• Structural Engineering and Mechanics
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• 제65권2호
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• pp.173-181
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• 2018

In this paper, finite element (FE) model updating based on multi-objective optimization with the surrogate model for a steel plate girder bridge is investigated. Conventionally, FE model updating for bridge structures uses single-objective optimization with finite element analysis (FEA). In the case of the conventional method, computational burden occurs considerably because a lot of iteration are performed during the updating process. This issue can be addressed by replacing FEA with the surrogate model. The other problem is that the updating result from single-objective optimization depends on the condition of the weighting factors. Previous studies have used the trial-and-error strategy, genetic algorithm, or user's preference to obtain the most preferred model; but it needs considerable computation cost. In this study, the FE model updating method consisting of the surrogate model and multi-objective optimization, which can construct the Pareto-optimal front through a single run without considering the weighting factors, is proposed to overcome the limitations of the single-objective optimization. To verify the proposed method, the results of the proposed method are compared with those of the single-objective optimization. The comparison shows that the updated model from the multi-objective optimization is superior to the result of single-objective optimization in calculation time as well as the relative errors between the updated model and measurement.

• Journal of Nutrition and Health
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• 제30권8호
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• pp.995-1008
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• 1997

This study was performed to investigate the change in taste perception during aging and its effects on dietary intake in Korean elderly. The subjects were female aged 65 through 90 in the Anyang area, and college women were included as a comparison group . Dietary intake of the elderly(n=155) and young subjects (n=38) was measured by a 3 day diet record. The taste threshold and 'just right' concentrations(JRC) for sweet and salty tastes were assessed by sensory evaluation . Sucrose solution (0.0.,0.4,0.6,0.8,1.0, 1.2%) and salt solution(0, 0.02, 0.03,0.06,0.09,0.12,0.15%) were used to establish thresholds. for JRC assessment, four suprathreshold sucrose concentrations of 5, 8, 11 and 14% in orange-pineapple flavored juice and salt concentrations of 0.20, 0.34, 0.50and 0.75% in beef stock were prepared. Mean intakes of energy, protein , vitamin A, thiamin , riboflavin, niacin ,calcium and iron of the elderly were below the Korean Recommended Dietary allowances. The elderly showed higher taste thresholds than young subjects of both sweet and salty tastes consumed less calories. Needs to bespecified. The older subjects having high threshold or JRCs for sweet and salty tastes consumed fewer calories from protein and fat. Pearson correlation coefficients was between JRC for sweet and salty tastes 0.54(p<0.01). The correlation coefficients between tastes threshold and nutrient intakes were very low for both age groups. Unlike the college women, in the elderly the JRC of sweet taste of the orange-pineapple juice were negatively correlated with intakes of energy, protein, fats, thiamin , riboflavin , niacin ,vitamin C , iron and consumption of meat and egg food groups (p<0.01). In summation age-related alterations in sweet and salty taste perception were observed in the elderly and dietary intakes of the elderly see to be influenced by these taste perception changes.

• 한국임상보건과학회지
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• 제5권4호
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• pp.1009-1014
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• 2017

Purpose. This study compared the awareness of the evidence-based practice(EBP) in 100 physical and occupational therapists. Methods. A questionnaire on awareness was conducted to examine the attitude toward EBP, the educational experience of EBP, and the performance ability of EBP. A questionnaire consisted of items on the general characteristics, the attitude toward EBP, the educational experience of EBP, and the performance ability of EBP of the subjects. Data analysis was made by IBM SPSS Statistics Ver. 20. The EBP awareness was examined by the independent t-test. Results. For the attitude toward EBP, there was a statistically significant difference in the item of 'Therapists should judge whether they apply study results to individual patient. For the educational experience of EBP, there was no statistically significant difference in all items. For the performance ability of EBP, there was a statistically significant difference in the item about the ability to understand patient's desire for treatment and treatment preference and the item about the ability to determine appropriate treatment process in cooperation with patients. Conclusions. Both two groups showed very low results in the attitude toward EBP, the educational experience of EBP, and the performance ability of EBP. Therefore, it is necessary to enhance EBP education in undergraduate programs and the clinical field.

• 한국산학기술학회논문지
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• 제14권11호
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• pp.5771-5777
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• 2013

최근 만성질환의 증대로 질병의 지속적인 관리에 대한 필요성이 대두되고 있으나 개인 맞춤형 식품섭취와 관련한 분석 연구는 미비하다. 본 연구에서 제시한 당뇨병 발생 위험도 분석 모델은 기존 상품 선호도 연구를 통해 검증된 유사도평가 방법인 피어슨 상관계수 산출을 이용하여 식품 선호도를 산출하고, 유병율 분석 연구 등에 활용된 로지스틱 회귀분석 방법을 이용하여 당뇨병발생 위험도를 제시하였다. 모델의 유의성 평가를 위해 당뇨 진단을 받은 환자 52명(남자: 22명, 여자: 30, 평균연령: 57(${\pm}13.2$)세)과 비교군과 비슷한 연령을 조건으로 무작위 추출된 52명(남자: 17명, 여자: 35, 평균연령: 58(${\pm}9.4$)세)의 t-검정을 통해 0.05 수준에서 유의함을 검증하였다. 이를 통해 식품섭취빈도에 따른 당뇨병 발생 위험도에 차이가 있음(p=0.046)을 확인할 수 있었다. 이 모델을 기반으로 분석된 정보는 스마트폰이나 웹을 이용한 개인 건강관리 시스템에 적용을 통해 새로운 개인 맞춤형 건강관리 방법으로 제시될 수 있다.

• 대한지역사회영양학회지
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• 제18권6호
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• pp.555-564
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• 2013

The purpose of this study was to compare and analyze the assessment of salty taste and high-salt dietary behaviors of Korean university students and their Chinese counterparts. The researchers developed a taste assessment computer program focusing on preference for salty taste, and it was applied to 300 university students, including 100 Korean students, and 100 Chinese students in Daegu of South Korea, and 100 Chinese students in Shenyang of China (144 males and 156 females). The results of the taste assessment of Chinese and Korean university students are as follows. Among males, Koreans (36.0%), Chinese students in Korea (36.2%), and Chinese (40.4%) scored highest in the "a bit salty" followed by "normal." Among females, Koreans (36.0%), Chinese students in Korea (49.1%), and Chinese (28.3%) scored highest in the "normal". In terms of salt concentration in solution, among the male subjects, most Koreans favored the salt concentration of 0.31%, which is considered to be a "normal" concentration; most Chinese students in Korea favored 0.63%, which is considered to be "a bit salty", and most Chinese favored the concentration of 1.25%, which is considered to be "salty". As for the female subjects, Koreans, Chinese students studying abroad, and Chinese favored 0.31%, the "normal" level of concentration. Korean students scored higher than Chinese students in Korea and Chinese students both in males and females (p < 0.001, p < 0.01), in terms of high-salt dietary behaviors favored salty taste. This study suggests that Chinese university students need nutrition education in terms of modifying eating behaviors to reduce dietary salt intake.

• 한국수산과학회지
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• 제48권1호
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• pp.44-50
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• 2015

The basic and main nutritive ingredients of two temperature (Anguilla japonica and A. rostrata) and two tropical (A. bicolor pacifica and A. marmorata) fresh water eel species that are farmed domestically were evaluated. With exception of A. rostrata, eels cultured at the same farm were used for analysis. The contents of crude protein were in the order A. marmorata (17.7%)>A. rostrata (17.5%)>A. bicolor pacifica (17.4%)>A. japonica (15.8%) and the contents of crude lipids were A. japonica (21.5%)>A. rostrata (15.4%)>A. bicolor pacifica (10.5%)>A. marmorata (8.9%). These values differed significantly even among the three species of eel farmed under identical culture conditions. In comparison, all four species of eel showed similar pattern in overall amino acid composition, although slight differences in the compositions of some amino acids were observed. The fatty acid compositions of muscle tissues were notably different among four species of eel, especially between the tropical and temperature eels. In a taste-test of the meat of the four eel species, which considered taste, flavor and texture, the overall preference was in the order A. japonica, A. marmorata, A. bicolor pacifica and A. rostrata.

• 대한족부족관절학회지
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• 제15권2호
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• pp.72-78
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• 2011

Purpose: The purpose of this study is to compare the clinical outcome of excision versus osteosynthesis of type II accessory navicular performed by a single surgeon. Materials and Methods: Cases of 14 feet treated with excision and 13 feet by osteosynthesis for type II accessory navicular of 25 patients from 2002 to 2009 were included in this study. Radiological measurements and American Orthopaedic Foot and Ankle Society (AOFAS) midfoot scale was evaluated. Results: AOFAS midfoot scale of both excision and osteosynthesis groups at last follow-up showed improvement from pre-operation. However, there was no statistical difference in AOFAS midfoot scale and subjective satisfaction between the two groups at last follow-up. In detail of AOFAS midfoot scale, pain and footwear requirements showed statistically favorable results for the excision group, while activity limitation and support showed statistically favorable results for the osteosynthesis group. Subjective recovery time returning to daily activities and starting rehabilitation exercise were 14.6 weeks in the excision group and 13.7 weeks in the osteosynthesis group (p=0.025, Mann-Whitney). Suture anchor loosening was observed in one case in the excision group and non-union in two cases in the osteosynthesis group. Conclusion: Both excision and osteosynthesis are favorable surgical methods, but each method has advantages and possible complications such as suture anchor loosening or non-union. Surgeon's preference, patient's chief complaint, specific needs of patient after the operation and consideration of the size of accessory navicular can be a criteria to consider when selecting a surgical method.

• Molecules and Cells
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• 제40권10호
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• pp.714-730
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• 2017

Pre-mRNA splicing further increases protein diversity acquired through evolution. The underlying driving forces for this phenomenon are unknown, especially in terms of gene expression. A rice alternatively spliced transcript detection microarray (ASDM) and RNA sequencing (RNA-Seq) were applied to differentiate the transcriptome of 4 representative organs of Oryza sativa L. cv. Ilmi: leaves, roots, 1-cm-stage panicles and young seeds at 21 days after pollination. Comparison of data obtained by microarray and RNA-Seq showed a bell-shaped distribution and a co-lineation for highly expressed genes. Transcripts were classified according to the degree of organ enrichment using a coefficient value (CV, the ratio of the standard deviation to the mean values): highly variable (CVI), variable (CVII), and constitutive (CVIII) groups. A higher index of the portion of loci with alternatively spliced transcripts in a group (IAST) value was observed for the constitutive group. Genes of the highly variable group showed the characteristics of the examined organs, and alternatively spliced transcripts tended to exhibit the same organ specificity or less organ preferences, with avoidance of 'organ distinctness'. In addition, within a locus, a tendency of higher expression was found for transcripts with a longer coding sequence (CDS), and a spliced intron was the most commonly found type of alternative splicing for an extended CDS. Thus, pre-mRNA splicing might have evolved to retain maximum functionality in terms of organ preference and multiplicity.

• 한국식품조리과학회지
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• 제28권6호
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• pp.847-856
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• 2012

Rhinitis and sinusitis are among the most common medical conditions in Korea, as well as Western societies. Environmental factors may influence both rhinitis and sinusitis; however, the role of dietary factors in rhinitis and sinusitis is not clear. The present study aims to compare the dietary habit, food consumption frequency, and food preference of elementary school students with or without rhinitis and sinusitis. The demand of their parents for an education program for the dietary prevention against rhinitis and sinusitis was also examined. The survey was conducted with a total of 200 subjects recruited from two elementary schools located in Gyeonggi area of Korea. The subjects consisted of 101 students with rhinitis and/or sinusitis (RS group) and 99 without rhinitis and sinusitis (control group). The students of the RS group were more likely to have habits of eating-out and street food use, to consume bean, peanut, walnut, almond, yogurt, egg, snack, and French fries frequently, and to prefer the types of foods prepared by stir-frying and deep-frying than the control group. The parents who recognized 'school nutrition teachers or food/nutrition-majored specialists' as the most appropriate educator for the dietary education program in the RS group (48.5% of their parents) were less than those in the control group (67.7% of their parents). The present study suggest that students with rhinitis and/or sinusitis may be different from those without the disease(s) in their dietary habit, frequently consumed foods, and preferred type of foods. More epidemiological, intervention, and laboratory studies are needed in order to elucidate the role of dietary factors in the development and prevention of rhinitis and sinusitis, which will have a significant implication to public health.

• 한국산학기술학회논문지
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• 제14권6호
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• pp.2812-2818
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• 2013

한의학과 대체의학은 그 뛰어난 진단 기술 및 처방과 치료 효과에도 불구하고 선호도에 있어 서양의학에 많이 떨어지고 있는 것이 현 실정이다. 마찬가지로 한의학과 밀접히 연계되어 있는 대체의학도 그 효과에 대한 입증이 과학적으로 규명이 되지 못하고 있는 것이 가장 큰 단점으로 여겨진다. 본 논문에서는 대체의학에서 흔히 사용하는 이침 요법이 실제 인체 장기 기능 강화에 도움이 되는 행위인지를 생체신호를 분석하는 방법 중 얼굴의 피부색 변화를 살펴보는 망진 이론을 적용하여 이를 규명하는 방법을 제안하고자 한다. 이를 위해 폐 이혈 반사점을 자극한 후의 우측뺨 색상을 측정하여 자극 전과의 비교, 분석 실험을 수행하였다. 또한 검증과 규명을 위해 우선적으로 인체가 폐에 미치는 영향의 분석에 필요한 영상 분석 요소를 파악하였다. 실험 결과, 폐 이혈 반사점 자극에 의해 우측뺨의 a값과 b값이 증가하는 결과가 도출되었다.