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Tokyo, Japan

Seikei University is a private university in the Kichijōji neighborhood of the city of Musashino, Tokyo, Japan. Its name derives from a passage in the Records of the Grand Historian by Sima Qian. Its campus is noted for its rows of zelkova trees. Wikipedia.


Shinmura S.,Seikei University
Statistics, Optimization and Information Computing | Year: 2016

The discriminant analysis is not the inferential statistics since there are no equations for standard error (SE) of error rate and discriminant coefficient based on the normal distribution. In this paper, we proposed the "k-fold cross validation for small sample" and can obtain the 95% confidence interval (CI) of error rates and discriminant coefficients. This method is the computer-intensive approach by statistical and mathematical programming (MP) software such as JMP and LINGO. By the proposed approach, we can choose the best model with the minimum mean of error rate in the validation samples (Minimum M2 Standard). In this research, we examine the sixteen linear separable models of Swiss banknote data by eight linear discriminant functions (LDFs). M2 of the best model of Revised IP-OLDF is the smallest value of all models. We find all coefficients of six Revised IP-OLDF among sixteen models rejected by the 95% CI of discriminant coefficients (Discriminant coefficient standard). We compare t-values of the discriminant scores. The t-value of the best model has the maximum values among sixteen models (Maximum t-value Standard). Moreover, we can conclude that all standards support the best model of Revised IP-OLDF. © 2016 International Academic Press. Source


Takao K.,Seikei University | Bell T.J.,Tokyo Institute of Technology | Ikeda Y.,Tokyo Institute of Technology
Inorganic Chemistry | Year: 2013

This Forum Article provides an overview of the reported studies on the actinide chemistry in ionic liquids (ILs) with a particular focus on several fundamental chemical aspects: (i) complex formation, (ii) electrochemistry, and (iii) extraction behavior. The majority of investigations have been dedicated to uranium, especially for the 6+ oxidation state (UO2 2+), because the chemistry of uranium in ordinary solvents has been well investigated and uranium is the most abundant element in the actual nuclear fuel cycles. Other actinides such as thorium, neptunium, plutonium, americium, and curiumm, although less studied, are also of importance in fully understanding the nuclear fuel engineering process and the safe geological disposal of radioactive wastes. © 2012 American Chemical Society. Source


We propose a systematic procedure for extracting gauge invariant and gauge fixed actions for various higher-spin gauge field theories from covariant bosonic open string field theory. By identifying minimal gauge invariant part for the original free string field theory action, we explicitly construct a class of covariantly gauge fixed actions with BRST and anti-BRST invariance. By expanding the actions with respect to the level N of string states, the actions for various massive fields including higher-spin fields are systematically obtained. As illustrating examples, we explicitly investigate the level N≤3 part and obtain the consistent actions for massive graviton field, massive 3rd rank symmetric tensor field, or anti-symmetric field. We also investigate the tensionless limit of the actions and explicitly derive the gauge invariant and gauge fixed actions for general rank n symmetric and anti-symmetric tensor fields. © 2012 Elsevier B.V. Source


Asano M.,Seikei University | Kato M.,University of Tokyo
Nuclear Physics B | Year: 2013

We propose a new gauge field theory which is an extension of ordinary string field theory by assembling multiple state spaces of the bosonic string. The theory includes higher-spin fields in its massless spectrum together with the infinite tower of massive fields. From the theory, we can easily extract the minimal gauge-invariant quadratic action for tensor fields with any symmetry. As examples, we explicitly derive the gauge-invariant actions for some simple mixed symmetric tensor fields. We also construct covariantly gauge-fixed action by extending the method developed for string field theory. © 2013 Elsevier B.V. Source


Enokido T.,Rissho University | Takizawa M.,Seikei University
IEEE Transactions on Industrial Electronics | Year: 2011

Cyber engineering is getting more significant in not only manufacturing but also business applications. Information management technologies play a key role in cyber engineering. In order to realize the cyber engineering, objects in information systems are required to be not only secure but also consistent in the presence of security threats and multiple conflicting transactions. There are so far many discussions on each of the security management and concurrence control. However, there is no discussion on synchronization mechanisms to realize both of them. In this paper, we discuss a novel synchronization protocol to make an information system not only secure but also consistent. In the role-based access control model, authorized access requests are specified in roles which are collections of access rights. A transaction issued by a subject is assigned with a subfamily of the roles granted to the subjects, which are named purpose. We first define legal information flow relations among purposes. Based on the legal information flow relations, we discuss a purpose-marking (PM) protocol to prevent illegal information flow to occur by performing conflicting transactions in a serializable way. We evaluate the PM protocol in terms of the number of transactions to be aborted. © 2010 IEEE. Source

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