Evaluating the Potential of Semi-Automated Image Analysis for Delimiting Soil and Sediment Layers

ABSTRACT

Established methods for delineating anthropogenic and natural strata during fieldwork are based on the visual and tactile perception of excavators. Modern image analysis techniques can help to ensure objectivity and reproducibility when documenting sections and plana. Within this study we examine the unsupervised classification of digital images as a technique for delimiting layers and identifying stratigraphic features. Assessing the potential of this approach, we exemplarily captured soil profiles with high-contrast stratigraphy, located in the area of a historical vineyard (Brandenburg, Germany). Reproducible analyses were carried out using open-source software, allowing for the future advancement of the methodology utilized and providing a basis for the analysis of more complex stratigraphic sequences. We compare clustering results of high-resolution RGB and hyperspectral images (470–830?nm, 37 bands). Multiple pre-processing and processing steps are carried out to evaluate their influence. Our results render the semi-automatic analysis of RGB images helpful for stratigraphic interpretation.     

Opening up the Compendium: An Evaluation of International Comparative Planning Research Methodologies

It is two decades since the European Compendium of Spatial Planning Systems and Policies was conceived. Since its publication in 1997, the Compendium has become a widely cited reference in comparative planning literature.¹ It remains one of the few comprehensive reviews of spatial planning policy and practice across western Europe. The Compendium also represents one of the few studies to develop a typology for distinguishing between national planning systems. A number of comparative research studies on spatial planning have since built on the methodological foundations laid by the Compendium although its typology of national planning systems is not always used or interpreted as originally intended for a variety of reasons. In the context of extensive reform of planning approaches in Europe, the paper examines what can be learned about methodologies for international comparative research in planning based on the experience of the Compendium study and subsequent major comparative planning studies. We conclude that while broad typologies remain useful in explaining general trends, they may hide as much as they reveal. Future studies should widen the criteria used to build ideal types beyond formal characteristics in order to address planning in practice.     

L’épistémologie Transversale D’ettore Majorana

« Il valore delle leggi statistiche nella fisica e nelle scienze sociali » is Ettore Majorana’s only work on science. It offers a critique of classical determinism, establishing an analogy between the laws of quantum mechanics and social science and arguing that both are intrinsically linked to probability. This article first studies this argument from the standpoing of metaphysics, physics, and sociology, and then assesses the significance of this transversal epistemology.     

Games on the seashore of Salalah: the discovery of mancala games in Dhofar,Sultanate of Oman

During the 2013 fieldwork of the French archaeological mission along the shores of the Arabian Sea, mancala games were discovered on the seashore of Salalah at the site of Ad‐Dahariz. They are cup‐hole carvings made directly into rock slabs and distributed in six distinct zones of the site. They usually consist of fourteen cup‐holes aligned in two lines of seven, two supplementary holes being sometimes present on each side. They are the first of their kind in South Arabia and can be compared to similar configurations of carved games elsewhere in Arabia, such as at Jebel al‐Jassasiya, Qatar. This paper presents the potential origins of this game in the region, as well as a plausible dating of their use.