• Journal of Oral Medicine and Pain
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• 제3권1호
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• pp.11-22
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• 1977

In order to evaluate the normal eruption time of the Korean permanennt teeth, the author had examined the eruption phases of permanent first molars in 778 males and 653 female children aged from 5 to 9-year old and analysed. The eruption was divided into 4 phases; the tip of the crown can be seen, the dull occlusal surface of the crown can be easily seen, the crown is not in contact with its antagonist, and the crown is in contact with its antagonist. The obtained results were as follows : 1. It seemed that percentage of the eruptingand erupted permanent first molar in female by age was higher than that of male. 2. In general, percentage of the erupting and erupted permanent first molar by age was higher than that of upper first molar. 3. In the correlation of age with the eruption phase, the regression equation were "y=0.43x+5.61" on male upper first molar, "y=0.41x+5.60" on male lower first molar, "y=0.44x+5.47" on female upper first molar, and "y=0.38x+5.57" on female lower first molar respectively.n female lower first molar respectively.

• 한국응급구조학회지
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• 제12권2호
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• pp.45-58
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• 2008

This study examined the knowledge and health education about First Aid of Physical Education College Students. The survey had been done from September to November, 2007. Total subjects in this study were 193. The collected data were analyzed by SPSS. The results of the study were as follows : 1. Among total 193, 74.6% were male, 25.4% were female, 1st grade were 38.9%, 2nd grade were 61.1%. 58% of the subjects had not been trained first aid education. 2. For needs assessment about first aid education contents, the needs for first aid was high(2.36) of the lecture, and assessment of emergency situation(2.65) was high of the practice. Legal problems of first aid was low of the lecture and practice. 3. An average the knowledge score of the subjects was 55.1088(${\pm}19.09$) when the knowledge score of subjects converted 100 points. 4. There were significant difference in the knowledge of first aid according to subject's gender(t=2.907, p= .004), grade(t=-7.167, p= .000), and experience of first aid education(t=5.174, p= .000). These results will provide the base data for the development of first aid education program for physical education college students.

• Child Health Nursing Research
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• 제14권2호
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• pp.163-175
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• 2008

Purpose: The purpose of this study was to provide basic data to develop first aid education programs for elementary, middle and high school students. Method: Forty nine textbooks adopted by first to six grade elementary schools and first to third grade of both middle and high schools were analyzed for content on first aid. Results: 1) First aid content was covered only in courses on and 2) Content on first aid was included in the categories, "General of first aid", "Rescue & moving", "Fire & Burns", "Cardiopulmonary resuscitation", "Musculoskeletal injuries", "Thermal injuries", "Wounds", "Removing foreign bodies", "Disaster & Accidents" and "Others". Categories that were not included were "Poisoning" and "Bites". The content did not follow a progression related to the level of intellectual and physical development of the students. Conclusion: These results suggest that the content on first aid should be revised to be practical and rational for the benefits of student safety.

• 한국통신학회논문지
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• 제36권1C호
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• pp.37-47
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• 2011

본 논문에서는 다중 입출력 (multiple-input multiple-output: MIMO) 시스템을 위한 깊이 우선 탐색과 (depth-first search) 너비 우선 탐색의 (breadth-first search) 혼용을 바탕으로 한 복호 기법을 제안한다. 제안된 기법은 먼저 탐색 트리를 여러 단계로 나눈 뒤, 깊이 우선 탐색과 너비 우선 탐색 기법 모두의 장점을 이끌어 낼 수 있도록 두 기법의 유기적인 적용을 통하여 각 단계를 탐색한다. 또한, 성능 평가를 통해 두 탐색 기법이 적절히 적용되었을 때, 기존의 복호 기법들보다 상당히 낮은 연산 복잡도를 갖는 것을 확인할 수 있다.

• 패션비즈니스
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• 제9권2호
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• pp.100-112
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• 2005

Although Korean first ladies are not very big in changes in their hair style, American first ladies have greatly influenced clothing as well as hair style, exercising their influence over the apparel industry and fashion. Historically, American first ladies' fashion tastes have been on the center of attention and taken the lead in fashion. Although Korea first ladies' hair style are not very new or sensible enough to lead the fashion among the public, they have a sense of fashion and some influence on women of the upper classes. Beauty artists creating first lady hair style are representative of the times and have great value to the research. However, this study will not concentrate on their research. This study will analyze Korea first ladies' hair style, examine hair design and hair technique in fashion in those days. This study intends to provide important materials for Korean beauty history that has not been established by systematically arranging fashion style in the times analyzed through first ladies' hair style. Also, this study aims at researching in the aspect of beauty aesthetic concept through analyzing Korea first ladies' hair style.

• 한국응급구조학회지
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• 제24권2호
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• pp.155-162
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• 2020

Purpose: The aim of this study was to suggest the qualification criteria for the instructors of first aid education for teachers in the School Health Act. Methods: We compared and analyzed the approval provisions for qualifying as first aid educators under the School Health Act, the Emergency Medical Services Act, and prior studies of first aid education. Results: The comparison of the studies demonstrated some key points. First, the first aid education of teachers could be improved through the knowledge of professional instructors. Second, the doctors, emergency nurse practitioners, and emergency medical technicians (EMT) were suitable as specialized first aid instructors. Third, for qualifying as first aid instructor, only the EMTs required more than five years of career. Conclusion: We suggest that all emergency medical service providers qualify to become first aid educators. Additionally, the requirement of EMTs to have more than 5 years of career to qualify as an instructor should be eliminated.

• 한국물환경학회지
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• 제34권6호
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• pp.650-660
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• 2018

The objective of this study was to compare the rainfall-runoff characteristics in streams of classified urban and rural watershed using land use and population density. EMC (event mean concentration) of BOD, COD, TP and SS increased significantly in urban and rural watershed, but that of TN remained unchanged. Although there were no significant differences in EMC of BOD, COD, TN, TP depending on the watershed characteristics, EMC of BOD and COD significantly increased in the urban watershed, while EMC of TP increased in the rural watershed. In the urban watershed, the first flush time was faster and the first flush effect was stronger in BOD, COD, and TP. However, the difference between cumulative mass and cumulative volume was found to be less than 0.2 in the rural watershed, indicating a weak first flush effect. The discharged masses of BOD (70 %), COD (64 %), and TP (66 %) in the first flush of runoff were higher in urban watershed, while TN (67 %) was higher in rural watershed. The reproducibility of first flush time and the strength of first flush using CV (coefficient of variation) was found to be more reproducible for first flush time in both watersheds. In rural watershed, the CV value of first flush time for TP out of water quality parameters was lower. Whereas the CV values of first flush time for BOD, COD and TP in urban watersheds were similar.

• 대한수학회지
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• 제42권5호
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• pp.1031-1056
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• 2005

In this paper, we define the conditional first variation over Wiener paths in abstract Wiener space and investigate its properties. Using these properties, we also investigate relationships among first variation, conditional first variation, Fourier-Feynman transform and conditional Fourier-Feynman transforms of functions in a Banach algebra which is equivalent to the Fresnel class. Finally, we provide another method evaluating the Fourier-Feynman transform for the product of a function in the Banach algebra with n linear factors.

• 호남수학학술지
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• 제39권4호
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• pp.465-473
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• 2017

In this paper, we define a totally umbilic hypersurface of first order and show that a totally umbilic hypersurface of first order in an Einstein manifold has a parallel second fundamental form. Furthermore we prove that a complete, simply connected and totally umbilic hypersurface of first order in a space of constant curvature is a Riemannian product of Einstein manifolds. Finally we show a proper example which is a totally umbilic hypersurface of first order but not a totally umbilic hypersurface.

• 대한수학회지
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• 제43권5호
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• pp.967-990
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• 2006

In this paper, we evaluate first variations, conditional first variations and conditional Fourier-Feynman transforms of cylinder type functions over Wiener paths in abstract Wiener space and then, investigate relationships among first variation, conditional first variation, Fourier-Feynman transform and conditional Fourier-Feynman transform of those functions. Finally, we derive the conditional Fourier-Feynman transform for the product of cylinder type function which defines the functions in a Banach algebra introduced by Yoo, with n linear factors.