• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.28 no.4
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• pp.393-405
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• 2018

Objective: This study examines the types of hazardous factors in the working environment and the time-trend for their exposure levels over 10 years (2007 to 2016). Study Design and Method: The types of hazardous factors and exposure levels were drawn from the 19 measurement reports on the working environment over 10 years at a shock absorber manufacturing facility. Risk assessment of the types of factors and time-trend of exposure levels were evaluated using the factors and exposure levels. Results: A total of 34 hazardous factors were evaluated. The types were noise, 15 organic compounds, seven kinds of acid sand alkalis, eight kinds of heavy metals, and three other compounds. Special management materials used were nickel, hexavalent chrome, and sulfuric acid. Human carcinogens (1A) used were trichloroethylene, nickel, and sulfuric acid. There were six types of substances belonging to the IARC's 2B (body carcinogens) classification or higher, including, methyl isobutyl ketone, ethyl benzene, and trichloroethylene. No detection was found for 627 out of the 2065 total measurements in 19 exposure survey reports, representing 30.4%. Organic solvents, acid and alkali products, and heavy metals showed continuous low exposure concentrations. Noise, welding fumes, and the evaluation of mixed solvents show a gradual decrease in geometric mean and maximum over the time-trend of 10 years. Conclusions: In the case of a shock absorber manufacturing facility, the hazardous factors of noise and the evaluation of mixed solvents still indicate high concentrations exceeding the exposure limits and necessitate reduction studies. These two factors and welding fumes showed a continuous decrease in their ten-year tendency. Organic compounds, acids/alkalis, and heavy metals were managed smoothly in a work environment of continuous low concentrations.

• Proceedings of the Korean Fiber Society Conference
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• 1993.06b
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• pp.722-728
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• 1993

• Proceedings of the Korea Society for Industrial Systems Conference
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• 1999.12a
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• pp.289-299
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• 1999

• Journal of Industrial Technology
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• v.2
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• pp.77-81
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• 1982

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.3
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• pp.1626-1629
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• 2015

In this paper, the development trend of Army force power in Korea is observed and analyzed. It can be checked that unmanned technology has been actively researched and many diverse defense Acquisition system are under development in Future Combat System. Some of such examples are enough worth to be benchmarked for Korea's related research and development activities for future unmanned combat systems. The result of survey and analysis on development trend on Army force power the further establishment of domestic technology research direction as well as viable benchmarks for the future unmanned combat systems.

• Journal of Korea Game Society
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• v.17 no.4
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• pp.7-16
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• 2017

In this thesis, the objective is to identify and analyze trends in the evolution of virtual reality in the midst of the trend of digital content and the trend of the 4th industrial revolution. The analysis is divided into devices, development, distribution platforms and content fields, which are divided into active, static, and classical content and trend. This thesis is meaningful as a basic material in the planning stage of virtual augmented reality contents.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.11
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• pp.7957-7963
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• 2015

R&D trend for Auxiliary Power Supply(APU) of electric vehicle can be well understood by analyzing patents at home and abroad. Based on this trend analysis, domestic technology development direction is proposed. To get technique trend, patents of Korea, Japan, Europe and America published until February of 2014 are analyzed by WIPS DB. First, power converter and transformer two big category are classified. Power converter can be classified into resonant DC to DC converter and resonant Half bridge inverter; transformer can be classified into high frequency transformer, ferrite transformer and matching transformer. By analyzing R&D trend of different counties, companies and years, specific technology needed to be developed and trend of technology can be accurately grasped.

• Journal of Industrial Convergence
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• v.17 no.2
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• pp.21-27
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• 2019

The Internet of things is the infrastructure that can communicate with each other by exchanging information by installing antennas that can communicate with all things in the world. The reason why the Internet of Things is the core of the Fourth Industrial Revolution is that data is collected through the Internet to be. Technology of things Internet and Trend of Things Internet IoT (Internet of Things) is a concept that enables internet connection and communication between devices equipped with various sensors. It is the core IT trend of lot, technology such as big data, mobile, cloud And to provide information for the development of the industrial environment through research on the importance of the Internet of things, the core of the Fourth Industrial Revolution and the processing and analysis techniques of Big Data. By providing various security measures and future technologies, This study was conducted to contribute to management.

• Journal of Korea Foundry Society
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• v.27 no.5
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• pp.193-197
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• 2007

• Proceedings of the Korea Society of Design Studies Conference
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• 2004.05a
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• pp.36-37
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• 2004