• Architectural research
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• 제15권3호
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• pp.159-166
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• 2013

This study was aimed at analyzing the three-step seismic performance evaluation procedure of Korea Infrastructure Safety Cooperation and proposing a new procedure suitable for unreinforced masonry buildings in Korea. For the study, it was investigated the performance evaluation results of five example URM buildings. First of all, it was found that the performance evaluation procedure for the URM buildings should be different from that for the other structural systems. As a result, a simple procedure of seismic performance evaluation was proposed, which includes elimination of elastic and inelastic push-over analysis and reduction of performance levels and evaluation steps. With the simple procedure, the URM buildings could be evaluated more easily than the other structures. It would be expected that the procedure can provide structural engineers with a simple and easy way to evaluate the seismic performance of the Korean URM buildings. Nevertheless, the procedure must be revised continuously by reflecting new research products for the URM buildings in Korea.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2015년도 춘계 학술논문 발표대회
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• pp.105-106
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• 2015

As the Long-life certification system is recently introduced in the Housing Law in Korea, it is expected that an application of the lightweight wall panel will be increased in apartment construction as the main wall system. However, the performance criteria for lightweight wall is in the early phase of its action. Therefore, it is necessary to establish the performance criteria properly by investigating performance requirement in the user's perspective. The purpose of this study is to identify of the weight of the required performance items for the lightweight wall in apartment house. To analyze the priority in the performance, an interview survey is performed; after monitering the test-bed of the lightweight walls, user and experts evaluate the performance requirements. The weight of the performance requirement is developed by AHP method.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2022년도 가을 학술논문 발표대회
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• pp.217-218
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• 2022

Supervision work deals with important data necessary for the performance management on building construction sites in accordance with the Building Act. Therefore, this study attempts to use the data from supervisory reports to measure the performance of private building projects. Performance measurement is important for systematic management. However, there are only a few cases in which performance measurement is performed because it requires strenuous efforts to collect data for measurement. First, this study derived 6 performance areas and 15 indicators through a few rounds of expert group discussions. Then, we confirmed the performance indicators with high feasibility of data collection through a survey of supervision experts. It is expected that the data of supervisory reports can measure systematically performance and assist in speedy diagnosis of private building construction sites.

• 경영과정보연구
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• 제33권5호
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• pp.249-260
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• 2014

본 연구는 우리나라의 코스닥시장을 대상으로 기업고유변동성과 주식수익률에 영향을 미치는 것으로 알려진 기업규모, 장부가/시장가, 주가순이익비율, 주가순자산비율, 주가현금흐름비율, 주가매출액비율, 거래회전율 등과 같은 기업특성변수들과 어떤 특징을 보이는 지를 우선적으로 알아보았다. 또한 실현범위변동성 및 기업고유변동성을 이용하여 주식에 투자할 경우 이들 변동성의 크기 따라 분류된 포트폴리오 간에 투자성과에 있어서 어떠한 차이를 보이는 지에 대해서도 살펴보았다. 분석결과에 따르면 기업고유변동성과 주가순이익비율, 주가순자산비율, 주가현금흐름비율, 주가매출액비율 거래회전율 등은 CAPM, FF-3요인 모형 둘 다 기업고유변동성이 높은 포트폴리오 일수록 기업특성변수들은 통계적으로 유의하게 높아지는 경향을 보였다. 즉, 기업고유변동성은 이들 기업특성변수들과 양(+)의 관계를 가지는 것으로 나타났다. 또한, 거래전략을 1/1/1, 즉, 포트폴리오 구성기간 1개월, 구성한 후 기다리는 기간을 1개월, 성과측정 기간 1개월로 정해서 실현범위변동성과 기업고유변동성이 주식의 기대수익률과 어떤 관계를 가지는 지에 대해 분석을 수행하였는데, 실현범위변동성과 기업고유변동성은 주식수익률과 체계적으로 양(+)의 관계를 가진다는 흥미로운 사실을 발견하였다.

• 한국산업정보학회논문지
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• 제19권6호
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• pp.131-150
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• 2014

본 연구는 스마트폰 이용고객이 현 이동통신업체에서 타제품 및 통신사 변경 등으로 전환하려고 할 경우 고객의 주관적 판단에 미치는 요인은 무엇이며, 이러한 전환의도가 궁극적으로 전환기대성과에 어떠한 영향을 미치는지 한국과 중국소비자를 중심으로 연구모형을 제시하였다. 분석 결과 한국 중국이용자 모두 전환의도는 전환기대성과에 정(+)의 영향을 미치는 것으로 분석되었다. 또한 브랜드신뢰성, 기능품질 및 거래의 전반적분위기는 전환의도에 정(+)의 영향을 미치는 것으로 분석되었다. 그러나 개인혁신성은 한국이용자의 경우 전환의도에 정(+)의 영향을 미치나, 중국의 경우에는 통계적으로 유의하지 않은 것으로 나타났다. 또한 콘텐츠품질의 경우 전환의도에 정(+)의 영향을 미치는 것으로 분석된 것은 중국이용자의 경우이고 한국이용자는 통계적으로 영향을 미치지 않은 것으로 확인 되었다. 본 연구는 양 국가 이용자 간 문화적 차이점이 존재함을 실증분석을 통해 제시되었기 때문에 스마트폰 이용고객 유지 및 관리를 위한 전략적 방안에 많은 시사점을 제공하였다.

• 대한건축학회논문집:계획계
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• 제35권11호
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• pp.53-60
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• 2019

Multi-unit house, multi-household house, row house and apartments with less than 500 households were included in the list of anti-crime for buildings following the revision of the "notice of crime prevention building standards" on July 31, 2019. Strengthening the performance of crime prevention buildings is inevitable to increase the cost of building construction, including installation of preventive facilities and use of facilities that have secured performance. Thus an economic analysis on the costs and expected benefits of implementing the standards is required for social consensus. Economic analysis is divided into cost analysis and benefit analysis. This study aims to perform an economic analysis on the installation of crime prevention facilities in the buildings subject to expanded crime prevention obligations. Cost analysis is calculated as the sum of the cost of installation and the price of the crime prevention facilities installed for each target residential building. Benefit analysis is calculated as the social cost of targeted crimes that are expected to decrease due to the installation of crime prevention facilities. Economic analysis shows that the total cost of installing crime prevention facilities in residential buildings is estimated at 107.31 billion won per year, while the total benefit from enhanced crime prevention performance is estimated at 9.38 billion won per year. Considering inflation, benefits are expected to outpace costs in the 28th year since the system was implemented.

• 무역학회지
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• 제48권4호
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• pp.209-232
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• 2023

EU는 2030년 온실가스 배출량을 1990년 대비 55% 감축 목표로 하는 'Fit for 55' 입법 패키지에 국가별로 다른 온실가스 규제로 인한 수출품의 불균형한 가격을 조정하는 조치로 탄소국경조정제도(CBAM)를 2026년부터 시행하는 내용을 포함하였고, 이는 수출 비용의 증가를 가져와 우리나라 철강 제품 수출에 부정적인 영향을 미칠 것으로 예상된다. 본 연구는 철강 제품의 EU 수출에 영향을 주는 요인과 CBAM에 따른 수출 변화를 추정하기 위해 2001년부터 2021년까지 EU 27개 회원국의 통계를 이용하여 중력모형으로 실증 분석을 하였다. 분석 결과로 각 EU 국가의 경제 수준, 인구 규모, 환율, 제조업 생산지수, EU 단일시장의 효과는 우리나라 철강 제품의 수출 증가에 도움을 주지만, CBAM의 실행으로 2026년에 탄소세가 CO₂ 1톤당 USD 10 ~ USD 30이 부과되는 것을 가정하여 중력모형으로 추정한 결과는 철강 수출이 CBAM 시행 이전에 비해 약 -3.6% ~ -5.7% 감소하는 것으로 나타나 앞으로 철강 제품의 가격 경쟁력 향상과 CO₂ 저감을 위한 기업과 정부의 대비가 필요할 것으로 보인다.

• 한국정보통신학회논문지
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• 제23권12호
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• pp.1738-1741
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• 2019

Music performance techniques have been primarily trained by apprenticeship. The technique transfer, which relies on the imitation of experience and actual performance without scientific evidence, required the pianists more time and effort than necessary. However, if the players in the field discover the principles of universally applicable piano playing techniques in collaboration with scientists, they will avoid errors and prepare a new paradigm in the development of piano playing techniques. This is why music performance science is needed. Little has been studied about it in Korea, but it has been activated abroad since the mid-1990s. The core science of music performance science is expected to be computer science fitting data analysis. In this paper, we introduce music performance science for the pianist and present how computer can help it.

• Journal of Positioning, Navigation, and Timing
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• 제3권1호
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• pp.11-16
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• 2014

A Satellite Based Augmentation System (SBAS) is a representative differential GNSS system, which is used for the navigation performance improvement of Global Navigation Satellite System (GNSS) users. SBAS has been developed focusing on the securement of user integrity so that it can be used for the navigation in aviation fields. Accordingly, the development of SBAS has been completed, and it has been actively used in the United States, Europe, and Japan. As the new satellite of Global Positioning System (GPS) recently started to broadcast new civil signals (L5 frequency), the methods for improving user navigation performance in SBAS using this signal have also been studied. In Korea, to keep pace with these circumstances, full-scale SBAS development is expected to start in 2014, and studies on dual-frequency SBAS using L1/L5 frequencies will also be performed. In this study, before the full-scale development of dual-frequency SBAS in Korea, a simulation was performed to predict the performance and analyze the expected effects.

• Journal of Positioning, Navigation, and Timing
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• 제2권2호
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• pp.101-108
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• 2013

GPS is the most widely-used Positioning, Navigation, and Timing (PNT) system. Since GPS is an important PNT infrastructure, the vulnerability of GPS to signal jamming has received significant attention. Especially, South Korea has experienced intentional high-power jamming from North Korea for the past three years, and thus realized the necessity of a complementary PNT system. South Korea recently decided to deploy a high-power terrestrial navigation system, eLoran, as a complementary PNT system. According to the plan, the initial operational capability of the Korean eLoran system is expected by 2016, and the full operational capability is expected by 2018. As a necessary research tool to support the Korean eLoran program, an eLoran performance simulation tool for Korea is under development. In this paper, the received signal strength, which is necessary to simulate eLoran performance, from the suggested Korean eLoran transmitters is simulated with the consideration of effective ground conductivities over Korea. Then, eLoran signal-to-noise ratios are also simulated based on atmospheric noise data over Korea. This basic simulation tool will be expanded to estimate the navigation performance (e.g., accuracy, integrity, continuity, and availability) of the Korean eLoran system.