Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 4

Search results for: Yoo Jaejun

4 Failure Mechanism of Slip-Critical Connections on Curved Surface

Authors: Bae Doobyong, Yoo Jaejun, Park Ilgyu, Choi Seowon, Oh Chang Kook

Abstract:

Variation of slip coefficient in slip-critical connections of curved plates. This paper presents the results of analytical investigations of slip coefficients in slip-critical bolted connections of curved plates. It may depend on the contact stress distribution at interface and the flexibility of spliced plate. Non-linear FEM analyses have been made to simulate the behavior of bolted connections of curved plates with various radiuses of curvature and thicknesses.

Keywords: slip coefficient, curved plates, slip-critical bolted connection, radius of curvature

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3 Problems in Education and Possible Suggestions Based on Evaluation of No Child Left Behind and Every Student Success Acts

Authors: Jaejun Jong, Tianhao Zhao

Abstract:

No Child Left Behind (NCLB) was implemented in 2002 by President George W. Bush. NCLB intended to increase attention to underperforming students, such as students with special needs. Unlike its original intention, which was to enhance students' math and reading ability and close the gap between students in schools, NCLB entailed serious problems. In order to address these, the Every Student Succeeds Act (ESSA) was passed under President Barack Obama, aiming to guarantee that all children receive a fair, equitable, and high-quality education and to close educational achievement gaps. Despite the endeavors of ESSA to solve the drawbacks of NCLB, ESSA failed to solve the drawbacks, such as excluding students with special needs, failing to provide enough teachers, and narrowing down the curriculum to math and language. This paper aims to understand why problems have occurred by evaluating NCLB and ESSA, and notable suggestions are made that could be used to supplement the ESSA.

Keywords: ethical issues in education, primary education, educational quality and standards, students with special needs

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2 The Use of Surveys to Combat Fake News in Media Literacy Education

Authors: Jaejun Jong

Abstract:

Fake news has recently become a serious international problem. Therefore, researchers and policymakers worldwide have sought to understand fake news and develop strategies to combat it. This study consists of two primary parts: (1) a literature review of how surveys were used to understand fake news and identify problems caused by fake news and (2) a discussion of how surveys were used to fight back against fake news in educational settings. This second section specifically analyzes surveys used to evaluate a South Korean elementary school program designed to improve students’ metacognition and critical thinking. This section seeks to identify potential problems that may occur in the elementary school setting. The literature review shows that surveys can help people to understand fake news based on its traits rather than its definition, due to the lack of agreement on the definition of fake news. The literature review also shows that people are not good at identifying fake news or evaluating their own ability to identify fake news; indeed, they are more likely to share information that aligns with their previous beliefs. In addition, the elementary school survey data shows that there may be substantial errors in the program evaluation process, likely caused by processing errors or the survey procedure, though the exact cause is not specified. Such a significant error in evaluating the effects of the educational program prevents teachers from making proper decisions and accurately evaluating the program. Therefore, identifying the source of such errors would improve the overall quality of education, which would benefit both teachers and students.

Keywords: critical thinking, elementary education, program evaluation, survey

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1 Possible Reasons for and Consequences of Generalizing Subgroup-based Measurement Results to Populations: Based on Research Studies Conducted by Elementary Teachers in South Korea

Authors: Jaejun Jong

Abstract:

Many teachers in South Korea conduct research to improve the quality of their instruction. Unfortunately, many researchers generalize the results of measurements based on one subgroup to other students or to the entire population, which can cause problems. This study aims to determine two things: (1) examples of possible problems resulting from generalizing measurements based on one subgroup to an entire population or another group and (2) reasons teachers often generalize the results of measurements based on subgroups to entire populations or other students. This study is needed as teachers’ instruction and class quality significantly affect the overall quality of education, but the quality of research conducted by teachers can become questionable due to overgeneralization. Thus, finding potential problems and understanding why teachers generalize subgroup-based results can improve the overall quality of education. The data in this study were gathered from 145 sixth-grade elementary school students in South Korea. In addition, interviews were conducted with 14 elementary school teachers in South Korea. The results showed that students in different classes could differ significantly in various ways; thus, generalizing the results of subgroups to an entire population can engender erroneous student predictions and evaluations, which can lead to inappropriate instruction plans. The main reason for using such unsound generalization stems from teachers’ lack of knowledge of research methodologies. The interview showed that none of the teachers had the opportunity to take research methodology classes when they attended university as undergraduate students and there were no online research methodology courses available for teachers. This result shows that providing teachers with research methodology classes and revising teacher education programs in South Korea can significantly improve the quality of education.

Keywords: generalization, measurement, research methodology, teacher education

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