1,720,955 research outputs found
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
Sulphide Stress Cracking in X80 Pipeline Steel Welds
Full text linkThe utilization of high strength linepipes provides various benefits, including reducing construction cost, and operational cost. On the other hand, the girth welds for such pipelines are welded onsite, and simultaneously require strength overmatching of the weld joint, high fracture toughness, and low hardness, regardless of whether these mechanical properties are potentially at odds with each other. Moreover, hardness in the welds must be maintained below HV250 for high strength pipe grades used in natural gas pipelines if they are used for severe sour service applications, where severe sour is defined as SSC region 3 in the NACE standard MR0175/ISO 15156, as the range where H2S partial pressure exceeds 1 kPa, and below a pH of 3.5, and above 100 kPa and below a pH of 5.5. Thus, it is very difficult to employ high strength pipeline materials such as those exceeding API X70 grade for such applications.
This particular hardness criterion has been standardized by NACE standard MR0175/ISO 15156 and European Federation of Corrosion publication number 16 (EFC No.16) to avoid sulphide stress cracking (SSC) initiation, and was determined by experience and testing; however, the tests had been performed several decades ago on rather different steel chemistries than those used today. Since recent steels and weld metals have significantly different chemical composition and grain size, thus this hardness criterion has become controversial. Meanwhile, some recent research papers mention that acicular ferrite is one of the fine microstructures and argued that intragranular can improve resistance to hydrogen embrittlement. Thus, the present work evaluates these issues on API X80 grade weld metals. This involves establishing a control method of acicular ferrite volume fraction in the weld metals. The relationship between kinds of microstructures and SSC susceptibility for GMA weld metals is then compared to validate a critical hardness value. The actual microstructural features which provide a hydrogen trap mechanism in particular are demonstrated for the acicular ferrite microstructure in the GMA weld metal, by using a combination of electron microscopy and hydrogen micro-printing. The role of microstructure on SSC susceptibility and the influence of hydrogen charging on strength and hardness properties are then compared.
The results show that it was possible to produce X80 grade weld metals with differing intragranular ferrite (acicular ferrite) volume fractions, by controlling the relationship between the titanium and oxygen ratio. The most effective balance between titanium and oxygen contents for maximizing intragranular ferrite corresponds to an ideal stoichiometry of Ti2O3. Next, SSC tests are performed in accordance with NACE MR0175/ISO 15156 (using a test solution) based on the (3 and 4 points bending method) on this material with varying intragranular ferrite volume fraction. These results confirm that weld metals exceeding 98% intragranular ferrite volume fraction and low grain boundary ferrite are able to pass the SSC test even if their hardness value exceeded 250HV. Furthermore, in order to reveal the roles of intragranular ferrite microstructure for SSC susceptibility, the hydrogen microprint technique combined with Scanning Electron Microscopy observation was used to compare the microstructures of specimens which passed and failed the SSC test. It was confirmed that grain boundaries within the intragranular ferrite are effective hydrogen trapping sites, and it appeared that nano-carbides prevent motion of dislocations which carrying diffusible hydrogen. Moreover, intragranular ferrite exhibits high toughness due to fine grains which promote crack deflection more effectively than grain boundary ferrite. Thus, it is suggested that intragranular ferrite can increase SSC resistance based on these mechanisms resulting from the desirable microstructural features. Finally, mechanical properties, such as tensile behaviour was investigated following hydrogen charging for two weld metals with differing intragranular ferrite volume fractions. The stress-strain curves for weld metals involving a higher intragranular ferrite volume fraction were less affected by hydrogen compared to the case of low intragranular volume fraction, and this is attributed to the difference of hydrogen trapping as revealed by thermal desorption analysis. In conclusion, this research proposes that intragranular ferrite dominant structures in high strength steels can decrease SSC susceptibility and stabilize mechanical properties in sour environments by providing strong trapping sites
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
- …
