Small angle neutron scattering study of ancient pottery from Syracuse (Sicily,Southern Italy)

This paper is focused on a spectroscopic study of some pottery shards from an archaeological site in Syracuse (Sicily, Southern Italy), dating back to the Hellenistic–Roman period. Structural characterization was performed at different scales of observation, i.e. from macroscopic to mesoscopic. The main goal was to point out the potentiality of the small angle neutron scattering (SANS) technique as a non-invasive analytical tool in archaeometry, also in conjunction with other, more usual, methodologies. Correlation of experimental data, i.e. macroscopic typology and texture, obtained from petrographic analysis, and radius of gyration and fractal dimension of the interfaces of the mesoscopic aggregates obtained using SANS, together with mineralogical X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis, allowed hypotheses to be made on the production technology of the investigated samples.     

The Race Gap in Student Achievement Scores: Longitudinal Evidence from a Racially Diverse School District

Black and Hispanic students often display substantial gaps in test scores when compared to White students at all levels of education. In this article, we examine when and how the Black-White and Hispanic-White test score gaps develop in the early elementary grades in a California school district with a large minority population, where more than 80% of the students are Black or Hispanic. We use multivariate analysis to predict the annual reading and math test scores of a student cohort from first through fourth grade controlling for various school and family factors. We find that in this racially diverse school district achievement gaps do develop, for both Black and Hispanic students. However, in comparison to the Black-White achievement gaps, the Hispanic-White gaps develop later, in particular in math, and they are half the size of the Black-White achievement gaps. The eventual widening of the gaps for Hispanic and Black students does not seem to be the result of minority students attending schools of less quality. Finally, in contrast to previous studies with fewer minorities, the estimated achievement gaps by the fourth grade are small. ¹     

The Cultural Economy of Soil and Water Conservation: Market Principles and Social Networks in Eastern Burkina Faso

Soil and water conservation interventions in Africa have had a chequered history, calling into question the way in which soil and water conservation technologies have been studied in the past. This article draws on a case study from eastern Burkina Faso to explore an area usually ignored by soil and water conservation studies — the role of social institutions in guiding decisions regarding the use of technologies. It looks at soil and water conservation through the historical development of what the authors call the ‘cultural economy’, that is, a system of exchange in which a market economy has mixed with pre‐existing forms of exchange. The approach adopted by the authors identifies concepts on which the cultural economy is based and uses these ideas to analyse institutions that affect the choice of soil and water conservation technologies. The article shows how this approach leads to a reconceptualization of the ways in which soil and water conservation technologies are to be considered.     

Determinants of Market Extension in Knowledge-Intensive Business Services: Evidence from a Regional Innovation System

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.     

Multi-method luminescence investigations on quartz grains of different sizes extracted from a loess section in Southeast Romania interbedding the Campanian Ignimbrite ash layer

In this study we present luminescence investigations of four samples of loess bracketing the Campanian Ignimbrite/Y5 tephra at the Rasova-Valea cu Pietre site, on the eastern bank of the Danube River, southeastern Romania. Investigations involved SAR-OSL dating on aliquots of fine (4–11 μm) and medium-grained (63–90 μm) quartz, as well as single grain analyses on 125–180 μm quartz. Luminescence dating results coupled with glass-shard chemical fingerprinting assign the depositional age and origin of the ash layer to that of the Campanian Ignimbrite/Y5 tephra, dated elsewhere using ⁴⁰Ar/³⁹Ar to 39.28 ± 0.11 ka. Fine-grained (4–11 μm) quartz SAR-OSL analyses yielded ages of 44.4 ± 4.5 ka below the ash, and 41.4 ± 4.2 ka above the ash layer. Single grain analysis on coarse-grained quartz, however, demonstrates that coarse material from these samples exhibits low sensitivity and responds poorly to internal checks of the SAR protocol in comparison with the finer sediment. This observation highlights the need for more extensive investigations into the luminescence properties of quartz as well as into the origin of quartz contributions from different primary sources in the Lower Danube loess steppe.     

Tinkering Toward a National Identification System: An Experiment on Policy Attitudes

The REAL ID Act was passed in 2005 by Congress in part to address preoccupations with breaches to homeland security after the 9/11 attacks. The Act requires states to introduce more standardized state driver's licenses by 2008. The goal of this paper is to understand citizens' opinions in the area of personal identification and how these opinions may be shaped by alternative framings of the issue. Using survey responses from Michigan residents provides evidence of the following: (i) a majority of the Michigan public supports the current reforms in identification; however, a majority is not willing to incur larger costs or delays; (ii) framing the issue around immigration can generate as much support as framing the issue around terrorism; however, a more balanced discourse can dampen support; and (iii) partisan and ideological leanings moderately structure support for identification reforms. Overall the findings suggest a comfortable margin for reforms around personal identification if public safeguarding interpretations can predominate.     

Youth as a metaphor: an interview with Carmen Leccardi

Abstract

What are the specificities of youth in Italy as a group? How are they received in civil society and beyond? What kind of approaches have characterized the study of youth in Italy throughout the last decades? In this interview, the editors of this Special Issue open a conversation with Carmen Leccardi, a leading scholar in the field whose work has impacted the study of Italian youth not only in Italy but also internationally. Leccardi investigates these issues diachronically, following and commenting some salient aspects of Italian history that have had an impact on how the lives of young people have unfolded, among them social movements, policies and labour market fluctuations. Revisiting and updating the notion of uncertainty in young people’s lives, the interview concludes that youth can be considered as a metaphor particularly able to capture contemporary social changes.     

Modelling the built environment: Spatial patterns,siting techniques and layout works of non-monumental architecture in Early Bronze Age Eastern Arabia

Interest in the built environment of Early Bronze Age (EBA) Eastern Arabia is rapidly increasing with the emergence of new field data from the excavation of settlement sites. However, little is known about architectural planning and spatial patterns in the region. This article explores non-monumental architecture throughout the third millennium BCE. A series of methods (Pythagorean triples, modular grids, interception of circles) were used to assess the geometric and metric characteristics of buildings, and to stress regularities and variation in the long term. The results of these analyses suggest the application of specific techniques in layout and construction works: the intersection of circles during the Hafit occupations, and more sophisticated techniques, combining the properties of circles and triangles, during the Umm an-Nar period. The diachronic approach allowed by the temporal span of the occupations highlights a firm progression of architectural paradigms and building crafts throughout the EBA. The evidence hints at the existence of a specialised workforce since the dawn of the Bronze Age, and reveals a sharp increase of technicity and standardisation towards the end of the third millennium.     

Modeling and deterioration mapping of façades in historical urban context by close-range ultra-lightweight UAVs photogrammetry

Deterioration mapping of façades may be a challenging task in historical urban contexts, often characterized by narrow streets and tall buildings. In these situations, the application of Terrestrial Laser Scanning or Terrestrial Photogrammetry does not provide satisfactory results. Furthermore, the use of Unmanned Aerial Vehicles, the so-called “drones”, is generally forbidden in crowded places for safety reasons unless they are lighter than a weight imposed by the regulations in force in each country. This article presents the application of a very small and ultra-lightweight drone (less than 300 g) equipped with a low-cost camera, particularly suitable for operating in very narrow spaces. A close range photogrammetric survey performed to analyze a huge historical building façade in Bologna (Italy) pointed out a good accuracy level, confirmed by the validation of the results carried out by a 3D laser scanner survey. Moreover, a map of the degradation has been realized to support further restoration analysis, demonstrating that this low-cost, fast, and easy-to-use survey technique can be applied to other similar urban contexts at the same time.     

‘Heritage talks. Heritage calls’: some instances of the canonisation policy of John Paul II in Italy

During his long pontificate, John Paul II pursued a wide and carefully articulated policy of canonisations whose aim was to underwrite his magisterium by presenting hagiographical models that would convey well-defined pastoral teaching and contain both ecclesiastical and ecclesiological messages for the faithful. The high number of Italians declared blessed and/or made saints analysed in the present article is proof of the special interest the Pope showed in Italy and specifically in the sanctity of the country. The high concentration of beatifications and canonisations of hagiographical figures from Italy can be explained only in part by the canonical system, which regulates the process of canonisation and which makes it easier to open and support a cause, above all from a financial point of view, if the pressure group behind the candidate for sainthood is located near the Vatican. More precisely, what emerges is both the attempt to create a specific public image of Italy as a nation which has been a historic stronghold of Catholicism and is still capable of reacting to secularisation, and the objective of laying down more effective guidelines and robust directives for civil society. In other words, by proposing Italian hagiographical models, John Paul II was striving to mould Italy's national identity in a Christian form, conferring on the country the role of model for other European states.