Applied Ergonomics最新文献

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Effectiveness of a comprehensive health promotion intervention for managing risk factors associated with musculoskeletal disorders in Iranian housewives: A four-arm randomized controlled trial

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-03-04 DOI: 10.1016/j.apergo.2025.104489

Samaneh Norouzi , Sedigheh Sadat Tavafian , Rosanna Cousins , Hamidreza Mokarami

Full-time housework includes long hours of musculoskeletal effort that can lead to intense pain, poor workability, stress and reduced quality of life. A comprehensive intervention that included biomechanical and psychosocial educational training was designed and evaluated using a four-arm randomized control trial. A total of 160 housewives recruited from a musculoskeletal disorders clinic were randomly assigned to one of four intervention groups: control, biomechanical, psychosocial and comprehensive (biomechanical and psychosocial). Measures were collected before the seven weekly training sessions, immediately after, and three months and six months later. There were significant sustained improvements compared to baseline in the biomechanical and the psychosocial groups for six risk factors, and all seven risk factors in the comprehensive group providing evidence of independent contributions from biomechanical and psychosocial training approaches. This supported the overarching hypothesis that a comprehensive educational intervention can effectively reduce risk factors associated with musculoskeletal disorders in full-time housewives.

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引用次数: 0

Effects of DC-powered pistol grip tool location and orientation on operator upper extremity stiffness and damping

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-03-03 DOI: 10.1016/j.apergo.2025.104491

Raj Arjun, Naveen Chandrashekar

In automotive assembly lines, workers routinely used DC-powered pistol grip tools for the installation of threaded fasteners. The stiffness and damping offered by the hand-tool system dictates the handle displacement due to the reaction torque. The aim of the study was to predict the typical ranges of stiffness and damping offered by the upper extremity in different wrist orientations and locations while operating a pistol-grip hand tool. The hand-tool system was represented using a single degree-of-freedom torsional model and a deterministic approach was adopted to identify the system parameters. Tightening tasks were executed by ten experienced hand-tool operators at three torque levels (5 Nm, 7.5 Nm, and 10 Nm) and at four different fastener locations corresponding to varying wrist orientations. At 5 Nm, 7.5 Nm, and 10 Nm torques, the mean operator stiffnesses were 645 N/m, 879.5 N/m, and 1019 N/m respectively with a mean damping being 22.88 N/m, 15.14 N/m and 12.38 N/m respectively. The stiffness coefficients were different between wrist positions but not the damping coefficients. The research demonstrates the approach to model pistol grip hand tool operation and determine the stiffness and damping parameters. This approach could be used for determining optimal torque ranges and positions to minimize rotary tool handle displacement due to reaction torque, thereby reducing the risk of injury.

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引用次数: 0

Development, validation, acceptability and usability of a device-based system to measure sit-stand desk usage

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-03-02 DOI: 10.1016/j.apergo.2025.104490

Genevieve N. Healy , Alejandro Melendez-Calderon , Sami Kaab , Noah Bongers , Katherine A. Heseltine , Chan Hi Yue , George Thomas , Bronwyn K. Clark

We describe the development and testing (across three studies) of an open-source device designed to measure sit-stand desk usage: the Desk Positioning System (DPS). Accuracy of the DPS was assessed under prescribed (Study 1) and free-living (Study 2; video criterion) conditions, across multiple desk-types. Study 3 assessed usability and acceptability in the short-term (1-week) and longer-term (5-weeks).

Results

In Study 1, the DPS was 100% accurate at identifying most conditions (presence at desk 59/72 conditions, detecting desk height 166/168). In Study 2 (n = 10) the DPS demonstrated high accuracy (F1>0.95) and precision (>0.98) against the criterion (7866 observations). Study 3 participants (n = 23) reported high device acceptability in both the short- (mean [sd] 4.4/5 [SD 0.4]) and longer-term (4.6/5 [0.5]). Usability was above the 68-score industry benchmark at the short- (72.4/100 [14.2]) and longer-term (74.7/100 [18.5]).

Conclusion

The DPS may provide an accurate, acceptable and useable way of understanding sit-stand desk usage.

我们介绍了一种用于测量坐立办公桌使用情况的开源设备--办公桌定位系统（DPS）的开发和测试（涉及三项研究）。在规定（研究 1）和自由生活（研究 2；视频标准）条件下，对 DPS 的准确性进行了评估，涉及多种办公桌类型。研究 3 对短期（1 周）和长期（5 周）的可用性和可接受性进行了评估。结果在研究 1 中，DPS 对大多数情况的识别准确率为 100%（在办公桌前 59/72 次，检测办公桌高度 166/168 次）。在研究 2（n = 10）中，DPS 的准确度（F1>0.95）和精确度（>0.98）均高于标准（7866 次观察）。研究 3 的参与者（n = 23）表示，设备在短期（平均值 [sd] 4.4/5 [SD 0.4]）和长期（4.6/5 [0.5]）的可接受性都很高。短期（72.4/100 [14.2]）和长期（74.7/100 [18.5]）可用性均高于 68 分的行业基准。

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引用次数: 0

Dynamics of COVID-19 crisis management in hospitals and its long-term effects: An analysis using organizational resilience

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-03-01 DOI: 10.1016/j.apergo.2025.104486

Nora Oufi , Cecila De la Garza , Adelaide Nascimento

This empirical and qualitative study focuses on COVID-19 crisis management in a French hospital, analyzing it from the perspective of organizational resilience to understand its evolution over time. The study identifies adaptation factors during pandemic management, supported by success factors, and it also identifies difficulty factors associated with resilience. These factors are analyzed at the different waves of the pandemic to understand the evolution of organizational resilience across various crisis management temporalities. The results highlight how certain factors initially considered as resilience capabilities, evolve to become vulnerability factors of the sociotechnical system, in particular due to their impacts on healthcare personnel.

引用次数: 0

Understanding the role of beliefs on intentions and actual usage of a tool for self-management of mental health among college students

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-02-27 DOI: 10.1016/j.apergo.2025.104485

Karim Zahed, Carl Markert, Farzan Sasangohar

Mental health issues are prevalent among college students, with digital interventions lacking in attempts to reduce participant attrition and address low engagement with technology. This study assessed changes in college students' beliefs regarding mental health after exposure to a digital mental health self-management coaching and education app, the Mental Health Evaluation and Lookout Program (mHELP). Participants' beliefs, measured using constructs from the Health Belief Model and Technology Acceptance Model, were compared to user engagement and changes in scores on validated scales for stress, depression, and anxiety. Participant beliefs including self-efficacy, perceived ease of use, and cues to action became more positive post-intervention. Higher participant self-efficacy indicated lower stress, anxiety, and depression ratings. Participants who believed stress to be a serious health threat and perceived the app as useful and easy to use were more likely to engage with the app. Providing digital mental health coaching showed significant relationships between students’ beliefs regarding mental health self-management, their engagement with the app, and the reduction in stress and anxiety.

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引用次数: 0

Improving dynamic endurance time predictions for shoulder fatigue: A comparative evaluation

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-02-24 DOI: 10.1016/j.apergo.2025.104480

Patricia O'Sullivan , Matteo Menolotto , Brendan O'Flynn , Dimitrios-Sokratis Komaris

Work-related musculoskeletal disorders (WMSDs) are commonplace in industry and a host of qualitative and quantitative approaches have been used to assuage the problem, including wearable sensors and biomechanical endurance models, both of which were used in the present study. Six endurance models (consumed endurance, new improved consumed endurance and the exponential and power Frey Law and Avin general and shoulder models) with four alternative maximum torque (

{T o r q u e}_{\max}

) quantification methods, including a novel approach to generate

{T o r q u e}_{\max}

, were compared. The proposed approach to quantify

{T o r q u e}_{\max}

, in combination with the new improved consumed endurance model produced the lowest root mean square errors (RMSE), and indicated improved performance compared to the literature. The mean RMSE was reduced from 41.08s to 19.11s for all subjects, from 26.13s to 12.16s for males, and 51.28s to 24.45s for females using the proposed method. R² for 25% and 45% standardised intensity dynamic tasks were .459 and .314 respectively, P < .01. This research provided an optimised and individualised endurance prediction approach for loaded dynamic movements which can be applied to industry tasks and may lead to reduced upper-limb strains, and potentially WMSDs.

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引用次数: 0

Identification of surgical human-robot interactions and measures during robotic-assisted surgery: A scoping review

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-02-20 DOI: 10.1016/j.apergo.2025.104478

Matthew Ball, Patrick Fuller, Jackie S. Cha

This study aims to identify the dynamics of robotic-assisted surgery (RAS) teams and their metrics. A scoping review across seven science, engineering, and clinical databases was conducted. It was found that literature focuses on skills and interactions centralized around the surgeon and technical components of the robotic system; however, limited literature exists on skill proceduralization specific for other surgical team members performing robotic-assisted surgery procedures. A framework that identifies the individuals (i.e., surgeon, surgical team members, and robotic platform), with their respective skill requirements (technical and nontechnical), and the required interactions among the team and RAS systems was developed. Future research in RAS human-robot interaction can address the need to understand changing dynamics and skills required by the surgical team with the continuing evolution and adoption of surgical robot technology.

引用次数: 0

Working memory capacity improves checking performance for errors on a simulated rail control task

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-02-20 DOI: 10.1016/j.apergo.2025.104482

Ryan D. McMullan , Nanda Aryal , Ling Li , Mark Wiggins , Joanna Clive , Johanna I. Westbrook

Checking performed by workers is crucial if safety is to be effectively managed in high-risk settings. We aimed to examine the influence of working memory capacity, mindfulness, sleep, and interruptions on checking performance for the detection of errors. A total of 86 participants completed a 32-min rail control simulation. Participants performed checks that involved matching versus critical analysis and assimilation with interruptions occurring during the task. Higher working memory capacity was associated with higher response accuracy and faster response latency. Response accuracy was also higher when participants engaged in matching compared to critical analysis and assimilation. Mindfulness and interruptions were not associated with performance. These results raise important questions about how checking and error detection can be optimised given differences in performance due to individual characteristics and task requirements.

引用次数: 0

An automated approach for assessing pressure thresholds on the side of the head

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-02-20 DOI: 10.1016/j.apergo.2025.104483

Yujia Du, Kexiang Liu, Yuxin Ju, Meng Qiu, Haining Wang

The aim of this study is to devise strategies for alleviating pressure discomfort associated with glasses-type wearables by examining pressure sensitivity at precise landmarks on the side of the head. A total of 197 healthy participants engaged in an experiment where pressure was applied using an automated force measuring system. Tactile threshold (TT), pressure discomfort threshold (PDT), maximum pressure tolerance (MPT), and pain pressure threshold (PPT) were gauged at 16 locations on the side of the head for each participant. The use of a series of grid-type templates facilitated the localization of landmarks based on individual head shapes and sizes. Notably, the area behind the ears exhibited higher pressure thresholds, while regions where temples sit horizontally were more sensitive to pressure. Gender differences were observed at specific locations, whereas age (<45 years old) and BMI did not exhibit any significant correlation with pressure thresholds. This research introduces an automated methodology for assessing pressure sensitivity through a high-density landmark map on the side of the head. The outcomes have significant implications for the ergonomic design of head-worn products, particularly for glasses-type wearables.

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引用次数: 0

Reclined postures in vehicle seats: Preferred seatback contours and head support locations

IF 3.1 2区工程技术 Q2 ENGINEERING, INDUSTRIAL

Applied Ergonomics

Pub Date : 2025-02-19 DOI: 10.1016/j.apergo.2025.104479

Matthew P. Reed, Sheila M. Ebert, Tyler R. Vallier

Reclined postures in vehicle seats have received increasing attention due to vehicle automation, but research using current seats may not be applicable. Furthermore, published recommendations for longitudinal seat back contour in automotive seats are difficult to apply to seat design due to insufficient information concerning reference points and contours. To address these gaps, a laboratory study was conducted with a specially constructed seat with a seat back pivot coincident with the seat H-point. Thirty men and women adjusted the seatback longitudinal to their preference at varying reclined angles and three different starting contours. Preferred head support locations were measured in each condition. The participants’ selected seat back contours were strongly influenced by the starting contour but were unrelated to seat back angle and to participant characteristics. Bézier parameters were used to estimate the range of contours that would be needed to accommodate the preferences of a large percentage of sitters.

引用次数: 0

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