• Advances in environmental research
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• v.5 no.2
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• pp.79-94
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• 2016

In order to evaluate the contamination and health risk, levels of six hazardous elements i.e., Cr, Ni, Cu, As, Cd and Pb in soils of 12 different land-uses were measured. The average concentration of Cu, Cr, Ni, Pb, As and Cd in soils were 267, 239, 206, 195, 58 and 16 mg/kg, respectively. Levels of each metal exceeded the environmental action level for soils, which could pose significant risk to human. The metal concentrations were subsequently used to establish hazard indices (for adults and children) where the 5th and 95th percentile values were used to derive the hazard index through different exposure pathways (ingestion, dermal contact and inhalation). Considering the total exposure through each of the three pathways, the hazard index elucidates that there was a potency of non-cancer risk at most of the sites for both the adults and children. The findings of this study suggested that different land-use soils were severely contaminated with hazardous elements and attention is needed on the potential health risks to the exposed inhabitants.

• Journal of the Korean Geographical Society
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• v.47 no.2
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• pp.208-225
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• 2012

The spatial characteristics of changes in extreme temperature indices for 2070-2099 relative to 1971-2000 in the Republic of Korea were investigated using daily maximum (Tmax) and minimum (Tmin) temperature data from a regional climate model (HadGEM3-RA) based on the IPCC RCP4.5/8.5 at 12.5km grid spacing and observations. Six temperature-based indices were selected to consider the frequency and intensity of extreme temperature events. For validation during the reference period (1971-2000), the simulated Tmax and Tmin distributions reasonably reproduce annual and seasonal characteristics not only for the relative probability but also the variation range. In the future (2070-2099), the occurrence of summer days (SD) and tropical nights (TR) is projected to be more frequent in the entire region while the occurrence of ice days (ID) and frost days (FD) is likely to decrease. The increase of averaged Tmax above 95th percentile (TX95) and Tmin below 5th percentile (TN5) is also projected. These changes are more pronounced under RCP8.5 scenario than RCP4.5. The changes in extreme temperature indices except for FD show significant correlations with altitude, and the changes in ID, TR, and TN5 also show significant correlations with latitude. The mountainous regions are projected to be more influenced by an increase of low extreme temperature than low altitude while the southern coast is likely to be more influenced by an increase of tropical nights.

• The Journal of Pediatrics of Korean Medicine
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• v.26 no.4
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• pp.44-50
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• 2012

Objectives: We investigated weight gain effects of the Bofesungjangjeungbo-tang ($B\check{u}f\grave{e}ich\acute{e}ngzh\check{a}ngz\bar{e}ngb\check{u}$-tang) on thin Korean preschool children with frequent common cold or chronic rhinitis Methods Bofesungjangjeungbo-tang was empirically composed of 14 herbs for treating indigestion, and common cold or chronic rhinitis. We analyzed 60 preschool children who have visited Kim Kijoon Oriental Clinic BOM from Jan. 1, 2006 to Aug. 31, 2011 with three criteria: 1) 2~5yrs of age and BMI<50th percentile 2) children those who had taken the Bofesungjangjeungbo-tang for 1~3 month (s), 3) Availability of records on before/after treatment within 3 months. Weight gain of the children after treatment was evaluated by the changes of BMI percentile compared to pre-treatment. Results Bofesungjangjeungbo-tang significantly improved BMI percentile in all groups (1 month: $21.33{\pm}10.04$ vs $26.43{\pm}13.16$, p<0.001; 2 months: $21.90{\pm}10.28$ vs $29.03{\pm}15.06$, p<0.001; 3 months: $19.06{\pm}10.04$ vs $35.71{\pm}17.40$, p=0.001). Gender, age and pre-treatment BMI had no significant effects on the effectiveness of Bofesungjangjeungbo-tang. Conclusions: Bofesungjangjeungbo-tang positively affected weight gain in 2~5yrs Korean preschool children with BMI below 50 percentile within 1~3 month (s) of treatment. However, additional studies on functional dyspepsia or the change of energy intake are needed to understand the factors related to weight gains.

• The Korean Journal of Nuclear Medicine Technology
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• v.17 no.1
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• pp.76-79
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• 2013

Purpose: It is very important to establish the appropriate reference range in the laboratory for preventing mistakes like false positive or false negative. Because the reference range in the laboratory is standard of patient test results interpretation. Proinsulin is precursor hormone of insulin, and the importance is increasing for diagnosing diabetes or insulinoma. Proinsulin reagent used in our laboratory is produced in the USA, and the reference range provided by manufacturer was adapted to our reference range after the validation test. But, it is generally recommend for the every laboratory to establish the their own reference range. So, we decided to re-evaluate the reference range with our patients' test results. Materials and Methods: Among 737 patients who had been to health promotion center in our hospital between Dec. $8^{th}$ 2011 and Dec. $21^{st}$ 2011, 563 patients are chosen with exception of diabetics patients and patients showing abnormal test results in Fasting Glucose, HbA1c, Insulin, and C-peptide. The 563 test results (275 males and 288 females) were classified with three groups(entire, male, female), and analysis of normal distribution was performed with aid of SPSS(version 19.0). Because Each group didn't show normal distribution, the reference range was set from the lowest limit of 2.5% to the highest limit of 97.5% with Percentile method used in non-normal distribution. Results: When evaluation values are sorted in ascending order, the entire range is 4.5~52.0 pM and 5.3~51.9 pM for male and 4.5~52.0 pM for female. The calculated reference range with percentile method shows 6.7~26.5 pM for entire group, 6.8~26.5 pM for male and 6.7~26.5 pM for female, respectively. Conclusion: The reference range provided by reagent manufacturer is 6.4~9.4 pM and the one established in this study is 6.7~26.5 pM. This difference might be caused by racial characteristics between Western people and Koreans. So an ideal reference range can be gotten with normal population visiting to every hospital. Our hospital has been using the newly re-establishing reference range under consultation with the department of endocrinology since Aug. $1^{st}$ 2012.

• Research in Community and Public Health Nursing
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• v.21 no.4
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• pp.458-467
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• 2010

Purpose: This study was conducted in order to identify factors related to the health behavior in elementary school children at a late school age and to provide basic data to develop more concrete and practical applications for health promotion and disease prevention. Methods: The participants were 2,775 4th, 5th and 6th graders sampled from 10 elementary schools in Busan Metropolitan City and data were collected from 15th May to 30th June, 2010. The collected data were analyzed by mean, percentile, t-test, ANOVA, Pearson s correlation coefficient, and stepwise multiple regression using the SPSS/WIN 17.0 program. Results: The average percentiles for self-rated health, body satisfaction, stress, parent attachment, self-esteem, and health behavior were 82.8, 69.5, 40.9 79.3, 75.9 and 75.9, respectively. There was significant relationship among the levels of self-rated health, body satisfaction, stress, parent attachment, self-esteem, and health behavior. Body satisfaction was the most powerful factor to the health behavior of elementary school children at a late school age, and was followed by parent attachment, self-rated health, self-esteem, and grade in order. These variables explained 26.6% of the total variance in health behavior. Conclusion: Health promotion behavior programs including body satisfaction and self-esteem elevation programs should be applied to children at home and in school and community. To achieve this, institutional and economic support should be continued.

• Journal of the Korean Society of Radiology
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• v.15 no.5
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• pp.649-656
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• 2021

The purpose of this study was to evaluate the appropriateness of transverse cerebellar diameter and abdominal circumference (TCD/AC ratio) as variables to evaluate intrauterine growth restriction of the fetus. From April 2019 to March 2021, 784 pregnant women who underwent ultrasound as a regular checkup at I hospital were retrospectively analyzed using the transverse cerebellar diameter and abdominal circumference measurements. In simple regression analysis, transverse cerebellar diameter and abdominal circumference had an effect of 97.2% and 97.5% on gestational age (p<0.001). In addition, the percentile of the TCD/AC ratio for each gestational age group was calculated through frequency analysis, and the 95th percentile of intrauterine growth restriction prediction was 14.2. As a result, it is thought that the TCD/AC ratio can be used as a useful variable to evaluate the normal growth of the fetus and predict the IUGR.

• The Korean Journal of Food And Nutrition
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• v.8 no.3
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• pp.212-221
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• 1995

This survey of 180 6th-grade students was focused owl the differences of nutritional and anthropometric status according to calorie Intakes. The results were summarized as followed : 1) All nutrient intakes of boys were higher than those of girls, and both groups had lower calcium and iron intakes compared with RDA. But all the nutrient Intakes were showed significantly different among three groups divided by percentile of calorie intake(lower 25%, 25∼75% and upper 25%), therefore it suggested that subjects had a large individual variance. 2) Mean height, weight, TSK, and blood pressure of boys were 145.5cm, 40.6kg, 19.3mm, and 114.5/68.4mmHg respectively, and girls were 148.4cm, 38.9kg, 16.7mm, 112.3/67.0mmHg. The differences in anthropometric status according calorie and calcium intake were not found. This study showed protein intake had influence on height and weight of boys.

• Journal of Nutrition and Health
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• v.39 no.1
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• pp.44-49
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• 2006

The aim of this study was to evaluate the body composition difference and obesity prevalence in grade 5 to 8 by gender. A total of 1,333 students, 707 boys and 631 girls, were recruited from one elementary and one middle school in Seoul, Korea. Anthropometric measurements including height, weight, lean body mass, and body fat were assessed. Height and weight were increased by grade, but Body Mass Index (BMI) by grade showed no significant difference among boys. Lean body mass had growth spurt between 7 and 8 grade among boys compared to gradual increase among girls. Overweight and obesity prevalence were higher among elementary schoolers than middle schoolers. Overweight (BMI for age> $85^{th}$ percentile) prevalence was about $44\%$ among $5^{th}$ grade boys compared $29\%$ among same grade girls. These results provided that there were prominent difference regarding body growth and obesity prevalence in gender and grade. Further studies for children and adolescents should be considered their body composition change.

• Nuclear Engineering and Technology
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• v.42 no.6
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• pp.690-703
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• 2010

Sampling based uncertainty analysis was carried out to quantify uncertainty in predictions of best estimate code RELAP5/MOD3.2 for a thermal hydraulic test (10% hot leg break LOCA) performed in the Large Scale Test Facility (LSTF) as a part of an IAEA coordinated research project. The nodalisation of the test facility was qualified for both steady state and transient level by systematically applying the procedures led by uncertainty methodology based on accuracy extrapolation (UMAE); uncertainty analysis was carried out using the Latin hypercube sampling (LHS) method to evaluate uncertainty for ten input parameters. Sixteen output parameters were selected for uncertainty evaluation and uncertainty band between $5^{th}$ and $95^{th}$ percentile of the output parameters were evaluated. It was observed that the uncertainty band for the primary pressure during two phase blowdown is larger than that of the remaining period. Similarly, a larger uncertainty band is observed relating to accumulator injection flow during reflood phase. Importance analysis was also carried out and standard rank regression coefficients were computed to quantify the effect of each individual input parameter on output parameters. It was observed that the break discharge coefficient is the most important uncertain parameter relating to the prediction of all the primary side parameters and that the steam generator (SG) relief pressure setting is the most important parameter in predicting the SG secondary pressure.

• 대한예방의학회:학술대회논문집
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• 1994.02b
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• pp.158-163
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• 1994

Slightly elevated urinary albumin excretion rate (microalhuminuria) is a marker of early diabectic nephropathy, but it is unclear if the established definition of microalbuminuria ($20-200{\mu}g/min$) is correct for children and adolescents. We investigated th.: albumin excretion rate, albumin/creatinine ratio and urinary albumin concentration in 150 healthy schoolchildren and adolescents to (a) obtain a reterence value for albumin excretion rate, (b) relate albumin excretion to pubertal stages and (c) evaluate albumin/creatinine ratio and morning albumin concentration as screening methods for elevated albumin excretion rate. Albumin concentration was measured by immunoturbidimetry in timed overnight urine samples. The albumin excretion showed a skewed distribution (geometric mean $3.2{\mu}g/min$, 95 percentile ($15.1{\mu}g/min$). In girls. a peak in the albumin excretion rate was found at the pubertal stage 4 (Tanner) and in boys at stage 5. Albumin/creatinine ratio of 2.5 mg/mmol as a screening level for elevated albumin excretion ($15{\mu}g/min$) showed a high positive (0.88) and negative (0.99) predictive value.