検索結果 47501 件
| JaLCDOI | 10.18926/AMO/62813 |
|---|---|
| フルテキストURL | 75_6_725.pdf |
| 著者 | Matsumoto, Hiroshi| Kimata, Yoshihiro| Ota, Tomoyuki| Sugiyama, Narushi| Onoda, Satoshi| Makino, Takuma| Takeda, Seiko| Mizukawa, Nobuyoshi| |
| 抄録 | The long-term changes in tissues implanted in the oral cavity and pharynx after head and neck reconstruction have not been fully evaluated. This study aimed to clarify the morphological changes, long-term durability, and potential for secondary carcinogenesis in such tissues. In our single-center study, the rough morphological changes in 54 cases of intraoral and pharyngeal skin and mucosal flaps were evaluated more than 10 years after flap transfer. In addition, the literature on the development of second carcinomas from skin flaps was reviewed. The mean follow-up period for transferred flaps was 148 months. The reconstruction areas and the probability of morphological changes were significantly correlated (p=0.006), especially in cases with tongue, lower gingiva, and buccal mucosal reconstruction. Free jejunal flap surfaces were well maintained, whereas tubed skin flaps showed severe morphological changes in cases with pharyngeal reconstruction. None of the flaps in our series developed second primary carcinomas. Skin flaps generally had good durability for > 10 years in intraoral environments, while mucosal flaps had better durability for pharyngeal reconstruction. Second squamous carcinomas arising from skin flaps are extremely rare; however, surgeons should take this possibility into consideration and conduct meticulous and long-term follow-up. |
| キーワード | skin flap mucosal flap oral reconstruction morphological change second primary carcinoma |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 725 |
| 終了ページ | 734 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955541 |
| NAID | 120007180279 |
| JaLCDOI | 10.18926/AMO/62812 |
|---|---|
| フルテキストURL | 75_6_719.pdf |
| 著者 | Uehara, Shinya| Fujio, Kei| Yamasaki, Tomoya| Otsuki, Hideo| |
| 抄録 | Differentiating patients by age and causative bacterial morphology might aid in making the appropriate choice of antimicrobial agent when treating acute uncomplicated cystitis. In this retrospective analysis, the non-susceptibility rates of the causative bacteria to cefcapene-pivoxil (CFPN-PI) and levofloxacin (LVFX) were determined after dividing patients with acute uncomplicated cystitis by age group (15-54 and 55-74 years old) and by bacterial morphology: gram-positive cocci (GPC) or gram-negative rod (GNR). The overall non-susceptibility rates for CFPN-PI and LVFX were 19.4% and 15.3%, respectively. When the subjects were divided by age, only the non-susceptibility rate for LVFX in the younger group significantly decreased (to 8.7%). When the groups were divided by both age and bacterial morphology, the younger GNR group had non-susceptibility rates of 6.9% to CFPN-PI and 7.8% to LVFX, whereas the younger GPC group showed 10.2% non-susceptibility to LVFX. The older GNR group showed 9.8% non-susceptibility to CFPN-PI, while the older GPC group showed 7.2% non-susceptibility to LVFX. All the non-susceptibility rates were lower than 10.2% in the sub-divided groups. Differentiating patients by age and the morphology of causative bacteria can aid in making the appropriate choice of antimicrobial agent and may improve treatment outcomes in patients with acute uncomplicated cystitis. |
| キーワード | acute uncomplicated cystitis oral antimicrobial agents antimicrobial susceptibility menopause Gram stain |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 719 |
| 終了ページ | 724 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955540 |
| Web of Science KeyUT | 000735297900008 |
| NAID | 120007180280 |
| JaLCDOI | 10.18926/AMO/62811 |
|---|---|
| フルテキストURL | 75_6_713.pdf |
| 著者 | Aoyama, Tatsuro| Ogiwara, Toshihiro| Ito, Kiyoshi| Miyaoka, Yoshinari| Fujii, Yu| Hanaoka, Yoshiki| Hasegawa, Takatoshi| Watanabe, Gen| Seguchi, Tatsuya| Hongo, Kazuhiro| |
| 抄録 | The consistency of spinal meningiomas is important to consider when performing tumor removal surgery. This study evaluated the correlations between spinal meningioma consistency and both preoperative computed tomography (CT) values and histopathological subtypes. Fifteen consecutive patients who underwent surgical resection of spinal meningioma at our institution were identified, and preoperative CT values and the signal intensity of T2-weighted magnetic resonance images of the tumor were determined retrospectively. The consistency of the spinal meningioma was defined based on the ultrasonic surgical aspirator output during tumor debulking. Patients were assigned to 2 groups: a soft group (n=4) and a hard group (n=11). The T2 signal intensity was significantly higher in the soft group than in the hard group (p=0.001). While the CT values were considerably higher in the hard group, the difference was not significant (p=0.19). Regarding the histopathological subtypes, psammomatous meningioma exhibited significantly higher CT values than meningothelial meningioma (p=0.019); however, there was a higher frequency of hard tumors in meningothelial meningioma cases than in psammomatous meningioma cases. Although neither robust correlations between tumor consistency and CT values nor a relationship between tumor consistency and histopathological subtype has been established, these results might help with the perioperative manegement of spinal tumors. |
| キーワード | calcification computed tomography psammoma body spinal meningioma |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 713 |
| 終了ページ | 718 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955539 |
| Web of Science KeyUT | 000735297900007 |
| NAID | 120007180281 |
| JaLCDOI | 10.18926/AMO/62810 |
|---|---|
| フルテキストURL | 75_6_705.pdf |
| 著者 | Iwata, Takehiro| Maruyama, Yuki| Kawada, Tatsushi| Sadahira, Takuya| Katayama, Satoshi| Takamoto, Atsushi| Sako, Tomoko| Wada, Koichiro| Edamura, Kohei| Kobayashi, Yasuyuki| Araki, Motoo| Watanabe, Masami| Watanabe, Toyohiko| Nasu, Yasutomo| |
| 抄録 | Optimal neoadjuvant hormone therapy (NHT) for reducing prostate cancer (PC) patients’ prostate volume pre-brachytherapy is controversial. We evaluated the differential impact of neoadjuvant gonadotropin-releasing hormone (GnRH) antagonist versus agonist on post-brachytherapy testosterone recovery in 112 patients treated pre-brachytherapy with NHT (GnRH antagonist, n=32; GnRH agonists, n=80) (Jan. 2007-June 2019). We assessed the effects of patient characteristics and a GnRH analogue on testosterone recovery with logistic regression and a propensity score analysis (PSA). There was no significant difference in the rate of testosterone recovery to normal levels (> 300 ng/dL) between the GnRH antagonist and agonists (p=0.07). The GnRH agonists induced a significantly more rapid testosterone recovery rate at 3 months post-brachytherapy versus the GnRH antagonist (p<0.0001); there was no difference in testosterone recovery at 12 months between the GnRH antagonist/agonists (p=0.8). In the multivariate analysis, no actor was associated with testosterone recovery. In the PSA, older age and higher body mass index (BMI) were significantly associated with longer testosterone recovery. Post-brachytherapy testosterone recovery was quicker with the neoadjuvant GnRH agonists than the antagonist, and the testosterone recovery rate was significantly associated with older age and higher BMI. Long-term follow-ups are needed to determine any differential effects of GnRH analogues on the quality of life of brachytherapy-treated PC patients. |
| キーワード | testosterone recovery GnRH antagonist GnRH agonist brachytherapy prostate cancer |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 705 |
| 終了ページ | 711 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955538 |
| Web of Science KeyUT | 000735297900006 |
| NAID | 120007180282 |
| JaLCDOI | 10.18926/AMO/62809 |
|---|---|
| フルテキストURL | 75_6_699.pdf |
| 著者 | Kawano, Tetsuya| Miyakoshi, Naohisa| Tsuchie, Hiroyuki| Kashiwagura, Takeshi| Kobayashi, Moto| Aonuma, Hiroshi| Sugimura, Yusuke| Shimada, Yoichi| |
| 抄録 | Glucocorticoid-induced osteoporosis (GIOP) is one of the side effects associated with glucocorticoid (GC) therapy. In 2014, the Japanese Society for Bone and Mineral Research (JSBMR) provided new guidelines for the management and treatment of GIOP. The aim of the present study was to clarify the prevalence of patients with rheumatoid arthritis (RA) requiring treatment according to the new guidelines and to identify risk factors associated with lack of treatment in these patients. Patients in the 2018 Akita Orthopedic group on Rheumatoid Arthritis (AORA) database were enrolled. Of 2,234 patients with RA in the database, 683 (30.6%) met the 2014 JSBMR guideline treatment criteria, and 480 (70.3%) had been treated. The untreated group included a larger number of males, younger patients, and patients treated in clinics rather than hospital (p<0.001, p=0.015, and p<0.001, respectively). Multivariate analyses found that male sex, younger age, and clinic-based RA care were significant risk factors associated with lack of treatment (p<0.001, p=0.013, and p<0.001, respectively). Thus, male sex, younger age, and clinic-based care were identified as risk factors |
| キーワード | glucocorticoid glucocorticoid-induced osteoporosis rheumatoid arthritis osteoporosis osteopenia |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 699 |
| 終了ページ | 704 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955537 |
| Web of Science KeyUT | 000735297900005 |
| NAID | 120007180283 |
| JaLCDOI | 10.18926/AMO/62808 |
|---|---|
| フルテキストURL | 75_6_691.pdf |
| 著者 | Kato, Yuji| Hayashi, Takeshi| Kato, Ritsushi| Uchino, Akira| Takao, Masaki| Takahashi, Shinichi| |
| 抄録 | Although diagnostic and therapeutic strategies for acute stroke patients in Japan depend largely on magnetic resonance imaging (MRI), patients with cardiac implantable electronic devices (CIED) must still rely on com-puted tomography (CT). We retrospectively analyzed clinical and neuroimaging data of ischemic stroke patients with CIED treated at our hospital. Forty-five patients were enrolled in the study. Patients were divided into two groups according to whether corresponding lesions were detected (group A, n = 21) or not detected (group B, n = 24) by the first brain CT. We also evaluated in detail the clinical courses of patients who arrived at hospital within therapeutic time windows for recanalization therapy. Negative fresh infarct in the first CT was associated, though not significantly, with early onset-to-arrival time and subcortical white matter infarction. Five patients did not undergo recanalization therapy because their families did not agree to the procedure. The reasons for their lack of consent included inadequate information about the safety and efficacy of recanalization therapy because MRI could not be performed. Our study confirmed delayed detection of the corresponding lesion and undertreatment for acute stroke in patients with CIED. |
| キーワード | stroke cardiac implantable electronic device computed tomography magnetic resonance imaging |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 691 |
| 終了ページ | 697 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955536 |
| Web of Science KeyUT | 000735297900004 |
| NAID | 120007180284 |
| JaLCDOI | 10.18926/AMO/62807 |
|---|---|
| フルテキストURL | 75_6_685.pdf |
| 著者 | Yamashita, Mampei| Kuroki, Tamotsu| Hamada, Takashi| Hirayama, Takanori| Tokunaga, Takayuki| Yamanouchi, Kosho| Takeshita, Hiroaki| Maeda, Shigeto| |
| 抄録 | Magnetic resonance cholangiopancreatography (MRCP) is a non-invasive imaging technique that provides high-quality visualization of the biliary tree, including the gallbladder. This study aimed to evaluate the useful-ness of preoperative MRCP for acute cholecystitis in predicting technical difficulties during laparoscopic chole-cystectomy (LC). A total of 168 patients who underwent LC with preoperative MRCP were enrolled in this study. Patients were divided into two groups according to preoperative MRCP findings: the visualized group (n = 126), in which the entire gallbladder could be visualized; and the non-visualized group (n = 42), in which the entire gallbladder could not be visualized. The perioperative characteristics and postoperative complica-tions of the two groups were retrospectively analyzed. Operation time was longer in the non-visualized group (median 101.5 vs. 143.5 min; p < 0.001). The non-visualized group had significantly more intraoperative blood loss than the visualized group (median 5 vs. 10 g; p = 0.05). The rate of conversion to open cholecystectomy was significantly higher in the non-visualized group (1.6 vs. 9.5%; p = 0.03). In conclusion, patients in the non- visualized group showed higher difficulty in performance of LC. Our MRCP-based classification is a simple and effective means of predicting difficulties in performing LC for acute cholecystitis. |
| キーワード | laparoscopic cholecystectomy magnetic resonance cholangiopancreatography acute cholecystitis gallbladder disease non-invasive imaging |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 685 |
| 終了ページ | 689 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955535 |
| Web of Science KeyUT | 000735297900003 |
| NAID | 120007180285 |
| JaLCDOI | 10.18926/AMO/62806 |
|---|---|
| フルテキストURL | 75_6_677.pdf |
| 著者 | Tani Kazumasa| Mitsui, Takashi| Mishima, Sakurako| Ohira, Akiko| Maki, Jota| Eto, Eriko| Hayata, Kei| Nakamura, Keiichiro| Masuyama, Hisashi| |
| 抄録 | Extravillous trophoblast (EVT) invasion is important for embryo implantation, placental development, and successful remodeling of the uterine spiral artery. Endocrine gland derived-vascular endothelial growth factor (EG-VEGF) and matrix metalloproteinases (MMPs) are implicated in EVT invasion; however, the high con-centrations found in pregnancy pathologies have not been investigated in non-tumor trophoblasts. The roles of EG-VEGF, prokineticin receptors (PROKR1/2), MMP-2, and MMP-9 in EVT invasion during spiral artery remodeling were evaluated using human EVT from HTR-8/SVneo cell lines. The expression of MMP-2, MMP-9, and mitogen-activated protein kinase (MAPK), and Akt pathways in HTR-8/SVneo cells treated with recom-binant EG-VEGF alongside anti-PROKR1 and/or anti-PROKR2 antibodies was evaluated using quantitative reverse transcription-PCR and western blotting. Wound-healing and cell invasion assays were performed to assess the migration and invasion of these treated cells. Interestingly, 20 nM EG-VEGF activated ERK1/2 sig-naling and upregulated MMP-2 and MMP-9. This effect was suppressed by anti-PROKR2 antibody via ERK1/2 downregulation. Anti-PROKR2 antibody inhibited the migration and invasion of EG-VEGF-stimulated HTR-8/SVneo cells. Elevated concentrations of EG-VEGF enhance EVT invasion in a human trophoblast cell line by upregulating MMP-2 and MMP-9 via PROKR2. These new insights into the regulation of epithelial cell invasion may help in developing therapeutic interventions for placental-related diseases during pregnancy. |
| キーワード | endocrine gland-derived vascular endothelial growth factor prokineticin extravillous trophoblast matrix metalloproteinase obstetric diseases |
| Amo Type | Original Article |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 677 |
| 終了ページ | 684 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955534 |
| Web of Science KeyUT | 000735297900002 |
| NAID | 120007180286 |
| JaLCDOI | 10.18926/AMO/62805 |
|---|---|
| フルテキストURL | 75_6_671.pdf |
| 著者 | Gao, Shangze| Nishibori, Masahiro| |
| 抄録 | Histidine-rich glycoprotein (HRG) is a 75 kDa plasma protein that is synthesized in the liver of many verte-brates and present in their plasma at relatively high concentrations of 100-150 μg/mL. HRG is an abundant and well-characterized protein having a multidomain structure that enable it to interact with many ligands, func-tion as an adaptor molecule, and participate in numerous physiological and pathological processes. As a plasma protein, HRG has been reported to regulate vascular biology, including coagulation, fibrinolysis and angiogenesis, through its binding with several ligands (heparin, FXII, fibrinogen, thrombospondin, and plas-minogen) and interaction with many types of cells (endothelial cells, erythrocytes, neutrophils and platelets). This review aims to summarize the roles of HRG in maintaining vascular homeostasis and regulating angiogen-esis in various pathological conditions. |
| キーワード | histidine-rich glycoprotein vascular biology coagulation angiogenesis |
| Amo Type | Review |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2021-12 |
| 巻 | 75巻 |
| 号 | 6号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 671 |
| 終了ページ | 675 |
| 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 Ⓒ 2021 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 34955533 |
| Web of Science KeyUT | 000735297900001 |
| NAID | 120007180287 |
| フルテキストURL | mjou_064_215_225.pdf |
|---|---|
| 著者 | Hyodo, Fumitake| |
| 抄録 | This paper focuses on the theory of the Hecke rings associated with the general linear groups originally studied by Hecke and Shimura et al., and moreover generalizes its notions to Hecke rings associated with the automorphism groups of certain algebras. Then, in the case of the Heisenberg Lie algebra, we show an analog of the classical theory. |
| キーワード | Hecke rings noncommutative rings |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 215 |
| 終了ページ | 225 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_191_213.pdf |
|---|---|
| 著者 | Suzuki, Takeshi| Toyosawa, Yoshitaka| |
| 抄録 | We present a conjectural hook formula concerning the number of the standard tableaux on "cylindric" skew diagrams. Our formula can be seen as an extension of Naruse's hook formula for skew diagrams. Moreover, we prove our conjecture in some special cases. |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 191 |
| 終了ページ | 213 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_187_190.pdf |
|---|---|
| 著者 | Puthenpurakal, Tony J. | |
| 抄録 | Let K be a field and consider the standard grading on A = K[X1, ... ,Xd]. Let I, J be monomial ideals in A. Let In(J) = (In : J∞) be the nth symbolic power of I with respect to J. It is easy to see that the function fI J (n) = e0(In(J)/In) is of quasi-polynomial type, say of period g and degree c. For n ≫ 0 say fIJ (n) = ac(n)nc + ac−1(n)nc−1 + lower terms, where for i = 0, ... , c, ai : N → Q are periodic functions of period g and ac ≠0. In [4, 2.4] we (together with Herzog and Verma) proved that dim In(J)/In is constant for n ≫ 0 and ac(−) is a constant. In this paper we prove that if I is generated by some elements of the same degree and height I ≥ 2 then ac−1(−) is also a constant. |
| キーワード | quasi-polynomials monomial ideals symbolic powers |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 187 |
| 終了ページ | 190 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_153_186.pdf |
|---|---|
| 著者 | Nishiyama, Yuta| |
| 抄録 | In this article, we introduce some identities obtained from the inner products of some symmetric polynomials including the Macdonald polynomials. These identities are obtained not only from the inner products, but also by constructing certain bijections. The bijections are constructed through transforming the Young diagrams of partitions. |
| キーワード | Macdonald polynomials Young diagram bijective proof |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 153 |
| 終了ページ | 186 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_143_151.pdf |
|---|---|
| 著者 | Aokage, Kazuya | Tabata, Sumitaka | Yamada, Hiro-Fumi| |
| 抄録 | A quantum version of classical Sylvester-Franke theorem is presented. After reviewing some representation theory of the quantum group GLq (n, C), the commutation relations of the matrix elements are verified. Once quantum determinant of the representation matrix is defined, the theorem follows naturally |
| キーワード | Quantum general linear group Sylvester-Franke theorem |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 143 |
| 終了ページ | 151 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_117_141.pdf |
|---|---|
| 著者 | Wang, Qi| |
| 抄録 | As the first attempt to classify τ-tilting finite two-point algebras, we have determined the τ-tilting finiteness for minimal wild two-point algebras and some tame two-point algebras. |
| キーワード | Support τ-tilting modules τ-tilting finite two-point algebras |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 117 |
| 終了ページ | 141 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_109_116.pdf |
|---|---|
| 著者 | Yagita, Nobuaki| |
| 抄録 | Let p be a prime number. For a given finite group G, let gr*γ(BG) be the associated ring of the gamma filtration of the topological K-theory for the classifying space BG. In this paper, we study gr*γ(BG) when G are abelian p-groups which are not elementary. In particular, we extend related Chetard’s results for such 2-groups to p-groups for odd p. |
| キーワード | K-theory gamma fitration abelian p-group |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 109 |
| 終了ページ | 116 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_075_107.pdf |
|---|---|
| 著者 | Nagamachi, Ippei| |
| 抄録 | 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. |
| キーワード | good reduction, hyperbolic curve, polyucurve, ètale fundamental group. |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64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 | 107 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_063_073.pdf |
|---|---|
| 著者 | Tasaka, Koji| |
| 抄録 | 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. |
| キーワード | Multiple zeta values Period polynomials |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 63 |
| 終了ページ | 73 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_047_061.pdf |
|---|---|
| 著者 | Yamanaka, Satoshi| |
| 抄録 | 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. |
| キーワード | separable extension weakly separable extension skew polynomial ring derivation |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 47 |
| 終了ページ | 61 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |
| フルテキストURL | mjou_064_031_045.pdf |
|---|---|
| 著者 | Yamagishi, Hiroyuki| |
| 抄録 | 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. |
| キーワード | Discrete Sobolev inequality Discrete Laplacian Green’s matrix Reproducing relation |
| 発行日 | 2022-01 |
| 出版物タイトル | Mathematical Journal of Okayama University |
| 巻 | 64巻 |
| 号 | 1号 |
| 出版者 | Department of Mathematics, Faculty of Science, Okayama University |
| 開始ページ | 31 |
| 終了ページ | 45 |
| 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 ©2022 by the Editorial Board of Mathematical Journal of Okayama University |