• Journal of the Institute of Electronics Engineers of Korea SC
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• v.44 no.4 s.316
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• pp.48-54
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• 2007

Hand shape is one of important elements in Korean Sign Language (KSL), which is a communication method for the deaf. To express sign motion in a virtual reality environment based on OpenGL, we need an editor which can insert and modify sign motion data. However, it is very difficult that people, who lack knowledge of sign 1anguage, exactly edit and express hand shape using the existing editors. We also need a program to efficiently construct and store the hand shape data because the number of data is very large in a sign word dictionary. In this paper we developed a KSL hand shape editor to easily construct and edit hand shape by a graphical user interface (GUI), and to store it in a database. Hand shape codes are used in a sign word editor to synthesize sign motion and decreases total amount of KSL data.

• KIPS Transactions on Computer and Communication Systems
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• v.11 no.1
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• pp.9-22
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• 2022

Virtual Reality(VR) technology is an interface technology that is actively used in various audio-visual-based applications by showing users a virtual world composed of computer graphics. Since VR-based applications are graphic processing-based applications, expensive computing devices equipped with Graphics Processing Unit(GPU) are essential for graphic processing. This incurs a cost burden on VR application users for maintaining and managing computing devices, and as one of the solutions to this, a method of operating services in cloud environments is being used. This paper proposes a performance management technique to address the problem of performance interference between containers owing to GPU resource competition in container-based high-performance cloud environments in which multiple containers share a single GPU. The proposed technique reduces performance deviation due to performance interference, helping provide uniform performance-based remote VR services for users. In addition, this paper verifies the efficiency of the proposed technique through experiments.

• Journal of the Korea Society of Computer and Information
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• v.8 no.4
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• pp.28-34
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• 2003

ASN.1 is the most fundamental technology in network management. The develoment of ASN.1 environment requires three steps : compiler work to parse ASN.1 languages, updating database with the parsing results, and pretty-printing work for data in the database. This paper presents the design and implementation of the translator which automatically translates the specification of ASN.1 to the object-oriented language C++. This system provides a total environment including for various graphic user interface, DB interface, browser to develop ASN.1 for development environment of ASN.1 For the implementation, Objectivity DB is used for database, flex and yacc for compiling, and Tcl/Tk for user interface.

• Journal of Advanced Navigation Technology
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• v.12 no.5
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• pp.401-411
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• 2008

GeoWeb services deliver various thematic information related to geographic positions over the internet GeoWeb services needs to provide efficient accessibilities to geographic contents by interaction with users through the map graphic elements. SVG, which is an application of XML, gives rich DOM I/F for interaction with graphic objects. In this study map servers and client viewers are implemented to serve SVG map available on the fixed mobile internet computing environments. Map servers are made compliant with OGC WMS and WFS specifications and SVG map viewers are developed for both Windows PC and WinCE PDA.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• fall
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• pp.62-64
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• 2021

최근 코로나 19의 확산으로 인하여 코로나 감염으로 인한 외부 방송 촬영에 제약이 생기면서, 제작환경은 실외에서 실내의 가상 환경 제작 수요가 크게 증가하고 있다. 이에 확장현실 제작 기술이 방송 제작에 적극 활용되고 있다. 확장현실은 외부의 제작 환경을 몰입형 LED월 시스템 기반으로 가상의 그래픽으로 내부 스튜디오 제작환경에서 제작 할 수 있어 방송에서는 확장현실 관련 시스템 및 그래픽 콘텐츠, 운영기술 개발이 요구되고 있다. 이에 본 논문은 확장현실 콘텐츠를 제작 할 수 있는 '몰입형 혼합현실 시스템'을 제안한다. 특히, 확장현실 환경에서 원격으로 AR과 VR 콘텐츠의 동기를 맞추어 운영할 수 있도록 개발된 '원격제어 타임라인 디렉터'를 통해 AR/VR 콘텐츠를 재생 및 입출력을 제어할 수 있다. 본 시스템을 통하여 그래픽 기반의 AR/VR 시험 그래픽 콘텐츠 및 실사 기반의 360 콘텐츠 기반 확장현실 시험 콘텐츠를 개발하였으며, 상용카메라 추적시스템과 연개하어 자연스러운 추적 및 합성 그리고 타임라인 디렉터의 사용자 인터페이스를 이용하여 확장현실 콘텐츠를 제작 및 운영 할 수 있음을 확인하였다.

• Journal of the Korea Convergence Society
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• v.13 no.2
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• pp.143-150
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• 2022

Audio-based SNS also needs a visual guide to reach the contents desired by the users. Therefore, this study investigates visual interface design elements that influence the experience of using audio contents in audio-based SNS. Prior researches have identified that the generally acknowledged interface design elements are important for the usability of audio contents. Through the analysis of the currently launched audio-based SNS, the influence of general interface elements were again confirmed, and via the analysis of other audio content services, a new interface evaluation element was explored. Accordingly, with five general interface evaluation elements-layout, color, icon, typography, graphic image, multimedia elements are newly defined and proposed as crucial factors in evaluating the UI of audio-based SNS.

• Korean Journal of Cognitive Science
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• v.19 no.4
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• pp.331-367
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• 2008

This study aims to validate a web-based neuropsychological testing tool developed by Kwak(2007) and to suggest solutions to potential problems that can deteriorate its validity. When it targets a wider range of subjects, a web-based neuropsychological testing tool is challenged by high drop-out rates, lack of motivation, lack of interactivity with the experimenter, fear of computer, etc. As a possible solution to these threats, this study aims to redesign the user interface of a web-based attention testing tool through three phases of study. In Study 1, an extensive analysis of Kwak's(2007) attention testing tool was conducted to identify potential usability problems. The Heuristic Walkthrough(HW) method was used by three usability experts to review various design features. As a result, many problems were found throughout the tool. The findings concluded that the design of instructions, user information survey forms, task screen, results screen, etc. did not conform to the needs of users and their tasks. In Study 2, 11 guidelines for the design of web-based attention testing tools were established based on the findings from Study 1. The guidelines were used to optimize the design and organization of the tool so that it fits to the user and task needs. The resulting new design alternative was then implemented as a working prototype using the JAVA programming language. In Study 3, a comparative study was conducted to demonstrate the excellence of the new design of attention testing tool(named graphic style tool) over the existing design(named text style tool). A total of 60 subjects participated in user testing sessions where their error frequency, error patterns, and subjective satisfaction were measured through performance observation and questionnaires. Through the task performance measurement, a number of user errors in various types were observed in the existing text style tool. The questionnaire results were also in support of the new graphic style tool, users rated the new graphic style tool higher than the existing text style tool in terms of overall satisfaction, screen design, terms and system information, ease of learning, and system performance.

• Archives of design research
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• v.17 no.2
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• pp.5-14
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• 2004

Introducing human capacities of control and sensation which have been overlooked into Human-Computer Interaction(HCI), Ubiquitous computing, Augmented Reality and others have been researched recently. New vision of HCI has embodied in Tangible User Interface(TUI). TUI allows users to grasp and manipulate bits with everyday physical object and architectural surface and also TUI enables user to be aware of background object at the periphery of human perception using ambient display media such of light, sound, airflow and water movement. Tangibles, physical object which constitutes TUI system, is the physical object embodied digital bit. Tangibles is not only input device but also the configuration of computing. To get feedback of computing result, user controls the system with Tangibles as action and the system represents reaction in response to User's action. User appreciates digital representation (sound, graphic information) and physical representation (form, size, location, direction etc.) for reaction. TUI's characters require the consideration about both user's action and system's reaction. Therefore we have to need the method to be concerned about physical object and interaction which can be combined with action, reaction and feedback.

• 한국HCI학회:학술대회논문집
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• 2006.02b
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• pp.543-548
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• 2006

2005년 발표된 애플사의 아이포드 셔플 디지털 음악 재생기는 오랫동안 잊혀지거나 제대로 사용되지 않았던 음악 재생 방법인 셔플(Shuffle)기능에 대한 재조명을 하고 이를 새로운 사용자 경험으로 만들어 냈다. 본 논문에서는 이와 같은iPod 셔플, 라디오등 음악 콘텐츠의 선곡과 플레이하는 방법에 대해 비교 분석하였으며 이를 통해 보다 향상된 방법으로서 컨텐츠 저장구조를 항해하는것이 가능하면서도 사용자의 특별한 의지에 의한 조종없이도 적절한 선곡을 제공하며 또한 특별한 그래픽 유저 인터페이스 장치를 필요로 하지 않는 방법이 필요함을 고찰하였다. 이러한 분석된 결과를 바탕으로 맥락적 컨텐츠 구성 방법에 관한 새로운 디자인안을 창출하였다. 이 디자인 안은 사용자 사용패턴 추출장치, 가상 채널 형성 장치, 환경 분석 장치로 구성된 지능화된 컴퓨터 시스템에 의해 사용자에게 맥락적인 무작위 음악 재생 방법을 제공하는 것이다.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11b
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• pp.622-624
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• 2005

발전소 시뮬레이터는 발전소 설계의 검증, 제어 시스템의 성능 시험, 제어 시스템 상수 최적화, 새로운 제어 기법의 사전 검증 및 운전요원 훈련과 같은 다양한 목적으로 사용되어진다. 본 논문에서는 발전소 운전요원들의 운영 능력 향상을 위하여 사용자의 이벤트들을 저장하여 사용자 요구 시에 일정 시간 주기로 도면에 설계하는 스크립트 기능과 그래픽 기반의 시뮬레이션을 위한 두 종류의 결과 모니터링 윈도우 그리고 사용자의 다양한 시뮬레이션을 위한 시뮬레이션 속도 변경 기능을 기존의 발전소 시뮬레이터에 설계, 구현한다. 또한 시뮬레이션 속도 변경 기능 확장에 따른 시뮬레이션의 정확성을 판단하기 위하여 수행 결과 데이터를 추출하여 시뮬레이션의 정확성을 검증한다.