• YAKHAK HOEJI
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• v.12 no.1_2
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• pp.32-34
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• 1968

Aconitum Uchiyamai NAKAI "geu-neul-dol-che-gi"(Ranunculaceae), is geographically distributed only in Korea. An aconite collected at Mt. Dukwoo, Kangwon-Do flowers with white color in October. The aconite is different from Aconitum Uchiyamai NAKAI from the point of anatomical and morphological views in transplanted and collected aconites. Being a new variety of Aconitum Uchiyamai NAKAI, this aconite is anounced under the name of Aconitum Uchiyamai NAKAI var. albiflorum CHUNG et RIM, "Hin-geu-neul-dol-che-gi" called in Korea. Aconitum Uchiyamai NAKAI var. albiflorum CHUNG et RIM Differt a planta Aconitum Uchiyamai NAKAI per colorem album.

• Journal of the Korean Society of Manufacturing Process Engineers
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• v.13 no.6
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• pp.145-151
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• 2014

The glass used for mobile display windows is required to have high strength. Chemical strengthening by means of ion exchange is widely used glass. The depth of the layer and the compressed stress are affected by tempering temperature and time. The purpose of this study is to investigate the range of DOL and CS, which to less breakage during reliability tests such as the ball drop test, hole drop test, 3-point bending test, drop test, and tumble test with Soda-lime Glass.

• Journal of architectural history
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• v.32 no.3
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• pp.31-38
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• 2023

Most of the changes found on the toi-maru of the Sang-chun-heon Historic House indicate that the upper structure of the toi-maru of the late Joseon Dynasty houses where toi-bo was installed was not completed in an instant. Toi-maru with stud is especially typical in 3-Dori type Structure, and can be found in many historic houses in Yang-dong Village, where the many 3-Dori type Structure is located. This type can be interpreted as the intermediate type that began at the eaves was settled as a toi-maru with a separate toi-bo. It seems that the toi-maru in front of the on-dol room at the time of the construction of the Sang-chun-heon historic house would not have been the same as it is now. The members dividing the on-dol room, the walls, and the various incomplete appearances seen in the window composition can be construed as traces of the change. The fact that all three types of houses that occurred during the spread of toi-maru after the mid-Joseon Dynasty can be examined can be added to the existing evaluation of cultural property houses in Yang-dong Village.

• Journal of architectural history
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• v.24 no.2
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• pp.35-44
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• 2015

The purpose of this study is its residential spaces through the analysis of exterior space and interior space at Wu-lin Village(烏林屯) in Jiao-he, China. The method of this study is to search for documentation, interview, residents, make a survey of these villages about immigration history, surroundings, topographical keynotes, administration system, residential number, residential style, site composition, etc. The residents moved from Yen-bien and Jiao-he in China etc. The ancestor moved from North of Gyeong-Sang Province in South of Korea, North of Ham-Gyeong Province in North of Korea etc. The main road divides the village into two parts: the north quarter, Wu-lin Village, typified by the Chinese house, and the south quarter, You-Yi Village(友誼村), typified by the Korean-Chinese house. The houses is compose of main building and an accessory building. The main building looking south. The vegetable garden is around main buildings. The main building is compose of an On-dol room(a hot-floored room) and a kitchen, a corridor etc.

• Archives of design research
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• v.11
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• pp.72-81
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• 1995

The purpose of this study was investigate the consistency of Korean traditional space in apartment. Fifty-two apartments and its dwellers were selected for field survey research and questionnaire. The major findings were summarized as follows: First, the space layout which has its origin in Korean traditional house was found in contemporary apartment and favored than that of western apartment. Second, among the Korean traditional space characteristics, the openness and closeness were found between the living room and room, living room and dining room, dining room and kitchen. Third, the heating system has been being changed from radiator to on-dol. Also favored finishing materials were revealed on-dol wood flooring and picture window for the living room, jang-pan flooring and Korean lattice window for the master room, wall covering for every wall and ceiling.

• Resources Recycling
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• v.29 no.3
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• pp.11-23
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• 2020

This study aims to investigate breakage and liberation characteristics of iron ore from Shinyemi mine, Jeongseon by ball mill. Parameters of breakage functions for three grade samples of iron ore were obtained using single-sized-feed breakage test and back-calculation based on nonlinear programming. The results showed that with the increase in the grade of iron ore, the breakage rate factor decrease whereas the particle size sensitivity decreases. This results from retardation of microcrack-propagation by magnetite grain in the ore. Breakage distribution analysis showed that the breakage mechanism appear to be impact fracture dominant with the increase of grade owing to the stress distribution effect by magnetite grain. Degree of liberation (DOL) increased with the increase in grade and decrease in particle size, respectively. Using the breakage function and size-DOL relationship, a model that can predict time-dependent-DOL is established. When scale-up factors from operating condition are available, the model is expected to be capable of predicting size and DOL with time in actual mining process.

• Journal of the Korea Concrete Institute
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• v.13 no.4
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• pp.314-320
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• 2001

In this paper, the properties of an expansive agent (CaO-CaS $O_4$) for dry shrinkage compensation were investigated by a series of experimental program, which might be used at On-Dol heating system as mortar type. The expansion principle of the CaO-CaS $O_4$ was mainly verified. As a result of this study, the correlation between the content of the expansive agent and the compressive strength was obtained in the form of exponential function(Y = A $e^{-x}$), showing that as the content of expansive agent increased as the expansion performance with the compressive strength increased by only a certain amount. Also, as a results of the analysis of a correlation between the expansive performance and the chemical properties which generally accompanied a part of quality management in manufacturing the expensive cement, the expansive performance was relative to only the contents of the F-CaO among chemical properties(Blaine, +44$\mu\textrm{m}$R, F-CaO, S $O_3$,L.O.I). And it was clarified that the results were relative to the second order function, showing that if the contents of the F-CaO increased the expansive performance Increased.d.

• Proceedings of the Korea Concrete Institute Conference
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• 2001.05a
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• pp.225-230
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• 2001

Cast-in-place foamed concrete is a high porous material placed as base the layer of mortar screeds in the panel heating system, so the quality of mortar is affected by it. Therefore, this study is aims to investigate how the absorption characteristics of foamed concrete influences on mortar screeds according to the foamed ratio-62%, 67% and 72%- and the surface treatments of foamed concrete-water and acrylic emulsion primer spray, etc. The result of this study shows that water-spray in the surface of foamed concrete has a good effects to reduce mortar cracking.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 1988.10a
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• pp.18-20
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• 1988

The electrical characteristics of LiTCNQ, the most important intermediate in a synthesis of an organic charge transfer complex, was measured. Activation energy of LiTCNQ was estimated from the conductivity variation on the temperature increase.

• Journal of the Korea Concrete Institute
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• v.13 no.1
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• pp.69-76
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• 2001

Foamed concrete for cast-in-site, which shows excellent lightweight, thermal insulation, noise insulation, constructability and cost efficiency, has been applied as thermal insulation or filling material for On-dol. However, the technology is too insufficient to obtain the high level of quality, and serious problems often occur in quality control at sites. It, thus, is necessary to establish the proper and reasonable quality control method for ensuring the required quality, based on the investigation on the physical properties and their reciprocal relation. This study aims to settle the quality control method in case of applying FA foamed concrete replacing 40% by weight with fly-ash as the filling material for On-dol. The results of the study include the correlation among flow, as-placed density and foam ratio of fresh foamed concrete, the correlation between physical properties before hardening and after 28-day, provision of an equation to estimate 28-day compressive strength early with 7-day compressive strength, and suggestion of quality criteria for the revision of KS on foamed concrete for cast-in-site.