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Kana Ito,Ayaka Kamura,Kyotaro Koshika,Toshiyuki Handa,Nobuyuki Matsuura,Tatsuya Ichinohe 대한치과마취과학회 2022 Journal of Dental Anesthesia and Pain Medicine Vol.22 No.6
Background: This study aimed to investigate the relationship between pharyngeal morphology and the success or failure of blind nasotracheal intubation using standard lateral cephalometric radiography and to analyze the measurement items affecting the difficulty of blind nasotracheal intubation. Methods: Assuming a line perpendicular to the Frankfort horizontal (FH) plane, the reference point (O) was selected 1 cm above the posterior-most end of the hard palate. A line passing through the reference point and parallel to the FH plane is defined as the X-axis, and a line passing through the reference point and perpendicular to the X-axis is defined as the Y-axis. The shortest length between the tip of the uvula and posterior pharyngeal wall (AW), shortest length between the base of the tongue and posterior pharyngeal wall (BW), and width of the glottis (CW) were measured. The midpoints of the lines representing each width are defined as points A, B, and C, and the X and Y coordinates of each point are obtained (AX, BX, CX, AY, BY, and CY). For each measurement, a t-test was performed to compare the tracheal intubation success and failure groups. A binomial logistic regression analysis was performed using clinically relevant items. Results: The items significantly affecting the success rate of blind nasotracheal intubation included the difference in X coordinates at points A and C (Odds ratio, 0.714; P-value, 0.024) and the ∠ABC (Odds ratio, 1.178; P-value, 0.016). Conclusion: Using binomial logistic regression analysis, we observed statistically significant differences in AX-CX and ∠ABC between the success group and the failure group.
LMI-based Robust Command Shaping Against Plant Perturbations in Fast and Precise Positioning
Kazuaki Ito,Masafumi Yamamoto,Makoto Iwasaki,Nobuyuki Matsui 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper presents a novel position command shaping approach for the mechanical vibration suppression in mechatronic systems. Although conventional command shaping approaches can suppress the specified mechanical vibrations, mechanical and/or electrical perturbations in plant may deteriorate the motion performance. In this research, a Linear Matrix Inequality (LMI) design framework is applied to eliminate the deterioration in positioning, where a robust command shaping against the plant perturbations can be directly achieved under the constraint of state variables in system. The effectiveness of the proposed shaping has been verified by numerical simulations and experiments using a prototype.
STM TIP-CURRENT-INDUCED POLYMERIZATION OF C60, Ce2@C80 AND Lu2@C76
HISANORI SHINOHARA,KAZUNORI OHASHI,NOBUYUKI FUKUI,MASAHIRO AKACHI,TAKAO AKACHI,HISASHI UMEMOTO,YASUHIRO ITO,TOSHIKI SUGAI,RYO KITAURA 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2009 NANO Vol.4 No.5
Polymerization of C60, Ce2@C80, and Lu2@C76 metallofullerenes induced by electron injection from a scanning tunneling microscope (STM) tip has been studied. C60 polymerization has been observed only with C60 multilayer on Au(111) and not with C60 monolayer on Au(111). The Ce2@C80 metallofullerene on Si(111)-7 × 7 also polymerizes by electron injection but has less polymerization reactivity than C60. Interestingly, the Lu2@C76 metallofullerene on Si(111)-7 × 7 does not show any polymerization. Based on these STM observations on the tip-induced polymerization, the direction of the bond formation and the dependence of reactivity on the kind of fullerenes are discussed.