• Proceedings of the Korean Geotechical Society Conference
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• 1992.10a
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• pp.87-94
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• 1992

근래 인공섬은 그 수가 많아지고 또 그 크기도 방대해지고 있다. 이 논문은 인공섬의 완성에 앞선 각과정에 대한 제반 문제점들에 대한 지반공학적 분석결과를 포함한다. 최근 인공섬 형성 과정에 사용하는 신공법에 개발되었다. 인공섬의 형성은 단일 공법에 의한 것이 아니고 여러가지 공법의 홍용의한다. 따라서 각 공법에 대한 완벽한 이해는 사업자체의 성공적인 완료와 경제성에 지대한 영향을 준다. 인공섬은 해성퇴적층에 위치하게 된다. 따라서 해성퇴적층의 형성과정, 환경, 퇴적 후의 변화 그리고 지반공학적인 자료가 채취되어야하고 분석되어야 한다. 해성퇴적층에 위치할 인공섬 완료에 필요한 조사, 설계 및 시공에서 반드시 고려되어야 할 과정이 실무자들이 이해하고 사용할수 있는 형식으로 제시되었다. 불완전한 자료, 또 그것에 근거한 설계 및 시공이 줄 수 있는 결과에 관해 기술했다.

• Journal of Applied Biological Chemistry
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• v.58 no.1
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• pp.51-54
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• 2015

Flavonoids from Morus alba fruits were evaluated for recovery effect on the damage of alloxan-induced pancreatic islet in zebrafish. Alloxan treatment on the zebrafish embryo surely decreased the pancreatic islet size (p <0.001). Rutin, isoquercetin, and quercetin very significantly recovered the size (p <0.001) and the fluorescence intensity of pancreatic islet.

• The Journal of the Korean bone and joint tumor society
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• v.10 no.1
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• pp.56-60
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• 2004

A bone island represents a focus of mature compact bone within the cancellous bone. It can be diagnosed based on characteristic clinical and radiologic features. The lesion is typically asymptomatic with a preference for the pelvis, femur, and other long bones. On the radiologic study, the lesion appears as an ovoid, round, or oblong homogeneously dense and sclerotic focus in the cancellous bone. Characteristic feature of this lesion is radiating bony streaks, known as "thorny radiations" or "pseudopodia". Most bone islands are small, and majority of the lesions measure from 0.1 to 2.0 cm. Giant bone island, defined as a diameter greater than 2 cm, has been rarely reported in the literature. We report a case of giant bone island measured by 10${\times}$1.7${\times}$1 cm in the diaphysis of right tibia in 31-year-old man.

• 한국전자현미경학회:학술대회논문집
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• 1999.11a
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• pp.54-58
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• 1999

GaAs 위에 증착된 ZnTe 박막의 계면 구조를 투과 전자 현미경을 이용하여 관찰하였다. 2-빔 조건을 사용하여 관찰된 계면에서 모아레 즐무늬가 관찰되었으며, 이러한 모아레 줄무늬의 생성원리를 규명하였다. 또한 고분해능 투과 전자현미경상으로부터 얻어진 결과와 비교하여 ZnTe의 성장방식 전이 및 섬 구조를 가지는 ZnTe 박막의 여러 가지 구조적 성질들 - 섬의 크기, 변형량, $60^{\circ}$ 전위의 분포 등 - 에 대해 밝혔다. 이러한 결과들은 큰 변형량이 걸린 반도체 이종 접합 구조의 해석에 일반적으로 적용될 수 있다.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 2009.05a
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• pp.103-103
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• 2009

플라스틱 기판위에 스퍼터링과 열 기상증착법을 이용하여 코팅된 주석 박막을 관찰하여 주석 박막의 형상 변화에 영향을 미치는 공정 요인을 알아보았다. 열 기상증착법에 의해 코팅된 주석 박막은 주석 소스의 양에 따라 쉽게 형상을 제어할 수 있었다. 하지만 박막과 기판의 부착력이 낮아 쉽게 박리가 일어났다. 스퍼터링으로 콘팅된 주석 박막은 기판과 부착력은 높았으나 코팅 시 인가된 전원의 세기, 코팅 시간, 코팅 시 진공도등 다양한 공정인자 조절에도 불구하고 형상에 큰 변화는 관찰하지 못하였다. 전원의 세기가 증가하면 주석의 섬 크기가 증가하고 코팅 시간이 늘어나면 전원의 세기가 증가한 것과 유사한 형상 변화가 있어다. 주석 박막 코팅 시 공정 압력은 낮추면 주석 섬의 크기가 감소하였는데 이는 스퍼터된 주석 이온의 평균 자유 행로가 길어져 비교적 작은 핵형성에 의해서 나타난 현상으로 판단된다.

• Korean Journal of Plant Taxonomy
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• v.37 no.4
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• pp.431-446
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• 2007

The purpose of this study is to review the taxonomical position of Phytolacca insularis Nakai based on morphological characters and ITS sequences. Phytolacca insularis was similar to P. acinosa in the stem shape, inflorescence, apocarpous, eight pistils, eight stamens, pink anther, and eight fruits. But the unique difference between P. insularis and P. acinosa was leaf size and pistil color. Phytolaccri insularis and P. acinosa have a similar sculpturing patterns as an foveolate and microscabrate in pollen, but they differed from P. americana in having a bigger foveolae size in sculpture pattern. Phytolacca insularis and P. acinosa were similar in the seed size but different from P. americana by having a small size of seed. The seed surface of P. insularis and P. acinosa was similar with a irregularly undulate shape, but its feature of P. americana differed in having the reticulate shape. Phytolacc a insularis had identical ITS sequences with P. acinosa. Phytolacca insularis and P. acinosa have a close relationship in the morphological characters and ITS sequences. The examinations of morphology and ITS sequences suggest that P. insularis be a form of P. acinosa although it has been formerly treated as a distinct species.

• Korean Journal of Environment and Ecology
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• v.36 no.4
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• pp.433-441
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• 2022

Light pollution is one of the factors that disturb coastal and island ecosystems. This study examined the factors causing light pollution in the islands in Daedohaehaesang National Park using nighttime satellite images. This study selected 101 islands with an area of 100,000 m² or more in Daedohaehaesang National Park, and measured the levels of light pollution of the selected islands by calculating mean nighttime radiance recorded in VIIRS DNB monthly images for January, April, August, and October 2019. Of seven districts of the park, The highest mean nighttime radiance was recorded in Geumodo district (17,666nW/m²/sr), followed by Geonumdo·Baekdo, Narodo, Soando·Cheongsando districts. By season, mean nighttime radiance in October was the highest at 9,509nW/m²/sr, followed by August, January, and April. Regression analyses show that the total floor area and the number of lighthouses in a 5 km buffer area had a statistically significant effect on mean nighttime radiance at all times, but those within the island did not, indicating that light pollution in islands in a national park where land development is strictly restricted is influenced by artificial lights in nearby areas. However, the total floor area of an island significantly affected mean nighttime radiance only in August, which appears to be attributed to the impact of intensive use of artificial light by visitors during summer vacation. The size of an island had a negative (-) effect on nighttime radiance. This negative effect suggests that light pollution is a type of ecological edge effect, i.e., the smaller island is more likely to have a relatively larger proportion of edge area that is affected by light emitted from the neighboring areas. The results of this study indicate that managing artificial lights in nearby areas is necessary to mitigate light pollution in islands in marine and coastal national parks.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.4
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• pp.141-145
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• 2012

In a Ubiquitous sensor network environment, the sensor node is in general small and low price, and operating with power limited battery. The reliable TCP/IP protocol is used for transmitting sensed data from the sensor node. A new method was proposed in order to overcome the limitation of small embedded memory, but it is difficult to use for the case of frame error. In this paper, a new algorithm is proposed to manage the receiving frame error or loss, and it is appropriate to the sensor network to send sensed data periodically.

• Journal of Korean Society of Transportation
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• v.27 no.2
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• pp.107-115
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• 2009

Traffic islands were introduced for drivers and pedestrians to use the road in a safe and orderly way and were also a specified zone between traffic lanes to divide conflicting traffic flows and to provide pedestrian refuge. However, existing research and relevant standards described its purpose and effects only but not a safety standard to decide whether the traffic island warranted. This study was to introduce a parameter which had a high relationship with accidents by analyzing road and traffic conditions and traffic accident data at urban intersections. Based on the relationship between the parameter and the traffic accidents at the intersection, a pedestrian accident probability model was made by using a logit model. In addition, the study reviewed a pedestrian accident probability corresponding to traffic volume and size of the intersection during design of the intersection and then suggested the effectiveness of the traffic island in terms of traffic safety. In conclusion, when a large-scale intersection has significant traffic volumes, a high probability of traffic island-induced pedestrian accidents appears, while in the case of small volumes, the probability is low. Targeted design and operations of a traffic islands is necessary, because its introduction itself does not enhance pedestrian safety in all cases at all intersections. This study can be a useful reference for further development to set up a scheme of the traffic islands in terms of traffic safety.

• 한국해양학회지
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• v.22 no.1
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• pp.9-18
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• 1987

A number of hydrographic studies and some recent current measurements around Chejudo Island suggest an existence of a clockwise residual flow in the west and north coasts of the island all the year round. On the eastern side of the island the Tsushinma Current flows northward and northeastward. The contribution of tide-induced residual currents to the observed residual. flow around the island was examined here through numerical solution of the two-dimensional nonlinear shallow-water equations. The calculated tide-induced residual currents show a clockwise circulation around the island. Significant residuals of 2-4cms$\^$-1/are confined over sloping bottom topography around t he island and the far-field residuals are negligibly small. The inclusion of a permanent current into the model was also attempted in order to see the effects of the Tsushima Current system on the residual circulation around the is land. It was found that combined effects of tide-induced residuals and the permanent current field associatedwith the Tsushima Current explain qualitatively not only the observed clock wise residuals in the west and north coasts but also the northward flow on the eastern side of the island.