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- 저자 : 이재광(Jae-Kwang Lee) (검색결과 324 건)
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이재광,박철,이두별,이상우,Lee, Jae-Kwang,Park, Chul,Lee, Doo-Byoul,Lee, Sang-Woo 한국해양학회 2012 바다 Vol.17 No.2
반폐쇄적인 구조의 천수만에서 환경요인과 동 식물플랑크톤 군집과의 관계를 파악해 보았다. 식물플랑크톤 군집은 계절에 따라 변하는 일사량과 수온 그리고 담수 유입에 따른 영양염 공급에 의해 조성변화가 일어났으며, 한 달 이내의 짧은 기간에 서해 연안의 다른 해역에서보다 큰 폭으로 변화하였다. 담수 방류가 겨울철(2월)에는 규조류의 증식에, 여름철(7~8월)에는 표층에 한해서 와편모류의 증식에 많은 영향을 미치고 있었으며, 식물플랑크톤 중 규조류 군집은 크기별 천이현상이 관측되었다. 동물플랑크톤은 먹이농도와 수온, 염분에 의해 군집의 구조가 변하고 있었으며, 주성분 분석 결과 계절변화와 그에 따른 식물플랑크톤 현존량 변동에 약 32%, 담수방류에 의해 약 17%정도의 영향을 받고 있는 것으로 추측되었다. 과거 1985-1986년, 1991-1992년과의 비교에서 주요 우점종인 Acartia hongi, Paracalanus parvus sensu lato, Centropages abdominalis는 비슷한 계절별 변동과 조성률을 보였으나 출현양은 과거보다 약 3배 이상 증가하였고, 요각류 이외의 다른 분류군에서는 조성의 변화가 관측되었다. Relationship between plankton assemblage and environmental factors in a semi-closed Chunsu Bay was examined. Temporal changes in phytoplankton assemblage was rather drastic than those found in most Korean coastal area in the Yellow Sea primarily due to the seawater temperature (T) and nutrient input from the dikes nearby. Freshwater discharge seemed to cause winter time increase of Diatoms (February) and summer time increase of Dinoflagellates at surface (July to August). Structural change in cell size with time was also found in Diatom. Zooplankton community structure was also changed with season probably due to the food concentration, seawater temperature and salinity (S). From principal component analysis (PCA) of zooplankton distribution, it was postulated that seasonal environmental changes such as T and S could explain about 32% of variability in zooplankton distribution along with phytoplankton cell numbers, while freshwater discharge could explain about 17%. Comparing with past data of 1985-1986, 1991-1992, the distributional patterns and percent composition of major species, Acartia hongi, Paracalanus parvus sensu lato and Centropages abdominalis, were similar. However, the abundances have been increased more than three times. The composition of other taxa than copepods showed significant changes.
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KURT 암반 단열에서 현장 용질이동 실험: 실험 장치 설치 및 현장 용질 이동 실험
이재광,백민훈,이태엽,박경우,정종태,Lee, Jae-Kwang,Baik, Min-Hoon,Lee, Tae-Yeop,Park, Kyung-Woo,Jeong, Jongtae 한국방사성폐기물학회 2013 방사성폐기물학회지 Vol.11 No.3
An in situ solute migration system was designed and installed in KAERI Underground Research Tunnel (KURT) constructed in the site of Korea Atomic Energy Research Institute (KAERI) in order to investigate the migration and retardation of non-sorbing and sorbing tracers through a rock fracture. The system is composed of three main parts including injection, extraction, and data treatment. For the selection of a water-conducting fracture, boreholes were drilled. The fractures in the drilled boreholes were investigated using borehole image analysis using borehole image processing system (BIPS). The results of BIPS analysis showed that borehole YH 3-1 and YH 3-2 were connected each other. Moreover, hydraulic tests were carried out to determine the test section with connectivity for the in situ experiments. The in situ solute migration experiments were accomplished to understand the migration of solutes through fractures in KURT using non-sorbing tracers which were fluorescein sodium, eosin-B, bromide and sorbing tracers which were rubidium, nickel, zirconium, and samarium.
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불가사리와 조개껍질을 개량제로 이용한 소화슬러지의 탈수 증진 비교
이재광,유대현,이면주,강호,Lee, Jae-Kwang,Yoo, Dae-Hyun,Lee, Myeon-Ju,Kang, Ho 한국자원리싸이클링학회 2004 資源 리싸이클링 Vol.13 No.3
불가사리와 조개껍질의 폐 수산자원을 개량제로 이용한 도시하수 슬러지의 탈수능 향상 연구를 수행하였다. 불가사리와 조개껍질을 105∼$700^{\circ}C$로 열처리하여 사용하였으며, 탈수방법으로는 원심분리와 벨트프레스를 사용하였다. 총 고형물 기준으로 개량제를 1∼8g/100mL 주입하여 탈수 후 슬러지 케익의 함수율을 15∼22% 저감시키는 결과를 얻었다. 개량제 주입 후 슬러지의 탈수 특성을 평가하기 위하여 CST(Capillary Suction Time)를 측정하였다. 불가사리 첨가 후 CST는 증가하는 경향을 나타내었으나, 조개껍질 첨가 후 CST는 감소하는 경향을 나타내었다. 조개껍질이 불가사리보다 탈수 효율이 나은 결과를 보였으며, 열처리 온도에 대한 효과는 무시할 수 있을 정도로 적게 나타났다. A study on the enhancement of the dewaterability of sewage sludge was carried out by using the sea waste materials as a dewatering aid. It was made from a starfish and a shell by heating at $105∼700 ^{\circ}C$ and centrifuge and belt press were used as a mechanical dewatering process. The moisture content of sludge cake was reduced by 15∼22% (w/w) after addition of the dewatering aid at the dose of 1∼8 g/100mL of digested sludge. CST (capillary suction time) was measured to evaluate the effect of dewatering aid on sludge dewatering properties. CST was reduced after addition of a shell while increased after addition of a starfish. Enhancement of dewaterability after addition of a shell was better than that of a starfish. The heating temperature effect of the dewatering aid on dewaterability was not clear.
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이동 객체 좌표의 시간적 히스토그램 기반 행동패턴 분석 및 검색 디스크립터 설계
이재광,이규원,Lee, Jae-kwang,Lee, Kyu-won 한국정보통신학회 2017 한국정보통신학회논문지 Vol.21 No.4
이동 객체 정보로 이루어진 디스크립터 및 시간적 히스토그램 기반 움직임 패턴 분석 알고리즘을 제안한다. 이동객체의 검출, 추적 및 분석을 위하여 배경으로부터 이동객체를 분리하는 배경학습을 수행한다. 무게중심의 좌표연관성을 이용하여 객체를 식별한 후 객체별로 추적한다. 시간적 히스토그램은 객체의 무게중심의 위치와 시간 정보를 이용해 움직임 특징 패턴을 정의한 것으로서 시간적 히스토그램으로부터 각 객체의 좌표정보와 비교하여 움직임특징 및 행동정보를 파악한다. 검출된 각 객체의 시작프레임, 종료프레임, 위치 등 행동정보를 연결리스트에 저장하여 관리한다. 저장된 정보들을 바탕으로 디스크립터를 작성하고 비디오 검색 알고리즘을 설계한다. 다양한 객체 이동 비디오에 대한 검색 실험을 통해 기존 방법보다 높은 검색 정확도를 보임을 확인하였다. A behavior pattern analysis algorithm based on descriptors consists of information of a moving object and temporal histogram is proposed. Background learning is performed first for detecting, tracking and analyzing moving objects. Each object is identified using an association of the center of gravity of objects and tracked individually. A temporal histogram represents a motion pattern using positions of the center of gravity and time stamp of objects. The characteristic and behavior of objects are figured out by comparing each coordinates of a position history in the histogram. Behavior information which is comprised with numbers of a start and end frame, and coordinates of positions of objects is stored and managed in the linked list. Descriptors are made with the stored information and the video retrieval algorithm is designed. We confirmed the higher retrieval accuracy compare with conventional methods.
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외엽형 폐격리증을 동반한 선천성 낭종성 신종양 기형 - 1례 보고 -
이재광,권종범,박건,곽문섭,심성보,Lee, Jae-Kwang,Kweon, Jong-Bum,Park, Kuhn,Kwack, Moon-Sub,Sim, Sung-Bo 대한흉부심장혈관외과학회 2000 Journal of Chest Surgery (J Chest Surg) Vol.33 No.7
선천성 낭종성 선종양 기형과 외엽형 폐격리증은 아주 드문 질환이다. 본원에서는 4세 된 여자환자에서 좌폐화엽의 선천성 낭종성 선종양 기형을 수술하던 중 우연히 외엽형 폐격리증이 동반된 것을 알고 좌폐하엽 절제술과 외엽형 폐격리증 절제술을 시행하였는데, 외엽형 폐격리증은 흉부대동맥에서 비정상적으로 직접 1개의 동맥으로 유입되고, 늑간정맥을 통하여 기정맥으로 유출되었다. 환자는 수술 후 건강하게 퇴원하였다. Congenital cystic adenomatoid malformation and Extralobar Pulmonary sequestration are very rare congenital anomalies. We experienced a 4 year-old female patient who had Congenital cystic adenomatoid malformation in her lower lobe of left lung. We accidently found extralobar pulmonary sequestration associated with Congenital cystic adenomatoid malformation at operation field. The resection of the left lower lobe and the extralobar pulmonary sequestration were performed. The arterial supply of the extralobar pulmonary sequestration was one anomalous artery arised from the thoracic aorta. The Venous drainage of expralobar pulmonary sequestration was intercostal vein into the azygous vein. The patient was discharged without any problem.
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오심과 구토를 호소하는 한 여자환자에 대한 단기정신치료 증례보고
이재광,Lee, Jae-Kwang 한국정신신체의학회 1995 정신신체의학 Vol.3 No.2
The author reported a case of short-term dynamic psychotherapy in which relatively good therapeutic results were obtained. And I reviewed several therapeutic factors thought to be important in shot-term dynamic psychotherapy from various literatures. In this case, the frequency of session was limited due to her current reality situations. She had suffered from some adjustmental problems and marital conflict before the onset of the illness. The author could grasp the cental theme of her problems early in treatment period and discussed over it including it's influence on current situation and early childhood with th patient. We also discussed about the relationship between the past and current reality so that she could realize her real problem. At the same time, therapeutic effect was enhanced by family therapy and temporary use of medication.
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영국 주거실태조사 분석을 통한 주택소비 특성에 관한 연구
이재광(Lee, Jae-Kwang) 한국주거학회 2020 한국주거학회 논문집 Vol.31 No.2
The recent years have witnessed that it is an important objective for policy makers and public housing suppliers to understand housing market from the viewpoint of housing consumers. This study explores English housing survey in three ways to draw useful implication. First, it is found that English housing survey includes detailed information that allows the UK government to make effective housing policies. Second, it is found that housing consumers in England can be classified into four groups which have several sub-groups showing different characteristics in terms of household composition, income, housing costs, and affordability. An interesting point is that a lower-income group has a greater number of sub-groups than a higher-income group, indicating that the former shows more diverse housing needs in terms of housing welfare. Lastly, factors affecting the choice of owned and publicly rented houses are found to include households income, age, and employment status, and is also found that previous housing tenure is strongly related to the current housing tenure of households. An important point is that a certain group of household composition has emerged as an important player that housing welfare policy may look into, such as lone parent with children, female household, male one-person household.
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