• Journal of the Korean Crystal Growth and Crystal Technology
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• v.22 no.3
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• pp.115-121
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• 2012

Sapphire single crystals have been highlighted for epitaxial gallium nitride films in high-power laser and light emitting diode (LED) industries. Among the many crystal growth methods, the Kyropoulos process is an excellent commercial method for growing larger, high-optical-quality sapphire crystals with fewer defects. Because the properties and growth behavior of sapphire crystals are influenced largely by the temperature distribution and convection of molten sapphire during the manufacturing process, accurate predictions of the thermal fields and melt flow behavior are essential to design and optimize the Kyropoulos crystal growth process. In this study, computational fluid dynamic simulations were performed to examine the effects of the crucible geometry aspect ratio on melt convection during Kyropoulos sapphire crystal growth. The results through the evolution of various growth parameters on the temperature and velocity fields and convexity of the crystallization interface based on finite volume element simulations show that lower aspect ratio of the crucible geometry can be helpful for the quality of sapphire single crystal.

• Journal of Technology Innovation
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• v.22 no.3
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• pp.1-35
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• 2014

This study analyzed convergence status among input technologies used in technology development with Technology I-O analysis. It was another version of industry input-output analysis which is used in technology planning. This case is an analysis of association between technology an product. The subjects of analysis were 401 tasks that applied to '2012 Convergence Technology Development Project for Small and Medium Businesses' promoted by Korea Technology & Information Promotion Agency for Small and Medium Enterprises. The process of analysis is as followed. First step, we made a matrix table as an input of technology input-output analysis. Input was defined by technology and output was defined by the product. Input technology was defined in a 3-digit code under National Science Technology Classification and output products were defined in a 5-digit under National Standard Industry Code. Second, the Spillover ratio among technologies were calculated and was used to make a picture of technology linkage. As a result of analysis, technology spillover of embedded S/W was the highest in IT convergence, mold product in ET convergence, and functional cosmetics development technology in BT convergence. In general, IT convergence had many element technologies with high technology spillover, and ET had a small number of element technologies with high technology spillover. Therefore, investment effect of element technology is expected to be large if investment on element technologies with high technology spillover is important for vitalizing convergence.

• Journal of Nuclear Fuel Cycle and Waste Technology(JNFCWT)
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• v.7 no.2
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• pp.125-131
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• 2009

An electrolytic system (zinc anode-gallium cathode) was setup to evaluate the performance of several stirrers prepared for this study, where stirrers have been used to prevent uranium from forming dendrite on the cathode in pyrochemical process. In the case of no-stirring condition, zinc dendrites began to grow on the gallium surface in 1 hour and some dendrite grew out of the cathode crucible around 6 hours. When a rectangular stirrer or a tilt stirrer was rotated, at 40${\sim}$150 rpm, to mix the liquid gallium cathode, dendritic growth of zinc metal was prevented irrespective of revolution speed, but some of the deposits overflowed out of the cathode crucible owing to the large centrifugal forces at 150 rpm. The harrow stirrer did not nearly retard the dendrite growth at 40 rpm, but the dendrite growth was retarded at higher than 100 rpm and the zinc deposits also did not overflow at 150 rpm. Pounder could also prevent the dendrite growth to some extent but it had some difficulties in operation compared with other types of stirrers.

• The Journal of the Korea Contents Association
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• v.9 no.9
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• pp.259-267
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• 2009

This study intends to figure out the variables affecting the degree of female undergraduates' perceived risk of smoking and utilize them as foundational data for educating them to quit smoking. Thereupon, it conducted a self-administered survey from May 18 till 25 of 2009 to 231 female undergraduates attending S University located in Gyeonggi-do. The study tool contains 19 items of general characteristics and 8 of the degree of perceived risk of smoking. The data collected were analyzed by SPSS program, and the following results were gained. 1. According to the result on the degree of female undergraduates' perceived risk of smoking, the degree was shown high as the average was 4.32 among the perfect score of 5; thus, the degree of perceived risk of smoking was high. 2. In terms of the household economic level, female undergraduates with the lower economic level indicated the higher degree of perceived risk of smoking. There existed significant difference by their economic level (F=7.14, p<.01). 3. In regard of whether the female undergraduate smokes or not, the non-smoker perceives the degree of risk of smoking more highly than the smoker does; there is significant difference by whether they smoke or not (t=-2.43, p<.05). 4. About the number of friends who smoke, female undergraduates with one smoking friend show the highest degree of perceived risk of smoking. Those haying three or more smoking friends indicate the low degree of perceived risk of smoking. There exists significant difference by the number of smoking friends they have (F=3.14, p<.05). 5. According to the degree of perceived risk of smoking by their school life satisfaction, the female undergraduates expressing 'dissatisfaction' show the highest degree of perceived risk of smoking while 'satisfaction' indicates the average level. This was statistically significant difference (F=4.81, p<.01). Therefore, it is thought that it will be necessary to develop programs based on this research which can allow female undergraduates to team the importance of quitting smoking and actively participate in the education for it.

• Journal of Korean Philosophical Society
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• v.105
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• pp.373-400
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• 2008

This essay is an analysis on Daoist deconstructivism and Confucian constructivism about music and language. (1) Daoist criticizes that the Confucian constructive music and language fail to describe original sounds and original facts of doing nothing (wuwei, 無爲). According to Daoist, music and language can be an instrument to describe true facts in the world. So Daoists try to attain a state of 'seeing things as things themselves (yiwuguanwu, 以物觀物)' by 'forgetting oneself (wangwo, 忘我).' (2) However Confucian music and language is a part of one's life. Confucians try to get truth, goodness, and beauty by exercising one's music and language. Confucian music is associated with political and moral development in society. The Confucian genres of poetry (shi, 詩), appealing letter (shu, 疏), declaring writing (biao, 表), record (ji, 記), and written words (ci, 詞) are processes of developing one's life. Further, Confucian rhetoric of 'Xing (興)' in writing poem shows that one's language can be developed in contexts of one's life. (3) Although music and language is associated with human subjective narratives as if Confucians say, diverse narratives of different subjectivity cannot appear in one's lives if all kinds of narrative is absorbed in Confucian absolute ideological slogan to devide things into good and bad. Accordingly, the Confucian view of music and language can develop diverse narratives when it does not show an inclination toward moral dichotomy preunderstood by Confucian ideology.

• The Journal of the Convergence on Culture Technology
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• v.9 no.4
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• pp.211-221
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• 2023

The purpose of this study is to improve the validity of the evaluation by adding the factor of academic achievement to the subject of evaluation, and to improve the reliability of the evaluation by verifying the legitimacy of control of in-class attitude and developing the correction index of satisfaction of teaching. The results of the study are as follows. Firstly, it was confirmed that the students' in-class attitude had a significant effect on satisfaction of teaching. The more positive the in-class attitude, the higher the satisfaction of teaching, and vice versa. Secondly, it was confirmed that the students' in-class attitude had a significant effect on academic achievement. The more positive the in-class attitude, the higher the academic achievement, and vice versa. Thirdly, it was confirmed that satisfaction of teaching did not have a significant effect on academic achievement. High satisfaction of teaching does not mean that the quality of the teaching is high, and vice versa. Fourthly, the correction index of satisfaction of teaching was developed to correct the results of satisfaction of teaching that may be distorted due to the students' negative in-class attitude. In conclusion, academic achievement should be added as the subject of evaluation in addition to the satisfaction of teaching to improve the validity of evaluation and the correction index of satisfaction of teaching should be applied to improve the reliability of evaluation.

• Journal of the Korean Crystal Growth and Crystal Technology
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• v.34 no.3
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• pp.103-107
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• 2024

In this study, nickel, a pure metal material, was proposed as a saggar for synthesizing NCM [Li(Ni_xCo_yMn_z)O₂] cathode active material. Nickel is known as a metal that is resistant to oxidation and has a high melting point. Nickel is one of the main components of NCM cathode material and was expected to be free from problems with contamination from saggar during cathode material synthesis. We sought to confirm the possibility of nickel as a saggar for synthesizing NCM cathode active materials. When a Ni metal crucible and Ni_0.8Co_0.1Mn_0.1(OH)₂ (NCM 811) precursor material were reacted at 900℃ for a long time, the change in the reaction layer on the surface of the crucible over time was analyzed. The nickel crucible reaction layer formed during heat treatment at 900℃ was nickel oxide, and is thought to have been created by simultaneous oxygen diffusion from the cathode precursor oxide and reaction with oxygen in the atmosphere. The change in thickness of the oxide layer appears to slow down after 480 hours, which suggests that the rate of oxygen diffusion from the precursor is reduced. It remained combined without falling out of the crucible until 480 hours. However, it was confirmed that the oxide layer falls off after 720 hours, so it is thought that it can be used as saggar for NCM synthesis only for a certain period of time.

• Journal of the Korean hospital association
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• v.13 no.11 s.119
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• pp.4-8
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• 1984

현대는 의료보험시대라 해도 과언이 아니다. 이는 의료보험제도가 건강한 삶을 유지하려는 모든이의 희구속에,의료에 대한 관심이 점점 고조되어 현대 생활의 한 부분으로서 정착되어가고 있기 때문이기도 하다. 그간 국민복지향상을 지향하며 발전해온 동제도가 시행과 더불어 많은 제도상의 문제점과 함께 새로운 변화를 야기시켜 오늘의 사회에 부각되고 있는것도 의료보험제도가 국민가자에게 미치는 영향이 어떠한가를 적라라하게 보여주고 있는것이라 하겠다. 본고는 이러한 견지에서 의료보험시대와 더불어 야기되는 문제점들을 고찰하고 나아가 동제도의 발전을 위한 바람직한 방향을 제시하고 있다,

• Journal of the Korean Society of Costume
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• v.41
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• pp.107-116
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• 1998

본 연구의 목적은 의복 스타일 선호에 신체만족도가 미치는 영향을 규명하는 것이다. 조사대상은 미국 여대생으로 177부의 설문지를 자료분석에 사용하였다. 신체만족도는 신체 5 부위 (얼굴, 상체, 하체, 신장, 체중) 각각에 대해 측정되었고 의복스타일 선호는 의복이 몸에 타이트하게 끼는 정도에 대한 선호, 어두운 색상에 대한 선호, 허리, 힙(hips), 가슴(bust), 목(neck), 다리에 강조점을 두는 의복에 대한 선호로 측정되었다. 결과로 특정 부위에 대한 신체만족도는 그 부위에 관련된 의복스타일 선호와 관계가 있었다. 예로 응답자가 체중부위에 만족하면 할수록 몸에 타이트하게 끼는 의복과 밝은 색상의 의복, 허리와 힙을 강조한 의복을 선호하였다. 이성적 행동이론이 이들 결과를 설명하는데 사용되었다.

• Proceedings of the Korean Radioactive Waste Society Conference
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• 2009.11a
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• pp.325-326
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• 2009

카드뮴 증류공정을 개발하기 위해 세륨을 TRU 대용원소로 선정하고 증발조 도가니 크기에 맞게 성형한 후 거동을 조사하였으며, 실험은 등온 및 비등온 방법을 이용하였다.