An Efficient Web Page Recommendation Based on Preference Footprint to Browsed Pages

This paper proposes a new scheme for web page recommendation which reflects the preference of each user to the recommended pages in an efficient and effective manner. The basic idea of the scheme is to combine the notion of preference footprint to browsed pages with the collaborative filtering. More concretely, we introduce the notion of "tags" similar to conventional SBS (Social Bookmark Service), and attach all tags associated with a user to a page when it is browsed by him. We implemented a prototype of the proposed scheme, and conducted preliminary experiments to evaluate the performance of the scheme. The result of experiments indicates that it takes less than 0.5 sec to reorder a list of 500 URLs received from a search engine according to the preference of users

リノーマロン除去による高精度QCD計算法の開発と重いクォーク系への応用

Tohoku University隅野行成課

Material damage in TBCs by a synthetic CMAS and the non-destructive detection:-An exploration via a single crystal YSZ-

More recently a new type of damage has been pronounced in thermal barrier coatings (TBCs) by calcium-magnesium-alumino-silicates (CMAS) from ingestion of siliceous minerals under certain operating conditions, based on synthetic material in Table 1. In order to understand material aspect of CMAS damage, a study on material interaction between a synthetic CMAS and a single crystal yttria-stabilized zirconia (YSZ) was studied in this work. Here, the effect of crystallographic orientation on the interaction was also investigated. The experimental works clearly showed that the material interaction between the CMAS and YSZ was significant, resulting in the change in microstructural morphology(Fig. 1(a)). The extent of interaction depended on the crystallographic factor of the YSZ (Fig. 1(b)). The CMAS damage developed depending on the crystallographic plane of YSZ; it was the lowest onthe {111} plane.This is a noteworthy finding tomitigate the CMAS damagein EB-PVD top coat. The change in physical properties was also found to be pronounced at the CMAS damaged area. Based on these findings the non-destructive detection was also tried for engineering applications. Please click Additional Files below to see the full abstract

Identification of the residues that are responsible for improving the activities of cyanobacterial enzymes for hydrocarbon biosynthesis

Cyanobacteria can produce hydrocarbons corresponding to diesel fuels via a reaction catalyzed by two enzymes, acyl-ACP reductase (AAR) and aldehyde deformylating oxygenase (ADO). Because Escherichia coli coexpressing these enzymes can produce and secrete hydrocarbons, both AAR and ADO are key enzymes for hydrocarbon biosynthesis. However, the activities of AAR and ADO are low. Therefore, construction of highly active mutants of AAR and ADO is necessary for industrial application of these enzymes for producing hydrocarbons. Our purpose in this study is to identify the residues that are responsible for improving the activities of AAR and ADO. First, we compared the activity of AARs from several cyanobacteria and detected a highly active AAR. Second, we introduced various single amino acid substitutions into a poorly active AAR, to make its sequence close to that of the highly active AAR. When we constructed and analyzed 40 mutants of AAR, we succeeded in identifying the residues that are important for high activity of AAR and those important for high expression level of soluble AAR (Figure. 1). Combination of single mutations greatly improved the aldehyde productivity. Similarly, we also identified the residues that are important for high activity of ADO and those important for high expression level of soluble ADO (Figure. 2). Mutational analysis of ADO revealed that high productivity of hydrocarbons can be achieved by increasing both the activity and amount of soluble ADO. Our data will be useful for producing higher amount of hydrocarbons using highly active mutants of AAR and ADO created by protein engineering. Please click Additional Files below to see the full abstract

Material damage in TBCs by a synthetic CMAS and the non-destructive detection:-An exploration via a single crystal YSZ-

More recently a new type of damage has been pronounced in thermal barrier coatings (TBCs) by calcium-magnesium-alumino-silicates (CMAS) from ingestion of siliceous minerals under certain operating conditions, based on synthetic material in Table 1. In order to understand material aspect of CMAS damage, a study on material interaction between a synthetic CMAS and a single crystal yttria-stabilized zirconia (YSZ) was studied in this work. Here, the effect of crystallographic orientation on the interaction was also investigated. The experimental works clearly showed that the material interaction between the CMAS and YSZ was significant, resulting in the change in microstructural morphology(Fig. 1(a)). The extent of interaction depended on the crystallographic factor of the YSZ (Fig. 1(b)). The CMAS damage developed depending on the crystallographic plane of YSZ; it was the lowest onthe {111} plane.This is a noteworthy finding tomitigate the CMAS damagein EB-PVD top coat. The change in physical properties was also found to be pronounced at the CMAS damaged area. Based on these findings the non-destructive detection was also tried for engineering applications. Please click Additional Files below to see the full abstract

Comparison of aldehyde-producing activities of cyanobacterial acyl-(acyl carrier protein) reductases

Additional file 1: Table S1. Cyanobacterial AARs found by the BLAST search. The group number in the phylogenetic tree is shown in the first column. In each group, the cyanobacterial strains are listed in the same order as in Fig. 1. Twelve representative AARs used in the present study are shown in bold

Inclusive ∣Vcb∣|V_{cb}| determination in MS‾\overline{\mathrm{MS}} mass scheme using dual-space-renormalon-subtraction method

We determine $|V_{cb}|$ from the inclusive semileptonic decay width of the $B$ meson with the known N$^3$LO perturbative coefficients for the first time in the $\overline{\mathrm{MS}}$ mass scheme. We make use of a recently developed method, dual-space-renormalon-subtraction (DSRS) method, to separate and subtract the order $\Lambda_{\rm QCD}^2/m_b$ infrared renormalon. This allows us to perform the analysis accurately in the $\overline{\mathrm{MS}}$ mass scheme, in which otherwise the perturbative series does not converge well up to the currently calculated perturbation order. Our result reads $|V_{cb}|=0.0415\,(^{+10}_{-12})$, which is consistent with the previous results based on other mass schemes and showing an independent cross check of the current theoretical evaluation of the inclusive decay width.Comment: 33 pages, 5 figures, version to appear in PR