• Journal of Korean Clinical Health Science
• /
• v.7 no.2
• /
• pp.1337-1344
• /
• 2019

Purpose. This study was the analyze the refractive status of presbyopia in Korea. Methods. The subjects was from November 2018 to October 2019, two hundred thirty four subjects( 117 male subjects, 117 female subjects; from 40-year old to 88-year old ) were performed in refraction test using the Auto-Refraction(Speed -K model, Japan). The myopia, hyperopia, astigmatism, and anisometropia were defined as spherical equivalent(SE)≤-0.50 diopters, SE ≥+1.00 D, cylinder error ≥0.75 D and SE difference≥1.00 D between binocular eyes, respectively. Results. The refractive status by spherical equivalent among all subjects was myopia 61.43%, astigmatism 86.86%, emmetropia 19.18%, anisometropia 12.07%, and hyperopia 18.54. The prevalence of myopia and astigmatism were much more common in male. However, The hyperopia and astigmatism were much more common in female. The prevalence of spherical equivalent was much common from -0.50 diopter to -5.00 diopter. On the other hand, the prevalence of astigmatism and myopia was much more than hyperopia in all subjects. There was a statistical significance between OD and OS of the female and male in the spherical equivalent power(p<.000). However, there was not statical significant between female and male of OD and OS in the spherical equivalent power(p<.070). On the other hand, The prevalence of againest axis in astigmatism was more common in all subjects. In ADD power for the near vision correction, the female was much more diopter than male. Conclusions. These results suggested that the analysis of the refractive status on the presbyopia in Korea can give the useful diagnosis data for the correction of visual acuity at near distance.

• Journal of Korean Biological Nursing Science
• /
• v.14 no.3
• /
• pp.156-165
• /
• 2012

Purpose: This study was conducted to test the effect of the Hand Hygiene Education Program on hand hygiene knowledge, hand hygiene perception, nasal Staphylococcus aureus colonization and hand hygiene adherence in nursing students. Methods: A non-equivalent pre-post test of quasi-experimental design was used. 87 second grade nursing students participated in the study with 43 in the experimental group and 44 in the control group. We used the Hand Hygiene Education Program which was held 5 times over 5 weeks, taking 60 minutes per session. For the analysis, descriptive statistics, chi test, and t-test were used for statical analysis with SPSS 19.0. Results: There were significant increases in hand hygiene knowledge (p=.004) and hand hygiene adherence (p=.002) and there was a significant decrease in nasal Staphylococcus aureus colonization (p=.026) in the experimental group compared to the control group. However, hand hygiene perception (p=.543) was not significantly changed. Conclusion: Findings of this study suggest that the Hand Hygiene Education Program may be effective in enhancing hand hygiene knowledge and hand hygiene adherence. Also this program was effective in reducing nasal Staphylococcus aureus colonization in nursing students. Further studies are needed to evaluate the effects of the Hand Hygiene Education Program on hand hygiene perception in nursing students.

• Archives of design research
• /
• v.12 no.4
• /
• pp.305-315
• /
• 1999

Most people react emotionally and are impressed for natural seen such as act, paint, sculpture, music, science, discovery, act include movie, opera. For empathy, people should make efforts feeling about sense from watching by themselves. Usually we are looking for meaning from art and intend to relate wth the content of music, drama, paint, and movie. The trend of statical order in modern design is strong in this time. However, we need to research the motive order for progressive design. And also, designer who want to give motive order to something must need to study motive order in design. This thesis explains the way of effective approach so that designer can apply the thinking such like bring in emotion. Also this research introduces the way of thinking to do progressive imagination and try to research through case study.

• Journal of Electrical Engineering and Technology
• /
• v.11 no.4
• /
• pp.993-1002
• /
• 2016

Hepatitis is a major public health problem all around the world. This paper proposes an automatic disease diagnosis system for hepatitis based on Genetic Algorithm (GA) Wavelet Kernel (WK) Extreme Learning Machines (ELM). The classifier used in this paper is single layer neural network (SLNN) and it is trained by ELM learning method. The hepatitis disease datasets are obtained from UCI machine learning database. In Wavelet Kernel Extreme Learning Machine (WK-ELM) structure, there are three adjustable parameters of wavelet kernel. These parameters and the numbers of hidden neurons play a major role in the performance of ELM. Therefore, values of these parameters and numbers of hidden neurons should be tuned carefully based on the solved problem. In this study, the optimum values of these parameters and the numbers of hidden neurons of ELM were obtained by using Genetic Algorithm (GA). The performance of proposed GA-WK-ELM method is evaluated using statical methods such as classification accuracy, sensitivity and specivity analysis and ROC curves. The results of the proposed GA-WK-ELM method are compared with the results of the previous hepatitis disease studies using same database as well as different database. When previous studies are investigated, it is clearly seen that the high classification accuracies have been obtained in case of reducing the feature vector to low dimension. However, proposed GA-WK-ELM method gives satisfactory results without reducing the feature vector. The calculated highest classification accuracy of proposed GA-WK-ELM method is found as 96.642 %.

• The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
• /
• v.17 no.2
• /
• pp.87-93
• /
• 2004

Objective: We would like to find out the correlation between acne distribution in the jaw and the emmeniopathy. Methods: The clinical studies were made on 43 cases of acne vulgaris who visited to Department of Dermatology, Dongguk University Gangnam Oriental Medical Hospital during from August, 2002 to July, 2004. We divided the patients into two groups. A group had the emmeniopathy. B group didn't have the emmeniopathy. In the acne grade and the number of acne, we investigated the difference between A and B group statistically. We used the statical methods of student's t-test on the number of acne and wilcoxon rank sum test on acne grade. Results: The mean age was 25.8${\pm}$4.80 in A group and 27.6${\pm}$5.68 in B group. There were painful menstruation, quality of thickness, menstrual cycle disorder, menstrual amount disorder, dark purple color, premenstrual acne in A group with the emmeniopathy. The acne grade was 1.69${\pm}$1.28 in A group, 1.43${\pm}$1.28 in B group. The number of acne was 3.66${\pm}$3.15 in A group, 4.36${\pm}$4.07 in B group. P-value was 0.52 in acne grade and 0.25 in the number of acne. We investigated no difference between A and B group statistically on acne grade and the number of acne. Conclusions: We needed the further study about the factor which affect on acne distribution and emmeniopathy.

• Analytical Science and Technology
• /
• v.20 no.5
• /
• pp.370-382
• /
• 2007

In this study, solid-phase microextraction (SPME) technique using GC/FID was studied as a possible alternative to liquid-liquid extraction for the analysis of EGBE, DGBE, DBM and TGME in water, and an optimization condition of trace analysis of EGBE, DGBE, DBM and TGME using the factorial design was described. Experiments used a fractional factorial design method followed by central composite design allowing optimization of a number of factors as well as statical analysis of results. The response surface analysis showed that the extraction efficiency can be described by a second-order polynomial equation in which the salts concentration, extraction temperature, extraction time and sonication time are the major influences. Using DOE, a new data-dependent method was developed that improved the quantity of confidently analyzed EGBE, DGBE, DBM and TGME in water samples.

• KSCE Journal of Civil and Environmental Engineering Research
• /
• v.30 no.3D
• /
• pp.199-204
• /
• 2010

The purpose of this study is to estimate the effectiveness of newly proposed guide sign system. Existing guide sign system on expressways in South Korea have point-based system with city, district names or land marks. They have also several problems as excessive amount of information, low use of exit number, and lack of lane designation arrows. Efficiency of existing guide sign system is deteriorated from these problems. The enhanced guide sign system is proposed to alleviate problems. The best alternative sign system is chosen from three different designs with preference survey and human factors evaluation. The new signs showed reduced time compared to existing signs with statical significance. The existing sign system conveys more information in farther distance and less information in nearer distance. Nevertheless new systems imparts more information i nearer distance. It is also suggested that lane designation signs should be established with overhead installation at 0m point for efficient direction choice.

• Journal of the Korea institute for structural maintenance and inspection
• /
• v.27 no.6
• /
• pp.201-210
• /
• 2023

This study is to evaluate the ductility strengthening effect of aramid fiber sheets on piloti-type structures. Two piloti-type structure specimens were prepared and tested under statical cyclic lateral loads. The ductility strengthening effect was validated from the analysis of lateral load-displacement relationship, displacement ductility ratio, work damage index and torsion behavior. Test results showed that the post-peak behavior of piloti-type structures with columns strengthened with aramid fiber sheets tended to be ductile resulting from preventing shear failure and minimizing torsion due to the effective lateral confinement of column concrete by aramid fiber sheet. Consequently, the displacement ductility ratio and work damage index of piloti-type structures with columns with strengthened with aramid fiber sheets were 4.63 and 42.81 times higher than those of non strengthened piloti-type structures.

• Journal of Korean Home Economics Education Association
• /
• v.27 no.1
• /
• pp.13-29
• /
• 2015

This study examined whether any differences were found in body comparison, body satisfaction, and appearance management behaviors according to socialcultural attitudes toward appearance among male and female adolescents in Gwangju and Jeolla province. It was conducted by a self-report survey of 598 male and female students in eigth and eleventh grades in Gwangju and Jeonnam province, South Korea. The collected survey data were analyzed by Cronbach's ${\alpha}$, Factor analysis, ${\chi}^2$ test, K-means cluster analysis, t-test, one-way ANOVA, Duncan's grouping using SPSS/PC WIN 19.0 statical program. The results were as the following: Adolescents perceived and internalized more highly than the common level the socialcultural value toward appearance, especially for female, and by age, juniors in high school than in middle school. Socialcultural attitudes toward appearance could be classified into four categories: 'Accepted type', 'internal type', 'aware type', and 'unaccepted type'. Students who were classified as 'accepted type', and 'internal type' showed lower level of body satisfaction and compared their bodies more often with others. They also actively received appearance management behaviors. Therefore, they showed positive attitude toward cosmetic surgery and functional garments. They also worked hard to reduce their weights just to show off to others. In conclusion, it is necessary for education programs to protect self-esteem of adolescents from the socialcultural distortion to appearance.

• Journal of Korean Orthopaedic Sports Medicine
• /
• v.7 no.1
• /
• pp.50-54
• /
• 2008

Purpose: In most cases, the main cause of chest or back pain during playing golf is rib fractures. This kind of rib fractures can be easily overlooked in plain radiographs. The purpose of this article is to clarify the value of the ultrasound in detecting rib fractures. Materials and Methods: We compared the findings of chest-X rays (anteroposterior, left or right lateral, both oblique view) with those of the ultrasound in 56 patients between the ages of 20th & 60th who were diagnosed rib fractures. Their chief complaints were chest or back pain which developed during playing golf. The results were analyzed statistically. Results: Among 56 cases of rib fractures, 34 cases were diagnosed with initial X-rays. 51 cases were diagnosed with ultrasound. The sensitivity of radiograph and ultrasound were 60.71% & 91.07%, respectively. Dignosis was ultrasound with statical significance whereas radiography did not(p=0.0004). Conclusion: It was concluded that ultrasound is a valuable tool in the diagnosis of the rib fractures which were undetected with X-rays during playing golf.