Multi-temporal archaeological analyses of alluvial landscapes using the photogrammetric restitution of historical flights: a case study of Medellin (Badajoz,Spain)

One of the main challenges affecting the archaeological study of alluvial landscapes is the intensity of change these environments experience over time. Quick and dramatic alterations in geomorphological dynamics and land exploitation determine the visibility and conservation of the archaeological record. This study proposes an approach to the problem of studying these evolving environments based on the analysis and treatment of a series aerial photographs taken between the 1950s and the present day. This paper is particularly interested in looking at the process of photogrammetric restitution and in validating and comparing the digital terrain models and orthoimages produced. The quantitative analysis and visual interpretation of these results can provide valuable information about the transformation of landscapes and factors affecting surface evidence. The intended final result is to develop the ability to map the most problematic or best preserved areas. Nevertheless, it is considered in terms of a relative measure of change magnitude, rather than trying to provide absolute figures.     

The Camera “at the Trowel’s Edge”: Personal Video Recording in Archaeological Research

Video recording is increasingly becoming a favourable medium in archaeological research, particularly as an unconventional documentation tool that captures the elusive processes of ongoing interpretation in an audiovisual format. Our research forms part of the Personal Architectonics Through INteraction with Artefacts (PATINA) project, a project focused on the design of technologies for supporting research. Archaeological fieldwork is one of the research environments being studied by the project, and one of our primary concerns was to observe and record current research practices in the wild and to examine the influence of new technologies on those practices. This research brings together well-established and advanced observation techniques used in social sciences and computing fields such as human–computer interaction with archaeological research and presents the deployment of an off-the-shelf wearable camcorder as a recording interface in archaeological fieldwork. The article discusses the user evaluation methodology and the results, while addressing long-standing and timely theoretical discussions on the role of video recording in archaeological research.     

Mesh Is More—Using All Geometric Dimensions for the Archaeological Analysis and Interpretative Mapping of 3D Surfaces

In various disciplines, particularly those that utilise techniques developed in the geosciences, the display, analysis and interpretation of three-dimensional (3D) data is very important. This is also the case in archaeology. Irrespective of a site- or landscape-centred point of focus, archaeology deals with very complex surfaces and always examines traces of past human presence in three geometrical dimensions. Visualising these detailed geometric environments is not that much of an issue anymore; however, interactively interpreting and mapping them is still problematic. Despite the steady increase in technologies to create 3D models, there is still a serious lack of tools that allow for easy interaction with these models in a metrical and coordinate system-aware environment. As a result, most—if not all—interpretation workflows will first downscale 3D data to two-and-a-half-dimensional (2.5D) or 2D data sets, thus effectively discarding up to one geometrical dimension. To enable or enhance the perception of topographic characteristics in these geometrically compromised datasets, various visualisation techniques have been developed to artificially restore and enhance the data that was initially discarded. While these techniques work very well to enhance the remaining pertinent features present in such data sets, data downscaling can nevertheless irrevocably eliminate significant amounts of important archaeological information. Therefore, this paper outlines a new processing and interpretation pipeline for complex archaeological 3D surfaces that do not rely on downscaling of data, while also discussing several 3D-related concepts and issues along the way. More specifically, this article focusses on the generation of intelligently decimated, two-manifold triangular meshes and the subsequent geo-referenced 3D interpretative mapping of these surfaces. Furthermore, all applications can be considered low- and even no-cost, making this a readily implemented processing and interpretation workflow. Additionally, all software packages are easy to learn and flexible enough for implementation in any existing mixed software pipeline.     

Three-dimensional visibility analysis of architectural spaces: iconography and visibility of the wall paintings of Xeste 3 (Late Bronze Age Akrotiri)

In recent years various methods of visibility analysis have been applied to investigate human engagement, experience and socialisation within historic and prehistoric ’natural’ and built environments. On many occasions these approaches appear to be either extremely limited or wholly inadequate for the interpretation of complex built structures and building interiors because they do not fully model the three-dimensional geometry of such spaces. This paper briefly reviews computational approaches to visual analysis that have been previously applied in archaeological research, and then goes on to introduce a new analytical technique that uses fully 3D reconstructions of past environments. This method integrates common functionalities of 3D modelling software and Geographic Information Systems (GIS), essentially permitting viewshed analysis to be performed upon objects of any form and shape modelled in 3D. We argue that the proposed methodology can generate new data and encourage fresh lines of enquiry in the study of extant and partially preserved historic and prehistoric built structures in a variety of contexts, ranging from building interiors and townscapes to landscapes. The potential of the method is illustrated by applying the suggested analysis to explore visual perception issues associated with the urban remains of Late Bronze Age Akrotiri (Thera, Greece).     

中国古代青铜器凝固过程的数值模拟及其相关工艺问题研究

本研究引入金属材料科学中成熟的凝固理论,对中国古代青铜器的铸造工艺进行系统研究,发现我国古代青铜器的凝固均属于非平衡凝固。基于这一认知,用ProCAST软件进行青铜合金凝固过程的仿真模拟,在动态可视的层面观察其凝固过程与铸造缺陷位置,进而探索其缺陷形成原因及工匠的处理机制。本研究总结出了我国古代青铜器凝固的4个关键要素——原料制备、温度控制、凝固时间与缺陷机理。基于现代凝固理论的模拟方法的引入,能够用一种全新的可视化、可计算的仿真技术研究我国古代青铜器的铸造工艺,为科学解读我国古代青铜器铸造工艺内涵、反映我国古代金属技术成就提供了重要的数据支撑。     

More than Meets the Eyes?: Archaeology Under Water,Technology, and Interpretation

Abstract

Archaeology has had a long and interesting relationship with technology. Technology has arguably allowed us to move from antiquarian interest to the robust academic institution that we now are. The importance that technology plays within archaeology is perhaps best exemplified within the increasingly popular/populist 'sub-discipline' of underwater archaeology. After all, contemporary underwater archaeology could not exist if it was not for the invention SCUBA. Alongside the 'day-to-day' use of technology there is also a rush to latch on contemporary technologies within the sub-discipline. The reasons for this are examined within this work, however, what is argued to be more important is the implications this has had on our discipline.

This paper examines these implications on and as part of underwater archaeology. The impact of its use on interpretive thinking within the sub-discipline are analyzed by assessing the very nature of theoretical thinking within our work. This paper raises the difficult and perhaps controversial question — are underwater archaeologists merely substituting technology for theory and as such offering, admittedly impressive, complex and sound scientific computer models as interpretation, rather than the data that they really are?     

When Survey Goes East: Field Survey Methodologies and Analytical Frameworks in a Central Asian Context

This paper investigates the applicability and transferability of conventional frameworks of archaeological survey in the context of marginal alluvial environments, particularly the unique inland deltas of Central Asia. These dynamic and visually obstructed landscapes pose unique challenges not only to survey methodologies but also to theory and interpretation. Here, an exploratory approach to data analysis is used that applies three distinct yet integrated methodologies: visibility analysis, multi-scalar spatial analysis and directional (anisotropic) statistics. This approach thereby moves beyond many of the existing conceptual constraints about how we understand surface distributions in arid alluvial landscapes and ultimately identifies both transferable analytical methods and new fieldwork agendas that are relevant to a wide range of survey projects.     

Immigrant businesses,place-making,and community development: a case from an emerging immigrant gateway

Immigrant businesses have become an increasingly important component in the US economy. However, very few studies have systematically examined the role of immigrant businesses in community development, except for some cases in established immigrant gateways such as New York and Miami. In this study, we explore how immigrant businesses are shaping physical, cultural, social, economic, and political landscapes in their local communities in the emerging immigrant gateway of Charlotte, North Carolina. Focusing on the case of a multiethnic retail corridor, we find that, as active place-makers, immigrant businesses have transformed deteriorating and abandoned street fronts into vibrant and well-frequented urban environments conducive for further development. Through a systematic approach to understanding the place-making process of immigrant businesses, findings from this study call for more in-depth integration of immigrant and ethnic economies in local policies and planning strategies for neighborhood revitalization. These findings are particularly pertinent in the context of the continuous ethnic diversification of our neighborhoods and cities.     

Our Heritage – Our Future

Abstract

Much of our present technology can be traced to the great discoveries at the beginning of our century, particularly relativity and quantum mechanics. This is our heritage. Based on these, reasonable extrapolations can be made for our future, and are here exemplified by microelectronics, lasers, molecular biology, new material, aviation and nuclear energy. But often the unexpected development is the most important, here compared with non-linear equations in mathematics. Man's great future will arise from such non-linearities and the space telescope may bring a new field theory, redundancy in computers may give us thinking machines and finally the discovery – or the proof of absence – of extra-terrestrial life will bring the greatest of all non-linear changes. It is concluded that human imagination is unlimited, that imagination lets man grow to transcend his limits and to fulfil his dreams.     

Built environment and tourism as road safety determinants in Benidorm (Spain)

The rise in the number of urban road accidents is a challenge shared by all European cities, which seek to improve mobility while reducing transport problems. In recent years, urban road accidents in Spain have been constantly increasing and now account for a larger share of the total number of road accidents. This paper aims to analyse the impact of urban factors on road accidents. For this purpose, a small-scale analysis of land use and road infrastructure has been conducted in the town of Benidorm, one of the main tourist destinations in Spain. In addition, a regression analysis has been carried out using a Negative Binomial distribution. The results show that factors such as the level of mixed land uses, population density and road infrastructure are related to urban road accidents. The findings also reveal that tourism environments have a positive impact on pedestrian road safety. Small-scale analyses, particularly those related to exclusively-oriented environments, such as tourism developments, should be studied in detail in order to promote safety, liveability and sustainability in our cities.     

On the frontier of the Western Shire,British Central Africa

Superficial deposits (residual, colluvial, alluvial) are important as environmental resources in tropical environments. An understanding of their formation through varying time periods is essential to a correct interpretation of their economic and hazard potentials. This requires an integration of process studies with a reconstruction of longer term development. Saprolite formation is considered over 10⁵‐10⁷ yr, while colluvial and alluvial sediments are commonly Late Quaternary (10³‐10⁵ yr) in age. The importance of Quaternary environmental changes in the humid tropics to an understanding of heavy mineral placer deposits in West Africa and Indonesia is illustrated. It is concluded that geomorphologists can often make their most important contributions to developing areas by offering a sound interpretation of landsurfaces and their underlying deposits for engineers, geologists and pedologists, with whom a close working relationship is essential.     

The Importance of Multiple 14C Dates from Significant Archaeological Contexts

Radiocarbon (¹⁴C) dates are the most important means for determining the age of Holocene archaeological deposits. The theoretical physical basis of this method is by now unassailable, having been consistently tested and refined over two generations. However, the means by which this method has been applied and the interpretation of these results remain as key issues, particularly for complex archaeological discoveries that substantially affect our understanding of world prehistory and social evolution. Many factors can produce uncertainty or variation in the ¹⁴C concentrations of samples, even those that have been selected from the same archaeological context or event. A number of recent studies have also addressed the ways in which ambiguities and irregularities in the ¹⁴C calibration curve can affect the interpretation of archaeological dates and temporal patterns. Of greatest concern, however, is a growing practice of using only one or two samples to date a significant prehistoric context or event. The date of these events, usually relative to other human activities, often holds important theoretical implications for evolutionary anthropology and related disciplines. In this article, we demonstrate that such a practice is rarely adequate or acceptable. Rather, proper procedure requires a suite of dates that permit statistical verification that the deposit or event itself is being correctly dated. We present a detailed case study that highlights the importance of analyzing multiple samples of ¹⁴C from significant archaeological contexts.     

从视觉史料到文学图像——文学史的图像学研究刍议

发掘图像的文学史意义成为文学史研究取得突破的重要途径。图像的文学史意义主要表现为两方面:一、文献学意义上的视觉史料,图像作为印证相关社会历史知识的可视证据;二、阐释学意义上的视觉文本,图像作为文学的视觉化形态,成为文学史的基本构成之一。文学图像成为重新理解和阐释文学史的重要视角。图文互释是图像的文学史意义更为本质的体现。     

THE OBSIDIAN IN THE AEGEAN BEYOND MELOS: AN OUTLOOK FROM YALI

Summary.   Obsidian is an important material circulated throughout the Aegean. Melian obsidian is found at many sites and researchers have concentrated on Melos without acknowledging obsidian from other sources. This article endeavours to highlight obsidian of non-Melian origin, such as that from the Carpathians, central Anatolia, Antiparos and, particularly, Yali. It is demonstrated that this latter source was a central one for certain islands, with its obsidian found at a number of sites in the Dodecanese and beyond. It is also emphasized that there were circulation modes of obsidian parallel to that of Melos, as well as different procurement conditions. Therefore, by including important regional sources such as Yali in the obsidian discourse, our understanding of obsidian exchange and circulation is enriched.     

Some Popular Superstitions of the Ancients

This article provides an introductory discussion of the ways in which popular perceptions of artworks, artists, and the creative process have generated a repertoire of recurring motifs. Sometimes reinforced by art historical research and documentary evidence and sometimes at variance with all such scholarship, the tropes of ‘artlore’ constitute a catalogue of persistent story types that spring from visual interpretation experienced within a shifting cultural context.     

Processes of Formation and Alteration of Archaeological Fire Structures: Complexity Viewed in the Light of Experimental Approaches

The aim of this article is to present an experimental approach for studying the formation and transformation processes of archaeological fire structures. We present a synthetic review of our experimental project, which was developed in many different natural archaeological contexts. We report the results and problems associated with experimental fires lit on different kinds of soils and in different environments, followed by the observation of natural and anthropic transformations. Finally, we analyse the nature and significance of these results for the archaeological interpretation process, while describing some general trends and showing the complexity of the approach.     

Technology-nonhuman-child assemblages: reconceptualising rural childhood roaming

This paper argues for reconceptualising how children use technology ‘outdoors’ as a technology-nonhuman-child assemblage, or roaming pathway. Founded in contemporary fears about children’s reduced opportunities to access nature and roam in rural environments, in part due to the ubiquitous presence of technology in their lives, we instead illustrate how the agencies of technologies and plants are folded into children’s outdoor roaming. Combining visual methods, video analysis and qualitative geovisualisation, and in collaboration with the Brecon Beacons National Park Authority, this paper exposes how assemblages are contingently brought into being through the actions of what technologies, plants and children do together. We demonstrate how the agentic capacities of non-humans and technologies are assembled through children’s imaginative interaction with them, and how these imaginative interactions make such agencies visible.     

基于专利地图的旅游业专利研究

旅游业专利技术是衡量旅游业技术创新的重要指标,本文利用专利地图理论和方法,直观展示旅游业专利的总体趋势、技术生命周期、国际专利分类,并深入挖掘旅游业专利信息。     

Teaching visualised geographies: towards a methodology for the interpretation of visual materials

Abstract

This paper suggests a number of questions which can be used to structure a small‐group discussion about the interpretation of visual images. As many geographers now are demonstrating, geographical knowledges are very often visualised. However, there is currently little on offer methodologically to help students approach the interpretation of visual images critically. This paper hopes to start to remedy this situation. It begins by sketching a theoretical understanding of the meanings of visual images. It then suggests a number of questions that flow from that understanding, which can be addressed to a particular visual image in order to facilitate a discussion about its possible meanings.