Autonomous ultradian metabolic oscillation of Saccharomyces cerevisiae KNU5377

Jaeyoul Choi,Il-sup Kim,Ingnyol Jin,Ho-Yong Sohn 한국생명과학회 2004 한국생명과학회 심포지움 Vol.41 No.-

달 궤도 유인기지 보급을 위한 물류 시스템의 임무 개념설계

고재열(Jaeyoul Ko),이주성(Juseong Lee),이은광(Eunkwang Lee),George Coulloupas,최석민(Sukmin choi),서종은(Jong-Eun Suh),안재명(Jaemyung Ahn) 한국항공우주학회 2017 한국항공우주학회 학술발표회 논문집 Vol.2017 No.4

밸런싱 시스템을 이용한 학습 어플리케이션

최승현(Seunghyun Choi),권수호(Sooho Kwon),김재열(Jaeyoul Kim),오경수(Kyungsu Oh) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1

본 논문에서는 밸런싱 시스템을 적용하여 사용자의 흥미를 높이고 학습 효율을 향상시키는 어플리케이션을 소개한다. 우리는 밸런싱 시스템을 적용하여 문제 나이도와 문제수를 조절하고, 틀린 문제는 습득할 때까지 반복적으로 출제한다. 사용자는 자신의 수준에 맞는 난이도의 문제와 문제수를 학습한다. 틀린 문제는 다음 학습에 반복적으로 학습한다. 우리는 사용자가 지속적인 학습 욕구를 느낄 수 있는 문제 수와 적정 난이도를 도출하기 위하여 영단어 학습 어플리케이션을 개발하고 사용자에게 테스트를 한 후 나온 결과를 토대로 학습 어플리케이션에 적용하였다. 밸런싱 시스템은 다양한 학습 어플리케이션이나 기능성 게임에 적용이 가능하다. 사용자는 자신의 능력에 따른 난이도의 문제를 학습하고 틀린 문제는 반복적으로 학습하면서 학습에 대한 흥미와 학습의 효율을 높일 수 있다. This paper introduces an application that uses the balancing system to enhance the users' interest and also could improve the users learning ability. We use the balancing system to control the number of problems, and the level of difficulty. The problems that get incorrect continue to appear on the application.The user can learn by the problems and the number of problems that are in the level fit for the user. The problems that get incorrect answers come out automatically in the next level so that the user can learn to get the right answer. In order to develop an English word learning application that could make the user feel the need to learn and both let the user learn in a level fit for the users English skill, we had to test users and we applied the results to the application. The balancing system could be applied in various learning applications or in serious games. The user can learn by the level that is right for their ability, and they could learn through the problems that they've gotten wrong. That way they can feel interest and enhance their learning ability.

Preference Evaluation System for Construction Products Using QFD-TOPSIS Logic by Considering Trade-Off Technical Characteristics

Cho, Jaeho,Chun, Jaeyoul,Kim, Inhan,Choi, Jungsik Hindawi Limited 2017 Mathematical problems in engineering Vol.2017 No.-

<P>This paper investigates the feasibility of quality function deployment, technique for the order of preference by similarity to ideal solution (QFD-TOPSIS) in presenting user preferences for multiple alternatives, such as construction technologies, products, systems, and design solutions, with trade-off technical characteristics (TC). The original QFD as house of quality (HOQ) defines the requirements and features as subjective matrix relations, which cause interpretations to vary across users and limit its industrial applications. QFD-TOPSIS is a new model that combines the benefits of QFD with those of TOPSIS, maintains the subjectivity and objectivity evaluation of the technical characteristics (TC), and rates the preferences by considering users’ individual propensity for requirements. In addition, QFD-TOPSIS rates the preferences through the reciprocal compensation effects of trade-off TC and filters unsuitable alternatives with predefined restrictive conditions. Trade-off refers to conflicts and/or contradictions between attributes, often arising in multicriteria decision-making. Users or project stakeholder groups define the priorities of trade-off TC that directly influence product preferences and decision-making. In the present study, we have developed a Web system based on the QFD-TOPSIS logic and tested its operation to verify its industrial applicability and viability for automatic quality evaluation.</P>

플랜트 시설물 시공단계의 4M기법을 활용한 전문가 인식조사에 의한 안전관리요인 분석

김규진,최병선,전재열,Kim, Kyujin,Choi, Byungsun,Chun, Jaeyoul 한국건설관리학회 2016 한국건설관리학회 논문집 Vol.17 No.1

본 연구는 플랜트 시공 현장의 안전성 확보를 위한 플랜트 시공단계의 주요 위험요인 분류 및 위험요인별 중요도 분석을 목적으로 수행되었다. 플랜트 산업은 지속적인 호황과 증가로 해외 플랜트 수주 실적이 2014년에는 전체 수주금액의 61% 증가한 실적을 보였듯이 플랜트 산업은 시공 단계의 위험요인, 안전관리 대상 인식 및 요인별 중요도 등으로 다양한 사고 예방 및 안전관리 개발과 도입이 필요한 실정이다. 이를 위해 플랜트 시공단계의 재해현황 자료 수집 및 국내 플랜트 시공관련 전문가를 대상으로 1차 조사 분석을 수행하여 플랜트 시공단계의 위험요인을 4M의 4가지 관리요인으로 분류하였다. 이후 AHP 기법을 적용하기 위해 국내 플랜트 시공 및 안전관련 전문가를 대상으로 2차 조사 분석을 수행하였다. 2차 분석결과를 바탕으로 위험요인별 중요도 및 순위를 분석하여 제시하였다. 본 연구는 플랜트 시공단계의 주요 위험요인을 사전에 파악하여 인식하고 이를 예방하기 위한 기초 자료로써 활용하고자 한다. The purpose of this study is to classify main risk factors on a construction phase of a plant project and analyze importance by the risk factors. Plant Industry is continuing boom and the increase in overseas plant orders in 2014 has showed a performance increase of 61% of the total orders, as the plant industry are risk factors for the construction phase, safety management target recognition and variety of accident prevention and safety factors by importance, etc. a situation that requires the development and introduction of management. So, it is performed that collected disaster conditions data on a construction phase of a plant project, is questioned by plant construction professional and is classified by 4M. Then, it is performed that is questioned by plant construction and safety professional in order to apply AHP method, and is presented from analyzing the risk factors, which are results of the survey, by importance and priority. This study will recognize from identifying the main risk factors in advance and will be utilized as a basic data is to prevent the risk factors.

Design Principle for Bright, Robust, and Color-Pure InP/ZnSe<i>_x</i>S_1-<i>x</i>/ZnS Heterostructures

Hahm, Donghyo,Chang, Jun Hyuk,Jeong, Byeong Guk,Park, Philip,Kim, Jaeyoul,Lee, Seongjae,Choi, Jongha,Kim, Whi Dong,Rhee, Seunghyun,Lim, Jaehoon,Lee, Doh C.,Lee, Changhee,Char, Kookheon,Bae, Wan Ki American Chemical Society 2019 Chemistry of materials Vol.31 No.9

<P>Advance in wet chemistry enables the sophisticated design of nanocrystal quantum dots (QDs) and allows unprecedented color purity and brightness, promising their useful applications in a variety of light-emitting applications. A representative example is core/shell heterostructures, in which charge carriers are effectively decoupled from structural artifacts to generate photons efficiently. Despite the development of widely accepted synthetic protocols for Cd- or Pb-based QDs, the progress in heterostructuring environmentally benign QDs has been lagging behind, and so is the practical use of these QDs. Herein, we present a design principle for InP/ZnSe<I><SUB>x</SUB></I>S<SUB>1-<I>x</I></SUB> heterostructured QDs. A principal design approach is the growth of uniformly thick inorganic shell consisting of a ZnSe<I><SUB>x</SUB></I>S<SUB>1-<I>x</I></SUB> inner shell and a ZnS outermost shell that effectively confines electrons from spreading inward of QDs. Comprehensive studies across synthesis, spectroscopic analysis, and calculation uncover that the presence of Se near the InP emissive core enables a uniform shell growth to an extended thickness and the S-rich exterior shell ensures the decoupling of the electron wave function from the surface trap states. Engineering composition profile across multiple shells enables us to realize InP/thick-shell QDs meeting the requirements of light-emitting applications such as high photoluminescence quantum yield, narrow spectral bandwidth, and enhanced photochemical robustness. We capitalize on bright, robust, and color-pure InP/ZnSe<I><SUB>x</SUB></I>S<SUB>1-<I>x</I></SUB>/ZnS QDs with a range of emission wavelength covering from cyan to red regions by exemplifying their use in the primary-color light-emitting diodes (peak external quantum efficiency of 3.78 and 3.92% for green- and red-emitting ones, respectively).</P> [FIG OMISSION]</BR>

설계 커뮤니케이션 인식조사 및 QFD를 이용한 설계 커뮤니케이션 방안

배유정,권원,조재호,최병선,전재열,Bae, Yujung,Kwon, Won,Cho, Jaeho,Choi, Byungsun,Chun, Jaeyoul 한국건설관리학회 2017 한국건설관리학회 논문집 Vol.18 No.5

최종 설계 결과물의 완성도와 발주자 요구에 적합한 설계 품질을 확보하기 위해서 프로젝트 참여자간 요구사항의 공유와 원활한 커뮤니케이션 과정이 필요하다. 하지만 기존의 문서기반, 도면기반 협력 방식은 복잡한 설계도서의 효과적 이해가 어렵고, 해당 분야의 충분한 기술적 경험이 중요하다. 참여자간 커뮤니케이션의 비효과적, 비효율적인 전달과 이해는 기능의 간섭 및 충돌의 가능성을 높이고 사업 수행의 물질적, 시간적 손실을 초래한다. 따라서 본 연구는 국내 건축설계업무에서의 참여자간 커뮤니케이션 현황과 인식을 조사하고 개선 방향을 제안하고자한다. 설문조사 내용을 기반으로 커뮤니케이션 증진요건을 분석하고 QFD 도구를 이용하여 기술적 요구사항을 프로젝트 참여자간 공유하고 수정하고 피드백 할 수 있는 커뮤니케이션 방안을 제시한다. QFD는 통합적인 설계검토가 가능하여 기능 간섭 및 충돌과 같은 예상 문제점을 발견하고 공유할 수 있다. 본 연구는 QFD를 이용한 커뮤니케이션 도구를 통해 적합한 의사결정을 지원하며 결과적으로 사용자 만족도 향상을 목적으로 한다. The efficient communication process is essential to guarantee the completeness of design and secure the quality to meet the contractor's needs. However, using the existing communication methods based on the design and documents, it is difficult to effectively understand the drawings and specifications that are very complicated, and sufficient technical experiences would be required. Ineffective and inefficient communication among users, designers and project participants during the design process would raise the possibility of functional interferences of the object, induce conflicts, cause a design change, and accordingly incur losses of the project in terms of cost and time. The purpose of this study is to suggest improvement direction of communication in accordance with the requirements, by investigating the present state and the project participants' understanding of design communication. And also, it presents the application model of QFD that the project participants could share and define, and feedback the requirements as well as conducting analysis of improvement factors based on the survey.