• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2018년도 추계학술발표대회
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• pp.133-135
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• 2018

In these days, providing flexible and personalized network services subject to customers' requirements becomes an interesting issue for network service providers. Moreover, because each network service provider own finite network resources and infrastructure, dynamic network provisioning is essential to leverage the limited network resources efficiently and effectively for supporting personalized network services. Recently, as the population of mobile devices increases, the location-awareness becomes as important as the QoS-awareness to provision a network service dynamically. In this paper, we propose a framework for providing location-aware dynamic network services. This framework includes the web user interface for obtaining customers' requirements such as locations and QoS, the network generator for mapping the requested locations and network infrastructure, the network path calculator for selecting routes to meet the requested QoS and the network controller for deploying a prepared network services into SDN(Software-Defined Networking) enabled network infrastructure.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2007년도 추계학술대회
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• pp.469-474
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• 2007

This study presents service quality systems such as wedding ceremony service, postpartum care service, funeral home services, crematory services, cemetry and charnel grave services, and charnel house services. These service quality systems include process, infrastructure, and terminology.

• 정보화정책
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• 제17권2호
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• pp.45-67
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• 2010

본 연구는 유비쿼터스 컴퓨팅기술을 이용한 홈네트워크기반을 바탕으로 수요자중심의 전자정부서비스를 재설계하고자 한다. 전자정부의 핵심과제로 전자정부 로드맵 31대 과제가 추진되었는데, 이를 홈네트워크기반과 연계하여 제공된다면, 공급자와 수요자입장에서 어떤 정책과제가 우선되어야 하는지 설문조사를 통해 정책설계를 제언하고자 하였다. 전반적으로 홈네트워크기반에서 전자정부가 구현된다면, 행정업무의 효율성과 국민참여를 비롯한 대국민서비스의 개선이 이루어져야 한다고 보았다. 또한, 유비쿼터스정부를 구현함에 있어 홈네트워크기반을 강화하기 위해서 먼저, 정부는 홈네트워크기반을 활성화하는 법 제도를 정비하여야 하며, 관련 기술을 개발하도록 기업을 지원하고, 국민의 서비스 이용을 높이기 위한 안전한 인프라를 구축하여야 한다. 둘째, 기업은 다양한 컨텐츠의 홈네트워크기술을 개발하고, 국민이 전자정부서비스를 이용하기 쉽도록 홈네트워크시스템을 설계하여야 한다. 셋째, 국민은 홈네트워크기반의 전자정부서비스에 관한 관심과 참여가 있어야 하며, 정부와 기업이 제공하는 홈네트워크기기 및 인프라를 적극적으로 활용하여야 한다.

• Spatial Information Research
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• 제17권3호
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• pp.287-299
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• 2009

U-City의 계획, 건설 및 개발 후 운영 관리를 지원하기 위한 "유비쿼터스도시의건설등에관한법률(이하 u-City 법) 이 제정 공포되었다(2008.3.28). 본 법률을 근거로 한 국가주도 u-City도입의 궁극적 목표는 이미 선진국 궤도에 근접한 우리나라의 IT, 공간정보인프라를 적극 활용한 도시공간 이용 및 관리의 첨단화에 있다고 하겠다. 법에 의한 u-City의 정의는 물리적 도시기반시설에 u-City기술을 적용하여 u-City기반시설 화하고 이를 통해 다양한 u-City서비스를 제공하는 도시로 규정되어 있다. 그러나 현 법규정의 가장 핵심개념에 해당하는 u-City서비스, 기술 및 기반시설과 이들의 상호관계의 상세 정도로는 각 지자체의 특성과 역량에 맞는 도시기반시설지능화 및 이를 통한 u-City서비스 제공 등의 가이드 효과를 충분히 기대하기 어려운 실정이다. 따라서 본 연구의 목적은 안정적이고 만족도 높은 u-City서비스의 계획, 구축 및 운영관리를 위한 법제도 정비의 핵심사안의 하나로서 서비스-기술-기반시설간 상호관계 정립의 기본방향 및 추진전략을 제시하는데 있다.

• 한국IT서비스학회지
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• 제15권4호
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• pp.63-72
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• 2016

Critical infrastructure has been operating in a closed environment with a completely separate information system and in the private area. However, with the current ICT environment changes due to convergence and open platforms it has increased the threats and risks to critical infrastructure. The importance of cyber security is increasing in the infrastructure control system, such as the outbreak of Ukraine blackout in 2015 by a malicious code called 'black energy'. This thesis aims to recognize the importance and necessity of protecting the critical infrastructure service, designing a security framework reflecting environmental and characteristic changes, and analyzing the management system suitable for a security framework. We also propose a theoretical basis for constructing a new security framework by comparing and analyzing seven international security management system standards, such as NIST 800-82 and IEC 62443-2-1, which are used in the control system. As a result, the environment surrounding critical infrastructure changes with the characteristics of connectivity, openness, and finality was studied, and as a response to this, many scholars and institutions present critical infrastructure security frameworks as cycle enhancement type structures, risk management structures, and management domain expansion structures. In response, the security framework encompassing these structures, CISF (Critical Infrastructure Security Framework), was designed. Additionally, through the security related international standard and criterion analysis, as a newly designed security standard suitable for CISF, IEC 62443-2-1 is reviewed and suggestions are made.

• 한국IT서비스학회:학술대회논문집
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• 한국IT서비스학회 2008년도 추계학술대회
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• pp.119-122
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• 2008

해외(미국) 케이블방송 시장에서 제공되는 서비스와 주요기술 현황을 점검하고 향 후 서비스 환경 및 기술 변화에 대한 케이블방송 산업의 대응 전략을 알아보고자 한다. 또한, 본 연구에서는 향후 국내 케이블방송 산업 발전에 있어 고려 할 만한 시사점을 제안한다.

• 경영과학
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• 제11권1호
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• pp.129-144
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• 1994

B-ISDN(Broadband Integrated Services Digital Network)which is defined as a service or system requiring transmission channels capable of supporting rates above 1.5 Mbps has emerged as a new future telecommunication infrastructure. B-ISDN can integrate a wide range of services and the success of B-ISDN is crucially dependent on the development of user-needing application services. The purpose of this study is the conceptual development of B-ISDN application services. We survey on the kinds of B-ISDN service, classify application areas by user groups, and develop B-ISDN application services. Finally we categorize B-ISDN application services by their application areas and necessary services.

• 인간식물환경학회지
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• 제24권4호
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• pp.415-427
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• 2021

Background and objective: This study examined the changes in the cultural trend of use for green infrastructure in Seoul due to COVID-19 pandemic. Methods: The subjects of this study are 8 sites of green infrastructure selected by type: Forested green infrastructure, Watershed green infrastructure, Park green infrastructure, Walkway green infrastructure. The data used for analysis was blog posts for a total of four years from August 1, 2016 to July 31, 2020. The analysis method was conducted keyword frequency analysis, topic modeling, and related keyword analysis. Results: The results of this study are as follows. First, the number of posts on green infrastructure has increased since COVID-19, especially forested green infrastructure and watershed green infrastructure with abundant naturalness and high openness. Second, the cultural trend keywords before and after COVID-19 changed from large-scale to small-scale, community-based to individual-based activities, and nondaily to daily culture. Third, after COVID-19, topics and keywords related to coronavirus showed that the cultural trends were reflected on appreciation, activities, and dailiness based on natural resources. In sum, the interest in green infrastructure in Seoul has increased after COVID-19. Also, the change of green infrastructure represents the increased demand for experience that reflects the need and expectation for nature. Conclusion: The new trend of green Infrastructure in the pandemic era should be considered in the the individual relaxations & activities.

• Journal of Information Processing Systems
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• 제18권6호
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• pp.729-740
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• 2022

Netflix, Amazon Prime, and YouTube are the most popular and fastest-growing streaming services globally. It is a matter of great interest for the streaming service providers to preview their service infrastructure and streaming strategy in order to provide new streaming services. Hence, the first part of the paper presents a detailed survey of the Content Distribution Network (CDN) and cloud infrastructure of these service providers. To understand the streaming strategy of these service providers, the second part of the paper deduces a common quality-of-service (QoS) model based on rebuffering time, bitrate, progressive download ratio, and standard deviation of the On-Off cycle. This model is then used to analyze and compare the streaming behaviors of these services. This study concluded that the streaming behaviors of all these services are similar as they all use Dynamic Adaptive Streaming over HTTP (DASH) on top of TCP. However, the amount of data that they download in the buffering state and steady-state vary, resulting in different progressive download ratios, rebuffering levels, and bitrates. The characteristics of their On-Off cycle are also different resulting in different QoS. Hence a thorough adaptive bit rate (ABR) analysis is presented in this paper. The streaming behaviors of these services are tested on different access network bandwidths, ranging from 75 kbps to 30 Mbps. The survey results indicate that Netflix QoS and streaming behavior are significantly consistent followed by Amazon Prime and YouTube. Our approach can be used to compare and contrast the streaming services' strategies and finetune their ABR and flow control mechanisms.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2017년도 춘계학술대회
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• pp.747-749
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• 2017

악성코드 감염, 외부침입 등으로 인한 금융회사의 고객정보 유출, 기타 금융사고 발생에 대한 위험으로부터 금융거래를 보호하기 위해 금융위원회에서는 "금융전산 보안강화 종합대책"에서 업무망과 인터넷망 분리에 의한 안전한 금융거래와 고객정보 보호대책의 가이드라인을 제시하고 금융전산망 분리를 의무화시켰다. 이에 각 금융회사는 회사별 IT전산 환경에 맞는 물리적, 논리적 망분리 방법을 선택하여 망분리 시스템을 구축하고 있다. 본 논문은 전통적 범용장비의 구성과 최근 발전중인 가상화 기술 중 하나인 Hyper Converged를 통한 통합형 HCI(Hyper Converged Infrastructure) 방식에 대한 비교 및 사례 연구로 논리적 망분리 구축을 위한 효율적인 인프라 구성 방안을 제시한다.