1,725,937 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
Begonnen mit Zug.-Nr.: N 8500 : Abgeschl. mit Zug.-Nr.: N 11058
Get PDFBEGONNEN MIT ZUG.-NR.: N 8500 : ABGESCHL. MIT ZUG.-NR.: N 11058
Zugangsbuch N (-)
Begonnen mit Zug.-Nr.: N 8500 : Abgeschl. mit Zug.-Nr.: N 11058 (IV) ( - )
Cover ( - )
N 8500 bis N 8999 (2)
N 9000 bis N 9999 (21)
N 10000 bis N 10999 (55)
N 11000 bis N 11058 (92
Análisis comparativo del concreto f'c 210kg/ cm2 con aditivo Ecoandina Y Neoplast 8500 HP, Pucallpa, 2022
Get PDFEl objetivo de la investigación es determinar cuál es el análisis comparativo del
concreto FC 210KG/ CM2 con aditivo Ecoandina Y Neoplast 8500 HP Pucallpa,
2022.
La metodología es aplicada, diseño descriptivo, enfoque cuantitativo. La población
para el caso de estudio serán las probetas de concreto con con aditivo Ecoandina
Y Neoplast 8500 HP Pucallpa, 2022. La muestra serán las probetas de concreto
con con aditivo Ecoandina Y Neoplast 8500 HP Pucallpa, 2022.
Las conclusiones muestran que el análisis comparativo del concreto FC 210KG/
CM2 con aditivo Ecoandina Y Neoplast 8500 HP Pucallpa, 2022, refleja que existe
variaciones sustanciales
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
Low Reynolds Number Effects on Jets from Round, Square and Elliptical Orifices
No full textAn experimental study was undertaken to investigate low Reynolds number effects on mixing characteristics and turbulent transport phenomena in the near and intermediate regions of free orifice jets. The cross-sections examined were round, square and ellipse of aspect ratio 3. For each orifice cross-section, detailed velocity measurements were obtained at the following 4 Reynolds number based on the equivalent diameter and maximum velocity: 2500, 4300, 8500 and 17000. A high resolution particle image velocimetry was used to conduct measurements in the symmetry planes that extend from the exit to 15 equivalent diameters. Preliminary results show that an axis-switching happens at 2.7 equivalent diameters in the case of ellipse nozzle which leads to a higher spread rate compared to square and round ones. Also increase in Reynolds number decreases the jet widths
Study of H-8500 MaPMT for the FDIRC detector at superB
No full textInternational audienceAn overview of ongoing studies on the Hamamatsu H-8500 Multi-Anode Photomultiplier (MaPMT) is presented. This device will be used for the FDIRC Particle Identification Detector (PID) of the SuperB experiment. The H-8500 MaPMT has been chosen for its excellent single photon timing capabilities and its highly pixilated design. Results on timing studies, gain uniformity, single photoelectron detection efficiency uniformity and cross-talk are presented
- …
