1,783,150 research outputs found
1931 Travel Air 4000 which was part of the Parks fleet, used for radio, instrument and night flying
No full textThis 1931 Travel Air 4000 was part of the Parks fleet, used for radio, instrument and night flying. The lightning bolt insignia on the fuselage indicates that this ship is equipped for those purposes. It had a Wright 220 hp engine. The plane was in the Parks inventory from 1933 to 1940. (1930s) [Photo from the Collection of James H. Harvey, via Fred Roos.
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
Il mondo prima della storia. Dagli inizi al 4000 a.C. (edizione italiana a cura di T. Pievani)
No full textCuratela dell'edizione italiana del libro di Ian Tattersall "Il mondo prima della storia. Dagli inizi al 4000 a.C.
SR-4000 and CamCube3.0 Time of Flight (ToF) Cameras: Tests and Comparison
No full textIn this paper experimental comparisons between two Time-of-Flight (ToF) cameras are reported in order to test their performance and to give some procedures for testing data delivered by this kind of technology. In particular, the SR-4000 camera by Mesa Imaging AG and the CamCube3.0 by PMD Technologies have been evaluated since they have good performances and are well known to researchers dealing with Time-of- Flight (ToF) cameras. After a brief overview of commercial ToF cameras available on the market and the main specifications of the tested devices, two topics are presented in this paper. First, the influence of camera warm-up on distance measurement is analyzed: a warm-up of 40 minutes is suggested to obtain the measurement stability, especially in the case of the CamCube3.0 camera, that exhibits distance measurement variations of several centimeters. Secondly, the variation of distance measurement precision variation over integration time is presented: distance measurement precisions of some millimeters are obtained in both cases. Finally, a comparison between the two cameras based on the experiments and some information about future work on evaluation of sunlight influence on distance measurements are reporte
Claas Xerion 4000 y olvídate de la roca madre
No full textEsta es una prueba de campo particular, en la que se ha utilizado un tractor Claas Xerion 4000 (419 CV) para la preparación del terreno para acondicionarlo a la labor agrícola: el tradicional subsolado, pre-molado y molado. Una labor que justifica el uso de un tractor de tan elevada potencia, para lo que los representantes de Claas se pusieron en contacto con la empresa familiar Stone Crusher localizada en Soria, la cual emplea máquinas y aperos específicos de origen austriaco de gran robustez
Variations on the Author
No full text“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
No full textWe 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
4000 Disparos = 4000 Shots
No full text" Book with stills of the video "4000 disparos", with introduction by Kiki Mazzucchelli and an interview with psychoanalyst and curator Suely Rolnik. 2011 " -- Artist's website
Dispelling the Myths Behind First-author Citation Counts
No full textWe 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
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