피콜리닉산 리간드를 갖는 염료감응형 태양전지용 루테늄 염료 합성과 특성분석

정혜인,안병관,Jung, Hye-In,An, Byeong-Kwan 한국전기전자재료학회 2016 전기전자재료학회논문지 Vol.29 No.3

A novel heteroleptic ruthenium(II) complex bearing a 4-picolinic acid unit as anchoring ligands (trans-dithiocyanato bis(4-picolinic acid)ruthenium(II) (trans-H1)) was synthesized and its chemical structure was identified by $^1H$-NMR, FT-IR and mass spectroscopy. The optical, thermal, electrochemical and dye adsorption properties of trans-H1 dye were investigated and compared with those of the gold standard ruthenium complex, Ru(4,4'-dicarboxy-2,2'-bipyridine)$_2cis(NCS)_2$ (N3). DSSCs based on trans-H1 dyes were examined under the illumination of AM 1.5 G, $100mWcm^{-2}$ and exhibited typical photovoltaic properties with an open-circuit voltage ($V_{OC}$) of 0.46 V, a short-circuit current ($J_{SC}$) of $4.10mA{\cdot}cm^{-2}$, a fill factor (FF) of 60.4%, and a conversion efficiency (PCE) of 1.14%.

플루오란 로이코 염료를 이용한 염료감응형 태양전지

정혜인,안병관,Jung, Hye-In,An, Byeong-Kwan 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.3

The utilization of a fluoran leuco sensitizer, 2-anilino-6-dibutyl amino-3-methylfluoran (ODB-2), for dye-sensitized solar cells (DSSCs) was investigated through the examination of the adsorption of ODB-2 molecules onto the surfaces of porous titanium dioxide (titania, $TiO_2$) films and the photovoltaic properties of ODB-2-based DSSCs. Despite of the absence of the specific anchoring groups with titania, ODB-2 dye molecules were spontaneously adsorbed onto the titania surfaces because the lactone ring in ODB-2 was opened and changed into the carboxylic acid (-COOH) by releasing protons from the surfaces ($TiOH_2{^+}$) of titania, which consequently leads to the chemisorption reaction of ODB-2 molecules to the active sites of titania. DSSCs based on ODB-2 exhibited typical photovoltaic properties with an open-circuit voltage ($V_{OC}$) of 0.19 V, a short-circuit current ($J_{SC}$) of $0.30\;mA{\cdot}cm^{-2}$, a fill factor (FF) of 37%, and a conversion efficiency (PCE) of 0.02%.

3 자유도 비행체 시스템의 이벤트 트리거 기반의 H₂ 자세 제어기 설계

정혜인,한승용,이상문,Jung, Hyein,Han, Seungyong,Lee, Sangmoon 대한임베디드공학회 2020 대한임베디드공학회논문지 Vol.15 No.3

This paper is concerned with the H₂ attitude controller design for 3 degree of freedom (DOF) Hover systems with an event-triggered mechanism. The 3 DOF Hover system is an embedded platform for unmanned aerial vehicle (UAV) provided by Quanser. The mathematical model of this system is obtained by a linearization around operating points and it is represented as a linear parameter-varying (LPV) model. To save communication network resources, the event-triggered mechanism (ETM) is considered and the performance of the system is guaranteed by the H₂ controller. The stabilization condition is obtained by using Lyapunov-Krasovskii functionals (LKFs) and some useful lemmas. The effectiveness of the proposed method is shown by simulation and experimental results.

광경화성 알파-메톡시아크릴레이트 단량체의 경화특성에 관한 연구

정혜인(Hyein Jung),서해민(Haemin Seo),연애진(Aejin Yeon),이미혜(Mi Hye Yi),김은경(Eunkyoung Kim),가재원(Jae-Won Ka) 한국고분자학회 2018 폴리머 Vol.42 No.3

광가교형 시스템에 많이 사용되는 아크릴레이트 또는 메타아크릴레이트(MA)는 일반적인 광조사 파장인 365 nm 자외선 영역에서의 낮은 광반응성으로 인해 광개시제 혹은 높은 에너지 조사가 필요하였다. 아크릴레이트의 365 nm에서의 반응성을 증가시키기 위해 분자설계를 통한 이중결합의 HOMO 에너지가 조절된 알파-메톡시아크릴레이트(aMA)를 합성하였다. 새로이 합성한 aMA의 광반응성을 조사하기 위해 일정량의 UV 조사후 FTIR 스펙트럼 변화를 관찰하였으며, 알킬기로만 이루어진 1,6-헥산다이올(Hx)을 이용하여 에스테르화 반응을 통해 화합물 HxaMA와 비교군으로서 Hx-MA를 합성하였다. 합성한 화합물에 0에서 50 J/cmc² 365 nm 자외선을 조사한 후 FTIR 스펙트럼의 변화로부터 전환율을 계산하였고, 이로부터 aMA 가교기의 광반응성이 MA에 비해 약 3배 높음을 확인하였다. 높은 광반응성의 aMA RM(reactive mesogen)은 광개시제 사용이 제한되는 바이오 응용, 디스플레이 또는 광학부품용 소재로 응용이 가능하다. The acrylate or methacrylate (MA) group which is often used in photo-crosslinking systems requires high energy or photoinitiator because of its low photoreactivity under 365 nm. In order to increase the photoreactivity of acrylate group at 365 nm, we designed and synthesized the α-methoxyacrylate (aMA) with controlled HOMO energy level of double bond. The compounds (Hx-aMA and Hx-MA) were synthesized from 1,6-hexandiol (Hx) via esterification reaction. The degree of conversion of the synthesized compounds were calculate from the FTIR spectral change after UV irradiation of 0 to 50 J/cm² at 365 nm. The photoreactivity of aMA crosslinker was about 3 times higher than that of MA. A high photoreactive aMA RM (reactive mesogen) can be utilize to bio-applications, display or optical component applications where the use of photoinitiators are limited.

부산지역 치과환경에서 분리된 coagulase-negative staphylococci의 특성

정혜인(Hye-In Jung),정소영(So Young Jung),박인달(Indal Park),배일권(Il Kwon Bae) 한국생명과학회 2016 생명과학회지 Vol.26 No.2

본 연구는 치과 병의원 진료실 주변환경과 치과종사자의 휴대전화에서 분리된 coagulase-negative staphylococci(CNS)의 분리율과 항균제 내성양상 및 분자 역학적 특성을 분석하고자 하였다. 2014년 12월부터 2015년 1월까지 부산지역 10개의 치과 병의원에서 총 154개의 샘플을 수집하여 MALDI-TOF분석법을 통해 동정하였다. 항균제 감수성검사는 디스크 확산법을 시행하였고 mupA, mecA 유전자 보유현황 및 SCCmec type은 PCR과 염기서열분석에 의해 결정하였다. 154개의 샘플 중 10개(6.5%)에서 CNS 균주(Staphylococcus epidermidis 5주, Staphylococcus capitis 2주, Staphylococcus warneri 2주, Staphylococcus haemolyticus 1주) 가 분리되었다. 항균제 감수성검사에서 penicillin 10주, mupirocin 6주, gentamicin 5주, tetracycline 3주 및 cefoxitin과 erythromycin 2주가 내성이었고 clindamycin, ciprofloxacin, teicoplanin, trimethoprim-sulfamethoxazole에 내성인 세균은 없었다. 2개의 CNS균주(S. warneri, S. haemlyticus)에서 mecA 유전자가 검출되었고 1개의 CNS균주(S. epidermidis)에서 mupA가 확인되었다. Methicillin 내성 CNS균주 가운데 1주는 SCCmec I형이었고 1균주는 SCCmec의 유전형이 구분되지 않았다. 본 연구를 통하여 다약제 내성을 보이는 CNS균주가 더 이상 우리나라 치과병의원 환경에서 드물지 않음을 알 수 있었다. Coagulase-negative staphylococci (CNS) have recently become the bacteria most frequently found in clinical infections. The aim of this study was to investigate the prevalence, antimicrobial susceptibilities, and molecular characteristics of CNS isolates from dental clinic environments in Busan, Korea. One hundred and fifty-four samples were collected from 10 dental clinics and dental hospitals in Busan from December 2014 to January 2015. Species were identified by matrix-assisted laser desorption/ionization–time-of-flight. Antimicrobial susceptibility was determined by disk diffusion methods. A polymerase chain reaction was performed to detect mecA, mupA gene, and SCCmec types. Of the 154 samples, 10(6.5%) isolates were identified as CNS (5 Staphylococcus epidermidis, 2 Staphylococcus capitis, 2 Staphylococcus, and 1 Staphylococcus haemolyticus). Among the 10 isolates, 6 were resistant to penicillin, 5 were resistant to gentamicin, 3 were resistant to tetracycline, and 2 were resistant to cefoxitin and erythromycin. However, clindamycin, ciprofloxacin, teicoplanin, and trimethoprim-sulfamethoxazole resistant isolates were not present. Genes encoding mecA were detected in 4 (2 S. warneri and 2 S. haemolyticus) isolates, and mupA in 1 (S. epidermidis) isolate. One methicillin-resistant CNS (S. warneri) isolate was determined as being of the SCCmec type I. It is concluded that CNS resistant to various antimicrobial agents was widely distributed in dental clinic environments in Korea.

혐기성소화조의 모니터링을 위한 센서의 TimeGAN 모델 기반 고장진단

정혜인 ( Hyein Jung ),우정희 ( Junghui Woo ),송영채 ( Young Chae Song ) 한국폐기물자원순환학회 2024 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2024 No.0

디자인씽킹을 적용한 성폭력예방 기능성 게임

정혜인(Hea-In Jung),양용철(Yong-Chil Yang) 한국디지털콘텐츠학회 2017 한국디지털콘텐츠학회논문지 Vol.18 No.2

화훼장식의 프레임에 관한 연구 - 프레임의 기본형태 및 표현기법을 중심으로 -

정혜인 ( Haw In Jung ) 한국화예디자인학회 2005 한국화예디자인학 연구 Vol.13 No.-

아동의 학교적응성 탐색을 위한 자아탄력성척도 개발

정혜인 ( Hea In Jung ) 한국초등교육학회 2010 초등교육연구 Vol.23 No.2

This study tries to develop a self-resilience scale, a personality characteristic factor pertaining to adjustment of elementary school children. It refers to an ability to adapt to variable environment and probable situation which consists of displaying affirmativeness and adaptability in recognitive, interpersonal, and individual sphere. The development of this scale was specifically pointed to the development of a scale for self-resilience in searching school adjustment of school-aged children. To begin the study, by surveying and organizing relevant documents, four factors; self-recovery, interpersonal relationship, perceptibility, and stress management was drawn on the basis of internal characteristics and external environmental factors. An expert group selected thirty-five preliminary questions for both lower graders and higher graders and conducted a preliminary test on the grounds of the four factors. Twenty four questions were selected and modified after the review of the expert group, and twenty four questions appeared to be effective after conducting second preliminary test and question analysis. The reliability of the overall questions were Cronbach a= .913 and the reliability of the four factors ranged from .955 to .749, indicating correlation between the factors. Twenty four questions were confirmed through factor analysis. The significance and limitation of the results of this study and proposal for further studies were presented.

생쥐 배아 혀 상피의 발생과정에서 나타나는 사이토케라틴 1, 14와 PAX 9에 관한 면역조직화학적 연구

정혜인(Hye-In Jung),진명욱(Myoung-Uk Jin),조제열(Je-Yoel Cho),정한성(Han-Sung Jung),김재영(Jae-Young Kim) 대한체질인류학회 2008 대한체질인류학회지 Vol.21 No.4

피부의 상피에 대한 연구는 부속기관의 발생 그리고 보호장벽 형성과 같은 다양한 분야에서 연구되어 왔다. 혀 상피조직의 발생과 관련된 보호장벽의 형성 및 상피조직 분화에 대해서는 많은 연구가 필요한 실정이다. 본 연구에서는 혀의 보호장벽이 형성되고 상피의 분화가 일어나는 발생중인 혀를 이용하여 보호장벽 형성과정을 면밀하게 관찰하였고, 피부의 상피에서 나타나는 다양한 사이토케라틴의 발현양상을 발생중인 혀에서 조직면역화학방법으로 확인하였다. 혀 상피의 발생과정에서 PAX 9의 발현이 사이토케라틴 14와 겹쳐서 나타나는 것을 확인할 수 있었으며, 또한 Ki67을 이용한 상피세포의 증식양상과 비교해 볼 때, 유사하게 나타나는 것을 확인할 수 있었는데 이는 PAX 9, 사이토케라틴 14와 세포의 증식이 혀 보호장벽 형성에 관여하는 중요한 인자로 작용할 수 있을 것이라고 생각된다. 이러한 다양한 상피분화관련 인자들의 발현양상들을 비교해 볼 때, 혀 상피의 분화는 E15에서 본격적으로 시작되어 보호장벽의 형성 이전에 사이토케라틴 14와 PAX 9과 같은 인자들의 발현이 먼저 나타나게 되면서 상피의 분화가 진행되고, 이후 사이토케라턴 1과 같은 각질화 관련 인자가 보호장벽 형성에 기여한다고 생각된다. Epithelial differentiation and morphogenesis in skin and oral mucosa were elucidated using various experimental tools. However, tongue epithelial differentiation has not been examined properly yet. In this study, we identified the relationship between morphological changes and localizations of differentiation markers, such as cytokeratins and PAX 9 in mice embryonic tongue development. Protective barrier formation and localization pattern of cytokeratins in tongue epithelium were examined with toluidine blue staining and immunohistochemistry respectively. Localization patterns of PAX 9 and Cytokeratin 14 were coincided during tongue epithelium development. In addition, compared with Ki67 localizations , marker for cell proliferation, localization patterns of PAX 9 and Cytokeratin 14 would suggest that these factors would involve in tongue barrier formation through cell proliferation. Based on these results, tongue epithelial differentiation would begin at E14 with the specific localizations of PAX 9 and Cytokeratin 14 prior to protective barrier formation then Cytokeratin 1, keratinization marker, would involve in protective barrier and filiform papillae formations.