1,721,369 research outputs found
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No full textItem does not contain fulltextM. Eid Perspectives on Arabic Linguistic I Amsterdam:Banjamins ,199
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
Astrophysics: The process of carbon creation
No full textIn the Universe, the element carbon is created only in stars, in a remarkable reaction called the triple-α process. Fresh insights into the reaction now come from the latest experiments carried out on Earth.Angulo C, 1999, NUCL PHYS A, V656, P3, DOI 10.1016-S0375-9474(99)00030-5; COOK CW, 1957, PHYS REV, V107, P508, DOI 10.1103-PhysRev.107.508; DUNBAR DNF, 1953, PHYS REV, V92, P649, DOI 10.1103-PhysRev.92.649; El Eid MF, 2004, ASTROPHYS J, V611, P452, DOI 10.1086-422162; Fynbo HOU, 2005, NATURE, V433, P136, DOI 10.1038-nature03219; Hoyle Fred, 1954, ASTROPHYS J S, V1, P121, DOI DOI 10.1086-190005; SALPETER EE, 1952, ASTROPHYS J, V115, P326, DOI 10.1086-145546; SALPETER EE, 1952, PHYS REV, V88, P547, DOI 10.1103-PhysRev.88.54766
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
Stellar nucleosynthesis: s-Process in massive stars
No full textThe s-process nucleosynthesis is relatively well understood, at least from the nuclear physics point of view. The site of this important process is believed to be linked to AGB stars and to massive stars. In both cases, the physical conditions underlying the stellar environments where the s-process occurs are still not fully understood and need further elaboration. In this contribution, we give an updated brief overview on the s-process in massive stars pointing out several physical uncertainties still under debate. In particular, we describe the effect of the still uncertain 12C(α ,γ)16O reaction on the s-process. We emphasize the behavior of the s-process during core helium burning and during shell carbon burning. © 2010 American Institute of Physics.Alpizar-Vicente AM, 2008, PHYS REV C, V77, DOI 10.1103-PhysRevC.77.015806; Angulo C, 1999, NUCL PHYS A, V656, P3, DOI 10.1016-S0375-9474(99)00030-5; Buchmann L, 1996, ASTROPHYS J, V468, pL127, DOI 10.1086-310240; Busso M, 1999, ANNU REV ASTRON ASTR, V37, P239, DOI 10.1146-annurev.astro.37.1.239; CAUGHLAN GR, 1988, ATOM DATA NUCL DATA, V40, P283, DOI 10.1016-0092-640X(88)90009-5; CAUGHLAN GR, 1985, ATOM DATA NUCL DATA, V32, P197, DOI 10.1016-0092-640X(85)90006-3; El Eid MF, 2004, ASTROPHYS J, V611, P452, DOI 10.1086-422162; ELEID MF, 2009, SPACE SCI REV, V147; Heil M, 2008, PHYS REV C, V78, DOI 10.1103-PhysRevC.78.025802; Imbriani G, 2001, ASTROPHYS J, V558, P903, DOI 10.1086-322288; Jaeger M, 2001, PHYS REV LETT, V87, DOI 10.1103-PhysRevLett.87.202501; KAPPELER F, 1990, ASTROPHYS J, V354, P630; KAPPELER F, 1989, REP PROG PHYS, V52, P945, DOI 10.1088-0034-4885-52-8-002; Kunz R, 2002, ASTROPHYS J, V567, P643, DOI 10.1086-338384; MEYER BS, 1994, ANNU REV ASTRON ASTR, V32, P153; RAITERI CM, 1991, ASTROPHYS J, V371, P665, DOI 10.1086-169932; ROLFS CE, 1988, CAULDRONS COSMOS, pCH9; STRANIERO O, 2005, ARXIVASTROPH0501405V; The LS, 2007, ASTROPHYS J, V655, P1058, DOI 10.1086-509753; Woosley SE, 2002, REV MOD PHYS, V74, P1015, DOI 10.1103-RevModPhys.74.10150
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
The Multitrait-Multimethod Matrix at 50!
No full textEid M, Nussbeck FW. The Multitrait-Multimethod Matrix at 50!. Methodology: European Journal of Research Methods for the Behavioral and Social Sciences. 2009;5(3):71-71
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