• 해양환경안전학회:학술대회논문집
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• 해양환경안전학회 2004년도 추계학술발표회
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• pp.95-100
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• 2004

이 연구에서는 낙도보조항로의 운영실태와 발달과정에 대하여 정리하였다. 낙도보조항로는 14개 사업자가 27개 항로에서 총 30척 선박으로 낙도주민을 위한 안정적인 생활교통편의를 제공하고 있다. 항로별 수송실적을 분석한 결과, 전체적으로 이들 항로를 이용하는 여객 수도 매년 증가하는 추세에 있다. 선박 이용자의 서비스 만족도를 향상시키려고 한다면 운영사업체별로 경영평가제를 도입하는 등 보다 구조적인 변화가 요구된다. 본 연구를 통하여 얻어진 결과들은 낙도보조항로 중장기 발전방향 수립에 기초 자료로 활용하는 데 그 의미가 있다.

• 상하수도학회지
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• 제28권6호
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• pp.755-763
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• 2014

In this paper, a System Dynamics(SD) computer simulation model has been developed to assess the effects of developing and providing an alternate water source. A water service index was also developed to estimate the level of overall customer satisfaction on water supply service. Data from the Busan water supply service and the Korea Development Institute regarding the Nak Dong river bank storage development were utilized during the modeling processes. Some important indicators of the system under study were analyzed by the simulations of development of the alternate water source for Busan. The developed SD model and the water service index can be further utilized as a tool that can assess the extent and timing of an additional service improvement project.

• 해양환경안전학회지
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• 제11권1호
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• pp.83-88
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• 2005

이 연구에서는 낙도보조항로의 운영실태와 발달과정에 대하여 정리하였다. 낙도보조항로는 14개 사업자가 U개 항로에서 총 30척 선박으로 낙도주민을 위한 안정적인 생활교통편의를 제공하고 있다. 항로별 수송실적을 분석한 결과, 낙도보조 항로를 이용하는 여객 수가 매년 증가하고 있다. 선박 이용자의 서비스 만족도를 향상시키기 위해서 운영사업체별로 경영평가제를 도입하는 등 보다 구조적인 변화가 요구된다. 이 연구의 결과들은 낙도보조항로 중장기 발전방향 수립에 기초 자료로 활용하는 데 그 의미가 있다.

• 한국컴퓨터정보학회논문지
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• 제14권1호
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• pp.205-216
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• 2009

본 연구의 목적은 개별 제공하고 있는 안내전화서비스를 대표번호체계로 통합연계운영하고, 도로교통 정보외에 철도, 항공 버스 등의 대체교통수단 정보 및 관련기관과의 유기적 연계를 통한 원스톱(One stop) 서비스를 제공하는 안내전화서비스의 통합연계운영을 서비스를 제시하는데 있다. 이러한 목적을 달성하기 위하여 국내 외 현황을 분석하고, 시범구축, 확대구축, 안정화 및 고급화의 3단계에 따라 운영기술과 통합시스템 기술사양을 검토하였다. 본 연구를 통하여 교통정보 안내전화는 정보취득의 원스톱(One stop) 서비스, 이용 편의성 서비스, 다양한 연계정보제공 서비스, 제공정보의 실시간화 및 효율적인 체계를 구현할 것으로 기대한다.

• 한국IT서비스학회지
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• 제17권4호
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• pp.85-100
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• 2018

In this study, we formulated rational criteria to efficiently provide traffic information services via a crafted approach. By utilizing this, we presented a detailed traffic information service providing method that can overcome the limitations of existing link unit information provision system. Three methodologies such as user survey, data mining, and KHCM (Korea Highway Capacity Manual) utilization method were applied to formulate a rational expression standard for traffic information service. Each method was designed to establish a quantitative criterion for various traffic conditions and to enable user-oriented traffic information service in consideration of the traffic principal/compatibility. Considering the results of each methodological analysis in a comprehensive manner, the basic expression standards for traffic information service was formulated. Then we presented improvements such as traffic condition step by road, speed range of traffic condition, expression term of traffic condition and so on. In order to complement the problems of the information provision system of the existing link unit based on the derived improvement criterion, we presented the detailed traffic information service provision method by using the traffic speed data of the second order. And we applied this to the two links of Daegu city. The method presented in this research can improve the quality of traffic information service. Not only it can be used for various fields such as optimal route search, traffic safety service and so on.

• 통상정보연구
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• 제6권2호
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• pp.107-127
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• 2004

The rapid development of internet information technology has increased interest in e-Trade these days, but it is not activated greatly up to now. In order to promote e-Trade, it is essential to construct cooperative process such as connecting systems among trade related parties. Building e-Trade platform which is based on the infrastructure of the past trade automatic system is key point of promoting e-Trade. To do this, a study on the basic concept and specific components of e-Trade platform is needed absolutely. At this point of view, after this paper has examined domestic and foreign studies on the fundamental technologies about electronic commerce, it drew several key technologies that could be applied to e-Trade considering the current IT trend. Then it evaluates these technologies according to Technology Reference Model(TRM) of the National Computerization Agency. This will help us to show the operation strategy as well as the concept of future e-Trade platform and its composition. On the basis of the theoretical background, this paper classified NCA's technology model into 6 fields, which are application. data, platform, communication, security and management. Considering the key technologies, e-Trade platform has to be mutually connected and accept international standards such as XML. In the aspect of business side, trade relative agencies' business process as well as trading company's process has to be considered. Therefore, e-Trade platform can be classified into 3 parts which are service, infrastructure and connection. Infrastructure part is compared of circulating and managing system of electronic document, interface and service framework. Connecting service (application service) and additional service (application service) consist of service part. Connecting part is a linking mutual parts and can be divided into B2B service and B20 service. The organization operating this e-trade platform must have few responsibilities and requirements. It needs to positively accept existing infrastructure of trade automatic system and improving the system to complete e-trade platform. It also have to continuously develop new services and possess ability to operate the system for providing proper services to demanders. As a result, private sector that can play a role as TTP(Third Trust Party) is adequate for operating the system. In this case, revising law is necessary to support the responsibility and requirement of private sector.

• 한국항행학회논문지
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• 제22권2호
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• pp.96-104
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• 2018

NOTAM은 항공과 관련된 상태 정보를 항공종사자들에게 배포하는 공고문을 말한다. 국제민간항공기구인 ICAO는 SBAS 신호에 근거한 접근 절차를 사용하기 위해서는 SBAS 서비스에 대한 NOTAM 서비스를 제공해야 한다고 권고하고 있다. 이에, ICAO 권고사항을 준수하여 KASS가 APV-I 급 SoL 서비스를 제공하기 위해서는 SBAS 신호를 이용하여 착륙하는 모든 항공기에 NOTAM 서비스를 제공해야 한다. 때문에 이를 위한 KASS NOTAM 시스템 개발이 필요하다. 본 논문에서는 국내외 NOTAM 관련한 규정을 살펴보고 국내에서 일반적인 NOTAM 서비스 제공 현황을 분석하였다. 또한 이를 토대로 KASS NOTAM 서비스 제공 방안을 제시하였다. 그리고 국외 기 구축된 미국 WAAS와 유럽 EGNOS의 NOTAM 시스템 분석을 통하여 향후 개발될 KASS NOTAM 시스템의 구성 방안을 제시하고 구성 방안에 따른 주요 기능 요구 사항을 분석하였다.

• 한국컴퓨터정보학회논문지
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• 제21권4호
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• pp.31-38
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• 2016

The interface between servers and clients and system management in the cloud computing environment is different from the existing computing environment. The technology for information protection. Management and user authentication has become an important issue. For providing a more convenient service to users, SSO technology is applied to this cloud computing service. In the SSO service environment, system access using a single key facilitates access to several servers at the same time. This SSO authentication service technology is vulnerable to security of several systems, once the key is exposed. In this paper, we propose a technology to solve problems, which might be caused by single key authentication in SSO-based cloud computing access. This is a distributed agent authentication technology using a multiple SSO agent to reinforce user authentication using a single key in the SSO service environment. For user authentication reinforcement, phased access is applied and trackable log information is used when there is a security problem in system to provide a safe cloud computing service.

• 디지털산업정보학회논문지
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• 제6권4호
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• pp.95-105
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• 2010

DNS(Domain Name System) is a huge distributed database that converts host name to IP address. We are expecting the importance of DNS is more increased because many Internet application services appear according to the continuous increase of Internet users and nearly all the Internet application services use DNS. To prevent the interruption of DNS service, DNS server is configured with primary DNS server and a secondary DNS server which takes the place of primary DNS server in case of the service interruption. But this scheme is difficult for providing DNS service constantly in case of DDoS attack, which brings about much network load or network problems in DNS server group. Therefore, This paper proposed the scheme to locally distribute load of DNS server, and the use of address system to group the distributed DNS servers. Also, it proposed the authentication scheme of the correspondent server in case the server is changed in DNS server group having grouping address. In this paper, it is shown that the prosed scheme guarantees the improved service reliability with maintaining the present service performance through the evaluation. Through this, we can expect the high improved DNS service can be provided in the Internet environment in the future.

• 대한인간공학회지
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• 제31권5호
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• pp.657-670
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• 2012

Background: Today, numerous telematics technologies, i.e., technologies developed by integrating telecommunications with information processing, are applied in vehicles. One such developmental application of this technology to vehicles is to increase the safety or convenience of drivers by providing them with necessary information such as warnings and information on emergencies and traffic situations. However, under certain conditions, there is a high probability of traffic accidents if the driving workload is high. Nowadays, the navigation system is frequently used in the vehicles, this system provides various information including route to the driver. But, the existing navigation systems are not only considered a driver's reaction but also provide unilaterally to the information regardless of them. Such one-side information service type may miss important information to the driver. In addition, it sometimes interferes safety driving. Objective: To solve this problem, the intelligent navigation system needs to the providing way that it checks the driver's reactions after providing information. Namely, if the driver passes the information received from the navigation, then the intelligent system provides more loudly and more frequently. Method: Therefore, in this study we introduce the intelligent navigation system that it automatically controls modality type and its strength when the driver misses or overlooks the information for their safety and entertainment and we analyze the driver's cognitive responses about the modality type and its strength. Results: To evaluate the effectiveness of the proposed system, we analyzed the reaction time and driving workload for each type of the information, modality and its strength. Also we evaluated the users' subjective satisfaction and understanding based on a questionnaire.