• KIEAE Journal
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• v.4 no.3
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• pp.71-78
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• 2004

Apartment housing is a widely-spread type in Korean housing market. Nevertheless, it has caused serious problems such as traditional community corruption, unsafe structure, defects and litigation from noise. Noise, especially in concrete structure for apartment housing, is hardly controlled in proper to prevent sound transmission between upper and lower families with existing system. In foreign countries, there are floating floor system to enhance the noise control performance in multi-family housing. This study is to examine the impact sound insulation performance of floors according to the different P'yong and Layers by field measurement in highrise building.

• KIEAE Journal
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• v.4 no.3
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• pp.37-44
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• 2004

In this study, foreign and domestic noise criteria on walls, floors, and water supply facilities were reviewed and the results are as follows : regulation can be divided two things, one is on thickness the other is sound insulation performance. Green Building regulation based on the law and this have sound classification systems. Since these regulations are not established in Korea. The noise regulation on water supply-drain facilities and domestic guideline on interior noise level is needed. Foreign regulations are stricter than those of ours. And those has sound classification system for the better acoustic condition of inhabitants'.

• Proceedings of the Korea Concrete Institute Conference
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• 2010.05a
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• pp.409-410
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• 2010

Since the 1980s with the development of construction techniques over 100 floors above 50 floors of the skyscraper was in progress. The advent of high-rise buildings due to an increase in foundation thickness was inevitable. at the moment, construction period and economic efficiency can be improved from decrease of the foundation thickness.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.05a
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• pp.53-58
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• 2001

Floor impact sound has caused many acoustical complaints to the apartment building dwellers. The concrete floating floor construction is one of the most reasonable way to reduce floor impact sound. Recently, many damping materials are used in apartment buildings. In this study, to evaluate floor impact sound insulation performance, field tests were carried at five building floors with damping materials. The test results of impact sound insulation performance for five buildings showed good improvement in light weight impact sound after installation of damping materials, but heavy weight impact sound wasn't improved.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2001.05a
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• pp.635-641
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• 2001

This study introduces the basic concepts of the vibration reducing methods and presents a case study of 'A' apartment construction site which located nearby railroad. The site is only 60m away from the railroad. Therefor much noise and vibration damages could be expected during train or any other transportation's passing. Especially, the first and second floor may suffer much vibration with the low frequency radiation noise from the walls and floors. This study estimates the noise level of indoor area by measuring the vibration of indoor walls and floors. From this result, vibration barrier, as a method to reduce the noise level which exceeds proper standard value, was attempted to protect vibration transmit from the railroad.

• Economic and Environmental Geology
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• v.16 no.4
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• pp.253-256
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• 1983

Recently, excavation of ancient pottery kiln of Koryo celadon of the Koryo dynasty have been continued since 1979 in Hang-dong, Daegu-myun, Gangjin-gun, Jeonnam Province, south-western part of Korea. The authers carried out an archeomagnetic study using the baked earth of the floors of the kiln, togimi and fabrics of rocks which were placed firmly on the floors of the kiln. These specimens were measured using the astatic magnetometer. The results of measurements are: declination, $0.3^{\circ}W$; inclination, $52.9^{\circ}C$. Referring to the secular change curves drawn from the studies of the south-western Japan, the last period when the pottery kiln was fired finally is estimated to be around A.D. 1170. Many potsherds of Koryo celadon were excavated around the kiln. According to the shape of these potsherds, the age of the pottery kiln is estimated to be 10-12 C, which is consisted with this study.

• Asian Journal of Turfgrass Science
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• v.8 no.3
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• pp.149-165
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• 1994

This report was investigated on the soil and mineral nutrient erosions in comparison among the vegetation floors of M isranthus sisensis, Arternisia stelleriana, Rhododendron mucronula turn, Zoysia ja-ponira and Pinus deusitlora communities and the naked soil on Mt. Keum-hak in Cheolwon-Koon, The erosion of clay, silt, fine sand and coarse sand of the surface soils under the Z. japonira grass-land was far less then those of M. sinensis, A. stelleriana, R. murronulatum and P. densiflora com-munities and the naked soil, The loss of mineral nutrients due to the soil erosion was the lowest level in the Z. japonira grassland and the highest level in the P. densiflora forest and the naked soil, respectively.

• Proceedings of the Safety Management and Science Conference
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• 2002.11a
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• pp.157-163
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• 2002

Automated manufacturing systems are applied to shop floors as a tool for the increase of productivity and quality and the decrease of manufacturing lead times and industry accidents. One of the most important issue of the present day is the application of Internet. The development of Internet technologies makes manufacturing enterprises break spacial barriers between users and shop floors, and collect various field data in remote sites. In this research, an Internet-based remote control system for a small-sized automated storage and retrieval system is developed for the purpose of real-time monitoring and control of automatic production equipment. The developed system has a client-server architecture and transmits real-time images of the automated storage and retrieval system to a client by ar CCD camera connected to a server. Based on the transmitted images, the client sends commands to PLC of the server, and part storage and retrieval tasks are executed.

• Journal of the Korea Safety Management & Science
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• v.18 no.3
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• pp.81-89
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• 2016

Floor slipperiness is a leading cause in slip and fall accidents which are a major source of occupational injuries in Korea. Researchers have estimated the slip and fall related accidents rank number one or two in number of the injured. The objectives of this study were to find the field contamination effect and improvement countermeasure. Slipping and falling are common accidents in large public facilities, especially facility which vulnerable adults generally use as like hospital. So, we measured the coefficient of friction of several floors on the floor in hospital, under dry and wet using BOT-3000. The results of the coefficient of friction measurements showed that floor type and surface conditions were all significant factors affecting the coefficient of friction. The most surprising finding of this study was that there were significant friction improvement when the floors were properly cleaned with cleaning equipments.

• Journal of the Korea Safety Management & Science
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• v.10 no.1
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• pp.215-224
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• 2008

Recently, product life-cycles are shortening faster than ever before, and companies with a suggestion system are in better position to overcome this shortening life-cycle and thus promote customer satisfaction. Suggestion systems, however, are not actively utilized on the production floors in many firms. This study showed that small-sized and medium-sized firms where a suggestion system is properly functioning by a strong will of top management are not many in Gangwon-do area. In considerable number of companies, a suggestion system is informally and spontaneously applied by the workers on the production floors not by company-wide systems. A suggestion system is required as a means of creating future value-added and it is a matter of course that the role of top management, together with middle-class managements' influence is quite important in the course of the successful application of it. A suggestion system, to be successful, calls not only individual efforts but also positive corporate cultures.