• 지구물리와물리탐사
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• 제9권3호
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• pp.231-240
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• 2006

화산섬 제주도에서 용암분출에 따른 물리검층 반응특성을 고찰하기 위하여 다양한 물리검층을 수행하였다. 지질조사 목적으로 다양한 물리검층을 수행한 사례가 없어 제주도 지질의 특이성에 대한 이해의 폭이 물리검층 자료의 해석에 매우 중요한 역할을 한다. 제주도의 지하수자원의 체계적인 개발과 보전 목적으로 해안을 중심으로 해수침투관측망을 구축하고 있다. 이들 해수침투관측망 중에서 나공 시추공에 대한 물리검층 결과, 지하수위 하부인 포화대 구간에서의 물리검층 반응은 용암의 누층과 관련된 반응이 뚜렷이 확인되었으며 특히, 중성자검층, 감마-감마(밀도)검층 및 전기비저항검층은 용암유동의 특성을 잘 반영하였다. 수중화산쇄설성퇴적층은 높은 공극률, 낮은 전기비저항과 밀도를 나타냈다. 제주도 지역에서 수행한 물리검층 자료는 지질학적인 특성을 잘 반영하고 있어 물리검층의 적용성이 높은 것으로 판단된다.

• Journal of Ecology and Environment
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• 제34권2호
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• pp.137-147
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• 2011

In 2009, United Nations Educational, Scientific and Cultural Organization (UNESCO) recognized the unique outstanding ecosystem biodiversity and distinct ecocultural values of the Shinan Dadohae Biosphere Reserve in the island region. The Dadohae area, which has been sustainably conserved for scores of years, boasts not only a unique ecosystem, but also has residents with a wide range of traditional ecological knowledge. In terms of understanding the soundness of the ecosystem network known as the landscape system, the recent expansion of environmental development has served to heighten the degree of consideration given not only to biodiversity, which has long been used as an indicator to assess ecosystem soundness, but also to assess cultural diversity. Man has used the surrounding landscape and living organisms as his life resources since the beginning. Moreover, whenever necessary, man has developed new species through cultivation. Biodiversity became a foundation that facilitated establishing cultural diversity such as food and housing. Such ecological knowledge has been conveyed not only to adjacent regions, but also at the international level. The recent rapid changes in the Dadohae area island ecosystem caused by the transformation of fishing grounds by such factors as climate change, excess human activities, and marine pollution, is an epoch event in environmental history that shows that the balance between man and nature has become skewed. Furthermore, this issue has moved beyond the biodiversity and landscape diversity level to become an issue that should be addressed at the cultural diversity level. To this end, the time has come to pay close attention to this issue.

• 한국정보통신학회논문지
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• 제6권7호
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• pp.1001-1005
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• 2002

도서와 도서, 내륙과 도서간의 통신서비스를 제공하는 방식으로는 무선통신방식, 해저광케이블방식, 위성통신방식이 있다. 이들 방식 중에서 각 도서의 지형적 특성 및 거리 그리고 경제성 등을 고려하여 합리적인 도서통신방식을 선택하여야 한다. 2002년 3월에 발표한 일본의 장기증분비용(LRIC)모형에서는 해저케이블, 무선통신설비 및 위성통신설비를 추가하여 도서통신에 대해서 보다 적정한 비용산정을 가능하게 하였다. 본 논문은 일본의 도서통신 재설계 모형을 고찰함으로써 앞으로 우리나라 실정에 맞는 도서통신 재설계 모형개발에 일조를 하게 될 것이며, 가입자선로공동활용을 위한 대가산정 모형 및 접속료산정모형에 활용할 수 있을 뿐만 아니라 보편적 서비스 손실보전금을 결정하기 위한 모형으로 활용할 수 있을 것이다.

• 한국환경복원기술학회지
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• 제4권2호
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• pp.84-91
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• 2001

This study was carried out to develop the technology of artificial floating island for the wild-life habitat at the reservoir of Korea University farm near Seoul. After the execution of an artificial floating island with 6 cells(each $3{\times}3m$), each cell was planted with 5 different species and one mixed of them, to the reservoir in 1999 through 2000. The monitored results were as follows; 1. Typha orientalis, Zizania latifolia and Oenanthe japonica were died back, but Phragmites communis, Phragmites japonica and Juncus effusus var. decipiens were well growing. 2. The limits of sinking water depth of the planting foundation were different with the plant species, that is, 40cm to the Juncus effusus var. dicipiens and 50cm to Phragmites communis. Accordingly the water depth should be kept differently with each species. 3. 33 species of fauna were monitored in the first year(1999) and 43 species in the second (2000) increasingly. 4. For the more wild-lives inducing to the artificial floating island, establishing the eco-corridor from the surrounding environment was needed.

• 토지주택연구
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• 제9권4호
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• pp.10-18
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• 2018

As the volatility increasement of the number of tourist, there was been controversy over supply-demand imbalance in hotel market. The purpose of this study is to analysis on determinants of hotel occupancy rate in Jeju Island. The quantitative method is based on cointegrating regression, using an empirical dataset with hotel from 2000 to 2017. The primary results of research is briefly summarized as follows; First, there are high relationship between total hotel occupancy rate and hotel occupancy of foreign tourist. The volatility of hotel occupancy is caused by foreigner user than local tourists though local tourist high propotion of hotel occupancy in Jeju Island. Second, hotel occupancy of local tourist has not relationship with demand and supply variables. Because some hotel users are not local tourists but local resident, and effects to other variables of hotel consumer trend, accommodation such as Guest house, Airbnb. Third, there are high relationship between foreign hotel occupancy rate and demand-supply variables. These research imply that total management of supply-demand is very important to seek stability of hotel occupancy rate in Jeju Island. Also it can provide a useful solution regarding mismatch problem between supply-demand as well as development the systematic forecasting model for hotel market participants.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2002년도 추계종합학술대회
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• pp.924-927
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• 2002

도서와 도서, 내륙과 도서간의 통신서비스를 제공하는 방식으로는 무선통신방식, 해저광케이블방식, 위성통신방식이 있다. 이들 방식 중에서 각 도서의 지형적 특성 및 거리 그리고 경제성 등을 고려하여 합리적인 도서통신방식을 선택하여야 한다. 2002년 3월에 발표한 일본의 장기증분비용(LRIC) 모형에서는 해저케이블, 무선통신설비 및 위성통신설비를 추가하여 도서통신에 대해서 보다 적정한 비용산정을 가능하게 하였다. 본 논문은 일본의 도서통신 재설계 모형을 고찰함으로써 앞으로 우리나라 실정에 맞는 도서통신 재설계 모형 개발에 일조를 하게 될 것이며, 가입자선로공동활용을 위한 대가산정 모형 및 접속료산정 모형에 활용할 수 있을 뿐만 아니라 보편적서비스 손실보전금을 결정하기 위한 모형으로 활용할 수 있을 것이다.

• 수산해양교육연구
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• 제27권3호
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• pp.747-756
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• 2015

Brown alga Undaria peterseniana has been interested in the commercial scale aquaculture for warm water species development in southern coastal area of Korea. However, this species was classified an endangered species caused by a decrease in habitat and natural population. In this study, inhabit characteristics of U. peterseniana was investigated in their natural habitat of Ulleung Island, Korea. The U. peterseniana population was occurred dense patches at 20~30m depth. Total length of the alga reached 1.0~2.0m and the largest width ranged 10.0~35.0cm during the study. In 2013, habitats of this species increased two sites compared with the previous year and their distribution extended to low depth (10m) of coastal area. In long-term data, seawater temperature revealed a continuous increment by strong going north of East Korea Warm Current or Ulleung Warm Eddy turning around the coast of Ulleung Island. It suggested that habitat extension of U. peterseniana may be caused by suitable settlement condition and increase of warm water around the coastal area. Current studies of this species may be continuously required in the possibility of fisheries resources as aquaculture species and index species of increment of water temperature at the fixed monitoring site in East Sea. This is the first study to research ecological feature U. peterseniana population at the natural habitat of Ulleung Island.

• 수산경영론집
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• 제49권4호
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• pp.53-68
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• 2018

The industrial structure of Chuja Island is mainly occupied by fisheries. Since the fisheries resources have been depleted and the marine environment has been changed, the fishery industry has been hard to survive. It is the time when residents are looking for a breakthrough in the tourism industry. Market segmentation is a valuable tool in the establishment of marketing strategies. Segmentation of tourists by the same desire and motivation is an essential factor in identifying the characteristics of tourists. The research on market segmentation of tourism sector focuses mainly on demographic subdivision, psychological subdivision, and behavioral subdivision, so it is urgent to study geographical market segmentation. The purpose of this study is to present data that can be used to establish a marketing strategy for tourism promotion in Chuja Island by analyzing the tourism activities via subdivision market according to demographic characteristics, tourism behavior characteristics, and tourism motivation after grasping the geographical segment of tourists through empirical analysis. In this study, 285 valid samples were analyzed by frequency analysis, ${\chi}^2$ test, cluster analysis and ANOVA test.

• 한국해양공학회지
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• 제37권1호
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• pp.8-19
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• 2023

In recent years, modular-type floating islands have been considered as a promising option for future ocean space utilization. A modular floating island consists of a number of standardized pontoon-type modules and connectors between them. In this study, the motion responses of a modular floating island in waves was investigated based on frequency-domain numerical analysis. The numerical method is based on the potential flow theory and adopts a higher-order boundary element method with Green's function. First, motion RAOs were directly compared with the model test data by reference to validate the present numerical method. Then, numerical investigations were conducted to analyze the motion characteristics of the floating island by considering various modules shapes and arrangements. It was found that motion responses were reduced in a single central module compared to when divided central modules were used. Finally, the effect of modular arrangement on the motion responses in irregular waves was discussed. It was confirmed that multiple-layer outer modules are more effective in calming the central module than using single-layer outer modules, except under very long period conditions.

• 한국지형학회지
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• 제27권2호
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• pp.47-64
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• 2020

The Baengnyeongdo-island, located at the northernmost point of the west coast, has developed several coastal landforms. Although the coastal landforms of Baengnyeongdo-island are widely used as a tourism resource, a lot of academic research has not been conducted. In this study, particle size analysis, XRF, and OSL age dating were performed on the BR sandy deposits to find out the formation of coastal sand dunes on Baengnyeongdo-island. Based on the physicochemical properties, the BR section was divided into three parts; BR-A, BR-B and BR-C. First, about 56ka, which corresponds to the MIS 3, fine sand was deposited and forms the BR-C section. Second, the BR-B which located middle part of BR section, showed reversed age stratigraphy. The BR-B was interpreted as reworked sediments based on sedimentary facies and chemical weathering intensity. And, the BR-A composed of fine and medium sands was formed in middle Holocene. This research has significance in that it finds out the paleo sand dunes formed in Pleistocene. This study can contribute to understanding coastal sand dune development on the west coast.