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.

비정부기구(NGO)의 탈북자 지원 경험 분석 및 개선 방향

전우택,윤덕룡,강성록,김형중,민성길 연세대학교 통일연구원 2001 통일연구 Vol.5 No.1

Objectives: Since 1994, the number of North Korean defectors, escaping North Korea and entering South Korea, has increased rapidly.As the number of defectors has increased the role of non-governmental organizations(NGOs) in assisting the defectors' adaptation to their new society has become more important.To increase the successfulness and effectiveness of NGO activities, their experiences were surveyed and analyzed. Methods: Representatives or acting staffs of 11 NGOs presently supporting North Korean defectors' adaptation to South Korean society were interviewed by researchers between June 21 and October 14, 2000.And one focus group discussion meeting with 26 NGO personnel from 13 NGOs was held on November 4, 2000. Results: As for their stated purpose of activity; to help defectors become good citizens (7), to transform defectors into mediate personnel between North and South Korea (5), to protect the human rights of the North Korean people (3), and th advocate their religions (3).Out of the 11 organizations, only 5 had their own educational program for volunteers.The contents of the NGO's support for volunteers were as follows; counseling (7), introduction of employment and job education (6), direct financial support (5), creation of one-to-one relationships (4), assistance for their religious life (2), assistance with English study and mathematics (1), and medical service (1).NGOs listed the following difficulties; financial (7), human relationship with defectors (6), lack of volunteers and management of them (4), problems in the relationship with the South Korean government (3).NGOs stated a need for close cooperation with other NGOs, involving the activation of NGOs Association (5), and co-operative joint actions (4).Conclusion: Firstly, NGOs need to specialize in their field of activity.Their lack of specialized areas and of ability is the man obstacles to NGOs intercooperation and a major impediment on their effective operation.Secondly, NGOs should be careful in their direct financial support to defectors, because such a form of support has many serious governmental cooperation.The government also needs to have a more open mind in its dealings with NGOs.Fourthly, NGOs should cooperate, especially in areas of joint concern such as volunteer education program.Fifthly, NGOs should pay attention to their volunteers' personnel management and development.Sixthly, NGOs need to increase the degree of activeness with which defectors seek support from NGOs.Usually, it is the NGOs, which play an active role in the support process, so that defectors become passive and dependent leading to many problems.

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.

탈북자의 남한에서의 삶의 질

민성길,전우택,김동기 大韓神經精神醫學會 2006 신경정신의학 Vol.45 No.3

Objectives : This study was designed to evaluate the quality of life (QoL) of North Korean defectors in South Korean society and to identify factors influencing their quality of life. Methods : Subjects consisted of 151 defectors. Instruments were Korean version of WHOQOL-Bref, a questionnaire for demographic data, Beck Depression inventory (DBI) and part of PTSD of Korean version of SCID. Results : Generally QoL of the subjects was relatively higher in relations to domains of psychological and physical health, and facets of negative feeling, transportation, mobility, Physical pain and discomfort, personal belief, health and social care, work capacity, self-esteem, and thinking ability. However, QoL was relatively lower in environment domain and lowest in facets of financial resource, leisure activities and opportunity for new information and skills. A higher QoL was related to living with a spouse, having a job, having higher income and religious faith. A lower QoL was related to older age, having larger family, physical diseases, depression and PTSD. Path analysis showed that physical health and psychological domains directly influenced overall QoL while other domains influenced overall QoL indirectly. Conclusion : These results suggest that, to improve QoL of defectors, support in providing job and leisure activities, health service, especially mental heath service, and education program for new information and skills are needed.

지형학적 인자에 의한 달천수계의 계획홍수량산정

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

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Hough 변환에 의한 고속 원형물체 검출 알고리즘

전호민,최우영 명지대학교 산업기술연구소 2001 産業技術硏究所論文集 Vol.20 No.-

The several algorithms to detect circular boundaries from a digital image by Hough transform have been recognized as a robust technique. However, the algorithms are limited by slow speed and excessive memory. In this paper, a fast algorithm to detect the circular object with unknown radius is proposed. In this algorithm, the divide-and-conquer method is applied to reduce the computation time by using the property of area of cumulated points by the Hough transform. And the requirement of memory can be limited to the one 2-dimensional array of which size is the same as the source image. Experimental results show that the proposed algorithm gives better performance in comparision with Davies' Hough transform algorithm.