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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.
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
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.
M.J. Goh,M. Kyotani,K. Akagi 한국물리학회 2006 Current Applied Physics Vol.6 No.5
We synthesized novel mesogenic axially chiral binaphthyl derivative by substituting phenyl-cyclohexyl (PCH) moieties into 2, 20,6 and 60 positions of binaphthyl rings. The binaphthyl derivative showed the highest twisting power ofbM = 381.87 l m. 1, when0.05 mol% of the chiral dopant was added into a mixture of PCH302 and PCH304. The helical pitches of N*-LC varied from270 to 350 nm with changes of the concentration of the chiral dopant from 1.5 to 1.0 mol%. These helical pitches are smallerone-tenth than those (25l m) observed in the N*-LC containing di-substituted binaphthyl derivatives. This indicates that the pres-ent N*-LC including tetra-substituted binaphthyl derivatives is feasible for much higher twisted asymmetric reaction eld. It is ofinterest that the polyacetylene lm synthesized in the N*-LC with helical pitch of 270 nm showed highly screwed brils, but notthe bundle of bril. This is due to the fact that the helical pitch of 270 nm is smaller than the diameter of the bundle of bril. Thissituation might depress the formation of the bundle of bril. The brillar morphology without the bundle of brils should make it much easier to evaluate electromagnetic properties of the screwed fibril.
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.
Synthesis and properties of PEDOT derivatives containing liquid crystalline groups
Y.S. Jeong,H. Goto,J.R. Reynolds,K. Akagi 한국물리학회 2006 Current Applied Physics Vol.6 No.5
We have developed novel liquid crystalline conjugated polymers consisting of alternating blocks of EDOT and phenylene unitssubstituted with two mesogenic groups. The chemical polymerization was carried out in dimethylformamide with a Ni(cod) catalyst.Electrochemical polymerizations were also examined in acetonitrile and tetrahydrofuran. The monomer was electropolymerizedonto platinum button and ITO glass electrodes by repeated scanning from. 1.6 V to + 1.6 V versus Ag/Ag+ at 20 mV/s. The poly-mer was electrochromic and reversibly switching from deep purple to emerald green upon oxidation. The polymer structure wasconrmed by NMR, IR, GPC, and elemental analysis. Optical absorption and photoluminescence measurements were performed.Thermal and liquid crystalline properties of the polymers were investigated by optical polarizing microscopy and dierential scan-ning calorimetry (DSC). The combination of liquid crystalline (LC) and electrochromic properties allowed us to obtain color tun-able liquid crystal materials with optical anisotropy. The polymer may nd use as a new functional material for liquid crystallineelectrochromic device .