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20대 여성의 화장품 선호 구매장소에 따른 라이프스타일 연구
박세빈 ( Se-bin Park ),최미옥 ( Mee-ok Choi ) 한국미용학회 2020 한국미용학회지 Vol.26 No.5
Women in their 20s are in a period of increasing sensitivity to beauty as they begin to be sensitive to fashion and pursue their own image and expression of personality. Therefore, for women in their 20s, this researcher would like to understand the lifestyle according to the preferred place to buy cosmetics. A questionnaire was used to achieve the purpose of the study, and the specific contents consisted of age, final education, occupation, monthly income 4 questions, cosmetics purchase preference place 4 questions, and lifestyle 29 questions, total 37 questions were. The survey period was conducted from May 1 to June 5, 2020, and SPSSWIN 21.0 program was used to process the collected data and statistics, and frequency analysis, reliability analysis, descriptive statistics analysis, t-test and one-way ANOVA were performed. The results of this study are as follows. First, age-related conservatism·traditional emphasis on lifestyle, the females aged 27-29 were the highest. Second, in the case of conservatism·traditional emphasis on lifestyle according to the occupation, higher in workers than in students. Third, as a result of looking at the lifestyle according to monthly income, the aesthetic orientation was high with monthly income of 1,000,000-1,500,000 won, the social activities were high with monthly income of 300,000-500,000 won, and the social activities were high. Fourth, the difference in lifestyle pursuit according to the preferred location of purchase, e-commerce purchase preferences were higher in fashion pursuits than in store direct purchase preferences. Fifth, in e-commerce, aesthetic orientation and social activities on lifestyle according to monthly purchase costs, the aesthetic orientation and social activities were the highest among women with an e-commerce monthly purchase cost of more than 200,000 won. Sixth, the conservatism·traditional emphasis on lifestyle according to e-commerce purchase, “other” in the e-commerce purchase disadvantage had the highest. Based on the results of this study, it was possible to find out the relationship between the places where women in their twenties purchase cosmetics according to their lifestyle. This is reflected in the makeup behavior and purchase, and as an effective marketing strategy for the development of the cosmetics industry in the cosmetics industry, future research will require research by expanding the age of the study subjects.
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폐 리튬 이차전지로부터 회수된 황산코발트 제조 및 이를 이용해 합성된 산화리튬코발트 양극활물질의 전기화학적 특성
김미소,하종근,박세빈,안주현,최임식,조권구,Kim, Mi-So,Ha, Jong-Keun,Park, Se-Bin,Ahn, Jou-Hyeon,Choi, Im-Sic,Cho, Kwon-Koo 한국전기화학회 2014 한국전기화학회지 Vol.17 No.2
본 연구에서는 폐 리튬이차전지의 스크랩으로부터 순도 높은 황산코발트($CoSO_4$) 용액을 회수하고, 회수된 용액을 이용하여 리튬이차전지의 양극활물질인 $LiCoO_2$를 제조하여 전기화학적 특성을 평가하였다. 황산코발트의 제조는 황산과 과산화수소수를 이용하여 원료물질로부터 금속물질을 녹여내기 위한 침출단계, 가성소다를 이용한 pH 조절로 1차 불순물을 제거하기 위한 중화공정 및 D2EHPA와 $CYANEX^{(R)}272$를 이용하여 2차 불순물을 제거하기 위한 용매추출공정을 거쳐 고순도의 용액을 회수한다. 회수된 황산코발트는 증류수와 희석하여 6 wt.% 황산코발트 용액으로 만들고, 다시 옥살산과 혼합 및 교반 후 건조, 하소 및 리튬의 원료가 되는 $Li_2CO_3$ 분말과 혼합 후 합성 공정을 거쳐 이차전지의 양극활물질인 $LiCoO_2$를 제조하였다. 이를 이용하여 전극을 조립하고, 전기화학적 특성을 평가하였다. 전기화학적 특성은 본 실험에서 합성된 $LiCoO_2$와 상업용 $LiCoO_2$(Aldrich사)를 비교하였으며, 결과는 유사하거나 혹은 합성된 $LiCoO_2$가 더 우수한 것을 확인할 수 있었다. 따라서, 본 실험을 통해 양극활물질의 재활용 가능성을 확인하였다. The electrochemical properties using the cells assembled with the synthesized $LiCoO_2$(LCO) were evaluated in this study. The LCO was synthesized from high-purity cobalt sulfate($CoSO_4$) which is recovered from the cathode scrap in the wastes lithium ion secondary battery(LIB). The leaching process for dissolving the metallic elements from the LCO scrap was controlled by the quantities of the sulfuric acid and hydrogen peroxide. The metal precipitation to remove the impurities was controlled by the pH value using the caustic soda. And also, D2EHPA and $CYANEX^{(R)}272$ were used in the solvent extraction process in order to remove the impurities again. The high-purity $CoSO_4$ solution was recovered by the processes mentioned above. We made the 6 wt.% $CoSO_4$ solution mixed with distilled water. And the 6 wt.% $CoSO_4$ solution was mixed with oxalic acid by the stirring method and dried in oven. $LiCoO_2$ as a cathode material for LIB was formed by the calcination after the drying and synthesis with the $Li_2CO_3$ powder. We assembled the cells using the $LiCoO_2$ powders and evaluated the electrochemical properties. And then, we confirmed possibility of the recyclability about the cathode materials for LIBs.
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조영학(Yeong-hak Joe),이도형(Do-hyung Lee),지윤정(Yun-jung Ji),김수지(Su-ji Kim),박세빈(Se-bin Park),김용권(Yong-gwon Kim),배석환(Seok-hwan Bae) 한국산학기술학회 2015 한국산학기술학회 학술대회 Vol.2015 No.1
본 연구의 목적은 임상의 핵의학, PET 진단 분야에서 진단 시에 사용되는 방사성 동위원소 중 99mTc, 131I, 18F, 세 가지를 이용하여 납가운의 두께 별 에너지스펙트럼을 측정하고 납가운 0.3, 0.5mmPb에 대한 차폐율을 측정하고자 하였다. 에너지 스펙트럼 측정의 경우 자체 제작한 방법으로 측정하였고 차폐율 및 선량 측정의 경우 납가운과 선원의 거리에 대해 선원과 측정기에 대해 납 가운의 위치를 달리 하여 3가지 조건으로 나누어 각각 20회씩 측정을 하여 평균값을 산출하였다. 에너지 스펙트럼 상에서는 납가운을 위치하였을 때 본래 방사성 동위원소로부터 방출되는 에너지 외의 에너지 피크영역이 측정되었고 차폐율 및 선량측정에서는 99mTc의 경우 어느정도의 차폐율이 측정되었지만 131I, 18F의 경우 납가운을 이용하여 차폐를 할 경우 차폐율이 매우 미비하거나 음수의 값이 측정되었다.
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太陽熱에 依한 學校附帶施設 暖房 시스템 開發에 關한 硏究
崔京錫,尹世元,朴世彬 慶熙大學校 1979 論文集 Vol.9 No.-
In this paper, the required collector dimension and storage tank size are calculated for all weather, all solar space heating of a model house died as school accomodation of a primary school located in Banwal, Whasungkun, Kyongkido, Korea. Numerical analysis is shown step by step to show its principle. But this paper by no means is meant to stimulate zero-energy house concept. To support the solar energy use for public building, we have shown one way of solar heating calculation for a strive of its successful utilization.
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