• Journal of architectural history
• /
• v.1 no.2 s.2
• /
• pp.137-148
• /
• 1992

I have focused my study on the comparative analysis between 'Sacrestia Vecchia (Old sacresty)' and 'Sacrestia Nouva (New sacresty)' of San Lorenzo in Firenze. One is designed by F. Brunelleschi and the other is designed by B. Michelangello on the base of similar program and context. The analytic study has led me to the following conclusions: First. two saresties take concrete shapes by organizing the classcal vocabularies on the elementary forms. Second, though Michelangelo has started Bruneleschi's sacresty, he gives a more concrete form by the heightening the section. Third, the transformation of entrance and aediclues show that Michelangelo designed the new sacresty on the creative interpretation of the classical vocabulary and the context.

• The Journal of Asian Finance, Economics and Business
• /
• v.1 no.1
• /
• pp.15-21
• /
• 2014

This study investigates extensively the integration of various segments of financial markets (i.e. money market, lending and deposit market, exchange rate market, and capital market) both domestically and internationally. Cointegration approach is employed in the study to find out long term relationship among the variables. Data are on a monthly interval for the period spreads over 2001 to 2010. The results show no evidence of cointegration between money market and exchange rate market and between capital market and exchange rate market of Pakistan. On the other hand, international financial markets integration is also investigated and the findings revealed that domestic money market rates of Pakistan and USA are not cointegrated. Whereas, an evidence of cointegration between capital markets of Pakistan and USA is found in this study.

• Korean Journal of Microbiology
• /
• v.29 no.6
• /
• pp.345-352
• /
• 1991

A serine proteinase of molecular weight 60 kd was purified from culture supernatant of P. aeruginosa using DEAE-Trisacryl M ion-exchange and AcA 54 gel filtration column chromatography, and the properties of serine proteinase were characterized. By means of SDS-polyacrylamide gel electrophoresis, the molecular weight of the enzyme was 55 kd. The optimal pH for the activity of purified enzyme was 7.5. The activity of the purified enzyme was completely inhibited by Di-isopropylfluorophosphate(DFP) and N-.alpha.-p-tosyl-L-lysine choloromethyl detone(TLCK) but not by other proteinase inhibitors such as E-64, pepstatin A, 1, 10-phenanthroline. The purified enzyme was capable of degrading type I and type IV collagen. Antisera obtained from hymans infected with Pseudomonas aeruginosa reacted to the purified serine proteinase in immunoblots. These results indicate that the purified enzyme is trypsin-like serine proteinase and this enzyme of P. aeruginosa may play an important role in tissue damage as a spreading factor and may be useful for serodiagnosis of Pseudomonas infections.

• Explosives and Blasting
• /
• v.8 no.3
• /
• pp.3-13
• /
• 1990

First ot of all, under given condition such as bit gage of 36mm Drill bit with right class of jack-leg-experimental test carried out from two face of Bench, firing of each hole brought 90 degree Angle face and them measured length of Burden and charged ammount of powder as following. $ca=\frac{A}{SW}$ A=Activated Area A=nd i=m S=Peripheral length of charged, room Ca=Rock Coeffiecency d: di=Hole diameter When constructed subway of Seoul in 1980 the blasting works increased complaint of ground vibration, in order to prevent the damage to structures. Some empirical equations were made as follows on condition with Jackleg Drill (Bit Gage 36mm) and within 30 meter distance between blasting site and structures. $V=K(D/W)^{-n}$ N=1.60 - 1.78 K= 48 - 138 Project is one of contineous works to above a determination of empirical equation on the cautious blasting vibration with Crawler Drill (70-75mm) in long distance. $V=41(D/\sqrt[3]{W})^{-1.41}$ $30m\le{D}\le{100m}$ $V=124(D/\sqrt[3]{W})^{-1.66}$ $100m\le{D}\le{285m}$.

• Transactions of the Korean Society of Automotive Engineers
• /
• v.12 no.5
• /
• pp.66-72
• /
• 2004

In this study, the effects of oxygen component in fuel and exhaust gas recirculation(EGR) method on the exhaust emissions has been investigated for a D.I. diesel engine. It was tested to estimate change of exhaust emission characteristics for the commercial diesel fuel and oxygenate blended fuel which has five kinds of blending ratio. Dimethoxy methane(DMM) contains oxygen component 42.5% in itself, and it is a kind of effective oxygenated fuel for reduction of smoke emission. It was affirmed that smoke emission was decreased with increasing of DMM blending ratio. But, NOx emission was increased compared with commercial diesel fuel. It was needed a NOx reduction counterplan that EGR method was used as a countermeasure for NOx reduction. It was found that simultaneous reduction of smoke and NOx emission was achieved with DMM blended fuel and cooled EGR method(1015%).

• Transactions of the Korean Society of Automotive Engineers
• /
• v.7 no.7
• /
• pp.94-103
• /
• 1999

A model for the prediction of combustion and exhaust emissions of DI diesel engine has been formulated and developed . This model is a quasi-dimensional phenomenological one and is based on multi-zone combustion modelling concept. It takes into consideration, on a zonal basis ,detailed of fuel spray formation, droplet evaporation, air-fuel mixing, spray wall interaction, swirl , heat transfer, self ignition and burning rate . The emission model is considered with chemical equipment , as well as the kinetics of fuel. NO and soot reactions in order to calculate the pollutant concentrations within each zone and the whole of cylinder . The accuracy of prediction versus experimental data and the capability of the model in predicting engine heat release, cylinder pressure and all the major exhaust emissions on zonal and cumulative basis., is demonstrated. Detailed prediction results showing the sensitivity of the model bv various injection rates are presented and discussed.

• Proceedings of the Membrane Society of Korea Conference
• /
• 2003.07a
• /
• pp.33-36
• /
• 2003

This research was aimed at developing new catalytic membrane reactors to be used for : i) partial oxidation of toluene (to benzaldehyde and benzoic acid) ii) oxidative dehydrogenation of propane iii) complete oxidation of propane and toluene. The reactor is particularly useful for the optimisation and the industrial development of heterogeneous catalytic processes, particularly for those processes where it is necessary to control the reactants stoichiometry in the reaction zone. This control limits consecutive reactions, thus obtaining high selectivity with industrially interesting conversions. This presentation will concentrate on the partial oxidation of toluene.

• Ceramist
• /
• v.21 no.1
• /
• pp.98-111
• /
• 2018

The lead-based perovskite (CH3NH3PbI3) material has a high molar coefficient, high crystallinity at low temperature, and long range of balanced electron-hole transport length. In addition, PCE of perovskite solar cells (PSCs) has been dramatically improved by over 22% by amending the electronic quality of perovskite and by using state-of-the-art hole transporting materials (HTMs) such as tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) due to enhanced charge transport toward the electrode via properly aligned energy levels with respect to the perovskite. Replacing the spiro-OMeTAD with new HTMs with the desired properties of appropriate energy levels, high hole mobility in its pristine form, low cost, and easy processable materials is necessary for attaining highly efficient and stable PSCs, which are anticipated to be truly compatible for practical application. Furthermore, Recently Pb-free perovskite materials much attention as an alternative light-harvesting active layer material instead of lead based perovskite in photovoltaic cells. In this work, we demonstrate a Pb-free perovskite material for the light harvesting and emitter as optoelectronic devices.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2002.05a
• /
• pp.106-108
• /
• 2002

SMPS는 스위칭을 통해 전력을 변환하므로 높은 dv/dt 및 di/dt 특성을 갖게 된다. 이러한 스위칭특성으로 인해 발생하는 EMI (Electromagnetic Interference) 노이즈는 기기 내부 또는 외부에 간섭을 일으킨다. 미국의 FCC (Federal Communications Commission) 및 유럽 의 CISPR(International Special Committee on Radio Interference) 등의 규정을 만족시키기 위해서 전도성 노이즈에 대한 충분한 이해와 해석이 필요하다. 본 연구는 SMPS에서의 EMI/EMC 대책 구현에 앞서, 전도성노이즈의 기본개념 및 발생/결합 경로를 분석하고 실제로 노이즈를 측정한다. 측정을 위해 Boost 컨버터가 제작/사용된다.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 1997.11a
• /
• pp.5-8
• /
• 1997

A study on the electrical conduction characteristics of the ultrathin organic films is one of the important factors for the development of molecular electronic devices. The Langmuir- Blodgett(LB) technique has recently been attracted interest as a method of the deposition ultrathin films. We hate fabricated N-docosyl N\`-methyl viologen-diTCNQ(DMVT) anion radical LB film and investigated the molecular orientation and electrical conduction characteristics. We have measured infrared transmission-reflection spectra. The alkyl chain is found to he well-ordered with the tilt angle of 13$^{\circ}$ with respect to the substrate surface normal and the TCNQ plane is tilted at 76$^{\circ}$ the surface normal. In ESR spectrum, we confirmed that a half-amplitude linewidth is clearly dependent on the incident angle, which indicates conducting species change. The in-plane conductivity of 31 lagers is approximately 1.33$\times$10$^{-6}$ S/cm. The ohmic behaviour was observed below 0.6 V, when current-voltage(I-V) characteristics was measured verically.