• Journal of the Korean Society for Precision Engineering
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• v.31 no.2
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• pp.165-170
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• 2014

Reproducibility of injection molding machines are studied at the study of this time. We applied computer aided engineering program so it could generate clamping force, about 1,500 kN, to the nozzle center part of flex link in tie-bar and at this time, we made sure condition of stress distribution and transformation quantity in flex link. The result of computer aided engineering transformation quantity was confirmed that transformation of top area was 247~257 kN and bottom areas was 273~279 kN and also was confirmed that the stresses are distributed in a range of 57~750 $N/mm^2$ from top to the bottom of the surface. This time we could confirm the condition of transformation quantity and stress distribution by enforcing the previously used structure analysis of flex link. And we utilized the reference data to establish important point of section for non destructive test overhaul.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.17 no.3
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• pp.678-700
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• 2023

Diagnosing breast diseases using ultrasound (US) images remains challenging because it is time-consuming and requires expert radiologist knowledge. As a result, the diagnostic performance is significantly biased. To assist radiologists in this process, computer-aided diagnosis (CAD) systems have been developed and used in practice. This type of system is used not only to assist radiologists in examining breast ultrasound images (BUS) but also to ensure the effectiveness of the diagnostic process. In this study, we propose a new approach for breast lesion localization and segmentation using a multi-scale pyramid of the ultrasound image of a breast organ and a convolutional semantic segmentation network. Unlike previous studies that used only a deep detection/segmentation neural network on a single breast ultrasound image, we propose to use multiple images generated from an input image at different scales for the localization and segmentation process. By combining the localization/segmentation results obtained from the input image at different scales, the system performance was enhanced compared with that of the previous studies. The experimental results with two public datasets confirmed the effectiveness of the proposed approach by producing superior localization/segmentation results compared with those obtained in previous studies.

• Journal of Acupuncture Research
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• v.40 no.1
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• pp.44-52
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• 2023

Background: Previous studies have investigated technology-aided needling training systems for acupuncture on phantom models using various measurement techniques. In this study, we developed and validated a vision-based needling training system (noncontact measurement) and compared its training effectiveness with that of the traditional training method. Methods: Needle displacements during manipulation were analyzed using OpenCV to derive three parameters, i.e., needle insertion speed, needle insertion angle (needle tip direction), and needle insertion length. The system was validated in a laboratory setting and a needling training course. The performances of the novices (students) before and after training were compared with the experts. The technology-aided training method was also compared with the traditional training method. Results: Before the training, a significant difference in needle insertion speed was found between experts and novices. After the training, the novices approached the speed of the experts. Both training methods could improve the insertion speed of the novices after 10 training sessions. However, the technology-aided training group already showed improvement after five training sessions. Students and teachers showed positive attitudes toward the system. Conclusion: The results suggest that the technology-aided method using computer vision has similar training effectiveness to the traditional one and can potentially be used to speed up needling training.

• Proceedings of the Korea Information Processing Society Conference
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• 2003.11a
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• pp.257-260
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• 2003

인터넷에 대한 많은 관심만큼 교육용 웹 사이트를 신뢰성 있고 효과적으로 평가할 수 있는 평가모델의 개발이 활발히 연구되어 지고 있다. 본 논문은 지금까지 여러 분야에서 제시되어 사용되고 있는 다양한 웹 문서 평가기준 기준에 관한 기존 연구를 바탕으로 평가 항목을 제시하였다. 그리고, 교육용 웹 사이트 평가 수준을 계량적으로 표현할 수 있는 모델을 제시하였다. 또한 교육용 웹 사이트 평가 모델의 평가단계 평가 영역별 가증치를 설정하여 평가 모형이 교육용 웹 사이트에서 고유의 특성을 잘 반영할 수 있도록 하였다.

• Communications of the Korean Mathematical Society
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• v.24 no.1
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• pp.111-125
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• 2009

The purpose of this paper is to study n-dimensional QR-submanifolds of (p-1) QR-dimension immersed in a quaternionic projective space $QP^{(n+p)/4}$ of constant Q-sectional curvature 4 and especially to determine such submanifolds under the additional condition concerning with shape operator.

• 한국정보교육학회:학술대회논문집
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• 2006.08a
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• pp.161-171
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• 2006

본 연구의 목적은 초등학생의 컴퓨터 이용 실태를 분석하여 정보통신 윤리교육에 보다 나은 방향을 제시하기 위해 다음과 같은 연구 문제를 제시하여 연구하였다. 첫째, 초등학생의 컴퓨터 이용 실태는 어떠한가? 둘째, 초등학생의 인터넷 이용과 대화방 사용실태는 어떠한가? 셋째, 초등학생의 불법 복제와 정보통신 윤리 실태는 어떠한가? 위와 같은 연구문제를 해결하기 위해 인천광역시 서구 지역에 있는 초등학교 학생들에게 설문지를 배부하여 응답하도록 하였으며 그 설문자료를 분석한 결과를 요약하면 다음과 같다. 이와 같은 분석 결과를 토대로 결론을 정리하면 다음과 같다. 첫째, 초등학생의 컴퓨터 이용시간 및 컴퓨터를 이용하여 주로 하는 일을 살펴보면 컴퓨터 이용 시간의 적절한 조절 능력과 컴퓨터 활용 능력의 배양이 필요하다. 둘째, 건전한 인터넷 문화를 이룰 수 있도록 지도해야 한다. 셋째, 개인의 인격이 존중되듯이 개인의 사생활도 보호되어야 한다. 넷째, 불건전 사이트에 대한 의식은 대다수의 초등학생들이 부정적인 견해를 견지하고 있다. 따라서 보다 나은 인터넷 서핑을 위해서는 아동들로 하여금 불건전 사이트에 대한 접속을 차단할 수 있는 여러 가지 방법을 모색하고 지도를 통해 불건전 사이트에 접속하지 않도록 하는 교육이 실시되도록 하여야 한다.

• 한국정보교육학회:학술대회논문집
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• 2004.08a
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• pp.28-37
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• 2004

The purpose of this paper is Inflect ICT in each subject class of common school by effort about education Information that was regularized with enforcement of the seventh training courses and arrived in visual point that realize education information concretely. But, such realistic that specific discussion and research about actual ICT introduction direction or practical use way consisted enough up to now despite Is urgent example difficult. Decide target connected with Information Technology by classified grade-class and plan that teach learners systematically may have to flow fair discussion and trial run success or failure of education and point that is connected directly problem that establish date or the level and target that it is very as itself value how. Therefore, this research wished to premise computer-aided education target in primary school by analyze education target of each subject that come out in primary grade subject and abroad training courses.

• Archives of design research
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• v.13 no.4
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• pp.145-154
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• 2000

Higher educational results might come from the rational method of curriculum operation. Therefore, every subject in the major course should be planned to response the specialty of students and the efficient method of education are still more needed in technical college, in which students have to get the specialty on the short period of education. Because each subject in the major course works as the close cause and result of educational goal to form the specialty of students, the achievement of educational results in each subject is an important studying part of the educators in technical college. This study is a case of the approaching method for the improvement of learning effect by the connection of subjects 'Space Design' and 'Computer Aided Design' in the Dept. of Industrial design. It is considered to achieve two subjects' educational goals by leading up the students' learning concentration from the comprehension and experience about the co-relationship of the two subjects. And it shows the results of this approaching method such as students could get the design technology of the two subjects, and they could have self-confidence to the managing of the design process and planning of the design works as well.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.1 s.139
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• pp.46-57
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• 2005

This empirical research aims to identify and compare key success factors in Computer Aided Design (CAD) education in Korea, Japan, Germany and USA. Employing a couple of statistical methods (multiple regression and factor analysis) on survey data, it was found that the decisive factors in the CAD education differed among four countries. Generally speaking, however, educational methods are less important than educational conditions, of which professors and educational environment are dominant factors. This implies that the so called constructivistic way of teaching/learning is not so effective as expected. In order to improve educational performance in Korea, as far as CAD education is concerned, professors need to enhance relationship with industry and universities to support more hardware and software.

• Journal of The Korean Association For Science Education
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• v.9 no.2
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• pp.13-27
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• 1989

A curriculum for teaching materials in Science Education was studied as a model for modified experiment on fundamental courses. Conscious effort can be made to desingn experiments that require minimum apparatus: that require low-cost equipment that can be made from cheap locally available materials. Computer-aided instruction programs at high school, freshman course level have been developed. The software package was consist of five programs: The program contains explanation and problems for the calculation of resonance energy, molecular structure, mole concept. Rutherford's experiment. thermodynamic processes. Special course equipment package explanation mole concept, Rutherford's experiment, thermodynamic processes. Special course were designed in Science Education with the understanding that to a certain extent science values would be covered in all of the modified experiments and program models.