• Proceedings of the Korea Information Processing Society Conference
• /
• 2017.04a
• /
• pp.387-390
• /
• 2017

최근 현대 사회에 '가상현실'개념이 도입됨에 따라 '가상현실'기술이 적용된 게임 콘텐츠들이 활성화되고 있는 추세이다. 이와 더불어 기존의 GUI와 NIUI에서 발전된 새로운 인터페이스로 텐저블 인터페이스(Tangible Interface)가 급부상하면서 관련 인터페이스를 활용한 연구 또한 필요한 시점이며, 이를 기반으로 하여 '가상현실'기술과 텐저블 인터페이스를 융합한 새로운 게임 콘텐츠를 제안을 하고자 '가상현실' 기기를 활용한 텐저블 인터페이스 기반의 학습용 Unity 3D 게임 콘텐츠를 제작하였다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2017.04a
• /
• pp.1017-1019
• /
• 2017

데스크탑 성능의 상향과, 그래픽 소프트웨어의 발전으로 더욱 현실적이고 자연스러운 컴퓨터 그래픽을 지원하는 게임에 대한 수요가 증가하고 있다. 3D 게임 내에서 사용자들의 게임 수행 능력과 컴퓨터 그래픽의 자연스러움은 초당 프레임 수(FPS)에 비례하므로, 더 높은 초당 프레임 수를 보장한다면 발전된 게임 수행 능력을 기대할 수 있다. 따라서 본 논문에서는 크로스 플랫폼을 지원하는 대표적인 게임 엔진인 Unity 3D와 오픈 그래픽 라이브러리인 OpenGL 간의 초당 프레임 수를 비교한다. 이를 바탕으로 추후 3D 물체에 대한 자연스러운 움직임에 대한 연구를 수행할 수 있을 것으로 예상한다.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.62 no.3
• /
• pp.145-150
• /
• 2013

A novel AC to DC PWM converters with unity input power factor are proposed to overcome the above shortcoming. The main function of these converters is to shape the input line current to force it exactly in phase with the input AC voltage. Therefore, the input power factor can be improved to near unity and the input current harmonics can be eliminated. In this paper, half-bridge converter with two active switches and two diodes are utilized for low-cost type UPS configuration. By having only two semiconductors in the current path at any time, losses can be reduced over the conventional boost topology. Also, this converter provides controllable dc-link voltage, high power factor, and low cost type converter by simple power circuits. Simulation results show that the proposed half-bridge converter/inverter control technique can be applied to single-phase low-cost type UPS systems successfully.

• Journal of Power Electronics
• /
• v.18 no.2
• /
• pp.323-331
• /
• 2018

Buck power factor correction (PFC) converters, compared with conventional boost PFC converters, exhibit high efficiency performance in the entire range of universal line voltage. This feature has gotten more attention for eliminating the zero crossing dead angle of buck PFC rectifiers. Furthermore, bridgeless structures for the reduction of conduction losses have been proposed. The aim of this paper is to introduce a single-phase buck rectifier that simultaneously has unity power factor (PF) and bridgeless structure while operating in the continuous conduction mode (CCM). For this purpose, two auxiliary flyback converters without any active switches are applied to a bridgeless buck rectifier to eliminate the zero crossing dead angle and achieve unity power factor, low total harmonic distortion (THD) and high efficiency. The operation and design considerations of the proposed rectifier are verified on a 150W, 48V prototype using a conventional peak-current-mode control. The measurement results show that the proposed rectifier has nearly unity power factor, THD less than 7% and high efficiency.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2015.01a
• /
• pp.193-194
• /
• 2015

본 논문은 유니티 엔진을 이용하여 쉽게 접할 수 있는 아케이드 형식의 게임에 미니게임을 추가하여 사용자들에게 게임에 대한 재미를 주기 위한 목적으로 제작되었다. 유니티 엔진을 이용하며 게임을 제작하면, 다른 엔진에 비해 저렴하면서도, 게임 개발시간을 단축하여 개발 비용을 줄일 수 있다. 또한 게임의 질도 떨어지지 않고 게임으로 제작할 수 있다. 현재 시중에 선보이고 있는 게임들은 잔인함과 선정적인 것이 많은 편이나, 본 게임은 어린이부터 노약자들 까지 다양한 연령층이 즐길 수 있도록 제작하였다.

• International Commerce and Information Review
• /
• v.9 no.4
• /
• pp.265-288
• /
• 2007

This study analyzed which conflict management norm was preferred according to unique cultural difference of nation and such conflict management norm influences on conflict management type in solving real conflict when conflict in organization occurs and such conflict norm had a preference and influence on conflict management type in solving real conflict through such conflict management norm. As the result, first, Korean managers showed still high attitude on group interest and aimed to negotiation. But they highly depended on control. Canada managers showed discussion norm of individual interest and performed conflict management laying stress on unity and negotiation. second, as for conflict management of negotiation, both Canada and Korea performed it on the based of his or her interest discussion and as for plural agenda unity positively influenced to unity conflict management in Korea but in Canada, attitude for the future negatively influenced.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2015.05a
• /
• pp.517-518
• /
• 2015

In this research, the application of GPS and Gyro sensor based FlyingDisc with the value of 3D position and circulation sensors was proposed for school physical education. 3D Unity for 3 dimensional expression of sensors was applied for the 3D position and circulation direction from the FlyingDisc.

• Proceedings of the Computational Structural Engineering Institute Conference
• /
• 2006.04a
• /
• pp.357-364
• /
• 2006

The meshfree method is extended by the local partition of unity method to model the cohesive cracks in two dimensional continuum The shape function of a particle whose domain of influence is completely cut by a crack is enriched by the step enrichment function. If the domain of influence contains a crack tip inside, it is enriched by the branch enrichment function without the stress singularity. It is found that this method is more accurate and converges faster than the meshless methods for LEFM cracks based on the visibility concept Several staic and dynamic examples are solved to verify the method.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2017.01a
• /
• pp.125-128
• /
• 2017

모바일게임이 발전하면서 여러 디스플레이 제품과 유동적 연결이 가능하게 되었고 이를 통한 쾌적한 게임 환경이 가능하게 되었으나, 여전히 게임의 컨트롤러가 게임 진행 화면을 가려 몰입감이 떨어진다. 그렇기 때문에 Unity 3D 엔진을 이용한 First-person Shooter 게임 제작과 게임 컨트롤을 위한 Android Device Controller를 이용하여 외부 디스플레이 연결 시 컨트롤러와 게임화면이 분할되는 시스템을 개발하였다. 사용자가 모바일 디바이스를 게임 컨트롤러로 사용하여 콘솔게임 환경과 같은 편리한 조작이 가능하게 하는 효과가 있다.

• Journal of Power Electronics
• /
• v.7 no.1
• /
• pp.55-63
• /
• 2007

This paper proposes a simple unity power factor zero-voltage-transition (ZVT) pulse-width-modulated (PWM) single-phase rectifier, which features reduced switching and conduction losses. The switching loss reduction is achieved by a simple auxiliary commutation circuit, and the conduction loss reduction is achieved by employing a single-stage converter, rather than a typical double-stage converter comprising of a front-end rectifier and a boost rectifier. Furthermore, thanks to good features such as a simple PWM control at constant frequency, low switch stress, low Var rating of commutation circuits, and simple power circuit structure, it is suitable for high power applications. The principles of operation are explained in detail, and a major characteristics analysis and the experimental results of the new converter are also included in this paper.