Experimental Investigation on Steel W-Shaped Folded Plate Dissipative Connectors for Horizontal Precast Concrete Cladding Panels

A dissipative connector device, consisting of a steel plate folded at right angle along three lines to get a W-shaped profile, is proposed for the safe fastening of the horizontal cladding panels of new or existing precast structures under seismic action. Experimental tests are carried out to characterize the hysteretic behavior of the connector device. Different technological features, restraint conditions, and loading protocols are considered. Nonlinear hysteretic models are validated against the results of pseudo-dynamic tests on a full-scale prototype of precast building with cladding panels. Guidelines for the design of the dissipative connector device are provided.     

Production of the Roman Cement in Italy: characterization of a raw material used in Tuscany between 19th and 20th century and its comparison with a commercialized French stone material

An experimental approach in order to investigate the possibility that some Italian limestones were used for the production of Roman Cement is proposed. Three types of Pietra Alberese, a marly limestone used since Roman times for the production of “lime” in Tuscany (Italy), were selected. By burning of these stones, specimens of binders were realized. The characteristics of these binders were compared with the binder obtained by burning a French marly limestone commercially used for the production of Roman Cement.

All samples of carbonate stones were preliminarily characterized from the chemical, mineralogical, and petrographic point of view. The colorimetric coordinates were measured on both rock samples and hardened binder samples. The analysis carried out shows that Pietra Alberese with an high content of clay minerals develops a similar microstructure with respect to that developed by the French marly limestone used for the production of Roman Cement.     

Unchanging boundaries: the reconstruction of Skopje and the politics of heritage

This study discusses the politics of urban planning and heritage in the city of Skopje, Macedonia. I compare three phases of urban reconstruction under three political systems: the inter-war Kingdom of Serbs Croats and Slovenes, the communist regime and present-day ‘democracy’. I show that the ambiguous marginalisation of Ottoman heritage has been a continuous practice, despite today’s reading of communist planning as ‘open’. Through a discussion of Yugoslav politics towards religious and national ‘minorities’, I show that Ottoman heritage has been preserved only insofar as it fits within the state’s definition of power. I specifically detail how the construction of ‘European’, ‘secular’ public space has worked as a tool through which state/nation building established new hierarchies of power. I show how this is reflected most clearly in the specific politics of heritage by discussing the creation, regulation and management of ‘?ar?ija’, the ‘old Turkish’ neighbourhood of Skopje.     

The Eurozone crisis and Italian corporate governance: the end of blockholding?

This article explains the process of change in domestic corporate governance. An actor-centred coalitional approach is applied to the Italian case to show how the main features of domestic corporate governance are a product of behavioural patterns (i.e. informal institutions), rather than formal legislation. Leveraging their superior financial means, business elites act as institutional incumbents shaping these informal institutions according to their preferences. It is argued that a change in corporate practices is more likely to be triggered by a socio-economic crisis, which weakens the domestic elite’s influence, rather than a legal reform. These findings call into question the excessively formalistic approach of many corporate governance scholars, and are confirmed by the Italian trajectory. After having resisted 20 years of liberalising legal reforms aimed at eroding their power, Italian blockholders are now being forced, as a consequence of the Eurozone sovereign debt crisis, to dismantle their cross-shareholding networks.     

Archaeometric study of natural hydraulic mortars: the case of the Late Roman Villa dell’Oratorio (Florence,Italy)

This paper shows the results of a multidisciplinary study carried out on the mortars from the Late Roman Villa dell’Oratorio (fourth-sixth ad), an aristocratic mansion built in the lower Valdarno (Florence, Italy). Thirty-one bedding mortar and plaster samples were analysed through optical microscopy, thermogravimetric analysis, X-ray powder diffraction and scanning electron microscopy with energy-dispersive X-ray spectroscopy for determining the chemical, mineralogical and petrographic characteristics, while their main physical properties were measured by geotechnical procedures. The collected data indicates that the analysed mortars are made up of very fine to coarse river sand aggregate mixed with white to yellowish-white natural hydraulic lime binder mainly consisting of mixtures of prevailing calcite and hydraulic compounds. With regard to the origin of the raw materials, the aggregates were recognized to be selected Arno river sands, and the binders are the burning product of a local marly limestone (ex Alberese). Therefore, the mortars of the Late Roman Villa dell’Oratorio are one of the first uses of natural hydraulic lime in the lower Valdarno.     

AGGLOMERATION AND GROWTH WITH ENDOGENOUS EXPENDITURE SHARES*

ABSTRACT We develop a New Economic Geography and Growth model which, by using a CES utility function in the second‐stage optimization problem, allows for expenditure shares in industrial goods to be endogenously determined. The implications of our generalization are quite relevant. In particular, we obtain the following novel results: (1) two additional nonsymmetric interior steady states emerge for some intermediate values of trade costs. These steady‐states are stable if the industrial and the traditional goods are either good or very poor substitutes, while they are unstable for intermediate (yet lower than one) values of the intersectoral elasticity of substitution. In the latter case, the model displays three interior steady states—the symmetric and the core‐periphery allocations—which are stable at the same time; (2) agglomeration processes may always take place, whatever the degree of market integration, provided that the traditional and the industrial goods are sufficiently good substitutes; (3) the regional rate of growth is affected by the interregional allocation of economic activities even in the absence of localized spillovers, so that geography always matters for growth and (4) the regional rate of growth is affected by the degree of market openness: in particular, depending on whether the traditional and the industrial goods are good or poor substitutes, economic integration may be, respectively, growth‐enhancing or growth‐detrimental.     

Disability and work inclusion in Italy: between unfulfilled promises and new disability culture

This article outlines the existing provisions in Italy for inclusion in workplaces for persons with disabilities. It reports available statistics on the numbers of persons with disabilities in paid employment by sector, those seeking work and drawing pensions and those employed according to educational qualification. It considers the different channels, both formal and informal, through which persons with disabilities are able to gain access to paid employment and the concrete effects of Law 68/1999 on access to work and collocamento mirato (targeted work placement). One of the problems with the Italian legislation on compulsory work placement of disabled persons is that it applies only to employers who have at least 15 employees, whereas the vast majority of employers in Italy have fewer than 10. Lastly, the article reflects on the current situation and the challenges posed by new ways of conceiving of disability and of work. Work needs to be understood not simply as an occupation or position for which one receives payment but as a set of social relations between people, which has value in itself.     

Local and territorial determinants in the realization of public–private–partnerships: an empirical analysis for Italian provinces

ABSTRACT

Relational networks and intangible factors are crucial elements for the competitiveness of a territory. Public–Private–Partnerships (PPPs), in particular, allow for the provision of goods and services that favour the exploitation of complementarities between public and private resources. They aim at promoting an increase in the overall efficiency of investment projects through a complex mechanism that distributes risk and revenues among stakeholders. This paper examines the local and territorial determinants of PPPs through an econometric analysis based upon Italian municipal data, grouped at the provincial level. Using a tobit model, we analyse the relationship between the realization of successful PPP initiatives and different sets of factors, including less analysed local and territorial determinants. We stress the role of the local management of infrastructure assets, the administrative efficiency of local authorities and the diffusion of previous local development initiatives. Local management and territorial context factors explain most of the occurrence of successful PPP initiatives in the pre-crisis period while usual determinants (infrastructure endowment and financial distress) display a weaker effect.