1,721,393 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
Marketing relazionale, certificazione Iso 9000 e qualità totale nell'industria alimentare
No full textVariations 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
Parametric investigation on the response of suspended piping systems to tri-directional seismic excitation
No full textThe evaluation of the seismic performance of piping networks is often difficult due to several parameters involved in the process, such as complex geometry, modelling uncertainties and earthquake properties. Despite several studies have been conducted on this topic, driven by the importance of piping networks from a building serviceability standpoint, generalized guidelines to achieve defined performance criteria are still difficult to develop. The hardships in analysing the seismic response of piping networks are mainly due to their peculiar configuration, which leads to interaction between local vibration modes and the seismic acceleration. Additional issues are also caused by great variability in piping systems' design and quality. The scope of this study is to investigate several aspects of the dynamic response of different types of piping networks, considering tridirectional floor seismic input. A numerical model was developed, accounting for the non-linear behaviour of piping restraint installations and pipe joints. The numerical model was used to perform nonlinear time-history analyses aimed at assessing the seismic vulnerability in a performance-based design framework. The influence of the geometric configuration and the mass of the system was investigated by analysing the accelerations and displacements, alongside damage on pipe joints and suspended piping restraints due to earthquake. Additionally, the response obtained considering and neglecting the vertical component of the floor acceleration were compared. The results of the analysis were employed to compute fragility functions at different limit states, considering the parameters investigated. A clear influence of the geometry and the mass of the system on the seismic vulnerability is observed, while the effects of the vertical acceleration seem to be generally negligible
The Poisson Problem: a Comparison between Two Approaches Based on SPH Method
No full textIn this paper two approaches to solve the Poisson problem are presented and compared. The computational schemes are based on Smoothed Particle Hydrodynamics method which is able to perform an integral representation by means of a smoothing kernel func- tion by involving domain particles in the discrete formulation.
The first approach is derived by means of the variational formulation of the Poisson prob- lem, while the second one is a direct differential method.
Numerical examples on different domain geometries are implemented to verify and compare the proposed approaches; the computational efficiency of the developed methods is also studied
Magnetic attachments for implants in complete dentures Attacchi magnetici su impianti in protesi totale.
No full textAbstract
In this research work we examine and apply to patients new types of technologies, describing advantages and disadvantages of using them. This osseointegrated implantation with magnetic prosthetic connection, allow to stabilize complete denture in patients suffering from serious atrophy
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