• 한국작물학회지
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• 제34권1호
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• pp.74-80
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• 1989

우리나라에 재배되고 있는 주요 수도품종들의 생육형질들의 차이점을 양적으로 나타내고 또한 이들 품종들의 위치를 도면상에 나타내어 실용적인 면에서 품종을 쉽게 선정 또는 분류할 수 있게 하기 위해 Two-dimensional ordination 분석법을 도입하여 검토 분석하였던 결과를 요약하면 다음과 같다. 1. 공시된 27개 품종중에서 장성벼가 다른 품종들과의 종합적인 생육형질의 유사성계수가 가장 적었으며, 다음으로는 칠성벼, 가야벼, 기호벼, 한강찰벼, 상풍벼 순이었고, 반대로 종합성육형질의 유사성계수가 가장 높은 품종은 대청벼와 영산벼였고 다음은 낙동벼, 신선찰벼, 광명벼, 영덕벼, 팔공벼, 동진벼의 순이었다. 2. 품종집단별로 유사성계수가 가장 적은 품종집단은 가야벼와 상풍벼, 기호벼 또는 서남벼집단, 삼강벼, 기호벼집단, 칠성벼와 장성벼, 상풍벼, 추정벼, 기호벼 또는 서남벼집단, 장성벼와 광명벼, 상풍벼, 기호벼, 대창벼 또는 화성벼집단으로 45∼50％ 범위의 유사성계수를 보였다. 한편 유사성계수가 가장 큰 품종집단은 동진벼와 신선찰벼, 대청벼, 섬진벼 또는 영산벼집단, 상풍벼와 기호변집단, 영덕벼와 영산벼 또는 팔공벼집단, 광명벼와 영덕벼집단, 락동벼와 광명벼, 영덕벼, 대청벼, 화성벼 또는 영산벼집단, 신선찰벼와 대청벼 또는 영산벼집단, 섬진벼와 대청벼 또는 영산벼집단. 대청벼와 영산벼집단으로서 유사성계수가 85％ 이상을 나타내었다. 3. Two-dimensional ordination 분석법에 의한 품종분포는 대부분의 품종이 현행 분류방법인 통일형과 자포니카형으로 구분되었으나, 통일형품질인 중원벼는 오히려 자포니카형 품종군에, 그리고 자포니카형 품종인 섬진벼는 오히려 통일형 품종군에 위치하였고, 신선찰벼와 대청벼는 통일형과 자포니카형 품종군의 중앙부에 위치하였다. 4. Two-dimensional ordination 분석법에 의한 품종분류는 품종배치다양화를 위한 실용적인 선정방법이 될 뿐만 아니라 목적하는 바, 형질을 갖는 품종선정에도 좋은 정보를 제공하여 주었다.

• 건축사
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• 제3권8호통권8호
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• pp.49-52
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• 1968

• 한국조경학회지
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• 제19권2호
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• pp.52-64
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• 1991

The actual vegetation and environmental impact grade of Daekwanrim in Hamyang were investigated and the structure of the plant community was analyzed by the classification of TWINSPAN and three kinds of multivariate ordination (PCA, RA, DCA) techniques.Twenty-eight plots were set up by the clumped sampling method in June of 1990. Carpinus laxiflora and C. tschonoskii communities covered 38% and Quercus species communities covered 39% of the total rea. Environmental impact class 3 and 4 area. Twenty-eight plots were divided into three groups according to the degree of damage by TWINSPAN and ordination techniques. The dominant species in the shrub layer of the heavily damaged site and the light damaged site were Styrax japonica and Sasamorpha purporanscens, so the sucessional trends should be disturbed. As a result of the analysis for the relationship between the stand scores of DCA and the environmental impact class, they had a tendancy to increase from the light damaged to heavily damaged site.

• 기술사
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• 제19권2호
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• pp.34-42
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• 1986

These brief studies and reports of the use of exposed aggrigate precast concrete in practice are combined with a description of some notable co-ordination such as shop drawing, manufacturing and erection in the field construction. Above mentioned exposed aggrigate P. C. means architectural P. C. which was used to the VOTRAKON site in Riyadh, Saudi Arabia. Fabricated P. C. on the site without autoclaving and steam curing plant had been successfully carried out on this project-core building, conference room and others. The project designed by HOPE/VTN international INC. which is located in San Diego, California U.S.A. stands for vocational training and related support facilities contract. We had to submit shop drawings showing complete information for fabrication and installation of P. C. unit reinforcement. Also we should be indicated member dimension and cross section, location size and type of necessary for erection. We can delineate the following characteristic results. One of the most important things how to handle exposed aggrigate P.C. unit as specified was quality assurance and co-ordination for shop drawing, manufacturing and erection.

• The Korean Journal of Ecology
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• 제8권3호
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• pp.147-152
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• 1985

The forest vegetation of natural reserve area (175ha) at north-eastern slope of Solibong (537m), Gwangneung, was studied by plant sociological method and two dimensional ordination technique. In the area dominated by Carpinus laxiflora, from the lower site to peak of Solibong, a zonal distribution of C. laxiflora-Quercus mongolic forest, C. laxiflora-C. cordata forest, C. laxiflora-Q. serrata forest, C. laxiflora forest and C. laxiflora-Rhododendron schlippenbachii forest were recognized by the plant sociological survey. It is seem that the optimal range of Carpinus laxiflora forest occur in mesic-warm site by two dimensiional ordination with thermal condition and soil moisture condition. The optimal range (over 100 in importance value) was the range of 76~89。C.month in warmth index and 18~45% in soil water content.

• The Korean Journal of Ecology
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• 제14권2호
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• pp.181-194
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• 1991

Vascular plants, the structure and interrelationship of the forst vegetation in pyonsan peninsula national park were inverstigated by phytosociological, continuum analysis and ordination methods. The flora was composed of 119 families,411 genera, 609 species, 79 varieties, 10 forma or 698 taxa. Some characteristics of the plants have been represented such as ch-$D_1$-$R_5$ type in biological one, erect form in growth on. It is noticeable that lycoris aurea, carpinus tschonoskii var. eximia, corylus hallaisanensis and abeliophyllum distichun among the investigated plants delong to endemic and/or rare species. The forest vegetation was classified into seven communities: quercus variabilis, pinus densiflora, quercus serrat, platycarya, carpinus tschonoskii, quercus dentata, zelkova serrata community. and quercus variabilis, pinus densiflora and pinus rigida, were the commonest species among distributed species. In addition interrelationship between diversity and dominant indrx of quercus variabilis community was little different each other and that of accordance altitude also was not much distinguishable. Platycarya strobilacea, pinus densiflora and quercus variabilas community were distinguished different groups by polar ordination.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 A
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• pp.159-162
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• 2002

A software, called touch-one, is developed about the determination of short-circuit values and protective co-ordination in power system. The used solution algorithm reviewed intensively, and the protective co-ordination determination technique presented by using the circuit-breaker's current-limitation characteristic. The protective coordination concerns the behaviour of two devices placed in series in an electrical network, with a short-circuit downstream circuit-breaker. It has two basic principles: First, discrimination which is an increasing requirement of low voltage electrical distribution systems. Second, which is less well known: cascading, which consists of installing a device, whose breaking capacity is less than the three-phase short-circuit current at its terminals and helped by main circuit-breaker. With this software, we can construct a electric-power system which is reliable and economic according to user's purpose.

• 한국환경복원기술학회지
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• 제10권5호
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• pp.51-57
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• 2007

In order to study the characteristics of vegetation structure in Gundal mountain, we investigated forest community using belt transect method at 30 sites in Gundal mountain. As the result of important value' calculation on over DBH 2cm, Pinus densiflora (56.8), Quercus mongolica (48.5), Pinus rigida(41.4), Castanea crenata (22.3), Quercus variabilis (22.3), Carpinus laxiflora (16.9), Quercus aliena (11.3), Sorbus alnifolia (8.6), and Quercus acutissima (8.5) were in the order of important value. According to the ordination analysis of Gundal mountain forest, Quercus mongolica was found in north face and high of mountain. Carpinus laxiflora was found in north face steep slope and middle of mountain. As DBH analysis, the study community will be dominated by Quercus species. The correlation between the forest community and environment factor could be thought as distinction by soil nutrition etc., but we need more study about environment factors.

• Journal of Plant Biology
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• 제16권3_4호
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• pp.1-6
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• 1973

The distribution of plant communities along the Bukhan Riverside in Chun-seong was studied by means of the methods fo Curtis and Pattern. The communities were arranged in a single-dimensioned ordination on the basis of the importance values of the persistent species. Leading dominant species, form the 'low' level to the 'high' levels of the ordination gradient, were Phalaris arundinacea, Salix gilgiana, Artemisia feddei, Zoysia japonica, Pennisetum japonicum, and Arundinella hirta. These species from a continuum from the river to the dry grassland depending upon available soil-moisture. Standing crops in terms of dry weight and the nitrogen content of the above-ground parts of these species showed a good relationship with gradients of available soil-moisture.

• The Korean Journal of Ecology
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• 제11권3호
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• pp.131-136
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• 1988

The continuum analyses and polar ordinations were applied for the ordination of forest vegetation in Mt. Naejang, national park in Korea. In the continuum analyses the sequence of Pinus densiflora, Quercus mongolica, Quercus variabilis, Carpinus laxiflora, Carpinus tschonoskii, Lindera erythrocapa and Zelkova serrata community was arranged along the continuum gradient as in moisture gradient analyses. The positive correlation of r=0.83 between continuum index and soil moisture content was observed. In the polar ordinations ten communities of Pinus densiflora, Quercus monogolica, Quercus variabilis, Carpinus laxiflora, Daphniphyllum macropodum, carpinus tschonoskii, Quercus aliena-Carpinus tschonoskii, Torreya nucifera, Cornus controversa-Lindera erythrocarpa and Zelkova serrata were identified. However, continuous distribution pattern of ten communities mentioned above could be regarded as a vegetational continuum. The results of these ordinations also were corresponded to those of phytosociological classification.