• 한국연소학회지
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• 제18권4호
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• pp.1-11
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• 2013

The oxy-fuel combustion is $CO_2$ capture technology that uses mixture of pure $O_2$ and recirculated exhaust as oxidizer. Currently some Oxy-fuel power plants demonstration project is underway in worldwide. Meanwhile research project for converting 125 MWe Young-Dong power plant to 100 MWe oxy-fuel power plants is progress. In this paper, 1 D process analytical approach was applied for conducting process design and operating parameters sensitivity analysis for oxy-fuel combustion of Young-Dong power plant. As a result, appropriate gas recirculation rates was 74.3% that in order to maintain normal rating superheater, reheater steam temperature and boiler heat transfer patterns. And boiler efficiency 85.0%, CPU inlet $CO_2$ mole concentration 71.34% was predicted for retrofitted boiler. The oxygen concentration in the secondary recycle gas is predicted as 27.1%. Meanwhile the oxygen concentration 22.4% and moisture concentration 5.3% predicted for primary recycle gas. As the primary and secondary gas recirculation increases, then heat absorption of the reheater is tends to increases whereas superheater side is decreased, and also the efficiency is tends to decrease, according to results of sensitivity analysis for operating parameters. In addition, the ambient air ingression have a tendency to lead to decline of efficiency for boiler as well as decline of $CO_2$ purity of CPU inlet.

• 한국과학교육학회지
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• 제16권2호
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• pp.146-153
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• 1996

The study reported here is a part of the Korean Science Education Database (SEDB) project, a long-term effort to improve science education by providing educational information to science educators. The purpose of the SEDB project is to improve access to science resources available to teachers, students, parents, and others. Three educational database have been investigated and discussed in depth. The Educational Resources Information Center (ERIC) that is the largest education database in the world and the Eisenhower National Clearinghouse for Mathematics and Science Education (ENC) that is creating an easy-to-use catalog of mathematics and science curriculum materials have been investigated on the aspect of system and operation. The pilot form of the SEDB developed in this study has committed itself to reaching audiences that include practitioners and policymakers. The SEDB should be a collection of the most up-to-date and comprehensive listing of science curriculum materials in the nation, because educators need better access to the best instructional materials and programs to continually improve science education our nation's science. The researchers recommend the practical tips for developing an effective science education database.

• 한국공간구조학회논문집
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• 제6권3호
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• pp.51-57
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• 2006

본 연구의 목적은 한국건축프로젝트의 경영적 특성을 파악하는데 있다. 본문은 건축프로젝트의 주요 세 요소인 디자인, 건설, 유지관리의 프로세스 질 관리에 영향을 미치는 요소들을 조사한다. 설문조사는 건축관련 대학원생 및 교수, 설계자, 시공자들의 건축프로젝트에 있어서 프로세스 질 관리에 대한 상이한 시각을 보여주고 있다. 이러한 요소들을 분석함으로써 현재 국내의 질 관리 시스템과 프로그램 내용을 교정하고 개선하는데 도움이 될 것이다. 프로세스 질 관리에 있어서 여러 요소 중 설계자와의 협조가 가장 주요 요소로써 부각되었다.

• 교육시설 논문지
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• 제25권3호
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• pp.13-24
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• 2018

Unlike other educational spaces in school facilities, restrooms have remained unpleasant spaces without reflecting the change in social awareness and students' lifestyle. In the process of the 'School Restroom Environment Remodeling Project in Seoul' by means of "user participatory design method", this study aimed to suggest a design of the school restroom environment responding to the different needs of actual users, who are students and school staffs. By surveying them, it was revealed that they have a variety of respective behavioral patterns and spatial needs according to their status, gender, age and working period. Implications of this study are as follows; First, it is necessary to establish a separate restroom facility standards that respond to the characteristics of elementary school students. Second, there should be an expansive approach to widely accommodate with the users' needs that were found out through 'user participation', more than just repairing pre-existing space. Third, it needs to have critical review of the maintenance and operation system itself as well as the improvement of the school restroom environment.

• East Asian mathematical journal
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• 제34권2호
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• pp.103-125
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• 2018

This study was conducted as a part of the project to evaluate the quality of mathematics instruction in the national curriculum system. The purpose of this study is to measure the consistency between teaching goals of mathematics curriculum, contents presentation of textbooks, and testing including adequacy of each element in mathematics instruction for 8th grade. To do this, we used MIQP (instructional quality profile for Mathematics) developed basing on the instructional quality profile (IQP) in the previous research of the project. First, the quality of textbooks' content presentation for 8th grade was found that the desirable levels in number and operation area and geometric area was relatively less compared to other areas, but it was generally good. Second, it was found that the quality of mathematics testing for 8th grade was good in terms of consistency with the curriculum's teaching goals, consistency with the content presentation of textbooks, and adequacy of testing. However, regional differences in the quality of testing showed that there were some deficiencies in regions outside the metropolitan.

• 한국국방경영분석학회지
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• 제32권1호
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• pp.159-175
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• 2006

본 연구에서는 우리나라 차세대 전자정부 추진 목표로 완전 통합 단계의 달성을 상정하고, 그 방안으로 국가정보기술원의 역할모형을 제시하였다. 국가정보기술원은 정부가 추진하는 모든 정보화사업이 일관성 있고, 효율적으로 진행될 수 있도록, 국가정보화에 필요한 전반적인 기능들을 섭렵하여 지원하는 전담기관으로, 정보화기획, 정보화사업관리, 정보자원 운영, 국가표준관리, 감리 및 평가 등의 기능을 수행한다. 본 연구에서 제시된 국가정보기술원의 역할 모형은 정부의 정보자원 관리운용체계를 혁신하고, 유지하는데 필요한 기능을 충분히 수행할 수 있을 것으로 기대된다.

• 한국철도학회논문집
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• 제15권3호
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• pp.278-285
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• 2012

경전철 민자사업에서는 서비스 품질에 대한 핵심성과지표(KPI)로서 승객관점에서의 서비스가용도가 사용된다. 그러나 국내 경험이 부족한 서비스가용도는 목표 값 설정 시 많은 논쟁이 발생되어 왔다. 서비스가용도 목표값은 시스템 사양서 및 운전운영계획에 반영하기 위하여 프로젝트 초기단계에 설정되어야 한다. 따라서 본 논문에서는 경전철 프로젝트 초기단계에서 합리적으로 달성 가능한 서비스가용도 목표 값을 설정하기 위하여 서비스가용도를 정량적으로 예측할 수 있는 예측모델을 개발하였다. 또한 서비스가용도 목표 값 설정 시 가장 많이 비교되는 열차 정시성을 이론적으로 모델링하여 서비스 가용도와 열차정시성과의 관계와 차이점을 분석하였다.

• 한국항해항만학회지
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• 제47권2호
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• pp.57-65
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• 2023

In 2017, the International Maritime Organization (IMO) adopted MSC.428 (98), which recommends establishing a cyber-risk management system in Ship Safety Management Systems (SMSs) from January 2021. The 27th International Association of Marine Aids to Navigation and Lighthouse Authorities (IALA) also discussed prioritizing cyber-security (cyber-risk management) in developing systems to support Maritime Autonomous Surface Ship (MASS) operations (IALA guideline on developments in maritime autonomous surface ships). In response to these international discussions, Korea initiated the Korea Autonomous Surface Ship technology development project (KASS project) in 2020. Korea has been carrying out detailed tasks for cybersecurity technology development since 2021. This paper outlines the basic concept of ship network security equipment for supporting MASS ship operation in detailed task of cybersecurity technology development and defines ship network security equipment interface for MASS ship applications.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2164-2168
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• 2003

Real time control system such as in factory automation fields, defense field, aerospace, railway industries, financial trading and so forth, includes multiple computers on multiple nodes, and share data to process various actions and functions. This is similar to multitasking in a multiprocessor computer system. The task processing efficiency of such system is proportionally increased by process speed of each process computer. And also it is greatly influenced by communication latencies of each node. To provide proper operation of such real time system, a network that can guarantee deterministic exchange of certain amount of data within a limited time is required. Such network is called as a real time network. As for modern distributed control system, the timeliness of data exchange gives important factor for the dynamics of entire control system. In a real time network system, exchanged data are determined by off-line design process to provide the timeliness of data. In other word, designer of network makes up a network data table that describes the specification of data exchanged between control equipments. And by this off-line design result, the network data are exchanged by predetermined schedule. First, this paper explains international standard real time network TCN (Train Communication Network) applied to the KHST (Korean High Speed Train) project. And then it explains the computer program developed for design tool of network data table of TCN.

• 한국지반공학회:학술대회논문집
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• 한국지반공학회 2005년도 춘계 학술발표회 논문집
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• pp.1596-1601
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• 2005

Recently, the probable maximum precipitation (PMP) of dam sites has been greatly increased, compared to that in design, due to a rise in precipitation by abnormal weather, which led to an increase in National interest for dam safety. Therefore, the purpose of this study is to develop a management system of dam safety. The main contents of the first stage($'03{\sim}'04$) of the project consisted of determining the object of management system of dam safety through researched present situation of dam safety management in domestic and reviewing operation for management system of dam safety in abroad. In the second stage($'05{\sim}'06$), the study pursues constructing a basis process of synthetic safety management system through dam safety program and developing a system that can judge dam safety with an improve in reliability of measurement data.