گلمحمدی, رستم

[ 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 ارتباط بین میزان مواجهه صوتی و استرس شغلی با اعمال ناایمن و حوادث رانندگی در رانندگان اتوبوس‌های شهری همدان در سال 1390

  Background and aims : Among all systems that each person may interact with in daily life public transportation systems may expose them to various risks. The noise exposure of drivers can cause accidents through developing hearing loss and stress and consequent impact on driver’s safety performance. The main objective of this study was to evaluate the relation between noise exposure and occupa...

[ 5 ] - بررسی شیوع دردهای اسکلتی- عضلانی قالی‌بافان زن و ارتباط آن با میزان روشنایی در کارگاه‌های قالی‌بافی شهرستان بیجار

Introduction: Ergonomic problems and inadequate lighting are the causes of increased prevalence of musculoskeletal disorders in the workplace. The present study was conducted to evaluate lighting in carpet weaving workshops in Bijar and its association with musculoskeletal pain among female carpet weavers. Methods: In this descriptive cross-sectional study, 104 Carpet weaving workshops were ...

[ 6 ] - افت شنوایی شغلی ناشی از مواجهه با صدا در یک صنعت تراکتورسازی

Background: Noise Induced Hearing Loss (NIHL) is one of the most common occupational diseases in the world. About 16% of hearing loss is associated with noise exposure in the workplaces. The aim of this research was investigation of the relationship between noise exposure and hearing loss. Methods: This cross-sectional study was conducted in 2010 on1062 workers in Tabriz Tractor Manufacturing ...

[ 7 ] - طراحی و ساخت لوله امپدانس برای تعیین ضریب جذب صوتی برخی مصالح مورد استفاده در کنترل صدا

Introduction & Objective: Noise is one of the most important harmful agents in work environment. In spit of industrial improvements, exposure with over permissible limit of noise is counted as one of the health complication of workers. In Iran, do not exact information of the absorption coefficient of acoustic materials. Iranian manufacturer have not laboratory for measured of sound absorbanc...

[ 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 ] - ارزیابی روشنایی مصنوعی و ارتباط آن با وضعیت‌های بدن حین کار در آرایشگاه‌های زنانه شهر همدان

Background and objective: long term work, nonstandard and improper tools, and inadequate lighting in the workplaces are important factors which resulted in awkward postures in hairdressers. The present study was performed to assess general and local lighting and investigate its relationship with postural status assessed by Rapid Entire Body Assessment (REBA) method in Hamadan’ hair salons...

[ 10 ] - مروری بر اثرات شنوایی و غیر شنوایی مواجهه شغلی با صدا بر سلامت زنان

Introduction: Increasing women’s participation in the labor market is one of the most important social phenomena in the world. Currently, the number of pregnant mothers working in industries in the developing countries is significant; therefore, there are always issues related to occupational hazards and pregnancy health. This study has analyzed articles that examined the complications of...

[ 11 ] - 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...

[ 12 ] - طراحی و ساخت آداپتور آزمون حفاظهای شنوایی

Introduction: To determine the effectiveness of hearing protective devices that lack the technical information are one of the major challenges of occupational health experts to judge the impact of this exposure on reducing the level of occupational exposure to noise. The aim of this study was to design a built a hearing test adapter and expriment it to determine the reduction rate of earmuffs a...

[ 13 ] - 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...

[ 14 ] - 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...

[ 15 ] - 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...

[ 16 ] - ارزیابی عملکرد روش غربالگری صدا جهت برآورد ریسک صدا در کارگاه های کوچک سطح شهر همدان

Introduction: noise pollution has a negative effect on physiological parameters, efficiency and auditory system. The aim of this study was to evaluate the performance of a sound screening method for estimating sound risk in small workshops of Hamadan city. Methods: This cross-sectional study was conducted in 22 plants with more than 20 workers. Noise screening was done using a screen...

[ 17 ] - بررسی توانایی شغلی و ارتباط آن با شدت اختلالات اسکلتی عضلانی در کارکنان کارخانه سیمان شمال

Background & Objectives: Employee productivity depends on the individuals’ ability to work. As musculoskeletal disorders are considered one of the main causes of reduced work ability and disability, the present study was conducted to assess work ability among workers of Shomal Cement Co. and to determine the relationship between the Work Ability Index (WAI) and the severity of musculosk...

[ 18 ] - ارزیابی ریسک اختلالات اسکلتی عضلانی با استفاده از روش تحلیل وظایف تکراری و اجرای برنامه‎های مداخله ارگونومی در یک شرکت تولیدی

 Background & Objectives : Currently, work-related musculoskeletal disorders are a major occupational health concern. This study tried to evaluate the risk factors of musculoskeletal disorders by the assessment of repetitive tasks (ART). It also sought to determine the effects of an ergonomic intervention on the mentioned risk in a manufacturing company .  Methods: In this study, 6...

[ 19 ] - 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...

[ 20 ] - بررسی شاخص فشار وضعیتی با استفاده از روش LUBA و شیوع اختلالات اسکلتی عضلانی در دندان‌پزشکان

Background & Objectives : High prevalence of musculoskeletal pain in dentistry represents the importance of investigation of working conditions in this profession to reduce musculoskeletal disorders.The purpose of this study was to determine the postural load on the upper limb postural using macro LUBA technique and the prevalence of musculoskeletal disorders. Methods: This study was conduct...

[ 21 ] - مطالعه شاخص های آلودگی صدا و خصوصیات آکوستیکی بنای مدارس شهر تهران

صدا یکی از مصادیق آلودگی محیط زیست است که می‏تواند باعث آزار و ناراحتی شهروندان و محدود نمودن کارایی شاغلان گردد. مدارس به عنوان یکی از اماکن پر اهمیت، ضرورت دارد به لحاظ آلودگی صدا مورد بررسی قرار گیرد. زیرا شرایط آکوستیکی ضعیف می تواند اختلالاتی در محاوره و تمرکز دانش‏آموزان به وجود آورد و بر یادگیری آن ها تاثیر نامطلوب داشته باشد.  در مطالعه حاضر که در سال 1383 انجام یافته است، نمونه‏ای شامل...

[ 22 ] - رویکرد مبتنی بر تحلیل رویداد برای موضوعات اخلاق در آموزش

[ 23 ] - 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...

[ 24 ] - ارتباط روشنایی مصنوعی با وضعیت بدن در کارکنان اداری

Background: Inadequate lighting in the workplace can cause unconventional changes in the posture of office workers. Poor ergonomic conditions in the office cause inappropriate postures during work and increase pressure on the musculoskeletal system which can cause some disorders in long-term. In this study, the relationship between work environment lighting with the prevalence and severity of m...

[ 25 ] - مطالعه میدانهای الکترومغناطیس تلفن های همراه متداول و برخی علائم خود گزارش شده کاربران

Introduction: Many calls already perform by cell phones that have need to radiation exposure by users. Because of health reasons and some doubts about effects, this study was conducted to determine the extent of the mobile phones radiations and self report symptoms of users. Material and Method: In this cross-sectional study, 80 available randomly users contain students and staffs of Hamadan U...

[ 26 ] - بررسی اثر نور روز بر سلامت روانی سالمندان

This before-after clinical trial investigated the effect of daylight on morning and night melatonin, subjective general health using GHQ questionnaire, sleepiness and alertness on elderly who lived in nursing houses. Nineteen nursing home residents participated voluntarily. They exposed to daylight from 9 to 10 A.M. and from 4 to 5 P.M. for 6 weeks. General health of all participants was ...

[ 27 ] - تعیین منابع اصلی مولد صدا در تجهیزات توربین در یک نیروگاه حرارتی تولید برق

Introduction: The Power plants are as the major industries that have a large number of workers, providing they health is important. Exposure to occupational noise is the pervasive physical agent in industries like power plants and may impact health and for safety status for people. Determination of the sources of noise in workplaces is important step in noise control plans. This study aimed to ...

[ 28 ] - بررسی میدان‌های الکترومغناطیس با فرکانس خیلی پایین (ELF) ساطع شده از لپ تاپ های متداول

Introduction: Electromagnetic field emitted by laptops are known as extremely low frequency (ELF) Waves. The aim of this study was to investigate the intensity of electric and magnetic field with extremely low frequency emitted by common laptops. . Material and Method: Intensity of electric and magnetic field were measured on four sides of 40 common by used laptop at the distance of 30, 60 and...

[ 29 ] - 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...

[ 30 ] - 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...

[ 31 ] - Efficiency Assessment of Acoustic Cabin for Providing Acoustic Comfort in Turbine Unit of a Thermal Power Plant

Background and Objective: A practical method for noise control in environments with different noise sources is designing an acoustic cabin for the workers. In this regard, this study aimed to assess the efficiency of the acoustic cabin in a typical turbine unit of a thermal power plant to provide acoustic comfort. Materials and Methods: Measurement of the noise level and spectrum, as well as v...

[ 32 ] - 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...

[ 33 ] - 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,...

[ 34 ] - Study of daytime lighting at official rooms and its relation with personnel's cognitive performance, alertness, visual comfort and sleep quality.

Background and Aim: Undesirable lighting the work environment causes visual and non-visual effects in employers. The aim of this study was to compare the quantity and quality of combined and artificial lighting in daytime and its relationship with the indexes of mental performance. Methods: This study carried out at 65 rooms and on 81 employees randomly selected from different clusters. Measur...

[ 35 ] - Assessing lighting and color Temperature In The Office Workplaces And Relationship To Visual Comfort

Background and aims: Lighting directly and indirectly affects employeeschr('39') mental health and their performance. Good lighting is required for good visibility of the environment and should provide a luminous environment that is human-friendly and appropriate for the visual task performed. Optimal lighting is one of the most important issues in providing the physical conditions of different...