• Proceedings of KOSOMES biannual meeting
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• 2006.11a
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• pp.1-8
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• 2006

국민소득 증대와 주 5일 근무제 시행으로 육상레저관광에서 해양레저관광으로 그 추이가 이동되고 있다. 해양레저를 즐기고자하는 수요는 증가하고 있으나, 기반시설 부족으로 활성화가 이루어지지 못하고 있는 실정이다. 특히 우리나라 서남해안 해역은 2,000 여개의 다도해가 자연방파제 역할을 하고 있으므로 해양레저 산업을 활성화 시키는데 적합한 천혜의 자연조건을 보유하고 있다. 본 연구에서는 우리나라 해양레저 기반시설의 현황과 문제점을 분석하고, 서남해안 해양레저 산업 활성화에 필요한 친환경 마리나 시설 구축에 관한 자연조건, 해상조건 분석, 다목적용 마리나 시설에 관하여 논한다.

• Journal of Korea Foundry Society
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• v.26 no.3
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• pp.123-128
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• 2006

Mechanical and thermal properties of spray-cast hypereutectic Al-20wt.%Si-xwt.%Fe alloys (x=0, 1, 3, 5) were investigated. After the spray-casting, hot extrusion was performed at $400^{\circ}C$. Intermetallic compound (${\beta}-Al_5FeSi$) and primary Si are observed in the spray-cast aluminum alloys. The size of primary Si and intermetallic compound of the spray-aluminum alloys became finer and more uniformly distributed than that of the permanent mold cast ones. Ultimate tensile strength of the spray-cast aluminum alloys increased by increasing Fe contents, but that of the permanent mold cast aluminum alloys decreased by increasing Fe contents possibly due to increased amount of coarse intermatallic compound. The coefficient of thermal expansion (CTEs) of the aluminum alloys became lower with finer primary Si and intermetallic compound, and this is attributed to the increased amount of interfacial area between the aluminum matrix and the phases of finer Si and intermetallic compound.

• International Journal of Industrial Entomology and Biomaterials
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• v.17 no.2
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• pp.169-172
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• 2008

Indian tropical tasar silkworm, Antheraea mylitta D is reported to have forty four ecoraces by way of their adoption to different topographical and vegetational conditions. Of late, another ecorace 'JATA' - univoltine under in-situ condition has been explored which is localized in Thakurmunda area of the foot hills of Simlipal biosphere (Mayurbhanj district) of Orissa, India. The ecorace 'Jata' exhibits superior economic characters over widely commercialized ecoraces of Daba and Sukinda. The cocoon production of localized 'Jata' ecorace is depleting day by day in in-situ condition. In the present study, efforts were made to stabilize the ecorace 'Jata' under ex-situ condition at Ranchi (Jharkhand), where the 'Jata' ecorace silkworms were reared on Terminalia tomentosa for four successive generations during 2006 and 2007 and the cocoons were preserved in grainage house under prevailing climatic conditions. The results indicated change in voltinism behaviour of the 'Jata' ecorace from univoltine to bivoltine. The rearing performance and grainage efficiencies indicate the tendency of 'Jata' ecorace towards acclimatization and stabilization under Ranchi climatic conditions. The 'Jata' ecorace manifests the prospects for acclimatization, stabilization and commercial exploitation.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• v.29 no.1
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• pp.223-227
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• 2005

In adjacent sea areas of Yeosu, there are many crossing traffics between eastbound and westbound vessels. Traffic congestion is increasing in sea area of east Sori island and near Yokji Island. In this research, we established TSS near Yeokmando Areas and new recommended route which connected to Seopdo west recommended route to reduce meeting traffic between eastbound vessels and westbound vessels.

• Proceedings of the Korean Geotechical Society Conference
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• 2004.03b
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• pp.839-846
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• 2004

The objective of this study is the evaluation of the tunneling effect on the groundwater-surface water interaction. The designed tunnel line is laid beneath the Gapo-cheon, which runs throughout study area. And, the pre-evaluation of the tunnel-influence on the Gapo-cheon is urgently needed. However, it is very difficult to find out the similar domestic and/or foreign cases. In this study, we would exclude the numerical modeling technique with insufficient data. Instead of the evaluation of the tunneling effect on the groundwater-surface water interaction with the numerical modeling, we monitored the flow rate of surface water at various point. We measured the flow rate of surface water at 5 points. With the results of surface flow, we can conclude that 39% of flow rate in Gapo-cheon is contributed by the groundwater discharge, as baseflow.

• Atmosphere
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• v.24 no.1
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• pp.77-87
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• 2014

The radar reflectivity is significantly affected by ground clutter, beam blockage, anomalous propagation (AP), birds, insects, chaff, etc. The quality of radar reflectivity is very important in quantitative precipitation estimation. Therefore, Weather Radar Center (WRC) of Korea Meteorological Administration (KMA) employed two quality control algorithms: 1) Open Radar Product Generator (ORPG) and 2) fuzzy quality control algorithm to improve quality of radar reflectivity. In this study, an occurrence of AP echoes and the performance of both quality control algorithms are investigated. Consequently, AP echoes frequently occur during the spring and fall seasons. Moreover, while the ORPG QC algorithm has the merit of removing non-precipitation echoes, such as AP echoes, it also removes weak rain echoes and snow echoes. In contrast, the fuzzy QC algorithm has the advantage of preserving snow echoes and weak rain echoes, but it eliminates the partial area of the contaminated echo, including the AP echoes.

• Journal of Korea Multimedia Society
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• v.18 no.12
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• pp.1445-1452
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• 2015

In these days, fluorescent materials such as ICG or 5-ALA is used for the brain surgery. The patients who underwent brain tumor surgery has been increased during last 30 years and the survivorship rate increased 22∼33% in 5 years. Recently, the Fluorescence induction surgery is developed for more safety and improved the resection rate for the glioma in the neurosurgery field. In this study, we proposed fluorescence area detection method for ICG and 5-ALA fluorescence induced surgery using acquired images from image processing. Accuracy was 99.21% from ICG images, and 99.51% from 5-ALA images. Matthews correlation coefficient was 88.67% from ICG images, and 90.49% from 5-ALA images.

• The Plant Pathology Journal
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• v.19 no.6
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• pp.294-300
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• 2003

Bacterial strains were isolated from diseased samples of shoot blight collected from different pear growing orchards of Chuncheon, Korea from 1995 to 1998. Forty-nine strains showed their pathogenicity on immature fruit and shoot of pear. Microbiological, physiological, and biochemical tests were performed on these pathogenic strains. One strain, designated as WT3 in this study, was selected as a representative strain as it was collected from the first outbreak area in Jichonri, Chuncheon in 1995. Further detailed characterization of the strain WT3 was done by PCR amplification using specific primers described previously for distinguishing Erwinia pyrifoliae from its close pathogen Erwinia amylovora. Based on phenotypical, biochemical, and molecular analyses, strain WT3 was identified as a shoot blight pathogen which was the same as E. pyrifoliae Ep16 previously described by a German group in 1999.

• Journal of the Korean Society of Fisheries and Ocean Technology
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• v.50 no.2
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• pp.124-130
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• 2014

We aimed to assess the behavior characteristics of fish on an artificial reef using hydroacoustic techniques. The acoustical survey was conducted with a 200 kHz dual beam transducer while fishing on the stone combination reef of Uljin. A school of fish were detected on the artificial reef before sunset and floated on the artificial reef at 30 minutes after sunset. The density (Nautical Area Scattering Coefficient, NASC) of fish that floated on the artificial reef after sunset was about $600m^2/nmi^2$; similar observations (about $50m^2/nmi^2$ or less) were noted after 19:00 hours. Fish caught by fishing on the artificial reef were Sebastes schlegeli, Hexagrammos otakii, Sebastes thompsoni, and Conger myriaster. Resultantly, we demonstrated that hydroacoustic techniques are useful for detecting behavior characteristics of fish in the artificial reef. Such results can be used for basic data to estimate the install effect of the artificial reefs.

• International Journal of Precision Engineering and Manufacturing
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• v.9 no.4
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• pp.79-82
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• 2008

A method is described for ideally reconstructing the profile from a surface profiling measurement containing a reasonable amount of null measurement data. The proposed method can conjecture lost information and rectify irregular data that result due to bad measuring environments, signal transmission noise, or instrument-induced errors, The method adopts the concept of computer graphics and consists of several processing steps. First, a search for valid data in the neighborhood of the null data is performed. The valid data are then grouped and their contours are extracted. By analyzing these contours, a bounding box can be obtained and the general distribution of the entire area encompassing the valid and null data is determined Finally, an ideal surface model is overlaid onto the measurement results based on the bounding box, generating a complete reconstruction of the calculations, A surface-profiling task on a liquid crystal display photo spacer is used to verify the proposed method. The results are compared to those obtained through the use of a scanning electron microscope to demonstrate the accuracy of the proposed method.