International Journal of Occupational Safety and Ergonomics最新文献

Objectives. This study explores the effects of temperature steps on thermal responses to understand abrupt temperature shifts faced by heat-exposed workers during winter. Methods. Three temperature step changes with three phases (S20: 20-40-20 °C, S30: 10-40-10 °C, S40: 0-40-0 °C) were conducted. Phase 1 took 30 min, phase 2 took 60 min and phase 3 took 40 min. Eleven participants remained sedentary throughout the experiment, and physiological responses, thermal perception and self-reported health symptoms were recorded. Results. In temperature up steps, steady skin temperature and sweating onset were delayed, and heart rate dropped by 10 bpm from S20 to S40. In temperature down steps to cold conditions, individuals transitioned from thermal comfort to discomfort and eventually cold strain. Blood pressure increased in temperature down steps, correlating with temperature step magnitudes. Thermal responses to temperature steps of equal magnitude but opposite directions were asymmetries, which weakened as step magnitude increased. Thermal perceptions responded faster than physiological changes after temperature steps, while self-reported health symptoms lagged behind physiological responses. Conclusions. These findings contribute to expanding basic data to understand the effects of temperature step magnitude and direction.

Objectives. Shoulder protraction is frequently seen in office workers because of working with excessive trunk flexion for a long time. This study aimed to compare the effectiveness of stabilization exercises (SE) given in addition to office exercises (OE). Methods. Sixty office workers with shoulder protraction were divided into SE + OE (n = 30) and OE (n = 30) groups by stratified random sampling for 8 weeks and followed up for 4 weeks. Shoulder protraction was assessed with a caliper, muscle strength with a hand-held dynamometer, proprioception with an isokinetic dynamometer, vibration sense with a vibrometer and upper extremity functional performance with the closed kinetic chain upper extremity stability test. Results. There were significant improvements in all parameters in the OE + SE group, while increases in the strength of the upper trapezius, pectoralis major and infraspinatus muscles and in upper extremity functional performance were also found in the OE group (p < 0.05). During detraining, shoulder protraction, muscle strength, proprioception and upper extremity performance showed longer-term improvement with SE + OE (p < 0.05). Conclusion. The results obtained with the exercises demonstrate the importance of SE + OE in terms of maintaining proper posture and improving shoulder proprioception, muscle strength and functional performance.

Objectives. Unsafe behavior (UB) is defined as the likelihood of intentionally or unintentionally deviating from pre-defined plans. This study aims to investigate the validation of a self-report tool for measuring workers' cognitive-based UB using quantitative electroencephalography (QEEG). Methods. The cognitive-based unsafe behavior questionnaire (CUBQ) was completed by 632 front-line workers in a manufacturing industry to identify differences in the backgrounds of the subjects regarding UBs. Two groups were then selected as extreme groups and QEEG was conducted based on the international 10-20 electrode placement. Results. The mean values of absolute power (AP), alpha/beta ratio (ABR) and alpha/gamma ratio (AGR) from brain oscillations in different regions of the cortex were significantly different between the studied groups (p < 0.05). Additionally, these values were found to be significantly correlated with slips, lapses and mistakes, as measured by certain scales of the CUBQ (p < 0.05). Conclusions. The findings of this study indicated differences in brain oscillation activities among industrial workers with different UB backgrounds. These results confirm the effectiveness of CUBQ as a proactive tool for safety practitioners to predict industrial workers' UBs.

Objectives. The number of security guards in universities has increased significantly. This study aimed to predict work ability of university security guards. Methods. A cross-sectional study of 97 university security guards in Thailand was performed. Data were collected through interviews using a questionnaire covering social demographics, behavioral health and work ability. The data were analyzed using χ² tests and logistic regression models. Results. The average work ability index (WAI) score was 38.1 ± 3.8, with 65.0% of participants scoring 'good'. Social support significantly influenced the WAI (p = 0.004). Those with insufficient support were 4.3 times more likely to show poor work ability. Mental health also impacted the WAI (p = 0.006); those with poor mental health were 4.7 times at risk. Additionally, work experience affected the WAI (p = 0.039). Those with ≥5 years of experience showed reduced work ability compared to their less-experienced counterparts (adjusted odds ratio 0.4; 95% confidence interval [0.20, 0.96]). Conclusions. Supervisors should provide social support and offer rewards and commendations to enhance employees' abilities, health behaviors and management of underlying diseases. Additionally, organizations should prioritize health and safety in the workplace to ensure their employees are healthier and perform their tasks more effectively.

Objectives. Notwithstanding its economic importance, the construction industry is still facing challenges due to its high accident record. As a result, the goal of this study is to identify the key underlying causes of accidents in the Malaysian construction industry that construction stakeholders can focus on to reduce the menace of accidents in the industry. Methods. To achieve this goal, relevant literature was reviewed in order to identify the causes of accidents. The identified factors were used to develop the survey questionnaire for collecting primary data, and the collected data were analysed using exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). Results. The results of the EFA and CFA establish and confirm 11 clusters for the causes of accidents on construction sites: management problems; inadequate training; inadequate supervision; mental health problems; bad attitudes; inadequate funding; inadequate experience; material and equipment handling; poor safety practices; inadequate orientation; and work environment. Conclusion. The study concludes that addressing all 11 factors will drastically reduce the incessant accident occurrences in the construction industry. The result of this study will help construction stakeholders know where to direct their energy in an effort to reduce construction accidents.

Objectives. This research investigated the performance properties of protective gloves alongside improvement in thermo-physiological comfort properties. Methods. Knitted gloves prepared from filament stainless steel, filament Kevlar, staple spun Kevlar and filament glass were used in the core, while 100% viscose rayon and 50/50% polyester/viscose rayon were used in the sheath. Gloves were tested for cut resistance, tear resistance, puncture resistance and abrasion resistance as the prime focus, and thermo-physiological comfort properties were also tested. In this research, a multi-response optimization technique, i.e., principal component analysis, was applied to identify the best yarn combination for gloves based on the aforementioned properties. Thermal images were also taken in constant ambient conditions for temperature distribution maps across the hand's surface. Results. All of the results were evaluated statistically with analysis of variance, and concluded that the effects of the core yarn on thermo-physiological properties were less significant. Conclusion. The results revealed that samples having dual-core yarn exhibited better in terms of overall properties. The sample having dual-core filament Kevlar and staple spun Kevlar ranked the best. In addition, developed samples exhibited better comfort properties than the control sample.

Something is not right in the safety profession. Many books written by professionals in the 2010s express a strong discontent. These professionals are highly critical of their situation, practice, role and identity. In these books, they express what this article describes as the 'blues of safety professionals'. Although varying in writing style, tone, theoretical inspiration, emphasis and experience, they address similar issues which relate to practices corresponding, in their eyes, to outmoded, inadequate or even perverse ideas. The aim of this article is to introduce, summarize, explain and problematize the significance of this literature. Following a methodological section, the 'safety professional blues' is introduced. It is argued in another section that the 'blues' pinpoints what these authors consider to be flawed assumptions about many of the core ingredients of the safety profession. The roots of this discontent are the topic of another section, while a final section problematizes the 'blues'.