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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
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
Prediction Of The Solubility Of Aromatic Compounds From Brazilian Roasted Coffee (2-methylpyrazine; 2-furfurylalcohol; 2,5-dimethylpyrazine; γ-butyrolactone And 2-furfurylacetate) In Sc-co2
No full textThe solubility data for a mixture of five compounds present in the aromatic fraction of Brazilian roasted coffee (2-methylpyrazine, 2-furfurylalcohol, 2,5-dimethylpyrazine, γ-butyrolactone and 2-furfurylacetate) in supercritical carbon dioxide (SC-CO2) were determined at pressures from 250 to 300 bar and temperatures from 40 to 70°C. The solubilities of each of these five pure compounds in SC-CO2 were also determined at 250 bar at the same temperatures. These compounds represent important classes of the coffee aroma (pyrazines, furans and lactones) and the data presented in this work is valuable to assess the solubility behavior of the aromatic fraction of roasted coffee oil in SC-CO2. Data modeling was carried out using the Peng-Robinson equation of state with the classical mixing rule proposed by van der Waals (PR) and the empirical composition mixing rule of Stryjek-Vera (PR-SV) to describe the behaviour of the supercritical fluid phase. These models were used to determine the binary interaction parameters for 2-methylpyrazine(2)-SC-CO2(1), 2-furfurylalcohol(3)-SC-CO2(1), 2,5-dimethylpyrazine(4)-SC-CO2(1), γ-butyrolactone(5)-SC-CO2(1) and 2-furfurylacetate(6)-SC-CO2(1). Maximum solubility was observed for these compounds between 45 and 60°C at both pressures. The experimental solubility data were predicted by the PR and PR-SV models for the binary mixtures but not for the mixture of all five compounds. Experimental data presented in this work contributes to a better understanding of the extractability of roasted coffee oil using SC-CO2. © 2009 The Society of Chemical Engineers, Japan.424219230Bemis-Young, G.L., Huang, J., Bernhard, R.A., Effect of pH on Pyrazines Formation in Glucose-Glycine Model Systems (1993) Food Chem., 46, pp. 383-387Buttery, R.G., Orts, W.J., Takeoka, G.R., Nam, Y., Volatile Flavor Components of Rice Cakes (1999) J. Agric. Food Chem., 47, pp. 4353-4356D'agostino, A., Negroni, M., Arnoldi, A., Autoxidation in the Formation of Volatiles from Glucose-Lysine (1998) J. Agric. Food Chem., 46, pp. 2554-2559Dart, S.K., Nursten, H.E., Volatile Components (1985) Coffee Chemistry, pp. 223-265. , 1st ed., R. J. Clarke and R. Macrae eds., Elsevier Applied Science Publishers, London, U.KFrield, P., Krampl, V., Radford, T., Renner, J.A., Shephard, F.W., Gianturco, M.A., Some Constituents of the Aroma Complex of Coffee (1971) J. Agric. Food Chem., 19, pp. 530-532Hashim, L., Chaveron, H., Use of Methylpyrazine Ratios to Monitor the Coffee Roasting (1995) Food Res. Int., 28, pp. 619-623Hwang, H.-I., Hartman, T.G., Rosen, R.T., Ho, C.-T., Forma-tion of Pyrazines from Maillard Reaction of Glucose and Glutamine-Amide-15 N (1993) J. Agric. Food Chem., 41, pp. 2112-2115Joback, K.G., Reid, R.C., Estimation of Pure-Component Properties from Group-Contributions (1987) Chem. Eng. Commun., 57, pp. 233-243Jung, M.Y., Bock, J.Y., Baik, S.O., Lee, J.H., Lee, T.K., Effects of Roasting on Pyrazine Contents and Oxidative Stability of Red Pepper Seed Oil Prior to Its Extraction (1999) J. Agric. Food Chem., 47, pp. 1700-1704Jusino, M.G., Ho, C.-T., Tong, C.H., Formation Kinetics of 2,5-Dimethylpirazine and 2-Methylpirazine in Solid Model System Consisting of Amioca Starch, Lysine and Glucose (1997) J. Agric. Food Chem., 45, pp. 3164-3170Khan, N.A., Brow, J.B., The Composition of Coffee Oil and Its Component Fatty Acids (1953) J. Am. Oil Chem. Soc., 30, pp. 606-609Leahy, M.M., Reineccius, G.A., Kinetics Formation of Alkylpyrazines (1989) Flavour Chemistry: Trends and Developments, ACS Symposium Series, p. 246. , Chapter 7, R. Teranishi, R. G. Buttery and F. Shahidi eds., ACS, Washington, U.S.ALiardon, R., Ott, U., Application of Multivariate Statistics for the Classification of Coffee Headspace Profiles (1984) Lebensm. Wiss. Thechnol., 17, pp. 32-38Maeztu, L., Sanz, C., Andueza, S., Paz de Peña, M., Bello, J., Cid, C., Characterization of Espresso Coffee Aroma by Static Headspace GC-MS and Sensory Flavour Profile (2001) J. Agric. Food Chem., 49, pp. 5437-5444Mathias, P.M., Klotz, H.C., Prausnitz, J.M., Equation of State Mixing Rules for Multicomponent Mixtures: The Problem of Invariance (1991) Fluid Phase Equilib., 67, pp. 31-44Nichtnennung, A.A., Procedure to Extract Flavouring Ingredients from Coffee Oil (1995), (in German), German Federal Republic Patent 4,335,321 A1Oliveira, A.L., Cabral, F.A., Use of Peng-Robinson Equation of State with a Composition Dependent Mixture Rule in the Prediction of Phase Equilibrium for the CO2-Limonene-Citral Ternary System (1997) Ciências e Tecnologia de Alimentos, 17, pp. 489-493Oliveira, A.L., Silva, S.S., da Silva, M.A.P., Eberlin, M.N., Cabral, F.A., Sensory and Yield Response Surface Analysis of Supercritical CO2 Extracted Aromatic Oil from Roasted Coffee (2001) J. 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Chromatogr., 10, pp. 244-247Roselius, W., Vitzthum, O., Hubert, P., (1982) Method of Extracting Coffee Oil Containing Aroma Constituents from Roasted Coffee, 328, p. 255. , U.S. Patent 4Sanagi, M.M., Hung, W.P., Yasir, S.M., Supercritical Fluid Extraction of Pyrazine in Roasted Cocoa Beans-Effect of Pod Storage Period (1997) J. Chromatogr., A, 785, pp. 361-367Semmelroch, P., Grosch, W., Analysis of Roasted Coffee Powders and Brews by Gas Chromatography-Olfactometry of Headspace Samples (1995) Lebensm. Wis. Thechnol., 28, pp. 310-313Semmelroch, P., Grosch, W., Studies on Character Impact Odorants of Coffee Brews (1996) J. Agric. Food Chem., 44, pp. 537-543Shimoda, M., Shiratsuchi, H., Nakada, Y., Wu, Y., Osajima, Y., Identification and Sensory Characterization of Volatile Flavor Compounds in Sesame Seed Oil (1996) J. Agric. Food Chem., 44, pp. 3909-3912Shu, C.-K., Pyrazine Formation from Serine and Threonine (1999) J. Agric. Food Chem., 47, pp. 4332-4335Silmar, R., Lüllmann, C., Investigation of Aroma Formation in Robusta Coffee during Roasting (1993) Café Cacao Thé, 37, pp. 142-145Somayajulu, G.R., Estimation Procedures for Critical Constants (1989) J. Chem. Eng. Data, 34, pp. 106-120Stryjek, R., Vera, J.H., PRSV2: A Cubic Equation of State for Accurate Vapor-Liquid Equilibria Calculation (1986) Can. J. Chem. Eng., 64, pp. 820-826Velezmoro, C.E., Oliveira, A.L., Cabral, F.A., Meirelles, A.J., Prediction of Water Activity in Sugar Solutions Using Models of Group Contribution and Equation of State (2000) J. Chem. Eng. Japan, 33, pp. 645-653Wang, T.H., Shanfield, H., Zlatkis, A., Analysis of Trace Volatile Organic Compounds in Coffee by Headspace Concentration and Gas Chromatography-Mass Spectrometry (1983) Chromatographia, 17, pp. 411-417(1989) CRC Handbook of Data on Organic Compounds, 1. , Weast, R. C. and J. G. Grasselli eds., A-O and Indexes, CRC Press Inc., Boca Raton, U.S.AWilson, L.C., Wilson, H.L., Wilding, W.V., Wilson, G.M., Critical Point Measurements for Fourteen Compounds by a Static Method and a Flow Method (1996) J. Chem. Eng. Data, 41, pp. 1252-125
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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