• 대한치과의사협회지
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• 제54권9호
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• pp.704-711
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• 2016

Radiologic images in dentistry are essential to perform the diagnosis, treatment, and tracking process of prognosis, thus the ability of accurate evaluation in the diagnostic images is requested for dental clinician. Radiologic interpretation means recognition of a normality and an abnormality and to report the possible diagnosis and differential diagnosis list. Therefore, dental clinicians should be familiar with the basic principle of interpretation of intraoral and extraoral radiographic images primarily used in dental clinics. Recently, dental cone beam CT is widely used for diagnositc process, thus understanding the three dimensional images is requested. The objective of this manuscript is to help the dental clinicians to interpret accurately the diagnostic images by introducing the basic principles of the step by step analytic process in the appearance of a lesion.

• 반도체디스플레이기술학회지
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• 제9권3호
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• pp.1-4
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• 2010

First-principles calculations based on spin density functional theory are performed to study the spin-resolved electronic properties of AlN doped with a Cu concentration of 6.25%-18.75%. The ferromagnetic state is more energetically favorable state than the antiferromagnetic state or the nonmagnetic state. For $Al_{0.9375}Cu_{0.0625}N$, a global magnetic moment of 1.26 mB per supercell, with a localized magnetic moment of 0.75 $m_B$ per Cu atom is found. The magnetic moment is reduced due to an increase in the number of Cu atoms occupying adjacent cation lattice position. For $Al_{0.8125}Cu_{0.1875}N$, the magnetism of the supercell disappears by the interaction of the neighboring Cu atoms. The nonmagnetic to ferromagnetic phase transition is found to occur at this Cu concentration. The range of concentrations that are spin-polarized should be restricted within very narrow.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.255.1-255.1
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• 2003

During our research program to find DNA strand-scission agents from higher plants, the MeOH extracts of the wood bark of Mucunar birdwoodiana Tutcher. (Leguminosae) exhibited the most potent activity with an IC$\^$50/ value of 4.9 $\mu\textrm{g}$/$m\ell$. Thus, detailed laboratory investigation was performed, and led to the isolation of the known compounds, catechin(1) and epicatechin(2) as the active principles. (omitted)

• 정보교육학회논문지
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• 제24권6호
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• pp.529-537
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• 2020

스크래치는 교육용 프로그래밍 도구로 초등학교 소프트웨어교육에서 많이 활용되고 있으며 스크래치를 활용한 수업이 학생들의 컴퓨팅 사고력, 문제 해결력 등에 도움이 된다는 연구 결과가 많다. 그러나 스크래치 사용자의 연령 통계 자료를 분석해본 결과 초등학교 저학년 학생들의 스크래치 활용도가 낮았으며 블록 프로그래밍 경험이 있는 고학년 학생들도 프로그래밍의 기본 원리인 순차, 반복, 선택의 개념을 이해하는 것에 어려움이 있었다. 따라서 본 연구에서는 손으로 만지면서 프로그래밍을 학습할 수 있는 스크래치 전자 블록과 전자 블록 활용 프로그래밍 교육 커리큘럼을 개발하였으며 초등학교 2학년과 6학년 학생들을 대상으로 수업을 진행하였다. 수업 전·후 프로그래밍에 대한 흥미도 검사를 진행한 결과 2학년 학생들의 흥미도는 3.28에서 3.58로 향상되었으며 6학년 학생들의 흥미도는 3.41에서 4.09로 증가하였다. 프로그래밍 기본 원리 이해 평가 결과 2학년 학생들 중 84%의 학생들이 주어진 과제 9개 중 7개 이상을 해결하였으며 6학년 학생들 중 62%이상의 학생들의 주어진 과제 9개 중 7개 이상을 해결하였다.

• 보건교육건강증진학회지
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• 제18권2호
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• pp.45-63
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• 2001

The objective of this study is to give basic materials for selection and improvement of contents of safety education, which is substantially helpful to elementary students, by analysis of contents of safety education in some subjects and assessment of the needs of elementary students for safety education. For this purpose, this study was analyzed the contents of safety education in five subjects for elementary school and conducted the survey of 883 students in some elementary schools in Seoul from April 7 to 22, 2000. The results were as follows; 1. As a result of analysis of the proportion of contents regarding safety-related education in some subjects, Physical Education occupied the highest proportion (14.09％), and that was followed by Practical Subject (9.55％) and Moral Education (9.34％). However, the proportions in Social Study and Natural Science were very low, 1.85％ and 1.31％ each. In total lines of these five subjects, the numbers of line regarding safety education was contained by 5.78％. 2. Analyzing the proportion of domains of safety education in five textbooks, the Meaning of Safety and Basic Principles occupied the highest portion (29.5％), and that was followed by the Home Safety (24.0％), the Safety in School (17.1％), and the Play and Leisure Safety (14.0％). The Coping with Accidents and First Aid, the Safety from Fire and Explosion, and the Traffic Safety occupied relatively low portion, 6.9％, 5.7％, and 2.8％ each. 3. As a result of analysis of the proportion of the safety education domain in each subject, the Meaning of Safety and Basic Principles occupied the highest portion (23.6％) in Moral Education, the Home Safety (12.7％) in Practical Subject, and the Play and Leisure Safety (10.9％) in Physical Education. 4. Most of the participants in this survey experienced the Home Accidents (71.1％). And also, they experienced the Play and Leisure Accidents (57.9％), the Accidents in School (49.7％), the Traffic Accidents (45.3％), and the Fire and Explosion Accidents (24.7％) in order. 5. In the average proportion of the needs of participants for safety education in each domain, the Coping with Accidents and First Aid has the highest point (4.05). And, that was followed by the Home safety (3.79), the Safety from Fire and Explosion (3.73), the Meaning of Safety and Basic Principles (3.65), the Play and Leisure Safety (3.50), the Safety in School (3.37), and the Traffic Safety (3.35). The average proportion of the needs for safety education of total domains was 3.66. 6. In the needs for safety education regarding the feature of participants, it showed higher scores in female students than male ones (p〈0.001), in lower grader than higher grader (p〈0.05), and in the students born to wealth than those born poor (p〈0.05). Also, the children who recognize the necessity of safety education showed higher scores of the needs for safety education (p〈0.001). And it also showed the same results of high score to the children whose parents did the safety education (p〈0.00l) and to the children and their parents who have the higher degree of practicing safety (p〈0.001), and these differences were statistically significant. 7. In the extent of preference for methods of safety education, it showed high score to the Field Learning, followed by the Audio- Visual Education, the Discussion, and the Instruction of teacher. In the extent of preference for subjects regarding the contents of safety education by each domain, it showed high score to the subject of Safety for 4 domains - the Meaning of Safety and Basic Principles, the Traffic Safety, the Safety from Fire and Explosion, and the Coping with Accidents and First Aid. And also, they preferred Moral Education for 2 domains - the Home safety and the Safety in School, and Physical Education for a domain of the Play and Leisure Safety. 8. While 27 of 36 detail items was contained the contents of safety education, the proportion of needs of participants for safety education showed more than average 3.00 score in 34 of 36 detail items. However, none of 9 detail items was included in five textbooks. Also, 2 detail items - the Coping with Disasters and the Safety from Poisoning - were included together 2 parts; One part had the higher ranked 7 items acquired by analysis of the needs, and the other had the higher ranked 7 items acquired by analysis of the contents. But, except those 2 items, none of items were matched with each part.

• 보건행정학회지
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• 제24권2호
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• pp.181-190
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• 2014

Background: Demands are recently rising for the securement of procedural justification of policy decision-making. This study aims to improve the procedure of making a decision to expand health insurance benefit package from the perspective of building a social consensus. Methods: Major priority principles were firstly derived through literature search. Weights for such principles were calculated through an analytic hierarchy process, based upon the survey conducted for the health policy experts. Priority for 11 non-covered services was assessed by applying the weights as above to the results of the questionnaire survey targeted at people including members of related committees or societies. Results: Weights for priority principles were in the order of 'severity/urgency (0.428)', 'cost-effectiveness (0.318)', 'substitutability (0.164),' and 'accountability (0.090)'. What was obtained by applying these weights to the results of the questionnaire survey was considerably in line with what health experts classified those items into 3 groups depending on their own judgement of service necessity (consistent with 9 services out of 11). Conclusion: Results of the study are suggestive as to how far a brief assessment by experts could be utilized in case there are constraints on time and expenses in implementing all the process to secure procedural justification. Various attempts and endeavors need to be made to secure procedural justification that will not mar efficiency of decision-making in the days to come.

• 대한한의학방제학회지
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• 제9권1호
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• pp.105-136
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• 2001

Objectives : 'Pi Wei Lun' is the principal medical work of Li Dongyuan's writings, which contains most of his medical theories. There are sixty-three prescriptions in 'Pi Wei Lun', and fifty-two of them were originated from him. This study was planned to present assistance to those who apply Dongyuan's theory clinically. Methods : We investigated those fifty-two prescriptions literary, and studied them from a viewpoint of the principle and method of treatment. Results : Dongyuan's fifty-two prescriptions can be classified into eight groups from the viewpoint of the principles and methods of treatment which are composed of 'tonify the spleen and stomach & elevate the spleen Yang', 'elevate the spleen Yang & expel fire', 'elevate the spleen Yang & relieve dampness', 'promote blood flow to eliminate blood stasis', 'invigorate the spleen', 'replenish Ki & and dispel phlegm', 'purgation with drugs warm in nature', and 'the other' eight methods. Conclusions : From above, we concluded that Dongyuan considered 'the primordial energy of the spleen and stomach' as the most important when making up prescriptions, but, at the same time, he used diverse methods of treatment on the ground of differentiation of syndromes.

• 한국전산구조공학회:학술대회논문집
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• 한국전산구조공학회 1995년도 봄 학술발표회 논문집
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• pp.9-16
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• 1995

A new three-dimensional transition solid element with drilling degrees of freedom is presented. The proposed transition element is established by adding variable nodes to a basic 8-node element for an effective connection between the refined region and the coarse. The derivation of the element in this paper is based on the variational principles in which the drilling rotations are introduced as independent variables. This element was also improved through the addition of modified non-conforming modes. Numerical examples show that performance of the element and the applicability to 3D adaptations are satisfactory.

• 음성과학
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• 제9권1호
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• pp.63-75
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• 2002

This paper examines the principles of the International Phonetic Association and its Alphabet to see if the International Phonetic Alphabet (the IPA, for short) is adequate for transcribing sounds of a language like Korean. Special attention is given to 'broad transcription' and it has been found that the IPA is inadequate in representing the phonemes: there is no way to correctly transcribe phonemically the sounds of Korean with the current alphabet. A suggestion is given to help solve this problem and extend the IPA to accommodate all the different languages of the world.

• Journal of Oral Medicine and Pain
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• 제25권1호
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• pp.9-28
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• 2000

The purpose of this article, the first part of series, is to describe the general theory applicable to various chromatographic procedures. History of chromatography, separation of matters, classification of chromatography, underlying principles of separation in chromatography, covering resolution, column efficiency, column selectivity, and capacity factor, movement of solute in chromatographic phase, including elution development, displacement development, and frontal analysis, were discussed. Mathematical description of plate theory and thermodynamic viewpoint of retention were emphasized.