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Search Results: 1 - 10 of 186 matches for " Yoshimasa "
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Customers’ Responses to Employee Extra Attention  [PDF]
Yoshimasa Kageyama, Albert Barreda
Open Journal of Business and Management (OJBM) , 2019, DOI: 10.4236/ojbm.2019.71004
Abstract:
Focusing on positive service experiences, this study examined the relation-ships among employee extra attention, customers delight, and customer re-purchase intentions. The target sample that had a positive interaction with an employee in the recent six months was invited to participate in the survey. The data analysis was performed in two steps: 1) Confirmatory Factor Analysis (CFA) and 2) Structural Equation Modeling (SEM). The results suggested that employees’ extra attention affects customer delight. Subsequently, customer delight has a positive relationship with customer repurchase intentions. Furthermore, employee extra attention has a positive relationship with customer repurchase intentions. The finding of the study provides valuable implications for research and the industry regarding generating favorable customer repurchase intentions in positive service experiences.
The monetary policy in the Netherlands East Indies under the Japanese administration
Shibata Yoshimasa
Bijdragen tot de Taal-, Land- en Volkenkunde , 1996,
Abstract:
Environmental factors that determine the occurrence and seasonal dynamics of Aphanizomenon flos-aquae
Yoshimasa YAMAMOTO
Journal of Limnology , 2009, DOI: 10.4081/jlimnol.2009.122
Abstract: This study investigated the seasonal dynamics of two populations of Aphanizomenon flos-aquae Ralfs ex Bornet & Flahault var. flos-aquae and four populations of A. flos-aquae var. klebahnii Elenkin in eutrophic water bodies over 1 year from February 2006 to January 2007. The growth of A. flos-aquae var. flos-aquae was promoted at high temperatures even if in one case the biomass development was very low when other co-occurring cyanoprokaryotes (Anabaena spp. and Microcystis spp.) were abundant. In contrast, the highest density of the other population of A. flos-aquae var. flos-aquae was observed in August when the population density of M. aeruginosa (Kützing) Kützing reached an annual peak. A. flos-aquae var. flos-aquae usually bloomed in summer but could also tolerate low temperatures in the winter, and was present in relatively high densities. The populations of A. flos-aquae var. klebahnii observed in this study can be divided into three groups based on preferred temperature; three populations increased in winter, and the other increased in summer. Large biomasses of the low-temperature-adapted A. flos-aquae were observed mainly during winter when population densities of co-occurring cyanoprokaryotes (Anabaena spp., Microcystis spp. and Planktothrix raciborskii (Woloszynska) Anagnostidis & Komárek) were relatively low or almost absent. The increase in or existence of cooccurring cyanoprokaryotes during the summer resulted in a decrease of the A. flos-aquae population density. It was revealed that high temperatures (20-25 °C) are suitable for maintaining A. flos-aquae var. klebahnii strains isolated from the study ponds, implying that low-temperature-adapted A. flos-aquae can grow over a wide range of water temperatures. The high-temperatureadapted A. flos-aquae var. klebahnii co-existed with M. aeruginosa during summer; however, its peak population density was significantly lower than those in previous years when M. aeruginosa was absent. Overall, analytical results imply a possible adverse impact of the existence of other cyanoprokaryotes, such as Anabaena and Microcystis, on both varieties of A. flos-aquae; however, its mechanism remains unknown. Nutrient concentrations and pH had no clear impact on the population density of A. flos-aquae. Based on these observations, progress of eutrophication and absence of other cyanoprokaryotes are likely the key factors determining the future expansion of A. flos-aquae.
Contribution of bioturbation by the red swamp crayfish Procambarus clarkii to the recruitment of bloom-forming cyanobacteria from sediment
Yoshimasa YAMAMOTO
Journal of Limnology , 2010, DOI: 10.4081/jlimnol.2010.102
Abstract: The development of cyanobacterial blooms in a small eutrophic pond was monitored along with the potential effect of bioturbation by the red swamp crayfish Procambarus clarkii discussed as well with respect to the recruitment of cyanobacteria from sediment. Cyanobacterial blooms were observed during the early spring and summer. The spring bloom was dominated by Aphanizomenon flos-aquae. Its population density reached the maximum level in late March, thereafter decreasing rapidly and becoming lower than the detection limit from May. When the water temperature exceeded 20 °C in late May, the population density of Microcystis spp. began to increase, and a bloom was formed from July to early August. Anabaena spp. also contributed to the formation of the summer bloom. The population densities of both Microcystis spp. and Anabaena spp. began to decline in mid August. Crayfish were sampled using baited traps from April to November. No sample was obtained in April, whereas crayfish were captured constantly from May to November. They were distributed widely throughout the pond from June, although a large number of crayfish were captured most effectively at a particular point in the pond. The first captures in late May were dominated by males. The sex ratio of the captures was almost 1:1 from June to September, and fell in favor of females from October. The sex ratio reached a minimum (0.2:1) in mid November, when an extremely large number of crayfish were captured at a distinctly warm point. Next, the potential ability of crayfish to promote the recruitment of cyanobacteria from the sediment was examined by performing an incubation experiment. The presence of crayfish in containers of the pond sediment increased the densities of cyanobacteria such as Microcystis spp. and Anabaena spp. However, population densities of cyanobacteria began to decline after the crayfish was removed. Overall, bioturbation by crayfish seemed to be somewhat important in the dynamics of cyanobacterial blooms in the study pond; in addition, their effect varied with sex and season. Males may play an active role in the initiation of the bloom in late spring. Conversely, females may contribute to the extension of bloom in late autumn. Both males and females contribute equally to the maintenance of the bloom from summer to autumn.
Soliton and Periodic solutions of the Short Pulse Model Equation
Yoshimasa Matsuno
Physics , 2009,
Abstract: The short pulse (SP) equation is a novel model equation describing the propagation of ultra-short optical pulses in nonlinear media. This article reviews some recent results about the SP equation. In particular, we focus our attention on its exact solutions. By using a newly developed method of solution, we derive multisoliton solutions as well as 1-and 2-phase periodic solutions and investigate their properties.
The Peakon Limit of the N-Soliton Solution of the Camassa-Holm Equation
Yoshimasa Matsuno
Physics , 2007,
Abstract: We show that the analytic N-soliton solution of the Camassa-Holm (CH) shallow-water model equation converges to the nonanalytic N-peakon solution of the dispersionless CH equation when the dispersion parameter tends to zero. To demonstrate this, we develop a novel limiting procedure and apply it to the parametric representation for the N-soliton solution of the CH equaiton. In the process, we use Jacobi's formula for determinants as well as various identities among the Hankel determinants to facilitate the asymptotic analysis. We also provide a new representation of the N-peakon solution in terms of the Hankel determinants.
Model study of the sign problem in a mean-field approximation
Yoshimasa Hidaka
Physics , 2007,
Abstract: We study the sign problem of the fermion determinant at nonzero baryon chemical potential. For this purpose we apply a simple model derived from Quantum Chromodynamics, in the limit of large chemical potential and mass. For SU(2) color, there is no sign problem and the mean-field approximation is similar to data from the lattice. For SU(3) color the sign problem is unavoidable, even in a mean-field approximation. We apply a phase-reweighting method, combined with the mean-field approximation, to estimate thermodynamic quantities. We also investigate the mean-field free energy using a saddle-point approximation.
A direct method for solving the generalized sine-Gordon equation
Yoshimasa Matsuno
Physics , 2010, DOI: 10.1088/1751-8113/43/10/105204
Abstract: The generalized sine-Gordon (sG) equation was derived as an integrable generalization of the sG equation. In this paper, we develop a direct method for solving the generalized sG equation without recourse to the inverse scattering method. In particular, we construct multisoliton solutions in the form of parametric representation. We obtain a variety of solutions which include kinks, loop solitons and breathers. The properties of these olutions are investigated in detail. We find a novel type of solitons with a peculiar structure that the smaller soliton travels faster than the larger soliton. We also show that the short pulse equation describing the propagation of ultra-short pulses is reduced from the generalized sG equation in an appropriate scaling limit. Subsequently, the reduction to the sG equation is briefly discussed.
Periodic solutions of a resistive model for nonlocal Josephson dynamics
Yoshimasa Matsuno
Physics , 2008, DOI: 10.1088/1751-8113/42/2/025401
Abstract: A novel method is developed for constructing periodic solutions of a model equation describing nonlocal Josephson electrodynamics. This method consists of reducing the equation to a system of linear ordinary differential equations through a sequence of nonlinear transformations. The periodic solutions are then obtained by a standard procedure which are represented in terms of trigonometric functions. It is found that the large time asymptotic of the solution exhibits a steady profile which does not depend on initial conditions.
Classical-Information Theoretical View of Physical Measurements and Generalized Uncertainty Relations
Yoshimasa Kurihara
Physics , 2012,
Abstract: General characterization of physical measurements is discussed within the framework of a classical information theory. Uncertainty relation for simultaneous measurements of two physical observables is defined in this framework for generalized dynamic systems controlled under general kinds of equations of motion. We have treated only a mean-square error of the Gauss(-like) distributions in this report. Lessening of the Kennard-Robertson type uncertainties due to boundary conditions are quantitatively discussed using the information entropy.
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