• 제목/요약/키워드: Pressure Sensitive

검색결과 787건 처리시간 0.024초

스크롤 압축기의 공동 소음 규명을 위한 음향모드 분석 (Acoustic Mode Analysis to Identify Cavity Noise of Scroll Compressor)

  • 김승엽;이동수;서정환;허대녕
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2004년도 추계학술대회논문집
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    • pp.83-88
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    • 2004
  • Acoustic modes of internal region of 4-hp scroll compressor are identified by measuring transfer functions between a reference and 84 measuring points. The corresponding acoustic mode-shapes and natural frequencies were calculated by analysis software SYSNOISE. There exist two clearly distinguishable dipole modes of vertical and horizontal direction and a single quadrupole mode in the frequency region of interest. It shows that the natural frequencies of the identified modes are linearly sensitive to suction pressure (Ps) but relatively in sensitive to discharge pressure (Pd) in operating condition.

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김치의 나트륨과 푸드 패디즘 (Sodium in kimchi and food faddism)

  • 박채린
    • 식품과학과 산업
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    • 제50권3호
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    • pp.60-69
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    • 2017
  • Kimchi is a traditional fermented food of Korea and made by salting and fermenting vegetables. A negative impression on kimchi as a great source of sodium intake has grown in Korea since 1980 as people argue that sodium is a major cause of high blood pressure and metabolic syndrome. While people are more interested in healthy living in Korea, the negative impression is stronger now. This study analyzes the sensitive and negative reaction to sodium intake from kimchi, and suggests an alternative in the viewpoint that the sensitive reaction is one of food faddism which is a very popular topic currently in Korea.

경화 압력이 접착 조인트의 비틀림 피로 특성에 미치는 영향 (Effects of the curing pressure on the torsional fatigue characteristics of adhesively bonded joints)

  • 황희윤;김병중;이대길
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2004년도 추계학술대회
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    • pp.196-201
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    • 2004
  • Adhesive joints have been widely used for fastening thin adherends because they can distribute the load over a larger area than mechanical joints, require no hole, add very little weight to the structure and have superior fatigue resistance. However, the fatigue characteristics of adhesive joints are much affected by applied pressure during curing operation because actual curing temperature is changed by applied pressure and the adhesion characteristics of adhesives are very sensitive to manufacturing conditions. In this study, cure monitoring and torsional fatigue tests of adhesive joints with an epoxy adhesive were performed in order to investigate the effects of the applied pressure during curing operation. From the experiments, it was found that the actual curing temperature increased as the applied pressure increased, which increased residual thermal stress in the adhesive layer. Therefore, the fatigue life decreased as the applied pressure increased because the mean stress during fatigue tests increased due to the residual thermal stress.

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사출금형 버 발생 방지를 위한 형합면압 측정에 관한 연구 (Study on the Pressure Measurement at Parting Surface to Prevent Flashing in Injection Molds)

  • 최재혁;최순호;태준성;박형필;이병옥
    • 소성∙가공
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    • 제20권1호
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    • pp.73-78
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    • 2011
  • The flashing reduces the part quality and the productivity of the molding process. We developed a contact pressure sensor to detect the flashing immediately. The performance of the sensor was analyzed in a simple 2D simulation. The sensor was applied to an automotive bumper mold with cavity pressure sensors. It showed sensitive output signal for the mold response by the cavity pressure change. It was confirmed that the flashing at the gate area occurred in the filling stage by the pressure increase due to growth of the melt flow length. The sensor output was correlated with the cavity pressure sensor output.

대형 공동 수조에서의 변동 압력 계측 (Measurement of Cavitation-Induced Pressure Fluctuation in a Large Cavitation Tunnel)

  • 나윤철;강관형;김영기;이무열
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2000년도 춘계학술대회논문집
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    • pp.791-796
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    • 2000
  • The cavitation-induced fluctuating pressure of the container ship named "Sydney Express" is measured in Samsung Large Cavitation Tunnel(SCAT). In the measurements, a complete ship model is employed. The effects of thrust coefficient and cavitation number on cavity pattern and cavitation-induced fluctuating pressure were investigated experimentally. It is demonstrated that the fluctuating pressure coefficient is very sensitive to the cavitation number. The results of cavitation and pressure fluctuations are compared with those of ITTC and HSVA, which shows fairly good agreement. It is exhibited that the removal of rudder can significantly change the loading condition of a propeller, and can reduce the fluctuating pressure coefficient almost by half.

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공적 자기의식과 사회문화적 압력이 이상적 외모태도와 신체수치심에 미치는 영향에 관한 비교문화연구 (A Cross-cultural Study on the Influence of Public Self-consciousness and Sociocultural Pressure over Ideal Appearance Attitude and Body Shame)

  • 홍금희
    • 한국의류학회지
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    • 제34권10호
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    • pp.1731-1741
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    • 2010
  • Personal appearance attitude about the ideal beauty is influenced by the context of the culture one belongs to. In a cultural sphere the higher public self-consciousness individuals have then the more sensitive one would be to the sociocultural pressure about thinness and thus the higher the expectations about the ideal appearance. Accordingly, in that culture one would have more body shame when they do not reach the ideal beauty standard. This study examines the difference between Korean and German culture, with a focus on the age group of university students who are especially sensitive to aesthetic consciousness. The results are as follows: There were differences of public self-consciousness, perceived sociocultural pressure, appearance internalization, appearance awareness and body shame between the two cultural spheres; in addition, Korean female university students were significantly higher in all the variables when compared to German female university students. The higher public self-consciousness and perceived sociocultural pressure then the higher the internalization of the ideal appearance; the ideal appearance awareness increased the body shame. In the case of the German female university student group, public self-consciousness influenced body shame directly; however, in case of the Korean female university student group public self-consciousness were not directly affective. Rather, perceived sociocultural pressures directly affected body shame and showed the difference between the cultural spheres. Finally, in regards to the direct effect about body shame, the German female university student group noted the influence of public self-consciousness as the most significant; however, the Korean female university student group noted the influence of sociocultural pressure as the most significant.

In Vitro Percutaneous Absorption of Tenoxicam from Pressure-sensitive Adhesive Matrices across the Hairless Mouse Skin

  • Gwak, Hye-Sun;Chun, In-Koo
    • Archives of Pharmacal Research
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    • 제24권6호
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    • pp.578-583
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    • 2001
  • To investigate the feasibility of developing a new tenoxicam plaster, the effects of vehicles and penetration enhancers on the in vitro permeation of tenoxicam from a pressure-sensititre adhesive (PSA) matrices across the dorsal hairless mouse skin were studied. Vehicles employed in this study were propylene glycol (PC)-oleyl alcohol (OAI), PG-oleic acid (OA), and diethylene glycol monoethyl ether (DCMI)-propylene glycol monolaurate (PCML) cosolvents with/without fatty acids. In this studys amines such as triethanolamine (TEA) and tromethamine (TM) were additionally used as a solubilized. Among PSAs used, $Duro-Tak^{\circledR}$87-2510 showed much higher release rate than either $Duro-Tak^{\circledR}$ 87-2100 or $Duro-Tak^{\circledR}$87-2196. The relatively high flux rate was obtained with the formulation of DCMI-PCML (40:60, v/v) with 3% OA and 5% TM, and the flux increased as a function of the dose;the initial flux up to 12 h was $4.98{\pm}1.38{\;}{\mu\textrm{g}}/{\textrm{cm}^2}/h$ at the tenoxicam dose of $50{\;} mg/70{\;}{\textrm{cm}^2}$. This flux was much higher than that of a commercial piroxicam patch ($Trast^{\circledR}$) ($1.24{\pm}0.73{\;}{\mu\textrm{g}}/$\textrm{cm}^2/hr$) with almost only one-third that of the commercial patch. Therefore, these observations indicated that these composition of tenoxicam plaster may be practically applicable.

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