• 복식
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• 제61권2호
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• pp.1-19
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• 2011

As modern society advances, women's self-consciousness and attitudes toward beautiful appearances have changed. Amid this trend, the young and slim body of adolescent girls expressed in contemporary fashion incites fantasy on continuing youth among women. In modern society, women's youth is frequently regarded as a subject of consumption and a sex product in the mass media. In this regard, the study is focused on examining desire and psychology of worshipping women's youth and beauty in connection with flapper fashion in the 1920s. In the process, the study took a look at the social and cultural background of flapper fashion and conducted an analysis on formative characteristics and aesthetic sense of flapper fashion as follows: First, the formative characteristics include a short skirt that expresses straight lined shape and the beauty of exposure, lighter clothing, thick make-up, short hair style and black or vivid colors, and they lead to exceptional and innovative aesthetic sense in flapper fashion. Flapper fashion style is focused on completely denying outdated fashion worn by women in the age right before. Second, pursuit of mature, graceful and classical beauty that had continued in previous ages has gone through complete changes in the flapper era in the name of pursuit of youth, and the flapper fashion expresses sensual image through the exposure of slim arms and legs of a young girl. In the formative characteristics, aesthetic sense of youth and sensuality inherent in the flapper fashion was generated. Third, women's free-spirited lifestyle at that time and 'aesthetic sense of freedom and amusement that reflected the speed of machine civilization could be found in the flapper fashion. Material and decoration of the flapper fashion pertained to clothing that enabled a free expression through rapid movements. Aesthetic sense of the flapper fashion generated in the process could be defined as women's internal determination to express individual and free-spirited ideas through the use of fashion when tradition and order of the old age were torn down. And this aesthetic sense is continuously affecting modern fashion design.

• 복식문화연구
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• 제26권1호
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• pp.19-29
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• 2018

The purpose of this study is to examine the sociocultural meanings of flapper look in American society during the 1920s. Using the ProQuest database, I searched articles from The New York Times published between 1920 and 1929 for opinions and discussions on the flapper look. Keywords included "clothing," "dress," "fashion," and "flapper," and advertisements and articles on menswear, leisurewear, and bathing suits were excluded. In the resulting articles, I extracted the following sociocultural meanings: autonomy, activeness, practicality, attractiveness, and extravagance. Meanings were analyzed from the opinions and discussions focusing on skirt length, dresses that directly and indirectly exposed the body, heavy make-up, non-constricting underwear, the H-line dress, bobbed hair, hygiene, comfort, and consumption. In sum, the 1920s flapper look represented progressive characteristics such as autonomous and active womanhood and practicality, which matched the technological development of the time. However, the flapper look was commercialized and exploited to make women look attractive and extravagant. Even though American women had access to higher education, more economic power, and suffrage in the 1920s, they were limited in their ability to overcome social conventions and the power of consumerism. Understanding the double-sidedness of flapper look within the social context of the time would enhance the comprehension of the relationship between women's lifestyles and changing fashion.

• 한국의류학회지
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• 제24권2호
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• pp.173-184
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• 2000

The purposes of this study is for consideration of the flapper image through the culture and novels in Jazz Age(1919∼1929) of America. The back ground of flapper fashion was Jazz. Jazz was one of the cultural languages which expressed liveness, noise, salacity, harmony of primitivity, modernity, innocence and freedom. In processing American had gotten economic power, the Jazz Age had new mood which was combined materialism and realitism. Environmental changes of life styles and development of mass culture of modern big cities could aid the birth of modern girls, flappers. They became the main group of new consumer and mass culture in new consciousness and freedom with independence. Their characteristics are confirmed from Fitzgerald's novels, This Side of Paradise and The Great Gatsby. As the results of above, the consciousness of flapper were rebellious attitude, liberalism and actualism. The designs of flapper fashion were expressed by simplicity, functionality, nudity and rhythm. The flapper images are as follows: First, they expressed modern image as a rebellious attitude. Second, flapper had a sensual image of freedom through rhythmical and speedy expression. Third, premature image for pursuing youth could be found. Therefore the changes of culture and women's life styles are very important points for fashion studies and the connecting fashion and other fields like novels is needed also for it.

• 센서학회지
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• 제6권1호
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• pp.72-80
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• 1997

실리콘 공정을 이용하여 마이크로 밸브(valve)를 제작할 때에 역방향 누설 유량은 중요한 문제중 하나이다. 본 논문에서는 플래퍼(flapper)와 노즐(nozzle)을 이용하여 누설 유량이 없는 마이크로 밸브를 설계하고, 실리콘 공정을 이용하여 제작하였다. 제작된 마이크로 밸브의 작동원리는 정방향 압력이 가해질 때에는 유체의 압력이 플래퍼를 위로 밀어서 유체를 흐르게 하고, 역방향 압력이 가해질 때에는 플래퍼를 밀지만 이때는 노즐의 입구에 의해 지지되므로 플래퍼나 노즐이 깨지지 않는 한 유체가 흐를 수 없게 된다. 노즐은 (100) 웨이퍼를 습식식각하여 제작하였고, 플래퍼는 역형상을 $20{\mu}m$만큼 플라즈마 식각장비(RIE)로 수직 식각한 뒤 뒷면에서부터 습식식각을 하여 제작하였다. 제작된 마이크로 플래퍼-노즐 밸브의 정적특성을 해석하였고, 순수를 사용한 실험결과와 비교하였다. 실험결과는 제작된 마이크로 플래퍼-노즐 밸브가 완전한 다이오드적인 특성을 가진다는 것을 보여 주었다.

• 패션비즈니스
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• 제2권3호
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• pp.55-72
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• 1998

The purpose of this study is for consideration of the flapper fashion (1924-1928) in Jazz Age (1919-1929) of America and the influences of it on modern fashion. This study is started from the latest fashion trend which is pursuing it's inspiration into the Jazz Age, the 20s. The etimology of 'flapper' was based on mines is 'flap' such as 'flutter of skirt hemline', 'hands', 'arms', 'wings' and a slang which was applied to young women from 1830. In 20th century it has meant not only new American women but also their fashion and attitude. The designs of flapper fashion were expressed by simplicity, functionality, nudity and rhythm. Simplicity was the best value of this time and the simple image was considered the smartest. Functionality was represented by straight boyish style and loose baggy silhouette that was related to free dome. Nudity was expressed by revealing of legs, arms, backs in shapes and see-through by materials. It was related to sexual attraction and point to youth. Rhythm of flapper fashion expressed optical effect of movement. Using of light material was deep related to freedom of flappers, speed, rhythmical Jazz and dancing. The influences of flapper fashion were giving an opportunity that changed fashion leader from high class to young popular group and simple design of flapper fashion effected to modernization and popularization of American apparel business. And it influenced American casual fashion which was known as brightness, youth and openhearted mood. So flapper fashion can be reganded as the starting point of the street fashion of the 20th century.

• 한국정밀공학회지
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• 제16권2호통권95호
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• pp.50-59
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• 1999

The effect of a variant drain orifice damping on the characteristics of a servovalve flapper-nozzle stage is analyzed. Steady-state characteristics of flapper-nozzle stage and the linearized dynamics of flapper-nozzle assembly with a spool valve show that the variant drain orifice damping could improve such null performance characteristics as null pressure sensitivity and linearity of gain function. Generalized design criterion and a sufficient condition for servovalve stability are also established.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2003년도 춘계학술대회 논문집
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• pp.733-736
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• 2003

This paper presents two systems of two-stage electrohydraulic servovalve with a nozzle-flapper pilot stage, which is controlled by stack-type piezoelectric elements. Two flapper moving mechanisms proposed in this research can compensate for the hysteresis problem and thermal expansion of the piezoelectric elements. The experimental results show that the first flapper moving mechanism has the frequency response of over 500 Hz and the second one has the response of over 600 Hz. And the first simplified servovalve system rising the first flapper moving mechanism has the frequency response of about 150 Hz, and the second system has the response of about 300 Hz at the supply pressure of 210 bar

• 한국정밀공학회지
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• 제20권6호
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• pp.71-80
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• 2003

This paper presents a two-stage electrohydraulic servovalve with a nozzle-flapper pilot stage, which is controlled by stack-type piezoelectric elements. The flapper moving mechanism developed in this research can compensate for the hysteresis problem and thermal expansion of the piezoelectric elements. The experimental result shows that this flapper moving mechanism has the frequency response of about 600 Hz. And a simplified servovalve system using this flapper moving mechanism has the frequency response of about 300 Hz at the supply pressure of 210 bar.

• International Journal of Precision Engineering and Manufacturing
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• 제4권6호
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• pp.29-37
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• 2003

This paper presents a two-stage electrohydraulic servovalve with a nozzle-flapper pilot stage, which is controlled by stack-type piezoelectric elements. The flapper moving mechanism developed in this research can compensate for the hysteresis problem and thermal expansion of the piezoelectric elements. The experimental result shows that this flapper moving mechanism has the frequency response of about 600 Hz. And a simplified servovalve system using this flapper moving mechanism has the frequency response of about 300 Hz at the supply pressure of 210 bar.

• International Journal of Fluid Machinery and Systems
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• 제10권2호
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• pp.176-188
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• 2017

The nozzle-flapper valves are widely applied as a pilot stage in aerospace and military system. A subject of the analysis presented in this work is to find out a reasonable range of null clearance between the nozzle and flapper. This paper has presented a numerical flow coefficient simulation. In every design point, a parameterized model is created for flow coefficient simulation and cavitation under different conditions with varying gap width and inlet pressure. Moreover, a new test device has been designed to measure the flow coefficient and for visualized cavitation. The numerical simulation and test results both indicate that cavitation intensity gets fierce initially and shrinks finally as the gap width varies from small to large. From the curve, the flow coefficient mostly has experienced three stages: linear throttle section, transition section and saturation section. The appropriate deflection of flapper is recommended to make the gap width drop into the linear throttle section. The flapper-nozzle null clearance is optionally recommended near the range of $D_N/16$. Finally through simulation it is also concluded that the inlet pressure plays a little role in the influence on the flow coefficient.