result 1266 件
| FullText URL | mjou_064_075_107.pdf |
|---|---|
| Author | Nagamachi, Ippei| |
| Abstract | We give good reduction criteria for hyperbolic polycurves, i.e., successive extensions of families of curves, under some assumptions. These criteria are higher dimensional versions of the good reduction criterion for hyperbolic curves given by Oda and Tamagawa. |
| Keywords | good reduction, hyperbolic curve, polyucurve, ètale fundamental group. |
| Published Date | 2022-01 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume64 |
| Issue | issue1 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 75 |
| End Page | 107 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_064_063_073.pdf |
|---|---|
| Author | Tasaka, Koji| |
| Abstract | A partial answer to a conjecture about the rank of the matrix CN,r introduced by Francis Brown in the study of totally odd multiple zeta values is given. |
| Keywords | Multiple zeta values Period polynomials |
| Published Date | 2022-01 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume64 |
| Issue | issue1 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 63 |
| End Page | 73 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_064_047_061.pdf |
|---|---|
| Author | Yamanaka, Satoshi| |
| Abstract | The notion of weakly separable extensions was introduced by N. Hamaguchi and A. Nakajima as a generalization of separable extensions. The purpose of this article is to give a characterization of weakly separable polynomials in skew polynomial rings. Moreover, we shall show the relation between separability and weak separability in skew polynomial rings of derivation type. |
| Keywords | separable extension weakly separable extension skew polynomial ring derivation |
| Published Date | 2022-01 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume64 |
| Issue | issue1 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 47 |
| End Page | 61 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_064_031_045.pdf |
|---|---|
| Author | Yamagishi, Hiroyuki| |
| Abstract | We have the best constants of three kinds of discrete Sobolev inequalities on the complete bipartite graph with 2N vertices, that is, KN,N. We introduce a discrete Laplacian A on KN,N. A is a 2N ×2N real symmetric positive-semidefinite matrix whose eigenvector corresponding to zero eigenvalue is 1 = t(1, 1, … , 1)∈ C2N. A discrete heat kernel, a Green’s matrix and a pseudo Green’s matrix play important roles in giving the best constants. |
| Keywords | Discrete Sobolev inequality Discrete Laplacian Green’s matrix Reproducing relation |
| Published Date | 2022-01 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume64 |
| Issue | issue1 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 31 |
| End Page | 45 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_064_013_029.pdf |
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| Author | Seita, Kohei| |
| Abstract | Let G be a finite group. In 1970s, T. Petrie defined the Smith equivalence of real G-modules. The Smith set of G is the subset of the real representation ring consisting of elements obtained as differences of Smith equivalent real G-modules. Various results of the topic have been obtained. The d-Smith set of G is the set of all elements [V ]−[W] in the Smith set of G such that the H-fixed point sets of V and W have the same dimension for all subgroups H of G. The results of the Smith sets of the alternating groups and the symmetric groups are obtained by E. Laitinen, K. Pawa lowski and R. Solomon. In this paper, we give the calculation results of the d-Smith sets of the alternating groups and the symmetric groups. In addition, we give the calculation results of the d-Smith sets of Cartesian products of the alternating groups and finite elementary abelian 2-groups. |
| Keywords | Real G-module Smith equivalence Oliver group alternating group |
| Published Date | 2022-01 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume64 |
| Issue | issue1 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 13 |
| End Page | 29 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_064_001_011.pdf |
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| Author | Hoshi, Yuichiro| |
| Abstract | In the present paper, we consider torsion points on ample divisors on abelian varieties. We prove that, for each integer n ≤ 2, an effective divisor of level n on an abelian variety does not contain the subgroup of n-torsion points. Moreover, we also discuss an application of this result to the study of the p-rank of cyclic coverings of curves in positive characteristic. |
| Keywords | abelian variety torsion point curve p-rank |
| Published Date | 2022-01 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume64 |
| Issue | issue1 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 1 |
| End Page | 11 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| JaLCDOI | 10.18926/AMO/62773 |
|---|---|
| FullText URL | 75_5_601.pdf |
| Author | Mitsuhashi, Toshiharu| |
| Abstract | Research suggests that the fundamental concepts of epidemiology cannot be sufficiently learned in traditional lectures, and interactive learning is necessary. However, few studies have investigated interactive epidemiology education in general, or peer instruction (PI) in particular. This study investigated the effect of PI. Study par-ticipants were fourth-year medical students. The attitude of participants in regard to PI learning was examined in a non-PI and a PI group. The Survey of Attitudes Toward Statistics (SATS) (containing six sub-categories) was conducted as a learning-attitudes index. The pre- and post-lecture scores were compared between the non-PI and PI groups using double robust (DR) estimation. The non-PI and PI groups consisted of 20 and 121 student participants, respectively. In DR estimation, affect exhibited the lowest SATS score changes, at −0.51 (95% confidence interval −0.78 to −0.24; p-value < 0.001), whereas effort exhibited the highest score changes of 0.01 (95% confidence interval −0.30 to 0.32; p-value = 0.952). The epidemiology lecture with PI did not increase the SATS scores. This might be due to issues related to the experimental design. Further research investigating the effects of interactive epidemiology education, it will be necessary to develop tools for assessing the learning of epidemiological concepts and to improve the research design. |
| Keywords | medical students peer instruction epidemiological education learning attitude double robust esti-mation |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2021-10 |
| Volume | volume75 |
| Issue | issue5 |
| Publisher | Okayama University Medical School |
| Start Page | 601 |
| End Page | 609 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2021 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 34703043 |
| Web of Science KeyUT | 000711561600007 |
| NAID | 120007166673 |
| FullText URL | fulltext20210928-2.pdf |
|---|---|
| Author | Katsuhara, Koki| Tachiki, Yuuya| Iritani, Ryosuke| Ushimaru, Atushi| |
| Keywords | Co-evolution evolutionary rescue inbreeding depression individual-based model mixed mating pollinator-mediated competition reproductive ecology selfing syndrome |
| Note | This is the peer reviewed version of the following article: [Katsuhara, K. R., Tachiki, Y., Iritani, R., & Ushimaru, A. (2021). The eco-evolutionary dynamics of prior selfing rates promote coexistence without niche partitioning under conditions of reproductive interference. Journal of Ecology, 00, 1–13], which has been published in final form at [https://doi.org/10.1111/1365-2745.13768]. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-ArchivedVersions. This article may not be enhanced, enriched or otherwise transformed into a derivative work, without express permission from Wileyor by statutory rights under applicable legislation. Copyright notices must not be removed, obscured or modified. The article must be linked toWiley’s version of record on Wiley Online Library and any embedding, framing or otherwise making available the article or pages thereof bythird parties from platforms, services and websites other than Wiley Online Library must be prohibited. This fulltext is available in Sep. 2022.| |
| Published Date | 2021-9-16 |
| Publication Title | Journal of Ecology |
| Volume | volume109 |
| Issue | issue11 |
| Publisher | Wiley |
| Start Page | 3916 |
| End Page | 3928 |
| ISSN | 0022-0477 |
| NCID | AA00696840 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © 2021 British Ecological Society |
| File Version | author |
| DOI | 10.1111/1365-2745.13768 |
| Web of Science KeyUT | 000696397800001 |
| Related Url | isVersionOf https://doi.org/10.1111/1365-2745.13768 |
| FullText URL | fulltext.pdf |
|---|---|
| Author | Masuda, Takahiko| Ang, Daniel G.| Hutzler, Nicholas R.| Meisenhelder, Cole| Sasao, Noboru| Uetake, Satoshi| Wu, Xing| DeMille, David| Gabrielse, Gerald| Doyle, John M.| Yoshimura, Koji| |
| Published Date | 2021-05-24 |
| Publication Title | Optics Express |
| Volume | volume29 |
| Issue | issue11 |
| Publisher | Optical Soc Amer |
| Start Page | 16914 |
| End Page | 16926 |
| ISSN | 1094-4087 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement |
| File Version | publisher |
| DOI | 10.1364/OE.424460 |
| NAID | 120007053367 |
| Web of Science KeyUT | 000654369300081 |
| Related Url | isVersionOf https://doi.org/10.1364/OE.424460 |
| FullText URL | fulltext.pdf |
|---|---|
| Author | Inoue, Komaki| Takahagi, Kotaro| Kouzai, Yusuke| Koda, Satoru| Shimizu, Minami| Uehara-Yamaguchi, Yukiko| Nakayama, Risa| Kita, Toshie| Onda, Yoshihiko| Nomura, Toshihisa| Matsui, Hidetoshi| Nagaki, Kiyotaka| Nishii, Ryuei| Mochida, Keiichi| |
| Published Date | 2020-09 |
| Publication Title | Nar Genomics and Bioinformatics |
| Volume | volume2 |
| Issue | issue3 |
| Publisher | Oxford Univ Press |
| Start Page | lqaa067 |
| ISSN | 2631-9268 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © The Author(s) 2020. |
| File Version | publisher |
| PubMed ID | 33575616 |
| DOI | 10.1093/nargab/lqaa067 |
| NAID | 120007037378 |
| Web of Science KeyUT | 000645609500016 |
| Related Url | isVersionOf https://doi.org/10.1093/nargab/lqaa067 |
| FullText URL | fulltext.pdf |
|---|---|
| Author | Horigane, K| Takeuchi, K| Hyakumura, D| Horie, R| Sato, T| Muranaka, T| Kawashima, K| Ishii, H| Kubozono, Y| Orimo, S| Isobe, M| Akimitsu, J| |
| Keywords | supreconductivity iridium-silicide spin–orbit coupling |
| Published Date | 2019-09-24 |
| Publication Title | New Journal of Physics |
| Volume | volume21 |
| Publisher | IOP Publishing |
| Start Page | 093056 |
| ISSN | 1367-2630 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © 2019 The Author(s). |
| File Version | publisher |
| DOI | 10.1088/1367-2630/ab4159 |
| Web of Science KeyUT | 000488013000013 |
| Related Url | isVersionOf https://doi.org/10.1088/1367-2630/ab4159 |
| JaLCDOI | 10.18926/AMO/61437 |
|---|---|
| FullText URL | 75_1_71.pdf |
| Author | Sanki, Tomoaki| Tetsunaga, Tomonori| Furumatsu, Takayuki| Yamada, Kazuki| Kawamura, Yoshi| Ozaki, Toshifumi| |
| Abstract | Intra-operative acetabular fracture is a total hip arthroplasty complication that can occur during cementless cup insertion, especially in osteoporotic patients. We conducted this biomechanical study to investigate the impact resistance of the acetabulum with simulated bones of different density by drop-weight impact testing. Low- and high-density polyurethane foam blocks were used as osteoporotic and healthy bone models, respectively. Polyurethane blocks were used as the acetabular cancellous bone. Composite sheets were used as the acetabu-lum’s medial cortex. The testing revealed that the osteoporotic bone model’s impact resistance was significantly lower than that the healthy bone model’. In the healthy bone model, even thin acetabular cancellous bone with ≥ 1 mm acetabulum medial cortex was less likely to fracture. In the osteoporotic bone model, fracture was pos-sible without ≥ 1 mm medial cortex of the acetabulum and thick acetabular cancellous bone. Although impac-tion resistance differs due to bone quality, the impaction resistance in this osteoporotic bone model was equiv-alent to that healthy bone model’s when a thick medial wall was present. To avoid intra-operative acetabulum fracture, surgeons should consider both the bone quality and the thicknesses of the medial cortex and acetabu-lar cancellous bone. |
| Keywords | intra-operative acetabular fracture drop weight impact testing total hip arthroplasty impact resistance |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2021-02 |
| Volume | volume75 |
| Issue | issue1 |
| Publisher | Okayama University Medical School |
| Start Page | 71 |
| End Page | 77 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2021 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 33649616 |
| JaLCDOI | 10.18926/ATM/61436 |
|---|---|
| FullText URL | 75_1_63.pdf |
| Author | Tada, Katsuhiko| Miyagi, Yasunari| Nakamura, Kazue| Yorozu, Moe| Fukushima, Emi| Kumazawa, Kazumasa| Nakamura, Makoto| Kageyama, Misao| |
| Abstract | We used a differential equation to identify the biological relationship between the maternal prepregnancy body mass index (BMI) and lactation on postpartum day 4 in Japanese women with neonatal separation. This retro-spective observational study included 252 mothers (135 primiparas, 117 multiparas) whose singleton neonates were admitted to a neonatal ICU. We formulated hypotheses based on breast anatomy to analyze the relation-ship between the expressed milk obtained on postpartum day 4 and the maternal prepregnancy BMI with the following differential equation: y’(x) = k y(x)/x, where k is the constant, x is the prepregnancy BMI, and y is the expressed milk volume. The formula was then obtained as y(x) = axk, where a is the constant. The Akaike information criterion (AIC) was used to estimate the regression equation with the maximum likelihood for primiparas and multiparas. The best criteria for BMI determined by the AIC were 20.89 kg/m2 in primiparas and 20.19 kg/m2 in multiparas. These were the optimal BMI values for lactation, coinciding with the median prepregnancy BMI in the study population (20.78 kg/m2 in primiparas and 20.06 kg/m2 in multiparas). The formula based on biomathematics might help establish the biological relationship between prepregnancy BMI and breastmilk volume. |
| Keywords | biomathematics body mass index expressed milk lactation |
| Amo Type | Original Article |
| Publication Title | Acta Medica Okayama |
| Published Date | 2021-02 |
| Volume | volume75 |
| Issue | issue1 |
| Publisher | Okayama University Medical School |
| Start Page | 63 |
| End Page | 69 |
| ISSN | 0386-300X |
| NCID | AA00508441 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | CopyrightⒸ 2021 by Okayama University Medical School |
| File Version | publisher |
| Refereed | True |
| PubMed ID | 33649615 |
| FullText URL | fulltext.pdf |
|---|---|
| Author | Alizadeh, Roghayyeh| Nishi, Tatsushi| Bagherinejad, Jafar| Bashiri, Mahdi| |
| Keywords | maximal covering location problem capacitated facility modularity multi-period Lagrangian decomposition heuristic |
| Published Date | 2021-01-04 |
| Publication Title | Applied Sciences |
| Volume | volume11 |
| Issue | issue1 |
| Publisher | MDPI |
| Start Page | 397 |
| ISSN | 2076-3417 |
| Content Type | Journal Article |
| language | English |
| OAI-PMH Set | 岡山大学 |
| Copyright Holders | © 2021 by the authors. |
| File Version | publisher |
| DOI | 10.3390/app11010397 |
| Web of Science KeyUT | 000605805900001 |
| Related Url | isVersionOf https://doi.org/10.3390/app11010397 |
| FullText URL | mjou_008_189_194.pdf |
|---|---|
| Author | Nagahara, Takasi| Nobusawa, Nobuo| Tominaga, Hisao| |
| Published Date | 1958-12 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume8 |
| Issue | issue2 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 189 |
| End Page | 194 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright©1958 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_008_181_188.pdf |
|---|---|
| Author | Nagahara, Takashi| |
| Published Date | 1958-12 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume8 |
| Issue | issue2 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 181 |
| End Page | 188 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright©1958 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_008_143_179.pdf |
|---|---|
| Author | Otsuki, Tominosuke| |
| Published Date | 1958-12 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume8 |
| Issue | issue2 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 143 |
| End Page | 179 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright©1958 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_008_133_142.pdf |
|---|---|
| Author | Nagahara, Takasi| Onodera, Takesi| Tominaga, Hisao| |
| Published Date | 1958-12 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume8 |
| Issue | issue2 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 133 |
| End Page | 142 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright©1958 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_008_125_131.pdf |
|---|---|
| Author | Sugawara, Masahiro| |
| Published Date | 1958-12 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume8 |
| Issue | issue2 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 125 |
| End Page | 131 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright©1958 by the Editorial Board of Mathematical Journal of Okayama University |
| FullText URL | mjou_008_117_123.pdf |
|---|---|
| Author | Tominaga, Hisao| |
| Published Date | 1958-12 |
| Publication Title | Mathematical Journal of Okayama University |
| Volume | volume8 |
| Issue | issue2 |
| Publisher | Department of Mathematics, Faculty of Science, Okayama University |
| Start Page | 117 |
| End Page | 123 |
| ISSN | 0030-1566 |
| NCID | AA00723502 |
| Content Type | Journal Article |
| language | English |
| Copyright Holders | Copyright©1958 by the Editorial Board of Mathematical Journal of Okayama University |
