• The korean journal of orthodontics
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• v.32 no.1 s.90
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• pp.51-57
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• 2002

The purpose of this study was to compare in vitro shear bonding strength with three different enamel surface preparations (1) 30% sulfated polyacrylic acid with 0.3M lithium sulfate (2) 40% sulfated polyacrylic acid with 0.3M lithium sulfate (3) 37% phosphoric acid. 105 extracted human premolar teeth were divided into each three groups of 35. Metal brackets were bonded to teeth in the three groups. The same self curing resin was used for all groups. A shearing force was applied to the teeth. After debonding, bases of bracket and enamel surfaces were examined under steroscopic microscope to determine the failure modes. Statistical analysis of the data was carried out with one way ANOVA and Student t- test. The results were as follows. 1. Shear bond strength values for the 30% polyacrylic acid and 40% polyacrylic acid group were approximately two thirds of the phosphoric acid group. It maintains clinically acceptable but not enough bond strength. 2. There was no statistically significant difference in shear bond strengths between 30% and 40% polyacrylic acid group. 3. The failure modes of brackets had some differences. In polyacrylic acid groups, the percentage of adhesive/enamel failure was higher than that of adhesive/ bracket interface failure. On the contrary in phosphoric acid groups, the results were reversed. Further study of bond strength could be required. If polyacrylic acid enamel conditioning is used clinically.

• The korean journal of orthodontics
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• v.35 no.3 s.110
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• pp.207-215
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• 2005

This study was performed to evaluate clinical practicality of the rebonding method with flowable resin without the removal of the residual resin on the debonded theeth and debonded bracket base after debonding. The samples of the control group (group I) were rebonded with Transbond XT using the usual rebonding method after the residual resin was removed. At experimental group, the brackets were rebonded with Transbond XT(group II) and CharmFil Flow (group III) without removal of residual resin which is the possibility becoming the index (or rebonding to similar position With initial bonding. The Shear bond Strength of the each group was measured. Patterns of bonding failure were evaluated with modified ARI score. and the shear bond strength according to patterns of bonding failure at experimental group was compared. Between the control group $(6.51\pm1.21MPa)$ and the group II rebonded with Transbond XT $(6.30\pm1.01MPa)$ did not have significantly difference in the shear bond strength (p=0.534), and the shear bond strength of group II was Significantly lower 4han the group III rebonded With CharmFil Flow $(7.29\pm1.54 MPa)$ (P=0.009). At control group, there was not large difference if distribution of bending failure pattern. But at experimental group, bond failure did not occur in interface between the resin-enamel. and bond failure between the resin-bracket, within the resin was distributed similarly. There was not significantly difference in the shear bond strength according to patterns of bonding failure at experimental group (P>0.05) The result of this study showed that the method suggested in this study aid flowable resin as rebonding adhesive could be useful in clinically.

• Proceedings of the Korean Vacuum Society Conference
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• 2015.08a
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• pp.130-130
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• 2015

플라즈마를 이용한 cleaning, etching, sputtering 공정에서 발생하는 마이크로아크방전이나 turn-off후의 잔류정전기는 공정대상물의 절연파괴나 전자소자에 전기적 손상을 유발함으로서 공정의 불량률을 증가시키는 중요한 요인이 된다. 본 연구에서는 잔류정전기를 관찰하기위하여 실린더형 챔버구조의 평행평판 전극구조를 지닌 용량결합형 플라즈마에서 powered electrode에 부착된 유전체 기판 표면의 잔류 정전기의 변화 양상을 planar type probe로 측정해보았다. 300mtorr 압력에서 아르곤가스로 발생시킨 플라즈마가 존재할 때 낮은 음전위 평균값을 가지던 기판표면 전위가 전력인가가 중지되었을때 20V 가량의 양전위를 가질 수 있음을 측정 하였고, 이것을 COMSOL MULTIPHYSICS TOOL을 활용한 시뮬레이션과 비교하였다. 이 현상이 파워인가 전극이 플라즈마 영역에 노출되느냐에 따라 발생할 수 있음을 알게 되었고, 그 크기와 지속시간은 입력전력 및 블로킹 커패시터와 유전체 기판의 정전용량에 의존함을 확인 하였다.

• Journal of Life Science
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• v.2 no.1
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• pp.2-10
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• 1992

cAMP-CRP complex에 의해 전사조절을 받는 관련유전자의 구조, 특징, 조절양상, 기작과 CRP의 생화학적 및 분자생물학적이해 등을 살폈다. 그러나 대장균의 전체유전자의 구조해석이 연구사업으로 실행되어지고 있는 현실에서 볼 때 CRP의 조절하에 있는 유전자군이 보다 더 복잡 다양한 system으로 생각되어져서 CRP조절계의 전체적인 양상으로 해명하기 위한 연구도 이루어질 것으로 생각되어진다. 즉, cAMP-CRP의 조절하에 있는 조절영역의 전체를 파악함은 operon의 발현조절의 해명에 중요한 기틀이 될 뿐만 아니라 개별유전자의 이해를 위한 것보다 복잡한 세포 전체의 제어계를 분자적수준에서 해결하는데 중요한 과제라고 사료되어진다. 몇 가지 연구 결과에서는 cAMP-CRP가 결합은 하면서도 발현조절에는 관여하지 않는다든지, cAMP가 결합하지 않으면서도 전사조절을 받을 수 있는 유전자들이 밝혀지고 있다.

• Journal of Korea Game Society
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• v.11 no.1
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• pp.15-24
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• 2011

The convergence of education and game came from efforts to compensate for the boredom of learning. As the digital technology has been developed, this new integrated field accrued to the birth of the Educational Serious Game. It has been noted on both side of industry and academic research. Despite all natural concerns, studies of the educational Serious Game tend to show the partial directivity on the learning aspects rather than the nature of the Educational Serious Game. Therefore in this study the combination aspects of fun and learning in the Educational Serious Game through various case studies is to analyse.

• The Journal of the Korean dental association
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• v.41 no.10 s.413
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• pp.702-709
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• 2003

• Journal of Korean Classical Literature and Education
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• no.33
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• pp.255-283
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• 2016

There are different variations in folktales. Sometimes folkltales are combined with another folktales. This is probably done to make it an object-oriented narrative in which an epic attempt is made to strengthen an issue that was not resolved earlier, or a context that was not completed. The wood cutter and the heavenly maiden and Snail bride, are commonly noted for their gender relationship. These tales represent issue of continuing relationships between men and women. Particulary, how in the process of doing so, they succumb to their desires. This striving for lasting relationships does not end happily because "the man" in each case was immature and not able to think clearly. Other folktales were combined with these tales to resolve this problem. The man was transformed into a mature person and the wrongdoer's excessive greed was punished. The narrative of the folktales was changed to bring out the epic of growth, or the epic of punishment. This can be understood through the concept of narrative scheme. Folktale combinations in narrative schemes can be used effectively in narrative education.

• Annual Conference on Human and Language Technology
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• 2007.10a
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• pp.216-227
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• 2007

본고는 서로 다른 용어와 기준들로 일관성 없이 나열되어 있던 이전의 '-이나'의 의미 해석을 통합적으로 설명해 보고자 한다. 즉 특정한 양상 척도(개연성, 희구성, ${\ldots}$ 등)을 이용하여 '-이나'가 쓰인 맥락에 따라 척도 함축을 해석해 내고자 한다. 따라서 본고는 교착어의 특성을 가진 한국어의 특수조사(혹은 한정사) '-이나'의 함축 해석에서 척도의 유형을 분류함으로써 의미 해석과 형식화의 초석을 다지는 연구가 될 것이라고 기대한다. 먼저 '-(이)나'의 함축 해석에서 나타나는 척도의 유형에 대하여 논의하고자 한다. 따라서 '-(이)나'의 함축이 드러내는 척도들을 형식적으로'선형과 비선형'척도를 나누고 이러한 문장들이 들어내는 양상을 분류할 것이다. 둘째, 정대호 외(2002)에서 논의하고 있는 '~이나/도'가 분류사구와 결합한 문장이 화용론적인 개연성의 척도상에서 하한 값을 유발한다고 제안함에 따라, 본고는 양상을, 이러한 개연성의 척도를 포함한, '인식(진리, 원인, 지식, 평가), 의무(의지), 희구(기원)'의 3가지 양상으로 분류하고, 이에서 '-(이)나'가 유발하는 각각의 척도상의 함축을 기술할 것이다.

• Korean Journal of Microbiology
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• v.46 no.1
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• pp.104-108
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• 2010

We describe the construction of derivatives of wild type and mutant lrp genes that encode 6XHis-tag Lrps. These derivatives of wild type and mutant Lrp could be useful for in vitro studies including Lrp conformational changes. We show that 6XHis-tag Lrp wild type and 6XHis-tag Lrp R145W bind with similar patterns in vitro to 21 bp duplex DNA containing the consensus sequences of Lrp sites of upstream of the ilvIH operon. In addition, we report here the 6XHis-tag Lrp R145W is useful to investigate the conformational changes of Lrp in solution by using its own intrinsic fluorescence characteristics.

• The Journal of the Korea Contents Association
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• v.20 no.9
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• pp.648-658
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• 2020

In essence, Musical theatre is a multimedia show, so when you listen to musical numbers, you will experience it through multiple senses. Therefore, in order to analyze musical numbers, emphasis should be placed on its interaction with various media such as lyrics, dance, and theatre, which have a direct association with the music. Through the Conceptual Blending Theory, which can comprehensively consider the combination of text and music, the combination of movement and music, and the combination of visual elements and music, this study analyzes the music of Musical . By exploring the result of interaction between lyrics and music, the interaction between choreography and music, and the interaction between stage and music, the artistry and intrinsic value of the work can be proved. In addition, we can discover the process and system of integrated interpretation through music analysis applying Conceptual Blending Theory. Therefore, Conceptual Blending Theory has sufficient utility as a methodology for music analysis of musical theatre.