• Journal of Magnetics
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• 제6권1호
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• pp.5-8
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• 2001

Cheju island is composed of volcanic tuff. The soil in Cheju island has principally sprung from basalt and partially made up of trachyte, and andesite. Also ancient relics, plain coarse pottery kilns and pantiles kilns are homogeneously distributed all over the Cheju island. In this study samples of plain coarse pottery and pantiles from five regions of Cheju island have been examined through X-ray fluorescence spectrometer and Mossbauer spectroscopy. It is thought that these samples be partially formed from neutral volcanic rock like trachyte and the valence state of iron is almost $Fe^{3+}$. Also the magnetic hyperfine field of goethite contained in these samples is less than synthetic goethite. This result shows the degradation of magnetic order caused by the partial substitution of diamagnetic positive ion $Fe^{3+}$ by $Al^{3+}$ in the goethite lattice.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.508-513
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• 2009

Significant air temperature increases in urban areas are known as the heat island phenomenon in a global scale. Therefore, we use numerical model in order to analyze quantitative effects by using new & renewable energy on the heat island phenomenon in urban area. The present study quantitatively analyzes the Urban Heat Island Effects, Energy-Saving Effects, and Environmental Load Decrease Effect along New and Renewable Energy Application which is 10% of the Building Energy Consumption.

• 건축역사연구
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• 제27권1호
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• pp.17-28
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• 2018

This study researches the relationship between the Folk houses in Heung Yang-islands and the Ulleung-island Folk Houses in Modern Age. Fork houses reflect cultural and geographical features synthetically and concretely. Fork houses contain the thoughts of residents and have been built rationally and economically, therefore studying fork houses is a very meaningful task. This study has a focus on the elements which influenced fork houses of Ulleungdo at the time when fork houses were constructed officially. There have been studies on fork houses of Ulleungdo limited in embrasive characteristics, space construction and arrangement. So, the purpose of this study is to investigate about the element and background of Ulleung-island Folk Houses in Modern Age.

• 한국환경과학회지
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• 제6권4호
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• pp.303-311
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• 1997

The characteristics of spring machanism In the Cheju Island were analyzed by statistical techniques. Basic characteristics, areal and altitudinal variations, and correlations of spring data were investigated. In this study. however, the subjects of the study are the 451 springs, the whole basin of Cheju Island derided Into four groups. In this study, analyzed the spring phenomena on the basis of both the geologic elements and the topogaphic elements. Also, the spring zone In Cheju Island are classified Into three types that the mountain area, the muddle area, the coastal area in spring distribution by attitude. The quentity of spring and variability show subvariety on the average according to Meinzer's classilfication and the whole basin of spring shows various distributions from Third to Sixth. The results of this study can be utilized to evaluate the condition of groundwater development In Cheju Island.

• Journal of Ecology and Environment
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• 제38권2호
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• pp.229-239
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• 2015

The southwestern islands of Japan, especially southward from Amamioshima Island, have distinguished sets of nature and culture. However, various problems are arising on those islands. This report first introduces island characteristics as well as, their status briefly. Then it introduces conservation efforts. Since nature and culture are closely connected in the island system, conservation of the set of nature and culture is essentially important. From this point of view, this report focuses on two efforts. The first example is the effort for designation of a new national park with a new concept of "environmental culture type" and "ecosystem management type" in the Amami Gunto Islands. This effort is a new challenge to focus on the importance of cultural aspects. The second example is the unique effort of the national park visitor center to conserve as one set of integrated nature and culture with an alliance of all stakeholders in Taketomijima Island, Iriomote-Ishigaki National Park. The visitor center serves not only visitors, but also islanders. These two cases are good models that suggest hints for future conservation measures.

• 한국대기환경학회지
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• 제7권1호
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• pp.49-53
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• 1991

Relations of urban heat island and air pollution are analyzed by using $SO_2$ concentration data (winter season in 1985) from 10 sites of Seoul area and differences of wind speed and air temperature in urban and rural area. Urban heat island is developed when daily mean wind speed at urban site is lower than 1.5m/sec or in the interval of 3.0 $\sim$ 3.5m/sec. When differences between urban and rural air temperature is greater than the overall average of those differences, $SO_2$ concentrations of those above-average differences are 1.3 $\sim$ 1.8 times higher than those of below-average differences. The trends are shown obviously at north-eastern area of Seoul (Gilum Dong, Ssangmun Dong, Myeonmog Dong). When intensity of Urban Heat Island is weak, $SO_2$ concentration was reduced in propotion to a rise of wind speed. But $SO_2$ concentration is on the partial increase in spite of a rise of wind speed when intensity of urban heat island is strong.

• Bulletin of the Korean Chemical Society
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• 제26권1호
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• pp.127-130
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• 2005

The early stage of the self assembly for octadecyltrichlorosilane (OTS)-based monolayers is investigated using atomic force microscopy (AFM). Height measurements using AFM prove that the island height of the monolayers gradually increases with increasing the island size, and is close to the limiting value (h = $\sim$25 $\AA$) after d = $\sim$600 nm in size. Since the theoretical length of a covalently bound OTS molecule is 26.2 Å, the limiting value of the island height means that the islands with d ${\geq}$ 600 nm consist of close-packed, fully extended chains. The heights for the islands with d < 600 nm are lower than the limiting value and decrease with decreasing the island sizes. This observation indicates that the OTS molecules in the small islands are less densely packed, and that the packing densities of the islands increase as the islands grow in size.

• 한국패류학회지
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• 제20권2호
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• pp.135-140
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• 2004

Twenty five marine molluscan species were added to the malacofuana of Dokdo Island, Korea based on the samples collected from inter- and subtidal rocky shore of the island on April and November 2004. As a result, seventy five marine molluscan spacies were recorded from Dokdo Island hitherto.

• 한국산업융합학회 논문집
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• 제12권3호
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• pp.157-162
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• 2009

Significant air temperature increases in urban areas are known as the heat island phenomenon in a global scale. Therefore, we use numerical model in order to analyze quantitative effects by using new & renewable energy on the heat island phenomenon in urban area. The present study quantitatively analyzes the Urban Heat Island Effects, Energy-Saving Effects, and Environmental Load Decrease Effect along New and Renewable Energy Application which is 10% of the Building Energy Consumption.

• 한국해양학회지
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• 제19권1호
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• pp.18-23
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• 1984

타원형 섬에 의한 조석파의 산란 이론에 근거하여, 제주도 주변의 M$_{2}$ 반일주조 조석을 구명하였다. 제주도를 수심이 일정한 해양 가운데 놓여있는 타원형의 섬으로 근사화한 후, 입사파와 산란파의 진폭을 연안 경계조건와 7개 검조소의 조화상수에 대한 최소자승법을 통하여 결정하였다. 이와 같은 이론식에 근거하여 제주도 주변M$_{2}$조에 대한 조석도를 해석적으로 작성하였다.