• 공학교육연구
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• 제25권6호
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• pp.69-80
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• 2022

In this study, the application of flipped learning methodology to thermodynamics in mechanical engineering was examined, and how university students view flipped learning and the effects of flipped learning were analyzed. To analyze the effects of flipped learning, pre-class survey, assessment on learning in pre-class, team activities during class, and post-class survey were conducted. The analysis was also conducted on 33 students who took the thermodynamics course in mechanical engineering, and the PARTNER flipped learning model was applied to the class. The results of this study are as follows; In the preliminary survey, the students expected that the flip-learning class with team activities and teaching between team members would be helpful in improving their learning. In addition, students recognized that cooperative learning through a team was helpful for learning. The case reflecting the result of pre-learning evaluation to the subject grades showed higher pre-learning evaluation results than the case not reflecting the result of the pre-learning evaluation to the subject grades, and it was found that the pre-learning evaluation was acting as a factor to promote learning in pre-class. In post-class survey, the satisfaction with the flipped learning class was high, indicating that the effectiveness of the flipped learning class applied to the thermodynamics class was excellent.

• 공학교육연구
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• 제26권6호
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• pp.51-61
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• 2023

In this study, the effects of pre-learning attitude on learning participation and academic achievement was analyzed when applying the flipped learning methodology to engineering subject education. The modified PARTN teaching and learning model was applied, and pre-class survey, assessment on learning in pre-class, and post-class survey were conducted to analyze the effectiveness of flipped learning. The results were analyzed for 24 students who took the applied thermodynamics lecture. They were asked to take the course with the videos provided in the pre-class stage, and a pre-learning assessment was conducted to measure the completeness and understanding of the learning. As a result of the study, it was found that students with relatively excellent learning ability had excellent pre-learning evaluation results and excellent final academic achievement. In addition, the lower the pre-learning completion rate within the pre-learning period or the higher the learning rate using mobile devices, the more difficult it was to faithfully complete pre-learning, leading to poor pre-learning evaluation results. Meanwhile, the survey revealed that conducting pre-learning assessments were helpful in encouraging individual learning. In addition, cases reflecting pre-learning evaluation results to course grades showed higher pre-learning evaluation results than cases not reflecting pre-learning evaluation results to course grades, and in flipped learning classes, pre-learning evaluations act as a factor that promotes pre-class learning.

• 한국초등과학교육학회지:초등과학교육
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• 제36권3호
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• pp.219-226
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• 2017

In this study, the reliability and validity of the retrospective pre-post test were analyzed in order to solve the problem of traditional pre-post test including response shift bias. Samples of the study were 162 elementary school students who are studying at the S university gifted education center in Seoul. Before completion of the field trip, we conducted pre test of science-related attitudes. After completion of the field trip, respondents were asked to compare their responses of pre and post science-related attitudes to quantitatively analyze the commonalities and differences of the two tests. To find out more characteristics, qualitative data such as daily records and interview were also gathered and analyzed. The major results of the study are as follows. First, for the paired t-test, there was no statistically significant difference between separate pre-test scores and retrospective pre-test. There was a very high correlation between the separate pre-test scores and the retrospective pre-test. Second, there were significant differences in all seven sub-factors of science-related attitudes between the retrospective pre-test and the post-test. Third, the separate pre-test scores showed a slightly higher tendency than the retrospective pre-test scores. This suggests that the response shift bias appears when it is performed the separate pre-test in affective domain. As a result of the interview, it was found that the evaluation standards of separate pre-test did not match with those of post-test. Forth, internal consistency reliability of the retrospective pre-test was higher than that of the separate pre-test. However, there were significant differences in six factors of science-related attitudes excluding the 'social implications of science' between the separate pre-test and the post-test. Based on these results, the retrospective pre-post test design provides simplicity and convenience to both respondents and investigators, as it is done with one test. The retrospective pre-post test design can be regarded as a valid design for the self-report measurement of affective domain on a single experimental group.

• 한국컴퓨터정보학회논문지
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• 제27권10호
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• pp.211-222
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• 2022

본 연구는 코로나 이전과 코로나 이후의 강의평가를 비교 분석하여, 코로나 이후 시대에 대학수업에서 고려해야 되는 사항은 무엇인지를 도출하고자 하였다. 이를 위해 서울시 소재 A대학의 4개년도 자료를 이용하였고, 코로나 이전은 2018년~2019년까지, 코로나 이후는 2020년~2021년까지 자료를 이용하였다. 연구결과에 의하면, 교양의 경우에는 "과제"가 코로나 이전과 이후와 상관없이 빈도 및 연결중심성(DC)이 가장 가장 높은 단어로 나타났으나, 전공에서는 "이해"가 가장 중요한 단어로 나타났다. 에코 네트워크의 분석결과, "동영상" 및 "비대면수업"의 경우에는 어렵다고 느끼고 있으며, 교수와 학생간의 "상호작용"이 중요하다고 생각하고 있었다. 결론적으로 코로나 이후의 교양 수업에서는 과제에 대한 비중을 낮추고, 학생과의 상호작용을 높이는 것이 중요하며, 전공의 경우에는 비대면 수업보다는 대면수업으로 운영하고, 동영상도 어렵지 않게 내용을 구성하는 것이 필요하다는 것을 확인하였다.

• 대한지역사회영양학회지
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• 제18권3호
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• pp.243-256
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• 2013

The purpose of this study was to evaluate the effectiveness of Centers for Child-care Foodservice Management (CCFSM)'s support on menu management in child-care centers and kindergartens by comparing two perspectives of pre-support vs. post-support and established vs. non-established. To evaluate dietary variety, we used methods that considered both Dietary Diversity Score (DDS) and Dietary Variety Score (DVS). For surveying pre-support and post-support state by CCFSM, we collected and analyzed menus of June and September, 2012, targeting 7 CCFSM supported institutions. Meanwhile, for surveying state in CCFSM established and non-established areas, we collected and analyzed menus of June, 2012, which were implemented in institutions in CCFSM established (181 places) and non-established (106 places) areas. The results of evaluation on the dietary support by CCFSM showed that post-supporting state by CCFSM (95.3%) was significantly higher than pre-supporting state (77.2%) (p < 0.001) and established areas (87.4%) were significantly higher than non-established ones (77.2%) (p < 0.05) on 'Meeting the DRI for infant'. Evaluation of dietary variety between pre- and post-support state by CCFSM showed that post-support state (total 77.3 point) was higher than pre-support state (total 76.4 point). Evaluation of dietary variety between established and non-established areas showed that established areas (total 81.1 point) were significantly higher than non-established ones (total 77.1 point) (p < 0.001). Therefore, it is considered that dietary support service conducted by CCFSM contributes to improve variety level of diet provided by child-care centers and kindergartens.

• 대한예방의학회:학술대회논문집
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• 대한예방의학회 1994년도 교수 연수회(역학)
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• pp.154-157
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• 1994

The evaluation of diagnostic tests attempts to obtain one or more statistical parameters which can indicate the intrinsic diagnostic utility of a test. Sensitivity. specificity and predictive value are not appropriate for this use. The likelihood ratio has been proposed as a useful measure when using a test to diagnose one of two disease states (e.g. disease present or absent). In this paper, we generalize the likelihood ratio concept to a situation in which the goal is to diagnose one of several non-overlapping disease states. A formula is derived to determine the post-test probability of a specific disease state. The post-test odds are shown to be related to the pre-test odds of a disease and to the usual likelihood ratios derived from considering the diagnosis between the target diagnosis and each alternate in turn. Hence, likelihood ratios derived from comparing pairs of diseases can be used to determine test utility in a multiple disease diagnostic situation.

• Structural Engineering and Mechanics
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• 제27권4호
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• pp.393-408
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• 2007

This paper presents the findings of an experimental study to evaluate retrofit methods which address particular weaknesses that are often found in reinforced concrete structures, especially older structures, namely the lack of the required flexural and shear reinforcement within the columns and the lack of the required shear reinforcement within the joints. Thus, the use of a high-strength fiber jacket for cases of post-earthquake and pre-earthquake retrofitting of columns and beam-column joints was investigated experimentally. In this paper, the effectiveness of the two jacket styles was also compared.

• 기술혁신학회지
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• 제10권3호
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• pp.580-603
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• 2007

본 연구는 출연연구기관의 기관평가요소 분석을 통해 최근까지 출연연구기관에 대한 책임성(accountability)이 어떻게 변화 및 발전되어 왔는가를 분석하고자 한다. 구체적으로 1991년부터 2005까지 기관평가요소를 연구회 설립 이전과 연구회 설립 이후 기간으로 구분하여 분석하였다. 출연연구기관에 요구되는 책임성을 법규준수 책임성, 관리적 책임성, 재무적 책임성, 사업성과 책임성, 사회적 책임성 등 다섯 가지 책임성으로 구분하여 분석한 결과, 연구회 설립이전에는 법규준수 책임성, 관리적 책임성 등이 강조되었으며, 연구회 설립 이후에는 사업성과 책임성, 관리적 책임성이 강조되었다. 법규준수 책임성과 관리적 책임성은 시간이 흐름에 따라 요구하는 구체적인 책임내용이 상당히 변화되었다. 최근에는 사업성과 책임성이 가장 중요한 책임성으로 강조되고 있으며 재무적 책임성도 연구회 설립 이후 새롭게 등장하였다.

• 한국축산식품학회지
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• 제38권2호
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• pp.325-337
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• 2018

This study was conducted to evaluate the effects of pre and post-rigor marinade injections on some quality parameters of Longissimus dorsi (LD) muscles. Three marinade formulations were prepared with 2% NaCl, 2% NaCl+0.5 M lactic acid and 2% NaCl+0.5 M sodium lactate. In this study marinade uptake, pH, free water, cooking loss, drip loss and color properties were analyzed. Injection time had significant effect on marinade uptake levels of samples. Regardless of marinate formulation, marinade uptake of pre-rigor samples injected with marinade solutions were higher than post rigor samples. Injection of sodium lactate increased pH values of samples whereas lactic acid injection decreased pH. Marinade treatment and storage period had significant effect on cooking loss. At each evaluation period interaction between marinade treatment and injection time showed different effect on free water content. Storage period and marinade application had significant effect on drip loss values. Drip loss in all samples increased during the storage. During all storage days, lowest CIE $L^*$ value was found in pre-rigor samples injected with sodium lactate. Lactic acid injection caused color fade in pre-rigor and post-rigor samples. Interaction between marinade treatment and storage period was found statistically significant (p<0.05). At day 0 and 3, the lowest CIE $b^*$ values obtained pre-rigor samples injected with sodium lactate and there were no differences were found in other samples. At day 6, no significant differences were found in CIE $b^*$ values of all samples.

• 재활치료과학
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• 제8권2호
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• pp.55-66
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• 2019

목적 : 본 연구의 목적은 아동복지시설 아동 치료 재활 지원사업에 참여 한 아동, 청소년을 대상으로 사업이 종료 된 9개월 후에도 치료 프로그램의 효과가 지속되는지 여부를 확인하는 것이다. 연구방법 : 본 연구는 2016년 아동복지시설 아동 치료 재활 사업에 참여하였던 아동, 청소년 중 120명을 대상으로 아동 행동평가 척도를 사용하여 사전(2016년 5월~6월), 사후(2016년 10월~12월), 추후(2017년 9월)평가를 실시하였다. 문제행동의 변화를 확인하기 위해 반복측정 ANOVA(Repeated Mesures ANOVA)로 분석하였다. 결과 : 미취학과 중 고등학생은 사전에 비해 사후에 문제행동이 감소되었고, 추후에 치료효과가 유지되었다. 초등학생은 사전에 비해 사후에 문제행동이 감소되었고, 추후에 더 감소하였다. 결론 : 본 연구 결과, 미취학, 초등학생, 중 고등학생 모든 집단에서 치료효과가 치료 종결 9개월 후에도 지속되고 있다는 것을 확인하였다.