중증간경변증 환자에서 위산분비 및 혈청 Gastrin치의 동정

박승국,강영우,박재호 啓明大學校 醫科大學 1990 계명의대학술지 Vol.9 No.3

Increased incidences(5-40%) of peptic ulceration in the patients with liver cirrhosis have been observed but the pathogenesis has nit been clarified. Furthermore, elevated levels of gut hormones have been pointed out in cirrhotic patients, and an impairment of the inaction process at the liver was suggested as a mechanism of the elevation of some of gut hormones. And there was a tendency to correlate a pathogenesis of peptic ulcer with changes of acid output. This study was conducted to investigate the pathogenesis of peptic ulcer in liver cirrhosis, and the changes of acid output and serum gastin concentrations to the pentagasrin in patients with advanced liver cirrhosis and normal control subjects were checked. Fifteen patients with advanced liver cirrhosis and 10 normal control subjects were randomly selected for this study, and the basal acid output(BAO) and maximal acid output(MAO) after pentagastrin injection were measured. At the same time serum gastrin concentrations of each subject were measured before and 15, 45, 90, 120 minutes after pentagastrin injection(6ug/kg). The response of acid output to the pentagastrin was adequate in the patients with advanced liver cirrhosis as well as in the normal control group. There was no significant difference in amount and pattern of acid output between two groups. After injection of pentagastrin, the serum gastrin concentration increased significantly at 15 minutes in both groups, and it may be partially due to cross reaction of pentagastrin and serum gastrin. There was no significant difference in serum gastrin concentration between two groups. These results suggested the concentration of serum gastrin and gastric acid output did not seem to de direct relationship with pathogenesis of peptic ulcer in the patients with liver cirrhosis. Because the role of defense mechanisms in peptic ulceration was overlooked, further comprehensive study to evaluate their role is needed to make clear the payhogensis of peptic ulcer formation in liver cirrhosis.

악성 점막하 종양과의 구별이 어려웠던 Gastritis Cystica Profunda 1예

선제형,박진석,한민석,김수항,김우진,박인형,이숭,유종선,박찬국 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Gastritis cystica profunda (GCP) is a rare disease characterized by gastric foveolae elongation along with hyperplasia and cystic dilatation of the gastric glands extending into the tissue beneath the submucosa. GCP mainly develops at the gastroenterostomy stoma but can arise in a stomach that has not undergone surgery. The proposed pathogenesis is related to chronic inflammation, ischemia and the presence of a foreign body. GCP may present as a submucosal tumor, Polyp or a giant gastric mucosal fold. Endoscopic ultrasonography (EUS) is an effective diagnostic method for differentiating GCP from protruding and elevated gastric lesions. We report a case of GCP along with the endoscopic and EUS findings that were indistinguishable from a malignant submucosal tumor.

각종 소화성질환에서의 Campylobacter Pylori의 검출에 관하여

허정욱,강영우,박준호,박승국,하경임,김재룡,안성훈,박선우 啓明大學校 醫科大學 1988 계명의대학술지 Vol.7 No.2

Peptic disorders are among the most common maladies in korea as the world. In most cases their etiologies not be established and their pathophysioolgy remain obscure. Although the persence of fastric bacteria has been logn established, recently campylobacter pylori seems to be etiologic agent of peptic disorders. Campylobacter pylori is visualized in most cases of peptic disorders and not visualized after treatment of bctericidal agents, bismuth compound or metronidazole. We had a following results for identification of campylocacter pylori in stomach and duodenal mcuosa via endoscipc biopsy. 1. We studied 54 patients who had dyspeptic symptoms, 29 males. 2. Most patients are in 5th decades, next in 3rd and 6th in order. 3. Ptients were composed of 27 peptic ulcer, 22 gastitis and 5 gastric carcinoma. 4. Campylobacter pylori was identified in 69% of total patients, peptic ulcer 63%, gastritis 77%, stomach carcinoma leastly.

콘크리트내의 철근 및 공동탐사를 위한 측정과 분석

임홍철,박기준,이숭재 한국비파괴검사학회 2000 한국비파괴검사학회지 Vol.20 No.4

콘크리트 내부에 위치한 철근과 공동의 탐사 성능을 파악하기 위해, 상용 비파괴 검사 장비를 이용한 측정과 이론적 모델링을 실시하고, 향상된 신호처리 결과의 예를 제시하였다. 실측에 사용된 장비는 레이더 장비 2종과 전자기법 철근 참사 장비 2종이다. 철근 참사에는 직경 19mm의 철근을, 그리고 공동 탐사에는 두께 50mm의 스티로폼을 콘크리트 시험체 안에 각기 다른 피복 두께로 매립하여 측정하였다. 또한, 철근의 수평 배근 간격 탐사를 위해 두개의 철근을 매립 측정하였다. 실험과 함께 전자기파 모델링 방법을 소개하여, 레이더를 이용한 경우, 철근과 공동이 탐지되는 과정을 이론적으로 보여주었다. 탐사능을 향상시키기 위해, 상용 레이더 장비의 측정 결과를 신호처리 과정을 통해 개선하였다.

T 및 B cell 測定 : 1. 1次 成績 Ⅰ. Results, Primary

金在植,崔成萬,金在龍,全東錫,朴正姬,徐相喆,金仁子,金在崇,金重明 慶北大學校 醫科大學 1982 慶北醫大誌 Vol.23 No.2

E-rosette法에 의한 T cell의 百分率과 螢光抗體法, 感作牛赤血球擔體法, 酵素抗體法 및 마우스赤血球 rosette法에 의한 B cell 의 百分率을 檢査하여 다음과 같이 요약할 수 있었다. 정상성인군의 active T cell은 26±8.2%이었고 total T cell은 72±4.9%이었다. B cell 는 螢光抗體法으로 22±5.4%, 感作牛赤血球擔體法으로 15.8±4.9%, 酵素抗體法으로 15±5.2% 그리고 mouse RBC-rosette法으로 17.2±4.1%이었다. 惡性腫瘍에 있어서 active T cell은 27.±10.4%이었고 total T cell 은 59±11.2%로서 정상인군에 비하여 유의한 감소를 보였다. 良性疾患에 있어서 T cell 은 정상인군에 비하여 유의한 차이를 볼 수 없었다. T cell percent by E-rosette and B cell by fluorescent antibody, senitized ox RBC rosette, enzyme antibody and mouse RBC rosette tests were performed. In healthy adult group the active T cell was 26±8.2% and total T cell was 72±4.9%, B cell by fluorescent antibody was 22.±5.40%, by ox RBC rosette 15.8±4.9%, by enzyme antibody 15±5.2% and by RBC-rosette 17.2±4.1%. In malignant tumor the active T cell was 27±10.4% and total T cell was 59±11.2%. In benign diseases T cell count showed no significant difference from normal adult group.

곰쓸개 복용 후 발생한 육안적 혈뇨와 신유두부 괴사증 1예

김우진,한민석,김수항,박인형,박진석,선제형,홍세인,박옥영,신정현,이숭,신병철 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3

Renal papillary necrosis occurs most commonly in association with urinary tract infection, diabetes mellitus, sickle cell disease, vascular disease, and analgesic nephropathy. Clinical presentation may be related to symptoms of pyelonephritis such as flank pain, renal colic, hematuria, Proteinuria, recurrent fever. The necrotic tissue may be sloughed off, and the diagnosis can sometimes be made by finding piece of renal medullary tissue in the urine. Pyelography may demonstrate cavities and sinuses in the resion of papillae. Anuria & oliguria can lead to the acute renal failure, and especially prognosis and progress may be affect influenced by urinary infection. We report a case of renal papillary necrosis with ingestion of bear gallbladder. On pyelography, Persistent contrast is diagnostic clue of renal papillary necrosis. This case is not be related to urinary tract infection, but occurred acute renal failure. Expectant treatment was gone.

Research Paper : Warranties for Products with Varying Usage Intensity

Kin Jae Soong,Kim Ji Sung 한국산업경영시스템학회 2001 한국산업경영시스템학회지 Vol.24 No.64

Efficient Resource Allocation for Multiclass Services in Multiuser OFDM Systems

LEE, Jae Soong,LEE, Jae Young,LEE, Soobin,LEE, Hwang Soo The Institute of Electronics, Information and Comm 2009 IEICE TRANSACTIONS ON COMMUNICATIONS - Vol.92 No.2

<P>Although each application has its own quality of service (QoS) requirements, the resource allocation for multiclass services has not been studied adequately in multiuser orthogonal frequency division multiplexing (OFDM) systems. In this paper, a total transmit power minimization problem for downlink transmission is examined while satisfying multiclass services consisting of different data rates and target bit-error rates (BER). Lagrangian relaxation is used to find an optimal subcarrier allocation criterion in the context of subcarrier time-sharing by all users. We suggest an iterative algorithm using this criterion to find the upper and lower bounds of optimal power consumption. We also propose a prioritized subcarrier allocation (PSA) algorithm that provides low computation cost and performance very close to that of the iterative algorithm. The PSA algorithm employs subcarrier selection order (SSO) in order to decide which user takes its best subcarrier first over other users. The SSO is determined by the data rates, channel gain, and target BER of each user. The proposed algorithms are simulated in various QoS parameters and the fading channel model. Furthermore, resource allocation is performed not only subcarrier by subcarrier but also frequency block by frequency block (comprises several subcarriers). These extensive simulation environments provide a more complete assessment of the proposed algorithms. Simulation results show that the proposed algorithms significantly outperform existing algorithms in terms of total transmit power consumption.</P>

공학윤리교육의 필요성 및 교육내용과 방법

이재숭 ( Jae Soong Lee ) 한국윤리교육학회 2008 윤리교육연구 Vol.0 No.16

현대사회는 공학기술이 인류에게 절대적인 영향력을 행사하고 있는 시대이다. 하지만 공학과 기술이 인류에게 미치는 영향이 클수록 이들 분야에서의 도덕적 성찰과 함께 공학인들의 윤리적 문제해결 능력이 매우 중요한 요소로 대두되고 있다. 본 논문에서 필자는 우리보다 공학윤리 교육이 앞서 있는 외국의 사례들을 검토한 후, 국내에서 현재 진행되고 있는 공학윤리 교육의 동향도 간략하게 살펴보았다. 이를 통해 공학윤리 교육의 필요성을 부각시키고, 공학윤리에서 다루어야 할 주요한 내용들을 제시했다. 그리고 이러한 교육내용들이 효과적으로 학습되기 위해서는 응용윤리로서의 공학윤리를 먼저 이해해야 한다는 의미에서 몇 가지 필수적인 윤리이론들에 대한 학습이 선행된 후, 실제적인 그리고 가설적인 공학적 사고 사례들을 중심으로 사례중심의 교육이 병행되어야 함을 강조했다. 공학윤리 교육은 결국 미래의 공학인들로 하여금 직업적 실천에 있어 그들이 직면하게 될 여러 윤리적 상황들에서 이 상황들에 대한 쟁점들에 관해 비판적이고도 독립적인 판단능력을 배양하고, 더 나아가 이 상황들을 해결할 수 있는 ``도덕적 자율성``(moral autonomy)을 함양하는데 그 목표가 두어져야 할 것이다. The engineering and technology make a huge impact on the daily life of mankind today. However, the more technology affects to the world, the more ethical reflection is required to it. In this paper, I researched the present condition of foreign countries which an education of engineering ethics has developed, and then showed the present trend of ours. Through this work I argued the need of education of engineering ethics and made a suggestion a major contents of it``s education; ethical theory, the responsibility of engineer as a profession, codes of ethics etc. And to succeed this education, I think, the case-based approach is most useful. The education of engineering ethics has to aim to build engineering students into moral autonomy.

GaN Surface-Emitting Laser With Monolithic Cavity-Folding Mirrors

Lee, Jae-Soong,Lee, Joonhee,Jeon, Heonsu IEEE 2007 IEEE photonics technology letters Vol.19 No.5-8

<P>We report on the demonstration of a GaN-based surface-emitting laser (SEL) in a folded-cavity (FC) scheme. Two 45deg-angled sidewall deflectors were monolithically integrated at both the edges of an otherwise conventional InGaN multiple-quantum-well edge-emitting laser structure. Despite a low effective mirror reflectivity of R(<1%), the optically pumped broad-area laser structure produced laser oscillation in the vertical direction with a low threshold pump intensity of ~350kW/cm<SUP>2</SUP>. Computer simulations on the FC, which was based on the finite-difference time-domain method, not only quantified the cavity quality of our FC-SEL device but also suggested methods to lower the laser threshold</P>