Institution
Aoyama Gakuin University
Education•Tokyo, Japan•
About: Aoyama Gakuin University is a education organization based out in Tokyo, Japan. It is known for research contribution in the topics: Superconductivity & Thin film. The organization has 3494 authors who have published 6419 publications receiving 115648 citations. The organization is also known as: Aoyama gakuin daigaku.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the effectiveness of science TQM, a new principle of quality management, is discussed and the significance and effectiveness of strategic joint task team activities for cooperative creation necessary for the development of science tqM is discussed.
Abstract: To gain the position of a top runner of the 21st century, the effectiveness of ‘Science TQM’, a new principle of quality management, is proposed and discussed. The significance and effectiveness of ‘strategic joint task team activities’ for cooperative creation necessary for the development of ‘Science TQM’ are discussed. The formation of creative and ‘strategic stratified task teams’ (Tasks 1–8), and the verification of their effectiveness within Toyota and the Toyota group are proposed.
62 citations
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TL;DR: A new simple and versatile strategy to substantially reduce the amount of the undesirable long-lived colored transoid-trans form by introducing an alkoxy group at the 1-position of azino-fused chromenes, i.e., 8H-pyranoquinazolines is found.
Abstract: Benzo-annulated chromenes, i.e., naphthopyrans, are well-known photochromic molecules that undergo photochemical ring-opening reactions to form two colored open-ring isomers, the transoid-cis and transoid-trans forms, upon light irradiation. Though the transoid-cis form returns thermally to the uncolored closed form, the fading rate of the transoid-trans form is extremely slow because of its higher thermal stability. This slow fading behavior of the transoid-trans form is responsible for the persistence of residual color for several minutes to hours, and prevents the application of such molecules to fast photoswitching materials. We have found a new simple and versatile strategy to substantially reduce the amount of the undesirable long-lived colored transoid-trans form by introducing an alkoxy group at the 1-position of azino-fused chromenes, i.e., 8H-pyranoquinazolines. The alkoxy group effectively reduces the formation of the transoid-trans form due to C–H···O intramolecular hydrogen bonding in the tra...
62 citations
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TL;DR: The concerted phenomenon coupled with the charge transfer phase transition in [Fe(II)Fe(III)(dto)(3)](-)(infinity) and the photoisomerization of spiropyran is realized.
Abstract: Iron mixed-valence complex, (n-C3H7)4N[FeIIFeIII(dto)3](dto = C2O2S2), shows a spin entropy-driven phase transition called charge transfer phase transition in [FeIIFeIII(dto)3]−∞ around 120 K and a...
62 citations
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TL;DR: In this article, the dispersion behavior of cylindrical waves in hollow cylinders was evaluated theoretically and experimentally, and it was shown that the L- and F-modes have characteristics which are asymptotic to Lamb waves and to waves in a solid cylinder.
Abstract: Dispersion behavior of guided waves in hollow cylinders (cylindrical waves) was evaluated theoretically and experimentally. Observed dispersion behavior suggests an assignment, different from the traditional one, of longitudinal (L-), flexural (F-) and torsional (T-) modes which are consistent with Lamb waves and shear-horizontal (SH) mode waves. The L- and F-modes of the cylindrical waves have characteristics which are asymptotic to Lamb waves and to waves in a solid cylinder. Experimentally, wide-band cylindrical waves in aluminum pipes were generated using a laser-ultrasonic method. Wavelet transform of the cylindrical wave signals was utilized for time-frequency analysis in order to compare them with the theoretical dispersion curves. For the L(0, 1), F(1, 1), F(2, 1), L(0, 2), F(1, 2) and F(2, 2) modes of the cylindrical waves, which were efficiently excited, theoretical and experimental dispersion curves agree with each other.
62 citations
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TL;DR: In this article, the authors search for gravitational-wave signals produced by cosmic strings in the Advanced LIGO and Virgo full O3 dataset and obtain results for the first time that kink-kink collisions do not yield a detection.
Abstract: We search for gravitational-wave signals produced by cosmic strings in the Advanced LIGO and Virgo full O3 dataset Search results are presented for gravitational waves produced by cosmic string loop features such as cusps, kinks, and, for the first time, kink-kink collisions A template-based search for short-duration transient signals does not yield a detection We also use the stochastic gravitational-wave background energy density upper limits derived from the O3 data to constrain the cosmic string tension Gμ as a function of the number of kinks, or the number of cusps, for two cosmic string loop distribution models Additionally, we develop and test a third model that interpolates between these two models Our results improve upon the previous LIGO-Virgo constraints on Gμ by 1 to 2 orders of magnitude depending on the model that is tested In particular, for the one-loop distribution model, we set the most competitive constraints to date: Gμ≲4×10^{-15} In the case of cosmic strings formed at the end of inflation in the context of grand unified theories, these results challenge simple inflationary models
62 citations
Authors
Showing all 3525 results
Name | H-index | Papers | Citations |
---|---|---|---|
Katsuhiko Mikoshiba | 120 | 866 | 62394 |
Tadayuki Takahashi | 112 | 932 | 57501 |
Takaaki Tanaka | 105 | 321 | 41804 |
Yasunobu Uchiyama | 105 | 373 | 39610 |
Sang-Wook Cheong | 79 | 645 | 37338 |
T. Sakamoto | 65 | 523 | 17443 |
Yutaka Saito | 64 | 516 | 17729 |
Nakao Iwata | 64 | 548 | 24469 |
Ryo Yamazaki | 59 | 317 | 16782 |
Takeshi Go Tsuru | 59 | 405 | 13507 |
Masahiro Yamashita | 58 | 573 | 15371 |
Toshio Yamagishi | 52 | 152 | 12998 |
Jun Akimitsu | 52 | 608 | 11035 |
Kazutaka Yamaoka | 51 | 372 | 11846 |
Aya Bamba | 50 | 306 | 13253 |