Mo 화학기상증착에 있어서 불순물 농도에 미치는 증착조건의 영향

배상석,서성교,홍은식,김승모,조미정,한혜정,이두성,김세훈,민석홍 국립7개대학공동논문집간행위원회 2001 공업기술연구 Vol.1 No.-

The thermal decomposition process of Mo(CO)_6 on chemical vapor deposition was investigated by analyzing the effects of deposition temperature, pressure, and reaction gas on the phase change of deposited films. Mo_2C was deposited at or below 350℃ due to the incompleteness of thermal decomposition of Mo(CO)_6, but Mo films was successfully deposited at 400℃ or higher temperatures. The variation of deposition pressure did not change the dependence of decomposition process on deposition temperature. The activation energy of surface reaction was 5.8 ㎉/mole.

Expansion Analysis of Subsea Pipe-In-Pipe Due to High Temperature and High Pressure Product

HAN­SUK CHOI(최한석),HYUN-MO SON(손현모),SI-YOUNG KIM(김시영) 한국해양공학회 2002 韓國海洋工學會誌 Vol.16 No.5

본 논문은 고온 고압의 유류 수송용 이중배관의 팽창에 대한 해석적 방법에 대한 결과고찰과 해석, 그리고 설계시 응용이 가능한 현상에 대해 논하였다. 고온의 유류수송시 온도를 유지할 목적으로 내부의 수송 배관과 외부의 케이싱 배관사이에 절연체가 쓰여진다. 이런 이중배관의 팽창을 조사할 수 있는 간단한 해석적 방법이 개발되었다. 본 논문에서는 온도의 분포, 압력, 토질의 저항, 수송배관과 케이싱배관과의 상호작용 등이 고려되어졌으며, 이 해석적 방법은 심해의 이중배관 해석에 적합하게 개발되었다. 계산의 결과 분석에서 고온의 영향이 고압보다 현저한 것이 밝혀졌다.

증발 표면적 증대를 위한 수적 분리기 특성에 관한 연구

모종근,공태우,이광영,정효민,정한식,서정세 경상대학교 해양산업연구소 2002 해양산업연구소보 Vol.15 No.-

The purpose of this research is to obtain the characteristics of water-vapor separator for improving the evaporative surface. The experimental system is constituted with water vapor generator, vapor storage tank, laser source for visualization and camera for photography. The efficiency of water-vapor separator can be varied by the kinds of the inside materials. Thus, in this report, we introduced the three kinds of materials with wire scrap, wire brush and sponge. As the experimental results, the wire brush was showed the best efficiency with 185 g/hr.

이중 게이트 MESFET를 이용한 M/W 광대역 귀환 증폭기 설계

박한규,양윤모 연세대학교 산업기술연구소 1981 논문집 Vol.13 No.1

In this paper a broadband MIC feedback amplifier was designed at X-band using the dual-gate GaAs MESFET. Microstrip line was used to match into a 50Ω input and output terminals on the substrate with relative permittivity (Er=2.3). In order to obtain broad bandwidth feedback system was designed and fabricated on the MIC. Especially scattering parameters, feedback elements, impedance matching and gain were calculated by CAD. Feedback circuit contained the feedback resistor, feedback inductor and drain inductor. The theoretical result (10.68 dB gain and 2.7 GHz bandwidth) could be obtained at center frequency (9 GHz). In the experimental result, 8.9 dB gain at 9 GHz and 1 GHz bandwidth were obtained and VSWR was 1.4

菊花 흰녹병균의 發生 樣狀, 小生子의 適正 形成溫度, pH 및 品種別 抵抗性

具漢謨 公州大學校 資源科學硏究所 1996 資源科學硏究論文集 Vol.4 No.-

Deree of incidences to white rust on chrysanthemum, effect of temperature, pH for sporidum formation by puccinia horinia and resistance of cultivars to typical disease were investigsted in the field and laboratory. 1.Degree of Incidences of white rust by puccinia horinia on chrysanthemum were progressed hightly virulence at May. 2.Sporidium formulation were developed at 5∼25℃ and pH 4.0∼8.5 after incubation. Optimum temperature and pH of formulation for sporidium were 20℃ and pH 7.0. 3.When 25 major cultivars were evaluated for their levels of resistance to damping off in the field, 7 cultivars including Weldon were showing high level of resistance and the low level of resistance were Spring Song, Arieta and Dax. The resistance cultivars to black spot were showing 7 including Westland Pink. Showing cultivars of the low level for resistance were Rose Queen and Spring Song. Resistance to brown spot were 8 cultivars including Westland Pink, and the low level for resistance were in other of Harliquine, Park Marble. Showing the resistance level for of micronutrient deficient were 13 cultivars including Westland Pink and Arieta were susceptive of the high level. Cold Resistance of flower were Harliquine and 6 the others. Cultivars, the high level of susceptible were in other of Spring Song, Rose Queen and Salmon.

大氣汚染이 飛行安全에 미치는 影響에 관한 硏究 : 화력발전소 연돌배출물을 중심으로 Based on a Pollutant of Thermal Power Station

양한모 한국항공대학교 1997 論文集 Vol.35 No.-

본 논문은 대기오염이 비행한정에 미치는 영향을 규명하기 위하여 화력발전소의 연돌(굴뚝)에서 배출되는 배출가스를 중심으로 배출물의 화학적 특성과 배출가스의 분산의 특성을 분석하고, 인천LNG복합화력발전소 건설(계획)이 인천국제공항에 미치는 영향을 배출가스 확산 수리모형을 통하여 분석하였다. 본 논문은 6장으로 구성되어 있으며 제1장에서는 서론, 제2장에서는 대기오염의 특성을 규명하고 제3장에서는 비행안정의 영향요인을 분석하였다. 제4장에서는 연돌배출물의 대기중 분산형태를 이론적으로 고찰하였으며, 제5장에서는 인천LNG복합화력발전소의 배출물이 인천국제공항에 미치는 영향을 분석하였다. 마지막으로 본 연구의 결과를 제시하였으며 이를 통하여 대기오염이 비행안전에 미치는 영향을 항공종사자들이 인식하는데 필요한 사랑을 제시하였다. The study has been conducted to determine dispersion characteristics of an air pollution affecting on the flight safety. In this paper, dispersion characteristics were investigated analytically and experimentally. The master plans of the HANWHA INCHON complex thermal power station was used for this paper. The study is organized into six parts. the first part presents the summary and a purpose of this study. The second part presents a characteristics of air pollutants and the third part involves the factors of flight safety. the fourth part analyzed the dispersion characteristics of combustion pollutants and the fifth part performed the cae study on the air pollution affecting on the flight safety. Finally this study is focused on providing for guidelines to airmen for the purpose of the flight safety especially with respect of air pollution.

ICAO체제에서의 다자간 항공자유화의 추진배경

양한모,이영혁,신홍균 한국항공대학교 1996 論文集 Vol.34 No.-

1944년 시카고 조약을 중심으로 운영되어온 ICAO체제는 각국의 영공주권원칙에 기초하고 있다. ICAO 체제하에서 각국은 자국내의 항공운송에 대한 통제권을 행사하여 왔고, 국가간의 항공운송은 해당 영공국가의 허가를 받아 이루어져 왔다. 특히 각국은 국제항공운송을 위해 당사국들간의 양자협정을 통해서 상호 항공운송권을 교차 허가하는 방식을 택하여 왔다. 그러나 최근에는 각국의 항공운송권을 더 이상 양자협정방식에 의해서 허용하는 것이 아니라, 다자간 협정에 의해서 허용함으로써, 각국의 항공운송시장을 자유화하는 것이 항공사의 이익과 여객의 편의 및 경제적 이익을 위해 필요하다는 주장이 강력히 제기되고 있다. 이는 미국 및 유럽을 비롯한 주요 선진국들의 항공정책에서도 어느 정도 수용되고 있는 추세이다. 이에 ICAO는 미래의 국제항공질서의 재편 차원에서 다자간 항공 자유화에 관한 수차례의 국제회의를 개최한 바 있으며, 현재 가장 바람직한 질서의 구축을 위한 의견을 수렴하고 있다. 본 연구는 다자간 항공자유화의 최근 동향을 분석하여 우리 나라의 국제항공정책의 수립을 위한 정책자료를 제공하고자 한다. 구체적으로 현재의 다자간 국제항공질서의 형성과정과 그 주요 내용을 정리하여, 향후 전개될 항공질서의 재편의 향배를 예측하고자 하였으며, 아울러 ICAO가 개최한 주요 국제회의에서 표명된 국제항공질서의 진로에 관한 전문가들의 의견과 각국의 국제 항공정책을 분석하고 있다. 또한 그러한 분석을 바탕으로 하여 우리나라의 대응방안에 관한 정책 제안을 담고 있다. The ICAO system established by the Chicago Convention of 1944 based upon the solemn recognition of the sovereign right of each State over air space, within which each State is entitled to have the right of controlling air transport within his own territory. This made the bilateral air transport agreement between each State be a common legal form of allowing air transport right to the carriers of the other side. However, multilateral approach for liberalizing the world air transport market is strongly put forward around aviation community. It is claimed that multilateral agreement is a better form of assuring the interest of air carriers as well as passengers than bilateral agreement. Some major powers, such as U.S.A. and member of European Union, have shown their positive attitude toward that approach. In such context, The ICAO has convened recently a few international conference. Taking into consideration such recent development in this field, we illuminate the formation and status of current international air transport order, and analyze the major States' air transport policy in order to allow more reliable prevision of future development.

^152Sm에서의 다중극 혼합비에 관한 연구

정원모,주관식,황한렬,정원균 연세대학교 자연과학연구소 1986 學術論文集 Vol.17 No.-

동일한 선원에 대한 감마-감마, 감마-내부전환전자 각상관관계 실험을 통하여 변형핵인 ^152Sm의 혼합비(δ)와 121.8keV전이의 내부 전환전자 입자매개변수(b_2)를 결정하였다. 감마선을 검출하는데는 두대의 Ge(Li)검출기를 내부전환전자를 검출하는 데는 표면장벽형검출기를 사용하였다. 실험을 통하여 다음과 같은 결과를 구하였다. 244.7 keV-121.8 keV ; δ =-0.012±0.007 688.6 keV-121.8 keV ; δ =17.4±3.01 964.0 keV-121.8 keV ; δ =9.51±1.93 1112.0 keV-121.8 keV ; δ =12.30±2.05 1408.0 keV-121.8 keV ; δ =0.16±0.07 964.0 keVγ-121.8 keVe_K ; b_2=1.66±0.26 1408.0 keVγ-121.8 keVe_K ; b_2=1.63±0.10 1408.0 keVγ-121.8 keVe_L ; b_2=0.99±0.13 혼합비는 PPQ(Pairing-Plus-Quadrupole)모델과 IBA(Interacting-Boson-Approximation)모델로부터 얻은 이론값과 비교하여 보았고 또한 입자매개변수값이 이론값과 큰 차이가 있는 것으로 보아 변형핵의 저에너지 E_2 전이에서 ‘anomaly’가 있는 것으로 추정된다. The mixing ratios (δ) and the internal conversion electron particle parameters (b_2) of the 121.8keV transition in deformed ^152Sm nuclei were determined by comparing the γ-γ and γ-e angular correlation measurements made with the same source. The experimental apparatus was constructed with a surface barrier detecter for electrons and two Ge(Li) detectors for gamma rays. The following results were obtained. 244.7 keV-121.8 keV ; δ =-0.012±0.007 688.6 keV-121.8 keV ; δ =17.4±3.01 964.0 keV-121.8 keV ; δ =9.51±1.93 1112.0 keV-121.8 keV ; δ =12.30±2.05 1408.0 keV-121.8 keV ; δ =0.16±0.07 964.0 keVγ-121.8 keVe_K ; b_2=1.66±0.26 1408.0 keVγ-121.8 keVe_K ; b_2=1.63±0.10 1408.0 keVγ-121.8 keVe_L ; b_2=0.99±0.13 The results are compared with the theoretical values derived from the Pairing-Plus-Quadrupole model and from the Interacting-Boson-Approximation model, and an 'anomaly' was found in the low-lying E_2 transition for deformed ^152Sm nuclei.

Pulse Power를 이용한 혐기성 소화 효율 증대

최한나,전용우,정윤진,홍승모 대한상하수도학회 2003 상하수도학회지 Vol.17 No.3

Anaerobic digestion is commonly used in wastewater treatment plants to stabilize sludge produced in primary and secondary treatment, to produce renewable energy as methane, and to reduce the volume of solids for ultimate disposal. Previous studies on anaerobic digestibility of primary and secondary sludge present that secondary sludge showed poor anaerobic digestibility and less gas production. The objectives of this research were to study the effects of pulse power pretreatment on anaerobic digestibility of waste activated sludge. These objectives were achieved through operation of carefully-controlled laboratory digesters under various conditions. The conclusion made from this study are as follows: 1) To maximize the efficiency of pulse power pretreatment for waste activated sludge, the optimum operation conditions for coaxial reactor with 7 rings are decided as follows; a) optimum pulse repetition rate : 110㎐, b)feeding service : once-through mode, c) optimum hydraulic retention time : 1.0-1.5sec 2) Pretreated WAS by pulse power system showed increase of SCOD, ECP, and V.A by 13.6, 4.6, and 7.1 times. 3) From the results from operation of lab scaled anaerobic digester, pulse power sludge pretreatment increased GPR from 0.39㎥gas/㎏VS_add · day to 0.66㎥gas/㎏VS_add · day and methane content from 43.9% to 87.9%. Thus, increase of methane production rate was increased by 3.4times. 4) During the steady state operation of anaerobic digester, the removal efficiency of TCOD and VS were improved by 44.6% and 31.5% respectively after pulse power pretreatment of waste activated sludge.

초우량운송기업의 서비스전략에 관한 연구 : 항공운송기업을 중심으로 Based on Airlines

양한모 한국항공운항학회 1998 한국항공운항학회지 Vol.6 No.1

The study proved the fitness between competitive strategy and service operation strategy of service companies. The competitive strategy of a corporation is a major strategy playing the role of bridge linking both corporate strategy and functional strategy. And it is a choice of method how to win competitors in given area. There have been such a specific methodologies for acquiring competitive advantage as Porters competitive strategy, Miles and Snows adaptive strategy, and Life cycle strategy. But, many scholars have pointed that its more important for high corporate performance to determine the competitive strategy of a corporation fitting the external environment and internal structure. So its needed for successful cost-leadership or differentiation strategy to differentiate organizational function, resources, and various organizational factors. But there have been no methodologies or practical guidelines fitting competitive strategy, corporate structure, and external environment in sprite do service corporations growth. So, the study proved the fitness between competitive strategy and service operation structure in Airlines after selecting service structural elements necessary for strategic management.