폭풍시 사구의 침식각에 따른 해안단면의 침식에 관한 연구

이보형,표순보,이홍식,조원철 中央大學校 建設環境硏究所 1999 環境科學硏究 Vol.9 No.2

This EDUNE model developed by Kriebel was used for predicting storm-induced beach and dune erosion due to elevated water levels and waves. This model was based on the convolution integral involving a erosion-force function and an exponential erosion-response function. This numerical model adopted the equation of sediment continuity and a dynamic equation governing the cross-shore sediment transport due to a disequilibrium of wave energy dissipation levels. These equations are solved numerically by an implicit, double-sweep method to obtain the changes in position of elevation contours in the profile. In this study, the changes of a beach profile and dune erosion have been simulated for varying the dune erosion angle due to storm. The range of angle was 0.1~0.4 radian. It is shown that erosion rate is increasing according to the decrease of erosion angle.

좋은 인상을 위한 안면근육프로그램 연구

허순득,김선형 한국메이크업디자인학회 2008 한국메이크업디자인학회지 Vol.4 No.1

The overall facial image and skeletal structure, as well as the skin color, forehead, eyebrows, eyes, nose, cheekbone, philtrum, lips, and chin, play an improtant role in making a first impression. In addition to the inborn appearance of a person, therefore, a person's facial impression and his or her way of speaking can be essential in forming interpersonal relationships. The contraction and relaxation of the facial muscles create wrinkles, lines, and creases, which in turn make up diverse expressions. An effective facial-muscle training program that improves the blood circulation and balances the autonomic nervous system by training the facial muscles, which are very important in interpersonal relationships, was thus proposed in the paper. In other words, this paper suggests how to make a good impression based on a comprehensive investigation of the previous studies, domestic and foreign papers, journals, and general theories on the aforementioned subject matter.

경기도 일부 중학생의 체질량지수 및 성별에 따른 식생활 습관 및 영양소 섭취상태에 관한 연구

전형수;박용순 한양대학교 2007 韓國 生活 科學 硏究 Vol.27 No.1

Aim of this study was to investigate whether middle school students with different body mass index (BMI) and sex were different in their lifestyles and nutrient intake. Middle school students (n=408) in Gyenggi-do were participated in this stsudy. Height, weight and BMI of female students were 159.6㎝, 50.4㎏, and 19.7 ㎏/㎡, and those of male students were 165.5㎝, 57.7㎏ and 20.9㎏/㎡, respectively. Classified by BMI, there were 30% underweight, 51% normal, and 18.9% overweight. Reading time of underweight group was significantly shorter than those of overweight. More underweight students thought themselves healthier and had more appetite than overweight subjects. Male students used computer significantly longer and ate more on time, but had more unbalanced diet than females. Male students consumed more calorie, protein, vegetable protein, vegetable fat, carbohydrate, sodium, vitamin B1. Intakes of fiber and calcium were lower than the Dietary Reference Intakes for Koreans for that age group. Our results suggested that students had meal not on time, unbalanced diet, and meal too fast. Intakes of protein, fat, and sodium were higher, but intakes of calcium and fiber were too low. Those may cause serious health problem. Thus, students and health care providers should recognize the problems and develop education programs to help students to keep proper life style and eating habits.

좋은 인상을 위한 안면근육프로그램 연구

허순득,김선형 한국메이크업디자인학회 2007 한국메이크업디자인학회지 Vol.3 No.3

The overall facial image and skeletal structure, as well as the skin color, forehead, eyebrows, eyes, nose, cheekbone, philtrum, lips, and chin, play an important role in making a first impression. In addition to the inborn appearance of a person, therefore, a person's facial impression and his or her way of speaking can be essential in forming interpersonal relationships. The contraction and relaxation of the facial muscles create wrinkles, lines, and creases, which in tum make up diverse expressions. An effective facial-muscle training program that improves the blood circulation and balances the autonomic nervous system by training the facial muscles, which are very important in interpersonal relationships, was thus proposed in this paper. In other words, this paper suggests how to make a good impression based on a comprehensive investigation of the previous studies, domestic and foreign papers, journals, and general theories on the aforementioned subject matter.

원격탐사를 위한 병렬계산 기법

김형중,장태정,김희원,김형수,이정문,장순자 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-

원격탐사에 사용되는 편미분방정식을 고속으로 풀기 위한 기법을 프로그래밍하고 성능을 향상시킬 수 있는 방법을 제시했다. 미지수가 30만개 이상되는 복소수(non-Hermitian) 행렬의 해를 구하는 프로그램을 작성했다. 이 프로그램은 C와 PVM에 기반을 두고 있다. 수렴속도를 향상시키기 위해 대각 스케일링을 이용했다. 통신속도의 개선을 위해 데이터 압축 기법을 이용했다. 수렴속도를 측정 제시함으로써 실제 문제 적용에 참고할 수 있다. Network-based computing with cluster of personal computers or workstations recently has become an important and successful technique. Network-based computing enables fast computation and resolves short of storage with computers on the desks. Cluster of inexpensive computers offers them aggregated computing power and storage to challenge very large-scale problems. Iterative solvers are used for the large sparse linear systems. Preconditioners accelerate the rate of convergence of the iterative solvers. However, parallelization accelerate the rate of convergence of the iterative solvers. However, parallelization of preconditioners is far from satisfaction so far. Thus, the simplest diagonal scaling is a good alternative for improved convergence and easy parallelization. In order to reduce communication overhead, a data compression technique is considered. Data communication time can be reduced at the cost of convergence rate. MATLAB simulation result is given in this paper. This method is effective to cluster of computers connected through slow networks.

敎育自治와 住民參與

李淳珩 濟州大學校 社會發展硏究所 1989 社會發展硏究 Vol.5 No.-

무선인터넷 컨텐츠 사용실태에 관한 분석

홍순구,박순형 동의대학교 경제경영전략연구소 2004 經濟經營硏究 Vol.2 No.2

At the end of the 20th Century, the Internet along with development of communication technology, is becoming the core of competitiveness in the global business. As the technology has been developed and generalized, the Internet has been extended for use on mobile phones. However, usage of mobile Internet in Korea remains limited on portable phones, only as a data communication tool. Thus, various mobile Internet contents should be offered to enhance the useag of the mobile Internet. According to a prior study, the mobile Internet is mostly used by young people in their late teens and 20s. The purpose of this thesis is to research the mobile Internet usage to analyze the condition of using mobile Internet content for college students and to derive suggestions of the mobile Internet in the future. The result showed, first, the majority of respondents, 78%, said, in regards to price satisfaction, that the mobile Internet is expensive to use. Secondly, the respondents generally think that the quality of service and of connection to the mobile Internet is only average in quality. Thirdly, the respondents are satisfied with the seven content services (communication, personalization, offering information, entertainment, reservation, finance, and education) that are provided for their use on the mobile Internet. The study showed that technology problems, a reasonable price system and various content developments are urgently needed to activate the market of the mobile Internet services. This study will be a very interesting field for establishing and developing content models to activate a mobile Internet in a sphere of study.

내용기반 영상 검색 유효성을 측정하는 방법들에 대한 비교(Precision/Recall vs. Wilcoxon rank Test) : Comparison of Retrieval Effectiveness between Precision/Recall and Wilcoxon Test

장순자,김형중,여인권 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

영상검색은 문자위주의 검색의 한계로, 그 내용에 기반 한 특징벡터를 이용하여 검색을 수행한다. 특징벡터간의 거리를 계산하고 그 값들에 순위를 매긴다. 이렇게 얻어진 순위 값들을 가지고 사용된 검색방법의 유효성을 검사하는데 Recall/Precision방법이 이용되고 있다. 질의영상과 같은 군에 속하는 영상이 얼마나 검출되었는지를 검출된 영상에 기반 하여 계산하거나, 영상 군에 기반 하여 계산하는 방법들이다. 그러나, 검출되는 순위 값의 범위를 정하고, 그 범위 내에 속하는 만족하는 값의 개수를 세는 방법을 이용한다. 따라서 주어진 두 샘플의 전체적인 경향을 비교하지는 못한다. 본 연구에서는 순위를 이용하여 비교하고자하는 두 샘플의 순위들을 결합하여 순위를 매기고 각 샘플들에 매겨진 순위값들의 평균과 분산을 이용하여 각 샘플들을 전체적으로 비교할 수 있다. Retrieval effectiveness of content-based image is usually measured by "recall and precision" method. The method has disadvantages such that it depends on the number of considered images among retrieved ones. We propose the Wilcoxon rank test for measuring retrieval effectiveness instead of the recall and precision.

단근치와 다근치의 치은연하치석제거 및 치근면활택술 시행에 따른 치주낭 깊이 변화에 관한 연구

김형석,심형순,김병옥 조선대학교 구강생물학연구소 2003 Oral Biology Research (Oral Biol Res) Vol.27 No.1

The Primary factor of periodontal diseases is bacterial plaque. En the treatment of periodontitis, removal of subgingival calculus is an essential factor in the successful treatment. The purpose of this study was to evaluate the clinical effects over 3 weeks, 6 weeks and 9 weeks following sealing and root planning. This study was carried out on 14 individuals with periodontitis. For this study, 91 teeth were selected. The subjects were separated into three group on the basis of initial probing depth(PD). These were consisted of group I(PD(3㎜). group Ⅱ(3mm(PD(6mm) ,group Ⅲ(PD)6mm). Probing depth were recorded on baseline, 3weeks, 6weeks and 9weeks after scaling and root planning. All data analyzed statically. The results were as follows 1. For single rooted teeth of group Ⅱ and Ⅲ, there was statistically significant decrease in probing depth according to time course, tooth position than baseline(p<0.05). 2. For multirooted teeth of group Ⅱ and Ⅲ, there was statistically significant decrease in probing depth according to time course. tooth position than baseline(p<0.05). 3. For single and multirooted teeth of group Ⅰ, there was not statically signiftcant decrease in probing depth(p>0.05). 4. Between single and multirooted teeth. there was not statistically significant decrease in probing depth(p>0.05).

PC를 이용한 2축 구동시스템개발

권순호,김교형 嶺南大學校 工業技術硏究所 1997 工業技術硏究所論文集 Vol.25 No.1

본 연구는 X-Y테이블을 스테핑 모터로 구동하여 시일드를 파렛에 적재하기 위한 시스템을 구성하는 것으로서 X-Y테이블에 조립된 파렛의 움직임을 여러경로의 시일드적재에 적용할 수 있도록 하였다. 본 연구를 통해 차분에 의한 직선제어 방식의 알고리즘을 제안하였으며, 이 알고리즘에 의해 제어되는 복잡다양한 경로를 PC에서 다운로드 받아 처리할 수 있는 시스템을 구성하여 시일드적재장치에 적용함으로써 유연생산시스템을 구현하였다. Tow axis driving system was developed to establish flexible loading system of shield which is a part of electronic equipment, on pallet. Driving of two stepping motors is accomplished by Z-80 single board microprocessors. Moving trajectories of x-y atble are developed by personal computer and downloaded to single boad through RS232C serial communication port. Developed system has shown flexible movement as expected to laad shield on pallet automatically.