Radiographic examination of Western bronze and stone sculptures: history of studies, methodologies and data interpretation

过去五十多年里,在对意大利的石雕和大型青铜雕塑进行保护时,各种跨学科的深度评估方法得到了建立。在此框架内,射线照相检测技术取得了进步。射线照相术作为一种无损的研究手段,可以从宏观层面对艺术作品进行考察,在文物评估中一直发挥着核心作用。在检测阶段,射线照相术既可以被用来重构古代艺术工艺和流程,也可以被用来评估文物的机械和结构信息。本文介绍了射线照相术的研究历史及其不同方法,比如中能X射线的使用、高能X射线的应用(线性加速器)、伽马放射性同位素源的使用(伽马射线照相术)。本文描述了射线照相术在石质和青铜雕塑上的重要应用案例,其中对马可·奥勒留骑马像的研究就是一个典型。本文还描述了“高能X射线”的首次应用,该技术被用来检测奥维多大教堂的圣母子、两组天使和一个青铜天篷雕塑。文章的结论部分定义了正确解释数据结果的必要标准,特别是在通过射线照相检测技术探究青铜雕塑检测信息和铸造工艺的相关性时,应该考虑到铸造缺陷和不连续性。     

New tools for rock art modelling: automated sensor integration in Pindal Cave

This paper presents the integration of automated sensors based on a terrestrial laser scanner and an amateur digital camera with the aim of generating a photorealistic three-dimensional (3D) model of the Principal Panel in Pindal Cave (Spain). The approach developed for 3D modelling overcomes many of the problems related to the independent implementation of photogrammetry and laser scanning. Particularly, a sequential and hierarchical approach was developed based on the processing and matching of images from the camera (camera image) and the laser scanner (range image). The results obtained demonstrate that the workflow for this model is automatic, effective, and accurate. The presented approach was found to create hyper-realistic models, even improving upon human visual capabilities.     

The Groin Vaults of St. John Hospital in Jerusalem: An Experimental Analysis on a Scale Model

The St. John Hospital is part of a larger complex of buildings known as the Hospitallers Quarter, located south of the Holy Sepulchre in Jerusalem. At present, the hospital looks like an irregular volume both in height and in plan; it is covered by ten groin vaults resting on very stocky pillars. Each vault is formed by intersecting double curvature surfaces. In order to verify the effectiveness of continuous carbon fiber reinforced polymer sheets reinforcement, bonded at the extrados of vaults, laboratory tests were carried out on a 1:5 scale model, built with materials and construction techniques similar to those of the real building. Experimental tests were performed on the unstrengthened and strengthened vault. The experimental results shown that the strengthening system is able to increase the collapse load of the vault, without substantial variation of the initial stiffness.     

Green infrastructure under pressure. A global narrative between regional vision and local implementation

This paper focuses on green infrastructure planning in three different regions, namely, the Ruhr in Germany, the Capital Region of Denmark and Greater Manchester in the UK. We investigate planning cultural research heuristics and propose a conceptual refinement of existing planning cultural research and approaches. We use framing and storytelling to show how societal beliefs and cultural assumptions are consolidated as spatial frameworks that guide planning practice. Theories of spatial governance describe how spatial frames are mediated, accepted and changed through institutionalized structures. We present arguments from urban design and implementation research to illustrate how planning ideas materialize. The empirical material presented in this paper shows how cultures of green infrastructure planning operate in diverse spatial contexts and that a dynamic perspective is useful for understanding how planning cultures develop and change over time.     

‘Are We Ready?’: Belgium and the Entente’s Military Planning for a War Against Germany, 1906–1914

Abstract

While historians have consistently focused on the development of German, French, and British planning in the years preceding the Great War, few have truly acknowledged neutral Belgium’s role in defining the strategic paradigm of 1914. Belgium held the strategic key to the opening salvos of a future Franco-German war, and each of its Guarantors were determined to obtain the initiative. While German planners were prepared to seize it by force, the Entente (particularly Britain), remained wary of its obligations. Instead, Britain sought to determine Belgian intentions and capabilities through secret and unbinding staff conversations in 1906 and 1912. The former proved useful in establishing a framework for co-operation but ultimately came to nothing. By the time they were resumed in 1912, Anglo-Belgian diplomatic relations had soured, while Belgium’s military reforms and its emergence as a colonial power gave it a renewed sense of confidence. Belgian officials were determined to retain the kingdom’s agency in the formulation of its defence policy and resented Entente suggestions of pre-emptive action. Neutrality was subordinated to independence, which itself could not be guaranteed were Belgium to conclude even the loosest of military accords. Consequently, Entente plans were forced surrender the strategic initiative to the Germans.     

Use of Pushover Analysis for Predicting Seismic Response of Irregular Buildings: A Case Study

Structural irregularity undermines capability of conventional methods for 2D pushover analysis to closely approximate results from inelastic dynamic analysis. In recent years, different methods have been developed to overcome such limitation and their suitability has been checked with reference either to idealized building models or to geometrically simple tested structures. In this paper, suitability of one such method, proposed by Fajfar et al. [2005] Fajfar, P., Maru?i?, D. and Perus, I. 2005. Torsional effects in the pushover-based seismic analysis of buildings. Journal of Earthquake Engineering, 9(6): 831–854. [Taylor & Francis Online], [Web of Science ®] , [Google Scholar], is evaluated considering an existing school building which presents both vertical and plan irregularities. Types of irregularity encompass not only those usually considered by seismic codes but also those deriving from a bad conceptual design and construction inaccuracies, very frequent at the year of construction (1974). It is found that, even under such complex irregularity conditions, this ‘modified’ pushover analysis correlates well results from inelastic dynamic analysis almost up to failure, since, in most cases, its predictions of interstorey drifts and plastic rotations are conservatively close to values from inelastic dynamic analysis. Even failure mechanism, consisting of a floor mechanism at the third level, is correctly predicted, thus demonstrating adequacy of such method for actual framed structures.     

Manners of the market place

William G. Davis. Social Relations in a Philippine Market: Self‐interest and Subjectivity. Berkeley and Los Angeles: University of California Press, 1973. xiii + 315 pp. Appendixes, bibliography and index. $12.50.