• 반도체디스플레이기술학회지
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• 제23권2호
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• pp.33-37
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• 2024

Recently, wearable virtual reality devices are widely used. These instruments include a 3-axis accelerometer. User's heart rate information in virtual reality contents can be useful for measuring user experience. In this paper, we propose a method to measure the heart rate through a 3-axis accelerometer based on the principle of ballistocardiography without additional sensors. The angular velocity was successively measured in a time series by the 3-axis accelerometer mounted to the head. The frequency of the maximum magnitude is determined as the heart rate through frequency transform and band pass filtering of the time series signal. For verification, the heart rate calculated from photoplethysmography sensors acquired at the same time was compared as ground-truth. In the virtual reality, the user's heart rate information can be extracted without additional heart rate sensor, and the emotional state and fatigue can be measured.

• 융합보안논문지
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• 제14권3_1호
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• pp.65-70
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• 2014

본 연구에서는 척수장애인의 신체활동 증가를 위한 피트니스 아바타 모형을 개발하고자 하였다. 해마다 장애인구의 비율은 증가하고 있으며, 이 중 지체장애인에 포함되는 척수장애인의 비율도 증가하고 있는 추세이다. 하지 마비로 인해 체육시설로의 접근이 용이하지 않은 척수장애인들의 신체활동 필요성이 더욱 절실한 상황에서 이들이 용이하게 접근할 수 있는 신체활동 방법으로 가상현실에 기반을 둔 신체활동량 증가 방법은 가장 혁신적이고 미래지향적인 방식으로 떠오르고 있다. 본 연구를 통해 다음과 같은 결과를 도출하였다. 첫째, 척수장애인의 다양한 신체활동을 활성화하고 보급하기 위하여 신체활동 전후로 용이한 방법을 통한 건강 및 체력 검사를 진단받을 수 있는 시스템 구축과 지속적인 신체활동 수행을 위한 지원체제의 확립이 필수적이며, 둘째, 지속적 신체활동을 유지하기 위해서는 동기부여가 매우 중요한 것으로 인식되고 있으므로 이를 위하여 신체활동 변화단계를 고려하고 단계별 수준에 적합한 피드백(feedback)을 제공하며 중재 효과를 검증하는 과정이 반드시 포함되어야 할 것이다.

• 융합보안논문지
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• 제15권4호
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• pp.149-154
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• 2015

본 연구는 지적장애아동들이 가상현실을 기반으로 한 기능성 게임에 참여하는 과정에서 행동 및 운동수행능력에 어떠한 변화가 보이는지 분석하는데 그 목적이 있다. 본 연구는 지적장애아동 5명을 대상으로 주 2회, 16주간 프로그램을 진행하였다. 그 결과 가상현실을 기반으로 한 기능성 게임에 참여한 지적장애아동은 주의집중, 안정된 움직임, 자신감있는 동작 등과 같은 행동의 변화를 보였으며, 운동수행능력의 경우 하위영역 - 정적 협응, 손동작 협응, 일반동작 협응, 운동속도, 동시적 자발동작, 단일 동작 수행능력- 모두에서 긍정적 변화를 나타냈다. 이와 같은 연구 결과를 바탕으로 가상현실을 기반으로 한 기능성 게임을 체계적이고 규칙적으로 적용하게 되면 지적장애인의 행동변화와 운동수행능력에 긍정적 효과를 가져올 수 있을 것이다.

• 융합보안논문지
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• 제20권2호
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• pp.91-99
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• 2020

본 연구는 정부 비상대비정책의 효율적인 추진을 위해 4차 산업혁명기 주요 정보통신기술(ICT: Information Communication Technology)의 적용 방안 제시를 목적으로 한다. 전문가들에 의한 브레인스토밍을 하여 정부의 비상대비정책을 4개 유형과 12개 세부과제로 분류하였다. 분류 결과는 상대적 중요도와 우선순위를 분석하기 위해 계층화 분석법(AHP; Analytic Hierarchy Process)을 이용하였다. AHP 설문 결과 위기관리 대응력 강화가 가장 중요한 세부과제로 분석되었다. 세부과제의 효율적 실행을 위한 주요 정보통신기술(ICT)로 인공지능(AI; Artificial Intelligence), 사물인터넷(IoT; Internet of Things), 무인자율체계(Unmanned Autonomy System), 가상현실(VR; Virtual Reality), 증강현실(AR; Augmented Reality)을 제시하였다.

• 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.

• Journal of Information Processing Systems
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• 제20권2호
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• pp.273-283
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• 2024

The digital domain has witnessed unprecedented growth, reshaping the way we interact, work, and even perceive reality. The internet has evolved into a vast ecosystem of interconnected virtual worlds, giving birth to the concept of the Metaverse. The Metaverse, often envisioned as a collective virtual shared space, is created by the convergence of virtually enhanced physical reality and interactive digital spaces. Within this Metaverse space, the concept of ownership, identity, and authenticity takes on new dimensions, necessitating innovative solutions to safeguard individual rights. The digital transformation through Metaverse has also brought forth challenges, especially in copyright protection. As the lines between the virtual and physical blur, the traditional notions of ownership and rights are being tested. The Metaverse, with its multitude of user-generated content, poses unique challenges. The primary objective of this research is multifaceted. Firstly, there's a pressing need to understand the strategies employed by non-fungible token (NFT) marketplaces within the Metaverse to strengthen security and prevent copyright violations. As these platforms become centers for digital transactions, ensuring the authenticity and security of each trade becomes paramount. Secondly, the study aims to delve deep into the foundational technologies underpinning NFTs, from the workings of blockchain to the mechanics of smart contracts, to understand how they collectively ensure copyright protection. Thus, in this paper, we propose a quantum based NFT solution that can secure Metaverse and copyright contents in an advanced manner.

• International Journal of Computer Science & Network Security
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• 제22권6호
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• pp.7-12
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• 2022

The modern stage of society's development is characterized by the rapid penetration of information technologies into all spheres of life. Their use contributes to improving the quality of tourism services, as well as the competitiveness of tourism industry enterprises. The role of information technology in tourism is growing more and more every year, which determines the relevance of the study of modern trends in the use of information technology in the tourism sector. The purpose of the study is to determine the possibilities of using information technologies to improve the quality of services provided to the tourism industry under the COVID-19 restrictions. The article systematizes the main approaches to the "cluster" category and provides an original definition of the "regional tourist cluster" concept. Based on an expert survey, the main trends in the introduction of information technologies in the tourism industry under the COVID-19 restrictions have been identified, which include virtual reality and augmented reality, speech recognition technologies, photo, video, audio (contactless control technologies), mobile IT applications and Big Data technologies. It has been concluded that the vast majority of improvements in the organization of tourism services under restrictions will be based on the organization of virtual solutions and online activities. The types of tourism services will also change, and information technology will help their development and dissemination.

• 한국CDE학회논문집
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• 제12권3호
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• pp.171-181
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• 2007

Ubiquitous computing is a vision of our future computing lifestyle in which computer systems seamlessly integrate into our everyday lives, providing services and information in anywhere and anytime fashion. Augmented reality (AR) can naturally complement ubiquitous computing by providing an intuitive and collaborative visualization and simulation interface to a three-dimensional information space embedded within physical reality. This paper presents a service framework and its applications for providing context-aware u-car maintenance services using augmented reality, which can support a rich set of ubiquitous services and collaboration. It realizes bi-augmentation between physical and virtual spaces using augmented reality. It also offers a context processing module to acquire, interpret and disseminate context information. In particular, the context processing module considers user's preferences and security profile for providing private and customer-oriented services. The prototype system has been implemented to support 3D animation, TTS (Text-to-Speech), augmented manual, annotation, and pre- and post-augmentation services in ubiquitous car service environments.

• International Journal of Computer Science & Network Security
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• 제21권3호
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• pp.219-228
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• 2021

The adoption of new technology in any organization will represent change, and such change needs user acceptance for its successful implementation. Saudi Arabian health centers are no exception; therefore, the current study will investigate the adoption of new technology, namely that of virtual reality (VR), within health centers in Saudi Arabia and specifically in Riyadh City. This study explores the current state of VR technology adoption, factors that influence such adoption, and the extent of this technology's efficiency when it is used for vaccinating children. The data were collected from two samples: workers in vaccination clinics who responded to a survey and a group of children who participated in the VR technology experiment. The current study proposed a model based on the unified theory of acceptance and use of technology 2 (UTAUT2), with the addition of two variables: personal innovativeness and satisfaction. The results indicated that the respondents' perceptions regarding the health centers' infrastructure in terms of adopting VR were moderate. Among the factors affecting VR adoption, satisfaction, personal innovativeness, and behavioral intention were identified as vastly influential factors. From the eight hypotheses, six were found to be supported, with their factors significantly influencing behavioral intention with regard to VR technology adoption. Besides, the experiment concerning the use of VR technology on children verified the technique's high efficiency in terms of providing pain management and fear removal. These findings support the continuity of VR technology use, expand its future application fields, and integrate this study into the literature on technology acceptance models for VR adoption, as limited studies have covered this topic; consequently, this will benefit future research in this field.

• 한국의상디자인학회지
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• 제7권2호
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• pp.1-10
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• 2005

This study intends to examine extensively on the current situation where the full capacity of 3D CG is not being highlighted because of the lack of the information and the awareness and to look at how the virtual reality technology is being applied ranging from the design of the clothes to the marketing. A set of processes ranging from the development of the clothing design to the marketing will be performed on the web. Designers will design with 3D CG and make the patterns and will hand this over to the producer together with the virtual swatch. But there are important problems to work out. First, it is the problem of the virtual fitting room. Second, it is the absence of the 3D CG, which is easy and convenient for the clothing design. Third, it is to perfect the visual reconstruction. Fourth, it is the security of the distribution system. Fifth, it also calls for the strengthened internet network that can smooth the flow of the tremendous data. Consumer will be able to produce according to their needs and will become designer and producer at the same time, resulting in the achievement of the consumer-oriented marketing in real sense.