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Kusatsu, Japan

Ritsumeikan University is a private university in Kyoto, Japan, tracing its roots to 1869. With the Kinugasa Campus in Kyoto, and Kyoto Prefecture. the university also has a satellite called Biwako-Kusatsu Campus .Today, the university is known as one of the four leading private universities in western Japan. KAN-KAN-DO-RITS 関関同立 is the abbreviation that many people refer to when talking about the four leading private universities in the region . The school is one of the top universities in Japan, and it is especially well known for its International Relations programme which has been ranked as first place in Japan. Moreover, in today’s newspaper, it is listed as the ‘top private university in Japan for policy science’. It has exchange programmes with many schools throughout the world, including The University of British Columbia, The University of Melbourne, The University of Sydney, University of Hong Kong and King's College London. The school also has a dual bachelor's degree program and dual masters' degree programme offered in collaboration with American University, and a dual bachelor's degree programme offered in collaboration with The University of British Columbia. It has a relatively strong network of alumni in Kansai region and has produced a number of CEOs in Japanese companies as well as politicians.Ritsumeikan University Panthers is a very strong collegiate football team in Japan and won three national champions, seven collegiate champions, and nine conference champions. Wikipedia.

Yoshikawa T.,Ritsumeikan University
Annual Reviews in Control | Year: 2010

Robot hands have been one of the major research topics since the beginning of robotics because grasping and manipulation of a variety of objects by robot hands are fundamental functionalities of various robotic systems. This paper presents a survey on the current state of research on control of grasping and manipulation by multifingered robot hands. After a brief history of the hardware development of multifingered robot hands, representative theoretical research results are presented in the area of grasping and manipulation. Regarding grasping, basic analytical concepts including force/form closures and active/passive closures are explained and various grasp quality measures for grasping position optimization are introduced. Regarding manipulation, the hybrid position/force control method and impedance control method are presented. Some of our recent results on grasping and manipulation by a soft-fingered hand are also presented. Finally, some future research directions are discussed. © 2010 Elsevier Ltd. All rights reserved. Source

Physical Review Letters | Year: 2012

The molecular and cellular basis of left-right asymmetry in plant morphogenesis is a fundamental issue in biology. A rapidly elongating root or hypocotyl of twisting mutants of Arabidopsis thaliana exhibits a helical growth with a handedness opposite to that of the underlying cortical microtubule arrays in epidermal cells. However, how such a hierarchical helical order emerges is currently unknown. We propose a model for investigating macroscopic chiral asymmetry in Arabidopsis mutants. Our elastic model suggests that the helical pattern observed is a direct consequence of the simultaneous presence of anisotropic growth and tilting of cortical microtubule arrays. We predict that the root helical pitch angle is a function of the microtubule helical angle and elastic moduli of the tissues. The proposed model is versatile and is potentially important for other biological systems ranging from protein fibrous structures to tree trunks. © 2012 American Physical Society. Source

Fukuyama T.,Ritsumeikan University
International Journal of Modern Physics A | Year: 2012

This is a theoretical review of exploration of new physics beyond the Standard Model (SM) in the electric dipole moment (EDM) in elementary particles, atoms and molecule. EDM is a very important CP violating phenomenon and sensitive to new physics. Starting with the estimations of EDM of quarksleptons in SM, we explore new signals beyond SM. However, these works drive us to wider frontiers where we search fundamental physics using atoms and molecules and vice versa. Paramagnetic atoms and molecules have great enhancement factor on electron EDM. Diamagnetic atoms and molecules are very sensitive to nuclear P and T odd processes. Thus EDM becomes the keyword not only of New Physics but also of unprecedented fruitful collaborations among particle, atomic and molecular physics. This review intends to help such collaborations over a wide range of physicists. © 2012 World Scientific Publishing Company. Source

Fukuyama T.,Ritsumeikan University
International Journal of Modern Physics A | Year: 2013

We review SO(10) grand unified theories (GUTs) in four and five dimensions (4D and 5D). The renormalizable minimal SO(10) SUSY GUT is the central theme of this paper. It is very predictive and makes it possible to construct all mass matrices including those of the Dirac and heavy right-handed Majorana neutrinos. Its predictions covers all ranges of particle phenomena. The explicit construction of the Higgs superpotential and the explicit display of a symmetry breaking pattern from GUT to the SM show that the naive desert from the SM to GUT in the minimal supersymmetric standard model (MSSM) is a too simplified concept and we have many definitely determined intermediate energy scales in general. This situation destroys the naive gauge coupling unification in the MSSM scheme. Also the precise measurements of neutrino oscillation data have revealed several small but manifest mismatches with our predictions. Also there are arguments that it is impossible to construct a GUT theory in 4D with a finite number of multiplets that leads to the MSSM with a residual R symmetry. If we try to solve all these pathologies comprehensively, it is very attractive for us to go into extra dimensions. Extra dimension may be either warped or flat. The fifth dimension, for simplicity, is compactified on the S 1/(Z2) (warped) or on the S1/(Z 2×Z′2) (flat) orbifold with two inequivalent branes at the orbifold fixed points. In the former warped case, intermediate energy scales are translated with the positions of Higgs fields in the bulk and the fundamental scheme of the MSSM is recovered. On the other hand, in the latter flat scenario, all matter and Higgs multiplets reside on the Pati-Salam (PS) brane where the PS symmetry is manifest. There the original renormalizability in Yukawa coupling is broken but its essential structures of mass matrices in minimal SO(10) GUT in 4D is promoted to the PS invariant action in 4D. In the gaugino mediation mechanism, the SO(10) gauge multiplet is transmitted to the PS brane through the gaugino mediation with bulk gauge multiplet. Further breaking of the PS gauge group to the SM group is realized by VEVs of the Higgs multiplets $({\bf 4}, {\bf 1}, {\bf 2}) \oplus (\bar{\bf{4}}, {\bf 1}, {\bf 2})$. We show that this model not only cures all pathologies in SO(10) GUT in 4D but also provides the consistent inflation scenario and dark matter candidate and leptogenesis. The gauge coupling unification is successfully realized after incorporating the threshold corrections of the Kaluza-Klein modes. Finally we add some comments on the impacts of the discovery of a Higgs-like particle by the Large Hadronic Collider at CERN (LHC) on SUSY GUTs. © 2013 World Scientific Publishing Company. Source

Maeda H.,Ritsumeikan University
Bulletin of the Chemical Society of Japan | Year: 2013

This article summarizes the supramolecular chemistry of pyrrole-based π-conjugated molecules, with specific focus on the work carried out by the author's group over the last nine years. The author provides a number of examples of supramolecular assemblies and functional materials comprising pyrrole-based molecules stabilized by noncovalent interactions such as metal coordination, hydrogen bonding, π-π stacking, and van der Waals forces. In particular, pyrrolebased π-conjugated molecules showed anion-binding behavior, and formed ion-based materials, wherein positively and negatively charged species were arranged in an ordered form by combination with appropriate cations. © 2013 The Chemical Society of Japan. Source

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