• 한국태양에너지학회:학술대회논문집
• /
• 한국태양에너지학회 2008년도 추계학술발표대회 논문집
• /
• pp.81-84
• /
• 2008

This paper discussed the validity of wind force power generation in consideration of the topographical characteristics of Korea. In order to estimate the exact generation of wind power plants, we analyzed and compared wind resources in mountain areas and plain areas by introducing not only wind velocity, the most important variable, but also wind distribution and wind standard deviation that can reflect the influence of landform sufficiently. According to the results of this study, generation was higher at wind power plants installed in southwestern coastal areas where wind velocity was low than at those installed in mountain areas in Gangwondo where wind velocity was high. This suggests that the shape parameter of wind distribution is low due to the characteristics of mountain areas. and the standard deviation of wind velocity is large due to the effect of mountain winds, and therefore, actual generation is low in mountain areas although wind velocity is high.

• Agricultural and Biosystems Engineering
• /
• 제6권1호
• /
• pp.22-26
• /
• 2005

A wind-heat generation system was developed and the system consisted of an electric motor, a heat generation drum, a heat exchanger, two circulation pumps and a water storage tank. The heat generation drum is an essential element determining performance of the system. Frictional heat was generated by rotation of a rotor in the drum filled with a working fluid, and the heat stored in the fluid was used to increase water temperature through the heat exchanger. Effects of some factors such as rotor shape, kind and amount of working fluid, rotor rpm and water flow rate in the heat exchanger, affecting the system performance were investigated. Amounts of heat generated were varied, ranging from 126,000 to 32,760 kJ/hr, depending on combination of the factors. Statistical analysis using GLM procedure revealed that the most influential factor to decide the system performance was amount of the fluid in the drum. Experiments showed that the faster the speed of the rotor, the greater heat was obtained. The greatest efficiency of the heat generation system, electric power consumption rate vs gained heat amount of water, was about 70%. Though the heat amount was not enough for plant bed heating of a 0.1-ha greenhouse, the system would be promising if some supplementary heat source such as air- water heat pump is added.

• 한국태양에너지학회 논문집
• /
• 제28권6호
• /
• pp.24-32
• /
• 2008

This paper discussed the Feasibility study of wind power generation considering the topographical characteristics of Korea. In order to estimate the exact generation of wind power plants, we analyzed and compared wind resources in mountain areas and plain areas by introducing not only wind speed, the most important variable, but also wind distribution and wind standard deviation that can reflect the influence of landform sufficiently. According to the results of this study, generation was almost the same at wind power plants installed in southwestern coastal areas where wind speed was low as at those installed in mountain areas in Gangwondo where wind speed was high. This demonstrates that the shape parameter of wind distribution is low due to the characteristics of mountain areas, and the standard deviation of wind speed is large due to the effect of mountain winds, therefore, actual generation compared to southwestern coastal areas is almost similar in mountain areas even though wind speed is high.

• 한국기계가공학회지
• /
• 제20권12호
• /
• pp.65-70
• /
• 2021

Electric kickboards are inviting attention as next-generation transportation systems with their number of users increasing rapidly every year. However, the number of related accidents similarly increases with the increase in the number of users. The purpose of this study is to analyze the structural safety of electric kickboards according to the shape of the connection parts. For this purpose, four different shapes of the connection parts, i.e., cube, cylinder, toroid, and divided cube were selected. Subsequently, the safety was analyzed based on the finite element (FE) analysis under the front collision scenario. The results showed that the shape of the divided cube induced the lowest von Mises stress and the highest safety factor amongst the four models. Moreover, only the shape showed a safety factor higher than 1. However, the shape of the cylinder exhibited the lowest structural vulnerability. These results demonstrate the importance of the shape of the connection part in maintaining the overall safety of an electric kickboard.

• 한국의류학회지
• /
• 제47권3호
• /
• pp.409-424
• /
• 2023

This study aimed to reveal prospective fashion designers' predominant perceptions regarding the ideal body size and shape and to suggest an educational guideline for the design process. Sketch tasks and surveys involving the college students in a fashion design department were conducted over the course of a year. A total of 113 participants designed a white cotton shirt for women in their 30s and 40s. Immediately after the sketching task, the participants answered survey questions on the specific body sizes and shapes they had been picturing. According to the results, the participants designed shirts for a medium-sized, hourglass body shape. As the percentage of women in their 30s and 40s with an hourglass shape is low, a discrepancy exists between the ideal design and the body of the actual consumer. Furthermore, 55% of the participants indicated that they would change the design for a woman with a different body shape. The majority of the participants agreed that understanding the body shape and size is important when initiating ideas. These findings can help educators understand the importance of improving designers' awareness of various body sizes and shapes; they also suggest new directions for fashion design education.

• 한국주거학회논문집
• /
• 제25권5호
• /
• pp.83-91
• /
• 2014

The main purpose of this research is to understand how the problems, which existing letter-shape houses have, are solved in Unjoru which is one of the letter-shape houses. Furthermore, there is the secondary purpose which is to realize the architectural characteristics of Unjoru through the process from the composition of rooms and buildings to the method of structure and roof formation. This research was approached in terms of architectural design, and as the result, the problems of the existing letter-shape houses was resolved by literally converting the shape of outdoor space to 品-shape form. Moreover through the result, it was recognized that the 占-Shape plan was flexible in responding to the demand of the times, such as the order of precedency within men and women and each generation. In addition to the previous results, it was confirmed that the location of major rooms was also decided by considering the interrelationship with natural environment of surrounding area. Also, in the whole proportion of building's plan, each building, such as ㄷ-shape Anchae and big-sized and middle-sized Sarangchae having 丁-shape form, and major rooms in the each building have proportion system such as 1:1, 3:4, $1:\sqrt{2}$, and 3:5 as aesthetic numerical value. Finally, it was understood that the architectural intention had double-sided characters, one side was authority and dignity in the aspect of shape and another side was practicality in aspect of inner housing life.

• 감성과학
• /
• 제12권1호
• /
• pp.129-136
• /
• 2009

캐리커처 자동 생성기를 개발하기 위한 본 연구는 과거의 여러 연구와는 달리 캐리커처 전문가들이 그리는 방법을 관찰하는 것에서 시작하였다. 관찰 과정에서 전문가들이 특히 그림을 그릴 때 대상물의 형태를 다른 유사한 다른 사물과 비슷하게 그려서 그 특징을 과장하고 있는 사실을 발견하였다. 우리가 일상생활에서 '무엇은 무엇을 닮았다'라고 표현할 때, 이는 동일한 형태 군에서 그 차이점을 부각 시켜서 표현하는 것이다. 본 연구에서는 그리고자 하는 대상물의 형태와 가장 유사한 기하학적 형태를 찾아 그 형태를 강조 변화 하고자 하였다. 연구의 범위는 벡터라인으로 그려진 2차원 단일 외형 폐곡선을 캐리커처 형태로 강조 변화하는 것으로 한정하였다. 이를 위하여 4종류의 유사 기하학적 형태 데이터베이스의 구성방법, 대상 유사 기하학적 형태를 찾기 위한 탐색 방법, 탐색된 데이터를 동일 크기와 좌표로 재배열 방법 그리고 강조 변화하는 방법에 관하여 논하였다. 사람 얼굴을 실험 대상으로 선정하여 데이터베이스를 제작하였다. 변화된 결과물에 대해서 설문한 결과 그 가능성이 입증되었다.

• 한국정보과학회논문지:컴퓨팅의 실제 및 레터
• /
• 제16권11호
• /
• pp.1096-1100
• /
• 2010

본 논문에서는 MR 영상에서 중간형상정보를 이용한 활성형상모델 기반의 반월상 연골 자동 분할 기법을 제안한다. 첫째, 훈련집합 내의 형상 변형을 반영하기 위해 반월상 연골 통계형상모델을 생성한다. 둘째, 큰 변형을 갖는 반월상 연골의 견고한 분할을 위해 유사도에 따른 가중치 기법을 이용하여 중간형상정보 생성 기법을 제안한다. 마지막으로 활성형상모탤 적합을 통해 반월상 연골 자동 분할을 수행한다. 제안 방법의 평가를 위하여 육안평가와 정확성 평가 그리고 수행시간을 측정하였다. 정확성 평가는 자동 분할과 반자동 분할 결과간의 평균거리차이를 측정하였고 이를 컬러맵으로 표현하였다. 실험 결과 평균거리차이는 내측 반월상 연골은 $0.54{\pm}0.16mm$, 외측 반월상 연골은 $0.73{\pm}0.39mm$으로 측정되었고, 수행시간은 평균 4.87초로 측정되었다.

• 한국의류산업학회지
• /
• 제10권5호
• /
• pp.702-712
• /
• 2008

The aim of this study is to develop Casual Hanbok design made of Hanji yarn textiles for New Silver generation women. The New silver generation is a coined word which has meaning of a newly silver generation and it is distinguished from pre-silver generation. New silver generation is a generation that is independent and given active role by their age groups and generational characteristic. The concept of silver generation was introduced from maturity market in Japan. This study was based on analysis about their preference of forms, colors, and materials of Casual Hanbok. The survey target were 270 female over age 50 living in Daejeon City. The analysis methods used frequency and percentage. The results were summarized as following. Although almost of them haven't worn Casual Hanbok, they had the positive recognition on wearing one. They preferred longer length jacket to traditional Korean style, shorter length of skirt. They also preferred the traditional sleeve shape and knotted buttons. On the foundation of this fact, 2 styles consist of 5 Casual Hanbok design items made of functional material - Hanji yarn textiles that have antimicrobial, deodorant, quick drying, far infrared radiation which are not harmful to health - for New silver women were suggested. One style was 3 items - blouse, vest, skirt - which are the sense of Korean tradition with activity by patch. The other was 2 items - jacket and skirt - which are the sense of Korean tradition with modern way by quilting. Lastly, these garments were evaluated by 13 experts, they were satisfied with 2 styles and all items. As this study were based on the Elderly women living in Daejeon city, it had the limitation on applying of preference styles to all the New silver generation.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회/대한산업공학회 2005년도 춘계공동학술대회 발표논문
• /
• pp.848-853
• /
• 2005

3D geometric modeling of an object of interest has been intensively investigated in many fields including CAD/CAM and computer graphics. Traditionally, CAD and geometric modeling tools are widely used to create geometric models that have nearly the same shape of 3D real objects or satisfy designers intent. Recently, with the help of the reverse engineering (RE) technology, we can easily acquire 3D point data from the objects and create 3D geometric models that perfectly fit the scanned data more easily and fast. In this paper, we present 3D geometric model generation based on a stereo vision system (SVS) using random pattern projection. A triangular mesh is considered as the resulting geometric model. In order to obtain reasonable results with the SVS-based geometric model generation, we deal with many steps including camera calibration, stereo matching, scanning from multiple views, noise handling, registration, and triangular mesh generation. To acquire reliable stere matching, we project random patterns onto the object. With experiments using various random patterns, we propose several tips helpful for the quality of the results. Some examples are given to show their usefulness.