Clusters and Industrial Districts: Where is the Literature Going? Identifying Emerging Sub-Fields of Research

The industrial district and cluster literature has generated an extraordinary quantity of articles, debates and topics for discussion, and encompasses one of the most vibrant lines of research in the field of economics, geography, management and related disciplines. The literature, however, is fairly fragmented. In this paper, “bibliometric” methods are used to analyse the cluster literature published between 1957 and 2014 in order to explore “prospective” research priorities through the method of “bibliographic coupling”. Beyond focusing on foundational works in the past, this approach shifts the focus away from the practice of analysing co-citations and seminal contributions to one of looking at current and emerging trends in the literature. Using the ISI Web of Knowledge (Web of Science) as a database, an examination of two samples of 3955 and 2419 articles is made. Results reveal the existence of sub-fields of inquiry that follow their own particular research agendas, which remain distinct yet interconnected to one another.     

Reaction to Fire of Existing Timber Elements Protected With Fire Retardant Treatments: Experimental Assessment

Fire safety is an important issue of building safety, especially when the building’s fire load contents enhance the risks of fire deflagration. When existing timber structures are involved, the most usual way to improve its reaction to fire is to treat wood with fire retardants. This study focuses on the surface protection of existing timber roof structures against fire, through the use of fire retardant (FR) treatments applied on site. An experimental investigation was carried out to study the effect of FR treatments on timber reaction to fire, with a special emphasis on timber members with biological deterioration and previously treated with preservative products. The behaviour and effectiveness of intumescent and non-intumescent treatments was also investigated. The study showed that the application of FR treatments improved the reaction to fire of timber, even in the presence of previous preservative treatments. However, the choice of the specific FR treatment should take into account the substrate conditions. In addition, test results suggest that protection systems involving multi layers (intumescent and non-intumescent) with different functioning modes each are likely to have a good global performance on the protection of timber elements against fire.     

First Evidence of Collective Human Inhumation from the Cardial Neolithic (Cova Bonica,Barcelona, NE Iberian Peninsula)

Excavations at Cova Bonica (Barcelona, Spain) have revealed 98 human remains, grouped into five age clusters and corresponding to a minimum of six non-articulated individuals. The remains are clearly associated with Cardial pottery, lithic artifacts, and ornaments suggesting an Early Neolithic horizon. The radiocarbon dating of three human individuals provides a reliable attribution to this period, with a range between ca. 5470 and 5220 cal b.c., identifying it as one of the few assemblages of human remains directly dated from this period. These remains correspond to a rare collective human inhumation and join a growing body of samples from the Cardial Neolithic, which is providing some of the important sites for the study of population movement and the spread of Neolithization along the western Mediterranean coast.     

Technological continuity in Early Iron Age bronze metallurgy at the South-Western Iberian Peninsula – a sight from Castro dos Ratinhos

A collection of 54 bronze artefacts recovered from the inland settlement of Castro dos Ratinhos (Portugal) and belonging mainly to the 9th–8th centuries BC, was studied by the use of non-invasive and micro analytical techniques. EDXRF, Micro-EDXRF, SEM-EDS and Optical Microscopy were used to determine the alloy composition and to identify the different thermo mechanical operations applied in the production of the artefacts. Results show that the collection is entirely composed of good quality binary bronzes (with an average tin content of 10.1 ± 2.5%). Alloys with higher tin contents were kept in as-cast condition and used in the making of ornaments, while tools were often finished with forging and annealing operations. Despite the existence of some Orientalising features in the Castro dos Ratinhos, e.g. rectangular habitat structures, wheel-turned ware and amphorae, the exclusive use of binary alloys with a narrow range of tin content seems to be associated with an indigenous metallurgical tradition inherited from the Late Bronze Age. This may indicate that the Phoenician interaction within the inland indigenous communities was a slow and selective process, probably dependant on the social-economic and cultural development of local communities.     

Inclusion in Public Archeology in Brazil: Remarks on Collaborative Practices

There are several experiences of Public Archaeology in Brazil. In this paper, we will focus our attention on an experience developed by the Public Archeology Laboratory Paulo Duarte (LPA), located in the Center of Environmental Studies and Research (Nepam), University of Campinas, Brazil. Four main concepts have been used in this work: collaboration, inclusion, conflict, and subjectivity. We will develop the experiences between archaeologies and communities, and how these relations are linked with archaeological practice and interpretation.     

Lithic refitting and movement connections: the NW area of level TD10-1 at the Gran Dolina site (Sierra de Atapuerca,Burgos, Spain)

The first lithic refit studies were carried out at the end of 19th century, but the method was not considered an area of real interest to archaeology until quite recently. Today, lithic refitting is applied in a multitude of areas of enquiry including lithic technology, intra-site and inter-site spatial distribution, archaeostratigraphy and formation processes. In this paper, we present a refit study of the lithic materials recovered in the base of the NW sector of level TD10 at the site of Gran Dolina (Sierra de Atapuerca, Spain). We aim to provide information about spatial distribution through identifying activity areas and the internal connections between those areas. Our work resulted in various refits whose connections reveal the movements of the pieces and/or knappers that once occupied the site. Our results also show the importance of studying the set of materials as a whole and the bias involved in analyzing only a small sample. The refits, connections and directions of movement allow us to infer areas in which an activity took place, but these results must be confirmed in future works covering the entire lithic assemblage of TD10.     

An attempt to correct for the fading in million year old basaltic rocks

The use of feldspar for luminescence dating has been restricted because of anomalous fading. This has made its application to several important geological problems such as volcanic terrains difficult. Presently, two correction procedures are used to correct for anomalous fading. The present study tests these correction procedures using volcanic samples of known ages spanning the time period of 400 ka to 2.2 Ma. These correction procedures provided grossly underestimated ages (up to 60%). The possible causes for the underestimation are discussed.