• 설비공학논문집
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• 제14권3호
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• pp.221-230
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• 2002

In this study, in-situ performance test of an air source heat pump which has a arted capacity of 10 RT is carried out. Since test conditions, such as indoor and outdoor air conditions cannot be controlled to satisfy the standard test conditions, experiments are done with the inlet air conditions as they exist. To estimate the performance for other conditions, he heat pump is modeled with a small number of selected parameters. The values of the parameters are determined from the few measurements measured on-site during normal operation. A simulation program is developed to calculate cooling capacity and power consumption t any other operating conditions. The simulation results are in good agreement with the experiment. This study provides a method of an on-site performance diagnosis of an air source heat pump.

• 한국화재소방학회논문지
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• 제22권4호
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• pp.50-53
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• 2008

본 연구는 우리나라 소화설비중 화재감지기 자체점검의 문제점 및 개선방안에 대하여 고찰하였다. 화재감지기의 현장점검시 사용되고 있는 현장점검용 기기의 신뢰도 및 성능 분석을 통하여 현장점검의 문제점을 파악하고 개선방안을 도출하는데 초점을 두었다. 분석결과 현장에서 사용되고 있는 화재감지기 현장점검용 기기의 신뢰도 및 성능상에 문제와 점검방법상에 문제가 있는 것을 확인 할 수 있었다.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2023년도 봄 학술논문 발표대회
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• pp.367-368
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• 2023

Kiscon, Seumteo, KONEPS and CSI are representative construction-related DBs. All four DBs are operated by the public. However, the characteristics of data are different depending on the purpose. Therefore, it is difficult to utilize integrated data and it is only used sparingly. Creating and sharing a unique key that can identify a construction site will enable integrated accumulation and management of construction-related data for various purposes. At this point, it is most efficient to assign a unique key based on KISCON. KISCOn data conforms to the construction site definition and covers most of the public, private, architectural and civil works. In addition, there is an advantage in that DB construction is performed in the construction situation, which is a relatively preceding process. In the future, it is necessary to create a practical construction site integrated DB through the production of an integrated key table containing linkage information of unique keys for site management, performance indicators, and statistics production.

• 한국콘텐츠학회논문지
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• 제20권1호
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• pp.60-72
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• 2020

최근 라이브 스트리밍이 급부상함에 따라 클래식 공연예술의 시장범위 또한 변화하고 있다. 이제는 단순히 공연실황을 녹화하는 차원이 아닌 라이브 스트리밍 플랫폼에 특화된 콘텐츠가 제작되고 있으며, 라이브 스트리밍이 클래식 공연을 홍보하고 감상할 수 있는 새로운 대안으로 떠오르고 있다. 이에 본 연구는 클래식 라이브 스트리밍 공연의 서비스 품질 요인이 시청만족 및 나아가 현장공연 구매의도에 미치는 영향을 시청자 198명을 대상으로 실증 분석하였다. 그 결과, 클래식 라이브 스트리밍 공연의 서비스 품질요인 중 실시간 상호작용성을 제외한 영상콘텐츠성과 편의성, 가격성이 시청만족에 영향을 미쳤고, 시청만족은 현장공연 구매의도에 영향을 미치는 것으로 나타나 클래식 라이브 스트리밍 공연의 현장공연 홍보효과가 입증되었다. 본 연구는 실증분석을 통해 현장공연 구매의도에 영향을 미치는 요인과 효과를 검증해 실질적인 전략수립의 단초를 제공했다는 점에서 의의가 있다.

• Journal of Construction Engineering and Project Management
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• 제4권1호
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• pp.45-50
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• 2014

Productivity analysis is the most important and significant method for evaluating management and engineering performance during whole project stage. However, it is very difficult in developing qualitative index to construction industry comparing to other industries. Therefore, analytical hierarchy process (AHP) is one of the methods for overcoming these limitations by checking consistency index using duality comparison. In this study, it is scraped up an application plan and selection for innovative tools by analyzing survey results on tool users and site managers with respect to using Modified-AHP performance measurement method.

• 물과 미래
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• 제12권2호
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• pp.63-69
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• 1979

The sequences of monthly streamflows constitute a non-statonary time series. The purely stochastic model has been applied to data generation of non-stationary time series. Tow different mothods--single site and multisite generation--have been used on the hydrologic time series. In this study the synthetic generation method by bivariate analysis, studied by Thomas Fiering, one of multi-site models, has been applied to the historical data on monthly streamflows at two sites in Nakdong River, and also for validity of this model the single site Thomas Fiering model applied. Through statistical analysis it has been shown that the performance of bivariate Thomas Fiering model was better than that of the other. By comparison of mean and standard deviaion between the historical and the generated, and cross correlogram interpretation, it has been known that the model used herein has good performance to simultaneously generate the monthly streamflows at two sites in a river hasin.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2020년도 봄 학술논문 발표대회
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• pp.142-143
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• 2020

A study was conducted on the production of LEFC using the Precast method, not the on-site construction. LEFC, Light Emotion Friendly Concrete, has the advantage of plastic rods being inserted to allow light to transmit, but because of the lack of adhesion to concrete, it leads to a decline in mechanical performance and durability. Therefore, it is necessary to apply precasting techniques to ensure homogeneous and superior quality of LEFC. In this study, wooden molds were used and plastic rods were arranged on porous acrylic plates. Prototyping was carried out with a UHPC mix proportioning to ensure flowability, self-consolidating performance and mechanical performance.

• 한국건축시공학회지
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• 제19권3호
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• pp.281-287
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• 2019

건축프로젝트의 성과향상을 위해 현장관리자들이 조직에 최선을 다할 수 있도록 효과적으로 관리하는 것이 중요하다. 또한, 현장조직은 끊임없이 의사결정을 하므로 조직에서 의사결정이 적절하게 이루어지는지가 성과에 많은 영향을 미친다. 따라서 본 연구에서는 현장조직의 성과향상을 위해 현장관리자의 의사결정 참여와 조직몰입의 관계를 파악하는 것이 목적이다. 연구 결과 현장관리자들은 의사결정을 할 때 사람 중심보다는 업무 중심으로 하는 성향이 높은 것을 알 수 있었다. 또한, 의사결정 유형에 따라 정서적 몰입에 차이가 있으며, 의사결정 참여도와 조직몰입 간에 약한 상관관계가 있는 것을 알 수 있었다. 본 연구는 현장조직의 직무수행관리 능력을 높이는 데 도움을 줄 수 있을 것이다.

• 방사성폐기물학회지
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• 제17권4호
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• pp.389-403
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• 2019

Large amounts of concrete waste are likely to arise from the decommissioning of a Kori-1 nuclear power plant. Several studies have been conducted on decommissioning concrete waste in recent decades, however, they have been limited to contaminated concrete issues or were small pilot-scale experiments. This study constructed two industrial-scale models of on-site concrete waste management for clean as well as contaminated concrete. To evaluate the performance of both the models, simulations were conducted using the Flexsim software. The concrete particle size distribution of Kori-1 and concrete processor properties based on widely used construction equipment were used as sources of input data for the simulations. It was observed that it may take over two years to complete the on-site concrete management processes owing to the performance of existing processors. In addition, it was demonstrated that it is essential to identify bottlenecks in the system and enhance the performance of the relevant processors to avoid delays of the decommissioning schedule. Our results suggest that this novel approach can contribute to developing schedules or expediting delayed activities in the Kori-1 decommissioning project.

• KIEAE Journal
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• 제5권3호
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• pp.11-16
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• 2005

The recent trends of high-density and high-rise in apartment housing have caused the problems of decrease in ventilation rates and increase of indoor pollutant contaminants. SHS(Sick House Syndrome) has now become a major issue and threats the health of residents. To solve these indoor air problems, increase in ventilation rate is considered as one of the most efficient approach. Thus, the recent housing development is pursuing improvement in the site design and the layout of apartment building blocks to promote natural ventilation is now investigated as one of the fundamental solutions. This study was focused on the air flow characteristics of outdoor environment in an apartment complex to keep the pollutants out of the site. Age of air and pressure difference have been used as indices of the outdoor air quality. Four different types of apartment building layouts have been analyzed by CFD simulation. This study again selected a real apartment housing complex as a case study model. By analyzing the pressure differences between the front and rear of an apartment building block, the ventilation performance in each individual unit was evaluated, and its impact on ventilation performance is investigated by analyzing the stagnant air around the apartment building blocks. During this process, existing patterns of apartment housing layout have been evaluated, and the most appropriate site layout has been chosen to analyze the outdoor airflow patterns. Based on the analysis of airflow patterns of site layout, the possibilities of improving ventilation performance of an individual apartment housing is proposed.