• Journal of the Korea Institute of Information and Communication Engineering
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• v.3 no.1
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• pp.235-244
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• 1999

This Paper proposes a new compaction algorithm for IDDQ testing in CMOS Circuits. A primary test pattern is generated by the primitive fault pattern which is able to detect GOS(gate-oxide short) and the bridging faults in an internal primitive gate. The new algorithm can reduce the number of the test vectors by decreasing the don't care(X) in the primary test pattern. The controllability of random number is used on processing of the backtrace together four ones of heuristics. The simulation results for the ISCAS-85 benchmark circuits show that the test vector reduction is more than 45% for the large circuits on the average compared to static compaction algorithms.

• The Proceedings of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.1 no.1
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• pp.75-82
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• 1987

Application of conventional phase controlled power electronic circuits causes reduced power factor and increased harmonic component in the electric sources. Therefore, an Optimal PWM strategy has been investigated here in order to reduce to a large extent these effects mentioned. Optimal PWM converter has been to minimize the rms harmonic current in the sources and has been found to have a duality with Optimal PWM inverter. The voltage patterns of Optimal PWM Inverters are governed by the same switching patterns and control laws as the current patterns for Optimal PWM converter. The improvement requires switching devices having a high speed capability. While this formerly did require thyristors with force commutation circuits, today this feature is easily implemented by using power Transistor or GTOs. The control laws for minimizing the rms harmonics current in the source, the circuits and the results are shown in the paper.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.7
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• pp.1457-1464
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• 2011

In this paper, we go one step further in that the number of competitive layers is not determined by experience but can be determined by fuzzy control rules based on input pattern information. In our method, we design a set of membership functions and corresponding rules and used Max-Min reasoning proposed by Mamdani. Also, we use centroid method as a defuzzification. In experiment that has various patterns of English inputs, this new method works beautifully to determine the number of competitive layers and also efficient in overall accuracy as a result.

• Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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• v.21 no.7
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• pp.103-108
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• 2007

Neural network is used in many fields of control systems currently. However, It is not easy to obtain input-output pattern when neural network is used for the system of a single feedback controller and it is difficult to get satisfied performance with neural network when load changes rapidly or disturbance is applied. To resolve these problems, this paper proposes a new mode to implement a neural network controller by installing a real object in place of activation function of Neural Network output node. As the Neural Network self adaptive control system is designed in simple structure neural network input-output pattern problem is solved naturally and real tin Loaming becomes possible through general back propagation algorithm. The effect of the proposed Neural Network self adaptive control algorithm was verified in a test of controlling the speed of a A.C. servo motor equipped with a high speed computing capable DSP (TMS320C32) on which the proposed algorithm was loaded.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.6
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• pp.17-23
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• 2012

In this paper, we were proposed a new LED light device lighting control algorithm for optimal energy saving. The propose lighting control algorithm be to the LED lights devices lighting control by measuring illuminance into multi sensors. And it be to lighting control by inverting of octagon pattern during set-up time. All the LED is lighting when detecting motion by the motion sensor. And, it was designed enable remote management control by communicate with central monitoring center using Zigbee wireless network to measured data from sensors at real time. In this paper, a proposed lighting control algorithm was measured power consumption about the lighting status of LED lighting device using the lighting control program for demonstrate of energy savings effect. The measured result, the lighting method applying proposed algorithm were proved energy savings effect of more 40% more compared to the existing lighting method.

• Journal of the Korean Vacuum Society
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• v.18 no.4
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• pp.310-317
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• 2009

Vertical wet equipment for the BGA develop process was newly developed substituted for conventional horizontal wet equipment. The benefits of vertical equipment are that the pattern damages generated by the collision between the patterns and transferring rollers can be eliminated because the direct contact between the equipment's transferring units and the soft dry film patterns does not occurs. Taguchi experiment was conducted to optimize the process characteristics for the vertical equipment. The experiment was organized as the smaller the better problem which includes adequate uncontrollable factor and controllable factors. The uncontrollable factors are the 4 sides of two panels which are loaded to the equipment at the same time. By the analysis of the experiment, temperature of the develop chemicals and develop spraying time are analyzed as the main controllable factors. Finally, line pattern's minimum width which is not damaged for the develop process was improved from $13.8{\mu}m$ for the horizontal equipment to $10.4{\mu}m$ for the vertical equipment. And dot pattern's minimum width is improved from $22.1{\mu}m$ to $16.3{\mu}m$.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.315-318
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• 2006

본 논문에서는 TV OSD(On Screen Display) 메뉴 자동검증 시스템에서 문자패턴의 실시간 인식을 위한 방법론을 고찰한다. 이는 일반적인 문자인식 문제와는 달리 시스템 환경에 대한 몇 가지 가정과 제약조건을 고려해야 한다. 예컨대 문제의 특성상 카메라 및 TV 제어 기기부의 동작과 연동하는 작업 스케쥴링 기능과 실시간 분석기능 등의 요건은 시스템개발을 복잡하게 하는 반면, 주어진 OSD 메뉴 데이터로부터 검증과정은 미지 패턴에 대한 인식과정을 단순화하여 일종의 판정(decision) 문제로 고려될 수 있게 한다. 본 연구에서는 인식의 방법론으로서 수정된 구조의 FMM 신경망을 적용한다. 이는 하이퍼박스 기반의 패턴 분류기로서 간결하면서도 강력한 학습기능을 제공한다. 기존의 FMM 모델이 갖는 단점인 학습패턴에서 특징분포와 빈도를 고려하지 못한다는 점을 개선하여, 특징과 하이퍼박스간의 가중치 요소를 고려한 활성화 특성을 정의한다. 또한 실제 데이터를 사용한 실험결과를 통해 제안된 이론의 유용성을 고찰한다.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.930_931
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• 2009

본 논문에서는 잉크젯 프린팅 기술을 이용하여 FPCB의 미세패턴 전극회로를 구현하였다. 이를 위하여 압전 잉크젯헤드에 의한 잉크드롭제어에 의해 전도성 잉크의 프린팅이 가능하도록 구현하였다. 그 동안 PCB 제작은 포토리소그라픽 공정에 의해 13단계 공정을 통하여 제작함으로써 폐수에 의한 환경오염, 비경제적인 비용, 긴 공정시간을 요구하였지만, 잉크젯 프린팅 기술을 적용함으로써 3단계로 공정간소화, 공정시간 단축, 비용절감의 효과를 얻을 수 있었다. 잉크젯 헤드는 당사에서 제작한 128노즐을 적용하였으며 이러한 결과 다음사양을 얻을 수 있었다. 인쇄 전극의 선폭 50um, 선폭 균일도 <15%, 패턴, 패턴 건조 큐어링 온도는 $150^{\circ}C$ 15분, 인쇄 속도 250mm/s, 720 dpi 분해능의 결과를 얻을 수 있었다.

• The Journal of the Acoustical Society of Korea
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• v.18 no.4
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• pp.78-83
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• 1999

This paper concerns a least square method for pattern optimization of a thinned sensor array in which the squared error between a desired pattern and a synthesized one is minimized. A weighting function is applied in the function with respect to the array visual range for a symmetric and asymmetric configuration for sensor spacing. An exponential weighting function is proposed to control the sidelobes efficiently around the mainbeam and to generate a uniform sidelobe. The resulting pattern may be employed to eliminate incoming interferences distributed uniformly around the array visual range.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.39 no.7
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• pp.81-88
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• 2002

A new pattern generator of BIST based on the pattern clustering is developed. The proposed technique embeds a pre-computed deterministic test set with low hardware overhead for test-per-clock environments. The test control logic is simple and can be synthesized automatically. Experimental results for the ISCAS benchmark circuits show that the effectiveness of the new pattern generator compared to the previous methods.