• Journal of the Korea Society of Computer and Information
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• v.23 no.5
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• pp.55-63
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• 2018

In this paper, we designed a system that integrate and organize customer management programs and databases, which are performed independently of each other. And we designed the system so that it can be used for future marketing by implementing the system to share and efficiently utilize mutual independent maintenance information. From the CRM perspective, a comprehensive information system ghat manages every information on both new cars and second hand cares grom their purchase, to parts, to insurance, and to scraping needs to be established. The following should be applied in the establishment of the IAMS. Auto makers or auto maintenance services providers exclusive management of information on customers and their car maintenance services is aggravating the customer's inconvenience and complaints. In addition, the service provider has difficulty providing consistent maintenance services because it has little information about previous auto maintenance services the customer received. Besides, the customers who have no information on costs of parts and labor tend to hesitate to trust the costs of maintenance services. This study to provide customers with systematic maintenance service and causing them some inconvenience. Therefore, in order to maintain existing customers, auto maintenance service providers should provide services the customers wanted on the basis of accurate information about them.

• Advances in concrete construction
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• v.12 no.6
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• pp.517-525
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• 2021

More underground structures are increasingly being constructed such as box culverts for electric power transmission, and the life extension of these structures is very important. It is well known that the steel embedded in concrete is usually invulnerable to corrosion because the high alkalinity of the pore solution in concrete generates a thin protective oxide layer on the surface of the steel. Recent observations in the field and experimental evidence have shown that even steel in concrete can be corroded through the carbonation reaction of cover concrete. Carbonation-induced corrosion in concrete may often occur in a high carbon dioxide environment. In this study, the risk of carbonation of underground box culverts in Korea was evaluated by measuring the car¬bonation rate and concrete cover depth in the field. Then, the carbonation-free service life for the cover depth of the steel was calcu¬lated with in situ information and Monte Carlo simulation. Additionally, an accelerated carbonation test for a cracked beam specimen was performed, and the effect of a crack on the service life of a box culvert was numerically investigated with Monte Carlo simulation based on experimental results.

• Journal of Korea Multimedia Society
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• v.19 no.2
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• pp.317-324
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• 2016

This paper proposes a message transfer application using smartphone with NFC(Near Field Communication) and GCM(Goolge Cloud Messaging) technology for prevention of personal information leakage. In implementing for the proposed system, we design a NFC-based vehicle status alerts service which make it possible to communicate with smartpone message without phone-number between a car driver and an unspecified person. The application provides message communication mechanism without exposing the real phone number, using the NFC tag written with the driver's smartphone device ID and GCM push messages. Through the evaluation result of the actual implemented application, the proposed system can be efficient technology in protection for leakage of personal information such as personal phone- number in daily life.

• Proceedings of the Korean Information Science Society Conference
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• 2004.10c
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• pp.466-468
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• 2004

최근 무선 인터넷의 발전으로 이동환경에서 위치정보를 활용한 사용자 선호 기반의 정보 및 부가서비스가 많은 호응을 얻고 있다. 사용자의 위치에 따른 지도나 PDi(PDint of Interest) 정보의 제공은 이러한 서비스의 기본이라 할 수 있다. 그러나 모바일 환경에서는 특정지역 나 시스템에서 한정적인 서비스만을 제공하고 있으며 일부 CNS(Car Navigation System)에서는 이러한 정보가 메모리형태의 저장소에 포함되어 서비스되고 있지만 단말기 독립형 서비스이므로 정보의 동적 업데이트나 실시간 정보를 적용하기 힘들다. 본 연구에서는 XML 웹서비스를 이용하여 이동클라이언트인 PDA에서 실시간 위치정보를 적용한 벡터기반의 SVG지도 및 PDi 서비스가 가능한 클라이언트/서버 시스템을 설계하고 구현하였다.

• Proceedings of the KSR Conference
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• 2003.10b
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• pp.14-19
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• 2003

This paper is aiming to analyse the prefeasibility study of introduction of high speed rail freight system to transport some parcels for train operation efficiencies. As it does, this system can be meant a kind of multimodal system considering the passenger and freight in the same trainset, simultaneously. First, we implemented the parcel service market survey for customers preference, predicted demand forecast for high speed rail freight, and analysed B/C, NPV, etc.. As the result, this new system is feasible of applying the passenger-freight operation system economically, find the needs such as some revision of motor car for parcel freight transportation at the initial stage.

• Journal of the Korea Concrete Institute
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• v.12 no.3
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• pp.21-30
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• 2000

Recently, reinforced concrete structures exposed to severe enviroment are increased in metropolitan area. The acid rain and CO2 penetrated towad rebar, thus rebar corrosion occurred. The corrosion of rebar in concrete is, as in most corrosion processes, an electrochemical nature. The corrosion may severely affect on durability and service life of such a concrete structures. This study was performed for the purpose of acquiring data about corrosion condition and considering a countermeasure to prevent rebar from corroding due to carbonation of concrete. An accelerated car bonation testing procedure was applied to measure the evolution of carbonation and rebar corrosion with time for various water-binder ratios and cement types.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.5
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• pp.259-264
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• 2010

In this paper, for supporting more variable services than typical DSRC, brand call service, truck and an official vehicle services, etc. using location information and mobile communication network could be adapted. emergence helping information providing, multimedia service that are wireless internet, movies and games, are increasingly needed for competible wireless car mobile terminal. Those needs would make a development a wireless telemetries system based on WiBro interface in ubiquitous vehicle environment. We analysis the proposed telematics mobile terminal using simulation which is concerned about fixed bandwidth and dynamic bandwidth.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2000.11a
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• pp.787-791
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• 2000

최근 들어 인터넷 보급이 폭발적인 증가를 보이면서 인터넷 비즈니스(Internet Business) 또는 전자 상거래(EC : Electronic Commerce)에 대한 관심이 급속도로 확산되고 있다. 외국은 물론 대부분의 국내 대기업과 중ㆍ소기업에서는 사운을 내걸고 인터넷 비즈니스 시스템(IBS : Internet Business System)에 대한 투자를 감행하고 있으며, 또한 수많은 개인 업자(SOHO)들도 인터넷 비즈니스(IB)를 통하여 창의적인 신규 사업에 뛰어들고 있는 실정이다. 이러한 인터넷 비즈니스(IB)는 고객에게 가치 있는 무엇인가를 제공해 줄 수 있어야하며, 그 대가를 인터넷을 통해 보상받을 수도 있어야 한다. 이러한 원리 속에서 인터넷은 경제적, 기술적인 도약을 통해 급속도로 확산되리라는 것이 전문가들의 공통적인 전망이다. 또한, web을 통한 자동차 정비업소 경영 정보관리 시스템과 같은 ASP(Application Service Provider)에 많은 관심이 쏠리고 있다 본 연구는 중소 업체를 향한 인터넷 이용 경영 정보관리 시스템이 현재는 미약한 실정임을 파악, 이런 시대적 요구사항과 필요성에 의해 Web을 이용한 자동차 정비업소 경영 정보 시스템을 개발한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.37 no.5B
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• pp.395-404
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• 2012

In this paper, we analyze and develop standard protocols for WAVE Networking Services described by IEEE 1609.3 which is one of standards for Intelligent Transportation Systems. In particular, we develop 'WAVE Management Entity(WME)' and 'WAVE Short Message Protocol(WSMP)'. For verification of development, we also develop Traffic Management System and RSU Manager, then we present results of verification by Traffic Management System in the car accident scenario.

• Proceedings of the KSR Conference
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• 2002.10a
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• pp.31-37
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• 2002

Rail cars are subject to vibration, impact and wear which can cause severe defects leading to a fatal accident. Thus, they are designed and manufactured in consideration of such factors influencing their service lifetime. Under-frames are composed of steel and support most of load imposed on the car. Steel is very sensitive to corrosive environment and corroded even in a normal service condition. Regular maintenance can Protect steel Parts from corrosion by painting. However, an exposure of defect point to corrosive agents can make corrosion proceed to a considerable depth, which may cause the structure to remain under safety standard. It is necessary to understand corrosion behavior of rail cars in order to estimate unexpected accidents by corrosion.