Mesoporous Platinum Electrodes for Amperometric Determination of Sugars with Anion Exchange Chromatography

HAN, Jee Hoon,CHOI, Han Nim,PARK, Sejin,CHUNG, Taek Dong,LEE, Won-Yong The Japan Society for Analytical Chemistry 2010 Analytical sciences Vol.26 No.9

<P>A simple amperometric detection (AD) method based on mesoporous platinum (Pt) electrodes has been developed for the determination of sugars (glucose, fructose, and sucrose) with high-performance anion-exchange chromatography (HPAEC). The amperometric detection is based on the direct oxidation of sugars on mesoporous Pt films formed on a gold electrode. The mesoporous Pt electrode (roughness factor of 243) sensitively responded to glucose, fructose, and sucrose in 80 mM sodium hydroxide solution as an alkaline mobile-phase for HPAEC. Under the optimum conditions, the limits of detection (<I>S/N</I> = 3) in these sugars were 0.24, 0.29, and 1.8 mM, for glucose, fructose, and sucrose, respectively. The reproducibility (relative standard deviation) of the measurements was less than 3.5%. The present method was applied to the determination of sugars in apple juice. The recoveries for all sugars ranged from 97 to 99%.</P>

분산전원의 배전계통 연계검토 시 조류계산 기반의 SVR 효과 분석에 관한 사례연구

유한님(Han Nim Yu),노승길(Seung Gil Noh),최우영(Woo Yeong Choi),국경수(Kyung Soo Kook) 대한전기학회 2019 대한전기학회 학술대회 논문집 Vol.2019 No.7

다문화가정 어머니들의 자녀양육을 위한 부모교육에 대한 요구

한경님(Han, Kyung-Nim) 한국영유아보육학회 2012 한국영유아보육학 Vol.0 No.73

본 연구의 목적은 다문화가정 자녀양육을 위한 부모교육 프로그램의 개발하기 위하여 다문화가정의 자녀양육의 어려움을 알아보고 부모교육 내용에 대한 요구를 알아보는데 있다. 연구대상은 만 3세 이상 자녀를 둔 다문화가정 어머니 109명이며, 질문지를 통해 조사하였다. 연구결과 다문화가정 어머니는 자녀양육의 가장 어려움은 아이를 잘 키울 수 있을지 자신이 없고 부모의 역할에 대한 부족함을 많이 느끼며 이를 위해 부모교육이 필요하다고 인식하고 있었다. 그들 중 93.6%에 이르는 부모들이 도움받기를 원하고 그들을 지원해 줄 부모교육 프로그램이 필요하다고 인식하고 있었다. 결혼이주여성이 한국에 적응하지 못한 상태에서 임신과 출산의 어려움과 자녀양육의 어려움을 겪고 있고, 적절한 부모역할과 자녀양육의 구체적인 방법이 필요한 교육내용으로 결혼이주여성 어머니의 생활에 적용할 수 있는 내용을 희망하였다. 그러므로 특히 결혼 초기 다문화가정의 경우 어머니가 생활문화가 다르고 언어능력이 부족하기 때문에 건강하고 효능적인 자녀양육을 위해서 구체적이고 체계적인 부모역량을 강화시키는 프로그램이 필요한 시점이다. The purpose of this study was to examine child-rearing problems in multicultural families and look into mothers" parental education demand, thus developing a parental education program for child-rearing in multicultural families. Study subjects were 109 mothers in multicultural families who had children of 3 years age and above, and a questionnaire survey of them was carried out. Study findings are as follows: Mothers" biggest problem for child-rearing in multicultural families was their lack of confidence in child-rearing. In addition, they felt much insufficiency in parental roles and perceived the necessity of parental education for it. A 93.6% of them wanted to receive help and recognized the necessity of parental education programs that could provide help to them. Marriage migrant women suffered from pregnancy, childbirth and child-rearing, while they did not properly adapt themselves into Korea yet. They wanted such education that dealing with concrete methods of parental roles and child-rearing and that could be applied to marriage migrant mothers" life. In its early stage of marriage in multicultural families, mothers" living culture is different and their language skills are insufficient. In this vein, it is necessary to provide concrete and systematic programs that strengthen parental competence in order for them to rear children in a healthy and efficient manner.

부모역할 프로그램이 유아기 자녀를 둔 다문화가정 부모의 양육효능감, 역할만족감 및 양육행동에 미치는 효과성에 관한 연구

한경님(Han, Kyung-Nim) 한국영유아보육학회 2014 한국영유아보육학 Vol.0 No.89

본 연구는 유아기 자녀를 둔 다문화가정 부모를 대상으로 부모역할 수행능력을 강화하고, 만족감을 증진시키며, 부모역할의 긍정적 기능을 증진할 수 있는 부모역할 프로그램을 실시하여 프로그램의 효과성 및 다문화가정 지원 프로그램으로서의 적용가능성을 검증하였다. 연구대상은 실험집단 10쌍, 통제집단 10쌍의 유아기 자녀를 둔 다문화가정 부모로 프로그램 실시 전, 종료 직후, 종료 후 1개월 후 시점에서 부모의 양육효능감, 부모역할만족감, 양육행동의 점수를 각각 두 집단을 비교한 결과 부모역할 프로그램은 유아기 자녀를 둔 다문화가정 부모들의 양육효능감과 전반적인 양육능력을 증진하는 데 효과성을 보이는 것으로 나타났으며 부모역할 만족감이 향상되었다. 따라서 본 부모역할 프로그램은 유아기 다문화가정 부모역할에 대한 지원프로그램으로서 긍정적인 영향을 미친 것으로 검증되었다. 이상의 연구결과를 바탕으로 다문화가정에 효과적인 자녀양육에 대한 지원프로그램으로서 부모역할 프로그램이 갖는 실천적 의의와 적용가능성에 대해 제언하였다. The purpose of this study was to carry out a parenting program that could strengthen parents’ ability of parenting, increase their satisfaction with it, and enhance the positive functions of it. The subjects were parents from multicultural families who had children in early childhood. The effectiveness and applicable potential of the program as a support program for multicultural families was examined. The study subjects were 20 pairs of parents from multicultural families (the experiment group, n=10; the control group, n=10), and the scores of parents’ self-efficacy, parents’ satisfaction, and parents’ child-rearing behavior were comparatively examined before/just after/a month after carrying out the program. The study findings are as follows. The parenting program seemed to be effective in increasing parents’ self-efficacy and the overall child-rearing ability of parents in multicultural families who had children in early childhood, and their satisfaction with parenting was increased as well. As a result, the parenting program was verified to have positive effects as a support program for parents in multicultural families who had children in early childhood. Based on the above study findings, the practical implications and applicable potential of the parenting program as an effective support program for the child-rearing of parents in multicultural families were suggested.

저소득가정의 자녀양육부담비용 연구

한경님(Han Kyung-Nim) 한국영유아보육학회 2010 한국영유아보육학 Vol.0 No.61

본 연구의 목적은 저소득가정의 자녀양육에 지출되는 실제적인 경비를 알아보고 자녀 양육부담실태를 분석함으로써 저소득가정의 자녀양육비용 실태에 기초하여 개별가족의 소득수준을 고려한 양육비 지원 여건을 검토하는데 있다. 자녀양육비용으로 식비, 교육비, 여가비, 의복비, 자녀양육대체비로 구분하여 분석하여 만 3세에서 만 5세까지의 저소득가정의 자녀양육비용 지출 결과 가계소득 연 2천만원미만인 가정에서는 월평균 최저 42만4천6백2십5원을 지출하는 것으로 나타났으며, 가계소득 연 3천만원에서 3천6백만원미만인 가정에서는 월평균 최고 백십6만5백십원을 지출하는 것으로 나타났다. 이러한 결과를 통해 볼 때 저소득가정의 자녀양육에 대한 경제적 부담정도가 매우 높다고 할 수 있으며 이것은 가족의 삶의 질과 부모자신에 대한 노후대책마련에 어려움이 따른다. 그러므로 개별아동의 양육에 필요한 기초조사를 통해 적정비용을 산출하여 지원해야 할 것이다. The purpose of this study is to find out the real expenses of low income families for raising their children. In order to analyze the burden that embodies raising children, this study seeks to prove low income families’ struggles towards raising their children. The results show that expenses for raising children include: food, education, clothes, recreation, and the like. For these expenses, a low income family with children between three to five years old and an annual income of up to 20,000,000 won per year spend an average of 425,651 won for the month. For the families with income ranging from 30,000,000 won to 36,000,000 won per year annually, they spend an average amount of 1,160,510 won for the month. As a result, raising children is a burden for low income families. This leads to lack of quality family life and brings difficulties in preparing for the families’ future lives. Therefore, I conclude that computing the expenses of raising one child will help to support low income families.

배전계통 전압제어용 ESS의 역률 운전범위 적용 방법

유한님(Han Nim Yu),노승길(Seung Gil Noh),최우영(Woo Yeong Choi),국경수(Kyung Soo Kook) 대한전기학회 2020 대한전기학회 학술대회 논문집 Vol.2020 No.7

Vegetarian Diet for Cardiovascular Disease Risk Reduction: Cons

Sung Nim Han 한국지질동맥경화학회 2023 지질·동맥경화학회지 Vol.12 No.3

Numerous studies have reported that adopting a plant-based diet can significantly reduce the risk of cardiovascular diseases (CVDs). Not only does a vegetarian diet help mitigate the risk of these diseases, but it also contributes to enhancing environmental sustainability. However, it is not necessary to universally recommend a vegetarian diet as a preventive measure against CVDs. More research is needed to determine whether completely excluding animal products is necessary, or if adhering to a predominantly plant-based diet is sufficient. In this opinion paper, the potential adverse health effects of a vegetarian diet and the barriers associated with adopting it will be discussed, in order to provide a rationale for the disadvantages of using a vegetarian diet for CVD risk reduction.

배전계통의 변동성 신재생전원 수용용량 증대를 위한 BESS 제어 전략 및 실시간 모의해석

유한님(Han Nim Yu),최우영(Woo Yeong Choi),국경수(Kyung Soo Kook) 대한전기학회 2021 전기학회논문지 Vol.70 No.4

This paper proposes a control strategy of Battery Energy Storage System(BESS) for increasing the hosting capacity of the Variable Energy Resources (VER) in the distribution system by resolving any violation in bus voltages and line loading caused by the connection of VER. The effectiveness of the proposed algorithm was verified by study cases employing the real distribution system based test system in terms not only of the long term time-series simulation but also of the real-time simulation.

Amperometric Ethanol Biosensor Based on Carbon Nanotubes Dispersed in Sol–Gel-Derived Titania–Nafion Composite Film

Choi, Han Nim,Lyu, Young-Ku,Han, Jee Hoon,Lee, Won-Yong VCH 2007 Electroanalysis Vol.19 No.14

<P>Composite solution of sol–gel-derived titania and perfluorosulfonated ionomer (Nafion) was used as a solubilizing agent for multiwalled carbon nanotubes (CNT) as well as an encapsulation matrix for alcohol dehydrogenase (ADH) for the fabrication of a highly sensitive and stable amperometric ethanol biosensor. ADH was immobilized within a thin film of CNT–titania–Nafion composite film coated on a glassy carbon electrode. Because of the mesoporous nature of the CNT–titania–Nafion composite film, the present biosensor exhibited remarkably fast response time within 2 s. The presence of CNT in the composite film increases not only the sensitivity of the ethanol biosensor but also the long-term stability of the biosensor. The present biosensor responds linearly to ethanol in the wide concentration ranges from 1.0×10<SUP>−5</SUP> M to 3.0×10<SUP>−3</SUP> M with the sensitivity of 51.6 mA M<SUP>−1</SUP>cm<SUP>−2</SUP>. The present biosensor showed good long-term stability with 75% of its activity retained after 4 weeks of storage in 50 mM phosphate buffer at pH 7.0.</P>

태양광 발전설비 ICT 원격감시 안전관리 기준에 관한 연구

유한님(Han-Nim Yu),조성구(Sung-Koo Cho),이건호(Geon-Ho Lee),김재현(Jae-Hyun Kim),우필성(Pil-Sung Woo),김지연(Ji-Yeon Kim) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.7

태양광 발전설비 연계형 ESS의 사고 예방을 위한 태양광 발전설비의 원격감시 시스템이 필수적이다. 따라서 본논문에서는 기존 태양광 발전설비 모니터링 및 플랫폼 기술 동향을 파악하고, 태양광 발전설비의 ICT 기술을 활용한 원격감시모니터링을 통한 안전관리 시 감시 및 제어 요소를 제시하였다.