• 한국과학교육학회지
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• 제21권1호
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• pp.22-29
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• 2001

이 연구의 목적은 피드백을 고려한 포트폴리오 평가를 적용한 수업이 초등학교 학생들의 과학 지식, 탐구 능력, 포트폴리오 평가에 대한 자기 인식에 미치는 영향을 알아보는 것이다. 이 연구를 위하여 시근교에 위치한 초등학교 5학년 2반을 선정하였다. 한반은 실험반으로 피드백을 고려한 포트폴리오 평가를 적용한 수업을 실시하였으며, 다른 반은 비교반으로 피드백을 고려하지 않은 포트폴리오 평가를 적용한 수업을 실시하였다. 연구자가 직접 이 반을 모두 가르쳤다. 연구 결과, 과학 지식에서는 실험반과 비교반이 통계적으로 차이가 있었다. 과학 지식의 하위 요소들을 분석한 결과, 피드백의 효과는 기억과 이해 영역에서 긍정적이었으나, 적용 영역에서는 효과적이지 못하였다. 탐구 영역에서도 효과가 나타나지 않았다. 포트폴리오 평가에 대한 인식을 알아본 문항에서는 실험반 학생들이 수업의 효과에 대한 인식과 과학에 대한 태도의 인식에서 비교반보다 더 긍정적으로 반응하였다. 그러나 비교반 학생들은 자신의 포트폴리오 작품에 대한 인식과 피드백의 필요성에 대한 인식이 실험반보다 더 긍정적이었다.

• 대한화학회지
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• 제46권3호
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• pp.287-295
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• 2002

이 연구에서는 자기평가가 중학교 학생들의 과학 개념 이해와 과학 관련 태도에 미치는 영향을 알아보았다. 연구대상은 자기평가를 실시한 3개 학급을 실험집단으로, 자기평가를 실시하지 않은 2개 학급을 통제집단으로 구분하였다. 실험집단은 자기평가를 실시한 후 피드백을 제공한 집단과 자기평가만 실시하고 피드백은 제공하지 않은 집단으로 구분하였다. 수업은 9주(20차시)에 걸쳐 실시하였고, 과학 개념 이해 검사는 사후, 과학 관련 태도 검사는 사전, 사후에 이루어졌다. 연구결과, 과학 개념 이해에서는 자기평가를 적용한 실험집단이 자기평가를 적용하지 않은 통제집단에 비해 더 향상된 것으로 나타났다. 또한 과학 관련 태도 향상에도 자기평가를 이용한 수업이 효과가 있는 것으로 나타났다. 실험집단 내에서 피드백을 제공한 집단은 피드백을 제공하지 않은 집단에 비해 과학 관련 태도 향상에는 통계적으로 유의미한 차이를 보였으나, 과학 개념 이해에서는 유의미한 차이를 보이지 않았다. 자기평가에 대해 학생들은 자기평가가 후속 학습에 영향을 주며, 학습 태도 향상에 도움을 준다고 인식하고 있었다.

• International Journal of Computer Science & Network Security
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• 제24권9호
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• pp.135-149
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• 2024

This research aimed to promote the electronic evaluation tools to tackle the pandemic implications (corona, COVID-19) and analyze the attitude and academic acceptance at the level of the female student's in the department of computer science - faculty of computer science and information technology at Jazan University, Saudi Arabia. The student's attitude toward e-assessment tolls has been measured and the main research sample consisted of 40 students' experimental group. A survey is also conducted to the assessment of the validity and reliability of research questions with the help of 50 students before implementation. There was a statistically significant difference between students' average grades in the post-measurement of the tendency toward electronic evaluation of the experimental groups in favor of the experimental group, at the significance level (0.01). The results also showed a statistically significant difference at the level of significance (0.01) between average scores of students in academic acceptance level in the experimental groups in favor of the experimental group. The findings of this research indicate the achievement of the e-Evaluation Acceptance and are highly recommended to propagate the use of electronic evaluation.

• 대한조선학회논문집
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• 제59권4호
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• pp.200-206
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• 2022

This study is to develop database by an experimental method for the development of condition based maintenance for auxiliary equipment in marine engine systems. Existing ships have been performing regular maintenance, so the actual measurement data development is very incomplete. Therefore, it is best to develop a database on land tests. In this paper, a database developed by an experimental method is presented. First, failure case analysis and reliability analysis were performed to select a failure mode. For the failure simulation test, a test bed for land testing was developed. The failure simulation test was performed based on the failure simulation scenario in which the failure simulation test plan was defined. A 1.5TB failure simulation database has been developed, and it is expected to serve as a basis for ship failure diagnosis and prediction algorithm model development.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 2005년도 춘계 학술발표회 논문집
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• pp.28-35
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• 2005

It is now well recognized that the ultimate limit state approach is a much better basis for design and strength assessment of ships and offshore structures since it is difficult to determine the realistic margin of safety using the traditional allowable working stress approach on the basis of linear elastic method solutions together with buckling strengthchecks adjusted by a simple plasticity correction. This paper outlines ALPS theory for ultimate limit state assessment of ship structures. ALPS is a computer software which stands for nonlinear Analysis of Large Plated Structures. Application examples of ALPS program to ultimate limit state assessment of plates, stiffened panels and ship hull girders are presented. A benchmark study is made by a comparison with the ALPS solutions with other methods including class rule formulae, nonlinear finite element methods and experimental results. Future trends on ultimate limit state assessment of ship structures are addresse[1]

• Steel and Composite Structures
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• 제35권4호
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• pp.527-544
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• 2020

This research presents the design and numerical assessment of composite steel-concrete frame structures with welded dissipative fuses. The assessment has been carried out based on linear response spectrum, nonlinear static pushover and time history procedures. The analytical expressions which define the envelope of the nonlinear response of the dissipative fuses are first presented and calibrated against experimental results available in literature. The assessment is then carried out according to a design methodology proposed herein. Outcomes of the numerical assessment indicate that the use of welded dissipative fuses successfully limited damage within the replaceable parts. Furthermore, although structures with dissipative fuses present lower strength and, generally, lower displacement capacity, their displacement ductility and global dissipative performance are generally higher than conventional structures, especially when the structure with dissipative fuses presents a dissipative configuration adjusted to the bending moment distribution diagram calculated for the applied seismic action.

• Nuclear Engineering and Technology
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• 제41권4호
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• pp.391-402
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• 2009

This paper introduces the development of safety assessment technology in Korea, focusing on the activities of the Korea Atomic Energy Research Institute in the areas of system thermal hydraulics, severe accidents and probabilistic safety assessment. In the 1970s and 1980s, safety analysis codes and methodologies were introduced from the United States, France, Canada and other developed countries along with technology related to the construction and operation of nuclear power plants. The main focus was on understanding and utilizing computer codes that were sourced from abroad up to the early 1990s, when efforts to develop domestic safety analysis codes and methodologies became active. Remarkable achievements have been made over the last 15 years in the development and application of safety analysis technologies. In addition, significant experimental work has been performed to verify the safety characteristics of reactors and fuels as well as to support the development and validation of analysis methods.

• 대한화학회지
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• 제62권3호
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• pp.203-213
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• 2018

이 연구는 논의기반 탐구 과학수업에서 학생 평가활동이 고등학생들의 주장과 증거 형성에 어떠한 영향을 미치는지 알아보고자 하였다. 이를 위해 인문계 고등학교 1학년 166명을 대상으로 논의기반 탐구 과학수업을 실시하였으며, 실험집단 학생(84명)들은 모둠의 주장과 증거에 대한 평가 기회를 제공받았고 비교집단 학생(82명)들은 이 단계를 생략하였다. 학생 평가활동이 학생들의 주장과 증거 형성에 미치는 영향 알아보기 위해 학생들이 작성한 주장과 증거 그리고 학생 평가활동의 결과를 분석하였으며, 인터뷰와 설문조사를 통해 학생 평가활동의 타당성과 활용정도를 알아보았다. 연구 결과, 논의활동에서 증거를 형성하는 능력이 비교집단보다 실험집단이 통계적으로 유의미하게 높게 나타났으며, 실험집단 학생들이 비교집단 학생들보다 더 정확하고 충분한 증거를 제시하는 것으로 나타났다. 또한 실험집단 학생들은 평가활동을 통해 주장에 대한 증거가 적절한지, 증거가 충분한지, 제시된 증거 자료는 정확한지 대해 평가하며 지속적으로 평가결과를 피드백으로 활용하였음을 알 수 있었다. 학생들은 평가 결과가 대체적으로 타당하다고 인식하고 있으며, 평가 결과를 다음 활동에 반영하여 다양한 증거를 제시하는 능력이 향상되었다고 인식하고 있음을 알 수 있었다. 이를 통해 논의기반 탐구 과학수업에서 학생 평가활동이 학생들의 주장과 증거를 형성할 때 주장의 타당성과 정당성을 높이는 증거 형성에 효과적이라는 것을 알 수 있다.

• 한방재활의학과학회지
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• 제19권2호
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• pp.51-72
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• 2009

Objectives : This study was designed to evaluate the effects of Ohyaksungi-san(Wuyaoshungi-san) and Jungsongouhyul pharmacopuncture on pain reduction and nerve regeneration after crush injury in rat sciatic nerve. Methods : Animal model was produced through crush injury of right sciatic nerve and they were divided into four groups; Group I: no treatment control group; Group II: experimental group treated with Ohyaksungi-san(Wuyaoshungi-san); Group III: experimental group treated with Jungsongouhyul pharmacopuncture; Group IV: experimental group treated with Ohyaksungi-san(Wuyaoshungi-san) and Jungsongouhyul pharmacopuncture. For the assessment of pain, this study was observed the paw withdrawal latency(PWL) and immunoreactivity on the substance-P. For the assessment of nerve regeneration, the sciatic functional index(SFI) and immunoreactivity on the BDNF were measured. Results : 1. In the assessment of pain, the PWL of experimental groups was significantly higher than control group and group IV was significantly higher than other groups at the all days. 2. In immunohistochemical response of substance-P, as time passes, the immunoreactivity of all groups were decreased gradully. Especially, group IV had the lowest immunoreactivity. 3. In the assessment of SFI, the SFI of experimental groups were significantly higher than control group. 4. In immunohistochemical response of BDNF, the BDNF immunoreactivity of all groups was significantly higher than control group and especially, group IV had the highest immunoreactivity at the 14 days after injury. 5. H & E stain was used on the liver and kidney to investigate toxic effect of Jungsongouhyul pharmacopuncture and Ohyaksungi-san(Wuyaoshungi-san) on on 21 days after injury. However there were no any toxic effects both control group and experimental groups. Conclusions : On the basis of these results, we propose that Ohyaksungi-san(Wuyaoshungi-san) and Jungsongouhyul pharmacopuncture were related to pain reduction and motor nerve recovery, also decreased substance-P expression and increased BDNF expression after crush injury of sciatic nerve, especially these two treatments could be more effective when they were combined simultaneously.

• Clinical and Experimental Pediatrics
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• 제46권12호
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• pp.1171-1177
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• 2003