• Journal of the Korean Ceramic Society
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• v.23 no.4
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• pp.17-22
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• 1986

$\beta$-Sialon powders were prepared by the reduction-nitridation reaction from the mixture of Wando-pyrophyllite and graphite at 135$0^{\circ}C$ in $N_2-H_2$ atmosphere. The $\beta$-Sialon powders were sintered at 175$0^{\circ}C$ by the pressureless sintering for 90min and the hot-pressing for 60 min respectively. All the sintered bodies showed their relative densities higher than 94% The values of M.O.R fracture toughness(KIC) and hardness showed 32.9kpsi 2.9MN/$m^{1.5}$ , 12.1GN/$m^2$ for the pressure-less sitnered bodies and 48.6kpsi, 4.6 MN/4m^{1.5}$ 15.3GN/$m^2$ for the hot-pressed bodies respectively.

• Journal of the Korean Society of Marine Environment & Safety
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• v.7 no.3
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• pp.41-59
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• 2001

Recently, as the coastal trading is being increased rapidly, risk of collision being increased especially in the coastal route near around the port of Wando. In this paper, with the reference to various literatures and papers on collision avoidance rules, the navigational rules and regulations for the coastal area-especially for the narrow channel-are construed and introduced in brief. Also, 3 collision cases near around the port of Wando and statistical data during 5 years(1996 to 2000) are studied. The results of this study are as follows; 1. It is strongly recommended to separate the route of east-bound and west-bound in this area due to removing the risk of collision between the vessels in reciprocal way. 2. The owner of the fleet should lead that the master should con the vessel by himself when passing this area. 3. For the introduction of the Coastal VTS, it is required to investigate the capability to cooperate with military radar sites which based on all over the coast.

• Korean Journal Plant Pathology
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• v.10 no.1
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• pp.68-72
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• 1994

Bacterial canker of kiwifruit recently outbroke throughout the southcoast of Korea, the major production areas of kiwifruit. Some orchards were destroyed because of severe damage by the epidemics of the bacterial canker, especially in Jeju-si and Bukjeju-kun, Jeju and Goheung-kun and Wando-kun, Chonnam. The bacterial canker, which has been occurred in Jeju from the mid 1980s, was first observed in Haenam-kun, Chonnam in 1991. The disease outbroken throughout the southcoast of Korea caused extremely severe damages and the diseased areas are increasing continuously. The possibility that the bacterial canker was introduced from Japan into Jeju is high, although the path of the epidemic is still not clear. And then the bacterial canker may spread from Jeju to Haenam and/or Wando, from which the disease may spread to the southcoast of Chonnam and the westcoast of Kyungnam in Korea.

• Journal of Ecology and Environment
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• v.43 no.1
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• pp.9-13
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• 2019

We investigated the pollinators of Centipede's foot orchid (Cleisostoma scolopendrifolium) at five locations in southern Korea. Only one species of megachilid bee (Megachile yasumatsui) was observed at three of the sites (Mokpo, Haenam, and Wando). We assumed that the megachilid bee worked as a sole pollinator of C. scolopendrifolium based on the visiting behavior of the bees the attached pollinia. Fruits were observed at the three locations that bees visited: 74% fruit set at Mokpo, 59% at Wando, and 31% at Haenam. By contrast, at two of the locations where megachilid bees did not visit the plants (Naju and Jindo), there were no fruits set. The differences in fruit set rates at the three orchid populations where bees were observed appear to be related to bee abundance and flower visitation rate rather than to differences in flower abundance. The pollination interaction between C. scolopendrifolium and megachilid bees appears to involve sexual deception since only male bees were attracted to the flowers. The underlying mechanism involved in this interaction needs investigation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.17-18
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• 2019

해상교통관제 업무의 최적화를 위하여 요구되는 인적요소 분야 중 관제사의 상황인식(SA: Situation Awareness)와 관제 업무부하(Workload)와의 관계성을 확인하는 것이 해상교통 분야에서는 중요한 실정이다. 이 연구에서는 관제사의 상황인식과 업무부하를 상황인식평가기술(SART)과 다차원 작업부하 지표(NASA-TLX)를 실제적으로 측정하고, 측정 결과를 비교함으로서 개념들에 대한 이해와 시스템적으로 관리할 수 있는 방법을 제시함으로써 해상교통관제사 전문성 제고방안에 기여하고자 한다.

• Proceedings of the Korean Society of Environment and Ecology Conference
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• 2003.10a
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• pp.155-157
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• 2003

• Economic and Environmental Geology
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• v.27 no.2
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• pp.181-190
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• 1994

Petrochemical study on the micrographic granite distributed in the Wando area, the southernmost part of the Yeongdong-Kwangju depression is performed to investigate the petrogenesis and differentiation processes of the granitic magma. Polarized light microscopy for modal analyses, electron probe microanalyses of feldspars and biotite, inductively coupled plasma analyses for major and trace element contents were adopted in the study. The lithology of the study area consists of Precambrian metasediments, Mesozoic volcanic and sedimentary rocks, and micrographic granite which intrude into the former. The micrographic granite in the Wando area are distributed in the shape of a cauldron. Modal and nonnative mineral analyses of the micrographic granite fall in the area of granite and granodiorite. The chemical composition indicates that the micrographic granite is I-type and magnetite series. The micrographic granite is characterized by more than 90% of micrographic texture in volume percent. Feldspars in the micrographic granite is alkali feldspars (Or, 45~93) and plagioclases (albite to oligoclase). The biotite has a intermediate composition between phlogopite and annite solid solution. The results of the petrochemical studies indicate that the granitic magma of calc-alkaline source materials reactivated in a compressional environment at the continental margin, and then was differentiated by fractional crystallization. The micrographic granite intruded into a shallow level of the crust (5~7 km) in the late Cretaceous.

• Journal of Environmental Science International
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• v.16 no.9
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• pp.1011-1018
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• 2007

This study was conducted to analysis the ecological characteristics of "Wando HolIy"$(llex{\times}wandoensis)$ which is expecting as a possible ornamental tree with its beautiful leaves, flowers and fruits, and to find special breeding material which have particular characteristics and also provide correct environmental information which are required for commercial cultivation. The hill of Galmoon-Ri, Gunoei-Myon, Jeonnam Province, Korea, were reported as a original habitat of native $llex{\times}wandoensis$. The investigation shows that soil pH of native habitat was 6.18, hardness was 2.39, humidity was 38.6%, direction of slope is SSW, and average inclination was $15^{\circ}. The vegetation around $I.{\times}wandoensis$ is occupied by trees like an Quercus variabilis, Q. serrata, Q. acuta and so on. These are mixed forest of deciduous trees. Tree height reached up to about 12m and its coverage is about 30%. Q. salicina, Camellia japonica, I. integra, Cryptomeria japonica account for sub-tree layer. Tree height is around 8m and coverage is about 20%. Shrub layer was taken by Viburnum furcatum, Callicarpa japonica, Styrax japonica, Eurya japonica, Lindera obtusiloba, Ligustrum japonicum, Smilax china, Cornus walteri etc. Tree height reaches around l.2m and coverage is around 20%. Herb layer includes Trachelospermum asiaticum var. intermedium, Cymbidium goeringii, Dryopteris bissetiana, Disporum viridescens, Disporum smilacinum, Sasa borealis var. gracilis etc. Trachelospermum asiaticum var. intermedium, which are observed in southern evergreen zone, are dominant and its coverage is around 20%. The native habitat was in spoiled condition because of artificial thin out.

• Journal of Environmental Science International
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• v.17 no.9
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• pp.949-956
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• 2008

The data of temperature, chlorophyll a, phytoplankton and NOAA/AVHRR satellite data were analyzed about 7 stations around Wando Island area on August 30, 2005. The sea water temperature range was from $15.19^{\circ}C$ to $24.97^{\circ}C$, and there was a cold water mass from the station 1 to 5 around the outside of Chungsando Island, the water temperature was lower at the bottom than surface. The salinity was $32.41{\sim}34.03$, DO was $7.40{\sim}9.14mg/L$, but the concentration of chlorophyll a was 1ug/L higher at the bottom than surface. Total phytoplankton appeared from the whole stations were 47 genus, 80 species and diatoms were dominant. A lot of dinoflagellates Ceratium forca and diatoms Thalassithrix spp. mostly appeared in the cold water mass were turned up from the station 1 to 5. 4 groups of phytoplankton clusters were shown in the surface, and 3 groups of phytoplankton clusters were shown at the bottom according to the water temperature. On the ground of the result analyzed with NOAA/AVHRR satellite data, the SST around Wando Island was $22{\sim}25^{\circ}C$, it was formed by thermohaline front latitudinally

• Journal of the Korean Geographical Society
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• v.44 no.4
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• pp.544-556
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• 2009

The purpose of this study is to examine the determinant factors of satisfaction and to investigate the difference from clusters in the category of overall state of satisfaction, the thought of revisiting, and the intention of recommendation with the case of Wando Changpogo Festival. Changpogo Festival has been held since 1996 with the theme of 'Changpogo', gained great acknowledgment from television drama, 'Haeshin', and this year of 2009 is its fourteenth. The study analyzed questionnaire which is made up of items on satisfaction factors of 18 local festival visitors. Results from factor analysis are 1) the contents and the souvenir of the festival, 2) work for publicity, 3) tour for near place and convenient facilities. Likewise, results from cluster analysis are 1) a cluster of the contents and the souvenir of the festival, 2) a cluster of tour for near place and convenient facilities, 3) a cluster of work for publicity. In conclusion, there are similar degrees in difference between clusters, but especially the 'tour for near place and convenient facilities' factor has higher score than the others. Therefore, this factor should be cared with great importance.