1,720,961 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
Design of Experimental Setup for Hydrodynamic Thin Film Pressure Study
No full textA proposed experimental setup for study and demonstration of the pressure distribution and load capacity of hydrodynamic bearings was developed. Various conceptual designs for producing thin full film lubrication conditions and enabling gap geometry control and pressure and force measurements were produced and assessed. Relative motion for the interacting bearing surfaces was found promising to be achieved by a smooth rotating belt. A simple height control arrangement for the stationary surface is also found to be facilitating the gap control between the two surfaces. Alternative direct and indirect techniques for measuring pressure and force were pointed out. Topology and dimensions of the proposed design were suggested as a basis for a physical setup realization.A great deal of research work is being carried out on hydrdynamic bearings to improve their frictional eficeincy. All the research work that has been carried out is on the hydrodynamic bearings, which is prone to various nolinearities. The thesis is a venture to genrate a simple experimental setup that may help to conduct the experimentation in simple and precise manner.C/O Gaurav Bhupati, Minervagen 20.¨, Karlskrona, -Sweden. Postal Code: 3714
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Técnicas ecológicas de control de malezas (extracto alelopático) en el cultivo de trigo
No full textGenerally herbicides (pesticides) have the potential to pollute the environment. Ground water, ponds, lakes and rivers are strongly affected by herbicide pollution. The herbicides that find their way into rivers, streams and lakes end up poisoning the marine life and have an adverse effect on the fishing industry. So in field studies, the phytotoxic effects of organic weed extracts were determined on the weeds and wheat crop. Ethanol or CHCl3 (trichloromethane or chloroform) extracts of toothpick weed (Ammi visnaga L.) and field bindweed (Convolvulus arvensis L.) were applied at 1 000 and 500 ppm. One month after wheat sowing. The CHCl3 extract of field bindweed at 1 000 ppm and toothpick weed at 500 ppm drastically reduced the weeds population (33.67 weeds m-2 each than 101 m-2 in untreated control) but increased the wheat grain yield. The CHCl3 extract of bindweed applied at 500 ppm gave maximum wheat yield (1.2 t ha-1), while toothpick weed extract in the same solvent and applied at 1 000 ppm gave wheat yield of 1.1 t ha-1. Judicious control measures for noxious weeds of allelopathic extracts are recommended to be adopted for harvesting better quantity and quality of wheat and also avoid the air pollution as well.Generalmente, los herbicidas (pesticidas) tienen el potencial de contaminar el medio ambiente. Agua subterránea, estanques, lagos y ríos se ven fuertemente afectados por la contaminación de éstos. Los herbicidas que encuentran su camino en los ríos, arroyos y lagos acabar envenenando la vida marina y tener un efecto adverso en la industria pesquera. Así que, en los estudios de campo, los efectos fitotóxicos de extractos orgánicos de malezas se determinaron en las malezas y cosecha de trigo. El etanol CHCl3 (triclorometano o cloroformo) o extractos de algas palillo de dientes (Ammi visnaga L.) y la enredadera de campo (Convolvulus arvensis L.) se aplicaron en 1 000 y 500 ppm. Un mes después de la siembra de trigo, el extracto de CHCl3 de correhuela a 1 000 ppm y malezas palillo de dientes a 500 ppm, reducido drásticamente la población de malezas (33,67 malezas m-2 cada uno de 101 m-2 en el control sin tratar), pero aumentó el rendimiento de grano de trigo. El extracto CHCl3 de enredadera, aplicada a 500 ppm, dio un rendimiento del trigo máximo (1.2 t ha-1), mientras que el extracto de malezas palillo de dientes en el mismo disolvente y se aplica a1 000 ppm dio el rendimiento de trigo de 1,1 t ha-1. Se recomiendan medidas de control juiciosas para malas hierbas nocivas de extractos alelopáticos que se adopte para la cosecha de mejor calidad y cantidad de trigo y también evitar la contaminación del aire
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