منظم, محمدرضا
دانشگاه علوم پزشکی تهران
[ 1 ] - ارائه مدل ارزیابی صدای محیطی و فردی در یک مجتمع پتروشیمی
Background and Objective : Noise is considered as a common occupational health hazard in a wide range of occupational settings including oil and gas industries and related companies. This research aimed to assess the environmental noise and personal exposure in a petrochemical plant. Method: First, environmental noise measurement was performed as recommended by ISO9612 (1997) and next, shor...
[ 2 ] - ارائه یک مدل ریاضی ساده و اعتبار سنجی آن جهت تعیین بهترین حوزه عملکرد موانع صوتی
Background and aims Traffic noise barriers are the most important measure to control the environmental noise pollution. Diffraction from top edge of noise barriers is the most important path of indirect sound wave moves towards receiver.Therefore, most studies are focused on improvement of this kind. Methods T-shape profile barriers are one of the most successful barrier among many dif...
[ 3 ] - کاربرد سطوح پخش کننده در افزایش راندمان آکوستیکی مانع های موازی شیب دار T شکل
Background and aimsThe paper presents the results of an investigation on the acoustic performance of tilted profile parallel barriers with quadratic residue diffuser tops and faces.MethodsA2D boundary element method (BEM) is used to predict the barrier insertion loss. The results of rigid and with absorptive coverage are also calculated for comparisons. Using QRD on the top surface and faces o...
[ 4 ] - بررسی مواجهۀ کارکنان یک نیروگاه حرارتی با میدان مغناطیسی در فرکانس بینهایت کم و اثر احتمالی آن بر شدت بی‌خوابی و خواب‌آلودگی آنان
Insomnia is one of the most common sleep disorders, characterized by difficulties in sleep initiation, sleep maintenance or early morning awakening. Sleepiness is also such issues that associated with driving accidents, work accidents, and reduces efficiency and numerous interpersonal difficulties. The aim of the present study is to evaluate the severity of insomnia and sleepiness workers who w...
[ 5 ] - سنجش مواجهه شغلی راهبران قطار های شهری با میدان مغناطیسی پایا
Introduction: One of the pollutants that is developing in human life day by day is Magnetic field. In modern urban transport systems, diesel motors have been replaced with electric motors, working with alternating and direct currents, and leading to occupational exposure of drivers with magnetic fields. This study aimed to determine the urban train's drivers exposure with static magnetic fields...
[ 6 ] - قوانین و استانداردهای استرس حرارتی کلیدی برای پیشگیری از بیماری‌های ناشی از گرما
Introduction: One ways to prevent heat stress illness and protect workers is regional and national legislation and international standards about heat stress. If these regulations and standards are implemented correctly, they can be very effective and efficient. The aim of this review research was studying the importance of heat stress, the ways of prevention of heat related illnesses based on t...
[ 7 ] - ارزیابی مواجهه شغلی راهبران قطار های شهری تهران با میدان های مغناطیسی در فرکانس بی نهایت کم
Introduction: Occupational exposure to Extremely Low Frequency Magnetic Fields (ELF-MFs) in train drivers is an integral part of the driving task and creates concern about driving jobs. The present study was designed to investigate the occupational exposure of Tehran train drivers to extremely low frequency magnetic fields. Methods: In order to measure the driver’s exposure, from each ...
[ 8 ] - بررسی تاثیر کیفیت روغن موتور در میزان تراز صوتی ناشی از موتور اتومبیل
Introduction: Vehicle engine id one of the main sources of noise which its level is influenced by various parameters. The aim of this study was to investigate the impact of motor oils quality before and after oil change on the variability of vehicle engine induced noise level. In this study it is tried to follow-up the efficacy of motor oil quality on engines sound level. .Material and Method...
[ 9 ] - بررسی اثر آزردگی ناشی از مواجهه با صدا بر اختلال خواب شاغلین نیروگاه بادی منجیل
Introduction: Installation of wind turbines in residential areas due to their unique sound characteristics may cause noise annoyance. Noise annoyance can increase the risk of health problems and sleep disturbance. Thus, this study was conducted to assess the effect of wind turbine noise annoyance on sleep disturbance among the Manjil wind farm workers. .Material and Method: All the Manjil wind...
[ 10 ] - ارزیابی شاخص‌های آلودگی صوتی در بافت قدیم شهر بیرجند در سال 1389
Background and Aim: Noise pollution is recognized as a major problem in urban areas. Therefore, the current study was aimed to determine noise pollution indices in Birjand old districts. Materials and Methods: In this cross-sectional and analytical-descriptive study, noise measurement was performed by means of "CEL" sound level meter (model 450.490). Equivalent noise level "Leq 10 min" was meas...
[ 11 ] - Individual Job Performance assessment Models: A Systematic Review Study
Introduction: There are several generic and specific models to assess the individual job performance (IJP). While these methods may provide the valuable information, none of them cover the complexity and wide range of the behaviors which express the IJP. This review study aimed to identify all existing models and incorporate them to achieve a comprehensive conceptual model to assess the IJP. ...
[ 12 ] - The Impact of Chisel Shape and Length on Hand-Arm Vibration Transmitted from Electrical Demolition Hammer Handle on Concrete Surfaces
Introduction: This study aims to determine the amount of hand-arm vibration transmitted from heavy electric destruction tools and the effect of using chisel with different lengths and shapes when demolishing concrete surfaces. Material and Methods: To evaluate the magnitude of hand-arm vibration on the left and right handles of two powerful electric demolition hammers commonly applied in Irani...
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