1,720,957 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
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
Surface photometry of cD envelopes
No full textWe have carried out deep BVR surface photometry of 6 cD and cD-like galaxies using the 2.1-m telescope at San Pedro Mrtir, cD galaxies are supergiant galaxies (M>1013M) with enormous halos (>100 kpc in radius) surrounding a giant elliptical galaxy, found generally at the centre of rich clusters (Oemler 1976, Schombert 1988). The surface brightness profiles of their halos (envelopes) break from the r1/4 law, containing more light at large radii (Schombert (1988)), although a detailed 1 and 2 dimensional analysis of their morphology has yet to be carried out. There have been four main theories as to the origin of cD envelopes (Schombert (1988) and references within), a) stripping of stars from other cluster member galaxies, b) formation of galaxy and envelope at the same time during the formation of the cluster, c) mergers of cluster members, which do not easily explain the high velocity dispersions in the envelopes (∼ 1000 km s1), d) cooling flows: accumulation of cooling X-ray-emitting ICM gas around the central galaxy. Very red envelopes have been found around some cD's, and star formation biased towards lowmass stars in cooling flows were invoked to explain these red halos, but the expected very bright near-IR halos were not detected (Joy et al. 1995 and references within). Previous detailed studies of cD galaxies (e.g. Mackie 1992) found a range of colour gradients. © 2007 International Astronomical Union
Sustainable micro-business in environmental unsustainability and economic inefficiency
No full textWe have carried out deep BVR surface photometry of 6 cD and cD-like galaxies using the 2.1-m telescope at San Pedro Mrtir, cD galaxies are supergiant galaxies (M>1013M) with enormous halos (>100 kpc in radius) surrounding a giant elliptical galaxy, found generally at the centre of rich clusters (Oemler 1976, Schombert 1988). The surface brightness profiles of their halos (envelopes) break from the r1/4 law, containing more light at large radii (Schombert (1988)), although a detailed 1 and 2 dimensional analysis of their morphology has yet to be carried out. There have been four main theories as to the origin of cD envelopes (Schombert (1988) and references within), a) stripping of stars from other cluster member galaxies, b) formation of galaxy and envelope at the same time during the formation of the cluster, c) mergers of cluster members, which do not easily explain the high velocity dispersions in the envelopes (? 1000 km s1), d) cooling flows: accumulation of cooling X-ray-emitting ICM gas around the central galaxy. Very red envelopes have been found around some cD's, and star formation biased towards lowmass stars in cooling flows were invoked to explain these red halos, but the expected very bright near-IR halos were not detected (Joy et al. 1995 and references within). Previous detailed studies of cD galaxies (e.g. Mackie 1992) found a range of colour gradients. " 2007 International Astronomical Union.",,,,,,"10.1017/S1743921306006193",,,"http://hdl.handle.net/20.500.12104/44863","http://www.scopus.com/inward/record.url?eid=2-s2.0-36949030262&partnerID=40&md5=4295b1af0f1ef1213ea501263a036f0e",,,,,,"S235",,"Proceedings of the International Astronomical Union",,"213",,"2",,"Scopus",,,,,,,,,,,,"Surface photometry of cD envelopes",,"Conference Paper"
"46648","123456789/35008",,"Lavalle, F., Hospital Universitario Dr. José E. González, Mexico; García, P.; Castañeda, R.; Escalante, C.; Rosas, J.; García Alcalá, H., UPAEP, Puebla, Mexico; Stempa Blumenfeld, O., División de Endocrinología, Centro Médico ABC, Mexico; Reynoso Mendoza, R., Clínica de Obesidad, Centro Nacional de Nutrición, Mexico; Sánchez A, L.F., Clínica de Tiroides, Diabetes y Enfermedades Glandulares, Mexico; Real, R., Departamento de Endocrino, Clínica de Diabetes, Hospital General Matamoros, Tams, Mexico; Meza Bernardino, H., Hospital Ángeles Puebla, Mexico; Beltrán Adame, M., Sociedad de Médicos Fundadores del Hospital 20 de Noviembre, Mexico; Herrera Madrigal, C., Servicio de Endocrinología, Hospital Central Sur de Alta Especialidad, PEMEX, México, DF, Mexico; Villagordoa Mesa, J., UNAM, Mexico; Garza Tamez, E., Universidad de Nuevo León, Mexico; Sauque Reyna, L., Clínica de Diabetes, Hospital General de Cuernavaca, Mexico; Palafox Castelán, G., Hospital Ángeles Metropolitano, Mexico; Castro Martínez, Ma.G., Departamento de Medicina Interna, Hospital Regional Número 1 Gabriel Mancera, Mexico; Ríos González, J.D.J., División de Investigación y Educación Médica, Hospital de Especialidades de Occidente, Mexico; Agustín Madero, M., Hospital de Especialidades Número 71, IMSS, Mexico; Escalante Herrera, A., CUCS, Universidad de Guadalajara, Mexico; Puebla Peralta, R.A., Centro Médico del Noroeste, Hermosillo, Son, Mexico; Rodríguez Torres, L.G., Hospital Star Médica, Aguascalientes, Mexico; Javier Serrano, F., Servicio de Angiología y Cirugía Vascular, Hospital Clúnico San Carlos, Mexico; Correa Flores, A., Clínica de Diabetes Mellitus Tipo 2, Hospital la Raza, IMSS, Mexico; Martínez Delgado, I., Sociedad Mexicana de Nutrición y Endocrinología, Mexico; Manuel Michel, V.; Sienra Pérez, J.C.; Yépez Rodríguez, A., Asociación Médica, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Mexico; López Ponce, A., Fundación Médica Sur, Mexico, Universidad la Salle, Mexico; Solís Durán, O.; Valdez González, A.L., Hospital General de Zona 194, IMSS, Mexico; Montiel Falcón, H., División de Urgencias, Centro Médico ABC, Campus Santa Fe, Mexico; León Zárate, H.A., Hospital Ángeles de Tijuana, Mexico; Miracle López, S., Hospital Ángeles Lomas, Mexico; Salas Flores, R., Hospital CEMAIN, Tampico, Tams, Mexico; González Gálvez, G., Hospital Civil de Guadalajara, Mexico; Hernández Petriz, J.L., Clínica de Síndrome Metabólico, Tuxtla Gutiérrez, Chis, Mexico; González Ortiz, M., Sistema Nacional de Investigadores, Mexico; Sosa Caballero, A., Hospital de Especialidades, Centro Médico Nacional la Raza, IMSS, Mexico; Rojas Jiménez, J.A., Clínica de Diabetes de la Beneficencia, Hospital ABC, Campus Santa Fe, Mexico; Ortega González, C., Instituto Nacional de Perinatología, Mexico; Barrientos Pérez, M., Hospital para el Niño Poblano-Hospital Ángeles, Puebla, Mexico; Vidrio Velázquez, M.; Rodríguez Sánchez, E., Hospital de Alta Especialidad Dr. Gustavo A. Rovirosa Pérez, Mexico; Carrillo González, P.; Faradji Hazan, R.N.; Mejía Solís, L.I., Hospital General de Zona Número 8, Mexico; Mauricio Leguizamo, G., Instituto de Diabetología, Guadalajara, Jal, Mexico; Godínez Gutiérrez, S., Servicio de Endocrinología, Hospital Civil de Guadalajara Fray Antonio Alcalde, Mexico; Pérez Sánchez, P.L.; Rodríguez Moctezuma, J., Delegación Regional del Estado de México Oriente, IMSS, Mexico",,"Lavalle, F
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
Lenticular galaxies in the process of evolution
No full textWe present images of a number of lenticular galaxies which appear to be undergoing evolutionary processes such as ram-pressure stripping or gravitational interactions, or possess features indicative of some evolutionary process in the recent past, such as fossil spiral arms, a polar ring-like structure, or a warped disk with box-peanut bulge. All the galaxies were originally identified on digitally co-added photographic plates or films from the UK Schmidt Telescope, showing that such material is still useful in spite of the modern digital surveys available. In some cases CCD follow up is presented. � 2008 Copyright International Astronomical Union 2008
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
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