Monitoring façade soiling as a maintenance strategy for the sensitive built heritage

The color patterns generally found on the façades of architecturally sensitive buildings have an adverse impact on their aesthetics, to the detriment of their identity and potential economic value. A quantitative and qualitative study was conducted of the perception of aesthetic decay in the limestone on a heritage building. The study assessed building aesthetics between two façade cleaning operations, conducted in 1984–1986 and 2006–2008. Based on the calculation of the final or total soiling index, by means of in situ lightness measurement and three architectural design variables, the color distribution of the façades was quantified in 2006 and a model was developed to monitor façade soiling over time. The proposed model, a tool for planning preventive façade maintenance on architecturally sensitive buildings, advocates for sustainable cleaning operations. Its premise that periodic cleaning should only be conducted in areas where the limestone is affected by aesthetic decay redounds to minimised intervention and lower building management costs.     

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.     

POPULATION DISPERSION VS. CONCENTRATION IN A TWO‐REGION MIGRATION MODEL WITH ENDOGENOUS NATURAL AMENITIES*

ABSTRACT Contrary to the predictions of the basic spatial equilibrium model, the long‐run distribution of population across rural U.S. counties with high‐valued natural amenities has become relatively more concentrated versus dispersed. We provide an explanation by developing a two‐region model with mobile labor, production externalities and endogenous natural amenities. We find that strong preferences for natural amenities generally foster population dispersion. However, such preferences can also lead to population concentration when ecological degradation is low and man‐made capital is a relatively scarce input into natural amenity production. Investments that enhance natural amenities are found to reduce the divergence between the steady state and optimal outcomes.     

Stuttering and stress

Ruby Rohrlich Leavitt. The Puerto Ricans: Culture Change and Language Deviance. Tucson: The University of Arizona Press, 1974. ix + 268 pp. Tables, bibliography, and index. $4.95 (paper).     

The informal diplomacy of the Australian American Leadership Dialogue

After 20 years, the Australian American Leadership Dialogue has acquired enviable access to political leaders in the foreign policy establishments of both countries. The influence of the Dialogue is at earlier consensus-building stages of decision making. Its importance has been in ‘relationship maintenance’ of the bilateral alliance which it has pursued through processes of informal diplomacy. The Dialogue now faces its own challenges of organisational renewal and relevance in the wider ‘interpretative community’ of Australian think tanks, university policy institutes and opinion-formers.     

Reconstructing prey selection,hunting strategy and seasonality of the early Holocene frozen site in the Siberian High Arctic: A case study on the Zhokhov site faunal remains,De Long Islands

The Zhokhov site is one of the northern most archaeological sites in the world and a very ancient vestige of occupation of high latitudes by people, indicating that this territory was settled as early as about 8000 years ago. Investigation of the site began in 1989–1990 and then continued in 2000–2005. Here we consider the taphonomy, spatial distribution, species and age- and sex-related composition of the faunal remains from the Zhokhov site. These data allow conclusions regarding the subsistence strategy practiced by Zhokhov inhabitants, including the hunting tactics. This was a peculiar adaptation model based on reindeer and polar bear hunting in a 2:1 ratio. Reindeer hunting was all-seasonal, whereas polar bears were hunted mostly in winters at their dens. Mortality data for reindeer and polar bears depict the yearly subsistence cycle. The Zhokhov site is found to be a base camp occupied year-round with modest summer activities, while wintertime is characterised by intense polar bear hunting. Most reindeer were hunted in the fall. Subsistence strategy of the Zhokhov hunters was largely facilitated by the fact that at the time of occupation Zhokhov Island was still part of the coastal Siberian plain margin.     

An experimental evaluation of an anti-corruption intervention among Ukrainian university students

In this paper, we investigate experimentally the effect of an anti-corruption intervention – an info folder based on materials developed by Transparency International – on Ukrainian university students’ willingness to participate in an anti-corruption campaign and their general attitude toward corruption. In a survey of 600 students in the Ukrainian city of Lviv, individuals were randomly exposed to either the anti-corruption folder (treatment group) or a folder with information about Lviv (control group). The results suggest that students who have previous experience with bribing are more open to the campaign, while the effect on the total sample is not statistically significant. Furthermore, the intervention increases the overall perception that corruption is a (long-term) part of society rather than a temporary phenomenon. Finally, students with experience in corrupt practices tend to adopt a more negative view of corruption. For those without such experiences, however, we find some indication that the treatment could bolster the acceptance of corruption by instructing the students about its dissemination. The effects of this intervention are therefore ambivalent and appear to depend on the students’ previous exposure to corruption.     

China’s new Eurasian ambitions: the environmental risks of the Silk Road Economic Belt

China is moving ahead with the Silk Road Economic Belt, an ambitious infrastructure development agenda with the distinct promise of regional and sub-regional economic development. However, the initiative will create new environmental risks across the entire Eurasian continent, especially in countries with predominately poor records of environmental governance, including the former Soviet republics and Russia. Concurrently, on the domestic front, the Chinese Government has launched a new policy paradigm, “ecological civilization,” to dramatically improve environmental regulations, reduce pollution, and transform industries by adopting new green technologies and higher environmental standards. But does China’s intention to go through a “green shift” domestically resonate with these new transborder infrastructure development mega-projects? This paper will attempt to answer this question by juxtaposing China’s new domestic policy paradigm with environmental standards currently proposed in its global outreach projects focusing on China-northern Eurasia and China-Russia, including trade exchanges in natural resources.     

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.     

Nikolai V. Konovalov (1900-1966): his role in the development of neurology and the creation of the Institute of Neurology of the Russian Academy of Medical Sciences

Nikolai V. Konovalov (1900-1966) has left a significant imprint in the history of Russian neuroscience. He was among the coryphaei of international and national neurology. Along with the large number of fundamental scientific papers that have determined several aspects of the development of neuroscience, his contribution has been equally important to the establishment and development of one of the distinguished Russian scientific centers - the Institute of Neurology of the Russian Academy of Medical Sciences, which he headed from 1948 until 1966.