Nagoya Institute of Technology

About: Nagoya Institute of Technology is a education organization based out in Nagoya, Japan. It is known for research contribution in the topics: Thin film & Catalysis. The organization has 10766 authors who have published 19140 publications receiving 255696 citations. The organization is also known as: Nagoya Kōgyō Daigaku & Nitech.

System Reliability Assessment by Method of Moments

Abstract: The computational assessment of system reliability of structures has remained a challenge in the field of reliability engineering. Calculation of the failure probability for a system is generally difficult even if the potential failure modes are known or can be identified, because available analytical methods require determination of the sensitivity of performance functions, information on mutual correlations among potential failure modes, and determination of design points. In the present paper, a method based on moment approximations is proposed for structural system reliability assessment that is applicable to both series and nonseries systems. The point estimate method is applied to evaluate the first few moments of the system performance function of a structure from which the moment-based reliability index and failure probability can be evaluated without Monte Carlo simulations. The procedure does not require the computation of derivatives, nor determination of the design point and computation of mutual correlations among failure modes; thus, it should be computationally effective for structural assessment of system reliability.

Evidence of water-cooperative proton conduction in silica glasses

Abstract: The effect of molecular water on proton conduction was quantitatively analyzed from conductivity measurements of silica glasses with and without water molecules. The activation energy for conduction linearly decreased with increasing logarithm of proton concentration for glasses containing only protons as charge carriers and as the logarithm of the product of proton and water concentration for glasses containing both proton and water. Electrical conduction in glasses containing both protons and water molecules is associated with proton hopping between hydroxyl and water molecules and its activation energy is related to the energy necessary for the dissociation of the proton from OH and ${\mathrm{H}}_{2}$O.

Comparison and evaluation of electromagnetic absorption characteristics in realistic human head models of adult and children for 900-MHz mobile telephones

Abstract: The controversy on the dosimetry in children's heads for mobile telephones is still inconsistent Gandhi's group [1996, 2002] reported a considerable increase of the spatial peak specific absorption rate (SAR) in children's heads, while Kuster's group [1998] claimed that there was not a significant difference in the SAR between children and adults In this paper, based on Japanese children's statistical data on external shapes of heads, we developed two kinds of children's models from a Japanese adult head model Using the children's head models, we calculated the local peak SAR under the same conditions as those previously employed by Gandhi's and Kuster's groups Compared to the local peak SAR in the adult head model, we found a considerable increase in the children's heads when we fixed the output power of the monopole-type antenna, but no significant differences when we fixed the effective current of the dipole-type antenna This finding suggests that the contradictory conclusions drawn by the above two groups may be due to the different conditions in their numerical peak SAR calculations

Photocatalytic reduction of CO2 on Cu2O-loaded Zn-Cr layered double hydroxides

Abstract: A series of Cu 2 O-loaded Zn-Cr layered double hydroxides (LDHs) was prepared via an in situ reduction process from Cu-Zn-Cr ternary LDHs and applied to the photoreduction of CO 2 . The formation of Cu 2 O nanoparticles and the preservation of the LDH structure was confirmed by X-ray diffraction and transmission electron microscopy. Among the loaded LDHs, the 0.1Cu 2 O@Zn 1.8 Cr LDH exhibited optimal activity for the conversion of CO 2 into CO in pure water and was superior to both the corresponding Cu-Zn-Cr ternary LDH and pristine Zn 2 Cr LDHs. In addition, the production of CO was further promoted by increasing the solubility of CO 2 using a nano-bubble solution instead of pure water. The loaded Cu 2 O nanoparticles probably function as effective electron traps, promoting charge separation and providing active sites for CO 2 reduction.

Reliability and Validity of Japanese Versions of the Flourishing Scale and the Scale of Positive and Negative Experience

Abstract: The Flourishing Scale (FS) and the Scale of Positive and Negative Experience (SPANE) developed by Diener et al. (Soc Indic Res 97:143–156, 2010) are brief subjective measures to assess psychological flourishing and feelings. The FS provides a single score from eight items. The 12-item SPANE yields three scores: a positive score (SPANE-P), a negative score (SPANE-N), and a balance score (SPANE-B). In this study, the reliability and validity of the Japanese versions of these scales were evaluated using a sample of 520 Japanese college students. Results showed that the Japanese versions had good internal consistency (Cronbach’s alpha of 0.88–0.95). The proposed single-factor structure of the FS and two-factor structure of the SPANE were supported by both principal axis factor analysis and confirmatory factor analysis. Acceptable convergent validity of both Japanese versions was shown by correlations with scores for life satisfaction, subjective happiness, optimism, pessimism, positive and negative affect, depression, anxiety, and psychological stress. Moreover, the FS scores expectedly correlated with SPANE-P, SPANE-N, and SPANE-B. The Japanese versions of the FS and SPANE had acceptable reliability and validity, similar to the properties of the original versions