저장 온도 및 상대습도가 비타민 정제 중 지용성 비타민 함량의 변화에 미치는 영향

김동섭,이재황,김세곤,이동언,박석준,이진희,이강표,최성원,백무열 경희대학교식량자원개발연구소 2007 硏究論文集 Vol.26 No.1

좌전하행지 관동맥 개구부위의 망사형의 관(Slotted Tube)스텐트와 나선형 코일(Coil)스텐트 삽입후 단기 및 장기 암상 경과의 비교

박훈기,박성욱,이일수,이상곤,김진우,이근,정상식,이철환,홍명기,김재중,박승정 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.6

11세 여아에서 발생된 성숙 낭성 기형종의 염종1예

이희민,김재현,이봉주,하태규,김흥곤,윤기중 圓光大學校 醫科學硏究所 1996 圓光醫科學 Vol.12 No.1

Mature cystic teratomas comprise 10% of all ovarian tumors and show the highest frequency of incidence in women under 20 years of age. Torsion of ovarian cyst is the most common complication in young female and lower abdominal pain, peritonitis, necrosis and shock are outcomes that require emergency treatment. Generally, gross finding of mature cystic teratoma shows that most of the entire ovary is replaced by multiple cystic masses, and rarely only small portion of the ovary is changed into cystic mass. We report a case of torsion of mature cystic teratoma in an 11 year old girl with a brief review of literature.

國際環境法과 非政府間機構(NGO)

李載坤 忠南大學校 法學硏究所 1996 法學硏究 Vol.7 No.1

生命工學과 國際環境保護

이재곤 忠南大學校 法學硏究所 2004 法學硏究 Vol.15 No.1

Since its beginning in 1973, Biotechnology has been rapidly developed and resulted in many products which have been expected to solve many serious problems such as famine, disease and environmental pollution and also suspected to bring various risks to human health and the environment. This article analyzes the issues and problems arising from the development of biotechnology, which are closely related with international environmental protection, such as biosafety, the protection of biodiversity and genetic resources, the regulation of access to genetic resources and benefit sharing, and intellectual property rights for the protection of biodiversity. International community has been endeavoring to solve or regulate the problems appropriately through various means such as conclusion of international treaties, adoption of soft-law resolutions and holding international conferences. Inter-governmental international organizations, including WIPO, FAO, WTO and UNEP, have played important role in making some advance. For example, Biodiversity Convention, Cartagena Biosafety Protocol, Bonn Guideline for Access and Benefit Sharing, FAO Treaty on Food and Agricultural Genetic Resources can be illustrated as results of the endeavoring. However, there might be yet long way to go to arrive at the position where biotechnology can be useful for the international protection of environment without risks and the conflicts of interest between stakeholders.

데이터 삽입 순서를 고려한 다차원 인덱스 생성방안

이재호,김병곤,라기용 인천교육대학교 과학교육연구소 2001 과학교육논총 Vol.13 No.-

최근 들어 멀티미디어와 같은 고차원 데이터를 효율적으로 처리하기 위한 고차원 인덱스 구조에 대한 연구가 활발히 진행되어왔으며, 특히 R-트리를 기반으로 하는 인덱스 구조에 대한 연구가 가장 많이 발표되었다. 그러나, R-트리 계열의 색인기법은 데이터 삽입 시 삽입순서를 비효율적으로 배정하는 경우 실제적으로 자신과 거리가 먼 객체들과 동일한 노드에 삽입될 수 있다. 이는 인덱싱 구조 내에 많은 겹침을 초래하고 결과적으로 검색성능을 처하시킬 수 있다. 본 논문을 이러한 단점을 극복하기 위하여 데이터가 지니는 특성 즉, 공간적인 위치 정보를 분석하여 클러스터를 형서하고 이를 이용하여 인덱싱 형성에 적용하였고, 질의 처리 시 검색성능이 향상되도록 하였다. 또한 실험에서는 실제 이미니 데이터에 대하여 제안한 기법을 적용하여 성능이 향상되었음을 나타내었다. While the traditional data retrieval system can deal with text data and provides mechanisms for query processing technique for the text data, the multimedia data retrieval system is different from the traditional data retrieval system for that it can deal with multimedia data, such as image, audio, and video. Multimedia data are usually mapped to feature vectors in some multi-dimensional space such as color histograms, Fourier vectors, etc. For querying these data, appropriate indexing techniques such as R-tree, R*-tree and efficient query processing are important requirements in multimedia database systems. In this paper, we focused on the construction of R-tree variants indexing which is multi-dimensional indexing structure. A majority of multi-dimensional data retrieval systems thus produced have based their indexing structure on R-tree variants. Hence, research concerning improvements on efficient indexing construction in R-tree environments is meaningful.

Thermal cycling 과 시효처리가 Glass-Ionomer수복재의 인장강도에 미치는 영향

이승익,백병주,김재곤,이승영,김문현 大韓小兒齒科學會 1999 大韓小兒齒科學會誌 Vol.26 No.4

본 연구에서는 구강환경과 유사한 액상의 조건하에서의 온도변화가 광중합형 글래스아이오노머계 수복재의 인장강도에 미치는 영향을 평가하기 위해 대조군으로 2종의 재래형 glass ionomer를 선택하고 실험군으로 2종의 광중합형의 resin-modified glass ionomer와 2종의 polyacid-modified resin composite을 선택한 다음 수중에서의 thermal cycling과 시효처리를 행하였으며, 다음과 같은 결론을 얻었다. 1. 글래스아이오노머 수복재의 인장강도를 측정한 결과, polyacid-modified resin composite, resin-modified glass ionomer 그리고 재래형 glass ionomer의 순으로 나타났다. 2. 인장강도는 30일간의 시효처리로 증가되는 경향을 보였다. 3. 재래형 glass ionomer 수복재의 인장강도는 thermal cycling 처리로 증가되는 경향을 보였으며, 37℃의 증류수 중에 1시간 침적한 군과 10,000회의 thermal cycling을 비교한 결과 유의한 차이로서 강도의 증가를 나타냈다(P<0.01). 4. thermal cycling 군의 인장강도는 DR군이 45.4MPa로 최대치를, FL군이 13.4MPa로 최소치를 나타냈으며, 각 군간의 통계적 유의성을 검증한 결과 polyacid-modified resin composite의 인장강도가 나머지 군과 유의한 차이를 보였다(p<0.05). 5. 특성강도는 DR군이 48.6MPa로 가장 높은 강도치를 보였으나, Weibull 계수는 CG군이 8.9로 가장 높은 값을 보여 시험재료 중에서 가장 작은 강도의 분산을 나타냈다. This study was performed to evaluate the effect of aging and thermal cycling on the tensile strength of six commercially available glass-ionomer materials: two chemically set glass-ionomer materials(Fuji Ⅱ, fuji Ⅸ), two resin-modified glass-ionomer materials(Fuji Ⅱ LC, Vitremer), and two polyacid-modified composite resins(Compoglass, Dyract). Rectangular tension test specimens were fabricated in a teflon mold giving 5mm in gauge length and 2mm in thickness. All samples were divided into 3 groups. Group 1 was immersed in a 37℃ distilled water for 1 hour. Group 2 was immersed in a 37℃ distilled water for 30 days. Group 3 was subjected to 10,000 thermal cycles between 5℃ and 55℃, and the immersion time in each bath was 15 seconds per cycle. Tensile testing was carried out at a cross-head speed of 0.5mm/min and fracture surfaces were examined with scanning electron microscope. The results obtained were summarized as follows; 1. The polyacid-modified composite resins were stronger than the resin-modified glass-ionomer materials, which were much stronger than the conventional glass-ionomer materials. 2. Tensile strengths were slightly increased after aging treatments for 30days. 3. Tensile strengths of conventional glass ionomers were significantly increased after thermal cycling treatment(p<0.01). 4. The highest tensile strength value of 45.4MPa was observed in the Dyract group and the lowest value of 13.3MPa was observed in the Fuji Ⅱ LC group after the thermal cycling test, and the strengths of polyacid-modified composite groups were significantly higher than those of other groups. 5. The highest characteristic strength value of 48.6MPa was obtained in the Dyract group, however the highest Weibull modulus value of 8.9MPa was obtained in the Compoglass group after thermal cycling test.

한국산 바질(Ocimum basilicum L.)의 휘발성 성분

이재곤,안대진,곽재진,장희진,정기택,이종철 한국식품영양학회 1999 韓國食品營養學會誌 Vol.12 No.5

동시증류추출장치를 사용하여 분리한 Sweet계 바질(Ocimum basilicum)의 4개 품종(anise, darkopal, lettuce, sweet)의 휘발성 성분을 GC/MSD로 확인하였다 확인된 성분을 기능기별로 분류하면 alcohol 성분들이 11종, carbonyl 화합물이 6종, terpene 관련 화합물이 19종. ester 화합물이 5종으로 나타났다. 주요 화합물들은 1,8-cineole(2.86∼5.04%), camphor(1.07∼l.87%), α-Bergamotene(2.05∼5.40%), methyl chavicol(0∼25.49%), eugenol (3.55∼13.53%) 등의 carbonyl 화합물과 linalool(28.52∼36.50%), bornyl acetate(0.48∼2.79%), methyl cinnamate(0∼23.12%)등의 alcohol과 ester류, cis-ocimene(1.15∼2.02%), β -cubebene(2.77∼4.80%), cadinene(1.08∼1.70%)등의 terpene 화합물이 주요 성분으로 확인되었다. Darkopal, lettuce, sweet 바질은 linalool(30.09∼35.50%), methyl chavicol(8.09∼25.49%)이 주요 성분으로 나타났고, Anise 바질은 linalool(28.52%), methyl cinnamate(23.12%)가 주요 성분으로 확인되었으나 바질의 주요성분으로 알려져 있는 methyl chavicol은 검출되지 않았다. The essential oils of anise, darkopal, lettuce and sweet basils cultivated in Korea were extracted by simultaneous steam distillation and extraction method and were analyzed by GC/MSD. Total 41 components were identified in essential oils including 11 alcohols, 6 carbonyls, 19 hydrocarbons and 5 esters components. The major components were 1,8-cineole, linalool, α-bergamotene, β-elemene, methyl chavicol, β-cubebene, methyl cinnamate and eugenol. Darkopal, lettuce and sweet basils were rich in linalool(30. 1∼36.5%), methyl chavicol(8.1∼25.5%) and relatively poor in methyl cinnamate(0∼2.71%). Anise basil was rich in linalool(28.5%) and methyl cinnamate(23.1%). However, methyl chavicol, which was known as one of the main components of basil, was not detected.

國際投資紛爭解決本部(ICSID)와 對蘇聯 및 東歐投資紛爭解決에 관한 小考

李載坤 忠南大學校 法學硏究所 1990 法學硏究 Vol.1 No.1

對러시아經濟關係紛爭의 國際商事仲裁形式에 관한 小考

李載坤 忠南大學校 法學硏究所 1991 法學硏究 Vol.2 No.1