• 한국산업보건학회지
• /
• 제1권2호
• /
• pp.144-153
• /
• 1991

This study was conducted to evaluate worker exposure to airborne asbestos fibers by industry, and to evaluate polarized-light microscopy for determining airborne asbestos fibers. A total of 11 plants including asbestos textile, brake-lining manufacturing, slate manufacturing, and automobile maintenance shops were investigated. Rsults of the study are summarized as follows. 1. Worker exposure levels to airborne asbestos fibers were the highest in asbestos textile industry, followed by brake-lining manufacturing, slate manufacturing, and automobile maintenance shops, in order. In asbestos textile industry, large variation of asbestos levels was found by plants. The worst plant indicated airborne fiber concentrations in excess of 10 fibers/cc, however, the best plant showed concentrations within 0.50 fibers/cc. 2. Characterization of airborne fibers by industry indicated that fibers from asbestos textile industry were the longest with the largest aspect ratio. Fibers from automobile maintenance shops were the shortest with the smallest aspect ratio. Based on characteristics of fibers and the highest levels of concentrations, it is concluded that workers in the asbestos textile industry are exposed to the highest risk of producing asbestosis, lung cancer, and mesothelioma. 3. Result s obtained using polarized-light microscopy were $43.7{\pm}12.3%$ of the results obtained using phase contrast microscopy. This may be resulted from the worse resolution of polarized-light microscopy than that of phase contrast microscopy. Based on the results, it is recommended that polarized-light microscopy be used for mainly bulk sample analyses and further study be performed to improve the method for determining airborne samples. However, polarized-light microscopy can be used for determining thick fibers.

• 한국안전학회지
• /
• 제25권6호
• /
• pp.47-52
• /
• 2010

Many industrial accidents have occurred over the years in the manufacturing and construction industries in Korea. However, as the service industry has increased continuously, the share of the accident rate in the service industry was 39.07% in 2009, while the manufacturing industry share was 33.73%. The service industry share overtook the manufacturing industry share for the first time. Therefore, this research considers prevention of industrial accidents in the service industry as well as manufacturing and construction industries. This paper describes a procedure and a method to estimate efficient accident rate forecasting and estimated zero accident time in the service industry in order to prevent industrial accidents in the transportation, storage, and telecommunication divisions. This paper proposes a model using an analytical function for the sake of very efficient accident rate forecasting. Accordingly, this paper has develops a program for accident rate forecasting, zero accident time estimating, and calculation of achievement probability through MFC (Microsoft Foundation Class) software Visual Studio 2008 in the transportation, storage, and telecommunication divisions. In results of this paper, ARIMA (Auto Regressive Integrating Moving Average) is regarded as a very efficient forecasting model for the transportation, storage, and telecommunication division. In testing this model, value minimizing the Sum of Square Errors (SSE) was calculated as 0.2532. Finally the results of this paper are sure to help establish easy accident rate forecasting and strategy or method of zero accident time in the service industry for prevention of industrial accidents.

• 한국산업융합학회 논문집
• /
• 제22권2호
• /
• pp.235-241
• /
• 2019

The shoe manufacturing process is very low compared to other industries due to the labor-intensive process. As automation and smart factories are becoming more and more automated, changes in the shoe manufacturing process are also needed. In this paper, we want to standardize the fuse manufacturing process by modularizing it. First, we defined the terms of shoeupper and fuse process, the shoe upper fuse process by function and classified it as a modular process. The fuse process can be modularized with pattern supply module, pattern recognition module, pattern laminate module, pattern waiting module, adhesion module, heat pressing module, transmission module, etc.

• Journal of Welding and Joining
• /
• 제32권4호
• /
• pp.10-14
• /
• 2014

Laser aided Direct Metal Tooling(DMT) process is a kind of Additive Manufacturing processes (or 3D-Printing processes), which is developed for using various commercial steel powders such as P20, P21, SUS420, H13, D2 and other non-ferrous metal powders, aluminum alloys, titanium alloys, copper alloys and so on. The DMT process is a versatile process which can be applied to various fields like the mold industry, the medical industry, and the defense industry. Among of them, the application of DMT process to the mold industry is one of the most attractive and practical applications since the conformal cooling channel core of injection molds can be fabricated at the slightly expensive cost by using the hybrid fabrication method of DMT technology compared to the part fabricated with the machining technology. The main objectives of this study are to provide various characteristics of the parts made by DMT process compared to the same parts machined from bulk materials and prove the performance of the injection mold equipped with the conformal cooling channel core which is fabricated by the hybrid method of DMT process.

• 시스템엔지니어링학술지
• /
• 제10권2호
• /
• pp.51-58
• /
• 2014

Manufacturing industry is one of the core sectors providing national competitiveness and economical impact Today's manufacturing industry is required to fulfill so called Sustainable Factory paradigm from the perspectives of environmental and social development. To cope with the requirements, researches for achieving sustainability in manufacturing system are actively carried out in the world from various perspectives. In this paper, we analyzed systemic characteristics of sustainable manufacturing system, and developed verification & validation strategy based on traceability between system requirement and functionality. The developed methods were applied to a European Project called the Foundation for the Sustainable Factory of the Future (FoFdation). Specifically, we analyzed and verified the deliverables of FoFdation by deriving systems architecture in terms of Component, Function, and Items. The results indicated that the FoFdation is pretty much compliant with the concept of Ubiquitous Factory, and can be used as an International Reference Model for the Smart Factoy, a world wide hot topic under the paradigm of IOT (Internet-Of-Things), if information processing part is supplemented.

• 한국컴퓨터정보학회논문지
• /
• 제21권11호
• /
• pp.141-149
• /
• 2016

In a rapidly changing global environment and the massive development in IT technology, Manufacturing SMEs have difficulties in lack of resources and competencies continued to have strong growth potential "Korean Hidden Champion(K Champ)". In order to overcome the difficulties of Manufacturing SMEs, we examined the core competencies using the AHP and proposed the K Champ development strategy. The implications in the academic is as follows: First, the suggestions for development strategy plan was drawn for the K Champ's core competencies with the recognized importance by the CEO or business executives. Secondly, the manufacturing SMEs were broken down by industry structural characteristics variables(sales amounts, industry sectors, business types and delivery methods) and the importance was investigated, analyzed and clarified. This study is intended to develop strategies of Gyeongsangnam-do manufacturing SMEs for K Champ such as German 'Hidden Champion'. We identified the importance of the level of core competencies and the coherent alternative policy direction and practical alternative were proposed. These mean the concrete relationship of core competencies for the K Champ transition and suggest a realistic directional needed for the local manufacturing SMEs in the proposed 'Government's Development Policy for Korean Hidden Champion'.

• 한국산업보건학회지
• /
• 제21권4호
• /
• pp.227-235
• /
• 2011

The objective of this study was to analyze 157 processes of 145 industries that exceeded Korean Occupational Exposure Limits (KOEL) for carcinogen during the 11 year period from 1999 to 2009. The data included number of industry and workers exposed, type of carcinogen and their exceeded ratio, type and size of industry in each year. These data were collected by 46 regional employment & labor offices in Korea using work environment monitoring reports. The result showed that, in each year, about 10 industries exceed their carcinogen exposure limit. The most common carcinogen exceeding KOEL were found to be formaldehyde, benzene, ethylene oxide and chromium VI. The carcinogen with the highest level of over-exposure were in the order of formaldehyde, benzene, ethylene oxide and asbestos. Fabricated metal product manufacturing industry were found to be most vulnerable against carcinogen with 11.1% of them exceeding carcinogen KOEL followed by electronic components manufacturing industry (8.3%), chemical products manufacturing industry (6.3%), and electrical equipments manufacturing industry (4.9%). The industry employing less than 50 workers had the highest percentage of exceeding carcinogen KOEL with 52.8%. The result also showed that strengthening KOEL for benzene and asbestos helped reduce the level of carcinogen over-exposure. Based on these results, strengthening the KOEL or new regulation turned out to help reduce the carcinogen over-exposure level. Benzene, ethylene oxide and chromium VI were the most frequently over-exposed carcinogen with the highest level. Therefore, these chemicals need to be regulated with a highest priority to improve the workplace environment. The results also show that the small-sized industries employing less than 50 workers was the most vulnerable against carcinogen exposures. Therefore, more government support are needed for these small-sized industries to help them to improve their workplace environment.

• 한국품질경영학회:학술대회논문집
• /
• 한국품질경영학회 1998년도 The 12th Asia Quality Management Symposium* Total Quality Management for Restoring Competitiveness
• /
• pp.11-20
• /
• 1998

This study investigates the current situation of the ISO 9000 manufacturing industry in Taiwan, analyzing the business influence of ISO 9000 and the relation of the influence to industry-related characteristics. The study utilized polling and was approached from six aspects, using 26 indicator items to evaluate performance. The six approaches consisted of business management, finance management, production management, human resources management, marketing management, and a company's overall situation. Methods used to analyze the collected data were mainly drawn from descriptive statistics e.g.. the T test and analysis of single factors with variation. The study found that $96.6\%$ of the industry thought that the introduction of the ISO 9000 series was somewhat beneficial. The 26 indicator items among the six approaches were proved substantially effective by the T test. It was obvious that the effect of the ISO 9000 series industry standard was beneficial and helpful to the manufacturing industry.

• 한국인쇄학회지
• /
• 제29권3호
• /
• pp.77-96
• /
• 2011

Most of all manufacturing industries are pursuing the manufacturing process innovation through the production process automation but the printing industry still does not get out of the analog ways of the entire process compared the entire manufacturing industry. Today, many printing enterprises have the difficulties by the short for delivery, multi-item small amount printing, high quality, rise in raw material cost, drop in receiving order cost, and etc. The printing industry can get over these difficulties and issues by implementing the compact workflow line, merge with the others, automatization and networking, minimization of the repetitive operation, efficiency of the working process, optimization of the operators' value creation, minimization of cost and materials and fast make-ready. The object of this thesis establishes the experimental data and study cases applicable in the printing industry by having high labor productivity and work in line with printing industry processes through "lean printing system".

• 한국산학기술학회논문지
• /
• 제18권3호
• /
• pp.185-198
• /
• 2017

2000년대 이후 국내 제조업 성장률은 지속적으로 하락하고 있으며, 매출 및 고용이 감소하고 있는 추세이다. 주요 선진국은 제조업 경쟁력 강화를 위한 다양한 전략을 수립하여, ICT 기술과의 융합을 통한 제조업 혁신을 도모하고 있다. 제조업 혁신의 핵심은 제품 설계 단계에서 모델링 및 시뮬레이션(M&S) 기술을 통해 신제품 개발 시간 및 비용을 절감하는 것이다. M&S 산업은 산업 가치사슬의 상위분야에 속하며, 타 산업으로의 파급효과가 큰 업종이다. 그러나 국내 M&S 기업의 역량은 선진국 대비 매우 취약한 상황이며, M&S 기업의 정의 및 분류조차 이루어지지 않고 있다. 본 논문에서는 한국표준산업분류를 분석하여 M&S 서비스 기업들이 포함되는 5개의 산업 세세분류를 도출하고, 11,822개의 관련 기업 중 3단계의 선정 절차에 따라 307개의 M&S 서비스 기업을 도출하였다. 이중 211개의 M&S 서비스 기업 현황을 조사하여 국내 M&S 기업의 역량을 분석하였다. 제조업에 대한 의존도가 높은 우리 경제의 특성을 고려할 때, 향후 지속적인 경제성장을 위해서는 고급 두뇌산업인 국내 M&S 서비스의 역량 향상 및 생태계 조성을 통한 제조업의 경쟁력 강화가 필요하다.