• 전자공학회논문지CI
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• 제47권6호
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• pp.131-138
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• 2010

유비쿼터스 환경이 발전함에 따라 다양한 서비스들이 고객 중심의 서비스로 제공되고 있다. 기존에는 개인 프로파일을 기반으로 한 개인화 서비스의 연구가 진행되어 왔으나 사용자의 선호도를 파악하여 각 사용자에 대한 맞춤형 서비스를 지원하기 위해서는 상당한 데이터와 시간이 필요하다. 이러한 문제점을 해결하기 위하여 본 논문에서는 개인 프로파일을 통한 맞춤형 서비스가 아닌 사용자의 감정을 분석하여 그에 맞는 서비스를 제공하는 시스템을 제안한다. 제안하는 시스템에서는 사용자의 감정을 분석하기 위하여 영상 분석과 음성 분석의 두 가지 방식을 사용한다. 이러한 감정 분석 방법을 이용함으로써 제안된 시스템이 홈 네트워크 환경에서 사용자 맞춤 서비스를 효과적으로 제공할 수 있도록 구현하였다.

• 방송공학회논문지
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• 제13권4호
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• pp.528-543
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• 2008

Internet Protocol Television (IPTV)는 방송 통신 융합 서비스 실현을 위한 대화형의 개인 맞춤형 멀티미디어 서비스이다. TV에 연결되는 IPTV Set-Top Box (STB)는 사용자의 유일한(unique) 하드웨어 식별자로서 가입자 인증에 사용된다. 이것은 box-level의 식별방법으로 가족 구성원이 하나의 IPTV 서비스를 공유한다는 점에서 개인 맞춤형 서비스를 지향하는 IPTV의 목적에 적합하지 않다. 본 논문에서는 기존의 STB에 3G 이동통신의 오픈 플랫폼 자바카드를 기반으로 한 사용자 개인정보를 저장할 수 있는 IDENTITY 애플릿을 정의하여 3G 네트워크와 IPTV 응용서버 사이에 사용자 중심의 인증과 개인 맞춤형 서비스가 가능한 IPTV 인증 프로토콜을 제안하고, 이에 대한 효율성과 안전성에 대해 검증한다.

• 한국통신학회논문지
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• 제35권2B호
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• pp.313-324
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• 2010

통신과 방송 미디어 정보의 단순 융합으로 출발한 IPTV가 이제는 이용자 요구에 능동적으로 적응하는 개인형 IPTV 서비스 형태로 발전하고 있다. 본 논문은 IPTV 서비스의 개인화 및 사용자 중심의 서비스 기능을 제공하기 위하여 서비스 오버레이 네트워크 기반위에서 IPTV 서비스를 능동적으로 제어 관리하는 DSON 구조를 제안한다. 또한 능동적인 서비스 제어 기능을 수행하기 위하여 DSON을 이용한 커뮤니티 IPTV 서비스, DSON 기반 홈 IPTV 방송 서비스 모델들이 제안된다.

• 반도체디스플레이기술학회지
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• 제18권1호
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• pp.123-128
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• 2019

Currently mobile services are on the verge of full commercialization ahead of 5G mobile communication (5G). The first goal could be to preempt the 5G market through realistic media services utilizing VR (Virtual Reality) and AR (Augmented Reality) technologies that users can most easily experience. Basically this movement is based on the advanced development of smart devices and high quality graphics processing computing power of mobile application processors. Accordingly, the importance of mobile GPUs is emerging and the most concern issue becomes a model for predicting the power and performance for smooth operation of high quality mobile contents. In many cases, the performance of mobile GPUs has been introduced in terms of power consumption of mobile GPUs using dynamic voltage and frequency scaling and throttling functions for power consumption and heat management. This paper introduces several studies of mobile GPU performance prediction model with user-friendly methods not like conventional power centric performance prediction models.

• 한국IT서비스학회지
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• 제14권2호
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• pp.129-142
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• 2015

The purpose of this study is to suggest an effective regression testing method in order to minimize the scope of test resulting from the modification of software and to prevent mismatch of test case and test objects. As a way to improve the efficiency of regression testing which uses a change-centric testing technique, the method flow is analyzed and grasped through a static analysis based on source code in order to identify modified parts. After the order of priority is set according to the results of user action log-based dynamic analysis on identified regression testing objects, test effect can be raised by adjusting the order of priority using code complexity. Quality assurance coverage can be checked using the user action log suggested in this study, and the progress of test and whether or not each function has been verified can be checked, too. In addition, by minimizing test parts and adjusting the order of test, costs and time can be saved, making it possible to conduct regression testing effectively.

• 한국CDE학회논문집
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• 제18권6호
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• pp.428-438
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• 2013

The requirement for high performance visualization of engineering analysis of digital products is increasing since the size of the current analysis problems is more and more complex, which needs high-performance codes as well as high performance computing systems. On the other hand, different companies or customers do not have all the facilities or have difficulties in accessing those computing resources. In this paper, we present a multi-view supporting VR/AR system for providing supercomputing-based engineering analysis services. The proposed system is designed to provide different views supporting VR/AR visualization services depending on the requirement of the customers. It provides a sophisticated VR rendering directly dependent on a supercomputing resource as well as a remotely accessible AR visualization. By providing multi-view centric analysis services, the proposed system can be more easily applied to various customers requiring different levels of high performance computing resources. We will show the scalability and vision of the proposed approach by demonstrating illustrative examples with different levels of complexity.

• 한국IT서비스학회지
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• 제11권3호
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• pp.161-175
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• 2012

A novel concept of ICT based service, which is called N-device service, is proposed and implemented in the form of N-device smart education services. The N-device services are different from the existing N-screen services in terms of the number of devices a user is using for a specific service at the same time. A N-device service consists of several smart devices which are different in size, software and hardware platform, mobility, manufacturer and the like by fully utilizing the characteristic of each device. The major and unique features of N-device services are analyzed and depicted in a strict way. Those are shared role for each device, service by configurable device, one sensor multiple use, real-time data sharing, role shifting and new market creation. It is turned out that the N-device service is more human centric compared with existing ICT based services and can give richer digital experience to users because non-existent services become possible with the new concept. However, there exist several barriers to be implemented and commercialized in the real world. Those include high development cost and time, small market and different application platforms of devices. These barriers can be overcome by technical advances and cooperation between relevant parties. The smart education is very prominent area, in which the novel concept can be applied with high priority because Korean government announced its plan to boost up new educational services with big budget and these are acceptable by enthusiastic Korean parents and students. That's why the N-device service is implemented in the education area, which is called as "livessam(live teacher)," with four smart devices, IPTV, tablet PC, PC and smart phone. By providing both detailed service scenario and techniques, we shows that the novel education service is technically feasible and acceptable by teachers and students.

• 한국산업정보학회:학술대회논문집
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• 한국산업정보학회 2001년도 춘계학술대회논문집:21세기 신지식정보의 창출
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• pp.1-10
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• 2001

SNMP 통신망 관리프레임워크를 제시한 SNMPv3는 데이터 인증, 암호기능 및 재사용 방지, 세분화된 접근통제 등 개선된 보안서비스를 제공함으로써, 이전 SNMP 버전에서 제공되지 않았던 안전한 통신망 관리를 위한 기반기술을 제공하고 있다. 그러나, 이와 같은 SNMPv3의 개선된 보안서비스에도 불구하고 통신망에 대한 보안관리정보가 여러 시스템에 분산되어 있는 특성으로 인해 통신망을 운용하는 기관의 일관성있는 보안정책의 기술과 실행에 문제점이 있다. 본 논문에서는 SNMPv3가 제공하지 못하는 보안정책기반의 중앙집중형 보안관리기능과 효과적인 통신망 관리권한 부여를 위한 역할기반 보안관리모델을 제시한다.

• 한국정보컨버전스학회:학술대회논문집
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• 한국정보컨버전스학회 2008년도 International conference on information convergence
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• pp.135-140
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• 2008

Recently in the Mongolian wireless marketplace, many E-commerce companies have been making considerable investments in the technological development of M-commerce, taking competitive advantage of new business possibilities offered by Internet-based wireless technologies. In the Mongolian wireless marketplace, this new mobile environment opens the door for new and exciting market opportunities in mobile services and applications. In the near future, these companies will be looking toward M-commerce services as a supplemental source of revenue in the mobile marketplace. This paper examines the roles of M-commerce in the consumers' in order to promote the consumers' loyalty in the booming M-commerce. This paper contains theory that focuses on the basic concepts of the M-commerce environment, its wireless network technologies, and its applications infrastructure. Upon searching for references to assist us in establishing a market hypothesis, we discovered that few comprehensive studies on consumer perspective and behavior related to M-commerce services actually exist in the literature. In the area of M-commerce, many companies neglect the consumer perspective, concentrating only on technological factors only when formulating their market strategies. And, due to technological blindness, many companies were not able to succeed in end-user E-commerce services. Given that fact, this paper formulates a consumer-centric research model. In order to prove the research model, we chose the survey method which allows for the collection of large amounts of data from a sizeable population in a highly economical way. Through the survey, this paper defines consumer's attitudes towards M-commerce services by identifying potential Business-to-Commerce(B2C) applications and its primary target groups in terms of gender and age, and by investigating whether consumers recognize the value proposition of M-commerce applications and services. As shown in the data analysis and results, this research concludes that M-commerce development in Mongolia is still at its infancy, and that the implementation of M-commerce depends not only on technological progress, but also on consumer attitudes and their willingness to adopt M-commerce services. As well, other complex cross-cultural factors-socially, economically, culturally, et cetera-enter strongly into the equation.

• 정보처리학회논문지A
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• 제16A권5호
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• pp.389-394
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• 2009

이동하면서도 디지털 방송을 볼 수 있는 모바일 TV가 세계에 보급되기 시작하였다. TV 또는 HDTV와 같은 대화형 데이터 서비스를 제공 하기 위해서 데이터 표현, 전송 및 처리가 아주 중요하다. 특히 제한된 대역폭과 낮은 성능의 단말과 같은 모바일 방송통신 환경에서 오디오, 비디오, 이미지 등의 다양한 멀티미디어 서비스를 제공 받기 위해서는 효율적으로 전송 및 적응형 데이터 서비스 기술이 필수적으로 요구된다. 본 논문에서모바일 환경에서 사용자 중심으로 비디오서비스 대한 미들웨어 기술을 효율적으로 개발하기 위하여 사용자 환경상황인식(Usage Environment), 개인화(Personalization)를 위한 데이터 수정 및 처리 기술, 사용자 중심으로 맞춤형 적응 서비스 미들웨어 UP-SAM(User Personalization Context-Aware Service Adaptation Middleware) 모델을 제안한다.