• The Magazine of the Society of Air-Conditioning and Refrigerating Engineers of Korea
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• v.29 no.7
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• pp.60-67
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• 2000

현재까지 많은 공조용 빙축열 시스템이 전력수요 평준화를 목적으로 개발되어 설비에 적용되어 왔다. 지금까지 각종 학회에서 발표된 내용들은 기업에서 개발된 빙축열 시스템의 제빙 방식의 특징이나 시운전 결과가 중심이고, 빙축열 시스템의 평가, 특히 실제 설비의 운전 데이터에 기초한 시스템 성능 평가에 대한 내용은 많지 않았다. 이번에 소개하고자 하는 기술은 현장 제조형의 과냉각 방식 빙축열시스템의 실제 설비를 대상으로 제빙조의 제빙성능과 해빙성능에 관하여 모델해석를 기초로 평가하고, 제빙효율, 소비전력, 운전비용과 관련하여 설명함으로서 열원시스템을 평가하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10b
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• pp.451-453
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• 1998

정보화 사회에 접어들면서 컴퓨터는 관련 분야의 전문가들 뿐만 아니라 일반 사용자 즉, 엔드유저에게도 친숙한 존재가 되었으며 앤드유저가 쉽게 활용할 수 있는 소프트웨어 제품의 개발이 증가하고 있다. 그러나 지금까지 엔드유저 지향의 소프트웨어에 대한 품질평가는 미흡한 시정이며 주로 기능에 대한 평가를 중시하였다. 엔드유저 지향의 소프트웨어의 경우 전문가를 대상을 하지 않는 만큼 사용용이성에 대한 평가도 매우 중요하므로 본 연구에서는 사용용이성에 대한 평가척도를 작성하고 이에 대한 적용결과를 기술 하였다.

• Proceedings of the Korean Society for Information Management Conference
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• 1995.08a
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• pp.153-156
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• 1995

본 연구는 조선후기문헌의 대부분을 점유하고 있는 당쟁관계문헌의 1차적인 평가기준을 제시하여 한국학 분야의 주제전문사서에게 조선후기자료에 대한 평가와 이용지도에 도움이 될 수 있게 함이 목적이다. 역사적 사건별로 동일사건에 대해, 연구대상으로 선정한 문헌의 서술태도와 관점을 분석한 결과, 각 문헌이 저자의 소속당파에 따라 편파적으로 기술됐음을 확인하였다. 그러므로 조선후기의 당쟁관계문헌은 도서의 일반적인 평가기준에 선행해 저자의 당파적성향고찰을 1차적인 평가기준으로 삼아야 한다.

• Proceedings of the KAIS Fall Conference
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• 2008.05a
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• pp.333-335
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• 2008

본 논문에서는 기존의 기술가치평가, 기술 평가의 연구의 한계점을 보완하는 중소기업 대상의 U-IT TE 및 PSMP 설계 Model을 제시하여 기술 환경 및 기업의 기술 관련 능력을 종합적으로 평가하는 도구로 활용하고, 기술을 정량적으로 분석 평가하고 제품 생산 완료까지의 Process를 정형화하는 Model을 제시하고자 한다.

• Journal of Korean Society of Environmental Engineers
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• v.36 no.5
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• pp.359-366
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• 2014

For an efficient and reasonable management scheme for protecting the soil environment, a soil ecological risk assessment (ERA) method should be developed prior to utilization, based on the contemporary uses and situations of each country. The Korean environmental policy focusing on soil protection is currently accelerating the development of the soil ecological risk assessment method. The soil ERA requires toxicological data on various trophic levels in the soil environment, and ultimately uses PNEC (Predicted No Effect Concentration), which is derived from collected toxicological data. Therefore, test species that are used to generate toxicity data are essential for conducting reliable ERA. This study aimed to select domestic test species for potential use in a reliable Korean ERA. Copper (Cu) and Nickel (Ni) were identified as target substances, with toxicity data (Cu, Ni) and standard test methods being collected to determine candidate species. The candidate species were first classified by soil trophic level, and then sorted into final domestic species. Forty out of 166 domestic species were determined as potential standard test species, whereas 17 out of 120 species were determined as potential Cu and Ni test species. Finally, this study presented potential soil test species based on the characteristics of the domestic soil environment, and established a preliminary step toward developing a reliable Korean soil ERA method.

• Journal of The Korean Association For Science Education
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• v.40 no.5
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• pp.463-471
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• 2020

The purpose of this study is to analyze application status about the process-centered assessment in elementary school science classes. For this purpose, a survey was conducted with 133 teachers and 2,089 students in elementary schools, and in-depth interviews with eight teachers were conducted. Elementary school teachers had a positive attitude toward the adoption of the process-centered assessment of 2015 revised science curriculum. After applying 2015 revised science curriculum, teachers used more performance assessments and less traditional ones in science classes. Elementary school students recognized that they receive feedbacks from their teachers more often with the implementation of the 2015 revised science curriculum. Through in-depth interviews, it was possible to confirm the difficulty of applying the process-centered assessment of elementary school teachers, such as lack of understanding of process-centered assessment and lack of time for its application. Based on the results of the study, the necessity for improving teacher understanding of process-centered assessment and the need to disseminate process-centered assessment materials are suggested.

• Journal of The Korean Association of Information Education
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• v.20 no.3
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• pp.255-262
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• 2016

In this paper, we proposes a method to effectively evaluate learner competencies of computational thinking. Developed descriptive performance assessment tool is the use of assessment items presented in a creative computing MIT. This tool is selected and modified items through expert delphi technique. The performance assessment tool is composed of four areas that are an experimenting and iterating, testing and debugging, reusing and remixing and abstracting and modularizing. We apply to software classes for the pre-service teachers and conducted this descriptive performance assessment. Applying result of the assessment, the developed assessment tool shows the reliability $Cronbach-{\alpha}$ values higher than 0.6. In addition, the validity of the test results is higher in experts delphi test. Descriptive assessment tool suggested in this study are identified as a useful assessment tool to effectively measure student CT competencies.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.31 no.10B
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• pp.857-865
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• 2006

In order to test and evaluate the various functions and services of NGN would be promised, a specified methodology is needed and a development for the identification of testing object, configuration and test traffic are required. Simulation and analytical modeling methodshave used for IP performance testing, but further study issue still remains. This paper proposes new evaluation methodology to achieve an objective approach rather than a subjective and isolated, based on the real-field environment, for NGN network. For this purpose, background traffic pattern to interfere test traffic was specified and it was tested in actual NGN testbed with systems having NGN technology, such as per bandwidth and packet size. The results shows the suggested methodology is appropriate, comparing with parameters which are Delay, Jitter and Loss the current approach for the end-to-end performance evaluation on NGN.

• Journal of Climate Change Research
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• v.1 no.1
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• pp.21-30
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• 2010

In this study, vulnerability of water resources to climate change was assessed in terms of flood, drought and water management. Criteria and indicators were employed for assessing the vulnerability. The criteria used to assess the vulnerability was sensitivity of the study area, the exposure to climate and the adaptability to climate change. These criteria were quantified and standardized using corresponding indicators. Vulnerability of water resources to climate change is assessed to be generally increasing over time. The appropriate watershed scales are the large drainage basin for national level vulnerability assessment and the small drainage basin for local one.

• Journal of the Korean Chemical Society
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• v.66 no.5
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• pp.405-415
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• 2022

This study investigated the perceptions of high school students for 8 performance assessment methods in a chemistry teacher's class by using an explanatory sequential design. To this end, a survey was conducted with 439 students from 10 high schools, and after that, 28 students from 5 schools were interviewed to interpret the survey results. The findings were as follows: First, students were experiencing a biased assessment method rather than various performance methods. Second, intuitive confirmation, relevance to a career path, and internal growth were mentioned in the performance assessment method that felt fun, and readiness and unclear evaluation criteria were mentioned in the performance assessment method that felt difficult. Third, the students recognized that it was not an appropriate performance method if the assessment result was affected by individual abilities less relevant to the chemistry subject or the assessment criteria were unclear.