MIKE21을 이용한 제주외항 해역에서의 폭풍해일고 산정

윤종태,방교진 경성대학교 공학기술연구소 2008 공학기술연구지 Vol.15 No.-

It is essntial to accurately estimate the transformations and behavior of waves for the design of safe and effective coastal structures Occurring frequency of strong typhoons is increasing because of global warming and it forces to consider the influence of storm surge before the construction of coastal structures Numerical experiment is performed to estimate the variation of storm surge in Jeju outport The applicability of MIKE21 HD module to the sea around Jeju is verified by comparing the simulated results with observed data and the variation of storm surge due to the quay construction of Jeiu outport is examined. Data of typhoons which passed or had signficant damages to the sea around JejU outport during last 30 years are collected and analyzed, and finally typhoon RUSA in 2002 and typhoon MAEMI in 2003 are selected as simulation typhoon. Simulated maximum surge heights are compared with observed data and they showed good agreements After the construction of quay wall, the surge heights at harbor inlet and interior area became smaller than before the construction, but the differences are so small to be neglected.

五臺山演習林의 植物群集에 關한 硏究(Ⅰ) : 種組成 및 多樣性 Species Composition and Diversity

尹相旭,金昌浩,朴敎秀 동국대학교 생명자원과학대학 연습림 1993 연습림논문집 Vol.- No.3

This study was to provide the fundamental data for efficient reservation and management of the Mt. Odae experiment forest of Dongguk University. Obtained results are as follows : 1. As results of simple discriminant analysis, contents of silt and sand showed the most high contribution percent to the discriminant between each physiographic location, ridge and glen parts, steep and slow slopes, and high and low elevation, and among those locations steep slopes were the poorest soil condition. 2. By the community differential table the plant communities of this area are classified by Quercus mongolica―Acer pseudo―Sieboldianum―Rhododendron schlippenbachii community, Carpinus laxiflora―Styrax obassia―Lindera obtusiloba community, Pinus densiflora―Quercus serrata―Lespedeza spp. community, and 3 species groups that mainly appear in ridge part, glen part, and high elevation area, respectively. 3. Quercus mongolica showed the high importance value in ridge part, steep slopes, high elevation area, Carpinus laxiflora n glen part, and Pinus densiflora in low elevation area. 4. Glen part had more rich species than ridge part, and slow slopes was the area where had the the rich species among all the physiographic location. 5. As species diversity(H´) and evenness(J´) were the most high value in slow slopes and the most low one in ridge parts, it were closely related to the degree of inclination of slope, and dominance(1­J´) were the high value in glen parts.

광굴절 매질을 이용한 칼라 패턴분류 시스템의 구현

윤진선,김남,전용성,정교일 충북대학교 컴퓨터정보통신 연구소 2000 컴퓨터정보통신연구 Vol.8 No.2

본 논문은 광굴절 매질(LiNbO3)을 이용한 칼라 패턴분류에 관한 연구이다. 광굴절 매질을 이용하여 모양 정보 뿐만 아니라 칼라 정보도 분류하는 시스템을 구현하였다. 칼라 패턴분류 시스템의 특성 실험으로서, 자기 상관 및 상호 상관 특성 실험을 수행하여 상관 세기를 비교 측정함으로써, 광굴절 매질을 이용하여 기록된 복소 공간 필터의 유사 판별 능력을 실험하였다. 광학 실험에서 렌즈의 초점거리는 250mm, He-Ne 레이저의 참조광의 각도는 11° , Ar 레이저의 참조광의 각도는 7°를 사용하여, R에 대한 상관결과는 원점으로부터 47.7mm. G에 대한 상관결과는 원점으로부터 30.5mm에서 각각 얻을 수 있었다. In this paper, the color pattern classification technique using a photorefractive material(LiNbO3) is proposed. The optical implementation to classify the shape and color distributions is realized. The discrimination capability of the color pattern classification system is examined against the similar patterns in the optical experiment for auto-correlation and cross-correlation tests. The correlation peak of red light is obtained at coordinates (47.7, 0) and the correlation peak of green light is acquired at coordinates (30.5, 0), when the focal length of the lens is 250mm, the reference waves of He-Ne laser and Ar laser are introduced at 11° and 7° respectively.

Benign Partial Epilepsy with Occipital Paroxysm 1례

윤석중,이영혁,김교순 건국대학교 의과학연구소 1994 건국의과학학술지 Vol.4 No.-

Benign epilepsy of childhood with occipital paroxysm is characterized by seizures which include visual symptoms followed by motor manifestations. The EEG is also characterized by repetitive occipital discharges of spikes, sharp waves or spike-wave complexes appearing only after eye closure. No occipital lesions have been found, the children are neurologically normal. Recently we experienced a case of benign epilepsy of childhood with occipital paroxysm which showed favorable response to anticonvulsant treatment. A brief review of related literatures is included in this report

대학생들의 지방 섭취 형태와 에너지 균형 및 활동도에 관한 연구

윤교희 한국식품영양학회 1998 韓國食品營養學會誌 Vol.11 No.6

The purpose of this study was to investigate selected nutrient intakes, dietary atherogenesity, energy balance and activity level of college students. One hundred and thirty one students (61 males and 70 females) made their three-day dietary records and one-day activity records along with one-day dietary records. BMI of the surveyed students was 22.33 for males and 20.28 for females. Average calorie intakes of male and female students was respectively 2166.20㎉ and 1793.60㎉. Females had slightly higher fiber intakes than males in terms of fiber g/1000㎉. Carbohyrate, protein and fat ratios in energy composition of males and females were respectively 56.62 : 15.33 : 24.70 and 57.64 : 16.49 : 25.79. Average cholesterol intakes of male and female students were 295.66㎎ and 259㎎ respectively. The male showed higher saturated fat intake, and had higher atherogenic indices of diets such as cholesterol index(CI) and cholesterol-saturated fat index(CSI) than the female. Males spent an average of 1039.00㎉/day compared to females of 687.93㎉/day for all physical activities. Most students participated in light(100% of males and females) and moderate(33% of males and 3% of females) activities level. Few students spent time at severe and very severe activity level. Seventeen of the 131 students were in positive energy balance whereas 83% were in negative balance. Both genders with positive energy balance tended towards smaller weight and BMI, and larger food intakes than those with negative energy balance. Students with positive energy balance had higher saturated fat intakes and dietary atherogenic scores of CI and CSI than the counterparts with negative energy balance. Males with positive energy balance had decreased physical activity and daily energy expenditure whereas increased food and saturated fat intakes. Females with positive energy balance had significantly increased food, saturated fat and sugar intakes.

진공포장한 한우와 홀스타인 도체 B₂및 D등급 냉장육의 품질특성

이교연,문윤희 慶星大學校 1998 論文集 Vol.19 No.2

This study was conducted to investigate the quality characteristics of vacuum-packaged and chilled beef. Four kinds of beef prepared from carcass grade B2, D of Korean native cow and Holstein. The physicochemical characteristics and palatability of beef loins were compared on the 30th day chilled with vacuum-package. The pH of Korean native beef B2, D grade on the 30th day chilled with vacuum-package were 5.74 and 5.92, Hostein beef B2, D grade were 5.71 and 5.83 by Korean native beef. D grade was highest. the lactic acid contents of Korean native beef B2, D grade were 295.30 and 290.63, Holstein beef B2, D grade were 307.33 and 369.02㎎/100g by Holstein beef D grade was highest. The hardness of Korean native beef B2, D grade on the 30th day chilled with vacuum-package were 109.12 and 165.42, Holstein beef B2, D grade were 105.27 and 167.15㎏/㎠ by Holstein beef B2 grade was lowest, and chewiness of Korean native beef B2, D grade on the 30th day chilled with vacuum-package were 187.11 and 213.62, Holstein beef B2, D grade were 111.38 and 207.62g by Holstein beef B2 grade was lowest, and myofibilar fragmentation index(MFI) were 68.27 and 65.27, Holstein beef B2, D grade were 77.47 and 69.40 by Hosstein beef B2 grade was highest. The inosine(Hx) of Korean native beef B2 D grade on the 30th day chilled with vacuum-package were 58.37% and 55.47%, Holstein beef B2, D grade 54.75% and 52.26% by Korean native beef B2 grade was highest, and those were increased compared on the 2nd day after slaughtering. the monounsaturated fatty acid(MUFA)/saturated fatty acid(SFA) ratios of Korean native beef were 1.48 and 1.32, Holstein beef 1.44 and 1.41 by Korean native beef B2 grade was highest, and B2 carcass grade were higher than D carcass grade. The cooking loss and cooking shortening ratios of Korean native beef B2, D grade on the 30th day chilled with vacuum-package were 15.41%, 14.70% and 19.51%, 26.61%, Holstein beef B2, D grade were 15.63%, 15.27% and 18.59%, 33.20% by Korean native beef B2 grade was lowest. The texture and palatability of cooked meat of on the 30th day chilled with vacuum-package were good in order Korean native beef B2 grade, Holstein beef B2 grade, Korean native beef D grade, and Hostein beef D grade.

1-Bromoacetylpyrene 誘導體化劑를 利用한 Carboxyl基 含有成分의 分析에 관한 硏究(Ⅰ) : 高級不飽和脂肪酸의 HPLC에 依한 定量 Determination of Unsaturated Fatty Acids by HPLC

李允中,曺正吉,朴元敎,李康春 成均館大學校 科學技術硏究所 1988 論文集 Vol.39 No.1

A simple and highly sensitive method for the determination of unsaturated fatty acids (C_16:1, C_20:4, C_20:5) is described. I-Bromoacetylpyrene was used as the pre-column fluorescent labelling reagent for HPLC. Fatty acids were derivatized quantitatively into fluorescent compounds by treating with 1-bromoacetylpyrene in the presence of 18-crown- 6 in acetonitrile. The optimum conditions for the derivatization such as, concentrations of KOH, 18-crown-6, and 1-bromoacetylpyrene, reaction temperature and reaction time, were investigated. The derivatives were separated on a reversed phase column (LiChrosorb RP-8, 5 ㎛) using the tertiary mixture of acetonitrile, methanol, and water as the mobile phase. The effluent was monitored by fluorometer (excitation wavelength; 366 nm, emission wavelength; 454 nm). Linearities of calibration curve were obtained between 5.0 p mol and 40.0 p mol. The detection limit of fatty acids was 1 p mol in a 20μl of injection volume.

Acrylonitrile 모노머를 함유한 UP 결합재의 개발

안교진,윤성길 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

불포화 폴리에스테르(UP) 수지의 기계적 강도 등 물성을 개선하기 위하여, 본 연구에서는 모노머로서 스티렌과 함께 아크릴로니트릴(AN)을 사용하였다. UP 수지 중에서 총 모노머의 함량은 50 wt.%이며, 모노머 중에서 AN의 함량은 0~3wt.%로 변화하였다. 이와 같은 수지 조성물에 석재 분쇄물을 총중량에 대하여 70% 첨가하여 석재복합체를 제조한 후 압축강도 및 휨강도 등 물성을 측정하였다. DSC를 이용하여 중합과정에서의 반응속도와 전환율을 측정하였다. 만능시험기를 이용하여 인장 및 굴곡 실험을 실시하였다. AN의 첨가에 의해 인장강도는 62.8%, 굴곡강도는 24.8% 증대되었다. DMA를 사용하여 수지의 점탄성을 측정하였다. UP 수지의 석재 복합체의 경우 AN의 첨가에 의해 압축강도는 7%, 굴곡강도는 6% 증가되었으며, AN의 함량이 20%인 경우 가장 좋은 물성을 나타내었으며, AN의 함량이 30%이상인 경우는 물성이 저하되는 경향을 나타내었다. Linear Shrinkage method 따라 수축률을 측정하였다. AN의 함량이 증대될수록 수축률이 감소하여 양호한 물성을 나타내었다. 시료의 파단면을 SEM으로 관찰한 결과 AN의 함량이 증대됨에 따라 절단면의 표면이 거칠게 나타났다. 따라서 AN의 첨가에 의해 시료의 강인도가 증대됨을 확인하였다. In order to improve mechanical properties of unsaturated polyester(UP) resins, acrylonitrile was used as a monomer together with styrene. The contents of monomer of UP resins is 50wt.%, and the contents of acrylonitrile in the monomer was changed as 0~30wt.%. Mechanical properties of the composite materials containing aggregates by 70wt% was measured by a universal tensile machine. Reaction rate and conversion of UP resins were tested by DSC measurement, and the thermo-mechanical properties of UP resins were measured by DMA. Tensile and flexural strength increased by 62.8% and 24.8% by increasing the acrylonitrile ratio in the monomers, respectively. Tensile and flexural strength of the composites increased as 7% and 6% by adding acrylonitrile as a comonomer. The composite containing 20 wt% acrylonitrile in monomer showed relatively good properties, while mechanical properties of the composites containing 30 wt% acrylonitrile become worse. DMA results showed the improved thermo-mechanical properties by the use of acrylonitrile as a co-monomers. Volume shrinkage of the cured resin measured by linear shrinkage method was slightly improved by the use of acrylonitrile in the monomers. SEM photographs of the cured UP resins prepared by acrylonitrile as a co-monomer showed crude fracture surface morphology, that might be related with the high toughness properties of the resins.

광자 크리스탈 광 분배기의 수치 연산 해석

鄭敎龐,尹志秀 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-

We design a 1-by-4 optical splitter made of photonic crystal waveguides and analyze the properties of the optical splitter using the finite-difference time-domain method with perfectly-matched-layer absorbing boundaries. The photonic crystal is constructed by cylindrical rods in air on a square lattice. Our simulation results show that there are different transmission properties for four bend geometries and different incident-wave frequencies, and the incident power splits in the four arms with almost the same ratio. Moreover, we perform numerical simulations of T-shaped waveguide branches to reduce the reflections at the T-branches in the splitter. The branching region is treated as a cavity that couples the input and output waveguides. The improvement of transmission is achieved by placing the defects of extra rods in the branching region.

한국·중국의 정원문화에 대한 역사적 고찰 : 정자를 중심으로 The Traditional Landscape Pavilion

서주환,김교윤,장원 경희대학교 부설 디자인연구원 1998 예술· 디자인학연구 Vol.1 No.1

The study is literatured investigation on the traditional Landscape Pavilion of China and Korea. The Pavilion of China and Korea developed in same type, so willing to find out the difference in this study. Although the purpose that human assimilates and enjoy nature is a same standard of oriental landscape architecture each countries have various distinction in style. These difference showed that each country has own history, social customs, culture, traditional landscape pavilion in these factors, and have a better understanding about the pavilion in the gardens of China an Korea.