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Article type: Cover
2012 Volume 67 Issue 11 Pages
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Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Article type: Index
2012 Volume 67 Issue 11 Pages
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Published: November 05, 2012
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Article type: Index
2012 Volume 67 Issue 11 Pages
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Published: November 05, 2012
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Article type: Appendix
2012 Volume 67 Issue 11 Pages
735-736
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Hisatomo Harima
Article type: Article
2012 Volume 67 Issue 11 Pages
737-
Published: November 05, 2012
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Toshi-Aki Shibata
Article type: Article
2012 Volume 67 Issue 11 Pages
738-745
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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How the proton spin, which is 1/2, is composed of quarks and gluons is called 'proton spin problem'. It is one of the fundamental topics of physics today. EMC experiment in 1980's discovered that the quark spin contribution to the proton spin is small. It triggered a variety of experiments:charged lepton-nucleon polarized deep inelastic scattering and polarized proton-proton collision using many different accelerators in the world. The quark spin contribution to the proton spin was determined to be about 1/3 in these experiments. The gluon spin contribution to the proton spin is also being measured. There has been much progress in theory as well. The research on this topics up to now is reviewed.
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Sinya Aoki, Tetsuo Hatsuda, Noriyoshi Ishii, Hidekatsu Nemura
Article type: Article
2012 Volume 67 Issue 11 Pages
745-753
Published: November 05, 2012
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We review the successful method recently proposed by us to calculate nuclear forces in lattice QCD. After reviewing scientific importances and current status of nuclear forces, we explain difficulties to study nuclear forces in QCD and show how we have solved such problems. We present nuclear potentials calculated in lattice QCD for the first time in the world and discuss its relevances. We also clarify the questions and confusions on our results and method. We finally present recent developments of our method as much as possible.
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Nariya Uchida
Article type: Article
2012 Volume 67 Issue 11 Pages
754-757
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Many of the unicellular organisms living in water utilize collective motion of flagella and cilia to control their swimming. Although it is conceived that long-range hydrodynamic interactions play crucial roles in their dynamics, the precise mechanism is not yet well understood. We have proposed simple rotor models representing the center-of-mass motion of flagella and cilia, and found generic conditions for synchronization as well as various patterns of collective dynamics.
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Toshio Murakami, Daisuke Yonetoku, Shuichi Gunji, Tatehiro Mihara
Article type: Article
2012 Volume 67 Issue 11 Pages
758-762
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Polarization of Gamma-ray bursts (GRBs) is detected with GAP onboard IKAROS. Within the standard fireball framework, prompt emission of GRBs is understood as the result of synchrotron radiation of the internal shocks. If this is true, the radiation could be highly polarized. We confirmed the high polarization degree of GRB 100826A. The origin of magnetic fields is interesting.
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Hiroshi Shinaoka, Yusuke Tomita, Yukitoshi Motome
Article type: Article
2012 Volume 67 Issue 11 Pages
762-766
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Spin glass, in which spins are frozen in random directions, appears as a result of randomness in magnetic interactions. Recently, it has been pointed out that a certain group of magnets exhibit spin-glass behaviors that are hard to explain by the conventional spin-glass theory. Focusing on geometrical frustration which is common to these magnets, we recently investigated the effects of spin-lattice coupling on spin-glass transitions. We found that many aspects of the puzzling spin-glass behaviors can be explained by a cooperative effect of the sensitivity to randomness inherent in geometrically frustrated magnets and the modification of degenerate manifold into a semidiscrete form by spin-lattice coupling.
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Takayuki Tachibana, Takato Hirayama
Article type: Article
2012 Volume 67 Issue 11 Pages
767-771
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Ion-solid interactions are the foundation that underlies the numerous applications in the science and engineering fields. Rare gas solids are interesting materials for investigating the mechanism of the interactions because of their simplicity and because their electronic structures resemble those of isolated atoms. In this article, we introduce the results for the observation of the desorbed spices from solid Ne by low energy Ar^<g+> ion (q = 1-7) impact.
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Tsuneya Ando
Article type: Article
2012 Volume 67 Issue 11 Pages
772-773
Published: November 05, 2012
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Arisato Ejiri
Article type: Article
2012 Volume 67 Issue 11 Pages
774-777
Published: November 05, 2012
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Kohsuke Yagi
Article type: Article
2012 Volume 67 Issue 11 Pages
777-778
Published: November 05, 2012
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Tsukasa Tada
Article type: Article
2012 Volume 67 Issue 11 Pages
779-780
Published: November 05, 2012
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[in Japanese]
Article type: Article
2012 Volume 67 Issue 11 Pages
781-
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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[in Japanese]
Article type: Article
2012 Volume 67 Issue 11 Pages
781-782
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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2012 Volume 67 Issue 11 Pages
782-
Published: 2012
Released on J-STAGE: October 18, 2019
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Article type: Appendix
2012 Volume 67 Issue 11 Pages
783-785
Published: November 05, 2012
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Article type: Appendix
2012 Volume 67 Issue 11 Pages
785-786
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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[in Japanese]
2012 Volume 67 Issue 11 Pages
786-
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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Article type: Appendix
2012 Volume 67 Issue 11 Pages
787-
Published: November 05, 2012
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Article type: Appendix
2012 Volume 67 Issue 11 Pages
788-808
Published: November 05, 2012
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Article type: Appendix
2012 Volume 67 Issue 11 Pages
809-810
Published: November 05, 2012
Released on J-STAGE: October 18, 2019
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