• Proceedings of the Korea Electromagnetic Engineering Society Conference
• /
• 2002.11a
• /
• pp.324-327
• /
• 2002

For the characterization of arbitrary shaped printed circuit board, lossy transmission line grid model based on SPICE netlist and analytical plane model based on the segmentation method are proposed in this paper. Two methods are compared with an arbitrary shaped power/ground plane. Furthermore, design considerations for the complete power distribution network structure are discussed to ensure the maximum value of the PDN impedance is low enough across the desired frequency range and to guide decoupling capacitor selection.

• Journal of ILASS-Korea
• /
• v.5 no.2
• /
• pp.68-74
• /
• 2000

A this experimental study is executed to analyze spray characteristics for air-shrouded injector and 4hole 2spray type injector used in a gasoline engine. Since spray parameters including spray penetration and angle, SMD, and atomization characteristics are very important to increase the engine performance, the image processing algorithm for measuring the non-spherical spray diameter is developed. Spray characteristics of the air-shrouded injector(2hole 2spray) and 4hole-2spray injector are analyzed respectively by this digital image processing method. Effective spray characteristics to injectors is derived from this experimentation and obtained the design guide for gasoline injector.

• 한국지구물리탐사학회:학술대회논문집
• /
• 2003.11a
• /
• pp.60-65
• /
• 2003

A new algorithm was developed to interpret joint orientations from a pair of images of the rock slope to overcome the limitation of photographing direction as in the parallel stereophotogrammetric system and to maximize the range of image measurement. This algorithm can be regarded as a modified multistage convergent photographing system. To determine camera parameters in the perspective projection equation that are the major elements in the photogrammetric technique, a new concept was developed by using three ground control points and single ground guide point. This method could be considered to be very simple when compared with other existing methods which use a number of ground control points and complicated analysis processes.

• Digital Contents
• /
• no.11 s.138
• /
• pp.59-59
• /
• 2004

한국데이터베이스진흥센터가 운영하는 데이터베이스 가이드 네트워크 DB가이드넷(Guide.net)이 지난 10월 22일 정보서비스 이용활성화 를 목표로 새롭게 오픈했다. DB가이드넷은 데이터베이스 산업에 종사하고 있는 실무자들에게 데이터베이스 관련 정보 및 지식을 제공하는 사이트로 지난해 10월 한국데이터베이스진흥센터에서 정보통신부가 추진하는 국책사업의 일환으로 서비스를 시작했다. 그동안 DB가이드넷 은 데이터베이스 관련 종사자들에게 데이터베이스 관련 기술자료, 전문가 칼럼, 시장동향, 사례연구, DB Q&A 및 산출물 등의 자료를 제공 했으며, 온라인 교육을 통해 연간 4억5,000만원 가량의 교육비 절감이라는 성과를 내기도 했다. 하지만 기존의 DB가이드넷은 사용자들의 적극적인 참여 기능 및 지식 공유 기능이 부족한 상태였기 때문에 1차 리뉴얼을 통해 여러 가지 기능을 보강하게 됐다.

• Journal of Power Electronics
• /
• v.13 no.6
• /
• pp.919-927
• /
• 2013

This paper proposes a Boundary Current Mode (BCM) control scheme to realize soft switching on a conventional single phase full bridge DC/AC inverter. This technique with the advantages of no auxiliary components, low cost, high efficiency, and simple in control, is attractive for micro-inverter applications. The operation principle and characteristic waveforms of the proposed soft switching technique are analyzed in theory. A digital controller is provided based on that theory. To balance the requirements of efficiency, switching frequency, and inductor size, the design considerations are discussed in detail to guide in BCM inverter construction. A 150W prototype is built under these guidelines to implement the BCM control scheme. Simulation and experiment results demonstrate the feasibilities of the proposed soft switching technique.

• Journal of Korea Multimedia Society
• /
• v.22 no.9
• /
• pp.1080-1090
• /
• 2019

The digital informational era of the 21st century requires the fostering of human resource in the field of software with creativity and personality. This paper deals with the educating method in programming course for non-majors which fosters creativity for problem solving ability and personality using cooperative interaction to build communication ability. We also seek to build a model through DEVS methodology for creative problem solving and analyze the effects of programming education for the cultivation of creativity and personality. Our proposed model is expected to be used as a guide to establish creativity and personality for human resource cultivation in programming education.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2023.11a
• /
• pp.886-887
• /
• 2023

This paper is about the development of kiosks that provide four types of service. Simple UI and educational videos solve the complexity of existing kiosks and provide an intuitive and convenient screen to users. In addition, the AR function, which is a three-dimensional form, shows directions and store representative images. After storing user information in the DB, a learning model is generated using user-based KNN collaborative filtering to provide a recommendation menu. As a result, it is possible to increase user convenience through kiosks using metaverse and AI recommendation services. It is also expected to solve digital alienation of social classes who have difficulty using kiosks.

• Journal of Digital Convergence
• /
• v.11 no.12
• /
• pp.785-791
• /
• 2013

This study, in the perspective of universal design, newly suggests UD-WCAG 2013 for the evaluation of job information sites used by the silver generation. Using this, 13 senior clubs run by social welfare corporations chosen by the central and local government for the silver generation job information provision organizations to analyze the compliance status of web accessibility. The web compliance status analysis was done through a self-assessment tool from Korea Agency for Digital Opportunity and Promotion and UD-WCAG 2013. Although both analyses showed that there weren't differences according to region, the general level of compliance was shown as low. In the UD-WCAG 2013's 7 major categories the part about errors was shown providing appropriate solutions, but in the other parts it was shown that the all 13 websites were being run with insufficient consideration of the social and physical characteristics of the silver generation.

• Journal of Digital Convergence
• /
• v.16 no.5
• /
• pp.385-390
• /
• 2018

This study categorizes cases of industry-wide collaboration works, which is getting more actively conducted in a various forms and purposes for forming fixed brand identity and reinforcing brand identity, by analyzing its characteristics, and suggests new categorization in brand marketing perspective with diverse cases. Furthermore, the concept of collaboration in $4^{th}$ industrial revolution, so-called ICT, IOT, is studied for seeking developmental direction of collaboration which is being. As a result, approaches about application methods of and categorizing methods of collaboration in the aspect of design and branding were seeked. Based on this research, it is expected to be used as a reference for branding and marketing approach to domestic collaboration works, and it is also hoped to help following researches on guide line and following researches on collaboration.

• Journal of Korea Multimedia Society
• /
• v.8 no.3
• /
• pp.362-371
• /
• 2005

This paper presents a digital video broadcasting - terrestrial (DVB-T) receiver system based on the orthogonal frequency division multiplexing (OFDM) modulation method, which has exhibited a good reception performance even with obstacles and a mobile reception. As such, an improved OFDM receiver is developed for a DVB-T system that also considers function expansion for further development. After manufacturing the DVB-T receiver system, the performance of the proposed system is compared with three other hardware systems, all of which are end products. The experimental results confirm the performance using the measured minimum required carrier-to-noise ratio and threshold of visibility signal for each system. In addition, a graphic user interface (GUI) and electronic program guide (EPG) are developed for the digital television user.