• Title/Summary/Keyword: Internal Acting

Search Result 181, Processing Time 0.029 seconds

A Study on the Acting Load in the Vane Tip of Vane Pump for Design (베인펌프 설계를 위한 베인 선단부의 작용력에 관한 연구)

  • 정석훈
    • Tribology and Lubricants
    • /
    • v.19 no.6
    • /
    • pp.370-375
    • /
    • 2003
  • The radial acting load of vane on the camring in oil hydraulic vane pumps with and without intra­vanes have been investigated. The influences of the discharge pressure and rotating speed of the vane to the load were discussed. The variations of the radial acting load of a vane were calculated on the basis of the results measured for the dynamic internal pressure in the four chambers surrounding a vane. It provides essential information for the study of pump dynamics and control, the pump design and the analysis of tribological problems in the sliding components.

Development of a Procedure to Calculate Principal Internal Forces for the Strength Design of a Forklift Truck Brake System (지게차량 제동장치 시스템 강도설계를 위한 주요 내력 계산 프로시져 개발)

  • 유홍희;박근배
    • Transactions of the Korean Society of Automotive Engineers
    • /
    • v.5 no.5
    • /
    • pp.27-36
    • /
    • 1997
  • For the strength design of the brake system of a forklift truck, a procedure to calculate the internal forces acting on the system is presented in this paper. Vehicle dynamics, brake system kinematics, and internal force equilibrium analysis are integrated into the procedure. Design parameters such as stopping distance, maximum decceleration, and maximum torque generated by pedal force are considered in the vehicle dynamics, and geometric parameters of the brake system are considered in the brake system kinematics. With the two analysis results obtained, the internal forces acting in the brake system are finally calculated in the procedure.

  • PDF

A Study on the Characteristics of Internal Dynamic Pressure of Vane Pump (베인 펌프의 내부 비정상 압력특성에 관한 연구)

  • 정석훈;정재연
    • Tribology and Lubricants
    • /
    • v.14 no.1
    • /
    • pp.79-84
    • /
    • 1998
  • This paper presents the experimental study of the dynamic internal pressure within a vane pump. The measurement of the dynamic internal pressure acting on the line contact between the vane and the camring in a vane pump with intravanes have been investigated. The variations of the radial acting force of a vane are calculated from previously measured results of dynamic internal pressure in four chambers surrounding a vane, and the variations of the film thickness are estimated in both the rotational speed ranges from 600 to 1200 rpm and the delivery pressure ranges from 1 to 14 MPa. The experimental technic has been established to obtain the data for performance analysis, such as reaction forces between vane and camring, friction wear at the contact regions, leakage characteristics and net forces upon the pump shaft in case of the unsteady load which is forced to the intravane pressure balance type vane pump.

A Study on the Internal Suspense of Improvisation and Performance Acting - With the Movie "Ask the Way in Jeonju" Hong Sang-soo, Hur Jin-ho As the Movie Center - (영상 속에 나타난 즉흥 연기와 공연 연기에 대한 내면적 서스펜스에 대한 연구 - 영화 "전주에서 길을 묻다"와 홍상수 , 허진호 감독 영화 중심으로 -)

  • Jin, Seung-Hyeon
    • Journal of Korea Entertainment Industry Association
    • /
    • v.14 no.2
    • /
    • pp.41-50
    • /
    • 2020
  • Acting is an act of expressing personality, image, sound, tempo, and movement flexibility in order to effectively express fictional characters in the play. It is said to refer to the action or mood of the person performing the character. In addition, all these acts are important elements of the media that the director wants to convey the subject of the work to the audience. In particular, the actor relies on the ambience, image and passionate role of winning and losing in theatrical film. In addition, more than 60% of the afterimages or remaining images in the film are images of the actor's acting or movement, and the trend of the actor. This study is not about acting divided by Conti, who is under the control of directors and directors. The purpose of this study is to analyze the aesthetic response and analyze the inner half of the suspense in the act and to help influence the expression that is effective in expressing the play.

The Dynamic Behavior of Internal Rotating Slider of Oil Hydraulic Vane Pump (유압베인펌르 내부 회전체의 역학적인 거동)

  • 김장현;정재윤
    • Tribology and Lubricants
    • /
    • v.6 no.2
    • /
    • pp.43-49
    • /
    • 1990
  • The Dynamic Behavior in line contacts between the vane tip and camring in an oil hydraulic vane pump with intravanes has been investigated. Variations of the radial acting force of a vane were calculated from previously measured results of dynamic infernal pressure in four chambers surrounding a vane, and variations of the behavior were estimated in both the rotational speed range from 1200 to 2700 rpm and in the delivery pressure range from 10 to 21Mpa. The results indicate the variations of the radial acting force. Under the standard operating condition (to 14 Mpa, 1800 rpm), the radial acting force on the vane is governed by internal dynamic pressures, but it is more influenced by rotating speed at higher than 2000 rpm relatively.

Management of hepatitis C viral infection in chronic kidney disease patients on hemodialysis in the era of direct-acting antivirals

  • Ko, Soon Young;Choe, Won Hyeok
    • Clinical and Molecular Hepatology
    • /
    • v.24 no.4
    • /
    • pp.351-357
    • /
    • 2018
  • The advent of novel, direct-acting antiviral (DAA) regimens for hepatitis C virus (HCV) infection has revolutionized its treatment by producing a sustained virologic response of more than 95% with few side effects and no comorbidities in the general population. Until recently, ideal DAA regimens have not been available to patients with severe renal impairment and end-stage renal disease because there are limited data on the pharmacokinetics, safety, and efficacy of treatment in this unique population. In a hemodialysis context, identifying patients in need of treatment and preventing HCV transmission may also be a matter of concern. Recently published studies suggest that a combination of paritaprevir/ritonavir/ombitasvir and dasabuvir, elbasvir/grazoprevir, or glecaprevir/pibrentasvir successfully treats HCV infection in chronic kidney disease stage 4 or 5 patients with or without hemodialysis.

Issues on Safety of Long-Acting Muscarinic Antagonist (지속성 무스카린 대항제(LAMA)의 안전성)

  • Lee, Yang-Deok;Cho, Yong-Seon;Han, Min-Soo
    • Tuberculosis and Respiratory Diseases
    • /
    • v.70 no.5
    • /
    • pp.384-389
    • /
    • 2011
  • The prevention of and the controlling of symptoms, reductions in the frequency of exacerbations, and disease severity are central to the pharmacologic therapy of chronic obstructive pulmonary disease (COPD). COPD patients are inclined to be older, have more comorbidities, and use polypharmacy as a result. Long-acting inhaled muscarinic antagonists (LAMAs) is a preferred treatment modality. However, the cardiovascular (CV) safety of anti-cholinergics, including LAMA, has been an issue. In contrast, the results of the UPLIFT trial and a pooled analysis of data from 30 trials of tiotropium illustrates the association of tiotropium with reductions in the risk of all cause mortality, CV mortality and CV events. And, the UPLIFT trial provides clues regarding the additive advantages of tiotropium in COPD patients who already are using long-acting inhaled ${\beta}_2$ agonists and inhaled corticosteroids. Following the contribution of tiotropium as a first LAMA, new LAMAs such as aclidinium and glycopyrrolate (NVA-237) seem to be emerging.

Study on Relations among Emotional Labor, Burnout, Engagement and Customer Orientation of High School Foodservice Employees in Busan Area (부산지역 고등학교 조리종사자의 감정노동, 직무소진, 직무관여와 고객지향성간의 관계 연구)

  • Lee, Kyung-A;Lyu, Eun-Soon
    • Korean journal of food and cookery science
    • /
    • v.31 no.3
    • /
    • pp.370-377
    • /
    • 2015
  • The purpose of this study was to obtain data to improve customer orientation by managing emotional labor in foodservice employees. This study investigated the correlation between emotional labor (surface acting, deep acting), job burnout (emotional exhaustion, cynicism), and job engagement (vigor, dedication, absorption) in high school foodservice employees, and how they affect customer orientation. Our survey was administered to 330 school foodservice employees in the Busan area from June 2 to June 27, 2015. A total of 321 questionnaires were used for final analysis. The mean values for deep acting (p<0.01), cynicism (p<0.01), and dedication (p<0.05) significantly according to the position of the emproyees. The mean customer orientation significantly according to employment status (p<0.01) and meal service time (p<0.01). There was positive correlation (p<0.01) between surface acting, and emotional exhaustion cynicism, but negative correlation (p<0.01) between surface acting and vigor, dedication, absorption, and customer orientation. Deep acting had negative correlation (p<0.01) with emotional exhaustion and cynicism, positive correlation (p<0.05) with vigor, dedication, absorption, and customer orientation. Surface acting had negative influences on emotional exhaustion and cynicism, cynicism had negative influences on vigor, dedication, absorption, and customer orientation. Deep acting had positive influences on absorption and customer orientation, absorption had positive influences on customer orientation. Thus, nutrition teacher(dietitian) should educate foodservice employees the positive effects of deep acting to change their surface acting to deep acting, while actively managing internal customers.

Lubrication Characteristics of High Performance Oil Hydraulic Vane Pump (고성능 유압 베인펌프의 윤활특성)

  • 정재연
    • Tribology and Lubricants
    • /
    • v.9 no.1
    • /
    • pp.45-54
    • /
    • 1993
  • The lubrication characteristics of line contacts between the vane and cam ring in an oil hydraulic vane pump with intravanes have been investigated. Variations of the radial acting force of a vane were calculated from previously measured results of dynamic internal pressures in four chambers surrounding a vane, and variations of the film thickness were estimated in both the rotational speed range from 500 to 1500 rpm and in the delivery pressure range from 1 to 14 MPa. The results indicate the variations of the radial acting force and film thickness. It is found that the regimes of lubrication in the vane tip contacts lover rigid-isoviscous to rigidvariable viscosities.