Investigations into the Control of Biofilm Damage with Relevance to Built Heritage (BIODAM)

This publication describes the results of a 3 year EC-funded R&D project (BIODAM) which investigated the effects of biological colonisation on heritage surfaces and evaluated of novel, low toxicity treatments for their ability to control of biofilms and for their compatibility with conservation products.

An Integrated Toolkit for the Conservation of Stone-Built Heritage

Rapid in situ diagnosis of damage is a key issue in the preservation of stone-built cultural heritage. This is evident in the increasing number of congresses, workshops and publications dealing with this issue. With this increased activity has come, however, the realisation that for many culturally significant artefacts it is not possible either to remove samples for analysis or to affix surface markers for measurement. It is for this reason that there has been a growth of interest in non-destructive and minimally invasive techniques for characterising internal and external stone condition. With this interest has come the realisation that no single technique can adequately encompass the wide variety of parameters to be assessed or provide the range of information required to identify appropriate conservation. In this paper we describe a strategy to address these problems through the development of an integrated `tool kit' of measurement and analytical techniques aimed specifically at linking object-specific research to appropriate intervention. The strategy is based initially upon the acquisition of accurate three-dimensional models of stone-built heritage at different scales using a combination of millimetre accurate LiDAR and sub-millimetre accurate Object Scanning that can be exported into a GIS or directly into CAD. These are currently used to overlay information on stone characteristics obtained through a combination of Ground Penetrating Radar, Surface Permeametry, Colorimetry and X-ray Fluorescence, but the possibility exists for adding to this array of techniques as appropriate. In addition to the integrated three-dimensional data array provided by superimposition upon Digital Terrain Models, there is the capability of accurate re-measurement to show patterns of surface loss and changes in material condition over time. Thus it is possible to both record and base-line condition and to identify areas that require either preventive maintenance or more significant pre-emptive intervention. In pursuit of these goals the authors are developing, through a UK Government supported collaboration between University Researchers and Conservation Architects, commercially viable protocols for damage diagnosis, condition monitoring and eventually mechanisms for prioritizing repairs to stone-built heritage. The understanding is, however, that such strategies are not age-constrained and can ultimately be applied to structures of any age.

Land use history of Village Bay, Hirta, St Kilda World Heritage Site:A palynological investigation of plaggen soils

This paper presents findings based on a palynological investigation of artificially accreting (plaggen) soils from the settlement of Village Bay, Hirta, in the St Kilda archipelago, which was perhaps the most distant and inhospitable outpost of sustained human habitation in the British Isles. The soils were developed principally through the addition of turf ash and seabird waste, although some ash may have been derived from upland peats. It is assumed that the woodland pollen signal (much lower in the soils than in an upland peat site nearby) represents off-island sources. Corylus avellana-type pollen (frequent in upland sites), along with Potentilla-type, may provide markers in the Village Bay profiles for the addition of ashed hillside turf, and possibly peat, to the plaggen soils. Cereal-type pollen is well represented through the profiles and is often strongly associated with the record for Chrysanthemum segetum (corn marigold), a frequent indicator of arable land. The Brassicaceae signal may partly reflect the cultivation of cabbages; Chelidonium majus (greater celandine) may have been grown for medicinal use. Soil mixing has rendered radiocarbon dating meaningless at this site, but the establishment of a change in cultivation regime before AD 1830 may have been identified from the patterns of pollen concentration and preservation in the profiles. © 2008 Elsevier B.V. All rights reserved.

The Aran jumper: Crafting a Transatlantic Heritage

The garment we now recognise as the Aran jumper emerged as an international symbol of Ireland from the twin twentieth century transatlantic flows of migration and tourism. Its power as a heritage object derives from: 1) the myth commonly associated with the object, in which the corpse of a drowned fisherman is identified and claimed by his family due to the stitch patterns of his jumper (Pádraig Ó Síochain 1962; Annette Lynch and Mitchell Strauss 2014); 2) the meanings attached to those stitch patterns, which have been read, for example, as genealogical records, representations of the natural landscape and references to Christian and pre-Christian ‘Celtic’ religion (Heinz Kiewe 1967; Catherine Nash 1996); and 3) booming popular interest in textile heritage on both sides of the Atlantic, fed by the reframing of domestic crafts such as knitting as privileged leisure pursuits (Rachel Maines 2009; Jo Turney 2009). The myth of the drowned fisherman plays into transatlantic migration narratives of loss and reclamation, promising a shared heritage that needs only to be decoded. The idea of the garment’s surface acting as text (or map) situates it within a preliterate idyll of romantic primitivism, while obscuring the circumstances of its manufacture. The contemporary resurgence in home textile production as recreation, mediated through transnational online networks, creates new markets for heritage textile products while attracting critical attention to the processes through which such objects, and mythologies, are produced. The Aran jumper’s associations with kinship, domesticity and national character make it a powerful tool in the promotion of ancestral (or genealogical) tourism, through marketing efforts such as The Gathering 2013. Nash’s (2010; 2014) work demonstrates the potential for such touristic encounters to disrupt and enrich public conceptions of heritage, belonging and relatedness. While the Aran jumper has been used to commodify a simplistic sense of mutuality between Ireland and north America, it carries complex transatlantic messages in both directions.

Time-lapse Monitoring of the Slopes of a Heritage Earthwork by Means of Near-surface Seismic Techniques

A significant portion of UK’s infrastructures earthworks was built more than 100 years ago, without modern construction standards: poor maintenance and the change of precipitations pattern experienced in the past decades are currently compromising their stability, leading to an increasing number of failures. To address the need for a reliable and time-efficient monitoring of earthworks at risk of failure we propose here the use of two established seismic techniques for the characterization of the near surface, MASW and P-wave refraction. We have regularly collected MASW and P-wave refraction data, from March 2014 to February 2015, along 4 reduced-scale seismic lines located on the flanks of a heritage railway embankment located in Broadway, SW of England. We have observed a definite temporal variability in terms of phase velocities of SW dispersion curves and of P-wave travel times. The accurate choice of ad-hoc inversion strategies has allowed to reconstruct reliable VP and VS models through which it is potentially possible to track the temporal variations of geo-mechanical properties of the embankment slopes. The variability over time of seismic data and seismic velocities seems to correlate well with rainfall data recorded in the days immediately preceding the date of acquisition.

Display At Your Own Risk: An experimental exhibition of digital cultural heritage

Display At Your Own Risk is a research-led exhibition experiment concerned with the use and reuse of digital surrogates of public domain works of art produced by cultural heritage institutions of international repute. This publication is issued in conjunction with the open source exhibition, available at: displayatyourownrisk.org.

“Who controls the past? An investigation into the role of heritage interventions in post-conflict nation narration”

Poster presentation

“Who controls the past? An investigation into the role of heritage interventions in post-conflict nation narration in the former Yugoslavia”

Urban Conflicts: Ethno-national divisions, States and Cities conference

Heritage and nation narration in contested societies

The targeted destruction of heritage sites in recent conflicts in Syria, Iraq and Mali has tragically illustrated how the treatment of heritage, as the tangible manifestation of the identity of the ‘other’, can be a symptom of the nadir to which group relations can descend. In a world in which the nation-state remains the primary means of identification, the following overarching research question was investigated: How do nation-states narrate their pasts in the built form? Drawing upon the conceptualisation of heritage as a present-orientated and political construct that is utilised to represent the values of the “dominant political, social, religious or ethnic groups” (Graham, Ashworth & Tunbridge 2000: p.183), this paper discusses the role that heritage interventions can play in both emphasising gulfs and building bridges in divided post-conflict societies (Fojut 2009).