1,720,973 research outputs found
Shear-induced particle migration: Predictions from experimental evaluation of the particle stress tensor
No full textThis paper addresses the modeling of the phenomenon of particle migration in the flow of monodispersed non-colloidal suspensions at neglected inertia using the Suspension Balance Model (SBM). The SBM describes the migration flux of particles as the divergence of the particle stress tensor. It is selected in this work because of its parameters that can be measured experimentally and its capability to quantify well the shear-induced migration phenomenon. A recent experiment [10,11] reported measurements of the different parameters in the SBM, which are used in this work to study their effects on the prediction of the particle migration phenomenon. For that purpose, a two-dimensional solver capable of solving the set of conservation equations of the SBM using the finite volume method is developed within the OpenFOAM® CFD toolbox [34]. The code is validated by simulating the suspension flows in a channel of rectangular cross-section, and in a wide gap Couette cell. Solutions are generated using the newly measured SBM parameters, and results are compared to similar ones obtained using the old SBM parameters. It is found that the new measured parameters have no significant influence on prediction of particle migration as compared to those proposed in the literature. Finally, the SBM is extended to general two-dimensional flows through a frame-invariant formulation that takes into account the local kinematics of the suspension including buoyancy effects. The frame-invariant model is applied to the resuspension and mixing of a monodispersed suspension in a horizontal Couette cell. The predicted results are found to be in good agreement with experimental measurements. © 2013 Elsevier B.V.Bird RB, 1987, DYNAMICS POLYM LIQUI, V1; Blanc F., 2011, PHYS REV LETT OCT; Boyer F., 2011, UNIFYING SUSPENSION; Boyer F., 2011, J FLUID MECH, P272; Brady JF, 1997, J FLUID MECH, V348, P103, DOI 10.1017-S0022112097006320; Chapman BK, 1990, THESIS U NOTRE DAME; Couturier E, 2011, J FLUID MECH, V686, P26, DOI 10.1017-jfm.2011.315; CRANK J, 1947, P CAMB PHILOS SOC, V43, P50; DAVIS RH, 1985, ANNU REV FLUID MECH, V17, P91, DOI 10.1146-annurev.fl.17.010185.000515; Dbouk T., 2012, THESIS U NICE SOPHIA; Dbouk T, 2013, J FLUID MECH, V715, P239, DOI 10.1017-jfm.2012.516; Deboeuf A, 2009, PHYS REV LETT, V102, DOI 10.1103-PhysRevLett.102.108301; Deboeuf A., 2008, THESIS PIERRE M CURI; Drew D. A., 1993, PARTICULATE 2 PHASE; Fang ZW, 2002, INT J MULTIPHAS FLOW, V28, P137, DOI 10.1016-S0301-9322(01)00055-6; GADALAMARIA F, 1980, J RHEOL, V24, P799, DOI 10.1122-1.549584; Gadala-Maria F.A., 1979, THESIS STANFORD U; Goldsmith H.L., 1967, RHEOLOGY THEORY APPL, V4, P86; LEIGHTON D, 1987, J FLUID MECH, V177, P109, DOI 10.1017-S0022112087000880; LEIGHTON D, 1987, J FLUID MECH, V181, P415, DOI 10.1017-S0022112087002155; LEIGHTON D, 1986, CHEM ENG SCI, V41, P1377, DOI 10.1016-0009-2509(86)85225-3; Lhuillier D, 2009, PHYS FLUIDS, V21, DOI 10.1063-1.3079672; Lyon MK, 1998, J FLUID MECH, V363, P25, DOI 10.1017-S0022112098008817; Maron S.H., 1956, J COLLOID SCI, V11, P162; Merhi D, 2005, J RHEOL, V49, P1429, DOI 10.1122-1.2079247; Miller RM, 2006, J NON-NEWTON FLUID, V135, P149, DOI 10.1016-j.jnnfm.2005.11.009; Miller RM, 2009, CHEM ENG SCI, V64, P4597, DOI 10.1016-j.ces.2009.04.033; Miller R.M., 2004, THESIS SCH CHEM BIOM; Morris JF, 2002, PHYS FLUIDS, V14, P1920, DOI 10.1063-1.1476745; Morris JF, 1998, INT J MULTIPHAS FLOW, V24, P105, DOI 10.1016-S0301-9322(97)00035-9; Morris JF, 1999, J RHEOL, V43, P1213, DOI 10.1122-1.551021; Nott PR, 2011, PHYS FLUIDS, V23, DOI 10.1063-1.3570921; NOTT PR, 1994, J FLUID MECH, V275, P157, DOI 10.1017-S0022112094002326; Patankar S. V., 1980, NUMERICAL HEAT TRANS; PHILLIPS RJ, 1992, PHYS FLUIDS A-FLUID, V4, P30, DOI 10.1063-1.858498; Rao R, 2002, INT J NUMER METH FL, V39, P465, DOI 10.1002-fld.246; RHIE CM, 1983, AIAA J, V21, P1525, DOI 10.2514-3.8284; Richardson J.F., 1954, T I CHEM ENG-LOND, V32, P35; Ryssel E, 1999, J NON-NEWTON FLUID, V86, P309, DOI 10.1016-S0377-0257(99)00003-8; SCHAFLINGER U, 1990, INT J MULTIPHAS FLOW, V16, P567, DOI 10.1016-0301-9322(90)90017-D; Schunk P.R., 1990, J RHEOL, V34; Sierou A, 2002, J RHEOL, V46, P1031, DOI 10.1122-1.1501925; Singh A, 2003, J FLUID MECH, V490, P293, DOI 10.1017-S0022112003005366; Yeo K, 2010, J COMPUT PHYS, V229, P2401, DOI 10.1016-j.jcp.2009.11.041; Yeo K., 2010, J FLUID MECH, V649; Yurkovetsky Y, 2008, J RHEOL, V52, P141, DOI 10.1122-1.2807443; Zarraga IE, 2000, J RHEOL, V44, P185, DOI 10.1122-1.5510832
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
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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