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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
Dan kong que zhong xin liang zi chuan gan yu ji duan huan jing
No full textM.Phil.Hydrostatic pressure is one of the most successful tuning parameters in doing material research, which changes the material properties without introducing additional chemical inhomogeneity to the sample. Nonetheless, to ensure an ultra high pressure, the accessibility to the sample is highly restricted. Cryogenic condition places further restrictions. These limit the studies of pressure-induced phenomena. Here, we demonstrate the use of nitrogen vacancy (NV) center in diamond as a spatial-resolved vector field sensor for material research under extreme conditions.NV center is a point defect in diamond with substitutional nitrogen atom and an adjacent lattice carbon vacancy. Interestingly, NV center is robust under extreme conditions but still highly sensitive to environmental changes. Its particular electronic structure and spin-state dependent inter-system crossing lead to the optical spin initialization and readout, thus we can extract various physical parameters from optically detected magnetic resonance (ODMR) spectrum.One of the interesting physics to study in cryogenic temperature is the Meissner effect, which is the phenomenon that magnetic field expelled by a superconductor. The major advantage of NV center quantum sensing is its high magnetic field sensitivity, thus it is promising to determine both the critical temperature \textit{T\textsubscript{c}} and the lower critical field \textit{H\textsubscript{c1}} under pressure. Furthermore, NV center can sense both the magnetic field strength and the magnetic field direction, thus we can reconstruct the magnetic field vector and visualize directly the bending of the magnetic field around a superconductor during phase transitions. In general, we can map the whole magnetic field profile around a superconductor during the transition with our technique.We implement ODMR using NV center inside nano or micro scale diamond particle as a local magnetic field sensor under high pressure, which can be considered as a novel technique combining the advantages of both the state of the art measurement protocols AC susceptibility and superconducting quantum interference device (SQUID).Another application of NV center quantum sensing is the pressure sensing and pressure gradient mapping, which plays an essential role of high pressure physics. We can calibrate the pressure dependence of NV center and make it a robust pressure sensor. With NV centers in nano-diamond spread throughout the pressure medium, we can implement ODMR and extract the pressure experienced by individual diamond particles, thus map the pressure gradient of the pressurized region with high spatial resolution and accuracy. We can also perform the measurement in cryogenic temperature and monitor the pressure. We can also perform the measurement in cryogenic temperature and monitor the pressure. To conclude, the spatial resolution and precision of using NV center in pressure sensing are better than the commonly used pressure sensors such as ruby.靜水壓力作為材料研究領域最出色的可調參數之一，在改變材料特性的同時不會給樣品帶來額外的化學不均勻性。不過要確保一個靜水壓力環境以及低溫條件會在極大程度上限製樣品的可接近性，這無疑阻礙了壓力誘發現象的研究。在本論文中，我們將使用金剛石中的氮空缺中心作為空間可分辨矢量場傳感器進行極端條件下的材料研究。氮空缺中心是由金剛石中單取代氮原子及其相鄰的碳空位所構成的點缺陷。特別有吸引力的是，即使在極端條件下氮空缺中心也具備著穩定的指示環境變化的性能。此外，氮空缺中心特定的電子結構以及其自旋依賴的系統間跨越允許光學的自旋初始化和讀出。借助光學探測磁共振譜圖，我們可以獲得氮空缺中心的眾多物理參數。低溫研究中的一個有趣的物理現像是邁斯納效應，它描述了超導體從一般狀態相變至超導態的過程中對磁場的排斥行為。得益於氮空缺中心的高磁場靈敏度，我們有望確定出在高壓下樣品的臨界溫度和下臨界場大小。此外，氮空缺中心也可以用來感知磁場的強度和方向，通過重建磁場矢量我們可以直接觀察到相變期間超導體周圍磁場的彎曲情況，進而測繪出過渡期間超導體周圍的整個磁場分佈圖。可以這樣說，以納米級或微米級金剛石中的氮空缺中心為高壓局部磁場傳感器實施光學探測磁共振譜圖的測量，無疑是結合了最先進的交流磁化率的測量以及超導量子乾涉裝置的優點的新技術。另外，氮空缺中心也可以應用於壓力傳感方面，例如進行系統內壓力梯度的測繪，這在高壓物理學領域中發揮著重要的作用。我們通過校準氮空缺中心的壓力依賴性，使其成為一個強大的壓力傳感器。借助於氮空缺中心的超小尺寸以及測量系統的空間高分辨率，我們有機會提取到受壓區域內各個氮空缺中心的信息，從而高精度地繪製加壓區域的壓力梯度。我們亦可在低溫下進行壓力的測量和監測。總括而言，氮空缺中心的空間分辨率及精度比常用的壓力傳感器如紅寶石更好。Ho, Kin On = 氮空缺中心量子傳感於極端環境 / 何健安.Thesis M.Phil. Chinese University of Hong Kong 2019.Includes bibliographical references (leaves 89-99).Abstracts also in Chinese.Title from PDF title page (viewed on 20 May, 2021).Ho, Kin On = Dan kong que zhong xin liang zi chuan gan yu ji duan huan jing / He Jianan
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
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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