Hiroshima-shi, Japan

Hiroshima Shudo University

Hiroshima-shi, Japan

Hiroshima Shudo University is a private university in Hiroshima, Hiroshima, Japan. The predecessor of the school, Hiroshima Domain's Han school, was founded in 1725. It was chartered as a junior college in 1952 and became a four-year college in 1960. The school adopted the present name in 1973. It was announced in March 2013 that Shudo Gakuen, the educational corporation behind the university, would merge in April 2015 with Suzugamine Gakuen, the educational corporation behind Suzugamine Women's College. Wikipedia.

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Inagaki T.,Hiroshima University | Kimura D.,Hiroshima Shudo University | Kohyama H.,Academia Sinica, Taiwan | Kohyama H.,National Center for Theoretical science | And 2 more authors.
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2011

The Nambu-Jona-Lasinio model with a Kobayashi-Maskawa-'t Hooft term is one low energy effective theory of QCD which includes the UA(1) anomaly. We investigate nonet meson properties in this model with three flavors of quarks. We employ two types of regularizations, the dimensional and sharp cutoff ones. The model parameters are fixed phenomenologically for each regularization. Evaluating the kaon decay constant, the η meson mass and the topological susceptibility, we show the regularization dependence of the results and discuss the applicability of the Nambu-Jona-Lasinio model. © 2011 American Physical Society.

The main purpose of this paper is to review and compare E-waste management systems operating in East Asian countries in efforts to identify future challenges facing the circulative economies in the region. The first topic of this paper is cost sharing (physical and financial) as applied to the various stakeholders, including producers, consumers, local governments and recyclers, in the E-waste management systems. The second topic is the environmental and economical impacts of these E-waste management systems on recycling technology, trans-boundary movement of E-wastes and Design for Environment (DfE). The final topic is the possibility for international cooperation in the region in terms of E-waste management systems. The authors' preliminary result is that the E-waste management systems operating in these East Asian countries have contributed to extended producer responsibility and DfE to some extent, but many challenges remain in their improvement through proper cost sharing among the stakeholders. It is also clear that the cross-border transfer of E-wastes cannot be resolved by one nation alone, and thus international cooperation will be indispensable in finding a suitable solution. © 2010 by the authors.

Ogata T.,Waseda University | Ogata T.,Hiroshima Shudo University | Oishi Y.,Kumamoto University | Higuchi M.,Waseda University | Muraoka I.,Waseda University
Biochemical and Biophysical Research Communications | Year: 2010

This study investigated regulation of autophagy in slow-twitch soleus and fast-twitch plantaris muscles in fasting-related atrophy. Male Fischer-344 rats were subjected to fasting for 1, 2, or 3 days. Greater weight loss was observed in plantaris muscle than in soleus muscle in response to fasting. Western blot analysis demonstrated that LC3-II, a marker protein for macroautophagy, was expressed at a notably higher level in plantaris than in soleus muscle, and that the expression level was fasting duration-dependent. To identify factors related to LC3-II enhancement, autophagy-related signals were examined in both types of muscle. Phosphorylated mTOR was reduced in plantaris but not in soleus muscle. FOXO3a and ER stress signals were unchanged in both muscle types during fasting. These findings suggest that preferential atrophy of fast-twitch muscle is associated with induction of autophagy during fasting and that differences in autophagy regulation are attributable to differential signal regulation in soleus and plantaris muscle. © 2010 Elsevier Inc. All rights reserved.

Takahama T.,Hiroshima City University | Sakai S.,Hiroshima Shudo University
2013 IEEE Congress on Evolutionary Computation, CEC 2013 | Year: 2013

We have proposed to utilize a rough approximation model, which is an approximation model with low accuracy and without learning process, to reduce the number of function evaluations in unconstrained optimization. Although the approximation errors between the true function values and the approximation values estimated by the rough approximation model are not small, the rough model can estimate the order relation of two points with fair accuracy. In order to use this nature of the rough model, we have proposed estimated comparison which omits the function evaluations when the result of the comparison can be judged by approximation values. In this study, we propose to utilize the estimated comparison in constrained optimization and propose the εDEkr, which is the combination of the ε constrained method and the estimated comparison using kernel regression. The εDEkr is a very efficient constrained optimization algorithm that can find high-quality solutions in a very small number of function evaluations. It is shown that the εDEkr can find near optimal solutions stably in a very small number of function evaluations compared with various other methods on well-known nonlinear constrained problems. © 2013 IEEE.

Takahama T.,Hiroshima City University | Sakai S.,Hiroshima Shudo University
IEEE International Conference on Fuzzy Systems | Year: 2011

Differential Evolution (DE) is a newly proposed evolutionary algorithm. DE is a stochastic direct search method using a population or multiple search points. DE has been successfully applied to optimization problems including nonlinear, non-differentiable, non-convex and multimodal functions. However, the performance of DE degrades in problems having strong dependence among variables, where variables are related strongly to each other. In this study, we propose to utilize partition entropy given by fuzzy clustering for solving the degradation. It is thought that a directional search is desirable when search points are distributed with bias. Thus, when the entropy is low, algorithm parameters can be controlled to make the directional search. Also, we propose to use a species-best strategy for improving the efficiency and the robustness of DE. The effect of the proposed method is shown by solving some benchmark problems. © 2011 IEEE.

Zhou X.,Institute for Global Environmental Strategies | Yano T.,Hiroshima Shudo University | Kojima S.,Institute for Global Environmental Strategies
Energy Policy | Year: 2013

In this paper we pointed out a hidden inequality in accounting for trade-related emissions in the presence of border carbon adjustment. Under a domestic carbon pricing policy, producers pay for the carbon costs in exchange for the right to emit. Under border carbon adjustment, however, the exporting country pays for the carbon costs of their exports to the importing country but not be given any emission credits. As a result, export-related emissions will be remained in the national inventory of the exporting country based on the UNFCCC inventory approach. This hidden inequality is important to climate policy but has not yet been pointed out. To address this issue we propose a method of National Inventory Adjustment for Trade, by which export-related emissions will be deducted from the national inventory of the exporting country and added to the national inventory of the importing country which implements border carbon adjustment. To assess the policy impacts, we simulated a carbon tax policy with border tax adjustment for Japan using a multi-region computable general equilibrium model. The results indicate that with the National Inventory Adjustment for Trade, both Japan's national inventory and the carbon leakage effects of Japan's climate policy will be greatly different. © 2013 Elsevier Ltd.

Iwata H.,Fukuoka Institute of Technology | Okada K.,Hiroshima Shudo University
Environmental Economics and Policy Studies | Year: 2014

Our study empirically investigates the effects of the Kyoto Protocol’s quantified emission limitation or reduction commitments on various greenhouse gas (GHG) emissions such as carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and other greenhouse gases consisting of hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), and sulfur hexafluoride (SF6). These GHG emissions are considered to be the main source of global warming issues, and 39 countries approved to meet the commitments by ratifying the Kyoto Protocol. Our empirical analysis is based on the Stochastic Impacts by Regression on Population, Affluence, and Technology (STIRPAT) model, the stochastic version of the IPAT model, using the data of 119 countries from 1990 to 2005. Our main findings are that the effects of the commitments to the Kyoto Protocol are (1) significantly negative for the cases of CO2and CH4emissions, (2) not significant for the case of N2O emissions, and (3) significantly positive for the case of other greenhouse gas emissions. These results have important policy implications for global warming issues. © 2012, Springer.

RNA played a central role in the emergence of the first life-like system on primitive Earth since RNA molecules contain both genetic information and catalytic activity. However, there are several drawbacks regarding the RNA world hypothesis. Here, I briefly discuss the feasibility of the RNA world hypothesis to deduce the RNA functions that are essential for forming a life-like system. At the same time, I have conducted a conceptual analysis of the characteristics of biosystems as a useful approach to deduce a realistic life-like system in relation to the definition of life. For instance, an RNA-based life-like system should possess enough stability to resist environmental perturbations, by developing a cell-like compartment, for instance. Here, a conceptual viewpoint is summarized to provide a realistic life-like system that is compatible with the primitive Earth environment and the capabilities of RNA molecules. According to the empirical and conceptual analysis, I propose the hypothesis that the first life-like system could have initiated from only two genes. © 2016 by the authors; licensee MDPI, Basel, Switzerland.

Hiraki S.,Hiroshima Shudo University
Journal of Japan Industrial Management Association | Year: 2010

When determining the sequence of a mixed-model assembly line, the following two objectives are usually considered: (1) leveling the load (total assembly time) for each process within the assembly line, and (2) maintaining a constant rate of use of each part in the line. For the first objective, we usually determine the sequence that minimizes maximum work congestion. For the second objective, a sequence is selected in which the quantity used per hour (i.e. consumption speed) of each part in the mixed-model assembly line is kept as constant as possible. Some studies have considered these two objectives simultaneously. In this paper, from the standpoint of supply chain management (SCM), we propose a new sequencing method that considers not only the two aforementioned traditional objectives, but also a third objective, that is, shortening the delivery time to a dealer when the final products are delivered by car-carriers. We propose an approach utilizing a two-stage sequencing method. In Stage 1, to maintain a constant rate of parts usage and meet the date of delivery, we divide the production period into shorter periods, and determine the production volume of each product for each period. Next, in Stage 2, we establish a production schedule for each divided period that realizes smoother production in the assembly line. We display numerical examples to explain and clarify the effectiveness of the proposed sequencing procedure.

Kawamura K.,Hiroshima Shudo University
Biochimie | Year: 2012

Following the discovery of ribozymes, the "RNA world" hypothesis has become the most accepted hypothesis concerning the origin of life and genetic information. However, this hypothesis has several drawbacks. Verification of the hypothesis from different viewpoints led us to proposals from the viewpoint of the hydrothermal origin of life, solubility of RNA and related biopolymers, and the possibility of creating an evolutionary system comparable to the in vitro selection technique for functional RNA molecules based on molecular biology. © 2011 Elsevier Masson SAS. All rights reserved.

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