• Annual Conference of KIPS
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• 2023.05a
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• pp.722-723
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• 2023

가속화되는 인구 감소와 COVID-19로 인하여 지방 도시 쇠퇴 현상이 심화되고 있다. 한편, 지역 활성화의 핵심 전략이자 수단이 되는 관광 산업은 트렌드에 맞는 새로운 컨텐츠가 부족하여 어려움을 겪고 있다[1]. 본 논문에서는 이러한 문제를 해결해보고자 가상현실(VR)과 증강현실(AR) 기술을 적용한 새로운 관광 컨텐츠를 제안한다. 실제 도시를 3D 모델링 한 배경과 3D 페인팅 기능을 통해 작품 만들기 서비스를 구현하였고, GPS 기능과 AR 카메라를 통해 작품 관람하기 서비스를 구현하였다. 이 프로그램은 메타버스 기술을 적용한 관광 컨텐츠의 사례로써 향후 지방 도시 활성화에 기여할 것으로 기대한다.

• The Bulletin of The Korean Astronomical Society
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• v.46 no.1
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• pp.40.2-40.2
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• 2021

최근 COVID-19의 확산에 따라 비대면 학습의 중요성이 화두로 오르고 있다. 과학관과 같은 다중이용시설을 이용하는 방법에서 각 학교, 또는 가정에서 지도할 수 있는 교육 방법의 변화 또한 논의해야 할 때이다. 특히 천문학 교육의 장으로 활용되고 있는 천체투영관(Planetarium)은 다중이용시설로, 상황에 따라 여러 가지 제약을 가지므로 시·공간 제약을 받지 않는 교육프로그램의 개발이 필요하고 볼 수 있다. 본 연구에서는 천체시뮬레이션 소프트웨어를 활용한 스크립트 제작 및 360° VR 영상 제작기술을 개발하고 온라인 플랫폼을 활용하여 천체투영관을 방문하지 않은 비대면 환경에서 도 참가자개인의 휴대기기등을 통한 몰입도 높은 천문학 교육을 구현할 수 있는 프로그램을 개발하여 새로운 환경에 대한 적용 기회를 제공하고자 한다. 나아가 개발한 프로그램을 천체투영관에 적용하여 천체투영관 활용 천문학 교육프로그램과 교육과정과 연계한 교육콘텐츠 개발에 활용되기를 기대한다.

• Asia Marketing Journal
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• v.26 no.1
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• pp.45-59
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• 2024

Extended Reality (XR) technology, the umbrella term covering hyper-realistic technologies, is known to enhance consumer experience and is therefore developing rapidly and being utilized across various industries. Growing studies have examined XR technology and consumer experience; however, the literature has failed to fully explore hyper-realistic technology through a holistic perspective. To fill this gap, we analyzed 720 Korean and international articles through semantic network analysis and topic modeling and identified the literature on XR research in consumer experience. As a result, we extracted six main topics: "Tourism," "Buying Behavior," "XR Technology Acceptance," "Virtual Space," "Game," and "XR Environment." The results provide comprehensive insight on XR technology in consumer experience, whereas the literature is bounded on the production side as revealing a lack of academic discourse on consumer rights and responsibilities. Research reflecting the consumer welfare perspective is, therefore, recommended for future studies.

• Journal of Sericultural and Entomological Science
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• v.34 no.1
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• pp.21-29
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• 1992

In the experiment, gene actions were analyzed for seven silkworm varieties in order to obtain basic information on their genetic improvement by diallel crosses. The results obtained were summarized as follows : in analysis of variance, significantly maternal and reciprocal effects were observed for all character except female cocoon shell percentage and female pupal weight. Over-dominance was shown by Vr-Wr graphic analysis in three characters such as female cocoon weight, female and male pupal weight, and partial dominance in five characters such as male cocoon weight, cocoon shell percentage in both female and male. Component of genetic varience analyzed for five characters such as male cocoon weight, cocoon shell weight, cocoon shell percentage in both female and male showed that additive effects were higher than dominant effects, and female cocoon weight showed dominant effects higher than additive effects. Heritability of narrow sence was higher more than 0.51 and heritability of broad sence was higher more than 0.77 in all characters except for female pupal weight. The directions of dominance were negative for female cocoon shell weight and somewhat higher for female and male cocoon shell percentage. Meanwhile cocoon weight, pupal weight in both female and male showed positive in the direction of dominance.

• Journal of Veterinary Clinics
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• v.31 no.5
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• pp.361-366
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• 2014

The aim of this study was to determine if vaccines containing CPV-2 or CPV-2b provided protection against challenge with a recent Korean CPV-2a isolate. Twenty mongrel pups aged 9 weeks old were used. The commercial CPV-2 or CPV-2b vaccines were administered to each of the 8 pups thrice every 3 weeks, respectively. Two weeks after the last vaccination, all pups were challenged with CPV-2a (VR00174 strain) $1{\times}10^6\;TCID_{50}$. Clinical signs, fecal excretion of challenged CPV, and serological response of pups were observed for 2 weeks after challenge. All vaccinated pups did not display any clinical signs of disease after challenge with Korean CPV-2a isolate, whereas all non-vaccinated pups exhibited mucoid or hemorrhagic diarrhea, vomiting and anorexia. In all non-vaccinated pups, the virus could be detected in feces from 4 days after challenge, whereas in vaccinated pups, no evidence of viral excretion could be detected. Two of 4 non-vaccinated pups died 6 days after the challenge. This study showed that the two commercial CPV-2 and CPV-2b vaccines were effective in preventing infection and/or disease caused by the Korean CPV-2a isolate.

• The Bulletin of The Korean Astronomical Society
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• v.36 no.2
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• pp.145.1-145.1
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• 2011

We present results of two-color VR photometry of the intermediate polar RXS J1803. The data were aquired using the Korean 1-m telescope located at Mt. Lemmon, USA. Different "high" and "low" luminosity states, similar to other intermediate polars, were discovered. No statistically significant variability of the color index with varying luminosity was detected. The orbital variability was found to be not statistically significant. Spin maxima timings were determined, as well as the photometric ephemeris for the time interval of our observations. The spin period variations, caused by interaction of the accretion structure with the rotating magnetic white dwarf, were also detected. These variations are of complicated character, and their study requires further observations. We determine the color transformation coefficients for our photometric systems, and improve on the secondary photometric standards.

• Journal of The Korean Astronomical Society
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• v.44 no.3
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• pp.89-96
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• 2011

We present results of two-color VR photometry of the intermediate polar RXS J1803. The data were aquired using the Korean 1-m telescope located at Mt. Lemmon, USA. Different "high" and "low" luminosity states, similar to other intermediate polars, were discovered. No statistically significant variability of the color index with varying luminosity was detected. The orbital variability was found to be not statistically significant. Spin maxima timings were determined, as well as the photometric ephemeris for the time interval of our observations. The spin period variations, caused by interaction of the accretion structure with the rotating magnetic white dwarf, were also detected. These variations are of complicated character, and their study requires further observations. We determine the color transformation coefficients for our photometric systems, and improve on the secondary photometric standards.

• Current Optics and Photonics
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• v.1 no.6
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• pp.642-648
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• 2017

Involuntary hand tremor has been a serious challenge in micromanipulation tasks and thus draws a significant amount of attention from related fields. To minimize the effect of the hand tremor, a variety of mechanically assistive solutions have been proposed. However, approaches increasing human awareness of their own hand tremor have not been extensively studied. In this paper, a head mount display based virtual reality (VR) system to increase human self-awareness of hand tremor is proposed. It shows a user a virtual image of a handheld device with emphasized hand tremor information. Provided with this emphasized tremor information, we hypothesize that subjects will control their hand tremor more effectively. Two methods of emphasizing hand tremor information are demonstrated: (1) direct amplification of tremor and (2) magnification of virtual object, in comparison to the controlled condition without emphasized tremor information. A human-subject study with twelve trials was conducted, with four healthy participants who performed a task of holding a handheld gripper device in a specific direction. The results showed that the proposed methods achieved a reduced level of hand tremor compared with the control condition.

• Journal of the Korea Society of Computer and Information
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• v.24 no.1
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• pp.67-71
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• 2019

With continued technology innovation in the fields of computer graphics (CG) and virtual reality (VR), digital animated avatars (or virtual humans) are evolving into ones that are more interactive at a suitable location such as museum, airport, and shopping mall. Specially, the form of the avatar (or the virtual human) realistically need to be expressed in a way that matches the users' physical space. In recent many researches, the form of virtual human has been expressed as mixed-reality human (MRH)-the virtual human combines with the physicality as the real part. In this paper, we propose to carry out a study comparing various MRH on co-presence and emotional response in two-typed virtual humans depending on how many actual parts are included: (1) (Level 1) small parts in the virtual human combined virtual components (e.g., the head only) and (2) (Level 2) large parts in the virtual human with the physicality as the real part such as head, arms, and upper body). We report on the implemented results of our virtual humans and experimental results on co-presence and emotional response.

• The Journal of Korea Robotics Society
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• v.17 no.1
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• pp.8-15
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• 2022

In this paper, we proposed the method of virtual reality-based surgical navigation to reproduce the pre-planned position and angle of the pedicle screw in spinal fusion surgery. The goal of the proposed method is to quantitatively save the surgical plan by applying a virtual guide coordinate system and reproduce it in the surgical process through virtual reality. In the surgical planning step, the insertion position and angle of the pedicle screw are planned and stored based on the virtual guide coordinate system. To implement the virtual reality-based surgical navigation, a vision tracking system is applied to set the patient coordinate system and paired point-based patient-to-image registration is performed. In the surgical navigation step, the surgical plan is reproduced by quantitatively visualizing the pre-planned insertion position and angle of the pedicle screw using a virtual guide coordinate system. We conducted phantom experiment to verify the error between the surgical plan and the surgical navigation, the experimental result showed that target registration error was average 1.47 ± 0.64 mm when using the proposed method. We believe that our method can be used to accurately reproduce a pre-established surgical plan in spinal fusion surgery.