Thermographic analysis of bronze sculptures     

Noemi Orazi  Fulvio Mercuri  Ugo Zammit  Stefano Paoloni  Massimo Marinelli  Augusto Giuffredi 《文物保护研究》2016,61(4):236-244

In this work we investigate various aspects of the finishing process in ancient bronze sculptures by means of active infrared thermography (IRT). Active IRT provides information on surface and sub-surface features of the investigated artefact, by analysing the heat diffusion process induced within the sample by appropriate thermal stimulations usually produced by absorption of light emitted by different sources. The aim of this research is, in particular, to investigate the processing of bronze surfaces, revealing repairs like plugs, fillings, local castings and concealed marks.  相似文献   

Knowledge-relatedness in firm technological diversification   总被引：4，自引：0，他引：4  

Stefano BreschiFrancesco Lissoni  Franco Malerba 《Research Policy》2003,32(1):69-87

This paper claims that knowledge-relatedness is a key factor in affecting firms’ technological diversification. The hypothesis is tested that firms extend the range of their innovative activities in a non-random way. Specifically, we test the extent to which firms diversify their innovative activities across related technological fields, i.e. fields that share a common knowledge base and rely upon common heuristics and scientific principles. The paper proposes an original measure of knowledge-relatedness, using co-classification codes contained in patent documents, and examines the patterns of technological diversification of the whole population of firms from the United States, Italy, France, UK, Germany, and Japan patenting to the European Patent Office from 1982 to 1993. Robust evidence is found that knowledge-relatedness is a major feature of firms’ innovative activities.  相似文献   

The demand for live performing arts in Italy   总被引：1，自引：1，他引：0  

Leo Bonato  Francesco Gagliardi  Stefano Gorelli 《Journal of Cultural Economics》1990,14(2):41-52

  相似文献   

Student perceptions of interpersonal justice,engagement, agency and anger: a longitudinal study for reciprocal effects     

Mameli  Consuelo  Grazia  Valentina  Passini  Stefano  Molinari  Luisa 《European Journal of Psychology of Education - EJPE》2022,37(3):765-784

Based on the premise that classroom interactions unfold through a complex series of circular influences between teacher and students, the aim of this longitudinal study was to test a reciprocal effects model connecting students’ perceptions of interpersonal justice, on the one hand, and student engagement, agency and anger, on the other. Self-report measures of interpersonal justice, student engagement, agency and anger were collected from 454 Year Nine students from Northern Italy in a 3-wave longitudinal research design. Structural equation modelling with latent variables indicated that interpersonal justice in wave 1 had a negative effect on both student agency and anger in wave 2, while interpersonal justice in wave 2 only negatively predicted student anger in wave 3. With respect to the reciprocal effects, student engagement in wave 2 was found to positively predict interpersonal justice in wave 3, while a negative effect close to statistical significance was observed from student agency in wave 2 to interpersonal justice in wave 3. These results are discussed in terms of their implications for teacher practice, as they emphasize that (a) the two main facets of student participation, namely engagement and agency, are differently interconnected with the learning environment, and (b) the perception of being treated fairly is important to the point that its deficiency triggers a persistent feeling of anger in students.

  相似文献   

Red blood cell dynamics in polymer brush-coated microcapillaries: A model of endothelial glycocalyx in vitro     

Luca Lanotte  Giovanna Tomaiuolo  Chaouqi Misbah  Lionel Bureau  Stefano Guido 《Biomicrofluidics》2014,8(1)

The confined flow of red blood cells (RBCs) in microvasculature is essential for oxygen delivery to body tissues and has been extensively investigated in the literature, both in vivo and in vitro. One of the main problems still open in microcirculation is that flow resistance in microcapillaries in vivo is higher than that in vitro. This discrepancy has been attributed to the glycocalyx, a macromolecular layer lining the inner walls of vessels in vivo, but no direct experimental evidence of this hypothesis has been provided so far. Here, we investigate the flow behavior of RBCs in glass microcapillaries coated with a polymer brush (referred to as “hairy” microcapillaries as opposed to “bare” ones with no coating), an experimental model system of the glycocalyx. By high-speed microscopy imaging and image analysis, a velocity reduction of RBCs flowing in hairy microcapillaries as compared to bare ones is indeed found at the same pressure drop. Interestingly, such slowing down is larger than expected from lumen reduction due to the polymer brush and displays an on-off trend with a threshold around 70 nm of polymer brush dry thickness. Above this threshold, the presence of the polymer brush is associated with an increased RBC deformation, and RBC velocity is independent on polymer brush thickness (at the same pressure drop). In conclusion, this work provides direct support to the hypothesis that the glycocalyx is the main factor responsible of the higher flow resistance found in microcapillaries in vivo.  相似文献   

Effects of the financial crisis on university choice by gender     

Mattia Cattaneo  Hugo Horta  Paolo Malighetti  Michele Meoli  Stefano Paleari 《Higher Education》2017,74(5):775-798

This study analyses the university choices of male and female students in Italy over the 2003–2012 period and for two sub-periods before (2003–2008) and after (2009–2012) the 2008 financial crisis. The analysis is guided by human capital, signalling and preference theories and implemented through a competing destinations model that controls for the socio-economic features of both the region of origin and destination. The findings show that in the post-crisis period, males became more career-oriented in their university choices due to increasingly constrained and competitive labour markets. The constrained post-crisis labour markets led females to focus more on the educational experience than on future employability prospects. Our results suggest that the financial crisis maintained or even widened gendered social roles as they relate to university choices; specifically, males assumed an even greater career-centred family role, whereas females adopted more adaptive lifestyles that potentially place them at a disadvantage in the labour market and in society in years to come.  相似文献   

How reflexivity enhances organizational innovativeness: the mediation role of team support for innovation and individual commitment     

Maria Luisa?FarneseEmail author  Stefano?Livi 《知识管理研究与实践》2016,14(4):525-536

Reflexivity is a learning process that, through questioning and critically monitoring objectives and methods in use, promotes a change of habits and routines and, in so doing, fosters organizational performance and innovativeness. This paper looks at the contribution of team reflexivity to enhancing openness to innovation, and the mediating role of individual and team involvement. Specifically we tested whether affective commitment (Study 1, n=156) and a team climate of support for innovation (Study 2, n=152) facilitate reflexivity processes in promoting organizational openness to innovation. Overall, results confirmed that reflexivity enhances innovativeness, and this relationship is mediated by a high degree of involvement that increases the motivation of teammates and their engagement in innovation processes.  相似文献   

Do perceptions of being treated fairly increase students’ outcomes? Teacher–student interactions and classroom justice in Italian adolescents     

Luisa Molinari  Giuseppina Speltini  Stefano Passini 《Educational Research and Evaluation》2013,19(1):58-76

In this study, we have investigated the associations between the students’ perceptions of teachers’ interpersonal behaviour and some school outcomes – namely, academic achievement, learning motivation, and a sense of class belonging – considering the mediating role of classroom justice. Moreover, the impact of the school type was analysed. The research was performed on a population of 614 Italian students enrolled in 2 different types of secondary school, one with an academic orientation, the other with a vocational orientation. Structural equation modelling (SEM) was used to see the effect of the teachers’ behaviour on the dimensions of justice (i.e., equality, equity, needs, and interpersonal) and that of all these variables on academic achievement, learning motivation, and class belonging. The mediation role of classroom justice was confirmed by the analyses, and so was the impact of the school's orientation. Limitations to the study and future research ideas have also been outlined.  相似文献   

CFD application to optimise the ventilation strategy of Senate Room at Palazzo Madama in Turin (Italy)     

Stefano Paolo Corgnati  Marco Perino 《Journal of Cultural Heritage》2013,14(1):62-69

Over the last years, there was an increasing interest in keeping suitable microclimatic conditions for the preservation of artefacts: the artefacts preservation requirements may diverge from those of the museums visitors, willing to enjoy the works of art in a situation of psycho-physical wellness. The HVAC designers and engineers will have then to cooperate closely with the curator, in order to define a compromise between conflicting environmental performance requirements. In particular at the stage of air-conditioning system design or retrofit, it is extremely important to carry out a series of preliminary analysis to evaluate and monitor the existing environmental conditions and to anticipatory simulate and predict the post-intervention conditions. To this aim, advanced fluid-dynamic investigation tools (Computational Fluid Dynamic [CFD] techniques) enable to deal with the specificity of such topics and provide a useful decision-making support.  相似文献   

From local networks of SMEs to virtual districts?: Evidence from recent trends in Italy     

Maria Chiarvesio  Eleonora Di Maria  Stefano Micelli   《Research Policy》2004,33(10):1509-1528

Industrial districts as local networks of small and medium enterprises (SMEs) rooted their competitiveness in a mix of economic relationships and social ties. Recently, network technologies have promised gains of efficiency through a reduction in transaction costs and showed new commercial opportunities for small firms. Despite the morphological similarities between industrial districts and network technologies, a longitudinal analysis of ICT diffusion within Italian districts shows that the foreseen convergence between the district economic model and new technologies should not be taken for granted. The observed specific evolutionary paths concerning technology innovation in local systems also opens-up issues of economic policy.  相似文献