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アレイセンサ型反射光パルスオキシメータの試作開発
Get PDF近赤外光を用いた無侵襲血中酸素飽和度計測法(オキシメトリ)として,透過光を用いたパルスオキシメトリ(動脈血酸素飽和度(Sa02)計測法)は,既に幅広く利用されており,さらに反射光を用いた方法は,額・胸部といった様々な部位への適用が可能であることから臨床上さらなる活用が期待されている.
ここでは,パルスオキシメトリの測定精度を高めるために複数の受光部(アレイセンサ)を用いたパルスオキシメータの試作開発を行った.センサを開発する過程において,測定精度・測定誤差の予想が可能となる光拡散理論・モンテカルロ法を用い,センサの送・受光間隔や,測定波長,組織内血液の容積変化などを取り入れたモデルを作成し,センサのデザイン(CAD : Computer Aided Design)を行った.
結果として,アレイセンサ方式の一つである空間分解分光法を試みたが,従来式の単一の受光部を用いた方法と比較して大幅な改善は得られなかったため今後も複数検出部の特性を生かし,光強度変調法との併用など,様々な計測法の検討を行う予定である.しかしながら,光電容積信号の基線変動分を使用することにより新たな指標として静脈血酸素飽和度(Sv02)の可能性が実験的・理論的に示された.従来,光を用いた組織オキシメータには,生理学的根拠の不明確なSt02といった指標が使われてきたが,ここで提案するSv02は,生理学的に明確な値であり,さらにSa02とSv02を用いることにより組織の酸素代謝量に関連する指標を導出ことが可能となった.
また,適応信号処理の方法として,700-1600nmにおいてケモメトリツクスの適用を行った.この方法は統計学的手法による解析法のため,実験データが膨大になるが,場合によっては光拡散理論の結果を大幅に超える高精度な結果を得ることも確認した.研究課題/領域番号:12780635, 研究期間(年度):2000-2001出典：「アレイセンサ型反射光パルスオキシメータの試作開発」研究成果報告書 課題番号 12780635（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/ja/grant/KAKENHI-PROJECT-12780635/)を加工して作成金沢大学理工研究域research repor
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
Development of non-invasive near-infrared assessment system for intrauterine fetal well-being
Get PDFToward a development of non-invasive near-infrared assessment system for intrauterine fetal well-being, we have evaluated the performance of the proposed system, which offers non-invasive transabdominal measurement of fetal arterial oxygen saturation, with pregnant women in regular prenatal care. The proposed system consists of three major parts: a two-wavelength transabdominal fetal photo-plethysmography (750/830nm), frequency domain signal extraction procedure of fetal plethysmogram from transabdominal photo-plethysmogram, and non-blood drawing sensor calibration procedure based on radiative transfer for safe and reliable non-invasive fetal arterial oxygen saturation measurement. As a result of the clinical trials, the non-invasive fetal assessment system could offer acceptable normal arterial oxygen saturation ranges of intrauterine fetuses: 50-70%. 近赤外光による非侵襲的子宮内胎児機能診断システムの臨床評価にあたり，胎児血中酸素飽和度の非侵襲測定を実現するには，従来，事前に複数の胎児を対象に低酸素負荷時に採血試験を行い，光センサ出力との関係を校正する必要があった．しかしながら，このような校正法は危険を伴うため，光散乱理論を用い，妊婦腹部を模擬した数値モデルにおいて，子宮内胎児の光電容積信号（波長：750/830nm）から血中酸素飽和度を求める校正曲線を理論的（非採血的）に導出した．実際の妊婦腹部表面から得られた光電容積信号を用いて評価した結果，それぞれの酸素飽和度は生理学的な正常値（母体：98％前後，胎児：50～70％前後）を示した．研究課題/領域番号:24500540, 研究期間(年度):2012-04-01 – 2015-03-31出典：研究課題「近赤外光による非侵襲的子宮内胎児機能診断システムの臨床評価」課題番号24500540
（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-24500540/24500540seika/)を加工して作成金沢大学理工学域機械工学系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
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
経胸壁的体心部静脈血酸素飽和度計測による非侵襲全身酸素代謝計測システムの開発
Get PDF本研究では，新たな非侵襲医用光計測システムとして，「体心部静脈血酸素飽和度計測による非侵襲全身酸素代謝計測システムの開発」を行う．近年の光学・電子回路素子の高精度化に伴い，表層組織だけではなく，深部組織を伝播した光も微弱ながら体表面から計測が可能となってきている．このことから，計測対象を深部組織である肺動脈血もしくは頸部静脈とし，ここに近赤外光による血中酸素飽和度計測法を適用することにより，非侵襲的に深部動静脈脈血酸素飽和度較差，すなわち全身・頭部酸素代謝量の連続計測が可能な多波長光電脈波分光システムを実現することが出来た．今後，医療の現場における積極的な利用促進を行う予定である．Toward a development of a new noninvasive deeper tissue, possibly whole body, oxygen utilization measurement system, we have developed a noninvasive arterio-venous oxygen saturation: SaO2 and SvO2 measurement system comprising a miniature spectrophotometer and broader multiwavelength LEDs for measuring multiwavelength reflectance photoplethysmograms. These unknown physiological values: SaO2, SvO2, and so forth; i.e. tissue blood content, were determined by multi-objective numerical optimization technique through fitting multiple scattering-based theoretical generated photoplethsmographic data to noninvasive measurement ones. The applicability of the noninvasive arterio-venous oxygen saturation measurement system was successfully demonstrated with healthy human subjects. We will conduct some clinical studies with the newly developed noninvasive arterio-venous oxygen saturation measurement system, especially for early detection and management of septic and severe conditions of COVID-19.研究課題/領域番号:13555218, 研究期間(年度):2017-04-01 - 2020-03-31出典：「経胸壁的体心部静脈血酸素飽和度計測による非侵襲全身酸素代謝計測システムの開発」研究成果報告書 課題番号13555218
（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-17K01407/17K01407seika/)を加工して作成公立小松大学 / 金沢大学理工研究域機械工学系research repor
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