• Journal of the Korean Society for Aviation and Aeronautics
• /
• v.26 no.2
• /
• pp.1-7
• /
• 2018

In this paper, pilot flight training procedure of VFR (Visual Flight Rule) flight procedure was investigated through basic aviation training device (BATD) using VR HMD (Virtual Reality Head Mount Display). In order to evaluate the efficiency of the pilot training, the experimental pilot group was divided according to the similar piloting ability, then same VFR flight procedure was carried out using both the VR BATD and the conventionl BATD. The comparison of the X, Y and Z position of the aircraft from the extracted flight data was conducted. As a result, it was confirmed that the VR BATD shows better steering training efficiency tendency than the conventional BATD.

• Electronics and Telecommunications Trends
• /
• v.31 no.1
• /
• pp.146-156
• /
• 2016

게임은 IT 기술의 발전에 따라 그 형태, 종류, 방식이 다양해져 왔다. 즉, 새로운 IT 기술에 대한 이해는 차세대 게임 동향 예측을 가능하게 한다. 최근, 소프트웨어 및 하드웨어 기술의 진보로 가상현실(Virtual Reality: VR) 및 증강현실(Augmented Reality: AR) 기술이 적용된 다양한 애플리케이션들이 등장하고 있다. 큰 규모의 시장을 형성하고 있는 게임 업계에서도 그 VR/AR 기술을 게임 개발에 이용하고자 하며, 일부 업체들을 중심으로 몇 가지 상용 게임이 이미 출시되었다. 본고에서는 차세대 게임을 위한 VR/AR 기술 및 게임 서비스 현황을 살펴보고, 향후 VR/AR 게임의 발전 방향에 대해 전망한다.

• Science of Emotion and Sensibility
• /
• v.23 no.3
• /
• pp.79-90
• /
• 2020

The inconsistency in different sensory information causes virtual reality (VR) sickness. This research verifies whether the consistent sensory information reduces VR sickness within treadmill-based virtual reality. Furthermore, we examined the inconsistency between the visually perceived walking speed by optical flow in VR and the physically perceived walking speed in treadmill walking on VR sickness. In Experiment 1, participants reported VR sickness levels while experiencing an increase in the virtual reality. We compared the VR sickness level reported on the standing still condition with that on the treadmill-walking condition. Based on our results, less VR sickness and more sense of presence and immersion were reported on the treadmill-walking condition than on the standing still condition. In Experiment 2 and Experiment 3, the effect of inconsistency between perceived visual speed and perceived walking speed on VR sickness was examined. Interestingly, participants reported less sickness when the perceived visual speed was faster than the perceived walking speed, compared to when the sense of speed was consistent. These results imply that allowing participants to walk on a treadmill while experiencing virtual reality reduces VR sickness. Hence, the perceived visual-walking speed consistency is not necessarily required to reduce VR sickness.

• Science of Emotion and Sensibility
• /
• v.25 no.1
• /
• pp.103-114
• /
• 2022

Global virtual reality (VR) and augmented reality (AR) markets are growing as VR and AR become a new source of revenue for industries around the world. In the edutech sector, an industry that combines traditional education, research on new innovative educational models and business models are scarce, and improvements are needed in the technology group and business environment to realize edutech in detail. Therefore, this study aims to define the elements strategically required for VR Toon development by comparing and analyzing the characteristics of existing touch panel-based display Toon and VR Toon content experiences. Tablet PC Toon and VR Toon were selected to conduct the research. Thirty people (19 men and 11 women) from their teens through their forties were surveyed using questionnaires. The questionnaires were formulated through a quantitative method by using AttrakDiff with a 7-point scale (-3: negative words to 3: positive words). Qualitative evaluations were also performed addressing nine concepts (satisfaction, novelty, operability, creativity, understanding, education, interest, participation, expressiveness). As a result, the usability test results of educational content using tablet personal computers and VR equipment were analyzed from the viewpoint of user experience to define elements expected to be strategically required for VR Toon development.

• 전기의세계
• /
• v.29 no.1
• /
• pp.58-64
• /
• 1980

In this paper, this objective is to obtain the mathematical model which describes the dynamic characteristics of variable reluctance(VR) step motor, the most important and most widely used motor in practice. In the development of the mathematical model for VR step motor, first the general nonlinear dynamic equations which describe the N-phase VR step motor are derived. These general equations are then applied to the multiple-step type of VR step motor in case, for simplicity, maynetic saturation and core lossess in the iron are neglected. These nonlinear dynamic equations are numerically analysed by the computer simulation, through which the performance characteristics of a step motor undertest are investigated under the various operating conditions.

• Textile Coloration and Finishing
• /
• v.11 no.6
• /
• pp.18-23
• /
• 1999

PET POY(pre-oriented-yam) were treated by false twister to high bulky. False twister have many processing parameters velocity ratio(VR), belt cross angle$(\theta)$, 1st heater temp. and K(twisting tension/untwisting tension). we analyzed the effect of properties of textured polyester yam on processing condition. Initial modulus, thermal stress, No. of snarl is decreased by 1st heater. In VR=1.97, Dry and wet shrinkage is increased but is decreased by 1st heater in VR=1.564. K/S and cristallinity tend to increase by decreasing VR.

• Trans-
• /
• v.15
• /
• pp.25-56
• /
• 2023

VR is a dynamic image simulation technology with very high information density. Among them, spatial depth, temporality, and realism bring an unprecedented sense of immersion to the experience. However, due to its high information density, the information contained in it is very easy to be manipulated, creating an illusion of objectivity. Users need guidance to help them interpret the high density of dynamic image information. Just like setting up navigation interfaces and interactivity in games, interactivity in virtual reality is a way to interpret virtual content. At present, domestic research on VR content is mainly focused on technology exploration and visual aesthetic experience. However, there is still a lack of research on interactive storytelling design, which is an important part of VR content creation. In order to explore a better interactive storytelling model in virtual reality content, this paper analyzes the interactive storytelling features of the VR animated version of <Wolves in the walls> through the methods of literature review and case study. We find that the following rules can be followed when creating VR content: 1. the VR environment should fully utilize the advantages of free movement for users, and users should not be viewed as mere observers. The user's sense of presence should be fully considered when designing interaction modules. Break down the "fourth wall" to encourage audience interaction in the virtual reality environment, and make the hot media of VR "cool". 2.Provide developer-driven narrative in the early stages of the work so that users are not confused about the ambiguous world situation when they first enter a virtual environment with a high degree of freedom. 1.Unlike some games that guide users through text, you can guide them through a more natural interactive approach that adds natural dialog between the user and story characters (NPC). Also, since gaze guidance is an important part of story progression, you should set up spatial scene user gaze guidance elements within it. For example, you can provide eye-following cues, motion cues, language cues, and more. By analyzing the interactive storytelling features and innovations of the VR animation <Wolves in the walls>, I hope to summarize the main elements of interactive storytelling from its content. Based on this, I hope to explore how to better showcase interactive storytelling in virtual reality content and provide thoughts on future VR content creation.

• Journal of Science Education
• /
• v.46 no.1
• /
• pp.66-79
• /
• 2022

This study attempts to find out how science classes using VR content affect students' scientific attitudes and spatial senses. For 4th and 5th graders of an elementary school, a comparative class and an experimental class were set up for each grade, and a total of 11 classes were conducted for each grade. Before and after class treatment, pre- and post-tests were conducted on scientific attitudes and spatial sensations, and interviews with students were conducted during class. After all the classes for the research unit were completed, a survey was conducted to find out the changes in students' perceptions. As results of this study show, it was found that science classes applying virtual reality (VR) content have positive effects on students' scientific attitudes and spatial ability.

• Biomedical Science Letters
• /
• v.30 no.1
• /
• pp.1-9
• /
• 2024

Although there have been several attempts to use virtual reality (VR) in the treatment of depression, the results have been inconsistent and existing studies have mostly relied on subjective measures to assess the effectiveness of VR in improving depression. The aim of this study was to investigate the effect of nature experience-based VR intervention on depressive symptoms in a young population using both subjective and objective measurements. The study population included 15 participants who had more than 14 identifiers of the Korean Beck Depression Inventory (K-BDI)-II. Participants received three weeks (four times per week) of VR intervention. The effectiveness of VR was assessed through changes in K-BDI-II scores and depression-related blood biomarkers. Nature experience-based VR intervention led to an approximately 50% reduction of K-BDI-II score (before 25.7±7.7 vs. after 12.5±8.3 (P<0.001)). Of these, loss of pleasure and fatigue showed the largest amount of improvement. However, levels of cortisol, brain-derived neurotrophic factor, and interleukin-6 did not differ from those at baseline. The findings of our pilot study suggest that nature experience-based VR can be a useful adjunctive treatment method for improving depressive symptoms in individuals who have difficulty accessing the real outside natural environment.

• The Journal of Korean Academy of Sensory Integration
• /
• v.21 no.1
• /
• pp.34-46
• /
• 2023

Objective : The purpose of this study was to systematically analyze the methods by which virtual reality (VR)-based occupational therapy interventions are applied to disabled children and adolescents and to assess their effectiveness. Methods : The RISS, DBpia, KCI, Science Direct, and CINAHL MEDLINE databases were searched for relevant literature from January 2012 to August 2022. The main search terms used were "virtual reality," "work therapy," "youth," "virtual reality," "occupational therapy," "child," and "adolescent." A total of 16 documents were selected for analysis by the 4th stage of the PRISMA flowchart. Results : In the 16 selected studies, VR-based occupational therapy when used with children and adolescents with disabilities and was shown to have meaningful effects. Among the types of cerebral palsy covered in the studies, the most common was hemiplegia, and the evaluation tools used for measurement of the VR effect were daily activities, cognition, exercise technology, social-interaction technology, and visual-perception evaluation. Nintendo wii and Microsoft Kinect produced the VR tools most commonly used to improve motor skills and daily life. Conclusion : The results of this study indicate that VR interventions can be used effectively in clinical practice. In the future, they may assist in the diagnosis of disabled children and adolescents, in helping to select VR tools that are suitable for the purposes of intervention, and in the presentation of specific methods.