• Journal of radiological science and technology
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• v.44 no.6
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• pp.679-688
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• 2021

This study is a questionnaire about the lesson environment that radiation major students prefer in a non-face-to-face live online lesson environment for a total of 133 students, 65 second graders and 68 third graders who are enrolled in the department of radiology at a university located in the Seoul metropolitan area. And checked the satisfactory level by grade. The questionnaire consists of three categories: 1st real-time non-face-to-face lectures, 2nd professor lectures, and 3rd corona lectures. A total of 14 questions, with multiple choice and descriptive response methods. As an evaluation method, in the case of a multiple-choice question, the average was calculated using a 5-point Likert scale. As a result of conducting the independent sample T-test of the SPSS program, the response by grade was P > 0.05, and no significant result was shown by the contents of the questionnaire survey of the second grade. As for the lecture method of the department of radiology after the end of Covid-19 virus, it is better to promote face-to-face lessons in radiation training subjects and non-face-to-face real-time education in subjects centered on radiation theory.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.28 no.4
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• pp.302-309
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• 2002

In order to improve the success rate of implants, various implant designs have been developed. Although there have been enough efforts to handle the surface of the implant with careful choice of material and mechanics so that the bone and the implant can be tightly joined together, they have still failed to play the role of periodontal ligaments of the natural teeth in the past. The role of periodontal ligaments is very important since it can improve the initial stability of implant by absorbing the impacts. The purpose of this study is, thus, to test the possibility of alleviating the impact when the surface of the implant was coated with chitosan, a natural polymer, and making sure that the coated material stayed on. Then, the condition of newly developed bone formation and the degree of inflammation in response was closely observed in the surface level. In the main experiment, Chitosan coated implant ($3.3mm{\times}7mm$) was implanted on both the right and the left side of rabbit's femur. The animals were each sacrificed on the $1^{st}$, $2^{nd}$, $3^{rd}$, $7^{th}$, $14^{th}$, $21^{st}$ and 28th day. The process was observed under an light microscope after the Toluidin Blue staining. From the experiment, it was found that the chitosan was evenly distributed on the surface of the screws, and the implant was adjoined with adjacent bone. There was a sign of inflammation on the $3^{rd}$ day, but on the $14^{th}$ day, the formation of woven bone and newly formed bones were noticed. Also, chitosan filled the gap was formed between the implant and the newly formed bone. The implant, the chitosan and the newly formed bone were forming one unit as a result. Therefore, it was found that chitosan coated implant could absorbe the impact in the initial stage of implant.

• The Journal of the Korea Contents Association
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• v.14 no.6
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• pp.367-384
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• 2014

This study addresses an empirical issue which has been received little attention in the contemporary finance literature: To identify any financial determinants of the profitability indices for the firms belonging to the Korean chaebol. Three hypotheses of concern were postulated and tested for the sample firms covering the periods of the pre-and post-financial global crises. Regarding the results on the 1st hypothesis test of characterizing any financial profiles for the firms (belonging to the chaebols) by estimating a legitimate panel data model: the present study found the statistically significant relationships of the explanatory variables (BVLEVl, MVLEVl, MV/BV, RISK, FCFF and FOS) with the book-value based profitability ratio: while the market-valued profitability index was explained only by BVLEV2. Regarding the 2nd hypothesis test for the profitability of the sample firms at the industry level: the chaebol firms in the chemical and the food industries overall positioned themselves into the top ranks in order, which was tested by the ANCOVA and the Tukey multiple comparison procedure. Finally: on the 3rd hypothesis test for the 'adjusted' Dupont system, only two such as the 'operating margin' and the 'asset turnover' showed their significant effects between the chaebol firms and their counterparts in both the (parametric) independent samples t-test and the (nonparametric) Wilcoxon-Mann-Whitney statistics.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.22 no.3
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• pp.80-87
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• 2021

This study examined the influencing factors of learning satisfaction for real-time online adult nursing classes to provide basic data for the design and operation of online lectures in nursing subjects and help prepare a new educational paradigm. The subjects of the study were 105 3rd graders taking real-time online adult nursing classes, and data collection was conducted through structured online questionnaires from June 20 to July 30, 2020. The subjects were analyzed using a t-test, one-way ANOVA by Scheffe test, Person's correlation coefficients, and Hierarchical multiple regression analysis. The results showed that the learning flow was 3.07, academic engagement was 3.46, and learning satisfaction was 3.88. Learning satisfaction showed a positive correlation with learning flow (r=.41, p<.001) and academic engagement (r=.56, p<.001). In addition, the factors influencing the learning satisfaction of the subjects of this study were academic engagement (��=.47), very high in the level of interest in adult nursing classes (��=.21), and high (��=.20) followed by 34% (F=14.53, p<.001). Therefore, the learning outcomes of nursing students and the effective achievement of their learning goals are expected by developing plans and teaching methods for active participation in classes.

• Journal of Korean Academy of Nursing
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• v.4 no.3
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• pp.81-91
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• 1974

The purpose of this study was to investigate the level of obstetric knowledge of pregnant women and postpartum mothers, and to contribute the data to community health teaching program as well as maternity nursing. 385 pregnant women and postpartum mothers visited at or admitted to Seoul Adventist Hospital were sampled. The results of the study were as follows. 1. 97.9% of the subjects were between the age of 21 to 35, most of them (82.9%) were housewives with high school education and with a middle class family background. 2. The first symptoms of pregnancy were amenorrhea (70.4%), nausea & vomiting (23.9%), change of skin color (1.6%). 3. 77.9% of the subjects did not know how to deal with morning sickness. 4. 52.9% did not know when the sex determination of the fetus-occurs. 5. Concerning the fetus position; 77.1% of them believed it lies head down. head up (12.0%). and not knowing (10.9%). 6. 73.2% recognized the need for a well balanced food during pregnancy. 7. As to the dangerous symptoms during pregnancy: vaginal bleeding was considered the 1st, edema, the and, continuous abdominal pain, the 3rd. 82% of them would confer with physician in case of vaginal bleeding. As to the type of activities restricted by pregnancy: hard exercise was considered first, travel the second, and coitus during 1st and last trimester of pregnancy the 3rd. 8. 82.4% of them visited antenatal clinic at the second or third month of amenorrhea and 88.5% realized the regular physical examination imperative. 9. The purpose of urine test was recognized correctly by 44.7%, blood test: 89.4%, B. P. and weight check ; 69.9%. 10. The need of breast care during pregnancy was recognized by 76.9% of the subject. 11. 75.8% realized that prenatal exercise was needed. The higher the education the better the understanding of the need for it before delivery. 12. The concept of postpartum period was understood correctly by 54.4%. 13. The state of uterus after delivery was understood correctly by 49.1% only. 14, Regarding the management of colostrums: 48.3% knew it was to feed infants, and it was to squeeze and discard 43.4%. 15. Dealing with postpartum exercise; 67.8% answered it was needed, 9.1% not needed, not heard about 23, 1%.

• Journal of the Korean Society of School Health
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• v.14 no.1
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• pp.131-143
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• 2001

The primary aim of this dissertation is to contribute to the improvement of methods in physical examination by providing quality information for the current school system and advice for improving status. Present status, controversial points and possible remedies in physical examination were analyzed on a frequency and percentage basis. An $x^2$-test was used to verify the statistics between the results from the examination and each variable. In case of multiple categories of variables, an $x^2$ cs was adopted. Chronological data as well as both total and sampling physical examination data verified the statistics using an $x^2$-test. This thesis is based both on the data from middle school health care specialists in Gyunggi Province and on the analysis of physical examinations reported from local schools to the municipal education agency from 1997 to 1999. The results of the study are as follows: First, according to the survey, only 29.0% of the total schools had their school doctors examine all the students while most of the educational institutions failed to implement the whole process of physical examination on the list. It also turned out that the more students the schools have, the lower the rate of implementation of physical examination by school doctors(p=0.014). Second, the average time a school doctor spends for checkup turned out to be approximately 1.7 minutes per student This means that the quality of the physical examination is not guaranteed in the process. Third, 47.7% of those surveryed say that a dental examination was performed, each taking 21.24 seconds on average. In addition, it shows that some 31.5% wanted to have a task force team for dental checkups at the local health center. Given the fact that dental caries among students is progressively on the rise, the dental health centers that are now set up in some elementary schools should be expanded to cover the whole educational institution in order to raise awareness of the importance of dental care. Fourth, 48.5% of those surveyed say that a comprehensive physical examination should be adopted to promote the health of high schoolers. Since it takes a lot of public funds to implement a comprehensive method, it is essential to make sure that in-depth studies should be based on the frequency and methods of physical examination. Fifth, regarding such diseases among 3rd year middle school students in 1999, statistics shows that there was a slight difference in the prevalence rate of color blindness, and allergic diseases for male students ; and color blindness, hearing disturbance and allergic disease for female students. For those items, however, it is too little to say that there is a significant difference and accordingly it is assumed to be a problem of the measuring process. Sixth, the result of analysis on the sample physical examination and the total physical examination of the year 1999 shows as follows: For male students in the 3rd year of middle school, a slight difference appeared to those students in 11 items including eye problems and eye disease, otitis media, tonsillar hypertrophy, spinal shape, respiratory urinary allergic disease and other abnormal diseases(p<0.05). Particularly, the prevalence rate between students with and without disease was shown to be two times more in the following: eye problems, otitis media, tonsill hypertrophy, allergic diseases, etc. For female students in the 3rd year, prevalence rate showed little difference in 14 items(p<0.05). For items including eye problem, otitis media, tonsill hypertrophy, allergic disease, etc. it was shown that the rate was two times more between students with and without diseases. Physical examinations under the current school system are not producing any fundamental results for the health of the students. Methods and results are not trustworthy. Accordingly, a drastic overhaul of the current practices is needed in frequency, methods and items on the list in order to promote the health of the students. Cost-benefit studies as well as political considerations to ensure the development of efficient methods for physical examination are urgently needed at this moment.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.716-724
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• 2021

The purpose of this study is to examine the effect of coded education on creative problem solving ability on academic high school students. The subjects of the study were 24 students (14 male, 10 female) in the 1st to 3rd grade students voluntarily desiring coding education at the 'J' high school in Chungju, Chungcheongbuk-do. For the experimental group, the intervention program was conducted 10 times a month for 5 months. In the intervention program, pre and post test were conducted to investigate the effects of creative problem solving ability by using the scratch program. The results of the study are as follows. First, after examining the creative problem solving ability of the experimental group after the coding training, it was statistically significant as the average score increased. Second, coding education was suitable for achieving the sub-goal of the creative experience activity of' increasing the ability to reasonably and creatively solve everyday problems'. In particular, it was found that it is effective in improving self-confidence and independence.

• Journal of Korean Medicine Rehabilitation
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• v.19 no.1
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• pp.39-55
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• 2009

Objectives : This study was designed to evaluate effects of electroacupuncture and Cervi Pantortichum Cornu pharmacopuncture on pain and nerve regeneration after crush injury of sciatic nerve in rats. Methods : We divided the subjects into 5 groups : control group, acupuncture treated group, electroacupuncture treated group, Cervi Pantortichum Cornu pharmacopuncture treated group, electroacupuncture and Cervi Pantortichum Cornu pharmacopuncture group. Hot plate test and degree of Substance P antibody in each group were observed at the 1st, 2nd, 3rd and 5th day. Sciatic function index and change of BDNF immunoreactivity had been estimated at the 7th, 14th, 21st day respectively. Atrophy of the gastrocnemius at the 21st day was observed. Results : All the experimental groups showed significant changes in hot plate test, degree of Substance P antibody, sciatic function index and change of BDNF immunoreactivity compared with control group. Especially, when electroacupuncture and Cervi Pantortichum Cornu pharmacopuncture used together, results were more effective than other groups. Recovery of the gastrocnemius was also the same. Conclusions : It is suggested that electroacupuncture and Cervi Pantortichum Cornu pharmacopuncture may play a significant role on pain decrease and nerve regeneration after crush injury of sciatic nerve in rats and these two treatments could be more effective when used together.

• Journal of the Korea Institute of Building Construction
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• v.8 no.6
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• pp.123-129
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• 2008

The purpose of this study is to test performances of 14 types of root barrier materials by applying testing plant: and soils suitable for weather and natural features of Korea. For testing Plants, Plioblastus pygmaed Mitford A and Pyracantha angustifolia have been selected. For testing soil, mixture of pearlite and peat moss in 3:1 ratio Testing container has been fabricated with duplicated structure having inner and outer containers. And the outer container has 2 hinges on its side wall to allow opening and closing. Wet rock wool with 50mm in thickness has been inserted between inner and outer containers to allow root to penetrate through root barrier material and continue to grow. We planted 12 Plioblastus pygmaed Mitford A. and 4 Pyracantha angustifolia per one testing container. Three testing samples have been made for 1 type of root barrier material, which become a total 42 specimens. Planted testing samples have been installed within the greenhouse, which will be observed regularly for 2 years from now on. We started test from July 11, 2008 and had performed intermediate observations every month for initial 3 months. From the 3rd intermediate observation on Sept. 18, we confirmed that 6 types of roe barrier materials have penetrated roots. Even though two types of them have been generally used as root barrier materials for roof planting system, all of three testing samples have a lot of penetrated roots. This result proves that it is not reasonable to introduce testing methods of root barrier from Europe. USA or Japan.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2008.11a
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• pp.245-249
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• 2008

The purpose of this study is to test performances of 14 types of root barrier materials by applying testing plants and soils suitable for weather and natural features of Korea. For testing plants, Plioblastus pygmaed Mitford A. and Pyracantha angustifolia have been selected. For testing soil, mixture of pearlite and peat moss in 3:1 ratio(volume). Testing container has been fabricated with duplicated structure having inner and outer containers. And the outer container has 2 hinges on its side wall to allow opening and closing. Wet rock wool with 50mm in thickness has been inserted between inner and outer containers to allow root to penetrate through root barrier material and continue to grow. We planted 12 Plioblastus pygmaed Mitford A. and 4 Pyracantha angustifolia per one testing container. Three testing samples have been made for 1 type of root barrier material, which become a total 42 specimens. Planted testing samples have been installed within the greenhouse, which will be observed regularly for 2 years from now on. We started test from July 11, 2008 and had performed intermediate observations every month for initial 3 months. From the 3rd intermediate observation on Sept. 18, we confirmed that 6 types of root barrier materials have penetrated roots. Even though two types of them(EDPM Sheet, Polyethylene Sheet) have been generally used as root barrier materials for roof planting system, all of three testing samples have a lot of penetrated roots. This result proves that it is not reasonable to introduce testing methods of root barrier from Europe or Japan.