• Journal of the Korean Institute of Navigation
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• v.10 no.2
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• pp.97-114
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• 1986

Ship's maneuverability is very important factor in safe ship handling and economical ship operation. Steering characteristics are consisted of course stability and maneuverability. Today in many advanced ship-building countries, they study ship's course stability, using model ship tests, such as straight line tests, rotating arm tests and Planar Motion Mechanism (PMM) etc., in tow in tanks. It is the purpose of this paper to provide ship's handlers with better understanding of steering characteristics and to help them in safe controlling and manevering . In this paper, the author simulated response of various vessels, running straight course with constant speed, and they are disturbed by small external disturbance of one degree yaw angle with no angular velocity . The author used the hydrodynamic derivtives resulted at tests of Davidson's laboratory in Stevens Institute of Technology, New Jersey, U.S.A. Course stability was evaluated and analyzed in various respects, such as block coefficient, ratio of ship's length to beam, draft and rudder area ratio etc. The obtained results are as follows : (1) The ship's course stability is affected by magnitude of block coefficient greatly. In case that the block coefficient is more than 0.7, the deviation varies at nearly same rate but the requistite time to reach the steady course is different. (2) The ship's course stability is affected by magnitude of L/B. When the dimensionless time reaches about 3, the deviation and requisite time to reach the steady course are influenced nearly same. After the dimensionless time is about 3, they change on invariable ratio. (3) The effect to course stability by L/T and RA' can be neglected. (4) The reason why thy VLCC and container feeder vessel are unstable on their course is that their block coefficient is generally more than 0.8 and the ratio of ship's length to beam is about 6.0.

• YAKHAK HOEJI
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• v.57 no.4
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• pp.299-308
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• 2013

According to the changed '2+4'-year pharmacy school curriculum in Korea, pharmacy preceptors play a highly crucial role in educating student pharmacists through practice-based learning. Whether the new curriculum in a Korean pharmacy school will become firmly established or not depends on the competency of a preceptor. Before the preceptors with high competencies are anticipated, the effective education programs for them should be provided. However, there have been little studies regarding the competencies of pharmacy preceptors in Korea. This study was to analyze the degree of differences between importance and performance of preceptors' competencies. The self-reported questionnaire was utilized to collect data from pharmacists in the preceptor education program of a university. Total 122 pharmacists participated in the program, and 78 responded to the survey questionnaires. The average of importance for overall evaluation items was 4.32 whereas that of performance for them was 3.51 by using a 5-point Likert scale. The evaluation items with relatively marked differences between importance and performance were 'sufficient time allowance for students', 'teaching research results regarding newly approved drugs', 'clear understanding of goals and learning contents about pharmacy practice experiences', and 'plan for systemic experience educations'. Further follow-up researches on changes of the differences in importance- performance of preceptors' competencies after precepting student pharmacists should be implemented. Furthermore, the effective and appropriate methods for the preceptor education programs based on the follow-up studies should be developed to reduce the difference between importance and performance.

• Journal of The Korean Society of Integrative Medicine
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• v.9 no.2
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• pp.63-73
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• 2021

Purpose : Selective functional movement assessment(SFMA) is a movement-based assessment tool designed for clinicians to diagnose and treat pain and functional physical problems. This concept is used for assistance in occupations related to movement, including clinical medical personnel, such as physical therapists, physical education instructors, and athlete coaches. Although this concept is widely used by clinicians, research and scientific proofs are relatively insufficient. This study aimed to review the literature on the understanding, reliability and effectiveness of SFMA, and to consider its role in the future of rehabilitation. Methods : In this review, a total of nine articles were selected according to the eligibility criteria of three major thesis topics. The main topics covered in the literature are reliability and effectiveness of clinical use of SFMA. To gather research articles, we searched official term 'Selective Functional Movement Assessment'. Among the searched 60 studies, nine were mentioned in this study that contained overlapping information and matched our desired topic. We reviewed four reliability analyses, four case reports, and one experimental study. Results : Reliability has an intermediate degree between high raters and within raters. The validity of the SFMA system is influenced by a combination of experience and logic; hence, further improvement is needed. Therefore, if the intervention was effective based on the diagnosis result, then biomechanical evidence is necessary to further support the claim. Conclusion : In future research, to use SFMA as a diagnostic tool with high accuracy, it is necessary to improve the reliability of the main problem through breakout, support for guidelines and validity and efficiency.

• Journal of Digital Convergence
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• v.17 no.9
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• pp.327-335
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• 2019

In the 1970s, Korea actively produced so many animated works which is called the "golden age" of korean animation. However, Korea imported and subcontracted foreign animations than creating original works and, there has been a constant controversy that many of the korean animations imitated foreign works. Therefore, this paper aims to analyze the factors that caused this and its patterns, focusing on works suspected of plagiarism in Korean animation during the 1970s and 1980s. First, the focus will be on the definition and composition of plagiarism in art creation, secondly, on the political-ideological, industrial-administrational, production-structural, and copyright awareness aspects of the factors of plagiarized animation. Thirdly, 30 korean animations produced at the time will be analyzed on the degree of design theft and plagiarism based on six criteria focusing on characters' shapes and color arrangements. By analyzing the social factors and patterns of plagiarism, this study aims to provide a social and cultural understanding of academic value about the process of korean animation's development.

• Journal of the Korean Society of Safety
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• v.34 no.3
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• pp.57-64
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• 2019

Lack of incident reporting culture has been pointed out as a potential risk factor across industries. Consequently, comprehensive understanding of the factors affecting the willingness to report (WTR) is necessary. However, our knowledge on the related studies are not enough to date and even most parts of the existing studies have focused on patient safety, which makes it difficult to universally apply the factors to all industries. Therefore, this study aimed to identify WTR factors in chemical plants and evaluate the influence degree of the factors. To do this, 45 candidate factors were summarized throughout the previous studies and surveying plant safety staff. A questionnaire survey was conducted for 614 all employees from 9 chemical plants which belong to one company, and finally 32 WTR factors were identified throughout 520 responses. Of these, 19 factors were consistent with the previous studies and 13 factors were newly identified. The most influential factor was 'Views on the necessity of incident reporting', and 'Reporting practice by outcome severity', 'Fear of vilification, conflicts, blame, or sanctions' were followed. This result not only suggests various WTR factors suitable for chemical plants, but also shows need to derive specific factors that are appropriate to each industry. An empirical study could be expected to increase incident reporting by using these factors and verify its effectiveness on injury rate.

• Journal of Information Technology Services
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• v.17 no.4
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• pp.53-74
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• 2018

This study theoretically examines the essence of the competencies, qualifications and grades newly required in the era of the 4th industrial revolution, points out that the engineer rating system does not reflect the new talent and practical capability, and conducts theoretical and empirical analyzes on improvement of the rating system. The current rating system need to be improved because it is not possible for graduates and experience workers to upgrade. Also, it is reasonable that the current highest grade of engineer, the Professional Engineer, which is a sort of qualification, is not a grade but a function of calculating the grade. Based on this theoretical background, empirical analysis of the question investigation and focus group interview shows that the rating system should be improved to four grades or return to the previous system in 2013. And if it is reduced to four grade, it should go in the way that the professional engineer and the qualified engineer combined. In the industry, the future skills of engineers are as follows : qualification, ability to use emerging technology, problem solving, understanding and utilization of major, and data management, etc. These can be summarized as qualification, education (degree) and career. In particular, the engineering industry considers qualifications, degrees, and career experience, and career experience as the most important elements of the rating system. In this regard, it is necessary to introduce a method that accurately reflects the career experience in the improvement of the engineer rating system.

• The Journal of the Korea Contents Association
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• v.21 no.6
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• pp.128-137
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• 2021

The purpose of this study is to examine the effect of sympathetic reactions to public service advertisement video messages produced for health campaigns. To this end, based on the empathy response scale proposed by Campbell & Babrow (2004), the empathy response to the images of nine health campaigns with themes of smoking cessation, tuberculosis, and suicide triggered fear of health risks and health behaviors (information seeking, preventive actions). As a result of the analysis, among the factors of empathy reaction, the reality of the message creative, the match of emotions, and the identification of the characters in the video each played a role in raising fear, and it is rather fear that logically understanding the situation that causes health problems through the health campaign video It was found that it played a role in reducing health information seeking behavior. On the other hand, it was found that the higher the degree of interest, such as sympathy for the characters in the video, among the factors of the sympathetic response to the health campaign, the higher the intention of preventive action to reduce the health risk.

• Journal of Korean society of Dental Hygiene
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• v.23 no.4
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• pp.261-268
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• 2023

Objectives: In this study, we aimed to examine the dysphagia knowledge, preventive attitudes toward dysphagia, and educational needs concerning geriatric oral health, of dental hygienists, and to provide fundamental information for recognizing the necessity of knowledge and education concerning geriatric oral health and for increasing educational needs. Methods: From April 1 to June 30, 2022, a questionnaire survey was administered to 198 dental hygienists via an online link. SPSS Statistics ver. 22.0 was used to conduct the frequency analysis, t-test, one-way ANOVA, Pearson's correlation coefficient, and multiple regression analysis. Results: Regarding the difference in knowledge of dysphagia depending on general characteristics, the study participants had more knowledge of dysphagia when they were more interested in dysphagia and had a higher geriatric treatment frequency. The preventive attitudes toward dysphagia were strong in those who graduated from graduate school or higher, had more prevention and education at work, became more interested in dysphagia, received more education about dysphagia, had intention to receive additional education on dysphagia, and had a higher geriatric treatment frequency. Positive correlations were observed between knowledge of dysphagia, preventive attitudes toward dysphagia, and educational needs related to geriatric oral health. The educational needs related to geriatric oral health were found to be, significantly and positively influenced by preventive attitudes toward dysphagia, having master's degree or higher, knowledge of dysphagia, and intention to receive additional education on dysphagia. Conclusions: It is necessary to improve the quality of oral health services offered to older patients by having accurate knowledge of dysphagia implementing appropriate prevention practices for dysphagia, and understanding the educational content needed by the oral hygienists and developing an effective education program to enhance their professionalism.

• Journal of The Korean Association of Information Education
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• v.11 no.1
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• pp.49-57
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• 2007

The purpose of this study is to investigate operating practices of human resources nourishing institutions and analyze the degree of satisfaction to the e-learning learners in Busan. This study adopted a questionnaire method in research of 70 human resources nourishing institutions and 758 e-learning learners in Busan area for empirical analysis. Techniques used in analyzing data was frequency analysis. SPSS for windows programs were applied in the analysis. The major findings of this study are as follows. First, it is found that there is a widespread affirmative perceptions in the fields of both operating practices and satisfaction on e-learning. Second, however, it is also found that more efforts needed to be made in some areas such as method for effective e-learning and the management of programs, and more concerns should be need to the age group of fifty-over. These groups are short of understanding and acceptance of e-learning environment.

• The Journal of Engineering Geology
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• v.28 no.3
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• pp.349-365
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• 2018

The strain and acoustic emission (AE) signals of Pocheon granite were measured during uniaxial compression tests to investigate microcrack formation and damage. Crack closure, initiation, and damage stresses of each sample were determined through an analysis of the crack volumetric strain and stiffness. The samples experienced four damage stages according to stress levels: stage 1 = crack closure stage; stage 2 = elastic stage; stage 3 = crack initiation stage; stage 4 = crack damage stage. At least 75% of all AE signals occurred in stages 3 and 4, and different AE parameters were detected in the four stress stages. Rise time, count, energy, and duration clearly showed a tendency to gradually increase with the damage stress stage. In particular, the rise time, energy, and duration increased by at least 95% in stage 4 as compared with stage 1. However, the maximum amplitude showed a smaller increase, and the average frequency decreased slightly at higher stages. These results indicate that as the degree of rock damage increases, the crack size grows larger. The crack types corresponding to the AE signals were determined using the relationship between RA (Rise time / Amplitude) values and average frequencies. Tension cracking was dominant in all stress stages. Shear cracking was rare in stages 1 and 2, but increased in stages 3 and 4. These results are consistent with previous studies that reported cracking begins after samples have already been damaged. Our study shows that the state of rock damage can be investigated solely through an analysis of AE parameters when rocks are under compressive stress. As such, this methodology is suitable for understanding and monitoring the stress state of bedrock.