1,720,973 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
Experimental Campaign, Modeling, And Sensitivity Analysis For The Molecular Distillation Of Petroleum Residues 673.15k+
No full textThis research activity proposes a sensitivity analysis of the molecular distillation process by focusing the attention on the response of the overall distillate flow rate under several conditions of distillation temperature and feed flow rate. Specific equations to characterize physicochemical properties of petroleum residues have been formulated by means of ASTM-based experimental campaigns combined with specific optimization techniques.The steady state refining process simulator by Petrobras coupled with appropriate finite-difference methods is adopted for the simulation of a heated and extremely low-pressure falling film evaporator to separate a heavy residue 673.15. K+ of Gamma. +. Sigma crude oil. Numerical results are validated on the experimental points. © 2011.902243258Amin, M.B., Beg, S.A., Kinematic viscosity-temperature behavior of heavy TBP-fractions (455°C+) of Arabian crude oils (1993) Fuel Sci. Technol. Int., 11, pp. 1425-1439(2008), ASTM D 70. Annual Book of ASTM Standards, American Society for Testing and Materials. Standard Test Method for Density of Semi-Solid Bituminous Materials (Pycnometer Method). ASTM International, PA. In press(2005), ASTM E 1269. Annual Book of ASTM Standards, American Society for Testing and Materials. Standard Test Method for Determining Specific Heat Capacity by Differential Scanning Calorimetry. ASTM International, PA. In press(2008), ASTM D 2503. Annual Book of ASTM Standards, American Society for Testing and Materials. Standard Test Method for Relative Molecular Mass (Molecular Weight) of Hydrocarbons by Thermoelectric Measurement of Vapor Pressure. ASTM International, PA. In press(2005), ASTM D 2892. Annual Book of ASTM Standards, American Society for Testing and Materials. Standard Test Method for Distillation of Crude Petroleum (15-Theoretical Plate Column). ASTM International, PA. In pressASTM D 4124. Annual Book of ASTM Standards, American Society for Testing and Materials (2009), Standard Test Method for Separation of Asphalt into Four Fractions. ASTM International, PA. In pressBallesteros, H.J.A., Zuñiga, L.L., Jardini, A., Wolf Maciel, M.R., Maciel Filho, R., Medina, L.C., Determination of a physical-chemical parameter for modeling process of molecular distillation (2009) Chem. Eng. Trans., 17, pp. 1789-1794Barros, N.B., Scarminio, I.S., Bruns, R.E., (2003) Como fazer experimentos: pesquisa e desenvolvimento na ciência e na indústria, , UNICAMP, CampinasBatistella, C.B., Wolf Maciel, M.R., Modeling, simulation and analysis of molecular distillators: centrifugal and falling film (1996) Comput. Chem. Eng., 20, pp. 19-24Batistella, C.B., Wolf Maciel, M.R., Recovery of carotenoids from palm oil by molecular distillation (1998) Comput. Chem. Eng., 22, pp. 53-60Batistella, C.B., Tecnologia da destilação molecular: da modelagem matemática à obtenção de dados experimentais aplicada a produtos de química fina (1999), Thesis, State University of CampinasBatistella, C.B., Maciel, M.R.W., Maciel Filho, R., Rigorous modeling and simulation of molecular distillators: development of a Simulator under condition of non ideality of the vapor phase (2000) Comput. Chem. Eng., 24, pp. 1309-1315Batistella, C.B., Moraes, E.B., Maciel, Filho, R., Wolf Maciel, M.R., Molecular distillation, rigorous modeling and simulation for recovering vitamin E from vegetal oils (2002) Appl. Biochem. Biotechnol., pp. 1187-1206Box, G.E.P., Lucas, H.L., Design of experiments in nonlinear situations (1959) Bioka, 46, pp. 77-90Box, M.J., An experimental design criterion for precise estimation of a subset of the parameters in a nonlinear model (1971) Bioka, 58, pp. 149-153Brandão Pinto, U., Use of high temperature simulated distillation analysis for extrapolating true boiling point curve of crude oils (2002) Bol. Técnico Petrobras, 45, pp. 343-349Buzzi-Ferraris, G., Manenti, F., Kinetic models analysis (2009) Chem. Eng. Sci., 64, pp. 1061-1074Carnahan, B., Luther, H.A., Wilkes, J.O., (1969) Applied Numerical Methods, , John Wiley & Sons, Inc., New YorkChen, F., Cai, T., Zhao, G., Liao, X., Guo, L., Hu, X., Optimizing conditions for the purification of crude octacosanol extract form rice bran wax by molecular distillation analyzed using response surface methodology (2005) J. Food Eng., 70, pp. 47-53Cvengroš, J., Lutišan, J., Micov, M., Feed temperature influence on the efficiency of a molecular evaporator (2000) Chem. Eng. J., 78, pp. 61-67Cvengroš, J., Pollák, Š., Micov, M., Lutišan, J., Film wiping in the molecular evaporator (2001) Chem. Eng. J., 81, pp. 9-14De Andrande Ferreira, A., Radler De Aquino Neto, F., Simulated distillation in the petroleum industry (2005) Qumica Nova, 28, pp. 478-482Franceschini, G., Macchietto, S., Novel anticorrelation criteria for model-based experiment design: theory and formulations (2008) AIChE J, 54, pp. 1009-1024Hickman, K.C.D., High-vacuum short-path distillation-a review (1943) Chem. Rev., 34, pp. 51-106Hosten, L.H., A sequential experimental design procedure for precise parameter estimation based upon the shape of the joint confidence region (1974) Chem. Eng. Sci., 29, pp. 2247-2252Kawala, Z., Stephan, K., Evaporation rate and separation factor of molecular distillation in a falling film apparatus (1989) Chem. Eng. Technol., 12, pp. 406-413Lutišan, J., Cvengroš, J., Mean free path of molecules on molecular distillation (1995) Chem. Eng. J., 56, pp. 39-50Lutišan, J., Cvengroš, J., Micov, M., Heat and mass transfer in the evaporating film of a molecular evaporator (2002) Chem. Eng. J., 85, pp. 225-234Maciel Filho, R., Batistella, C.B., Sbaite, P., Winter, A., Vasconcelos, C.J.G., Wolf Maciel, M.R., Gomes, A., Kunert, R., Evaluation of atmospheric and vacuum residues using molecular distillation and optimization (2006) Pet. Sci. Technol., 24, pp. 275-283Merdrignac, I., Espinat, D., Physicochemical characterization of petroleum fractions: the state of the art (2007) Oil Gas Sci. Technol., 62, pp. 7-32Micov, M., Lutišan, J., Cvengroš, J., Balance equations for molecular distillation (1997) Sep. Sci. 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Technol., 40, pp. 1371-1386Zuñiga, L.L., Modelagem e simulação do processo de destilação molecular e determinação experimental aplicado a resíduos pesados de petróleos (2009), Thesis, State University of CampinasZuñiga, L.L., Lima, N.M.N., Batistella, C.B., Wolf Maciel, M.R., Maciel Filho, R., Medina, L.C., Correlação para predizer as massas moleculares de cortes pesados de petróleo (2008) Rev. Petro Química, 304, pp. 67-72Zuñiga, L.L., Lima, N.M.N., Wolf Maciel, M.R., Maciel Filho, R., Medina, L.C., Manenti, F., Análise reológica de resíduos pesados de petróleo. Aplicação ao processo de destilação molecular (2010) Rev. Petro Química, 327, pp. 46-53Zuñiga, L.L., Lima, N.M.N., Wolf Maciel, M.R., Maciel Filho, R., Medina, L.C., Embiruçu, M., Correlation for predicting the molecular weight of Brazilian petroleum residues and cuts: An application for the simulation of a molecular distillation process (2011) J. Pet. Sci. 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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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