• Smart Media Journal
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• v.13 no.4
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• pp.94-103
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• 2024

The eyeball input system is a text input system designed based on 'eye tracking technology' and 'virtual keyboard character-input technology'. The current virtual keyboard structure used is a rectangular QWERTY array optimized for a multi-input method that simultaneously utilizes all 10 fingers on both hands. However, since 'eye-tracking technology' is a single-input method that relies solely on eye movement, requiring only one focal point for input, problems arise when used in conjunction with a rectangular virtual keyboard structure designed for multi-input method. To solve this problem, first of all, previous studies on the shape, type, and movement of muscles connected to the eyeball were investigated. Through the investigation, it was identified that the principle of eye movement occurs in a circle rather than in a straight line. This study, therefore, proposes a new key arrangement wherein the keys are arranged in a circular structure suitable for rotational motion rather than the key arrangement of the current virtual keyboard which is arranged in a rectangular structure and optimized for both-hand input. In addition, compared to the existing rectangular key arrangement, a performance verification experiment was conducted on the circular key arrangement, and through the experiment, it was confirmed that the circular arrangement would be a good replacement for the rectangular arrangement for the virtual keyboard.

• 동물약계
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• no.81
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• pp.3-4
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• 2002

[ $\cdot$ ]구제역 방역 추진 현장간담회 참석 $\cdot$구제역 등 방역관리위반 신고포상금 지급 $\cdot$국립수의과학검역원 직제 개편 $\cdot$광견병 예방약 조기생산 협조 요청 $\cdot$구제역 방역 특별대책 시달 $\cdot$주의약품지정고시 관련 회의 참석 $\cdot$국가검정동물용의약품 검정항목 일부 생략 $\cdot$동물약사감시 행정처분 결과 홍보 $\cdot$구제역 방역용 소독약품 가격 조사 $\cdot$2001년도 시설개선사업 지원사업 이월 신청 $\cdot$(주)한동 홈페이지 개설 $\cdot$동물약품제조용 양허관세적용 유당 배정

• Journal of Korean Neurosurgical Society
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• v.30 no.5
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• pp.662-665
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• 2001

Spinal cavernous hemangiomas of the cauda equina are extremely rare vascular malformations. We report a case of intradural extramedullary cavernous hemangioma of the cauda equina with it's clinical, radiologic and surgical findings. This is the twelveth case of cavernous hemangioma of the cauda equina in the literature. The pertinent literatures are reviewed.

• Journal of Engineering Education Research
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• v.7 no.3
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• pp.32-38
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• 2004

We present a new collaboration model between industry and university through the case study of LG Electronics and Handong Global University. The aim of this education-oriented model is providing highly competitive engineers to the fields instead of accomplishing research projects or developing a new high-end technology. The proposed cooperation model is a win-win strategy for both academia and industry to have not only short-term but also long term benefits. We discuss how to develope and manage the demand-driven course which is the core program of our model. And we also evaluate the pros and cons of this collaboration model.

• The Journal of the Korea Contents Association
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• v.21 no.7
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• pp.558-566
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• 2021

This study was conducted to classify college students using games based on the stress, satisfaction and balance of basic psychological needs and to identify how gaming behaviors differ according to the divided clusters. This study used data of 447 college students who used games with the support of JangHoon Scholarship Foundation. As a result, the college students using games were divided into four groups with different characteristics according to stress, satisfaction and balance of basic psychological needs. Also, the level of gaming behavior was different according to the degree of satisfaction of basic psychological needs. The lower the stress and the higher the balance when the level of satisfaction was similar, the lower the level of gaming behaviors was. This study confirmed the importance of satisfactory balance of basic psychological needs as well as satisfaction, and supported the biopsychological perspective by suggesting that there are significant differences in gaming behavior according to clusters.

• Journal of the Korea Computer Graphics Society
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• v.25 no.3
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• pp.133-142
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• 2019

In physics-based character animation, trajectory optimization has been widely adopted for automatic motion synthesis, through the prediction of an optimal sequence of future states of the character based on its system dynamics model. In general, the system dynamics model is neither in a closed form nor differentiable when it handles the contact dynamics between a character and the environment with rigid body collisions. Employing smoothed contact dynamics, researchers have suggested efficient trajectory optimization techniques based on numerical differentiation of the resulting system dynamics. However, the numerical derivative of the system dynamics model could be inaccurate unlike its analytical counterpart, which may affect the stability of trajectory optimization. In this paper, we propose a novel method to derive the closed-form derivative for the system dynamics by properly approximating the contact model. Based on the resulting derivatives of the system dynamics model, we also present a model predictive control (MPC)-based motion synthesis framework to robustly control the motion of a biped character according to on-line user input without any example motion data.

• Journal of Software Engineering Society
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• v.28 no.1
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• pp.13-22
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• 2019

To enhance effective and efficient applications of automated security vulnerability checkers in highly competitive and fast-evolving IT industry, this paper studies a comprehensive set of security bug checkers in open-source static analysis frameworks and how they can be utilized for source code inspections according to the security vulnerability inspection guidelines by MOIS. This paper clarifies the relationship be tween all 42 inspection criteria in the MOIS guideline and total 323 security bug checkers in 4 popular open-source static analysis frameworks for Java web applications. Based on the result, this paper also discuss the current challenges and issues in the MOIS guideline, the comparison among the four security bug checker frameworks, and also the ideas to improve the security inspection methodologies using the MOIS guideline and open-source static security bug checkers.

• The Journal of the Korea Contents Association
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• v.22 no.10
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• pp.840-850
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• 2022

The purpose of this study is to translate The Digital Addiction Scale for Children(DASC) developed by Hawi, Samaha and Griffiths into Korean and to verify its validity. To translate and validate the original scale developed for 9-12 years old, 294 people aged 9-12 years who usually use digital devices, and exploratory factor analysis, confirmatory factor analysis, internal consistency, and validity analysis were conducted. In addition, reliability and validity analysis were conducted to confirm that this scale is a tool to measure the digital addiction of Korean children with high confidence level and validity. This study is meaningful in that it laid the foundations for related research by adapting and validating the digital addiction scale for children, which complements the limitations of the preceding measures, in accordance with the domestic situation in the situation where the digital addiction problem of children is getting serious.

• Journal of the Korean Institute of Rural Architecture
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• v.25 no.1
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• pp.1-8
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• 2023

This is a case study of private sector's development of long-term unexecuted urban parks in Pohang through a special act, which provides a guideline of 30% of land for non-park while 70% of land for park. The strategy has a lot of validity in many respects along with the urban planning sunset system, but even with the special act it would not easy to be implemented in Pohang, where the guideline has been modified to 20% for non-park, mostly multi-family housing projects while 80% for park. Thus, participation of private companies would be discouraged due to low commercial validity. Also, there would exist various risks because the project would be completed through a long-term decision-making and execution process. Thus, this study argues that it would be better for Pohang to follow the original guideline of the government for better implementation of the projects, along with preparation of a law with which the government be able to recoup excess profits when too much profits would be given to private developers. For the project implemented smoothly, it is also important to understand local housing market and fluctuating economic conditions, and to prepare various incentives for private companies. In addition, to secure publicity, guidelines on the level of publicity of the project should be prepared through negotiation by parties to prevent the project being discouraged too much.

• Smart Media Journal
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• v.11 no.9
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• pp.81-93
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• 2022

In an era where non-face-to-face meetings become common, eXtended Reality(XR) is rapidly developing and filling areas that are not satisfied in online meetings based on existing photos/video method. In particular, general users are also able to easily access and use HMD-type mixed reality devices. However, the basic operations applied in HMD-type in Mixed Reality(MR) with hands as the main input tool do not have a standardized system, and each manufacturer operates in a separate response to each other's hand movements. Therefore, this study considered that a systematic hand motion matching system considering the usability and efficiency of operations performed in mixed reality was necessary, and conducted a study to clarify this. First, the basic operation performed in the MR environment and its attributes were investigated, and at the same time, the structure of the hand and the attributes of the possible hand movements were identified. Based on the identified properties, it is intended to present a system that can intuitively and efficiently match basic operation properties in the MR environment with subtle operation properties according to the structure/context of the hand.