• 한국수자원학회논문집
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• 제51권8호
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• pp.729-737
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• 2018

본 연구에서는 실내실험을 통하여 개량형 공압식 가동보를 대상으로 수로경사 변화를 고려한 유사의 수리학적 발달 과정을 분석하였다. 분석결과 보에 의하여 형성된 델타는 시간이 증가함에 따라 하류로 이동하며, 델타높이($h_d$)는 증가하였다. 또한 보에 도달 할수록 흐름이 약해지면서 델타의 이동속도($S_D$)는 감소하였다. 무차원 델타 위치($x_D/x$)가 증가할수록 무차원 델타의 유효높이($h_d/h_w$)와 무차원 저수지 용량($V_{xD}/V_x$)이 증가였다. 따라서 동일한 조건에서 수로경사(i)가 완만할수록 델타의 퇴적량($Q_s$)이 감소하게 되며, 델타의 체적($V_{xD}$) 발달에 큰 영향을 미치는 것으로 나타났다. 통수 초기 델타의 전면경사가 완만하며, 델타가 하류로 이동할수록 델타의 전면경사는 증가하였다. 또한 수로경사(i)가 완만할수록 델타의 전면부 길이 비($h_d/{\Delta}S$)는 1에 가까워지고, 무차원 델타의 높이($h_d/h$)와 무차원 델타의 이동속도($S_D/V_0$)가 감소하였다. 델타의 높이($h_d$)가 증가할수록 수심(h)은 감소하였으며, 보에 접근하는 유속($V_0$)과 델타의 이동속도($S_D$)도 감소하였다.

• 한국연안방재학회지
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• 제1권1호
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• pp.1-9
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• 2014

In order to examine the characteristics of tsunami run-up heights on impermeable/permeable slope, a numerical wave tank by upgrading LES-WASS-3D was used in this study. Then, the model were compared with existing hydraulic model test for its verification. The numerical results well reproduced experimental results of solitary wave deformation, propagation and run-up height under various conditions. Also, the numerical simulation with a slope boundary condition has been carried out to understand solitary wave run-up on impermeable/permeable slope. It is shown that the run-up heights on permeable slope is 52.64-63.2% smaller than those on the impermeable slope because of wave energy dissipation inside the porous media. In addition, it is revealed that the numerical results with slope boundary condition agreed well with experimental results in comparison with the results by using stair type boundary condition.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2000년도 제7차 국제 심포지움(생약자원개발에 관한연구) 및 추계정기 학술발표회 초록집
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• pp.60-64
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• 2000

This examination of vegetation is conducted from lune to Oct. 1999 through on the spot survey, centering on the habitat of Abies koreana around Imgeolryeong, langteomok, and Jeseokbong in Mt Jiri and Yeongsil path and Seongpanak path in Mt. Halla. Species composition tables of the Abies koreana community by altitude and slope in Mt. Jiri and Mt. Halla are made based on the community composition tables examined in quadrat. The Abies koreana-Saso quelpaertensis community in a west slope of Mt. Halla is found that Abies koreana of 4-6m in height forms subtree layer and that of 8-9m in height the tree layer and it reflects a difference between community structure by slope and main composition species. While the tree layer of Abies koreana community is 12-14 in height around the area of 1, 290-1, 560m above the sea of Imgeolryong and path from Baekmudong to Jangteomok, it is 8-12m in height in the area of 1, 680-1, 780m above the sea of path from Jangteomok to Jeseokbong. It means that community structure depends on area and attitude. This study finds out that commonly appearing composition species similar to coverage and presence are Lepisorus thunberianus, Quercus mongolica, Soidago virga-aurea var. asiatica, Ligularia fischeri, Carex lanceolata, Clintonia udensis, Magnolia sieboldii, Betula ermani, Acer Pseudo-sieboldianum, As soil environment of surveyed area, pH of surveyed spots is similar in Mt. Jiri and Mt. Halla, electrical conductvity is higher in Mt Jiri, and contents of organic matter is relatively higher in a west slope of Mt. Jiri and Mt. Halla and lower in their south and west slopes. Contents of organic matter and total nitrogen show that the area of 1, 550m above the sea in a west slope of Mt. Halla is some higher. For pH and contents of total nitrogen and organic matter, Mt. Halla is higher than Mt. Jiri but for electrical conductivity , Mt. Jiri is relatively higher than Mt. Halla.

• Plant Resources
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• 제3권2호
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• pp.138-147
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• 2000

This examination of vegetation is conducted from June to Oct. 1999 through on the spot survey, centering on the habitat of Abies koreana around Imgeolryeong, Jangteomok, and Jeseokbong in Mt Jiri and Yeongsil path and Seongpanak path in Mt. Halla. Species composition tables of the Abies koreana community by altitude and slope in Mt. Jiri and Mt. Halla are made based on the community composition tables examined in quadrat. The Abies koreana-Saso quelpaertensis community in a west slope of Mt. Halla is found that Abies koreana of 4-6m in height forms subtree layer and that of 8-9m in height the tree layer and it reflects a difference between community structure by slope and main composition species. While the tree layer of Abies koreana community is 12-14 in height around the area of 1,290-1,560m above the sea of Imgeolryong and path from Baekmudong to Jangteomok, it is 8-12m in height in the area of 1,680-1,780m above the sea of path from Jangteomok to Jeseokbong. It means that community structure depends on area and attitude. This study finds out that commonly appearing composition species similar to coverage and presence are Lepisorus thunberianus, Quercus mongolica, Solidago virga-aurea var. asiatica, Ligularia fischeri, Carex lanceolata, Clintonia udensis, Magnolia sieboldii, Betula ermani, Acer pseudo-sieboldianum. As soil environment of surveyed area, pH of surveyed spots is similar in Mt. Jiri and Mt. Halla, electrical conductivity is higher in Mt Jiri, and contents of organic matter is relatively higher in a west slope of Mt. Jiri and Mt. Halla and lower in their south and west slopes. Contents of organic matter and total nitrogen show that the area of 1,550m above the sea in a west slope of Mt. Halla is some higher. For pH and contents of total nitrogen and organic matter, Mt. Halla is higher than Mt. Jiri but for electrical conductivity, Mt. Jiri is relatively higher than Mt. Halla.

• 한국작물학회지
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• 제29권2호
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• pp.114-117
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• 1984

경사휴에 의한 벼 품종간 내한발 포장검정방법의 가능성을 검토한 결과, 1. 경사휴 높이와 토양의 pf 치와는 Y=2.25+0.007 X(r=0.990${\ast}\;{\ast}$)의 관계였다. 2. 경사휴가 높아질수록 출수기는 지연되었고, 간장은 단축되었으며, 수량은 감소되었다. 그러한 정도는 품종간에 차이가 뚜렷하였다. 3. 출수 지연일수, 간장 단축률 및 수량 감소률에 의거 판정된 내한발성은 삼 남벼, 밀양26호, 진주벼, 농림나 1호는 강하였고, Knlb361-1-8-6-149는 약하였다.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2010년도 춘계 학술발표회
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• pp.1264-1270
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• 2010

In this study, the effects of slope inclination and rainfall on weathered soil slope stability were investigated for current cut soil slope design criteria. A series of slope stability analysis was performed on the slopes with the same height (5m), but different inclinations (1:0.8, 1:1, 1:1.2, 1:1.5, 1:2). Seepage analysis was also conducted to examine the rainfall effects directly and compare the combined seepage and slope stability analysis results with the slope stability analysis results for rainy season from the current cut soil slope design criteria. Typical properties for weathered soils were used in both the slope and seepage analysis. The analysis results showed that, for the slopes much steeper than the standard slopes, the factor of safety criteria were satisfied. Therefore, it appears that the slope designs by current cut soil slope design criteria lead to conservative results.

• 환경영향평가
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• 제19권6호
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• pp.527-537
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• 2010

This study are Geumjung mountain fortress of the Busan Metropolitan City in the north gate of the East gate around the trail to identify the vegetation structure importance value, dominance, species diversity, similarity index analysis. Results of the study, plot on the western slopes elevation 423-636m, slopes of $15{\sim}20^{\circ}$ slope areas, Pinus densiflora, Pinus thunbergii, Quercus acutissima, Pinus thunbergii, Pinus rigida, Carpinus coreana, Quercus mongolica are fulfilling a community. Trees layer a height 8~12m, coverage 40~70%, sub-trees layer the height 3~7m, coverage 10~80%, shrubs layer the height 0.8~1.5m, coverage 20-30%, herb layer the height 0.1~0.5m, coverage 5-10% were in the range of plot in the east slope elevation 452-647m, slopes in the slope of $5-30^{\circ}$ and Pinus rigida, Pinus thunbergii, Pinus densiflora, Quercus mongolica, Quercus dentata, Carpinus coreana is fulfilling a community. The trees layer height 8~13m, coverage 0~70%, sub-trees layer the height 2~6m, coverage 0~80%, shrubs layer the height 0.8~1.5m, coverage 20-40%, herb layer the height 0.1-0.5m, coverage 5-40% were in the range. The survey showed to be in relatively good vegetation, but in some areas of Pinus rigida, Quercus acutissima, as was predicted in succession, the shrub layer in the plot of some dominated vine plants and vegetation management will be needed for this purpose respectively.

• 한국지반환경공학회 논문집
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• 제15권12호
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• pp.53-59
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• 2014

본 논문에서는 경험에 따라 비합리적으로 설계되고 있는 낙석방지망의 합리적인 설계를 위한 기초자료를 획득하기 위해 표준 단면을 결정하고 비탈면의 경사, 높이, 낙석의 무게, 이격거리 등의 매개변수가 도약높이나 운동에너지, 통과속도 등 낙석의 거동에 미치는 영향을 분석하였다. 낙석의 무게는 400, 700, 1,000 kg으로 변화하고 20 m 높이를 기준으로 낙석방호시설이 낙석의 거동에 영향을 미칠 수 있는 1:0.5($63^{\circ}$), 1:0.7($55^{\circ}$)의 경사에 대해 수행하였으며, 낙석의 낙하높이를 3, 15, 20 m를 변경시켜가면서 해석을 실시하여 사면 하부에 발생하는 최대운동에너지의 변화를 분석 평가하였다. 해석결과, 낙석방지망의 설계 시 현행과 같이 일률적인 적용에서 벗어나 사면의 경사와 예상되는 낙석의 규모나 무게, 법면의 상황 및 낙석의 모양, 낙석 운동형태 등 다양한 조건을 고려한 설계가 필요할 것으로 판단된다.

• Imaging Science in Dentistry
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• 제37권1호
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• pp.19-26
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• 2007

Purpose : To examine whether the maxillofacial skeletal morphology correlates with the condylar position and the anatomic characteristics of articular eminence using measurements of lateral cephalometric radiographs and individualized sagittal temporomandibular joint (TMJ) tomographs. Materials and Methods : I compared measurements of 202 TMJs of 101 orthodontic patients of Kangnung National University Dental Hospital. 1 used Pearson's correlation for comparison of the measuring values in lateral cephalometric radiographs and individualized sagittal TMJ tomographs. Results : Large occlusal plane angle tendency showed decreased width of posterior eminence slope, decreased depth of articular fossa and decreased posterior slope angle of eminence. Large mandibular plane angle tendency showed decreased superior joint space, decreased depth of articular fossa and decreased posterior slope angle of eminence. Large genial angle tendency showed decreased depth of articular fossa, decreased posterior slope angle of eminence and anterior position of condylar head. Large anterior facial height and large posterior facial height tendency showed increased width of posterior slope of eminence, increased depth of articular fossa, increased posterior slope angle of eminence and posterior position of condylar head. Conclusion : Maxillofacial skeletal morphology has correlation with the anatomic characteristics of TMJ. Individualized sagittal TMJ tomographs can provide useful information for anatomical analysis of TMJ.

• Journal of the Korean Wood Science and Technology
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• 제21권3호
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• pp.45-52
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• 1993

Surveyed results on the slope of grain and the twist of sawn lumber of Pinus koraiensis, Larix leptolepis, and Pinus densiflora were summarized as follows: 1. The slope of grain of Pinus koraiensis has a Z-grain in the stem axis. The slope of grain was found to be the lowest at near to the pith and then constantly increased. At the height of 0.2m from the base of stem. a cross section of 35 annual rings was found to have a repeatedly increasing and decreasing slope of grain and then constantly decreased. At the height of 1.2m to 7.2m from the base of stem, the slope of grain increased conspicuously until the 10th annual ring, after which it increased near to the bark with repeatedly increasing and decreasing trends. 2. Pinus densiflora has a S-grain in the stem axis. The lowest slope of grain was found at near to the pith, and the highest in the 10 to 35 annual rings from the pith. 3. Larix leptolepis has a S-grain. At the height of 3.2m from the base of stem, the big fluctuation of the slope of grain was found without any particular trend. 4. The slope of grain and the twist between natural and reforested timber of Pinus koraiensis were found to be almost the same trend in viewpoint of the annual ring. The maximum slope of grain of imported Siberian timber of Pinus koraiensis was found at the 10 annual rings, which was quite similar to that of native species in Korea, but the big difference of the twist was found at 140 annual rings. 5. The twist was little at the mature wood of reforested Pinus koraiensis and Siberians and the duplicated part of mature and juvenile woods of those. On the contrary, the twist was great at the duplicated part of mature and juvenile woods of Pinus koraiensis. 6. The twist of Larix leptolepis showed the S-direction which coincided with that of slope of grain. The twist was greatest at the part of juvenile wood and little at the duplicated part of mature and juvenile woods, and little difference of twist was found between mature and juvenile woods. 7. Siberian larix having a minimum slope of grain showed the lowest twist, and the twist at the duplicated part of mature and juvenile woods showed a middle level of both mature and juvenile woods' portions.