• Journal of the Korean Society of Propulsion Engineers
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• v.13 no.1
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• pp.1-9
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• 2009

As a result of the study on a number of the works, published in Russia, the methodical aspects of experimental improvement on working capacity of LRE (Liquid Rocket Engine) are reviewed. In the article, on the basis of the experience of Russia and USA, the special features of experimental improvement on working capacity of LRE and the methods of its rational implementation formulated. The organizational and technical solutions of experimental improvement on working capacity of LRE for achieving the required level of the reliability and decreasing the material expenditures are presented in the article. These suggested solutions can be used for the development of LRE.

• The Journal of Korean Physical Therapy
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• v.24 no.5
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• pp.355-361
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• 2012

Purpose: The purpose of this study was to evaluate the effectiveness of pulmonary rehabilitation on lung function and fatigue in persons with chronic obstructive pulmonary disease (COPD). Methods: Thirty one persons with COPD participated in this study. Four groups were allocated as follows: experimental group 1 (under 10 years of the post-disease period), control group 1 (under 10 years of the post-disease period), experimental group 2 (over 10 years of the post-disease period), and control group 2 (over 10 years of the post-disease period). Results: Forced expired volume in one second (FEV1) % pred and lactic acid showed improvement in experimental group 1 and experimental group 2 after training. Control group 1 and control group 2 did not show improvement of FEV1% pred and lactic acid after training. However, FEV1% pred and lactic acid in experimental group 1 were not significantly different, compared with the experimental group. Conclusion: Results of our study suggest that implementation of a pulmonary rehabilitation program resulted in improvement of lung function and fatigue in persons with COPD not related to the post-disease period.

• Korean Journal of Occupational Health Nursing
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• v.18 no.2
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• pp.242-251
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• 2009

Purpose: To confirm the effect of tailored life style improvement program, provided by occupational health nurse for hypertensive workers on their blood pressure, self-efficacy, and life style changes in workplace. Method: The experimental and control group of thirty subjects each were randomly assigned for those who agreed to participate in the study among the pre-hypertensive workers. The tailored life style improvement program was provided to the experimental group and conducted once a week for 8 weeks. This program was composed of exercise and low salt diet to control high blood pressure and weight, and the measurement of carbon monoxide for non-smoking inducement. Result: In the experimental group, the systolic and diastolic blood pressure significantly decreased while self-efficacy increased after the program compared to the control group. Smoking and drinking habits of the experimental group were significantly decreased whereas exercise and nutritional habits were significantly improved compared to the control group. Conclusion: The tailored life style improvement program provided by occupational health nurses for the hypertensive workers was positively affected on their blood pressure, self-efficacy and life style changes in workplace.

• Journal of the Korean Society of Earth Science Education
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• v.2 no.1
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• pp.33-40
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• 2009

The purpose of this study is to examine the effect of higher grades in elementary the science process skill and Academic Achievement by IIM. To verify research problem, the subject of this study were five-grade students selected from One classes of an elementary school located in Ulsan : the experimental group is composed of thirty-four students who were participated in IIM teaching model situation. During six weeks, the IIM learning-based instruction was executed in th experimental group. Post-test showed following results: First, the experimental group showed a significant improvement in the science process skill. We look into detailly this, the experimental group showed a significant improvement in the basis science process skill. In particular, The sub-factor 'Observation', 'Measurement', 'expectation' of the science process skill effects a significant improvement. Second, the experimental group did showed a significant improvement in the Academic Achievement. In conclusion, IIM teaching model was more effective on science process skill and Academic Achievement. However, since the study has a limit on an objet of the study and the applied curriculum, the additional studies need to be conducted with an extended comparative group and curriculum.

• Journal of the East Asian Society of Dietary Life
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• v.23 no.1
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• pp.44-52
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• 2013

This study investigated hepatic functional improvement and anti-fibrotic effects of water extracts of black tea. Male Sprague-Dawley rats were divided into four groups (normal, control, and two experimental subgroups: Ba, Bb) and observed for 3 weeks. Liver fibrosis in rats developed from carbon tetrachloride ($CCl_4$) administration, except for the normal group. Except for the normal and control group, the two experimental subgroups were fed water extracts of black tea. The food efficiency ratio significantly increased in the experimental group compared to the control group. The experimental group had a significantly lower liver weight compared to the control group. The ratio of liver weight to body weight was significantly lower in the experimental group than the control group. The levels of aspartate aminotransferase, alanine aminotransferase, alkaline phosphatase, blood urea nitrogen, and low-density lipoprotein-cholesterol in serum significantly decreased in the experimental group compared to the control group. The values of hydroxyproline and malondialdehyde in liver were even lower in the experimental group than the control group. In observations on liver histology, weaker inflammation and fibrosis were observed in the experimental group compared to the control group. In conclusion, water extracts of black tea help hepatic cells keep their functions, restraining and protecting the liver from impairments caused by $CCl_4$ administration, and can be effective as anti-fibrotic agents.

• Journal of Fisheries and Marine Sciences Education
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• v.18 no.2
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• pp.108-121
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• 2006

The purpose of this study is to develop and to test the program for the improvement of preservice teachers' critical thinking ability. The main research problems to achieve the purpose of research are as follows; first, is the program for the improvement of preservice teachers' critical thinking ability effective to improve the critical thinking skills of preservice teachers? Second, is the program for the improvement of preservice teachers' critical thinking ability effective to improve the critical thinking dispositions of preservice teachers? To evaluate the effect of the program, 30(15; experimental group: 15; control group) sophomores were selected in Pusan. The conclusions of this research are as follows; first, there is a significant difference between experimental group and control group for critical thinking skills test. Second, there is no significant difference between experimental group and control group for critical thinking dispositions test.

• Journal of the Korean Society of Food Culture
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• v.9 no.3
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• pp.251-257
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• 1994

The purpose of this study was to evaluate food sanitation training program for the improvement of food service operation in day-care centers. Subjects consisted of 55(experimental) and 25(control) foodservice employees and 33(experimental) and 20(control)directors. The results of this study can be summarized as follow: 1. The majority of child care directors(55.0%(control), 46.9%(experimental)) received food sanitation education but 70% of control and 75.7% of experimental group did not conduct any practical sanitation training for employees. 2. The employee's food sanitary practices of control and experimental did not show any significant difference at the pre-test level but only the experimental group showed a significant improvement at the post-test level. 3. The sanitary knowledge of food service employees between two groups did not show any significant difference at the pre-test level, but a significant knowledge improvement was observed at the post-test level such as food poisoning concepts and sanitary equipment maintenance only in experimental group. 4. Dicrectors' sanitary practices affected the employees' sanitary practices but directors' food sanitary knowledge did not have much influence on the employees' knowledge.

• Journal of Korean society of Dental Hygiene
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• v.23 no.1
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• pp.43-53
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• 2023

Objectives: We developed an integrated cognitive function improvement program comprising cognitive, emotional, and physical domains, and remotely applied it to middle-aged adults to investigate its effects on oral health, cognitive function, and mental health improvement. Methods: The experimental group underwent the program remotely, using the Zoom platform. A total of 24 participants were recruited and divided into 12 experimental and 12 control groups. The program comprised cognitive, emotional, and physical activities. The sessions lasted 90 min and were performed twice a week for 6 weeks from April to May 2022. Results: Cognitive function, arousal, physical, and mental stress were significantly improved in the experimental group after the intervention than at the baseline (p<0.05). Regarding oral health, tongue plaque decreased 1.34-fold (p<0.01) and saliva increased 1.04-fold (p<0.05) in the experimental group after the intervention than at the baseline. Moreover, the experimental group showed significant improvements in tongue plaque and saliva than the control group (p<0.05 for tongue plaque and p<0.01 for saliva). Regarding mental health, social support significantly increased 11.67-fold (p<0.05) in the experimental group than at the baseline. The experimental group also showed significantly improved social support than the control group (p<0.01). Conclusions: The non-face-to-face integrated cognitive function improvement program for middle-aged adults improved their cognitive function and oral and mental health. Based on these findings, this program may be a useful health program tool for middle-aged individuals.

• Korean Journal of Occupational Health Nursing
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• v.33 no.1
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• pp.12-25
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• 2024

Purpose: This quasi-experimental study used a non-equivalent control group pretest-posttest design with clinical nurses to develop a compassion improvement program and verify its effects on compassion competence and empathic communication. Methods: The Triandis Interpersonal Behavior model (Triandis, 1980) was used as a theoretical framework, and a compassion improvement program was developed based on the ADDIE model. The experimental treatment in the program was conducted for 120 minutes per session, once a week, for a total of six sessions. The data collection and research period ranged from September 7 to November 16. It involved a pre-survey of measured variables, six sessions of experimental treatment, a post-survey, and a follow-up survey in sequence. The collected data were analyzed using the statistical program SPSS/WIN 25.0 and then based on a t-test and repeated measures ANOVA to verify the effectiveness of the program. Results: Clinical nurses participating in the compassion improvement program showed improved compassion competence (F=8.00, p=.001) due to the cultivation of insight, sensitivity, and communication skills. In addition, the improvement in attentive listening (F=3.32, p=.024) indicated that the program was partially effective in empathic communication. Conclusion: The compassion improvement program for clinical nurses, which was developed in this study, is expected to be useful in nursing practice. In other words, the compassion improvement program may contribute to creating a positive atmosphere in the workplace for nurses and an empathic relationship between nurses and healthcare recipients through improvement in the compassion competence of nurses. If the compassion improvement program is continuously implemented as a facilitating condition, it will greatly help prevent the turnover of clinical nurses, assist them in adapting to hospital life, and enhance the quality of nursing care.

• The Korean Journal of Elementary Counseling
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• v.4 no.1
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• pp.123-150
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• 2005

The purpose of this study was to examine the effects of self-regulated learning program on the underachiever's academic achievement and academic self-concept. To achieve the purpose of study the research hypotheses were as follows : Hypothesis 1 : There will be significant differences in the improvement of academic achievement between the experimental group and the control group. Hypothesis 2 : There will be significant differences in the improvement of academic self-concept between the experimental group and the control group. To verify these hypotheses, 32 underachievers were selected from sixth grade students of 'D' elementary school located in Seoul. 16 students were allocated to the experimental group and 16 students were allocated to the control group. The experimental group trained with self-regulated learning program for 10 times(The length of each section was 60 minutes). The self-regulated learning program in this study was based on program by Kim. Yong-Soo(1998), The measurement instruments of the study were mathematics achievement test paper and academic self-concept test. To find out the difference, Pretest-posttest control design was used. Mean and standard deviations obtained from these tests were analysed with t-test. The major findings obtained through this study are as follows : First, self-regulated learning program was effective in improvement of academic achievement (p<.05). Second, self-regulated learning Program was not effective in improvement of academic self-concept. However, the experimental group showed significant improvement(p<.01) at academic self-concept and sub academic self-concepts (ability, achievement) in the data of pre-post test. it can be suggested that this program had positive influence on underachievers. Although it has some limitations, self-regulated learning program is effective to academic achievement and academic self-concept of underachievers, even though not significant, it has a positive t.