양극산화법에 의한 니오븀 산화물 나노로드 제조

정은혜,장정호,정봉용,Jung, Eun-Hye,Chang, Jeong-Ho,Jeong, Bong-Yong 한국전기화학회 2011 한국전기화학회지 Vol.14 No.4

본 연구에서는 니오븀 산화물을 비교적 저온에서 단시간 동안의 양극산화법을 통해 제조하였다. 이때, 전해질로는 NaF와 HF를 혼합하여 사용하였으며, 20~120 V의 다양한 전압 조건에 따라 생성되는 니오븀 산화물의 미세구조를 관찰하였다. 일반적으로 니오븀 금속의 양극산화 시 초기에 생성된 니오븀 산화물은 무정형 구조이나 반응이 경과함에 따라 점차 결정형 산화물로 성장하게 된다. 이러한 산화물은 XRD 분석을 통하여 결정형의 $Nb_2O_5$ 임을 확인하였고, FE-SEM 분석결과, 그 표면은 매우 밀집된 형태의 나노로드로 이루어진 마이크로콘 산화물임을 알 수 있었다. 적절한 공정변수로 제조된 니오븀 산화물은 마이크로콘 구조 전체 표면에 걸쳐 동일한 크기를 갖는 나노로드 다발을 형성하고 있으며, 이러한 나노 구조는 또한 넓은 표면적을 기대할 수 있어 염료감응 태양전지나 바이오 소재 등에 대한 다양한 분야에 응용될 수 있을 것으로 기대된다. The formation of niobium oxide microcones on niobium substrates was investigated in NaF to the HF electrolytes. This condition builds on the uniqueness of the microstructures niobium oxide. The dimensions and integrity of the bulk microstructures were found to be strongly dependent on potential, temperature, electrolyte composition, and anodization time. The anodic oxide was initially amorphous at all temperatures, but crystalline oxide nucleated during anodization. From XRD patterns of the anodized specimens, the microcones consisted of crystalline $Nb_2O_5$. We demonstrated niobium oxide microcone structures with nanorods. The anodized niobium oxide microcone texture revealed nanorod bundles. The surface of $Nb_2O_5$ microcones is very regular and has a nano-scale. The surface morphologies of the nanorods were examined using FE-SEM. EDS analyses show that the anodically prepared niobium oxide consists of $Nb_2O_5$. The aim of this study is to find the condition of forming the favorable nanorods by anodization method.

아파트 외부공간의 감성적 요소가 주거소비행태에 미치는 영향에 관한 연구

정은혜,정준현,Jung, Eun-Hye,Jeong, Jun-Hyun 한국주거학회 2011 한국주거학회 논문집 Vol.22 No.3

The purpose of the research is analyzing how the emotional factors of the external apartment design can be influenced by the consumers' emotional reaction, and analyzing how the emotional reaction of the consumers will affect the expenditure of the apartment in the upcoming future. For this purpose, first, external surrounding factors of the apartment are extracted and then classified into three major design categories (instinctive, behavioral, and reflective design), and each factor is evaluated by the emotional evaluation. The scope of the research is restricted to the apartments in Daegu city which are built by Top 3 construction companies from the analysis of construction-working rank (May, 2010). The residential-expenditure data are extracted from D-univ. students, in accordance with the satisfaction of the external surroundings and emotional-reaction against the emotional-design factors of the apartment. This research is done by the statistic analysis program SPSS17.0. This shows that difference of emotional design by the apartment external space requisites will be significance as fundamental data for development of application and planning and apartment external space of emotional design by the apartment external space in the future.

영지(靈芝) 추출물이 Rat fetus 두개골로부터 분리한조골세포에 미치는 영향

정은혜 ( Eun Hye Jung ),유동열 ( Dong Youl Yoo ) 대한한방부인과학회 2014 大韓韓方婦人科學會誌 Vol.27 No.2

In this study, the author aimed to evaluate the effect of EtOH extractof Ganoderma lucidum (GLE) on osteoblast proliferation in rat fetus calvarial cells. Methods: The osteoblast separated from rat fetus calvariae was cultivated for6~21 days and evaluated the cell function. After the addition of GLE on the culturemedium, we determined the effect of GLE on the cell viability, cell proliferation,bone matrix protein synthesis, alkaline phosphatase (ALP) activity, collagen synthesisand calcified nodule formation of the cultivated osteoblast. Results: GLE did not change the survival rate of rat calvarial osteoblast. GLEincreased the proliferation of rat calvarial osteoblast. GLE increased ALP activityof rat calvarial osteoblast. GLE increased bone matrix protein synthesis of ratcalvarial osteoblast. GLE increased collagen synthesis of rat calvarial osteoblast. GLE slightly affected calcified nodule formation of rat calvarial osteoblast. Conclusions: This study suggests that Ganoderma lucidum might improve theosteoporosis resulted from augmentation of osteoblast proliferation.

AMPK 활성화를 통한 목통의 항산화 효과

정은혜(Eun Hye Jung),김상찬(Sang Chan Kim),조일제(Il Je Cho),김영우(Young Woo Kim) 한의병리학회 2015 동의생리병리학회지 Vol.29 No.1

부모양육태도, 교사애착, 학업열의, 학업무기력의 관계에서 자아존중감의 매개효과 : 중학생의 학년 변화에 따른 차이를 중심으로

정은혜(Jung, Eun-Hye),김현주(Kim, Hyun-Joo),손은령(Son, Eun-Young) 학습자중심교과교육학회 2021 학습자중심교과교육연구 Vol.21 No.18

목적 본 연구에서는 중학생의 학업열의와 학업무기력에 대해 학년 진급에 따른 변화를 확인하고, 부모양육태도, 교사애착, 학업열의 및 학업무기력의 관계에서 자아존중감의 매개효과를 검증하고자 하였다. 방법 이를 위해 한국아동⋅청소년패널 조사 중1 패널의 중학교 1학년(1차년도, 2018), 2학년(2차년도, 2019) 종단자료를 활용하였으며, 중학생 2,438명을 대상으로 하였다. t-검정을 통해 학년 및 성별에 따른 차이를 확인하였고 구조방정식 모형 분석을 통해 변인들 간의 구조적 관계 및 매개효과를 검정하였다. 결과 첫째, 학업열의는 1차년도와 2차년도에 유의한 차이가 없었으나, 하위요인 중 헌신과 효능감이 1차년도에 비해 2차년도에 낮았고, 활기와 학업무기력은 1차년도에 비해 2차년도에 높은 것으로 나타났다. 또한, 남학생의 경우 학업열의가 1차년도에 비해 2차년도에 유의하게 낮게 나타난 반면, 여학생은 1차년도에 비해 2차년도에 학업열의가 높게 나타났다. 한편, 학업무기력은 남⋅여 학생 모두 1차년도에 비해 2차년도에 유의하게 높게 나타났다. 둘째, 1차년도에 남학생이 여학생에 비해 학업열의가 높았으며, 학업무기력에서는 성별에 따른 유의한 차이가 없었다. 셋째, 부모양육태도는 자아존중감을 완전매개하여 학업열의에 영향을 미쳤으며, 자아존중감을 부분매개하여 학업무기력에 영향을 미치는 것으로 나타났다. 또한, 교사애착은 자아존중감을 부분매개하여 학업열의 및 학업무기력에 영향을 미치는 것으로 나타났다. 결론 이러한 연구결과는 중학교 1학년에서 2학년으로 성장하는 시기에 학업무기력이 높아지는 문제에 대한 사회적 관심과 적절한 개입의 필요성을 시사하며, 학업열의를 높이고 학업무기력을 낮추기 위해 부모의 긍정적 양육태도 및 교사와의 애착, 건강한 자아존중감의 중요성을 시사한다. Objectives The purpose of this study was to investigate the changes in the academic engagement and academic helplessness of middle school students, and to verify the structural relationship among parenting attitude, self-esteem, teacher attachment, academic engagement and academic helplessness. Methods For this purpose, the longitudinal data of the 1st year of middle school(1st year, 2018) and 2nd year(2nd year, 2019) of the 1st panel of the Korean Children s and Youth Panel survey were used. The t-test and structural equation analysis were performed on 2,438 middle school students. Results There was no significant difference in the academic engagement of middle school students between the 1st and 2nd years. However, the academic helplessness increased in the second year. Second, male students had higher academic engagement than female students, and there was no significant difference in academic helplessness. Third, it was found that parenting attitude completely mediated self-esteem and influenced academic engagement, and it was found that it affected academic helplessness by partially mediating self-esteem. Also, teacher attachment was found to have an effect on academic engagement and academic helplessness by partially mediating self-esteem. Conclusions Based on this result, implications of this study and suggestions were disscussed.

양생조건에 따른 압축성형콘크리트 패널의 휨강도 특성

정은혜(Jung, Eun-Hye),최훈국(Choi, Hun-Gug),김재원(Kim, Jae-Won),서정필(Seo, Jung-Pil),박선규(Park, Sun-Gyu),김진만(Kim, Jin-Man) 한국콘크리트학회 2006 한국콘크리트학회 학술대회 논문집 Vol.2006 No.11

발달장애인의 지역사회생활에 관한 주민의 태도에 영향을 미치는 요인 -직접접촉경험 여부에 따른 비교-

정은혜 ( Jung Eun Hye ),김보람 ( Kim Bo Ram ),송정원 ( Song Jeong Won ) 한국가족사회복지학회 2021 한국가족복지학 Vol.68 No.2

본 연구는 발달장애인의 지역사회생활에 관한 주민의 태도에 영향을 미치는 요인으로 가족 및 대인관계를 포함하는 관계요인, 타 장애유형의 지역사회 내 배타수준을 확인한 배타성요인, 직접 및 간접 접촉경험을 파악한 접촉요인을 함께 고려하여 살펴보고 이에 영향을 미치는 요인을 다차원적 측면에서 검토하고자 하였다. 이에 20세 이상 주민을 대상으로 설문조사를 실시하였으며, 최종수집된 자료 총 519부를 분석하였다. 연구에서 태도는 ‘권한부여’, ‘배제’, ‘유사성’의 세 개의 하위요인을 구분하여 분석하였으며, 그 결과 첫째, 발달장애인 지역사회생활에 관한 주민의 태도 수준은 중간보다는 약간 긍정적이지만, 크게 긍정적이지 않은 것으로 확인되었다. 둘째, 가족 및 대인관계는 발달장애인의 지역사회생활에 관한 태도에 영향을 미치는 요인으로 확인되었다. 셋째, 다른 장애 중 신체(외부)장애에 대한 배타성은 발달장애인의 지역사회생활에 관한 태도의 모든 영역에서 부정적 영향을 미치는 것으로 나타났다. 넷째, 발달장애인의 간접접촉경험은 발달장애인 지역사회생활에 관한 태도에 모두 유의한 영향을 보였으며, 직접접촉경험 또한 통계적으로 유의한 수준에서 배제 태도를 감소시키고 유의성을 높이는 것으로 확인되었다. 다섯째, 직접접촉경험 여부에 따라 발달장애인의 지역사회생활에 관한 태도에 영향을 미치는 요인들의 차이를 살펴본 결과, 하위요인 모두에서 공통적으로 간접접촉경험의 영향력이 유의한 차이를 보이는 것으로 확인되었다. 이를 통해 발달장애인에 대한 지역 사회 주민들의 수용적인 태도를 이끌어내기 위한 사회복지적 함의를 제시하였다. This study investigated the factors that affect the community members’ attitudes toward the community living of people with developmental disabilities. Specifically, relationships involving family and interpersonal relationships, exclusivity referring to the extent to which other types of disabilities are excluded in the community, and contacts involving direct/indirect experience were examined as the factors that affect community members’ attitudes toward the community living of people with developmental disabilities in multidimensional aspects. To this end, community members aged 20 or older were surveyed. The analysis of the data collected from 519 copies highlighted the following findings. In this study, attitudes were analyzed in terms of three sub-factors: empowerment, exclusion, and similarity. The results are as follows. First, the community members’ attitudes toward the community living of people with developmental disabilities were slightly more positive than the median, but not very positive. Second, family and interpersonal relationships affected the community members’ attitudes toward the community living of people with developmental disabilities. Third, the exclusivity toward people with physical disabilities had negative effects on all areas of their attitudes. Fourth, the indirect contact with people with developmental disabilities exerted statistically significant effects on their attitudes, while the direct contact statistically significantly reduced their exclusion attitudes and increased the statistical significance. Fifth, as for the differences in the factors affecting the community members’ attitudes toward people with disabilities between those with and without direct contact experience, significant differences were found in the indirect contact experience across all sub-factors. These findings have implications for social welfare, conducive to eliciting the receptive attitudes toward people with developmental disabilities from community members.

RPE 13에서의 12분 걷기테스트를 이용한 적정 운동강도의 타당성

정은혜(Jung Eun-Hye),최현민(Choi Hyun-Min),김종경(Kim Jong-Kyung),노호성(Nho Ho-Sung) 한국체육과학회 2008 한국체육과학회지 Vol.17 No.1

The purpose of this study was to examine if a 12-min submaximal treadmill walk test corresponding to a rating of perceived exertion 13 (RPE13) was appropriate to determine exercise intensity. Twenty-seven subjects participated this study, aged from 22 to 26. VO2max, VO2AT and total distance were obtained from a graded exercise test (GXT). Also, VO2 and total distance were obtained during a 12-min submaximal treadmill walk test corresponding to RPE13. The results were obtained as follows: 1) The correlation coefficients between VO2 obtained during a 12-min submaximal treadmill walk test and VO2AT obtained during GXT were statistically significant (r=0.382). 2) The correlation coefficients between VO2 obtained during a 12-min submaximal treadmill walk test and VO2max obtained during GXT were statistically significant (r=0.434). 3) The correlation coefficients between total distance obtained during a 12-min submaximal treadmill walk test and V O2max, VO2AT obtained during GXT were statistically significant (r=0.721, 0.688). 4) The correlation coefficients between VO2 obtained during a 12-min submaximal treadmill walk test and VO2 obtained during RPE13 in GXT were statistically significant (r=0.526). These results suggest that a 12-min submaximal treadmill walk test corresponding to RPE13 is a valid for determining exercise intensity at AT level. Therefore, the 12-min submaximal treadmill walk test corresponding to RPE13 could be a useful for prescribing exercise intensity in the collegiate-student men.

TiNb 합금의 양극산화법에 의한 나노튜브 생성거동

정은혜 ( Eun Hye Jung ),정봉용 ( Bong Yong Jeong ) 대한금속재료학회(구 대한금속학회) 2013 대한금속·재료학회지 Vol.51 No.11

Titanium and titanium alloys have been used extensively as bone-implant materials due to their high strength-to-weight ratio, good biocompatibility and excellent corrosion resistance. In this work, we investigated the surface characteristics of nanotubes formed on Ti25Nb alloys in a 0.1M NaF aqueous electrolyte containing HF using electrochemical methods. The constant voltages were widely applied to a range from 20 to 80 V. As a result, the oxide layers formed with nanotube structures in which the nanotubes increased in a linear diameter and length. The TiNb nanotube morphology was strongly influenced by the fluoride concentration, applied potential and reaction time.

세피올라이트를 이용한 압출성형 콘크리트 패널의 휨강도 및 밀도 특성

정은혜(Jung, Eun-Hye),강철(Kang, Cheol),김재원(Kim, Jae-Won),이정구(Lee, Jung-Koo),최훈국(Choi, Hun-Gug),김진만(Kim, Jin-Man) 한국콘크리트학회 2006 한국콘크리트학회 학술대회 논문집 Vol.2006 No.5