1,720,970 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
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
A multifaceted study of brain network in schizophrenia: morphological, physiological and functional approach
Get PDF先行研究として,fMRI が病状の進行や治療効果の指標となりうるかを検討するために, 健常者におけるストゥループ課題による脳賦活の再現性について検討した.結果,ストゥループ課題による前部帯状回と背外側前頭前野の賦活とその再現性の高さが確認された.また脳波研究では,健常者および統合失調症患者を対象に,アンフェタミン投与による脳皮質機能変化を,脳波の複雑性解析を用いて検討した.結果,アンフェタミンは健常の脳皮質機能を低下させる傾向がある一方,統合失調症においては脳皮質機能において効果的に作用する傾向が見られた.Reliability of fMRI activations with the Stroop task was preliminary investigated in order to assess a potential ability of fMRI is to monitoring the pathogenic progress or therapeutic interventions. The Stroop task can elicit brain activations in anterior cingulate and dorsolateral prefrontal that have a relatively high degree of reproducibility. As for EEG study, changes of cortical function with amphetamine were investigated in schizophrenia and healthy controls using EEG complexity analysis. As a result, amphetamine tends to reduce cortical function in healthy control which was not seen in schizophrenia.研究課題/領域番号:22791116, 研究期間(年度):2010 – 2012出典：研究課題「統合失調症の脳内ネットワークに関する多面的研究:形態・生理・機能的アプローチ」課題番号22791116
（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-22791116/22791116seika/）を加工して作成research repor
A study of neural network alterations in autism using nonlinear neuroimaging approach
Get PDF神経ネットワーク障害仮説は自閉症スペクトラム障害（ASD）の病態生理を理解する上で重要な鍵を握る．本研究ではASD患者を対象に脳波および脳磁図の非線形理論やグラフ理論を用いて神経ネットワーク異常の抽出を試みた．
結果，脳波の非線形解析は，ASDにおける治療的介入効果を捉える可能性が示唆された（岡崎ら 2015）．また ASDでは幼児期に過剰な発達（脳磁図の複雑性の上昇）（高橋 ら 2016）と高い神経ネットワークの効率性（グラフ理論に基づくスモールワールド性の上昇）を有する（高橋ら 投稿中）ことを明らかにした．Aberrant neural network lies at the heart of autism spectrum disorders (ASD). Nonlinear theory and graph theory approaches to EEG and MEG data have provided a useful framework to study functional neural networks architecture. Regarding these two theories, we aimed to characterize the neural network alterations in ASD.
Results suggested that evaluation of EEG complexity offers a useful therapeutic assessment of ASD (Okazaki et al., 2015). Additionally, enhanced brain development (MEG signal variability) (Takahashi et al., 2016) and hyper-efficiency (higher small-worldness) (Takahashi et al., Submitted) were observed in children with ASD.研究課題/領域番号:25461755, 研究期間(年度):2013-04-01 – 2016-03-31出典：研究課題「自閉性障害の神経ネットワーク異常に関する研究: 非線形解析による脳形態生理学的検討」課題番号25461755
（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-25461755/25461755seika/）を加工して作成research repor
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
神経ネットワーク障害仮説に着目した自閉性障害におけるオキシトシン作用機序の解明
Get PDFGABA神経伝達の障害は，自閉症スペクトラム障害（ASD）における神経ネットワーク障害仮説の神経基盤として重要な役割を担う．周産期にオキシトシンはGABA神経を興奮性から抑制性にシフトし，その欠如がASDの発症に関連するとされ，近年オキシトシンはASDの治療薬として注目されている．一方，γ帯域律動はGABA神経活動を，また複雑ネットワーク理論は神経ネットワーク活動を探る手段として注目されている．
本研究では，新規複雑ネットワーク解析を開発し、それらを駆使した脳磁図解析によってASDにおけるGABA神経活動および神経ネットワークの障害を浮き彫りにし，さらにオキシトシンの治療効果を踏まえて検討した．GABAergic dysfunction plays a crucial role in the pathogenesis of aberrant neural network hypothesis in autism spectrum disorder (ASD). The perinatal excitatory-to-inhibitory shift of GABA is mediated by oxytocin. The deficit of this oxytocin-mediated GABA inhibition reportedly associates with the prevalence of ASD. Therefore, oxytocin has been receiving great attention as a neuroprotective agent of ASD.
Gamma-band oscillatory activity is reportedly involved in mediating GABAergic activity. Additionally, complex network theory is a useful approach in understanding brain network. This research aimed to elucidate therapeutic mechanisms of oxytocin in ASD using MEG with newly developed analysis methods.研究課題/領域番号:16K10206, 研究期間(年度):2016-04-01 – 2019-03-31出典：研究課題「神経ネットワーク障害仮説に着目した自閉性障害におけるオキシトシン作用機序の解明」課題番号16K10206
（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-16K10206/16K10206seika/)を加工して作成research repor
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
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