• International journal of advanced smart convergence
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• v.10 no.2
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• pp.123-129
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• 2021

The purpose of this study is to analyze the relationship between dance passion, self-management, and dance immersion. Specifically, passion for dance was subdivided into obsessive-compulsive passion and harmonious passion, and these were selected as exogenous variables. In addition, it is intended to provide theoretical and educational implications by analyzing the structural equation model composed of endogenous variables of self-management and dance immersion. The subjects of this study were college students majoring in dance, and the final 206 students were selected as effective samples by the convenient sampling method. For data processing, frequency analysis and reliability analysis were performed using SPSS 23. In addition, AMOS 21 was used for confirmatory factor analysis, correlation analysis, and structural equation model analysis. As a result of the study, first, it was found that both compulsive passion and harmonious passion have a positive effect on self-management. Second, self-management was found to have a positive effect on dance immersion. Third, it was found that compulsive passion had a positive effect on dance commitment, but harmonious passion did not have a statistically significant effect on dance commitment.

• Restorative Dentistry and Endodontics
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• v.20 no.1
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• pp.351-361
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• 1995

The purpose of this study was to evaluate the shear bond strength of the composite resin bonded on the bleached enamel surface according to its surface treatment. 90 extracted human premolars were divided into six groups. : enamel unbleached (control group) and enamel bleached with 15% carbamide peroxide for 2 weeks (experimental groups: 1, 2, 3, 4 and 5). The surface of bleached enamel in all experimental groups was treated by following manners. Experimental group 1 : catalase immersion for 3 mimutes. Experimental group 2 : catalase immersion for 15 mimutes. Experimental group 3 : artificial saliva immersion for 1 hour. Experimental group 4 : artificial saliva immersion for 48 hours. Experimental group 5: surface reduction of the bleached enamel about 0.5mm-1mm with superfine diamond bur. Composite resin molds(3mm height, 3mm diameter) were bonded to the untreated enamel and treated. The shear bond strengths of composite resin bonded to enamel of each specimen were tested with universal testing machine at a crosshead speed of 5mm/min and 500Kg in full scale and analyzed statistically. The following results were obtained : 1. Control group had the highest shear bond strength with $19.92{\pm}5.14$ MPa and experimental group 5 had the lowest shear bond strength with $11.15{\pm}4.23$ MPa. 2. Control group showed significant differences in shear bond strength with experimental group 1(P<0.05). 3. Control group showed significant differences in shear bond strength with experimental group 5(P<0.05). 4. Experimental group 4 showed significant differences in shear bond strength with experimental group 5(P<0.05). 5. Experimental group 3 showed no significant differences in shear bond strength with experimental group 4(P<0.05).

• The Journal of Korean Academy of Prosthodontics
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• v.39 no.3
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• pp.250-259
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• 2001

Since the late 1930s, acrylic resins have been the materials of choice for the fabrication of complete denture bases. It has excellent esthetic properties, adequate strength, low water sorption, and low solubility. But acrylic resin has disadvantage of processing shrinkage that reduces denture retention and accuracy of denture occlusion. Metals also have been used in denture base material. Metals used in denture bases display excellent strength and dimensional stability. The major disadvantages associated with metal denture bases include increased cost, difficulty in fabrication, compromised esthetic qualities, and inability to re-base. The purpose of this study is to compare the artificial tooth movements of complete dentures with resin bases and metal bases after curing, deflasking, polishing immersion in water for 1 week and 4 weeks. Twenty-four maxillary complete resin denture bases with artificial teeth were fabricated. Twelve of them were resin based and other twelve of them were metal based. Fine crosses were marked on the incisal edges of right central incisors and distobuccal cusps of be second molars. Measurements were done for the changes of distances of reference points at the time of wax denture, after deflasking after decasting after polishing after immersion in water for 1 week and 4 weeks Meaurements were done to the accuracy of 0.001mm with a measuring microscope. The results were as follows : 1. Metal base showed significantly less tooth movement than resin base after curing and decasting (p<0.01). 2. Metal base showed significantly less tooth movement than resin base after polishing (p<0.01). 3. After immersion in water for 1 week and 4 weeks, metal base showed less movement than resin base. Difference was significant for anterior-posterior distances (p<0.01), but not significant for molar-to-molar distance (p>0.01). 4. 1 week and 4 weeks of immersion failed to compensate the initial processing shrinkage of metal and resin bases (p>0.01).

• Journal of Korean Society of Forest Science
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• v.99 no.3
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• pp.423-431
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• 2010

To determine physical and physiological factors for Liriodendron tulipifera L. somatic embryo germination, temporary immersion bioreactor (TIB) system was investigated. It was designed to immerse liquid media with plantlets so that it was able to adjust the immersion time. Immersion of 120 minutes every 4 hours and 60 minutes every 4 hours was found to be effective in germination (91.64%, 85.67%, respectively). However, hyperhydricity of the plantlets was higher in short immersion time (15 minutes every 6 hours) and long immersion time (120 minutes every 4 hours) (51.61%, 34.28%, respectively). Immersion of 60 minutes every 4 hours showed the lowest hyperhydric plantlets, and also it showed the lowest activities of abscisic acid (ABA), superoxide dismutase (SOD), and catalase. The overall results implied that immersion time of media affected germination and growth of somatic embryo, and it was able to make use of germination and growth of L. tulipifera somatic embryos.

• Journal of the Korea Society of Computer and Information
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• v.28 no.11
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• pp.135-145
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• 2023

Due to the decrease in the school-age population, the number of freshmen at local college who lack basic learning skills is increasing. Thus, C college has been running a basic learning ability improvement clinic program. This paper is a case study that investigates the effect of basic learning ability improvement clinic programs on major class immersion, efficacy, and major class satisfaction. In 2022, a total of 459 students were surveyed, including 238 students who participated in online and offline classes for basic learning ability improvement clinics and 221 students who did not participate in classes. Data processing was performed using SPSS Ver. 26.0 was used. The results of this study are as follows. First, among the sub-factors of academic self-efficacy, the group participating in the basic learning ability improvement clinic showed significant differences in task difficulty preference and confidence. Second, the class participation group showed a significant difference in learning immersion in major classes. Third, the class participation group showed significant differences in all sub-factors of major satisfaction. In conclusion, it was found that the basic learning ability improvement clinic class had a significant effect on academic self-efficacy, learning immersion, and major satisfaction.

• The Journal of the Korea Contents Association
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• v.21 no.3
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• pp.205-216
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• 2021

This study aims to discuss ways needed to prepare their careers through relations between the personal internal factors perceived by college students in the process of career preparation and the external factors they experience during college life. To this end, the study conducted not only a questionnaire survey of 927 students at K University in Seoul but also hierarchical multiple regression analysis, independent two sample t-test, and one-way ANOVA (analysis of variance). The study set career preparation as a dependent variable, presented research models in four steps, and the explanatory power of each model was statistically significant. According to the findings of the study, both Model 1 and Model 2, gender had a significant impact on career preparation. Also, when self-directedness was added to Model 2, self-directedness had a greater impact on career preparation than gender did. When satisfaction with extracurricular activities was added to Model 3, this factor turned out to be helpful for career preparation. When college immersion, or a sense of belonging to college, was added to Model 4, the higher the sense of belonging students perceived, the more helpful they felt it for their career preparations. This study is expected to be helpful in preparing a policy to support college students' career preparation by grasping the relations between the personal characteristics of college students and career-related activities and college immersion they experience during college life.

• Journal of the Korea Society of Computer and Information
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• v.28 no.3
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• pp.91-100
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• 2023

This study is a case study comparing and examining the effects of non-face-to-face(NFTF) classes in the 2021-2 semester and face-to-face(FTF) classes in the 2022-2 semester on learning immersion, learning stress, and learning satisfaction. The learning immersion and learning satisfaction of 240 students were analyzed in NFTF and FTF classes of department S of C junior college where the same textbook, same subject, and same professor were taught. For data processing, SPSS Ver. 23.0 was used. The data is used to measure reliability by Cronbach's α, t-test, Pearson's correlation coefficient, and multiple regression analysis. The results of this study are as follows. First, learners' learning immersion was higher in FTF than NFTF classes among engineering major subjects. Second, it was found that there was a difference in learning stress according to the types of FTF and NFTF classes in engineering major subjects. Third, it was found that there were differences in practice content, communication, and task performance of sub-factors of learning satisfaction according to FTF and NFTF class types in engineering major subjects. In conclusion, it was found that FTF classes had a more positive effect on learning immersion and satisfaction, and NFTF classes had a more negative effect on learning stress.

• Proceedings of the Korean Society of Computer Information Conference
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• 2011.01a
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• pp.323-326
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• 2011

본 연구는 재학생들에 대한 게임 과몰입 위험요인과 보호요인으로 작용하는 기질 및 성격적 특성을 살펴봄으로써 게임 과몰입으로 인해 학업 및 대학생활 적응에서 어려움을 겪는 학생들을 돕기 위한 방안을 제시하고자 한다. 게임 과몰입이 학업적응 및 학업성취와의 관련성과 게임 과몰입 방안을 마련하기 위한 기질 및 성격적 특성에서의 위험요인과 보호요인을 확인할 수 있다.

• Management & Information Systems Review
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• v.21
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• pp.209-237
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• 2007

This research intends to check what value and convenience the on-line brand community members pursue and how such value and convenience affects brand affection. Researching on-line brand community members of ipod, it was found that their value and convenience is composed of 3 types, namely, functional value, emotional value and self-expression value and the concept of brand affection is composed of 3 subsidiary factors, namely, 'love', 'interest' and 'immersion.' Checking how the functional, emotional and self-expression convenience of on-line brand community members affected brand affection, the following result was found. First, functional value and convenience has significant influence on the love affection only at the level of brand affection and has no influence on the relational and immersion affection. Second, self-expression value and convenience has significant influence only on the love affection of brand like functional value and convenience. Third, it was found that emotional value has significant influence on the 3 dimensions of brand affection, namely, love affection, interest affection and immersion affection.

• Restorative Dentistry and Endodontics
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• v.6 no.1
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• pp.77-81
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• 1980

The author has studied comparatively the sealing quality of conventional Z.O.E. cement, Kerr sealer and Nogenol sealer by means of penetration of 2% methylene blue solution through the root apex of human teeth in 72 cases as time elapsed. The results were as follows; 1. All the specimens, whose dye immersion time is two days, showed dye penetration of low degree unrelated to the kinds of root canal sealer. 2. Kerr sealer group, like conventional Z.O.E. group, showed dye penetration of high degree related to increased time of immersion in the dye. 3. In Nogenol group, there was slight increase in penetration related to increased time of immersion in the dye. 4. Kerr sealer group showed comparatively lower grade of dye penetration than conventional Z.O.E. and higher than Nogenel sealer.