• The Journal of Asian Finance, Economics and Business
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• 제7권11호
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• pp.1087-1095
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• 2020

The research purpose of the article is to evaluate the effects of the internal control components on the effectiveness of internal control of transport construction enterprises in Vietnam, on the basis of which we made recommendations to contribute to improving the effectiveness of internal control. Sample was collected from Vietnamese medium and large transport construction enterprises, the total number of sample questionnaires sent was 400, 330 filled-up questionnaires was collected and 250 was used for the study purpose. Quantitative research method was used for the study with the help of the SPSS software. The variables in the model are as follows: the dependent variable is the effectiveness of internal control, 5 independent variables are: control environment, risk assessment, control activities, communication, and monitoring. The results of the analysis explain 80.4% variation as a result of the effect of internal control on the Vietnamese transport construction enterprise. All five components positively affect the effectiveness of internal controls in the order of influence, which are: control activities, control environment, communication, risk assessment and monitoring. This study contributes in providing more empirical evidence about the effects of internal control components on the effectiveness of internal control of transport construction enterprises in Vietnam. The study has proposed a number of recommendations to help transport construction enterprises improve control activities and contribute towards improving the effectiveness of internal control.

• 한국화재소방학회논문지
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• 제24권3호
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• pp.106-112
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• 2010

본 연구는 제연구역 출입문의 자동폐쇄장치의 개발을 위한 기초 연구의 일환으로 자동폐쇄장치의 운동해석을 수행하였다. 본 연구는 자동폐쇄장치의 프로세스와 자동폐쇄조절장치의 운동 메커니즘 정립과 기구 모델링을 바탕으로 자동폐쇄장치의 해석이론을 정립하였고, 해석이론을 바탕으로 한 운동해석 시뮬레이션을 통해 폐쇄력 장치를 선정하고 자동폐쇄조절장치의 각 요소를 설계할 수 있는 엔지니어링 데이터 축과 원천기술을 확립하였다. 따라서 본 연구로부터 자동폐쇄장치 개발의 유연성과 탄력성을 줄 수 있고, 또한 자동폐쇄장치의 개발로 인한 연기의 제어수단과 기술적 대책을 마련하고 제연시스템의 높은 신뢰성과 안정성을 확보할 수 있을 것으로 본다.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2009년도 하계학술발표대회 논문집
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• pp.973-978
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• 2009

In this study, the thermal environment characteristics of On-Off control and thermal difference proportional control method in floor radiant heating system were researched by computer simulation. For the analysis of unsteady heat transfer phenomena in household, the method of using electrical equivalent R-C circuit is applied, and radiation heat transfer between panel, ceiling and walls in household is calculated by enclosure analysis method. The parametric study on two control methods, conventional on-off control and temperature error based time control(T.E.B.T.C.) method, are performed to compare thermal heating control performances, respectively.

• 대한간호학회지
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• 제46권6호
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• pp.780-792
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• 2016

Purpose: This study was conducted to develop a customized birth control program and identify its effects on attitude, subjective norm, behavioral control, intention, and behavior of contraception among immigrant postpartum mothers. Methods: In this experimental study, Vietnamese, Filipino or Cambodian married immigrant postpartum mothers were recruited. They were assigned to the experiment group (n=21) or control group (n=21). The customized birth control program was provided to the experimental group for 4 weeks. Results: The experimental group showed a significant increase in the score of attitude, subjective norm, behavioral control, intention, and behavior of contraception. Conclusion: Findings in this study indicate that the customized postpartum birth control program, a systematic and integrative intervention program composed of customized health education, counseling and telephone monitoring, is able to provide effective planning for postpartum health promotion and birth control behavior practice in married immigrant women.

• International Journal of Advanced Culture Technology
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• 제11권1호
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• pp.63-73
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• 2023

The purpose of this study is to investigate whether there was a difference in the degree of boredom between groups according to whether they participated in the self-control program, and to verify whether the individual's degree of boredom was lowered before and after the self-control program. 148 college students participated in this study. The results showed that the experimental group who participated in the self-control program had significantly lower boredom than the control group. Furthermore, the boredom of individuals who participated in the self-control program was significantly lower after participating in the self-control program than before. This study showed that self-control behaviors significantly affect boredom. Based on the results, theoretical and practical implications to cope with boredom were discussed.

• 소음진동
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• 제8권2호
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• pp.283-288
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• 1998

If one wants to control the noise from a duct, then one must have sufficient number of sensors and actuators so that the control system is observable and controllable. A number of sensors and actuators for control of radiating noise from a duct have to be incorporated with the number of modes which one wants to control. These considerations motivated the present study that considers a control system which has less microphones and actuators than required. In this work, by theoretical analysis and numerical simulation, the control performance and robust reliability of such a kind of control system is investigated in terms of sound-field variables and control system variables. Then the possibility of implementation of the robust radiation power control system is verified by theoretical analysis and numerical simulation. In addition, the control performance of the control system is verified by experiment.

• Journal of Biosystems Engineering
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• 제14권4호
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• pp.229-241
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• 1989

The purposes of this study were to develop an electronic-hydraulic draft control system for tractor implements, to investigate the control performance of the system and the possibility of adaptation to the conventional tractor. Experiments were carried out to investigate the responses of the system to the step and sinusoidal inputs in draft control. The effects of control mode, hydraulic flow rate, reference deadband, and proportional constant on control performance of the system were investigated. Moreover, the effects of filtering signals from draft sensor were also investigated. The following conclusions were derived from the study; 1. In draft control, there were hunting problems in controlling the implement without filtering the draft signals. Filtering was performed by a control program of electronic controller and the control performance and stability of the system were improved significantly. 2. For the draft control system operated on on-off control mode, draft was controlled within ${\pm}27-{\pm}55kg_f$ to the reference draft when the hydraulic flow rates were 5-15 l/min. For the draft control system operated on PWM control, draft was controlled within ${\pm}27kg_f$ to the reference draft regardless of hydraulic flow rates. 3. In the frequency responses of the draft control system, control performance on PWM control mode was not better than on on-off control mode because of characteristics of hydraulic valve and drafe sensor. As the hydraulic flow rates increased for the system operated on on-off control mode, the corner frequency of amplitude attenuation increased, but the corner frequency of phase-angle change remained nearly the same. But, the system was unstable beyond the frequency of 3.1 rad/s. 4. The electronic-hydraulic hitch control system developed in this study showed superior control performance, stability and convenience compared to conventional mechanical-hydraulic hitch control system. It is considered to be a superior replacement for the conventional mechanical-hydraulic hitch control system.

• The Journal of Asian Finance, Economics and Business
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• 제8권3호
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• pp.855-863
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• 2021

This study explores the role of the Accounting Information System (AIS) in mediating the relationship between internal control and the performance of employees. This study examines whether internal control would influence the performance of employees and whether the AIS would impact the performance of employees in Jordan's industrial small and medium-sized enterprises (SMEs). Internal control is expected to impact employee performance. The survey questionnaire was used to gather data. A random sampling approach was used to survey the respondents. A total of 270 questionnaires were distributed; only 203, with a 75% response rate, were available. The data was analyzed using AMOS and SPSS. The result from the analyses provides support for the hypothesis that AIS mediates the relationship between internal control and the performance of the employee. Specifically, this study found evidence that internal control yielded a strong positive relationship with employee performance and a positive relationship with AIS. The study also found that AIS had a positive relationship with the performance of the employee. In brief, internal control has major effects on employee performance. Also, the AIS mediates the relationship between internal control and the performance of the employee. The result of this research found that in the relationship between internal control and employee performance, AIS plays an important role.

• 간호행정학회지
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• 제22권2호
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• pp.167-177
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• 2016

Purpose: This study was conducted to provide basic data necessary to develop a program to improve infection control by examining nurses' perception of accreditation and by identifying its relationship with awareness and performance of infection control. Methods: This cross-sectional study was performed using questionnaires. Data were collected from 210 nurses who were working at one hospital between May 14 and May 19, 2015. Data were analyzed using SPAW. Results: The mean score for nurses' perception of accreditation was 3.10 points out of 5 points. Score for awareness of infection control was $4.63{\pm}0.39$ points and for performance of infection control, $4.39{\pm}0.39$ points. There were significant positive correlation among perception of accreditation, awareness of infection control, and performance of infection control. In the regression analysis, performance of infection control was influenced by awareness of infection control which accounted for 42.6% of the variance. It also showed additional improvement of 1.4% of the variance by when perception of accreditation was added. Conclusion: The result of this study show that nurses' perception of accreditation is relatively positive and that performance of infection control is highly enhanced according to nurses' positive recognition of accreditation as well as attaching importance to accreditation.

• 대한약학회:학술대회논문집
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• 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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• pp.272.1-272.1
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• 2002

We have carried out collaborative study to evaluate a preparation of antithrombin concentrate whether or not it was suitable to serve as the candidate for a Korea National Biological Standard. Six laboratories. including three manufacturers and three National Control Laboratories. participated in this study. The potency of this candidate preparation was determined using the heparin cofactor chromogenic method. (omitted)