• The Journal of Asian Finance, Economics and Business
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• v.8 no.12
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• pp.371-376
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• 2021

The article analyzes the impact of factors affecting the internal control system of chemical enterprises in Vietnam, providing more empirical evidence on factors affecting the system of internal control. Research data is collected in the form of face-to-face interviews and email interviews with managers and employees working in different positions, managers at all levels, chief accountants, and accountants of 52 chemical enterprises in Vietnam. The survey results collected 310 questionnaires. After eliminating the invalid questionnaires due to many blank cells, the authors chose to use 297 questionnaires. Quantitative research was carried out with SPSS 25 software. Research results show that Business Strategy, Organizational Structure, Organization's perception of the instability of the external environment, and Organizational culture are the factors that positively affect the internal control system of chemical enterprises. This can be explained that, for chemical enterprises, Business strategy, Organizational structure, Organization's perception of the instability of the external environment, and Good organizational culture will positively impact the internal control system of chemical enterprises. Based on the research results, the authors have proposed recommendations to enhance the effectiveness of the internal control system of chemical enterprises in Vietnam, thereby contributing to improving the performance of enterprises in the chemical Vietnamese.

• The Journal of Internal Korean Medicine
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• v.41 no.6
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• pp.1119-1140
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• 2020

Objective: The purpose of this study was to review Chinese clinical studies of the treatment of gastroesophageal reflux disease (GERD) with herbal medicine including Pinellia ternata. Methods: We searched the China National Knowledge Infrastructure (CNKI) database for clinical studies on herbal treatments including Pinellia ternata for GERD, from January 1st, 2015 to September 30th, 2019. We evaluated the risk of bias using Cochrane's risk of bias to confirm the quality of the 37 selected documents. Results: The 37 papers included high-dose and middle-dose Pinellia ternata groups. The outcome measures included treatment effectiveness rate, symptom comparisons, and endoscopy effectiveness rates or scores. In both groups, most studies showed significant improvement in the treatment group compared with the control group. The meta-analysis revealed a higher treatment effectiveness rate and a lower recurrence rate in the treatment group than in the control group. Conclusions: Comparing the treatment effect between the two groups was difficult due to the low quality of most studies. However, the results suggest that herbal remedies including Pinellia ternata showed statistically significant improvement in GERD compared to control groups.

• Proceedings of the KIPE Conference
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• 2001.10a
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• pp.184-188
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• 2001

In this paper, a new fully digital control method for single-phase UPS inverter, which is based on the double control loop such as the outer voltage control loop and inner current control loop, is proposed. The inner current control loop is designed and implemented in the form of internal model control and takes the presence of computational time-delay into account. Therefore, this method provides an overshoot-free reference-to-output response. In the proposed scheme, the outer voltage control loop employing P controller with resonance model implemented by a DSP is introduced. The proposed resonance model has an infinite gain at resonant frequency, and it exhibits a function similar to an integrator for AC component. Thus the outer voltage control loop causes no steady state error as regard to both magnitude and phase. The effectiveness of the proposed control system has been demonstrated by the simulation and experimental results respectively.

• Journal of Families and Better Life
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• v.20 no.6
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• pp.11-24
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• 2002

The purpose of this study is to develop a Marriage Enrichment Program that can be applied to the actual lives of Korean families and couples, as well as adopted in family welfare programs. For this study, a quasi-experimental group design was employed and pre- and post- tests on Internal-External Control, Couple Communication, and Marital Satisfaction were conducted. Experimental participants consisted of six volunteer couples who responded to an advertisement by the Chonbuk Family Counseling Center printed in a daily newspaper. The experimental group received two hours of education on marital relationship enhancement every week for eight weeks. The control group received no such treatment. The effectiveness of the education was measured by Wilcox matched pair test, using a SAS program, as well as by the self-report of the participants. The results show that there was statistically significant improvement for the experimental group in all three areas of marriage-- internal control, couple communication, and marital satisfaction. In addition, the participants'evaluations were generally positive about the program. The participants reported that it was most helpful to learn through the educational program that individuals differ in basic needs and that they should not force personal beliefs on others. They also reported that their understanding of their spouse improved.

• International Journal of Contents
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• v.6 no.4
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• pp.79-89
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• 2010

In recent years, IT organizations are in the process of introducing IT Governance as the concept and measure of transparency, accountability and effectiveness of IT activities and control for managing governance processes. In this paper, the influential factors for IT organizations to adopt COBIT(The Control Objectives for Information and related Technology) which is a typical framework for effective IT Governance execution were classified and analyzed empirically into internal and external factors. Internal factors were designed based on influential factors in the theory of innovation diffusion, and external factors were designed based on influential factors from outside certification which were absent in COBIT and expertise support from the outside. The result of this study showed that understandability, transition and effectiveness which were internal factors had no effect on COBIT introduction, and only expertise support among certification and expertise support which were external factors had significant effects. This result shows that there are lack of COBIT supports and introduction in internal IT organizations. It is expected that the result of this study will allow strategic approach of COBIT adoption in future by verifying influential factors of COBIT introduction within IT organizations.

• Journal of Korean Academy of Nursing Administration
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• v.13 no.2
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• pp.242-253
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• 2007

Purpose: The aim of this study is to examine the effectiveness of an computer-tailored intervention program to promote breast-feeding. Method: A quasi-experimental design was used assigning forty pregnant women to the experimental group (computer-tailored intervention condition) and the control group (no-intervention control condition). Thirty-three participants completed pretest and posttest questionnaires and 19 participants assigned to intervention condition received personal feedback tailored by computer program. Result: Participants in the experimental group showed higher mean score of 'perception of the importance of breast-feeding'. Significant differences in internal health locus of control was found between the participants in the experimental group and the control group. Participants in the experimental group exceeded controls on intention of breast-feeding. Participants in the control group more often felt that the length of program contents they received was somehow longer. Conclusions: The use of a computer-tailored intervention improved the perception of the importance of breast-feeding and the internal health locus of control. The intention of breast-feeding was increased through the personal feedback tailored by computer even though participants felt that the length of program contents of tailored feedback was not longer.

• Transactions of the Korean Society of Mechanical Engineers A
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• v.28 no.8 s.227
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• pp.1075-1086
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• 2004

In this paper, Time Delay Control(TDC) for robot manipulators is analyzed and its problems are founded. In order to remedy the problems, the enhanced controller is proposed and analyzed. The effect of friction associated with TDC is reported and its cause is presented. Through the analysis, simulation and experiment, it is shown that the friction effect causes serious degradation in control performance and that it is a result of the error of Time Delay Estimation(TDE) in TDC. In order to remedy the problems, TDC combined with Internal Model Control(IMC) concept is proposed. The proposed compensator is effective enough to handle the bad effect of friction, and is so simple and efficient as to match positive attribute of TDC. The simulation and experimental results show the effectiveness of proposed controller against the friction of the robot manipulators.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.51 no.4
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• pp.175-185
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• 2002

In this paper, a new fully digital current control method of UPS inverter, which is based on an internal model control, is proposed. In the proposed control system, overshoots and oscillations due to the computation time-delay are compensated by explicit incorporation of the time-delay in the current control loop transfer function. The internal model controller is adopted to a second order deadbeat reference-to-output response which means that its response reaches the reference in two sampling time including computational time-delays. That is, the average current of filter capacitor is been exactly equal to the reference current with a time lag of two sampling intervals. Therefore, this method has an essentially overshoot free reference-to-output response with a minimum possible rise time. The effectiveness of the proposed control system has been verified by the simulation and experimental respectively. From the simulation and experimental results, the proposed system is achieved the robust characteristics to the calculation time delay and parameter variation as well as very fast dynamic performance, thus it can be effectively applied to the power supply for the critical load.

• The Journal of Internal Korean Medicine
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• v.21 no.5
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• pp.765-771
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• 2000

Objectives : To evaluate the pain control effect of combination treatment of Oriental Medicine on patients who suffered from thalamic pain syndrome caused by thalamic stroke. Methods : We reviewed the medical records and brain imaging data of all patients with thalamic stroke from September 1998 to August 2000 who visited to Department of Oriental Internal Medicine, National Medical Center. We evaluated clinical features of thalamic pain syndrome, including incidence, onset interval from stroke, nature, pain distribution, and assessed the pain control effect of combination treatment by Visual Analog Scale(VAS). Results : 64 cases were selected under the inclusion criteria, and 17 patients(26.5%) with thalamic pain syndrome were identified from 64 thalamic strokes. VAS proved combination treatment effective to control pain of thalamic pain syndrome. In 12 cases(70.5%), pain onset was within the first week poststroke. The patients with allodynia were 6(35.3%). In 12 cases(70.5%), the lesion was mainly located in the posterolateral areas of thalamus. Conclusion : We conclude that combination treatment of the Oriental Medicine modalities have pain control effectiveness on thalamic pain syndrome.(t=-5.47, p=0.0001)

• Journal of the Korean Society for Precision Engineering
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• v.12 no.8
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• pp.168-175
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• 1995

A robust speed control algorithm under disturbances and reference change is developed using the self tuning control method in order to control induction motors. The method incorporates the concepts of the well known internal model principle and the annihilator polynomial. The effectiveness of the method is evaluated through the speed control experimental results of an induction motor for refernce change and arbitrary distrbance.