Pneumatosis intestinalis and portal venous gas secondary to gefitinib therapy for Lung adenocarcinoma

( Joo Young Lee1 ),( Hye-suk Han ),( Sung-nam Lim ),( Young Kwang Shim ),( Yong Hyeok Choi ),( Ok-jun Lee ),( Ki Hyeong Lee1 ),( Seung Taik Kim ) 대한내과학회 2011 대한내과학회 추계학술대회 Vol.2011 No.-

Sarcomatoid Carcinoma Arising from Mature Cystic Teratoma

Ho-Chang Lee1, Seung-Myoung Son, Yong-Moon Lee, Ji Hae Koo, Song-Yi Choi, Ok-Jun Lee, Eun-Hwan Jeong 충북대학교 동물의학연구소 2012 Journal of Biomedical and Translational Research Vol.13 No.2

Malignant transformation of mature cystic teratoma (MCT) is rare. Sarcomatoid carcinoma is a neoplasm comprising malignant mesenchymal cells and a conventional carcinomatous area. Here, we report on a case of sarcomatoid carcinoma arising from an MCT in the left ovary of a 45-year-old female. A unilocular cyst consistent with MCT was observed; however, a nodule within the cyst was confirmed from the resected ovary. Microscopically, the nodule showed both squamous cell carcinoma and pleomorphic sarcomatous components admixing with each other. Lining epithelial cells at the periphery of the main tumor showed squamous metaplasia. When a sarcomatous component is observed in the ovary tumor, it is important to find a squamous cell component, either benign or malignant.

시간지연을 갖는 적분 시스템의 PID 제어기 동조법

이윤형(Yun-Hyung Lee),안종갑(Jong-Kap Ahn),소명옥(Myung-Ok So),이준탁(Jun-Tack Lee) 한국마린엔지니어링학회 2007 한국마린엔지니어링학회 학술대회 논문집 Vol.2007 No.-

A simple tuning methods of PI, PD and PID controller are proposed for an integrating process with time delay. This is based on matching the coefficients of corresponding powers of s in the numerator and that in the denominator of the closed-loop transfer function. For set-point tracking problem, the derived controller is found to be a PD controller which is shown by Lee's tuning rule based on minimizing the performance indexes (lSE, IAE, ITAE) using a real-coded genetic algorithm. A method can be also proposed PI, PID controllers according to tuning parameter lambda (A) similar to IMC method. Simulation example is given to illustrate the set-point tracking performance of the proposed method.

혈액 투석 환자에서 중심정맥 협착에 대한 스텐트 삽입술 : Wallstent Placement

임대승,노상필,이유선,정승현,김보영,이정우,강정아,김정희,이민수,정준용,최시완,정진옥,성인환,이강욱,신영태 충남대학교 의과대학 의학연구소 2002 충남의대잡지 Vol.29 No.1

Stenosis of central vein is a common complication arising after percutaneous subclavian vein catheter insertion performed for temporary vascular access in chronic renal failure patients undergoing hemodialysis. There are several treatment methods for the condition like percutaneous angioplasty(PTA), stent insertion, and surgery, but recent trend is toward PTA and stents. Among the patients diagnosed with chronic renal failure from March 1993 to May 2002 and undergoing hemodialysis through AV fistula, the 14 Patients in whom central vein stenosis arose were selected for the study. A total of 28 percutaneous interventions(5 PTA and 23 stent placement) were performed, and restenosis rate and the time taken till the restenosis in de novo lesions and instant lesions were compared. All 28 cases were operated successfully. The 14 cases that received both anigioplasty and stent placement initially. (de novo lesion : 14 cases), Among the 10 cases with de novo lesion that followed up more than 1 year, 3 cases are currently undergoing hemodialysis without restenosis, and the remaining 7 cases have recurred stenosis with the mean time to restenosis of 10.9 months. In the 7 cases in whom stenosis recurred, 11 interventions were done(instent lesion: 11 cases). 4 of these were using only ballon angioplasty with 100% restenosis rate and the mean time of 3 months until restenosis. The remaining 7 cases were using both balloon angioplasty and stent placement, also with 100% restenosis rate but with the mean time of 12 months until restenosis, which was later than the group receiving only balloon angioplasty. In treating the patients with central vein stenosis, stent placement seems to be more advantageous over PTA in terms of restenosis rate and the mean duration of patency. In the case of instent lesion, inserting the stent for the second time after stenosis recurred lengthened the duration of patency compared to performing balloon angioplasty alone.

RBL-2H3 세포에서 Spermine에 의한 히스타민 유리와 칼슘유입에 미치는 상백피의억제효과

채옥희,강경진,신인호,김영기,이무삼,전병득 대한해부학회 1994 Anatomy & Cell Biology Vol.27 No.2

복합적인 레지스트 패턴 붕괴현장의 역학적 해석

이형주,박준택,안일신,김옥근,오혜근 한양대학교 이학기술연구소 2003 이학기술연구지 Vol.6 No.-

패턴의 선폭이 100nm이하로 작아짐에 따라 패턴이 부러지고, 휘고, 떨어져 나가는 현상이 발생하는데 이러한 현상을 패턴 붕괴 현상이라고 하며, 반도체 생산과 수율에 많은 영향을 미친다. 패턴 붕괴 현상은 리소그래피 과정 중 현상 후 세척액을 건조하는 과정에서 주로 발생하며 세척액의 표면장력에 의한 모세관 현상이 주된 원인으로 알려져 있다. 패턴 붕괴 현상을 시뮬레이션하기 위하여 패턴이 세척액에 의해서 균일한 압력을 받을 때와 집중 압력을 받을 때의 역학적 모델을 세우기 각각의 모델을 통하여 선폭과 패턴간의 거리에 따른 임계 높이/선폭비 (aspect ratio) 를 계산하여 실제 실험 결과와 일치하는 모델을 선정하였다. 또한 패턴 내부에 생기는 stress 에 의한 부러짐 현상과 패턴 과 레지스트 패턴 하부 층 사이의 접착력 부족으로 발생하는 떨어짐 현상을 해석하였다. High aspect ratio resist patterns with dimensions below 100 nm often bend, break or tear. These phenomena are generically called "resist pattern collapse". Pattern collapse is a very serious problem in fine patterning of less than 100 nm critical dimension (CD), so that it decreases the yield. In order to mechanically analyze this phenomenon and create its simulator, two models have been made and compared. In this paper, various approaches with various analyses are made to understand pattern collapse. Also, the critical aspect ratio for 100 nm node, that determines whether pattern collapse happens or not, can be calculated with these approaches. Finally, tear type caused by insufficiency of adhesion strength between the substrate and the resist is analyzed with a point of view of the surface free energy.

GDI 엔진의 흡기계 정상상태 유동 특성에 관한 연구

李珉湖,尹俊圭,車京玉 明知大學校 産業技術硏究所 2004 産業技術硏究所論文集 Vol.23 No.-

Lean burn gasoline engine, classified into port injection and direct injection, is recognized as a promising way to meet better fuel economy. Especially, gasoline direct injection engine is becoming increasingly popular due to their potential for improved fuel economy and emissions. Also, GDI engine has the advantages of higher power output, higher thermal efficiency, higher EGR tolerance due to the operation characteristics of increased volumetric efficiency, compression ratio and ultra-lean combustion scheme. However, GDI engine has many difficulties to be solved, such as complexity of injection control mode(fuel injection timing, injection rate), fuel injection pressure, spark timing, unburned hydrocarbon and restricted power. This study aims to develope fundamental key techniques for the lean burn in GDI engine. The techniques in this study include intake port design (SCV) and test method. Experimental is applied to investigate the effects of swirl control valves to improve the engine performance and emission, efficiency in GDI engine.

접촉 발광 소자 검사에 관한 연구

이준호,유영기,노병옥 선문대학교 ·중소기업기술지원연구소 2002 선문공대 연구/기술 논문집 Vol.7 No.1

접촉식 지문인식기에 사용되는 접촉발광소자는 투명전극층, 발광층, 기판층으로 구성되어 있고, 접촉발광소자의 기판부분에 지문이 접촉될 경우 전계(Electric Field)가 형성되어 빛을 발하게 된다. 이때 접촉발광소자에 발생되는 빛이 소자 전체에 균일하게 발생하여야 양질의 이미지를 획득할 수 있다. 본 논문에서는 이러한 특성을 검사하기 위해 비젼 시스템을 이용하여 접촉발광소자의 외형치수, 전계형성의 균일성, 지문영상의 대조 및 외부 조명에 의한 투과도 등의 센서의 성능을 검사하는 방법에 대하여 연구하고자 한다. CLED (Contact Light Emitting Device) has three layers consisting of a transparent electrode, a light emitting layer and a substrate. When the substrate of the CLED comes in contact with a fingerprint under AC input voltage, it makes an electric field between the fingerprint and the device. Due to the electric field, the light is emitted along the ridgeline of the fingerprint. The intensity along the ridge on the surface of the CLED increase in proportion to the electric field. To achieve the uniform performance of fingerprint verification devices, inspection system of CLED for quality control were required. In this research, we proposed the factors for quality controls such as dimensions of the CLED, uniformity, contrast, brightness and transmission. In addition, we realized the inspection system that is measured the quality control factors.

중성자에 조사된 원자로 압력용기 재료의 Barkhausen 노이즈에 관한 연구

옥치일,김장환,박덕근,홍준화,이종규 韓國非破壞檢査學會 1998 한국비파괴검사학회지 Vol.18 No.6

원자로 압력용기 재료인 SA508 steel을 온도 70℃와 대기압하에서 최고 10 n/㎠까지 중성자를 조사시켜 조사량에 따른 자기이력곡선과 Barkhausen noise amplitude(BNA), Barkhausen noise energy(BNE) 및 미세경도 변화를 측정하여 이들 사이의 상관관계를 구하였다. 중성자 조사에 의하여 자기이력곡선은 변화가 없었으며, BNA, BNE 및 경도는 중성자 조사량에 따라 세 단계의 변화를 보였으며, 중성자 조사량이 10 n/㎠에서는 급격히 변하여 이들 사이의 상관관계가 있음을 알 수 있었다. 따라서 BNA와 BNE가 중성자 조사에 의한 재료의 미세 구조 결함을 조사하는데 비파괴적인 방법으로 가능성이 있음을 알 수 있었다. Hysteresis loop, Barkhausen noise(BN), and hardness were measured in the neutron irradiated RPV steel for various fluence, irradiated dose up to 10 n/㎠. The coercivity, remanence and maximum induction of neutron irradiated samples did not change significantly, but the BNA and BNE were decreased as the neutron irradiation increased. The changes of BNE and BNA were characterized by three stages with respect to neutron dose. The BNA and BNE were decreased with an increase of neutron dose to 10 n/㎠, and remained nearly constant up to 10 n/㎠, then were decreased rapidly with an increase of the neutron dose above 10 n/㎠. On the other hand, the hardness was observed revesely with the change of BNA and BNE.

복합트레이닝이 수영경기력 및 근력에 미치는 영향

이정숙,안민호,이은희,신옥연,김영준,이윤관 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.6

This study was aimed to find what impacts the combined training of circuit weight training and swimming training can give to the competing power of swimming athletes and their respiratory functions and to provide the basic data for preparing the desirable training program to shorten swimming records through 14 girl swimming athletes, a group of 7 athletes in circuit weight training and another 7 in swimming training and the following conclusions were obtained: 1. Swimming and Circuit training groups showed, before and after 12 week training, the changes of muscular strength: grasping power (p<.001), back muscle (p<.01), arm extensor (p<.05), leg extensor (p<.05), leg curl extensor (p<.01), broad jump (p<.05) increased espectively than those of swimming training group and which were more effective. 2. In the comparison between groups, the meaningful difference appeared in swimming training groups, showing grasping power (p<.01), back muscular strength (p<.01), arm extensor (p<.05), leg extensor (p<.01), leg extensor (p <.01) 3. In the changes of competition record, in swimming and circuit training group, before and after 12 week training, meaningful increases appeared by 50m record(p<.05), 200m record (p<.05) 4. In the changes of competition record, as for the comparison between groups, meaning ful increases, 50m record (p<.05), 200m record (p<.05) appeared.