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알루미늄 도핑된 하프늄 산화물과 비정질 InGaZnO를 이용한 강유전성 MFSM 캐패시터
장유성(Yuseong Jang),이수연(Soo-Yeon Lee) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.10
강유전체 특성 발현을 위해서는, HfO₂ 박막 상부 물질로 금속 화합물 TiN 전극을 사용하거나, Zr 원소를 도핑하는 것이 일반적이었다. 본 연구에서는 Al 원소를 도핑한 HfO₂ 박막과 비정질 산화물 반도체 InGaZnO (IGZO)를 이용한 metal-ferroelectric-semiconductor -metal (MFSM) 캐패시터 구조를 최초로 제작하여 잔여 분극 7.7 µC/cm²을 달성하였다. 본 연구를 통해 강유전체 기반 산화물 반도체 박막 트랜지스터 후속 연구에 큰 기여를 할 것으로 기대된다.
김세훈(Sehoon Kim),박중민(Jungmin Park),김기성(Kiseong Kim),도유성(Yuseong Do),장명기(Myungki Jang),류승수(Seungsoo Ryu) 한국자동차공학회 2020 한국자동차공학회 부문종합 학술대회 Vol.2020 No.7
In general, a sport utility vehicle (SUV) vehicle has a luggage room for loading various loads behind a two-row seat of a hatchback vehicle. The luggage room aims to secure maximum space to accommodate more and larger luggage. In some vehicles, partitions and the like are used to increase usability in order to efficiently use the open space. Many vehicles have separate storage spaces, such as trays, at the bottom of the luggage room in accordance with the driver"s usability and in order to facilitate the utilization and convenience of the storage space. The purpose of this study is to develop a new mechanism that provides the intermediate stop function that can be fixed in the hinge without the need for a separate fixed part when the luggage is rotated. Accordingly, it was specified through concept development and analytical design verification, and an evaluation method was developed to verify its usefulness.
Kim, Young-Won,Zhou, Tong,Ko, Eun-A,Kim, Seongtae,Lee, Donghee,Seo, Yelim,Kwon, Nahee,Choi, Taeyeon,Lim, Heejung,Cho, Sungvin,Bae, Gwanhui,Hwang, Yuseong,Kim, Dojin,Park, Hyewon,Lee, Minjae,Jang, Eunk The Korean Society of Pharmacology 2019 The Korean Journal of Physiology & Pharmacology Vol.23 No.2
Pruritus (itching) is classically defined as an unpleasant cutaneous sensation that leads to scratching behavior. Although the scientific criteria of classification for pruritic diseases are not clear, it can be divided as acute or chronic by duration of symptoms. In this study, we investigated whether skin injury caused by chemical (contact hypersensitivity, CHS) or physical (skin-scratching stimulation, SSS) stimuli causes initial pruritus and analyzed gene expression profiles systemically to determine how changes in skin gene expression in the affected area are related to itching. In both CHS and SSS, we ranked the Gene Ontology Biological Process terms that are generally associated with changes. The factors associated with upregulation were keratinization, inflammatory response and neutrophil chemotaxis. The Kyoto Encyclopedia of Genes and Genomes pathway shows the difference of immune system, cell growth and death, signaling molecules and interactions, and signal transduction pathways. Il1a, Il1b and Il22 were upregulated in the CHS, and Tnf, Tnfrsf1b, Il1b, Il1r1 and Il6 were upregulated in the SSS. Trpc1 channel genes were observed in representative itching-related candidate genes. By comparing and analyzing RNA-sequencing data obtained from the skin tissue of each animal model in these characteristic stages, it is possible to find useful diagnostic markers for the treatment of itching, to diagnose itching causes and to apply customized treatment.