http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yasuyuki Nakamura,Daisuke Hokuto,Fumikazu Koyama,Yasuko Matsuo,Takeo Nomi,Takahiro Yoshikawa,Naoki Kamitani,Tomomi Sadamitsu,Takeshi Takei,Yayoi Matsumoto,Yosuke Iwasa,Kohei Fukuoka,Shinsaku Obara,Tak 대한대장항문학회 2021 Annals of Coloproctolgy Vol.37 No.5
Purpose: Primary tumor location of colon cancer has been reported to affect the prognosis after curative resection. However, some reports suggested the impact was varied by tumor stage. This study analyzed the prognostic impact of the sidedness of colon cancer in stages II, III, and liver metastasis after curative resection using propensity-matched analysis.Methods: Right-sided colon cancer was defined as a tumor located from cecum to splenic flexure, while any more distal colon cancer was defined as left-sided colon cancer. Patients who underwent curative resection at Nara Medical University hospital between 2000 and 2016 were analyzed.Results: There were 110 patients with stage II, 100 patients with stage III, and 106 patients with liver metastasis. After propensity matching, 28 pairs with stage II and 32 pairs with stage III were identified. In the patients with stage II, overall survival (OS) and recurrence-free survival (RFS) were not significantly different for right- and left-sided colon cancers. In the patients with stage III, OS and RFS were significantly worse in right-sided colon cancer. In those with liver metastasis, OS of right-sided colon cancer was significantly worse than left-sided disease, while RFS was similar. Regarding metachronous liver metastasis, the difference was observed only in the patients whose primary colon cancer was stage III. In each stage, significantly higher rate of peritoneal recurrence was found in those with right-sided colon cancer.Conclusion: Sidedness of colon cancer had a significant and varied prognostic impact in patients with stage II, III, and liver metastasis after curative resection.
Robust Adaptive Control of Nonlinear Systems with Convex Input Constraints
Yasuyuki Satoh,Hisakazu Nakamura,Nami Nakamura,Hitoshi Katayama,Hirokazu Nishitani 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
In this paper, we propose a control Lyapunov function(CLF)-based robust nonlinear adaptive controller for the magnetic levitation system. The proposed controller consists of a pre-feedback compensator with an adaptive control mechanism and a robust stabilizing controller. By using this controller, again margin for closed loop system is guaranteed. The effectiveness of the proposed controller is confirmed by experiments.
Nakamura, Yasuyuki,Jang, So Young,Tanaka, Takayuki,Aratani, Naoki,Lim, Jong Min,Kim, Kil Suk,Kim, Dongho,Osuka, Atsuhiro WILEY-VCH Verlag 2008 Chemistry Vol.14 No.27
<P>We report the synthesis and characterization of L- and T-shaped porphyrin tapes as extensible structural motifs of two-dimensionally extended porphyrin tapes. The two-photon absorption (TPA) cross-section values (σ<SUP>(2)</SUP>) for L- and T-shaped porphyrin tapes as well as those for linear trimeric and tetrameric porphyrin tapes were measured by an open-aperture Z-scan method at 2300 nm, a wavelength at which the one-photon absorption contribution is either zero or almost negligible. Under these conditions, the σ<SUP>(2)</SUP> values for the linear porphyrin tape trimer and tetramer were determined to be 18 500 and 41 200 GM, respectively. The σ<SUP>(2)</SUP> value for the L-shaped trimer was determined to be 8700 GM, which is only half that of the linear trimer, whereas the σ<SUP>(2)</SUP> value for the T-shaped tetramer was measured to be 35 700 GM. These results clearly indicate the dependence of the TPA cross-section on the molecular shape, which underscores the importance of directionality in the π-conjugation pathway for the enhancement of TPA cross- section.</P> <B>Graphic Abstract</B> <P>Fused porphyrins: L- and T-shaped porphyrin tapes have been synthesized as extensible structural motifs of 2D extended-porphyrin tapes (see figure). Systematic measurement of the two-photon adsorption (TPA) properties of linear, L-, and T-shaped porphyrin tapes clearly indicate the importance of directionality in the π-conjugation pathway for the enhancement of the TPA properties. <img src='wiley_img/09476539-2008-14-27-CHEM200800776-content.gif' alt='wiley_img/09476539-2008-14-27-CHEM200800776-content'> </P>
Shortening of Calculation Time in the Finite Element Structure Analysis
Yoshitaka Nakamura,Yasuyuki Miyazaki 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
In nonlinear structure analysis, most of the calculation time is spent computing the inverse matrix of the stiffness matrix. In the present paper, the compliance modification method, in which the compliance matrix is directly modified, is modified so as to be widely and efficiently applied.
Enhancement of Radioprotection and Anti-Tumor Immunity by Yeast-Derived β-Glucan in Mice
Yoshimi Niwano,Yasuyuki Takagi,Takashi Nakamura,Takeo Hasegawa,Ikukatsu Suzuki,Masami Oshima,Hitoshi Tawaraya,Yeun-hwa Gu 한국식품영양과학회 2005 Journal of medicinal food Vol.8 No.2
Intraperitoneal injection of .-glucan was shown to greatly delay mortality in mice exposed to whole-bodyX-ray radiation and tumor growth in tumor-bearing mice. Since the leukocyte and lymphocyte numbers were increased by asingle dose of .-glucan, the radioprotective effect of .-glucan is probably mediated, at least in part, by a hemopoietic actionin irradiated mice. In addition, both natural killer (NK) and lymphokine-activated killer (LAK) activities were significantlyincreased by repeated doses of .-glucan. Augmented immunological activity as seen in increased NK and LAK activity by .-glucan seems to play a role in preventing secondary infections associated with irradiation, and probably contributes to theattenuated tumor growth in tumor-bearing mice through enhanced anti-tumor immunity. These results suggest that .-glucanmay be a promising adjunct treatment for cancer patients receiving radiotherapy.
Yoo, Hyejin,Yang, Jaesung,Nakamura, Yasuyuki,Aratani, Naoki,Osuka, Atsuhiro,Kim, Dongho American Chemical Society 2009 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.131 No.4
<P>Porphyrin rings CZ4, CZ6, and CZ8 that respectively comprise four, six, and eight porphyrins, immobilized in a thin PMMA film, have been investigated using single molecule fluorescence spectroscopy with a focus on the influences of the overall structural rigidity as the ring size of porphyrin array increases. Neighboring porphyrin moieties were linked directly to enhance through-bond electronic interactions and, as a consequence, efficient excitation energy migration processes like the natural LH2 complex. Unlike the ensemble study, the single molecule study using confocal microscopy could eliminate the averaging effect, and consequently provide detailed information on individual molecular behaviors. Indeed, in solution, as a dihedral angle between neighboring porphyrins decreases in the order of CZ6 > CZ8 > CZ4, red-shifted Q-absorption bands and faster excitation energy hopping rates were observed. However, at the single molecule level, we found that they show longer survival times, less frequent on-off behaviors, narrower fluorescence lifetime distributions, and high relative single molecular brightness in the order of CZ8 > CZ6 > CZ4, by recording fluorescence intensity trajectories. Especially, CZ4 reveals high photostability with its rigid structure, and about 3 porphyrin units among the 4 chromophores-constituted molecule behave as a collective coherent domain. Thus, our results single out CZ4 as a potential and promising candidate for application in artificial light harvesting solid-state devices.</P>
Valsalva Aneurysm Filled with Thrombi Mimicking a Cardiac Tumor
Yasuharu Lee,Naoki Mori,Daisuke Nakamura,Takahiro Yoshimura,Masayuki Taniike,Nobuhiko Makino,Hiroyasu Kato,Yasuyuki Egami,Ryu Shutta,Jun Tanouchi,Yoshio Yamada,Masami Nishino 대한심장학회 2012 Korean Circulation Journal Vol.42 No.12
A Valsalva aneurysm filled with thrombi can be difficult to diagnose, because it mimics a cardiac tumor. Both cardiac magnetic resonance imaging (MRI) and transesophageal echocardiogram (TEE) were performed on a patient who showed a low-echoic mass located between the atrial septum and the non-coronary sinus. Based on MRI findings allowing tissue characterization and the accurate location of the mass and the TEE findings of an irregular surface of the mass and a partial defect in the edge of the non-coronary sinus, we diagnosed the mass as a thrombosed Valsalva aneurysm that had perforated the inter-atrial septum. The operative findings coincided with the preoperative di-agnosis. Both MRI and TEE are useful for diagnosing this condition.