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Fukuoka-shi, Japan

Chikushi Jogakuen University is a private women's college in Dazaifu, Fukuoka, Japan, established in 1988. Wikipedia.

Ichinose M.,Chikushi Jogakuen University | Iizuka M.,Kyushu Dental College | Kusumi J.,Kyushu University | Takefu M.,Saga University
Journal of Theoretical Biology | Year: 2013

Compensatory mutations are individually deleterious but appropriate combinations of mutants are harmless. For several models of compensatory molecular evolution, we consider the effects of back mutation. It is shown that the effects of back mutation on the rate of compensatory molecular evolution are weak. Further we estimate the values of selection parameter of deleterious single mutants for the models of compensatory molecular evolution both with and without back mutation using sequence data of folded RNA molecules and compare them with the previous results. © 2013 Elsevier Ltd. Source

Tokimatsu K.,Japan National Institute of Advanced Industrial Science and Technology | Tokimatsu K.,Tokyo Institute of Technology | Aicha M.,Systems Research Center Co. | Yoshida K.,Nagasaki University | And 5 more authors.
International Journal of Sustainable Development and World Ecology | Year: 2016

We need a consistent methodology to measure the co-benefits of climate change mitigation across Asian countries. This study chose a strategy of modifying the Japan-specific life-cycle impact assessment method based on endpoint modeling (LIME) for wider application across countries. LIME has two dimensions. First, it is an environmental science that links the cause-and-effect chain. Second, it is an environmental valuation that weighs four endpoint damages in monetary terms through a conjoint analysis that is derived from an Internet-based questionnaire survey. This article describes the modification of the methodology for application of the conjoint analysis to weigh environmental impacts. We approached the investigation as follows. First, we conducted Internet surveys to measure marginal willingness-to-pay (MWTP). We used a sample of 112 respondents in their 20 s to 40 s, divided equally between men and women, in 11 cities across China, India, and Southeast Asia. The results obtained showed clear statistical significance and were comparable across the cities. Second, we attempted to develop functions (called benefit transfer functions) to simplify the measured MWTP in order to apply it across different Asian countries. The functions were derived through a stepwise meta-analytic method, a type of multiple regression analysis whose independent variable was MWTP and dependent variables were attributes of both respondents and surveyed cities. The functions showed that coal consumption and percentage of nature reserve were dependent variables. Then, the MWTPs estimated from the functions were compared with the measured MWTP for transfer error, which is calculated by the absolute value of the difference between the estimated value and the measured value divided by the latter. The transfer error was below 50% in about 90% of the 44 results (a combination of four endpoints and 11 cities), implying that the developed functions were statistically significant. © 2016 Informa UK Limited, trading as Taylor & Francis Group Source

Ohmori M.,Chikushi Jogakuen University | Okamura K.,Kyushu University
International Conference on Information Networking 2011, ICOIN 2011 | Year: 2011

Generally speaking, APs of existing IEEE 802.11 wireless LAN system may be always turned on in many cases even though no STA is present. Such APs may consume unnecessary electricity and that means electricity consumption. In this paper, we propose "Green Wireless LAN System", which reduces electricity consumption by automatically turning on or off APs in accordance with presences of STAs. In the system, we propose how to detect presences of STAs, how to authenticate and authorize STAs and how to turn on or off an AP in order to maximize electricity conservation. Also, we implement the proposed system. Then, we experiment on it in order to clarify how long it takes that an STA associate with an AP and what cause its delay. In addition, we measure how much electricity APs consumes in the system. Finally, we simulate how much electricity consumption the proposed system can reduce based upon results of experiments and actual usages of the existing wireless LAN System. ©2011 IEEE. Source

Rosli M.K.A.,National University of Malaysia | Syed-Shabthar S.M.F.,National University of Malaysia | Abdul-Patah P.,Km 10 | Abdul-Samad Z.,National University of Malaysia | And 9 more authors.
The Scientific World Journal | Year: 2014

Three species of otter can be found throughout Malay Peninsula: Aonyx cinereus, Lutra sumatrana, and Lutrogale perspicillata. In this study, we focused on the A. cinereus population that ranges from the southern and the east coast to the northern regions of Malay Peninsula up to southern Thailand to review the relationships between the populations based on the mitochondrial D-loop region. Forty-eight samples from six populations were recognized as Johor, Perak, Terengganu, Kelantan, Ranong, and Thale Noi. Among the 48 samples, 33 were identified as A. cinereus, seven as L. sumatrana, and eight as L. perspicillata. Phylogenetically, two subclades formed for A. cinereus. The first subclade grouped all Malay Peninsula samples except for samples from Kelantan, and the second subclade grouped Kelantan samples with Thai sample. Genetic distance analysis supported the close relationships between Thai and Kelantan samples compared to the samples from Terengganu and the other Malaysian states. A minimum-spanning network showed that Kelantan and Thailand formed a haplogroup distinct from the other populations. Our results show that Thai subspecies A. cinereus may have migrated to Kelantan from Thai mainland. We also suggest the classification of a new subspecies from Malay Peninsula, the small-clawed otter named A. cinereus kecilensis. © 2014 M. K. A. Rosli et al. Source

Rosli M.K.,National University of Malaysia | Abdul-Patah P.,National University of Malaysia | Syed-Shabthar S.M.F.,National University of Malaysia | Burhanuddin M.N.,Km 10 | And 3 more authors.
Journal of Animal and Plant Sciences | Year: 2015

Aonyx cinereus, Lutrogale perspicillata and Lutra sumatrana are three species of the Old World Otter that can be found in Peninsular Malaysia. The main objective of this research was to determine the phylogenetic relationships among these three otter genera using 401 bp DNA sequences of the D-loop region. Tree topologies were reconstructed using the Neighbor-Joining (NJ) and the Maximum Parsimony (MP) methods. Both NJ and MP trees showed that the three Otter species (A. cinereus, L. perspicillata, and L. sumatrana) formed their own monophyletic clade. The results also showed that L. perspicillata and A. cinereus were sister clades and closely related, which is supported by the bootstrap values of 85% (NJ) and 84% (MP). The two species also had a close genetic distance value of 0.031.The clades, consisting of both A.cinereus and L. perspicillata, were formed in a distinct group from L. sumatrana, which was found to be grouped with L. perspicillata in previous morphological studies. The independent monophyletic clade of L. sumatrana was supported by high bootstrap values. These results imply that L. perspicillata does not belong to the same group as L. sumatrana which has been concluded in several previous molecular studies. © 2015, Pakistan Agricultural Scientists Forum. All right reserved. Source

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