• Human Ecology Research
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• 제61권2호
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• pp.195-218
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• 2023

The purpose of this study was to present a class case that verified the validity, reliability, and usefulness of a portfolio assessment in a cohousing class in the housing area of home economics. To achieve this objective, 241 male and female students in eight classes of the third grade of a junior high school in Gyeonggi-do, Korea, were enrolled in a project class on establishing a cohousing village in which the portfolio assessment method was applied for a total of 10 sessions for approximately four weeks from May 24 to June 16, 2021. To ensure the validity of the portfolio assessment, we designed the lesson after presenting the curriculum goals in detail using the backward design model and developed a specific rubric and conducted all evaluations and feedback based on the rubric to ensure objectivity and reliability. The online tool Padlet was used as a portfolio, which allowed students to easily upload their work, receive feedback from the teacher, and interact with their peers. After the class, the students reflected on the rubric and were generally satisfied with the class using portfolio assessment. This study is expected to facilitate the use of the portfolio assessment method in the classroom, while also supporting student growth and development.

• International Journal of Computer Science & Network Security
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• 제23권6호
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• pp.77-83
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• 2023

This research is conducted to minimize the potential security risks of conducting online exams to an acceptable level as vulnerabilities and threats to this type of exam are presented. This paper provides a general structure for the risk management process and some recommendations for increasing the level of security.

• 한국지구과학회지
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• 제43권4호
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• pp.557-566
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• 2022

The purpose of this study was to examine the status of the field application of the Science II career electives with the application of the 2015 revised curriculum up to the 3rd year of high school. This study focused on examining high school science teachers' perceptions of the student-participatory class and process-centered assessment in Science II subjects, which are career-intensive high school science electives. A total of 192 science teachers responded to the survey questionnaire, and 12 teachers participated in interviews. In the in-depth interviews conducted to supplement the survey results, questions were asked about changes in the overall class, the status of student-participatory classes, and changes in the assessment of Science II subjects due to the emphasis on process-centered assessment. The main research results included teachers' perceptions of changes in teaching and assessment methods with the application of the revised curriculum, the degree to which the eight skills used in Science II classes develop the key competencies of science, and the teaching and assessment methods commonly used in Science II classes. Science teachers generally agreed with the purpose and necessity of introducing student-participatory classes and process-centered assessment, which are the core purpose of the 2015 revised curriculum. However, they had difficulties in practice due to the excessive content of Science II subjects. Problems were also encountered with securing objectivity and fairness during assessments and the operation of online science classes due to COVID-19.

• 한국과학교육학회지
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• 제43권6호
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• pp.563-572
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• 2023

본 연구는 예비 과학 교사가 설계한 온라인 수업 사례를 분석하여 예비 과학 교사가 온라인 수업을 위해 사용하는 교수전략을 알아보고자 하였다. 이를 위해 한 학기 동안 온라인 수업 도구 활용 교육을 경험한 12명의 예비 과학 교사가 작성한 실시간 온라인 수업 교수학습과정안을 수집하여 분석하였다. 예비 과학 교사는 기존의 대면 수업 설계 시 필수적으로 고려하였던 선수학습 확인, 학습목표 제시, 학습동기 유발, 교수학습방법, 학습내용 정리, 교사-학생 상호작용, 학생 평가 등의 요소를 모두 고려하였으며, 이들 각 요소에서 온라인 수업의 한계를 극복하고 대면 수업에서 불가능했던 교수전략을 고안하였다. 또한 예비 과학 교사는 온라인 수업 도구를 원활하게 사용할 수 있는 환경 구축과 관련된 온라인 수업 환경 점검 관련 교수전략까지 고려하고 있었다. 다만 학습목표 제시, 학습동기 유발, 학습내용 정리는 대부분의 예비 과학 교사가 시청각 자료 제시 방식의 온라인 수업 도구를 활용한 기존의 대면 수업의 교수전략을 주로 활용하고 있으며, 학습동기 유발과 학습내용 정리에서 학생 중심의 접근의 교수전략을 매우 드물게 구현하였다. 이러한 결과는 한 학기 동안의 온라인 수업 도구 활용 교육은 부족하며, 예비 교사 교육에서 온라인 수업 도구 활용 교육의 지속적인 운영과 확대가 필요함을 시사한다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.638-641
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• 2013

대학에서는 사이버 교육을 통해 온라인 쪽지 시험을 보거나 온라인 학습을 한다. 그러나, 컴퓨터가 없거나 인터넷이 되지 않는 곳에 있는 다수의 학생들이 온라인 쪽지 시험을 볼 수 가 없는 문제점을 가지고 있다. 최근에는 많은 대학생들이 스마트폰을 가지고 있으며, 어느 곳에서든 스마트폰을 이용하여 웹 서핑, 뉴스, 메신저 등 다양하게 활용하고 있다. 또한, 스마트폰을 통하여 학생들이나 직장인 들은 필요한 서적을 PDF로 담아 학습을 있다. 스마트폰의 장점은 휴대하기 좋고 언제 어디서든 사용할 수 있다는 특징을 가지고 있다. 스마트폰을 통해 어디서든 온라인 학습하고 온라인 쪽지시험을 볼 수 있도록 본 논문에서는 하이브리드 앱을 이용한 스마트폰을 통한 온라인 쪽지 시험뿐만 아니라 본인의 점수와 성취도를 실시간으로 확인 할 수 있는 시스템을 제안 하였다.

• Asian Pacific Journal of Cancer Prevention
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• 제17권12호
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• pp.5237-5242
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• 2016

Background: Cancer screening rates are lower in Japan than those in western countries. Health professionals publish procancer screening messages on the internet to encourage audiences to undergo cancer screening. However, the information provided is often difficult to read for lay persons. Further, anti-cancer screening activists warn against cancer screening with messages on the Internet. We aimed to assess and compare the readability of pro- and anti-cancer screening online messages in Japan using a measure of readability. Methods: We conducted web searches at the beginning of September 2016 using two major Japanese search engines (Google.jp and Yahoo!.jp). The included websites were classified as "anti", "pro", or "neutral" depending on the claims, and "health professional" or "non-health professional" depending on the writers. Readability was determined using a validated measure of Japanese readability. Statistical analysis was conducted using two-way ANOVA. Results: In the total 159 websites analyzed, anti-cancer screening online messages were generally easier to read than pro-cancer screening online messages, Messages written by health professionals were more difficult to read than those written by non-health professionals. Claim ${\times}$ writer interaction was not significant. Conclusion: When health professionals prepare pro-cancer screening materials for publication online, we recommend they check for readability using readability assessment tools and improve text for easy comprehension when necessary.

• 한국컴퓨터정보학회논문지
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• 제11권4호
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• pp.109-117
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• 2006

이러닝 교육 방법은 오프라인 교육의 단점을 보완하는 많은 장점을 갖고 있다. 이와 같은 이유로, 기존의 많은 오프라인 교육기관은 학습효과를 높일 목적으로 온라인 기술을 현장에 도입하였다. 최근의 일반 대학교에서도 온라인 학습을 부분적으로 도입하고 있다. 그 결과 기존의 오프라인 교육의 장점을 온라인 교육에 도입하여 교육의 효과를 높일 수 있는 방법에 대한 연구를 진행하고 있다. 그 결과 온라인에서 학습 효과를 높이기 위해서 학습자를 적절히 평가하고 적절한 피드백을 제공하는 것이 필요하게 되었다. 따라서. 본 논문에서는 오프라인의 장점을 온라인에 도입하여 학습 능률을 향상시킬 수 있는 모델을 제안하고자 한다. 제안한 모델의 핵심은 올바른 평가에 있다. 그러므로, 학생들을 위한 정확한 평가를 위해서 문항반응검사를 실시하여 학습자를 평가하고 수준별 학습을 할 수 있도록 하였다. 또한, 온라인에서 학생의 학습 스타일을 알아내어 각 학생의 잘못된 학습 성향을 개선하게 하여 학습의 효과를 높이도록 하는 방법을 제안하였다. 향후 본 논문에서 제안 방법이 현장에서 활용된다면 학습자의 학업능력 개선에 도움이 될 것으로 기대한다.

• 전기학회논문지
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• 제57권7호
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• pp.1123-1128
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• 2008

The necessity of online dynamic security assessment is getting apparent under Electricity Market environments, as operation of power system is exposed to more various operating conditions. For on-line dynamic security assessment, fast transient stability analysis tool is required for contingency selection. The TEF(Transient Energy Function) method is a good candidate for this purpose. The clustering of critical generators is crucial for the precise and fast calculation of energy margin. In this paper, we propose a new method for fast decision of mode of instability by using stability indices and energy margin. The method is a new version of our previous paper.[1] Case studies are showing very promising results.

• Smart Structures and Systems
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• 제21권5호
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• pp.705-713
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• 2018

High-speed rail (HSR) has been in operation and development in many countries worldwide. The explosive growth of HSR has posed great challenges for operation safety and ride comfort. Among various technological demands on high-speed trains, vibration is an inevitable problem caused by rail/wheel imperfections, vehicle dynamics, and aerodynamic instability. Ride comfort is a key factor in evaluating the operational performance of high-speed trains. In this study, online monitoring data have been acquired from an in-service high-speed train for condition assessment. The measured dynamic response signals at the floor level of a train cabin are processed by the Sperling operator, in which the ride comfort index sequence is used to identify the train's operation condition. In addition, a novel technique that incorporates salient features of Bayesian inference and time series analysis is proposed for outlier detection and change detection. The Bayesian forecasting approach enables the prediction of conditional probabilities. By integrating the Bayesian forecasting approach with time series analysis, one-step forecasting probability density functions (PDFs) can be obtained before proceeding to the next observation. The change detection is conducted by comparing the current model and the alternative model (whose mean value is shifted by a prescribed offset) to determine which one can well fit the actual observation. When the comparison results indicate that the alternative model performs better, then a potential change is detected. If the current observation is a potential outlier or change, Bayes factor and cumulative Bayes factor are derived for further identification. A significant change, if identified, implies that there is a great alteration in the train operation performance due to defects. In this study, two illustrative cases are provided to demonstrate the performance of the proposed method for condition assessment of high-speed trains.

• 디지털산업정보학회논문지
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• 제11권1호
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• pp.135-144
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• 2015

This study aims to propose an evaluation model that enables cooperative learning using e-Learning system. Even if the teacher and the student are not in the same place at the same time, the team project deliverable submitted by the student to the online system can be viewed by the teacher, enabling the teacher to assess the student not only based on the project but also in many other aspects. The proposed e-learning cooperative learning model allows the development of assessment factors, using such factors in assessment of the student's activities which are performed through the e-learning system, and the feedback of the results to the student so that the student is further motivated for learning. The teacher performs a comprehensive assessment of such factors, which is considered in conjunction with the student's assessment. Implementing the cooperative learning model proposed in this study in various e-learning systems such as Moodle is expected to motivate the student for learning, produces better cooperative learning results, provides greater convenience of assessment to the teacher, and improves fairness of assessment by showing the student's activities in real time.