Assessment of workers' exposure to hand-arm and whole body vibration in one of the furniture industries in east of Tehran

Workers in wood industry are exposed to vibration and its damages. The purpose of this study was to evaluate exposure to hand-arm and whole body vibration in the wood industry. In this study, the parameters of whole body and hand-arm vibrations such as effective acceleration, overall equivalent acceleration, Vibration Dose Value and crest factor were studied on two Thicknessing planes, two sliding panel saw machines, two orbital sander, and three operators of perforate procedure. Assessments were done by the use of an oscillator and an analyzer of Svantak Co. Evaluating Hand-arm and whole body vibrations were conducted based on ISO 5349-1, ISO 5349-2 and ISO 2631-1 standards, respectively, and the findings/ the evaluated data were analyzed. The mean amount of daily exposure to hand-arm vibration (RMS) in Thicknessing plane, Orbital Sander and Sliding panel saw machine operators are respectively 5.56, 5.49 and 3.37 m/s2 . In addition, the average crest factor of the 3 jobs is higher than 6. Mean of daily Exposure to whole body vibration in 3 machine operators of Thicknessing plane, perforate procedure and Sliding panel saw is respectively, 0.28, 0.24 and 0.17 meters per square second. The crest factor for all the exposures was to be less than 6 and the mean of the calculated daily vibration dose equaled 5.83 with the standard deviation of 0.87( m)⁄s^1.75 . In further measured situations, exposure to hand-arm vibration is more than the standard level, so engineering and management measures are required to reduce the amount of exposure and support the health of the operators and the equipment

Predicting health risks of exposure to whole body vibration in the urban taxi drivers

Introduction: Limited studies have been done to evaluate the whole-body vibration (WBV) exposure experienced by Taxi drivers. Therefore, the aim of this study was to evaluate the exposure to whole body vibration and repeated shocks in urban taxi drivers and also to compare different methods of evaluation in this job environment. Material and Method: Measurement and evaluation process were conducted in accordance with procedure of the ISO 2631-1 and ISO 2631-5 standards. The measurements were done by SVAN 958 Sound and Vibration Analyzer and using tri-axial accelerometer centered on the contact surface between the seat and the driver in 9 taxis.   Result: The measurements done according to ISO 2631-1 method showed greater risk compared to Daily Equivalent Static Compression Dose, Sed, presented in ISO 2631-5. Calculated daily exposure durations for exposure action level in root-mean square, vibration dose value, and daily equivalent static compressive stress methods were 4.55, 3.54 and 31.70 hours, respectively. Conclusion: The large differences in estimated exposure durations of action limits and permissible limits resulted by different methods reflect the inconsistency of the selected evaluation methods. Therefore, future research is necessary to amend the limits presented in the standard

Assessment of workers' exposure to hand-arm and whole body vibration in one of the furniture industries in east of Tehran

Workers in wood industry are exposed to vibration and its damages. The purpose of this study was to evaluate exposure to hand-arm and whole body vibration in the wood industry. In this study, the parameters of whole body and hand-arm vibrations such as effective acceleration, overall equivalent acceleration, Vibration Dose Value and crest factor were studied on two Thicknessing planes, two sliding panel saw machines, two orbital sander, and three operators of perforate procedure. Assessments were done by the use of an oscillator and an analyzer of Svantak Co. Evaluating Hand-arm and whole body vibrations were conducted based on ISO 5349-1, ISO 5349-2 and ISO 2631-1 standards, respectively, and the findings/ the evaluated data were analyzed. The mean amount of daily exposure to hand-arm vibration (RMS) in Thicknessing plane, Orbital Sander and Sliding panel saw machine operators are respectively 5.56, 5.49 and 3.37 m/s2 . In addition, the average crest factor of the 3 jobs is higher than 6. Mean of daily Exposure to whole body vibration in 3 machine operators of Thicknessing plane, perforate procedure and Sliding panel saw is respectively, 0.28, 0.24 and 0.17 meters per square second. The crest factor for all the exposures was to be less than 6 and the mean of the calculated daily vibration dose equaled 5.83 with the standard deviation of 0.87( m)⁄s^1.75 . In further measured situations, exposure to hand-arm vibration is more than the standard level, so engineering and management measures are required to reduce the amount of exposure and support the health of the operators and the equipment

Factors Affecting the Use of Respiratory Protection Devices Based on the Health Belief Model in Welders

Background: Welding industry is one of the most dangerous industries in the world. Because of the nature of their jobs, welders are exposed to serious injuries. The present study aimed to investigate the effective factors on the use of respiratory protection devices in welding workshops. Methods: In this cross-sectional study, 180 welders were studied in Gonabad city. A respiratory protection inventory was used to investigate the effective factors on the use of respiratory protection devices based on the health belief model in welders. Data were analyzed using SPSS software. Results: The working hours were 1.39 (8.25, the respiratory protection score was 10.12 (91.25). In this study, which was carried out on 180 people, there was a significant correlation between the score of respiratory protection and marital status and working shift. However, there was no significant relationship between respiratory protection score and the level of education and type of employment. Conclusion: The results of this study revealed that the respiratory protection score in the studied welders is moderate and should be considered by managers and the relevant authoritie

Improved Hockey Rink Localization via Augmentation and Temporal Frame Analysis

Deep-learning based hockey analysis generally requires automaticrink localization from broadcast videos. This information is used todetermine the locations of players and the puck, which is importantfor further analysis such as puck trajectory and player behaviour.Models for this task determine the homography matrix used to warpthe frame onto the rink template, or vice-versa. However, trainingmodels with good performance is challenging due to lack of trainingdata. Augmentation algorithms have been shown to be effective fordifferent machine learning tasks. Here we propose a set of newaugmentation techniques specifically for the task of homographyestimation to improve the model’s reliability in new situations. Tofurther improve smoothness and reliability of localization, we takeadvantage of refined homography between successive frames subsampledfrom videos in the inference stages. Results show that thenew augmentation technique along with the smoothing approachcan improve the performance by ∼ 2%