1,720,980 research outputs found
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
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
Ethanol/water Pulps From Sugar Cane Straw And Their Biobleaching With Xylanase From Bacillus Pumilus
No full textThe influence of independent variables (temperature and time) on the cooking of sugar cane straw with ethanol/water mixtures was studied to determine operating conditions that obtain pulp with high cellulose contents and a low lignin content. An experimental 22 design was applied for temperatures of 185 and 215°C, and time of 1 and 2.5 h with the ethanol/water mixture concentration and constant straw-to-solvent ratio. The system was scaled-up at 200°C cooking temperature for 2 h with 50% ethanol-water concentration, and 1:10 (w/v) straw-to-solvent ratio to obtain a pulp with 3.14 cP viscosity, 58.09 kappa-number, and the chemical composition of the pulps were 3.2% pentosan and 31.5% lignin. Xylanase from Bacillus pumilus was then applied at a loading of 5-150 IU/g dry pulp in the sugar cane straw ethanol/water pulp at 50°C for 2 and 20 h. To ethanol/water pulps, the best enzyme dosage was found to be 20 IU/g dry pulp at 20 h, and a high enzyme dosage of 150 IU/g dry pulp did not decrease the kappa-number of the pulp. © 2007 Humana Press Inc.137-14001/12/15501513www.http://caminhosdocampo.com.br, O Globo. Access 10 August 2006http//www.cenbio.br, Access 14 April 2003Gonçalves, A.R., Benar, P., Costa, S.M., (2005) Appl. Biochem. Biotechnol., 121-124, pp. 821-826Roncero, M.B., Torres, A.L., Colom, J.F., Vidal, T., (2003) Bioresour. Technol., 87, pp. 305-314Jiménez, L., Perez, I., García, J.C., López, F., Ariza, J., (2000) Process Biochem., 35, pp. 685-691Jiménez, L., Torre, M.J., Ferrer, J.L., García, J.C., (1999) Process Biochem., 35, pp. 143-148Khristova, P., Tomkinson, J., Jones, G.L., (2003) Ind. Crops Prod., 18, pp. 101-110Khristova, P., Tomkinson, J., Valchev, L., Dimitrov, I., Jones, G.L., (2003) Bioresour. Technol., 85, pp. 79-85Jiménez, L., Bonilla, J.L., Ferrer, J.L., Pérez, L., (1998) Afinidad, 55, pp. 133-138. , 747Asiz, S., Sarkanen, K., (1989) Tappi J., 72, pp. 169-175. , 3Stockburger, P., (1993) Tappi J., 76, pp. 71-74. , 6Dahlmann, G., Schroeter, M.C., (1990) Tappi J., 73, pp. 237-240. , 4Black, N.P., (1991) Tappi J., 74, pp. 87-93. , 4Pohjanvesi, S., Saari, K., Poppius-Levlin, K., Sundquist, J., (1995) Proceedings of the 8th International Wood and Pulping Congress, 2, pp. 231-236. , HelsinkiDapia, S., Santos, V., Parajo, J.C., (2000) J. Wood Chem. Technol., 20, pp. 395-413. , 4Obracea, P., Cimpoesu, G., (1998) Cell Chem. Technol., 32, pp. 517-525. , 5-6Christov, L.P., Akhtar, M., Prior, B.A., (2007) Holzforschung, 50, pp. 579-582Christov, L.P., Akhtar, M., Prior, B.A., (1998) Enzyme Microbiol. Technol., 23, pp. 70-74. , 70-74Bajpai, P., (1999) Biotechnol. Prog., 15, pp. 147-157. , 2Senior, D.J., Mayers, P.R., Saddler, J.N., (1991) Biotechnol. 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Biotechnol., 23, pp. 257-270(1985) TAPPI Stand. Methods_T, , TAPPI 236 cm-85(1982) TAPPI Stand. Methods_T, , TAPPI 230 om-82Dence, C.W., Lin, Y.L., Dence, C.W., (1992) Methods in Lignin Chemistry, pp. 33-61. , Springer BerlinRocha, G.J.M., (2000) Deslignificação de Bagaço de Cana-de- açúcar Assistida Por Oxigênio, p. 40. , São Carlos: Universidade de São Paulo/Instituto de Química de São Carlos. PhD. Thesis, Brazil 41Faix, O., Bottcher, J. H., and Berlelt, E. (1992), In: The International Society for Optical Engineering. Heise, M., Korte, E. H., and Siesler, H. W. (eds.), San Diego, CA, pp. 428-430Morohoshi, N., Hon, D.N.S., Shiraishi, N., (1991) Wood and Cellulosic Chemistry, pp. 331-392. , Marcel Dekker New YorkScarminio, I.S., Bruns, R.E., (1989) Trends Anal. Chem., 8, pp. 326-327Biermann, C.J., (2007) Handbook of Pulping and Papermaking, , 2nd ed. Academic Press San DiegoMoriya, R.T., Gonçalves, A., Duarte, M.C.T., (2005) Appl. Biochem. 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Use Of Bacillus Pumilus Cbmai 0008 And Paenibacillus Sp. Cbmai 868 For Colour Removal From Paper Mill Effluent [emprego De Bacillus Pumilus Cbmai 0008 E Paenibacillus Sp. Cbmai 868 Para Remoção Da Cor Do Efluente Da Indústria Papeleira]
No full textBacillus pumilus and Paenibacillus sp. were applied on the paper mill effluent to investigate the colour remotion. Inocula were individually applied in effluent at pH 7.0, 9.0 and 11.0. The real colour and COD remotion after 48h at pH 9.0 were, respectively, 41.87% and 22.08% for B. pumilus treatment and 42.30% and 22.89% for Paenibacillus sp. Gel permeation chromatography was used to verify the molar masses of compounds in the non-treated and treated effluent, showing a decrease in the compounds responsible for the paper mill effluent colour.402354357Duarte, M.C.T., Portugal, E.P., Ponezi, A.N., Bim, M.A., Tagliari, C.V., Franco, T.T., Production and purification of alkaline xylanases (1999) Biores. Technol., 68, pp. 49-53Duarte, M.C.T., Pellegrino, A.C.A., Ponezi, A.N., Portugal, E.P., Franco, T.T., Characterization of alkaline xylanases from Bacillus pumilus (2000) Braz. J. Microbiol., 31, pp. 90-94Duarte, M.C.T., Silva, E.C., Gomes, I.M.B., Ponezi, A.N., Vicente, J.R., Davanzo, E., Xylan-hydrolyzing enzyme system from Bacillus pumilus CBMAI 0008 and its effects on Eucalyptus grandis kraft pulp for pulp bleaching improvement (2003) Bioresour. Technol., 88, pp. 9-15Joyce, T.W., Chang, H.-M., Campbell, A.G., Gerrard, E.D., Kirk, T.K., A continuous biological process to decolorize bleach plant effluents (1984) Biotechnol. Adv., 2, pp. 301-308Kringstad, K.P., Lindstrom, K., Spent liquors from pulp bleaching (1984) Environ. Sci. Technol., 18, pp. 236-248Mandels, N., Stenberg, D., Recent advances in cellulase technology (1976) J. Fermentation Technol., 54, pp. 267-286Manzanares, P., Fajardo, S., Martín, C., Production of ligninolytic activities when treating paper pulp effluents by Trametes versicolor (1995) J. Biotechnol., 43, pp. 125-132Moriya, R.Y., Gonçalves, A.R., Duarte, M.C.T., Sugarcane bagasse pulps - Biobleaching with commercial catarzyme HS and with Bacillus pumilus xylanase (2005) Appl. Biochem. Biotechnol., 121, pp. 171-181Nagarathnamma, R., Bajpai, P., Bajpai, P.K., Studies on decolourization, degradation and detoxification of chlorinated lignin compounds in kraft bleaching effluents by Ceriporiopsis subvermispora (1999) Proc. Biochem., 34, pp. 939-948Oliveira, P.L., (2008) Purificação e caracterização bioquímica de manganês peroxidase de Bacillus pumilus e Paenibacillus sp. e sua atuação na remoção da cor do efluente da indústria papeleira, p. 69. , São Paulo, Brasil, M.Sc. Dissertation, Faculdade de Engenharia de Alimentos. UnicampRagunathan, R., Swaminathan, K., Biological treatment of a pulp and paper industry effluent by Pleorotus spp (2004) World J. Microbiol. Biotechnol., 20 (4), pp. 389-393Sahoo, D., Gupta, R., Evaluation of ligninolytic microorganisms for efficient decolorization of a small pulp and paper mill effluent (2005) Process Biochem., 40, pp. 1573-1578Selvam, K., Swaminathan, K., Hoon Song, M., Snag Chae, K., Biological treatment of pulp and paper industry effluent by Fomes lividus e Trametes versicolor (2002) World J. Microbiol. Biotechnol., 18, pp. 523-526Singh, P., Sequential anaerobic and aerobic treatment of pulp and paper mill effluent in pilot scale bioreactor (2007) J. Env. Biol., 28, pp. 77-82Singh, P., Thakur, I.S., Colour removal of anaerobically treated pulp and paper mill effluent by microorganisms in two steps bioreactor (2006) Biores. Technol., 97, pp. 218-223(2005) For Examination of Water e Wastewater, , Standard Methods, Centennial Edition, 21st EdVenkataraman, T.S., Pollution abatement for small paper mills - problems and prospects (1990) Chem. Wkly., 9, pp. 89-9
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
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
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