著者
大垣 正勝 竹村 英夫
出版者
一般社団法人日本音響学会
雑誌
日本音響学会誌 (ISSN:03694232)
巻号頁・発行日
vol.46, no.9, pp.723-727, 1990-09-01

乾き雪の積雪中の音速及び積雪表面の垂直入射吸音率を測定し、文献による従来のデータと比較検討した。まず、密度の小さい新雪から、密度の大きいしまり雪までの積雪試料について音速を測定し、音速と密度との関連を考察した。密度の大きい試料は、自然の状態では得られなかったので、積雪をふるいに通してから圧縮したものを用いた。今回測定した乾き雪の積雪試料においては、積雪中の音速は空気中の音速より遅く、巨視的に見て密度の増加と共に減少する傾向が得られた。次に、積雪表面の垂直入射吸音率の周波数特性を密度をパラメータとして音響管を用いて測定した。その結果、音速、垂直入射吸音率ともに、文献による従来のデータとばらつきの範囲内でほぼ一致した。本測定により、乾き雪の積雪における密度と音速及び垂直入射吸音率との関連を実験的に把握することができた。
著者
今田 治宏 江口 千奈美 中川 武 後藤 春彦
出版者
日本建築学会
雑誌
日本建築学会計画系論文集 (ISSN:13404210)
巻号頁・発行日
vol.71, no.602, pp.97-103, 2006
参考文献数
17
被引用文献数
3 3

This study shows the life style and the spatial usage in the rural villages at the Angkor area from a field survey. It aims to present the vision for the village's future, by considering the influence that occurs to the villagers from tourism and the labors such as the conservation projects at the Angkor monumental area as a basis. Angkor Krau village, which is nearby the Angkor monuments has been chosen as a case study district. As a result, the following matters were clarified. Firstly, the actual life style and the economic condition. Secondly, the housing styles and its characteristics. Thirdly, the actual usage of the space in and around the housings. From this study, it can be said that, it is important to maintain the traditional usage method of the housings by creating an annex as an example, and the community development should be considered by viewing on the relationship among the Angkor monuments.
著者
能登路 淳 齊藤 皓彦 早川 元造
出版者
一般社団法人 電気学会
雑誌
電気学会論文誌A(基礎・材料・共通部門誌) (ISSN:03854205)
巻号頁・発行日
vol.123, no.9, pp.827-832, 2003 (Released:2003-12-01)
参考文献数
9

The effects of tensile stress and strain on magnetization and magnetic domains in silicon steel sheets were investigated. The magnetization of elastic deformation regions decreased with increase of strain and the strain-magnetization properties of plastic deformation regions under stress showed peculiar characteristics. The magnetization increased with decreasing strain. We observed Lancet and other domains in a sample, especially around the boundary of crystal, after removing stress applied to a plastic deformation region. This phenomenon can be explained by changes in the domain structures, which were partly observed. This results obtained in this investigation can be applied to the nondestructive detection of fatigue in metallic magnetic materials.
著者
Mohri Akihiro Yuyama Tetsumori Tanaka Hitoshi HIGAKI Hiroyuki YAMAZAWA Yohei MICHISHITA Toshinori
出版者
社団法人応用物理学会
雑誌
Japanese journal of applied physics. Pt. 1, Regular papers & short notes (ISSN:00214922)
巻号頁・発行日
vol.39, no.12, pp.6726-6731, 2000-12-15
被引用文献数
1

Particles of a low current beam can be accumulated in a harmonic potential well in a high vacuum environment when they are repelled back by a local rf electric field of the frequency close to the bounce motion in the well. Here, proper damping mechanisms for the repelled particle blobs are neccessary to suppress their bounce motions. This stacking method was experimentally proved for electron beams of 1.1μA using a Multi-Ring-Electrode trap and the results were compared with numerical estimations based on a single particle model. The observed damping was much larger than the estimated one from the resistive wall effect. The stacking efficiency was nearly the same as the estimated one at the stacked number N less than 1×10^7 but it decreased with N. Experimentally obtained relationship amongst the stacked number, the incident beam energy, the rf frequency and its amplitude behaved qualitatively in the same way as the numerical results. The accumulation proceeded until the well was filled up with electrons.
著者
清水 研明
出版者
川崎医療福祉大学
雑誌
川崎医療福祉学会誌 (ISSN:09174605)
巻号頁・発行日
vol.2, no.1, pp.25-31, 1992

言語の「経済性」, すなわち, 有限数の音素から数十万の形態素を, さらにその形態素からほぼ無限数の文をつくりだすことが可能なのは, 自然言語が「二重」に「分節」されているからである.チンパンジーを中心にした類人猿に手話や人工言語を習得させるプロジェクトにおいて, この「二重分節」に言及されることが多い.「二重」に「分節」された手話や人工言語を使って語や文を産出しているのだから, 類人猿達の「言語」にも経済性がみられる, といった評価が一般的である.しかし, 類人猿達の産出する語や文はタイプの数が限られており, 人間のそれとは比較すべくもない.本論では, 「二重分節」という構造を持つシステムの習得が, 「経済性」の発現を必ずしも保障しないことを論じる.
著者
福島 邦道
出版者
国語学会
雑誌
国語学 (ISSN:04913337)
巻号頁・発行日
no.139, pp.p108-110, 1984-12
著者
児玉 桂子
出版者
一般社団法人日本建築学会
雑誌
日本建築学会計画系論文報告集 (ISSN:09108017)
巻号頁・発行日
no.385, pp.53-63, 1988-03-30
被引用文献数
2

Based on the postulation that it is very importnat that proper architectural conditions for the construction of homes for the aged enhance the residnets' adaptability to their living environment, the purpose of this article is to: 1) examine a) what effect the present architectural conditions of the homes for the aged have on the amount and kind of architectural complaints. B) whether the differences in policy and program of the facilities develop different kind of effect on the amount and kind of architectural complaints. C) whether the differences in physical functions and the sex of the residents develop different kind of effect on the amount and kind of architectural complaints. 2) fine out how we can decrease the number of complaints pertaining to architectural conditions of the homes for the aged raised by the residents. I have selected 8 facilities (6 Homes for the Aged, 1 Type A & B Home with Moderate Fee) out of the nearly entire 44 such facilities in Tokyo.. Selection has been made to cover the full range of score on the Rating Scale for the Environmental Features of Residential Faciliies for the Aged (Kodama, 1986). I have evaluated the above facilities on the Architectural Features Checklist. And then deduced the architectural scores on each of the following eight categories on the Architectural Features Checklist '. 1) physical amenity, 2) socio-recreational aids, 3) prosthetic aids, 4) informational aids within the building, 5) safety features, 6) architectural individuality, 7) space and equipment, 8) community accessibility. And the architectural scores for each category was given according to the ranks of the five architectural conditions: 1) 0.0-39.9, 2) 40.0-59.9, 3) 60.0-79.9, 4) 80.0-99.9, 5) 100.0. The higher scores indicate better conditions. I selected 377 subjects for our questionnaire. I chose only those, who were both intellectually capable of fully understanding the questions and were physically able to lead a normal life on their own. I graded and recorded their cemplaints on the Architectural Complaints Checklist, which is divided into the same 8 categories as the Architectural Features Checklist. The higher scores indicate greater number of complaints. 26.1 % men and 73. 9 % women were interviewed, their average being 76. 3 years old (S. D. 5. 9). The survey was conducted from August to September, 1984. Conclusion 1) How architectural conditions affect the number of architectural complains raised. The scores on the Architectural Complaints Checklist pertaining to the following six categories '. A) physical ameity, b) socio-recreational aids, c) informational aids within the building, d) architectural individuality, e) space and equipment, f) community accessibility, differed significantly from each other, depending on the architectural conditions. Measures to improve the points on the architectural score of these six categories decreased the points on the Architectural Complaints Checklist. The scores on the Architectural Complaints Checklist pertaining to: a) physical amenity, b) informational aids within the building, c) architectural individuality, d) space and equipment, indicated that there were also significant differences among the scores obtained which applied to other architectural categories. This means that it is necessary to adopt measures that raise, practically the whole set of scores, pertaining, to the architectural categories of the building interior, in order to decrease the points on the Architectural Complaints Checklist. 2) How people of different sex and with different physical functional capabilities affect the scores on the Architectural Complaints Checklist. Under similar architectural conditions, the group of people, with poorer health and with lesser physical capabilities to lead a daily life, registered high points on the Architectural Complaints Checklist, in these categories: A) physical amenity, b) prosthetic aids, c) safety features, d) architectural individuality, e) space and equipment. On the other hand, the group of people, who were highly active in their daily lives scored highly in these categories: A) socio-recreational aids, b) architectural individuality, c) community accessibility. Thus, flexible and adaptable architectural environment is required to decrease the points on the Architectural Complaints Checklist in order to cope with people having different health problems and with varying capabilities of daily activity. In the male and female analysis of the scores on the Architectural Complaints Checklist, under similar architectural conditions, the female got higher points than the male in these categories: a) prosthetic aids, b) safety features, c) architectural individuality, d) space and equipment. As two third of the residents in homes for the aged are female, we must continue further study on how we can create better architectural conditions to make their lives more comfortable. 3) How policy and program of the facilities influence the scores on the Architectural Complaints Checklist. When comparing the best architectural conditions and the best policy and program conditions with those of the worst, the study has revealed that, the points on the Architectural Complaints Checklist were notably higher, in the case of the latter, for certain specific categories. In places like the home for the aged, where there are mixed group of people living together, the facts of this analysis strongly manifests both the need and the importance of flexible and skilled management, that can fully utilize the architectural functions of the building, to its best advantage. 4) The characteristics and the relationship of architectural complaints to other problems of environmental adaptability. I would like to explain how architectural complaints affect the degradation of morale, and the induction of environmental psychological distresses such as; loneliness, deactivation, nervousness, aggression, and depression, which are the residents' maladaptation to their living environment.
著者
土屋 俊
出版者
社団法人情報科学技術協会
雑誌
情報の科学と技術 (ISSN:09133801)
巻号頁・発行日
vol.52, no.2, pp.68-72, 2002-02-01

1990年代末における電子ジャーナルの急激な普及は, 21世紀の学術コミュニケーションの世界の変貌を予兆する画期的な出来事であったが, 日本の関係諸方面における対応はその動きに遅れた。この状況を, 19世紀以来の近代的学術コミュニケーションの展開および20世紀後半の情報通信技術の発達とのふたつの流れのなかで位置づけたのちに, 2000年から2001年における日本における対応状況を紹介して, 今後の展望・課題を述べる。
著者
平野 智 早原 悦朗
出版者
一般社団法人電子情報通信学会
雑誌
電子情報通信学会論文誌. A, 基礎・境界 (ISSN:09135707)
巻号頁・発行日
vol.78, no.5, pp.562-572, 1995-05-25
被引用文献数
1

演算増幅器1個とLCR素子を組み合わせた単一演算増幅器形回路の構成法について検討した.提案したLCR素子を用いた単一演算増幅器形回路は,定抵抗入力インピーダンス,零出力インピーダンス回路であり,すべての安定な伝達関数が実現可能な回路構成法である.本論文では特に全域通過特性の実現方法に注目してその設計法を示し,実際に5次の全域通過特性を実現する回路について計算機シミュレーションおよび個別部品を用いた試作回路によって実験を行い,Deliyannis形回路の縦続構成による回路と比較を行った.LCR素子に対する素子感度特性および演算増幅器の周波数特性,インダクタLのQに対する感度特性を求め,提案した全域通過回路は低素子感度であり,しかも必要なリアクタンス素子は伝達関数の次数と同じ数でよいという利点があることを示した.
著者
菅原 良孝
出版者
一般社団法人 電気学会
雑誌
電気学会誌 (ISSN:13405551)
巻号頁・発行日
vol.125, no.1, pp.25-28, 2005 (Released:2007-02-02)
参考文献数
18
被引用文献数
5 5

本記事に「抄録」はありません。
著者
神尾 享秀 三瓶 政一 笹岡 秀一
出版者
一般社団法人電子情報通信学会
雑誌
電子情報通信学会論文誌. B-II, 通信II-無線通信・無線応用 (ISSN:09151885)
巻号頁・発行日
vol.77, no.1, pp.11-18, 1994-01-25
被引用文献数
7

陸上移動通信において,高速伝送を行う場合には,マルチパスフェージングによる周波数選択性フェージングのため,伝送特性が著しく劣化する.このような場合の対策として判定帰還型等化器(DFE; Decision Feedback Equalizer)が研究されている.既に,QPSK / TDMAシステムにおいて,プリアンブルおよびポストアンブルのタップ係数を内挿する簡略化DFEを提案している.本論文では,周波数利用率の大きい16QAM / TDMAシステムへの適用について検討を行った.この場合,信号間距離の減少,判定誤りによる誤り伝搬により誤り率特性が劣化する.このため,逆方向等化での遅延波のタイミング検出機能を付加した両方向等化および逆数補間を用いて,タップ数を減少し,遅延波の存在しない場合および,遅延波の影響による軽減困難誤り特性を向上させたシステムを提案する.提案方式について,計算機シミュレーションにより検討を行った.また,演算量の従来方式との比較も行った.その結果,提案方式は,従来方式の1 / 10の演算量で,良好な等化特性を得られることがわかった.
著者
村田 純教 Murata Yoshinori
巻号頁・発行日
1982-03-25 (Released:2006-06-15)

名古屋大学博士学位論文 学位の種類:工学博士 (課程) 学位授与年月日:昭和57年3月25日
著者
古永 真一
出版者
Waseda University
巻号頁・発行日
2002

制度:新 ; 文部省報告番号:甲1676号 ; 学位の種類:博士(文学) ; 授与年月日:2002/9/26 ; 早大学位記番号:新3427