Performance and Risks of Salt-Accumulating Renders in Relation to Their Moisture Transport Properties

Salt-accumulating renders are usually applied in several layers with different specific properties of moisture transport. An extensive experimental programme was carried out to establish a relationship between those properties of individual layers and the performance of combined systems on a salt-laden substrate. Each of the 20 renders was characterized separately in absorption and drying tests, vacuum saturation tests, dry cup tests, mercury intrusion porosimetry, and ultrasound wave velocity measurements. Each of the 12 combined render systems was applied on a brick, which was then saturated with a concentrated NaCl solution by free capillary uptake. Subsequently the assembly was closed at the bottom and subjected to an accelerated drying test (50° C and 15% relative humidity). Moisture and salt profiles over the depth were taken regularly during 1 month. The results reveal very different degrees of effectiveness and levels of risk for the substrate, which are related to the moisture transport properties.     

Evidence for early cat taming in Egypt

The remains are described of a young small felid found in a Predynastic burial at Hierakonpolis, Upper Egypt. Osteometric and zoogeographical arguments indicate that the specimen, dated to around 3700 B.C. on the basis of the associated pottery, belongs to Felis silvestris. In the same cemetery several other animal species, both wild and domestic, have been found. The left humerus and right femur of the cat show healed fractures indicating that the animal had been held in captivity for at least 4–6 weeks prior to its burial. We believe that this pathology suggests early cat taming more convincingly than a buried cat recently reported from Neolithic Cyprus (7500 B.C.). Such taming events were probably part of the processes that eventually led to the domestication of Felis silvestris. However, the absence of the cat in Predynastic and Early Dynastic depictions and its rare attestation in the archaeozoological record indicates that domestic status had not yet been attained during those early periods. Other species that were also held in captivity by Ancient Egyptians probably never became domesticated because they had one or more characteristics that prevented it.     

On the Stickiness of Territorial Stigma: Diverging Experiences in Amsterdam’s Most Notorious Neighbourhood

In Western Europe, a select number of “ghettos” are at the forefront of public anxieties about urban inequality and failed integration. These notorious neighbourhoods at the bottom of the moral spatial order are imagined as different and disconnected from the rest of the city. This paper examines how residents in Amsterdam Bijlmer, a peripheral social housing estate long portrayed as the Dutch ghetto, experience the symbolic denigration of their neighbourhood. Interviews show that all residents are highly aware of the negative racial, cultural and material stereotypes associated with their neighbourhood. However, these negative stereotypes are not equally felt: territorial stigma “sticks” more to some residents than others and substantial inequalities are observed in who carries the burden of renegotiating blemish of place. Differential engagement with stigma depends on how residents’ identity and the materiality of their surroundings intersect with stigmatising narratives of place.     

The use of stereoscopic images taken from a microdrone for the documentation of heritage – An example from the Tuekta burial mounds in the Russian Altay

To analyse, interpret and manage our cultural heritage it is important to have an accurate and realistic representation of it. Documenting this heritage involves geographic techniques such as photogrammetry, for which a lot of rather expensive and extensive platforms are already in use. However, a microdrone, a recently developed unmanned aerial vehicle platform is a cheaper and easy to handle tool. To test the very limits of the microdrone and its accompanying data-acquisition and data-processing software, we collected data from a remote area in Tuekta, in the Russian Altay Mountains. This paper presents the challenges faced during the whole photogrammetric procedure from planning the flights to producing the final deliverables.     

Early cat taming in Egypt: a correction

A cat skeleton from a Predynastic burial in Egypt that was previously labelled as Felis silvestris is re-identified as Felis chaus. This means that the previous claim needs to be withdrawn that the specimen represents early evidence for taming of Felis silvestris that ultimately led to domestication. However, the statement that the small felid has been held in captivity for several weeks, based on the presence of healed fractures, is still valid.