• Nutrition Research and Practice
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• 제16권sup1호
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• pp.113-125
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• 2022

In the current years, it has now become necessary to establish standards for micronutrient intake based on scientific evidence. This review discusses issues related to the development of the 2020 Dietary Reference Intakes for Koreans (KDRI) for magnesium (Mg), zinc (Zn), and copper (Cu), and future research directions. Following issues were encountered when establishing the KDRI for these minerals. First, characteristics of Korean subjects need to be applied to estimate nutrient requirements. When calculating the estimated average requirement (EAR), the KDRI used the results of balance studies for Mg absorption and factorial analysis for Zn, which is defined as the minimum amount to offset endogenous losses for Zn and Mg. For Cu, a combination of indicators, such as depletion/repletion studies, were applied, wherein all reference values were based on data obtained from other countries. Second, there was a limitation in that it was difficult to determine whether reference values of Mg, Zn, and Cu intakes in the 2020 KDRI were achievable. This might be due to the lack of representative previous studies on intakes of these nutrients, and an insufficient database for Mg, Zn, and Cu contents in foods. This lack of database for mineral content in food poses a problem when evaluating the appropriateness of intake. Third, data was insufficient to assess the adequacy of Mg, Zn, and Cu intakes from supplements when calculating reference values, considering the rise in both demand and intake of mineral supplements. Mg is more likely to be consumed as a multi-nutrient supplement in combination with other minerals than as a single supplement. Moreover, Zn-Cu interactions in the body need to be considered when determining the reference intake values of Zn and Cu. It is recommended to discuss these issues present in the 2020 KDRI development for Mg, Zn, and Cu intakes in a systematic way, and to find relevant solutions.

• 한국심리학회지 : 문화 및 사회문제
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• 제11권3호
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• pp.41-66
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• 2005

본 연구는 탈북자들의 가치관, 라이프스타일, 귀인양식, 고정관념 등을 중심으로 한 심리적 특성을 남한주민들과 비교하여 그 차이점을 살펴보고, 이러한 심리적 특성이 소외감에 어떠한 영향을 미치는지를 알아보았다. 연구 결과, 가치관에서 탈북자들은 남한주민들에 비해 '개인이나 가족'보다는 '나라'를, '출세'보다는 '부모봉양'을, 인생을 잘사는 것은 '풍부하게 사는 것'보다 '깨끗이 사는 것'을 더 중요하다고 생각했다. 라이프스타일에서는 탈북자들이 남한주민들에 비해 '전통적 가족주의', '전통적 집단주의', '사회의식', '전통위계 의식'에서 유의하게 높게 나타났다. 귀인양식에서 탈북자들은 남한주민들에 비해 내외귀인 항목에서 내적귀인이, 일관성 항목에서는 일시성보다는 항상 일어날 것이라고 귀인 하는 경향이 유의하게 높게 나타났다. 고정관념에서 남한주민들은 탈북자들에 대해 반항적, 비판적, 이기적, 경쟁적으로 지각하는 등 탈북자 스스로가 평가한 특성보다 더 부정적으로 지각하였다. 소외감의 경우 탈북자들은 소외영역에서는 일로부터의 소외감이 가장 높았으며, 소외유형에서는 무력감이 가장 높았다. 탈북자들의 소외감에 영향을 미치는 요인을 살펴본 결과, '내외귀인', '문화개방성', '풍요로운 생활' 등의 순이었다. 마지막으로 본 연구의 결과 및 시사점 등에 대해 논의하였다.

• 한국융합학회논문지
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• 제8권2호
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• pp.63-72
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• 2017

본 연구는 간호대학생의 DNR에 대한 융합적 인식 및 윤리적 태도를 파악하여 DNR 환자간호에 도움이 되는 기초자료로 활용하고자 시도하였다. G광역시 4년제 간호대학생 306명을 대상으로 2016년 6월 1일부터 2016년 7월 10일까지 설문조사하였고, SPSS 23.0 Program을 이용하여 최종 분석하였다. 분석결과 DNR에 대한 인식은 DNR의 필요성, 환자와 가족의 의지에 의한 DNR 결정, 문서화된 지침서의 필요성에 찬성하였다. 윤리적 태도는 환자의 의지에 의한 결정, 치료범위, 설명 여부, 지침에 따른 결정에 찬성하였고, 주치의에 의한 결정, 기본간호 제공 감소에는 반대하였다. 일반적 특성에 따른 윤리적 태도는 학년, 임상실습경험, 윤리가치관에 대한 교육경험, DNR에 대한 교육경험, 삶에 대한 만족도, 죽음에 대한 가치관에 따라 유의한 차이가 있었다. 본 연구결과를 토대로 DNR 결정에 관한 기준 및 지침을 마련하기 위한 지속적인 후속연구가 필요하다고 사료된다.

• 응용통계연구
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• 제24권6호
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• pp.1033-1043
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• 2011

본 논문에서는 KOSPI지수와 원-달러 환율의 로그수익률을 사용하여 비대칭 이분산성에 대해 연구한다. 커널 density plot과 상승기와 하강기의 평균, 분산을 검토하여 이들 시계열의 변동의 비대칭성에 대한 윤곽을 파악하고 GARCH군의 여러 비대칭 모형을 적합하여 비대칭성을 실증적으로 파악한다. 또한 최종선택 모형인 EGARCH 모형을 바탕으로 부트스트래핑을 사용하여 미래 시점의 변동성인 조건부 분산의 기대치를 예측하고 예측표준오차를 구해본다.

• 한국물환경학회지
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• 제28권4호
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• pp.531-537
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• 2012

The information about the physicochemical environments, the species distribution and community of the epilithic diatom cells in Pyengchang river and inflow streams of Gangwon-do were studied for assessment of biological water quality from June 2008 to October 2010. Total 112 diatom taxa were identified with 2 orders, 9 families, 26 genera, 95 species and 17 varieties. Among the total taxa identified, 13 taxa, 52 taxa and 15 taxa represented the family Achnanthaceae, Naviculaceae and Bacillariaceae, respectively. The pH values of the water was found to be neutral to alkaline due to the limestone grounds of Pyengchang river and inflow streams. The 13 taxa including Epithemia adnata, belonged to alkaline-water diatoms, and three species - Cymbella japonica, Eunotia major and Fragilaria capitellata - are known to be acidic-water species. The species, Hannaea arcus, known as a cryophilic and mountain periphyton was identified at IF2, IF3 and IF4 in low water temperature environments at high altitudes, being a dominating species in P1 and IF1. Four saproxenous species - Achnanthes convergens, Cocconeis placentula var. lineata, Cymbella turgidula and Hannaea arcus - were dominant at some sampling sites. For biological water quality assessment, IF2, IF3 and P3 showed low water quality class. The values of DAIpo and TDI were 10.6 ~ 98.0 and 13.8 ~ 94.2, respectively. Therefore, biological water quality in Pyengchang river and inflow streams was relatively desirable.

• Human Ecology Research
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• 제54권2호
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• pp.207-225
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• 2016

This study investigated a conceptual framework of fashion consumers' purchase decision-making styles related to behavioral typology of personality. In response to critiques on fragmented and varied use of personality measurements, this study selectively tested and verified an alternative typological model of Enneagram value systems and self-construal levels that could explain the fashion consumers' typological propensities in purchase decision-making. One hundred-item measurement scale for the fashion consumers' purchase decision-making styles was developed based on the extensive literature. Three groups of fashion major students, a total of 107 participants, who respectively participated in 2-hour-long Enneagrams seminars from spring 2013 to fall 2014, were asked to re-sentence the question items to clearly reflect their Enneagram personality to make purchase decisions. Participants described their propensities in their own words about the most comfortable state during the 5-step processes of the purchase decision making process. The revised scale was distributed to 423 participants in January 2016, and the results verified the group differences in various styles in the process of purchase decision-making corresponding to the typological variables discussed in Enneagram. The correlation between Enneagram core values embodied by fashion consumers during the stages of purchase decision-making in extensive levels of self-construal were verified in the context of their fashion decision making. This study found the possibility of the typological approach toward Enneagram types of personality to be applicable to explain and predict peculiar facets of fashion consumers' purchase decision-making styles.

• 가정과삶의질연구
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• 제24권2호
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• pp.27-42
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• 2006

This study examined consumers' awareness of apartment brands and the purchase intention of apartments with brand names. This study compared apartment brand awareness with purchase intention in terms of consumers' socio-economic and housing characteristics. Also, it identified the factors that influence consumers' awareness and purchase intention of apartment brands. The data were obtained via a questionnaire completed by adults 20 years of age and olde. (N=383), and were analyzed by t-tests, ANOVA, chi-square tests, multiple regression, and logistic regression analyses. The findings of this study are as follows: First, both consumers' awareness and purchase intention of apartment brands were higher among married males in their 30s and 40s than among unmarried females in their 20s and 50s. For consumers who had graduated from graduate schools, both awareness and purchase intention of apartment brands were lower than other groups. Second, consumers dwelling in apartments or row houses showed higher awareness of apartment brands. And those who lived in row houses were more likely to consider purchasing apartments with brand names. Third, every factor of consumers' housing values was higher than the middle point of the scale. Especially, economic and social values of housing were important factors for both awareness and purchasing intention of apartment brands. Fourth, the apartment brand awareness had a positive effect on the purchase intention of the apartments with their own brands.

• BMB Reports
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• 제31권6호
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• pp.560-564
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• 1998

Echinomycin-7 is an echinomycin derivative, Smethylated sulfonium perchlorate of echinomycin. We studied the in vitro cytotoxicity and in vivo antitumor activity of echinomycin-7 against P388 leukemia cells and compared the results with echinomycin. With respect to the cytotoxic effects, echinomycin-7 had cell line-dependent $IC_{50}$ values while echinomycin had similar values to several tumor cell lines. Also, in vivo antitumor activities were observed in tumor-bearing mice treated with both agents, which showed that echinomycin-7 had a broad therapeutic dose range. We also observed the apoptosis on leukemia cells treated with echinomycin-7 which exihibited the ladder pattern of DNA on electrophoresis. In addition to apoptosis, echinomycin-7 arrested $G_1/S$ phases of the cell cycle at the same time. We then examined the signaling pathway of echinomycin-7-induced apoptosis and showed that ERK of the MAP kinase family was activated and translocated into the nucleus by echinomycin-7 stimulation. This study suggests that echinomycin-7 acts as an antitumor agent through in vitro cytotoxicity and has in vivo antitumor activity against leukemia cells, and that the echinomycin-7- induced apoptosis might involve signal transduction via MAP kinases.

• Advances in Traditional Medicine
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• 제5권3호
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• pp.246-250
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• 2005

A number of species of the genus Centaurea (Family: Asteraceae), distributed in various parts of Asia, Europe and North America, have been used in traditional plant-based medicine and reported to possess various medicinal properties. As part of our continuing evaluation of plants from the genus Centaurea for their phytochemistry and biological activities, the dichloromethane (DCM) and methanol (MeOH) extracts of the seeds of Turkish Centaurea species, C. bornmuelleri, C. huber-morathii and C. schiskinii, were screened for antioxidant and antibacterial activities. Among the three species, C. huber-morathii displayed the most prominent antibacterial activity. Both the MeOH and DCM extracts of this plant showed activity against Citrobacter freundii, Enterococcus faecalis and Salmonella goldcoast with the MIC values within the range of $1\;{\times}\;10^{-2}\;to\;1\;{\times}\;10^{-3}\;mg/ml$. The MeOH extract of C schiskinii showed activity $(MIC\;=\;1\;{\times}\;10^{-1}\;mg/ml)$ against Citrobacter freundii and Staphylococcus aureus. While the DCM extract of C. bornmuelleri was only active against Staphylococcus aureus $(MIC\;=1\;{\times}\;10^{-2}\;mg/ml)$, the MeOH extract did not show any inhibitory activity at test concentrations. The DCM and MeOH extracts of all three species demonstrated good degree of antioxidant property in the DPPH assay with the $RC_{50}$ values ranging from $72\;{\times}\;10^{-2}\;to\;31{\times}\;10^{-3}\;mg/ml$. Among these extracts, the MeOH extract of C. hubermorathii was the most active antioxidant extract $(MlC\;=\;31\;{\times}\;10^{-3}\;mg/ml)$.

• Spatial Information Research
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• 제17권4호
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• pp.455-462
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• 2009

원격탐사 영상에서 압축을 위한 근최적의 PSNR 값을 찾는 방법을 연구하였다. 예상 웨이블릿쌍은 다양한 영상에서 최적의 결과로 나타났다. 영상처리를 위한 최고의 웨이블릿쌍을 찾는 규칙은 없다. 제시된 알고리즘에 따라 예상 웨이블릿쌍이 다양한 종류의 영상에서 최적의 결과를 나타냈다. 먼저 세 개의 웨이블릿 패밀리에서 PSNR 값의 변화를 분석하였다. 직교 웨이블릿 패밀리에서는 많은 경우에 웨이블릿 필터의 길이가 길수록 높은 PSNR 값을 나타내지만, 그 증가 비율이 점차로 작아졌다. 연산비용의 측면에서 중간 필터길이의 웨이블릿을 제안한다. 쌍직교 웨이블릿 패밀리에서는 필터의 길이와 PSNR값의 관계를 예측하기는 어려웠다. 다차원 웨이블릿 분석에서는 세 개의 웨이블릿 패밀리가 3단계까지 처리되었다. 쌍직교 웨이블릿 패밀리는 최대 PSNR 값에서 불규칙한 패턴을 보였지만, 직교 웨이블릿 패밀리는 규칙적 패턴을 나타냈다. 직교 웨이블릿 패밀리는 1단계 결과로부터 근최적의 웨이블릿쌍을 예상할 수 있었다.