• 한국전통조경학회지
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• 제34권2호
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• pp.55-62
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• 2016

본 연구는 풍수이론으로 은평뉴타운을 분석하였다. 우선 주거지를 분석하기 위한 틀(천지인합일, 인지제의, 대환경상지분석, 소환경상지분석, 동선상지분석, 주거지조향분석)을 구성하였다. 그 틀로 은평뉴타운을 분석하였으며 결과를 보면 다음과 같다. 광역적으로 분석한 대환경상지분석에서 은평구는 서북향에 산세가 열려 있으므로 겨울 서북풍에 노출되어 불리한 풍수형국으로 나타났다. 소환경상지분석은 사신수형국 기준으로 1지구와 2지구를 구분하여 분석하였다. 분석한 결과 1지구는 배수임산으로 흉지(凶地), 2지구는 비보풍수인 실개천의 복원으로 배산임수의 길지(吉地)로 나타났다. 마지막으로 분석한 결과에 따라 비보풍수 방식을 적용하여 대상지를 길지로 보완하기 위한 대안을 제시하였다.

• 한국통신학회논문지
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• 제25권4A호
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• pp.481-488
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• 2000

The demands for mobile communication service are growing rapidly. In heavily populated areas, cell split is unavoidable to increase the capacity of the cellular system. Cell splitting makes a cellular system to have mixed cell sizes. For cell planning, it is necessary to analyze the reverse link capacity of a CDMA cellular system with mixed cell sizes. In this paper, we propose a method to calculate the reverse link capacity of a CDMA cellular system with mixed cell sizes. When a macro cell is split into three micro cells, as an example, we calculate the reverse link capacities for the three micro cells and the neighboring macro cells. The results show that as the radius of a micro cell decreases, the reverse link capacity of the micro cell increases, while those of the neighboring macro cells decrease.

• 한국복합재료학회:학술대회논문집
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• 한국복합재료학회 2005년도 춘계학술발표대회 논문집
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• pp.9-12
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• 2005

Recently, research on the morphing wing is an interesting issue to develop the capability of the wing such as improving the lift and reduction of drag during the operation of an aircraft by changing the wing shape from one configuration to another. A more efficient weight reduction of the wing using smart or morphing wing concept can be achieved in comparison with the conventional flaps. In this study, it is investigated the behaviors of the morphing wing using Macro Fiber Composite (MFC) actuators. Generally, MFC is the piezocomposite actuator with the rectangular PZT fiber and epoxy matrix, and uses the interdigitated electrode to produce more powerful actuation in the in-plane direction. Furthermore, it can produce the twisting actuation as compared with the traditional PZT actuators. In the formulation, the first-order shear deformation plate theory is used, and finite element method is adopted in the numerical analysis of the model. Results show the characteristics of the static behavior of the morphing wing according to the change of the actuation voltage.

• 한국통신학회논문지
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• 제27권3B호
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• pp.212-219
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• 2002

본 논문에서는 기지국에 스마트 안테나를 사용한 이동 통신 시스템에서 기지국 다이버시티를 고려하여 빔성형 가중치 결정 방법과 전력 제어 방법을 순방향 링크와 역방향 링크에 대해 제시하고 이를 Monte-Carlo 시뮬레이션 방법을 이용하여 확인하였다. 결과에 의하면 역방향 링크에서는 다이버시티 threshold가 증가함에 따라 즉, 이동국이 더 많은 기지국들과 링크함에 따라 셀의 용량이 증가하였다. 이와 반대로 순방향 링크에서는 다이버시티 threshold가 증가할수록 용량이 감소하는 것을 확인할 수 있었다. 본 논문의 결과는 스마트 안테나를 적용한 시스템의 효율적인 무선망 운용 방식 결정의 지표가 될 것으로 기대된다.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2001년도 하계종합학술대회 논문집(1)
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• pp.277-280
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• 2001

Due to the explosive popularization of the Internet, it has been researched for many mobile terminals how to receive various multimedia information. Especially, it has been considered that a mobile terminal is serviced with multimedia information through a inherent IP address. In this paper we have proposed the Handover Signaling Method and analyzed the Handover delay time of this proposed method in wireless section. This proposed method is appropriate to Broadband systems with Mobile IP. We have simulated Handover delay time with respect to the distance between a terminal and base stations

• Bulletin of the Korean Chemical Society
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• 제31권1호
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• pp.157-161
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• 2010

A sensory element against carbaryl, as a widely used pesticide was prepared based on adsorbed acetylcholine esterase (AChE) from Torpedo california. Octadecyl was substituted on macro-porous silica, confirmed by infra-red (IR) spectroscopy and quantitatively estimated through thermo-gravimetric analysis (TGA). Immobilization of the enzyme was achieved by adsorption on this support. Activity of the immobilization product was measured as a function of the loaded enzyme concentration, and maximum binding capacity of the support was estimated to be 43.18 nmol.mg-1. The immobilized preparations were stable for more than two months at storage conditions and showed consistency in continuous operations. Possible application of the immobilized AChE for quantitative analysis of carbaryl is proposed in this study.

• 대한기계학회논문집B
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• 제20권10호
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• pp.3361-3370
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• 1996

Micro-Macro approach is conducted for the mixture solidification to handle the closely linked phenomena of microscopic solute redistribution and macroscopic solidification behavior. For this purpose, present work combines the efficiency of mixture theory for macro part and the capability of microscopic analysis of two-phase model for micro part. The micro part of present study is verified by comparison with experiment of Al-4.9 mass% Cu alloy. The effect of back diffusion on the macroscopic variables such as temperature and liquid concentration, is appreciable. The effect, however, is considerable on the mixture concentration and eutectic fraction which are indices of macro and micro segregation, respectively. According to the diffusion time, the behavior near the cooling wall where relatively rapid solidification permits short solutal diffusion time, approaches Scheil equation limit and inner part approaches lever rule limit.

• 한국문헌정보학회지
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• 제53권3호
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• pp.5-23
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• 2019

본 연구는 한국의 공공도서관 예산결정에 영향을 미치는 거시환경과 미시환경의 속성이 무엇인지를 실증적으로 살펴보았다. 이를 위해 본 연구에서는 2017년도의 167개 지방자치단체 공공도서관 예산액을 종속변수로 활용하였고, 공공도서관 해당지역의 거시 및 미시환경 데이터를 독립변수로 활용하였다. 연구결과 공공도서관 예산결정에 영향을 미치는 거시환경 요인으로 대도시 여부, 교육정도, 청소년 인구 속성이 유의미한 분석결과를 보였다. 아울러, 미시환경 요인으로 이용자수, 사서수, 장서수의 속성이 유의미한 분석결과를 보였다.

• Advances in aircraft and spacecraft science
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• 제10권1호
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• pp.83-106
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• 2023

In this work, the static behavior of FGM macro and nano-plates under thermomechanical loading. Equilibrium equations are determined by using virtual work principle and local and non-local theory. The novelty of the current model is using a new displacement field with four variables and a warping function considering the effect of shear. Through this analysis, the considered sandwich FGM macro and nanoplates are a homogeneous core and P-FGM faces, homogeneous faces and an E-FGM core and finally P-FGM faces and an E-FGM core. The analytical solution is obtained by using Navier method. The model is verified with previous published works by other models and very close results are obtained within maximum 1% deviation. The numerical results are performed to present the influence of the various parameters such as, geometric ratios, material index as well as the scale parameters are investigated. The present model can be applicable for sandwich FG plates used in nuclear, aero-space, marine, civil and mechanical applications.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 1993년도 사면안정
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• pp.1-18
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• 1993