• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2007년도 추계 종합학술대회 논문집
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• pp.582-585
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• 2007

그리드란 지역적으로 분산되어 있거나 혹은 다양한 조직(organization)에 소속된 여러 자원들을 네트워크로 연동하여 사용자들에게 하나의 자원처럼 이용할 수 있는 인프라스트럭쳐이다. 전통적으로 그리드 상에서 작업관리 서비스는 작업을 제출하고 모니터링 하는 중요한 역할을 하고 있으며, 자원 정보 서비스와 데이터 전송 및 관리 서비스와 더불어 중요한 요소 중의 하나이다. 본 논문에서는 TIGRIS 상에서 작업 관리 서비스의 설계 및 구현 방법을 제시한다.

• 한국정보통신학회논문지
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• 제16권12호
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• pp.2628-2634
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• 2012

온실가스(green house gas: GHG) 감시는 지구의 기후변화를 방지하기 위해 필수적인 수단이 되고 있다. 기존 연구에서 글로벌 인프라인 NGN(next generation network)을 통해 온실가스감시를 수행하기 위한 서비스 시나리오가 제시되었으나 추상적인 단계에 머무르고 있어서 실제로 NGN에 적용하는 데에는 어려움이 있다. 본 논문에서는 NGN 내에 탑재될 기능들을 중심으로 온실가스감시서비스 시나리오를 제시하여 실제 NGN에서 적용이 가능하게 하기 위한 기반을 제공한다.

• Journal of Information Processing Systems
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• 제5권1호
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• pp.25-32
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• 2009

It is absolutely essential to implement advanced IP network technologies such as QoS, Multicast, High Availability, and Security in order to provide real-time services like IPTV via IP backbone network. In reality, the existing commercial networks of internet service providers are subject to certain technical difficulties and limitations in embodying those technologies. On-going research efforts involve the experimental engineering works and implementation experience to trigger IPTV service on the premium-level IP backbone which has recently been developed. This paper introduces the core network technologies that will enable the deployment of a high-quality IPTV service, and then proposes a suitable methodology for application and deployment policies on each technology to lead the establishment and globalization of the IPTV service.

• 한국통신학회논문지
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• 제30권2B호
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• pp.11-20
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• 2005

Strict priority scheduling scheme is a good candidate for the implementation of service differentiation in an Internet because of simplicity in implementation and the capability to guarantee the delay requirement of the highest class of traffic. However, it is also blown that strict priority starves the lower-class traffic at the cost of prioritizing the higher-class traffic. The purpose of this work is to propose an analytic method which can estimate the average delay performance of Diffserv service architecture and shows that strict priority scheme does not sacrifice the lower class traffic over a diverse condition of the load. From the numerical experiments for three-class Diffserv network we validate our argument that strict priority scheme may be applied to a service differentiation scheme for the future Internet.

• 한국IT서비스학회지
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• 제6권1호
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• pp.17-30
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• 2007

The rapid development of information and communication technologies has resulted in rapid increase in the qualitative and quantitative information that can be accessed by information technology. Furthermore an enormous amount of information is provided in various formats. However, there are a group of people who are not able to even approach to targeted information due to physical or environmental problems. Visually handicapped users constitute a class of these users. In this paper, a method of developing user interface for web-based education service is described for the visually handicapped users to access information more efficiently. First, this paper analyzed the problems of visually handicapped users to access information targeting representative domestic sites that supply education services. And based on the results of the above analyses, Nest, this paper explains the web-based education service interface implementation method according to types of the content to be delivered. Lastly, the validity of this method is provided by testing a web page based on the implementation method according to the types of content.

• 인터넷정보학회논문지
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• 제25권1호
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• pp.167-176
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• 2024

챗봇서비스는 AI서비스와 연계하여 다양한 분야에서 활용되고 있다. AI에 대한 보안 연구는 초기 단계이고, 이를 이용한 서비스 구현단계에서의 실질적인 보안 연구는 더욱 부족한 상황이다. 본 논문은 AI서비스와 연계된 챗봇서비스에 대한 보안요구사항을 분석한다. 먼저, 본 논문에서는 최근 발표된 AI보안에 대한 논문과 자료들을 분석한다. 시장에서 서비스가 제공되는 있는 챗봇서비스를 조사하여 일반적인 구현 모델을 정립한다. 구현 모델에는 챗봇관리시스템과 AI엔진이 포함된 5개의 구성요소가 포함되어 있다. 정립된 모델에 기반하여 쳇봇서비스에 특화된 보호자산과 위협을 정리한다. 위협은 실제 운영중인 챗봇서비스 담당자 설문을 통해 챗봇서비스에 특화된 위협을 중심으로 정리한다. 10개의 주요 위협이 도출되었다. 정리된 위협에 대응하기 위해 필요한 보안 영역을 도출하였고, 영역별로 필요한 보안요구사항을 분석하였다. 이는 챗봇서비스 보안 수준을 검토하고 개선하는 과정에서 보안평가 기준으로 활용될 것이다.

• 한국전자통신학회논문지
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• 제10권2호
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• pp.211-218
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• 2015

본 논문에서는 클라우드 컴퓨팅 서비스를 위한 가상 네트워크 구축에 필요한 중요 구성 요소 중의 하나인 가상스위치를 Intel DPDK(Data Plane Development Kit)를 이용하여 구현하고 DPDK에서 지원하는 가속화 가상스위치의 기능을 테스트 및 검증하였다. 최근 사물인터넷 등에서와 같이 지능형 IT 시스템들의 인터넷 접속을 통한 새로운 정보 서비스 플랫폼의 출현과 그에 대한 활용 및 응용 서비스를 기업 비즈니스에 적용하고자 하는 기업이 많아지고 있다. 기업들은 매우 빠른 소비자 환경변화에 민첩하게 대응할 수 있는 신규 서비스에 대한 사용자 입장에서의 클라우드 컴퓨팅 활용 측면으로 적은 비용으로 신규 서비스를 빠른 시일 내에 적용할 수 있다. 본 연구에서는 창조적 서비스 사업에 활용할 수 있는 스마트 클라우드 플랫폼 서비스를 효율적으로 구현하기 위한 고속 가상스위치를 Intel DPDK를 이용하여 구현하고 그의 기능 검증에 대한 연구를 수행하였다.

• 보건행정학회지
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• 제31권3호
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• pp.344-354
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• 2021

Background: The purpose of this study was to analyze the effect of national health insurance coverage of Chuna therapy in April 2019 on the costs and service uses in automobile insurance. Methods: This study used the claim data from Health Insurance Review and Assessment Service. A total of 189,912 inpatients and 1,550,497 outpatients who received Chuna therapy covered by automobile insurance in oriental medical institutions were included. The analysis period was from July 2018 to December 2019, and a total of 18 months before and after April 2019, when Chuna therapy was covered by national health insurance. Interrupted time series analysis was applied to analyze the impact on the costs and service uses of Chuna therapy in automobile insurance before and after April 2019. Results: From July 2018 to December 2019, for 189,912 inpatients the cost and the number of times for Chuna therapy per capita were increased by 22.0% and decreased by 7.3% respectively right after the implementation of the policy. In the case of 1,550,497 outpatients, the cost of Chuna therapy per capita tends to be increased by 0.4% in overall study periods and increased 28.4% immediately after the implementation of the policy. Meanwhile, the number of times and visits for Chuna therapy per capita tends to be increased by 0.4% in overall study periods but decreased by 0.4% after the implementation of the policy. Conclusion: Results suggest that if the national health insurance coverage of oriental medicine services increases according to the policy stance for benefit expansion in national health insurance, the criteria for providing national health insurance benefits should be considered with the comprehensive impacts on the costs and service uses of automobile insurance.

• 한국측량학회지
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• 제34권6호
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• pp.609-618
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• 2016

Since demand for location-based services increases and the relevant service becomes more diverse, the use of POI (Point of Interest) is being required in various fields. Various roles of POI for display, search and inquiry exist, but the implementation and expression of such roles are partially limited. Therefore, the data model for implementation is suggested in this paper to enable practical implementation, expression and inquiry of POI data. The data model was developed based on 3 roles of POI including search, expression and linkage, and especially, the spatial relationship between POI objects which was not suggested in previous data models is considered and time series scheme is suggested to enable various expressions and inquiries in application services.

• Journal of Information Technology Applications and Management
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• 제12권1호
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• pp.157-172
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• 2005

Recently, location-based service (LBS) is a hot issue in the field of computer applications. So many papers introducing new techniques of implementing a LBS and new application fields of LBS have been published recently. However, to the best of our knowledge, none of them discusses feasibility test in the prior to the implementation. The importance of a feasibility test for a design prior to the implementation cannot be overemphasized. This paper presents a method of feasibility test for a LBS design. Our method performs three steps. At the first step, we build a Petri net model of the LBS system which is depicted in natural language. The second step is to analyse the Petri net to find errors and flaws in the design. We also improve the Petri net model by fixing the errors and flaws in this step. A feasibility test is the third and final step. In this step. we verify if the design satisfies the user's requirement in the senses of quality of service (QoS) and of minimizing the implementation cost. The third step is performed in the manner of mathematical analysis of the Petri net.