• 한국지형학회지
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• 제25권3호
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• pp.57-70
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• 2018

This study restores onshore paleo-shoreline records and establishes the nature and strain rate of neotectonism by investigating the existence and formative age of paleo-coastal sediments emerged around Sacheon-si in the Southern part of the Korean peninsula. As a result, paleo-sand bars representing 5m of the paleo-shoreline from high tide level are formed in Sacheon-si, and the formation age of these is confirmed as MIS 5c at approximately 100,000 year BP through rock surface luminescence dating to rounded gravels in paleo-sand bars. Although it is difficult to establish the uplift rate of crust precisely due to incomplete restoration of sea level records during the last interglacial stage, the uplift rate along the Southern coast of the peninsula was assumed approximately 0.72 lower than the Eastern coast during the late Quaternary in comparison to the 1st marine terrace along the Eastern coast.

• 한국지형학회지
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• 제27권4호
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• pp.13-28
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• 2020

In this study, the distribution and topographic development of marine terraces, UHS (Upper Higher Surface) and HHS (High Higher Surface) at Yeondae-san area, Gampo-eup were discussed. We critically examined on the substance of the Yeongdong-myeon (a low-lying erosion surface) in the east coast of Korea. In study area, UHS including UHS-246m, UHS-241m, UHS-235m, UHS-220m, UHS-210m and UHS-220 is found on the highest altitude among the marine terraces in Korea. The existence of UHS requires new interpretation on topographical surface like Yeongdong-myeon, which has been commonly accepted as a theory in the society of Korean Geography. Since UHS is distributed continuously ascending on the altitude of HHS, the period of formation should be understood in the same context. And UHS of paleo-shoreline 246m has been estimated to be formed about 1.5 million years ago.

• 한국지형학회지
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• 제28권3호
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• pp.27-35
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• 2021

This study tried to reveal incision rate and its change by formation of lava plateau in the Cheorwon-Jeongok area. Incision rates of 0.421 m/ka and 0.101 m/ka in the upper and lower reaches of Hantan-gang, respectively, were calculated from sites before formation of lava plateau. These incision rates indicate that the upper and lower reaches of Hantan-gang have much higher and slightly lower incision rates than streams with similar distances from the Taebaek Mountains. However, sites after formation of lava plateau mostly showed incision rates ranging from 0.5 m/ka to 0.9 m/ka. Streams flowed on the lava plateau revealed 2-3 times higher incision rates than unrelated-streams or paleo-streams to formation of lava plateau did. These results suggest that incision rate in the study area was greatly influenced by formation of lava plateau and resultant geomorphic avulsion with rearrangements of stream.

• 대한지리학회지
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• 제51권4호
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• pp.473-490
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• 2016

본 연구는 한반도 지형 연구에서 가장 중요한 지역의 하나인 추가령 구조곡에 대한 지역지형학적 분석을 목적으로 한다. 추가령 구조곡은 열곡에 의한 단층선대로서 한반도의 지체 구조와 산맥론에서 중요한 역할을 하는 것으로 언급되나 이를 뒷받침하는 지형학 및 지질학적 논의는 계속되고 있다. 본 연구에서는 추가령 구조곡 전체를 하나의 지역으로 보면서, 구조 지형, 화산 지형, 하천 지형, 산지 지형, 단구 지형, 호소 지형, 퇴적물과 층서 등 다양한 지형 주제들을 통합하여 추가령 구조곡 지역의 지형을 파악한다. 이를 위해 그 동안의 연구결과들을 종합하여, 추가령 구조곡의 명칭과 지형 및 지질 개관, 지형 연구사 등을 제시하고, 구조곡의 기원, 용암대지의 형성과정, 개석에 의한 하천의 구조, 용암대지 이전의 지형 복원, 지형 형성과정과 연대 등을 분석한다. 추가령 구조곡은 구조선을 바탕으로 구조 지형과 화산 지형을 중심으로 한 다양한 지형과 지형 형성과정을 보여주는 선형의 지역으로 파악된다.

• 한국환경복원기술학회지
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• 제19권4호
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• pp.19-28
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• 2016

The objectives of this study were to establish the slope criteria and analyze the forest land restoration plan in North Korea. Reviewing the literature of the countries, the relationships among the climate, erosion controls, and slope criteria with forest restoration programmes, implemented were analyzed. Comparison of forest land management policies was conducted between South and North Korea. The soil erosion controls using biological barriers were at $15{\sim}20^{\circ}$slopes in arid climate regions and $25{\sim}30^{\circ}$ in humid climate regions. In the case of South Korea, an afforestation policy from the "Act on Clearance Project of Slash-and Burn Agriculture" of 1966 was enforced on mountains with slope greater than $20^{\circ}$, however, at present, the "Marginal Cropping Land Policy" recommends cropping lands with slope bigger than $8.5^{\circ}$ to forest land. In 1961, in "Land Reclamation of One Million Hectare", North Korea reclaimed additional cropping lands with slope bigger than $8.5^{\circ}$, and currently, the "Act on Forestry" states to enforce reforestation with slope bigger than $20^{\circ}$. This study recommends that South Korea aids for forest land restoration in North Korea based on the different stages of their development on reconciliation and cooperation between South and North Korea.

• Journal of Welding and Joining
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• 제6권4호
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• pp.44-53
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• 1988

The mechanical strengths of buried lamellar tears located near the weld toe in the welded tee joints were evaluated in terms of the loss of load carrying capacity as a function of tear area. In static loading, the load carrying capacity was significantly reduced when tear intercepted over 10% of the cross-sectional area of the welded joints. However, the welded joints containing buried tears still failed at stresses over the yield strength of the base metal in the through-thickness direction in spite of the presence of tears up to 20-25% of the area. Fatigue strength of welded joints containing tears markedly reduced with increasing tear areas. Lehigh lamellar tearing test used in this study to produce speicmens was described in detail. The load carrying cpapacity in static loading was influenced by the reduction of supporting area whereas that in fatigue loading was influenced by the stress-concentration effects of lamellar tears and the reduction of supporting area. In bend tests, the pre-existing lamellar tears always grew up toward the weld toe. However, in fatigue loading, cracks grew up and down simultaneously form both the weld toe and the top of lamellar tears because of stress concentration. In fatigue loading, delaminations and decohesion of inclusion/matrix interface generated in multipass welds provided crack propagation paths and enhanced crack propagation because the tips of delaminations and deconhesios acted as stress raisers.

• 지적과 국토정보
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• 제46권2호
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• pp.57-77
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• 2016

본 연구는 주거지 내 상업화가 활발하게 일어나고 있는 가로수길을 대상으로 제인제이콥스의 활성화 가로 요인을 적용하여 활성화 요인들의 공간적 상관관계를 분석하였으며, 동질성을 갖는 특성들끼리 군집을 이루고 있는 유형을 분류하였다. 연구결과를 바탕으로 다음과 같은 연구의 시사점을 도출할 수 있다. 첫째, 가로수길은 의류 및 잡화 등 패션가로의 주된 장소성 기능이 집중되어 특색있는 가로를 형성하고 있었고, 주변 식음용도의 상점들이 그 기능을 받쳐주는 요인이 되고 있다는 것을 알 수 있었다. 둘째, 건축면적 외 공지의 활용여부를 보면, 메인가로는 쇼윈도 진열 및 상품의 적재가 이루어지고 내부의 음식점 및 카페는 테라스형 좌석 조성, 그리고 간선도로변은 보행공간으로서 이용되고 있는 것으로 나타났는데, 간선가로와 메인가로는 물판 위주 및 통과공간으로서의 기능이 강화되고 휴식을 취하거나 체류할 수 있는 공간은 내부 블록에서 형성된다는 것을 알 수 있다. 셋째, 가로수길 내에서 건축물의 신축과 공실이 이어지는 소모적인 현상은 도심공동화와 가로가 가지는 자체의 정체성을 상실하는 주거환경의 부정적인 효과로 이어질 수 있어서 주거민과 상인이 협력하여 발전시킬 수 있는 노력이 필요할 것이다.

• 한국작물학회지
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• 제50권4호
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• pp.256-261
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• 2005

The experiment was conducted at the Ban­gabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur to study the response of chickpea (Cicer arietinum L) to dual inoculation of Rhizobium and arbuscular mycorrhiza, poultry litter, nitrogen, and phosphorus on spore population and colonization, nodulation, growth, yield attributes, and yield. The performance of Rhizobium inoculant alone was superior to control in all the parameters of the crop studied. Among the treatments dual inoculation of Rhizobium and arbuscular mycorrhiza in presence of poultry litter performed best in recording number and dry weight of nodules, dry weight of shoots and roots, number of pods/plant, number of seeds/pod, and seed yields of chickpea. The highest seed yield of 3.96g/plant was obtained by inoculating chickpea plants with dual inoculation of Rhizobium and arbuscular mycorrhiza in association with poultry litter. Treatments receiving dual inoculation of Rhizobium and arbuscular mycorrhiza in presence of nitrogen and phosphorus, Rhizobium inoculant in presence of nitrogen and phosphorus, and that of arbuscular mycorrhiza in presence of nitrogen and phosphorus were similar as that of treatment receiving dual inoculation of Rhizobium and arbuscular mycorrhiza in presence of poultry litter. From the view point of nodulation, growth, yield attributes, and yields of chickpea, dual inoculation of Rhizobium inoculant and arbuscular mycorrhiza along with poultry litter was considered to be the balanced combination of nutrients for achieving the maximum output from cultivation of chickpea in Shallow Red Brown Terrace Soil of Bangladesh.

• 한국지역지리학회지
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• 제18권4호
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• pp.351-363
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• 2012

한반도는 주변의 북중국, 일본과 같이 지구조적 활동이 활발한 지역들에 비해 상대적으로 안정된 것으로 알려져 있다. 그럼에도 불구하고 한반도 남동부 지역을 중심으로 지속적으로 보고되고 있는 제4기 단층의 존재는 한반도의 신기 지체구조 운동의 성격을 본질적이고 구체적으로 이해할 필요가 있음을 시사한다. 경주시 양남면 일대에서 확인된 수렴단층과 읍천단층은 그 최종 운동 시기가 제4기 후기로 확인되고 있어 현생 지구조 체계 하에서 발생하고 있는 지각 변형 사건임을 분명히 지시해 주고 있다. 이들 단층운동과 관련된 동-서 방향의 최대 압축 응력은 인도-호주판과 유라시아 판의 충돌 응력이 원거리에 전파되는 과정에서 발생하는 것으로 이해된다. 특징적으로 한반도 남동부 지역의 제4기 단층들은 반복적 재활성 가능성이 크므로 잠재적 지진 재해에 대비해야 할 것으로 판단되며, 특히 본 연구는 연구 지역 내에 위치하고 있는 원자력 발전소 인근의 지진 안정성에 관한 중요한 단서를 제공하고 있다.

• 한국실내디자인학회논문집
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• 제22권4호
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• pp.121-129
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• 2013

This study was aimed at determining the characteristics of circular multi-family housing under the assumption that the shape of a residential building affects local identity. A total of six case studies were included in this study, three case studies on idle historical industrial facilities turned into residential buildings and another three on multi-family housing located in newly developed residential complexes. The study drew its conclusions as follows. First, the design of circular multi-family housing was intended to maximize security and defense from the outside in older times. This was later developed as the terrace house style with geometric urban squares designed under the urban planning of the Baroque period. This evolved high-density housing with a courtyard in the center offering a green open space, with the aim of restoring a sense of humanity. Second, the six case studies on circular multi-family housing were analyzed from the viewpoint of each factor of local identity, including historical and cultural, landscape, and community. Third, the historical and cultural elements of circular multi-family housing are found in some unused historical industrial facilities remodeled into residential buildings. They provide new capabilities and shapes desired by society at a given time, while maintaining familiar styles and elements of history, integrating a legacy of the past into the present. Fourth, circular multi-family housing with unique shapes and structures often become landmarks of a region with their distinctive appearance against a uniform urban environment and the monotonous scenery of residential complexes. They also show a high level of visual awareness with the distinctive shapes made possible when new elements are added to a historical exterior. Finally, circular multi-family housing with courtyards in the center prompt social contact between inhabitants, especially with dormitories and rental houses for the low-income bracket, which provide a small individual units with high use common space. Circular multi-family housing are planned in a manner similar to a small village or a city. They are designed to enhance sense of community, allocating various public amenities and provide cultural and commercial spaces on the ground floor and courtyard areas.