• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.48-53
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• 2002

가. 작업단계 별 작업수단 및 노동투하시간 -고추재배는 포장준비 등 일부작업을 제외하고는 인력작업에 의존하고 있으며, 육묘에서 수확 및 수확후 포장처리가지의 총 노동투하시간은 266.7시간/10a로 수확작업이 44.5%로 많았으며, 다음으로 육묘, 지주세우기 및 제거, 정식, 방제 순으로 나타났다. 따라서 노력 및 생산비절감을 위해서는 고추재배 기계화가 시급한 것으로 판단된다. 나 일관기계화방안 -고추재배시 기계화를 저해하는 요인으로는 경지규모의 협소함, 재배지의 필지의 분산, 협소한 조간간격, 비닐멀칭 및 지주유인재배, 수확기간의 길이가 길고 횟수가 많음 등으로 나타났으며, 기계화가 곤란한 것으로 나타났으며, 고추재배일관기계화를 위하여는 공동 또는 공정육묘, 트랙터 등 대형기계중심의 포장준비, 정식은 자동정식기보급, 관수·시비자동화와 붐방제기 또는 방제장치시설화, 기계수확이 되어야할 것으로 판단되었다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.472-474
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• 2004

In this study, we investigated the characteristics of the input impedance and the gain of a ‘Folded dipole antenna with stub’ by the Method of Moments. The center frequency in this study is 200MHz, the radius of wire is 0.5nm, and the distance between two linear dipoles is 2cm. The inside variation of stub length within 18cm and the outside variation of stub length 4.5cm ive the value of SWR(Standing Wave Ratio) within 3. This means that the impedance matching between the ‘Folded dipole antenna with stub’ and receiver can easily be performed without a supplementary matching circuit.

• The Korean Journal of Applied Statistics
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• v.11 no.2
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• pp.205-219
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• 1998

Statistical analyses have been perf7rm7d to find factors affecting chronic renal allograft dysfunction for 114 renal transplanted patients. Renal function was evaluated using serum creatinine values every three months during 1 year to 5 years after transplantation. Statistical models for the repeated measures were considered to evaluate factors affecting the reciprocal of serum creatinine values. This paper focuses on some common problems on the choice of correlation matrices occurred in the analysis of repeated measures.

• Proceedings of the KAIS Fall Conference
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• 2007.11a
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• pp.259-261
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• 2007

본 논문에서는 DWDM용 광필터를 설계하기 위하여 광섬유 다층 슬래브 도파로에 결합시킨 형태의 광섬유/다층 슬래브 결합구조의 광필터를 제안하였다. 광섬유와 슬래브의 분리간격이 $3{\mu}m$일 때 제안된 광필터는 $1.3{\mu}m$의 통신창에서 편광 독립성은 32nm로서 TM 모드와 TE 모드에 대해 중심파장이 각각 $\lambda_0=1.274755{\mu}m$와 $\lambda_0=1.30591{\mu}m$일 때 0.1 nm의 FWHM(Full Width at Half Maximun) 특성을 가진다.

• Asia Marketing Journal
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• v.9 no.3
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• pp.187-208
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• 2007

본 사례는 국내 최대 화장품 기업인 아모레 퍼시픽의 프리미엄 한방화장품인 설화수 브랜드의 탄생과 발전과정을 소재로 하고 있으며, 설화수의 브랜드 정체성 확립 전략과 글로벌 전략에 대해 다루고 있다. 설화수는 아모레 퍼시픽의 오랜 생약 화장품 연구의 결과로 탄생한 제품으로 현재 한방 화장품시장의 60%를 차지하고 있는 시장지배자일뿐 아니라 아모레 퍼시픽이 강력한 외국 기업들을 제치고 1위의 프리미엄 화장품 공급자로 등극하게 한 일등 공신이다. 설화수 브랜드는 시의 적절한 제품 컨셉과 탁월한 브랜드 정체성 확립으로 오늘과 같은 위치에 이를 수 있었으며, 문화 마케팅이라는 설화수의 브랜드 정체성과 잘 조화된 전략을 통해 후발 경쟁자들과의 간격을 더욱 크게 벌려 놓았다. 국내의 경쟁과 성공에 안주하지 않고, 글로벌 전략을 선택한 아모레 퍼시픽은 아시아 권을 중심으로 세계시장에서 괄목할 만한 성장을 이루었으며, 더 나아가 설화수는 아모레 퍼시픽의 프리미엄 브랜드로의 포부를 담고 2004년 홍콩에 진출한다. 잘 준비된 브랜드 구축 계획과 4P 전략으로 초기 안정된 시장안착을 달성하고 빠르게 성장하고 있는 설화수이지만, 국내와는 다른 낮은 경쟁기반과 국내에서 성공한 전략의 실행여부 등 새로운 도약을 위한 고민이 계속되고 있다.

• Proceedings of the Korea Information Processing Society Conference
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• 2008.11a
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• pp.1130-1133
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• 2008

데이터 중심 발간-구독 방식의 DDS 에서 특정 시간 및 일정 시간 간격으로 발생하는 이벤트를 처리하기 위한 타이머 모델을 쓰레드풀 기반으로 구현하였으며, 기존 병행처리 모델과 문제점을 제시하고, 제안한 모델의 구조 및 동작 방식에 대하여 제시하였다. 타이머 서비스를 지원하기 위해 사용된 각 클래스의 기능 및 구현을 통해서 연성 실시간 이벤트 처리가 가능한 타이머 모델을 어떻게 구현하였는지 제시한다.

• Journal of the Korean Association of Geographic Information Studies
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• v.13 no.2
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• pp.119-132
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• 2010

In this study, 2-dimensional inundation analysis for Taehwa watershed in Ulsan metropolitan city was conducted to analyze flow behaviors, inundation depth and inundation stage, considering the building effect. Lidar having the interval of 1 m was employed to generate topographic data with 10m interval, and building data extracted from digital map was combined with the constructed topographic data for 2-dimensional inundation analysis. A few scenarios were constructed for the analysis to provide an effective and accurate inundation analysis method through analyzing the results. The disagreement based on the areas of inundation showed over 10% between the cases with and without consideration of building effect. The maximum inundation depth without considering the effects of buildings was 0.29m higher than that with considering the building effects. On the contrary, the maximum inundation stage with consideration of building effects was 0.49m higher than that without consideration of building effects.

• Journal of the Institute of Electronics Engineers of Korea SP
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• v.42 no.1
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• pp.109-117
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• 2005

Range and velocity measurement algorithm is a procedure for estimating the accurate target position by using matched filter outputs equally spaced both in range and doppler frequency domain. Especially, in measurement algorithm for multi-function radar, it is necessary to consider processing time as well as accuracy in order to track multi-targets simultaneously. In this paper, we analyze range and velocity measurement algorithm using discriminator estimation method which is a technique applied to angle measurement of monopulse radar. The applied method required constant processing time for estimation can be used in multiple target tacking. But, it is necessary to consider measurement accuracy because of using minimum channel outputs for estimation. In the simulation, we show that the applied method is superior to the traditional gravity center measurement algorithm with respect to the accuracy performance and also analyze the characteristics of the proposed technique by calculating RMS error level as the processing parameters such as pulse width , channel step, etc. change.

• Journal of the Korean Geotechnical Society
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• v.17 no.6
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• pp.5-14
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• 2001

This paper describes a simplified design method of stabilizing piles based on an experimental tests and an analytical study which can take into account the safety factor of slope and pile spacing. The nonlinear characteristics of the soil-pile interaction for stabilizing piles are modeled by using load transfer method. The interaction factors due to pile spacing and cap rigidity were estimated by using a three dimensional nonlinear finite element approach and laboratory tests. Based on the results obtained, the interaction factors are proposed quantitatively for one-row pile groups with spacing-to-diameter ratios varying far 2.5 to 7.0. The Bishop's simplified method of slope stability analysis is extended to incorporate the soil-pile interaction and determine the safety factor of the reinforced slope. Through the comparative study, it is found that the prediction by present approach is in relatively good agreement with the results of centrifuge tests and field tests and three dimensional finite element analyses.

• Journal of Energy Engineering
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• v.2 no.3
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• pp.251-257
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• 1993

The purpose of this study is to obtain an improved interpretation of heat transfer phenomena between blocks and fluids in the parallel conducting plates. Flow is two-dimensional, incompressible steady laminar flow over rectangular blocks, representing finite heat source on parallel plate. Heat transfer phenomena, temperature of blocks and heat transfer into the flow field are investigated for different spacings between blocks and Reynolds numbers. Results indicate that Nusselt number on the far upstream corner of the block was higher than that of any part of the block. As Reynolds number and spacings of blocks increased, Nusselt number increased. The distribution of local Nusselt number on the top surface of the conducting plate is similar to the case with insulated plate. Temperature of the block which has heat source in half cubage was approximately twice as high as temperature of the block which has heat source in whole cubage. As Reynolds number and spacings of blocks increased, overall temperature decreased. The peak value of block temperature occurred at position shifted to the right or upper right from center. The maximum temperature of block can be expressed as a function of Reynolds number, spacings between blocks, position of maximum temperature of each block and then it is possible to predict the maximum temperature of blocks.