• 수산해양교육연구
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• 제29권1호
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• pp.242-256
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• 2017

The purpose of this study was to describe and understand the characteristics of morphological, contextual as relational aggression among 4-year old children during free play periods. The ethnographic methods included participants observation of children's play interaction behaviors, field notes, video taping and analysis of transcribed date. The results are as exclusion occurred by group power taking the relational attribute, including direct language, while the other would not be revealed easily other than being in line with real relation. Also as follows; proactive relational aggression was more frequently observed in girls, and their major strategies employed against someone they disliked were ignoring them, distorting play-rules, and so on. Major strategies of reactive relational aggression in girls were largely manipulative in nature, for example, 'threatrning their friend' and 'withdrawal of friendship'.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2002년도 전력전자학술대회 논문집
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• pp.657-660
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• 2002

In this paper, the FFT processor for power measurement using VHDL (Very high-speed integrated circuit Hardware Description Language) is discussed. The proposed system relies on the FFT algorithm to compute real and reactive power. The advantage of system is that harmonic analysis is carried out on a period of the Input signal. The proposed system is based on FFT Processor which is designed using VHDL. In the design of FFT processor, $radix-2^2$ is adopted to reduce several complex multipliers for twiddle factor. And this processor adopt pipeline structure. Therefore, the system Is able to have both high hardware efficiency and high performance.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2005년도 춘계학술발표대회
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• pp.461-464
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• 2005

본 논문에서는 실시간 반응형 로봇의 행위를 지정하기에 적합한 에이전트 언어를 소개한다. 기존의 BDI 기반의 에이전트 언어를 기반으로 실시간 반응형 로봇의 행위를 지정하는데 적합하도록 개발한 VivAce 에이전트 구조에 대해서 설명하고 이를 이용한 간단한 시뮬레이션을 수행하였다. 또한 VivAce 가 기존의 BDI 에이전트 언어에 비해서 가지는 새로운 특징인 자바 네이티브 언어 지원, 쓰레드 기반의 계획 실행, 다양한 인터페이스를 소개한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 추계학술대회 논문집 전력기술부문
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• pp.151-153
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• 2002

Using UPFC(Unified Power Flow Controlled), it is possible to control three parameters(voltage, impedance, and phase angle). The UPFC can generate or absorb reactive power rapidly so as to enhance the transient and voltage stability and also influence the power flow. In this paper, the effects of application of the UPFC to the power system are analyzed from a viewpoint of improving the total transfer capability by enhancing voltage stability. The IPLAN, which is a high level language used with PSS/E program, is employed for evaluating the total transfer capability from a f-V curve.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.146-148
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• 2001

The STATCOM(Static Compensator) resulted from the FACTS technology can generate or absorb reactive power rapidly so as to increase the transient stability and voltage stability. In this paper, effects of application of the STATCOM to the power system are analyzed from a viewpoint of improving voltage stability. The voltage stability is analyzed by use of repeated power flow method. The IPLAN, which is a high level language used with PSS/E program, is employed for evaluating the voltage stability.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 춘계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.292-295
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• 2003

Conventional methods in time / frequency domain for evaluating the compensation performance of active power filters are not provided easy solutions. So, the authors have previously proposed 3-D current coordinates which is composed into active component, fundamental reactive component and distorted component of nonlinear loads current. This method has excellent performance, but can not evaluate the characteristics of nonlinear load current whether it is inductive or capacitive. Therefore, To overcome problems mentioned previously, this paper deals with the simple Average power theory and the expanded 3-D current coordinates for evaluating the compensation performance of active power filters. To confirm the validity, active power filters simulator is developed using C-language. From the simulation, results are discuss their utility.

• 한국정보과학회:학술대회논문집
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• 한국정보과학회 1998년도 가을 학술발표논문집 Vol.25 No.2 (1)
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• pp.573-575
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• 1998

실시간 내장형 시스템(real-time embedded system)의 반응 동작(reactive behavior)을 정확하게 분석하기 위해서 상태차트(statechart)에 바탕을 둔 객체 지향 모델링 방법론들이 많이 사용되고 있다. 하지만 이들 방법론들은 경성 실시간 시스템(hard real-time system)이라면 반드시 고려해야할 스케줄링 가능성분석(scheduability analysis)에 필요한 시간에 대한 정보와 시간 제약을 정확히 나타내지 못하는 문제점이 있다. 본 논문에서는 최근 OMG(Object Management Group)에서 객체 지향개발의 기준으로 채택된 UML(Unifies Modeling Language) ver1.1을 사용하여 실시간 내장형 시스템의 반응 동작과 시스템의 시제 동작(temporal behavior)을 모델링하여, 모델링된 시스템이 스케줄링 가능성 분석이 효과적으로 이루어지는 방안을 제안한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1995년도 하계학술대회 논문집 B
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• pp.637-639
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• 1995

Since power systems tend to be more large and complex, expert system substituted for the decision-making achieved by the power system operation expert is required. So far, expert system has been used for fault diagonosis and voltage-reactive power control and so on. In the expert system developed using 'C' language, the faulted element is estimated using the AND operation of lists which are acquired from the information on operated relays. It is also considered to identify the misoperation of protective devices using CF(Certainty Factor), and operation failure of those using the data base of parameter group list. The developed expert system is applied to a 6-bus sample system and through the case studies. It is shown that the expert system is very useful.

• Bulletin of the Korean Chemical Society
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• 제35권5호
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• pp.1506-1510
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• 2014

A kinetic study on nucleophilic substitution reaction of 5-nitro-8-quinolyl picolinate (6) with alkali-metal ethoxides (EtOM; M = K, Na, and Li) in anhydrous ethanol is reported. The plot of $k_{obsd}$ vs. [EtOM] curves upward in the absence of crown ethers but is linear with significantly decreased reactivity in the presence of crown ethers. Dissection of $k_{obsd}$ into $k_{EtO}$- and $k_{EtOM}$ (i.e., the second-order rate constants for the reactions with the dissociated $EtO^-$ and ion-paired EtOM, respectively) has revealed that the ion-paired EtOM is significantly more reactive than the dissociated $EtO^-$ (e.g., $k_{EtOM}/k_{EtO^-}$ = 33.4-141). This indicates that the reaction of 6 is catalyzed by $M^+$ ions in the order $Na^+$ > $Li^+$ > $K^+$ and the catalytic effect disappears in the presence of a proper crown ether. Picolinate ester 6 is much more reactive and is more strongly catalyzed by $M^+$ ions than 5-nitro-8-quinolyl benzoate (5). It has been concluded that $M^+$ ions catalyze the reaction of 6 by increasing electrophilicity of the reaction center through a cyclic transition state, which is structurally not possible for the reaction of 5.

• 정보처리학회논문지D
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• 제17D권6호
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• pp.431-442
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• 2010

임베디드 시스템은 하드웨어와 소프트웨어 요소들이 서로 결합된 시스템이기 때문에 설계 시 실시간성(Real-time), 반응성(Reactive), 소규모(Small Size), 경량화(Low Weight), 안전성(Safe), 신뢰성(Reliable), 견고성(Harsh Environment), 저비용(Low Cost) 등의 요소들을 고려하여 설계해야 한다. 그러나 현재 임베디드 시스템 개발에 이러한 요소들을 반영한 설계 기법들이 미비하게 제시되어 있다. 특히 임베디드 시스템 개발에 있어서 프레임워크를 기반으로 임베디드 시스템을 개발하는 형태가 거의 이뤄지고 있지 않다. 이로 인해 현재 개발되어 있는 임베디드 시스템들의 내부 코드들을 살펴보면 시스템 작동과 전혀 상관이 없는 코드들이 무수하게 잔재하고 있으며, 임베디드 시스템 개발에 있어서 재사용성이나 가변성에 대한 고려가 미흡한 실정이다. 따라서 본 연구에서는 임베디드 시스템의 재사용성을 향상시키기 위해 제안했던 재사용 프레임워크 설계에 대한 완전성이나 일관성을 보장하기 위해 Z를 이용하여 프레임워크 설계에 대한 정형 명세 기법을 제시하고자 한다. 또한 Z 언어를 통해 명세한 결과를 Z-Eves Tool을 통해 Z 모델 체킹을 수행하여 프레임워크 설계의 명확성을 보이고자 한다.