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권석희 한국아동교육학회 2002 아동교육 Vol.11 No.1
The purpose of this study is to investigate home literacy activity affection on children's listening and reading comprehension ability and mathematical literacy. The hypotheses of this study are as follows; First, home literacy activity will affect on children's listening and reading comprehension ability. Second, home literacy activity will affect on children's mathematical literacy. Third, children's listening and reading comprehension ability will affect on children's mathematical literacy. The subjects for this study are 131 children from three kindergartens in Daegu metropolitan city, all of whom are 5 year 7months old, composing 63 female and 68 male. The test instrument of this study is Home Literacy Activity Questionnaire made by Lee(1993), SVT Listening Comprehension Test by Jung, Nam-Mi(1997), Reading Comprehension Test by Sulzby(1985), Basic Mathematical Concepts Test by Chung, Hee -Dal(1990), Problem Solving Performance Test by Hwang, Jeong-sook(1996), Mathematical Attitudes Test by Hwang, Jeong-sook(1996). The data gained from the research were analyzed by Pearson's correlation coefficient, path analysis, and regression analysis. The conclusions of this study are as follows; First, there is positive correlation between home literacy activity and children's listening and reading comprehension ability. Especially oral language interaction, one of home literacy activity subvariables, affects on children's listening and reading comprehension ability and it explains 8% about that ability. Second, there is positive correlation between home literacy activity and children's mathematical literacy. Especially model reader activity, one of home literacy activity subvariables, directly affects on children's mathematical literacy. Third, there is positive correlation between children's listening and reading comprehension ability and children's mathematical literacy. Especially model reader activity, one of home literacy activity subvariables, and children's listening and reading comprehension ability affect on children's mathematical literacy, and it explain 11% about that ability.
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권석희,한상범,곽다희,송지현,박경원 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
Various doped porous carbon nanomaterials to replace Pt-based catalysts for oxygen reduction reaction(ORR) in acid and alkaline media have been intensively studied. Herein, doped porous carbonnanostructure materials as non-precious metal catalysts for ORR are synthesized using different weightratios of polyaniline (PANI) to dicyandiamide (DCDA) as carbon source and dopants with iron salt tocontrol the specific surface area and nitrogen doping content. The as-prepared samples exhibit welldefinedporous carbon structure that consists of micro- and meso-pores, high specific surface areas,increased amount of nitrogen dopant, and relative content of graphitic N and pyridinic nitrogen N. Amongthese doped porous carbon nanostructure catalysts, the catalyst synthesized using a proper ratio of PANIto DCDA exhibits significantly improved electrocatalytic performance for ORR, i.e., high half-wavepotential, high specific activity, and enhanced stability in both acid and alkaline media, because of thehigh graphitic N/pyridinic nitrogen N and micro-pore ratios.
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