• 한국게임학회 논문지
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• 제15권2호
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• pp.131-144
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• 2015

최근 스마트 기술의 발전과 함께 스마트 러닝이 대두되면서 영어교육 분야에서도 디지털콘텐츠의 활용이 점차 활성화되고 있다. 이러한 상황을 고려했을 때, 향후 영어교육에서 활용되는 디지털 콘텐츠로 게임이 부각될 것으로 예상된다. 본 연구는 영어교수학습 활동에 적절하게 활용할 수 있는 게임의 인터페이스는 어떤 것들이 있는지 살펴보고자 하였다. 이를 위해 각 게임 장르 별 대표게임을 선정하고 해당 게임의 플레이 과정을 분석하여 가장 많이 활용되는 인터페이스를 도출한 다음, 해당 인터페이스의 언어적 특성을 분석해 보았다. 그리고 인터페이스 분석 결과와 영어교수학습 방법의 특성을 종합하여 교수학습 방식에 따라 활용 가능한 게임 인터페이스를 제시해 보았다.

• 한국정보시스템학회지:정보시스템연구
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• 제26권4호
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• pp.63-85
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• 2017

Purpose Recently, much attention in building smart factory has dramatically increased with an emergence of the Industry 4.0. As we noted a connectivity gap between main concerns of MIS and the automated manufacturing systems such as POP and MES, it is recommended that CPS (Cyber-Physical System) can be an important building block for the smart factory and enrich the depth of MIS knowledge. Therefore, first, this study attempted to identify the connectivity gap between the traditional field of MIS (ERP, SCM, CRM, etc.) and the automated manufacturing systems, and then recommended CPS as a technical bridge to fill the gap. Secondly, we studied concepts and research trend of CPS that is believed to be a virtual mechanism to manage manufacturing systems in an integrated manner. Finally, we suggested research and educational opportunities in MIS based on the CPS perspectives. Design/methodology/approach Since this paper introduced relatively new idea of CPS originally discussed in the field of engineering, traditional MIS research method such as survey and experiment may not fit well. Therefore this research collected technical cases through literature survey in engineering fields, video clips from Youtube, and field references from various ICT Exhibitions and Conventions. Then we analyzed and reorganized them to highlight the necessity of CPS and draw some insight to share with MIS academia. Findings This paper introduced CPS to bridge the connectivity gap between the traditional MIS and automated manufacturing system (smart factory), a concern far away from the MIS academia. Further, this paper suggested future research subjects of MIS such as developing software to share big production data and systems to support manufacturing decisions, and innovating MIS curricula including smart and intelligent manufacturing technology within the context of traditional enterprise systems.

• 한국초등과학교육학회지:초등과학교육
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• 제33권4호
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• pp.795-805
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• 2014

In this study, we investigated elementary students' perceptions of digital science textbooks after they used the digital science textbooks based on 2009 national science curriculum. For this study, 103 $3^{rd}$ and $4^{th}$ grade students were participated. They responded to the survey items about use comfortableness and satisfaction of the digital textbook. Descriptive survey and interviews were administered to understand their perceptions of advantages and disadvantages of the digital science textbooks. The analyses of the data show that students' perceptions of the digital science textbooks were positive in general and their satisfaction appeared to be quite high. They perceived the most advantage as having chances to use multimedia like video clips, pictures, and sound. They also mentioned other advantages like viewer functions such as highlights and notes, learning support functions such as supplementary materials and videos for science experiments, and smart pad functions to operate with hands. On the other hand, they pointed out disadvantages that there were many errors and lags in operation. We also discussed the educational implications about improving digital science textbook for effective science learning.

• Asian Pacific Journal of Cancer Prevention
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• 제17권9호
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• pp.4377-4380
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• 2016

Background: To compare diagnostic performance in differentiating benign from malignant ovarian masses between IOTA (the International Ovarian Tumor Analysis) simple rules and subjective sonographic assessment. Materials and Methods: Women scheduled for elective surgery because of ovarian masses were recruited into the study and underwent ultrasound examination within 24 hours of surgery to apply the IOTA simple rules by general gynecologists and to record video clips for subjective assessment by an experienced sonographer. The diagnostic performance of the IOTA rules and subjective assessment for differentiation between benign and malignant masses was compared. The gold standard diagnosis was pathological or operative findings. Results: A total of 150 ovarian masses were covered, comprising 105 (70%) benign and 45 (30%) malignant. Of them, the IOTA simple rules could be applied in 119 (79.3%) and were inconclusive in 31 (20.7%) whereas subjective assessment could be applied in all cases (100%). The sensitivity and the specificity of the IOTA simple rules and subjective assessment were not significantly different, 82.9% vs 86.7% and 94.0% vs 94.3% respectively. The agreement of the two methods in prediction was high with a Kappa index of 0.835. Conclusions: Both techniques had a high diagnostic performance in differentiation between benign and malignant ovarian masses but the IOTA rules had a relatively high rate of inconclusive results. The IOTA rules can be used as an effective screening technique by general gynecologists but when the results are inconclusive they should consult experienced sonographers.

• 한국컴퓨터정보학회논문지
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• 제16권12호
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• pp.93-102
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• 2011

본 논문은 야외 환경에서 하나의 카메라를 이용한 시각 장애인을 위한 보행 안내 시스템을 제안한다. 기존의 스테레오 비전을 이용한 보행 지원 시스템과는 다르게 제안된 시스템은 사용자의 허리에 고정된 하나의 카메라를 이용하여 꼭 필요한 정보만을 얻는 것을 목표로 하는 시스템이다. 제안하는 시스템은 먼저 탑-뷰 영상을 생성하고, 생성된 탑-뷰 영상 내 지역적인 코너 극점을 검출한다. 검출된 극점에서 방사형의 히스토그램을 분석하여 장애물을 검출한다. 그리고 사용자 움직임은 사용자에 가까운 지역 안에서 옵티컬 플로우를 사용하여 추정한다. 이렇게 영상으로부터 추출된 정보들을 기반으로 음성 메시지 생성 모듈은 보행 지시 정보를 합성된 음성을 통해 시각 장애인에게 전달한다. 다양한실험 영상들을 사용하여 제안한 보행 안내 시스템이 일반 인도에서 유용한 안내 지시를 제공하는 것이 가능함을 보인다.

• 성인간호학회지
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• 제20권5호
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• pp.778-790
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• 2008

Purpose: This study was conducted to develop Web-based multimedia contents for supporting student nurses' clinical practice on critical care, and to evaluate learners' responses. Methods: Based on the steps of Assessment, Design, Development, Implementation, & Evaluation(ADDIE) model, a total of 13 self-directed learning modules including live lectures and real video clips were developed through faculty collaboration of nine nursing colleges in Gwangju and Chonnam province. The finally developed multimedia contents were published on the Web of the learning management system at a local e-learning center. Results: The Web contents were evaluated after self-learning by 81 junior college nursing students who were encouraged to study it at their own pace during their two-week clinical practice at a medical or surgical intensive care unit of a university hospital and two hospitals. The knowledge (t = -27.66, p < .001) and self-evaluated clinical performance level(t = 7.54, p < .001) were significantly increased after learning of the Web contents and clinical practice, and satisfaction level that measured post-test only was 4.0 out of 5 point. Conclusion: The use of Web contents for critical care need to be extended as a complimentary material in a class room lecture or clinical practice of students to increase their self-learning ability and understandings of clinical knowledge and situation.

• 대한간호학회지
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• 제50권2호
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• pp.271-285
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• 2020

Purpose: This study examined the effects of a physical activity promoting program based on the Information-Motivation-Behavioral Skills (IMB) model on physical activity and health outcomes among obese older adults with knee osteoarthritis. Methods: This study utilized a randomized controlled trial with a convenience sample of 75 obese older adults with knee osteoarthritis in a university hospital. The older adults in the intervention group participated in a 12-week program involving weekly group sessions and monitoring calls with education booklets and video clips for exercise dances, while those in the control group received an usual care. Outcomes were measured using self-report questionnaires, anthropometrics, and blood analyses. The intervention effects were analyzed using Mann-Whitney U test and ANCOVA. Results: The mean age of participants was 74.9 years with 84.0% women. The intervention group at 12 weeks showed significantly greater improvements in self-efficacy for physical activity (F=81.92, p<.001), physical activity amounts (Z=-2.21, p=.044), knee joint function (F=15.88, p<.001), and health-related quality of life (F=14.89, p<.001) compared to the control group. Among obese-metabolic outcomes, the intervention group at 12 weeks showed a significant decrease in visceral fat mass (F=7.57, p=.008) and improvement in high-density level cholesterol (F=9.51, p=.003) compared to the control group. Conclusion: Study findings support the need for an IMB based physical activity program for promoting physical activity, knee function and health outcomes in obese older adults with knee osteoarthritis. Longitudinal studies are warranted to confirm the persistence of obese-metabolic effects in clinical settings.

• 한국정보과학회논문지:소프트웨어및응용
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• 제27권7호
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• pp.712-722
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• 2000

본 논문은 팀 스포츠(team sports)의 일종인 축구경기 하이라이트 장면의 자동색인을 위해 뉴럴네트워크 기법을 이용하여 그룹 포메이션(group formation) 중의 공격패턴 자동분류 기법을 개발하고 이를 검증하였다. 본 연구에서는 축구경기의 대표 프레임 상에서 선수들과 공의 위치정보를 추출하고 그룹 포메이션 정보를 기초로 뉴럴네트워크의 BP(Back-propagation) 알고리즘을 사용하여 축구경기 하이라이트 장면의 자동추출을 위한 공격패턴 자동분류 기법을 개발 및 검증하였다. 또한, 실험에는 ‘98 프랑스 월드컵 축구경기의 다양한 공격패턴에 대한 비디오 영상에서 각각 좌측공격 60개, 우측공격 74개, 중앙공격 72, 코너킥 39, 프리킥 52개의 총 297 개의 데이타를 추출하여 사용하였다. 실험결과는 좌측공격 91.7%, 우측공격 100%, 중앙공격 87.5%. 코너킥 97.4%, 프리킥 75% 로서 매우 양호한 인식율을 보였다.

• Journal of Information Processing Systems
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• 제12권4호
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• pp.612-630
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• 2016

As mobile augmented reality technologies are spreading these days, many users want to produce augmented reality (AR) contents what they need by themselves. To keep pace with such needs, we have developed a mobile AR contents builder (hereafter referred to as MARB) that enables the user to easily connect a natural marker and a virtual object with various interaction events that are used to manipulate the virtual object in a mobile environment so that users can simply produce an AR content using natural photos and virtual objects that they select. MARB consists of five major modules-target manger, virtual object manager, AR accessory manager, AR content manager, and AR viewer. The target manager, virtual object manager and AR accessory manager register and manage natural target markers, various virtual objects and content accessories (such as various decorating images), respectively. The AR content manger defines a connection between a target and a virtual object with enabling various interactions for the desired functions such as translation/rotation/scaling of the virtual object, playing of a music, etc. AR viewer augments various virtual objects (such as 2D images, 3D models and video clips) on the pertinent target. MARB has been developed in a mobile application (app) format in order to create AR contents simply using mobile smart devices without switching to a PC environment for authoring the content. In this paper, we present the detail organizations and applications of MARB. It is expected that MARB will enable ordinary users to produce diverse mobile AR contents for various purposes with ease and contribute to expanding the mobile AR market based on spread of a variety of AR contents.

• 한국통신학회논문지
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• 제34권11B호
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• pp.1151-1168
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• 2009

멀티미디어의 프레임들은 QoS에 각각 다른 정도의 영향을 미치기 때문에, 패킷 손실을 줄이는 것이 항상 QoS를 향상시키는 것은 아니다. 사용자가 느끼는 QoS를 극대화하기 위해 본 논문은 중요성 기반 패킷 스케줄링을 제안한다. 중요성 기반 패킷 스케줄링 기법은 패킷 스케줄링의 두 가지 근본적인 문제를 해결한다. 하나는 "무엇을 보내는 가"이고 다른 하나는 "언제 보내는 가" 이다. 이용 가능한 대역폭이 계속 변화할 때, 대역폭에 적응하기 위해 모든 패킷을 보낼 수 없을 경우에는 일부의 패킷을 선택해서 보낼 수밖에 없다. 이를 위해 패킷 Significance를 제안하는데, 패킷 Significance는 효과적으로 프레임 상관관계를 파악하고 프레임의 중요도를 정량화한다. 그리디(greedy) 접근 기법이 패킷 선택 문제에 사용되었고, 패킷 Significance가 전송 스케줄링에 고려되었다. 널리 공개된 MPEG-4 비디오 클립이 실험에 사용되었으며, 시뮬레이션 소프트웨어에 디코딩 엔진이 삽입되었고, 성능 평가를 위해 PSNR을 측정하였다. 크기 기반 패킷 스케줄링 기법 및 비트 레이트 기반 최선(bit-rate based best-effort) 스케줄링 기법과 성능을 비교 분석하였다. 제안하는 기법이 더 중요한 패킷에 차별화 된 보호기능을 성공적으로 부여하며, QoS를 크게 향상시키는 것을 확인할 수 있었다.