• Journal of Food Hygiene and Safety
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• v.16 no.3
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• pp.178-187
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• 2001

A study has been performed to estimate the average and high (90th percentile of consumers-only) daily intakes of sorbates by age-sex groups (> 3 years old) in Korea. The estimation of daily intakes was based on individual-based dietary intake data in ‘National Health and Nutrition Survey in 1998’and the contents of sorbates from samples. The estimated daily intakes (EDI) of sorbates for average consumers ranged from 0.09 mg/kg/bw/day to 0.51 mg/kg bw/day corresponding to 0.4-2.1% of acceptable daily intake (ADI). For high consumers, the range of EDI of sorbates was 3.42-14.65 mg/kg bw/day corresponding to 13.7-58.6% of ADI. Foods that contributed most to the daily intakes of sorbates for all age-sex groups were processed fish products, processed meat products, and salted floods. There was an inverse relationship between age and the consumption of sorbates for average and high consumers, whereas no marked pattern was emerged by sex categories. The intake levels of sorbates even among high consumers were below the ADI in Korea.

• The KIPS Transactions:PartD
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• v.11D no.1
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• pp.219-228
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• 2004

Confidence interval estimators for proportions using normal approximation have been commonly used for coverage analysis of simulation output even though alternative approximate estimators of confidence intervals for proportions were proposed. This is -because the normal approximation was easier to use in practice than the other approximate estimators. Computing technology has no problem with dealing these alternative estimators. Recently, one of the approximation methods for coverage analysis which is based on arcsin transformation has been used for estimating proportion and for controlling the required precision in [12]. In this paper, we compare three approximate interval estimators, based on a normal distribution approximation, an arcsin transformation and an F-distribution approximation, of a single proportion. Three estimators were applied to sequential coverage analysis of steady-state means, in simulations of the M/M/1/$\infty$ and W/D/l/$\infty$ queueing systems on a single processor and multiple processors.

• Clinical and Experimental Pediatrics
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• v.46 no.4
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• pp.385-388
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• 2003

Pulmonary sequestration is a rare congenital mass of nonfunctional pulmonary tissue that lacks a normal-connection with the bronchial tree or the pulmonary arteries. It is clinically asymptomatic but when it is complicated with recurrent infection, it needs to be treated. Conventionally, surgical removal was recommended, but these days we are trying new and less invasive techniques, such as arterial embolization. There were several reports about successful cases of pulmonary sequestration treated by embolization, but mostly all of them were done to newborns or infants. We report a case of a 15-year-old boy with an asymptomatic pulmonary sequestration on whom was performed coil embolization, and in the follow-up computed tomography(CT), the size of the lesion was decreased. He did not suffer severe respiratory symptoms.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.30 no.1
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• pp.31-37
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• 2017

In this paper, computation results of reducible modeling, stress recovery and energy release rate were compared with the results of VABS, Virtual Crack Closure Technique. The result of stress recovery analysis for 1-D model including the stiffness matrix is compared with stress results of three-dimensional 3-D FEM. Energy release rate of composite beam with longitudinal cracks is calculated and compare verifications of numerical analysis results of 3-D FEM and VABS. The procedure of calculating energy release rate through dimensional reduction and stress recovery is intended to be efficient and be utilized in the life-cycle of high-altitude uav's wing, wind blades and tilt rotor blade.

• Korean Journal of Child Studies
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• v.22 no.2
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• pp.255-275
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• 2001

The purpose of this study was to construct a rating scale of infant and toddler development for the use of teachers in their observations of children during daily activities. The scale consists of 201 items measuring motor, self-help, socio-communicative, socio-emotional, and cognitive development. Quality, reliability and validity were examined with the use of a nation-wide sample of 1,245 children from classes of 1- and 2-year-olds. Tests on validity and reliability were high in terms of content validity evaluated by early childhood professionals, concurrent validity with the Bayley Scale, internal consistency among raters, and test-retest reliability. Factor analysis showed that the developmental areas of infants and toddlers are not clearly differentiated but are interrelated with each other. The scale was standardized by providing nation-wide norms with raw scores, percentiles, and standardized scores.

• Journal of Radiation Protection and Research
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• v.36 no.2
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• pp.64-70
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• 2011

The intercomparison exercise on internal dose assessment has been carried out for the purpose of the evaluation for harmonization of internal dosimetry between the nuclear-related institutes in Korea. The exercises of 9 items on internal dose assessment have been developed for the unknown internal dosimetric parameters such as the intake pathway, absorption type, AMAD, and intake time of a radionuclide. Solutions to these exercises were reported by 7 participants from 5 institutes. The range of the ratio between the individual values and the geometric mean value of the evaluated doses for the exercises was $5.75{\times}10^{-4}$ ~ 9.81. But without the extreme partial solution, the range of the ratio was 0.216 ~ 3.12.

• The Korean Journal of Food And Nutrition
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• v.26 no.3
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• pp.398-403
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• 2013

To manufacture the fermented tea with hygienic quality, green tea was fermented using Bacillus subtilis, Saccharomyces cerevisiae and Lactobacillus bulgaricus and mineral composition, total amino acid content and antioxidative activity changes were evaluated during the fermentation period. Minerals detected in the fermented tea, the Ca, Fe, Zn, Mg and Mn minerals were detected. Ca and Mg are relatively large compared to other mineral content. Total amino acid content of the control was 3.57%, but total amino acid of fermented teas were higher (3.68~3.85%) during fermentation 20 days. Metal chelating activity of control was 55.11%, Metal chelating activity of the fermented tea using B. subtilis was the highest. In reducing power, O.D. value of the control was 2.27, three kinds of fermented tea were lower than that of control. The fermented teas increased lipid peroxidation inhibition compared to the blank test.

• Horticultural Science & Technology
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• v.17 no.2
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• pp.136-137
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• 1999

This experiment was conducted to improve germination rate and growth of Lilium formolongi 'Neosan No. 2' seeds by priming. Seeds were immersed in the solutions of 200 mM $Ca(NO_3)_2$, 200 mM $KNO_3$ for 3 days and 100 mg/L $GA_3$ for 1 day at $17{\pm}1^{\circ}C$. For chilling treatment, seeds were kept in the low temperature chamber of $2{\pm}1^{\circ}C$ for 30 days. Germination percentage of seeds treated with $Ca(NO_3)_2$ or $KNO_3$ was higher than that of seeds with other treatments and control seeds to 10 days after seeding, but final germination percentage was not significantly different among all treatments including control. Early growth of seedlings treated with $Ca(NO_3)_2$ and $KNO_3$ were better than that of seedling with other treatments.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.22 no.11
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• pp.1448-1454
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• 2018

In an optical observing system, three pairs of observations at equal time intervals are required for the orbit determination method to obtain orbital information of an unknown space objects. In this paper, we propose a method of estimating a streak for acquiring three pairs of observations using one streak image information. Satellite trajectory simulation data were generated for nine cases using the STK program in order to verify the characteristics of the orbit of space object and estimation performance. Simulation was performed by applying three approaches that can estimate the next streak position after a few seconds from one streak image information, and the estimation performance was evaluated. Linear vector method and Kalman Filter method based on the linear assumption tend to increase the estimation error in the region where the nonlinearity is large. However estimation method using the polynomial curve fitting based on the least square method showed smaller and uniform error result than the previous methods.

• Journal of Advanced Navigation Technology
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• v.26 no.1
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• pp.29-34
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• 2022

In this paper, the design of a triple dipole quasi-yagi antenna operating in the 2.45 GHz and 5 GHz wireless LAN frequency bands and the 3.5 GHz WiMAX frequency band was studied. The proposed quasi-Yagi antenna consists of three dipoles connected in series with a V-shaped ground plane. The longest half-bow-tie-shaped dipole resonates in the 2.45 GHz band, whereas the medium-length dipole resonates at 3.5 GHz. The shortest dipole resonates in the 5 GHz band. By adjusting the length and width of the dipoles and the spacings between the dipoles, a triple-band directional antenna operating in the 2.45 GHz, 3.5 GHz, and 5 GHz bands are designed, and fabricated on an FR4 substrate with a size of 45 mm × 55 mm. It was confirmed that the fabricated antenna operates in the designed triple bands of 2.32-2.57 GHz, 3.26-3.69 GHz, and 4.50-6.56 GHz for a voltage standing wave ratio less than 2. Gain is maintained above 3 dBi in the three bands.