• The korean journal of orthodontics
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• v.26 no.5 s.58
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• pp.547-556
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• 1996

The purpose of this study was to evaluate the skeletal, dental and soft tissue profile changes following the face mask therapy in growing skeletal class III malocclusion patients. The fifteen patients with the good results were selected among the patients who visited the Department of Orthodontics in Seoul National University Hospital. The mean age was 10.63(range 7.25-13.25) years and the mean treatment duration was 9.84(range 2.00-27.00) months. Lateral cephalograms were taken just before and after face mask application. After tracing the cephalograms, thirty five items(twety angular and fifteen linear) were measured. The differences before and after the face mask therapy were compared statistically by the paired t-test(p<0.05). The results were as follows : SNA and Co-A(effective maxillary length) increased significantly after using the face mask(p<0.001), which reflects the orthopedic changes of maxilla. SNB and Co-Gn(effective mandibular length) also showed an increase(p<0.01), which may be a result of the strong growth trends of the samples. FMA, SN-GoGn and Y-axis angle increased significantly(p<0.01), which means the backward and downward rotation of the mandible. This positional change seemed to have compensated an increase of effective mandibular length. There was no statistically significant difference in angulation of upper and lower incisors between pre-treatment and post-treatment(p>0.05). In soft tissue profile, the upper lip was positioned anteriorly(p<0.01) after treatment and approximated to the normal standards.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2898-2907
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• 2013

The purpose of this study was to develop the creative thinking training program(CTTP) focused on a nursing case for registered nurses(RN) working at hospital, and to examine the CTTP's effects on nurses' creative thinking ability and disposition. This quasi-experimental study was conducted on the basis of pre and post-test design with a comparison group for nurses enrolled in registered nurse bachelor science degree program in a University located in Southern area of Korea. The 5 hour-CTTP, including 7 creative activity tasks related to a nursing case, was implemented on 35 RNs of the experimental group from November 21, throughout November 28, 2011. The 39 RNs were participated in this study as a control group. Pre-and post-tests were done with the questionnaire items of the Integrated Creativity Instrument for creative ability and creative disposition. There were significant differences in creative thinking ability(t=3.62, p=001) and creative disposition(t=2.91, p=.01) between the experimental and the control group. The CTTP, developed in this research would contribute to increasing creativity competency for registered nurses.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.12
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• pp.102-109
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• 2019

This paper describes the design of the circuit card assembly to eliminate the communication error on a servo control unit installed in the automated resupply vehicle K56. K56 is a weapon system that automates the supply and loading of ammunition on the K-55A1 self-propelled artillery. As the core item responsible for ammunition movement control, the servo control unit is required to have good communication stability and reliability, but the conventional unit has recognized a problem that communication error intermittently occurs, resulting in an emergency stop phenomenon. We analyzed the communication signal of the servo control unit and identified the failure cause of the circuit card assembly to solve this problem. In addition, the signal interference in data/address line of the circuit card assembly was confirmed through analysis of the failure cause, and redesigned to avoid the interference, such as adjustment of the distance between communication lines and position change. Finally, the proposed cause analysis and redesign were verified through the component of servo control unit and attachment test on K56. We expected these study results to be used as reference for the design of other similar items.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.3
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• pp.118-128
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• 2020

This descriptive study investigated the factors influencing on subjective happiness of senior nursing students. The participants were 235 nursing students in grades 3 and 4 in K city from May 1, 2019 to May 28, 2019. The data was collected using self-report questionnaires that contained items on subjective happiness, professional intuition, human relationship, major satisfaction, family health, and social support scale. The data was analyzed using descriptive statistics, Pearson's correlation coefficients, and stepwise multiple regression analysis with the SPSS 22.0 program. The subjective happiness of the subjects averaged 4.75±1.16 on the 7-point scale, and the subjective happiness according to the general characteristics of the subjects showed a significant difference in health status (F=6.826, p<.001). The most influential factors on the subjects' subjective happiness were health status (β=.177 p=.005), academic satisfaction (β=.138, p=.027), and family health (β=.268, p<.001), and the explanatory power of the model was 16.7% (F=15.160, p<.001). The results of this study may provide a foundation to develop an efficient intervention program to improve the happiness of senior nursing students.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.4
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• pp.173-180
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• 2020

This is the report of a case study to describe the results of applying an evaluation tool for communication ability when performing core basic nursing skills in fundamental nursing practice education. The communication ability evaluation tool was constructed based on a literature review and expert advice. The tool was applied to test 94 students who were taking fundamental nursing practice courses from October to November 2019. As a result, five factors (self-introduction, eye contact, emotional support, information provision, and therapeutic touch) were derived as evaluable items of communication ability to be evaluated when performing core basic nursing skill, and were evaluated when performing core basic nursing skills to measure vital signs. The average communication ability was 3.96 out of 5 points. According to the rubric, 95.8% of all students attained 'medium' and reached their goal achievement level. The findings of this study are meaningful in providing an important basis for improving the performance outcome evaluation process and for constructing a systematic evaluation system in fundamental nursing practicum. Further studies to secure the validity and reliability of this communication ability evaluation tool and comparative studies with various evaluation tools are suggested.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.9
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• pp.487-497
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• 2020

The study examined the effects, strength, and weakness of chemical peeling and physical peeling, which are some types of peelings that are commonly used for cosmetic skin management for women. For this study, of which the study period was from November 1 to December 27, 2011, 20 female subjects with the compound skin type were investigated. Ten women were assigned to the chemical peeling group, and the other 10 were assigned to the physical peeling group. The experiment continued for six weeks, with one test session per week, totaling six tests. During each session, a skin measurement instrument was used to measure the oil, keratin, pore, wrinkles, and pigments. The results of the tests showed that, in the case of chemical peeling, both glycolic acid peeling and lactic acid peeling were effective in preserving the skin moisture. With physical peelings, crystal peeling was more effective on wrinkles, while diamond peeling was more effective in keratin and pigment improvement. A comparison of the peeling with different media revealed physical peelings to have more effect on more items, but chemical peeling was more effective in moisture and oil changes.

• Journal of Korean society of Dental Hygiene
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• v.20 no.5
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• pp.717-731
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• 2020

Objectives: The purpose of this study was to develop applicable standards for clinical dental hygiene practice in Korea and to evaluate their validity. Methods: Based on the standards for clinical dental hygiene practice developed in the United States and Canada, the standards were adapted to be applicable in Korea. The validity of the standards was evaluated by a self-writing questionnaire among 14 professors and 10 clinicians using a developed tool for evaluating the standards. A focus group interview was additionally conducted for clinicians to increase the validity of the standards. Descriptive statistics and Mann-Whitney test were performed using SPSS 25.0. To analyze the content of the focus group interviews, content analysis was conducted. Results: The standards for clinical dental hygiene practice consisted of five elements of professionalism for dental hygienists and a total of 28 items to perform the five stages of dental hygiene process of care (assessment, diagnosis, planning, implementation, and evaluation) and included conceptual meaning, clinical significance, and application methods with examples for each item. Conclusions: The standards for clinical dental hygiene practice developed in this study could contribute to standardizing dental clinical practices provided by dental hygienists. It is necessary to consistently improve the standards that are highly practical, to prevent oral diseases and maintain oral health of the public, based on the results of this validity evaluation.

• Journal of Korea Technology Innovation Society
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• v.17 no.3
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• pp.540-562
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• 2014

Although the impact of technological partner selection on the success of technological alliance is critical, little attention has been paid to the area of technological alliance partner selection criteria and the relationship between partner selection criteria and success factors of alliance. This study bridges this gap by understanding previous studies of general alliance partner selection criteria such as marketing, international, logistics and production alliances. I drew technological alliance partner selection criteria using AHP method with 12 experts who are currently in charge of technological alliance activities at Korean Venture Companies. This study found 4 criteria such as 'task-related', 'partner-related', 'learning-related', 'risk-related' criteria with 14 items and the relative importance of technological alliance partner selection showed as follows: 'risk-related', 'learning-related', 'partner-related', 'task-related' criteria. In order to test the relationship between technological partner selection criteria and performance, I used 215 survey data of Korean Venture Companies. The results showed that 'partner-related' and 'task-related' criteria had strong positive impacts on the success of technological alliance. Further, I put 4 moderating variables into the study model in order to see their moderating effects. However, no moderating variable showed significant effects. In conclusion section, I discussed the findings and implications of this study and directions for future studies.

• Journal of Elementary Mathematics Education in Korea
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• v.13 no.1
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• pp.97-114
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• 2009

The purpose of this study was to investigate the effects of digital mathematics textbook on spatial abilities, interest and achievement of 6th graders. For this, research questions were set as follow: A. Is there any difference in cognitive ability in the space perception test between the experimental group and the control group. B. What distinctive attributes exist between the experimental group and the control group in the Spatial abilities? C. Is there any difference in learners' interest and achievement between the experiment group and the control group. To investigate the research questions, two classes of 6th grade children were selected from an elementary school in Daejeon and assigned one as experimental group and the other as control group. The experimental group studied mathematics using Digital Textbooks under an individual PC environment while the control group studied using the existing book-type textbooks. The following results and conclusions were obtained from the research. First, the effect of the Digital Textbooks on children's mathematics achievement was not statistically meaningful even though there was some progress in children's achievement. Furthermore, it was not found that the usage of a Digital Textbooks consistently influenced improvement in the students' interest in mathematics. Second, there were some positive changes in the achievement of Spatial ability of the middle subgroup of pretest score in the experiment group. It can have some educational implication that the Digital Textbooks can affect positively to the middle group in mathematics achievement who dominated more than 50% of the class. Third, the number of correct answers was found to be somewhat higher than that of the control group in spatial reasoning items. This means that the learning environment with Digital Textbooks allow more opportunities for manipulating geometric objects physically and mentally. Therefore, It seems necessary to offer various resources such as digital contents for students' geometric learning. For future research, It is strongly recommended to fix the bugs of the digital textbook programs and to upgrade the operating system of the computer.

• Journal of the Korean Society for Nondestructive Testing
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• v.26 no.2
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• pp.69-76
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• 2006

TRISO(tri-isotropic)-coated fuel particle technology is utilized owing to its higher stability at a high temperature and Its efficient retention capability for fission products In the HTGR(high temperature gas-reeled reactor). The typical spherical TRISO fuel panicle with a diameter of about 1mm is composed of a nuclear fuel kernel and outer coating layers. The outer coating layers consist of a buffer PyC(pyrolytic carbon) layer, Inner PyC(1-PyC) layer, SiC layer, and outer PyC(O-PyC) layer Most of the Inspection Items for the TRTSO-coated fuel particle depend on destructive methods. The coating thickness of the TRISO fuel particle can be nondestructively measured by the X-ray radiography without generating radioactive wastel. In this study, the coaling thickness for the simulated TRISO-coated fuel particle with $ZrO_2$ kernel Instead of $%UO_2$ kernel was measured by using micro-focus X-ray radiography with micro-focus X-ray generator and flat panel detector The radiographic image was also enhanced by image processing technique to acquire clear boundary lines between coating layers. The coaling thickness wat effectively measured by applying the micro-focus X-ray radiography The inspection process for the TRISO-coated fuel particles will be improved by the developed micro-focus X-ray radiography and digital image processing technology.