• KSII Transactions on Internet and Information Systems (TIIS)
• /
• 제10권4호
• /
• pp.1824-1845
• /
• 2016

The GMM is a conventional approach which has been recently applied in many face recognition studies. However, the question about how to deal with illumination changes while ensuring high performance is still a challenge, especially with real-world databases. In this paper, we propose a Visual Observation Confidence (VOC) measure for robust face recognition for illumination changes. Our VOC value is a combined confidence value of three measurements: Flatness Measure (FM), Centrality Measure (CM), and Illumination Normality Measure (IM). While FM measures the discrimination ability of one face, IM represents the degree of illumination impact on that face. In addition, we introduce CM as a centrality measure to help FM to reduce some of the errors from unnecessary areas such as the hair, neck or background. The VOC then accompanies the feature vectors in the EM process to estimate the optimal models by modified-GMM training. In the experiments, we introduce a real-world database, called KoFace, besides applying some public databases such as the Yale and the ORL database. The KoFace database is composed of 106 face subjects under diverse illumination effects including shadows and highlights. The results show that our proposed approach gives a higher Face Recognition Rate (FRR) than the GMM baseline for indoor and outdoor datasets in the real-world KoFace database (94% and 85%, respectively) and in ORL, Yale databases (97% and 100% respectively).

• 한국과학교육학회지
• /
• 제20권1호
• /
• pp.101-111
• /
• 2000

6차 교육과정 개편 이전에 임용된 교사들의 경우 목표 달성을 진단하는 과학 평가에 관한 기본 지식에 대한 이해가 낮은 경향을 보여 주었다. 예를 들면, 관찰하는 방법을 알고 있는 것은 지식이며, 관찰 활동을 실천하는 관찰 능력은 탐구 기능인 것인데 오개념으로 작용하는 경향을 발견할 수 있었다. 현장 수업중에 제시한 학습 목표는 수업 후 목표 달성 여부를 평가하여야 하는데 목표에 부합되지 않은 문항으로 형성 평가를 하는 경향이 나타나고 있었다. 태도 영역 평가의 객관성 확보 방법이 여전히 어려운 과제로 대두되고 있어 이에 관한 개선이 절실함을 알 수 있었다. 6차 또는 7차 교육과정에서 지식, 기능, 태도 3영역의 균형있는 평가를 제시하고 있어 어느 정도 개선되었으나 현장에서는 수행 평가 도입으로 탐구 기능의 평가 비율을 높여 더욱 균형있는 3 영역의 평가가 이루어 질 수 있는 방향으로 개선되고 있는 추세이다.

• 동의생리병리학회지
• /
• 제28권2호
• /
• pp.154-161
• /
• 2014

The purpose of this study is to evaluate the antioxidant activity and hair growth effects of a natural herbal ethanol extract, Samhwang-Sasimtang(SS). In case of antioxidant ability of SS, the content of phenolic compounds was 28.44mg/g. The extract showed strong electron donating ability and free radical scavenging activity in a concentration-dependent manner. SOD-like activity also rose through increasing the concentrations of SS. In order to estimate the hair growth effects, the extract was applied to the back of seven-week-old C57BL/6 male mice ($150{\mu}{\ell}$ a day, five days a week, for four weeks) in four groups (C, control, saline; PC, positive control, 3% minoxidil; E1, experimental 1, 1% SS; E2, experimental 2, 2% SS). Ten mice were assigned to each group and five mice in each group were sacrificed at weeks 2 and 4, respectively. There was no a significant difference in body weight change among experimental groups. In macroscopic observation of hair growth at week 4, the scores of hair growth on the backs of mice were 80, 60, 40 and 20% in the PC, E2, E1 and C groups. In terms of histological observation, the ratio and thickness of hair follicles, the enzyme activities of ALP and ${\gamma}$-GT, immunohistological examination of IGF-1 and VEGF which are the hair growth factors, in each group were significantly high in this order: PC, E2, E1 and C group, at week 4. Meanwhile, hair growth inhibition factors, TGF-${\beta}1$ and Caspase-3, were reduced in PC, E1 and E2 groups compared with C group. These results indicate that SS extract may be effective in promoting hair growth, and suggest that it can be used practically as a superior natural agent for hair growth promotion.

• 한국산학기술학회논문지
• /
• 제18권10호
• /
• pp.634-641
• /
• 2017

본 연구는 감각통합치료가 감각처리능력의 어려움을 가진 지적장애아동의 사회행동과 식사하기에 미치는 효과를 알아 본 사례연구이다. 연구기간은 2016년 9월부터 12월이며, 개별실험연구 방법 중 ABA 설계를 사용하였고 각각 2회기, 9회기, 2회기로 총 13회기 진행하였다. 감각통합프로그램은 50분씩 9회기 진행하였고 윌버거프로토콜(Wilbarger's Protocol)을 하루 2~3회씩 실시하였다. 아동의 기초적 발달 수준을 알기 위해 영역별 관찰 평가와 사회성숙도검사를 초기에 실시하였다. 아동의 감각처리능력을 알아보기 위해 감각프로파일(Sensory Profile: SP)을 실시하였으며 일상생활수행능력과 작업수행 능력정도를 일상생활평가(Functional Independence Measure for children; WeeFIM)와 캐나다작업수행측정(Canadian Occupational Performance Measure;COPM)을 통해 각각 평가하였다. 아동의 사회행동인 탐색행동과 식사하기는 관찰을 통해 측정하였다. 연구결과 감각통합프로그램이 아동의 사회행동을 증가시키고 식사하기를 가능하게 하는데 긍정적인 효과가 있었다. 아동의 식사하기는 중재 후 5회기부터 안정적으로 가능하였으며, 탐색행동은 중재 후 3주 후부터 변화를 보이기 시작해 7주 후 부터는 안정적인 탐색행동을 나타냈다. 이러한 결과는 감각처리능력에 어려움을 가진 지적장애아동이 일상생활에서 겪는 어려움을 중재하는데 감각통합프로그램이 효과적임을 말해 준다.

• 한국의류학회지
• /
• 제12권1호
• /
• pp.13-26
• /
• 1988

As the culture develops, the body of children nowadays improves, but their physical fitness is weaker than that of children in the past. If physical fitness strengthens through clothing, this must be the easiest and the most efficient long-range training method. To find out the solutions on the above mentioned problems through clothing, this study was made for the analysis of the correlations of clothing weight and physical fitness. The children's endurance upon cold can be explained by the physical fitness, and has relation with the clothing insulation. Therefore, motor ability was measured as an index of physical fitness and clothing weight was measured as an index of insulation. This observation was made in Spring and Fall, 1985, in which 339 kindergartners and their mothers were the subject. The results of the study were as follows: Physical fitness of children decreased in proportion to the clothing weight, and especially this can be seen in boys rather than in girls, and in Fall rather than in Spring. In case of the children who spent more time outdoors rather than indoors, who played in larger space, and who didn't have meat frequently, it turned out that their clothing weight was surprisingly lessened and their physical fitness was highly food.

• 대한수학교육학회지:수학교육학연구
• /
• 제10권2호
• /
• pp.229-246
• /
• 2000

The purpose of this paper is to compare and analyze the two different teaching methods of elementary mathematics in the traditional method and in the constructive view. To do so, the actual class in the constructive view has been made for about four months using a class of 45 students in the second grade of an elementary school. After the class was finished, we collected diverse data from the class, such as the responses from the children(self-evaluation, mathematics diary, observation by the investigator, daily report), class evaluation report by other teacher and so on. The results of this research are as follows: First, the traditional class reaches at the goal of learning in a unit time because the class is guided by the teacher but the class in the constructive view is a little flexible because it is contextual. Second, in the constructive process of mathematical knowledge we knew that small group activities or discussion without intervention of teacher was often ended in exhaustive argument without arriving at valid social consensus. Third, the attitude in mathematics was changed from the passive one to the self-regulated ones. Fourth, the class in the constructive view could extend not only the ability of mathematical communication but also the ability of self-directed learning of children. Fifth, it was a considerable change the role of teacher, that is, guide of instruction instead of unique specialist in the classroom. Sixth, finally, the evaluation was made after finishing a unit class in the traditional instruction but it was integrated in a class in a constructive view.

• 대한지구과학교육학회지
• /
• 제8권1호
• /
• pp.76-86
• /
• 2015

The purpose of this study is to take advantage of the smart teaching - learning programs about the unit of 'Earth and Moon' and find out how to apply the effect appears. Teaching-Learning program was conducted over eight lessons. And we analyzed the effect of the program at any time through the evaluation and interview. The results are as follows. First, this study proposed a method to assist in the teaching and learning of spatial ability for students' movement of the Earth and the Moon. The program takes advantage of N-Screen Applications were configured to allow both Earth observation insider perspective and the external multilateral perspective. This improves students' understanding qualitatively. Second, we applied the teaching and learning programs utilizing smart smart devices, and the result was a lot of low rank students' average score rises. In addition, we were able to see that many students' understanding and interest, self-confidence are improved.

• 감성과학
• /
• 제20권1호
• /
• pp.41-48
• /
• 2017

This study was conducted to develop wearable products with visual and auditory feedback aimed at promoting exercise interest in children. Here we determined the theoretical characteristics of cognitive and motor function development during childhood, empirical characteristics of children's motor functions, and factors that encourage exercise using natural observation and in-depth interview research methods. The questionnaire assessed children's motor ability, intensively trained body parts in sports programs, types of training or classes that improve the motor ability of each muscle group, significantly considered aspects of children's sports programs, and factors that promote children's interest in exercise. Our results suggest that the development of sport programs comprising varied exercise options that enhance body and limb movements are needed for balanced growth. Furthermore, it is very important to provide motivation for regular exercise and appropriate feedback, such as praise and encouragement, to maintain interest in exercise. This study identifies the standards for developing products that peak children's interest in exercise and the basis for a physically and mentally healthy society.

• 대한치과보철학회지
• /
• 제16권1호
• /
• pp.38-44
• /
• 1978

Color is an important factor in dental esthetics. Application of natural tooth color will not fail to produce pleasing results. But a standardized method of shade matching has not been adopted. If we are to overcome the color matching problem in dentistry, an understanding of the nature of color and light is essential. The purpose of this study was to compare the effects of different light sources and different background colors on the ability of observers to correctly match shades of artifical teeth. And observation was made to determine if the time spent in making a shade match was a factor in the correctness of the response. A test method was devised and 50 individuals made observations which were recorded and analyzed. $X^2$-test gave results indicating that the time factor had no effect on the response made. An analysis of variance showed the following effects significant at the five percent level; (1) light source (2) background color (3) subject. The following conclusions can be drawn from this study; (1) The time spent in making shade selection is not a factor in the correctness of the selections. (2) The light source used is an important factor in matching tooth shade; and there is no significant difference between the light sources in shade matching. (3) Under the conditions of this study, the greatest accuracy in shade matching was obtained on the brown background.

• 한국주조공학회지
• /
• 제19권5호
• /
• pp.410-418
• /
• 1999

To overcome the undesirable deformation, peeling off and geometrical restrictions which were mainly caused by differences in thermal expansion coefficients during the cladding of aluminum strip and stainless strip, new processing method based on vacuum die casting is designed and implemented in fabricating Fe-17wt%Cr steel (stainless steel). To increase cast-bonding ability, the surface of Fe-17wt%Cr steel is electrochemical etched to have optimum pit size (above 0.2 mm) and pit density (above 30%). The implementation of vacuum die casting by using surface treated stainless steel (Fe-17wt%Cr Steel) produces good trial products having acceptable cast-bonding ability. The enabling conditions for cast-bonding are pouring temperature $690^{\circ}C$, filling speed 30 m/sec and casting pressure $800\;kg/cm^2$. The microscopic observation of cast-bonded Al/Fe-17wt%Cr steel does not show any evidence of intermetallic compounds. The bonding strength of trial products is $150-400\;kg/cm^2$ and this is stronger than conventionally cladded metal having $30-70\;kg/cm^2$.