• Journal of Advanced Marine Engineering and Technology
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• v.40 no.4
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• pp.307-313
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• 2016

When liquefied natural gas (LNG) is stored in a tank, it is necessary to maintain low temperature. It is very important that insulation techniques are applied to the LNG cargo because of this extreme environment. Hence, laminated wood, especially plywood, is widely used as the structural member and insulation material in LNG cargo containment systems (CCS). However, fracture of plywood has been reported recently, owing to sloshing effect. Therefore, it is necessary to increase the strength of the structural member for solving the problem. In this study, compressed wood, which is used as a support in LNG independent type B tanks, was considered as a substitute for plywood. Compression and bending tests were performed on compressed wood under ambient and cryogenic temperatures to estimate the mechanical behaviors and fracture characteristics. In addition, the direction normal to the laminates surface was considered as an experimental variable. Finally, the feasibility of using compressed wood for an LNG CCS was evaluated from the test results.

• Journal of the Korean Solar Energy Society
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• v.30 no.6
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• pp.81-88
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• 2010

This study compared the feasibility of utilizing a wood bioenergy system over a conventional central heating and cooling system and a cogeneration system in an apartment complex. The performance of the three systems were compared in the following areas: energy consumption, environmental impact(output of CO2, CH4, and N2O), and life cycle cost. The results showed that energy performance of the wood bioenergy system was similar to the conventional central system (just a 1% improvement) but the cogeneration system showed a 12% reduction in energy consumption compared to the conventional system. In terms of environmental impact, the bioenergy system reduced pollutants by 50% while the cogeneration system reduced pollutants by 30% compared to the conventional system. Life cycle cost analysis indicated bioenergy and cogeneration to have an 8% and 19% improvement over the conventional system. The findings of the study suggest that it is both economically and environmentally beneficial to use a wood bioenergy system in place of a conventional central heating and cooling system in apartment complexes.

• Proceedings of the Korean Institute of Interior Design Conference
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• 2004.11a
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• pp.140-143
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• 2004

The move from steel tubes to bent wood and the 'laboratory experiments' with wood which Aalto carried out in order to create furniture gave him vital impulses as he sought and found his own architecture style in the 1930s. Like his architecture Aalto's chair designs represent a 'humanized' interpretation of the severe aesthetic and radical technological experimentation of the Modern Movement. The purpose of this study is to find what is the result of the form of his works on the basis of main idea and tend of his works, to search the element and principle of formal composition, to establish the relation-ship between the architect's philosophy and the form of his works. Aalto's furniture, constructed of laminate bent wood or moulded plywood, is not only functionalistic, but also ideal for the psychological need of the people, which is the special quality that complements the Factionalism that features mostly on the metal tube furniture. It shows that Aalto is a humanist dealing with mechanized age.

• Journal of the Korea Furniture Society
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• v.22 no.4
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• pp.299-307
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• 2011

This article aimed to provide objective and practical information on wood terms of making furniture focusing on the wood species that furniture designers and firms in Korea have used to create furniture from the traditional up to the modern times. Through the content analysis method with wood information from literature related to furniture at home and abroad, studios of making the traditional Korean furniture, domestic furniture firms, and the catalogues of Korean crafts council and Korea furniture society, the wood species of making furniture was studied in the terms showing the number of the species classified in needle leaf tree and broad leaf tree. As a result, the furniture wood terms were analyzed about 230 species including 200 broad leaf tree and 30 needle leaf tree. 74 out of 100 domestic species studied have been used from the traditional up to the modern time for creating the traditional Korean wood furniture. The 230 species were classified by such detailed uses as furniture mainly and the related small objects, interiors, architecture, exteriors, materials like plywood, toys, musical instrument, exercise equipment, household items, and so on. In addition, some of the terms were clarified such as Madika to Jelutong, Karin to Paudauk and Narra, Red sandalwood to Indian rose wood, and Cherry blossoms from home, the same family as Cherry from abroad but the different species, and so on.

• Journal of the Korean Wood Science and Technology
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• v.30 no.3
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• pp.85-90
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• 2002

This study was carried out to investigate the dimensional stability of bentwoods by three treatments: steaming, urethane varnish coating, and polyethylene glycol (PEG) treatment. Bentwood processing employed a bending-jig with only 4 cm radius of curvature (ROC). The used species were bitter wood (Picrasma quassioides), painted maple (Acer mono), and birch (Betula schmidtiii). The bending properties of these are well-known in bentwood production (Jung et al., 2002). The bentwoods were treated repeated at room temperature [20℃, RH 80% (12 hours) and 40℃ under RH 10% (12 hours)]. To estimate the dimensional stability of bentwoods, we measured the radius of curvature and end-distance. The best results could be attained with PEG treatment. Steaming was the worst treatment. Comparing the properties of the different species, the dimensional stability of bitter wood was excellent. It was concluded that the steaming treatment was unsuitable for dimensional stability of bentwoods.

• Journal of the Korean Institute of Rural Architecture
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• v.22 no.3
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• pp.33-40
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• 2020

Wood is one of the main materials of wooden building. Hanok also uses wood as its main component. Recently, Hanok continues to be built. Wood is affected by the climatic environment. The growth of decay bacteria is activated at more than 80% relative humidity. The microclimate environment and moisture content were measured for architectural cultural properties that have been maintained for a long time as a wooden building. The method analyzed the measured data by distinguishing between cloudy and sunny days. In the case of the old house, Anchae moisture content was higher than that of Sarangchae. This seems to be due to the narrow front yard or the planting of trees. The microclimate environment inside the house began to decrease in humidity from 8 am. According to the survey data, the relative humidity was less than 80% from 9 am when there was wind around 4-6 am. It appeared an hour earlier than in the absence of wind. As a result, the time interval for dehumidifying of wood was widened. Therefore, the wooden building is open to the front so there is airflow under the eaves during the daytime and wind in the morning appear to be alternatives in order to lower the moisture content.

• Journal of the Korean Wood Science and Technology
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• v.46 no.3
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• pp.285-296
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• 2018

As a study for the verification of heat treated wood according to ISPM No. 15, the spectroscopic characteristics of the heat treated wood surface were analyzed. Various functional groups were observed on the IR spectrum, but it was difficult to find any particular difference between wood species, heat treatment time and storage period. HBI (hydrogen-bonding intensity) shows the change of the heat treated wood according to the storage time, but the change of wood with the heat treatment time was hard to be observed. On the PCA score plot, however, it was possible to sort the wood according to the heat treatment time of 60 minutes or 90 minutes in the species. The standards for classification of heat-treated wood in PCA were aromatic rings in lignin and C-H bending in cellulose, and these components were able to classify heat-treated wood by ISPM No. 15.

• Journal of the Korean Institute of Rural Architecture
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• v.9 no.1
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• pp.43-50
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• 2007

The Guebangjip(꿰방집) house in Gocheonri(고천리) is built of architectural materials which are not by composition but by penetrating the drilled materials as the meaning of its character. Comparing with other cases such as Japan and China which this kind of structure method is still generally used, it is hardly found any cases in Korea. However it could have been used in Korea because of the vestiges of Sogeo(巢居) and Gannan(干欄) style architecture. Apparently it is considered as the traditional building technology which is existed by succession in the certain range of time and space.

• Journal of architectural history
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• v.18 no.1
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• pp.67-89
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• 2009

This study examines the examples of wooden member terms of architecture terminology used in Yeonggeon-euigwe(營建儀軌) in the era of Joseon Dynasty. It is to trace the period of their appearances and changes and also to illuminate coinage characteristics and method of architectural terminology used in Yeonggeon-euigwe through graphonomy research and system and structure of wood member terms. By analyzing the meaning of a word, it was found that there was much Insineui, difference of word meaning by country was shown although it was the same shape of character. In particular, the specialty of double language system of Korean language is combined with that of wood terms. Operation of type unrelated to word meaning was found and Korean unique Gachaeui(假借義) like Bo(褓) was generated. This study draws separate systems: one is that can indicate coinage characters of architectural terminology in Yeonggeon-euigwe. The other is to obtain coinage method as a result of reclassifying terminology based on it.

• Journal of the Korean Wood Science and Technology
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• v.48 no.3
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• pp.283-290
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• 2020

For visual inspection-based wood identification, optical microscopy techniques typically require a relatively large sample size, and a scanning electron microscope requires a clean surface. These novel techniques experience limitations for objects with highly limited sampling capabilities such as important and registered wooden cultural properties. Synchrotron X-ray microtomography (SR-µCT) has been suggested as an effective alternative to avoid such limitations and various other imaging issues. In this study, four pieces of wood fragments from wooden members used in the Manseru pavilion of Bongjeongsa temple in Andong, Korea, wereused for identification. Three-dimensional microstructural images were reconstructed from these small wood samples using SR-µCT at SPring-8. From the analysis of the reconstructed images, the samples were identified as Zelkova serrata, Quercus sect. Cerris, and Pinus koraiensis. The images displayed sufficient spatial resolution to clearly observe the anatomical features of each species. In addition, the three-dimensional imaging allowed unlimited image processing.