화력발전 계통의 최적 부하 배분에 관한 연구

박상희,윤태성,김완종 연세대학교 산업기술 연구소 1986 논문집 Vol.18 No.2

This paper describes the application of dynamic programming(DP) method to solve the problem for optimal load dispatching of thermal power systems. A model system that is similar to the system of Korea electric power corporation is composed of 26 thermal generating units. In operating a model system, total generating fuel costs of two cases were analysied; one was the case of operating all units depending on the formula of equal incremental fuel costs, another was the case of the application of dynamic programming methods with proper starting-up and shutting down units. The computation results showed that the application of dynamic programming methods could reduce remarkably fuel costs(up to 3%) by using of practical data.

Thermal MOCVD와 DC pulsed PA-MOCVD에 의해 증착된 TiN 박막 연구

박용균,이영섭,이태수,이성재,조동율,천희곤 울산대학교 2001 공학연구논문집 Vol.32 No.1

유기화합물(TDEAT;Ti[N(C2H5)2]4)과 NH3를 이용하여 thermal MOCVD와 dc pulsed plasma assisted MOCVD(PA-MOCVD)인 2종류의 TiN박막을 증착하여 비교하였다. TiN박막의 특성분석은 XRD, AES, FE-SEM, α-step과 XPS로 연구하였다. DC pulsed plasma assisted MOCVD로 증착된 Tin박막은 ion bombardment 효과에 의해 열적으로 증착된 것보다 더 fine한 columnar구조를 나타내므로써 막의 결정질이 향상되었다. 플라즈마에서의 아르곤 이온의 충돌로 인해 탄소(C)는 오히려 유기 화합물보다 탄소 라디칼로 존재하였다. 따라서 탄소 라디갈은 기판의 강한 (-) potential에 의해 TiN박막에 trap되기 때문에 탄소(C)는 열적으로 증착된 TiN박막보다 더 많은 양이 존재하는 것으로 추정된다. By using of (TDEAT;Ti[N(C2H5)2]4)and ammonia gas source, we deposited two different TiN thin films with thermal MOCVD and dc pulsed plasma assisted MOCVD (PA-MOCVB). The properties of TiN thin films were studied by XRD, AES, FE - SEM, α - step and XPS analyses in this work. The TiN films deposited by dc pulsed PA - MOCVD have a little higher density and a fine columnar structure, compared with thermally deposited TiN thin films. This may be due to ion bombardment effect resulting in improved crystallinity in films. Carbon in the film may exist in the form of carbonic radical rather than organic compound because of collision with Ar ion in the plasma. Consequently, the content of carbon in the film of dc pulsed PA - MOCVD was higher than that in thermally deposited TiN films, because carbon radicals could be trapped in the film by strong negative potential of the substrate.

마이크로컴퓨터를 이용한 동안계의 Saccade 특성 연구

박상희,김남현,이용천 연세대학교 산업기술연구소 1985 논문집 Vol.17 No.1

Saccade velocity characteristics of human oculomotor system using microcomputer-based measurement system are investigated. Various interfaces are designed and constructed in hardware, and random target signals are generated in software. Electroculographic method is employed as measurement system and Dynograph is used as recording system. Peak velocities are 207, 254, 388 and 418 (deg/sec) for 5, 10, 20 and 30 (deg), respectively.

순환형 디지탈 필터의 설계와 구성

박상희,김종현 연세대학교 산업기술연구소 1982 논문집 Vol.14 No.1

The digital filter is the time invariant discrete system and has the advantages in accuracy, stability, flexibility and noise immunity. In this paper, digital low-pass filter, high-pass filter and digital differentiator are designed and its hardwares are implemented by using Intel 8085 microprocessor and digital LSI components. The digital butterworth low-pass filter and high-pass filter are designed by means of squared magnitude function and frequency transformation. The digital differentiator is designed by matched z-transformation.

위 MALT 림프종에서 다발성 림프절 전이로 오인된 동시성 림프절 결핵 1예

김성은,김규종,김도현,송준영,문대성,장리라,유찬희,문원,박무인,박선자,김영옥 고신대학교의과대학 2008 고신대학교 의과대학 학술지 Vol.23 No.2

28세 남자가 내시경적 점막절제술을 통해 저등급 위MALT 림프종으로 진단되었다. 병기설정을 위해 18F-FDG PET 검사를 시행하였고 우측 쇄골상부, 우측상/하부 기관주위, AP window 부위에 강한 섭취가 관찰되어 전이성 림프절로 판단하였다. 그러나, 우측 쇄골상부 림프절에서 시행한 절제생검에서 만성육아종성염증소견이 관찰되었고 조직의 결핵 중합효소연쇄반응에서도 양성 반응을 보였다. 2개월간 항결핵제의 사용 후 시행한 추적 컴퓨터단층촬영 검사에서 림프절 크기의 감소를 보여 최종적으로 위 MALT 림프종에서 광범위 림프절 전이로 오인된 동시성 림프절 결핵으로 진단되었다. A 28-year-old man was diagnosed as gastric MALT lymphoma in diagnostic EMR (endoscopic mucosal resection). He subsequently underwent an 18F-FDG PET. 18F-FDG PET showed intense multifocal uptake in right supraclavicular, right upper and lower paratracheal, and AP window areas that was considered radiologically to represent widespread metastatic lymphadenopathy. Excisional biopsy of a supraclavicular lymph node, however, revealed chronic granulomatous lymphadenitis with a positive reaction of Tb-nested PCR. After antituberculosis treatment for 2 months, a follow-up CT scan showed complete resolution of the lesions. Intense 18F-FDG uptake could be due to an infectious process such as synchronous tuberculous lymphadenitis. Therefore, this could mimic a malignant condition such as lymphoma with extensive lymph node metastasis due to a false-positive finding, which may lead to a misdiagnosis.

리더쉽에 관한 考察

朴星輝 건국대학교 1980 樂圓誌 Vol.15 No.1

관상동맥질환자에서 경흉부 도플러 심초음파를 이용한 좌심실 확장기 기능의 평가 : 좌심실 확장기 장애 형태에 따른 분류

전희경,윤호중,유기동,박지원,전두수,정욱성,채장성,김재형,최규보,홍순조 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.1

葦莖湯·加味葦莖湯의 A549에 對한 細胞毒性과 S-180에 對한 抗癌效果

김성훈,박정휘,박경식,김동희 대한동의병리학회 1995 동의생리병리학회지 Vol.9 No.2

연구배경 : 폐암은 최근 암사망률 중 17%로 위암과 간암에 이어 3위를 차지하고 있어 이의 치료와 연구는 중요한 과제로 등장하고 있다. 따라서 한의학적 측면에서 폐암에 해당되는 문헌을 찾아보아 이중 폐옹에 사용되는 길경탕과 최근에 각종 암에 다용되는 어성초, 白花蛇설초를 가미한 가미길경탕의 항암 효과 및 항암제와의 병용효과등을 현대적인 실험을 통하여 규명, 폐암에 대한 치료법을 제시하고자 함 방법 : in vitro에서 사람의 肺癌株인 A549에 對한 抗腫瘍效果와 cyclophosphamide(CPM), cisplatin(CPT), adriamycin(ARM), 5-fluorouracil(5-FU) 등의 4種 抗癌劑와의, 相乘作用을 살펴보고, ICR생쥐에 S-180을 腹腔 注射한 後 實驗 藥物을 口腔 投與하여, 生命延長率, 體重變化 및 血液檢査 등을 실시하였다. 결과 : 葦莖湯, 葦莖湯加魚腥草, 葦莖湯家伯花蛇舌草는 모두 肺癌에 對한 抗腫瘍效果가 認定되며, cyclophosphamide나 cisplatind을 倂用하거나 魚腥草나 白花蛇舌草를 加味하였을 경우 보다 效果的인 것으로 나타났다. In order to prove the antitumor effect of Wekyungtang(WKT) that was originated in Bigeubchunkeumyobang(備急千金要方), Wekyungtang with Houttuyniae Herba(WKT-I) and Wekyungtang with Oldenlandiae diffusae Herba(WKT-Ⅱ) on human pulmonary tumor cells experimentally, the studies were done. We evaluated the cytotoxic activity against A549 as well as the synergistic effects with anticancer drugs such as cyclophophamide(CPM), cisplatin (CPT), adriamycin (ARM) and 5-fluorouracil(5-FU) in vitro, and measured body weight, survival time, hematological changes in ICR bearing S-180. The results were obtained as follows: 1. IC50 against A549 was 16.24ug/ml in cyclophophamide (CPM), 8.01ug/ml in cisplatin(CPT), 8.39ug/ml in adriamycin(ARM) and 3.13 in 5-fluorouracil (5-FU) respectively. 2. Inhibitory effect on the adhesion of A549, the ratio of No. of antiadhesive cells to adhesive cells was 26.8/73.2 in WKT, 30.42/69.58 in WKT-Ⅰ and 35.12/64.88 in WKT-Ⅱ at the concentrations of 10-³g/ml, which indicates that antiadhesive effect was shown in the order of WKT-Ⅱ, WKT-Ⅰ, WKT. 3. In vitro the concentrations showing inhibitory growth rate below 55% of control against A549 was recognized in concentration of 10-³g/ml of WKT, the synergistic effect with CPM was shown in the concentration of 10-5 g/ml above of WKT, concentrations of WKT-Ⅰ, 10-³g/ml of WKT-Ⅱ, the syneristic effect with CPT was shown in the concentration of 10-5 g/ml above of WKT-Ⅱ, the synergistic effect with ARM was shown in concen -tration of 10-³g/ml of WKT-Ⅰ, WKT-Ⅱ, the synergistic effect with 5-FU was shown in concentration of 10-³g/ml WKT, WKT-Ⅰ, which indicated that CPT, CPM had the synergistic action with WKT. 4. In vivo, the gaining of body weight was significantly suppressed in all groups as compared with control group bearing S-180 and ILS was 10.45% in WKT, 16.43% in WKT-Ⅰ, 21.82% in WKT-Ⅱ respectively. 5. The number of platelet was significantly increased in WKT, WKT-Ⅰ and platelet aggregation was significantly increased in all roup as compared with control group. From the above results it was concluded that Wekyungtang and Kami-Wekyungtang had antitumor effect against A549 and wekyungtang combined with Houttuyniae Herba or Oldenlandiae difusae Herba was more effective than wekyungtang only, also cyclophophamide(CPM), cisplatin(CPT) exerted the more synergistic effect in the anticancer drugs.

디지탈 시스템의 故障診斷에 관한 硏究

李相孝,박상희,金在宇 연세대학교 산업기술연구소 1977 논문집 Vol.7 No.1

This paper deals with an efficient algorithm for generating the complete test set of every fault in combinational logic circuit, and fault detection and diagnosis technique based on Boolean Difference and Partial Boolean Difference. This study is mainly concerned with nonredundant combinational logic circuits. The type of fault is either stuck-at-o or stuck-at-1, i.e. at the input of a gate or at the output of a gate. The combinational logic circuits show a fault when the describing conditions correspond with the combinational logic circuits, for detecting S-A-O, or S-A-1, the method of generating test patterns is proposed, and the detection of fault at the circuit is attempted.

IBM-PC/AT를 중앙처리장치로 이용한 영상처리시스템의 설계

유경걸,박상희,최윤호 연세대학교 산업기술연구소 1991 논문집 Vol.23 No.2

In this paper, the 512×512×8 bit image processing system, which can acquire, process and display one frame image using IMB-PC/AT as a central processing controller, and implement high speed H/W logic, was designed, and its operation S/W of the total system was developed in the form of a menu for users' convenience.