• Journal of the Korean Society of Hazard Mitigation
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• v.10 no.2
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• pp.77-81
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• 2010

D&B(Drill & Blast) method in tunnel construction requires accurate and rapid measurement of the ground movement, which is essential for feedback analysis. Case study and adaptability of IT technique for tunnel survey are discussed in this paper. The application of laserscannig and existing light wave instrument method in the field of tunnel construction were reported in several advanced country including Austria and Japan. Survey for the shoulder movements by IT survey method was conducted at a subway construction site and the results were compared to the conventional method. Also, the economic aspects of laserscannig method were analyzed using measured data which were categorized by expenses, frequency, interval and period in the field of construction. Therefore IT survey solution may contribute to execute more economic and safe construction

• Journal of the Korean GEO-environmental Society
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• v.18 no.6
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• pp.39-44
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• 2017

The behavior of the lateral resistance beyond the yield condition on single pile has been evaluated by comparative analysis. Pushover analysis of single pile has been performed to compare to the results on lateral load test of the pile foundation. The study for the behavior beyond the yield condition on single pile had been performed on the results on the lateral load test and pushover analysis considering mechanical conditions of the ground soil and the pile foundation.

• Fire Science and Engineering
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• v.30 no.5
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• pp.124-129
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• 2016

According to the current law, on-site flame resistant-treated interior decorations should pass the flame resistant performance test through a 45 degree combustion test from the district fire department. Although a 45 degree combustion test is the most accurate method for determining the flame resistant performance, it can be unreliable when tested on unauthorized samples. To avoid unauthorized sampling, this study suggests on-site flame resistant inspection by X-ray fluorescence spectrometer. Ten types of flame resistant paint were spread on plywoods and MDFs and the components were analyzed by X-ray fluorescence spectrometer. As a result, due to a difference amounts of substances in each paint, each flame resistant paints showed its own characteristic spectrum and the contents of each substance could be determined. On-site flame resistant inspections can be used efficiently when institutional procedures are created.

• 대한공업교육학회지
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• v.31 no.2
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• pp.83-110
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• 2006

A change in industrial education has been demanded with the emergence of rapidly changing knowledge-based society. Keeping pace with the current trend, the Specialized High Schools should analyze what their students need and suggest what they should do to be qualified for work. Even though the education paradigm is in the process of change from traditional industrial society to knowledge-based society, the Specialized High School still focuses on the out-of-trend traditional curriculum. Now, it's a time to introduce new curriculum which analyzes on-the-spot tasks and enhances students' creativity and capability to solve problems. For this study, new '3-Type school curriculum' models are examined. Furthermore, the on-the-spot based curriculum, which nurtures students' creativity and capability to take care of things should be adopted. This paper showed a direction toward the activation and generalization of the industrial education by specifying to which direction the 3-type curriculum-based the Specialized Vocational High School should move.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.18 no.6
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• pp.197-204
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• 2004

The temporary power installations are to be used for temporarily supplying power during work at construction sites and have a minimum of protective devices to differ from permanent installations. There are many risk factors caused by loose working environments, deterioration of installations at construction sites. To analyze risk factors of temporary power installations, the investigation and the questionnaire were carried out side by side for power receiving system patch and panel boards, and were performed by researcher, the related expert, engineer of Korea Electrical Safety Corporation all over the country. The objects were variable such as an airport, an apartment, a municipal playground As a result, there are many problems such as a bad lock, poor protection of charging department. Solvable methods are improvement of the related regulation safety education, safety check and so on. In the future, the analytical data can be applied to prevent the electrical shock at construction site, and can be used to stabilize electrical installations.

• Korean Journal of Construction Engineering and Management
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• v.21 no.4
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• pp.12-20
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• 2020

The demand for maintenance of underground facilities buried beneath the road continues to increase significantly, due to environmental problems caused by excessive noise and dust and complaints from urban residents, the demand for eco-friendly and low-noise road cutters is increasing. Therefore, we analyzed the cutting performance of low noise cutter and eco-friendly cutter and reviewed the improvement. Based on the field construction cases, problems and improvements were obtained according to the cutting machine working procedure. The productivity for cutting operations of eco-friendly cutters (36.0 seconds/m) was somewhat improved compared to the low noise cutters (37.6 seconds/m). However defects occurred in some sections and improvement was required.

• Korean Journal of Construction Engineering and Management
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• v.22 no.6
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• pp.138-146
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• 2021

135 Degree standard hook workability crossed in the Reinforced Concrete (RC) Structure is improved and it reinforces in one side 90° hook binding. As a result, we proposed a One-touch Rebar Reinforcing Clip(RCC Device) that demonstrates the same performance as the 135° standard hook. It was developed through the evaluation of construction and economic analysis. As a result of analyzing 13 sites applied from June 2020, As expected, most of the cases were applied to the structural supervision or the point of the construction supervisor as an irresistible measure. therefore, Through field performance analysis, Various methods such as the method that the original contractor first purchases and then provides after contract with the partner company were proposed for the use of efficient and voluntary reinforcing clip. As a result, It is expected that the contribution in the field will be very high in terms of quality and process management through active utilization.

• Proceedings of the Korea Water Resources Association Conference
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• 2005.05b
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• pp.1502-1506
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• 2005

하천 유량자료는 이수, 치수, 수질관리 등의 목적으로 널리 사용되기 때문에 여러 가지 수문관측 자료 중 가장 중요하다고 할 수 있다. 그러나 우리나라의 유량자료는 여러 가지 한계를 가지고 있어서 수문자료로서 제대로 사용되지 못하고 있는 실정이다. 유량자료의 정확도 향상을 위해서는 현장 유량측정의 정확도를 향상시키는 것이 일차적으로 필요하지만, 측정된 유량자료를 검증하고 수위-유량관계를 개발하여 유량으로 환산하는 것도 매우 중요하다. 본 연구는 현장에서 측정된 유량자료를 총체적으로 관리하고 분석하여 실시간으로 유량을 제공할 수 있는 운영시스템을 개발하는데 목적이 있다. 본 연구에서는 사용자 요구사항을 분석하여 해당하는 사용 사례별로 구분하는 방법론을 적용하고 이를 바탕으로 실시간 하천 유량정보를 생산할 수 있도록 유량측정기술, 분석 기술, 수위-유량관계 개발 및 분석 기술, 실시간 유량생산 기술 등을 각 단계별 모듈로 구성하여 사용자 및 관리자가 신속하고 편리하게 관리 및 이용할 수 있는 웹 기반의 실시간 유량정보 생산 및 제공 기반을 구축하였다.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.2091-2092
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• 2011

해마다 KEPCO에서는 구매하는 배전기자재 구매비용중 변압기가 차지하는 비중은 1800여억원('10년)으로 최대 구매비중을 차지하고 있으며(32%) 계속 증가하고 있는 추세이다. 따라서 배전용 변압기의 효율적 관리 및 수명연장에 대해서는 다양한 연구 및 관리방안을 운영하고 있으며, 그중 유중 가스분석을 통해 변압기의 열화상태를 진단하는 방법을 현장에서 가장 신뢰성있는 방법으로 운영하고 있다. KEPCO에서는 변전용 대형변압기 및 배전용 지상변압기에 대하여 절연유를 채취하여 가스분석을 하고 자체기준에 의거 열화판정 기준으로 적용하고 있다. 하지만 이러한 방식이 절연유 채취후 운반과정에서의 신뢰성, 분석시간 장기간 소요, 분석비용 등 여러 가지 현안문제를 안고 있는 실정이다. 본 연구에서는 이러한 문제점을 보완할 수 있는 변압기 진단방법을 제시하고, 새로운 방식에 대한 검증을 통해 현장 적용 가능성을 검토해 보고자 한다.

• Journal of Cadastre & Land InformatiX
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• v.50 no.2
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• pp.21-35
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• 2020

Due to the coronavirus pandemic and diplomatic disputes, governments are actively developing a policy to revitalize·reshore manufacturing and to diversify international cooperations. In order to develop such a policy, it is very important to compare and analyze domestic·international geospatial information. Over the decade, the US·EC governments have conducted a series of national researches to build data-based tools that can monitor·analyze regional geospatial information driven by government R&D investments. In the case of the EC system, it can compare geospatial information in domestic and international(including Korea) regions. Compared to US·EC cases, Korean examples of national researches with available data analplatform need future improvements. Current study is investigating an automated analysis methodologies using "National Institute of Science and Technology Information (NTIS)" DB, which was national security data until recently. Research on data-mining regional geospatial information can contribute to support policy fields that need to discover new issues in response to unexpected social problems such as recently faced corona and trade disputes.