Noise exposure is one of the most important physical agents in workplace which can induce job stress several ways.The aim this study was to model interactions between independent and mediating variables using structural equation modeling.In study, Weinstein's noise sensitivity scale, annoyance questionnaire, Health Safety Executive (HSE) questionnaire satisfaction scale were used.To assess worker's exposure, 8-hours equivalent continuous A-weighted sound pressure level (L Aeq,8 h ), measured...

The purpose of this study was to investigate the relationship among noise exposure, sensitivity, and annoyance with job satisfaction stress workers a textile industry. In study, Weinstein’s Noise Sensitivity Scale, Annoyance Questionnaire (recommended based on ISO 15666-2003), Health Safety Executive (HSE) Job Stress Questionnaire, Satisfaction Scale were used determine degree annoyance, occupational stress, satisfaction, respectively. results showed that there significant difference in mean...

Introduction: It is necessary to pay attention the key role of chain dry boom crane in heavy industrial projects such as steel industry, identify and manage occupational risks related it. This study was conducted with aim identifying, evaluating, managing job associated cranes Yazd Alloy Steel Oxygen Plant project using HAZID technique providing control strategies reduce risk level. Materials Methods: qualitatively technique. The statistical population included 50 operators, managers,...

Determining the structural properties of aluminum metal foam is essential to predicting its acoustic behavior. Acoustic models are presented that show relationship between morphology absorber and sound absorption coefficient (SAC). Optimizing parameters affecting SAC can be maximum theoretically achieved at each frequency. In previous article (https://doi.org/10.32604/sv.2021.09729) porosity percentage (Ω), pore size (D) opening (d) were optimized by genetic algorithm Lu model. this study,...

Increasing the establishment of integrated management systems (IMSs) is done with purpose leaving traditional methods and replacing them modern methods. Thus, present study sought to analyze events investigate impact IMS on health safety performance indices in an Iranian combined cycle power plants.This case was conducted 2012 all units Yazd Combined Cycle Power Plant accident victims before after implementation IMS. For data analysis prediction IMS, descriptive statistics Kolmogorov-Smirnov...

Inadequate lighting will be associated with some degree of perceptual error such as sleepiness. The main purpose this study was to investigate the interactions between mood, fatigue, mental workload, and sleepiness their relationship quantitative indicators street in passenger car drivers. present a cross-sectional that performed on 270 drivers cars. indices studied were illuminance, luminance, uniformity, disability glare which calculated using Hagner device (EC1-L) according EN 13201...

If we want to provide the efficient training intervention increase duration of using hearing protection devices (HPDs) by workers, need a tool that can estimate person's threshold taking into account noise exposure level, age, and work history, compare them with audiometry find out percent reduction workers loss.First, level was determined according ISO 9612, then 4000 Hz done age history.On basis 1999 estimated if device not used continuously correctly, device's actual performance reduced...

Due to its unique features, the metal foam is considered as one of newest acoustic absorbents.It a navel approach determining structural properties sound absorbent predict acoustical behavior.Unfortunately, direct measurements these parameters are often difficult.Currently, there have been models showing relationship between morphology and absorption coefficient (SAC).By optimizing effective on SAC, maximum SAC at each frequency can be obtained.In this study, using Benchmarking method, model...

Background: Noise is an important occupational safety and health issue in many workplaces.Noise annoyance a strong measurable mental response.It reaction that person expresses to the noise exposure.Thus, this study investigates correlation between exposure its terms of components.Materials Methods: This was correlational descriptive conducted on 100 workers.Respondents were recruited by simple random sampling method.The equivalent sound level (LeqA) determined using dosimetry.The numerical...

Most work-related musculoskeletal disorders (MSDs) are associated with improper postures and poorly designed workstations. This study is an attempt to examine the prevalence severity of MSDs as well anthropometric dimensions among city bus drivers.This cross-sectional was carried out on 60 male drivers. A body discomfort chart used evaluate MSDs. Spearman correlation employed relationship between size discomfort.Data analysis showed that reported in lower back (33.3%), upper (18.3%) knee...

Abstract Background Various agents such as psychosocial items and accident proneness can affect cognitive failures through different paths. The probable paths are the direct effects of workplace on their indirect mediator variable proneness, which has not yet been studied by others. Thus, present study aimed to investigate these Methods This cross-sectional was conducted 164 male employees Karoon Sugar Company in 2018. participants were asked complete a background demographic questionnaire,...

The present study aimed to determine the role of job components and individual parameters on raised blood pressure among male workers textile industry who were exposed continuous high noise level.Information all eligible subjects including demographic characteristics, medical history characteristics obtained by direct interview referring records.All measurements done using mercury sphygmomanometer in morning before work.The 8-hours equivalent A-weighted sound level, level cholesterol...


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The study aims to estimate metal foam microstructure parameters for the maximum sound absorption coefficient (SAC) in specified frequency band obtain optimum fabrication.Lu's theory model is utilised calculate SAC of metallic foams that refers three morphological parameters: porosity, pore size, and opening.After Lu validation, particle swarm optimisation (PSO) used optimise parameters.The values are obtained at frequencies 250 8000 Hz, porosity 50 95%, a size 0.1 4.5 mm, opening 0.07 0.98...

Noise is one of the environmental factors with mental and physical effects. The workload also multiple demands task. Therefore, his study investigated relationship between noise exposure mood states at different levels workload. recruited 50 workers from manufacturing sector (blue-collar workers) as exposed group office (white-collar control group. Their occupational was measured by dosimetry. Stress-Arousal Checklist (SACL) NASA Task Load Index (NASA-TLX) were used to measure workload,...

Introduction: Firefighting is one of the occupations that requires high physical and aerobic power due to nature job demands this profession. Therefore, present study aimed investigate relationship among Workability index (WAI), mental workload, musculoskeletal disorders (MSDs) their effective factors in firefighters. Methods: This was a cross-sectional study, which carried out on 250 firefighters Tehran. Data were collected using WAI, NASA-TLX Body Discomfort Chart (BDC). analysis...

This study presents a holistic model based on Fuzzy Bayesian Network-Human Factor Analysis and Classification System (FBN-HFACS) to analyze contributing factors in the pandemic, Covid 19, risk management under uncertainty. The contains three main phases include employing a) HFACS systematically identify influencing validation using content validity indicators, b) Set Theory obtain prior probability distribution of pandemic address epistemic uncertainty subjectivity, finally, c) network...

The central oxygen unit of hospitals is considered a high-risk unit, requiring high safety standards to maintain the integrity system during COVID-19 pandemic. linear reasoning assumption conventional risk analysis methods cannot adequately describe these modern systems, which are characterized by tight connections and complex interactions between technical, human, organizational aspects. Therefore, this study presents new comprehensive approach tanks in In study, trapezoidal fuzzy numbers...

Relationship between Workplace Noise Exposure and Worker's Communication Skills among Miners in Iran: A Cross-Sectional Study

Metal foams are interesting as sound absorbers because of their strength, low mass, high hardness, and damping. To foam fabrication more accurate achieve higher absorption coefficient (SAC), the effective parameters should be optimized. In earlier study (DOI: 10.32604/sv.2021.09729), porosity percent- age (Ω), pore size (D) opening (d) were optimized by authors. this study, we intend to investigate effect Ω percentage, D d on SAC aluminum in frequency 0 8000 Hz with thicknesses 5, 10, 20, 30...

Fabricating of metal foams with desired morphological parameters including pore size, porosity and opening is possible now using sintering technology. Thus, if it to determine the morphology foam absorb sound at a given frequency, then fabricate through sintering, expected have optimized for best absorption. Theoretical absorption models such as Lu model describe relationship between coefficient. In this study, was used optimize Aluminum For purpose, numerically solved written codes in...