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61.
Marco Bettiol Valentina De Marchi Eleonora Di Maria Roberto Grandinetti 《European Planning Studies》2013,21(4):498-515
Several studies have emphasized the role of knowledge-intensive business services (KIBS) in fostering innovation in metropolitan areas and regional innovation systems. Such areas are capable of expressing a strong demand for KIBS and consequently stimulate the rise and growth of KIBS. Despite an abundance of literature on KIBS emphasizing the relevance of spatial proximity to customers, many KIBS develop relationships on a broader national or even international scale. No studies have focused explicitly on this apparent discrepancy as yet. The aim of this paper is therefore to fill this theoretical and empirical gap by explaining the firm-level factors relating to the market extension of KIBS within the framework of regional innovation systems. Our analysis is based on a quantitative study on more than 150 KIBS supplying design or communication services located in the Veneto region (north-eastern Italy), an area that can be described as a regional innovation system. Five variables were considered, that is, size, experience, service standardization, investments in network technologies and relational intensity. Our results confirm that three of these variables, but not service standardization and relational intensity, correlate positively with the market extension of KIBS. Policy implications are also discussed. 相似文献
62.
Daniela Di Martino Enrico Perelli Cippo Irene Uda Maria Pia Riccardi Roberto Lorenzi Antonella Scherillo Manuel Morgano Costanza Cucini Giuseppe Gorini 《Archaeological and Anthropological Sciences》2017,9(4):515-522
There is not only one methodology for the study of mineralogical phases in archaeological samples. In this paper, we discuss a strategy applied to ancient iron nail samples completely based on non-destructive analyses. The archaeological samples come from the archaeological site of Valle delle Forme (province of Brescia–Italy) and date back to the 1300–1400 ad. Neutron-based techniques, like time-of-flight neutron diffraction and neutron tomography, have been used to determine the mineralogical composition and the structure of nails. An independent check for the assessment of the presence of different mineralogical phases was given by Raman spectroscopy. The combination of different non-destructive techniques has provided very useful information on their chemical composition, nature of the patina and corrosion features of the nails (also in the bulk of the samples). 相似文献
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64.
Stefano De Luca Inmaculada Alemán Francesca Bertoldi Luigi Ferrante Paola Mastrangelo Mariano Cingolani Roberto Cameriere 《Journal of archaeological science》2010
Estimation of age at death is an unavoidable step in the process of human identification, both in forensic practice and in the anthropological and palaeopathological study of skeletal remains. In several cases, in which medical or demographic records are completely lacking, a reliable estimation of the age at death becomes very important. Skeletal remains from archaeological contexts suffer from several biasing factors such as post-mortem changes, taphonomy and various burial practices depending on age, sex and social status of the deceased persons. 相似文献
65.
Kathleen McSweeney Sophie Méry Roberto Macchiarelli 《Arabian Archaeology and Epigraphy》2008,19(1):1-14
The Hili archaeological complex in Al Ain (U.A.E.) is important for its wealth of third-millennium BC Umm an-Nar burial and settlement sites. Two of the most significant burial sites are Tomb N at Hili and Tomb A Hili North. The latter is a classic circular Umm an-Nar monumental grave, while Hili N is a pit-grave, one of only two Umm an-Nar period pit-graves discovered so far in the U.A.E. Both of these tombs contained the remains of hundreds of individuals, in the case of Tomb A Hili North, more than 300, while around 600 people had been deposited in Hili N. Both population groups have been the subject of anthropological and artefactual analyses and a comparison of the findings help to shed light on the chronology of the end of the Umm an-Nar period. 相似文献
66.
Regional Efficiency in the European Union 总被引:1,自引:0,他引:1
This paper examines existing disparities in technical efficiency levels across the European regions over the period 1986–2002. The results reveal that technical efficiency is not randomly distributed across space in the European setting. On the contrary, the different tests performed highlight the presence of positive spatial autocorrelation and spatial heterogeneity in the distribution under consideration. In fact, we have detected several regional clusters characterized by similar efficiency levels distinguishing them from the rest of the sample. Nevertheless, the estimates carried out show the existence of a process of regional convergence in terms of technical efficiency during the study period. Our findings also reveal that factors such as the regional stock of capital per worker or the patterns of productive specialization are relevant in explaining the changes in technical efficiency experienced by the European regions between 1986 and 2002. 相似文献
67.
Elisabetta Gliozzo Francesca Giannetti Roberto Goffredo Darian Marie Totten 《Archaeometry》2023,65(1):118-135
The investigation of 38 late antique vessels from the archaeological excavation of Salapia has been performed using EMPA and LA-ICP-MS. The collection was made using impure sands and mineral soda. Among coloured glass, most vessels were made of ‘fresh’ glass. The use of colouring agents is rare, and most decoloured glass is obtained by Mn addition. Sb-decolouration is limited to one cup, and two colourless vessels show both manganese and antimony. As for provenance, the prevalence of Egyptian-HIMT glass over the Levantine is evident. Among Levantine glass, Jalame glass is represented, whereas Apollonia glass is absent. Among Egyptian (and deemed Egyptian) glass, the prevalence of HIMT glass over the other types has been observed. The high attestation of fresh glass, most notable in the earlier centuries, suggests the importation of glass in the form of finished objects, especially luxury vessels. 相似文献
68.
Roberto Cantoni 《History & Technology》2016,32(1):33-69
During the Algerian war (1954–1962), beside the war events proper, another conflict took place: a diplomatic and technocratic battle for the possession of Saharan oil resources in the name of national energy security. Its main actors were France, Italy, the US, and Algerian independence fighters. In the case I analyse in this paper, I show that the three Western-block countries used their local knowledge of the subsurface given by the collaboration of the three elements of: (1) geoscientists, (2) their national oil companies, and (3) their respective diplomatic bodies, in order to carve out a prominent place for themselves in the exploitation of Saharan resources. Algerian nationalists also succeeded in benefiting from this knowledge. I argue that this struggle for natural resources in a post-independence scenario, and the corresponding role of the geosciences in it, significantly contributed to influence the final configuration of the postwar Algerian hydrocarbon sector. 相似文献
69.
David Beresford-Jones Alexander Pullen George Chauca Lauren Cadwallader Maria García Isabel Salvatierra Oliver Whaley Víctor Vásquez Susana Arce Kevin Lane Charles French 《Journal of Archaeological Method and Theory》2018,25(2):393-425
Moseley’s (1975) Maritime Foundations of Andean Civilization hypothesis challenges, in one of humanity’s few pristine hearths of civilization, the axiom that agriculture is necessary for the rise of complex societies. We revisit that hypothesis by setting new findings from La Yerba II (7571–6674 Cal bp) and III (6485–5893 Cal bp), Río Ica estuary, alongside the wider archaeological record for the end of the Middle Preceramic Period on the Peruvian coast. The La Yerba record evinces increasing population, sedentism, and “Broad Spectrum Revolution” features, including early horticulture of Phaseolus and Canavalia beans. Yet unlike further north, these changes failed to presage the florescence of monumental civilization during the subsequent Late Preceramic Period. Instead, the south coast saw a profound “archaeological silence.” These contrasting trajectories had little to do with any relative differences in marine resources, but rather to restrictions on the terrestrial resources that determined a society’s capacity to intensify exploitation of those marine resources. We explain this apparent miscarriage of the Maritime Foundations of Andean Civilization (MFAC) hypothesis on the south coast of Peru by proposing more explicit links than hitherto, between the detailed technological aspects of marine exploitation using plant fibers to make fishing nets and the emergence of social complexity on the coast of Peru. Rather than because of any significant advantages in quality, it was the potential for increased quantities of production, inherent in the shift from gathered wild Asclepias bast fibers to cultivated cotton, that inadvertently precipitated revolutionary social change. Thereby refined, the MFAC hypothesis duly emerges more persuasive than ever. 相似文献
70.
Valerio Benzi Laura Abbazzi Paolo Bartolomei Massimo Esposito Cecilia Fassò Ornella Fonzo Roberto Giampieri Francesco Murgia Jean-Louis Reyss 《Journal of archaeological science》2007
Radiocarbon and U-series methods (230Th/U and 231Pa/235U) for absolute age determination have been applied to some fossil samples from Grotta Juntu, in North Eastern Sardinia (Italy). The remains belong to the endemic deer species Praemegaceros cazioti, which is here represented by an almost complete skeleton. The three dating methods lead to concordant ages of about 7500 years BP, indicating that the skeleton was maintained as closed system after burial. Taking into consideration these results, Praemegaceros cazioti from Grotta Juntu is now the youngest representative of this species in Sardinia. 相似文献