{"title":"An integrated 3D point cloud and 2D image-based approach for generating individualized female prototype pattern","authors":"Shouning Jin , Bingfei Gu","doi":"10.1016/j.ergon.2025.103748","DOIUrl":"10.1016/j.ergon.2025.103748","url":null,"abstract":"<div><div>To promote online garment customization and virtual fitting, how to obtain sufficient body shape data easily and quickly to generate personalized tailoring patterns is still a challenge. In this study, an integrated 3D point-cloud and 2D image-based approach for generating individualized female prototype patterns was proposed, and an automatic pattern generation system based on body height, weight, and images was developed. A feature point recognition method was used to measure 14 body parameters, including the width, thickness, and angles at characteristic body landmarks. Multiple linear regressions between these parameters and the coordinates of 20 pattern measurement points were then performed. For the extracted 2D body parameters, the error for more than 80 % of the samples were within 1 cm by comparing with the 3D measurement data. Moreover, the predicted accuracy of the generated individual patterns reaches 91 % overall, demonstrating the reliability of this system. Therefore, this method can improve the efficacy of automatic garment production, and meet the growing requirements of sustainable development and individualized consumption.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103748"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sergio A. Lemus , Nicholas Siman , Mallory Volz , Jessica Dickson , Eduard Tiozzo , Arlette Perry , Thomas M. Best , Francesco Travascio
{"title":"The effect of elevated body mass index and sex on L5-S1 forces and lower body kinematics during symmetrical manual lifting","authors":"Sergio A. Lemus , Nicholas Siman , Mallory Volz , Jessica Dickson , Eduard Tiozzo , Arlette Perry , Thomas M. Best , Francesco Travascio","doi":"10.1016/j.ergon.2025.103757","DOIUrl":"10.1016/j.ergon.2025.103757","url":null,"abstract":"<div><div>In the U.S., 65 % of workers in the Transport, Warehousing, and Utilities sector meet the body mass index (BMI) criterion for obesity, contributing significantly to work-related musculoskeletal injuries among manual workers. However, recommended weight limits (RWL) for manual lifting tasks are based on the general population, overlooking potential adverse effects of BMI and its interaction with sex. This study examined the impact of BMI and sex on L5-S1 forces and lower body kinematics in 30 adults performing a symmetrical box-lifting task designed in accordance with the National Institute for Occupational Safety and Health (NIOSH) guidelines. L5-S1 compression and shear forces, knee and hip angles, and center of mass displacement were measured. A two-way ANOVA assessed biomechanical differences across BMI classifications and sex, while linear regressions examined BMI correlations. Results showed that BMI significantly influenced L5-S1 forces (p < 0.001), with positive relationships found between BMI and both compression (r<sup>2</sup> = 59.4 %) and shear forces (r<sup>2</sup> = 61.3 %). Kinematic analysis showed that obese participants flexed their hips less and had a greater center of mass displacement than non-obese participants. Female participants exhibited lower spinal loads and greater hip flexion compared to males. Notably, all obese participants exceeded the safety limits at a lifting index of 1, compared to 70 % of overweight and normal-weight participants who also surpassed these limits. These findings expand the understanding of the recommended NIOSH lifting equation (RNLE) as an ergonomic risk assessment tool by incorporating a broader BMI spectrum and its interaction with sex.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103757"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Understanding miners' risk decisions: A multimodal analysis of personality, job burnout, and behavioral responses","authors":"Fangyuan Tian , Weishuai Qiu , Hongxia Li , Ziyi Zhao","doi":"10.1016/j.ergon.2025.103753","DOIUrl":"10.1016/j.ergon.2025.103753","url":null,"abstract":"<div><h3>Background</h3><div>Human factors contribute to 71 % of coal mining accidents, yet the individual causes of unsafe behaviors, especially decision-making, remain underexplored. Previous studies have shown that personality traits and job burnout significantly impact risk-related decision preferences.</div></div><div><h3>Objective</h3><div>This study investigates how miners' personality traits influence decision-making under uncertainty through job burnout dimensions, using subjective and objective multimodal data.</div></div><div><h3>Methods</h3><div>Thirty frontline miners were assessed using personality trait questionnaires and the Maslach Burnout Inventory to classify burnout levels. A Wheel of Fortune gambling experiment under performance pressure was conducted, with eye-tracking technology recording decision behaviors.</div></div><div><h3>Results</h3><div>Personality traits correlate significantly with burnout dimensions. A neuroticism-based model categorizes miners into NH (high risk, high burnout) and NL (low risk, low burnout) groups. PLS-SEM path analysis identifies three significant paths, while hierarchical regression shows personality traits and burnout predict risk preference (C) under uncertainty. Eye-tracking data reveal the NH group exhibits simpler gaze trajectories, fewer fixations, and less attention to key information under pressure compared to the NL group. <strong>Conclusions:</strong> Job Burnout mediates the relationship between personality traits and uncertain decision-making performance. Behavioral differences between NH and NL groups highlight the need for personalized safety management. This study provides theoretical and practical insights into emergency behavior under pressure and supports tailored interventions for miner safety.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103753"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143937126","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Ergonomics evaluation of gestures interaction for the elderly in extended reality","authors":"Yumiao Chen, Ying Hu","doi":"10.1016/j.ergon.2025.103749","DOIUrl":"10.1016/j.ergon.2025.103749","url":null,"abstract":"<div><div>With the intensification of aging in China, the social status and needs of the elderly are becoming increasingly prominent. Extended Reality (XR), as an emerging technology capable of delivering immersive experiences, presents new opportunities to enhance the quality of life for the elderly. Gesture interaction, known for its low learning curve and ease of use, has been widely adopted in XR applications. However, due to cognitive and limb motor decline, the current gestures in XR remain challenging for the elderly. The aim of this study is to establish a set of interaction gestures for the elderly that can be widely used in the XR environment. The study was divided into two phases, combining cognitive and electromyographic (EMG) experiments. During the cognitive experiment, we focused on 8 common XR commands and collected 24 gestures to compare the differences in gesture cognition between elderly and young people. During EMG experiments, we screened out the gestures with lower muscle load, proposed an optimal set of aging-adapted gestures and specify the corresponding interaction guidelines. The results of the study provide practical recommendations for designing interaction gestures that match the psychological and physiological needs of the elderly, aiming to enable them to fully benefit from the welfare brought by XR technologies.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103749"},"PeriodicalIF":2.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Junrui Mao , Shuicheng Tian , Fangyuan Tian , Hongxia Li , Lei Ma , Yajuan Wang
{"title":"The relationship between coal miners’ Big Five personality traits and risk propensity: Evidence from fNIRS","authors":"Junrui Mao , Shuicheng Tian , Fangyuan Tian , Hongxia Li , Lei Ma , Yajuan Wang","doi":"10.1016/j.ergon.2025.103750","DOIUrl":"10.1016/j.ergon.2025.103750","url":null,"abstract":"<div><div>Frequent coal mine accidents are primarily caused by unsafe behaviors among coal miners (hereafter referred to as “miners”), with miners' risk propensity being the key factor driving these behaviors. This study used the Chinese version of the Big Five Inventory-2 to measure personality traits and employed the Balloon Analogue Risk Task as the experimental paradigm. A functional near-infrared spectroscopy (fNIRS) device was used to collect blood oxygenation signals from a specific prefrontal lobe region during miners' participation in the experiment. From a behavioral science perspective, this study clarified the relationship between miners' Big Five personality traits and risk propensity. From a cognitive neuroscience perspective, this study identified the changing patterns of mean relative oxygenated hemoglobin (HbO) concentration and activation levels associated with miners' Big Five personality traits and risk propensity. The results demonstrate that (1) the complex relationships among miners' Big Five personality traits, risk propensity, and risk feedback sensitivity are clarified. (2) Regarding risk propensity and risk feedback sensitivity, statistically significant differences in mean relative HbO concentration and activation levels were identified across channels and regions of interest among miners with high and low levels in each personality dimension. (3) Considering both the characteristics of the Big Five personality traits and the quantitative indicators of fNIRS channels, preliminary theoretical strategies were proposed to enhance miners’ risk propensity at both individual and team levels.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103750"},"PeriodicalIF":2.5,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143882575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Johns , L. Krämer , K. Heinrich , O. El-Edrissi , W. Potthast , U. Glitsch
{"title":"The effects of body asymmetry in load handling with a back supporting exoskeleton on lumbar loading","authors":"J. Johns , L. Krämer , K. Heinrich , O. El-Edrissi , W. Potthast , U. Glitsch","doi":"10.1016/j.ergon.2025.103739","DOIUrl":"10.1016/j.ergon.2025.103739","url":null,"abstract":"<div><div>This study investigated the effects of a passive back support exoskeleton (BSE) on lumbar loading during lifting tasks involving varying levels of asymmetry. Twelve healthy participants completed lifting tasks with different levels of asymmetry (90°, 135°, 180°) with and without the exoskeleton. The exoskeleton's influence on 3D L5/S1 moments and pelvis orientation was assessed. Results demonstrated that the BSE effectively reduced L5/S1 extension moments (5–11 %), regardless of the level of asymmetry. Frontal and transversal plane moments were not directly influenced by the exoskeleton support, but instead reduced due to changes in task execution. This included orienting the pelvis more towards the lifting direction, especially with increasing task asymmetry. The findings suggest that the tested BSE can provide meaningful support during asymmetric tasks, along its one actuated degree of freedom. Adaptations in task execution should be considered when evaluating their feasibility for real-world use. Further research is recommended to validate these effects under field conditions and in combination with user acceptance.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103739"},"PeriodicalIF":2.5,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143873378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Huining Pei , Ziyu Wang , Man Ding , Zhonghang Bai , Hao Gong , Jingru Cao , Yunfeng Chen
{"title":"The effects of light and noise levels and task types on the visual cognitive load of pilots","authors":"Huining Pei , Ziyu Wang , Man Ding , Zhonghang Bai , Hao Gong , Jingru Cao , Yunfeng Chen","doi":"10.1016/j.ergon.2025.103747","DOIUrl":"10.1016/j.ergon.2025.103747","url":null,"abstract":"<div><div>Many environmental factors affect the cognitive load of pilots during flights. The purpose of this study was to investigate the effects of light, noise, and task type on the visual cognitive load of pilots performing cockpit head-up display (HUD) tasks. The researchers recruited 20 participants for eye-tracking experiments and electroencephalography (EEG) experiments. During the experiments, participants completed two tasks (static search and dynamic flight) under three light levels (1, 100, and 200 lx) and three noise levels (55, 85, and 100 dB(A)). The task accuracy, task time, seven eye movements, and the mean amplitudes of the N2 and P3 components of the EEG event-related potentials were recorded. Correlation analysis was used to investigate the relationship between the visual cognitive load and the EEG fluctuations. The results showed that the participants' performance was impaired at a light level of 200 lx and a noise level of 100 dB(A). Their cognitive efficiency was the highest at a light level of 100 lx and a noise level of 55 dB(A). The cognitive load was higher during the dynamic flight task than during the static search.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103747"},"PeriodicalIF":2.5,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Mikoláš Jurda, Martin Čuta, Dominik Černý, Petra Urbanová
{"title":"Body parameters of the Czech adult population: Insights from the A.D.A.P.T. software platform samples","authors":"Mikoláš Jurda, Martin Čuta, Dominik Černý, Petra Urbanová","doi":"10.1016/j.ergon.2025.103711","DOIUrl":"10.1016/j.ergon.2025.103711","url":null,"abstract":"<div><div>Knowledge of body parameters of the population is fundamental for effectively fabricating all products designed to fit the human body. This article presents and discusses the body parameters of the current adult Czech population, as captured in three datasets from 2015 to 2022.</div><div>Anthropometric data for a total of 519 individuals were obtained through a combination of direct anthropometry and measurements taken via 3D models. In accordance with current ISO standards (ISO 7250-1, ISO, 20685-1 + 2), a total of 20 body parameters were measured. The sample was further supplemented by self-reported weight and stature information from 507 Czech individuals. All recorded data were processed into sex- and age-stratified descriptive statistics and compared with older data for the Czech population as well as relevant datasets from other European countries.</div><div>The body parameters of the Czech population were close to those of Central and Northern European populations. At the same time, Czechs systematically and consistently differ in certain specific dimensions, such as tibial height. Our cross-sectional sample further revealed that the secular increase in height dimensions has plateaued in the Czech population. Nevertheless, its past dynamics are still evident in systematic differences between age categories. Such variability should be considered, for example, when designing products intended for individuals in the post-productive age. It is also evident that the population continues to experience a dynamic increase in width and circumference dimensions. This ongoing trend underscores the necessity of regularly updating population data. The research is linked to the creation of the A.D.A.P.T. software platform, which provides free access to the original data and records.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103711"},"PeriodicalIF":2.5,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jared-Isaac Friedel, Justin B. Davidson, Steve L. Fischer
{"title":"Validating the recommended cumulative rest allowance equation for use in workload management","authors":"Jared-Isaac Friedel, Justin B. Davidson, Steve L. Fischer","doi":"10.1016/j.ergon.2025.103746","DOIUrl":"10.1016/j.ergon.2025.103746","url":null,"abstract":"<div><div>The Recommended Cumulative Rest Allowance (RCRA) equation estimates rest requirements based on effort intensity and duty cycle and may be important when optimizing daily workload to maintain productivity without undue muscle fatigue development; however, its validity has not been confirmed. Thus, the purpose of this study was to investigate whether muscle fatigue accumulates when rest time is insufficient according to the RCRA equation, and whether no fatigue occurs in protocols deemed to have sufficient or excess rest. Thirty-two participants performed isometric triceps extensions under three protocols: insufficient rest, sufficient rest, and excess rest for the same total work. Muscle fatigue was assessed by comparing maximum voluntary exertions (MVE) before and after each protocol and investigating amplitude and frequency changes in surface electromyography recorded from the triceps. MVE significantly decreased by an average of 2.4 % after all protocols.</div><div>Participants showed significantly higher EMG amplitudes and lower mean power frequencies over time during the insufficient rest protocol, however, no changes were observed in the sufficient and excess rest protocols. This provides evidence supporting that the RCRA may be a useful tool to optimize workloads in the workplace; however, studies using longer exposure times are necessary to confirm its effectiveness.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103746"},"PeriodicalIF":2.5,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"The impact of individual AI proficiency on human–agent collaboration: Higher sensitivity to discern the comprehension ability of intelligent agents for users with higher AI proficiency levels","authors":"Ruifeng Yu, Xinran Xu, Shuo Peng","doi":"10.1016/j.ergon.2025.103745","DOIUrl":"10.1016/j.ergon.2025.103745","url":null,"abstract":"<div><div>This study explored the impact of individual artificial intelligence (AI) proficiency on task scores, human perceptions of the agent's intelligence and anthropomorphism, trust, and mental workload from the perspective of human–agent collaboration. A 2 (Individual AI Proficiency, between-subjects) <span><math><mrow><mo>×</mo></mrow></math></span> 2 (Intelligent Agent's Comprehension Ability for Human Intentions, within-subjects) mixed experimental design was implemented in a task in which the participants and intelligent agents collaborated to navigate an unknown map. Forty participants participated in this study. The results revealed significant interaction effects between human AI proficiency and the agents' comprehension abilities on human trust, perceived intelligence, and perceived anthropomorphism. Users with higher AI proficiency demonstrated greater trust, perceived intelligence, and anthropomorphism when interacting with intelligent agents that interpreted human intention based on both immediate and previous feedback, compared to intelligent agents based solely on immediate feedback, displaying a higher sensitivity to the change in agents' ability. Additionally, intelligent agents that interpret human intentions based on both immediate and previous feedback significantly reduce users' mental workload compared with those that rely solely on immediate feedback.</div></div>","PeriodicalId":50317,"journal":{"name":"International Journal of Industrial Ergonomics","volume":"107 ","pages":"Article 103745"},"PeriodicalIF":2.5,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143833323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}