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71.
A Yoshizawa N Kobayashi K Kudo J Kabe N Ishiwa K Inagaki T Arai H Niino 《Canadian Metallurgical Quarterly》1996,34(12):1395-1400
A 52-year-old woman was admitted to our hospital because of repeated episodes of pneumonia in the middle lobe. She had also experienced coughing during meals. The history and chest CT findings suggested the presence of a bronchoesophageal fistula. An upper GI series revealed a fistula between an esophageal diverticulum and the superior segment bronchus of the right lower lobe. Fiberoptic bronchoscopy done immediately after the upper GI series revealed barium sulfate leaking from the superior segment bronchus of the right lower lobe into the middle lobe bronchus. These findings indicated that the repeated pneumonia in the middle lobe was caused by a congenital bronchoesophageal fistula. Examination of the resected fistula showed that it was a Braimbridge type I bronchoesophageal fistula. Although of at least 49 cases of congenital bronchoesophageal fistulas with esophageal diverticula have been reported in the Japanese medical literature, we know of no previous case in which such a fistula was associated with middle-lobe pneumonia. 相似文献
72.
A submarine optical fibre cable is developed which has excellent water propagation blocking properties. Propagation is estimated to be less than 750 m/month at a depth of 8000 m. It also has low-loss properties of 0.40 dB/km at a wavelength of 1.3 ?m. 相似文献
73.
Yoshitsune Shin‐ya Toru Yoshizawa Kyung‐Jin Hong Moo‐Yeal Lee Toshio Kajiuchi 《Polymer International》2003,52(5):838-842
N‐acetylated chitosans (NACs) with different degrees of N‐acetylation (DAs) were enzymatically depolymerized at pH 5.1 and 40 °C, and the molecular weight distributions (MWDs) of the depolymerized NACs were then measured by size exclusion chromatography and were fitted by the log‐normal distribution function with two distribution parameters, β and M0. We discuss also the time‐evolution of the distribution parameters derived from the experimentally obtained MWD as well as the effects of experimental conditions, such as DA and initial NAC concentration (S0), on the distribution parameters. Copyright © 2003 Society of Chemical Industry 相似文献
74.
Yoshizawa M. Abe K. Takedu H. Yambe T. Nitta S. 《IEEE engineering in medicine and biology magazine》1997,16(5):106-112
This article first describes the effectiveness and the limitations of classical approaches based on linear models for the cardiovascular system. The authors then introduce their own work on less-invasive and real-time estimation of cardiac output flow and pump function in the clinical setting. It is shown that system identification techniques using linear models can yield unexpectedly accurate results useful for patient care 相似文献
75.
Yoshizawa M. Takeda H. Watanabe T. Miura M. Yambe T. Katahira Y. Nitta S. 《IEEE transactions on bio-medical engineering》1992,39(3):243-252
This paper presents a new method of keeping one of the most suitable driving conditions for regulating the outflow volume from the ventricular-assist device (VAD). The experimental results from a mock circulatory system have shown that the relationship between the stroke volume and the systolic duration of the VAD can be specified by the combination of characteristic curves of the positive and negative drive pressures. The optimal operating point on the characteristic curve have been defined as the point at which thrombosis on the blood-contacting surface and hemolysis due to mechanical damage can be avoided and at which the driving energy can be minimized. The present analysis has been revealed that the optimal operating point is the vertex of the triangular figure obtained from the characteristic curve. The algorithms for keeping the optimal operating point and for regulating the stroke volume have been also proposed. 相似文献
76.
Preparation of hydrophilic polyethylene foam of open cell type by radiation grafting of acrylic acid
Kanako Kaji Motoyoshi Hatada Iwao Yoshizawa Choji Kohara Kuniaki Komai 《应用聚合物科学杂志》1989,37(8):2153-2164
Hydrophilic polyethylene foam was synthesized by radiation grafting of acrylic acid onto polyethylene foam of open cell type using monomer solution containing Mohr's salt which inhibits homopolymerization of the monomer. The graft foam was easily dyed by cationic dyes and showed excellent moisture regain. The wicking properties were also excellent and were almost the same as those of commercially available PVA foam. The surface resistivity of 1016 ohm of the original foam decreased to 106 ohm and half decay time of surface charge decreased from 8000 s to 1 s by the grafting, indicating that the grafted foam has excellent antistatic properties. 相似文献
77.
78.
The flux state of the organic superconductor -(BEDT-TTF)2Cu(NCS)2 has been investigated by ultrasonic measurements. The magnetic field dependence in the longitudinal sound velocity, shows a remarkable dip. The amount of the dip is proportional to cos, where is the angle between the propagation direction of the sound and the magnetic field. The magnetoresistance anomaly in this salt, which is seen in the same magnetic field range as for the sound velocity, has been interpreted by the thermal fluctuation of the Josephson coupling between the superconducting layers. The sound velocity anomaly is interpreted by this mechanism. It would be concluded that such anomaly is caused by a large Grüneisen parameter in this salt. 相似文献
79.
Noriyuki Yoshimoto Katsushi Hashimoto Masahito Yoshizawa 《Journal of Low Temperature Physics》1996,105(5-6):1709-1714
The equilibrium state and crystal growth of (BEDT-TTF)2I3 were investigated. Measurements of the temperature dependence of solubility and analyses of the components in the solution were carried out. The analysis of the solution showed that the crystals decompose into neutral BEDT-TTF and I2 molecules. As to the polymorphism, it was clarified that the -form is more stable than the -form in the temperature region between 0 and 50 °C. Using these information, we succeed in growing single crystals form BEDT-TTF and I2 and in control of the crystallizing polymorph. The polymorphic behavior was explained in terms of supersaturation as a driving force of crystal growth. 相似文献
80.
This paper describes excess loss of single-mode jacketed optical fibers at low temperature. A structural model is proposed for the jacketed fiber in order to investigate the relationship between the structure and excess loss. This model clarifies the excess loss increase mechanism that any initial irregularity existing in the jacketed fiber increases due to shrinkage of the jacket and causes excess loss. These results show that reducing the buffer diameter and controlling the fiber deformation inside the jacket are effective in suppressing excess loss at low temperature. 相似文献