• 한국자동차공학회논문집
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• 제7권5호
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• pp.9-15
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• 1999

A digital CDI(Capacitive Discharge Ignition) system on small two stroke motorcycle engine was developed in this paper, This CDI system with microprocessor as its main part has more flexible spark timing than the conventional CDI system because of its programmable characteristics. The principle of this digital CDI system and the design methods of hardware and software were presented in this paper, Two stroke small engine was tested to investigate the performance of digital CDI system And also this system was investigated to optimize the engine performance. Also comparison between conventional CDI can provide better spark timing variation than the conventional system. The part and full load test results show that the engine power was increased about 10-20% and fuel consumption was decreased about 10-20% simultaneously. Furthermore, this digital CDI system has simple structure, low cost and very little modification are required. It is a promising technology to substitute for the widely used conventional CDI system.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2012년도 춘계학술대회
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• pp.202-206
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• 2012

본 논문에서는 세포가 지니는 자가 복구 기능을 모사한 디지털 시스템 설계에서의 설계 방향에 대해 연구한다. 세포의 본래 구조인 3차원 배열이 아닌 FPGA를 이용하여 Cell들을 2차원 구조로 설계하고 효율적인 오류검출을 위한 블록배열 방법에 대해 알아보았다. 일정한 규칙성을 지닌 방법으로 설계를 하므로 전체 디지털 회로를 세부적으로 나누어 배열 시 쉽고 빠르게 검출할 수 있다.

• 한국정보통신학회논문지
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• 제16권6호
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• pp.1306-1311
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• 2012

본 논문에서는 세포가 지니는 자가 복구 기능을 모사한 디지털 시스템 설계에서의 설계 방향에 대해 연구한다. 세포의 본래 구조인 3차원 배열이 아닌 FPGA를 이용하여 Cell들을 2차원 구조로 설계하고 효율적인 오류검출을 위한 블록배열 방법에 대해 알아보았다. 일정한 규칙성을 지닌 방법으로 설계를 하므로 전체 디지털 회로를 세부적으로 나누어 배열 시 쉽고 빠르게 검출할 수 있다.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2007년도 추계학술대회 논문집
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• pp.31-33
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• 2007

In this paper, a simple digital control scheme for the single/parallel module buck converters is proposed using a digital state feedback control method. The discrete state feedback controller structure for the robust tracking control is derived by using the error state. The proposed control system can precisely achieve the interleaved current sharing and the output regulation, and can achieve the systematical controller design for a given converter specification using the pole placement technique. For a design example, the single module buck converter is simulated using the MATLAB Simulink software and two 100W parallel module buck converters with a TMS320F2812 DSP is implemented.

• 한국실내디자인학회논문집
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• 제41호
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• pp.266-274
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• 2003

Synectics is one of several techniques used to enhance brainstorming by taking a more active role and introducing metaphor and structure into the process. It is unclear at what level of specificity this should be formulated as a pattern. This thesis reviews recent computational as well as experimental work on analogical reasoning based on synectics. New results regarding information processing of analogical reasoning stages, major computational models and recent attempts to compare these models are reviewed. Computational models are also discussed in the computational as well as cognitive psychology perspectives. Future directions in analogical reasoning research are proposed. The following import is the need to accommodate the typology and normal assessment in the concrete circumstances where actual reasoning and problem solving take place. In order to get to this end, we used computational models by Thagard who take the stand of ‘Computational Philosophy of Science’, which assumes ‘Weak AI’ to explicate what constitute the very pecularity of Analogical Reasoning.

• 대한전기학회논문지:전력기술부문A
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• 제48권7호
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• pp.903-908
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• 1999

In this paper, it is proposed the phase shifter array active system to receive digital satellite broadcasting for vehicle. To receive satellite broadcasting data in vehicle, it is inevitable to have active antenna system, which traces the satellite in real time. Also if it is used in vehicle, it must be thin and light structure. To develop this type of antenna system, several techniques should be integrated properly. These are the design and manufacturing technique of high gain antenna, algorithm for tracking satellite and its manufacturing technique, controller design and manufacturing technique, system integration technique and so on. The validity of the proposed AVDBS system was confirmed by simulation and experimental results.

• 한국가구학회지
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• 제19권4호
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• pp.283-293
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• 2008

This study is intended to forecast changes in Ubiquitous technology-based residential environment since the digital revolution so as to suggest the direction of furniture design in the near future. Among Ubiquitous technologies, the intelligent digital technology applied to a residential environment is defined as "Smart Digital Technology." Ministry of Commerce, Industry and Energy named the residential environment where such technology is applied "Smart Home." Smart Home is strategically creating intelligent residential environment where interactivity is made between human, furniture and residential environment, based on home automation, home network and intelligent sensor technology. Smart furniture is based on strategic characteristics of smart home. Its convergence with IT equipments is being made. Largely, smart furniture has three characteristics as below: First, smart furniture provides users with information on home management, health management, education and fashion. not just functioning as storage space. Second, smart furniture that is a new lifestyle pattern will suggest a new aesthetic standard based on unsettled shapes and innovative structure. Finally, it gives convenience to users intelligently. Namely, smart furniture, "intelligent informative furniture", will be suggested as a new paradigm.

• 한국게임학회 논문지
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• 제5권3호
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• pp.25-30
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• 2005

현재 게임 레벨 디자인은 게임 유저로 하여금 게임에서 일정수준의 재미를 느낄 수 있게 게 임을 구상하고 적용하는 것으로 게임개발과정에서 중요한 역할을 해왔다. 이러한 레벨 디자인은 레벨 디자이너에 의해 설계되어 왔으며, 대부분의 게임 개발팀에서는 한 레벨 디자이너가 한 레벨씩 맡아서 설계하고 있다. 따라서 게임이 복잡해질수록 레벨 디자이너의 숫자는 늘어나고, 다양한 레벨을 만들기 위해 들어가는 인력과 작업시간은 늘어나야 한다. 본 논문에서는 레벨 구조에 배회 에이전트를 도입하여 하나의 레벨만으로도 다양한 레벨들의 효과를 경험해 볼 수 있도록 레벨 구조가 동적으로 변환되는 방법을 제안한다. 또한 배회 에이전트에 의해서 사용자들 간의 밸런스 조절도 가능함을 보이고자 한다.

• 전기학회논문지
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• 제60권12호
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• pp.2286-2292
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• 2011

In this paper we present the design of Low Noise Amplifier(LNA), mixer and filter for RF front-end part of partial discharge monitoring system. The monitoring system of partial discharge in high voltage power machinery is used to prevent many kinds of industrial accidents, and is usually composed of three parts - sensor, RF front-end and digital microcontroller unit. In our study, LNA, mixer and filter are key components of the RF front-end. The LNA consists of common gate and common source-cascaded structure and uses the resistive feedback for broad band matching. A coupled line structure is utilized to implement the filter, of which size is reduced by the meander structure. The mixer is designed using dual gate structure for high isolation between RF and local oscillator signal.

• 한국CDE학회논문집
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• 제7권4호
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• pp.269-279
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• 2002

Geometric shape morphing is an interesting geometric operation that interpolates two geometric shapes to generate in-betweens. It is well known that Minkowski operations can be used to test and build collision-free motion paths and to modify shapes in digital image processing. In this paper, we present a new geometric modeling technique to control the morphing on geometric shapes based on Minkowski sum. The basic idea develops from the linear interpolation on two geometric shapes where the traditional algebraic sum is replaced by Minkowski sum. We extend this scheme into a Bezier-like control structure with multiple control shapes, which enables the interactive control over the intermediate shapes during the morphing sequence as in the traditional CAGD curve/surface editing. Moreover, we apply the theory of blossoming to our control structure, whereby our control structure becomes even more flexible and general. In this paper, we present mathematical models of control structure, their properties, and computational issues with examples.