• 제목/요약/키워드: factory workers

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실내(室內) 온열환경지표(溫熱環境指標)의 평가방법에 관한 연구 (A Study on the Evaluation Methods of Indoor Thermal Comfort Index in Building)

  • 정창원;호리코시 데츠스미;윤인;최영식
    • 한국산업융합학회 논문집
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    • 제2권2호
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    • pp.11-21
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    • 1999
  • This objective of this paper is to investigate the evaluation and indiction of human thermal comfort in building environment. The issue of defining the boundaries of acceptable thermal comfort conditions in buildings and urban may have significant implication for building design and also may have urban design by climate considerations. And then it is to apply the thermal comfort condition to environmental design by using passive methods in Korea. Since 1920. architects have conducted studies to measure thermal comfort in houses under hot and humid conditions, while industrial hygienists have studied the effects of temperature and humidity on the performance of factory workers. Thermal comfort can be influenced by many variables. This paper conducted to review the previous researches and the human heat balance equation, and to analyse in order to reveal the meaning and usage of the thermal comfort index in two traditional essays, Fanger's PMV and Gagge's ET* Their comfort indexes compared with each other. They were based on human heat balance equation and psychological and physiological responses in the laboratory tests. The researchers and the architectural engineers using thermal comfort index shall be careful in decided the use of indexes and be necessary to recognize the value concept of the design criteria for thermal comfort. Therefore, The opinion of the authors is that different comfort standards have to apply for each building and urban with different climatic conditions.

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ACGIH Hand Activity Level TLV®의 현장 적용 및 평가 (Field Application and Evaluation of the ACGIH Hand Activity Level TLV®)

  • 김부욱;우지훈;강동묵;신용철
    • 한국산업보건학회지
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    • 제16권2호
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    • pp.81-90
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    • 2006
  • The Strain Index(SI) has been commonly used to evaluate the musculoskeletal disorders(MSDs) of upper extremities. Recently, the American Conference of Governmental Industrial Hygienists(ACGIH) adopted the Threshold Limit Value for hand activity level (HAL TLV) focused on the hand, wrist, and forearm. The MSDs risks of 37 repetitive works conducted at an automobile climate control system manufacturing factory were evaluated using both the HAL TLV and the SI, and the results by two methods were compared. Also, measured repetitive frequencies of upper limbs joint were mesured using electromyogram and electrogoniometer. The evaluation results of the HAL were related with the repetitive frequency data of upper limbs joint by electrogoniometer, and the NPF was related with %MVC of ECU. The evaluation result of HAL TLV was highly related with the SI score(r=0.66, p<0.01). Of total 37 tasks, 25 tasks(67.6%) were exceeded the TLV and 34 tasks(91.9%) exceeded the SI limit. Although there was a high relationship between the HAL TLV and SI score, the HAL TLV underestimated the risk in comparison with the SI. The correlation coefficients(r) between the HAL TLV data and the repetitive frequency of upper limbs joint were 0.45~0.55(p<0.01). The MSD symptoms was significantly different between high risk groups and low risk groups evaluated by HAL TLV(p<0.01), but was not different between two groups by SI. In conclusion, the HAL TLV is a proper tool for repetitive works.

공간분석·데이터마이닝 융합방법론을 통한 산업안전 취약지 등급화 방안 (Industrial Safety Risk Analysis Using Spatial Analytics and Data Mining)

  • 고경석;양재경
    • 산업경영시스템학회지
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    • 제40권4호
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    • pp.147-153
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    • 2017
  • The mortality rate in industrial accidents in South Korea was 11 per 100,000 workers in 2015. It's five times higher than the OECD average. Economic losses due to industrial accidents continue to grow, reaching 19 trillion won much more than natural disaster losses equivalent to 1.1 trillion won. It requires fundamental changes according to industrial safety management. In this study, We classified the risk of accidents in industrial complex of Ulju-gun using spatial analytics and data mining. We collected 119 data on accident data, factory characteristics data, company information such as sales amount, capital stock, building information, weather information, official land price, etc. Through the pre-processing and data convergence process, the analysis dataset was constructed. Then we conducted geographically weighted regression with spatial factors affecting fire incidents and calculated the risk of fire accidents with analytical model for combining Boosting and CART (Classification and Regression Tree). We drew the main factors that affect the fire accident. The drawn main factors are deterioration of buildings, capital stock, employee number, officially assessed land price and height of building. Finally the predicted accident rates were divided into four class (risk category-alert, hazard, caution, and attention) with Jenks Natural Breaks Classification. It is divided by seeking to minimize each class's average deviation from the class mean, while maximizing each class's deviation from the means of the other groups. As the analysis results were also visualized on maps, the danger zone can be intuitively checked. It is judged to be available in different policy decisions for different types, such as those used by different types of risk ratings.

RDS(Robotic Drilling System) 구축을 위한 전용 End-Effector Prototype 개발에 관한 연구 (A Study on the Development of a Specialized Prototype End-Effector for RDSs(Robotic Drilling Systems))

  • 김태화;권순재
    • 한국기계가공학회지
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    • 제12권6호
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    • pp.132-141
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    • 2013
  • Robotic Drilling Systems(RDSs) set the standard for the factory automation systems in aerospace manufacturing. With the benefits of cost effective drilling and predictive maintenance, RDSs can provide greater flexibility in the manufacturing process. The system can be easily adopted to manage very complex and time-consuming processes, such as automated fastening hole drilling processes of large aircraft sections, where it would be difficult accomplished by workers following teaching or conventional guided methods. However, in order to build an RDS based on a CAD model, the precise calibration of the Tool Center Point(TCP) must be performed in order to define the relationships between the fastening-hole target and the End Effector(EEF). Based on the kinematics principle, the robot manipulator requires a new method to correct the 3D errors between the CAD model of the reference coordinate system and the actual measurements. The system can be called as a successful system if following conditions can be met; a. seamless integration of the industrial robot controller and the IO Level communication, b. performing pre-defined drilling procedures automatically. This study focuses on implementing a new technology called iGPS into the fastening-hole-drilling process, which is a critical process in aircraft manufacturing. The proposed system exhibits better than 100-micron 3D accuracy under the predefined working space. Based on the proposed EEF fastening-hole machining process, the corresponding processes and programs are developed, and its feasibility is studied.

자동차 페인트 도장공에 있어서 컴퓨터를 이용한 신경행동검사 수행기능의 평가 (Effect on Computerized Neurobehavioral Test Performance of the Car Painters Exposed to Organic Solvents)

  • 사공준;정종학
    • Journal of Preventive Medicine and Public Health
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    • 제27권3호
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    • pp.487-504
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    • 1994
  • A cross-sectional study was performed to evaluate the effects of chronic low-dose solvent on neurobehavioral performance of 118 male car painters. A control group of 113 workers matched for age was selected from different sections of the factory. The mean age and the mean duration of employment were 33 years and 6.7 years in both groups. Mean years of education were 11.4 years in car painters and 11.8 years in controls. Each worker completed a medical and occupational questionnaire and four tests of Swedish performance evaluation system. These included simple reaction time, symbol digit, digit span and finger tapping speed. Althougth the mean duration of employment was 6.7 years, comparison of mean performance showed a significantly poorer performance on simple reaction time (p<0.05), symbol digit(p<0.01) and digit span(p<0.05) in car painters. In univariate analysis, age and educational level contributed to poorer performance on symbol digit and digit span. Smoking appeared to slow finger tapping speed in car painters. Performance of four tests of car painters exposed to high level of solvent was poorer than that of car painters exposed to low level. In multiple regression models, controlling for age, alcohol, smoking and shift work, solvent exposure was found to be associated with performance of simple reaction time, symbol digit and digit span and exposure to high level of solvent was related to poorer performance of symbol digit and digit span.

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중소기업 혁신능력 향상을 위한 정책적 접근 : 지역혁신 클러스터 관점 (A policy approach to enhance the innovative activities of SMEs using regional innovation cluster)

  • 한정희
    • 한국산학기술학회논문지
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    • 제7권6호
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    • pp.1396-1406
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    • 2006
  • 지역혁신체계, 클러스터의 목표는 이를 통하여 지역 중소기업의 기술경쟁력 강화에 있는 것이지 클러스터 자체의 형성에 있는 것은 아니다. 중소기업은 지역 경제발전의 중심에 있다. 지역혁신체계, 클러스터의 성공은 중소기업의 혁신(기술개발)능력 향상에 달려 있다. 기술개발 능력을 위해선 기술자 간의 네트워크를 발전시키고 지역 언론 매체들이 클러스터에 적극 참여하여 제품 혁신에 기여 하여야 한다. 대학은 기술지도 및 연구인력, 교육프로그램을 보다 다양하게 기업에게 제공해 주어야 하고 지방정부는 참여자들의 네트워크 접촉점이 많도록 하는 역할을 해야 한다. 다시 말해 지역 기업의 기술개발을 위해서는 이에 필요한 다양한 지식이 확산되어야 한다. 본 연구에서는 지역 중소기업의 혁신능력 향상을 위해 지역혁신클러스터내의 각 주체들의 바람직한 역할 및 정책을 제시하고자 한다.

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도금 사업장 근로자에게 발생한 시안화수소 급성중독과 작업환경평가 (Acute Hydrogen Cyanide Poisoning in a Plating Worker and Workplace Measurement)

  • 함승헌;최원준;이준형;임용수;강지현;강성규
    • 한국산업보건학회지
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    • 제29권3호
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    • pp.336-342
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    • 2019
  • Introduction: An unexpected death was reported in a beginner immediately after starting the work at a plating factory. After the incident, air sampling was performed using a simulation of the situation as it had been at the time. Methods: To evaluate the airborne concentration of hydrogen cyanide, a total of six samples were collected: one personal sample, three area samples, and two background samples (office and outdoors). Hydrogen cyanide measurement was performed according to the standard sampling protocol recommended by the U.S. NIOSH (National Institute of Occupational Safety and Health). Results: The highest concentration of hydrogen cyanide was 0.938 ppm measured in a sample collected from the plating bath area with local exhaust ventilation. This value was approximately 20% of the ceiling occupational exposure limit. The personal sample showed a concentration of 0.135 ppm. Samples collected near the bath in which the incident occurred and a dehydrator showed hydrogen cyanide concentrations of 0.236 ppm and 0.101 ppm, respectively. Hydrogen cyanide was not detected in the background samples (office and outdoors). Conclusions: It is necessary to use proper ventilation systems and respirators in plating factories to prevent acute poisoning. Furthermore, it is important to educate and train new workers dealing with toxic substances.

우리나라 재래공업 산지의 사회적 분업 - 담양죽제품과 여주 도자기 산지를 사례로 - (Social division of labor in the traditional industry district - foursed on Damyang bamboo ware industry of Damyang and Yeoju pottery industry of Yeoju, South Korea)

  • 박양춘;이철우;박순호
    • 대한지리학회지
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    • 제30권3호
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    • pp.269-295
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    • 1995
  • 본 연구에서는 담양 죽제품과 여주 도자기 산지를 사례로 재래공업 존립의 중요한 요소인 산지내 사회적 분업의 실태, 특성 그리고 의의를 밝히고자 하였다. 산지내 사회적 분 업은 주로 원자재조달과 제품생산, 제품생산과 제품판매간에 이루어지고 있으며, 생산공정상 의 사회적 분업 및 제품생산 부문과 그 관련시설, 기계제작 부문간의 사회전 분업은 부분적 으로 이루어지고 있다. 그 성격에 있어서는 담양 죽제품산지는 산지완결형의 그리고 여주 도자기 산지는 미산지완결형의 특성이 강하다. 그리고 사회적 분업체계를 구성하는 기업들 은 독자성을 가진 수평적 분업체계를 유지하고 있으나 수요변화에 적극적으로 대응하기 위 한 신제품의 개발과 판로개척을 선도할 수 있는 기업이 밭달하지 못하고 있다. 산지존립에 있어서의 사회적 분업의 의의로는 생산공정의 세분화와 업종분화를 통해서 노동력 부족을 극복함과 동시에 생산비를 절감할 수 있고 소자본의 신규참여를 용이하게 하고 경기변동에 따른 위험부담을 분산하며 다방면에 걸친 축적된 노-하우를 활용한 업종과 제품의 전환을 통하여 제품의 다양화와 제품수명주기가 연장된다는 점을 들 수 있다.

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보건관리형태에 따른 산업보건에 대한 지식, 태도 및 실천 (Knowledge, Attitude and Practice according to Types of Occupational Health Management)

  • 김성희;신혜련;김상우;우극현;박완섭;박재용
    • Journal of Preventive Medicine and Public Health
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    • 제29권3호
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    • pp.579-596
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    • 1996
  • 중소영세 섬유업체 근로자들 1,138명을 대상으로 자기기입식 설문조사를 하여 근로자의 보건관리형태에 따른 산업보건에 관한지식, 태도 및 실천의 정도를 비교하고 다음으로는 집단보건관리군 694명만을 대상으로 하여 집단보건관리 기간이 지식, 태도 및 실천에 미치는 영향을 알아보고자 하였다. 1. 보건관리형태에 따라서 산업보건에 관한지식, 태도 몇 실천의 평균점수는 개별보건관리군에서 모두 높았으나 실천의 점수만 통계적으로 유의한 차이를 보였다. 그러나 비교하고자 하는 두 집단간에는 대부분의 일반 특성이 유의한 차이가 있으므로 이를 교정하고자 중회귀분석을 실시하였다. 중회귀분석 결과, 지식에 유의한 영향을 미치는 변수는 연령, 교육 수준, 총 근무기간이었고, 태도에 유의한 영향을 미치는 변수는 연령, 교육수준, 결혼상태였다. 실천에 유의한 영향을 미치는 변수는 성, 연령, 교육수준, 결혼유무, 총 직장근무기간이었다. 연구의 목적인 보건 관리형태별로 비교시는 지식, 태도 및 실천에 미치는 영향은 집단보건관리군의 경우 지식의 평균점수가 조금 높았을 뿐이며, 태도 및 실천의 점수는 낮았다. 그러나 두 가지 보건관리형태에 따른 유의한 차이는 없었다. 2. 집단보건관리군에 국한하여 분석한 결과, 보건관리기간(개월수)은 대상 근로자들의 산업보건에 관한 지식, 태도 및 실천 모두에 유의한 영향을 미친다고 할 수 있다.

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영세사업장 보건관리 지원사업 실시 전후의 산업보건수준 비교 분석 (A Comparative Analysis of the Level of Occupational Health : Before and After the Subsidiary Program on Health Care Management of Small Scale Industries)

  • 정혜선
    • 한국직업건강간호학회지
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    • 제4권호
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    • pp.58-83
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    • 1995
  • The small scale industries which have less than 30 employees occupy 86.5% of total number of industries in Korea. And though they have higher accident rate and lower environmental condition than big industries, it has been not mandatory to appointing health care manager at factory. So, from 1993, government subsidizes to the health care management of small industries. The purpose of this study is to identify the real feature of health care status in small industries, and to evaluate the level of health care management, before and after the subsidiary program. 65 small plating industries which have been managed by the same health care management support institution in 1993 were selected for study. Of the 65 industries, 3 which have not taken both environmental evaluation and health screening in 1994, and 9 which have closed were excluded from study sample. And the remaining 53 were analyzed by using the results of environmental evaluation and health screening, reported to the Ministry of Labor, before and after the subsidiary program, the analysis was done by the comparison of the two year paired data of the same industry. Over-permissible-limit rate, health screening implementation rate, above grade C rate were calculated and compared. The status of health care management ; 1. Of the sample industries, 96.9% provide protective equipment and 80.0% set up ventilating system. Protective gloves (89.2%) and protective clothing (80.0%) are widely provided, but ear plugs (4.6%) are rarely provided. 21.5% of the protective equipment are well put on, and 40.4% of the ventilating systems function well. 2. In 1993, 35 industries, 53.8% of the sample, checked working environment twice. Over-permissible-limit rates of heavy metal (12.2%), suspended particle (11.1%), noise (5.5%) were high. To put on protective equipment and to set up local ventilating system were pointed out by the examiners. 3. General health screening was done at 63.1% of the sample industries and 35.3% of total workers were examined. Specific health screening was done at 93.8% of the sample industries and 75.4% of workers were examined. 15.5% of workers was provided to be above grade C and to have digestive system disease (43.3%), circulatory disease (18.9%), and hematopoietic disease (14.2%), etc. 4. In 1993, the subsidiary program of health care management was provided in forms of health education, health counseling, and rounding check of working field. And 61.5%, 83.0%, 55.4% of sample industries respectively received it. The average visit per industry was 1.8. Comparisons of the level of occupational health before and after the subsidiary program ; 1. Over-permissible-limit rates of hazardous factors of 1993 and that of 1994 were compared. The rates of suspended particle, noise, organic solvent of 1994 (37.5%, 13.4%, 24.2% respectively) were higher than that of 1993 (25.0%, 6.0%, 6.3% respectively). In the case of acid, there was no difference between the rate of 1993 and that of 1994. Only the rate of heavy metal decreased from 12.9% in 1993 to 3.0% in 1994. 2. General health screening was done at 38.7% of the sample industries in 1993 and at 44.6% in 1994. But the implementation rate of specific health screening decreased from 72.4% in 1993 to 64.6% in 1994. 3. The implementation rate of specific health screening was analyzed by some health factors. The rate of suspended particle increased from 61.8% in 1993 to 91.2% in 1994. But the rates of the others-noise, organic solvent, heavy metal, specific chemical substances-decreased. 4. Above grade C rate in health screening increased from 27.8% in 1993 to 35.5% in 1994. But that of endocrine disorders and pulmonary disease decreased.

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