1,720,979 research outputs found
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
Study on transport behavior of radiocesium from river watershed to coastal marine environment and its ecological effects
Get PDF2011年3月11日に発生した福島原発事故により環境中に放出された放射性核種の陸域と沿岸域での影響評価を行うために、主に福島県浜通りを調査地域に設定し、沈着した放射性セシウムの河川流域から沿岸域への二次的な移行動態を調べた。2011年5月から2014年12月までの観測結果では、河川水中の放射性セシウムの放射能濃度は、降雨時に一時的に増加するが、平水時には時間の経過とともに指数関数的に減少した。また、2011年度には、粒子態に含まれる放射性セシウムの存在割合が、それ以降の観測試料に比べて20～30ポイント低く、放射性セシウムの河川への流出挙動が事故初期時とそれ以降では異なることが明らかとなった。The secondary dispersion of radiocesium is important to understand the migration behavior of radiocesium (134Cs and 137Cs), released from the Fukushima Dai-ichi Nuclear Power Plant (NPP) accident, in river systems running through the areas with widely various radiocesium deposition. This study investigated radiocesium radioactivity in river waters in Abukuma, Same, Natsui, Niida, and Uta Rivers, Japan. The secondary dispersion exhibited that total radioactivity of radiocesium decreased concomitantly with increasing time after the NPP accident at normal flow condition. Higher radioactivity and particulate phase percentage were found at high flow condition caused by rain events. The percentage of particulate phase for May-September 2011 was 20-30 points lower than those after December 2011 at normal flow condition. These results indicate that the supply of radiocesium from the watershed differs from the early stage up to September-December 2011 and from the last stage.研究課題/領域番号:24310009, 研究期間(年度):2012-04-01 - 2015-03-31出典：「陸域から沿岸域への放射性セシウムの移行動態解析と生態系への影響評価」研究成果報告書 課題番号24310009
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-24310009/24310009seika/)を加工して作成金沢大学環日本海域環境研究センターresearch repor
Research of characteristics of riverine suspended particles released by heavy rain and their effects on coastal ecosystem
Get PDF石狩川河川水の懸濁態有機物の放射性炭素のδΔ14C値は年間を通じて大きな変動を示し、雪融けと降雨時には古い有機物が移動していることが明らかとなった。その変動幅は下流域<中流域<河口域<上流域の順であり、河川に供給される懸濁態の有機物は、河川流域環境や水の供給経路等の特徴と関連して変動することが考えられる。これらの結果から、沿岸域への影響評価には、雪融けと降雨時の粒子の供給量と供給機構の重要性が示唆された。研究課題/領域番号:18310002, 研究期間(年度):2006-2008出典：「集中豪雨により放出される懸濁粒子の特徴と沿岸生態系への影響評価」研究成果報告書 課題番号18310002
（KAKEN：科学研究費助成事業データベース（国立情報学研究所））
（https://kaken.nii.ac.jp/report/KAKENHI-PROJECT-18310002/18310002seika/)を加工して作成research repor
Variations 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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