1,721,008 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
The Magnetic And Magnetocaloric Properties Of Gd 5ge 2si 2 Compound Under Hydrostatic Pressure
Get PDFThe Gd5 Ge2 Si2 compound presents a giant magnetocaloric effect with transition temperature at around 276 K and is a very good candidate for application as an active regenerator material in room temperature magnetic refrigerators. Recently it has been shown that pressure induces a colossal magnetocaloric effect in MnAs, a material that presents a giant magnetocaloric effect and a strong magnetoelastic coupling, as also happens with the Gd5 Ge2 Si2 compound. This motivated a search of the colossal effect in the Gd5 Ge2 Si2 compound. This work reports our measurements on the magnetic properties and the magnetocaloric effect of Gd5 Ge2 Si2 under hydrostatic pressures up to 9.2 kbar and as a function of temperature. Contrary to what happens with MnAs, pressure increases the Curie temperature of the compound, does not affect the saturation magnetization and decreases markedly its magnetocaloric effect. © 2005 American Institute of Physics.9710Pecharsky, V.K., Gschneidner Jr., K.A., (1977) Phys. Rev. Lett., 78, p. 4494Pecharsky, V.K., Gschneidner Jr., K.A., (2001) Adv. Mater. (Weinheim, Ger.), 13, p. 683Morellon, L., Algarabel, P.A., Ibarra, M.R., Blasco, J., García-Landa, B., Arnold, Z., Albertini, F., (1998) Phys. Rev. B, 58, p. 14721Del Moral, A., Algarabel, P.A., Arnaudas, J.I., Benito, L., Ciria, M., De La Fuente, C., García-Landa, B., De Teresa, J.M., (2002) J. Magn. Magn. Mater., 242-245, p. 788Pecharsky, A.O., Gschneidner Jr., K.A., Pecharsky, V.K., (2003) J. Magn. Magn. Mater., 267, p. 60Pecharsky, A.O., Gschneidner Jr., K.A., Pecharsky, V.K., (2003) J. Appl. Phys., 93, p. 4722Gama, S., De Campos, A., Carvalho Magnus, A.G., Coelho, A.A., Gandra, F.C.G., Von Ranke, P.J., De Oliveira, N.A., (2004) Phys. Rev. Lett., 93, p. 237202Von Ranke, P.J., De Oliveira, N.A., Gama, S., (2004) J. Magn. Magn. Mater., 277, p. 78Pecharsky, V.K., Gschneidner Jr., K.A., (1998) Adv. Cryog. Eng., 43, p. 1729Menyuk, N., Kafalas, J.A., Dwight, K., Goodenough, J.B., (1969) Phys. Rev., 177, p. 942Morellon, L., Arnold, Z., Algarabel, P.A., Magen, C., Ibarra, M.R., Skorodhod, Y., (2004) J. Phys.: Condens. Matter, 16, p. 162
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
Magnetocaloric Effect And Transport Properties Of Gd5ge2(si1-xsnx)2 (x=0.23 And 0.40) Compounds
No full textWe report a study about the structural properties of polycrystalline samples of nominal composition Gd5Ge2(Si1-xSnx)2 (x=0.23, 0.40) that closely influence their physical behavior particularly related to electric resistivity and magnetocaloric (MCE) effect. The samples were characterized by X-ray diffraction (XRD) using the Rietveld refinement method, metallographic analyses, 119Sn Mössbauer spectroscopy, DC magnetization and electrical transport measurements. It was identified a Gd5Si2Ge2-monoclinic phase for x=0.23 and a Sm5Sn4-orthorhombic phase (type II) for x=0.40, both with two non-equivalent crystallographic sites for the Sn ions. We were able to infer on the role of tin on the magnetic and transport properties in these compounds. © 2007 Elsevier B.V. All rights reserved.3162 SPEC. ISS.368371Campoy, J.C.P., Plaza, E.J.R., Carvalho, A.M.G., Coelho, A.A., Gama, S., von Ranke, P.J., (2004) J. Magn. Magn. Mater., 272, p. 2375Pecharsky, V.K., Gschneidner Jr., K.A., (1997) J. Alloys Compds., 260, p. 98Morellon, L., Blasco, J., Algarabel, P.A., Ibarra, M.R., (2000) Phys. Rev. B, 62, p. 1022Wang, H.B., Altounian, Z., Ryan, D.H., (2002) Phys. Rev. B, 66, p. 214413Greenwood, N.N., Perkins, P.G., Wall, D.H., (1967) Symp. Faraday Soc., 1, p. 51Pecharsky, V.K., Gschneidner Jr., K.A., (1997) Phys. Rev. Lett., 78, p. 4494Sousa, J.B., Braga, M.E., Correia, F.C., Carpinteiro, F., Morellon, L., Algarabel, P.A., Ibarra, M.R., (2003) Phys. Rev. B, 67, p. 134416Levin, E.M., (1999) Phys. Rev. B, 60, p. 7993Levin, E.M., (2001) Phys. Rev. B, 63, p. 064426Levin, E.M., (2000) J. Magn. Magn. Mater., 210, p. 18
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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