• Spatial Information Research
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• 제14권3호
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• pp.335-347
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• 2006

지자체 업무는 종합행정인 동시에 다양한 공간정보와 관련이 있다. 그동안 지자체 GIS는 업무의 효융성 제고, 대국민 서비스 향상 및 의사결정의 효율적인 도구로 집중적인 투자로 인하여 괄목상대한 발전을 이루었다 최근 들어 지자체에서는 도시기능의 혁신, 도시안전의 제고 등을 위하여 유비쿼터스 기술도입에 관심이 집중되고 있으며, 이는 유비쿼터스 도시(Ubiquitous City, u-City)라는 새로운 차세대 도시 건설의 동인이 되고 있다. 유비쿼터스 도시는 정보, 기술, 서비스가 융복합된 도시로, 효율적인 유비쿼터스 도시를 추진하기 위해선 기존의 지자체 GIS 연계통합이 핵심이다. 이에 본 연구에서는 유비쿼터스 시대를 맞이하여 지자체 GIS의 발전적인 방향을 제시하고, 유비쿼터스 도시를 위한 지자체 GIS 연계통합 전략을 제시하고자 한다.

• 한국컴퓨터정보학회논문지
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• 제28권1호
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• pp.79-86
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• 2023

건설은 인간에게 생활의 편안함을 제공하는 가장 오래된 분야 중 하나이다. 그러나, 현재 IT 분야뿐만 아니라 다른 분야의 지속적인 발전에도 불구하고 여전히 낮은 자동화로 인한 생산성 저하가 심각한 수준이다. 특히 건설 분야에서 4차 산업혁명 기술의 활용은 이제 막 시작한 단계이다. 블록체인은 4차 산업혁명 기술 중 하나로서, 여러 장소, 국가 또는 조직과 같은 다양한 지리적 위치에 분산된 데이터를 복제, 공유 및 동기화하는 데 사용되는 일종의 분산 데이터베이스이다. 본 논문에서는 블록체인을 소개하고 이를 활용한 건설 분야의 사례를 일곱 가지 주제별로 문헌 분석한다. 분석 결과, 건설 분야에서 블록체인 기술의 이해도를 높이고 향후 다양한 서비스 개발에 유용성을 제공할 것으로 기대된다.

• 한국IT서비스학회지
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• 제14권2호
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• pp.275-287
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• 2015

Information technology (IT) convergence have been recognized one of the key drivers in the industry perspective. Especially, IT convergence have been one of the most important innovative way for defense sector. Korea government established IT convergence policy in 2008 and have been applying it to the core industry such as automotive, shipbuilding and defense industries. Recently, the creative vitamin project has been launched. Vitamin 'D' means the way to create the value of defense industry. This research analyzes and evaluates various IT convergence business models based on an operation of defense IT convergence center from 2011 to 2014, which is the industry IT convergence centers. Defense IT convergence business models can be classified into four types of mission area as follows : weapon acquisition and management, military intelligence, military power construction, and resources management. We define the concept of defense IT convergence and describe the framework and processes for applying IT to the defense sector. We analyzes and evaluates various business models designed through defense IT convergence framework and processes.

• 한국태양에너지학회 논문집
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• 제27권2호
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• pp.61-69
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• 2007

The final energy consumption in the building sector in Korea represents almost 20% of the total energy consumption. Besides, Space heating and hot water generation in Korea are based on fossil fuels, with a serious environmental impact. Despite the popularity of simple solar domestic hot water systems, active solar space heating remains, for various reasons, marginal. And thus, the aim of this paper is to demonstrate potentialities of solar assisted space heating systems, both technically and economically. From this study found that the solar heating system with CPC solar collectors integrated the roof of a single-story residential building shares $50{\sim}55%$ of the annual heating load.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.42-47
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• 2008

This paper reports the system performance of a hybrid plant, which combines a renewable energy plant of GSHP(Ground Source Heat Pump) with a conventional plant (screw water chiller). To find out operational cost and operating characteristics, the performance of the hybrid system was measured in a building located in Jeju island. Based on the measured data, the operating characteristics were analyzed and the operational cost was estimated by using payment table, which was provided by the Korea Electric Power Cooperation. Operating methods to save energy were recommended.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 동계학술발표대회 논문집
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• pp.493-498
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• 2008

Particles or deposit formed by corrosion of the pipe material bring about bad influences on the heating systems with inconvenience, energy loss and so on. In order to obtain the non-corrosive environments, the circulation hot water should properly be treated in several ways to satisfy one or more conditions of the followings: suitable pH-level, low hardness, low oxygen content, low conductivity, low level of chlorides and sulphur compounds and low level of solid particles. This experimental study was carried out to develope the new guidelines on the optimal water quality and directions for water quality management in heating systems. As results, it was recommended that the heating water be maintained pH-level not less than 8, hardness contents as $CaCO_3$ no more than 50 mg/L, turbidity no more than 10 NTU and T-Fe contents 1 mg/L below.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2007년도 동계학술발표대회 논문집
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• pp.352-357
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• 2007

The objective of this study is to find the optimal set-point of a hybrid Plant, which is combined by renewable energy plant of the GSHP(Ground Source Heat Pump) and the conventional plant(chiller, boiler). The work presented in this study was carried out by using the EnergyPlus(Version 2.0). In order to validate the simulation model, field data were measured from a building. The GSHP was used as a base plant and the conventional plant as the assistant plant. Various temperatures were controlled (zone summer set-point, zone winter set-point, chilled water temperature, hot water temperature) to find the optimal set-point temperature of the system. The influence of the various set-points were analyzed seasonally.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.1254-1254
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• 2022

The Multi-family Residential is one of the most famous building types for a rental property in the US. Often times it includes multiple residential buildings and some amenity facilities, including a clubhouse or leasing office, swimming pool, dog park, and garages. Since the building type is built for rental purposes, the construction planning is phased and it makes the project complicated. Detailed planning and execution are important for successful construction management. This paper provides some management practices that are applied to one of the multi-family residential construction projects in Phoenix, AZ. The Front End Planning (FEP) process performed by both owner and contractor is the first key to a successful construction project. Specifically, the early review of phased turnover strategy, grading, fire/Americans with Disabilities Act (ADA) compliance, and Mechanical/ Electricity/Plumbing/Technology (MEPT) will provide absolute benefit to the project. Second, using a scheduling method to control short-term schedules and long-term can provide the ability to manage the issues with agility. Third, material delivery and procurement dominate the both project schedule and cost. With this COVID-19 circumstance, it is hard to expect the material, equipment, and labor forces to be delivered on time with the contracted price. Managing floats are more than important to managing construction productivity. Risk management should work to share the risks fairly. Lastly, turnover is directly linked with the profit of the project for both owner and contractor. The communication between the owner and contractor to re-schedule the proper turnover schedule is important for the phased construction project.

• 대한토목학회논문집
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• 제33권4호
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• pp.1719-1730
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• 2013

최근 BIM 기술은 적용 확대가 모색되고 있으나, 관련 제도 미비, BIM 인프라 구축비용, 프로세스 상이 등과 같은 문제로 인해 초기 기대치보다 확산이 지연되고 있다. 따라서 본 연구는 이러한 문제 중, BIM 운영을 위해 필요한 인프라 구축 비용 절감과 국내 프로세스에 맞는 다양한 BIM 서비스 제공을 위한 방안으로 클라우드 컴퓨팅 기술과 BIM을 접목하는 것을 제안하고, 이를 위한 수요 조사를 바탕으로, 클라우드 컴퓨팅을 이용한 인프라 비용 절감(IaaS 구축)을 위한 IFC 기반 BIM 서버와 맞춤형 서비스(SaaS 제공)를 위한 Viewer를 개발하였다. 또한 본 연구에서는 개발된 시스템의 실용화 가능 여부에 관한 성능 테스트를 실시하여, 개발 결과물이 향후 클라우드 기반 BIM 서비스 개발의 요소기술로 활용될 수 있다는 것을 검증하였다.

• 한국IT서비스학회지
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• 제15권3호
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• pp.195-209
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• 2016

IoT (Internet of Things) is a collective term referring to application services that provide information through sensors/devices connected to the internet. The real world application of IoT is expanding fast along with growing number of sensors/devices. However, since IoT application relies on vertical combination of sensors/devices networks, information sharing within IoT services remains unresolved challenge. Consequently, IoT sensors/devices demand high construction and maintenance costs, rendering the creation of new IoT services potentially expensive. One solution is to launch an IoT open market for information sharing similar to that of App Store for smart-phones. Doing so will efficiently allow novel IoT services to emerge across various industries, because developers can purchase licenses to access IoT resources directly via an open market. Sharing IoT resource information through an open market will create an echo-system conducive for easy utilization of resources and communication between IoT service providers, resource owners, and developers. This paper proposes the new business model of IoT open market for information sharing, and the requirements for ensuring security and standardization of open markets.