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Fabrication and Characterization of ITO/BZN Thin Film Transistors
Eisuke Tokumitsu,Yohei Kondo 한국물리학회 2009 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.54 No.1
ITO channel thin film transistors (TFTs) with a Bi<SUB>1.5</SUB>Zn<SUB>1.0</SUB>Nb<SUB>1.5</SUB>O<SUB>7</SUB> (BZN) gate insulator have been fabricated and their electrical properties have been characterized. We first fabricated BZN films by using the sputtering technique and we showed that the film could induce a charge denisty as large as 6.6 µC/cm<SUP>2</SUP>. Next, we fabricated an ITO-channel TFT by using BZN as a gate insulator. Good electrical performance were demonstrated with an on/off current ratio of 10<SUP>8</SUP> and a subthreshold voltage swing of 280 mV/decade.
Soichiro Kondo,Kazufumi Takada,Taro Kojima,Kosuke Tanaka,Mitsutaka Yakabe,Eisuke Shibata,Yumi Umeda-Kamayama,Hidemasa Takao,Sumito Ogawa,Masahiro Akishita 대한노인병학회 2022 Annals of geriatric medicine and research Vol.26 No.3
A 91-year-old man with chronic cognitive impairment underwent shunt embolization for portosystemic encephalopathy (PSE). He experienced intermittent episodes of impaired consciousness and decreased cognitive function and activities of daily living (ADL), for which Alzheimer disease was suspected. On admission, he was in a coma and PSE was diagnosed based on his high ammonia level and the computed tomography findings. After shunt embolization, the patient fully recovered from the impaired consciousness and experienced no recurrence. The patient’s Revised Hasegawa Dementia Scale and Mini-Mental State Examination scores improved significantly from 12 and 17 to 30 and 29 points, respectively. The Barthel Index score also improved from 55/100 to 85/100, suggesting a marked improvement in ADL. PSE progresses slowly in very old patients and may mimic the clinical course of Alzheimer disease but without liver enzyme abnormalities. Therefore, it should be distinguished in every dementia case.
Yoshihito Fujita,Asuka Kondo,Hiroki Yamauchi,Eisuke Kako,Kazuya Sobue 대한마취통증의학회 2013 Korean Journal of Anesthesiology Vol.64 No.6
Background: The requisite anesthetic concentration of sevoflurane required to obtain adequate sedation when sufficient analgesics are supplied has not been determined. The purpose of this study was to determine the requisite age-associated concentration of sevoflurane to obtain an adequate level of anesthesia during combined epidural-general anesthesia by bispectral index (BIS) monitoring. Methods: Twenty-seven elective abdominal surgery patients (American Society of Anesthesiologists physical status I-II) were enrolled. The patients were divided into two groups of more or less than 60 years of age. We investigated the concentration of sevoflurane required to obtain an adequate sedation level during combined epidural-general anesthesia, maintaining the BIS value between 40 and 60. Results: The requisite sevoflurane concentration required to keep the BIS value at 40-60 was not stable during surgery. In the younger group, the maximum concentration of sevoflurane needed during surgery was 1.95 ± 0.14 (95% confidence interval: 1.87-2.10) vol%, while it was 1.54 ± 0.44 (95% confidence interval: 1.27-1.80) vol% in the older group (P < 0.01). Conclusions: The requisite concentration of sevoflurane required with combined epidural-general anesthesia was 2.5 vol% for the younger group and 2.0 vol% for the older group as determined by BIS monitoring. We believe that these percentages are sufficient to avoid awareness during surgery with adequate analgesia.