• Journal of the Korea Computer Industry Society
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• v.9 no.5
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• pp.191-196
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• 2008

The purpose of this study is to investigate the effect of number representation activities using computer software on young children's ability in mathematics. The effect of the number representation activities using computer software will be shown differently according to the age. The effect of the number representation activities using computer software will be shown differently according to the genders. The result of this study has shown that it gives a positive influence to the young children's mathematical ability.

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 1998.10a
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• pp.152-152
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• 1998

• Proceedings of the Korean Society for Food Science of Animal Resources Conference
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• 1998.10a
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• pp.153-153
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• 1998

• Korean Journal of Childcare and Education
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• v.9 no.6
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• pp.107-127
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• 2013

The purpose of this study was to investigate the differences in children's reading abilities of environmental print and phonological awareness by children's age and the relationship between children's reading abilities of environmental print and phonological awareness. The subjects were 90 children, 3 to 4 years of age. The Children's Reading Abilities of Environmental Print Scale (CRAEPS) developed by Son (2012) and Phonological Awareness Scale (PAS) revised by Choi (2007) were used to measure children's reading ability of environmental prints and phonological awareness. The results of this study were as follows: Firstly, 4-year-olds performed significantly better than 3-year-olds on the environmental print reading tasks. Also, 4 year-olds scored significantly higher than 3-year-olds in syllable counting, syllable deletion, and phoneme substitution. Secondly, children's scores on the environmental print reading tasks were positively correlated with phonological awareness. In other words, the 3-year-olds who could read environmental prints better got higher scores in syllable counting and the 4-year-olds who could read environmental prints better got higher scores in syllable counting, syllable deletion, and phoneme substitution.

• Polymer(Korea)
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• v.37 no.3
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• pp.316-322
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• 2013

In this study, poly(ethylene terephthalate) (PET) was treated with fluorination and ultrasonic washing treatment for hydrophilic modification of PET film. We measured the change of surface modified PET film surface characteristics using contact angle, surface free energy, FE-SEM, AFM and XPS. After direct fluorination and ultrasonic washing treatment, the water contact angle was measured to be $10.81^{\circ}$, 85% reduction compared to the untreated PET film. Total surface free energy has been measured to be $42.25mNm^{-1}$, 650% increase compared to the untreated PET film. Also RMS roughness has been measured to be 1.965 nm, 348% increase compared to the untreated PET film. Hydrophilic functional group C-OH bond concentration has increased approximately 3 times. These results are attributed to the hydrophilic functional group and cavitation due to chemical etching. From this result, it was suggested that the fluorination-ultrasonic washing treatment method could be useful to make PET film surface hydrophilic.

• Korean Journal of Fisheries and Aquatic Sciences
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• v.30 no.3
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• pp.466-472
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• 1997

Peptides separated from fish paste washing liquid of an Alaska pollak (Theragria chalcogramma) were purified and characterized. The fish paste washing liquid (supernatant) was separated by centrifugation of fish paste homogenate. The fish paste washing liquid of $0.5\%$ concentration was hydrolyzed for 24 hour at $50^{\circ}C$ by immobilized protease in bioreactor and decomposing liquid of protein having $50\%$ decomposing rate (OPA method) was obtained. The crude peptide fractions were obtained from this liquid by Dowex 50w $(H^+)$ column chromatograpy. Purified peptides (SP-fraction peptides) were fractionated by using SP-Sepadex C-25 $(H^+)$ column chromatography. Molecular weights and amino acid compositions of these peptides were estimated by Sephadex G-50 column chromatography and HPLC, respectively. when the washed peptides was eluated with $0.6\~0.9\%\;and\;1.2\~2.0\%$ of NaCl, peptides composed of weakly basic amino acids and strongly basic amino acid were respectively eluted. Molecular weights of each peptide fractions showed the broad distribution from 1,000 Da to 3,000 Da in the order of SP-4>SP-3>SP-2>SP-1. Peptides contained a large quantity of glycine, arginine, glutamic acid, and alanine in the washed peptide and its SP-tractions, respectively.

• Microbiology and Biotechnology Letters
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• v.43 no.1
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• pp.38-44
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• 2015

This study was conducted to investigate the effects of electrolyzed water (EW) and hot-air-drying with ultraviolet light (UV) to reduce coliform bacteria of Undaria pinnatifida (UP). The UP was washed in the order of 15% EW, tap water (TW), and distilled water (DW) under following conditions: 15% EW for 10 min (washing: 1 time), TW for 1 min, and DW for 10 min (washing: 5 times). Viable cells, coliform, and mold counts were at 10²-10³ CFU/g in untreated samples. After EW treatment, viable cells, coliform, and molds were not detected in whole samples or on the surface of UP. But, after hot-air-drying at 48°C for 48 h, the number of viable cells, coliform, and molds were 10¹-10⁵ CFU/g. After hot-air-drying at 48°C for 48 h with UV (12-48 h), viable cells, coliform, and molds were not detected in whole samples or on the surface of UP. In respect of color value, there were no significant changes. In sensory evaluation, the UP with hot-air-drying with UV (12 h) had the highest score in overall preference among UV treatment groups. These results suggest that the treatments at 15% EW for 10 min and hot-air-drying at 48°C for 48 h with UV (12 h) were effective to reduce coliform bacteria of the dried Undaria pinnatifida.

• The Monthly Diabetes
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• s.208
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• pp.25-28
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• 2007

운동요법은 인슐린이 발견되기 수세기 이전부터 당뇨병의 치료로 이용되어 왔으며, 운동이 당뇨병환자의 신체 대사에 미치는 단기 및 장기 효과에 대해서도 이미 많은 연구결과들이 보고되어 그 유용성이 증명되었다. 그러나 많은 당뇨병환자들이 막상 운동을 시작하려해도 어떻게 시작하는 것이 효과적이고 어떤 점을 유의해야하는 지에 대해서는 잘 알지 못하고 있는 것이 사실이다. 그래서 여기서는 당뇨병환자에게 있어서 실제적인 운동 시 주의해야 할 점에 대해서 알아보고자 한다. 사실 운동프로그램을 시작하기 전에 당뇨병환자는 적절한 진단 검사와 자세한 의학적 평가가 이루어져야만 한다. 여기에는 운동에 의해서 악화될 수 있는 혈관성 합병증의 유무도 자세히 살펴보아야만 한다. 심장, 혈관, 눈, 신장, 신경계에 영향을 미치는 질병의 증상과 증후에 초점을 맞추어 세심한 병력과 신체진찰을 받고 환자 개개인에 대한 위험을 최소화 할 수 있는 개별화된 운동처방에 따라 운동을 시작하는 것이 바람직하다.

• Korean Journal of Child Studies
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• v.14 no.1
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• pp.23-37
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• 1993

The purpose of this study was to examine the development of rational counting, addition and subtraction competence and the correlation between competence in rational counting, addition, and subtraction in three-, four- and five-year-old children. The subjects were 156 preschoolers living in Seoul. The experimental materials consisted of a set of 20 props for rational counting, addition, and subtraction tasks. The addition and subtraction tasks each consisted of a set of 6 problems. The data were analyzed by ANOVA, Duncan multiple range test, and Pearson's r. The results indicated that 1) there were significant differences in the development of competence in rational counting, addition, and subtraction by age, 2) there were no significant differences in competence in rational counting, addition, and subtraction by gender, 3) there were positively high correlations of competence rational counting, addition, and subtraction by age.

• Journal of the Korean institute of surface engineering
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• v.20 no.2
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• pp.74-76
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• 1987

지난 3월초 1회용 주사기 메이커인 H사에 기술지도시 정밀한 공차로 제조된 주사기가 그 많은 병원에서 단지 1회 사용후 버리는 것이 무척이나 아까와서 이의 재활용, 도금액 관리에 적용코자 고안하여 특허(?)로 등록하려다가... 여러 회원(Plater)에게 널리 알려 품질 향상과 제조원가 절감의 도금액 관리에 쉽고 간단히 활용하도록 우선 1차로 각종 도금의 전 공정중 산처리액과 수세수 관리에 대하여 기술코져 한다.