• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.43 no.1
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• pp.62-71
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• 2015

Geostationary satellites use the thruster in order to control the location change and mount the suitable amount of liquid propellant depending on the operating lifetime. Therefore the lifetime of the geostationary satellite depends on the residual propellant amount and the precise residual propellant gauging is very important for the mitigation of economic losses arised from premature removal of satellite from its orbit, satellites replacement planning, slot management and so on. The propellant gauging methods of geostationary satellite are mostly used PVT method, thermal mass method and bookkeeping method. In this paper, we analysis the modeling of COMS(Communication, Ocean & Meteorological Satellite) bipropellant system for bookkeeping method and COMS GTO(Geostationary Transfer Orbit) injection propellant estimation using Monte-Carlo method.

• Korean Journal of Psychosomatic Medicine
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• v.30 no.1
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• pp.22-29
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• 2022

Objectives : In this study, we evaluate psychological stress, symptoms of anxiety and depressed mood and resilience which medical residents and interns perceived during COVID-19 event, then investigate the associations between stress and the symptoms and mediating effect of resilience on the associations. Methods : In this study, we made a self-reporting form to evaluate psychological stress with perceived stress scale (PSS), symptoms of anxiety and depressed mood with Hospital anxiety and depression scale (HAD), and resilience with Conner-Davidson Resilience Scale (CD-RISC). Medical residents and interns, who worked in a hospital during COVID-19 event, filled the self-reporting forms from july, 2020 to august, 2020. We conducted a Pearson correlation coefficient and a multiple regression to confirm association between psychological stress and symptoms of anxiety and depressed mood, then mediating effect of resilience. Results : The higher stress perceived, the more symptoms of anxiety and depressed mood were reported by medical residents and interns. The higher resilience is associated with lower stress and less symptoms of anxiety and depressed mood, which resilience is proven to mediate partially the association between stress and symptoms of depressed mood. Conclusions : This study shows that resilience has a partial mediating effects on the association between stress and psychological pathology especially depressed mood, given that medical residents and interns were under psychological distress during COVID-19 event. This suggests that resilience is the key for medical trainees to overcome the future crisis like COVID-19 event.

• Korean Journal of Childcare and Education
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• v.10 no.1
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• pp.131-146
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• 2014

The purpose of this study was to examine the effects of ego-resilience and professionalism awareness on occupational stress of early childhood teachers. The subjects of this study were 154 early childhood teachers working at day care centers and kindergartens. The data and information were collected through questionnaires. Correlation analysis and multiple regression analysis were performed on the collected data with the SPSSWin 18.0 statistics program. The following results were shown: First, in regards to the relationship between ego-resilience, professionalism awareness and occupational stress, there were high correlations among them. Second, ego-resilience of early childhood teachers had a greater influence on occupational stress. Third, professionalism awareness of early childhood teachers had an influence on occupational stress. Forth, ego-resilience and professionalism awareness of early childhood teachers had influences on occupational stress, and their explained variance was 28%. These results imply that the support systems shoud be prepared to improve positive thoughts and attitudes of early childhood teachers.

• The Korean Journal of Nuclear Medicine Technology
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• v.14 no.2
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• pp.45-49
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• 2010

Purpose: Several radiopharmaceuticals were used for cisternography. But recently, due to more short acquisition time, high resolution than other radiopharmaceuticals like In-111 DTPA, we were using Tc-99m DTPA in cisternography. Using of Tc-99m DTPA for intrathecal, was not officially recognised by the FDA. And there are matters of aseptic meningitis, muscular tetany, seizures by inappropriate radiopharmaceuticals handling. So, it is necessary to prevent adverse reactions while handling the radiopharmaceuticals using in cisternography. Therefore, this study aims to evaluation of usefulness and procedures for safety of radiopharmaceuticals in cisternography. Materials and Methods: Subjects were 12radioactive tracer vials using in cisternography in 2008 Dec. 16 - 2009 Dec. 30. (1) Radioactive tracer Vial test - We were measured NaPertechnetate radiation dose and volume, normal saline volume for dilution, source volume and dose activity for patient injection. And then, calculated mass of pure DTPA. (2) Bacterial endotoxin test - We performed pyrogen test using by negative/positive control vials which was added normal saline 0.2 mL and added normal saline 0.1 mL, Tc-99m DTPA 0.1 mL in test control vial. And then, reacted by digital hot plate in $37.5^{\circ}C$ for 1 hour and compared of gel-clot in each control vials. (3) Compliance safety procedure - We were checked safety issues and wrote out a safety procedure exam sheet. Results: (1) Radioactive tracer Vial test - Mass of DTPA per dose for patient injection (mg) was 0.88 (mg) on average, and Mass of DTPA per volume for patient injection (mg) was 0.74 (mg) on average. (2) Bacterial endotoxin test - All control test vials showed negative reactions. (3) Compliance safety procedure - We were checked safety issues and wrote out a safety exam sheet in all the exams. So, there were no adverse reactions. Conclusion: We could examine easier to safety tests using by Techscan - DTPA (Mallinckrodt): CaNa3. Each test results were passed the safety tests and there are no adverse reactions. The use of Tc-99m DTPA for cisternography, always has been become an issue. Since it has occur adverse reaction while examine the cisternography using by Tc-99m DTPA, it needs to set up the 'Standard Operating procedures'.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• autumn
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• pp.363-366
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• 2002

The advanced construction technology endorsement system(ACTES) has used the improper evaluation criteria. Because of its insufficiency of quantitative evaluation, it is difficult to attain the objective and fairness. This study used a survey to investigate a actual condition of ACTES. The survey found that ACTES needed a evaluation criteria and a quantitative evaluation method. In addition, This study proposes the evaluation model that uses a discriminant function. The model process consists of several phases that are brain storming, t-test and discriminant function analysis.

• Journal of the Korean Society of School Health
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• v.11 no.2
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• pp.229-241
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• 1998

Because sexual awareness is changing, I have tried to classify university students' attitudes toward sex. This study examined male and female university students and used a Q-method to measure these attitudes. Out of a total of 202, 33 statements were abstracted, and a P-sample of 1-7 parties consisting of 26 persons were studied. I Q-sorted the statements with a standard of 9 points for normal distribution and analyzed the data by means of a Principal Component Analysis with a Quan PC Program. According to the result of this research, university students' attitudes toward sex are divided into three types. Type 1 are called open-minded open: They may have a surgical abortion in case of an unexpected pregnancy and sexual intercourse occurs when a man and woman feel love for each other. They don't see sexual intercourse as a means reproduction nor virginal purity as unconditional. It is remarkable that these students regard sexual intercourse as a natural thing and sex as a basic desire of human beings. In short, they show an open-minded attitude toward sex. Type 2 are supporters of virginal purity; They regard virginal purity with great importance. They insist that both man and woman should be chaste but that sexual intercourse before marriage is unfavorable only to the woman. They do not believe in sexual intercourse without love and emphasize purity in sex education. Differen from type 1, they are very negative about surgical abortion. Type 3 experss love through sex. They belive that sexual intercourse makes a couple happy and a way to express their affection for each other. In other words, the relationship between man and woman is improved through sexual intercourse. They do not think of sexual intercourse in terms of childbirth.

• The Journal of the Korea Contents Association
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• v.12 no.10
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• pp.54-62
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• 2012

This study aims to examine the opposant of conventional images of women against heroines in the genre of TV melodramas having been produced since 2005. To attain the goal, it investigates the alteration of female opposant types in 27 dramas with female opposant in them among the melodramas positioned high in terms of ratings from 1992 to 2011. As a result, first, after 2005, docile tendencies increased in female opposant. Second, pure and feminine appearance increased. Third, women with conservative sexual consciousness increased. Fourth, in relationships with others, they showed more dependent tendencies. Although female opposant in the past were characterized by strong character, unfeminine attitudes, or dressing up the outside, after 2005, female opposant tended to show characteristics more like heroines' in the past. This research result implies that after 2005, there has been alteration in the paradigm defining female image.

• The Journal of the Korea Contents Association
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• v.20 no.6
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• pp.211-219
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• 2020

The purpose of this study is to examine the moderating effects of perceived organizational justice on the associations between personal job-organizational fit and job loss perceived by social workers. The survey was conducted on social workers in Gwangju. This study conducted descriptive statistics, correlation analysis, hierarchical multiple regression analysis using SPSS 24.0 as an analysis method to verify the main assumptions of this study. The analysis showed that First, The degree of personal job-organizational fit was shown to be slightly higher than normal. perceived organizational justice was investigated as two sub-factors, and distributive justice was shown to be slightly lower than normal and procedural justice to be higher than normal. The degree of job loss was also investigated at a lower level than normal. Second, personal job-organizational fit had negative(-) effects on job loss and the effects were moderated by perceived organizational justice.

• Journal of Korea Society of Industrial Information Systems
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• v.22 no.2
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• pp.123-142
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• 2017

After the Enactment of Support of Social Enterprise in 2007, Cultivation of Social Enterprises has been Promoted in Eearnest these days. This Study Attempts to Examine the Factors that Affect the Sustainability of Social Enterprise, Which is the Current Policy Issue Regarding the Social Enterprise. For this Purpose, the Study Developed a Research Model that has Antecedent Factors(strategy, managerial capability, business environment and social entrepreneurship) of Social Enterprise as an Independent Variable, Performance as Parameter and Sustainability as a Dependent Variable. Using this Model, the Study Established Hypotheses that Examine the Performance and Antecedent Factors of Sustainability of Social Enterprise. According to the Hypothesis Testing Results, the Economic Performance Showed Partial Mediating Effect on the Impact of Strategy, Management Capacity, Business Environment and Social Entrepreneurial Spirit on the Sustainability. As for the Social Performance, Strategy, Management Capacity and Social Entrepreneurial Spirit Turned out to Partially Mediate the Impact on Sustainability. Meanwhile, The Social Performance did not Show Mediating Effect in the Impact of Business Environment on Sustainability.

• The Journal of the Korea Contents Association
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• v.13 no.6
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• pp.361-369
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• 2013

The purpose of this study was to investigate the level of spirituality and stress of clinical practice and to identify the relationship of variables among nursing students. Data were collected from 203 nursing students using self-report questionnaire composed of demographic characteristics and two scales including spirituality and stress of clinical practice. Data were analyzed by frequencies, t-test, ANOVA, Pearson's correlation coefficients using the SPSS program. The mean score for spirituality and stress of clinical practice were above medium level, with the value of 3.18 and 3.42 out of 5 respectively. There were significant mean differences in spirituality according to religion and satisfaction on major while those in stress of clinical practice according to sex and satisfaction on major. Significant negative correlation between spirituality and stress of clinical practice was found. In conclusion, to reduce clinical stress in nursing students, it is necessary to develop and apply educational program for spiritual improvement.