허실변증(虛實辨證)과 가미청상보하탕(加味淸上補下湯)의 임상효과

이재성,정승연,이건영,이경기,정희재,이형구,정승기,최준용,Lee, Jae-Sung,Jeong, Seung-Yeon,Lee, Kun-Young,Lee, Kyung-Ki,Jung, Hee-Jae,Rhee, Hyung-Koo,Jung, Sung-Ki,Choi, Jun-Yong 대한한방내과학회 2004 大韓韓方內科學會誌 Vol.25 No.3

Objectives: The aim was to compare and analyse the clinical effects between excess syndrome and deficiency syndrome in asthmatics through treatment with herbal dicoction, Gamichuongsangboha-tang. Materials and Methods: The subjects consisted of 30 patients with asthma and were treated with Gamichuongsangbohatang for four weeks. All patients were divided into three groups as Excess Syndrome Group(ESG), Deficiency Syndrome Group(DSG) and Coexistence Syndrome Group(CSG). PHs were checked before and 4 weeks after treatments, and QLQAKAs were checked three times; before treatments, 2 and 4 weeks after treatments. The results of QLQAKA and PH were compared and analysed between ESG, DSG and CSG. Results: Treatment of Gamichuongsangboha-tang resulted in a significant increase of QLQAKA during the first two weeks in DSG and during the last two weeks in ESG. FEV1% and PEFR% significantly increased in both DSG and ESG. There were no significanctly changes of QLQAKA and PH in CSG. Conclusions: Observations suggest that asthma in DSG was more immediately and effectively managed through treatment with Gamichuongsangboha-tang than in ESG and CSG in ease of breading and pulmonary function.

H2 15O 양전자단층촬영술을 이용한 뇌기능 지도 작성 ( II ) - 작업 기억의 지도 작성

이재성,이동수,이상건,남현우,김석기,박광석,정재민,정준기,이명철 ( Jae Sung Lee,Dong Soo Lee,Sang Kun Lee,Hyun Woo Nam,Seok Ki Kim,Kwang Suk Park,Jae Min Jeong,June Key Chung,Myung Chul Lee ) 대한핵의학회 1998 핵의학 분자영상 Vol.32 No.3

Purpose: To localize and compare the neural basis of verbal and visual human working memory, we erforrned functional activation study using H2O PET. Materials and MethoDs: Repeated H213O PET scans with one control and three different activation tasks were performed on six right-handed narmal volunteers. Each activation task was composed of 13 matching trials. On each trial, four targets, a fixation dot and a probe were presented sequentially and subjects task was to press a response button to indicate whether or nat the probe was one of the previous targets. Short meaningful Korean words, simple drawings and monochromic pictures of human faces were used as matching objects for verbal or visual memory. All the images were spatially normalized and the differences between control and activation states were statistically analyzed using SPM96. Results: Statistical analysis of verbal memory activation with short words showed activation in the left Broca's area, premotor cortex, cerebellum and right cingulate gyrus. In verbal memory with simple drawings, activation was shown in the larger regions including where activated with short words and left superior temporal cortex, basal ganglia, thalamus, prefrontal cortex, anterior portion of right superior temporal gyrus and right infero-lateral frontal cortex. On the other hand, the visual memory task activated predominantly right-sided structures, especially inferior frontal cortex, supplementary motor cortex and superior parietal cortex. Conclusion: The results are :consistent with the hypothesis of the laterality and dissociation of the verbal and visual workmg memory from the invasive electrophysiological studies and emphasize the pivotal role of frontal cortex and cingulate gyrus in working memory system. (Korean J Nucl Med 1998;32:238-49)

10 V 이하의 프로그래밍 전압을 갖는 Ta2O5/SiO2 로 구성된 안티휴즈 소자

이재성,오세철,류창명,이용수,이용현 ( Jae Sung Lee,Seh Chul Oh,Chang Myung Ryu,Yong Soo Lee,Yong Hyun Lee ) 한국센서학회 1995 센서학회지 Vol.4 No.3

This paper presents the fabrication of ametal-insulator-metal(MIM) antifuse structure consisting of insulators sandwiched between top electrode, Al, and bottom electrode, TiW and additionally studies on antifuse properties depending on the condition of insulator. The intermetallic insulators, prepared by means of sputter, comprised of silicon oxide and tantalum oxide. In such an antifuse structure, silicon oxide layer is utilized to decrease the leakage current and tantalum oxide layer, of which the dielectric strength is lower than that of silicon oxide, is also utilized to lower the breakdown voltage near 10V. Finally sufficient low leakage current, below InA, and low programming voltage, about 9V; could be obtained in antifuse device comprising Al/Ta₂O₃(10nm)/SiO₂=(10nm)/TiW structure and OFF resistance of 3.65㏁ and ON resistance of 7.26Ω could be also obtained. This Ta₂O₃/ SiO₂= based antifuse structures will be promising for highly reliable programmable device.

해상 어류가두리양식장의 환경영향 평가: II. 가두리 양식장 퇴적물의 산소-황화수소 경계면에서 황화수소의 산화율 및 무산소 퇴적층에서 황산염 환원율 추정

이재성,김기현,유준,이필용,정래홍,이원찬,한정희,이용화,Lee, Jae-Seong,Kim, Kee-Hyun,Yu, Jun,Lee, Pil-Yong,Jung, Rae-Hong,Lee, Wong-Chan,Han, Jung-Jee,Lee, Yong-Hwa 한국해양학회 2004 바다 Vol.9 No.2

We measured the vertical profiles of $O_2$, H$_2$S, and pH in sediment pore water beneath marine cage fish farms using a microsensor with a 25 ${\mu}{\textrm}{m}$ sensor tip size. The sediments are characterized by high organic material load. The oxygen consumption, hydrogen sulfide oxidation, and sulfate reduction rates in the microzonations (derived from the vertical distribution of chemical species concentration) were estimated by adapting a simple one-dimensional diffusion-reaction model. The oxygen penetration depth was 0.75 mm. The oxic microzonations were divided into upper and lower layers. Due to hydrogen sulfide oxidation within the oxic zone, the oxygen consumption rate was higher in the lower layer. The total oxygen consumption rate integrated with reaction zone depth was estimated to be 0.092 $\mu$mol $O_2$cm$^{-2}$ hr$^{-1}$ . The total hydrogen sulfide oxidation rate occurring within 0.7 mm thickness was estimated to be 0.030 $\mu$mo1 H$_2$S cm$^{-2}$ hr$^{-1}$ , and its turnover time in the oxic sediment layer was estimated to be about 2 minutes. This suggests that hydrogen sulfide was oxidized by both chemical and microbial processes in this zone. The molar consumption ratio, calculated to be 0.84, indicates that either other electron accepters exit on hydrogen sulfide oxidation, or elemental sulfur precipitation occurs near the $O_2$- H$_2$S interface. Total sulfate reduction flux was estimated to be 0.029 $\mu$mol cm$^{-2}$ hr$^{-1}$ , which accounted for more than 60% of total $O_2$ consumption flux. This result implied that the degradation of organic matter in the anoxic layer was larger than in the oxic layer. 유기물이 많이 유입되는 해상어류가두리 양식장 퇴적물에서 전극 크기가 25$mu extrm{m}$인 미세전극을 이용하여 공극수의 산소, 황화수소, pH의 미세연직 농도를 측정하였다. 산소와 황화수소의 연직분포에서 얻어진 미세구간에 1차 확산ㆍ반응모델을 적용하여 각 구간에서의 산소 소모율, 황화수소 산화율, 황산염의 환원율을 추정하였다. 산소투과깊이는 0.75 mm였으며, 미세구간은 상부와 하부층 2개로 나누어졌다. 산소소모는 황화수소의 산화 영향으로 상부층에 비해 하부층에서 높았고 총산소소모플럭스는 0.092 $\mu$mol $O_2$$cm^{-2}$ $hr^{-1}$였다. 산화층에서 황화수소 산화는 0.7 mm 두께에서 0.030$\mu$mo1 H$_2$S $cm^{-2}$ $hr^{-1}$의 결과를 나타냈으며, 이 곳에서 황화수소의 turnover time은 약 2분으로 화학적 산화와 생물학적 산화가 동시에 일어나고 있었다. 황화수소와 산소의 소모율 비는 0.84로 황화수소 산화에 산소 이외의 다른 전자수용체가 사용되거나 산소-황화수소 경계면 주변에서 황 침전의 가능성을 시사하고 있었다. 추정된 총 황산염 환원 플럭스는 0.029$\mu$mol $cm^{-2}$ $hr^{-1}$로서 총산소소모플럭스의 60% 이상을 차지하고 있어 무산소 환경에서 유기물 분해가 산화환경에서보다 큰 역할을 하는 것으로 나타났다.

${H_2}^{15}O$ PET을 이용한 뇌혈류 파라메트릭 영상 구성을 위한 알고리즘 비교

이재성,이동수,박광석,정준기,이명철,Lee, Jae-Sung,Lee, Dong-Soo,Park, Kwang-Suk,Chung, June-Key,Lee, Myung-Chul 대한핵의학회 2003 핵의학 분자영상 Vol.37 No.5

목적: ${H_2}^{15}O$ PET의 정량화를 위하여 1-조직 구획모델이 쓰이며, 뇌혈류와 조직/혈액 분배계수를 구하기 위하여 nonlinear least squares (NLS) 방법이 사용되나 계산 시간이 긴 등의 문제로 파라미터를 각화소마다 구해야 하는 파라메트릭 영상 구성에는 적합하지 않다. 이 연구에서는 이와 같은 NLS 문제점을 극복하여 파라메트릭 영상을 빠르게 구성하기 위하여 제안된 파라미터 추정 알고리즘들을 구현하고, 이 방법들의 통계적 신뢰도와 계산의 효율성을 비교하였다. 대상 및 방법: 이 연구에서 이용한 방법들은 linear least squares (LLS), linear weighted least squares (LWLS), linear generalized least squares (GLS), linear generalized weighted least squares (GWLS), weighted integration (WI), 그리고 model-based clustering method (CAKS)이다. 노이즈 정도에 따른 각 파라메트릭 영상법의 정확성 및 통계적 신뢰성을 알아보기 위하여 Zubal 뇌모형(brain phantom)으로부터 동적 PET 영상을 모사하고 포아송노이즈를 더한 후 각 파라메트릭 영상 구성 방법을 적용하였다. 또한 정상인 16명에 대하여 얻은 실제 자료에 대하여 이 방법들을 적용하고 결과를 비교하였다. 결과: 뇌혈류와 분배계수에 대한 평균 오차는 방법에 따라 크게 다르지 않았으며 모든 방법이 뇌혈류 및 분배계수 추정에 있어 무시할 만한 바이어스를 보였다. 파라메트릭 영상의 정성적 특성 또한 유사하였으나 CAKS 방법의 계산 속도가 월등하여 NLS 방법의 약 1/500, LLS 방법의 약 1/25의 계산시간을 보였다. 결론: 뇌혈류 파라메트릭 영상 구성을 위한 빠른 파라미터 추정 알고리즘들 중에 보다 개선되어 제안된 LWS, GLS, GLWS, CAKS 방법들이 단순하고 빠른 LLS, WI 방법들에 비하여 통계적 신뢰성을 크게 향상시키지는 못하나 CAKS 방법은 계산 시간을 유의하게 단축시키므로 가장 적합한 파라메트릭 영상 구성방법이라 할 수 있을 것이다. Purpose: To obtain regional blood flow and tissue-blood partition coefficient with time-activity curves from ${H_2}^{15}O$ PET, fitting of some parameters in the Kety model is conventionally accomplished by nonlinear least squares (NLS) analysis. However, NLS requires considerable compuation time then is impractical for pixel-by-pixel analysis to generate parametric images of these parameters. In this study, we investigated several fast parameter estimation methods for the parametric image generation and compared their statistical reliability and computational efficiency. Materials and Methods: These methods included linear least squres (LLS), linear weighted least squares (LWLS), linear generalized least squares (GLS), linear generalized weighted least squares (GWLS), weighted Integration (WI), and model-based clustering method (CAKS). ${H_2}^{15}O$ dynamic brain PET with Poisson noise component was simulated using numerical Zubal brain phantom. Error and bias in the estimation of rCBF and partition coefficient, and computation time in various noise environments was estimated and compared. In audition, parametric images from ${H_2}^{15}O$ dynamic brain PET data peformed on 16 healthy volunteers under various physiological conditions was compared to examine the utility of these methods for real human data. Results: These fast algorithms produced parametric images with similar image qualify and statistical reliability. When CAKS and LLS methods were used combinedly, computation time was significantly reduced and less than 30 seconds for $128{\times}128{\times}46$ images on Pentium III processor. Conclusion: Parametric images of rCBF and partition coefficient with good statistical properties can be generated with short computation time which is acceptable in clinical situation.

Becoming Other, Becoming Imperceptible : A Philosophical Reading of A Gesture Life

Lee Jae-Seong(이재성) 새한영어영문학회 2010 새한영어영문학 Vol.52 No.4

This paper explores Chang-rae Lee’s A Gesture Life mainly from the perspective of Gilles Deleuze and Felix Guattari’s postmodern ethics. Also employed are the ideas of Emmanuel Levinas’s most profoundly ethical insight and Buddhist-Taoist thought, which shows how we can directly access to the fundamental self by abandoning egotism. The protagonist Hata’s spiritual journey and the aesthetic experience of the reader are both processes of “becoming other,” or “becoming imperceptible,” which is fundamentally an operation of pure difference in the self and thus which is becoming what is other than the self, the outside of the subjectivity. The reader’s becoming other is possible through affects or the sensible as such, through which the reader comes to glimpse the outside of both her comprehension of the story and her fundamentally egotistic subjectivity. “Body without Organs” is the result of the becoming process through which the reader is drawn close to the point of no-self. Therefore, this paper is an essentially philosophical reading of A Gesture Life.

듀얼 반사판을 이용한 광대역 보우타이 슬롯 안테나

이재성,이상우,Lee Jae-Sung,Lee Sang-Woo 한국정보통신학회 2006 한국정보통신학회논문지 Vol.10 No.8

In this paper, we have fabricated and tested a broad band bow-tie slot antenna with dual reflector. If we put 1/2 length thin and long slot on a wide metal plate, the slot antenna radiates efficient and strong radio wave as same as 1/2 dipole antenna does. we made with bow-tie form slot which has wider broad band than normal rectangular slot. At first, we made and test a single reflector slot antenna. To enlarge the broad band, we inserted another reflection plate between the slot antenna and reflection plate. After the test, we could have known that the low band(VSWR<2.0) has about $22%(793MHz\sim992MHz)$, high band(VSWR<2.0) has about 61% (1626MHz\sim3064MHz). 이 논문은 듀얼 반사판을 이용한 광대역 보우타이 슬롯 안테나를 제작 실험 했다. 슬롯 안테나는 넓은 도체판에 약 1/2 길이의 가늘고 긴 슬롯을 뚫게 되면 반파장 다이폴과 마찬가지로 효율이 좋고 강한 전파가 복사된다[1] 이 논문에서는 보통 사각 슬롯 보다 대역폭이 넓은 보우타이 형태의 슬롯으로 제작하였다. 먼저 단일 반사판 슬롯 안테나를 제작 실험 측정하였으며 제작된 단일 반사판 슬롯 안테나에 또 하나의 반사판을 슬롯 안테나와 반사판 사이에 삽입함으로서 대역폭을 확장하였다. 제작 실험 결과 VSWR<2.0 이하인 Low Band 대역폭은 약 $22%(793MHz\sim992MHz)$ 대역폭을 가졌으며 High Band 대역폭은 약 $61%(1626MHz\sim3064MHz)$의 대역폭을 가짐을 실험을 통해 알 수 있었다.

채널 정보 오차에 강인한 일반화 공간변조 수신기

이재성,우대위,전은탁,윤성민,이경천,Lee, JaeSeong,Woo, DaeWi,Jeon, EunTak,Yoon, SungMin,Lee, Kyungchun 한국정보통신학회 2016 한국정보통신학회논문지 Vol.20 No.1

본 논문에서는 전체 송신 안테나 중 일부 안테나만을 활성화하여 신호 송신에 사용하는 일반화 공간변조(Generalized Spatial Modulation) 시스템을 위한 최대우도 수신기를 제안한다. 제안 수신기는 신호 검출시 채널 정보 오차의 효과를 완화시키기 위하여 채널 정보 오차로 인해 생성되는 실질 잡음 신호의 순시 공분산 행렬을 추정한다. 추정된 공분산 행렬은 검출 정확도를 높이기 위해 반복수행을 통해 갱신되며, 추정 결과는 최대 우도 검출에 사용된다. 모의 실험 결과에서 기존의 채널 정보 오차를 고려하지 않는 수신기와 비교하여 높은 성능을 얻음을 확인할 수 있다. In this paper, we develop an iterative maximum likelihood (ML) receiver for generalized spatial modulation systems. In the proposed ML receiver, to mitigate the deleterious effect of channel information errors on symbol detection, the instantaneous covariance matrix of effective noise is estimated, which is then used to obtain improved ML solutions. The estimated covariance matrix is updated through multiple iterations to enhance the estimation accuracy. The simulation results show that the proposed ML receiver outperforms the conventional ML detection scheme, which does not take the effect of channel information errors into account.

무전해도금 및 방전 플라즈마 소결을 이용한 구리/흑연 복합재료 제조 및 열물성 특성 평가

이재성,강지연,김슬기,정찬회,이동주,Lee, Jaesung,Kang, Ji Yeon,Kim, Seulgi,Jung, Chanhoe,Lee, Dongju 한국분말야금학회 2020 한국분말재료학회지 (KPMI) Vol.27 No.1

Recently, the amount of heat generated in devices has been increasing due to the miniaturization and high performance of electronic devices. Cu-graphite composites are emerging as a heat sink material, but its capability is limited due to the weak interface bonding between the two materials. To overcome these problems, Cu nanoparticles were deposited on a graphite flake surface by electroless plating to increase the interfacial bonds between Cu and graphite, and then composite materials were consolidated by spark plasma sintering. The Cu content was varied from 20 wt.% to 60 wt.% to investigate the effect of the graphite fraction and microstructure on thermal conductivity of the Cu-graphite composites. The highest thermal conductivity of 692 W m^-1K^-1 was achieved for the composite with 40 wt.% Cu. The measured coefficients of thermal expansion of the composites ranged from 5.36 × 10^-6 to 3.06 × 10^-6K^-1. We anticipate that the Cu-graphite composites have remarkable potential for heat dissipation applications in energy storage and electronics owing to their high thermal conductivity and low thermal expansion coefficient.

대동맥판상 협착증 [Williams 증후군] 치험 1례

이재성,신기우,최순호,Lee, Jae-Seong,Sin, Gi-U,Choe, Sun-Ho 대한흉부심장혈관외과학회 1985 Journal of Chest Surgery (J Chest Surg) Vol.18 No.4

Supravalvular aortic stenosis was relatively uncommon form of congenital heart disease. This patient had typical "elfin faces" with mental retardation, and supravalvular aortic stenosis. The diagnosis was confirmed by pressure tracing obtained at retrograde left heart catheterization and aortography. The type of supravalvular aortic stenosis was localized hourglass narrowing, which was treated by insertion of prosthetic gusset placed across the area of narrowing under the cardiopulmonary bypass.ry bypass.