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라디오주파수 분말 스퍼터링 방법으로 성장시킨 주석을 도핑한 산화아연 박막의 열처리
이하람 ( Haram Lee ),정병언 ( Byeong Eon Jeong ),양명훈 ( Myeong Hun Yang ),이종관 ( Jong Kwan Lee ),최영빈 ( Young Bin Choi ),강현철 ( Hyon Chol Kang ) 한국열처리공학회 2018 熱處理工學會誌 Vol.31 No.3
We report the post-annealing effect of Sn doped ZnO (ZnO:Sn) thin film grown on sapphire (001) sub-strate using radio-frequency powder sputtering method. During thermal annealing in a vacuum atmosphere, the ZnO:Sn thin film is transformed into a porous thin film. Based on X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray analyses, a possible mechanism for the production of pores is presented. Sn atoms segregate to form clusters that act as catalysts to dissociate Zn-O bonds. The Zn and O atoms subsequently vaporize, leading to the formation of pores in the ZnO:Sn thin film. We also found that Sn clusters were oxidized to form SnO or SnO<sub>2</sub> phases. (Received April 20, 2018; Revised April 27, 2018; Accepted May 4, 2018)
창의융합의 학습플랫폼 구조 연구 - 반성적 사고교육 기반 캡스톤 디자인 수업분석을 중심으로 -
양황규(Hwang-Kyu YANG),정하람(Haram JUNG) 한국수산해양교육학회 2021 水産海洋敎育硏究 Vol.33 No.1
The purpose of this study is to analyze the structure of creative fusion platform in the engineering. For this study, pieces of related literature were reviewed focusing on analyzing the structure of creative fusion learning platform through the analysis of thinking education-based Capstone design class operation. In addition, interviews with five professors in the field of engineering, aesthetics, and social science were analyzed. The key of analysis was the five phases of thinking education process used for Capstone design class. The findings of this study were as follows. Most of the professors recognized the importance of thinking education. However, it was found that the 5-phase thinking education process did not apply systematically to the operation of Capstone design class. Consequently, there was a discussion about the ways to operate Capstone design class in order to improve the class quality through experience-based thinking education instead of simply focusing on outcome-oriented creative learning experience, as well as about valuable outcome expectations for creative products. In addition, based on the study findings, the structure of creative fusion learning platform was proposed as basic structure, process structure, and outcome structure.
김민지(Min Ji Kim),양하람(Haram Yang ),박연주(Yeonju Park),연제연(Je Yeon Yeon),김완순(Wan Soon Kim) 한국원예학회 2021 한국원예학회 학술발표요지 Vol.2021 No.10
대표적 반음지 식물인 좀비비추(Hosta minor)는 한국 특산종으로 내음성이 강해 정원식물로 국제적 선호도가 높고 오염지에 대한 환경 복원 식물로 제안되어 미래가치가 크다. 본 실험은 실내 식물 활용성 평가를 위해 2021년 8~9월 두 달간 실내 광도에 따른 좀비비추의 생장 반응을 조사했다. 재배 환경 중 광도는 10μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> (L10), 30μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> (L30), 50μmol·m-2·s-1(L50), 광주기 16시간(백색 LED 광원), 온도 24 ± 3°C, 상대습도 43 ± 5%로 설정했다. 실내재배 키트(센스맘LED식물재배기, 셀프닥터의료기, Korea)를 이용하여 재배했고 겉흙이 마르면 2~3일 간격으로 1회(약 150mL) 두상관수했다. 실내 재배 4주 후 생육조사 결과, 대조구(0주, 온실환경)와 비교하여 모든 처리구의 SPAD값이 약 16 ‒ 25% 증가했다. L10은 분얼이 발생하지 않았지만 L30 1.6개, L50 2.1개가 증가했다. 엽면적은 L10에서 10% 감소한 반면, L30과 L50은 각각 3%, 18% 증가했다. 엽수의 경우, 광도에 따라 증가하여 L10 1.0배, L30 1.7배, L50 2.1배 처리 간 유의적 차이를 보였다. 생육 반응과 달리, 순광합성량은 처리 간 차이가 없었다. 대조구의 Fv/Fm값은 0.83로 나타났으며, 광도 증가에 따라 L10 0.82, L30 0.82, L50 0.80로 유의적 차이를 보이며 감소했다. 따라서, 생육반응과 광합성 효율에 따라 좀비비추는 실내 광도 10μmol·m<SUP>-2</SUP>·s<SUP>-1</SUP> 부근에서 생육이 억제되는 구간이 존재할 것으로 판단한다.
Yoo, Taesun,Cho, Heejin,Lee, Jiseok,Park, Haram,Yoo, Ye-Eun,Yang, Esther,Kim, Jin Yong,Kim, Hyun,Kim, Eunjoon Frontiers Media S.A. 2018 Frontiers in cellular neuroscience Vol.12 No.-
<P>Shank3 is an excitatory postsynaptic scaffolding protein implicated in multiple brain disorders, including autism spectrum disorders (ASD) and Phelan-McDermid syndrome (PMS). Although previous neurobiological studies on Shank3 and <I>Shank3</I>-mutant mice have revealed diverse roles of Shank3 in the regulation of synaptic, neuronal and brain functions, whether Shank3 expression in specific cell types distinctly contributes to mouse phenotypes remains largely unclear. In the present study, we generated two <I>Shank3</I>-mutant mouse lines (exons 14–16) carrying global and GABA neuron-specific deletions and characterized their electrophysiological and behavioral phenotypes. These mouse lines show similar decreases in excitatory synaptic input onto dorsolateral striatal neurons. In addition, the abnormal social and locomotor behaviors observed in global <I>Shank3</I>-mutant mice are strongly mimicked by GABA neuron-specific <I>Shank3</I>-mutant mice, whereas the repetitive and anxiety-like behaviors are only partially mimicked. These results suggest that GABAergic <I>Shank3</I> (exons 14–16) deletion has strong influences on striatal excitatory synaptic transmission and social and locomotor behaviors in mice.</P>
Lee, Seungjoon,Lee, Eunee,Kim, Ryunhee,Kim, Jihye,Lee, Suho,Park, Haram,Yang, Esther,Kim, Hyun,Kim, Eunjoon Frontiers Media S.A. 2018 Frontiers in molecular neuroscience Vol.11 No.-
<P>Shank2 is an abundant postsynaptic scaffolding protein implicated in neurodevelopmental and psychiatric disorders, including autism spectrum disorders (ASD). Deletion of <I>Shank2</I> in mice has been shown to induce social deficits, repetitive behaviors, and hyperactivity, but the identity of the cell types that contribute to these phenotypes has remained unclear. Here, we report a conditional mouse line with a <I>Shank2</I> deletion restricted to parvalbumin (PV)-positive neurons (<I>Pv-Cre;Shank2</I><SUP>fl/fl</SUP> mice). These mice display moderate hyperactivity in both novel and familiar environments and enhanced self-grooming in novel, but not familiar, environments. In contrast, they showed normal levels of social interaction, anxiety-like behavior, and learning and memory. Basal brain rhythms in <I>Pv-Cre;Shank2</I><SUP>fl/fl</SUP> mice, measured by electroencephalography, were normal, but susceptibility to pentylenetetrazole (PTZ)-induced seizures was decreased. These results suggest that <I>Shank2</I> deletion in PV-positive neurons leads to hyperactivity, enhanced self-grooming and suppressed brain excitation.</P>