• Journal of Environmental Impact Assessment
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• v.11 no.4
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• pp.281-287
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• 2002

자연친화적 하천사업에 있어서 못은 하천환경을 구성하는데 기본단위이나 수환경상의 기능에 대한 평가는 이루어지지 않고 있는 실정이다. 못의 수환경을 평가하기 위하여 측정 자료를 토대로 한 일중 수질모형을 개발하여 적용하였다. 못의 하천환경에 대하여 물리적, 생태학적 관점에서 그 효과를 분석하였다. 못에 있어서 일중 수질은 혼합의 정도에 따라 영향을 크게 받으며 이러한 모의실험 결과는 향후 못의 조성에 따른 자료수집이나 일차 생산력을 이해하는데 유효하게 이용될 수 있을 것이다.

• Journal of the Korean Wood Science and Technology
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• v.45 no.5
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• pp.613-621
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• 2017

This study was performed to determine the withdrawal loads and strengths on the effect of dried wooden dowel. The test block was manufactured from 15 mm thick domestic wood and particleboard. Dowels of 6, 8 and 10 mm in diameter are made of korean castanea, korean pine and tulip wood. Research reported here indicates that withdrawal loads increase, but withdrawal strengths decrease, as the dowel diameter increases. This study also indicates that withdrawal load and strength of dried wooden dowel showed over 10% increase compared to those of normal conditioned dowel. However, there was an exception for the case of korean pine test block with dried tulip wood dowel. Meanwhile, the dried wooden dowel withdrawal loads and strengths for particleboard test blocks show 6~14.4% and 6.2~18.2% increase, compared to those of normal conditioned dowel, respectively.

• Journal of the Korean Wood Science and Technology
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• v.37 no.6
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• pp.524-530
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• 2009

In the post-beam structure, the infilled light-frame construction provides most shear strengths. Shear properties of the light-frame structure can be estimated from the shear properties of nailed connection for the sheathings, and those of nailed connections can be done from nail bending strengths. For the basic study to predict the yield strength and the slip modulus of a nailed sheathing shear wall, those of a nailed joint were examined from nail bending strengths. To estimate shear properties of a nailed connection, referenced bearing strength and bearing constant for the wood members and the experimental nail bending strengths of the helically threaded nail were applied. The yield strength using the diameter at grooves instead of shank diameter was well coincided with the experimental value, but the slip modulus was estimated much smaller. The effective factors, specific gravity for the main member, withdrawal by nail head diameter to the side member, and embedment and moment at the nail head were considered, and further examinations are needed for the precise prediction of the nailed connections.

• Journal of the Korean Wood Science and Technology
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• v.36 no.4
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• pp.66-76
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• 2008

Recently, demands for the structural uses with domestic Japanese larch and SPF(spruce-pine-fir) lumber from North America have been increased. Shear properties of nailed joints that are the most simple and optimum fastening method in wooden constructions, especially in light frame construction. For the nailed joints, in North America and Japan, a number of basic and practical studies have been performed. The shear behaviors for the double nailed joint with variations of member and its direction, were examined. Shear properties of the shear specimens with SPF stud showed more remarkable variation than larch glulam and larch stud. Furthermore, the relationships between slip modulus and strength are not coincided in every case.

• Journal of the Korean Wood Science and Technology
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• v.44 no.5
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• pp.736-742
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• 2016

Wooden dowels are commonly used to join the wooden members together in many types of structures, But little information is available concerning their holding properties in domestic wood. This study was performed to determine the withdrawal loads and strengths on the effect of diameter of dowel and hole clearance. The test block was manufactured from 15 mm thick korean red pine and korean pine. The dowel was manufactured 6, 8 and 10 mm diameters from korean castanea, korean pine and tuliptree. Research reported here indicates that withdrawal loads increase, but withdrawal strengths decrease, in a linear fashion as the dowel diameter increases. This study also indicates that dowel withholding load and strength increase in a linear fashion as a hole clearance decreases.

• Journal of Wetlands Research
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• v.20 no.3
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• pp.281-293
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• 2018

Wetlands of Dongbaekdongsan were classified into two types of pond and vernal pool. 11 plant communities are established there such as Nymphoides indica community, Sparganium stoloniferum Community, Persicaria hastato-auriculata community, Scirpus triangulatus community, Triadenum japonica community, Juncus papillosus community, Deinostema violacea community, Centipeda minima community, Apocynum sibiricum community, Isachne globosa community, and Ulmus parvifolia community. Nymphoides indica community is established in a pond located on the entrance of the Dongbaekdongsan and Persicaria hastatoauriculata community appears on edge of the pond. Sparganium stoloniferum community is formed in nearby pond with relatively shallow water and Persicaria hastatoauriculata community is established on margin of the pond. Vernal pools had been used for drinking water source and for livestock in some cases in the past. Scirpus triangulatus community is established in the most wet site as the center of the pools and Juncus papillosus community - Deinostema violacea community - Triadenum japonica community, and Apocynum sibiricum community appear in a concentric circle pattern as far away there. Ulmus parvifolia community is established in a dry vernal pool. This is the first study on vernal pool carried out in Korea. Therefore, most vegetation types are new ones different from existing studies on wetland.

• The Journal of Engineering Geology
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• v.23 no.4
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• pp.409-425
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• 2013

This study presents a prediction of a time-series of the area inundated by effluent from Heavenly Lake caused by ground behavior prior to a volcanic eruption. A GIS-based hydrological algorithm that considers the multi-flow direction of effluent, the absorption and storage capacity of the ground soil, the storage volume of the basin or the depression terrain, was developed. To analyze the propagation pattern, four hypothetical collapse zones on the cheonji ground were set, considering the topographical characteristics and distributions of volcanic rocks at Mt. Baekdu. The results indicate that at 3 hours after collapse, for both scenarios 1 and 2 (collapses of the entire/southern boundary of cheonji), a flood hazard exists for villages in China, but not for those on the North Korean side of the mountain, due to the topographical characteristics of Mt. Baekdu. It is predicted that villages in both North Korea and China would be significantly damaged by flood inundation at 3 hours elapsed time for both scenarios 3 and 4 (collapses on the southern boundary of cheonji and on the southeastern-peak area).

• The Journal of the Korea Contents Association
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• v.10 no.9
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• pp.220-231
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• 2010

The object of this study is to find ways of the modern succession of folklore by attempting the creation culture contents and looking into the aspects of using 'Jangjamot Legend'. Folk tale which has been handed down among people for many years is that story contents that are enjoyed by anonymous many people. The original narration and the cultural elements of 'Jangjamot Legend' which show the origin of a certain pond and rock can be used for creation of culture contents. The legend has been created the video contents or used the origin of the village ritual and festival in different areas. If the festival and the contest related to the legend is activated, more contents of the original narration will be created by the folklore or tourism. The preservation of the original narration will be easily accessed by the mass about 'Jangjamot Legend'. The cultural elements which are inherent in the legend shall cause the creation of consistent and effective contents. Through these contents creation, folklore will be passed on to the next generation with the obtain of universality in the modern times.

• 정보보호뉴스
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• s.137
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• pp.12-13
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• 2009

대부분의 사람들이 좋은 배우자를 찾는데 투자하는 노력과 정성에 비해 그렇게 찾은 좋은 배우자를 유지, 관리하는 데는 상대적으로 소홀하다고 한다. 조직의 경우도 똑같은 과오를 범하는 경우가 많다. 훌륭한 인재를 구하기 위해 막대한 비용과 시간을 들여 채용절차를 거치지만, 막상 채용을 하고나면 인적자원 개발 및 관리에 무관심해 좋은 인재가 재능을 펼치지 못하고 무기력해지거나, 조직 내에서 비전을 찾지 못하고 이직하게 되는 경우가 많다. 이 같은 문제를 예방하기 위해 조직은 무엇을 해야 할까?

• 프린팅코리아
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• s.4
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• pp.126-129
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• 2002

UNIX 기반의 안정성과 웹과의 호환성이 대폭 향상된 애플코리아의 OS-X버전이 서체공급사와의 원만한 협의가 이루어지지 않아 활로를 찾지 못하고 있다. 더욱이 OS-X 버전이 CID폰트를 기본으로 하고 있어 CTP장비는 물론 국내 출력시장에 엄청난 파급효과를 가져올 수 있음에도 불구하고 제대로 시장 진입을 못하고 있어서 그 안타까움이 더 크다.