検索結果 13601 件
| JaLCDOI | 10.18926/44499 |
|---|---|
| フルテキストURL | mfe_045_046_053.pdf |
| 著者 | Nogami, Yasuyuki| Yanagi, Erika| Izuta, Tetsuya| Morikawa, Yoshitaka| |
| 抄録 | Recently, composite order pairing–based cryptographies have received much attention. The composite order needs to be as large as the RSA modulus. Thus, they require a certain pairing–friendly elliptic curve that has such a large composite order. This paper proposes an efficient algorithm for generating an ordinary pairing–friendly elliptic curve of the embedding degree 1 whose order has two large prime factors as the RSA modulus. In addition, the generated pairing–friendly curve has an efficient structure for the Gallant–Lambert–Vanstone (GLV) method. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2011-01 |
| 巻 | 45巻 |
| 開始ページ | 46 |
| 終了ページ | 53 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 120002905955 |
| JaLCDOI | 10.18926/44498 |
|---|---|
| フルテキストURL | mfe_045_036_045.pdf |
| 著者 | Kanatani, Kenichi| Niitsuma, Hirotaka| |
| 抄録 | We present a new method for optimally computing the 3-D rotation from two sets of 3-D data. Unlike 2-D data, the noise in 3-D data is inherently inhomogeneous and anisotropic, reflecting the characteristics of the 3-D sensing used. To cope with this, Ohta and Kanatani introduced a technique called “renormalization”. Following them, we represent a 3-D rotation in terms of a quaternion and compute an exact maximum likelihood solution using the FNS of Chojnacki et al. As an example, we consider 3-D data obtained by stereo vision and optimally compute the 3-D rotation by analyzing the noise characteristics of stereo reconstruction. We show that the widely used method is not suitable for 3-D data. We confirm that the renormalization of Ohta and Kanatani indeed computes almost an optimal solution and that, although the difference is small, the proposed method can compute an even better solution. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2011-01 |
| 巻 | 45巻 |
| 開始ページ | 36 |
| 終了ページ | 45 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 80021759250 |
| JaLCDOI | 10.18926/44497 |
|---|---|
| フルテキストURL | mfe_045_027_036.pdf |
| 著者 | Kanatani, Kenichi| Sugaya, Yasuyuki| |
| 抄録 | We describe in detail the algorithm of bundle adjustment for 3-D reconstruction from multiple images based on our latest research results. The main focus of this paper is on the handling of camera rotations and the efficiency of computation and memory usage when the number of variables is very large; an appropriate consideration of this is the core of the implementation of bundle adjustment. Computing the fundamental matrix from two views and reconstructing the 3-D structure from multiple views, we evaluate the performance of our algorithm and discuses technical issues of bundle adjustment implementation. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2011-01 |
| 巻 | 45巻 |
| 開始ページ | 27 |
| 終了ページ | 35 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 80021759249 |
| JaLCDOI | 10.18926/44496 |
|---|---|
| フルテキストURL | mfe_045_015_026.pdf |
| 著者 | Kanatani, Kenichi| Rangrajan, Prasanna| Sugaya, Yasuyuki| Niitsuma, Hirotaka| |
| 抄録 | We present a new least squares (LS) estimator, called “HyperLS”, specifically designed for parameter estimation in computer vision applications. It minimizes the algebraic distance under a special scale normalization, which is derived by rigorous error analysis in such a way that statistical bias is removed up to second order noise terms. Numerical experiments suggest that our HyperLS is far superior to the standard LS and comparable in accuracy to maximum likelihood (ML), which is known to produce highly accurate results in image applications but may fail to converge if poorly initialized. Our HyperLS is a perfect candidate for ML initialization. In addition, we discuss how image-based inference problems have different characteristics form conventional statistical applications, with a view to serving as a bridge between mathematicians and computer engineers. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2011-01 |
| 巻 | 45巻 |
| 開始ページ | 15 |
| 終了ページ | 26 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 120002905952 |
| JaLCDOI | 10.18926/44495 |
|---|---|
| フルテキストURL | mfe_045_001_014.pdf |
| 著者 | Akiyoshi, Tatsuro| Imai, Jun| Konishi, Masami| |
| 抄録 | This paper presents a method of the controller design for the handling machine by using dsPIC(Digital Signal Processor + Peripheral Interface Controller). Recently, many manufacturing robots are operated in manufacturing facilities, with the aim of labor, cost saving, and improvement of the productivity. Such robots need to have positioning performance of high precision and simultaneously to save cost. In this paper, a digital optimal servo controller is designed, and it is implemented into our barebones controller which involves dsPIC. We have designed and manufactured the controller which is added suitable peripherals to improve the consistency between the mechanical machine operating in continuous time and controller in discrete time. The significance of this research is that digital implementation of the embedded system which has performance-limitation has ensured a comparable result, against the one with PC which has broad utility. When it is used as a controller, it is possible to restrain product prices greatly equivalent PC precision. We demonstrate potential that good control can be achieved even with low cost. Our research has lead to the viability of lower cost and higher performance system for the production process at factories. |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 発行日 | 2011-01 |
| 巻 | 45巻 |
| 開始ページ | 1 |
| 終了ページ | 14 |
| ISSN | 1349-6115 |
| 言語 | 英語 |
| 著作権者 | Copyright © by the authors |
| 論文のバージョン | publisher |
| NAID | 120002905951 |
| 著者 | Faculty of Engineering, Okayama University| |
|---|---|
| 発行日 | 2011-01 |
| 出版物タイトル | Memoirs of the Faculty of Engineering, Okayama University |
| 巻 | 45巻 |
| 資料タイプ | その他 |
| 著者 | Agatsuma, Satoshi| |
|---|---|
| 発行日 | 2011-03-25 |
| 出版物タイトル | 文化共生学研究 |
| 巻 | 10巻 |
| 資料タイプ | 紀要論文 |
| JaLCDOI | 10.18926/44451 |
| 著者 | 岡山大学大学院社会文化科学研究科| |
|---|---|
| 発行日 | 2011-03-25 |
| 出版物タイトル | 岡山大学大学院社会文化科学研究科紀要 |
| 巻 | 31巻 |
| 資料タイプ | その他 |
| 著者 | 岡山大学教師教育開発センター| |
|---|---|
| 発行日 | 2011-03-10 |
| 出版物タイトル | 岡山大学教師教育開発センター紀要 |
| 巻 | 1巻 |
| 資料タイプ | その他 |
| フルテキストURL | Pteridines_019_3_072_078.pdf |
|---|---|
| 著者 | Hanaya, Tadashi| Torigoe, Kiyoshi| Soranaka, Kazuyuki| Fujita, Hiroshi| Yamamoto, Hiroshi| Pfleiderer, Wolfgang| |
| キーワード | biopterin D-riboside pterin glycoside glycosylation protecting groups |
| 発行日 | 2008-09 |
| 出版物タイトル | Pteridines |
| 巻 | 19巻 |
| 号 | 3号 |
| 出版者 | International Society of Pteridinology |
| 開始ページ | 72 |
| 終了ページ | 78 |
| ISSN | 0933-4807 |
| 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 | Copyright © International Society of Pteridinology |
| 論文のバージョン | publisher |
| DOI | 10.1515/pteridines.2008.19.1.72 |
| Web of Science KeyUT | 000265600000002 |
| オフィシャル URL | http://www.pteridines.sk/center.php?act=V&volId=119| |
| 著者 | Hanaya, Tadashi| Baba, Hiroki| Kanemoto, Mitsunori| Yamamoto, Hiroshi| |
|---|---|
| 発行日 | 2008-09-03 |
| 出版物タイトル | Heterocycles |
| 巻 | 76巻 |
| 号 | 1号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | Hanaya, Tadashi| Baba, Hiroki| Toyota, Hiroki| Yamamoto, Hiroshi| |
|---|---|
| 発行日 | 2009-09-19 |
| 出版物タイトル | Tetrahedron |
| 巻 | 65巻 |
| 号 | 38号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | Hanaya, Tadashi| Yamamoto, Hiroshi| Pfleiderer, Wolfgang| |
|---|---|
| 発行日 | 2009-12 |
| 出版物タイトル | Pteridines |
| 巻 | 20巻 |
| 号 | Special Issue号 |
| 資料タイプ | 学術雑誌論文 |
| フルテキストURL | Pteridines_021_3_079_083.pdf |
|---|---|
| 著者 | Hanaya, Tadashi| Hattori, Takafumi| Takayama, Daisuke| Yamamoto, Hiroshi| |
| キーワード | neopterin glycoside D-glucronic acid glycosylation protecting groups |
| 発行日 | 2010-09 |
| 出版物タイトル | Pteridines |
| 巻 | 21巻 |
| 号 | 3号 |
| 出版者 | International Society of Pteridinology |
| 開始ページ | 79 |
| 終了ページ | 83 |
| ISSN | 0933-4807 |
| 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 | Copyright © International Society of Pteridinology |
| 論文のバージョン | publisher |
| DOI | 10.1515/pteridines.2010.21.1.79 |
| Web of Science KeyUT | 000284333900003 |
| オフィシャル URL | http://www.pteridines.sk/center.php?act=V&volId=140| |
| 著者 | Hanaya, Tadashi| Baba, Hiroki| Ejiri, Kazumasa| Yamamoto, Hiroshi| |
|---|---|
| 発行日 | 2010-03-01 |
| 出版物タイトル | Heterocycles |
| 巻 | 80巻 |
| 号 | 2号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | Hanaya, Tadashi| Baba, Hiroki| Yamamoto, Hiroshi| |
|---|---|
| 発行日 | 2009-02-01 |
| 出版物タイトル | Heterocycles |
| 巻 | 77巻 |
| 号 | 2号 |
| 資料タイプ | 学術雑誌論文 |
| 著者 | 吉川 賢| 井上 正樹| 吉森 一道| 中島 敦司| 寺南 智弘| 松尾 奈緒子| 萬城 遼| 宮本 千晴| |
|---|---|
| 発行日 | 2011-02-01 |
| 出版物タイトル | 岡山大学農学部学術報告 |
| 巻 | 100巻 |
| 資料タイプ | 紀要論文 |
| 著者 | 岡山大学大学院教育学研究科| |
|---|---|
| 発行日 | 2011-02-25 |
| 出版物タイトル | 岡山大学大学院教育学研究科研究集録 |
| 巻 | 146巻 |
| 資料タイプ | その他 |
| JaLCDOI | 10.18926/AMO/43832 |
|---|---|
| フルテキストURL | 65_1_59.pdf |
| 著者 | Yasuhara, Takao| Miyoshi, Yasuyuki| Date, Isao| |
| 抄録 | A case of a Chiari malformation with an extraordinarily thick occipital bone is described. The thick occipital bone might make the posterior fossa narrow with consequent herniation of the cerebellar tonsils to the foramen magnum and formation of a syrinx. At dural plasty, well-developed marginal and occipital sinuses should be deliberately handled with the preservation of normal venous drainage. This case gives us the essence of the occurrence mechanisms of Chiari malformation and foramen magnum decompression. |
| キーワード | Chiari malformation dural plasty foramen magnum decompression syrinx venous drainage |
| Amo Type | Case Report |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2011-02 |
| 巻 | 65巻 |
| 号 | 1号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 59 |
| 終了ページ | 61 |
| 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Ⓒ 2011 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 21339798 |
| Web of Science KeyUT | 000287620500009 |
| JaLCDOI | 10.18926/AMO/43831 |
|---|---|
| フルテキストURL | 65_1_55.pdf |
| 著者 | Miki, Kentaroh| Orita, Yorihisa| Kumase, Fumiaki| Sugaya, Akiko| Hirai, Misato| Noyama, Yasuyuki| Nakai, Kiyoko| Narita, Akiko| Seguchi, Jiroh| |
| 抄録 | Orbital emphysema is an abnormal condition in which air is present within the orbit. We report a rare case of a 19-year-old man who suffered syncopic attacks caused by sniffles following orbital emphysema as a result of trauma. Treating rhinitis is important in patients with orbital emphysema, and patients with cardiac disorders in addition to those with this condition must be warned about the risks of sniffles, sneezing, or nose blowing. |
| キーワード | emphysema syncopic attack sniffle trauma vagovagal reflex |
| Amo Type | Case Report |
| 出版物タイトル | Acta Medica Okayama |
| 発行日 | 2011-02 |
| 巻 | 65巻 |
| 号 | 1号 |
| 出版者 | Okayama University Medical School |
| 開始ページ | 55 |
| 終了ページ | 57 |
| 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Ⓒ 2011 by Okayama University Medical School |
| 論文のバージョン | publisher |
| 査読 | 有り |
| PubMed ID | 21339797 |
| Web of Science KeyUT | 000287620500008 |