박리화와 재적층법을 통한 K₂La₂Ti₃O₁₀부터 유전성 Bi_4-xLa_xTi₃O₁₂(x~2)의 합성

전아영,고지은,김종영,Jeon, A Young,Ko, Jieun,Kim, Jong-Young 한국결정성장학회 2013 韓國結晶成長學會誌 Vol.23 No.1

본 연구팀에서는 층상형 페로브스카이트 구조를 갖는 Ruddlesden-Popper 구조의 $K_2La_2Ti_3O_{10}$의 박리화를 통해 Aurivillius 구조의 $Bi_{4-x}La_xTi_3O_{12}$(x~2) 페로브스카이트 산화물을 성공적으로 합성하였다. 박리화된 란타늄 티타네이트 나노시트는 BiOCl 나노결정구조와 반응시켜 $Bi_{4-x}La_xTi_3O_{12}$(x~2) 결정을 얻어내었다. 박리화된 나노시트 현탁액은 $K_2La_2Ti_3O_{10}$으로부터 수소화된 $H_2La_2Ti_3O_{10}$의 층간에 에틸아민을 삽입시킴으로써 얻어내었다. 투과전자현미경(TEM) 분석을 통해, 란타늄 티타네이트가 에틸아민에 의해 박리화된 것을 확인할 수 있었다. X-선 회절분석(XRD)을 통해, 박리화된 란타늄 티타네이트와 BiOCl의 재적층과정을 거쳐 $700^{\circ}C$ 이상의 열처리 조건에서 $Bi_{4-x}La_xTi_3O_{12}$(x~2)로 형성된 것을 확인할 수 있었다. We have successfully synthesized $Bi_{4-x}La_xTi_3O_{12}$ (x~2) having Aurivillius-type layered perovskite structure from exfoliated layered perovskite oxide of $K_2La_2Ti_3O_{10}$ with Ruddlesden-Popper structure. The reaction between the exfoliated lanthanum titanate nanosheets and BiOCl nanocrystal resulted in the formation of polycrystalline $Bi_{4-x}La_xTi_3O_{12}$ (x~2) after heating above $700^{\circ}C$. Colloidal suspension of the nanosheets could be obtained by intercalating ethylamine (EA) into the protonated lanthanum titanate, $H_2La_2Ti_3O_{10}$, derived from $K_2La_2Ti_3O_{10}$. Transmission electron microscopic (TEM) analysis show that the exfoliated lanthanium titanate nanosheets have a thickness of a few nano meters. According to X-ray diffraction (XRD) analysis, the exfoliated lanthanium titanate was found to be transformed into $Bi_{4-x}La_xTi_3O_{12}$ (x~2) after restacking with BiOCl and subsequent thermal treatment at > $700^{\circ}C$.

뫼스바우어 분광법과 색도 분석에 의한 고대 고려청자의 발색메카니즘 연구

전아영,노형구,김응수,조우석,김경자,김종영,김진모,김철성,강경인,Jeon, A-Young,No, Hyung-Goo,Kim, Ung-Soo,Cho, Woo-Seok,Kim, Kyung-Ja,Kim, Jong-Young,Kim, Chin-Mo,Kim, Chul-Sung,Kang, Gyung-In 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.1

In ancient Goryeo celadon, the effect of the chemical composition and ionic state of Fe on the color was evaluated by Mossbauer spectroscopy and Design of Experiment (DOE) analysis. The ancient celadon pieces excavated from the kiln sites in GangJin and Buan areas were analyzed by Mssbauer spectroscopy, chromaticity, and DOE analysis. The color of celadon was found to be mainly determined by that of glaze since variations of $L^*$, $a^*$, and $b^*$ values for the body were much smaller than those for the glaze. As $Fe^{2+}$/$Fe^{3+}$ in glaze increases, $L^*$ value increases, whereas $a^*$/$b^*$ value decreases, which is well consistent with the result on the synthetic glaze. As the amount of titanium increases in the glaze, the $a^*$ and $b^*$ values decrease; on the other hand, the $L^*$ value increases, which is well consistent with the result on the synthetic glaze.

문제중심학습(PBL)에 기초한 유아 인권교육 프로그램 개발 및 효과

전아영(Jeon, A-Young),최미숙(Choi, Mi-Sook) 한국열린유아교육학회 2018 열린유아교육연구 Vol.23 No.4

본 연구는 문제중심학습에 기초한 유아 인권교육 프로그램을 개발하고 그 효과를 검증하는 데 목적이 있다. 이를 위해 문제중심학습과 인권교육에 대한 문헌고찰 및 선행연구 분석을 토대로 문제중심학습에 기초한 유아 인권교육 프로그램의 목적 및 목표를 설정하고 교육 내용을 구성하였다. 교수·학습 방법으로 교수·학습원리, 교수·학습 단계를 구성하였으며 프로그램의 평가 방법을 선정한 후, 현장 적합성에 대한 검토 및 수정·보완을 거쳐 최종 프로그램을 개발하였다. 구성된 프로그램은 만 5세 유아에게 8주간 총 24차시를 적용하였으며, 유아 인권관련태도 검사, 인권행동 검사를 통하여 프로그램의 효과를 검증하였다. 그 결과 본 연구에서 개발한 문제중심학습에 기초한 유아 인권교육 프로그램이 유아의 인권관련 태도, 인권행동 향상에 효과적임을 알 수 있었다. 이에 본 연구에서 개발한 문제중심학습에 기초한 유아 인권교육 프로그램은 유아교육현장에서 유아의 인권 옹호적 태도 및 실천을 돕는 교육활동으로 활용될 수 있는 이론적 근거와 시사점을 제공한다. The present study aims to develop a human rights education program for young children based on problem-based learning and to verify its effectiveness. For this, the study established the purposes and objectives of the human rights education program for young children and the educational contents with the ground on problem-based learning based on the analysis of literature and precedent research. Teaching-learning principles and teaching-learning stages were constructed by teaching-learning methods, and after selecting program evaluation methods, the final program was developed through review, correction, and supplementation for the field suitability. The comprised program was applied to children at the age of 5 for 8 weeks for the total of 24 times, and the effectiveness of the program was verified through the evaluation of children"s human rights-related attitude and behavior. As a result, it was found that the human rights education program for young children based on problem-based learning developed in this study was effective in improving children"s human rights-related attitude and behavior. Thus, the human rights education program for young children based on problem-based learning developed in this study provide the theoretical grounds and implications that can be used as educational activities to support children"s human rights advocating attitude and practice in the field of early childhood education.

가속도 및 각속도 신호를 이용한 낙상 인지 시스템 구현

박근철 ( Geun Chul Park ),전아영 ( A Young Jeon ),이상훈 ( Sang Hoon Lee ),손정만 ( Jung Man Son ),김명철 ( Myoung Chul Kim ),전계록 ( Gye Rok Jeon ) 한국센서학회 2013 센서학회지 Vol.22 No.1

In this study, we developed a falling recognition system to transmit SMS data through CDMA communication using a three axises acceleration sensor and a two axises gyro sensor. 5 healthy men were selected into a control group, and the fall recognition system using the three axises acceleration sensor and the two axises gyro sensor was devised to conduct an experiment. The system was attached to the upper of their sternum. According to the experiment protocol, the experiment was carried out 3 times repeatedly divided into 3 specific protocols: falling during gait, falling in stopped state, and falling in everyday life. Data obtained in the falling recognition system and LabVIEW 8.5 were used to decide if falling corresponds to that regulated in an analysis program applying an algorithm proposed in this study. In addition, results from falling recognition were transmitted to designated cellular phone in a SMS (Shot Message Service) form. These research results show that an erroneous detection rate of falling reached 19% in applying an acceleration signal only; 6% in applying an angular velocity; and 2% in applying a proposed algorithm. Such finding suggests that an erroneous detection rate of falling is improved when the proposed algorithm is applied incorporated with acceleration and angular velocity. In this study therefore, we proposed that a falling recognition system implemented in this study can make a contribution to the recognition of falling of the aged or the disabled.

골프 운동이 중년여성들의 외적스트레스요인과 대사증후군인자에 미치는 영향

전아영(Jeon, A-Young),서영환(Seo, Young-Hwan) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.2

Due to the lack of physical activity of middle-aged women in recent years, stress at home and at work has led to diseases such as obesity and metabolic syndrome. In order to prevent these diseases in advance, golf exercise was carried out to middle-aged women. The change of α-amylase after golf exercise was decreased after the golf exercise, and the interaction effect was shown only between the measurement time*groups. In the factors related to metabolic syndrome after golf exercise, waist circumference was decreased after the golf exercise, and there was an interaction effect only between the measurement time and the group. HDL-C showed increased results before and after golf exercise, and there was an interaction effect between measurement time and measurement time*group. TG decreased after the golf exercise, and there was an interaction effect between the measurement time and the measurement time*group. Fasting blood glucose was decreased after the golf exercise, and there was an interaction effect between the measurement time and the measurement time*group. Systolic blood pressure was decreased after the golf exercise, and there was only an interaction effect between the measurement time groups. Diastolic blood pressure was found to have an interactive effect only at the time of measurement before and after golfing. Taken together, golf exercise has been shown to be effective in reducing stress-induced metabolic syndrome in middle-aged women.

복합운동이 아마추어 골퍼들의 체력과 드라이버 샷 비거리에 미치는 효과

전아영(A-Young Jeon),서영환(Young-Hwan Seo) 한국발육발달학회 2017 한국발육발달학회지 Vol.25 No.1

The purpose of this study was to investigate the effects of combined exercise on driver shot distance and physical fitness in amateur golfers (n = 15). Total 8 weeks of combined exercise (treadmill exercise + core exercise) was performed, and driver shots and physical fitness were measured before and after exercise. The statistical analysis was based on the results obtained by applying the corresponding sample t-test to the pre and post-test differences in the group. First, the distance of the driver shots of the exercise group with combined movement was measured before and after the experiment, and the distance of the amateur golfers was improved and statistically significant difference was shown (p<.001). Second, there was a statistically significant difference in strength, muscle endurance, cardiovascular endurance, flexibility, and empowerment (p<.05, p<.01, p<.001). This result is an effective exercise for amateur golfers because of the improvement of physical fitness and the increase of distance. Therefore, it is recommended that amateur golfers improve their physical fitness and distance by multiplying their movements. In addition, if future studies are conducted by combining motion analysis using video equipment and studies on active oxygen for condition control, It is thought that amateur golfers will be able to present an effective exercise program.

XAI 를 활용한 적대적 공격 탐지 연구 동향 분석

전아영 ( A-young Jeon ),이연지 ( Yeon-ji Lee ),이일구 ( Il-gu Lee ) 한국정보처리학회 2024 한국정보처리학회 학술대회논문집 Vol.31 No.1

유아의 관계적‧외현적 공격성의 성차 및 성격과 리더십의 영향

최미숙(Mi Sook Choi),전아영(A Young Jeon) 한국영유아교원교육학회 2016 유아교육학논집 Vol.20 No.2

본 연구는 유아의 관계적 공격성 및 외현적 공격성의 성차와 이에 대한 성격과 리더십의 영향을 살펴보고자 하였다. 연구대상은 K시 사립유치원 4곳의 만 5세 유아 166명을 대상으로 실시하였다. 수집된 자료는 SPSS WIN 18.0을 이용하여 t-검증, Pearson 적률상관계수, 단계적 회귀분석을 실시하였다. 그 결과 첫째, 관계적 공격성 및 외현적 공격성의 성차는 외현적 공격성에서 남아가 더 높은 것으로 나타났다. 둘째, 관계적 공격성 및 외현적 공격성은 성격과 의미 있는 상관관계를 보였으며 성격의 정서적 안정성, 호감성, 외향성, 성실성은 관계적 공격성을, 호감성, 개방성, 정서적 안정성은 외현적 공격성을 설명하는데 중요한 예측변인으로 나타났다. 셋째, 관계적 공격성 및 외현적 공격성은 유아의 리더십과 의미 있는 상관관계를 보였으며 리더십 중 타인존중, 도전과 자신감은 관계적 공격성과 외현적 공격성을 설명하는데 중요한 예측변인으로 나타났다. The purpose of this study was to investigate young children’s gender differences in relational and overt aggression, and the impacts of personality and leadership on the aggressions. The subjects were 166 5-year-old children at four private kindergartens in K city. For data analysis, t-test, Pearson’s correlation coefficient, and stepwise regression analysis were conducted using the SPSS 18.0 WIN program. The results of the present study are summarized as follows. First, regarding gender differences in relational aggression and overt aggression, boys showed higher levels of overt aggression. Second, relational aggression and overt aggression showed a significant correlation with personality. In particular, emotional stability, agreeableness, extroversion, and sincerity among personality traits were important variables to predict relational aggression, whereas agreeableness, openness, and emotional stability were important variables to predict overt aggression. Third, relational and overt aggression showed a significant correlation with young children’s leadership. In particular, respect for others, challenge and self-confidence were important variables to predict relational aggression and overt aggression.

가미영신환의 현미감정 연구

황명석,전아영,박종희,Whang, Myumg-Suk,Jeon, A-Young,Park, Jong-Hee 한국생약학회 2000 생약학회지 Vol.31 No.1

'Ga Mi Yung Sin Whan' is a Chinese patent medicine, which is used for a tachycardia, anemia, amnesia, ecstacy, and so on in Korea. This medicine consists of 12 kinds of powdered crude drugs. For the identification of individual ingredients in such powdery mixtures, microscopic method may advantageously be used as it requires only a small amount of specimens. In this paper, the effectiveness of this method is exemplified by the identification of the ingredients in Ga Mi Yeong Sin Whan which contains 12 powdered crude drug ingredients.

청자 유약 발색메카니즘에 대한 뫼스바우어 분광법에 의한 연구

김종영,노형구,전아영,김응수,조우석,김경자,김진모,김철성,Kim, Jong-Young,No, Hyung-Goo,Jeon, A-Young,Kim, Ung-Soo,Cho, Woo-Seok,Kim, Kyung-Ja,Kim, Chin-Mo,Kim, Chul-Sung 한국세라믹학회 2011 한국세라믹학회지 Vol.48 No.1

Systematic study on relationship between celadon coloring and glaze component was conducted by chromaticity analysis and M$\ddot{o}$ssbauer spectroscopic analysis. The chromaticity ($L^*$, $a^*$, $b^*$ values) and M$\ddot{o}$ssbauer analysis results were correlated to the amount of $Fe_2O_3$, $TiO_2$, MnO, and $P_2O_5$, which are the essential factors influencing celadon coloring. According to chromaticity analysis, celadon glaze color belongs to GY group when the addition of $TiO_2$ was 1.4%, whereas the color belongs to BG group when the addition of $TiO_2$ was 0.1%. For the GY group, the colors change from GY to YR with the decrease of brightness as the addition of $TiO_2$, MnO, and $P_2O_5$ increases. According to M$\ddot{o}$ssbauer analysis results, as the amount of divalent iron ion increases, the $a^*$ and $b^*$ values decrease, on the other hand, $L^*$ value increases. The ratio of divalent iron ion produced in reductive sintering process is found to be 80~95% in this study, which induces the increase of $L^*$ values in celadon glaze.