• 한국정보통신학회논문지
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• 제26권11호
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• pp.1751-1754
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• 2022

The news articles collected with keyword "non face-to-face" were analyzed through topic modeling applied with LDA algorithm. In this study, collected articles were divided into two periods, period 1(the beginning of COVID-19 spread) and period 2(the end of COVID-19 spread), according to issued date of the articles. The articles of period 1 showed support for non-face-to-face treatment, smart library, the beginning of the online financial era, non-face-to-face entrance exam and employment, stock investment for main topic words. And the articles of period 2 showed conversion to non face-to-face classes, increasing unmanned stores, online finance, education industry, home treatment for main topic words. Also, further issues were discussed through visualization of topic words. These results provide evidence that education and unmanned business in non-face-to-face industries are growing.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2021년도 추계학술발표대회
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• pp.647-650
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• 2021

The most powerful and modern face recognition techniques are using deep learning methods that have provided impressive performance. The outbreak of COVID-19 pneumonia has spread worldwide, and people have begun to wear a face mask to prevent the spread of the virus, which has led existing face recognition methods to fail to identify people. Mainly, it pushes masked face recognition has become one of the most challenging problems in the face recognition domain. However, deep learning methods require numerous data samples, and it is challenging to find benchmarks of masked face datasets available to the public. In this work, we develop a new simulated masked face dataset that we can use for masked face recognition tasks. To evaluate the usability of the proposed dataset, we also retrained the dataset with ArcFace based system, which is one the most popular state-of-the-art face recognition methods.

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

• 대한소아치과학회지
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• 제49권3호
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• pp.310-320
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• 2022

이 연구는 유치 치아형태학 실습을 통해 비대면 수업의 학습 효과를 확인하고자 하였다. 유치 치아형태학이라는 과목명으로 60명의 본과 1학년 학생들은 대면으로 실습수업을 받고 55명의 예과 2학년 학생들은 비대면으로 실습수업을 받았다. 5주간의 실습수업 후 학생들은 실습 과제를 제출했다. 비대면 수업의 학습 효과를 평가하기 위해 1명의 평가자가 실습 과제를 채점했고 Mann-Whitney U 검정 및 chi-square 검정을 사용하여 대면 수업과 비교하였다. 연구 결과 대면 수업에서 실습 점수는 77.43 ± 5.97였고 비대면 수업에서 실습 점수는 76.04 ± 5.83이었다. 유치 치아형태학 실습에서 대면 수업과 비교하여 비대면 수업의 유의미한 차이는 관찰되지 않았다(p > 0.05). 이번 연구로 치아형태학 같은 비교적 실습 도구가 간단한 수업에서 비대면 수업이 대면 수업의 대안으로 사용 가능하다는 결과를 얻었다.

• 한국임상보건과학회지
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• 제10권1호
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• pp.1543-1552
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• 2022

Purpose: It is intended to investigate the satisfaction of dental hygiene students with non-face-to-face online classes and use them as basic data for successful lecture design and operation. Methods: The data collected in this study were analyzed using the lBM SPSS Statistics 21 program. The general characteristics of the study subjects were frequency analysis, non-face-to-face online class satisfaction, and test satisfaction were frequency analysis and technical statistics. Through the independent sample T test, a t-test was conducted to find out whether there was an average difference in online class and test satisfaction according to grade. Results: The advantages of non-face-to-face online classes were that repetitive learning was possible (57.7%), the disadvantage was that there was a lack of real-time communication (74.9%), and the most efficient teaching method was a mixed form of online and face-to-face classes (64.9%). The satisfaction level of online classes was 2.69 points for 'self-directed learning habits,' which was the highest compared to the overall average of 2.55 points, and 2.09 points for 'difficulty in interaction between instructors and learners in online classes.'Non-face-to-face test satisfaction was 2.68 points for 'short test time gives fairness to test results,' higher than the overall average of 2.45 points, and 2.07 points for 'no difficulty accessing the test.'In terms of satisfaction with the non-face-to-face test according to the grade, it was found that the third grade showed a more negative attitude than the second grade in terms of sexual fairness (p<0.05). Conclusions: Through the above results, non-face-to-face online classes require various content development and some mixed classes considering the level of students, and instructors' efforts to improve the quality of classes for interaction between instructors and learners are needed.

• 대한화학회지
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• 제66권5호
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• pp.390-404
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• 2022

이 연구는 비대면 및 대면 상황의 논의기반 탐구 과학 수업에서 나타나는 중학생들의 인식론적 사고의 특징 및 변화를 알아보는 것을 목적으로 하였다. 이를 위해 광역시 소재의 중학교 2학년 4개 학급 113명 학생을 대상으로 비대면 상황의 5개 주제와 대면 상황의 5개 주제의 논의기반 탐구 과학 수업을 적용하였다. 비대면 및 대면 상황의 논의기반 탐구 과학 수업 진행에 따른 중학생들의 인식론적 사고 특징 및 변화를 알아보기 위하여 모둠별 의문 만들기 단계의 논의과정에서 나타나는 논의 활동의 특징과 변화를 비교 분석하였다. 연구결과, 비대면 상황의 논의기반 탐구 수업은 대면 상황의 논의기반 탐구 수업과 비교하여 내용에 대한 이해와 증거제시 타당성 항목에서 높은 수준의 사고가 나타났다. 대면 상황의 수업에서는 비대면 상황의 수업보다 주장제시 타당성과 논의과정의 전개 항목에서 높은 수준의 사고를 보였다. 비대면 상황에서는 직접적인 의사소통이 아닌 글을 바탕으로 논의가 이루어지고 이로 부터 지식에 대한 이해를 높일 수 있었고, 대면 상황에서는 모둠원들과 직접적인 의사소통으로 인한 대인 관계에 의해 영향을 받는 사고가 주로 나타났다.

• International Journal of Advanced Culture Technology
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• 제11권2호
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• pp.210-220
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• 2023

We analyzed and compared factors such as changes in the degree of difficulty of concepts presented in Chemistry I textbook, changes in class types (non-face-to-face, face-to-face), etc. on academic achievement by level (upper, middle, and lower). Students from A high school in Gyeongsangnam-do were selected for the subjects of the study. As a result of analyzing the change in the degree of difficulty of concepts, the total score of chemistry I combined by non-face-to-face and face-to-face classes during the second semester was lower than that of the first semester. As a result of analyzing the impact of factors such as changes in conceptual difficulty, changes in class types, etc. on academic achievement by level, students' grades at the 'lower level' by non-face-to-face classes were lower than those by face-to-face classes. In particular, at the lower level of the second semester, there was a large difference in grades between non-face-to-face and face-to-face classes. In the results of these studies, it was found that instructors' active feedback is important to identify difficulties in understanding learning contents for students with low levels of academic achievement and improve them at the same time.

• Human Ecology Research
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• 제62권2호
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• pp.217-231
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• 2024

The aims of this study were to identify (a) the social network contact frequency of the elderly with children, relatives, and friends; (b) the impact of contact frequency (face-to-face/non-face-to-face) on life satisfaction of the elderly; and (c) the moderating effect of digital capabilities of the elderly on the relationship between social contact frequency and life satisfaction. Data were obtained from the National Survey of Older Koreans 2020. The sample comprised 6,119 adults aged 65+ who were in single or couple households. The principal findings were as follows. First, couple households, higher levels of education, and better health status increased life satisfaction of the elderly. Second, the higher the frequency of face-to-face contact with children and the higher the frequency of non-face-to-face contact with friends, the more positive the effect on life satisfaction of the elderly. Third, the interaction effect of the digital capabilities of the elderly differed according to children, relatives and friends. There was a significant and positive moderating effect on the relationship between life satisfaction and the frequency of face-to-face/non-face-to-face contact with children and the frequency of face-to-face contact with relatives. Conversely, there was a significant negative effect on the relationship between life satisfaction and the frequency of face-to-face/non-face-to-face contact with friends. By examining the impact of non-face-to-face contact on life satisfaction of the elderly in the era of digital transformation, the findings have significance in that they provide basic data to support policies and education programs aimed at improving the digital capabilities of the elderly.

• 한국응용과학기술학회지
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• 제41권2호
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• pp.413-423
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• 2024

8주간 주 2회, 1회 30분 16명의 남자 대학생을 대면 운동 그룹 8명, 실시간 비대면 운동 그룹 8명으로 나누어 운동을 실시하였다. 종속변인으로는 신체조성과 체력을 홈트레이닝 실시 전과 후 총 2번 측정하였다. 자료처리는 운동 방법의 차이와 측정 시기에 따른 신체조성과 체력에 미치는 영향을 알아보기 위해 반복측정 이원배치분산분석(two-way ANOVA with repeated measure)을 실시하였고, 사후분석으로 Bonferoni를 실시하였다. 그룹 간 변화량의 평균 차이를 비교하기 위해 사전-사후 차이의 변화량을 산출한 후 독립표본 t-검정(Independent t-test)을 실시하였다. 모든 통계적 유의수준은 p<.05로 설정했다. 8주간의 홈트레이닝은 대면 운동과 실시간 비대면 운동 방법에 상관없이 남자 대학생의 골격근을 증가시키고 근력, 근지구력, 심폐지구력을 증가시켰다. 또한, 대면·실시간 비대면 운동 방법간의 효과 차이는 나타나지 않았다. 따라서 실시간 비대면은 대면 운동과 마찬가지로 남자 대학생들의 골격근과 체력을 향상시키기에 효과적인 운동 방법이 될 수 있음을 시사한다. 또한, 이동이 불편한 환자들이나 노인들에게 적용될 수 있는 실시간 비대면 운동 프로그램이 검증된다면 대면 운동을 실시하기 어려운 대상에게도 효과적인 방법이 될 수 있을 것으로 사료된다.

• 한국통신학회논문지
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• 제35권12C호
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• pp.984-994
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• 2010

Pose variation is a critical problem in face recognition. Three-dimensional(3D) face recognition techniques have been proposed, as 3D data contains depth information that may allow problems of pose variation to be handled more effectively than with 2D face recognition methods. This paper proposes a pose-normalized 3D face modeling method that translates and rotates any pose angle to a frontal pose using a plane fitting method by Singular Value Decomposition(SVD). First, we reconstruct 3D face data with stereo vision method. Second, nose peak point is estimated by depth information and then the angle of pose is estimated by a facial plane fitting algorithm using four facial features. Next, using the estimated pose angle, the 3D face is translated and rotated to a frontal pose. To demonstrate the effectiveness of the proposed method, we designed 2D and 3D face recognition experiments. The experimental results show that the performance of the normalized 3D face recognition method is superior to that of an un-normalized 3D face recognition method for overcoming the problems of pose variation.