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Kim, Yoon Jang,Oh, Seungha,Yang, Bong Seob,Han, Sang Jin,Lee, Hong Woo,Kim, Hyuk Jin,Jeong, Jae Kyeong,Hwang, Cheol Seong,Kim, Hyeong Joon American Chemical Society 2014 ACS APPLIED MATERIALS & INTERFACES Vol.6 No.16
<P>This study examined the structural, chemical, and electrical properties of solution-processed (Zn,Sn)O<SUB>3</SUB> (ZTO) films with various Sn/[Zn+Sn] ratios for potential applications to large-area flat panel displays. ZTO films with a Zn-rich composition had a polycrystalline wurtzite structure. On the other hand, the Sn-rich ZTO films exhibited a rutile structure, where the Zn atom was speculated to replace the Sn site, thereby acting as an acceptor. In the intermediate composition regions (Sn/[Zn+Sn] ratio from 0.28 to 0.48), the ZTO films had an amorphous structure, even after annealing at 450 °C. The electrical transport properties and photobias stability of ZTO thin film transistors (TFTs) were also examined according to the Sn/[Zn+Sn] ratio. The optimal transport property of ZTO TFT was observed for the device with an amorphous structure at a Sn/[Zn+Sn] ratio of 0.48. The mobility, threshold voltage, subthreshold swing, and on/off current ratio were 4.3 cm<SUP>2</SUP>/(V s), 0 V, 0.4 V/decade, and 4.1 × 10<SUP>7</SUP>, respectively. In contrast, the device performance for the ZTO TFTs with either a higher or lower Sn concentration suffered from low mobility and a high off-state current, respectively. The photoelectrical stress measurements showed that the photobias stability of the ZTO TFTs was improved substantially when the ZTO semiconducting films had a lower oxygen vacancy concentration and an amorphous structure. The relevant rationale is discussed based on the phototransition and subsequent migration mechanism from neutral to positively charged oxygen vacancies.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2014/aamick.2014.6.issue-16/am503351e/production/images/medium/am-2014-03351e_0008.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am503351e'>ACS Electronic Supporting Info</A></P>
Dynein light chain LC8 inhibits osteoclast differentiation and prevents bone loss in mice.
Kim, Hyeryeon,Hyeon, Seungha,Kim, Hojin,Yang, Yoohee,Huh, Ji Young,Park, Doo Ri,Lee, Hyojung,Seo, Dong-Hyun,Kim, Han-Sung,Lee, Soo Young,Jeong, Woojin Williams Wilkins 2013 JOURNAL OF IMMUNOLOGY Vol.190 No.3
<P>NF-κB is one of the key transcription factors activated by receptor activator of NF-κB ligand (RANKL) during osteoclast differentiation. The 8-kDa dynein L chain (LC8) was previously identified as a novel NF-κB regulator. However, its physiological role as an NF-κB inhibitor remains elusive. In this study, we showed the inhibitory role of LC8 in RANKL-induced osteoclastogenesis and signaling pathways and its protective role in osteolytic animal models. LC8 suppressed RANKL-induced osteoclast differentiation, actin ring formation, and osteoclastic bone resorption. LC8 inhibited RANKL-induced phosphorylation and subsequent degradation of IκBα, the expression of c-Fos, and the consequent activation of NFATc1, which is a pivotal determinant of osteoclastogenesis. LC8 also inhibited RANKL-induced activation of JNK and ERK. LC8-transgenic mice exhibited a mild osteopetrotic phenotype. Moreover, LC8 inhibited inflammation-induced bone erosion and protected against ovariectomy-induced bone loss in mice. Thus, our results suggest that LC8 inhibits osteoclast differentiation by regulating NF-κB and MAPK pathways and provide the molecular basis of a new strategy for treating osteoporosis and other bone diseases.</P>
김승해(Seunghae Kim) 한국통신학회 2022 한국통신학회 학술대회논문집 Vol.2022 No.2
세그먼트 라우팅은 인접 라우터와의 가상망과 일반 라우팅 목적지 기반이 아닌 출발지 기반의 라우팅 기술로서 광전송장비와 같은 수준의 망절체가 가능하도록 설계가 가능하여 망이중화 및 고가의 회선절체를 만들 수 있는 표준화된 기술이다. 본 논문은 이러한 세그먼트 라우팅 기술을 과학기술연구망의 국제망 구간에 적용하여 망생존성을 향상하고 회선 단절시 50ms 절체가 가능한 세그먼트 라우팅을 적용하기위해 설계하고 구현하였다.