検索結果 1276 件
| フルテキストURL | mjou_067_133_147.pdf |
|---|---|
| 著者 | Nakagawa, Yuto| Nakano, Fumihiko| |
| 抄録 | K. Brown [1] studied the random to top shuffle (the Tsetlin libary) by semigroup method. In this paper, (i) we extend his results to the colored permutation groups, and (ii) we consider a q-analogue of Tsetlin library which is different from what is studied in [1]. In (i), the results also extends those results for the top to random shuffle [4],[5], [6] to arbitrary distribution of choosing cards, but we still have derangement numbers in the multiplicity of each eigenvalues. In (ii), a version of q-analogue of derangement numbers by Chen-Rota [3] appears in the multiplicity of eigenvalues. |
| キーワード | Tsetlin library Left Regular Band colored permutation group |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 133 |
| 終了ページ | 147 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_067_101_131.pdf |
|---|---|
| 著者 | Ohmoto, Toyokazu| |
| 抄録 | An alternating sign matrix (ASM for short) is a square matrix which consists of 0, 1 and −1. In this paper, we characterize an ASM by showing a bijection between alternating sign matrix and six vertex model, and a bijection between six vertex model and height function. In order to show these bijections, we define a triplet (ai,j , ci,j , ri,j) for each entry of an ASM. We also define a track for each index of height function, and state more properties of height function. |
| キーワード | Alternating sign matrix six vertex model height function |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 101 |
| 終了ページ | 131 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_067_075_099.pdf |
|---|---|
| 著者 | Yamagishi, Hiroyuki| Kametaka, Yoshinori| |
| 抄録 | The Sobolev inequality shows that the supremum of a function defined on a whole line is estimated from the above by constant multiples of the potential energy. Among such constants, the smallest constant is the best constant. If we replace a constant by the best constant in the Sobolev inequality, then the equality holds for the best function. The aim of this paper is to find the best constant and the best function. In the background, there is a bending problem of a string with a rectangular spring constant. The Green function is an important function because the best constant and the best function consist of the Green function. |
| キーワード | Sobolev inequality Green function reproducing kernel |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 75 |
| 終了ページ | 99 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_067_067_074.pdf |
|---|---|
| 著者 | Honda, Masanobu| Sakamoto, Takanori| |
| 抄録 | We assume that a basic field k has zero characteristic. We show that any Fitting class is serially coalescent for locally finite Lie algebras. We also show that any class X satisfying N ≤ X ≤ ˆGr (e.g. Ft, B, Z, Gr, lN, rN, `e(◁)ˆA, ˆe(◁)ˆA, `Gr) is locally serially coalescent for locally finite Lie algebras, and, for any locally finite Lie algebra L, the X-ser radical of L is locally nilpotent. |
| キーワード | Lie algebra serial subalgebra locally coalescent class |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 67 |
| 終了ページ | 74 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_067_053_065.pdf |
|---|---|
| 著者 | Harrington, Joshua| Jones, Lenny| |
| 抄録 | A polynomial f(x) ∈ Z[x] of degree N is called monogenic if f(x) is irreducible over Q and {1, θ, θ2, . . . , θN−1} is a basis for the ring of integers of Q(θ), where f(θ) = 0. Define F(x) := xm+Axm−1+B. In this article, we determine sets of conditions on m, A, and B, such that the power-compositional trinomial F(xpn) is monogenic for all integers n ≥ 0 and a given prime p. Furthermore, we prove the actual existence of infinite families of such trinomials F(x). |
| キーワード | irreducible monogenic power-compositional trinomial |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 53 |
| 終了ページ | 65 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_067_029_051.pdf |
|---|---|
| 著者 | Haraguchi, Tadayuki| Shimakawa, Kazuhisa| |
| 抄録 | We construct on the category of diffeological spaces a Quillen model structure having smooth weak homotopy equivalences as the class of weak equivalences. |
| キーワード | Diffeological space Homotopy theory Model category |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 29 |
| 終了ページ | 51 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_067_001_028.pdf |
|---|---|
| 著者 | Wakabayashi, Yasuhiro| |
| 抄録 | The present paper aims to generalize a result by H. Kaji on Gauss maps in positive characteristic and establish an interaction with the study of dormant opers and Frobenius-projective structures. We prove a correspondence between dormant opers on a smooth projective variety and closed immersions into a projective space with purely inseparable Gauss map. By using this, we determine the subfields of the function field of a smooth curve in positive characteristic induced by Gauss maps. Moreover, this correspondence gives us a Frobenius-projective structure on a Fermat hypersurface. |
| キーワード | Gauss map Frobenius-projective structure dormant indigenous bundle oper |
| 発行日 | 2025-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 67巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 1 |
| 終了ページ | 28 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright ©2025 by the Editorial Board of Mathematical Journal of Okayama University |
| JaLCDOI | 10.18926/CTED/68481 |
|---|---|
| タイトル（別表記） | Childcare and Support in Nursery Schools for the Development of Geometry and Number Sense for Five-Year-Old Children |
| フルテキストURL | cted_015_045.pdf |
| 著者 | 鈴木 楓花| 片山 美香| |
| 抄録 | 本研究では、幼児期の終わりまでに育って欲しい10の姿のひとつである、「数量・図形、文字等への関心・感覚」に着目し、就学前の５歳児に焦点を当て、保育所の日常生活や遊びにおいて子どもがどのような数量・図形に関する事柄を経験しているのか、また、その経験を小学校１年生の算数科の学習内容と照らして検討した。さらに、子どもが園生活や遊びの中で数量・図形に関心をもって親しみ、学びを得ることを支える保育の在り方について検討した。 その結果、子どもは日常の中で主体的に数量・図形に親しむ経験をすると共に、その経験が小学校算数科の内容に連続する学びの基礎となっていることが明らかになった。また、保育士自身が小学校算数との繋がりを見通しながら、眼前の子どもの興味や関心に沿って援助することが専門的力量として求められることが示唆された。 |
| キーワード | 10 の姿 数量・図形 保育士 専門的力量 小学校算数科 the Ideal Image by the End of Childhood numbers & geometry professional nursery school teachers elementary school mathematics |
| 出版物タイトル | 岡山大学教師教育開発センター紀要 |
| 発行日 | 2025-03-28 |
| 巻 | 15巻 |
| 開始ページ | 45 |
| 終了ページ | 58 |
| ISSN | 2186-1323 |
| 言語 | 日本語 |
| 著作権者 | Copyright © 2025 岡山大学教師教育開発センター |
| 論文のバージョン | publisher |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Ninomiya, Hirokazu| Taniguchi, Masaharu| |
| 備考 | The version of record of this article, first published in Archive for Rational Mechanics and Analysis, is available online at Publisher’s website: http://dx.doi.org/10.1007/s00205-025-02083-2| |
| 発行日 | 2025-01-21 |
| 出版物タイトル | Archive for Rational Mechanics and Analysis |
| 巻 | 249巻 |
| 号 | 1号 |
| 出版者 | Springer Science and Business Media LLC |
| 開始ページ | 13 |
| ISSN | 0003-9527 |
| NCID | AA00547035 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) |
| 論文のバージョン | publisher |
| DOI | 10.1007/s00205-025-02083-2 |
| Web of Science KeyUT | 001401218000001 |
| 関連URL | isVersionOf https://doi.org/10.1007/s00205-025-02083-2 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Takase, Y.| Vacher, L.| Ishino, H.| Patanchon, G.| Montier, L.| Stever, S.L.| Ishizaka, K.| Nagano, Y.| Wang, W.| Aumont, J.| Aizawa, K.| Anand, A.| Baccigalupi, C.| Ballardini, M.| Banday, A.J.| Barreiro, R.B.| Bartolo, N.| Basak, S.| Bersanelli, M.| Bortolami, M.| Brinckmann, T.| Calabrese, E.| Campeti, P.| Carinos, E.| Carones, A.| Casas, F.J.| Cheung, K.| Clermont, L.| Columbro, F.| Coppolecchia, A.| Cuttaia, F.| D'Alessandro, G.| de Bernardis, P.| de Haan, T.| de la Hoz, E.| Della Torre, S.| Diego-Palazuelos, P.| Eriksen, H.K.| Errard, J.| Finelli, F.| Fuskeland, U.| Galloni, G.| Galloway, M.| Gervasi, M.| Ghigna, T.| Giardiello, S.| Gimeno-Amo, C.| Gjerløw, E.| González González, R.| Gruppuso, A.| Hazumi, M.| Henrot-Versillé, S.| Hergt, L.T.| Ikuma, K.| Kohri, K.| Lamagna, L.| Lattanzi, M.| Leloup, C.| Lembo, M.| Levrier, F.| Lonappan, A.I.| López-Caniego, M.| Luzzi, G.| Maffei, B.| Martínez-González, E.| Masi, S.| Matarrese, S.| Matsuda, F.T.| Matsumura, T.| Micheli, S.| Migliaccio, M.| Monelli, M.| Morgante, G.| Mot, B.| Nagata, R.| Namikawa, T.| Novelli, A.| Odagiri, K.| Oguri, S.| Omae, R.| Pagano, L.| Paoletti, D.| Piacentini, F.| Pinchera, M.| Polenta, G.| Porcelli, L.| Raffuzzi, N.| Remazeilles, M.| Ritacco, A.| Ruiz-Granda, M.| Sakurai, Y.| Scott, D.| Sekimoto, Y.| Shiraishi, M.| Signorelli, G.| Sullivan, R.M.| Takakura, H.| Terenzi, L.| Tomasi, M.| Tristram, M.| van Tent, B.| Vielva, P.| Wehus, I.K.| Westbrook, B.| Weymann-Despres, G.| Wollack, E.J.| Zannoni, M.| Zhou, Y.| |
| キーワード | CMBR experiments CMBR polarisation gravitational waves and CMBR polarization |
| 発行日 | 2024-12 |
| 出版物タイトル | Journal of Cosmology and Astroparticle Physics |
| 巻 | 2024巻 |
| 号 | 12号 |
| 出版者 | IOP Publishing |
| ISSN | 1475-7516 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 The Author(s) |
| 論文のバージョン | publisher |
| DOI | 10.1088/1475-7516/2024/12/036 |
| Web of Science KeyUT | 001379854100009 |
| 関連URL | isVersionOf https://doi.org/10.1088/1475-7516/2024/12/036 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Nara, Shigetoshi| Yamaguti, Yutaka| Tsuda, Ichiro| |
| キーワード | Neuromodulator Nichotinic Acetylcholine Receptors Brain activity |
| 備考 | The version of record of this article, first published in Cognitive Neurodynamics, is available online at Publisher’s website: http://dx.doi.org/10.1007/s11571-023-09975-7| |
| 発行日 | 2023-05-19 |
| 出版物タイトル | Cognitive Neurodynamics |
| 巻 | 18巻 |
| 号 | 3号 |
| 出版者 | Springer Science and Business Media LLC |
| 開始ページ | 769 |
| 終了ページ | 774 |
| ISSN | 1871-4080 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) 2023 |
| 論文のバージョン | publisher |
| PubMed ID | 37362764 |
| DOI | 10.1007/s11571-023-09975-7 |
| Web of Science KeyUT | 000990976800001 |
| 関連URL | isVersionOf https://doi.org/10.1007/s11571-023-09975-7 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Kaneko, Daisuke| Takatori, Sayuri| Hasegawa, Masaya| Hazumi, Masashi| Inoue, Yuki| Jeong, Oliver| Katayama, Nobuhiko| Lee, Adrian T.| Matsuda, Frederick| Nishino, Haruki| Siritanasak, Praween| Suzuki, Aritoki| Takakura, Satoru| Tomaru, Takayuki| |
| キーワード | cosmic microwave background gain calibrator detector calibration transition edge sensor |
| 発行日 | 2024-01-27 |
| 出版物タイトル | Journal of Astronomical Telescopes, Instruments, and Systems |
| 巻 | 10巻 |
| 号 | 1号 |
| 出版者 | Society of Photo-optical Instrumentation Engineers |
| 開始ページ | 018003 |
| ISSN | 2329-4124 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Authors. |
| 論文のバージョン | publisher |
| DOI | 10.1117/1.jatis.10.1.018003 |
| Web of Science KeyUT | 001295821000027 |
| 関連URL | isVersionOf https://doi.org/10.1117/1.jatis.10.1.018003 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Sumi, Tomonari| Harada, Kouji| |
| キーワード | post-acute sequelae of SARS-CoV-2 infection PASC long Covid persistent viruses vaccine antiviral drug mathematical model immune response |
| 発行日 | 2024-08-09 |
| 出版物タイトル | Frontiers in Immunology |
| 巻 | 15巻 |
| 出版者 | Frontiers Media |
| 開始ページ | 1329162 |
| ISSN | 1664-3224 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 Sumi and Harada. |
| 論文のバージョン | publisher |
| PubMed ID | 39185419 |
| DOI | 10.3389/fimmu.2024.1329162 |
| Web of Science KeyUT | 001295899400001 |
| 関連URL | isVersionOf https://doi.org/10.3389/fimmu.2024.1329162 |
| フルテキストURL | fulltext20240722-01.pdf |
|---|---|
| 著者 | Jinzenji, Masao| Matsuzaka, Kohki| |
| キーワード | Givental's I-function Generalized hypergeometric series Moduli space of quasimaps Intersection number |
| 備考 | This is an Accepted Manuscript of an article published by Tokyo Institute of Technology, Department of Mathematics.| Kodai Mathematical Journal Vol. 47 No. 2に掲載。| |
| 発行日 | 2024-06 |
| 出版物タイトル | Kodai Mathematical Journal |
| 巻 | 47巻 |
| 号 | 2号 |
| 出版者 | Tokyo Institute of Technology, Department of Mathematics |
| 開始ページ | 162 |
| 終了ページ | 177 |
| ISSN | 0386-5991 |
| NCID | AA00711773 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 Tokyo Institute of Technology, Department of Mathematics |
| 論文のバージョン | author |
| DOI | 10.2996/kmj47203 |
| Web of Science KeyUT | 001265353200003 |
| 関連URL | isVersionOf https://doi.org/10.2996/kmj47203 |
| JaLCDOI | 10.18926/AMO/67197 |
|---|---|
| フルテキストURL | 78_3_227.pdf |
| 著者 | Wada, Yudai| Ushio, Soichiro| Kitamura, Yoshihisa| Zamami, Yoshito| Sendo, Toshiaki| |
| 抄録 | Zolpidem, a non-benzodiazepine hypnotic, is primarily used to treat insomnia. In a previous study, pior treatment with non-benzodiazepine receptor agonists was associated with inflammation. The present study aimed to clarify the association between the effects of zolpidem and inflammation in mice treated with lipopolysaccharide (LPS), a known model of inflammation. We assessed the zolpidem-induced loss of righting reflex (LORR) duration 24 h after LPS treatment in mice. Additionally, the expressions of γ-aminobutyric acid (GABA)A receptor subunit and K+-Cl− cotransporter isoform 2 (KCC2) mRNA in the hippocampus and frontal cortex were examined in LPS-treated mice. Pretreatment with LPS was associated with significantly prolonged duration of zolpidem-induced LORR compared to control mice. This effect was significantly attenuated by administering bicuculline, a GABAA receptor antagonist, or flumazenil, a benzodiazepine receptor antagonist, in LPS-treated mice. Compared to controls, LPS-treated mice showed no significant change in the expression of GABAA receptor subunits in the hippocampus or frontal cortex. Bumetanide, an Na+-K+-2Cl− cotransporter isoform 1 blocker, attenuated the extended duration of zolpidem-induced LORR observed in LPS-treated mice. LPS significantly decreased Kcc2 mRNA expression in the hippocampus and the frontal cortex. These findings suggest that inflammation increases zolpidem-induced LORR, possibly through a reduction in KCC2 expression. |
| キーワード | lipopolysaccharide zolpidem GABAA receptor K+-Cl− cotransporters |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2024-06 |
| 巻 | 78巻 |
| 号 | 3号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 227 |
| 終了ページ | 235 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| 著作権者 | Copyright Ⓒ 2024 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 38902210 |
| Web of Science KeyUT | 001267351000003 |
| フルテキストURL | fulltext20240513-01.pdf |
|---|---|
| 著者 | Hagimori, Yusuke| Obuse, Kiori| Yamada, Michio| |
| 備考 | This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Yusuke Hagimori, Kiori Obuse, Michio Yamada; Effect of non-local near-resonant interactions of Rossby waves on formation of large-scale zonal flows in unforced two-dimensional turbulence on rotating sphere. Physics of Fluids 1 March 2024; 36 (3): 036617. https://doi.org/10.1063/5.0201288 and may be found at https://doi.org/10.1063/5.0201288.| |
| 発行日 | 2024-03-19 |
| 出版物タイトル | Physics of Fluids |
| 巻 | 36巻 |
| 号 | 3号 |
| 出版者 | AIP Publishing |
| 開始ページ | 036617 |
| ISSN | 1070-6631 |
| NCID | AA10986202 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2024 Author(s). |
| 論文のバージョン | author |
| DOI | 10.1063/5.0201288 |
| Web of Science KeyUT | 001187340000008 |
| 関連URL | isVersionOf https://doi.org/10.1063/5.0201288 |
| フルテキストURL | fulltext.pdf |
|---|---|
| 著者 | Obayashi, Ippei| Yoshiwaki, Michio| |
| キーワード | Topological data analysis Persistent homology Algorithm Algebraic topology |
| 備考 | The version of record of this article, first published in Discrete & Computational Geometry, is available online at Publisher’s website: http://dx.doi.org/10.1007/s00454-023-00544-7| |
| 発行日 | 2023-08-18 |
| 出版物タイトル | Discrete & Computational Geometry |
| 巻 | 70巻 |
| 号 | 3号 |
| 出版者 | Springer Science and Business Media LLC |
| 開始ページ | 645 |
| 終了ページ | 670 |
| ISSN | 0179-5376 |
| NCID | AA1067900X |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © The Author(s) 2023 |
| 論文のバージョン | publisher |
| DOI | 10.1007/s00454-023-00544-7 |
| Web of Science KeyUT | 001051805700002 |
| 関連URL | isVersionOf https://doi.org/10.1007/s00454-023-00544-7 |
| JaLCDOI | 10.18926/ESR/66846 |
|---|---|
| フルテキストURL | esr_030_021_035.pdf |
| 著者 | MAURER, Robert| HARKER, Stuart| SUZUKI, Shigeyuki| WHEELER, Allan| |
| 抄録 | Mantle convection currents are the currently accepted driving force for plate tectonics that have ripped apart the continents and created oceans. Because of these actions, continental collisions and ocean closures have resulted. Our paper challenges the conventional concept and provides an alternate, mathematically justified drive mechanism. The pull-push motions of such convection currents in the upper mantle are here concluded to be too weak to be the driving mechanism. Our proposal for such global scale forces concerns the effect of an offset centre of mass of the Earth that results in rotational wobbling. Kepler’s laws of planetary motion demonstrate the rotational behavior of the Earth to be aligned with the Sun on the outward and inward motions of the elliptical orbit. The unbalanced rotation on a fixed gravitational axis results in circumferential stresses on the outer Earth’s rim that is more than strong enough to pull the continental plates apart. The proposed unbalanced rotational stress force equation is shown to be sufficient to drive the cyclic breakup and reassembly of the continental plates, as well as the generation of new oceanic crust and subduction zones. Mantle convection currents are here demonstrated to have a passive rather than active role in the plate movements. |
| キーワード | Differential circumferential tensile force Rotating Earth Offset centre of mass radius of eccentricity |
| 出版物タイトル | Okayama University Earth Science Report |
| 発行日 | 2024-03-31 |
| 巻 | 30巻 |
| 号 | 1号 |
| 開始ページ | 21 |
| 終了ページ | 35 |
| ISSN | 1340-7414 |
| 言語 | 英語 |
| 著作権者 | © 2024 by Okayama University Earth Science Reports Editorial Committee All Rights Reserved |
| 論文のバージョン | publisher |
| フルテキストURL | srfa_113_041_048.pdf |
|---|---|
| 著者 | Tanaka, Yu| Watanabe, Tomoya| Katsura, Keisuke| Tsujimoto, Yasuhiro| Takai, Toshiyuki| Tanaka, Takashi Sonam Tashi| Kawamura, Kensuke| Saito, Hiroki| Homma, Koki| Mairoua, Salifou Goube| Ahouanton, Kokou| Ibrahim, Ali| Senthilkumar, Kalimuthu| Semwal, Vimal Kumar| Matute, Eduardo Jose Graterol| Corredor, Edgar| El-Namaky, Raafat| Manigbas, Norvie| Quilang, Eduardo Jimmy P.| Iwahashi, Yu| Nakajima, Kota| Takeuchi, Eisuke| Saito, Kazuki| |
| 抄録 | Rice (Oryza sativa L.) is one of the most important cereals, which provides 20% of the world’s food energy. However, its productivity is poorly assessed especially in the global South. Here, we provide a first study to perform a deep learning-based approach for instantaneously estimating rice yield using RGB images. During ripening stage and at harvest, over 22,000 digital images were captured vertically downwards over the rice canopy from a distance of 0.8 to 0.9m at 4,820 harvesting plots having the yield of 0.1 to 16.1 t ha-1 across six countries in Africa and Japan. A convolutional neural network (CNN) applied to these data at harvest predicted 68% variation in yield with a relative root mean square error (rRMSE) of 0.22. Even when the resolution of images was reduced (from 0.2 to 3.2cm pixel-1 of ground sampling distance), the model could predict 57% variation in yield, implying that this approach can be scaled by use of unmanned aerial vehicles. Our work offers low-cost, hands-on, and rapid approach for high throughput phenotyping, and can lead to impact assessment of productivity-enhancing interventions, detection of fields where these are needed to sustainably increase crop production. |
| キーワード | Rice (Oryza sativa L.) rough grain yield convolutional neural network RGB images UAV |
| 出版物タイトル | 岡山大学農学部学術報告 |
| 発行日 | 2024-02-01 |
| 巻 | 113巻 |
| 開始ページ | 41 |
| 終了ページ | 48 |
| ISSN | 2186-7755 |
| 言語 | 英語 |
| 論文のバージョン | publisher |
| フルテキストURL | fulltext20240109-02.pdf |
|---|---|
| 著者 | Tanaka, Yu| Watanabe, Tomoya| Katsura, Keisuke| Tsujimoto, Yasuhiro| Takai, Toshiyuki| Tanaka, Takashi Sonam Tashi| Kawamura, Kensuke| Saito, Hiroki| Homma, Koki| Mairoua, Salifou Goube| Ahouanton, Kokou| Ibrahim, Ali| Senthilkumar, Kalimuthu| Semwal, Vimal Kumar| Matute, Eduardo Jose Graterol| Corredor, Edgar| El-Namaky, Raafat| Manigbas, Norvie| Quilang, Eduardo Jimmy P.| Iwahashi, Yu| Nakajima, Kota| Takeuchi, Eisuke| Saito, Kazuki| |
| 発行日 | 2023-07-28 |
| 出版物タイトル | Plant Phenomics |
| 巻 | 5巻 |
| 出版者 | American Association for the Advancement of Science (AAAS) |
| 開始ページ | 0073 |
| ISSN | 2643-6515 |
| 資料タイプ | 学術雑誌論文 |
| 言語 | 英語 |
| OAI-PMH Set | 岡山大学 |
| 著作権者 | © 2023 Yu Tanaka et al. |
| 論文のバージョン | publisher |
| DOI | 10.34133/plantphenomics.0073 |
| Web of Science KeyUT | 001124487900004 |
| 関連URL | isVersionOf https://doi.org/10.34133/plantphenomics.0073 |