• Proceedings of the Korean Society of Agricultural Engineers Conference
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• 2005.10a
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• pp.367-374
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• 2005

In order to construct the farm road in Shi-Hwa project, coarse soils excavated from hillsides have been used as road materials for reclamation. Suitable borrow pits available in land are now limited and also they bring about environmental problems when soils are excavated at the borrow pits and transported to the site. When using fine and wet materials as fill, however, many engineering problems can be encountered. Usually, the materials have high water contents, low strength, and high compressibility. In order to use them, we need research that can improve the inherent properties of those materials. In order to tackle with the problems, researches on soil improvement involve mixing lime geo-cement to the fine wet soils. A lab model test is necessary to verify effectiveness and comparison of those techniques. A field test is also required to show applicability and to find problems that may exist in the design and construction stages.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.11
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• pp.5182-5199
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• 2017

Recently, Internet of Things (IoT) drives a large variety of research, development, and new type of markets. All type of devices and sensors will be part of the Internet of Things and will be able to communicate not only plain data, but also audio-visual, olfactory, and haptic media data. In addition, as the devices and sensors getting smarter, it is highly probable that they can process acquired media and metadata to extract higher level of information (e.g., semantics). To support such enhanced functionalities, ISO/IEC SC29 WG11 (MPEG) starts a new standard project, ISO/IEC 23093, called Internet of Media Things (IoMT) to provide standard data formats and APIs for media things. This paper presents the standardization activities of IoMT focusing on explaining terms, standard scopes, and major media things with their use cases. One of the use cases, an IoT system for a blind pedestrian navigation assistance, is evaluated to prove its effectiveness.

• Journal of Construction Engineering and Project Management
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• v.1 no.1
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• pp.18-23
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• 2011

Conservation of energy and fuel is the trend in smart building design. Radio Frequency Integrated Circuit (RFIC) technology is often used in temperature sensing and signal transmission to manage indoor temperature, but it is rarely applied to the shell of the building. Heat retention and poor insulation in building shells are the largest causes of high energy consumption by indoor air conditioning. Through combining RFIC technology with temperature sensors, this study will develop smart temperature information material that can be embedded in concrete. In addition to accurately evaluating the effectiveness of shell insulation material, the already-designed Building Physiology Information System can monitor long-term temperature changes, leading to smarter building health management.

• Journal of Information Technology Applications and Management
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• v.19 no.4
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• pp.197-212
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• 2012

In this paper, we report the public IT policy case results to restructure informatization level indices for small and medium sized enterprise(SME). The indices restructuring project was initiated by TIPA with the group of experts during 2011, and the newly amended indices was employed as the formal instrument to measure SME informatization level. The critical drivers to reform the indices include simplification for more accurate measurement of SME informatization level, reshaping key representative indices of smart IT to better publicize SME's interest toward advanced IT, and systematic reconfiguration of performance measures which reflect business performance enhancement effect through IT investment. Indeed, the IT performance indices are unified to incorporate the instrument for general SME informatization level survey and IT adoption subsidy's effectiveness appraisal. The procedures and details of logic illustrated in this paper provides useful insight for successful implementation of SME informatization as well as for the better policy deployment of IT subsidization for SMEs.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1095-1096
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• 2006

Configuration management plays a key role in systems engineering process for any project from earlier stage of development. It consists of five major activities, ie., configuration management planing, configuration identification, configuration control, configuration status accounting and configuration verification and audit, and is essential to control system design development and operation throughout entire life cycle of the system development. And it is directly associated with other part of systems engineering management, ie., technical data management which provides traceability of important decisions and changes during development. In this paper, we describe how to apply CASE(Computer-aided Systems Engineering) tool-Cradle for the configuration management to achieve effectiveness of City Train Standard Specification Management process.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.277-281
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• 2015

시스템 엔지니어링은 현대사회에서 성공적인 프로젝트의 실현을 가능케 하는 하나의 개발 방법론으로 선진국에서는 정부, 공공기관, 방위산업체, 민수산업체 등에서 도입하여 시스템 개발 프로젝트를 전수명주기에 걸쳐 효율적이고 체계적으로 관리하고 있다. 시스템 검증 및 확인 프로세스는 시스템 엔지니어링의 핵심 요소 중의 하나로서 고객이 요구하는 시스템 요구사항들이 프로젝트 전수명주기에 걸쳐 올바르게 충족이 되었는가를 입증하고 확인하는 일련의 활동으로 구성된다. 본 논문에서는 국외의 연구 사례들을 조사하여 이러한 검증 및 확인 활동의 독립성이 시스템 개발 사업에 어떠한 긍정적인 효과를 발생시키는지를 분석하였다.

• Journal of Korean Society of Water and Wastewater
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• v.18 no.2
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• pp.145-154
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• 2004

A long-term sewer rehabilitation project consuming an enormous budget needs to be conducted systematically using an optimization skill. The optimal budgeting and ordering of priority for sewer rehabilitation projects are very important with respect to the effectiveness of investment. In this study, the sewer rehabilitation optimization model using fast-messy genetic algorithm is developed to suggest a schedule for optimal sewer rehabilitation in a subcatchment area by modifying the existing GOOSER$^{(R)}$ model having been developed using simple genetic algorithm. The sewer rehabilitation optimization model using fast-messy genetic algorithm can improve the speed converging to the optimal solution relative to GOOSER$^{(R)}$, suggesting that it is more advantageous to the sewer rehabilitation in a larger-scale subcatchment area than GOOSER.

• Journal of Information Technology Applications and Management
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• v.20 no.4
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• pp.151-164
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• 2013

According to the development of smart technologies such as smart phones, tablet PC, and SNS communication, the necessity of smart work that can change the working environments in organizations has been emphasized. However, while there are many organizations that wish to adopt smart technologies, there are those that have been skeptical until now about its potential success. Leaders may especially have different viewpoints concerning the efficacy and effectiveness of smart work depending on the industries, characteristics of the work, etc. Therefore, this research looks to investigate whether there may be differences between leaders (manager, project manager, supervisor, etc.) and non-leaders (team member, staff, etc.) group in accepting smart working through empirical and exploratory approaches.

• Proceedings of the Korean Society of Computer Information Conference
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• 2014.07a
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• pp.97-98
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• 2014

Lots of investment projects of new development and redevelopment for information systems have been not taken care of in the field of administration and evaluation, for these information systems projects have unique characteristics such as technology sensitiveness, network effectiveness, embeddedness, and externality. In fact, quantitative and qualitative evaluation of investments in information systems projects are not sufficient. It is critically important to generally evaluate benefits of development or operation cost, urgency, external effects, and so on. In addition, the efficient monitoring and effective analysis of information systems are surely needed for beneficient results of investment in information systems. We propose an economics evaluation model for information systems projects.

• International Journal of Aerospace System Engineering
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• v.3 no.2
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• pp.31-37
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• 2016

STEP Cube Lab (Cube Laboratory for Space Technology Experimental Project) is a 1U standardized pico-class satellite. Its main mission objective is an on-orbit verification of five fundamental core space technologies. For assuring a successful missions of the STEP Cube Lab with five payloads, electrical power subsystem (EPS) shall sufficiently provide an electrical power to payloads and bus systems of the satellite during an entire mission life. In this study, a design process of EPS system was introduced including power budget analysis considering a mission orbit and various mission modes of the satellite. In conclusion, adequate EPS hardware in compliance with design requirements were selected. The effectiveness and mission capability of EPS architecture design were confirmed through an energy balance analysis (EBA).