• Journal of Electrical Engineering and Technology
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• 제13권6호
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• pp.2220-2226
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• 2018

Electric vehicles (EVs) are significant resources for demand response (DR). Thus, it is essential for EV aggregators to quantitatively evaluate their capability for DR. In this paper, a concept of dynamic equivalent battery (DEB) is proposed as a metric for evaluating the DR performance using EVs. The DEB is the available virtual battery for DR. The capacity of DEB is determined from stochastic calculation while satisfying the charging requirements of each EV, and it varies also with time. Further, a new indicator based on the DEB and time-varying electricity prices, named as value of DEB (VoDEB), is introduced to quantify the value of DEB coupled with the electricity prices. The effectiveness of the DEB and the VoDEB as metrics for the DR performance of EVs is verified with the simulations, where the difference of charging cost reduction between direct charging and optimized bidding methods is used to express the DR performance. The simulation results show that the proposed metrics accord well with the DR performance of an EV fleet. Thus, an EV aggregator may utilize the proposed concepts of DEB and VoDEB for designing an incentive scheme to EV users, who participate in a DR program.

• 대한수학교육학회지:학교수학
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• 제15권2호
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• pp.443-457
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• 2013

본 연구에서는 교사의 지식에 대한 초임교사들의 인식을 알아보기 위해 초임교사들에게 설문을 실시하고, 그 결과를 분석하였다. 초임교사들은 자신의 수업의 반성과 개선에 대한 지식을 가장 필요하다고 인식하고, 실제 수업에서는 수학적 개념과 학습 내용들 사이의 연계성과 위계성 등 상호 관계에 대한 지식을 가장 많이 활용한다고 인식한다. 이러한 교사의 지식은 주로 수업 경험과 교사 연수를 통해 형성된다고 인식한다. 또한, 초임교사들은 수학 수업에서 공학적 도구와 평가를 활용하는 지식에 대해 필요성을 낮게 인식하고 자주 활용하지 못하는 것으로 인식한다. 초임교사들이 교사의 지식을 형성하는데 도움을 주기 위해 교사 입문 프로그램과 멘토링의 활성화, 교원 양성기관의 교육과정의 개선, 다양한 교사 연수 프로그램의 개발과 보급 등이 필요하다.

• 한국실내디자인학회논문집
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• 제25권5호
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• pp.63-70
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• 2016

Modern society is suffering from the phenomena of low-fertile, ultra-aging, and low-growth. On this social flow, most social classes undergo vulnerable situation and their overall housing and living condition have difficulties. So far many housing guidelines for diverse population were developed, recently, inclusive 'Customized Housing Design Guideline for Childcare Families' in terms of maintaining family and society has been completed. The purpose of this study is to analyze User Benefit Characteristics of 'Customized Housing Design Guideline for Childcare Families'. The research subjects are essential 140 guidelines appropriate to children's development and parents' care. The research method is contents analysis and the analysis criterion are 4 concepts of the User Benefit Criteria- 'Behavioral Facilitation (BF)', 'Physiological Maintenance (PhM)', 'Perceptual Maintenance (PM)', 'Social Facilitation (SF)'. 3 people inter-raters reliability was established. Altogether, the guidelines were rated in the order of PhM>PM>BF>SF, and these characteristics are similar as common universal design guidelines. This showed the supportability of spatial characteristics in the guidelines related to user's special behaviors. Also, the results show the importance of outdoor space planning for safe social interactions. The supportable characteristics of 'Customized Housing Design Guideline for Childcare Families' could be expected to efficiently apply for new housing development in the future.

• 한국실내디자인학회논문집
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• 제25권5호
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• pp.3-15
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• 2016

Between various ideological experiences, such as spatial, artistic and religious experiences, a consistent and transcendental sense exists, which is difficult to systemize or establish, in all the senses human beings experience. It shows that the depth of essence may be much deeper than that of religion or science in limits of humans' thinking and experiences. On the premise that we need to rationally understand and systemize such a sublime experience, it is thought that we will be able to expand the system of our senses through a new approach breaking away from the previous concepts used to interpret a spatial experience. Rudolf Otto, a German philosopher and comparative religion scholar, explains such an essential sense through Numinose Theory. As his theoretical analysis and approach are used to explore the mechanism of such a transcendental emotion, which is impossible to express with such words as 'sanctity', 'sublimity' and 'reverence', from various perspectives, but intend to exclude dogmatic logic. Therefore, they seem to become new and useful tools in aesthetically understanding space design and objects of arts. Thus, this study aims to examine what value Numinose Theory has in the aspect of understanding space design, based on which this study intends to use the Numinose concept as a concept of interpreting 'Jongmyo Jeongjeon'.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제6권11호
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• pp.2880-2900
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• 2012

Robot programming often sparks students' interest in programming, but it is not easy for them to program both procedure and reactivity of robot movements that are essential requirements. In this study, we reviewed in detail a new programming language, State-Based Squeak. It allows novice students to implement both procedure and reactivity of robots easily. The effect of this new language on robot programming education was also examined using a group of 28 middle school students. According to the results of analyzing the students' understanding of programming, reading and programming abilities the group that used State-Based Squeak (the experimental group) showed a higher completion ratio than the other (control) group. The significance of this study is that a robot programming language has been developed that addresses the concepts of both procedure and reactivity in such a way that middle school students can more easily learn how to program robots, something that is often difficult to attempt even for professional programmers.

• 한국IT서비스학회지
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• 제11권3호
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• pp.39-48
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• 2012

It is essential that firm makes a rational and scientific decision making and creates a news value for the future direction. To do so, many firms attempt to collect meaningful data and find the filtered and refined implication for the better customer relationship and the active market drive through the various analytic tools. Among the possible IT solutions, utilization of 'Big Data' is becoming more attractive and necessary in such a way that it would help firms obtain the systemized and demanding information and facilitate their decision making process to keep up with the market needs. In this paper, it introduces the concepts and development of 'Big Data' recognized as a IT resource and solution under the rapidly changing firm environment. This study also presents the several firm cases using Big Data' and the Oracle's total data management and analytic solutions in order to support the application of 'Big Data'. Finally this paper provides a holistic viewpoint and realistic approach on use of 'Big Data' to create a new value.

• 시스템엔지니어링학술지
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• 제9권1호
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• pp.13-23
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• 2013

Operational Concept Descriptions or Document(OCD) shall be developed to understand stakeholder's desire for to-be-delivered system. But there is little study on methodology of OCD generation and many developers do not understand importance of OCD in Korea. According to Nicole Roberts' industry(18 U.S. companies and organizations) survey, only 30% of system development projects had OCD, too. Researchers and developers have opposing views regarding the generation of an OCD. Many researchers believe that the development and use of operational concepts at the start of large projects is essential. Alternatively, developers may view the OCD as a burden to the development process rather than an enabler due to the extensive documentation requirement. In this paper a couple of OCD guidelines were investigated to clarify how to build a CONOPS effectively and what to include. Finally, OCD for rotorcraft based Personal Air Vehicle System(PAVS) was developed as a case study. In the future, a template for generating OCD appropriate to Korean environment could be proposed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년 학술대회 논문집 정보 및 제어부문
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• pp.548-550
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• 2006

This paper deals with the implementation of a small humanoid robot controller on the basis of Real Time Operating System(RTOS) and the FPGA. This controller was adapted to the humanoid robot with 25 DOFs, which are 12 DOFs in each leg, 8 DOFs in each arm, 3 DOFs in waist, and 2 DOFs in head. The robot actuators were used DX-117 servo motors that have all of the controller components in one module in order to simplify the control structure. In addition, the main controller is FPGA of Virtex4-FX from Xilinx, and ported on VxWorks that is kind of RTOS. It is essential to install this RTOS on the complex control system and to do control activity at the multitasking environments. This paper suggested the method of distributing the computational load in the humanoid robot controller using the FPGA and RTOS concepts. All of the control process was verified through the real action of the humanoid.

• 터널과지하공간
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• 제24권2호
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• pp.120-130
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• 2014

최근 전 세계적으로 여러 건의 대규모 해저터널 건설 사업이 완료되었거나 진행 혹은 계획 중에 있다. 우리나라 역시 한중, 한일 해저터널에 대한 기본 구상이 이루어지고 있으며 동시에 국내 도서 지역을 연결하는 해저터널이 구상 단계에 있다. 국내 기술수준과 해저터널 건설이 갖는 파급효과를 고려할 때, 해저터널 관련 기술의 확보 및 개선이 요구되어진다. 이 논문은 사례연구를 통하여 해저터널이 갖는 특징과 국내외 해 하저터널 건설동향을 분석하였고 해저터널과 관련된 사고 발생 사례를 수집하여 이로부터 요구되는 관련기술에 대하여 정리하였다.

• 한국전자거래학회지
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• 제14권1호
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• pp.81-92
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• 2009

전자 상거래 도메인에서 온톨로지가 실용적으로 활용되기 위해서는 온톨로지를 잘 저장 관리하고 사용자가 기대하는 온톨로지 질의에 대한 응답 처리가 가능해야 한다. 다양한 장점과 신뢰성을 바탕으로 한 관계형 데이타베이스 기반의 상품 온톨로지의 저장이 현실적 실용 방안이라고 할 때, RDBMS에서 온톨로지 질의 처리가 가능하기 위해서는 상품 온톨로지의 개념과 개념들간의 관계에 대한 정보가 잘 처리될 수 있도록 저장되어야 한다. 이 논문에서는 관계형 데이타베이스 기반에서 확장성과 효율적인 상품 온톨로지의 의미적 관계에 대한 질의 처리를 위한 데이터베이스 설계 방법을 제안한다.