A STUDY ON THE TSUNAMI DISASTER MECHANISM ON COASTAL STRUCTURES DUE TO INSTABILITY OF RUBBLE MOUND AND SEABED GROUND AND ITS COUNTERMEASURE

名古屋工業大学博士(工学)Doctor of Engineering主査：前田　健一doctoral thesi

Toward a Cosmology -Herman Melville's “The Encantadas”

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“話す” 英語の力をつけるフリートーク

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L’intérêt indirect dans les conventions réglementées

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Elimination of nitroxide radical dialyzed in the hippocampus during kainate-induced seizure in rats

Time-dependent changes of the electron spin resonance （ESR） signal intensity of the nitroxide radical applied to the ventral hippocampus by in vivo brain dialysis were evaluated using ESR spectrometry in rats during convulsions induced by kainic acid [20mg/kg i.p., 0.2 ml; G（Ka）], and compared with the intensity changes in control rats （0.2 ml saline i.p., G（sl））. After the perfusion of the nitroxide radicals for 120 min by dialysis at the rate of 2 μl/min, the rats were administered kainic acid or saline intraperitoneally and the perfused liquor was switched to Ringer's solution at the same time. The dialysates of Ringer's solution were then collected at 20-min intervals in test tubes. Spectra were observed from the area perfused with the nitroxide radical in both groups. The half-life, which was estimated on the basis of the exponential decay of amplitude of the nitroxide radical perfused into hippocampal extracellular space, was used as a parameter of elimination activity in the brain of rats during convulsion status. The half-life in the rats during convulsion was significantly longer than that in the control rats （p< 0.01）. This finding shows that the elimination activity in the extracellular space of the brain during convulsion was decreased compared with that in the control. These results suggest that hippocampal cellular vulnerability to free radical attack is present during convulsions and explains one of the mechanisms for selective cellular damage in the hippocampus

Copper biosorption by chemically treated Micrococcus luteus cells

In order to clarify the binding states of copper in microbial cells, copper biosorption from aqueous systems using the chemically treated Micrococcus luteus IAM 1056 cells （hot water-treated, diluted NaOH-treated, chloroform-methanol-treated, and chloroformmethanol/concentrated KOH-treated cells） was examined. The intact cells of Micrococcus luteus adsorbed 527 μmol of copper per g cells, and its copper adsorption was very rapid and was affected by the solution pH. The chloroform-methanol/concentrated KOH-treated cells showed the higher copper biosorption capacity than the intact and the other chemically treated cells. The electron spin resonance （EPR） parameters, g// and |A//|, of Cu（II） ion in microbial cells indicate that Cu（II） ion in the intact and the all the chemically treated cells have coordination environments with nitrogen and oxygen as donor atoms, being similar to those of type II proteins. The parameter g// also indicated that the coupling between Cu（II） ion and the cell materials in the chloroform-methanol/ concentrated KOH treated cells is rather more stable than those between Cu（II） ion and cell materials in the other treated cells.The original publication is available at www.springerlink.co

Model-Based Optimization Approach for PID Control of Pitch–Roll UAV Orientation

This study focuses on the modeling and control optimization of the pitch-roll angles orientation in a quad-rotor UAV (unmanned aerial vehicle) drone system. To address the control challenge, PID (proportional-integral-derivative) controllers are used, which have been tuned through a model-based optimization approach. A non-linear model of the system is obtained and further validated experimentally. The model is implemented in Simulink to conduct model-based optimization. The controller design uses an IMC (internal model control) model-based approach to establish the initial parameters for a PID controller. In the subsequent design phase, a multiobjective approach is taken, incorporating weighted cost functions that account for IAE (integral absolute error) and ITAE (integral of time-weighted absolute error) forms, along with battery usage. The outcomes of this design are showcased through simulations and real-world platform testing

Biosorption of Heavy Metal Elements such as Uranium by Microorganisms and Its Effect on Hydroxy Radical Generation

The effect of uranium biosorption on the hydroxy radical generation in UO2 2+-H2O2 system were investigated. The amounts of uranium adsorbed by bacterial cells are differed with different species of bacteria, and Arthrobacter nicotianae has the highest ability to adsorb uranium among bacteria tested. ESR signal having four lines （intensity ratio, 1:2:2:1 ） is observed in UO2 2+-H2O2 system. Its g-value and hyperfine constants were estimated to be g = 2.0066, aN = 1.49 mT and aH = 1.49 mT by the computer simulation, and the signal was identified to DMPO-OH. The ESR signal intensity of DMPO-OH in UO2 2+-H2O2 system increases as the time passing, which is quite different from Fe2+-H2O2, VO2+-H2O2, and Cu2+-H2O2 systems. Three steps of reactions were assumed for the hydroxy radical generation; （1） reduction of UO2 2+ to UO2 + by H2O2, （2） disproportionation of resulting UO2 + to UO2+ and UO2 2+, （3） oxidation of resulting UO2+ to UO2 2+ by H2O2 and generation of hydroxy radical. When bacterial cells are added to the reaction mixture, ESR signal intensity of DMPO-OH decreases. Egg albumin also indicates similar suppression effect. Two possibile mechanisms were proposed to these results; （1） hydroxy radical was eliminate by the antioxidant action of microbial cells, and then DMPO-OH decreases. （2） microbial cells strongly couples with uranyl ion, which suppresses the uranyl ion reduction by H2O2, and then DMPO-OH decreases

Comparison of Surgical Therapy of Gastric Cancer in Japan and Germany

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The Possibility of Learning English Paraphrasing Using Google Translate

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