1,721,073 research outputs found
NMR学部実験・演習テキスト
Get PDF3年生の実験のテキストとして使用 ; 大学院初年度程度NMR (Nuclear Magnetic Resonance：核磁気共鳴) は化学・物理・生物学・医学等の広い分野で使われている。またフーリェ変換NMR 法の原理は、他の分光法で時間領域の実験に応用されるようになった。この課題ではフーリェ変換NMR 法の原理を学ぶとともに、緩和時間と分子運動の関係、試料の磁化率の効果、化学交換のスペクトルに及ぼす影響等について調べる。課題の(1-5)を行う こと。4 節と課題(6,7)で説明する２次元NMR は授業では行わない。後で自習する時に参考にして欲しい。本テキストは数式が多い。だがいずれも高校数学レベルの行列や微分方程式ばかりである。自分の手を動かし実験をしながら、計算問題を解き、自分のデーターと比較してみると式の意味がはっきりしてくるであろう
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
<Book Symposium>Tadahiro OOTA. Auch eine Geschichte der deutschen Philosophie im 19. Jahrhundert, (Kyoto University Press, 2022) The Friesian School and the Neo-Friesian School
No full textVariations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A numerical study on traffic flow by Nagel-Schreckenberg model and optimal velocity model
Get PDF本文データは学協会の許諾に基づきCiNiiから複製したものである交通流の微視的モデルにはセルオートマトンモデル(CA)と追従モデルが挙げられる.Nagel-Schreckenberg(NS)モデルはCAモデルの一つで現実の解析にも適用可能であるとされ, 基本モデルの1つとして使用されている.一方, 最適速度モデルは追従モデルの一つで様々な交通流の現象を説明できるモデルである.近年, CAモデルと最適速度モデルの関係が徐々に明らかにされつつあるが, NSモデルと最適速度モデルの関係性は明らかにされていない.本報告では, NSモデルと最適速度モデルを用いて数値実験を行うことにより, 両者の類似性及び差異について検討を行う.Cellular automaton(CA) models and following models are traffic microscopic models. Nagel-Schreckenberg(NS) model is a CA model, adopted as one of the basic models applicable to analysis of real traffic flow. On the other hand, optimal velocity model, recognized as one of following models, can represent various traffic flow characteristics. The relationship between the NS model and the optimal velocity model is not clear, though the relationship between the optimal velocity model and other CA models has been confirmed recently. In this report, we numerically discuss the similarities and the differences between both models of the NS model and the optimal velocity model
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