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Article type: Cover
2015 Volume 70 Issue 8 Pages
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Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Hiroshi Matsukawa
Article type: Article
2015 Volume 70 Issue 8 Pages
585-
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Index
2015 Volume 70 Issue 8 Pages
586-587
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Tetsuya Aruga
Article type: Article
2015 Volume 70 Issue 8 Pages
588-589
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 8 Pages
590-
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Koichi Shimoda
Article type: Article
2015 Volume 70 Issue 8 Pages
591-598
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Epoch-making properties of the laser are characterized by temporal and spatial coherence of the laser, which cannot be expressed by classical coherence functions. Invention of masers followed by lasers revolutionized optics in a variety of fields from basic physics to practical applications. The laser optics is a ubiquitous technology in the present society.
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Kazumasa A. Takeuchi
Article type: Article
2015 Volume 70 Issue 8 Pages
599-607
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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This article is an introductory survey of non-equilibrium critical phenomena at phase transitions into absorbing states, i.e., states which a system can never escape from once it entered. Scaling laws governing such transitions are reviewed, in particular for the case of the fundamental universality class called the directed percolation class, on the basis of an experimental example found in liquid-crystal turbulence. Recent experimental developments on absorbing-state transitions are also discussed, which concern fluid systems, colloid suspensions, and superconductor vortices.
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Tetsuya Hama, Akira Kouchi, Naoki Watanabe
Article type: Article
2015 Volume 70 Issue 8 Pages
608-613
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Diffusion of hydrogen atom on cosmic dust is a key issue for the formation of interstellar hydrogen molecule, as well as chemical evolution in molecular clouds. Using the combination of Photon Stimulated Desorption (PSD) and Resonance Enhanced MultiPhoton Ionization (REMPI) techniques, we have investigated activation energy and mechanism of surface diffusion of hydrogen atom on amorphous solid water at low temperatures.
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Yujiro Eto, Hiroki Saito, Takuya Hirano
Article type: Article
2015 Volume 70 Issue 8 Pages
614-619
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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We observed the spin texture formation and the spatial modulation of the longitudinal magnetization in a spin-2 ^<87>Rb Bose-Einstein condensate. The observed results are compared with numerical simulations of the Gross-Pitaevskii equation, which are the effects due to the magnetic dipole-dipole interaction. These results show that the magnetic dipole-dipole interaction has significant effects even on spinor condensates of alkali metal atoms.
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Yoshiaki Sugimoto
Article type: Article
2015 Volume 70 Issue 8 Pages
620-624
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Atomic-scale junction is of importance in both fundamental physics and is also of practical importance for nanotechnology. As two objects are brought near to contact, an overlap of the wave-functions produces the chemical interaction force (F). If the bias voltage is applied between them, the tunneling current (I) is also generated in the atomic junction. It has been pointed out that there is equivalence between F and I as a corollary of quantum mechanics. The simple relation was theoretically predicted, i.e. the square relation (I∝F^2) and the linear relation (I∝F). Experimentally, the correlation has been investigated by atomic force microscopy (AFM). Recent AFM measurements produced I∝F relations on the metallic surfaces, which were supported by first principle calculations with nonperturbative treatment of the electron transport. According to the latest theoretical model, I∝F relation was reproduced for non-degenerate electronic states between tip and sample while I∝F^2 relation was also predicted for the quantum-degenerate situation for two energetically localized states. We combine site-specific force/current measurements and first-principles calculations on the Si (111)-(7×7) surface. We obtained I∝F^2 relation at the weak interaction regime. The quantum degeneracy of spatially and energetically localized electronic states between the tip and Si adatom can explain the relation.
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Hidemitsu Furukawa, Masaru Kawakami, Masato Makino, Azusa Saito
Article type: Article
2015 Volume 70 Issue 8 Pages
625-630
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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3D (three-dimensional) printing technology is coming up in industry and science. The variety of the 3D printing methods and materials is increasing day by day. Recently we developed 3D gel printer for the modeling of soft gel materials into user-designed shapes, and also we are developing 3D gel scanner to utilize the non-destructive evaluation of internal structure in gels, based on our established technique of scanning microscopic light scattering. We believe the new combination of these scanning and modeling methods of 3D gel materials will be essential tools for the fabrication of soft and wet materials with complicated structures like micro-channels for lab-on-chips, biomimetic devices, and micro-biomedical robots with soft actuators. Further, the 3D printing will also empower scientific researchers to understand complicated 3D structures in nature. For example, molecular models fabricated by 3D printer will enable researchers to see, touch, and test ideas about the models. The 3D printing also makes it possible to visualize calculated (simulated) intricate 3D structures like the phase separated structure of gyroids, and especially to experiment on the motion of designed objects in fluid dynamics.
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 8 Pages
631-633
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
2015 Volume 70 Issue 8 Pages
634-640
Published: 2015
Released on J-STAGE: August 21, 2019
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Anthony J. Leggett
Article type: Article
2015 Volume 70 Issue 8 Pages
641-642
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
2015 Volume 70 Issue 8 Pages
643-
Published: 2015
Released on J-STAGE: August 22, 2019
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[in Japanese]
2015 Volume 70 Issue 8 Pages
643-
Published: 2015
Released on J-STAGE: August 22, 2019
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[in Japanese]
2015 Volume 70 Issue 8 Pages
644-
Published: 2015
Released on J-STAGE: August 22, 2019
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[in Japanese]
2015 Volume 70 Issue 8 Pages
644-
Published: 2015
Released on J-STAGE: August 22, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 8 Pages
645-
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 8 Pages
646-
Published: August 05, 2015
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[in Japanese]
Article type: Article
2015 Volume 70 Issue 8 Pages
646-647
Published: August 05, 2015
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Article type: Appendix
2015 Volume 70 Issue 8 Pages
648-652
Published: August 05, 2015
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Article type: Appendix
2015 Volume 70 Issue 8 Pages
653-
Published: August 05, 2015
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[in Japanese]
2015 Volume 70 Issue 8 Pages
654-
Published: August 05, 2015
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2015 Volume 70 Issue 8 Pages
655-658
Published: August 05, 2015
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2015 Volume 70 Issue 8 Pages
659-666
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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Article type: Appendix
2015 Volume 70 Issue 8 Pages
667-668
Published: August 05, 2015
Released on J-STAGE: August 21, 2019
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