1,721,083 research outputs found
PC-based system for handwritten characters recognition with multilayer perceptrons
No full textIn this paper we will describe a real-time handwritten characters recognizer based on Multilayer Perceprons with back error propagation learning algorithm. The system has been implemented on a Personal Computer. The necessity of evaluating the performance of neural networks for handwritten characters recognition in real environment brought us to the implementation of a complete system available for end users. This approach foorces to consider the variables and uncertainties not foreseen in simulation phase: the final performance will take into account the recognition efficiency, the adaptation capability to different applications and the facilities provided for user friendly operations. The nentwork design has been made with the aid with a recently published theorem that estabilishes a relation between the number of regions separable by the network and the number of hidden units. The recognition accuracy, obtained by testing the system with a data-base of digits handwritten by six people,was 80%. Experimental resulta are reported in terms of recognition accuraracy and speed of convergence of the learning phase in the diffe3rent examinated conditions. Finally, the effiecient implementation of the system (computational time very close to real-time on a PC AT compatible) opens to practical applications in the area of improved man-machine communication; this aspect will be briefly explored in the paper
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
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
Zeolitic Inorganic-Organic Polymer Electrolytes: A Material Based on Poly(ethylene glycol) 600, SnCl4 and K4Fe(CN)6
No full textThis report describes the synthesis of a new zeolitic inorganic-organic polymer electrolyte with the formula [FexSny(CN)zCl-v(C2nH4n+2On+1)K-1] based on poly(ethylene glycol) 600, SnCl4 and K-4[Fe(CN)6], and is obtained via a sol-->gel transition. Mid and far Fourie than form infrared (FT-IX) studies, analytical data and X-ray Photoelectron spectroscopy (XPS) investigations allowed us to conclude that this material is a mixed inorganic-organic network in which Fr and Sn are bonded by CN bridges and tin atoms by PEG 600 bridges. Mid-infrared (MIR) FT-IR investigations demonstrated that the polyether chains assume a conformation of the TGT (T = trans, G = gauche) type.
Micrographs of the compound obtained by scanning electron microscopy reveal that ifs morphology resembles a smooth gummy paste. The conductivity of the material at different temperatures was determined by impedance spectroscopy (IS). Results indicated that the material conducts ionically and that its conductivity is strongly influenced by segmental motion of the polymer network Finally, this network shows a conductivity of ca. 3.7 x 10-5 S/cm at 25°C
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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