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Plant list of Bieyang island (비양도식물상)

  • 이영노;이명보
    • YAKHAK HOEJI
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    • v.3 no.1
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    • pp.35-44
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    • 1957
  • According to know the botanical flora at the Bieyang Island, located in the frone of Jae-Ju-Island toward west and north, the plant list at the island wa investigated in July, 1955. According to the investigation, the following resume is summarized; 1. Bieyand Island is a small volcano that rose from the sea 942 years ago. Nakai Monosing, a Japanese botanist, had reported 72 species of plants on this island in 1913 indicating 22 residential houses at that time. 2. Resulting on the investigation this time, 184 species of plants are collected. This indicates that the additional 112 species of plants should be added to the number of species that Nakai found. 3. This increase of species of plants, might be caused possibly due to carrying by wind, tidal current, bird, and human, during this time being indicating increase of residential houses from 22 in 1913 to 40 in July 1955. 4. Most of the collected plants are sea-coast and meadow plants. Among them, 44 are thellophytes and 90 hemicreptophytes. This indicates dry climate of the island. 5. The most dominant among them is Imperata cylindrica var., Koenigii. 6. This island could be acceptable for growth of island wood plants, we believe.

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A herbological study on the wild edible plants of Ulleung island (울릉도 특산 산나물에 대한 본초학적 고찰)

  • Seo, Bu-Il
    • The Korea Journal of Herbology
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    • v.27 no.2
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    • pp.31-36
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    • 2012
  • Objective : For the purpose of making use the wild edible plants of Ulleung island smoothly, this study was designed. Method : For the first time, I searched the wild edible plants of Ulleung island from various data. And I examined herbological books and research papers on the wild edible plants of Ulleung island. Result : The herbaceous plants in Ulleung island were 12 family and 22 species, Compositae and Liliaceae plants take the highest number of them. The woody plants in Ulleung island were 1 family(Araliaceae) and 2 species. The herbal medicines that originated from the wild edible greens of Ulleung island were 25 species. The herbal medicines that have the effects of clearing away heat(淸熱), eliminating toxin(解毒), subduing swelling(消腫) and promoting blood circulation to remove blood stasis(活血祛瘀) take the highest number of the effects of these herbal medicines. Conclusion : For the purpose of making use the wild edible plants of Ulleung island smoothly, we should recognize not only medical benefits but also matters that pay special attention.

A Study on the Alkali Hydrolysis of Sea-island PET Ultra-microfiber (해도형(海島型) PET 초극세섬유의 알칼리 가수분해에 관한 연구)

  • Seo, Mal Yong;Lee, Jun Hee;Ok, Chi Min;Cho, Seong Hun;Lee, Jong Woo;Cho, Ho Hyun
    • Textile Coloration and Finishing
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    • v.25 no.4
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    • pp.303-313
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    • 2013
  • Alkali hydrolysis of sea-island PET 0.02denier microfiber were compared to those on the fabrics of the 0.06denier microfiber. In the dissolution of the sea component out of sea island type ultra-microfiber, it is important to determine the optimum division and divided material. Weight reduction of sea island ultra-micro sea island fiber was faster than regular PET about 10 times. Also 0.2denier sea-island ultra-micro sea island fiber has better color fastness (washing, friction, and daylight) than 0.06denier level sea-island ultra-microfiber. In this study, 0.2denier ultra-micro sea island fiber shows the possibility of high value product.

Distribution Characteristics of Black-faced Spoonbill Platalea minor in Western Coast of South Korea

  • Lee, Woo-Shin;Hur, Wee-Haeng;Rhim, Shin-Jae
    • The Korean Journal of Ecology
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    • v.24 no.4
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    • pp.219-222
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    • 2001
  • The study was conducted to get the basic information for proper protection and management of black-faced spoonbill and their habitats in western coast of South Korea. The species was observed in 8 sites of western coast of South Korea in spring 2000. We confirmed breeding of this species at least 4 pairs in Seokdo island. This island is considered likely to be an imortant breeding site together with Yodo island, Hambakdo island and Yokdo island. Also, we observed breeding of herring gull in Seokdo island and small island nearby Boleumdo island for the first time in South Korea. Chilsando island, Cheonsuman bay and Gyeokyeolbiyeoldo island were considered as stopovers located on the Korean Peninsula route. The other sites were considered as summering sites of the black-faced spoonbill. Especially the birds were constantly observed from breeding season to postbreeding season in Seonduri and Yeochari of Ganghwado island. We have counted maximum 88 individuals gathered at Gaksiyeo in Seonduri and Yeochari on September 3, 2000. The species seemed to gather at these sites after breeding for migration to wintering ground in September. We also surveyed changes of the number of individuals as time of the ebb and flow on September 3 and 6, 2000, their time budgets were affected by the ebb and flow in these sites.

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Engineering characteristics and eco-cultural potential of spring in Jeju Island

  • Koh, Byoung Ryoun
    • Proceedings of the Korea Water Resources Association Conference
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    • pp.218-218
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    • 2019
  • Jeju island has an area of $1,810km^2$ and is considered the largest island in South Korea. In Jeju Island the average annual precipitation is 1,957mm. About 54% of precipitation is estimated to be lost due to evapo-transpiration and direct runoff, and the remainder is recharged. Historically springs and puddles were the island's primary sources of water. However, after 1970 all sectors, including the urban and industrial sectors depended solely on groundwater as their water resource. As vast amount of water is being recharged the Island has many springs, especially near the coastlines. Historlcally, spring of Jeju Island formed village and make it possible to continue a life. Also it produces many values such as the spring related story, culture, tourism and ecosystems. Especially, the naturally rare phenomenon that about 900 springs appear over the whole area of Jeju Island makes it possible to call it as a natural heritage. As a result of this most springs have either been destroyed or been in the state of neglect. In some cases it has been observed that springs were preserved by nature, however majority of the cases saw springs losing their own nature as a result of abandonment. It was recorded that there were 911 springs in Jeju Island with most of them being distributed along the coast, which consequently increases their susceptibility to seawater intrusion. The objective of this study is therefore to analyze Eco-cultural and Engineering characteristics about springs in the island, highlighting its past utilization and reestablishing its potential as a source of spring.

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An empirical study on the Definition and Classification Methodology of Urban Heat Island Areas (도시열섬 지역에 대한 정의 및 구분 방법론에 관한 비교연구)

  • Kim, Kijung;An, Youngsoo
    • Journal of the Korean Regional Science Association
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    • v.33 no.2
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    • pp.47-59
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    • 2017
  • The purpose of this study is to examine various definitions of urban heat island and to analyze the characteristics and differences of each methodology by applying each methodology for deriving the heat island region to Seoul. The definition of the heat island is divided into the atmospheric heat island and the surface heat island according to the utilized temperature data. The methodology for deriving the heat island area differs depending on the comparison method and the spatial extent of the analysis. As a result of analyzing each methodology for Seoul city, it was confirmed that the heat island area of Seoul is different according to temperature data. Also, it is confirmed that the distribution range of the heat island area is different according to the spatial range of analysis. This shows that even if the heat island area is analyzed for the same space and the same view point, the heat island area is derived differently according to each methodology. This study can be used as a basic study to solve the urban heat island problem in the future.

Characteristics of tidal current and tidal induced residual current in the channel between Geumo Island and An Island in the southern waters of Korea (금오도-안도 협수로 해역의 조류 및 조석잔차류 특성)

  • CHOO, Hyo-Sang
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.57 no.3
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    • pp.214-227
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    • 2021
  • The distribution of tidal current and tidal induced residual current, topographical eddies and tidal residual circulation in the waters surrounding the Geumo Island-An Island channel were identified through numerical model experiments and vorticity balance analysis. Tidal current flows southwest at flood and northeast at ebb along the channel. The maximum flow velocity was about 100-150 cm/s in neap and spring tide. During the flood current in the neap tide, clockwise small eddies were formed in the waters west of Sobu Island and southwest of Daebu Island, and a more grown eddy was formed in the southern waters of Geumo Island in the spring tide. A small eddy that existed in the western waters of Chosam Island during the ebb in neap tide appeared to be a more grown topographical eddy in the northeastern waters of Chosam Island in spring tide. Tidal ellipses were generally reciprocating and were almost straight in the channel. These topographical eddies are made of vorticity caused by coastal friction when tidal flow passes through the channel. They gradually grow in size as they are transported and accumulated at the end of the channel. When the current becomes stronger, the topographic eddies move, settle, spread to the outer sea and grow as a counterclockwise or clockwise tidal residual circulation depending on the surrounding terrain. In the waters surrounding the channel, there were counterclockwise small tidal residual circulations in the central part of the channel, clockwise from the northeast end of the channel to northwest inner bay of An Island, and clockwise and counterclockwise between Daebu Island and An Island. The circulation flow rate was up to 20-30 cm/s. In the future, it is necessary to conduct an experimental study to understand the growth process of the tidal residual circulation in more detail due to the convergence and divergence of seawater around the channel.

Characteristics of Tidal Current and Tidal Residual Current in the Archipelago Around Aphae Island in the Southwestern Waters of Korea (한국 서남해 압해도 주변 다도해역의 조류 및 조석잔차류 분포)

  • Choo, Hyo-Sang;Kim, Dong-Sun
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.24 no.2
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    • pp.179-187
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    • 2018
  • In order to understand the flow of currents around Aphae Island and the surrounding Archipelago, the numerical model experiments on tidal currents and tide-induced residual currents were carried out. Dominant semidiurnal tidal currents have a reversing form and flow along the narrow channels of the archipelago. During periods of flood, currents flow from the west of Hwawon Peninsula to the archipelago to the northwest together with the currents flowing from the channels at Palgeum Island to Amtae Island and Amtae Island to Jeung Island. Ebb currents flow from the northwest archipelago to the channel of Amtae Island and Jeung Island as well as Amtae Island to Palgeum Island, further flowing south between Palgeum Island and Hwawon Peninsula. Flood currents are separated from east and west at the southern coast of Aphae Island, but flow south from both the west and east of Aphae Island to the channel found between Palgeum Island and Hwawon Peninsula at ebb. Flow speed is high between Amtae Island and Aphae Island where the flows meet and join. Lee wakes or topographical eddies are formed around the islands due to the high speed of the currents flowing along the narrow channel in the archipelago, manifesting as a tide-induced residual current. A weak cyclonic wake and anti-cyclonic eddy both exist at the west and northwestern coast of Aphae Island individually. The speed of the tide-induced residual current become slow on account of the wide littoral zone at exists around Aphae Island.

A Landscape Interpretation of Island Villages in Korean Southwest Sea (한국 서남해 섬마을의 경관체계해석 -진도군 조도군도, 신안군 비 금, 도초, 우이도 및 흑산군도를 중심으로-)

  • 김한배
    • Journal of the Korean Institute of Landscape Architecture
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    • v.18 no.4
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    • pp.45-71
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    • 1991
  • The landscape systems in Korean island settlements can be recognized as results of ingabitants' ecological adptation to the isolated environment with the limited natural resources. Both the fishery dominant industry in island society and ecological nature of its environments seem to have influenced on inhabitants' environmental cognition as well as the physical landscape of island villages such as its location, spatial pattern in each village, housing form and so on. This study was done mainly by both refering to the related documents and direct observations in case study areas, and results of the study can be summarized as follows. 1. In general, the landscape of an individual island seems to take more innate characteristics of island's own, corresponding to the degree of isolation from mainland. That is, while the landscape of island in neighboring waters takes both inland-like and island-innate landscape character at the same time, the one in the open sea far from land takes more innate landscape character of all island's own in the aspects of village location, land use and housing density etc. 2. The convex landform of most islands brings about more centrifugal village allocation than centripetal allocation in most inland villages. And thus most villages in each island face extremely diverse directions different from the south facing preference in most inland rural villages. 3. Most island villages tend to be located along the ecologically transitional strip between land and sea, so called 'line of life', rather than between hilly slope and flat land as being in most inland village locations. So they are located with marine ecology bounded fishing ground ahead and land ecology bounded agricultural site at the back of them. 4. The settlement pattern of the island fishing villages shows more compact spatial structure than that of inland agricultural villages, due to the absolute limits of usable land resources and the adaptation to the marine environment with severe sea winds and waves or for the easy accessability to the fishing grounds. And also the managerial patterns of public owned sea weed catching ground, which take each family as the unit of usership rather than an individual, seem to make the villagescape more compact and the size of Individual residence smaller than that of inland agricultural village. 5. The folk shrine('Dand') systems, in persrective of villagescape, represent innate environmental cognition of island inhabitants above all other cultural landscape elements in the island. Usually the kinds and the meanings of island's communal shrine and its allocative patternsin island villagescape are composed of set with binary opposition, for example 'Upper shrine(representing 'earth', 'mountain' or 'fire')' and 'Lower Shrine(representing 'sea', 'dragon' or 'water') are those. They are usually located at contrary positions in villagescape each other. That is, they are located at 'the virtical center or visual terminus(Upper shrine at hillside behind the village)' and 'the border or entrance(Lower Shrine at seashore in front of the village)'. Each of these shirines' divinity coincides with each subsystem of island's natural eco-system(earth sphere vs marine sphere) and they also contribute to ecological conservation, bonded with the 'Sacred Forest(usually with another function of windbreak)' or 'Sacred Natural Fountain' nearby them, which are representatives of island's natural resources.

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A Study on Information Exploration Characteristic and Relative Importance Evaluation of Island Tourism Web Site (수산해양관광 관련 웹사이트의 정보탐색 특성과 상대적 중요도 평가에 대한 연구)

  • Lee, Dong-Ho
    • The Journal of Fisheries Business Administration
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    • v.41 no.2
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    • pp.81-106
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    • 2010
  • This study examines the information exploration characteristic and relative importance evaluation of island tourism web site. The survey items are developed based on the related studies and also implemented particular way so-called 'semi-online' that including both web based material and offline tutorial. The first objective of this study is verifying the characteristics of information exploration on island tourism of university students. The second is examining the peculiar properties of tourism information that exposed one's individual importance evaluation. The result of this study shows that most of the students have no difficulty in using the internet and exploring the island tourism information. And there is no significant difference in using and exploring the internet between male and female students. Based on the result of this study, most popular type of island tourism information is picture type. Personal blog or user created contents(UCC) that containing the other's experience of island tourism is mostly wanted contents. But there is a significant difference in importance of contents within the students. The community based information which including UCC, blog, and other community user's posting is evaluated the most important information for relatively less experienced students. On the other hand more experienced students have a preference on expertise information which created by tourism experts. The difference within the determinant factors that affecting island tourism also significant. With analysis of variance(ANOVA) on determinant factors, the tourism activity and social/culture resource are less important than others(eg. natural environment, accommodation and so on). The result of this study would be practically used for implementing the local government's effective tourism web site and enhancing the current island tourism operation. And also it gives a advantage to facilitate the island tourism for young generations.