유한요소법을 이용한 기둥형 로드셀의 비선형성 평가

배준우,황재근,박경흠,양희준,이춘열 嶺南大學校 工業技術硏究所 2004 工業技術硏究所論文集 Vol.32 No.1

Recently, force measurement systems are commonly used in many industrial fields and the precision of the measurement system is getting more important as the industry needs more precise tools and instruments to make high quality products. However, a high precision force measurement system is hard to make unless we know precisely the causes, quality and quantity of measurement errors in advance. In this work, many possible mechanical causes of measurement errors are reviewed including ratio of length to diameter of sensing part, radius of contact area, radius of bearing part, ratio of material properties and change of boundary conditions. Also, the measurement errors are analyzed by nonlinear finite element method and the nonlinear behavior of the errors are investigated. The results can be used to design force measurement systems and expected to be very useful especially for compact type load cells.

단기간 크레아틴 구강투여가 최대근력 및 신체조성에 미치는 영향

가경환,배두열,신민철 한국스포츠리서치 2001 한국 스포츠 리서치 Vol.12 No.4

The purpose of this study was to identify the effect of shout-term oral creatine administration of maximum strength and body composition. For this purpose, specialists in yudo and undergraduates in 'Y' University were selected as the subjects of this study and 5 persons were each randomly assigned to the group of training plus creatine, to the group of only training and to the group of only creatine administration. They were asked to ingest 20g of creatine with ionized beverage and water after breakfast, lunch and supper and before bedtime(5g x 4 times) everyday for 6 days. They was asked to conduct weight training three time a week, and sports events included bench press, leg extension, leg curl, arm curl, shoulder press and the like. The repeated them at the workload of 70∼80% of I-RM and conducted each motion in three sets. To measure muscular strength as the variable to be tested, an attempt was made to measure bench press I-RM, leg extension I-RM, leg curl I-RM, arm cur I-RM, shoulder press I-RM before and after training. An attempt was made to determine such factors related to body compostion as weight, body fat amount and body fat ratio using the Inbody 3.0 Body Compostion Analyzer. Creatine analysis was conduct through creatine in urine by using the biochemical analyzer(Model-Ha TACHI 747/737, HITACHI CO. Japen). Repeated two-way ANOVA was used to analyze data. Hypotheses were tested at the significance level of d=.05. As a result, the following results were obtained: 1. It was found that both of the groups showed a significant defference in bench press, leg extension, leg curl, arm curl, shoulder press, incline bench press, should machine, sit-up I-RMs before and after participation in short-run weight training(p<.05). But there was no difference in them between groups. And it was found that there was no interaction before and after creatine administration and one-week weight training. (p>.05). 2. It was found that there was no signigicant variation in body composition(body fat amount changes and body fat ratio changes) before and after shout-run weight training(p>.05). And it was found that there was no interaction before and after creatine administration and one-week weight training(p>.05). 3. It was found that there was no significant variation in the urinalysis before and after short-run weight training(p<.05). And it was found that there was no interaction before and after creative administration and one-week weight training (p>.05).

스프린터 및 장거리 런너들의 단기 및 장기 기능성염 투여에 대한 산화 및 항산화제의 특성

강경빈,배성완,박동철,김학렬 한국스포츠리서치 2004 한국 스포츠 리서치 Vol.15 No.6

The aim of this study was examine a effects of acute and chronic Functional salt supplement in serum malonedialdehyde concentration as oxidants, and superoxide dismutase and catalase activity as anti-oxidants during maximal exercise In the acute functional salt supplement, Serum MDA concentration of ETG presented significantly decreased 1evels(p<.05) in immediately after exercise compared to rest, but STG was shown a greatly increased levels(p<.05), However, SCG was not shown a difference. In the difference of three group. It was shown a significant difference between ETG vs. STG and ETG vs. SCG(p<.01, respectively). In the chronic functional salt supplement, serum MDA concentration of ETG was shown a significantly low levels(p<.05) immediately after exercise post 12week supplement compared before supplement, wherease, STG presented increased levels in immediately after exercise compared to rest state before supplement, but it was not difference in post 12week supplement, As results, it was not difference in rest state between before and after, but significantly low levels(p<.01) in immediately after exercise post 12week supplement, serum MDA of SCG presented increased levels(p<.05) in immediately after exercise compared to rest before supplement, but it was not significant difference post 12week. Serum SOD activity of three group was riot shown a significant difference in immediately after exercise compared to rest, before and after 12week supplement, Also, it was not difference between before and after supplement. However, serum SOD activity was proved a significantly high levels in ETG, compared to SCG in immediately after exercise before and after supplement. Serum CAT activity of ETG presented not difference in rest and immediately after exercise before and after supplement, but it was shown a significantly high levels(p<.05) in immediately after exercise after supplement compared to before supplement, However STG was not difference, serum CAT activity of SCG presented significantly high levels(p<.05) in immediately after exercise after 12weeks.

BRS 생체정보 분석방법(分析方法)의 정확도(正確度) 확인 연구

유상구,임무열,오상문,유경배,신연호,박병운,이완희 한국정신과학학회 1998 韓國精神科學學會誌 Vol.2 No.2

BRS는 인간의 잠재능력을 적극적으로 계발 · 활용하여 임의의 시료에 대한 미지 (未知)의 생체정보 (Bio-Information)를 편리하게 분석할 수 있는 효과적이고 경제적인 분석장비이다. 그러나 BRS와 관련된 분석방법 자체의 정확도에 대한 연구는 충분하게 이루어지지 않고 있다. 그래서 BRS 분석방법의 정확도를 과학적으로 확인해보기 위해서 본 연구를 진행했다 실험결과, BRS에 의한 생체정보 분석방법 의 정확도는 측정자의 숙련정도에 따라 다르지만 고급 측정자의 경우에는 95% 이상의 높은 확률로 표준시료의 생체정보를 정확하게 분석할 수 있으며, 측정자의 분석능력이 떨어지는 경우에는 여러 명의 측 정자를 대상으로 비교검토(Cross-Check) 방식으로 실험을 보완하면 90% 이상의 정확도를 확보할 수 있었다. BRS is a sort of analysis-instrument which help to estimate some Bio-Information for a sample conveniently and effectively But, for lack of the study to verify the confidence-degree of the Bio-Information analysis method related to BRS, the availability of the method is not known clearly yet, It was the reason that made authors perform this study And It was possible to arrive at the following two conclusions I though the confidence-degree of the Bio-Information analysis method ny BRS was different according to the degree of the expertness of a person using the instrument in the case of the very skillful expert, the confidence-degree for the standard sample used in this study was reached to 95% up 2 In the general case, to improve of the confidence-degree of the Bio-Information analysis method by BRS, the cross-check method by the several measuring person can be introduced.

노인에서 신체질환과 불면증 간의 전향적 연관성

김재민,김성완,양수진,김선영,배경열,조준영,윤탁,신일선,윤진상 大韓神經精神醫學會 2008 신경정신의학 Vol.47 No.5

Objectives : This study aimed to investigate the associations between physical disorders and prevalent/incident insomnia m a community dwelling older population. Methods : 1,204 people aged 65 or over evaluated at baseline. Insomnia was defined as difficulty in initiation or maintenance of sleep on at least three nights per week over the last month. Reported physical disorders covering 11 common and generally chronic health problems were ascertained. Covariates included were age, gender, education, housing, Past occupation, current employment, and depression. Of 879 without insomnia at baseline, 651 (74%) were followed 2 years later, and incident insomnia was evaluated. Results : Prevalent insomnia was significantly associated with 10 of 11 physical disorders. Incident insomnia was associated with 2 physical disorders : eyesight problems and hearing difficulty. Both prevalent and incident insomnia were significantly associated with increased number of physical disorders. Conclusion : Certain physical disorders were comorbid and precipitating factors of insomnia in elders.

노인의 인지기능에 따른 부양자의 부양부담

배경열(Kyung-Yeol Bae),신일선(Il-Seon Shin),김성완(Sung-Wan Kim),김재민(Jae-Min Kim),양수진(Su-Jin Yang),문지웅(Ji-Ung Mun),신희영(Hee-Young Shin),윤진상(Jin-Sang Yoon) 대한생물치료정신의학회 2006 생물치료정신의학 Vol.12 No.1

목적 : 본 연구의 목적은 노인의 인지기능에 따른 부양자의 부양부담 수준을 조사하고, 부양부담과 연관성이 있는 인지를 비교하는데 있다. 방법 : 2001년 7월부터 동년 12월까지 484명의 65세 이상 노인과 그들의 부양자를 대상으로 조사하였다. 부양부담은 한국판 Zarit Burden Interview로 조사하였다. 노인의 사회인구학적 특징 및 임상적 특징(인지 기능, 일상생활 수행, 우울 증상, 알코올 중독, 신체 질환), 그리고 부양자의 사회인구학적 특징 및 부양 환경(대리부양자 유무, 가족의 수, 방의 수, 월 수입, 사회적 지지)에 관한 자료를 수집하였다. 전체 대상자는 노인에 대한 인지기능평가 및 치매진단 결과에 따라 3개 군으로 분류되었다 : 정상군 319명, 인지장애는 있으나 치매는 아닌 군(Cognitive Impairment No Dementia, CIND) 104명, 치매군 61명. 결과 : 부양부담은 치매군 부양자가 정상군 및 CIND군 부양자에 비해 유의하게 높았다. 부양부담과 독립적 연관성 있는 인자는 정상군에서는 우울 증상과 알코올 중독, CIND군에서는 알코올 중독, 그리고 치매군에서는 노인의 도시거주, 인지 장애, 우울 증상, 그리고 부양자가 교육수준이 높고, 자식인 경우 및 부양자에 대한 사회적 지원이 낮은 경우였다. 결론 : 부양자의 부양부담을 줄이기 위해서는 노인의 인지 기능에 따라 다른 접근을 해야 한다 치매노인에서는 노인의 인지 기능과 우울 증상을 개선시키기 위한 치료와 함께, 부양자에 대한 사회적 지지를 제공하는 것이 필요하다. 정상 및 CIND 노인에서는 알코올 중독에 대한 관리가 필수적이며, 또한 정상노인에서 우울증을 치료하는 것도 중요하다. Objectives : This study aimed to investigate the degree of care burden of caregivers and to compare the factors associated with the care burden according to the level of cognitive function of elderly persons. Methods : The study sample consisted of 484 elderly peoples and their caregivers. Care burden was measured by the Korean version of Zarit's Burden Interview. According to the level of cognitive status and diagnosis of dementia for the elderly persons, the total participants were classified into three groups: normal group(N=319), cognitive impairment no dementia(CIND, N=104), and dementia group(N=61). Results : The degree of care burden was significantly higher in caregivers of dementia group than the others. Higher care burden was independently associated with severe depressive symptom and alcoholism in normal group, with alcoholism in CIND group, and with elderly persons' factors(urban living, cognitive impairment, and severe depressive symptom) and caregivers' factors(higher education, being a child, and lower social support) in dementia group. Conclusion : To mitigate the care burden, different approaches according to the level of cognitive function of elderly persons could be recommended.

Zuckerkandl 기관에 발생한 비기능성 부신경절종

배희열(Hee Yeol Bae),정경석(Kyung Suk Chung),이기주(Ki Chu Lee),안혜경(Hae Kyung Ahn) 대한외과학회 1991 Annals of Surgical Treatment and Research Vol.41 No.3

Theoretical Design for the Production of Quinoa (Chenopodium quinoa Willd.) in a Closed Plant Factory

Bae, Jong Hyang,Austin, Jirapa,Jeon, Yoon-A,Cha, Mi-Kyung,Cho, Young-Yeol Korean Society of Horticultural Science 2016 원예과학기술지 Vol.34 No.6

Quinoa (Chenopodium quinoa Willd.) is a grain crop with high nutritional value. The leaves and sprouts of quinoa can also be consumed either raw or cooked, providing considerably nutritional value as well as high antioxidant and anticancer activities. This study was carried out to obtain basic data to assist in the practical design of a plant factory with artificial lighting for the cultivation of quinoa as a leafy vegetable. We estimated the energy content of the quinoa and the electrical energy required to produce this crop. The yield was 1,000 plants per day, with a planting density and light intensity of $0.015m^2$ ($15{\times}10cm$) and $200{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, respectively. The total number of plants, cultivation area, and electricity consumption were estimated to be 25,000, $375m^2$, and $93,750{\mu}mol{\cdot}s^{-1}$, respectively. White fluorescent lamps were used at a power of 20.4 kW from 1,857 fluorescent lamps (FL, 55 W), and the cost for electricity was approximately 1,820 dollars (exchange rate of $1 = 1,200 won) per month. For a daily harvest of 1,000 plants per day in a closed plant factory, the estimated light installation cost, total installation cost, and total production cost would be 15,473, 46,421, and 55,704 dollars, respectively. The calculated production cost per plant, including labor costs, would be 27 cents for the 25-day cultivation period, with a marketable ratio of 80%. Considering the annual total expenses, income, and depreciation costs, the selling price per plant was estimated to be approximately 56 cents.

Clinical manifestation of Campylobacter enteritis in children

Bae, Joon Yeol,Lee, Dong Hyuk,Ko, Kyung Ok,Lim, Jae Woo,Cheon, Eun Jeong,Song, Young Hwa,Yoon, Jung Min The Korean Pediatric Society 2018 Clinical and Experimental Pediatrics (CEP) Vol.61 No.3

Purpose: Timely antibiotic therapy in selected cases of diarrhea associated with bacterial infections can reduce the duration and severity of illness and prevent complications. The availability of a predictive index before identification of causative bacteria would aid in the choice of a therapeutic agent. Methods: The study included patients admitted to the pediatrics unit at Konyang University Hospital for acute inflammatory diarrhea from August 1, 2015 to July 31, 2016 who underwent multiplex polymerase chain reaction testing. Of 248 patients, 83 had positive results. The clinical symptoms and blood test results were examined in 61 patients with Campylobacter spp. (25 patients), Salmonella spp. (18 patients), and Clostridium perfringens (18 patients) infections. The mean age of the 61 patients (male:femal=31:30) was $84.0{\pm}54.8months$, and the mean hospital stay was $4.6{\pm}1.7days$. Results: There were no statistical differences in sex, age, clinical symptoms, or signs. Patients with Campylobacter infection were significantly older (P=0.00). C-reactive protein (CRP) levels in patients with Campylobacter infection were higher than those in the other 2 groups, at $9.6{\pm}6.1mg/dL$. The results of receiver-operating characteristic curve analysis showed that the cutoff age was ${\geq}103.5months$ (sensitivity, 72%; specificity, 86%) and the CRP cutoff level was ${\geq}4.55mg/dL$ (sensitivity, 80%; specificity, 69%). Conclusion: Age (${\geq}103.5months$) and higher CRP level (${\geq}4.55mg/dL$) were good predictors of Campylobacter enterocolitis. If neither criterion was met, Campylobacter enterocolitis was unlikely (negative predictive value 97.2%). When both criteria were met, Campylobacter enterocolitis was highly likely.

The effect of coffee, tea, and caffeine consumption on serum uric acid and the risk of hyperuricemia in Korean Multi-Rural Communities Cohort.

Bae, Jisuk,Park, Pil Sook,Chun, Byung-Yeol,Choi, Bo Youl,Kim, Mi Kyung,Shin, Min-Ho,Lee, Young-Hoon,Shin, Dong Hoon,Kim, Seong-Kyu Springer International 2015 Rheumatology International Vol.35 No.2

<P>Caffeine, a commonly consumed food constituent, is known to exert beneficial physiological effects in humans. There is a lack of comprehensive population data for the effects of caffeine intake on urate metabolism. Therefore, the aim of this study was to determine whether coffee, tea, and caffeine intake influences serum uric acid and the risk of hyperuricemia in the Korean Multi-Rural Communities Cohort. We enrolled 9,400 participants in this study. An assessment of various dietary intake amounts of substances such as coffee and tea was performed using a food frequency questionnaire. The content of caffeine was calculated from coffee (74 mg/cup) and tea (15 mg/cup) intake information from the past year. Multivariate logistic regression models, multiple linear regression models, and analysis of covariance were applied to identify any association of dietary intake with serum uric acid levels or the risk of hyperuricemia. No trends for coffee, tea, or caffeine intake were found according to each quintile with serum uric acid in males, although there were weak, marginally significant trends between the content of coffee and caffeine intake and serum uric acid level in females (p = 0.07 for both). Tea intake in males and caffeine intake in females were significantly different between non-hyperuricemia and hyperuricemia (p = 0.04 and p = 0.04, respectively). In addition, a significant association of serum uric acid level with tea intake in males (관 = 0.0006, p = 0.02) and with tea intake and caffeine intake in females (관 = 0.0003, p = 0.04 and 관 = 0.0006, p = 0.02, respectively) was observed. There was no effect of coffee, tea, or caffeine intake on the risk of hyperuricemia in either males or females. This study suggests that caffeine consumption might have an effect on serum uric acid in females. However, coffee, tea, and caffeine intake amounts were not associated with the risk of hyperuricemia.</P>