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Fukuoka, Japan

The University of Kitakyushu is a public university in Kitakyushu, Japan. The main campus is located next to Keibajomae station on the Kitakyushu monorail. The second campus is in the academic zone of Wakamatsu-ku, Kitakyushu called Gakujutsu Kenkyu Toshi . The university was originally founded as a language academy in 1946 to help with communication with the nearby American base at what is now called Yamada Ryokuchi. Wikipedia.

Yoshida Y.,University of Kitakyushu
International Journal of Uncertainty, Fuzziness and Knowlege-Based Systems | Year: 2011

In this paper, the weighted quasi-arithmetic means are discussed from the viewpoint of utility functions and downward risks in economics. Representing the weighting functions by probability density functions and the conditional expectations, an index for downward risks in stochastic environments is derived. This paper discusses the relation among the index, the first-order stochastic dominance and the risk premium in economics, and further it investigates the relation between the index and value-at-risks which are known as another estimation for downward risks in finance. Finally, this paper shows a lot of examples of the weighted quasi-arithmetic mean and the aggregated mean ratio for various typical utility functions with various typical utility functions and probability density functions. © 2011 World Scientific Publishing Company.

Nakamura H.,Global Strategies Group | Kato T.,University of Kitakyushu
Environmental Science and Policy | Year: 2013

This study uses an experimental social survey in two large Japanese cities to explore citizens' attitudes toward international voluntary carbon offsetting that encourages low carbon development in developing countries. In particular, the study focuses on whether the offsetting is a contribution to meet national target of greenhouse gas (GHG) emissions reduction under the Kyoto Protocol or reduction beyond the national target, using Kyoto credits generated from climate change mitigation projects in developing countries. The study finds that around 40% of the survey respondents chose real carbon offsetting over a gift certificate as compensation for their participation in the survey, around half of whom chose carbon offsetting contribution to the world. However, most of the current Japanese carbon offsetting providers utilise only the carbon offsetting contribution to the Japanese government. Thus, Japanese citizens have significant untapped potential for undertaking more carbon offsetting to meet targets other than national targets. However, the results also show that there is a general lack of understanding regarding the mechanism of carbon offsetting. Carbon offsetting providers in Japan and other countries that may have national self-imposed targets and allowing the usage of international carbon offsetting should therefore be considered, so as to provide individuals with the options of either contributing to their government to help it meet its national target or contributing to the world to help reduce GHG emissions beyond the national targets. © 2012 Elsevier Ltd.

Kawano T.,University of Kitakyushu
Medical Hypotheses | Year: 2011

Novel catalytic peptides highly active in conversion of hydrogen peroxide to superoxide are newly designed and proposed as novel probes for assessing the cellular protein phosphorylation/dephosphorylation events possibly available for future clinical applications. One of model peptide was invented by fusing the copper-binding catalytic peptide and Erk1/2 MAP kinase kinase substrate peptide. In order to demonstrate that this type of probes is phosphorylation-sensitive, preliminary data was obtained with non-phosphorylated and phosphorylated peptides at two phosphorylation sites, namely, threonine and tyrosine residues. As expected, model phosphorylations effectively lowered the catalytic activity of the peptide. This is the first implication that phosphorylation-controllable enzyme mimics could be artificially invented. In addition, the author propose a possible application of this type of peptides as the tools or components for constructing a simplified in vitro signaling system processing the phosphorylation signals into the oxidative signals possibly affecting the fate of the living cells. © 2011 Elsevier Ltd.

Hirano T.,University of Kitakyushu
International Journal of Environmental Research and Public Health | Year: 2011

To examine the effects of alcohol consumption on cancer risk, we measured oxidative DNA damage and its repair activity in the livers and esophagi of rats fed with ethanol. Using our previously designed protocol for feeding rats with a high concentration of ethanol, we examined the effects of ethanol consumption on 8-oxo-Gua generation and repair activity in the livers and esophagi of rats. We found that a high concentration of ethanol accompanied with a vitamin-depleted diet increased 8-oxo-Gua and its repair activity. 8-Oxo-Gua is known to induce point mutations, leading to carcinogenesis. Therefore, these results suggested that a high concentration of ethanol and an irregular diet increased liver and esophageal cancer risk. On the other hand, we showed that a low concentration of ethanol decreased 8-oxo-Gua and its repair activity in the livers of mice treated with a carcinogen. Taken together, the effects of ethanol consumption on cancer risk depend on the ethanol concentration and the diet pattern. © 2011 by the authors.

Yoshida Y.,University of Kitakyushu
Soft Computing | Year: 2010

In this paper we deal with weighted quasi-arithmetic means of an interval using utility functions in decision making. The mean values are discussed from the viewpoint of weighted aggregation operators, and they are given as weighted aggregated values of each point in the interval. The properties of the weighted quasi-arithmetic mean and its translation invariance are investigated. For the application in economics, we demonstrate the decision maker's attitude based on his utility by the weighted quasi-arithmetic mean and the aggregated mean ratio. Several examples of the weighted quasi-arithmetic mean and the aggregated mean ratio for various typical utility functions are shown to understand our motivation and for the applications in decision making. © 2009 Springer-Verlag.

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