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  • 1
    Publication Date: 2015-03-21
    Description: The Dixit–Stiglitz–Krugman model is one of the most fundamental models in the new economic geography, and is described by the nominal wage equation. We obtain sufficient conditions for the existence and uniqueness of short-run equilibrium of this model, where a short-run equilibrium is defined by a solution of the nominal wage equation under the condition that the worker distribution is given. We construct an iteration scheme to obtain numerical short-run equilibria. No restriction is imposed on the total number of locations where economic activities are conducted.
    Print ISSN: 0272-4960
    Electronic ISSN: 1464-3634
    Topics: Mathematics
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  • 2
    Publication Date: 2016-01-07
    Description: The DNA Data Bank of Japan Center (DDBJ Center; http://www.ddbj.nig.ac.jp ) maintains and provides public archival, retrieval and analytical services for biological information. The contents of the DDBJ databases are shared with the US National Center for Biotechnology Information (NCBI) and the European Bioinformatics Institute (EBI) within the framework of the International Nucleotide Sequence Database Collaboration (INSDC). Since 2013, the DDBJ Center has been operating the Japanese Genotype-phenotype Archive (JGA) in collaboration with the National Bioscience Database Center (NBDC) in Japan. In addition, the DDBJ Center develops semantic web technologies for data integration and sharing in collaboration with the Database Center for Life Science (DBCLS) in Japan. This paper briefly reports on the activities of the DDBJ Center over the past year including submissions to databases and improvements in our services for data retrieval, analysis, and integration.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
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  • 3
    Publication Date: 2017-01-05
    Description: The DNA Data Bank of Japan (DDBJ) ( http://www.ddbj.nig.ac.jp ) has been providing public data services for thirty years (since 1987). We are collecting nucleotide sequence data from researchers as a member of the International Nucleotide Sequence Database Collaboration (INSDC, http://www.insdc.org ), in collaboration with the US National Center for Biotechnology Information (NCBI) and European Bioinformatics Institute (EBI). The DDBJ Center also services Japanese Genotype-phenotype Archive (JGA), with the National Bioscience Database Center to collect human-subjected data from Japanese researchers. Here, we report our database activities for INSDC and JGA over the past year, and introduce retrieval and analytical services running on our supercomputer system and their recent modifications. Furthermore, with the Database Center for Life Science, the DDBJ Center improves semantic web technologies to integrate and to share biological data, for providing the RDF version of the sequence data.
    Print ISSN: 0305-1048
    Electronic ISSN: 1362-4962
    Topics: Biology
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  • 4
    Publication Date: 2015-10-10
    Description: Flow cytometry and microscopy are equally important in cell analysis. However, few reports have compared the optical data (cell size, internal complexity and fluorescent signal) from flow cytometry and microscopy. In this study, we compared the scattergram from XN-series, a flow cytometry based hematology analyzer with microscopic images of similarly treated leukocytes, and investigated the correlation between the appearance in the scattergram and cell size, internal complexity and fluorescence intensity. Healthy human peripheral blood was analyzed using the XN analyzer. For microscopic comparison, five types of leukocytes (monocytes, lymphocytes, basophils, neutrophils and eosinophils) were isolated from the peripheral blood by centrifugation and magnetic cell sorting, treated with a specific reagent and analyzed using electron microscopy, laser microscopy and confocal laser microscopy. Cell size, residual internal structures and fluorescence intensity correlated with intensity of forward-scattering, side scattering and fluorescent light. In this study, optical data from a clinically used hematology analyzer was clarified using microscopic images.
    Print ISSN: 0022-0744
    Electronic ISSN: 1477-9986
    Topics: Electrical Engineering, Measurement and Control Technology , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2016-12-25
    Description: This paper presents a new method of computing internal displacement, stress, strain, and gravitational changes caused by a point dislocation in a spherical Earth model. Specifically, the asymptotic solutions of the radial functions are introduced. The conventional method expresses the deformation field as an infinite series of spherical harmonics, and it cannot avoid the problem of the series not converging near the dislocation. The proposed method using asymptotic solutions can overcome this problem and compute the deformation field even near the dislocation. This paper focuses on deformations in a homogeneous sphere to elucidate the problem and solve it with simplicity. The proposed method is used to compute the volumetric strains caused by four independent dislocation types: vertical strike-slip, vertical dip-slip, horizontal tensile fracturing and vertical tensile fracturing. The effect of sphericity on the deformation field is also investigated by comparing the computational results with those for a homogeneous semi-infinite medium. The discrepancy between the results of the homogeneous sphere and those of the half-space reached up to 15–20 per cent at an epicentral distance of 2 $^\circ$ –5°. In particular, large differences were observed in the following cases: (i) the dislocation type is tensile fracturing, (ii) the depth of the source is large and (iii) the strain is measured at a large depth (for any source depth).
    Keywords: Seismology
    Print ISSN: 0956-540X
    Electronic ISSN: 1365-246X
    Topics: Geosciences
    Published by Oxford University Press on behalf of The Deutsche Geophysikalische Gesellschaft (DGG) and the Royal Astronomical Society (RAS).
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