• 복식문화연구
• /
• 제21권4호
• /
• pp.521-534
• /
• 2013

This study aims to identify the formative features of inflatable fashion that has changed its form or fulfilled specific functions by inserting air between fabrics or between clothes and the human body. Images of inflatable fashion images after the 1990s were collected from the literature and internet data and were analyzed based on the formative features of inflatable design. Through this analysis, it was determined that there were four formative features of inflatable fashion: First, inflatable fashion has functionality. General fashion also has functionality, but inflatable fashion has expanded functionalities such as an air bag effect or insulation due to injected air. Second, the formative potential. Inflatable fashion can be changed into different forms depending on the amount of air injected. Light-weighted air holds up the material of the clothes. So new forms that are different from conventional fashion, which gives inflatable fashion its formative potential, can be suggested. Third, aesthetic expansion. Inflatable fashion when its volume is expanded expresses the beauty of scale, or expresses a voluptuous beauty when part of human body is exaggerated. Fourth, it has an unconstructive characteristic. Space that is visible due to the transparent material of inflatable fashion expresses the intention of the designer to fulfill an unconstructive concept. In conclusion, the formative features of inflatable design have formative significances : practicality, aesthetic significance, semantics and technical significance.

• International Journal of Naval Architecture and Ocean Engineering
• /
• 제7권1호
• /
• pp.212-225
• /
• 2015

In order to preserve the quality of fresh water in the artificial lake after the reclamation of an intertidal flat at the mouth of a river, we suggest two novel methods of water purification by using tidal potential energy and an enclosed permeable embankment called an utsuro (Akai et al., 1990) in the reclaimed region. One method uses an inflatable bag on the seabed within an utsuro, while the other uses a moored floating barge out of a dyke. Each case employs a subsea pipe to allow flow between the inside and outside of the utsuro. The change in water level in the utsuro, which is pushed through the pipe by the potential energy outside, caused circulation in the artificial lake. In this paper, we analyzed the inflatable bag and floating barge motion as well as the pipe flow characteristics and drafts as given by a harmonic sea level, and compared the theoretical value with an experimental value with a simple small model basin. The numerical calculation based on theory showed good agreement with experimental values.

• 대한임베디드공학회논문지
• /
• 제12권2호
• /
• pp.105-112
• /
• 2017

To control the depth of an underwater glider, a control method by using Lyapunov's direct method is proposed. The underwater glider has a torpedo-shape hull, a movable mass in the hull, and an inflatable buoyancy bag in the hull, but doesn't have large wings that increase the lift force for the conventional underwater glider. The control laws to adjust the position of the movable mass and the mass of the inflatable buoyancy bag are derived. For a selected speed and an angle of attack, we simulated the operation of the underwater glider using Matlab/Simulink. The efficiency of the proposed controller is shown in the fact that the control effort is active during only a short period of time when the zigzag trajectory is changed from downward to upward or vice versa.

• Tuberculosis and Respiratory Diseases
• /
• 제54권1호
• /
• pp.71-79
• /
• 2003

연구배경 : 원인 미상의 미만성 폐침윤이 있는 경우, 기관지폐포세척술(bronchoalveolar lavage; BAL)이 진단에 유용하나, 심한 저산소혈증이 있는 환자에서는 수기 중 저산소혈증의 악화에 대한 우려로 BAL을 시행하지 못하거나 기관내삽관 후 시행하는 경우가 많다. 이에 저자들은 심한 저산소혈증 환자에서 BAL 시행 시 안면마스크를 통한 지속성 기도양압(continuous positive airway pressure; CPAP)을 시행하여, 이 방법의 유용성 및 안정성을 평가하기 위해서 본 연구를 시행하였다. 방법 : 2001년 1월 2000년 8월까지 삼성서울병원에 입원한 환자 중, 진단적 BAL이 필요하면서 심한 저산소혈증(안면마스크로 산소 10 L/min 공급 시 $PaO_2/F_IO_2\;ratio{\leq}200$)이 있는 환자들을 대상으로 하였다. 기존의 인공호흡기와 안면마스크를 이용하여 흡입산소분율 1.0로 CPAP $5{\sim}6cmH_2O$를 BAL 시행 10분 전부터 BAL 종료 30분 후까지 적용하였다. 기관지내시경은 T-튜브를 통해 구강으로 삽입하여 통상적인 방법으로 BAL을 시행하였다. 수기 전, 직후, 수기 후 30분, 90분과 24시간에 여러 생리학적 지표와 가스교환지표들을 측정하였다. 결과 : (1) 총 7명(남:여=4:3)의 환자를 대상으로 하였으며 연령 중앙값은 56세였다. (2) CPAP 적용 전 $PaO_2$는 $78{\pm}16mmHg$였으며 CPAP 적용 후 $269{\pm}116mmHg$으로 유의하게 증가하였으며(p=0.018) BAL시행 후와 30분 후 $PaO_2$의 유의한 감소는 관찰되지 않았다. 수기 중 $SpO_2$가 90% 미만으로 감소한 환자는 한 명도 없었다. (3) 수기 직후 $PaCO_2$의 유의한 증가, pH의 유의한 감소가 관찰되었으나 수기 후 30분만에 회복되었다. (5) 시행 중 출혈, 기흉, 감염, 혈역학적 합병증은 발생하지 않았으며, 세명의 환자(43%)에서 수기와 무관하게 기저 질환의 진행으로 기관내삽관을 필요로 하였다. 결론 : 심한 저산소혈증 환자에서 안면마스크를 이용한 CPAP을 적용하여 BAL을 시행하면, 수기 시 저산소혈증의 위험 없이 안전하게 검사를 시행할 수 있을 것으로 사료된다.