• International Journal of Advanced Culture Technology
• /
• 제11권1호
• /
• pp.376-388
• /
• 2023

After a longitudinal analysis of the data on the college entrance examination of students enrolled in the Department of Chemistry Education at Gyeongnam from 2014 to 2021, the effect on the academic achievement of general chemistry according to the type of college entrance examination was studied. And the impact on the academic achievement of general chemistry according to the type of admission screening in face-to-face and non-face-to-face teaching-learning was also studied. As a result of analyzing the academic achievement of general chemistry by admission process, students admitted through occasional screening showed relatively high grades of A and B at 88.7%, and the ratio of grades of 1~3 of chemistry I in high school was high. On the other hand, in the case of students admitted through regular admission, the ratio of grades of A and B in general chemistry was very high at 94.3%, and the ratio of grades of 3~4 in chemistry I of the College Scholastic Ability Test was high. As a result of analyzing the academic achievement of general chemistry by class type and admission process, it was found that the grades of chemistry I by face-to-face classes had an effect on the academic achievement of general chemistry in non-face-to-face classes. In both admissions, the academic achievement of general chemistry by face-to-face classes was relatively higher than that of non-face-to-face-to-face classes.

• 한국항공운항학회지
• /
• 제30권3호
• /
• pp.1-9
• /
• 2022

In this study we conducted a research regarding the effect on learning immersion and perception of the learning environment by learning presence of students in the Department of aeronautical science and flight operation in the context of non-face-to-face lectures caused by COVID-19. The relationship between learning presence (cognitive presence, emotional presence, and social presence) and learning commitment showed a high correlation. The learning immersion was also found to increase when cognitive presence, emotional presence, and social presence increased in multiple regression analysis to find out the effects of cognitive presence, emotional presence, and social presence, which are sub-factors of learning presence. The advantage of non-face-to-face classes was to be the ease of learning, and the disadvantage of non-face-to-face classes was the most difficulty of the learning process in the content analysis of the non-face-to-face class environment.

• 실천공학교육논문지
• /
• 제14권1호
• /
• pp.27-35
• /
• 2022

본 연구의 목적은 최근 비대면 교육(online mode)의 형태로 빠르게 전환되고 있는 시점에서 여러 대학 간의 디지털 기술을 토대로 대학 간 공유와 협력을 공유할 수 있도록 비대면 환경에서의 산학협력형 캡스톤 디자인 교과목을 개발하는데 있다. 이를 위하여 비대면 환경, 캡스톤 디자인 등의 문헌 및 선행 연구를 분석하고 비대면 환경에서의 산학협력형 캡스톤 디자인 교과목 개발 모델을 개발하여 적용 방안을 제안하였다. 웨어러블 캡스톤 디자인 프로그램을 시범 적용하여 학생 인터뷰, 설문을 통해 실효성을 확인하고 수정, 보완하였다. 이는 비대면 환경에서 산학협력형 캡스톤 디자인 수업 계획, 개발 시 기초자료 제공 및 단계별 운영가이드로서 활용될 수 있을 것이다.

• 대한방사선기술학회지:방사선기술과학
• /
• 제44권6호
• /
• pp.679-688
• /
• 2021

This study is a questionnaire about the lesson environment that radiation major students prefer in a non-face-to-face live online lesson environment for a total of 133 students, 65 second graders and 68 third graders who are enrolled in the department of radiology at a university located in the Seoul metropolitan area. And checked the satisfactory level by grade. The questionnaire consists of three categories: 1st real-time non-face-to-face lectures, 2nd professor lectures, and 3rd corona lectures. A total of 14 questions, with multiple choice and descriptive response methods. As an evaluation method, in the case of a multiple-choice question, the average was calculated using a 5-point Likert scale. As a result of conducting the independent sample T-test of the SPSS program, the response by grade was P > 0.05, and no significant result was shown by the contents of the questionnaire survey of the second grade. As for the lecture method of the department of radiology after the end of Covid-19 virus, it is better to promote face-to-face lessons in radiation training subjects and non-face-to-face real-time education in subjects centered on radiation theory.

• 통합자연과학논문집
• /
• 제9권2호
• /
• pp.155-160
• /
• 2016

Applying image processing techniques to education, the face of the learner is photographed, and expression and movement are detected from video, and the system which estimates degree of concentration of the learner is developed. For one learner, the measuring system is designed in terms of estimating a degree of concentration from direction of line of learner's sight and condition of the eye. In case of multiple learners, it must need to measure each concentration level of all learners in the classroom. But it is inefficient because one camera per each learner is required. In this paper, position in the face region is estimated from video which photographs the learner in the class by the difference between frames within the motion direction. And the system which detects the face direction by the face part detection by template matching is proposed. From the result of the difference between frames in the first image of the video, frontal face detection by Viola-Jones method is performed. Also the direction of the motion which arose in the face region is estimated with the migration length and the face region is tracked. Then the face parts are detected to tracking. Finally, the direction of the face is estimated from the result of face tracking and face parts detection.

• Tribology and Lubricants
• /
• 제25권3호
• /
• pp.187-191
• /
• 2009

A leakage performance test and an endurance performance test of a 75 ton class turbopump mechanical face seal are performed using water under high speed and high temperature environment. A prototype mechanical face seal is manufactured for the purpose of sealing of fuel between a fuel pump and turbine. By simulating operating condition experimentally, the leakage rate and seal carbon wear rate are obtained to evaluate the performance of the prototype mechanical face seal. The test results show the acceptable leakage performance and reasonable wear tendency as well.

• 대한통합의학회지
• /
• 제9권2호
• /
• pp.53-61
• /
• 2021

Purpose : The purpose of this study is to explore the effectiveness of online blended learning(asynchronous online learning class 1+synchronous online learning class 2) method and discuss the applicability of online blended learning. In this study, we will analyze the differences in class satisfaction and academic achievement between asynchronous online learning and online blended learning classes, and discuss the strengths, weaknesses, and satisfactions of online blended learning. Methods : The subjects of this study were 39 of the occupational therapy students who took the 'child development' course. Asynchronous online learning class was applied for 1-6 weeks and online blended learning was applied for 9~14 weeks. The online blended learning class consisted of 1 hours synchronous online learning and 2 hours asynchronous online learning. For the asynchronous online learning, the screen recording program of OBS Studio was used, and for the synchronous online learning, the Zoom program was used. The results of course evaluation and academic achievement of students according to the type of lecture were compared, and a survey was conducted on the satisfaction of online blended learning. Results : The results of this study are as follows. First, satisfaction(A class: t=-4.19, p=.001, B class: t=-7.94, p=.00) with online blended learning classes was significantly higher than asynchronous online learning. Second, when applying online blended learning class, academic achievement(t=-10.58, p=.00) was significantly higher. Third, the online blended learning class showed the highest satisfaction in improving the interest in the subject, and it was found to be helpful in online class management, professor-student interaction, and class content understanding. Conclusion : We have found that online blended learning can compensate for the shortcomings of online lectures and increase the quality of the lectures and the satisfaction of students. The application of online blended learning should be supplemented according to the characteristics of each class, and I hope that blended online teaching methods can be developed based on new ideas in the future.

• 대한치과교정학회지
• /
• 제19권1호
• /
• pp.201-218
• /
• 1989

This study was focused on the distribution of different facial types of the Class II division I malocclusion groups and skeletal characteristics of the each group and those that anteropsterior relationship of the maxilla and mandible calculated from the analysis of ANB angle and Wits appraisal was quite different from each other, as well. Cephalometric headplates of 140 persons of Class II division 1 malocclusion whose mean age was 11.2 years and 69 persons of normal occlusion whose mean age was 12.2 years were utilize as materials. Measurements were recorded, tabulated and statistically analyzed employing the tracings of the lateral cephalograms, then Class II division 1 malocclusion group was divided into 9 Types according to the angle of SNA and SNB for the anteroposterior relationship of the maxilla and mandible, another 9 Types according to the FH-NPog and SN-MP for the horisontal and vertical relationship, and the other 9 Types according to the ANB and Wits appraisal for intermaxillary relationship as well, with which was based on $Mean{\pm}$ 1SD of those of normal occlusion. The result allowed the following conclusion: 1. $37.1\%$ of population demonstrated maxilla within nounal range and retrognathic mandible to the cranial base, $30\%$ for both maxilla and mandible within normal range, $20\%$ for retrognathic maxilla and mandible and $12.9\%$ of the rest were ananged in Class II division 1 maloccusion groups. 2. Retrognathic mandible and hyperdivergent face accounted for $30.7\%$, mesognathic mandible and neutrodivergent face for $29.3\%$, mesognathic mandible and hyperdivergent face for $16.4\%$, retrognathic mandible and neutrodivergent face for $13.6\%$, mesognathic mandible and hypodivergent face for $10\%$ of population were computed in Class II division 1 malocclusion groups. 3. It was suggested that skeletal Class II malocclusion might be due to anomaly in size and shape of cranial base, underdevelopment of mandible, retropositioning of mandible, underdevelopment of posterior face against anterior face, or any combination of these factors. 4. Population with underdevelopment and / or retropositioning of the mandible showed hyperdivergent tendency of facia profile. 5. The ANB angle and Wits appraisal did not coincide the severity of anteroposterior dysplasia in $35.7\%$ of Class II division 1 malocclusion group each other, and this inconsistency was suggested to be related with mandibular rotation, inclination of cranial base, and anteroposterior position of the maxilla.

• 한국컴퓨터정보학회:학술대회논문집
• /
• 한국컴퓨터정보학회 2022년도 제66차 하계학술대회논문집 30권2호
• /
• pp.641-643
• /
• 2022

COVID-19로 인해 대학 수업 운영에도 많은 변화가 생겼고 현재도 다양한 수업 방식이 시도되고 있다. 특히 컴퓨터 프로그래밍과 같이 실습이 중요한 비중을 차지하는 교과목들은 대면수업이 더 효과적일 것이라고 많은 교수자들이 생각하고 있다. 본 연구진 역시 사전에 그런 인식을 가지고 연구를 진행하게 되었다. 그러나 예상했던 것보다 비 대면이나 혼합 방식의 수업을 선호하는 학생들의 비중이 꽤 컸으며 그 이유도 매우 구체적이고 다양하였다. 본 연구에서는 대면, 비대면, 혼합 방식의 수업을 모두 경험한 컴퓨터공학과 전공 수업 참여 학생들을 대상으로 효과적인 프로그래밍 수업 방식에 관한 설문을 실시하고 그 결과를 분석해보았다. 이 연구의 결과는 post COVID 19의 시대를 살아가면서 COVID 19으로 인해 생긴 대학 수업의 변화와 요구들을 수업 운영에 좀 더 긍정적으로 활용하는 기초가 될 것으로 생각한다.

• 문화기술의 융합
• /
• 제8권2호
• /
• pp.235-242
• /
• 2022

이 연구의 목적은 S 대학교 교양 필수 과목 중 하나인 교양 영어의 효과적인 수업을 제안하고 학습효과에 대해 분석하고자 한다. 이 과목은 1학년 전공이 다른 학생들을 대상으로 하고 학습 목표는 일상적인 상황에서 학생들의 영어 능력, 특히 문장을 문법적 요소로 분석하여 읽기 능력을 향상시키는 데 있다. 본 논문은 코로나 시대에 교양 영어 수업을 어떻게 융합 수업 형태로 진행하여 학생들의 학습동기를 유발하고 학습효과를 낼 수 있는지 고찰해 본 것이다. 이 융합 수업의 형태는 첫째, 강의 영상, 둘째, Webex 실시간 비대면 수업, 셋째, 대면 수업이다. 이 연구에서는 실제 한 학기 동안 이루어졌던 수업 중 1차시 수업의 수업 절차를 예시로 제시하였다. 연구자는 구체적으로 수업전 수강 설문지를 조사하여 그 결과를 통해 학생들의 영어 실력과 학습자의 특성 등을 파악하여 수업을 진행하였다. 그리고 수강 후 설문지를 30개 항목으로 조사하여 그 결과를 분석하였다. 구체적으로 강의 구성에 대한 만족도, 강의 영상에 대한 만족도, 대면 수업에 대한 만족도, 학생들과의 상호작용, 학습효과 등에 관한 결과를 분석하였다. 이 수업 제안은 융합 형태의 학습자 중심의 모형이다.