• Journal of the Korean Society for Geothermal and Hydrothermal Energy
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• v.12 no.4
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• pp.8-14
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• 2016

In this study, the effects of prediction and reset control of outdoor air temperature on energy consumption for central heating system are researched by using TRNSYS program package, and the control performances with the suggested methods of prediction and reset control of outdoor air temperature are compared with the existing ones. As a result, the value of coefficient of determination $R^2$ for the predicted outdoor temperatures is improved and the suggested control method shows maximum 21.8% energy saving in comparison with existing control ones.

• Journal of Korea Society of Digital Industry and Information Management
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• v.6 no.4
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• pp.251-265
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• 2010

Recently, with increasing interest in the subject of interfirm relationship mechanism, some information systems researchers point out that existing outsourcing theories are limited in explaining the choice of governance mechanisms in interfirm relational exchanges. Recognizing the importance of trust-commitment, this study focuses on the relationship of between control mechanism and commitment. Especially the role of trust as mediator is mainly researched. A mediation model was suggested on the basis of theoretical linkages from prior relevant studies. The research model was empirically tested with 73 IS outsourcing projects. The findings have significant impactions for further research and practice. Findings are as follows: First, outcome control, process control, social control had positive effects on trust and commitment. Second, inter-organizational trust played as a partial mediator on the relationship between control mechanisms and commitment. Based on these findings, the implication and the limitation of the study were presented including some directions for future studies.

• The Journal of Internal Korean Medicine
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• v.15 no.2
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• pp.240-248
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• 1994

These studies were carried out to investigate the effects of Macmundongtang extract on the inhibitory contractile action of acetylcholine in control rat. The results of these studies were as follows: 1. Contractile force of acetylcholine from tracheal smooth muscle in control rat was significantly inhibited by Macmundongtang. 2. Inhibition contractile action of acetylcholine pretreated ACH $ED_{50}$ in control rat was significantly changed. 3. Dose-response of acetylcholine pretreated Macmundongtang in control rat was not significant. 4. Inhibitory contractile action of acetylcholine pretreated propranolol in control rat was not significantly changed by Macmundongtang. 5. Inhibitory contractile action of acetylcholine pretreated methylene blue in control rat was significantly changed. 6. Contractile force of acetylcholine pretreated indomethacin from trachea smooth muscle in control rat was not significantly inhibited by Macmundongtang.

• Transactions of the Korean Society of Mechanical Engineers
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• v.12 no.6
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• pp.1282-1289
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• 1988

It has recently shown that a solenoid valve can be utilized in a hydraulic position-control system by discontinuous control methods. The objective of this study is to investigate the effects of solenoid valves on the response characteristics of a hydraulic position-control system by applying two kinds of discontinuous control methods i.e., Simple On-Off(SOF) and Pulsating On-Off(POF) controls. Three types of solenoid valves i.e., low-frequency, closed-center type(LF/C), low-frequency, tandem-center type(LF/T) were used in this study. Effects of loading conditions and control parameters on the response characteristics were experimentally examined and compared each other. Pressure transients within the actuator were also studied.

• Journal of Korean Critical Care Nursing
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• v.3 no.2
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• pp.13-22
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• 2010

Purpose: This study was intended to examine the effects of educating the Ventilator-Associated Pneumonia (VAP) control for the nurses working in the intensive care unit (ICU). Methods: The study was conducted using one group pre-post test research design. The education on infection control was provided to 31 nurses working at the medical and surgical ICUs. A comparison was then made in terms of the degree of performing infection control a month before, two weeks after, and three months after the education respectively. The incidences of VAP at the medical and surgical ICUs were compared for 3 months before and after the education. Results: The average performance scores between before and after the education showed statistically significant differences. Compared to three months before, the incidence of VAP after the education was decreased slightly from 5.48 to 1.88 per 1,000 ventilator days. Conclusion: It is necessary to continue the VAP education, specifically on infection prevention and control methods and the consistent evaluation of its effects as well as the development of standardized educational program should be approached extensively in further studies.

• The Journal of Korean Medicine
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• v.17 no.2 s.32
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• pp.178-190
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• 1996

This experiment was performed in order to study the effects of Haepyoyijintang on the pulmonary injury caused by $SO_2$. Healthy adult male rats weighting about 250g were divided into 4 groups- the Normal group, the Control group, the group of Haepyoyijintang administration for 5 days after $SO_2$ gas exposure (Sample I ), and the group of Haepyoyijintang administration for 10 days before and for 5 days after $SO_2$ gas exposure (SampleⅡ). The results were obtained as follows; 1. In the total number of leucocyte, Sample I and Sample II decreased significantly compared with Control group. 2. In the erythrocyte sedimentation rate, Sample I and Sample Ⅱ decreased significantly compared with Control group. 3. In the lung weight, Sample I and Sample II decreased significantly compared with Control group. 4. In the lung TBA level, only Sample II decreased significantly compared with Control group. 5. In the tracheal glycoprotein level, Sample I and Sample II decreased significantly compared with Control group. According to the above results, Haepyoyijintang has significant effects on the pulmonary injury caused by $SO_2$ in rats.

• Korean Journal of Child Studies
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• v.35 no.1
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• pp.119-133
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• 2014

The purpose of this study is to examine the effects of time perspective, self-control and cellular phone addiction on academic procrastination, and to cellular phone addiction has any mediating effects in relation to the effects of adolescents' time perspective and self-control on academic procrastination. For this study, a survey was conducted with total 651 students in middle and high schools. Those who omitted responses or answered in ways which were otherwise invalid were excluded and finally, questionnaires responded to by 558 students were analyzed. Employing SPSS Win 12.0, average value, standard deviation, frequency analysis, Pearson's correlation analysis, stepwise multiple regression analysis, and simple linear regression analysis were used for the purposes of statistical analysis. In conclusion, first, explanations were made in order of future-oriented time perspective which is subordinate domain of view of time perspective, self-control, and cellular phone addiction. Second, it was found that cellular phone addiction has partially mediating effect on the relationships between future-oriented time perspective which is a subordinate area of adolescents' time perspective, and academic procrastination. Third, it was found that cellular phone addiction has partially mediating effect on the relationships between adolescents' self-control and academic procrastination.

• Journal of Families and Better Life
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• v.29 no.6
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• pp.27-39
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• 2011

The purpose of this study was to explore mediating effects of internal-external control between directors' servant leadership and teachers' emotional labor. The subjects of the study were 425 childcare teachers in Seoul, Gyeonggi province and Incheon in Korea. The statistics program used to analyze the data was SPSS(version +18.0). The statistics methods applied were the Pearson correlation coefficient, simple linear regression, and multiple linear regression. The major results of this study were summarized as follows: First, emotional labor and internal control caused by the servant leadership style were found to be positively correlated. Second, servant leadership affected the ability of the teachers to act naturally. These effects were mediated in part by the amount of internal-external control that was shown. Third, servant leadership affected the internal behaviors of the teachers. These effects were mediated in part by amount of the internal-external control that was shown.

• Journal of the korean veterinary medical association
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• v.17 no.1
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• pp.51-54
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• 1981

The study was conducted to investigate the effects of Fenbendazol(FBZ) for the control of Cysticercus cellulosae in Jeju native swine. The results abtained were as follows: 1. The swine (S-l) has been 0.1g FBZ/kg body weight for 14 days and slaughtered in

• THE JOURNAL OF KOREAN ORIENTAL ONCOLOGY
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• v.3 no.1
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• pp.99-128
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• 1997

In order to investigate the effects of Kyegyoksan on antitumor effects after Sarcoma 180 cells transplantation into the peritoneal cavity or left groin in mice, and immune depression in mice induced by methotrexate, the extracts of its herbal medicines were orally administered for 14 or 21 days. Experimental studies were performed for measureance of $IC_{50}$ in MTT assay, mean survival days, tumor and body weights for antitumor effects, delayed type hypersensitivity, hemagglutinine titer, hemolysin titer, rosette forming cells, interleukin-2 productivity, lymphocyte transformation, natural killer cell activity and phagocytic activity for immune responses in the immune depressed ICR mice, and SGOT, SGPT, BUN and creatinine for liver and kidney protective function in SO-rats. The results were obtained as follows: 1. From the results of MTT assay, the Kyegyoksan exstracts for SUN-1 and SUN-C4 were inhibited cell viability. 2. Mean survival time in Kyegyoksan-treated group was slightly increased with no effectiveness, as compared with the control group. 3. Tumor weight in Kyegyoksan-treated group was depressed with the statistical significance, as compared with the control group(p<0.01). 4. Body weight in Kyegyoksan-treated group was incresed with the statistical significance, as compared with the control group(p<0.05). 5. Delayed type hypersensitivity in Kyegyoksan-treated group was slightly incresed with no effctiveness, as compared with the control group. 6. Hemagglutinin titer in Kyegyoksan-treated group was incresed with the statistical significance(p<0.05), but hemolysin titer was slightly incresed with no effectiveness, as compared with the control group. 7. Rosette forming cells in Kyegyoksan-treated group was incresed with the statistical significance, as compared with the control group(p<0.001). 8. Interleukin-2 productivity in Kyegyoksan-treated group was incresed with the statistical significance, as compared with the control group(p<0.001). 9. Lymphocyte transfomation in Kyegyoksan-treated group was incresed with the statistical significance, as compared with the control group(p<0.01). 10. Natural killer cell activity in Kyegyoksan-treated group at E/T ratio 100 : 1 was incresed with the statistical significance(p<0.01), but at E/T ratio 50 : 1 and 10 : 1 was slightly incresed with no effectiveness, as compared with the control group. 11. Phagocytic activity in Kyegyoksan-treated group was slightly incresed with no effectiveness, as compared with the control group. 12. The levels of serum glutamic oxalacetic transaminase, serum glutamic pyruvic transaminase, blood urea nitrogen and serum creatinine in Kyegyoksan-treated group were not effective change, as compared with the control group. According to the above results, it could be suggested that Kyegyoksan have prominent antitumor effects, enhance both cellular and humoral immunity, and have no injury to liver and kidney functions.