玉砂利を使用したオープンケーソンに作用する周面摩擦に関する研究(III)

Caissons or laterally loaded piers are widely used in marine constructions where loads are heavy, to support traffic poles and bridges to resist large lateral loads, and to support transmission line towers to resist large uplifting forces. The space system caisson (SS caisson) method, which is the operation method of constructing caisson foundation, is classified into open caisson construction method. In SS caisson method, space gravel is filled between caisson wall surface and soil. A detailed laboratory investigation was undertaken to study friction behavior of SS caisson. Friction between caisson wall surface and soil is reduced by the space gravel. Effects of density, water content, and penetration speed of caisson model were studied due to axial compression load. Observed results agreed well with those available in the literature. These results also indicated that small scale laboratory tests conducted in controlled conditions allow rapid and reliable information on field performance of SS caisson.textapplication/pdfdepartmental bulletin pape

統計的不確定性を考慮したシングルイベント発生率推定法の提案

application/pdf日本機械学会論文集 . 2019, 85 (877), P.19-00183journal articl

Observation of B̅0→DsJ*(2317)+K- Decay

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Solar neutrino measurements in Super-Kamiokande-II

The results of the second phase of the Super-Kamiokande solar neutrino measurement are presented and compared to the first phase. The solar neutrino flux spectrum and time variation as well as oscillation results are statistically consistent with the first phase and do not show spectral distortion. The timedependent flux measurement of the combined first and second phases coincides with the full period of solar cycle 23 and shows no correlation with solar activity. The measured 8B total flux is (2:38± 0.05(stat.)/begin+0.16 // -0.15/end (sys.)) × 10^6 cm^{-2} s^{-1} and the day-night difference is found to be (-6.3 ±4.2(stat.)±3.7(sys.))%.There is no evidence of systematic tendencies between the first and second phases.journal articl

Evaluation Method of Thin Films in Consideration of Penetration Depth of Excitation Light by Raman Spectroscopy

Raman measurements was performed using two different wavelengths lasers for three different kinds of thickness GaAsN / GaAs thin film. We have compared two methods of fitting. One was fitted with TO and LO peak of sample and another was fitted with 3 peaks, TO, LO and the substrate GaAs LO peak. It was found that the signal from the substrate was superimposed on the signal from the upper layer. In the care of thin film Raman measurement, it is necessary either using the excitation light having the shorter penetration depth than the film thickness or analyzing process to eliminate the influence of the substrate.departmental bulletin pape

浜岡原子力発電所周辺植生調査報告

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Resonant photon tunneling via surface plasmon polaritons through one-dimensional metal-dielectric metamaterials

We report resonant photon tunneling (RPT) through onedimensional metamaterials consisting of alternating layers of metal and dielectric. RPT via a surface plasmon polariton state permits evanescent light waves with large wavenumbers to be conveyed through the metamaterial. This is the mechanism for sub-wavelength imaging recently demonstrated with a super-lens. Furthermore, we find that the RPT peak is shifted from the reflectance dip with increasing the number of Al layers, indicating that the shift is caused by the losses in the RPT.journal articl

Assessment of genetic risk for myocardial infarction

application/pdfAlthough lifestyle and environmental factors influence the prevalence of myocardial infarction, genetic epidemiological studies have suggested that several genetic variants increase the risk for this condition.We have performed a large-scale association study to identify gene polymorphisms for reliable assessment of the genetic risk of myocardial infarction. The study population comprised 3,483 unrelated Japanese individuals (1,913 men; 1,570 women), including 1,192 subjects with myocardial infarction and 2,291 controls.The genotypes for 164 polymorphisms of 137 candidate genes were determined with an oligonucleotide ligation assay based on analysis of fluorescent microspheres with suspension array technology. Multivariable logistic regression analysis with adjustment for age, sex, body mass index, and the prevalence of smoking, hypertension, dia-betes mellitus, and hypercholesterolemia revealed that the 677C→T (Ala222Val) polymorphism of MTHFR, the 1595C→G (Ser447Stop) polymorphism of LPL, and the –108/3G→4G polymorphism of IPF1 were significantly associated with the prevalence of myocardial infarction.A stepwise forward selection procedure demonstrated that IPF1, MTHFR, and LPL genotypes significantly affected the prevalence of myocardial infarction. Combined genotype analysis of these polymorphisms yielded a maximum odds ratio of 2.54 for the combined genotype of TT for MTHFR,CC for LPL,and 3G3G for IPF1.The genotypes for MTHFR, LPL, and IPF1 may prove reliable for assessment of genetic risk for myocardial infarction. Determination of the combined genotype for these genes may contribute to primary, personalized prevention of this condition.journal articl