개질한 zeolite를 이용한 중금속제거

최희정 ( Heejeong Choi ),유성환 ( Sungwhan Yu ) 한국수처리학회 2015 한국수처리학회지 Vol.23 No.4

The aim of this study was to investigate the heavy metal removal using modified zeolite with magnesium (Mg-zeolite). Mg-zeolite adsorbed two fold higher Cd than that of K-zeolite. In addition, Mg-zeolite adsorbed successfully 100% of the Cd, As, Cu and Mn at the following optimal Mg-zeolite dosage: 30 mg/L for As and Cd, and 15 mg/L for Cu and Mn. The relationship between heavy metal concentration and amount of Mg-zeolite was determined highly linear; 0.9982, 0.9965, 0.9972 and 0.9964 for Cd, Mn, Cu and As, respectively. The bio-adsorbent, Mg-zeolite, can be a promising adsorption due to its high efficiency and low dose requirements. In addition, Mg-zeolite does not contaminate treated wastewater, which can be recycled to reduce not only the cost and the demand for water but also the extra operational costs for reusing wastewater.

성인자녀-부모관계와 부모의 인지기능

최희정(Heejeong Choi),민주홍(Joohong Min) 가정과삶의질학회 2015 가정과삶의질연구 Vol.33 No.4

기혼자녀의 성과 출생순위가 부모와의 접촉과 경제적지지에 미치는 영향

최희정(Heejeong Choi),빈보경(Bokyoung Bin) 가정과삶의질학회 2016 가정과삶의질연구 Vol.34 No.2

다자녀와의 접촉빈도 및 접촉유형과 중노년기 주관적 복지감

최희정(Choi, Heejeong),남보람(Nam, Boram) 가정과삶의질학회 2019 가정과삶의질연구 Vol.37 No.4

점토광물이 콩나물의 생장과 미네랄 함유량에 미치는 영향

최희정(Heejeong Choi),이승목(Seungmok Lee) 한국지반환경공학회 2013 한국지반환경공학회논문집 Vol.14 No.8

본 연구에서는 점토광물인 황토 지장수와 견운모 상등액을 이용하여 콩나물의 생장률과 무기이온의 함량을 비교하고자 하였다. 실험결과 콩나물의 총 길이는 견운모 상등액 콩나물이 황토 지장수에 비해 14.71%, 수돗물에 비해 50% 길었다. 또한 뿌리의 길이는 견운모 상등액 콩나물의 뿌리가 황토 지장수에 비해 36.05%, 수돗물에 비해 17.30% 길었다. 이는 견운모에 함유되어 있는 K? 성분과 미네랄이 식물의 뿌리에 작용하여 줄기도 윤기가 있게 성장을 한 것 같다. 견운모 상등액 콩나물의 경우 황토지장수로 재배한 콩나물에 비해 11.56%, 수돗물과 비교하여 13.48%의 많은 미네랄을 함유하고 있었다. 다양한 견운모의 농도를 이용하여 콩나물의 생장률과 미네랄 흡수량을 비교한 결과 100g/L의 농도에서 가장 좋은 생장률을 나타내었고, 미네랄의 흡수량은 100g/L와 200g/L가 비슷하여 경제적인 면을 고려한다면 100g/L의 농도가 콩나물을 재배하는데 적합하다고 생각된다. The objective of this research was to investigate the effect of various clay materials on the growth and change in mineral composition of soybean sprout. Further effect of sericite concentration on growth of soybean sprout was optimized. The experiments were carried by using three different viz., loess supernatant, tap water and sericite supernatant. From the obtained results it was found that a significant growth in soybean sprouts was observed while using sericite supernatant this growth was 14.71% and 50% more total growth than that of loess supernatant and tap water. In addition, using sericite supernatant the length of root of soybean sprouts was reached 17.30% and 36.50% longer than that of tap water and loess supernatant. The plausible reason for this growth using sericite supernatant may be due to the presence of various mineral(K?, Ca?) in sericite. Further the mineral contents of sericite supernatant were 11.56% and 13.48% more than that for loess supernatant and tap water. Among the various sericite concentration used it was found that 100g/L sericite supernatant showed significant growth rate compared with other fractions. From the obtained results comparing with all materials 100g/L sericite concentration was economic for the cultivation of soybean sprout.

비혼자녀와 부모의 접촉

최희정(Choi Heejeong) 가정과삶의질학회 2016 가정과삶의질연구 Vol.34 No.5

세대 간 거주근접성과 중고령 부모에게 제공하는 경제적 지원

최희정(Heejeong Choi),남보람(Boram Nam),유수빈(Soo-Bin You) 한국노년학회 2021 한국노년학 Vol.41 No.2

본 연구는 세대 간 거주근접성이 성인자녀가 중고령부모에게 제공하는 경제적 자원이전과 어떠한 관련성이 있는지, 세대간 거주근접성과 경제적 자원이전의 관계가 자녀의 성별에 따라 차이가 나타나는지 살펴보았다. 자녀 본인 뿐 아니라 형제자매의 거주근접성 역시 고려되었다. 미국 등 국외 선행연구는 근거리에 거주하는 형제자매가 제공하는 도구적 지원을 보완하기 위해 원거리에 거주하는 자녀의 경제적 지원수준이 높을 것으로 보았다. 데이터는 한국고령화연구패널 5차(2014)자료를 활용하였으며 연구대상은 부모의 연령이 60세 이상이고 자녀의 연령은 35세에서 55세 사이로 부모가 자녀와 동거하는 경우 분석에서 제외되었다. 부모의 경우 부부가구이거나 배우자와 사별한 독거가구로 구분하였다. 고정효과모형과 확률효과모형으로 가족내 분석을 실시하였고 연구결과는 다음과 같다. 첫째, 부모와 30분 이내 거리에 거주하거나 혹은 1시간 이상 2시간 이내 거리에 거주하는 경우 아들의 경제적 지원액이 딸보다 많았다. 둘째, 선행연구 결과와 달리, 형제자매를 포함하여 모든 자녀가 부모와 1시간 이상 거리에 거주할 때 아들과 딸 성별의 구분 없이 경제적 지원액이 높았다. 세대간 거주근접성과 경제적 자원이전의 관련성은 배우자와 사별한 1인가구 부모가 경제적 지원의 수혜자인 경우 나타나지 않았다. We examined if intergenerational proximity might be associated with upstream financial transfer from adult children to older parents, and whether adult child gender might moderate the association. We considered siblings’ proximity to parents, as well as that of the adult child. Prior work conducted in the US and other countries has suggested that children living further from parents might provide financial support to compensate for instrumental support provided more by siblings living closer to parents. Data were drawn from the Korean Longitudinal Study of Ageing (2014). Our analytic sample consisted of older adults 60+ and their children aged 35 and 55. None of the children co-resided with parents. Parental households consisted of either widowed individuals or married couples. For within-family analyses, fixed effects and random effects regression models were estimated. Results suggest first, sons living within a 30-minute distance, or within an hour to two-hour distance provided more monetary support to married parents compared to daughters. Second, contrary to existing findings, greater financial assistance was provided by sons and daughters when no children lived within an hour distance from their parents. For widowed parents living alone, intergenerational proximity was not associated with the amount of financial transfer from adult children.

기혼자녀와 부모의 특성이 세대 간 거주근접성에 미치는 영향

최희정 ( Heejeong Choi ),남보람 ( Boram Nam ) 한국가족관계학회 2016 한국가족관계학회지 Vol.21 No.1

Objective: This study examined correlates of residential proximity between parents and non-coresident married children. A majority of existing studies on intergenerational living arrangement has focused on exploring factors that are associated with intergenerational coresidence only, despite an increasing number of parents and children who do not live together but close by. Because residential proximity facilitates frequent contacts and support exchanges between the two generations, it is important to understand its correlates. Method: The data were drawn from first wave of the Korean Longitudinal Study of Ageing (KLoSA, 2006), a nationally representative sample of adults 45 years or older and their spouses. The analytic sample consisted of 3,950 parents with 10,946 non-coresident married children. Both regression with robust standard errors and sibling fixed effects regression models were estimated using the reg and xtreg procedures in STATA. Results: Younger, less depressed, and more physically impaired parents lived closer to at least one of their married children (within a 30-minute distance by public transportation). Fathers (compared to mothers), parents living in cities (compared to those living in rural areas), parents with at least one co-resident child or fewer numbers of married children tended to have at least one married child living nearby. With regard to child characteristics, married children who were less educated, homeowners, and had more children lived closer to their parents. Also, sons (compared to daughters) lived in closer distance to their parents. Conclusion: Overall, findings suggest that intergenerational residential proximity may primarily be motivated by the childcare needs of married children or parents’ needs for assistance with functional impairment. Also, the traditional patrilineal norms of intergenerational support may still be a critical factor in residential decisions as observed in the difference between married sons and daughters in proximity to their parents.

독일 바이에른 주의 정보 교육과정 분석

최희정 ( Heejeong Choi ),이원규 ( Wongyu Lee ),김자미 ( Jamee Kim ) 한국컴퓨터교육학회 2019 컴퓨터교육학회 논문지 Vol.22 No.1

제 4차 산업혁명 시대의 도래로 세계 각국은 변화하는 사회에 대처하기 위해 정보교육을 강화하고 있다. 본 연구는 독일의 정보 교육과정 분석을 통해 독일의 정보교육 동향을 파악하여, 한국의 정보교육과의 차이를 비교하였다. 독일의 정보교육 분석은 독일 교육의 중심이라 할 수 있는 바이에른 주의 정보교육 내용과 변화를 중심으로 하였다. 분석 결과, 첫째, 초등교육에서는 ‘정보’를 통합교과적 측면에서 접근하고 있으며, 활용 중심의 교육이었다. 둘째, 중등교육에서 충분한 이수시간 확보를 통해 이론과 실습을 경험할 수 있는 교육을 진행하고 있었다. 셋째, 정보교과를 입시에 반영하여, 고등교육과의 연계를 충분히 반영하였다. 분석을 토대로, 체계적인 정보교육을 위해서는 초등교육부터 많은 시수를 확보할 필요가 있으며, 중등교육과 고등교육의 연계를 고려해야 함을 확인하였다. With the advent of the age of the 4th Industrial Revolution, countries around the world are reinforcing informatics education to cope with changing society. The purpose of this study is to analyze the trends in German informatics education through the analysis of the German informatics curriculum, and provide implications for the informatics education of Korea. The analysis of German informatics education focused on the contents and changes of the informatics education of Bayern, which can be said to be the center of German education. As a result of this analysis, first, elementary education approaches ‘informatics’ from the viewpoint of integrated curriculums. Second, secondary education provides education that makes it possible to experience theory and practice by securing sufficient credit hours. Third, they reflected informatics subjects in entrance examinations, and sufficiently ensured links to higher education. This analysis confirmed that systematic informatics education requires many credit hours from elementary education, and links with secondary and higher education must be taken into consideration.

이혼이 중년남녀의 신체 건강에 미치는 영향

장은경(Jang Eunkyung),최희정(Choi Heejeong) 가정과삶의질학회 2017 가정과삶의질연구 Vol.35 No.3