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T. Matsushita,M.J. Goh,M. Kyotani,K. Akagi 한국물리학회 2006 Current Applied Physics Vol.6 No.5
Polyacetylene lms with vertically aligned bril morphology were synthesized in homeotropic nematic LC (N-LC) solvent, byusing a magnetic eld of 5 T as an external perturbation. Next, helical polyacetylene lms with vertically aligned and screwed brilmorphology were synthesized in macroscopically aligned chiral nematic LC (N.-LC) under magnetic eld. Scanning electron micro-graph (SEM) indicated that the lengths of brils from the substrate were 520l m, depending on polymerization time, acetylenepressure and catalyst concentration.
Mechatronics Education Using Robot Competition in Okayama University of Science
T. Akagi,S. Fujimoto,H. Kuno,K. Araki,S. Yamada,S. Dohta 한국공학교육학회 2010 공학교육연구 Vol.13 No.2
Electronics machines make daily human life more convenient and comfortable and try to ease burdens. When designing and manufacturing such mechatronic systems, the engineers need to have a wide range of knowledge. The purpose of our education is for students to learn to use mechatronic techniques. To realize our goal, we regard “an interest in creation” of our student as an important educational method. In this paper, we propose and try an educational method for mechatronics creation using “their interest”. The method is to hold robot competitions between 1st and 3rd year students as a regular curriculum. In order to confirm the progress of our students in our engineering course, in the last year, some students entered the Rescue Robot Contest held in Kobe Japan. As a result, our student team got second place, a great honor considering it was our first attempt. We confirm that the robot competition is a useful method to make students study by themselves.
T. Hyakutake,Y. Akagi,,T. Imaru,T. Matsumto,S. Yanase 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.11
Flow analysis at microvascular bifurcation after partial replacement of red blood cell (RBC) with liposome-encapsulated hemoglobin (LEH) was performed. A two-dimensional bifurcation model with a parent vessel and two daughter branches was considered. Here, we adopted the lattice Boltzmann method(LBM) for the computation of blood flow. Moreover, the immersed boundary method was employed to incorporate the fluid-membrane interaction between the flow field and deformable RBCs. The cell membrane is treated as a neo-Hookean viscoelastic material. A Morse potential was adopted to model the intercorpuscular interaction. When the half of RBCs was replaced by isovolumic LEH particles, the biasing of RBC flow was enhanced. However, LEH particles flowed favorable into the lower-flow branch because many LEH particles within the parent vessel were suspended in the plasma layer that is impenetrable to RBCs. The biasing of the RBC flux was enhanced when the RBC aggregation was taken into account in the model. It was clarified that the RBC aggregation-induced change of the plasma layer thickness has a marked influence on the fractional LEH flux at the microvascular bifurcation.
White, G. R.,Ainsworth, R.,Akagi, T.,Alabau-Gonzalvo, J.,Angal-Kalinin, D.,Araki, S.,Aryshev, A.,Bai, S.,Bambade, P.,Bett, D. R.,Blair, G.,Blanch, C.,Blanco, O.,Blaskovic-Kraljevic, N.,Bolzon, B.,Boog American Physical Society 2014 Physical Review Letters Vol.112 No.3
<P>A novel scheme for the focusing of high-energy leptons in future linear colliders was proposed in 2001 [P. Raimondi and A. Seryi, Phys. Rev. Lett. 86, 3779 (2001)]. This scheme has many advantageous properties over previously studied focusing schemes, including being significantly shorter for a given energy and having a significantly better energy bandwidth. Experimental results from the ATF2 accelerator at KEK are presented that validate the operating principle of such a scheme by demonstrating the demagnification of a 1.3 GeV electron beam down to below 65 nm in height using an energy-scaled version of the compact focusing optics designed for the ILC collider.</P>
Chiral BEDOT-based copolymers prepared by chemical and electrochemical polymerization
Y.S. Jeong,H. Goto,S. Iimura,T. Asano,K. Akagi 한국물리학회 2006 Current Applied Physics Vol.6 No.5
Optically active conjugated copolymers, poly[1,4-bis[2-(3,4-ethylenedioxy)thienyl]-2,5-benzoic acid-1-methylheptyl ester] [poly(BEDOT-B(OCT.)], were synthesized by chemical and electrochemical oxidative polymerizations. Poly[BEDOT-B(OCT.)] of both(R) and (S) conguration were synthesized by introducing chiral octyloxycarbonyl group in the side chain. The dibromo com-pounds, (R)-1 and (S)-1, were prepared by Mitsunobu reaction by an esterication of (R) o r (S)-octanol and 2,5-dibromobenzoicacid with an aid of diethyl azodicarboxylate (DEAD) and triphenylphosphine (TPP) in tetrahydrofuran. The monomers were thenprepared with Stille coupling technique using Pd(PPh3)4Cl2 as a catalyst to produce (R)-1 and (S)-1. The monomer was electropo-lymerized onto platinum button and ITO glass electrodes by repeated scanning from. 1.0 V to +1.0 V versus Ag/Ag+ at 20 mV/s.The polymer was electrochromic and reversibly switching from purple green upon oxidation. The chemical polymerization was alsocarried out in dimethylformamide with a Ni(cod)2 catalyst. Optical absorption and circular dichroism (CD) measurements wereof chiral polymer with helicity, which can disclose a possibility toward chiralelectrochemistry.
Probing spin-charge relation by magnetoconductance in one-dimensional polymer nanofibers
Choi, A.,Kim, K. H.,Hong, S. J.,Goh, M.,Akagi, K.,Kaner, R. B.,Kirova, N. N.,Brazovskii, S. A.,Johnson, A. T.,Bonnell, D. A.,Mele, E. J.,Park, Y. W. American Physical Society 2012 Physical review. B, Condensed matter and materials Vol.86 No.15