• 제어로봇시스템학회논문지
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• 제10권2호
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• pp.103-111
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• 2004

In this survey paper, we attempt to introduce the subjects of fuzzy logic and neural network technology for flight control systems based on completed and ongoing research programs other developed countries. Also, it is prepared with intention of providing the reader with an overview of related topics and a basic concepts of fuzzy logic and neural network control. The focus is on relatively practical control schemes realistically applicable in the area of flight control system design that could find its usage in the near future in our country. It is hoped that this paper will serve as a useful reference and even concepts provide solutions far current problems and future designs.

• Applied Microscopy
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• 제45권4호
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• pp.218-224
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• 2015

A technical overview on the various sample preparation methods for electron backscattered diffraction (EBSD) analysis is carried out. The mechanical polishing with colloidal silica finish, electro-chemical polishing, dual layer coating and ion beam milling are introduced for the common sample preparation methods for EBSD observation and some issues that are frequently neglected by the common EBSD users but should be considered to get a reliable EBSD data are discussed. This overview would be especially helpful to the people who know what EBSD technique is but do not get a reliable EBSD data because of difficulties in sample preparation.

• 항공우주기술
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• 제6권1호
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• pp.6-13
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• 2007

본 논문에서는 언제 어디서나(유비쿼터스) 빠르게 지정간 수송을 가능하게 해주며 현재 의 자동차를 대체할 수 있는 개인용 항공기, 즉 PAV(personal Air Vehicle)에 대하여 요구 조건을 살펴보고, 기존의 고속 회전익기 개념과 현재 진행 중인 고속회전익기 개발사업을 개괄적으로 검토하여, PAV 적용가능 플랫폼으로서 고속 회전익기 개념 및 기술적 이슈를 탐색하였다.

• 한국철도학회:학술대회논문집
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• 한국철도학회 2004년도 춘계학술대회 논문집
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• pp.262-268
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• 2004

In order to improve the speed of conventional Korean lines, the amendment of speed related regulations is required as the introduction of Korean tilting train. Therefore, an extensive review of UIC leaflets on speed was performed in the areas of tilting train, rolling stocks, operation, civil infrastructures, etc. The review was mainly achieved through the overview of parameters directly related with speed of railway. Moreover, a summary of UIC leaflets on speed and tilting train was provided for a better understanding of speed related UIC CODE. Through the technical overview of UIC CODE, necessary information on the amendment of current Korean speed regulations could be provided.

• 한국전자통신학회논문지
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• 제11권2호
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• pp.139-144
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• 2016

본 논문에서는 차량정밀측위를 위한 센서융합 기술의 최근 동향에 대해 다룬다. GNSS 만으로는 자율주행에서 요구하는 정밀측위의 정확도 및 신뢰도를 만족시킬 수 없다. 본 논문에서는 GNSS와 주행계, 자이로스코프 등의 관성항법 센서를 결합하는 복합측위 기술을 소개한다. 또한 라이다 및 스테레오 비전에서 탐지된 랜드마크를 정밀지도에 수록된 정보와 매칭시키는 측위 기법의 최근 동향을 소개한다.

• 제어로봇시스템학회논문지
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• 제20권3호
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• pp.261-269
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• 2014

This paper provides an overview of the basics and recent studies of Lyapunov-based nonlinear adaptive control, the aim of which is to improve or maintain the performance and stability of the closed-loop system by cancelling out the presumable uncertainties in the nonlinear system dynamics. The design principles are essentially based on Lyapunov's direct method. In this survey, we provide a comprehensive overview of Lyapunov-based nonlinear adaptive control techniques with simplified effective design examples, which are to be elaborated as related recent results are gradually shown. The scope of the survey contains research on singularity problems in adaptive control, the techniques to deal with linearly and nonlinearly parameterized uncertainties, robust neuro-adaptive control, and adaptive control methodologies combined with various nonlinear control techniques such as sliding-mode control, back-stepping, dynamic surface control, and optimal/$H_{\infty}$ control.

• 국제초고층학회논문집
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• 제2권2호
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• pp.141-152
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• 2013

This paper presents a brief overview of the recently developed performance-control method of moment frame design subjected to monotonously increasing lateral loading. The final product of any elastic-plastic analysis is a nonlinear loaddisplacement diagram associated with a progressive failure mechanism, which may or may not be as desirable as expected. Analytically derived failure mechanisms may include such undesirable features as soft story failure, partial failure modes, overcollapse, etc. The problem is compounded if any kind of performance control, e.g., drift optimization, material savings or integrity assessment is also involved. However, there is no reason why the process can not be reversed by first selecting a desirable collapse mechanism, then working backwards to select members that would lead to the desired outcome. This article provides an overview of the newly developed Performance control methodology of design for lateral resisting frameworks with a view towards integrity control and prevention of premature failure due to propagation of plasticity and progressive P-delta effects.

• Journal of the Korean Data and Information Science Society
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• 제25권5호
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• pp.1137-1149
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• 2014

Since the bifurcating autoregressive (BAR) model was developed by Cowan and Staudte (1986) to analyze cell lineage data, a lot of research has been directed to BAR and its generalizations. Based mainly on the author's works, this paper is concerned with a contemporary review on the BAR in terms of an overview and perspectives. Specifically, bifurcating structure is extended to multi-cast tree and to branching tree structure. The AR(1) time series model of Cowan and Staudte (1986) is generalized to tree structured random processes. Branching correlations between individuals sharing the same parent are introduced and discussed. Various methods for estimating parameters and related asymptotics are also reviewed. Consequently, the paper aims to give a contemporary overview on the BAR model, providing some perspectives to the future works in this area.

• Journal of Semiconductor Engineering
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• 제2권1호
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• pp.99-108
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• 2021

Successive Approximation Register (SAR) Analog-to-Digital Converters (ADC) seem to become the hottest ADC architecture during the past decade in implementing energy-efficient high performance ADCs. In this overview, we will review what kind of circuit techniques and architectural advances have contributed to place the SAR ADC architecture at its current position, beginning from a single SAR ADC and moving to various hybrid architectures. At the end of this overview, a recently reported compact and high-speed SAR-Flash ADC is introduced as one design example of SAR-based hybrid ADC architecture.

• 기술혁신학회지
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• 제1권2호
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• pp.153-164
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• 1998

This study attempts to provide policy makers and other interested parties with policy implications throughout an economic analysis of software sector. Chapter 2 is designed to provide an overview of market characteristics in the software sector. Chapter 3 reviews an overview of the evolution stage of the software industry and the effects these trends have on firm strategies. Chapter 4 reviews the relationships between software economic characteristics and intellectual property rights. Some suggestions are offered in the conclusion, with special attention given to an examination of market characteristics, firm strategies, government policies, and some economic factors.