Spectroscopic methods for the analysis of celadonite and glauconite in Roman green wall paintings     

Ligia Maria Moretto  Emilio Francesco Orsega  Gian Antonio Mazzocchin 《Journal of Cultural Heritage》2011,12(4):384

One set of samples from wall paintings of the X^th Regio of Italy containing green colours was analysed exploiting different spectroscopic techniques, aiming to identify the pigments used. The possibility to distinguish between glauconite and celadonite, the most common green pigments used in such paintings, was of particular interest. Samples of celadonite from Monte Baldo and glauconite from Belgium were considered as standard materials for comparison. The results obtained using FTIR, EDS, AAS, Colorimetry, Raman and EPR spectroscopies were compared for the identification of the green pigments.  相似文献   

THE ARCHIVES OF AMERICAN EDUCATIONAL HISTORY     

Francesco Cordasco 《Review of Education, Pedagogy & Cultural Studies》2013,35(3):285-297

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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

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Green intellectual capital and environmental product innovation: the mediating role of green social capital     

Miriam Delgado-Verde  Javier Amores-Salvadó  Gregorio Martín-de Castro  José Emilio Navas-López 《知识管理研究与实践》2014,12(3):261-275

Although the importance of intellectual capital has already been highlighted in the management literature, few articles have focused on the importance of its green counterpart, green intellectual capital. Nowadays, when environmental concerns cannot be ignored by firms, it is therefore time to explore the role of green intellectual capital in environmental improvement. For that reason, our research aims to explore the relationships between green intellectual capital components and the environmental performance of the firms. In particular, we try to show the importance of green organizational and social capital in the development of environmental product innovations, which are vital to the development and implementation of environmental strategies since, as scholars have pointed out, they generate some of the greatest environmental impacts. The empirical results show that green organizational capital has an indirect impact on environmental product innovation through green social capital, meaning that the latter is a significant mediator of that relationship, and at the same time emphasizing that informal relationships play a key role in the improvement of the environmental performance of the firm and, more specifically, in the development of environmental product innovations.  相似文献   

On the Shapley value and its application to the Italian VQR research assessment exercise     

Camil Demetrescu  Francesco Lupia  Angelo Mendicelli  Andrea Ribichini  Francesco Scarcello  Marco Schaerf 《Journal of Informetrics》2019,13(1):87-104

Research assessment exercises have now become common evaluation tools in a number of countries. These exercises have the goal of guiding merit-based public funds allocation, stimulating improvement of research productivity through competition and assessing the impact of adopted research support policies. One case in point is Italy's most recent research assessment effort, VQR 2011–2014 (Research Quality Evaluation), which, in addition to research institutions, also evaluated university departments, and individuals in some cases (i.e., recently hired research staff and members of PhD committees). However, the way an institution's score was divided, according to VQR rules, between its constituent departments or its staff members does not enjoy many desirable properties well known from coalitional game theory (e.g., budget balance, fairness, marginality). We propose, instead, an alternative score division rule that is based on the notion of Shapley value, a well known solution concept in coalitional game theory, which enjoys the desirable properties mentioned above. For a significant test case (namely, Sapienza University of Rome, the largest university in Italy), we present a detailed comparison of the scores obtained, for substructures and individuals, by applying the official VQR rules, with those resulting from Shapley value computations. We show that there are significant differences in the resulting scores, making room for improvements in the allocation rules used in research assessment exercises.  相似文献   

State of the library and information science blogosphere after social networks boom: A metric approach     

Daniel Torres-Salinas  lvaro Cabezas-Clavijo  Rafael Ruiz-Prez  Emilio Delgado Lpez-Czar 《Library & information science research》2011,33(2):168-174

A metric analysis of blogs on library and information science (LIS) between November 2006 and June 2009 indexed on the Libworm search engine characterizes the community's behavior quantitatively. An analysis of 1108 personal and corporate blogs with a total of 275,103 posts is used to calculate survival rate, production (number of posts published), and visibility via such indicators as links received, Technorati authority, and Google's PagePank. Over the study period, there was a 52% decrease in the number of active blogs. Despite the drop in production over this period, the average number of posts per blog remained constant (14 per month). The most representative blogs in the discipline are identified. The emergence of such platforms as Facebook and Twitter seems to have meant that both personal and corporate blogs have lost some of their prominence.  相似文献   

On IT systems and knowledge sharing in MNCs: a lesson from Siemens AG     

Francesco?CiabuschiEmail author 《知识管理研究与实践》2005,3(2):87-96

This explorative case study aims at shedding light on the utilization of a specific Intranet-based knowledge-sharing platform, the ShareNet. This system is part of a €1bn investment campaign to transform Siemens into an e-driven company, and it is an important example of system enabling knowledge sharing between local subsidiaries within large multinationals. By investigating how such company-wide system is structured and employed a theoretical model and three propositions about IT contribution to intra-firm knowledge sharing are formulated. Findings lead to the conclusion that, on one hand, IT systems represent an efficient mechanism for knowledge duplication through imitation between units with similar capabilities and, on the other, as a trigger for direct interaction resulting in knowledge development through joint problem solving between units having complementary capabilities.  相似文献   

The role of copper on colour of palaeo-Christian glass mosaic tesserae: An XAS study     

Alberta Silvestri  Serena Tonietto  Francesco D’Acapito  Gianmario Molin 《Journal of Cultural Heritage》2012,13(2):137-144

This work reports mainly the results of an X-ray Absorption Spectroscopy (XAS) study carried out on coloured glass tesserae from the palaeo-Christian mosaic which decorated the votive chapel of St. Prosdocimus (Padova) until its replacement with the current frescoes of Renaissance age, and which is one of the only two known mosaics in the Veneto region (Italy). The study aims at clarifying how the different local structure, oxidation state and quantity of copper influenced colour. Analysis of high-resolution Cu-K edge X-ray Absorption Near Edge Structure (XANES) and Extended X-ray Absorption Fine Structure (EXAFS) spectra showed that copper is present as cuprite (Cu₂O) in orange samples and as metallic copper in red and brown ones. These phases are responsible for both the colour and opacity of the samples. In addition, Cu¹⁺ ions linked to the oxygen atoms of the glass framework were identified in ratios of about 60% and 30% of total copper in orange and red/brown samples, respectively. In blue and green samples, copper is dispersed in the glass matrix as a mixture of Cu¹⁺ and Cu²⁺ ions, and no crystalline phases are visible. In this context, the Cu¹⁺ and Cu²⁺ contents in glass were also quantified thanks to suitable standards, demonstrating that, when Cu²⁺ is the main chromophorous ion, colour intensity is directly correlated to its content in the glass. In particular, in green and blue samples, coloured by copper, Cu²⁺ content varies from 26% to 56% of total copper, and the higher contents of Cu²⁺ are shown by more intensely coloured samples. It should be stressed here that the green colour of the analysed tesserae is given by the physical interaction of blue colour, due to Cu²⁺ ions, and yellow colour, due to Pb antimonates used as opacifiers.  相似文献   

Teachers reflecting on their work: articulating what is said about what is done     

Juan José Mena Marcos  Emilio Sánchez 《Teachers and Teaching》2013,19(2):95-114

Teachers' written reflections on their work, which report on a change in their practice, were the object of this research. Taking teachers' articulation of their plans and actions in teacher journals as our source, this study's aim is twofold: (1) to describe how teacher reflect in a self‐initiated and non‐framed way on their own practice, and (2) to review teacher self generated reflections in reference to models of reflection. In this way, we tried to disclose what precisely teachers write (said) when reflecting on their work (did) in order to appreciate their way of describing what matters in their work; and position this in reference to models that conceptualise (“talk”) on how to actualise (‘walk’) reflection. This ‘double’ articulation of reflection is gauged in two ways, i.e., on: a) completeness, that is, whether it includes relevant components of reflection (models) to be found in the literature, and on b) recursiveness, that is, whether the written account gives evidence of an integrated cyclical, i.e., recursive process of re‐view, which appraises and looks back on what has been accomplished.

The results show that teachers do not work along the lines identified in current reflection models (i.e. providing clear problem definition, searching for evidence, planning for change, and reviewing plans). Instead, many teachers use a narrative and valuing appraisal of their accomplishments; not so much cautiously reviewing their actions but prospectively commenting on plans and solutions for future action. The data lead us to be cautious about the prominence of reflection models as advocated in the literature to be applied to teachers' written accounts of their practice.  相似文献   

Entering the European Information Society: Four Rural Development Projects     

Pernilla Gripenberg  Ingjerd Skogseid  Francesco Botto  Andrea Silli  Virpi Kristiina Tuunainen 《The Information Society》2004,20(1):3-14

This article compares four European information and communication technologies (ICT) development projects spawned by national and EU initiatives to create the “European information society.” These projects, which sought to support learning and better use of ICT, were all the result of opportunities opened up by political initiatives. The analysis indicates that the main problems that afflict these projects stem from varied expectations and interests of the major actors. These problems can be mitigated considerably if a feeling of ownership is generated among the participants. This sense of belonging, however, is difficult to foster in a “top-down” project. Hence there is a need for a better balance between the “top-down” and “bottom-up” influences in the development of such projects.  相似文献