علی آبادی, محسن
استادیارگروه مهندسی بهداشت حرفه‌ای، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران
[ 1 ] - ارزیابی میزان کاهندگی صدای گوشی های ایرماف رایج برمبنای روش میدانی میکروفن داخل گوش در محیط های کاری
Background and aims Nominal noise reduction rating of the earmuff manufacturers can be different compared with the actual noise attenuation rating. The current study aimed to determine the actual noise reduction rate of current hearing protection devices in the real workplaces using a field microphone in real ear method (FMIRE). Methods: In this cross-sectional study, five common earmuffs we...
[ 2 ] - کنترل صدای پمپ های آب در یک نیروگاه حرارتی
Background and aims: The power plants, including important industry of the country in which a large number of noise sources which workers are exposed with harmful levels occupational noise. The aim of this study was designing enclosures to noise control in the feed water pumps in a power plant. Methods: This cross-sectional study and their Interventional plants were done on the ground floor ...
[ 3 ] - مطالعه پرتوهای فرابنفش انتشار یافته از لامپهای فلورسنت فشرده متداول
Background and aims: Compact fluorescent lamps(CFLs) are low-pressure mercury vapor lamps, which are more useful than other light sources. Some studies reported the leakage of UV radiation from CFLs. The aim of this study was measuring of ultraviolet radiation from universal compact fluorescent lamps in Iran. Methods: In this study, measuring of UV radiation of 54 bulb compact fluorescent lamps...
[ 4 ] - بررسی میزان آلودگی صدا و اثرات آن بر احساس خستگی در کارکنان شعبات بانک های دولتی شهر همدان
Background and aims: Noise pollution in bank, as environment for presentation of financial services, is very important from the viewpoint of comfort aspects. This study aims to assess noise pollution and its effects on subjective fatigue of staffs in the governmental banks. Methods: In this cross sectional study, noise equivalent levels were measured in 20 governmental banks located in Hamadan...
[ 5 ] - اتاقک سازی به منظور کنترل صدای دستگاه دمنده هوا در یک صنعت فولاد
Background and aims: In the steel industry, air blowers used to supply compressed air are considered as sources of annoying noise . This study aims to design an acoustic room chamber in order to control the noise level of the air blower. Methods: Measuring of the noise level along with frequency analysis was performed by using sound level meter, model ofCASELLA-Cell.450 . Dosimetery was per...
[ 6 ] - بررسی میزان مواجهه شغلی با میدان های مغناطیسی پایا واثرات بهداشتی آن در مراکز تصویر برداری تشدید مغناطیسی
Background and aim: Magnetic resonance imaging as one of the best medical scanning technique is considered to be the most important sources of static magnetic fields. The staffs of MRI ´s units frequently exposed to these static magnetic fields. This study aims to determine the occupational exposure level to mentioned field and its related health effects in MRI´s units. Methods: The occup...
[ 7 ] - بررسی میزان مواجهه عمومی کاربران با امواج مایکروویو ناشی از انواع تلفن همراه متداول
Background: Due to the increase of public concern about the physical and psychological effects of radiation on the health of cell phone users, the present study aimed to determine public exposure to microwave propagation from current cell phones in different user conditions. Methods: In this cross-sectional study, the effective intensity of microwave radiation from cell phone were measured...
[ 8 ] - شاخص اولویت بندی کنترل صدا (NCPI) در یک شرکت تایرسازی
Introduction; controlling noise pollution in an indoor environment has always been faced with administrative and financial constraints. Prioritizing in a scientific manner is a useful approach in dealing with such problems. The aim of the present study was to determine the noise control prioritizing index (NCPI) in various units from a tire manufacturing company. Methods; the sound pre...
[ 9 ] - بررسی میزان مواجهه با تنش های سرمایی و پاسخ های فیزیولوژیک بدن کارگران مکانیک خودرو شهر همدان
Introduction: Continuous exposure to cold air is considered to be a hazardous agent in the workplace in cold seasons. This study aimed to determine the level of cold stress and relation with physiological responses in auto mechanic employees. Method: This cross-sectional study was conducted in the winter of 1395 on auto mechanic employees in Hamadan city. Physiological responses during daily...
[ 10 ] - مطالعه خصوصیات جذب صوتی مواد ساختمانی رایج در بناهای صنعتی و اداری کشور
Introduction: In Iran country, there is a lack of reliable data on acoustic characteristics of building materials applied in the offices and industrial rooms. This study aimed to investigate noise absorption characteristics for current building and acoustics materials and provided the acoustic database. Method: In this cross sectional study, the minimum of 60 building and acoustic mate...
[ 11 ] - ارزیابی مواجهه با ارتعاش دست و بازو و اثرات بهداشتی مرتبط با آن در کارگران سنگبری های شهر همدان
Introduction: The workers employed in stone cutting workplace are exposed to hand-arm vibration and its complications. The aim of this study was to evaluate the exposure to hand-arm vibration and its health effects on workers in the stone cutting workshops. Methods: In this descriptive-analytic study, 40 workers of Hamadan city stone cutting who worked with stone cutting machines were examin...
[ 12 ] - ارزیابی عملکرد آکوستیکی مانکن سر جهت استفاده در آزمون های تعیین قدرت کاهندگی صدای وسایل حفاظت شنوایی
Introduction:One of the recommended methods for evaluation effectiveness of hearing protection is use the acoustic fixture accordance with standard ISO 4869-3. The aim of this study was evaluate the acoustic performance of fixture for using in noise reduction rate tests of hearing protection devices in the laboratory. Methods: In this cross-sectional study , noise reduction rates o...
[ 13 ] - تعیین الگوی مواجهه کارگران با صدا در یک صنعت فولادسازی
Introduction: Steel industries are one of the major needs of the country. Noise pollution in steel production operations is an occupational hazard because of special equipment such as electric arc furnaces. The aim of this study was to evaluate noise pollution in various units of a steel company for determining the occupational exposure pattern. Methods: This was a cross-sectional and analyt...
[ 14 ] - ارزیابی و امکان سنجی بهبود سامانه روشنایی مصنوعی در کارگاه خدمات فنی پالایشگاه چهارم گاز پارس جنوبی
Background & Objectives: Desirable and ergonomic lighting in the workplaces has a significant impact on the visual effects and improve the efficiency and productivity of employees. This study aims to evaluate the lighting system and feasibility of improving the artificial lighting system for comfort lighting in the workshop of the Fourth South Pars Gas Refinery. Methods: In this descriptive-...
[ 15 ] - بررسی شاخص های آسایش صوتی کارکنان دفاتر باز اداری دربانک های دولتی شهر همدان
Background & Objectives: Noise is one of the most detrimental factors in working environments that alongside other physical problems have adverse effects on the mental health of employees. Open plan offices such as banks are under the influence of noise pollution sources, which can have a negative impact on health and comfort of employees. This study aimed to identify the sources of noise...
[ 16 ] - بررسی مقایسه ای بازده سیکلون ، اسکرابر مه پاش و سیستم تلفیقی سیکلون- اسکرابر در کنترل ذرات سیلیس هوای کارگاه های سنگ کوبی
هدف از این مطالعه تعیین بازده جمع آوری سیکلون متداول واسکرابر مه پاش در سیستم های تهویه موضعی راه اندازی شده جهت حذف ذرات سیلیس در کارگاه های سنگ کوبی می باشد. در این مطالعه نمونه برداری ایزو کینتیک گرد و غبار در داخل سیستم تهویه موضعی قبل و بعد از وسایل غبارگیر بر اساس روش شماره 5 سازمان EPA انجام گرفت و تعیین مقدار نمونه های گرد و غبــار جمع آوری شده به روش گراویمتری انجام پذیرفت. نمونه بر...
[ 17 ] - بررسی تجربی سطح ناتوانی عملکرد دستی ناشی از مواجهه با ارتعاش دست بازو در کارگران شاغل در یک صنعت ریخته گری
Background: Exposure to hand-arm vibration is one of the most common physical harmful factors. The purpose of this study was Experimental study of the level of manual performance disability caused by exposure to hand-arm vibration among automobile casting workers. Methods: This study was performed on 53 casting workers as case group and 28 controls as control group. The measurement of the vi...
[ 18 ] - بررسی میزان کاهندگی صدای وسایل حفاظت شنوایی برمبنای روش میکروفن داخل گوش MIRE در شرایط آزمایشگاهی
Introduction: Nominal noise reduction rate of the earmuff manufacturers can be different compared with the actual attenuation rate. The present study aimed to determine the actual noise reduction rate of common hearing protection devices using microphone in real ear method. Materials and Methods: In this study, five brands of common earmuffs used in Iranian industries were investigated on 30...
[ 19 ] - بررسی شدت میدانهای الکترومغناطیسی انتشار یافته از لامپهای فلورسنت فشرده متداول
Introduction: In recent years, compact fluorescent lamps have been more widely used across the country as a means of optimizing energy consumption. Given the health consequences of lighting sources, the present study was conducted to investigate the intensity of electromagnetic fields emitted by common compact fluorescent lamps. Materials and Methods: The study examined 54 compact fluo...
[ 20 ] - بررسی میزان مواجهه عمومی با امواج مایکروویو انتشار یافته از سامانه بدون سیم (وایرلس) در دانشگاه علوم پزشکی همدان
Introduction: Due to the increase of public concern about the physical and psychological effects of radiation on the health of users, the present study aimed to determine the extent of public exposure to microwave emissions from wireless system in an educational setting. Materials and Methods: In this cross-sectional study, the effective intensity of microwave radiation were measured in 11...
[ 21 ] - بررسی شرایط ارگونومیکی کار با نمایشگرهای تصویری و ارتباط آن با احساس خستگی در دانشجویان تحصیلات تکمیلی دانشگاه علوم پزشکی همدان
Background: The use of visual monitors especially in relation to computer can cause health effects which have negative impacts on mental and physical performance of users. This study aims to determine the relation between ergonomic conditions in use of visual monitors and subjective feeling of fatigue in master science students as permanent users. Methods: In this study, 40 students in the Ham...
[ 22 ] - بررسی آلودگی صدا و آسایش آکوستیکی در کلاسهای درس دانشگاه علوم پزشکی همدان در سال 1391
Introduction: Noise pollution cause mental fatigue, concentration disturbance and learning loss in students during the training activities. This study aims to evaluate Noise pollution and the level of acoustical comfort in typical classrooms, and present treatment methods for improving acoustic comfort. Method: In cross sectional study, twenty classrooms in the seven faculty of Hamadan Univers...
[ 23 ] - بررسی سطح استرین سرمایی و ارتباط آن با پاسخ های فیزیولوژیک در شاغلین مکانیک خودرو
Introduction: Continuous exposure to cold air is considered to be a hazardous agent in the workplace in cold seasons. This study aimed to determine the level of cold strain and relation with physiological responses in auto mechanic employees in cold seasons. Method: This cross-sectional study was conducted in the winter of 2017 on auto mechanic employees in Hamadan city. Physiological response...
[ 24 ] - مقایسه روش های نسبت موج ایستا و تابع انتقال در تعیین ضریب جذب صوتی مصالح
Introduction: Sound absorption coefficient determination is one of the most important factors among material selection for indoor noise control. The objectives of this study were: 1) comparison sound absorption coefficient of different materials by standing wave ratio and transfer function methods, and 2) developing a regression model in adjusting provided results. Methods: In this study, 46 a...
[ 25 ] - ارزیابی صدای شغلی و ارائه ی طرح کنترلی در ایستگاه‌های تقلیل فشار گاز شهری
زمینه و هدف: تاسیسات تقلیل فشار گازدرون شهری با افزایش مصرف گاز و کشش بار بیش از ظرفیت یکی از منابع آلودگی صدا محسوب می‌گردند هدف از این مطالعه ارزیابی و ارائه طرح کنترل مواجهه با صدا شغلی ایستگاه‌های تقلیل فشار گاز شهری بوده است.روش کار: ارزیابی محیطی صدا به همراه تجزیه فرکانسی آن بر اساس استاندارد(2009)9612 ISO صورت گرفت. پس ازتعیین محدوده تراز فشار صوت منبع اصلى صدا شناسایى گردید. همچنین به...
[ 26 ] - Investigation of combined effects of noise and low air temperature on human-environmental comfort and physiological responses- An experimental study
Background and Aim: Combined exposure to noise and temperature can affect the neurophysiological responses of the office staff. The present study was done to investigate the impacts of combined exposure to noise and low air temperature on physiological responses and environmental comfort. Methods: In this experimental study, the studied population included the students who were randomly selecte...
[ 27 ] - Evaluation of estimation models for acoustic reverberation time in educational and office environments
Noise pollution is considered as one of the most annoying factors in educational and office environments. In these environments where learning processes and intellectual activities are ongoing, an effective acoustic design is necessary. The aim of this paper is to assess the reverberation time as one of the important indicators in describing the acoustic characteristics of rooms. In this study,...
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