• 한국윤활학회:학술대회논문집
• /
• 한국윤활학회 1999년도 제29회 춘계학술대회
• /
• pp.197-202
• /
• 1999

A mechanical face seal is a tribe-element intended to control the leakage of working fluid at the interface of a rotating shaft and its housing. The leakage of working fluid decreases as the seal surfaces get closer each other. But a very small seal clearance results in a drastic reduction of seal life because of high wear and heat generation. Therefore, in the design of mechanical face seals the compromise between low leakage and acceptable life is important and presents a difficult design problem. And the gap geometry of seal clearance affects seal performance very much and becomes an important design variable. In this study the Reynolds equation for the sealing dam of mechanical face seals is numerically analyzed using the Galerkin Finite Element Method, which can be readily applied to various seal geometries. The film pressures of the sealing dam are analyzed, including the effects of the seal face coning and tilt. Then, opening forces, restoring moments, leakages, and dynamic coefficients are calculated.

• 한국콘텐츠학회논문지
• /
• 제13권2호
• /
• pp.157-174
• /
• 2013

시판되는 전통복식을 착용한 패션인형의 경우 서구적 얼굴이 주를 이루어 한복과 조화를 이루지 못하고 있다. 본 연구는 전통 패션인형에 적합한 얼굴을 개발하여 현대인들의 컬렉션으로써 전통 패션인형의 위상을 재정립하고자 문헌조사, 사례조사, 소비자 설문조사를 실시하고 이 결과를 토대로 얼굴을 디자인하였다. 전통복식을 착용한 패션인형의 얼굴형은 청순한 역삼각형이 많이 나타났으나 선호된 얼굴형은 역삼각형과 타원형이었고 이목구비는 자연스러운 조화를 이루는 세련된 느낌을 선호하였다. 전통 미인 얼굴은 타원형 얼굴형, 쌍꺼풀이 없거나 속 쌍꺼풀의 긴 눈, 도톰한 입, 코끝이 둥글고 오똑한 코를 선호하였다. 이상의 결과를 조합하여 볼을 약간 살린 역삼각형 얼굴형, 큰 눈과 눈동자를 축소하고 속눈썹 길이를 줄인 눈, 코끝이 들리지 않은 둥근 코, 폭이 작고 아랫입술이 도톰한 단정한 입으로 얼굴을 디자인하였다. 개발된 전통 패션인형 얼굴은 국내외 패션인형 마니아의 욕구에 부합하는 문화상품이 될 것이다.

• 디지털융복합연구
• /
• 제19권8호
• /
• pp.311-317
• /
• 2021

본 연구는 비대면 시대에 따른 미술관과 초등학교 연계 온라인 교육프로그램을 중심으로 디지털 기술기반의 더 나은 교육 환경 조성을 위한 사용자 경험 유도 방안을 제안하고자 한다. 이에 국내외 실시하고 있는 미술관 온라인 교육프로그램 현황을 분석하고 사용자 경험을 측정하기 위해 참여한 어린이와 학급 교사를 대상으로 1차 온라인 설문을 진행하였으며, 2차로는 전문가를 대상으로 심층 인터뷰를 시행하였다. 연구 결과, 디지털 미디어를 활용한 학교 연계 교육프로그램의 장단점이 존재했다. 이에 부정적인 의견을 토대로 사용자의 만족도를 높이려는 방안을 제시하였다. 본 연구는 디지털 기술기반의 온라인 교육을 활성화하는 데 의의가 있다. 이 연구가 향후 초등학교에서 진행되는 비대면 온라인 미술 교육프로그램 사용자 경험에 대한 자료로 활용되고 나아가 실질적 활성화 방안을 논의하는 데 도움이 되기를 기대한다.

• 복식문화연구
• /
• 제30권5호
• /
• pp.717-731
• /
• 2022

The purpose of this study is to suggest effective online pedagogical strategies for a fashion design CAD course to enhance student learning and satisfaction. The study investigated student experience of online learning and compared online learning with a face-to-face learning experience. Student concentration, participation, perceptions of effectiveness of teaching, utilization of learning materials, and satisfaction were analyzed using a 5-point Likert scale. Advantages and disadvantages of online learning as well as advantages of face-to-face learning were also analyzed both quantitatively and qualitatively. Student concentration, participation, and perception of effectiveness of teaching were greater for face-to-face learning with significantly higher concentration on individual practice. Students utilized video recording of synchronous online lectures more actively than PDF lecture notes. The advantages of face-to-face learning were plentiful communication and feedback and easy questioning process as well as high levels of understanding and concentration. Meanwhile, major disadvantages of online learning were the speed of the lecture, lower levels of understanding and concentration, limited peer interaction, and technical problems. Major advantages of online learning were flexibility and convenience, repetitive learning through videos, and instant communication and feedback. Students preferred a blended learning approach for the fashion design CAD course. For effective online learning, it is suggested that instructors frequently question and check student practice through screen share in a private online meeting room and engage activities that are demanding of student interaction. The video recording of synchronous online lectures is also suggested as a supplemental learning material for repetitive learning.

• 한국의류학회지
• /
• 제46권2호
• /
• pp.292-309
• /
• 2022

The ongoing COVID-19 pandemic has caused a recession in the fashion industry. Therefore, this study aims to assess the influence of face masks on the selection of fashion products by Korean women in their twenties and thirties. This is highly relevant as the mandatory donning of face masks becomes a social norm. To this end, an in-depth interview and a survey were conducted. The results indicate that wearing a face mask affects consumers' fashion selection criteria in regard to styles, materials, colors, and types. Face masks have gradually contributed to the unification and simplification of fashion styles due to the atmosphere and wearing of the mask itself, which has led to a decline in the overall interest in fashion. Most consumers in this study felt a disconnect between face masks and fashion products, since the former have not been established within most fashion styles. Consequently, consumers had difficulty naturally aligning face masks with various fashion styles, which eventually led to a decreased interest in fashion. This study is significant in that it provides objective data that can be utilized to establish strategies in the fashion industry regarding the integration of face masks.

• Journal of Electrical Engineering and Technology
• /
• 제13권2호
• /
• pp.953-960
• /
• 2018

In recently, eye blink recognition, and face recognition are very popular and promising techniques. In some cases, people can use the photos and face masks to hack mobile security systems, so we propose an eye blinking detection, which finds eyes through the proportion of human face. The proposed method detects the movements of eyeball and the number of eye blinking to improve face recognition for screen unlock on the mobile devices. Experimental results show that our method is efficient and robust for the screen unlock on the mobile devices.

• 실천공학교육논문지
• /
• 제15권2호
• /
• pp.311-319
• /
• 2023

본 연구의 목적은 4차 산업혁명 시대의 미래인재 양성에 대비하여 획일적인 학사규제에서 벗어나, 글로벌 교육 시장에서의 교류와 경쟁을 촉진하고자 집중이수제를 적용하여 팀활동 및 설계활동이 집중되는 설계교과목을 비대면 환경에서 효율적으로 학습할 수 있는 방안을 제시하고자 한다. 이를 위해 집중이수제, 비대면 환경에서의 설계 교과목에 대한 문헌 및 선행연구 분석을 하고 실제 집중이수제 수업 경험이 있는 교원 및 학생의 요구사항 분석 및 전문가 검토를 통해 활용 방안을 제시하고 이를 페르소나 기법을 적용하여 제시하였다. 본 연구는 향후 설계교과목을 집중이수제로 운영 시 실제 활용할 수 있는 기초자료를 제공할 수 있을 것이다.

• 한국CDE학회논문집
• /
• 제13권6호
• /
• pp.403-411
• /
• 2008

The alignment of facial images is crucial for 2D face recognition. This is the same to facial meshes for 3D face recognition. Most of the 3D face recognition methods refer to 3D alignment but do not describe their approaches in details. In this paper, we focus on describing an automatic 3D alignment in viewpoint of quantitative analysis. This paper presents a framework of 3D face alignment and normalization based on feature points obtained by Active Shape Models (ASMs). The positions of eyes and mouth can give possibility of aligning the 3D face exactly in three-dimension space. The rotational transform on each axis is defined with respect to the reference position. In aligning process, the rotational transform converts an input 3D faces with large pose variations to the reference frontal view. The part of face is flopped from the aligned face using the sphere region centered at the nose tip of 3D face. The cropped face is shifted and brought into the frame with specified size for normalizing. Subsequently, the interpolation is carried to the face for sampling at equal interval and filling holes. The color interpolation is also carried at the same interval. The outputs are normalized 2D and 3D face which can be used for face recognition. Finally, we carry two sets of experiments to measure aligning errors and evaluate the performance of suggested process.

• 간호행정학회지
• /
• 제7권2호
• /
• pp.361-375
• /
• 2001

This research aims to produce and implement web-based continuing nurse education programs in response to nurses' educational needs, and to verify them, thus preparing for the times that the program will be offered via web. This research designed, produced and implemented 'emergency nursing' and 'medical fee schedule management' subjects based on Jung, In-seong's(1997) web-based instructional system design, and then compared the learning achievements of web-based learning group of 38 people with those of face-to-face learning group of 39 people. The questionnaire have been developed by these researchers to measure pre-learning knowledge on 'emergency nursing' and 'medical fee schedule management.' Data collected for this research have been given statistical analysis, using SPSS 10.0 for Windows Program. As a result of giving Mann-Whitney test, with respect to pre-learning prior knowledge level, there was no significant difference between the web-based learning group and the face-to-face learning group(Z=-.092, p=.926), while after completing learning, there was a significant difference in the learning achievements between the web-based learning group and the face-to-face learning group(Z=-2.406, p=.008). That is, this research revealed this: the web-based learning group and the face-to face learning group with both having no significant difference in the pre-learning level, after receiving the continuing education each with different methods(face-to-face education and web-based education), showed that the web-based learning groups attained higher learning achievements than the face-to-face learning groups. This result proves the effect of the web-based education to be no worse or even better than that of the face-to-face education, provided that choices of appropriate themes and quality courses composition, as well as systematic design development effective implementation are guaranteed.

• 대한기계학회논문집A
• /
• 제25권6호
• /
• pp.916-922
• /
• 2001

A mechanical face seal is a tribo-element intended to control leakage of working fluid at the interface between a rotating shaft and its housing. Leakage of working fluid decreases drastically as the clearance of the mating seal faces gets smaller. But the very small seal clearance results in an increased reduction of seal life because of high wear and heat generation. Therefore, in the design of mechanical face seals a compromise between low leakage and acceptable seal life is important, and it presents a difficult and practical design problem. A fluid film or sealing dam geometry of the seal clearance affects seal lubrication performance very much, and thereby it is one of the main design considerations. In this study the Reynolds equation for the sealing dam of mechanical face seals is numerically analyzed, using the Galerkin finite element method, which is readily applied to various seal geometries. Film pressures of the sealing dam are analyzed, including the effects of the seal face coning and tilt. Then, lubrication performances of the seals, such as opening forces, restoring moments, leakage, and dynamic coefficients, are calculated, and they are compared to the results obtained by the narrow seal approximation.