• International Journal of Computer Science & Network Security
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• 제22권11호
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• pp.241-247
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• 2022

Ad hoc network is self-organized network powered by battery. The reliability of virtual user identification and channel security are reduced when SNR is low due to limited user energy. In order to solve this problem, a joint virtual user identification and channel security en/decoding method is proposed in this paper. Transmitter-receiver-based virtual user identification code is generated by executing XOR operation between orthogonal address code of transmitter and pseudo random address code of receiver and encrypted by channel security code to acquire orthogonal random security sequence so as to improve channel security. In order to spread spectrum as well as improve transmission efficiency, data packet is divided into 6-bit symbols, each symbol is mapped with an orthogonal random security sequence. Subspace-based method is adopted by receiver to process received signal firstly, and then a judgment model is established to identify virtual users according to the previous processing results. Simulation results indicate that the proposed method obtains 1.6dB E_b/N₀ gains compared with reference methods when miss alarm rate reaches 10^-3.

• 유통과학연구
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• 제19권11호
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• pp.81-90
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• 2021

Purpose: The purpose of this research is that Metaverse platforms' UXBDI can be distinguished among Metaverse platform channel types. Metaverse platform represents a collective term signifying services that include augmented reality, lifelogging, mirror worlds, and virtual worlds. User Experience-Based Design Innovativeness (UXBDI) is characterized by novelty in product design and services that satisfy user experience. This study examined the effect of Metaverse platforms' UXBDI on user-Metaverse platform relationships. Research design, data and methodology: Metaverse platform users were selected as samples, and a marketing research institution known as a panel company conducted the survey. It used multiple regression to test the impact on platform identification and commitment based on a survey of 442 South Korean respondents. Results: The research confirmed that UXBDI sub-dimensional scales of attractiveness and interaction increased user-Metaverse platform identification and commitment. Also, a Metaverse platform identity increased user-Metaverse platform identification in virtual and mirror worlds. Conclusion: This study contributes to multiple academic fields. First, the UXBDI of Metaverse platforms appears to be a key component of ongoing user-Metaverse relationships. Second, UXBDI affects relationships differently based on the Metaverse platform type.

• 패션비즈니스
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• 제28권2호
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• pp.1-14
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• 2024

Within the metaverse platform, users engage in communication with others through 'avatars' reflecting their own identities. Users experience various virtual fashion items through avatars, and the fashion industry anticipates avatars wearing virtual fashion items as an emerging business opportunity. Many fashion brands are currently releasing virtual fashion items specifically designed for avatars. In this study, we examined the impact of user identification with their avatar on their perception of the attributes of virtual fashion items (investment attractiveness, scarcity, playfulness, and aesthetics) and its influence on behavioral intentions. The research involved a survey of 250 females with prior knowledge of the metaverse. Structural equation modeling analysis was conducted to examine research hypotheses and validate the model. The results confirmed that as users within the metaverse perceive greater identification with their avatar, they also perceive the attributes of virtual fashion items more favorably. This finding affirms the self-reference effect, where users positively evaluate objects associated with themselves. Additionally, perceiving the attributes of virtual fashion items was found to be positively linked to purchase intentions for virtual products and actual interest in the brand. Lastly, a higher intention to purchase virtual fashion items was associated with forming a more favorable attitude toward the respective brand. Consequently, this study provides academic and practical implications for marketing strategies within the metaverse, emphasizing the active utilization of avatars and elements that facilitate user-avatar identification for effective engagement.

• 한국정보통신학회논문지
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• 제23권5호
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• pp.622-629
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• 2019

가상현실 속에서 실제와 같은 서비스를 제공하는 기술 VR(Virtual Reality)은 Head Mounted Display(HMD) 기기를 이용하여 실제와 유사한 체험을 제공한다. 최근 VR의 시장은 커졌으나 가상현실에서의 보안에 대한 연구는 다른 분야에 비해 미흡하다. 현재 VR을 활용한 많은 개인화된 서비스들이 진행되고 있는 만큼 안전한 사용자 인증이 중요하다. VR의 HMD 기기를 착용을 하면 주변 환경을 인식하지 못하기에 Personal Identification Number(PIN)입력 시에 Shoulder Surfing Attack (SSA)으로 사용자의 입력 패턴을 분석이 용이하다. 본 논문에서는 사용자의 편의성은 그대로 유지하면서 해커가 입력 패턴을 분석하더라도 사용자의 비밀 번호를 안전하게 보호할 수 있는 방법에 대해 제안한다. VR 특성에 맞게 기존 직사각형 모양에서 벗어난 새로운 형태의 가상 키패드와 사용자와 직관적인 상호작용을 위해 자물쇠 오브젝트를 최초로 구현 하였다. 또한 VR의 기존 입력 장치들과 동일한 센서를 사용하는 스마트 글러브와 이에 적합한 회전방식의 PIN입력 방식을 구현하였다. 따라서 총 세 가지의 VR 상에서의 안전한 PIN 입력 방법에 대하여 제안하며 실험을 통해 SSA에 대한 안전성을 검증하였다.

• 유통과학연구
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• 제21권10호
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• pp.109-121
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• 2023

Purpose: This study aims to verify whether avatars that embody different brand concepts offer different experiences to users. Furthermore, this study explores the relationship between user identification with avatars and their actual brand purchase intentions. Research design, data and methodology: The research design employed a between-subjects approach, with two independent variables: brand concept and avatar. The measured dependent variables were brand experience in extended reality (XR) and purchase intention. Additionally, brand attitude served as a control variable. Results: First, in virtual brand spaces with symbolic benefits, ideal avatars were found to elicit higher levels of brand experience than actual avatars. Specifically, participants reported elevated levels of entertainment and relational assembly experiences in symbolic brand spaces. Second, this research reveals that the relationship between users' identification with avatars and their intention to make actual brand purchases is mediated by brand experience in XR. Conclusions: The findings suggest that ideal avatars evoke higher levels of brand experience within symbolic brand spaces, particularly in entertainment, relational connection, and a sense of community. Furthermore, this study establishes the role of brand experience in XR as a mediator between avatar identification and purchase intentions.

• 정보처리학회논문지B
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• 제15B권3호
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• pp.211-218
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• 2008

이 논문에서 우리는 교육용 가상환경에서 사용자가 직접 촬영한 사진들을 학습 내용과 사용자의 상황 정보를 바탕으로 자동으로 사진을 정리 요약해서 가상 환경 체험이 끝난 후 짧게 보여주는 새로운 사진 정리 알고리즘을 제안한다. 이 알고리즘은 기존의 날짜, 장소, 키워드를 이용하여 많은 양의 사진을 정리 요약해주는 사진 정리 알고리즘과는 달리 사용자의 관심도와 기억해야 할 주요 학습내용을 다시 한 번 살펴보도록 함으로써 기억 향상을 도와주는 것을 목적으로 한다. 본 논문에서는 먼저 학습 효과를 높이기 위해 교육적으로 의미가 있는 사진을 추출하는 기준과 인지율 계산을 설명하고, 이 알고리즘을 가상환경과 사진 뷰어 인터페이스와 연동한 전체적인 시스템을 설명한다. 또한 이 알고리즘에 사용된 인지율 모델링을 위한 사용자 실험 분석과 향후 연구 방향에 대해 논한다.

• 한국게임학회 논문지
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• 제18권4호
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• pp.33-42
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• 2018

가상현실은 컴퓨터 시스템을 통해 사용자에게 가상의 세계를 경험 할 수 있도록 사용자의 인지시각 및 감성을 자극하는 것이다. 가상현실의 몰입을 위해 HMD를 비롯한 다양한 디바이스를 이용한 사용자의 행동 및 감각정보 획득과 자극이 필요하다. 가상현실에서 동작하는 물체가 실제 오브젝트와 연동하여 동작한다면 가상현실에 대한 몰입감은 증가될 것이다. 본 논문은 가상현실에서 스마트 로봇을 이용하여 현실의 전장과 동기화시킨 실제 환경을 조성하고 이를 기반으로 한 로봇 컨트롤 시뮬레이션 게임을 제작하였다. 로봇의 위치확인 및 보정을 위해 광학식별장치(OID: Optical Identification Device)를 이용한 광학 코드를 사용한다. OID기반의 매트 위의 이동에 대한 감지는 템플릿 기반의 광학 코드 인식기법과 칼만 필터를 이용한 위치 측정보정을 통하여 이루어진다. 게임을 개발을 통해 가상현실상의 사용자 컨트롤을 기반으로 현실의 오프젝트의 동작 제어에 관한 유효성을 확인한다.

• Journal of Information Technology Applications and Management
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• 제31권1호
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• pp.113-122
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• 2024

This comprehensive study delves into the analysis of user review data across various metaverse platforms, employing advanced text mining techniques such as TF-IDF and Word2Vec to gain insights into user perceptions. The primary objective is to uncover the factors that contribute to user satisfaction and dissatisfaction, thereby providing a nuanced understanding of user experiences in the metaverse. Through TF-IDF analysis, the research identifies key words and phrases frequently mentioned in user reviews, highlighting aspects that resonate positively with users, such as the ability to engage in creative activities and social interactions within these virtual environments. Word2Vec analysis further enriches this understanding by revealing the contextual relationships between words, offering a deeper insight into user sentiments and the specific features that enhance their engagement with the platforms. A significant finding of this study is the identification of common grievances among users, particularly related to the processes of refunds and login, which point to broader issues within payment systems and user interface designs across platforms. These insights are critical for developers and operators of metaverse platforms, suggesting a focused approach towards enhancing user experiences by amplifying positive aspects. The research underscores the importance of continuous improvement in user interface design and the transparency of payment systems to foster a loyal user base. By providing a comprehensive analysis of user reviews, this study offers valuable guidance for the strategic development and optimization of metaverse platforms, ensuring they remain responsive to user needs and continue to evolve as vibrant, engaging virtual environments.

• 한국지능시스템학회:학술대회논문집
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• 한국퍼지및지능시스템학회 2007년도 춘계학술대회 학술발표 논문집 제17권 제1호
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• pp.397-400
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• 2007

In this paper, we discuss the user-customized interaction for intelligent home environments. The interactive system is based upon the integrated techniques using both speech and face recognition. For essential modules, the speech recognition and synthesis were basically used for a virtual interaction between user and proposed system. In experiments, particularly, the real-time speech recognizer based on the HM-Net(Hidden Markov Network) was incorporated into the integrated system. Besides, the face identification was adopted to customize home environments for a specific user. In evaluation, the results showed that the proposed system was easy to use for intelligent home environments, even though the performance of the speech recognizer did not show a satisfactory results owing to the noisy environments.

• International Journal of Computer Science & Network Security
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• 제23권1호
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• pp.71-77
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• 2023

In the current Internet system, there are many problems using anonymity of the network communication such as personal information leaks and crimes using the Internet system. This is why TCP/IP protocol used in Internet system does not have the user identification information on the communication data, and it is difficult to supervise the user performing the above acts immediately. As a study for solving the above problem, there is the study of Policy Based Network Management (PBNM). This is the scheme for managing a whole Local Area Network (LAN) through communication control for every user. In this PBNM, two types of schemes exist. As one scheme, we have studied theoretically about the Destination Addressing Control System (DACS) Scheme with affinity with existing internet. By applying this DACS Scheme to Internet system management, we will realize the policy-based Internet system management. In this paper, to realize it, concept of the Internet PBNM Scheme is proposed as the final step.