1,721,004 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
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
Design and simulations of a phased array feed for the biralet radar
No full textThe number of space debris in orbit around the Earth is continuously growing and represents a potential problem for the development and growth of the Space Economy. For this reason, there are worldwide many different programs aiming at monitoring and mitigating the proliferation of space debris. For this purpose, a Space Surveillance and Tracking (SST) Support Framework was established by the European Commission in 2014 and a SST Consortium of five EU Member States (France, Germany, Italy, Spain and UK) was formed in 2015. INAF (Italian National Institute for Astrophysics) participates to the EUSST Consortium by offering different sensors and capabilities, including optical and radio telescopes. One of the tracking radars we are proposing in the framework of the EUSST is the so-called BIRALET, a bi-static radar composed by a transmitting antenna and by the SRT (Sardinia Radio Telescope) as a receiver. The transmitting antenna is a parabolic dish with a diameter of 7 m managed by the Italian Air Force, whereas the SRT is a fully steerable wheel-and-track 64 m dish radio telescope, with a Gregorian optical configuration, managed by INAF. Both sensors are located in Sardinia, Italy, with a baseline of about 20 km. BIRALET is a Doppler radar, which transmits a CW (Continuous Wave) signal with a maximum power of 10 kW in P-band at 410 MHz and receives the echo radar with a cryogenically cooled P-band single beam receiver installed on the primary focus of its receiver system, the SRT. The BIRALET system can generate a set of data for every observed space debris (both beam-parking and tracking mode), i.e. Doppler shift, pointing coordinates and measured power intensity. One of the limitations, for particular observation scenarios, of the current BIRALET system is the relatively low pointing speed of SRT and the availability of only one beam, resulting in a limited Field of View. (FoV). In this paper, the authors present a study for the upgrade of the BIRALET, based on the development of a new receiver for the SRT, a C-band Phased Array Feed, which can guarantee some improvements respect to the original system, like sensitivity, antenna gain, and the tracking of the observed object, allowed by the multiple beams with a consequent improvement of the orbit determination of known and unknown debris
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
A new biometric tool for three-dimensional subcutaneous tumor scanning in mice.
No full textAIM:
To propose an innovative methodology for the monitoring of the evolution of induced subcutaneous tumors in mice.
MATERIALS AND METHODS:
A new 3D scanner able to measure the tumor mass volume is presented. The scanner is based on the projection of a fringe pattern onto the sample surface (structured light). The lines are diffused by the sample and then collected by a digital camera. The obtained 2D-image is treated by the scanner's software that extracts the 3D information and evaluates the sample volume.
RESULTS:
The 3D scanner has been successfully used in the measurement of subcutaneous HT-29 colorectal cancer xenografts treated with 5-fluorouracil, bevacizumab and their combination. Comparison with simple caliper measurements revealed important and significant differences between the two measurement techniques.
CONCLUSION:
The proposed methodology is more effective than the usual approach based on caliper measurements
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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