• 대한전기학회:학술대회논문집
• /
• 대한전기학회 1995년도 하계학술대회 논문집 B
• /
• pp.543-545
• /
• 1995

The purpose of this paper is to determine the proper reliability criteria used in generation expansion planning of electric utilities. In this paper, we tried to combine long-term generation expansion planning and short-term weekly maintenance scheduling program package. We set two scenarios in which the O&M technology of power plants will be improved or not in the future. We performed LOLP sensitivity analysis for each scenario to determine the optimum reliability criteria in the power system operation aspects.

• 한국정보통신학회논문지
• /
• 제16권10호
• /
• pp.2150-2162
• /
• 2012

차세대 모바일 인터넷의 진화에 따라 2G, 3G, 4G, B4G 이동통신 무선접속네트워크가 공존하게 되며, 기존의 통신 서비스 제공자들은 통합 서비스 제공자로 융합되고, 다수의 가상 서비스 제공자들이 발생하게 될 것으로 예상된다. 이러한 복잡한 미래의 융합 서비스를 제공하기 위해서 미래 인터넷에서는 무선 액세스 네트워크가 융합되고 다양한 서비스 제공자들에 의해 공유되는 무선 네트워크 가상화가 필수적이다. 따라서 본 논문에서는 미래 무선 액세스 네트워크 상에서 여러 서비스 제공자들의 다양한 무선 액세스 기술들이 유연하게 통합 운영될 수 있는 무선 액세스 네트워크 가상화를 위한 망 구조와 가상화 시나리오에 대해서 고찰한다. 본 논문에서 도출된 차세대 이동통신 네트워크를 위한 무선 액세스 망 구조 및 가상화 시나리오는 앞으로 무선 액세스 네트워크 가상화 알고리즘 개발을 위한 기틀 역할을 할 수 있을 것으로 기대된다.

• 한국정보과학회논문지:소프트웨어및응용
• /
• 제34권5호
• /
• pp.465-475
• /
• 2007

인터넷 이용의 확산과 함께 많은 사용자들이 자신의 일상을 글이나 사진, 만화와 같은 형태로 표현하여 과거의 기억을 반추하거나, 다른 사람과 공유하는 데 사용한다. 본 논문에서는 사용자의 일상 행동과 감정이 표현된 특이성 목록을 활용하여 다양한 만화를 생성함으로써 사용자의 기억이 쉽게 회상되고 공유될 수 있도록 하였다. 우선 각 특이성 별로 정의된 우선순위와 연관성을 바탕으로 중요 특이성을 선택하여 만화 시나리오를 구성하고, 생성된 시나리오를 스토리 온톨로지를 통해 보정한다. 다음 보정된 시나리오의 각 특이성과 만화 이미지 사이의 유사도를 계산하여, 각 특이성에 어울리는 만화 컷이 조합된다. 마지막으로 다양한 만화 생성을 위해 날씨, 야경, 과장, 애니메이션과 같은 효과들을 적용하였다. 생성된 만화의 다양성을 측정하기 위해 사용 시나리오와 사용성 평가를 통해 제안하는 방법을 평가하였다.

• 한국시뮬레이션학회논문지
• /
• 제22권3호
• /
• pp.15-23
• /
• 2013

공학설계분야에서 시뮬레이션 모델을 이용한 실험은 매우 중요한 역할을 한다. 그러나 최적의 설계 파라미터를 구하기 위한 시뮬레이션 실험은 많은 실행시간과 자원의 소요를 필요로 한다. 이를 극복하는 방안으로 입력 변수와 성능척도 간의 관계를 표현한 메타모형이 효과적으로 이용된다. 메타모형을 수립하기 위해서는 샘플 시나리오들을 입력으로 하는 시뮬레이션 실행이 요구된다. 이때 샘플 시나리의 수와 질이 메타 모형을 수립하는데 걸리는 시간과 메타모형의 정확성을 결정한다. 공간채움 특성은 샘플 시나리오들의 질을 결정하는 중요한 조건이 된다. 이 논문은 maxmin, Audze-Eglais, centered L2-discrepancy의 3가지 공간채움 척도에 기초한 샘플 시나리오 생성 방법을 제안하고, 실험을 통해 이들 생성방법에 대한 성능을 분석한 결과를 논의한다.

• 한국해양공학회지
• /
• 제33권4호
• /
• pp.364-376
• /
• 2019

When underwater blasting is conducted, both shock waves and water waves have an effect on adjacent coastal areas. In this study, an empirical formula for estimating the details of water waves caused by underwater blasting was applied to a non-reflected wave generation system, and a 3D numerical wave tank (NWT) was improved to reproduce the generation and propagation of such water waves. The maximum elevations of the propagated water waves were comparatively analyzed to determine the validity and effectiveness of the NWT. Good agreement was demonstrated between the empirical and simulation results. The generation and propagation of water waves were also simulated under each underwater blasting scenario for the removal of the Todo islet at the Busan Newport International Terminal (PNIT). It was determined that the water waves generated by the underwater blasting scenario examined in this study did not have a significant impact on the PNIT. In addition, multiple-charge blasting caused higher wave heights than single-charge blasting. As the amount of firing charge increased, the wave height also increased. Finally, larger water waves were generated during the later blasting conducted at a deeper depth as compared with an earlier blasting conducted at a relatively shallow depth.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2007년도 Proceedings of ISRS 2007
• /
• pp.544-547
• /
• 2007

Because data processing systems in recent years are more complicated, main function of the data processing is divided as several sub-functions which are implemented and verified in each subsystem of the data processing system. For the verification of data processing system, many interface tests among subsystems are required and also a lot of simulation systems are demanded. This paper proposes CTHS (Common Test Harness System) for satellite ground segment development which has all of functions for interface test of the data processing system in one PC. Main functions of the CTHS software are data interface, system log generation, and system information display. For the interface test of the data processing system, all of actions of the CTHS are executed by a pre-defined operation scenario which is written by purpose of the data processing system test.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2006년도 춘계학술대회 논문집
• /
• pp.275-276
• /
• 2006

An intelligent arm-wrestling system is recently developed in our laboratory that is comprised of an arm-force generation mechanism and a control system that detects the maximum arm-force of a user in the early stage of the match, generates a different game scenario each time, and executes force feedback control to implement the scenario. This paper presents the mathematical model of the force control system of the intelligent arm-wrestling system, and some improvements of it via experimental frequency responses using a control signal analyzer.

• Nuclear Engineering and Technology
• /
• 제43권4호
• /
• pp.383-390
• /
• 2011

Nuclear power has become an essential part of electricity generation to meet the continuous growth of electricity demand. A Sodium-cooled Fast Reactor (SFR) was developed to extend uranium resource utilization under a growing nuclear energy scenario while concomitantly providing a nuclear waste management solution. Key questions in this scenario are when to introduce SFRs and how many reactors should be introduced. In this study, a methodology using Linear Programming is employed in order to quantify an optimized growth pattern of a nuclear energy system comprising light water reactors and SFRs. The optimization involves tradeoffs between SFR capital cost premiums and the total system U3O8 price premiums. Optimum nuclear growth patterns for several scenarios are presented, as well as sensitivity analyses of important input parameters.

• 대한가정학회지
• /
• 제40권10호
• /
• pp.217-230
• /
• 2002

This article explored the perceptions of ‘family’and the factors related to respondents' definitions of a family. The data were collected from two types of people: one was 472 university students and high school students' parents who were asked whether or not each of 22 scenarios represented a‘family’, and the other was 40 young and middle-aged adults who were asked,“what is a family member?”. Results showed that (1) the overwhelming majority of respondents considered a married couple without a child(scenario #5) as a family and the least respondents agreed a divorced couple(scenario #18) as a family, (2) the majority perceived consanguinity, co-residence, parental status, and marital status to be important in the definition of a family, (3) middle-aged adults were more likely than young generation to agree that consanguinity and paternal relations were important in determining what a family member is.

• Asia pacific journal of information systems
• /
• 제9권1호
• /
• pp.115-142
• /
• 1999

Legacy applications are valuable assets that should be integrated into next generation business systems. To gain this advantage, progressive companies can reverse engineer the legacy business operations. This paper presents a form-driven object-oriented reverse engineering(FORE) methodology by the use of business forms to recover semantics of legacy applications. They retain the user-oriented contents of business and thus are easily understandable. Our form driven object-oriented reverse engineering methodology consists of five phases: form and usage analysis, form object slicing, object structure modeling, scenario design, and model integration. Knowledge about form structure and user interaction with legacy applications is used to capture the design semantics. An object model, which consists of an object structure model and scenario results from such form knowledge. The resulting object model is more likely to help reverse engineers understand and reuse legacy systems.