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崔尙惇,趙龍在,申光錫 경북대학교 과학교육연구소 1993 科學敎育硏究誌 Vol.17 No.-
As easy way to utilize the isolation-projection technique in deriving the cyclotron absorption formula is introduced.
Modeling of Plasma Processes for the Fabrication of Microelectronic Devices
Shin, Jai Kwang 호서대학교 반도체제조장비국산화연구센터 2001 Workshop 자료집 Vol.2001 No.1
Fantasy: - Plasma Equipment Modeling: qualitative prediction - Plasma Chemistry (2∼4 gas mixture): Electron impact cross sections, Heavy particle reaction rate constants. - Surface Phenomena: still almost unknown! Fact: - Qualitative calculation+several experiments: Enough to predict the plasma process results - No cross-sections, No surface physic? : Use experimental models - Current Values: Necessary for equipments, To find out optimum process window, To understand the problem sources, To generate a new equipment design (e.g. magnetron sputter), To extract the device circuit parameters,
Closed Circuit System 마취의 임상적 평가
신양식,김종래,박광원,조정현,손영재 대한마취과학회 1988 Korean Journal of Anesthesiology Vol.21 No.1
With the increased conern regarding air pollution in the operatiog theatre and the gigh cost of vapor anesthetics, closed circuit anesthesia has much to commend it. Since the demise of flammable anesthetics such as diethyl ether and cyclopropane, closed circuit anesthesia has been applied infrequently. Ernst and Lowe recently establised a theoretic basis and reported quantitative data and a formula for closed circuit anesthesia. This involves frequent calculations to adjust the nitrous oxide flow and the vaporizer dials in accordance with the elapsed time. We attempted to evaluate their formula against our simplified method of adjusting only the N_2O flow according to the N_2O uptake rate calculated by Severinghaus. This method allows the output of the vapor from the plenum type vaporizer to diminish according to the decrease of N_2O flow. Eighty patients undergoing closed circuit anesthesia were randomly divided into 4 groups of 20 patients each follows: Group Ⅰ: Adjustment of the N_2O flow and the halothane vaporizer dial by elapsed time, according to Ernst and Lowe. Group Ⅱ: Adjustment of the N_2O flow and the enflurane vaporizer dial by elapsed time, according to Ernst and Lowe. Group Ⅲ: Adjustment of the N_2O flow only and fixed dial setting on the halothane vaporizer, calculated from the measured end-tidal concentration at 16 min. Group Ⅳ: Adjustment of the N_2O flow only and a fixed setting on the enflurane vaporizer, calculated from the measured end-tidal concentration at 16 min. The results were as follows: 1) In groups Ⅰ&Ⅱ, the inhalation anexthetic concentration decrased gradually and in 10 of 40 patients failed to maintain a satisfactory anesthetic condition after 50 minutes, requiring adjustment of the vaporizer dial setting. No failure occured in groups Ⅲ&Ⅳ. 2) There were no abnormal values for the inspired oxygen fraction or the end-tidal CO_2 tension at any time. 3) There were no significant differences between groups in the amount of a neuromuscular blocking agent, pancuronium, required. In conclusion, the method of closed circuit anesthesia when administer by adjusting only the flow of N20 and setting the vaporizer dial to a fixed point determined at 16 min may be convenient and efficacious. Attention to the patients safety can be maintained by the use of monitoring devices to measure the inspired oxygen fraction, the end-tidal CO_2 tension and vital signs even without monitoring the anesthetic vapor concentration.
Characteristics of Airborne Asbestos Concentrations after Asbestos Abatement in Schools in Seoul
Kwang-Rae KIM,Jai-Young LEE,Ji-Young LEE,Soo-Nye CHUNG,Sun-Jeong WON,Ji-Sung KIM,Ki-Kyo LIM,Jeong-Eun BAE,Ma-Rhan YANG,Seung-Mi KWON,Jin-Ho SHIN,Jun-Yeon LEE,Yong-Seung SHIN 한국유통과학회 2023 International Forum on Business Convergence (IFBC) Vol.2023 No.-
The expression of TLRs in pulmonary neuron in bleomycin induced pulmonary fibrosis model
( Won Jai Jung ),( Sue In Choi ),( Eun Joo Lee ),( Kyung Hoon Min ),( Gyu Young Hur ),( Seung Heon Lee ),( Sung Yong Lee ),( Je Hyeong Kim ),( Chol Shin ),( Jae Jeong Shim ),( Kwang Ho In ),( Kyung Ho 대한결핵 및 호흡기학회 2015 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.120 No.-
Background: The family of Toll-like receptors (TLRs) plays a key role in controlling innate immune responses to a wide variety of pathogen-associated molecules. Nerve cells originated from lung are considered to be related with clinical respiratory symptoms including coughing, dyspnea. However, investigation of TLRs in pulmonary nerve cells has scarcely studied. We investigated the expression of TLRs in pulmonary nerve cells and change of TLRs in bleomycin induced lung fibrosis model. Methods: Male Spraque-Dawley rats were given a single dose of bleomycin (2.5 mg/kg, intratracheally) in pulmonary fibrosis groups and saline in controls. Fibrotic changes in lung were estimated to occur by BAL, histology and SIRCOL collagen assay. Using real-time PCR, we assessed the expression of TLRs (TLR 1-9) in pulmonary neurons of bleomycin induced lung fibrosis rat model in comparson with normal controls. Results: Bleomycin challenge caused pulmonary fibrosis with increase in collagen content of lung tissue and typical histological findings. We showed strong expression of TLR-2, TLR-5 in pulmonary neuron of bleomycin fibrosis rats versus normal rats. Conclusions: The concerted alteration of expression of TLRs in pulmonary neurons can be of relevance for understanding the pathogenesis of lung fibrosis.
중소기업의 전략적 제휴의도에 영향을 미치는 요인에 관한 연구 : 대전 / 충청지역 중소 제조업체를 중심으로
박광일,강신철,전선규,김인재,송창석,남수현 한국중소기업학회 2000 中小企業硏究 Vol.22 No.1
This study investigates the antecedent variables that could affect the intention to participate in the strategic alliance in the context of small and medium-sized companies. The antecedent variables refer to the ones being external and internal to the company. The external variables include strength of competition, product life-cycle, economies of scale, and market stability in terms of inputs and outputs. The internal variables include the competitiveness of and individual company in terms of the overall unique competence, manufacturing capabilities, R&D capabilities, and marketing capabilities. Hypotheses were developed and tested for the small and medium-sized companies in Taejon and Choongchung area. It was found that the intention of strategic alliance was high when the companies were faced with a short product life-cycle, when they were in need to achieve economies of scale, and when they perceived to have unique competence, strong R&D capabilities, and weak marketing capabilities.