• 경영과학
• /
• 제33권1호
• /
• pp.35-47
• /
• 2016

Generation of electricity using wind power has received considerable attention worldwide in recent years mainly due to its minimal environmental impact. However, volatility of wind power production causes additional problems to provide reliable electricity to an electrical grid regarding power system operations, power system planning, and wind farm operations. Those problems require appropriate stochastic models for the electricity generation output of wind power. In this study, we review previous literatures for developing the stochastic model for the wind power generation, and propose a systematic procedure for developing a stochastic model. This procedure shows a way to build an ARIMA model of volatile wind power generation using historical data, and we suggest some important considerations. In addition, we apply this procedure into a case study for a wind farm in the Republic of Korea, Shinan wind farm, and shows that our proposed model is helpful for capturing the volatility of wind power generation.

• 한국컴퓨터정보학회논문지
• /
• 제21권11호
• /
• pp.159-166
• /
• 2016

Compiler course is one of the important courses in computer science. It requires more efficient learning environment because of its large coverage scale and complexity. One of its solutions is to provide the integrated development environment for educational compilers which is enable to give practice-oriented class and enhance student's interest. This paper presents the code generation support system developed in an integrated development environment of educational compiler. Our system helps students to understand the process of code generation and visualizes the relation among the source language, AST, and the target language. It makes students develop their own compilers more easily.

• 대한가정학회지
• /
• 제40권2호
• /
• pp.143-159
• /
• 2002

Consumer Education Policy for -Focusing on developing Social support System- The purpose of this research is to understand the change of future consuming environment and the characteristics of future potential consumer: the net generations. With those research results, we deduced our goal, content and method of consumer education for these net generations. Finally, I suggested a scheme of the social construction by demand of our future society. Literature review and depth interview are used for this research. The main factors of the change of our future consuming environment are Digitalization, globalization, improvement of consumer sovereignty, Sustainable consumption culture, the increasing pursuit of safe life. It is necessary to educate our future consumer, net generations, the information searching skills in order to be able to obtain right information. We also need to educate them how to practice the safe life and Sustainable consumption and how to get consumers sovereignty. The method of the education requires interchangeable communication. We need social networking system for the support of consumer education, in order to build this social system. We need an administrative support from the government and financial support from corporations. We have suggested that it is very desirable to share all the information developed among Academic field, Consumer related organizations and schools by this network be build.

• 한국정보과학회:학술대회논문집
• /
• 한국정보과학회 2003년도 가을 학술발표논문집 Vol.30 No.2 (1)
• /
• pp.196-198
• /
• 2003

Virtually every digital signal processors(DSPs) support on-chip multi- memory banks that allow the processor to access multiple words of data from memory in a single instruction cycle. Also, all existing fixed-point DSPs have irregular architecture of heterogeneous register which contains multiple register files that are distributed and dedicated to different sets of instructions. Although there have been several studies conducted to efficiently assign data to multi-memory banks, most of them assumed processors with relatively simple, homogeneous general-purpose resisters. Therefore, several vendor-provided compilers fer DSPs were unable to efficiently assign data to multiple data memory banks. thereby often failing to generate highly optimized code fer their machines. This paper presents an algorithm that helps the compiler to efficiently assign data to multi- memory banks. Our algorithm differs from previous work in that it assigns variables to memory banks in separate, decoupled code generation phases, instead of a single, tightly-coupled phase. The experimental results have revealed that our decoupled algorithm greatly simplifies our code generation process; thus our compiler runs extremely fast, yet generates target code that is comparable In quality to the code generated by a coupled approach

• 조명전기설비학회논문지
• /
• 제27권2호
• /
• pp.45-53
• /
• 2013

In this paper, we analyze the typical phase voltage and line current waveform characteristics of the distribution system with 3 phase small synchronous generation source in case with load and non-load group, in order to investigate the power quality for end load connected of generation source. As demonstrated by our experimental results, the distortion and power quality of phase voltage and line current waveform were relatively good for low voltage 3 phase model grids connected of 3 phase small synchronous generation source in case with non-load group. However, distortion and power quality of voltage and current waveform was poor for low voltage 3 phase model grids connected to 3 phase small synchronous generation source in the load group with some phase voltage and frequency difference. From the above results, we conclude that the phase voltage and frequency of 3 phase generation source must be identical to that of distribution system source to maximize the power quality. Also, special attention is required in case of having load group or non-load group to 3 phase generation source.

• 한국지능시스템학회논문지
• /
• 제19권1호
• /
• pp.62-68
• /
• 2009

수정된 PCX(parent-centric recombination) 연산자와 결합한 두 가지 새로운 세대차 모델이 제안된다. 첫째, 자가적응 세대차 모델(SGG, self-adaptation generation gap)은 자손에 의한 부모의 대치 확률을 일정한 수준으로 유지하는 제어 방식이다. 둘째, 가상 클러스터 세대차(VCGG, virtual cluster generation gap)는 클러스터링을 통해 부모간의 거리를 조정해 주며, 이로 인해 개체들이 다양화 될 수 있다. 이 모델에서 부모간의 거리는 클러스터의 크기로 조절된다. 제안된 두 가지 접근법의 효용성을 입증하기 위해서 3 가지 표준적인 문제에 대한 실험이 수행되었다. 가장 최근의 경쟁력 있는 접근법인 CMA-ES와 G3-PCX와 비교한 결과, 제안된 두 기법 모두 기존의 접근법들 보다 우수함을 보여준다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
• /
• 제10권1호
• /
• pp.114-124
• /
• 2004

본 논문에서는 DirectShow 프로그래밍의 주요 개발 도구인 그래프 에디터에서 작성된 필터 연결 그래프로부터 C 소스 코드를 자동 생성하는 시스템에 대한 설명한다. 기존의 DirectShow 프로그래밍 환경에서는 그래프 에디터를 이용한 프로그램 설계 및 실행 확인 작업과 실제 프로그램 코드를 작성하는 프로그램 개발 작업이 별도로 이루어진다. 이에 반해, 본 시스템을 사용할 경우, 멀티미디어 응용 프로그램 개발자는 소스 코드를 직접 일일이 수정할 필요 없이, 그래프 에디터를 이용하여 필터 삽입 및 필터 연결을 통한 프로그램 설계 작업을 수행한 다음, GRF 파일로 저장하기만 하면, 원하는 C 소스 프로그램을 자동적으로 얻을 수 있기 때문에 보다 효과적이고 훨씬 신속한 DirectShow 프로그래밍이 가능하다. 더욱이 본 시스템은, 고정된 개수의 매우 제한된 미디어 제어 기능만을 소스 코드에 추가할 수 있는 기존의 시스템과는 달리, 시스템 사용자인 프로그램 개발자로 하여금 자신이 개발하고자 하는 응용 프로그램에 추가할 미디어 제어 기능을 보다 쉽고 다양하게 선택할 수 있도록 지원하기 때문에 보다 실용적인 도구로 활용될 수 있다.

• 한국콘텐츠학회논문지
• /
• 제18권12호
• /
• pp.108-117
• /
• 2018

샤오취안은 정체되어 있던 중국의 다큐멘터리적 초상사진의 새로운 극복으로 평가되고 있다. 획일화되어 있던 집단적 접근 방식을 벗어나 사진가의 독창성에 기반한 개별적 접근방식의 형태를 제시했다. 특히, 샤오취안은 <우리들 세대>를 통해 중국의 개혁개방 이후 1980-90년대 문화, 예술 발전에 큰 역할을 한 인물들이 살아온 시대에 대한 자신의 감정과 해석을 일정한 사진적 형식을 통해 표현하고자 했다. 샤오취안은 촬영 대상과의 소통을 기반으로 인물의 진정한 내면적 모습을 파악하고 이에 영향을 끼친 시대적 배경 및 사상을 구현했다. 그는 촬영 대상의 복장과 생활환경을 활용해 그 시대의 문화, 예술적 흐름을 반영하고자 했다. 구도적으로도 화면 구조의 변화를 활용해 촬영 대상과 배경의 상징적 결합을 시도했다. 또한 인물의 표정을 통해 표현되는 감정을 시각적으로 구현해 사회상을 표현했다. 본 연구는 중국 초상사진의 다큐멘터리적 표현방식을 제시할 뿐만 아니라 역사적 기록으로써의 초상사진의 가치를 제고하는 기회를 제공한다.

• Journal of Radiation Protection and Research
• /
• 제46권3호
• /
• pp.143-150
• /
• 2021

Since its establishment in 2018, the Young Generation Network (YGN) has been dedicated, with support of the International Radiation Protection Association (IRPA), to a variety of activities to promote communication, collaboration and professional development of students and young professionals in the area of radiation protection and its allied fields. This article reports our recent activities from the middle of 2018 to the beginning of 2021, with highlights on some important events: "Joint JHPS-SRP-KARP Workshop of Young Generation Network" (December 2019 in Japan); contribution to "Nuclear Energy Agency Workshop on Optimization: Rethinking the Art of Reasonable" (January 2020 in Portugal); survey on the impact of coronavirus disease 2019 (COVID-19) on radiation protection among IRPA YGN members (March 2020); and contribution to IRPA15 (15^th International Congress of the IRPA; January-February 2021, online). The discussion and insight obtained from each activity are also summarized. The IRPA YGN will aim to achieve its on-going activities and continue to follow the ways paved in the Strategic Agenda and despite the challenges raised by the COVID-19 pandemic. Namely, running an international survey (for example, on the usage of social media in radiation protection, and on the long-term consequences of the COVID-19 pandemic), engaging national YGNs, extending the network, finding new relationships with networks with an interest in the young generation and participation in (remote) events will be aspired for.

• 대한전기학회:학술대회논문집
• /
• 대한전기학회 2002년도 하계학술대회 논문집 B
• /
• pp.1223-1225
• /
• 2002

This paper has described in Electric Vehicle Battery Management System(EV BMS). EV BMS manages the input/output energy of the traction battery, and provides the optimum environment condition during charging/ driving through the communication with other controllers. In this paper, we introduce our BMS for Santa Fe EV. Hyundai Motor Company has been developed EV since 1990. Recently, Santa Fe EV has been demonstrating with the environmental friendly technology. Two year real road testing program with electric powered Santa Fe is being undertaken by HMC in Hawaii.