H&S and ergonomics in turn negatively impact the health and wellbeing of workers and overall project and business performance. Given these realities and the persistence of H&S and ergonomics hazards and risks, a quantitative study was conducted to interrogate the related issues and evolve a response, including the potential of Industry 4.0 (4IR) technologies to contribute to an improvement in related performance. The study included members of the Association of Construction Health and Safety Management (ACHASM) who completed a self-administered questionnaire. The findings indicate: industry is still focused on the traditional parameters of cost, productivity, and time; workers are exposed to H&S and ergonomics hazards and risks; H&S- and ergonomics-related performance impact on overall project and business performance, and 4IR technologies have the potential to contribute to improving H&S- and ergonomics-related performance. Conclusions include: the construction process and its activities entail exposure to ergonomic hazards and risks; the construction process and its activities are physically demanding and militate against the health and wellbeing of workers; H&S plays a synergistic role in overall organisational and project performance, and there is a low level of awareness of the potential of 4IR technologies to improve H&S and ergonomics performance. Recommendations include: the holistic benefits arising from optimum H&S and ergonomics should be documented; designers should consider the impact of design, details, and specifications on construction H&S and ergonomics; contractors should interrogate the methods adopted to undertake construction activities to mitigate hazards and risks, and awareness with respect to the potential of 4IR technologies to contribute to improving H&S and ergonomics performance should be raised.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125339798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Different Intervention Methods on Recovery of Exercise-Induced Muscle Fatigue","authors":"Yi-Yang Chen, Zhanxun Dong, Zhang Xingqiang","doi":"10.54941/ahfe1002602","DOIUrl":"https://doi.org/10.54941/ahfe1002602","url":null,"abstract":"The aim of this study is to study the effects and differences of different recovery methods such as passive break (PB), active break (AB), and vibration break (VB) on muscle performance recovery after muscle fatigue. The biceps brachii (BBM), which is prone to fatigue during exercise, was taken as the object to study. 10 healthy males were recruited to conduct the experiment. After the experiment, One-Way Repeated Measures ANOVA was used to compare the difference of muscle performance index (MVC, RMS, MF) between groups (PB, AB, VB) at different time points (pre-fatigue, post-fatigue, and post-recovery). JASA method was also used to analyze the muscle recovery effect. Results show 1-minute AB is more effective for muscle fatigue recovery between exercise sets than 1-minute VB after effects.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"1816 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129719874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Failure Event Virtual Learning Method that Replaces Field Experience and Its Effectiveness Measurement","authors":"Yusaku Okada, Takafumi Aoyagi","doi":"10.54941/ahfe1003033","DOIUrl":"https://doi.org/10.54941/ahfe1003033","url":null,"abstract":"Its known that 95 % of occupational accidents are caused by unsafe human behavior. Therefore, in order to prevent occupational accidents, various human resource education is implemented in each company, but due to the rut that accompanies continuation, many of them are only aimed at preventing serious accidents in steady state. Furthermore, since it takes time and manpower to conduct education, there is also a problem that these educational methods are not effectively utilized in the field. For example, in recent years, a method of supporting risk prediction using VR in high-place work has been considered, but it costs a lot of money to introduce it, and people who have little experience in the first place have the problem that it feels like a game. Merely continuing such a stereotyped education will not improve learning through experience, and it will be difficult to develop outstanding human resources with awareness. Furthermore, for those who have little experience in the field, even if they acquire knowledge through classroom lectures and group work, it is difficult to use it in the field and predict danger. Developing experienced and excellent human resources who can notice on-site is an urgent issue for the future of the company. Therefore, in this research, by investigating various conventional educational methods and sorting out their strengths and weaknesses, we will clarify the reasons why these educational methods are not being used in the field, improve the weaknesses, and improve the actual field. We propose a failure event virtual experience-based l learning method that replaces the field experience.In this study, we decided to measure the effect of the proposed learning method from the degree of awareness in the accident prevention activities carried out in Japanese companies. The reason for this is that in order to further improve the effectiveness of current safety education, it is most practical to measure awareness during activities that are actually carried out in the field, and it is not possible to measure with paper tests or questionnaires. Therefore, based on the characteristics of on-site workers, we decided to examine methods to improve their awareness and willingness to participate in safety activities. Furthermore, we decided to conduct an analysis based on an evaluation experiment to see if the subject's awareness improved by receiving the proposed educational method prior to the safety activities.","PeriodicalId":130337,"journal":{"name":"Physical Ergonomics and Human Factors","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133364982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}