• The Journal of the Korea institute of electronic communication sciences
• /
• v.12 no.5
• /
• pp.883-890
• /
• 2017

Among the augmented reality services, the most frequently used services are marker based augmented reality services. However, there is a problem that the augmented reality service can not be provided in an environment in which the marker image can not be recognized. In this paper, we propose a method to provide more stable service by estimating the user's posture even if the marker image can not be correctly recognized due to occlusion, obstacle or marker damage in the marker based augmented reality. In the proposed method, when a failure occurs in the provision of a marker based augmented reality, the attitude of the user is estimated using the 3-dimensional coordinates measured through communication between the three beacons and the user, and it allows the user to receive the augmented reality service continuously. We describe the scenario of augmented reality technique using proposed marker recognition and beacon communication, and present the results of experiments based on the degree of occlusion and damage.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2013.10a
• /
• pp.207-210
• /
• 2013

Recently, rapid innovation of Smartphone is changing the paradigm of our daily life. Smartphone users, opinion experts more than 99 percent of the economically active population is using, it has reached the saturation past the early stages of formation. Smartphone is equipped with a general purpose OS possible the implementation of high performance environment similar level as a personal computer. Also, it is a mobile communication terminal scalable which can be removed or installed various applications. Such extensibility, it is possible to use different applications through the Apps store. In addition, it is also possible various services which are location based service. However, these services also benefit many but it also has a disadvantage of invasion of privacy and disclosure of personal information. In this research, we aim to analyze factors influencing on perceived value and risk in location based service of Smartphone. In addition, we aim to analyze the causal relationship with perceived value and risk in satisfaction and recommendation intention. This study suggests practical and theoretical implications based on the results.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.24 no.6B
• /
• pp.997-1003
• /
• 1999

It is required that synchronization model can describe various multimedia objects flexibly in the view point of time relationship and also respond quality of service requirement about jitter which is time difference between intramedia and skew which is time difference between intermedia. es desirable quality of service requirement. Proposed model applies maximum jitter and skew values which can be allowed, and then it presents high quality of service and real applies maximum jitter and skew values which can be allowed, and then it presents high quality of service and real time characteristics. In this paper we expend Petri-net and propose new synchronization specification model and apply two analysis method of Petri-net to prove oIn this paper we suggest multimedia synchronization model that is based on the Petri-net and servicur model suggested. We compared with other models and showed high QoS.

• Journal of the HCI Society of Korea
• /
• v.12 no.4
• /
• pp.57-64
• /
• 2017

The user-centered design paradigm shift and the emergence of user-experience design have also increased the importance of user experience with products and services in specific spaces. In addition, with the advent of IoT services, new changes in the future work environment are expected. This study aims to propose a new user experience design considering the context of future work space. First of all, we examined the concept and nature of IoT, and defined various factors that affect the future work environment and grasped the relation of each element. Next, user research in the current work environment was conducted to identify the context that affects the behavior of users in various types of work environments, and to insight the possibility of a new user experience in the future work environment. Based on the above analysis and insights, various context models for a new future work environment were constructed, and UX models and UX scenarios and alternatives were presented. This study will contribute to the diversity of UX design research by expanding the viewpoint of UX design from device to space and context, and it will contribute to the collaborative research with space design and service design, also interdisciplinary research with IoT service related field.

• Journal of Convergence for Information Technology
• /
• v.10 no.7
• /
• pp.7-13
• /
• 2020

IoT which is the core IT of the 4^th industrial revolution, is providing various services from users in the conversion with other industries. The IoT convergence technology is leading the communication paradigm of communication environment in accordance with the increase of convenience for users. However, it is urgently needed to establish the security measures for the rapidly-developing IoT convergence technology. As IoT is closely related to digital ethics and personal information protection, other industries should establish the measures for coping with threatening elements in accordance with the introduction of IoT. In case when security incidents occur, there could be diverse problems such as information leakage, damage to image, monetary loss, and casualty. Thus, this paper suggests a certificate management technique for safe control over access in IoT-based Cloud convergence environment. This thesis designed the device/user registration, message communication protocol, and device renewal/management technique. On top of performing the analysis on safety in accordance with attack technique and vulnerability, in the results of conducting the evaluation of efficiency compared to the existing PKI-based certificate management technique, it showed about 32% decreased value.

• Journal of Advanced Navigation Technology
• /
• v.19 no.1
• /
• pp.80-84
• /
• 2015

This paper suggested an error detection process based on multimedia computer supported cooperative works (CSCW) for industry safety environment. This system is suitable for detecting software fault for multimedia CSCW. It is necessary of detecting an error for the system to be protected by reactivity of media service instance instead of breaking process of session. This paper describes a performance analysis of an error detecting system of function comparison of proposed method with other method based multimedia CSCW for explosives as an example of industry safety environment.

• The KIPS Transactions:PartC
• /
• v.13C no.4 s.107
• /
• pp.455-460
• /
• 2006

Currently, the IETF group is working on service differentiation in the Internet. However, in wireless environments such as Ad-hoc networks, where channel conditions are variable and bandwidth is scarce, the Internet differentiated services are suboptimal without lower layers' support. The IEEE 802.11 standard for Wireless LANs is the most widely used WLAN standard today. 1t has a mode of operation that can be used to provide service differentiation, but it has been shown to perform badly. In this paper, we present a new service differentiation scheme for support QoS in the wireless IEEE 802.11, which is based on a multiple queuing system to provide priority of user's flow. We simulate and analyze the performance of our algorithm and compare its performance with the original IEEE 802.11b protocol. Simulation results show that our approach increases overall throughput in the MAC layer.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.11 no.1
• /
• pp.131-138
• /
• 2007

Plain old Web Services came true a services integration with use the XML that will be able to define a platform-independent document format in basic document format. Hut, the XML document decreases the efficiency of the whole application program with connects frequently in relatively slow communication media like network environment, embedded system or use the resource limited small-sized instrument like mobile. In this paper, we implemented the algorism of Fast Infoset, which can convert XML into Fast XML using the Fast Inoset method and PER encoding rules in ASN.1 and constructs Test Bed. Also, it is compared with the existing pure XML message method in difference of process performance after encoding SOAP messages of XML basis when constructing web service.

• Annual Conference of KIPS
• /
• 2013.11a
• /
• pp.1479-1482
• /
• 2013

공공기관에서는 인터넷 방송 서비스를 통해 문자, 그림, 사진, 영상, 음악 등 다양한 멀티미디어 정보를 제공하고 있다. 일반 지상파 tv방송과는 달리 공공 인터넷 방송은 양방향으로 커뮤니케이션이 가능한 웹 미디어 플랫폼을 통해 실시간으로 정보를 주고 받을 수 있을 뿐만 아니라 이용자가 원하는 정보를 주문하고 서비스를 받을 수 있어 공공기관과 이용자간 소통수단으로 활용되고 있다. 그러나 공공 인터넷 방송의 시청률과 참여하는 양방향 콘텐츠의 다양성 측면을 분석해 보면 예상과 달리 이용실적이 저조한 것으로 나타나고 있다. 이러한 문제의 주요한 원인으로는 근래에 들어 확산되고 있는 스마트 모바일 환경에 실시간으로 대응하여 공공미디어 서비스를 제공하지 못하는 공공미디어 접근성의 한계와 인터넷이라는 양방향 미디어 플랫폼을 지향하면서도 제공하는 공공콘텐츠는 공급형 중심의 콘텐츠 성격을 벗어나지 못한다는 점을 들 수 있다. 본 논문에서는 이러한 공공 인터넷 방송의 문제점을 사용자 접근성과 양방향 콘텐츠 활성화라는 측면에서 분석하였다. 그 결과 공공 인터넷 방송 플랫폼의 개방성이 필요한 것으로 나타났으며, 다양한 스마트 모바일 환경에서 공공콘텐츠의 생산, 게시, 공유가 자유로운 공공 미디어 플랫폼 형태가 필요한 것으로 나타났다. 이를 바탕으로 HTML5, SNS플랫폼 연계 등이 포함된 개방형 공공 미디어 플랫폼 모델을 정의하고 이를 기반으로 양방향 공공콘텐츠를 활성화 할 수 있는 공공 미디어 서비스 모델과 이를 구현한 구축 사례를 제시하였다.

• 한국IT서비스학회:학술대회논문집
• /
• 2009.05a
• /
• pp.559-568
• /
• 2009

현대 생활에서 u-Health는 특히 우리나라에서 Ubiquitous 와 Wellness의 개념을 접목하여 구현 하고 있으며, 현재 앞선 IT기술과 활성화된 Network 기반의 환경을 활용하여 발전된 결과를 도출 하려 하고 있다. 하지만 u-Health 장비 또는 프로그램에서 3D시뮬레이션 기법이 어떻게 쓰이면 그 활용도가 증가 되고, 올바른 활용 방법인가에 대해서 연구는 시작 단계라고 할 수 있다. 이에 현재 가정용 게임기와 일부 기능성 컨텐츠에서 쓰이는 3D 시뮬레이션 기법에서 체력증진을 위한 단계별 학습법과 신체 부분별 시뮬레이션에 효과적인 방법을 개발 정형화 시키고 시뮬레이션시 사용자와 가상의 시뮬레이터간의 상호작용 시 발생하는 문제점을 파악하고 해결 방안을 제시 하도록 하며, 3차원 3D기법 과 S/W 를 통하여 상호 작용을 할 때 체계적인 건강증진 방법과 건강관리방법을 제시 하고, 3차원 시뮬레이터를 활용 할 때 효과적인 항목과 결과 데이터를 통하여 발전적인 활용 방안을 제시 한다.