1,721,000 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
INFLUENCE OF THE INDUCTION HEATING PROCESS ON A NANO-MODIFIED ADHESIVE FOR AUTOMOTIVE APPLICATIONS
No full textThe motivations of this study are due to the lack of information on this topic and to the different sensitivity and behaviour of the nano-particles compared to metal workpieces. While induction heating coupled with metal component has been widely studied, the induction heating process coupled with nanoparticle embedded in the adhesive is at an early stage. This latter process is based on properly shaped inductor coils and properly set electromagnetic field control unit. In this paper, the sensitivity to some process parameters, in the case of the magnetite nanoparticles dispersed in the HMA, has been studied. The parameters analysed in this experimental activity are: the shape of the coil, diameter of the pipe coil, frequency of the inductor and induced current of the inductor. The parameter used to measure this sensitivity is the time needed to separate a single lap joint specimen (SLJ)
Effect Of Accelerated Ageing Cycles On The Physical And Mechanical Properties Of A Reversible Thermoplastic Adhesive
Get PDFA STUDY OF PHYSICAL AND MECHANICAL PROPERTIES OF A NANOMODIFIED THERMOPLASTIC ADHESIVE IN NORMAL AND ACCELERATED AGEING CONDITIONS
No full textBonding is one of the key aspects of recent vehicle design, especially when multi-material structures are considered to contribute to the lightweight trend. Some innovative technologies, based on magneto sensitive nanoparticles dispersed in hot melt adhesive (HMA), have been already studied in order to reduce the cycle time of a vehicle and to allow for the recycling at the vehicle end of life. In this research activity, the effect of a 180 days normal ageing and three different accelerated ageing cycles (currently used by vehicle industries) of a thermoplastic adhesive with Iron (II,III) oxide nanoparticles embedded in the adhesive matrix have been studied. Performed Single Lap Joint (SLJ) tests prove the variations of the mechanical properties and adhesion strength during both the normal and accelerated ageings. Thermogravimetric analysis (TGA) and Fourier Transform Infrared Spectroscopy (FTIR) have been used to reveal the different degradation levels among the various ageing cycles. Results have been conveniently compared and criticized in order to show the differences and the similarities between the normal ageing cycle and accelerated ones
Thermomechanical characterization of reinforced and dismountable thermoplastic adhesive joints activated by microwave and induction processes
Get PDFEffect of iron oxide and graphene particles on joint strength and dismounting characteristics of a thermoplastic adhesive
No full textVariations 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
- …
