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Impact of Gate Misalignment in Triple-Gate MOSFETs Fabricated on SOI Substrate
Na, K.-I.,Cristoloveanu, S.,Xiong, W.,Lee, J.-H.,Bae, Y. The Electrochemical Society 2012 ECS solid state letters Vol.1 No.2
<P>The fin width non-uniformity in a dumbbell layout, caused by lithography, is a potential shortcoming of FinFETs, triple-gate, and nanowire FETs. We have investigated the electrical properties of especially designed n-channel triple-gate SOI MOSFETs, where the gate was intentionally misaligned. Misalignment degrades the device properties (threshold voltage, subthreshold slope, transconductance, DIBL) when the gate is shifted from the central region of the channel. The channel-to-substrate coupling is minimized in symmetrical devices where the gate controls the thinnest section of the fin. The misalignment effects are explained by accounting for fin width non-uniformity, short-channel, and 3D inter-gate coupling mechanisms. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.009202ssl] All rights reserved.</P>
Primary school teachers' levels of self-efficacy according to various settlement areas
Naki Erdemir 서울대학교 교육연구소 2011 Asia Pacific Education Review Vol.12 No.2
The purpose of this study was to determine how elementary teachers use computers, the Internet, and educational technology in the educational process. The purpose was also to gain information regarding the teachers' possession of technological devices and their levels of self-efficacy in using them among the different types of settlement areas. The study was carried out with 300 elementary-level teachers. The Technology Usability Self-Efficacy Instrument (TUSEI) and a semi-structured interview form were the instruments used in the study. Statistically significant differences were found in the self-efficacy of teachers using computers, the Internet, and other technological devices according to different settlement areas in the responses given by the teachers within the framework of the scale. It was understood that teachers were able to search information on subjects of their choice by using search engines on the Internet, but they could not use these tools efficiently for educational purposes. Teachers' self-efficacies were also found to be inefficient in the ability to use writing and graphic programs in the computer environment.
Ali Naki Yucesoy 한국간담췌외과학회 2019 Annals of hepato-biliary-pancreatic surgery Vol.23 No.1
Backgrounds/Aims: It is needed to ensure bowel and biliary tract continuity after pancreaticoduodenectomies. It is possible to find a variety of reconstruction methods in literature. Methods: We realized a modified reconstruction method by performing proximal gastrojejunostomy, on a jejunal loop after Whipple’s pancreticoduodenectomy, with surgical succes in 7 patients with pancreatic head or periampullary carcinomas in a low-volume hospital 2009-2017. Results: A modified jejunal loop reconstruction method, was performed in 7 patients after Whipple’s pancreaticoduodenectomy. We had no perioperative mortality. Pancreatic fistula treated with medical attempts was observed following post-operative pancreatitis in a patient. No marginal ulceration was observed. Delayed gastric emptying was not observed, except for post-operative acute pancreatitis and pancreatic fistula developing in a patient. Conclusions: A modified reconstruction method by performing proximal gastrojejunostomy on a jejunal loop, can be considered as alternative reconstructive surgical procedure after pancreaticoduodenectomy.
A Methodology to Determine the Friction Coefficient in Flexforming (Fluidcell Forming) Process
H.Ali Hatipo?lu,Naki Polat,Arif Koksal 한국소성가공학회 2010 기타자료 Vol.2010 No.6
In this study, it is aimed to determine the friction coefficient between die surface and blank in flexforming (fluidcell forming) process in which a pressurized rubber diaphragm is used to form the sheet. An aluminum square pan is chosen for the workpiece and it is drawn at various pressures and friction conditions (with lubricant, without lubricant, etc.). Numerical models of the process are established with different friction coefficients and results are then compared with the experiments in order to determine the corresponding coefficients of the friction conditions. The displacement of the flange edge is used for comparison.
Yamamoto, Akira,Shin, Ryong-Woon,Hasegawa, Kazuhiro,Naki, Hironobu,Sato, Hiroyuki,Yoshimasu, Fumio,Kitamoto, Tetsuyuki 한림대학교 환경·생명과학연구소 2002 [일송 국제심포지엄] 노화와 만성퇴행성 신경질환 Vol.- No.4
Iron as well as aluminum is reported to accumulate in neurons with neurofibrillary tangles (NFTs) of Alzheimer's disease(AD) brain. Previously we demonstrated that aluminum(Ⅲ) shows phosphate-dependent binding with hyperphosphorylated τ(PHFτ), the major constituent of NFTs, thereby inducing aggregation of PHFτ. Herein we report that iron(Ⅲ) can also induce aggregation of soluble PHFτ to occur, iron in the oxidized state (Ⅲ) is essential since iron in the reduced state (Ⅲ) lacks such ability. Furthermore, iron (Ⅲ)-induced aggregation is reversed by reducing iron (Ⅲ) to iron (Ⅱ). Thus the iron-participating aggregation is mediated not only by τ phosphorylation but also by the transition of iron between reduced (Ⅱ) and oxidized (Ⅲ) states. Further incubation of insoluble PHFτ aggregates isolated from AD brain with reducing agents produced liberation of solubilized PHFτ and iron (Ⅱ), indicating that PHFτ in association with iron (Ⅲ) constitutes the insoluble pool of PHFτ. These results indicate that iron might play a role in the aggregation of PHFτ leading to the formation of NFTs in AD brain.