地震時における大型水槽のスロッシング解析

The sloshing response of a large water reservoir under the seismic acceleration was investigated by using a flow visualization technique, PIV measurement and numerical simulation. Transient flow pattern was observed by a high speed CCD camera and micro bubbles were analyzed in order to obtain the flow velocity with cross correlation method. The impact pressure of sloshing fluctuation was measured with pressure transducer mounted on the top plate. The pressure history was digitized and averaged for ensemble of sloshing cycle. Numerical simulation also performed for the tank design. A practical seismic wave was used in the numerical calculation. Consequently, a severe criteria for the tank design was deduced from the present results.textapplication/pdfdepartmental bulletin pape

A balloon-borne very long baseline interferometry experiment in the stratosphere: Systems design and developments

application/pdfAdvances in Space Research. 2019, 63 (1), P.779-793journal articl

Study on the Heat Transfer in the Combustion Chamber Wall of S.I. Engine (Investigation of Negligible Mainstream)

In order to solve an environmental problem, it is necessary to improve the thermal efficiency of an internal combustion engine. In addition, understanding of the heat transfer on the combustion chamber wall from the burnt gas is necessary. Therefore, in order to calculate the heat transfer from the burned gas to the combustion chamber wall, it is necessary to evaluate the heat transfer coefficient on the combustion chamber wall surface. However, it is difficult to calculate the heat transfer coefficient. Therefore, the equation is required to estimate the heat transfer coefficient with generality. In this study, we measured the heat flux on the combustion chamber wall by setting the thin film type heat flux probe at various places, cylinder head, cylinder liner and piston head, of the combustion chamber of the test engine (TRE). Furthermore, the measurement results were expressed by dimensionless numbers of Nusselt number (Nu) and Fourier number (Fo). And the heat flux calculated by an expression of relation was compared with the heat flux calculated by the expression of Woschni in each measurement points. As a result, the calculated of the heat transfer coefficients were closed to experimental value.departmental bulletin pape

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

journal articl

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

ローカル・アイデンティティの複合性 : 概念の使用法に関する検討(<特集>地方産業都市の興隆と安定 : 希望学・釜石調査からの考察)

地域再生の文脈で使用される「ローカル・アイデンティティ」という用語は, これまで複数の意味・水準で使われてきた. 明確な概念規定抜きで使用すると, 現場に混乱をもたらしかねない. これまでの使用例は, 個人レベル(個人の地域に対する帰属意識)と, 集合レベル(地域関係者の多くに共有されている地域内の要素), の二通りに大別できる. 現場では, 語義を明示して使用する必要があり, コミュニケーション・コストは高い. だが「アイデンティティ」という語は「自己認識」の意識を喚起する利点がある. ただし正負の両側面の複合的な自己認識が求められる. また「アイデンティティ」の語が誘発する本質化の危険性を避けるために, 「ローカル・アイデンティティ」を, 変化し得るものと把握することが必要である. 一方で「アイデンティティ」と言う以上, 保持すべき要素の弁別も欠かせない. ここでも複合的な認識が求められる. 地域の複合性を捉えるツールとすることに, 「ローカル・アイデンティティ」の語を用いる意義を見出すことができる.The term "local identity" is used to mean a number of different things. Its meanings can be classified into two broad categories: the individual level (an individual's sense of belonging to a community) and the collective level (elements within a community that are shared by many people within it). At the community level, there is a need to clarify this definition, and it is a complicated process. Here, the word "identity" is advantageous in that it triggers an awareness of the "recognition of the self." However, both positive and negative aspects should be recognized in a composite way. Also, in order to avoid the risk of falling into essentialism, "local identity" should be understood as changeable, and should be understood in a complex way, along with the elements that ought to be preserved.departmental bulletin pape

Dengue viremia does not correlate with disease severity.

(A) Dengue viral RNA levels in patients classified as primary and secondary dengue infections in bleed 1 (i) and bleed 2 (ii) with respect to the day of fever. An overlapping connecting line graph shows median values of the respective scatter plot. (B) Relationship between dengue plasma viremia and disease severity at the time of admission (i) and 48 h post admission (bleed 2) (ii) in patients with primary and secondary dengue infection. (C) Overall comparison of dengue viremia in all primary and secondary infections in bleed 1 (i) and bleed 2 (ii). Geometric mean value of the scatter plot is shown in all figures. Statistical significance was determined by Mann-Whitney test. ** P = 0.0074.</p

Correlation of viremia with secreted biochemical markers.

Correlation of viremia with secreted biochemical markers.</p

Cytokine profile in patients with primary and secondary infections Plasma cytokine/chemokine/inflammatory mediator levels in the plasma of primary and secondary dengue infection with indicated severities.

(A) IFN-α (B) IFN-γ (C) IL-7, (D) IL-12p70, (E) MCP-1, (F) sCD40L (G) IL-6 (H) IL-8, (I) IL-10 and (J).IP-10. Median values are indicated by the bar. Dotted line represents the limit of detection.</p

Immune Response to Dengue Virus Infection in Pediatric Patients in New Delhi, India—Association of Viremia, Inflammatory Mediators and Monocytes with Disease Severity

<div><p>Dengue virus, a mosquito-borne flavivirus, is a causative agent for dengue infection, which manifests with symptoms ranging from mild fever to fatal dengue shock syndrome. The presence of four serotypes, against which immune cross-protection is short-lived and serotype cross-reactive antibodies that might enhance infection, pose a challenge to further investigate the role of virus and immune response in pathogenesis. We evaluated the viral and immunological factors that correlate with severe dengue disease in a cohort of pediatric dengue patients in New Delhi. Severe dengue disease was observed in both primary and secondary infections. Viral load had no association with disease severity but high viral load correlated with prolonged thrombocytopenia and delayed recovery. Severe dengue cases had low Th1 cytokines and a concurrent increase in the inflammatory mediators such as IL-6, IL-8 and IL-10. A transient increase in CD14⁺CD16⁺ intermediate monocytes was observed early in infection. Sorting of monocytes from dengue patient peripheral blood mononuclear cells revealed that it is the CD14+ cells, but not the CD16+ or the T or B cells, that were infected with dengue virus and were major producers of IL-10. Using the Boruta algorithm, reduced interferon-α levels and enhanced aforementioned pro-inflammatory cytokines were identified as some of the distinctive markers of severe dengue. Furthermore, the reduction in the levels of IL-8 and IL-10 were identified as the most significant markers of recovery from severe disease. Our results provide further insights into the immune response of children to primary and secondary dengue infection and help us to understand the complex interplay between the intrinsic factors in dengue pathogenesis.</p></div