• Journal of the Korean Geotechnical Society
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• v.40 no.2
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• pp.81-93
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• 2024

In Korea, numerous large-scale infrastructure construction projects and housing site developments are being undertaken. However, due to limited land availability, sourcing high-quality backfill materials that meet the standards for railroad and road embankment compaction and mechanically stabilized earth (MSE) retaining wall construction poses significant challenges. Concurrently, there has been an increase in structural failures of many MSE retaining walls, attributed primarily to reduced bearing capacity and impaired drainage performance, resulting from inadequate backfill compaction. This study aimed to analyze the structural performance and safety of an MSE retaining wall using recycled soil as backfill. We conducted small-scale model tests utilizing 3D printing technology combined with two-dimensional numerical analysis. The study quantitatively evaluated the MSE retaining wall's performance concerning the recycled soil mixing ratio and reinforcement installation methods. Furthermore, the utility of 3D printing was confirmed through the production of an experimental wall designed to facilitate easy reinforcement attachment, mirroring the conditions of actual MSE retaining wall construction.

• Journal of the Korea institute for structural maintenance and inspection
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• v.28 no.3
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• pp.100-107
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• 2024

Currently, in Korea, due to the rapid aging and deterioration of facilities, the minimum Maintenance Level and Performance Level' of facilities are required by the 'Facility Safety Act' or 'Infrastructure Management Act'. Since infrastructure assets have a long lifespan and the pattern of deterioration over time is complex, it is very difficult to maintain infrastructure as 'minimum maintenance state' or 'minimum performance state' by the current way of management. 'Asset Management' shall be performed not only by a technical perspective, but also by an accounting perspective such as cost and asset value. However, due to lack of awareness of 'asset management' among stakeholder, only technical perspective management is being carried out in practice. In order to effectively manage infrastructure assets, complex consideration of various asset value factors such as budget and service as well as safety and durability are required. In this paper, we presented a theory to evaluate and quantify the road network value for efficient asset management of the road network. We also presented a method of simulation to apply the theory presented in this paper. Through simulation and the results derived from this study, it is possible to specify the budget for the future national asset management, and to optimize the strategy for the management of old road facilities.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1284-1285
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• 2011

본 논문은 최근 친환경 교통수단으로 부각되고 있는 전기 자동차의 배터리에 전력을 공급하는 EV 충전기의 운전, 고장을 원격으로 진단, 분석하는 서버시스템의 구현방법에 대해 기술하고 있다. EV 충전기의 원격진단을 위해 기본적으로 충전인프라(서버/충전기/전기차/전력계통)가 필요하며, 이러한 인프라 내에서 운영시스템의 한 부분으로 원격진단/분석이 이루어질 수 있다. 이러한 분석시스템은 소유 및 관리 주체, 운영방향 및 분석정도 및 범위, 목적 등에 따라 달라질 수 있다. 그러나 기본적인 시스템 구현 방법은 큰 차이가 없으므로 본 논문에서는 이에 관해 상세히 다루어 보고자 한다.

• Current Industrial and Technological Trends in Aerospace
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• v.8 no.2
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• pp.113-123
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• 2010

To accommodate the increasing air traffic and increase safety and efficiency of aviation operation, ICAO (International Civil Aviation Organization) recommended the development and implement of a new CNS/ATM system which is based on GNSS technologies and data link communication. The system is composed of Communication, Navigation, Surveillance and Air Traffic Management. ICAO approved the Global Air Navigation Plan for CNS/ATM systems. The world aviation leader countries launched CNS/ATM Research and Development program to enable the Global Plan and support the transition of air traffic infrastructure. In this paper, to establish the direction and measures of domestic technology development, CNS/ATM technology trend is analyzed.

• Korea Petroleum Association Journal
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• s.292
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• pp.24-27
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• 2014

환경부에서는 1990년대 말경 대기오염 문제를 해결하기 위한 방안으로서 디젤 버스를 CNG 버스로 대체하고자 CNG 탱크 추가 등으로 가격이 비싼 CNG 버스에 대하여 보조금을 지급하고 CNG 충전 인프라를 구축하는 등의 지원정책을 실시하여, 현재 국내에서 운행하는 버스는 일부 소도시를 제외하면 대부분 CNG 버스로 대체되었다. 이러한 CNG 버스 정책으로 인하여 당시만 해도 매연 배출이 심하던 디젤 버스로 인한 공해물질이 줄어들고 대기질이 어느 정도 개선된 효과를 거두었다. 최근들어 환경에 대한 중요 이슈의 개념이 변화하고 있으며 자동차 기술도 새로운 변모를 보여주고 있는 것이 현실이기 때문에 CNG 버스만으로 운영되는 정책이 향후에도 계속 유지가 되어야 할지 다시 한번 생각해보아야 할 필요가 있다.

• 정보화사회
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• s.109
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• pp.58-65
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• 1997

1940년대에 태어난 컴퓨터는 50년이 지난 오늘에 이르러는 4-5세대 인공지능 및 전문가 시스템의 일반화에 이르기까지, 추후 10년 후에 전개될 컴퓨터에 의한 정보통신 세계는 우리가 상상하는 기대치를 훨씬 넘어설 복합적인 멀티미디어와 무선이동통신의 세계가 될 것임에는 의심할 여지가 없다. 지구에 관한 위치, 크기, 형태에 대한 2차원적 정보처리 단계에서 환경과 도시, 인구와 교통에 대한 다차원적인 정보통신문명의 우리가 대비해야 할 지리정보공간과 관련한 속성정보의 동시구축이 우리의 정보인프라구축에는 우선적으로 GIS기술에 의하여 해결해야 할 과제가 된 것이다.

• Proceedings of the KIEE Conference
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• 2004.10a
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• pp.235-236
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• 2004

도로교통분야에서 발전된 위치기간서비스기술을 철도에 응용함으로써, 철도이용의 편의성을 향상시키고 철도의 경쟁력을 향상시키고, 비상사태 발생시의 긴급재난 경고 서비스를 비롯하여, 열차나 화차/화물등의 위치를 실시간으로 추적관리하여 운영의 효율성을 향상시키는 등 그 적용을 확대하기 위하여, 그 기반 인프라라고 할 수 있는 철도무선통신네트워크 구성에 대하여 검토하였다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.857-860
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• 2012

본 논문은 금융투자업계에 대한 보안관제 정책을 기준으로 업계가 공동이용 가능한 통합보안관제시스템이 구축 가능하도록 금융투자회사들이 구축 운용하고 있는 보안인프라를 비롯한 전산망의 보안관제를 위한 적용 기술과 운용체계 등을 조사하고, 이를 토대로 외부로부터 공격에 대비한 모니터링, 침입탐지 및 실시간 방어 등의 기능이 적절하게 수행되고 업계 차원의 종합적이고 체계적인 관리가 가능한 통합보안관제시스템 모델과 운영방안을 제시하고자 한다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.611-619
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• 2021

Porous asphalt pavement (PAP) has many functions, such as reducing accidents and decreasing noise. On the other hand, vulnerability is inevitable because PAP contains approximately 20% porosity. This study evaluated the effects of the maximum aggregate size (MAS), temperature, and porosity on the PAP durability. The indirect tensile strength measures durability. This study tested the samples that stayed dry and were moisturized by freezing and thawing for mixtures having the same porosity of 20% and MAS of 13mm, 10mm, and 8mm. The same test was performed on a mixture of 20% and 22% voids made of the same material with a MAS of 10mm. As a result, for 20% porosity, significant differences in the changes in MAS and temperature were found. A clear difference was observed between 8mm and 13mm under dry conditions, but there were no other significant differences in the MAS change. Furthermore, there was a clear difference in temperature for the change in porosity and temperature, but the gap in 2% porosity at 20% did not show a clear difference. Therefore, it is necessary to develop a more durable PAP through quantitative evaluations of the factors affecting the PAP durability.

• Journal of the Korean Association of Geographic Information Studies
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• v.26 no.1
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• pp.1-10
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• 2023

With the advent of the 4th industrial revolution era, interest in autonomous driving technology is increasing. Accordingly it is necessary to seek safe driving by recognizing surrounding situations using sensors attached to autonomous vehicles along with the applicability of existing traffic facilities to autonomous driving lanes and the utilization of HD maps. In this study, in order to deduce the role of sensor only physical facilities which recognized through a laser scanner on an autonomous vehicle developed to improve road and traffic infrastructure, through comparative analysis with existing road facilities such as road signs, safety signs, and gaze guidance facilities. Sign facilities can promote driving safety by allowing autonomous vehicles to perform specific actions directly. In order to promote safe driving by recognizing sign facilities by using sensors for autonomous vehicles, it is necessary to prepare standards for installation, management, and use, and it is considered that management and supervision should be carried out continuously according to the standards.