• The Korean Journal of Financial Management
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• v.10 no.2
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• pp.239-262
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• 1993

본 연구에서는 한국 주식시장에서의 주가결정과정에 비합리적인 요소가 내포되어 있는지의 여부를 정가하기 위하여 Fama-French(1988)의 검증방법론을 이용하여 한국종합주가지수, 자본금규모별 주가지수, 산업 별 주가지수, 그리고 한경다우지수 등을 대상으로 실증분석을 실시하였다. 주가의 평균회귀과정(mean-reverting process)이 주식수익률들간의 음의 자기상관관계를 유발한다는 관찰에서 출발한 본 연구는 미국에서의 실증분석 결과와는 판이하게 주식수익률들이 2년까지의 수익률계산기간(return horizon)에서 지속적인 양의 자기 상관을 갖고 있음을 발견하였다. 본 연구에서 발견된 실증분식결과는 대상주가지수에 관계없이 일관성있는 패턴을 유지하고 있는데, 이는 Fama-French(1988)의 결과에 정면으로 배치된다. 따라서 본 연구에서의 실증분석 결과는 우리나라 주식시장의 경우 주가에 비합리적인 평균회귀요소(mean-reverting components)가 포함되어 있다는 가설을 지지하지 않는 것으로 해석 될 수 있을 것이다. 물론, 이것이 반드시 우리 주식 시장에서의 주가결정이 합리적으로 이루어진다는 것을 의미하지는 않으며, 단지 본 연구에서 주장되고 있는 것은 우리 주식시장에서의 주가결정과정을 랜덤웍과 평균회귀과정의 합성 혹은 평균회귀과정 그 자체로 모형화하려는 시도는 실증적 증거에 뿌리를 두고 있지 않다는

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.7 no.1
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• pp.15-25
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• 1996

This paper proposes the modified image method scheme to search the reflected points and the method to calculate the number of rays. These methods are applied to the ray tracing technique for received power and delay profile prediction in microcelular environment. With ray tracing model using these methods, we show the simulated results for various environmental structures. To demonstrate the validity of this approach, these simulated results are compared and analysed with measured results in apartment towns along the street. In addition we proposed the optimum number of multipath rays with the results in microcellular environment.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2004.11a
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• pp.239-244
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• 2004

Large-scaled apartment housing complex at outskirts of downtown which has direct influence on urban view concentrated on improving the space outside the complex like spatial composition of individual plan design, but neglected the contribution of urban view. However, as people's orientation toward urban areas was changed to quality from quantity, concerns on urban view have been gradually increased and planning of apartment housing has been extended to complex with view contributing to urban people as a factor composing the city in resident centered spatial composition. This study is therefore to examine the characteristics of view components of 13 apartment housing complexes at Sangmu District in Gwangju Metropolitan City and their influences on evaluating view image.

• Journal of the Korean housing association
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• v.22 no.2
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• pp.83-90
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• 2011

This research analyzes the residents' satisfaction for the pedestrian space of multi-family housing based on quality index. For this purpose, nine apartment complexes which were built after 2000, are selected and examined by user characteristics of composition factors of pedestrian space. This research also compares residents' satisfaction by evaluation factors of walking environment. The resident survey reveals that the composit type of apartment gives the highest satisfaction to residents followed by a courtyard type, and a straight type the last. In particular, residents show high satisfaction to pedestrian-only space in the case of the composit type of apartment building. The most important factor of walking environment on residential satisfaction is the separation of car and pedestrian path of main entrance. Above all, suitability of construction laws and regulations should be reviewed for safer and more amenable walking environment.

• Journal of the Korean Professional Engineers Association
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• v.46 no.2
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• pp.36-43
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• 2013

풍력발전단지의 운영으로 인한 주된 소음은 풍력발전기의 고체음과 바람을 가르는 마찰 기류음으로 대별된다. 본 원고(原稿)에서는 소음레벨을($L_{PAN}$) 정량적으로 예측, 계산하는데 이용하는 소음예측식을 풍력발전에 맞게 이론적으로 해석하고, 소음발생원의 특성을 분석하여 운영시 소음영향 및 저감방안을 검토하였다. 풍력발전 사업계획시 소음예측식과 소음모델링(CadnaA version4.1, SoundPLAN version7.0 해석 결과 등)을 이용한 예측결과를 서로 비교 검토하고, 운영시(사후환경영향조사 등) 실제 소음레벨과 소음예측 결과를 서로 비교분석하여 데이터를 축척하길 바란다. 제언한 소음저감방안이 불충분한 경우 발전기의 배치와 설치간격, 발전기종 및 발전용량, 설치장소의 재선정 등을 추가 검토할 필요가 있다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2020.11a
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• pp.36-38
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• 2020

해상 ICT의 발전과 e-Navigation 도입 및 자율운항선 도입에 따라 해상 통신망의 종류와 범위가 확장되고 있고 디지털 항로표지 서비스의 필요성이 증가하고 있다. 어선원의 고령화, 해안 배후 단지의 발전에 의한 배후광, 기상여건 및 진보된 선내 항해 장비 사용 미숙 등으로 항로표지의 시각적·전자적 인지력이 저하되어 선박 안전 운항이 담보하기 어려운 상황에서 선박의 운항 상황 및 주변 해역 운항 상황·지리적 여건을 고려한 맞춤형 가상 디지털 항로표지 서비스는 항로표지의 전자적 식별을 용이하게 하고 안전 운항 유도 서비스로 해양 사고 예방에 도움이 될 것이다. 본 연구에서는 자율운항선 대응을 위한 디지털 항로표지 서비스 및 선박 운항 상황·지리적 여건을 고려한 적극적인 맞춤형 가상 디지털 항로표지 서비스 시스템의 설계방안을 제시하였다.

• Journal of Environmental Impact Assessment
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• v.30 no.3
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• pp.141-154
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• 2021

In this study, the effect of the restoration of Yaksa stream and the construction of an apartment complex by the urban renewal project in the Yaksa district of Chuncheon on air quality in the surrounding area was evaluated using computational fluid dynamics (CFD) model simulations. In orderto compare the impact of the project, wind and pollutant concentration fields were simulated using topographic data in 2011 and 2017, which stand for the periods before and after the urban renewal project, respectively. In the numerical experiments, the scenarios were set to analyze the effect of the construction of the apartment complex and the effect of stream restoration. Wind direction and wind speed data obtained from the Chuncheon Automated Synoptic Observing System (ASOS) were used as the inflow boundary conditions, and the simulation results were weighted according to the frequencies of the eight-directional inflow wind directions. The changes in wind speed and NO_X concentration distribution according to the changes in building and terrain between scenarios were compared. As a result, the concentration of NO_X emitted from the surrounding roads increased by the construction of the apartment complex, and the magnitude of the increase was reduced as the result of including the effect of stream restoration. The concentration of NO_X decreased around the restored stream, while the concentration increased significantly around the constructed apartment complex. The increase in the concentration of NO_X around the apartment complex was more pronounced in the place located in the rear of the wind direction to the apartment complex, and the effect remains up to the height of the building. In conclusion, it was confirmed that the relative arrangement of apartment complex construction and stream restoration in relation to the main wind direction of the target area was one of the major factors in determining the surrounding air quality.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2009.11a
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• pp.104-108
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• 2009

Rapid urbanization resulted in expansion of urban area and increase of population bringing deepened housing shortage. Supply-oriented housing policy made apartment a representative residential space in Korea in spite of the short history of apartment. This study analyzed the shape and arrangement of main building by year and the microclimate in the complex depending on the number of floors. The purpose of this study was to present the basic data in developing apartment complex to solve problems like the stagnation of pollution source and the rise of temperature due to the declined ventilation in apartment complex, and the worsened urban heat island phenomenon due to the impeded flow of wind. This study rearranged the shape and arrangement of main building by year and the tendency of the number of floors by year in the process of change, by generalizing the process of change of apartment complex, a representative modern residential space through preliminary research. Based on it, 8 object lot by age was selected and simulated by using Envi-met. Simulation identified that the change of apartment complex takes place having a positive effect on microclimate in the apartment complex and the microclimate in the apartment complex is influenced a lot by the shape of complex. If in future apartment complex plan, a systematic legal criteria of design is made about the shape and arrangement of main building, it might have a positive effect on the improvement of microclimate in the apartment complex, a representative residential space in Korea.

• Journal of Korean Library and Information Science Society
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• v.39 no.2
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• pp.429-448
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• 2008

The number of public libraries is not good enough in Korea. The main reasons why there are not many libraries are: the lack of people's recognition of necessity and importance of public libraries, stingy investment by the central and local governments for building public libraries, and no policy on effective building of public libraries. Now, there should be a policy on building and operating small-size public libraries that the developed country adopts. Redevelopment of local areas and reconstruction of old apartment complex are the best chance of building small-size libraries in those areas. The apartment complex in which this study took place is going to be reconstructed in the near future. A small-size library can be built with a district office and a post-office as a multi-complex building. Building a small-size library with public institutions or business buildings in the place of redevelopment of local areas and reconstruction of old apartment complex is one of the best solution of solving the lack of public libraries in Korea.

• KOMUNHWA
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• no.59
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• pp.64-87
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• 2002

The Burial of the living with the dead in Yeongnam Region began to appear between the late 3rd and the early 4th centuries when dramatic social changes, such as the emergence of fortresses, stoneware, and the division of Gyeongju style and Gimhae style ou