1,721,049 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
Innovazione e dimensione di impresa. Nuove evidenze a favore dell’ipotesi neo-schumpeteriana
No full textIn questo saggio si forniscono, sulla base dei dati dell'indagine Istat sull'innovazione tecnologica, nuove evidenze empiriche a sostegno della prima delle ipotesi schumpeteriane (effetto positivo della dimensione d'impresa sull'innovazione
The effect of milk and sucrose consumption on caries in 6-to-11-year-old Italian schoolchildren
No full textLa definizione e misurazione delle innovazioni di prodotto e processo
No full textIn questo lavoro si analizza la distinzione tra innovazione di prodotto e processo da un punto di vista concettuale e definitorio e con l'ausilio di alcune evidenze empiriche a livello di impres
Concentration, firm size, and innovation. Evidence from innovation costs
No full textBy means of a new technological indicator, i.e. original data on firms' innovation costs (survey CNR-1STAT), the neo-Schumpeterian hypothesis on the positive association between innovative intensity, concentration and firm-size has been tested at the aggregate and at the sectoral level for the Italian manufacturing industry. The advantage of the evidence presented here lies mainly in the comprehensive nature of the indicator used. The data on innovation costs
include, in addition to R&D, other relevant innovative sources such as those related to production investment, marketing, design and engineering. This new indicator shows that innovative intensity increases with firm size in sectors with high technological opportunities
Experimental and analytical study of an innovative integrated dual-source evaporator for solar-assisted heat pumps
Full text linkEnergy efficiency is an effective way to produce energy reducing the impact of fossil fuels in the energy sector. A promising solution for residential application consists of producing domestic hot water and space heating using Solar-Assisted Heat Pump. This work analyzes the performance of a Solar-Assisted Heat Pump with an innovative Integrated Dual-Source Evaporator connected to Photovoltaic/Thermal modules. The concept is firstly validated in laboratory where the Solar-Assisted Heat Pump is operated in real environmental conditions. Then, a numerical model is developed in Matlab® to identify the optimal design of the Integrated Dual-Source Evaporator. Numerical results show that the performance of the system are significantly affected by the solar irradiance and in a wide operating range the photovoltaic production overcomes the Heat Pump consumptions. Compared to a standard Air-Source Heat Pump, the proposed concept shows up to 14% higher Coefficient of Performanc
A macroeconometric model for the analysis of the impact of technological change and trade on employment
No full textThis article, which is a key part of the policy analysis carried out in the Eu funded AITEG project, studies the impact of changes in technology and globalisation on the whole economy by looking explicitly at the indirect effect (i.e, beyond industries) of new technology in the economy through the analysis of compensation mechanisms. The paper introduces the theoretical foundations and the structure of a macroeconometric model for the analysis of compensation mechanisms that influence the overall impact of the introduction of new technology on employment. After a brief explanation of the main relationships between technological change and employment, the general structure of the model is outlined. The formal model illustrates a possible way of approaching, from a macroeconomic perspective, the analysis of the complex relationships between technological change, trade, growth and employment dynamics. The aim of the analysis is to highlight the relevance of some aspects that in the past have only received minor treatment in mainstream contributions to the issue. In particular, the strong dependence of the results on distribution and demand is recognized. The model proposed is the extended version of a macroeconomic model previously presented by Vivarelli in 1995. The modifications introduced in the original model have both theoretical and technical relevance. Some results from an application to Italy and the United Kingdom follow a brief discussion of the techniques adopted for the econometric estimation
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
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