한국산(韓國産) 참나무과(科) 수종(樹種) 도관구조(道管構造)에 관(關)한 연구(硏究)(II) -도관벽(導管壁)의 수식구조(修飾構造)-

이성재,이원용,Lee, Sung Jae,Lee, Wan Yang 강원대학교 산림과학연구소 1992 Journal of Forest Science Vol.8 No.-

This study was carried out to investigate the micromorphology of vessel wall sculpture such as shape of perforation plate, perforation rim, steepness of perforation plate, occurrence of vestured pit, warty layer and ray-vessel pitting on 13 species of Fagaceae in Korea. The results were summarized as follows ; 1. In the species examined, all sample species except Fagus crenata var. multinervis have simple perforation plate. But Fagus crenata var. multinervis has simple and scalariform perforation plate (it was called to combination perforation plate) in a tree stem. 2. The shapes of perforation rim could be classified into five types; Type A without tail, Type B with small tail on both sides, Type C with long tail on both sides, Type D with tail only one side and Type E with the very short interval between perforations. Among five types, Type Band C have higer frequency of distribution than the others. 3. The steepness of perforation plate measured was about 20 degree on pore zone and 43 degree on outside parts of pore zone. 4. Species with vestured pit were Q. aliena, Q, dentata, Q. variabilis, Fagus crenata var. multinervis, Castanopsis cuspidata var sieboldii, Q. acuta, Q. stenophylla, and Q. glauca. But the extent of vesturing was very slight and vestured pits were observed mainly in ray-vessel pit of some vessel elements. 5. Species with warty layer on the inner surface wall of all vessel elements were Q. acuta, Q. stenophylla, Q. glauca, Fagus crenata var. multinervis and species with warty layer of some vessel elements were Q. aliena, Q, dentata, Q. variabilis, Castanopsis cuspidata var. sieboldii. 6. Species with palisade ray-vessel pit were Q. acuta, Q. stenophylla, Q. glauca, Castanea crenata, Castanea bungeana, Q. aliena, Q. serrata, Q. mongolica, and species with scalariform ray-vessel pit was Fagus crenata var. multinervis and species with oval ray-vessel pit were Q, dentata, Castanopsis cuspidata var sieboldii.

난소전위술을 시행한 가임기 여성의 자궁경부암 방사선치료 시 난소선량 감소를 위한 Halcyon^TM Fast kV CBCT의 유용성 평가 : Phantom study

이성재,신충훈,최소영,이동형,유순미,송흥권,윤인하,Lee Sung Jae,Shin Chung Hun,Choi So Young,Lee Dong Hyeong,Yoo Soon Mi,Song Heung Gwon,Yoon In Ha 대한방사선치료학회 2022 대한방사선치료학회지 Vol.34 No.-

Purpose: The purpose of this study is to evaluate the effectiveness of reducing the absorbed dose to the ovaries and the quality of the CBCT image when using the Halcyon^TM Fast kV CBCT of cervical cancer patients of child-bearing age who performed ovarian transposition Materials and Methods : Contouring of the cervix and ovaries required for measurement was performed on the computed tomography images of the human phantom (Alderson Rando Phantom, USA), and three Optically Stimulated Luminescence Dosimeter(OSLD) were attached to the selected organ cross-section, respectively. In order to measure the absorbed dose to the cervix and ovaries in the Truebeam^TM pelvis mode (Hereinafter referred to as TP), The Halcyon^TM Pelvis mode (Hereinafter referred to as HP) and The Halcyon^TM Pelvis Fast mode (Hereinafter referred to as HPF), An image was taken with a scan range of 17.5 cm and also taken an image that reduced the Scan range to 12.5cm. A total of 10 cumulative doses were summed, It was replaced with a value of 23 Fx, the number of cervical cancer treatments, and compared In additon, uniformity, low contrast visibility, spatial resolution, and geometric distortion were compared and analyzed using Catphan 504 phantom to compare CBCT image quality between equipment. Each factor was repeatedly measured three times, and the average value was obtained by analysing with the Doselab (Mobius Medical Systems, LP. Versions: 6.8) program. Results: As a result of measuring absorbed dose by CBCT with OSLD, TP and HP did not obtain significant results under the same conditions. The mode showing the greatest reduction value was HPF versus TP. In HPF, the absorbed dose was reduced by 39.8% in the cervix and 19.8% in the ovary compared to the TP in the scan range of 17.5 cm. the scan range was reduced to 12.5 cm, absorbed dose was reduced by 34.2% in the cervix and 50.5% in the ovary. In addition, result of evaluating the quality of the image used in the above experiment, it complied with the equipment manufacturer's standards with Geometric Distortion within 1mm (SBRT standard), Uniformity HU, LCV within 2.0%, Spatial Resolution more than 3 lp/mm. Conclusion: According to the results of this experiment, Halcyon^TM can select more various conditions than Truebeam^TM in treatment of fertility woman who have undergone ovarian Transposition , because it is important to reduce the radiation dose by CBCT during radiation therapy. So finally we recommend Halcyon^TM Fast kV CBCT which maintains image quality even at low mAs. However, it is consider that the additional exposure to low doses can be reduced by controlling the imaging range for patients who have undergone ovarian transposition in other treatment machines.

스마트폰중독과 정신병리 사이의 상관관계

이성재,김보라,최태규,이상혁,육기환,Lee, Sung-Jae,Kim, Borah,Choi, Tai Kiu,Lee, Sang-Hyuk,Yook, Ki-Hwan 대한생물정신의학회 2014 생물정신의학 Vol.21 No.4

Objectives This study aims to investigate possible associations between proneness toward smartphone addiction and certain psychopathological variables to evaluate the psychopathological meaning of smartphone addiction. Methods Questionnaires were assigned to 755 adults between September and November 2012. We used the Korean Smartphone Addiction Proneness Scale (SAPS), the Beck Depression Inventory (BDI), the Beck Anxiety Inventory (BAI), the Obsessive-Compulsive Inventory-Revised (OCI-R), and the Barratt Impulsivity Scale-11 (BIS-11). Subjects were classified into two groups according to the scores of the SAPS ; the addiction proneness group and the normal-user group. Results The addiction proneness group had significantly higher scores than the normal-user group in the BDI, BAI, OCI-R, and BIS-11. The scores of the SAPS were positively correlated with the scores of the BDI, BAI, OCI-R, and BIS-11. Using logistic regression analysis, smartphone addiction proneness showed a significant association with BIS-11. Conclusions The results of this study suggest that smartphone addiction proneness may be associated with depression, anxiety, obsessive-compulsive symptoms, and impulsivity. Furthermore, impulsivity could be a vulnerability marker for smartphone addiction proneness.

정지궤도 위성통신 환경모의를 위한 100 MHz 대역폭의 위성링크 시뮬레이터 개발

이성재,김용선,한태균,Lee, Sung-Jae,Kim, Yong-Sun,Han, Tae-Kyun 한국군사과학기술학회 2011 한국군사과학기술학회지 Vol.14 No.5

The transponder simulator designed to simulate the transponder of military satellite communication systems in the geostationary orbit is required to have time delay function, because of 250 ms delay time, when a radio wave transmits the distance of 36,000 km in free space. But, it is very difficult to develop 250 ms time delay device in the transponder simulator of 100 MHz bandwidth, due to unstable operation of FPGA, loss of memory data for the high speed rate signal processing. Up to date, bandwidth of the time delay device is limited to 45 MHz bandwidth. To solve this problem, we propose the new time delay techniques up to 100 MHz bandwidth without data loss. Proposed techniques are the low speed down scaling and high speed up scaling methods to read and write the external memory, and the matrix structure design of FPGA memory to treat data as high speed rate. We developed the satellite link simulator in 100 MHz bandwidth using the proposed new time delay techniques, implemented to the transponder simulator and verified the function of 265 ms time delay device in 100 MHz bandwidth.

집적광학용 격자구조의 제작과 응용

이성재,송재원,신상영,Lee, Seong-Jae,Song, Jae-Won,Sin, Sang-Yeong 대한전자공학회 1984 전자공학회지 Vol.21 No.3

Submicron gratings are fabricated holographically on thin film single mode and multimode waveguides. Thin film waveguides are made by spin-coating polyurethane solution on the substrates of microscope slide glass and Corning 7059 glass. In order to characterize thin film waveguides, the refract사e index and the thickness of thin films are measured by using the m-line spectroscopy. The fabricated gratings are tested as a grating coupler, a mode converter, and a beam splitter. Also chirped gratings are fabricated to observe beam expansion phenomena and thus the possibility of the wavelength demultiplexing.

SVG를 이용한 유${\cdot}$무선 인터넷 환경에서의 캐릭터 서비스

이성재,유남현,양수영,김원중,Lee Sung-Jae,Yoo Nam-Hyun,Yang Soo-Yung,Kim Won-Jung 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.8

현재 유선 인터넷 환경에서는 이미지를 표현하기 위하여 대부분 GIF와 JPG를 이용하며, 무선 인터넷 환경에서는 SVG, wBMP, SIS, PNG, Flash Lite 등과 같은 다양한 이미지 파일들을 이용한다. 따라서 유${\cdot}$무선인터넷을 동시에 지원하기 위한 콘텐츠를 제작하는 경우 이중으로 제작비용이 소요되는 문제점이 있다. 이에 본 논문에서는 유무선 인터넷을 동시에 지원할 수 있는 서비스를 재발할 때, SVG를 효율적으로 적용하는 방법을 제안하였다. 유${\cdot}$무선 인터넷을 동시에 지원하는 서비스에 SVG를 이용함으로써 유${\cdot}$무선 인터넷 기반의 콘텐츠를 제작할 때 기업이 지출해야 하는 개발비용을 크게 줄일 수 있다. Currently, most wired Internet describes an image file using GIF and JPG and wireless Internet uses various image files such as SVG, wBMP, SIS, PNG, and Flash Lite. Accordingly, overlapping occurs in the investment of production cost for making contents. This thesis proposes a Character(Avatar) service that could simultaneously aid both wired and wireless Internet by utilizing SVG, a vector based image file format for describing two-dimensional graphics. We will reduce cost of developing contents, when develop contents that simultaneously supports wired and wireless Internet using SVG.

역사적 시각에서 본 도시의 폐쇄성과 도농 대립

이성재(Sung-Jae Lee) 참여연대 참여사회연구소 2007 시민과세계 Vol.- No.11

설악산 국립공원 지역 토석류 발생가능성 평가 기법의 개발

이성재 ( Sung-jae Lee ),김길원 ( Gil Won Kim ),정원옥 ( Won-ok Jeong ),강원석 ( Won-seok Kang ),이은재 ( Eun-jai Lee ) 한국산림과학회(구 한국임학회) 2021 한국산림과학회지 Vol.110 No.1

최근의 기후변화는 산지토사재해의 발생을 가속시키고 있다. 산지토사재해 중 토석류는 전파길이가 길고 매우 빠른 거동 특성을 갖기 때문에 매우 위협적으로 인식된다. 본 연구는 설악산 국립공원내 토석류 발생지 263개소를 대상으로 발생 길이(m)에 미치는 영향인자를 구명하고, 수량화이론(I)을 사용하여 발생 길이에 대한 각 산림환경 인자의 기여도 분석을 하여 예방적인 측면에서 국립공원내 토석류 발생 가능성지역에 대한 예측기법을 개발하였다. 각 산림환경 인자의 Range를 추정한 결과, 종단사면(0.9676)이 가장 높게 나타나 설악산 국립공원의 토석류 발생 가능성에 큰 영향을 미치는 것으로 추정되었으며, 다음으로는 횡단사면(0.6876), 고도(0.2356), 사면경사(0.1590), 방위(0.1364) 순으로 나타났다. 설악산 국립공원 산악지 토석류 발생 발생가능성 판정표를 기준으로 5개의 산림환경 인자의 category별 점수를 계산한 추정치 범위는 0점에서 2.1864점 사이에 분포하고 있으며, 중앙값은 1.0932점으로 토석류 발생가능성을 예측을 작성한 결과 Ⅰ등급은 1.6399 이상, Ⅱ등급 1.0932∼1.6398, Ⅲ등급 0.5466∼1.0931, IV등급 0.5465 이하로 나타나 1등급, 2등급에서 토석류 발생 비율이 86.3%로서 높은 적중률을 보였다. Recently, climate change has gradually accelerated the occurrence of landslides. Among the various effects caused by landslides,debris flow is recognized as particularly threatening because of its high speed and propagating distance. In this study, the impacts of various factors were analyzed using quantification theory(I) for the prediction of debris flow hazard soil volume in Seoraksan National Park, Korea. According to the range using the stepwise regression analysis, the order of impact factors was as follows: vertical slope (0.9676), cross slope (0.6876), altitude (0.2356), slope gradient (0.1590), and aspect (0.1364). The extent of the normalized score using the five-factor categories was 0 to 2.1864, with the median score being 1.0932. The prediction criteria for debris flow occurrence based on the normalized score were divided into four grades: class I, >1.6399; class II, 1.0932-1.6398; class III, 0.5466-1.0931; and class IV, <0.5465. Predictions of debris flow occurrence appeared to be relatively accurate (86.3%) for classes I and II. Therefore, the prediction criteria for debris flow will be useful for judging the dangerousness of slopes.

태국 라마 6세 시대의 콘과 라마키엔

이성재(Sung-Jae Lee) 한국세계문화사학회 2020 세계 역사와 문화 연구 Vol.0 No.57

라마키엔은 인도의 라마야나에서 유래되어 성공적인 토착화 과정을 거친 태국의 대표 서사문학으로서 태국인들이 느끼는 희로애락과 가치관을 반영한 중요한 문화유산이다. 아유타야 왕조의 몰락으로 위축되었던 이 유산은 다행스럽게도 태국 왕실의 노력으로 부활에 성공했다. 특히 차크리 왕조를 열었던 라마 1세는 관련 자료들을 대거 모았으며, 태국의 상황에 맞게 라마아냐를 번안하는데 기여했다. 힌두문화 기반의 라마야나가 불교문화 기반의 라마키엔으로 탈바꿈한 것이다. 라마키엔을 내용으로 하는 가면극 콘은 라마 6세 시기에 크게 발전했다. 콘은 대중에게 쉽고 예술적인 형태로 라마키엔의 내용을 알렸으며, 더 나아가 국왕의 정치적 의도까지 담고 있었다. 당시 태국 정치의 최대 과제는 서양문화에 맞서 태국의 고유문화를 지키고 그 가치를 알리는 일이었다. 이에 라마 6세는 서양 연극을 도입하고 그 요소를 일부 차용하여 태국의 가면극인 콘을 그에 맞설 정도의 수준 높은 공연으로 발전시키려고 했다. 그러나 다른 한편으로 새롭게 힘을 얻은 관료들과 군인들의 반란 모의는 라마 6세를 어려운 처지로 몰아갔다. 이에 맞서 그는 야생 호랑이 부대와 같은 친위대 강화, 학교 설립, 공연 예술의 활성화와 같은 정책을 펼쳤으며, 라마키엔의 영웅담을 이용해 왕실에 대한 국민의 지지를 얻으려 했다. 결론적으로 라마 6세가 콘에 기울인 정성은 내외의 이러한 불리한 조건을 타개하기 위한 것이었다. 하지만 이런 그의 의도와 달리 태국은 왕권 강화와 근대화를 동일한 것으로 간주하지 않았다. Ramakien, which has been transformed into a traditional Thai epic based on the Ramayana in India, is an important cultural heritage that reflects the joys and sorrows and values that Thais feel. Fortunately, the legacy, which had been daunted by the fall of the Ayutthaya dynasty, has succeeded in reviving with the efforts of the current Chakri dynasty of Thailand. King Rama I, who opened the Chakri dynasty, collected a large number of related materials and contributed greatly to reinventing Ramakien to suit the situation in Thailand. The Hindu-based Ramayana was reborn as a Buddhist-based Ramakien. The Khon, traditional dance drama which performs the contents of Ramakien, has long been loved by Thais. In particular, Rama VI contributed greatly to its development. Khon was an effective medium to make it easier for the public to understand the contents of Ramakien in an artistic form. At that time, the biggest task of Thai politics was to protect Thailand s unique culture against Western culture and to publicize its value. In response, King Rama VI tried to develop the traditional Thai dance-drama Khon into a high-quality performing art that would rival western culture even by introducing Western theatre and borrowing some of their elements. On the other hand, the conspiracy of rebellion by newly empowered officials and soldiers drove Rama VI into a difficult position. He implemented various policies to strengthen the royal authority. These include strengthening pro-defense forces such as the Wild Tiger Corps, establishing college, and revitalizing performing arts. In conclusion, Rama VI s devotion to the Khon was intended to overcome these unfavorable internal and external conditions. Contrary to his intentions, Thais did not consider the strengthening of the royal authority and modernization as the same.

근ㆍ현대 이탈리아 건축드로잉에서 나타난 표현 특성에 대한 연구

이성재(Lee. Sung-Jae),임종엽(Lim. Jong-Yup) 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1

The purpose of this study is to reflect on correlation of drawing which expresses about Italian architects and their thought, especially to seek for making and developing architectural theory which becomes significantly symbolic seeds through drawing by architects before buildings are completed. This study is also to find out the way art and creative mutual understanding which implies in drawing as analyze and understand spaces from the seeing the world not to premise symbolic situations.<br/> <br/> <br/> <br/>