• Annual Conference of KIPS
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• 2009.11a
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• pp.485-486
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• 2009

도시가스 배관에서 노출배관 위험요소에 대한 모니터링이 필요하나 현재는 인위적으로 사람에 의해 확인하거나 유선 기반의 감시 시스템이 존재한다. 이에 대한 제반 비용을 감소시키면서 무선 기반의 감시 인프라를 구축하기 위해 본 연구에서는 노출배관의 위험요소 중에서 가장 중용한 응력과 진동을 측정하고 CDMA 방식을 이용하여 모니터링 시스템에 전달해주는 시스템을 구축하며 실제 환경에서 시험환경(Test-bed)을 조성하여 대상 시설 및 설치 환경에 따라 최적화된 기기 및 인프라를 구축하는 것을 본 연구에서 기밸반된 도시가스 안전 유비쿼터스 인프라에 통합시키는 것을 목적으로 한다.

• Annual Conference of KIPS
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• 2009.11a
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• pp.99-100
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• 2009

자동차에 대한 IT 융합 기술이 증가함에 따라 소프트웨어가 자동차 전체에 차지하는 비중은 점점 증가 하고 있으며, 최근에는 자동차의 품질을 좌우하는 주 요인으로 부각되고 있다. 그러나 응용 서비스를 제공하는데 있어서는 여전히 자동차 제조사별, 차종 별로 특화되어 있는 정보가 많아 차량 정보를 활용하기 어려운 단점이 있다. 이에 본 논문에서는 차량 정보를 기반으로 서비스를 개발하는데 있어 반복적으로 재사용될 수 있는 차량-IT 용 차내망 컴포넌트에 대한 방안을 제시하고자 한다. 차내망 컴포넌트를 통한 차량 정보 이용은 자동차-IT 분야의 시장 진입 장벽을 낮추고, 제품의 개발 및 시험 기간 단축과 이에 따른 비용 절감 효과를 가져 올 수 있다.

• Annual Conference of KIPS
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• 2021.05a
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• pp.55-58
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• 2021

우주 네트워크는 고지연성, 저신뢰성 등 기존의 지상 네트워크와는 차별화된 특성을 가진다. 또한 높은 예산이 투입되는 우주 임무 특성상 지상 시험 시 발견되지 않은 소프트웨어 버그가 막대한 비용을 초래할 수 있다. 그러나 현재까지 우주 네트워크 환경에 특화된 소프트웨어 업데이트 관련 연구는 부족한 실정이다. 따라서 본 연구에서는 Asynchronous Management Protocol(AMP)을 기반으로 원격 소프트웨어 업데이트 프레임워크를 새롭게 제안한다. 해당 프레임워크는 Interplanetary Overlay Network(ION) 소프트웨어를 사용하여 프로토타입을 구현하였으며, 실제 업데이트 케이스를 적용하여 기능 및 실사용성을 검증하였다.

• Annual Conference of KIPS
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• 2021.11a
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• pp.1223-1226
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• 2021

본 논문은 비대면 한국어 회화 시험 연습용 안드로이드 애플리케이션을 제안한다. 한국어 학습에 대한 수요가 증가함에 따라 효과적인 한국어 회화 학습을 위해선 시·공간의 제약이 없는 학습 환경에서 사용자에게 구체적인 평가 지표를 제공할 필요성이 있다. 본 연구는 자연어 처리 기술을 활용하여 사용자의 한국어 회화 능력을 평가하는 알고리즘과 개인의 취약점을 보완할 수 있는 비대면 학습 플랫폼을 제시하였다는데 의의가 있다. 본 논문의 결과를 통해 회화 학습의 비용을 절감하고, 효율적인 언택트 학습 지원이 가능할 것으로 기대한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2019.11a
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• pp.65-67
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• 2019

해양활동의 급속한 확대로 해마다 발생하는 해양사고의 발생이 증가하고 있으며, 사상자 수도 비례적으로 증가하고 있다. 이러한 사고를 줄이기 위해서, 다양한 구조 요청 기기가 개발되고 제시되되어 왔으나 단일화 되지 못한 통신 방법, 구조 요청 과정에 대한 사용자의 인식 부족으로 실질적인 구조 요청 장치의 사용율이 지극히 낮다. 또한 해양의 특수성으로 인하여 제시되어온 기기를 이용하기 위해서는 큰 비용이 소요되었다. 이에 따라 실질적인 구조 가능성을 높이고 해양사고로 인한 사상자를 최소화하기 위해 본 연구의 목적은 실험평가와 경험적 공식을 바탕으로 일반 사용자가 손쉽게 접근 가능한 안드로이드 애플리케이션과 연결된 자동 구조 요청 장치를 개발한 것으로, 본 연구는 현장 및 실험실 시험의 결과에 근거하여, MOB 구출을 위한 자동 구조 요청 장치의 사양을 확정 검증하는 실용화 연구를 수행하였다.

• Annual Conference of KIPS
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• 2023.11a
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• pp.1114-1115
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• 2023

이 논문은 해양 안전 및 보트 운항 훈련을 위한 소형선박 시뮬레이터의 개발을 다룬다. 시뮬레이터는 자유 운항, 시험 모드 운항, 초급자 훈련 모드 운항 등 다양한 기능을 제공하며, 사용자의 실력과 선호도에 따라 맞춤 교육을 제공한다. 이를 통해 보트 운항의 안전성을 향상시키고, 비용 효율적인 방법으로 많은 사용자들에게 접근 가능한 학습 도구를 제공한다.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.38 no.2
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• pp.327-335
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• 2018

In order to calculate the quality management cost of construction work, the process must conform to relevant laws and regulations. In details, the cost of the various items such as quality test fee and quality control activity cost are required to be calculated. Regarding the quality management costs, the labor cost is applied to the quality examination fee and the calculation unit quantity in the construction quality management duties. The application of the unit price of the labor cost stipulates that Construction Association of Korea and Korea Engineering & Consulting Association apply the unit price which is surveyed and published. However, in the related laws and regulations, the standard of the quality manager and quality tester is not clear. This accounts for the confusion in the cost of construction management and the cost of labor. In the current law, the allocation standard of quality control personnel is specified according to the size of the construction, but the standard of placement of quality testers is not specified. At the construction site, there is no assignment criteria manpower for quality testers except quality managers, or very little work is being done. The quality control personnel conducts the quality test work to be carried out by the quality tester, and this carrying out heavy work. Therefore, it is difficult to maintain quality control activities. In this study, the labor cost of quality management expenses and the allocation criteria of quality managers and quality testers are established and presented for the purpose of securing the quality of the construction work and preventing the construction work. It is stipulated that the standards of the relevant laws and regulations, which are not clear, should be classified into quality control personnel and quality testers according to the size of the construction. Based on the unit price of Korea Engineering & Consulting Association, the personnel expenses of quality managers and quality testers are proposed to apply the unit price of engineer (professional engineer, specialist, advanced, intermediate, beginner) and skilled technicians (advanced, intermediate, beginner).

• Journal of the Korean GEO-environmental Society
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• v.13 no.11
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• pp.93-101
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• 2012

SCP is a construction method that maximizes the effects of ground improvement by creating sand piles, which are formed by the compaction within soft ground. SCP is mainly used for consolidation and drain effects in clayey soils, and as a liquefaction countermeasure through effects such as compaction in loose sandy soils. In the design of SCP, if the sand piles with high stiffness are not taken into account, it can become a design that overly considered safety, and increased construction costs are highly likely to cause economic disadvantages. The changes in stress conditions and compaction mechanisms in the subsurface have been identified to a certain extent by study findings to date. However, the studies that considered SCP and in-situ ground as composite ground are fairly limited, and therefore, those studies have not achieved enough results to fully explain the relevant topics. In this study, the ground improved by SCP was regarded as the composite ground that consists of SCP and in-situ ground. Moreover, employing a CID test, this study examined the changes in the stress conditions of in-situ ground according to the installation of SCP through the relations between $K_0$ and SCP replacement ratio. At the same, whether the SCP installation procedure can be recreated in a laboratory was examined using a cyclic triaxial test. According to the test results, the changes in the stress conditions of the original ground occurred most largely in an initial stage of SCP installation, and after a certain time point, the vibration for SCP installation did not have a great influence on the changes in the stress conditions of the ground. Moreover, in order to recreate the behaviors of in-suit ground according to SCP in a laboratory, cyclic loading, which corresponds to casing vibration, was concluded to be essentially required.

• Fire Science and Engineering
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• v.31 no.3
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• pp.79-87
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• 2017

Sandwich panels which are having the both sides are bonded with a heat insulating material with an iron plate are used as factories, warehouse structures as advantages of convenience in construction at economic efficiency of material cost. However, in a panel structure constructed by continuous joining of sandwich panels, a joint portion where a panel and a panel are connected is generated. The joint part is a part which is easily vulnerable to fire because flames easily flow into the melting and deformation of the iron plate during fire. The flames flowing into the panel induce diffusion of fire by rapid burning, causing damage of human life and property. In this research, we developed a flame spread prevention plate to prevent spreading of sandwich panel. This is an improvement of the workability by the anti-spreading construction method of the existing previous research, it can be applied independently to the connecting part where the panel and the panel are coupled, designed to prevent inflow and spreading of flame did. The actual fire test of the test method of KS F ISO 13784-1 of the sandwich panel specimen was conducted and the burning behavior corresponding to the presence or absence of application of the flame spread prevention plate was grasped at the panel connection part and its effect was measured. Inserting a fire spreading plate into the test result panel connecting part is measured by delaying the flashover, prevention of collapse of the specimen, and temperature rise of the opening, effectively improving the fire safety of the panel structure It was confirmed as a method that can be secured. It is judged that panel structure will contribute to ensuring fire safety by applying the fire spread prevention construction method of various methods ensuring the workability and economy of panel connection vulnerable to fire.

• Journal of the Korean Geosynthetics Society
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• v.17 no.1
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• pp.11-20
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• 2018

Surplus soil is commonly used at construction sites, because suitable fill material is not always immediately available and leads to additional costs. However, most surplus soils do not meet the requirement of suitable fill material to achieve the stability and strength of embankments. In this study, Proctor compaction tests and field compaction tests were performed by installing geosynthetics to resolve the problems caused by compacting unsuitable soils. Compaction energy and the number of geosynthetics were changed under the type A- and D- and type A Proctor compaction tests (KS F 2312), respectively. The field compaction testing using geosynthetics was performed on surplus soils of high water content. Optimum water content and maximum dry density of compacted soil decreased and increased by reinforcing geosynthetics, respectively. Compaction curves behaved with geosynthetics as the compaction curves behaved with higher compaction energy. Efficient compaction was possible because the compaction energy increased to 2.10 and 2.71 times the compaction energy required to achieve the same maximum dry density with one and two geosynthetic layer(s), respectively. Furthermore, field compaction tests verified that efficient compaction was possible because the dry density of unsuitable surplus soils of high water content was increased by reinforcing geosynthetics.