• 제목/요약/키워드: IT Equipment Industries

검색결과 261건 처리시간 0.027초

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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신형 수이젝터 개발을 위한 실험연구 (Experimental Study of the Development of New Type Water Ejector)

  • 최현규;문수범;최순열;최순호;김경근
    • 한국마린엔지니어링학회:학술대회논문집
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    • 한국마린엔지니어링학회 2005년도 후기학술대회논문집
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    • pp.35-36
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    • 2005
  • An ejector driven by a liquid is a fluid transfer equipment to be used under a poor suction condition, which means that there exists a possibility to occur a cavitation. It is a highly reliable device because it has no movable part in it, that is only a passive equipment. The ejector is an inevitably necessary one to overcome a poor pumping condition and to mix uniformly two fluids, however it has a low efficiency since it requires a pump for its operation. This study is for the development of a new-type liquid ejector with the application of a nozzle shape alteration, which maximize the suction performance of it. which provides the increased competition with the domestic industries. Also, the increased performance opens a new manufacturing method to use a commercial pipes for the production of an ejector, which is based on a trivial loss of a performance. However, this minor loss can be sufficiently compensated by the increased performance of a new-type ejector. Therefore, the developed ejector by this study can considerably reduce the manufacturing time and cost while its performance is largely increased.

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알루미늄 합금 소재의 옥살산 아노다이징 피막 물성 연구 (A Study on the Properties of Anodic Oxide Films Formed on Al Alloys in Oxalic Acid)

  • 정나겸;박지현
    • 한국표면공학회지
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    • 제53권5호
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    • pp.249-256
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    • 2020
  • As the size of manufacturing equipment for LCD and OLED displays increases, replacement of existing heavy stainless steel components with light metals, such as aluminum alloys, is being more important in semiconducting and display manufacturing industries. To use aluminum alloys for components in semiconducting and display industries, it is important to develop a new anodization method for improved performance of anodic oxide films than conventional anodization method based on sulfuric acid. In this work, optimum applied current density and the best sealing methods for anodic oxide films in 3% oxalic acid were explored. Experimental results showed 2.5 A/dm2 is the best applied current density for improved hardness and dielectric breakdown voltage. Sealing of the anodic oxide films further improved their hardness, dielectric breakdown voltage and resistance to HCl, by which application of anodic oxide films become applicable for components in semiconducting and display industries.

160K LNGC 멤브레인 화물창에 작용하는 슬로싱 충격 하중에 대한 비교 실험 연구 (Comparative Experimental Study on Sloshing Impact Loads of LNG Cargoes in Membrane Containment System of 160K LNGC)

  • 권창섭;이영진;김현조;이동연
    • 대한조선학회논문집
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    • 제56권2호
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    • pp.103-108
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    • 2019
  • A new state-of-the-art sloshing research equipment has developed to perform the model test of LNG tanks for the safer design of LNG cargo containment system in violent sloshing phenomena. This sloshing test system has developed by the Samsung Ship Model Basin (SSMB) and thoroughly verified. The accuracy of the motion of hexapods equipment for the excitation of a model tank has been verified. The maximum displacement in six degrees of freedom, harmonic motions of various frequencies, and irregular motions in wave conditions are measured and compared with input signals. In order to confirm the reliability of the post-processing program for measured impact pressure, the post-processed results were compared with those of the reference institute. A benchmarking sloshing test using 1/50 scale model of 160K LNGC tank was conducted for the verification of the whole testing system. The partial filing levels were considered. As a result of the experiment, it is confirmed that the results are in good agreement with those of the reference institute.

산업별 O2O 결합 서비스의 비즈니스 투자 및 운영에 관한 연구 (A Study on the Business Investment and Operation of O2O (Online-To-Offline) Combined Services by Industry)

  • 정병호;주형근
    • 디지털산업정보학회논문지
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    • 제18권2호
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    • pp.93-110
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    • 2022
  • The purpose of this study is to explore business investment and operation of O2O (Online-To-Offline) combined service. The study will analyze the necessary factors for growing the business by dividing the O2O service by industry. The Online-to-Offline is a method of inducing purchases of products and services by connecting between online and offline This research methodology organized the four stages of the analysis process. The analysis of all stages was performed with association rules in big data techniques. It is divided into the start-up period, growth period, maturity period, and decline period, and analysis is conducted on the business investment, expenditure cost, business operation, and conflict factors. As the research result, the first analysis has shown commonality with government subsidies, bank loans, and personal funds in all industries. The second analysis showed a lot of expenditure on labor costs of internal employees, marketing/sales, facility facilities, equipment, and equipment purchase costs. The third analysis showed difficulty in raising the investment resources necessary for business operations in all industries. The last analysis showed conflicts in the industry, businesses license, legal systems, and small business owners in all industries. This study contributed to the abundance and diversity of research methodologies in management information systems using association rules. In addition, the description of organizational development theory was updated while explaining the business investment and operation of O2O combined services. In practical implication, the O2O services include environmental factors that cause convergence between industries. Accordingly, this is required for new O2O services through new laws and systems and reorganization of existing laws and regulations.

Curve Fitting을 이용한 건설장비 CO2 배출량 예측 모델 (A Prediction Model of CO2 Emissions for Construction Equipment Using Curve Fitting)

  • 노재윤;김유진;이지연;이민우;한승우
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2020년도 봄 학술논문 발표대회
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    • pp.107-108
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    • 2020
  • The severity of the global climate crisis is increasing due to greenhouse gases caused by human activities. As a result, countries and industries are making efforts to reduce carbon dioxide emissions, the biggest cause of global warming. Many studies have been conducted to predict carbon emissions in the construction sector to reduce this, but they have not actually produced a highly usable formula in the field. Therefore, the two variables 'Curve Fitting' were performed based on the data of excavators and trucks measured at the field. As a result, we have obtained a carbon dioxide emission prediction model for construction equipment, and we would like to use it to help establish an eco-friendly process plan.

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휠로더의 작업장치 링크 특성 분석을 통한 수평 인양 최적화 (Optimization of Parallel Lift of a Wheel Loader Through Analysis of Working Characteristics of Links)

  • 박현규;장진석;유완석;김민석;이희종
    • 대한기계학회논문집A
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    • 제40권4호
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    • pp.389-395
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    • 2016
  • 휠로더는 건설 현장뿐만 아니라 운반, 제조업에도 다양한 용도로 범용적으로 활용된다. 따라서 작업장치 기본 설계 시에는 작업성능뿐만 아니라 버켓의 각도변화 등 작업사양을 만족시키는 설계 안을 도출 해야 한다. 본 연구에서는 다물체 동역학 해석을 통하여 휠로더 작업장치 특성 분석 프로그램을 개발하여 작업장치 기본설계 시 활용할 수 있도록 하였다. 또한 본 프로그램과 최적설계 프로그램의 연동을 통해서 Z-bar 타입 휠로더 작업장치의 작업사양을 개선하였다. 개발된 프로그램을 활용하여 작업장치 설계 시 작업장치 컨셉에 따른 기본설계방안을 도출하는데 소요되는 시간을 절감할 수 있을 것이다.

축산시설의 기계 및 설비 산업의 기술 수준 분석 연구 (Study on the Technological Levels for the Industries Manufacturing the Machinery and Equipment for Livestock Production Facilities)

  • 장동일;장홍희
    • 한국축산시설환경학회지
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    • 제2권1호
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    • pp.13-25
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    • 1996
  • 본 연구는 국내 축산시설의 기계 및 설비에 대한 기술의 실상을 파악하고 이를 기초로 하여 미래의 축산시설 기술 발전 방향을 제시할 목적으로 수행되었으며 그 결과는 다음과 같다. 1. 축산시설 산업에 대한 현황과 수준을 조사 분석한 결과에 의하면, 전 기종의 시장점유율이 60% 이하이고, 또한 선진국의 설계 기술 수준을 10점으로 했을 때 대부분의 기종이 8점 이하로 평가되어 국내의 설계 기술 수준이 낙후된 것으로 나타났다. 2. 연구 개발 부문의 종사 비율은 10.7%로 타 부문에 비하여 현저히 낮게 나타났으며, 연구 설계 인력의 학력은 전문대졸 사원이 44.4%로 주축을 이루고 있는 것으로 나타나 기술 발전을 위해서는 연구 개발 및 설계 부문에 대한 투자를 늘려야 할 것으로 분석되었다. 3. 설계기술 분야에서 축산시설의 취약 기술 및 개발 분야는 만능수확기와 기계 제작 설계 분야로 나타났는데, 만능수확기의 경우 국내 농지 여건에 맞는 다목적용 만능수확기를 개발해야 하고, 기계 제작 설계의 경우 재료의 강도, 경도 및 내구성을 높여야 할 것으로 분석되었다.

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다중선형회귀분석 기반 건설장비 이산화탄소 배출량 예측모델 개발 (Development of prediction methodology from CO2 emissions of construction equipment based multiple linear regression)

  • 권재민;이재학;조민도;최영준;한승우
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2019년도 추계 학술논문 발표대회
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    • pp.38-39
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    • 2019
  • Environmental problems caused by GHG emitted by various industries are emerging around the world, and accordingly, relevant regulations are being applied by countries around the world. Korea is operating a carbon credit system that trades GHG in industry for money, which is expected to be applied to the construction industry. In addition, construction equipment using fossil fuels accounts for the largest portion of $CO_2$ emissions in the construction industry, and the importance of $CO_2$ reduction and prediction is increasing. However, there is a lack of data on the directly measured $CO_2$ emissions of construction equipment and there is no accurate methodology for measuring methods. Therefore, in this study, independent variables were derived based on the $CO_2$ emission data. In addition, multiple linear regression is performed for each independent variable to derive a predictive model of carbon dioxide emission by work type of construction equipment. It is expected that the construction process plan based on environmental factors in the construction industry can be established in the future.

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$SF_6-N_2$ 혼합가스의 정.부극성 뇌충격전압에 대한 50% FOV와 V-t 특성 (50% Flashover Voltage and V-t Characteristics for $SF_6-N_2$ Mixtures under Positive & Negative Ligtning Impulse Voltage)

  • 송원표;김정달;고희석;김동의;권영한;조규복;이철현
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1991년도 하계학술대회 논문집
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    • pp.300-303
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    • 1991
  • Sulphur-hexafluoride has extensively been used as an insulating gas of electric power equipment in substation for its high dielectric strength, non-toixity and non-flammable properties. But it is very expensive and is liquidizable under the condition of low temperature and high pressure. And it is very sensible to the locally high electric field strength. To resolve these problems, we studied 50% FOV and V-t characteristics of $SF_6-N_2$ mixtures under positive and negative lightning impulses using a 25mm rod-plane gap. 50% FOV of $SF_6-N_2$ 50% mixture was about 85% of pure $SF_6$ and it was known that $SF_6-N_2$ mixtures can be used as an economic substitution insulating gas for $SF_6$.

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