1.

論文(リポジトリ)

論文(リポジトリ)
Matsumoto, Shuichi ; 松本, 修一
出版情報: Ryukyu mathematical journal.  12  pp.37-51,  1999-12-30.  Department of Mathematical Sciences, Faculty of Science, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/15167
概要: When we quantize a system consisting of a single particle, the proper time τ and the rest mass m are usually dealt with as parameters. In the present article, however, we introduce a new quantization rule by which these quantities are regarded as operators in addition to the position and the momentum. Applying this new rule to a scalar particle and to a particle with spin 1/2, we analyze the time evolution of the operator τ. In the former case, the evolution of the proper time perfectly matches several well-established classical formulae. In the case of the particle with spin 1/2, our new rule implies that an oscillation appears in the time evolution of the operator τ. This oscillation is similar to Zitterbewegung which is well-known in the ordinary Dirac theory. We formulate one physical effect of this oscillation by considering the interaction with a gravitational field, and estimate how small it is.
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2.

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Nishishiraho, Toshihiko ; 西白保, 敏彦
出版情報: Ryukyu mathematical journal.  12  pp.53-68,  1999-12-30.  Department of Mathematical Sciences, Faculty of Science, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/15949
概要: Inverse problems for the degree of the best approximation are discussed in the general settings in Banach spaces and sev eral refined results are obtained. Furthermore, applications are provided from the viewpoint of Fourier expansions associated with projections on Banach spaces.
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3.

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論文(リポジトリ)
Maeda, Takashi ; 前田, 高士
出版情報: Ryukyu mathematical journal.  12  pp.9-30,  1999-12-30.  Department of Mathematical Sciences, Faculty of Science, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/16091
概要: The third component of the graded minimal free resolution of the third Veronese subring of three variables over a field k of characteristic zero, is proved to be decomposed into {741} 【○!+】 {732} 【○!+】 {651} 【○!+】 {642} 【○!+】 {633} 【○!+】 {552} 【○!+】 {543} 【○!×】 S(-4) as GL_3(k)-module, where {n, m, l} is the irreducible representation of GL_3(k) with the highest weight (n, m, l) and S is the polynomial ring of ten variables. They are expressed applying the symbolic method of ternary cubic forms in the classical invariant theory.
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4.

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Kinjo, Yoshiyuki ; Miyagi, Yashushi ; 金城, 義行
出版情報: Ryukyu mathematical journal.  12  pp.1-7,  1999-12-30.  Department of Mathematical Sciences, Faculty of Science, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/16407
概要: We indicate that if a Hamiltonian system possesses a noncommutative Lie algebra of integrals defined on a 2n-dimensional manifold in the noncommutative sense and an annihilator is an ideal, the system is tangent to an n-dimensional manifold.
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5.

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Sudo, Takahiro ; 須藤, 隆洋
出版情報: Ryukyu mathematical journal.  12  pp.69-85,  1999-12-30.  Department of Mathematical Science, Faculty of Science, University of the Ryukyus
URL: http://hdl.handle.net/20.500.12000/24255
概要: This paper is devoted to the case by case study on structure of group C*-algebras of the Lie semi-direct products of the 1-dimensional real or complex Lie groups by connected Lie groups, in particular, by commutative Lie groups or the generalized Heisenberg Lie groups. As corollaries, we determine existence and nonexistence of projections of these special group C*-algebras in terms of groups, and obtain some generalized results for more general C* -algebras by another methods.
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6.

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里井, 洋一 ; Satoi, Yoichi
出版情報: 歴史と実践.  pp.105-122,  1999-12-15.  沖縄県歴史教育者協議会
URL: http://hdl.handle.net/20.500.12000/32579
概要: 論文
7.

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河名, 俊男 ; 管, 浩伸 ; 杉原, 薫 ; Kawana, Toshio ; Kan, Hironobu ; Sugihara, Kaoru
出版情報: 沖縄地理学会会報.  pp.7-7,  1999-12-10.  沖縄地理学会
URL: http://hdl.handle.net/20.500.12000/7747
概要: 論文
8.

論文(リポジトリ)

論文(リポジトリ)
Isomura, Minoru ; Ikegawa, Shiro ; Kinjo, Takao ; Takeuchi, Kumiko ; Yamane-Tanaka, Yuka ; Kitami, Kikuko ; Nakamura, Yusuke
出版情報: DNA Research.  6  pp.387-400,  1999-12-01.  Oxford University Press
URL: http://hdl.handle.net/20.500.12000/46345
概要: Large-scale sequencing of genomic regions and in silico gene trapping together represent a highly efficient and powerful approach for identifying novel genes. We performed megabase-level sequence analyses of two genomic regions on human chromosome 8p (8p11.2 and 8p22.→p21.3), after covering those segments with sequence-ready contigs composed of 74 cosmids, 14 BACs, and three PAC clones. We determined continuous nucleotide sequences of 1,856,753 bases on 8p11.2 and 1,210,381 bases on 8p22→p21.3 by combining the shotgun and primer-walking methods. In silico gene trapping identified four novel genes in the 8p11.2 region and, in the 8p22→p21.3 region, six known genes ( PRLTS, PCM1, MTMR7, HCAT2, HFREP-1 and PHP ) and three novel genes. The distribution of Alu and LINE1 repetitive elements and the densities of predicted exons were different in each region, and Alu -rich portions contained more exonic sequences than LINE1-rich areas.
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9.

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松原, 敏夫 ; Matsubara, Toshio
出版情報: 第27回沖縄市民コンサート リトアニア国立交響楽団 沖縄市市制施行 25周年記念公演.  pp.15-,  1999-11-29.  沖縄フィルハーモニック協会
URL: http://hdl.handle.net/20.500.12000/12787
概要: THE OKINAWA BOARD OF EDUCATION PRESENTS LIETUVOS NACIONALINIS SIMFONINIS ORKESTRAS
1999年11月29日沖縄市民会館大ホールにて開催された、第2
7回沖縄市民コンサート『リトアニア国立交響楽団』のパンフレットの一部。
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10.

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論文(リポジトリ)
辻, 雄二 ; Tsuji, Yuji
出版情報: 琉球大学教育学部紀要.  pp.157-174,  1999-10-31.  琉球大学教育学部
URL: http://hdl.handle.net/20.500.12000/18269
概要: 紀要論文
11.

論文(リポジトリ)

論文(リポジトリ)
神園, 幸郎 ; Kamizono, Sachiro
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.1-16,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5047
概要: The purpose of this study is to investigate the influences of mother's consciousness on the relationship of mother and c hild with autism. By the changes of mother's consciousness, the relationship of mother and child with autism was divided into 3 stages as follows : (Stage 1) Mother inculcates a name of subject to her child. Because the mother-forces her child to follow her indication, her child resists the mother and mother-infant relationship turns stopped out. (Stage 2) By obtaining good results, the mother is full of confidence with regard to her inculcation. (Stage 3) The mother becomes to know the limits of inculcation. Consequently, she accepts her child as a whole. Mother-infant relationship increasingly spreads out.
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12.

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平田, 永哲 ; Hirata, Eitetsu
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.17-40,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5048
概要: The paper emphasizes and discusses on importance, necessity, and proper under-standings on LD students in regular classe s. Most LD students are in regular classes and are taught by wholesale teaching methods, and the appropriate educational services are not carried out for them. Individulaized teaching must be applied to approve their disadilities in academic skills. The paper, also, mentions a case study of a LD suspected child applied individulized teaching in writing Japanese KANJI.
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13.

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中村, 哲雄 ; Nakamura, Tetsuo
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.41-52,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5049
概要: This is an explanatory paper onThe New Social Story Bookwhich is developed first by Carol Gray in U.S.A. The aim of this book is to respond to the questions : Can we teach theory of mind and theory of people? Or how can we teach utistic children ? This book is a teaching manual to help individuals with autism read and understand social situations. The social story is a story written according to specific guidelines to describe a situation in terms of relevent cues and common responses. This material has four basic types of sentences : directive, perspective, descriptive, and control. Implementation of these sentences are very important when to compile the social stories. I explain the book and how to use it in detail .
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14.

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財部, 盛久 ; Takarabe, Morihisa
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.53-68,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5050
概要: 子どもとのコミュニケーションがとりにくいという母親を共同指導者として、話しことばのない広汎性発達障害児に共同行為ルーティンの文脈を用いてコミュニケーション指導を行った。対象児は身振りで訴えるが一方的な伝え方で、意思が伝わらないと飛び出し行動 が見られた。また母親も話しことばで訴えることを求めたり、対象児の意図に気づかないことが多かった。母親を指導に参加させることで子どもと適切に応答できるようになり、対象児も状況に応じた応答が可能になった。同時に、母親が日常生活における親子のやりとりを記録することを通して、対象児の行動の意味の理解と自分自身の応答行動の客観視が可能となり、子どもに対する働きかけ方を自己修正することができた。対象児と母親の変化が相互に影響し合い、母親の対象児に対する認識がポジティブに変化して両者の関係性が変わった。これにより母親と対象児のコミュニケーションが深まり、対象児の飛び出し行動も消失した。
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15.

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平良, 勉 ; 音野, 敬子 ; Taira, Tsutomu ; Otono, Keiko
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.69-76,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5051
概要: The purpose of the present study is to evaluate aerobic power of wheelchair depend marathon runners with paraplegia and to estimate intensity of marathon running. The subjects participated in this study were twelve male and a female with paraplegia (aged 28-42yr). A fixed wheelchair was employed as a testing ergometer for maximal oxygen uptake determination. Expired air was collected and analyzed to calculate concentration of O2 and Co2 using OXYCON4 electronic gas analyzer. Intensity of marathon running was calculated by HR-Vo2 method. The findings are as follows : 1) Maximum oxygen uptake values in this study varied from 20.2ml/kg・min to 40.0ml/kg・min with a mean value of 32.5ml/kg・min±4 .5ml/kg・min. Those Vo2max values exceeded those of inactive wheelchair depend peoples. 2) Mean value of heart rates during marathon running were 168 beats in min. The exercise intensity was 60-90% of heart rate max. which was appropriate value in order to improve aerobic power according to recommendation by Association of American College of Sports Medicine.
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16.

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小田切, 忠人 ; Kotagiri, Tadato
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.77-101,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5052
概要: This study attempts to demonstrate that a child with learning disability (LD) can successfully acquire the algorithms fo r addition and subtraction by means of progressing through a sequence of steps or learning stages which are represented here by the labels 'Real World, ' 'World of Models, ' 'World of Schemas, ' and 'World of Mathematics.' The sequence of the learning stages is the idea of teaching/learning adopted by many Japanese teachers for non-LD children. Specific features of LD are here identified and clarified through observation of the learning difficulties which are exposed within remedial teaching processes. The subject under study here was a fourth-grade pupil who was unable to perform adequately even elementary-level, first-grade calculations. The child's subtype of LD was classified as 'global'. The approach taken to remedial teaching was based on the Suido-Method. The results of this study indicate that a child that exhibits LD can nonetheless succeed in being able to manipulate mathematical ideas and to build the algorithms of addition and subtraction. Moreover, this particular child even managed to discover a new algorithm for subtraction. Five types of difficulties were observed which show potential for the diagnosis of LD : Persistence of Procedural Approach, Problems of Synthesizing, Problems of Attention, Low-Maturity of Meta-Cognition, and Slow Learning. Indications are strong that instruction and learning which incorporates meaningful approaches, such as in the Suido-Method, is more effective than so-called drill-and-practice learning such as is evident in the rote-learning method.
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17.

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横山, 久 ; 井村, 修 ; 中村, 哲雄 ; Yokoyama, Hisasi ; Imura, Osamu ; Nakamura, Tetsuo
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.103-115,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5053
概要: 紀要論文
18.

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論文(リポジトリ)
普久原, 佳子 ; 神園, 幸郎 ; Fukuhara, Yoshiko ; Kamizono, Sachiro
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.117-131,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5054
概要: 本研究ではハンドリガード(手の注視)が出現した事例について、本児が通う学校での指導と関連づけてハンドリガード出現前後の行動を追跡し、重度障害児のハンドリガードの発達的意味について考察した。本児に対して筆者は自他の手の同型性意識を換気させて手 振りの交替やりとり遊びを指導したところ、やりとり遊びが可能になってしばらくして感覚運動遊びの場面でやや不自由な右手側ハンドリガードが出現した。その後短期間で利き手(右手)が定まるとともに、手伸ばしと把握が分化し社会的協約性のある「ちょうだい」の身振り動作が出現した。「ハンドリガードは内受容感覚と外受容感覚の接合であり身体図式に手を取り入れる始動点である。」とする Merlaeau-Ponty の指摘を本事例は支持し、また重度障害児においてもハンドリガードが出現する原理は乳児と同様であり、その後の行動に影響することを示唆している。
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19.

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多和田, 稔 ; 平田, 永哲 ; Tawata, Minoru ; Hirata, Eitetsu
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.133-140,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5055
概要: 学習障害が疑われる児童6名について、読字・書字指導を小学校通級指導教室で行った。言語性LDの場合、言語能力が低いため本児らの得意とする視覚教材を媒介として言語能力を育てていくことに主眼がおかれた。具体的には教科書の写本や挿し絵、フラッシュカ ード、絵カードなどを活用した。読む力については、逐次読みでは身に付かないので、文字を常に言葉や単語として意識させ、大意をつかむように指導した。10ヵ月間の指導の結果、指導開始当初と終了時点のITPAの結果は、言語学習年齢で2ヵ月から1歳8ヵ月の伸びが見られ、6名の平均では10.2ヵ月の進歩が認められた。この子達にとって個別指導の場としての通級による指導の有効性が確認された。
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20.

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棚原, 亨 ; 財部, 盛久 ; Tanahara, Toru ; Takarabe, Morihisa
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.141-151,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5056
概要: 精神的に不安定だと考えられる、障害幼児の母親へのサポートを目的とし、障害受容の態度構造の独自性を明らかにするために、障害受容に関係する感情、認知的評価、行動傾向を事項として想起させ、これらの項目間の類似度を評価させるというPAC分析の技法を 用いた。その結果を障害受容を構成している要素と考えられる障害についての評価的側面、子どもに対する感情的側面、子どもに対する対応の3つの視点から態度構造を検討し、更に障害受容に関する態度構造分析にPAC分析が適応できるか否かを検討した。その結果、PAC分析を障害受容へ適応することによって、障害幼児の母親の個人としての独自性を構造的に明らかにし、PAC分析の障害受容への適応の有効性を確認できた。
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21.

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論文(リポジトリ)
新里, 誠 ; 神園, 幸郎 ; Shinzato, Makoto ; Kamizono, Sachiro
出版情報: 琉球大学教育学部障害児教育実践センター紀要 — The bulletin of the Research and Clinical Center for Handicapped Children.  pp.153-162,  1999-10-28.  琉球大学教育学部附属障害児教育実践センター
URL: http://hdl.handle.net/20.500.12000/5057
概要: 発達が乳児前半段階にある重症心身障害児とのコミュニケーション成立を図るために、二つの遊び場面のビデオ録画とトランスクリプト作成を通して、教師と子どもの関わり方の分析を行った。その結果、次のような知見が得られた。 1.くすぐり遊びでは、Tさん の応答性を引き出す関わりに終始したため、視線の動きの読みとりが不十分であり、やりとり成立は少なかった。 2.立つち遊びでは、Tさんの快表現の上体の揺らしや「手叩き」をTさんの伝達性のサインとして見なし、腰や手に直接触れることで、やりとり成立が多くなった。 3.重症心身障害児とのコミュニケーションでは、子どもの快表出を表現と受け止められる関わり手の感受性や、やりとりの間が重要であることが確認できた。
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22.

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親川, 兼勇 ; 松田, 昇一 ; 屋我, 実 ; 玉城, 厚司 ; Oyakawa, Kenyu ; Matsuda, Shoichi ; Yaga, Minoru ; Tamashiro, Atsushi
出版情報: 日本機械学会論文集. B編 — Transactions of the Japan Society of Mechanical Engineers. B.  65  pp.148-154,  1999-09-25.  日本機械学会
URL: http://hdl.handle.net/20.500.12000/133
概要: The effects of spacing between dual jets on the heat transfer characteristics and flow behaviors over the plate surface were investigated experimentally when the dual slot jets impinge on the target plate. The local heat transfer distributions were measured for various spacings at small nozzle-to-plate separation distances and the flow pattern also visualized by the oil-titanium IV oxide method. An infrared radiometer with a two-dimensional array of InSb sensor was employed to clarify space varying in the flow and heat transfer accompanying by the interferences between jets, and jet and spent flow. The characteristics of heat transfer, flow patterns and thermal distributions change with the spacing of the dual jets and the nozzle-to-plate separation. The phenomenon of axes switching, which is caused by the differences in the self-induced velocity in the non-circular vortices, was observed farther downstream compared with that of a single impingement jet. These phenomena consequently played an important role in the heat transfer enhancement.
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23.

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中園, 邦彦 ; 金城, 寛 ; 顔, 玉玲 ; 山本, 哲彦 ; Nakazono, Kunihiko ; Kinjo, Hiroshi ; Yan, Yuling ; Yamamoto, Tetsuhiko
出版情報: 日本機械学会論文集. C編 — Transactions of the Japan Society of Mechanical Engineers. C.  65  pp.179-186,  1999-07-25.  日本機械学会
URL: http://hdl.handle.net/20.500.12000/63
概要: The present paper proposes a new design method in which a controller acquires the required performance automatically. Tw o important tasks of the control designer are the creation of a simulator of the plant dynamics and the determination of the evaluation of the controller. A three layered neural network of 4-inputs and 1-output controls the plant. The proposed method requires little knowledge of difficult control theories. Genetic algorithm (GA) evolves the neural networks to enable the control of nonlinear systems. The evaluation method originally proposed in this paper is very simple and easy to understand, so that it can be used even by non professionals working in the field of control. In order to demonstrate how to apply the proposed method, the present paper analyzes the load swing suppression of a crane system on a cart. Simulations reveal that the neurocontroller has higher performance than the linear quadratic regulator (LQR) with respect t settling time and robustness. The neuro-controller is able to suppress load swing even in environments that exceed design specifications.
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24.

論文(リポジトリ)

論文(リポジトリ)
Saitou, Masatoshi ; Chinen, T ; Odo, Y
出版情報: Surface & Coatings Technology.  115  pp.282-284,  1999-07-18.  Elsevier Science S.A.
URL: http://hdl.handle.net/20.500.12000/391
概要: Two kinds of growth rate of nickel films prepared by electrodeposition were measured by use of columnar photoresists for med on indium-tin oxide (ITO) glass plates. The ratio of the mean growth rate at the edge to that of the nickel layer was 1.5, which indicates direct evidence for the Schwoebel effect [R.L. Schwoebel, J. Appl. Phys. 40 (1969) 614]; i.e., the presence of anisotropy between the up and down step incorporation probabilities of adatoms. The growth exponent of 0.3 was obtained from atomic force microscopy (AFM) images of the nickel film surface. This suggests that the nickel growth by electrodeposition has a dynamic scaling property.
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25.

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上野, 正実 ; 岡安, 崇史 ; 橋口, 公一 ; 鹿内, 健志 ; 大嶺, 政朗 ; Ueno, Masami ; Okayasu, Takashi ; Hashiguchi, Koichi ; Shikanai, Takeshi ; Oomine, Masaaki
出版情報: 農業機械学会誌 — Journal of the Japanese Society of Agricultural Machinery.  61  pp.75-84,  1999-07-01.  農業食料工学会 — The Japanese Society of Agricultural Machinery and Food Engineers
URL: http://hdl.handle.net/20.500.12000/37087
概要: 車輪が発生するけん引力は定常状態においても一定ではなく,ある幅をもって変動する。これは慣性力を無視できる低速走行時でも見られる一般的な現象であるが,従来の研究では諸力学量の平均値のみが扱われ,このような変動は考慮されてこなかった。しかしなが ら,走行性の解明や作業機の走行制御において重要となる現象であると考え,本研究では,砂地盤上で剛性車輪による走行実験を行い,けん引力などの変動特性について力学的解析を行った。走行車輪に作用する接地反力ベクトルは,接地面上をある幅をもって往復し,その挙動は人間の歩行運動に類似していることを明らかにした。接地反力と車輪表面との交点すなわち着力点から車軸の鉛直中心線までの水平距離は,けん引力の増減に対してそれぞれ逆方向に変化し,両者には負の傾きをもつ直線関係が見られた。これらの現象はトルクのつり合い式で説明できることを示し,けん引力などの変動現象解明の第一歩を提示したと考える。
Drawbar pull of a traveling wheel varies with certain amplitude in a stationary state, even though the traveling speed is so slow that the inertia force is negligible. Averaged values of the mechanical quantities are used as characteristic values of traveling performance, and such small fluctuation is usually neglected. The properties of fluctuation of drawbar pull and so on are mechanically examined by the traveling tests of a rigid wheel on sandy ground so that the fluctuation is important phenomena to clarify the traveling performance and to control machine operations. A soil reaction vector acted on the wheel moves back and forth on the contact surface with some extent of width. It is clarified that such behavior is similar to the walking motion of a man's leg. The horizontal distance from the intersecting point of the vector to the vertical center line of the shaft increases with the decrease of drawbar pull, conversely decreases with the increase of drawbar pull. There is a negative correlation between the horizontal distance and the drawbar pull. It is shown that the phenomena can be represented by the balance equation of torque.
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26.

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兼城, 英夫 ; 下地, 義光 ; 真壁, 朝敏 ; 真喜志, 隆 ; 片桐, 一宗 ; Kaneshiro, Hideo ; Shimoji, Yoshimitu ; Makabe, Chobin ; Makishi, Takashi ; Katagiri, Kazumune
出版情報: 日本機械学会論文集. A編 — Transactions of the Japan Society of Mechanical Engineers. A.  65  pp.116-123,  1999-04-25.  日本機械学会
URL: http://hdl.handle.net/20.500.12000/217
概要: Fatigue properties of the nitrided SS 400 are investigated on the basis of the observation of dislocation structures, su rface topography and fracture surface by means of optical and electron microscopy. Both slip bands and dislocation structures during stress cycling are not formed in the compound layer. The dislocation morphology of the diffusion layer is composed of the untangled and uniformly distributed dislocations and the clusters of the dislocation dipoles at lower stress amplitude, but well defined cell structures at higher stress amplitude. It is also found that the fatigue cracks of the nitrided specimen are initiated without the formation of slip bands and the separation between the compound layer and the diffusion layer occurs during cyclic loading. On the basis of these observations, a mechanism of fatigue fracture for the nitrided SS 400 is proposed.
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27.

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多田, 泰徳 ; 上里, 英輔 ; 玉城, 史朗 ; 山本, 哲彦 ; Tada, Yasunori ; Uezato, Eiho ; Tamaki, Shiro ; Yamamoto, Tetsuhiko
出版情報: 日本機械学会論文集. C編 — Transactions of the Japan Society of Mechanical Engineers. C.  65  pp.201-206,  1999-04-25.  日本機械学会
URL: http://hdl.handle.net/20.500.12000/242
概要: This paper proposes Model Predictive Control with I-compensator of PID control to a traveling crane system. I-element im proves disturbance removal characteristics of Model Predictive Control. To verify the control performance of the proposed method, we compared the proposed method with former one by swing suppression and positioning control experiment of a traveling crane system. As a result, in the step disturbance case, the proposed method can control the system without offset, but former one can't do. And the control performance of the proposed method under the sinusoid disturbance is superior to former one.
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28.

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上野, 正実 ; 大嶺, 政朗 ; 鹿内, 鯉志 ; 橋口, 公一 ; 岡安, 崇史 ; Ueno, Masami ; Oomine, Masaaki ; Shikanai, Takeshi ; Hashiguchi, Koichi ; Okayasu, Takashi
出版情報: 農業機械学会誌 — Journal of the Japanese Society of Agricultural Machinery.  61  pp.101-,  1999-03-01.  農業食料工学会 — The Japanese Society of Agricultural Machinery and Food Engineers
URL: http://hdl.handle.net/20.500.12000/37088
概要: 車輪走行性の解析において重要な接地応力分布の予測には,平板の接地圧と沈下量の関係を記述したM.G.Bekkerの経験式に基づくいくつかのモデルが広く利用されている。これらは簡便で実用上有用ではあるが,すべり率や沈下量による法線応力分布の変化 を表現できないなどいくつかの欠点があり,走行性を高い精度で予測するには改善を要する。本研究では剛性車輪を対象とし,法線応力には放物線分布モデルにすべり率の効果を考慮した修正放物線モデルを,さらに,接線応力にはJanosiモデルにピークを有する接線応カーすべり変位関係式などを導入した拡張モデルを提示した。これらに基づいて沈下量から接地応力分布,けん引力,トルクおよびこれらの経時変化を予測する一連のシステムを開発し,砂地盤におけるモデル剛性車輪の走行実,,.結果と予測結果とを比較し,適用性が高いことを示した。
Some models based on the M.G. Bekker's empirical equation describing the relationship between pressure and sinkage of a footing are widely used for the prediction of distribution of ground contact stress to analyze the traveling performances of a wheel. Although these models are simple and useful in a practical sense, improvements are necessary for precise prediction because of the some faults. For example, the deviation of normal stress distribution with slippage cannot be expressed. In this study, the parabolic distribution model for normal stress was modified by taking into consideration the effect of slippage. Furthermore, the Janosi's model for tangential stress was extended to represent a peak within the tangential stress - slip displacement relation. A prediction system for ground contact stresses, drawbar pull, torque and time series of these quantities of a wheel was developed by using these models. Predicted results were confirmed good applicability by the comparison with experimental results of traveling tests by a model rigid wheel on the sandy ground.
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29.

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親川, 兼勇 ; 瀬名波, 出 ; Oyakawa, Kenyu ; Senaha, Izuru
出版情報: 日本機械学会論文集. B編 — Transactions of the Japan Society of Mechanical Engineers. B.  65  pp.289-295,  1999-01-25.  日本機械学会
URL: http://hdl.handle.net/20.500.12000/238
概要: A quantitative estimate of heat transfer enhancement is discussed here based on the measuements of local coefficients of heat transfer and friction for air flow over a range of Reynolds number from Re=9400 to 28200. Pairs of vortex generators consisting of two rectangular blades, increasing linearly in separation downstream, are aligned laterally to the flow with a spacing W. Characteristics of spanwise local heat transfer and pressure coefficients are found to vary differently over two regions of W. For small W, the phase of their distribution is shifted by 180° from the patterns observed just downstream of the blades. For large W, no phase change is observed but changes of the pattern between paired blades are distinctive. Overall heat transfer coefficients are more than double those for a smooth duct without generators. As a result, the performance ratio is greater than unity for all values of W.
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30.

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論文(リポジトリ)
後藤, 雅彦 ; Goto, Masahiko
出版情報: 人間科学 = Human Science.  pp.61-88,  1999-09.  琉球大学法文学部
URL: http://hdl.handle.net/20.500.12000/33145
概要: 東南中国の地域をめぐる考古学研究として、珠江三角州地域をとりあげ、まず、時間軸の設定を再確認し、周辺地域との関わりを時間的推移の中で見直した。また、近年の新しい研究課題として、地域内における遺跡差及び遺跡間の関係をあげることができる。本稿で も、印紋陶や石錘を例にしながら、東南中国という広い地域単位での位置付け、一地域内での遺跡差の両側面から検討を加えた。そして、商代併行期と言う時代の転換期において、外からの殷系文化の南漸と言う外的要因と共に、内的要因として、特定の素材や製品の広がりにみる地域内部のネットワークが強化されていることに着目し、さらに、中核的な遺跡の存在を考えた。
未公開 : 論文中の第1図~第5図は作者の意向により削除
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31.

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仲間, 博文 ; 新垣, 秀雄 ; 玉城, 史朗 ; 翁長, 健治 ; Nakama, Hirofumi ; Arakaki, Hideo ; Tamaki, Shiro ; Onaga, Kenji
出版情報: 琉球大学工学部紀要.  pp.131-136,  1999-03.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/11947
概要: When analyzing and designing a hybrid power generation system, it is difficult to construct the system's state \nequatio ns. In this study, an effective energy analysis method based on bond graph reasoning approach is proposed to model and analyze the system to solve the above problem. We verify the effect of this approach by simulation using BGSP (Bond Graph Simulation Program), and aim at an optimal design and control for the power generation system.
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32.

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長谷川, 裕 ; Hasegawa, Yutaka
出版情報: 琉球大学教育学部紀要 第一部・第二部.  pp.109-122,  1999-03.  琉球大学教育学部
URL: http://hdl.handle.net/20.500.12000/11827
概要: 紀要論文
33.

論文(リポジトリ)

論文(リポジトリ)
池田, 孝之 ; 清水, 肇 ; 國吉, 真哉 ; Ikeda, Takayuki ; Shimizu, Hajime ; Kuniyoshi, Sanechika
出版情報: 1999-03.  池田孝之
URL: http://hdl.handle.net/20.500.12000/11970
概要: 科研費番号: 08405040
平成8年度~平成10年度科学研究費補助金(基盤研究(A)(2))研究成果報告書
研究概要:本研究は、東南アジア諸国の都市法のシステム化(形成)過程とそれによる都市形成の特徴を明らかにするこ
とを目的し、以下の事項を目途として調査研究を行った。 (1) 近代における東南アジア諸国の都市法制資料これらに対して、インド、インドネシア、シンガポール、マレーシア、タイ、フィリッピン、香港、台湾の8カ国を対象として、国連地域開発センター、東南アジアセンター、海外協力事業団、国立国会図書館等を中心に、都市法制資料を収集し、その抄訳・翻訳および整理を行った。 (2) 東南アジア諸国の都市法の特徴と固有性主たる対象諸国の都市関連法制資料について、その抄訳・整理をすると共に、都市法全般及び特定項目(ゾーニング、サブディビジョン、建築線、開発規制、住宅政策、スラム対策、土地利用計画、土地開発等)について、各国別に整理し、相互の比較分析を行った。 (3) 外国政府統治による都市法の影響と都市形成台湾における日本植民地時期の都市政策及都市形成について分析し、その影響と効果について考察した。又、沖縄における戦後の米国による都市計画・住宅政策についても検証を行った。 (4) 都市形成と計画法都市形成のトレースとして、各都市の開発、人口動態、市街地形成の変化をとらえ、市街地形成の類型化については、市街地形成の特徴をタイプ分類し、そのパタ-ン、背景となる基礎データーとの関連、開発動向と関連等の分析を行った。市街地形成要素の把握として、開発事業、公共投資、産業立地、住宅投資・補助、等の市街地形成に係わる要素を抽出し、形成要因の特質、都市法システムとの関係を検討した。 (5) 以上の成果として、各国別の都市形成と計画法について研究成果報告書としてまとめた。
研究概要:This research aimed at making clear the proses of urban law system and urbanization in South East Asia, and studies follows. (1) Collecting Urban Planning Laws of South East Asia First We collected the data of the urban planning laws of South East Asia (Taiwan, Hongkong, Thailand, Philippine, Malaysia, Singapore, Indonesia, India) at UNCRO,JAICA,NDL,etc.. (2) Characteristic and Originality Urban Planning Laws of South East Asia This research making an abridged translation of the urban planning laws of South East Asia and comparative analyzed the characteristic of planning laws, zoning, subdivision control, development control, housingpolicy, urban land use, etc.. (3) lnfluence of Urban Law and urbanization by Foreign Government In this paper considered that the characteristics of city planning in Taiwan during the Japanese colonial era, and that the influence of U.S.rein government to Okinawa city planning and originality in the postwar. (4) Urbanization and Planning Law The analyze carried out about the urbanization, movement of population, housing development, planning control system, etc.. (5) In the result this report described the urbanization and planning law each country in South East Asia.
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34.

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論文(リポジトリ)
高良, 倉成 ; Takara, Kurashige
出版情報: 琉球大学教育学部紀要.  pp.29-36,  1999-10.  琉球大学教育学部
URL: http://hdl.handle.net/20.500.12000/12607
概要: This paper focuses on two issues of world manufacturing industries. One is the Employment fluctuation, or in the words, demand-supply balance of labour force. Another is the demand-supply balance of their outputs. To analyze the relation of those two balances, I used the \ninternational comparative data, OECD's STAN Database and UNIDO's Industrial Demand-Supply Balance Database. My conclusion, derived from data analysis, is the employment quantity was mainly determined by the domestic demand trends, not by the import growth (for advanced countries employment decline) or the export growth (for developing countries employment expansion).
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35.

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日高, 道雄 ; 土屋, 誠 ; 酒井, 一彦 ; 竹村, 明洋 ; 廣瀬, 裕一 ; 山里, 清 ; RA Kinzie III ; GH de Couet ; M McFall-Ngai ; CL Hunter ; Hidaka, Michio ; Tsuchiya, Makoto ; Sakai, Kazuhiko ; Takemura, Akihiro ; Hirose, Yuichi ; Yamazato, Kiyoshi
出版情報: 1999-03.  日高道雄
URL: http://hdl.handle.net/20.500.12000/13407
概要: 科研費番号: 08044216
平成8~10年度科学研究費補助金(国際学術研究)研究成果報告書
研究概要:ハナヤサイサンゴの接触反応が発生段階により変化することを示した。同じ組み合わせでも、成群体では速やかに非瘉合に至る
のに、幼群体では非瘉合へ至る進行速度が遅かった。非適合を示すペアの境界部では、多数の空胞、凝縮した核が見られ、アポトーシスによる細胞死が起こっていることが示唆された。サンゴの同種異種認識機構について調べるため、異なる種のサンゴの細片を接触させ、隔膜糸による胃腔外消化反応の有無を調べた。異なる科のサンゴに対しても、隔膜糸攻撃を示す場合と示さない場合とが見られ、胃腔外消化反応の有無により種の識別を行う方法は、適用できる種が限られることが分かった。イシサンゴ5種の卵黄タンパク質の生化学的・免疫学的特性を比較した結果、同じ科に属するイシサンゴの卵黄タンパク質は非常によく似ていることが判明した。しかし属が異なると卵黄タンパク質のアミノ酸組成が異なることが示唆された。雌雄同体のイボコモンサンゴにおいて、群体サイズが精子と卵の生産比に及ぼす影響を調査した結果、サンゴ群体のサイズが増加するにつれ、成長率が直線的に減少すること、遺伝的個体間で成長率に有意な差があることが明らかとなった。またサンゴの大きさによる卵と精子の生産比率の差が検出され、サンゴが群体サイズを認識できることが示唆された。ハワイ産のハマサンゴ属2種のサンゴで見られる異常成長部(がん?)の形態、生殖巣、染色体数を調べた。異常成長部では、ポリプの骨格である莢が拡大し、しばしば隔壁が倍数化し、ポリプあたりの生殖巣は減少していた。しかし染色体数に違いは見られなかった。
要約(英文):We showed that contact reaction between young colonies of the coral Pocillopora damicornis changes. Someinitially fused pairs later showedincompatible fusion and then nonfusion. Many vacuoles and condensed nucleiwere observed at the interface of histoincompatible pairs suggesting that celldeath through apoptosis occurred. Corals belonging to different families did not always compete through extracoelenteric digestion. Though presence of coelenteric digestion indicates that the two corals belong to different species, absence of coelenteric digestiondoes not mean the two corals are phylogenetically related. Yolk protein of five scieractinian corals were analyzed biochemically and immunologically. Yolk proteins of congeneric corals were similar to each otherwhile those from corals belonging to different families differ significantly. Abnormal growths (tumors) in Porites lobata and P.compressa showed skeletaimorphology different from normal polyp and reduced reproductive output. However, squashes of coichicine-treated blastulae obtained from crosses using gametes from tumors and mormal polyps revealed similarnumber of chromosomes.
未公開:P.5以降(別刷り論文のため)
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36.

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論文(リポジトリ)
有住, 康則 ; 矢吹, 哲哉 ; Arizumi, Yasunori ; Yabuki, Tetsuya
出版情報: 琉球大学工学部紀要.  pp.5-15,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/14668
概要: The ultimate stability strength of tubular steel stub-columuns under compression and bending are investigated using the non-linear finite element approach developed for determination of the ultimate strength of shell-type-plate. In the analysis, the effects of residual stress and initial geometric imperfection are included. The boundary conditions along the loaded edges are simple support. The analytical results obtained by this method are compared with the analytical values based on other numerical method and the experimental values. A parametric study was conducted to evaluate the effects of length-diameter ratio, slenderness parameter, residual stress, initial geometric imperfection and stress inclination on the ultimate strength of tubular steel stub-columuns.
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37.

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論文(リポジトリ)
尾西, 英樹 ; 大桃, 一晃 ; 上里, 英輔 ; 山本, 哲彦 ; Onishi, Hideki ; Omomo, Kazuaki ; Uezato, Eiho ; Yamamoto, Tetsuhiko
出版情報: 琉球大学工学部紀要.  pp.1-4,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/13747
概要: This paper considers a robust stabilization via decentralized control of the system which is constructed in two seesaws combined with a thin plate. Applying decentralized control method, a robust stabilizability condition is obtained in terms of bilinear matrix inequality (BMI). A state feedback is computed using the solution of the BMI. We also show experimental results.
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38.

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論文(リポジトリ)
比嘉, 広和 ; 瑞慶覧, 長定 ; 島袋, 勝彦 ; Higa, Hirokazu ; Zukeran, Chotei ; Shimabukuro, Katsuhiko
出版情報: 琉球大学工学部紀要.  pp.59-63,  1999-03.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/14148
概要: Recently one of the most important problems is the pin limitations in the integrated circuits. Multiplevalued logic has attracted for solution of the problem. because for the same amount of information transfer, the total number of pins required in the multiple-valued integrated circuit chip is much less than that of an binary integrated. In this paper, we discuss synthesizing quaternary VT-gate networks. (VT-gate has variable threshold) An implicant in the function plays important role when synthesizing VT-gate networks. Because we can reduce the number of VT-gates in the networks by utilizing implicant. We apply a candidate for implicant in eval function and show good result was obtained.
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39.

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論文(リポジトリ)
玉城, 勲 ; Tamaki, Isao
出版情報: 琉大法学.  pp.1-2,  1999-09.  琉球大学法文学部
URL: http://hdl.handle.net/20.500.12000/14187
概要: 紀要論文
40.

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勢理客, 勝則 ; 山下, 秀和 ; 比嘉, 晃 ; 渡久地, 實 ; Serikyaku, Katsunori ; Yamashita, Hidekazu ; Higa, Akira ; Toguchi, Minoru
出版情報: 琉球大学工学部紀要.  pp.99-103,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/14427
概要: This paper is desaibed about structural changes of hydrogenated amorphous carbon films (a-C:H) exposed by inductively co upled hydrogen plasma The a-C:H films were prepared by magnetron sputtering using VHF plasma. Structure and optical gap of the plasma exposed films were investigated by infrared (IR) absorption and UV/Visual (VIS) absorption. From IR measurements, it is found that hydrogen concentration in the films decreased with increasing exposed time. The number of sp^3-CH_3 and sp^2-CH bonds in the films decreased as compared with sp^3-CH, sp^3-CH_2 in the films by hydrogen plasma treatment. The optical gap decreased with the bonding hydrogen concentration.
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41.

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玉城, 清政 ; 玉城, 斉 ; 山田, 孝治 ; 遠藤, 聡志 ; Tamashiro, Kiyomasa ; Tamaki, Tadashi ; Yamada, Koji ; Endo, Satoshi
出版情報: 琉球大学工学部紀要.  pp.143-149,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/14710
概要: One of the important issues in intelligent systems and robotics is to develop an efficient method to control multi-agent system. In order to work multi-agent system well as problem solver, it's so significant to create cooperative behaviors among the agents. In the multi-agent system, the behaviors of cooperation emerged as the results of suitable role learning by each agent. In this paper, we evaluate reinforcement learning, genetic algorithm and competitive co-evolution algorithm from the viewpoint of adaptability to different environment as the learning method of multi-agent system, and discuss the property of each technique.
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42.

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當間, 愛晃 ; 前堂, 卓也 ; 遠藤, 聡志 ; 山田, 孝治 ; Toma, Naruaki ; Maedo, Takuya ; Endo, Satoshi ; Yamada, Koji
出版情報: 琉球大学工学部紀要.  pp.129-134,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/14727
概要: The immune system is one of the adaptive biological systems whose functions are to identify and to eliminate foreign mat erials. The immune system is mainly composed of MHC to identify non-self and Immune Network. The Immune Network is a mechanism, the immune response is carried out by selfregulation, and is composed of immune cells and their interaction. In this paper, we propose a system that controls the behaviors of an autonomous mobile robot by teacher robots composed of the Immune Algorithm based on Self-Preservation. The teacher robots have sensor using MHC and learning method for adaptive behaviors using Immune Network whose principle of operations are based on the interaction. To investigate the validity of our system, we simulate on Khepera Simulator and examine its result.
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43.

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亀島, 力 ; 与那覇, 賢 ; 遠藤, 聡志 ; 山田, 孝治 ; Kameshima, Chikara ; Yonaha, Satoru ; Endo, Satoshi ; Yamada, Koji
出版情報: 琉球大学工学部紀要.  pp.121-127,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/14729
概要: Focal Point is a method of sharing information without explicit communication between cooperative multi-agents. It is ha rd for an artificial agent to prescribe the fixed algorithm which decides a focal point without relation 1D the environment. In this paper, we suppose the focal points as a distribution of a situation to induce the behavior of the agent. The autonomous agent can get focal points as a learning of the inside model of itself by the feedback from the environment. Consequently, the mutual agreement of multi-agent is emerged from an unity of the probabilistic choice of fields. Each agent is reinforced the filed potential value respectively by successful task. Finally, focal points can be acquired as potential distribution map of reinforcement value.
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44.

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Kinjo, Akio ; Sakugawa, Choken ; Nakamura Nunez, Irma ; Uchihara, Toshio ; 宇地原, 敏夫
出版情報: 琉球大学理学部紀要 — Bulletin of the College of Science. University of the Ryukyus.  pp.23-30,  1999-11.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/15051
概要: N-methylphenothiazine reacts with Fe(3) ion and reaches equilibrium in the anionic SDS micellar solution as reported by Minero et al. However, the reaction did not take place in the cationic DTAB, non-ionic Brij 35 micellar and waterethanol (1:1) solutions. In order to obtain more information about the effect of surface negative charge of micelle on the reaction, thermodynamic study of the reaction was carried out in SDS-hexanol mixed micellar solutions. The equilibrium constant decreases with increasing the concentration of hexanol in the mixed micellar solutions. Both free energy and enthalpy changes of the reaction shift in the positive direction with increasing the concentration of hexanol, reflecting the fact that the reaction becomes more difficult with increasing the concentration of hexanol. The entropy change seems independent of the concentration of hexnol.
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45.

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Yoshino, Tetsuo ; Kon, Takeshi ; Miura, Asami ; 吉野, 哲夫
出版情報: 琉球大学理学部紀要 — Bulletin of the College of Science. University of the Ryukyus.  pp.77-86,  1999-03.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/15267
概要: Since Beryx mollis Abe, 1959 was described from Sagami Bay, Honshu Island, Japan, it has been regarded as a junior synon ym of B. splendens Lowe. Comparison of specimens of Beryx from Japan revealed that B. mollis is a valid species and distinguished from B. splendens in having the following characters: fewer dorsal fin rays (12-13 vs. 13-15); fewer pyloric caeca (15-20 vs. 27-36); deeper body (39.0-43.2 vs. 33.9-41.0 as % of SL); larger eyes (13.8-15.9 vs. 10.6-14.1 as % of SL); and longer pelvic fins (24.1-33.2 vs. 19.8-27.8 as % of SL); oval-shaped posterior nostril (vs. slit-like); stronger ctenoid scales. Known distribution of B. mollis is restricted to southern Japan from Sagami Bay to the Ryukyu Islands.
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46.

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Motoyama, Isao ; Nakamura, Mamoru ; Katao, Hiroshi ; Takaki, Yasuaki ; Nishida, Hideaki ; Kuno, Toshiyuki ; Morii, Yasuhiro ; Higa, Takeshi ; Nagai, Naoko ; Takei, Naoyuki ; Tanaka, Hitoshi ; 中村, 衛
出版情報: 琉球大学理学部紀要 — Bulletin of the College of Science. University of the Ryukyus.  pp.43-51,  1999-03.  琉球大学理学部
URL: http://hdl.handle.net/20.500.12000/15387
概要: Investigation of subbottom seismicity, grab sampling of surface sediments, and net sampling of planktonic organisms were carried out in the southern Okinawa Trough and off Miyako Island in November 1998. Four pop-up type ocean bottom seismographs (OBS) were settled on the seafloor of the southern Okinawa Trough to investigate subbottom seismicity of this area. All OBS' s were successfully retrieved after 4 days observation and numerous number of micro-earthquakes were recorded by them. Surface sediments collected from the island shelf and the adjacent slopes off the west coast of Miyako Island are composed mainly of bioclastic carbonate sand. Foraminifers occur dominantly in some samples and alive benthic organisms such as larger foraminifers, sponges, corals and molluscs were obtained from some samples. Neogene mudstone gravels were taken from the station on the fore-arc slope south of the island. Ten phyllosoma larvae of Palinurid lobster and Scyllarid lobster are collected by the large larval net (mouth diameter: 2.0 m) from the surface layer north of Iriomote Island. Each phyllosoma larva was kept in the 1 liter bottle, and they were transported to the laboratory to study the larval development.
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47.

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陳, 延偉 ; 我如古, 慎 ; 国吉, 剛司 ; 仲尾, 善勝 ; 上間, 淳也 ; Chen, Yen-Wei ; Ganeko, Shin ; Kuniyoshi, Takeshi ; Nakao, Zensho ; Uema, Jyunya
出版情報: 琉球大学工学部紀要.  pp.85-93,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/15629
概要: We have developed a geographic information system (GIS) for University of the Ryukyus. The system is composed of map dat a and other related information. It is expected to be used as an integrated information system of the university.
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48.

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名嘉, 靖 ; 曽, 湘燕 ; 陳, 延偉 ; 仲尾, 善勝 ; Naka, Yasushi ; Zeng, Yanien ; Chen, Yen-Wei ; Nakao, Zensho
出版情報: 琉球大学工学部紀要.  pp.79-83,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/15647
概要: An evolutionary neural network is proposed for classification of remotely sensed images. In the proposed neural network, the neuron number of the hidden layer is optimized by use of the genetic algorithm. The simulation results show that the proposed neural network is efficient for classification of remotely sensed images.
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49.

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仲座, 栄三 ; 津嘉山, 正光 ; 牧野, 敏明 ; 小島, 健太郎 ; 川満, 康智 ; Nakaza, Eizo ; Tsukayama, Seiko ; Makino, Toshiaki ; Kojima, Kentaro ; Kawamitsu, Yasutomo
出版情報: 琉球大学工学部紀要.  pp.41-45,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/15808
概要: Land Hermit Crabs(LHC) usually live among vegetation on land adjacent to coasts. At spawning time they make their way to the sea where they release their spawn. Due to ever increasing construction of artificial barriers between land and sea, LHC's and other species that share their ecosystem are facing a survival crisis. Okinawa, the location of this research, is situated in southern Japan. Developing countries whose natural coastlines currently support the LHC will face the same problem in the future as Okinawa does now. Firstly, this research explored the effects of the construction of artificial barriers on the ecosystem of the LHC, via field survey. And then, to estimate the ability of the LHC to climb artificial barriers, quantitatively, experiments on the pulling and hauling force of LHC were carried out.
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50.

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仲座, 栄三 ; 津嘉山, 正光 ; 牧野, 敏明 ; 北村, 康司 ; 川満, 章秀 ; 坂本, 哲史 ; Nakaza, Eizo ; Tsukayama, Seikoh ; Makino, Tosiaki ; Kitamura, Yasushi ; Kawamitu, Akihide ; Sakamoto, Tetushi
出版情報: 琉球大学工学部紀要.  pp.35-40,  1999-09.  琉球大学工学部
URL: http://hdl.handle.net/20.500.12000/15827
概要: Sea walls are usually designed only for protection against storm waves, with no account being taken of the effect of lon g waves, e.g. Tsunamis or Bore-like surf beats. The estimation of the effectiveness of sea walls as protection against long waves is very important in the field of coastal countermeasures, particularly on coral reef coasts, where long waves can cause abnormally high rises in water levels. The establishment of estimation methods for wave forces, i.e. summing up the effect of long and short wave forces, has a special significance for coastal engineers working on reef coasts. There is as yet no formula for the estimation of either the force or reflection of strong non-linear long waves. In this study, we offer empirical calculation formulae for wave forces and wave reflections. The wave force formula has been derived from hydrostatic wave pressure, whilst the wave reflection coefficient was derived from the energy flux conservation rule.
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