Variation of Harbor Oscillations in Yeongil Bay

Min­Su Jeon,Joong­Woo Lee,Jae­Hyun Jeong,Sang­Yong Yang,Young­Hwan Jeong 한국항해항만학회 2006 한국항해항만학회 학술대회논문집 Vol.1 No.-

  Today, harbor oscillation problems are the most significant factor to consider when designing harbors serving very large ships. In coastal harbors, large vessels moored in the elastic hawsers are often displaced due to the resonance between long period waves and mooring systems. As a result, cargo handling may be interrupted and the hawsers may be broken, especially when the amplification becomes extreme. The most significant harbor confronted with harbor oscillation problem in Korea is Pohang New port. Many cases of problems are being reported by the pilot association and the local office of MOMAF (Ministry of Maritime Affairs and Fisheries). However, it is difficult to prevent the arrival of long waves causing oscillation within this harbor. Moreover, the Korean government has already started a new port plan at the mouth of Yeongil Bay without addressing the problems that have occurred in Pohang New port. This study deals with the variation of harbor oscillation due to the construction of a 4.1 km breakwater at the bay mouth including the arrangement of the new berths. Numerical methods used are in fairly standard form from the extended mile slope equation. The obtained numerical results were compared with field measurement from the previous and this will bring a certain level of discussion and consideration of variation to the future port development.

오죽잎차와 오죽죽순차의 성분 분석 및 항산화 효과

김상민 ( Sang Min Kim ),전제승 ( Je Seung Jeon ),강석우 ( Suk Woo Kang ),김우리 ( Woo Ri Kim ),이기덕 ( Ki Deok Lee ),엄병헌 ( Byung Hun Um ) 한국응용생명화학회(구 한국농화학회) 2012 Journal of Applied Biological Chemistry (J. Appl. Vol.55 No.2

Nutritional components of Ojuk leaf tea and Ojuk shoot tea prepared from the leaves and shoots of black bamboo (Phyllostachys nigra Munro) by tea manufacturing process were evaluated. In addition, the extraction yield of water soluble components from these teas in the general tea brewing condition (water extraction in 80oC for 10 min.) and the contents of polyphenol and flavonoid were compared with not only the dried raw materials, but also green tea and mate tea. Finally, offline and online scavenging activities against 2,2`-azino-bis(3-ethylbenzothiazoline- 6-sulphonic acid) (ABTS) and di(phenyl)-(2,4,6 trinitrophenyl)iminoazanium free radicals were investigated to evaluate the antioxidant activity and explore the components showing ABTS free radical scavenging activity from tea infusion. These results demonstrated that these teas from black bamboo contain various nutritional components and can be used as traditional tea beneficial to human health.

금불초 종(種) 및 개화시기에 따른 금불초 꽃 추출물의 항산화 효능

권순식 ( Soon Sik Kwon ),전소하 ( So Ha Jeon ),전지민 ( Ji Min Jeon ),천종우 ( Jong Woo Cheon ),박수남 ( Soo Nam Park ) 대한화장품학회 2013 대한화장품학회지 Vol.39 No.3

본 연구에서는 금불초(Inula britannica) 종(種) 및 개화시기에 따른 금불초 추출물의 항산화 효능을 알아보았다. 이들 추출물의 free radical 소거활성을 살펴본 결과, 만개한 금불초 꽃(I. britannica var. chinensis) 추출물의 경우 500 μg/mL의 농도에서 79.89%의 free radical 소거활성을 보였으나, 금불초 유사종인 가는 금불초(I. britannica var. linariaefolia Regel), 가지 금불초(I. britannica var. ramosa) 및 버들 금불초(I. salicina var. asiatica)의 꽃 추출물의 경우 free radical 소거활성이 거의 나타나지 않았다. 또한 꽃이 만개하였을 경우 꽃 추출물 분획에서는 93.62%의 free radical 소거활성을 보였으며, 봉우리 추출물 분획은 43.28%, 낙화추출물 분획은 14.11%를 나타냈다. 금불초의 종 및 개화시기를 선정 후, 추출용매, 온도, 시간을 조절하여 최적의 추출조건을 확립하였다. 그 결과, 65 ℃ 에탄올 추출물에서 가장 높은 DPPH free radical 소거활성이 나타났으며, 시간에 따른 유의적 차이는 없는 것으로 나타났다. 만개한 금불초 꽃 추출물에 대하여 rose-bengal로 증감된 사람 적혈구의 광용혈 실험에서 세포보호효과를 측정한 결과, 5 ~ 50 μg/mL의 범위에서 농도 의존적으로 세포 보호 효과를 나타내었다. 특히 50 μg/mL의 농도에서 τ50이 116.1 min으로 비교물질인 (+)-α-tocopherol에 비해 1.58배 더 큰 세포 보호활성이 있음을 알 수 있었다. HPLC로 금불초 꽃 추출물을 분석한 결과 flavonoid의 일종인 quercetin이 다량 함유되어 있는 것을 확인하였다. 이상의 결과들은, 65 ℃ 에탄올로 추출한 만개한 금불초 꽃 추출물의 경우 다량의 quercetin을 함유하며, 그로 인하여 free radical 소거활성 및 ROS에 대항하여 세포막을 효과적으로 보호함으로써 태양 자외선에 노출된 피부를 보호하는 항산화제로서 작용할 수 있을 것으로 사료되며, 기능성 화장품 원료로서 응용 가능성이 있음을 시사한다. In this study, antioxidative effects of the extracts of different species and flowering periods of Inula britannica were investigated. According to the free radical (1,1-diphenyl-2-picrylhydrazyl, DPPH) scavenging activity of the extracts, The I. britannica var. chinensis flower extract (500 μg/mL) was measured in a 79.89% free radical scavenging activity, but the flower extracts of similar species (I. britannica var. linariaefolia Regel, I. britannica var. ramosa, I. salicina var. asiatica) did not show any effect on the free radical scavenging activity. The effects of the free radical scavenging activity of I. britannica var. chinensis flower extracts were exhibited in the order of full bloom (93.68%), bud (43.28%), and fallen blossom (14.11%). Next, we established optimum condition of extract solvent, temperature, extraction time. The extract from ethanol at 60 ℃ showed the most free radical scavenging activity among other conditions and extraction time not relevant in free radical scavenging activity. The protective effects of the extract of I. britannica var. chinensis flower on the photohemolysis of human erythrocytes by using rose bengal were increased in a concentration-dependent manner (5 ∼ 50 μg/mL). In particular, the extract in 50 μg/mL concentration exhibited better protective activity (τ₅₀ = 116.1 min) than (+)-α-tocopherol (τ₅₀ = 73.44 min), which is a known lipophilic antioxidant. Principle component of I. britannica var. chinensis flower was identified as quercetin of flavonoids by high-performance liquid chromatography (HPLC). These results indicate that the extract of I. britannica var. chinensis flower can function as antioxidants in biological systems, particularly skin exposed to UV radiation by scavenging free radical and ¹O₂, and protect cellular membranes against ROS. It is concluded that the antioxidative effects of the extract of I. britannica var. chinensis flower could be applicable to functional cosmetics.

Casein micelle 의 조성에 관한 연구 : I. Micelle 크기 별에 따른 각 casein 의 구성비율 I. The relative amounts of individual caseins in the different casein micelles

김영교,신동철,전우민 한국낙농학회 1984 韓國酪農學會誌 Vol.6 No.1

本 實驗은 casein miceile의 크기에 따른 각종 casein의 構成成分을 究明하고자 超遠心分離機를 利用하여 casein micelle을 크기 別로 分類하고 DEAE-cellulose column chromatography를 이용하여 각 casein의 構成比率을 조사하였다. 그 結果를 要約하면 다음과 같다. 1. 脫脂乳를 100,000×g에서 각각 30分, 60分, 90分동안, 200,000×g에서 60分동안 遠心分離하였을 때 沈澱되는 casein micelle 量은 45.00%, 61.43%, 80.00% 및 95.00%였으며 沈澱되지 않는 serum casein量은 55.00%, 38.57%, 20.00% 및 5.00%였다. 2. 脫脂乳를 100,000×g에서 時間 差에 따라서 遠心分離하였을 때 각각 沈澱되는 casein micelle量은 10分間에는 全 casein量의 23.13%, 11∼30分間에는 30.26%, 31∼60分間에는 28.11%였으며, 60分問의 遠心分離에 의해서 沈澱되지 않는 serum casein은 17.79%였다. 3. 時問 差로 遠心分離하여 얻어진 casein micelle중 각 casein의 構成比率을 測定한 結果, α_s-casein, β-casein, κ-casein 및 γ-casein의 상대적인 量은 100,000×g, 10分의 pellet에서 각각 54%, 29%, 11% 및 6%였고, 100,000×g, 11∼30分의 pellet에서는 각각 54%, 28%, 13% 및 5%였고, 100,000×g, 31∼60分의 pellet에서는 각각 51%, 28%, 16% 및 5%로 나타났으며, serum casein은 44%, 29%, 19% 및 8%로 각각 나타났다. This experiment was carried out to study on the protein composition of casein micelles. Three micellar casein pellets and a serum casein were isolated at diferent time of ultracen trifugation. And the composition of individual caseins for the fractions was determined by DEAE-cellulose column chromatography. The results are summarized as follows: 1. When skimmilk was centrifuged for 30 min, 60 min and 90 min at 100,000g and for 60 min at 200,000g, the values for the sedimented casein micelles were 45.00%, 61.43%, 80.00% and 95.00% respectively and that of serum casein was 55.00%, 38.57%, 20.00% and 5.00% respectively. 2. When skimmilk was centrifuged for different time at 100,000g, the values for the sedimented casein micelles were 23.18% for 10 min.(pellet 1), 30.26% from 11 to 30 min.(pellet 2), 28.11% from 31 to 60 min.(pellet 3) and that of serum casein which was not sedimented at 60 min was 17.79% of the total casin. 3. The relative amounts of α_s-, β-, k- and γ-caseins in casein micelles obtained after different time of centrifugation were 54%, 29%, 11% and 8% in pellet 1, 54%, 28%, 13% and 5% in pellet 2, 51%, 28%, 16% and 5% in pellet 3,44%, 29%, 19% and 8% in serum casein respectively.

The Korean Association of lnternal Medicine : Poster Session ; PS 1357 : Nephrology ; Age is the Strongest Effector for the Relationship between Estimated Glomerular filtration Rate and Coronary Artery Calcifi cation in Apparently Healthy Korean Adults

( Hyun Beom Chae ),( Eun Jung Rhee ),( Hae Jung Park ),( Min Kyung Lee ),( Won Seon Jeon ),( Se Eun Park ),( Cheol Young Park ),( Won Young Lee ),( Ki Won Oh ),( Sung Woo Park ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1

Background: Cardiovascular disease (CVD) is a major clinical problem and the most common cause of morbidity and mortality in patients with chronic kidney disease (CKD). Coronary artery calcifi cation (CAC) is a potential mechanism that explains the association between renal function and cardiovascular mortality. We aimed to evaluate the association between renal function and CAC in apparently healthy Korean subjects. Methods: In 23,617 participants in the health screening program in Kangbuk Samsung Hospital health screening program from January 2010 to December 2011, estimated glomerular fi ltration rate (eGFR) was assessed by Cockcroft-Gault equation. Coronary artery calcium score (CACS) was measured by multi-detector computed tomography (MDCT). Subjects were divided into 3 groups according to the CKD Staging system with eGFR grade; stage 1: eGFR = 90 mL/min/1.73 m2, stage 2: eGFR 60-89 mL/ min/1.73 m2, stage 3: eGFR 30-59 mL/min/1.73 m2. Results: Mean age of the participants was 41.4 years, and mean eGFR was 103.6±21.7 mL/min/1.73 m2. Hypertension and diabetes were noted in 43.7% and 5.5% of the participants, respectively. eGFR showed weakly negative but signifi cant association with CACS in bivariate correlation analysis (r=-0.076, p<0.01). Mean CACS signifi cantly increased from CKD stage 1 to 3. The proportion of subjects who had CAC signifi cantly increased from CKD stage 1 to 3. Although odds ratio for CAC signifi cantly increased from stage 1 to 3 after adjustment for confounding factors, this signifi cance was inversed when age was included in the model. Age was the strongest factor that affects CAC. Conclusions: This study performed in young Korean subjects with relatively normal renal function, age was the mostly strongest effector on the association between eGFR and the degree of CAC.

지형학적 인자에 의한 달천수계의 계획홍수량산정

전민우 충북대학교 건설기술연구소 2011 충북대학교 건설기술연구소 논문집 Vol.30 No.2

-본문참고-

지형학적 인자에 의한 미호천수계의 유황분석

전민우,최동해,조용수 충북대학교 건설기술연구소 2002 建設技術論文集 Vol.21 No.2

The correlation equations were proposed to predict the flow duration of ungaged basin by regression analysis based on geomorphological factors. The proposed correlation equations give good results in consequence of application in Kagyung stream basin and Samki stream basin. Among the flow duration, the correlation coefficient of fruitful water discharge was the smallest value, on the hand, the correlation coefficient of reference low water flow was appeared to be the largest value. The correlation coefficient including only stream slope S as the independent variable was the smallest value, on the other hand, in the case of including basin area A and stream length L or A, L, S as the independent variable the correlation coefficient appeared to be the largest value and in this case, the two correlation coefficient were very close. These proposed correlation equations can be used to grasp the flow duration by acquiring the geomorphological factors of ungaged stream basin.

보호경찰관들의 탈북자 지원 경험 분석

전우택,윤덕용,민성길 大韓神經精神醫學會 2001 신경정신의학 Vol.40 No.2

본 연구는 남한에 들어와 살고 있는 탈북자들의 남한 사회 적응 지원 및 신변보호를 2년간 담당한 경찰관들을 대상으로 그들의 활동 속에서 경험한 지원상의 어려움, 인간 관계, 관계 개선을 위한 노력 등을 분석함으로써 향후 탈북자 지원 업무를 담당할 경찰관들과 자원봉사자들, 관련 공무원들을 활동을 더욱 효과적으로 하는데 목적이 있다. 방법: 과거 탈북자 보호 업무를 2년간 담당하였던 전국의 경찰관 전원을 대상으로 경찰청의 도움을 받아 설문조사를 실시하였다. 결과: 총 172명의 경찰관이 설문에 답하였다. 탈북자들의 성별, 연령, 학력에 따른 인간관계 평균점수에는 통계적으로 유의한 차이가 없었다. 그러나 인민학교 출신 탈북자들은 유일하게 시간이 지남에 따라 인간 관계가 더 나빠지는 것으로 나왔다. 또한 인간관계 유형도 연령대에 따라 다르게 나왔다. 탈북 경로에 있어 북한에서 직접 남한으로 들어온 사람들이 러시아, 중국 등을 경유하여 들어온 사람들보다 인간관계 평균점수가 통계적으로 유의하게 더 좋게 나왔다. 경찰관들의 연령대에 따른 인간관계 평균점수의 차이는 없었으나 관계 유형에는 차이가 있었다. 경찰관들이 탈북자들의 문제를 직접 해결을 하려고 나섰을 경우보다 교육행동적인 태도를 가지고 있었을 때 인간관계 평균점수가 통계적으로 더 유의하게 좋게 나왔다. 적응 초기에는 불안과 불신, 사회 부적응 등이 인간 관계에 문제가 되었으나 후기에는 자립의지 부족, 이기주의, 돌출행동 등이 문제가 되었다. 결론: 본 연구는 보호경찰관들과 탈북자들간의 인간관계가 그들의 인구학적 특징, 탈출 경로 등에 따라 다르게 나타남을 보여주었다. 또한 인간 관계를 좋게 하기 위한 노력의 방법이나 지원 방법에 따라 인간관계가 다르게 나타남을 보였다. 이것은 탈북자들을 지원함에 있어 과학적인 지침이 요구됨을 보여주는 것이었다. Objectives: The purpose of this study is to analyze the experience of South Korean police-men who are in charge of supporting the North Korean defectors' adaption to South Korean society for 2 years. Method: Written-form survey questionnaire were sent to all policemen who were in charge of defectors with the help of the National police bureau. Results: 172 policemen answered to survey questionnaire. There was no difference of human relationship score according to the defectors' sex, age, academic career. But defectors with low academic career showed bad human relationship as time went by. The type of human relationship change were different according to the defectors' age. Defectors who entered to South Korea directly from North Korea in short period had a better relationship in comparison with those who escaped to China or other third countries and stayed there for a long time to get a chance to enter to South Korea. As the policemen are younger, the relationship scores were better. But when some problem occurred in their relationship, younger policemen were less successful in solving the problem. There were many kind of efforts of policemen to improve the human relationship and it showed that the education-oriented effort is more effective and successful than direct problem-solving effort. Conclusions: This study showed that the human relationship of defectors and policemen in charge are affected by some demographic factors and defection routes and the types of efforts of policemen to improve the human relationship. It was suggested that the role of policemen in charge of defectors should be more well-defined, and NGO(Non Government Organization) need to have more continuos and specified program to help defectors' adaptation. Finally, the importance of continuing scientific researches about defectors' adaptation was emphasized.

초임계프로판에 의한 폐윤활유의 재생과 공정의 경제성

전정호,박민우,배효광 영남대학교 공업기술연구소 2000 工業技術硏究所論文集 Vol.28 No.2

The feasibility of supercritical extraction processes of waste lubricating oil by estimating the production costs of re-refining oil was discussed. The process was carried out at the supercritical condition of 150 and 100 bar, which was the optimum regeneration condition for waste lube oil and had already established using half and full-contineous appratus of supercritical exctraction. The supercritical extraction of waste lube oil was estimated to cost down 10%∼20% of brand-new oil.

제 3형 구상돌기 골절의 수술적 치료

전인호,민우기,오창욱,경희수,박병철,김풍택,인주철,이정엽 대한골절학회 2004 대한골절학회지 Vol.17 No.4

목적: 8례의 제 3형 척골 구상돌기 골절에 대해 수술적 치료 후 임상적 방사선학적 결과를 보고하고자 한다. 대상 및 방법 : 8명의 구상돌기 골절에 대한 후향적 연구를 시행하였다. 대상은 모두 남자였으며 평균 나이는 33세였다. 3례에서 척골 구상돌기 단독 골절이었으며 2례에서 주관절 탈구가, 2례에서 요골 두 및 경부 골절이, 1례에서 내측 측부인대 손상이 동반되었다. 전례에서 전방 도달법을 통해 유관나사를 이용한 관혈적 정복 및 내고정이 시행되었다. 평균 추시 기간은 31개월 이었으며 (24~60개월), Mayo Elbow Performance Score로 임상적 결과를 판정하였다. 결과 : 최근 추시에서 평균의 능동적 주관절 가동범위는 105°였다. 평균의 Mayo Elbow Performance Score는 76.9점이었다(50~95). 1례에서 최우수, 4례에서 우수, 2례에서 양호, 1례에서 불량의 결과를 보였다. 결론 : 제 3형의 척골 구상돌기 골절에서 조기의 관혈적 정복 및 안정적인 내고정으로 신뢰할 만한 치료를 제공하였으며, 손상 주관절의 동반된 인대손상과 복합골절은 중요한 예후인자로 간주되었다. Purpose: To review the clinical results of eight cases of typeⅢ coronoid process fractures which were treated operatively. Materials and Methods : Eight patients with coronoid type Ⅲ were reviewed retrospectively. All were men with an average age of 33. There were three isolated fractures, two elbow dislocations, two radial head and neck fractures, and one medial collateral ligament rupture. Open reduction and internal fixation through anterior approach with canulated screws was used. The patients were followed up for a mean of 31 months(24 to 60). Results: Average active elbow joint motion at the most recent follow up was 105°. The average Mayo Elbow Performance Score was 76.9 (50 to 95). There was one excellent result, four good, two fair, and one poor. Conclusion: Early open reduction and stable internal fixation provided a reliable method for the treatment of typeⅢ coronoid process fractures. Any associated ligament injuries to the elbow and fracture comninution were considered as important prognostic factors.