• 한국음향학회지
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• 제20권3호
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• pp.15-23
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• 2001

본 논문에서는 임의의 사람이 발성한 음성을 마치 다른 사람이 발성한 것처럼 들리도록 하는 음성변환 기술에 대하여 설명하고, 화자간의 성도 특성과 여기신호 특성 파라미터 변환을 독립적으로 수행하기 위한 변환방법을 실험한다. 성도 특성 파라미터 변환은 입력되는 음성신호에서 LPC (Linear Predictive Cofficient)켑스트럼을 추출하여 선형다변회귀모델에 적용하여 수행하고, 여기신호 특성 파라미터 변환은 잔차신호를 추출하여 LP-PSOLA (Linear Predictive-Pitch Synchronous Overlap and Add) 합성방식을 이용한 화자간의 평균 피치주기 변환으로 수행된다. 실험결과는 선형다변회귀모델과 LP-PSOLA 합성방식을 이용하여 변환된 음성이 대상화자의 음성에 유사함을 보여준다

• 한국컴퓨터정보학회논문지
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• 제9권4호
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• pp.85-91
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• 2004

최근 들어 인간의 의지를 컴퓨터에 전달하기 위한 수단으로 컴퓨터 시각기반 방식으로 제스처를 인식하고자 하는 연구가 널리 진행되고 있다. 제스처 인식에서 가장 중요한 이슈는 알고리즘의 단순화와 처리 시간의 감소이다. 이러한 문제를 해결하기 위하여 본 연구에서는 기하학적 집합론에 근거하고 있는 수학적 형태론을 적용하였다. 본 논문에서 제안한 알고리즘의 키 아이디어는 형태론적 형상분해를 적용하여 얻은 원시형상 요소들의 중심점을 연결하는 궤적을 추적하는 것이다. 핸드 제스처 시퀀스의 중심점 궤적은 핸드 제스처의 형상에 관련된 중요한 정보를 내포하고 있다. 이러한 특징에 근거하여 본 연구에서는 원시형상 요소들의 중심점 궤적과 직접적으로 관련되는 체인코드 에지벡터로부터 형상의 특징벡터를 계산하여 핸드 제스처 시퀀스를 인식할 수 있는 알고리즘을 제안하고, 실험을 통하여 그 유용성을 증명하였다.

• 센서학회지
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• 제17권1호
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• pp.41-52
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• 2008

In this paper, a circuit analysis of the complementary CMOS active pixel and readout circuit is carried out. Complementary pixel structure which is different from conventional 3TR APS structure is consist of photo diode, reset PMOS, several NMOSs and PMOSs sets for complementary signals. Photo diode is modelled with Medici device program. HSPICE was used to analyze the variation of the signal feature depending on light intensity using $0.5{\mu}M$ standard CMOS process. Simulation results show that the output signal range is from 0.8 V to 4.5 V. This signal range increased 135 % output dynamic range compared to conventional 3TR pixel in the condition of 5 V power supply.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.508-513
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• 2000

Micro wave seeker detects micro wave signal reflecting from a object and modifies the angle of a antenna in the direction of a reflecting signal. Gimbal structure makes a motion in the direction of an elevation axis and an azimuth axis and change the direction of a missile toward a object. As before, Micro wave seeker is a important part of a missile. Especially, gimbal structure is designed to resist a external force generated by a strong propelling power. For that reason, it is essential to analyze a vibration feature of gimbal structure. In this paper, we analyze dynamic characteristics of a gimbal structure of a micro wave seeker. And we measure frequency response functions of a gimbal structure in order to investigate the effect of a pre-load on bearing.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2000년도 춘계학술대회논문집
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• pp.1210-1215
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• 2000

일반적인 형태의 동적 시스템에 가해지는 외란이 유색잡음이며, 외란의 형태가 시간에 따라 불규칙하게 변할 때와 감쇠계수와 강성계수가 시간에 따라 불규칙하게 변할 때의 그 확률 시스템의 특성과 제어기법에 대하여 연구하였다. 고려된 물리적인 모델은 불규칙한 대기교란을 받는 항공익으로써 이는 "시변계"가 되며 그 지배방정식이 확률론적 관점에서 F-P-K 접근법으로 유도되었으며, "유색잡음용 허-확률제어기"의 효과를 확률 영역 및 시간영역에서 고찰하였다. 또한 확률론적 플러터경계에 대해서도 고찰하였다.

• International Journal of Control, Automation, and Systems
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• 제6권3호
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• pp.424-433
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• 2008

An ownship with towed array sonar (TAS) has limited maneuvers due to its dynamic feature, bearing and frequency measurements of a target which are not detected continuously but are often lost in ocean environment. We propose a pre-processing algorithm for the faded bearing and frequency measurements to solve the BFTMA problem of TAS under limited detection conditions. The proposed pre-processing algorithm to restore the faded bearing and frequency measurements is implemented to perform a BFTMA filter even if the measurements of a target are not continuously detected. The Modified Gain Extended Kalman Filter (MGEKF) method based on the Interacting Multiple Model (IMM) structure is applied for a BFTMA filter algorithm to estimate the target. Simulations for the various conditions were carried out to verify the applicability of the proposed algorithms, and confirmed superior estimation performance compared with the existing Bearings-Only TMA (BOTMA).

• Journal of Electrical Engineering and Technology
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• 제8권1호
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• pp.20-30
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• 2013

An intelligent grid computing architecture is proposed and developed for transient stability constrained total transfer capability evaluation of future smart grid. In the proposed intelligent grid computing architecture, a model of generalized compute nodes with 'able person should do more work' feature is presented and implemented to make full use of each node. A timeout handling strategy called conditional resource preemption is designed to improve the whole system computing performance further. The architecture can intelligently and effectively integrate heterogeneous distributed computing resources around Intranet/Internet and implement the dynamic load balancing. Furthermore, the robustness of the architecture is analyzed and developed as well. The case studies have been carried out on the IEEE New England 39-bus system and a real-sized Chinese power system, and results demonstrate the practicability and effectiveness of the intelligent grid computing architecture.

• The Journal of Asian Finance, Economics and Business
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• 제4권4호
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• pp.39-49
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• 2017

Religious intolerance has become a common feature of many countries in recent times. Studies have revealed a worldwide increase in government regulations and social hostilities against religious beliefs and practices. The stifling impact of both government and society on the market for religion, warrants closer scrutiny. This study examines the relationship between government regulations and social hostilities towards religious beliefs and practices, for the period of 2001-2011 for a sample of 45 European countries. The Generalized Method of Moments dynamic panel estimation technique is employed to analyze the micro panel dataset of 45 European countries, to establish the possible relationships that may exist between these variables. The theoretical framework for this study is based on the Religious Economies Theory and the Supply Side Theory of Religion. The results of this study show evidence of the positive relationship between government regulations and social hostility. Interestingly, the study also revealed that the impact of social hostility on the level of government restrictions is smaller in magnitude compared to the reverse impact of government restrictions on social hostilities, indicating the dangerous role played by governments in inciting social hostilities, when they regulate or restrict religious beliefs and practices.

• 복식문화연구
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• 제22권5호
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• pp.688-701
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• 2014

This study examined the expression characteristics in pop art works of Jean-Charles de Castelbajac. The study here aimed at possibility to find a design development in building up the unique art world of creativity based on popularity, artistry, and originality without confinement to the trend only. For the research method, review of literature and analysis about Castelbajac's works reflecting the pop art feature in the collections from 2000S/S to 2012F/W were performed. The results of research are as follows. The external expression form of Castelbajac's works based on pop art was grouped roughly into use of mass culture image, appropriation of pop art expression technique, and parody of art works. First, his work appeared as application of the mass culture image such as symbolic thing in the modern consumer society, object in an ordinary life, character of well-known animation, national flag and famous star. Second, such appropriated pop art techniques showed as pop color in strong primary color and silk screen, photomontage, collage, assemblage, graffiti, and lettering. Third, a variety of images featured earlier in art works were shown in parody. These works are valuable in that they are expressed aesthetically through regeneration of popular culture's various images in view of fashion, they are described in the non-traditional value with frolic resistance and deviation out of existing fashion norm, and they are given the dynamic creativity integrated with art and fashion.

• 한국콘텐츠학회논문지
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• 제2권3호
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• pp.119-126
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• 2002

이동망에서의 서비스 품질은 중요한 망 설계 요소중의하나이다. 특히, All-IP망에서 VoIP와 같은 실시간 응용은 망 링크간에 이동 호스트의 전이시 발생할 수 있는 패킷 손실을 최소로하는 smooth handoff가 필요하다. 본 논문에서는 MH가 All-IP를 지원하는 다른 망으로 이동시에 패킷 손실을 줄일 수 있는 동적 버퍼링 기반의 새로운 멀티캐스트 알고리즘을 제안한다. 새로운 프로토콜의 핵심 요소는 동적 버퍼링과 멀티캐스트 데이터그램 전달 경로를 줄이기 위해 멀티캐스트 라우팅 에이젼트(MRA) 개념을 도입한 것이다. 제안된 프로토콜은 짧은 라우팅 경로 및 이동 호스트에 근접한 노드에서 이동 호스트로의 직접 데이터그램 전송을 통하여 성능 향상을 기대할 수 있다.