• 전기전자학회논문지
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• 제22권4호
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• pp.1147-1151
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• 2018

사용자들이 언제 어디서든 콘텐츠를 생성하고 공유함에 따라 CCN이라고 하는 새로운 네트워킹 구조가 등장하게 되었다. CCN은 IP 주소가 아닌 콘텐츠 이름 자체를 패킷 식별자로 사용하는 방식을 취하고 있다. 그러나, 현재 CCN 프로토콜은 콘텐츠 소스의 이동성을 지원하는데 문제를 갖고 있으며, 이로 인해 패킷 전달시 긴 전송 지연과 긴 서비스 단절 문제를 나타낸다. 이러한 문제점들을 해결하기 위해, 계층적 이동성 관리 방안이 제시되었으나, 이 또한 interest 패킷의 손실과 긴 핸드오프 지연이라는 문제를 갖고 있다. 따라서 본 논문에서는 하이브리드 형태의 이동성 관리 방안을 제시하며, 성능 분석으로 제안 방안이 감소된 제어 오버헤드의 손실율을 가짐을 확인할 수 있었다.

• 경영정보학연구
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• 제24권2호
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• pp.67-88
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• 2022

본 연구는 SOR(Stimulus-Organism-Response) 모델을 기반으로 퍼스널 모빌리티의 성능적 측면과 외부 환경적 요인을 고려해 이용자들과 비이용자들의 사용 의도를 설명할 수 있는 연구 모형을 제안하였다. 국내 사용자들과 비사용자들을 대상으로 설문조사를 진행하였고 부분최소자승법(Partial Least Square, PLS)과 인공신경망 분석(Artificial Neural Network, ANN)을 통해 연구모형 및 가설들을 검증하였다. 분석결과, 사용자들은 지각된 만족도와 지각된 신뢰도가 사용 의도에 긍정적인 영향을 미치고, 지각된 위험성과 환경적 가치가 지각된 만족도와 지각된 신뢰도와 유의한 관계가 있음이 확인되었다. 반면, 비사용자들은 지각된 만족도와 사용의도 간에 양의 상관관계가 있음이 밝혀졌고, 사용자들과 마찬가지로 지각된 위험성과 환경적 가치가 지각된 만족도와 지각된 신뢰도의 유의한 선행변수임이 검증되었다. 나머지 변수들 중에서는 사용자들의 지각된 이동성과 비사용자들의 지각된 이용 용이성이 각각 지각된 만족도의 중요한 영향요인으로 파악되었다.

• 한국IT서비스학회지
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• 제20권5호
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• pp.73-87
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• 2021

The COVID-19 pandemic has brought about many changes in our daily lives and in industries as a whole. The most notable change was the spread of the untact culture to minimize face-to-face contact. The spread of the untact culture has changed the use of public transportation. Looking at the results of previous SARS and MERS studies, it was found that as the pandemic spreads, the use of public transportation decreased. Recently, the mobility sharing service is attracting attention as a personalized means of transportation instead of public transportation. Therefore, in this study, the factors affecting the intention to use the mobility sharing service were to be identified by the actual users. In this study, economic benefit, convenience, sustainability, and sense of belonging were set as independent variables based on previous studies. In addition, the relationship between the perceived usefulness and perceived pleasure of these factors of use on intention to use was empirically analyzed through PLS-SEM. As a result of the study, it was found that economic benefits, convenience, sustainability, and sense of belongingness had a significant effect on intention to use through perceived usefulness and enjoyment. This study was meaningful in that it was verified through the study that economic benefits, convenience, sustainability, and a sense of belongingness were significant variables affecting the intention to use through usefulness and pleasure.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.1435-1439
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• 2004

Most recently, CP(Cellular Phone) has been one of the most important technologies in the IT(Information Tech-nology) field, and it is situated in a position of great importance industrially and economically. To produce the best CP in the world, a new technological concept and its advanced implementation technique is required, due to the extreme level of competition in the world market. The RT(Robot Technology) has been developed as the next generation of a future technology. Current robots require advanced technology, such as soft computing, human-friendly interface, interaction technique, speech recognition, object recognition etc. unlike the industrial robots of the past. Therefore, this paper explains conceptual research for development of the RCP(Robotic Cellular Phone), a new technological concept, in which a synergy effect is generated by the merging of IT & RT. RCP infra consists of $RCP^{Mobility}$ $RCP^{Interaction}$, $RCP^{Integration}$ technologies. For $RCP^{Mobility}$, human-friendly motion automation and personal service with walking and arming ability are developed. $RCP^{Interaction}$ ability is achieved by modeling an emotion-generating engine and $RCP^{Integration}$ that recognizes environmental and self conditions is developed. By joining intelligent algorithms and CP communication network with the three base modules, a RCP system is constructed. Especially, the RCP mobility system is focused in this paper. $RCP^{Mobility}$ is to apply a mobility technology, which is popular robot technology, to CP and combine human-friendly motion and navigation function to CP. It develops a new technological application system of auto-charging and real-world entertainment function etc. This technology can make a CP companion pet robot. It is an automation of human-friendly motions such as opening and closing of CPs, rotation of antenna, manipulation and wheel-walking. It's target is the implementation of wheel and manipulator functions that can give service to humans with human-friendly motion. So, this paper presents the definition, the basic theory and experiment results of the RCP mobility system. We confirm a good performance of the RCP mobility system through the experiment results.

• 한국멀티미디어학회:학술대회논문집
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• 한국멀티미디어학회 2003년도 추계학술발표대회(상)
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• pp.445-448
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• 2003

During a time when cellular systems are being deployed in massive scale worldwide, international roaming is becoming increasingly important. This paper presents UIM (User Identification Module) for mobility support, authentication, and service portability between different mobile systems. We also introduce network model based on PASM(Portable Authentication and Mobility Service Machine) which will support signaling protocol and user information conversions with database for roaming between different mobile networks. Stored data types and elements in UIM, logical data structure and configuration, and registration procedures are described here in the case of DCN (Digital CDMA (Code Division Multiple Access) Network System) and GSM (Global System for Mobile Communications).

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2002년도 추계학술대회논문초록집
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• pp.340.1-340
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• 2002

The unbalance exciting force induced by HDD of lately getting higher speed is directly influenced by the rotational speed and the mechanical assembly allowance between disk and spindle motor, and which gives rise to the structure borne noise of the personal computer. The absolute unbalance mass of HDD needs to be measured and adjusted by the counter mass to control the unbalance exciting force effectively in the stage of assembling the disk and spindle motor. This study introduces the measurement methods of the magnitude of the absolute unbalance mass and the position of HDD by 2 accelerometers. The absolute unbalance mass can be obtained by the acceleration responses and the mobility of the mechanical part, while the position of the unbalance mass can e obtained by the rotation acceleration orbit.

• 지식경영연구
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• 제16권1호
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• pp.117-142
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• 2015

Recently, the personal cloud computing service has been being spotlighted as an individual tool of productivity enhancement. However, compared to the rosy forecast, its diffusion rate in the domestic (Korean) market is much slower than expected. In order to find the reason for the slow growth of personal cloud computing service, we attempt to identify influencing factors on user's adoption resistance, while most prior research has focused on the factors affecting its adoption. Based on both the person-technology fit model and the privacy calculus model, we propose technostress and perceived value as key antecedents of adoption resistance. In addition, we identify (1) technical (pace of change and complexity) and personal (self-efficacy) influencing factors on technostress, and (2) beneficial (perceived mobility and perceived availability) and harmful (perceived vulnerability) influencing factors on perceived value. To validate our research model, 133 individual samples were gathered from undergraduate and graduate students who had actual experience of using at least one of personal cloud computing services. The results of the structural equation modeling confirm that both technostress and perceived value have significant effects on adoption resistance, but they have different influencing mechanisms to different types of adoption resistance (indifference, postponement, and rejection). Theoretical and practical contributions are discussed in the conclusion.

• 디지털산업정보학회논문지
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• 제12권1호
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• pp.81-87
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• 2016

Cloud computing technologies are utilized and merged in various domains. Cloud computing technology-based personal cloud service technologies provide mobility and free access by using user centered storages and smart devices such like smart phones and table PCs. Therefore, we should overcome limits on the storage by solving the capacity problems of devices to provide security services in the personal cloud environments It can be addressable to provide the convenience of various security technologies. However, there are some security threats inherited from existing cloud environments and the possibilities of information leakage when devices are lost or stolen. Therefore, we designed a framework for providing secure cloud services by adding objects, such as user authorization, access tokens, set permissions by key generation, and key management assignments, for user management in personal cloud environments. We analyzed the stability of the proposed framework in terms of irreverent use and abuse, access to insiders, and data loss or leakage. And we evaluated the proposed framework in terms of the security with access control requirements in personal cloud environments.

• 대한지리학회지
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• 제30권2호
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• pp.120-131
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• 1995

이동행태를 분석하기 위해 시.공간이론 중 3가지 제약조건인 능력제약, 조합제약, 권위제약이 공간특성에 따라 성별, 연령이 이동에 어느 정도 영향을 주는지를 분석하고 적 정 이동군집수를 결정하고자 한다. 이중 권위제약은 사회적 제약조건으로서 도시시설물이나 교통수단의 이용에 있어 사회적 신분이나 규약에 의해 이동영역이 통제되는 것을 의미한다. 공간특성에 의한 이동의 통제는, 도시와 농촌으로 구분하였을 때 도시지역 사람들은 농촌지 역 사람들에 비해 첨두시간대의 이동 참여율이 높으며, 이동군집수 결정에 있어서도 여러 연령층이 유사한 이동행태를 지니고 있음을 알 수 있다. 도시지역 사람들은 공간특성상에 따른 이동의 다양성이 군집수 결정에 상관되었으며, 이는 공간특성에 따라 이동행태가 달라 질 수 있다고 볼 수 있다. 성별 및 연령에 의한 통제 역시 사회적 제약조건으로서 이동행태 에 영향이 있음을 알 수 있다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.117.1-117
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• 2002

$\textbullet$ Evaluation techniques of mobility $\textbullet$ Position characteristics $\textbullet$ Path characteristics $\textbullet$ Evaluation techniques of navigation $\textbullet$ Standard measurement environment $\textbullet$ Evaluation program and equipments $\textbullet$ A measurement experiment