Seismic Performance Assessment of Steel Frames with Shape Memory Alloy Connections,Part II – Probabilistic Seismic Demand Assessment

This article is the second of two companion articles that evaluate the seismic performance of steel moment-resisting frames with innovative beam-to-column connections that incorporate shape memory alloy (SMA) elements to enhance the energy dissipation characteristics of such frames. Building upon the finite element models of the three- and nine-story frames that were developed in the first article, the seismic demands on partially restrained frames with and without SMA elements are evaluated within a probabilistic framework. The results of this evaluation, expressed in the form of demand hazard curves, depict the effectiveness of the SMA connections in enhancing building performance over a range of demand levels. Martensitic SMA connections are most effective in controlling deformation demands on the frame from high levels of seismic intensity. In contrast, the recentering capability of superelastic SMA connections make them most suitable for reducing residual deformations in the structure, a reduction that is achieved at the expense of increased deformation demands during strong excitation. However, neither connection is uniformly beneficial at all hazard levels, suggesting that SMA systems must be tailored to the specific performance objectives for the building structural system.     

Assessment of Construction Techniques and Material Usage in İzmir Rural Houses

The domestic architecture in the rural villages of ?zmir comprises a unique built environment with their masonry wall textures, semi-open sofas, round tiled-hipped roofs, and chimneys, and represents an important part of the cultural and architectural heritage. This assessment is mainly based on field observations that focus on the architectural and structural layout of intact, damaged, and destroyed houses. During field observation and the analysis of data certain plan typologies and relationships between the geological formations of the region and choice of materials and construction techniques were observed. While load-bearing masonry and timber skeleton systems are common, extensive use of timber laces, stone, and fired or adobe brick masonry with mud mortar and timber frames infilled with masonry materials were frequently seen. Generally, round timber elements such as wall plates, laces, lintels, posts, and frames of flooring systems are used. Architectural degenerations in authentic houses, defective details and partially due to the earthquake-prone nature of the region seismicity have been evaluated. An overall approach for the preservation and sustainability of this heritage is suggested.     

Assessment of the Programme of Measures for Coastal Lagoon Environmental Restoration Using Cost–Benefit Analysis

The degradation of marine and coastal ecosystems has given rise to the creation of specific protection rules. The Marine Strategy Framework Directive and the Water Framework Directive are the standards agreed in the European Union with the aim of obtaining a good ecological status in marine and coastal waters by applying a programme of measures, if necessary. These measures must be technical, social and economically feasible, in such a way that costs do not exceed benefits. This work expounds the implementation of two economic tools to assess the programme of measures intended for the environmental restoration of one of the most important coastal ecosystems in Europe, the Mar Menor coastal lagoon (SE Spain). Thus, the cost–benefit analysis (CBA) (and its extensions) and the contingent valuation method are used to assess the aforementioned programme in terms of economic and environmental profitability. Results prove the socioeconomic and environmental profitability of the actions due to be undertaken, with rates of return of around 10%. From a methodological point of view, there is a clear need to widen the classic CBA scheme by using the extended CBA and the dual CBA to gauge this type of environmental restoration actions.     

Finnish Mosaic of Regional Innovation System—Assessment of Thematic Regional Innovation Platforms Based on Related Variety

The emphasis of Finnish innovation policy has very much been on promoting actions that can be labelled as science–technology–innovation mode of innovation, which is based on the production and use of codified scientific and technical knowledge. However, recent research has emphasized also the importance of more experienced-based mode of learning and innovation, which can be labelled as doing–using–interacting mode of innovation. This study is an attempt to shed light on the current development phase of Finnish innovation system facing the new paradigm. The Finnish innovation system is seen as a mosaic of regional innovation systems. The regional innovation systems are analysed through a developed framework including elements of theories of innovation systems and cluster theories as well as two recent national-level strategy documents. One of the main concepts of the study is related variety in regional innovation platforms. This study also aims at creating a pragmatic framework for describing related variety at the regional level by combining aspects from two theoretical frameworks. The empirical data were gathered in a series of workshops in all the Finnish regions during the year 2008. The result maps Finnish thematic regional innovation platforms fuelled by related variety.     

Assessment of risks on a territorial scale for archaeological sites in İzmir

This article focuses on natural, institutional, and human factors threatening archaeological sites. A methodology is developed for assessing risks to multiple assets on a territorial scale. The methodology consists of hazard assessment, vulnerability assessment, and risk assessment. Hazard assessment involves identifying hazard exposure areas and measuring the frequency and intensity of each hazard. Vulnerability assessment incorporates examining physical, managerial, and contextual vulnerabilities of structures and remains. Geographical information systems are utilised for producing hazard, vulnerability, and risk maps. An overall picture of risks for an entire territory allows decision-makers to make informed decisions at an upstream level to limit further degradation and ensure the preservation of archaeological assets. The methodology was tested by conducting a comprehensive study in ?zmir (Turkey), where 229 archaeological sites located in 21 metropolitan districts were studied. The proposed approach provides the promise of applicability across a range of historic environments.     

Damage Assessment of Unreinforced Stone Masonry Buildings After the 2010–2011 Canterbury Earthquakes

The sequence of earthquakes that has affected Christchurch and Canterbury since September 2010 has caused damage to a great number of buildings of all construction types. Following post-event damage surveys performed between April 2011 and June 2011, an inventory of the stone masonry buildings in Christchurch and surrounding areas was carried out in order to assemble a database containing the characteristic features of the building stock, as a basis for studying the vulnerability factors that might have influenced the seismic performance of the stone masonry building stock during the Canterbury earthquake sequence. The damage suffered by unreinforced stone masonry buildings is reported and different types of observed failures are described using a specific survey procedure currently in use in Italy. The observed performance of seismic retrofit interventions applied to stone masonry buildings is also described, as an understanding of the seismic response of these interventions is of fundamental importance for assessing the utility of such strengthening techniques when applied to unreinforced stone masonry structures.     

Exploit or Protect Airport Regions from Urbanization? Assessment of Land-use Restrictions in Amsterdam-Schiphol

Airports are no longer only places for take-off and landing, but increasingly became economic nodes in the urban development of metropolitan areas. Though it is debatable to what extent aviation growth is a cause or effect of economic growth, the reciprocal relationship cannot be denied. Most past developments near airports have been spontaneous and haphazard, but recently regional planners have increasingly included an airport focus. Airport planning aims to find a balance between exploitation of the economic potential and protecting the airport area from congestion and urbanization. This article examines the effects of land-use restriction policies near Amsterdam Airport Schiphol. Within the Schiphol area, only airport-related companies are allowed to establish their business near the airport. These policies have been implemented since 1987, but their success or failure was never evaluated in depth. For the first time empirical results show that land-use restriction policies could ban most of the undesired businesses near the airport. However, despite varieties of implementation and interpretation of the testing, few differences in effects are found. This study shows that airport-relatedness testing is a typically Dutch planning instrument, but can also be useful for other international airports.     

Vulnerability Assessment of Unreinforced Masonry Churches Following the 2010–2011 Canterbury Earthquake Sequence

The 2010–2011 Canterbury, New Zealand earthquake sequence caused extensive damage to unreinforced masonry churches. A sample of 80 affected buildings was analysed and their performance statistically interpreted. Structural behaviour is described in terms of mechanisms affecting the so-called macro-elements, and damage probability matrices are computed. Regression models correlating mean damage level against macroseismic intensity are also developed for all observed mechanisms, improving the initial simple-linear formulations through use of multiple-linear regressions accounting for vulnerability modifiers, whose influence is evaluated via statistical procedures. Results presented herein will support the future development of predictive tools for decision-makers, also contributing to seismic vulnerability mitigation at a territorial scale.     

Institutionally Induced Pendulum? An Assessment of State-level Influences on Post-war Australian Federal Voting

The extent of State-level influences on federal voting behaviour in Australia has been debated for many years. In this paper, I extend and improve on previous research by using the most advanced techniques (multilevel modelling) available for analysing survey data in this context, and present results based on an extensive investigation of post-war Australian elections. The results show conclusively that the overall extent of measurable State-level effects on federal voting over the period is relatively very small, despite the institutional significance of the States. In an attempt to reconcile these two facts, I therefore propose an institutional explanation of the small extent of State-level effects. I argue that the representation entitlements of the States in the House of Representatives would tend to result in the overall extent of State-level effects being relatively small because they introduce a self-correcting 'pendulum' element into party competition. I investigate some hypotheses that follow from this argument, demonstrate that the evidence from the multilevel modelling is consistent with these hypotheses, and conclude that this institutional element is a significant part of the explanation of the apparent unimportance of State-level influences.     

Assessment of innovation centres—methodological aspects and empirical evidence from Western and Eastern Germany

This study essentially pursues two goals. The first consists in investigating to what extent current methods of assessing the success of technology policies are applicable to the specific instrument of the innovation centre (IC). The deliberations made in this context are of an exploratory nature, since instruments specifically for the purpose of conducting regional economic analyses of the effectiveness of ICs have not yet been fully developed. Secondly, the methodological approach to a comprehensive empirical impact analysis of German ICs is discussed. A survey conducted to this effect by the Department of Economic Geography at the University of Hannover was recently concluded with an encouraging feedback. First results in the form of a comparison of East and West Germany are presented here.     

What Was Brewing in the Natufian? An Archaeological Assessment of Brewing Technology in the Epipaleolithic

It has long been speculated that increasing demands for cereals for the purposes of brewing beer led to domestication in the Near Eastern Natufian cultures. While the question of whether cereals were being used in beer production is an important issue, it has remained a difficult proposition to test. We present some new perspectives on traditional brewing techniques relevant to this issue, on archaeological remains, and on the paleoecology of the Near East. Taken together, these observations provide more compelling circumstantial evidence that makes it increasingly likely that brewing of beer was an important aspect of feasting and society in the Late Epipaleolithic.     

Erosion and Errors: Testing the Use of Repeated LIDAR Analyses and Erosion Modelling for the Assessment and Prediction of Erosion of Archaeological Sites?

Slope soil erosion is one of the main threats to archaeological sites. Several methods were applied to establish the erosion rates at archaeological sites. Digital elevation models (DEMs) from three different dates were used. We compared the elevations from these three models to estimate erosion. We also applied the landscape evolution model LAPSUS with the available DEMs as basis. Spatial processing errors and effects of tillage and harvesting practices explain most of the DEM elevation differences between the recordings. Increased DEM resolution does not result in more precise or reliable erosion. The present technological level of landscape evolution modelling makes it possible to indicate areas most vulnerable to soil displacement by surface runoff erosion and tillage. Future research, using sediment and surface dating techniques such as deposit of radionuclides, heavy metals and OSL dating will provide a more accurate estimation of erosion rates and the subsequent impact on archaeological sites.     

Accounting for Research: a Critical Assessment of English Heritage's Research Strategy and Agenda 2005–2010

Abstract

Social scientists and anthropologists have recently critiqued the proliferation of accountability practices, such as auditing and the creation of strategic documents, in a variety of working contexts across the globe. While practitioners in archaeology and the historic environment sector more broadly have been involved for some time in generating and implementing such documents and practices, there has been little direct discussion of why these came about or what roles they actually perform. This article addresses this omission by forefronting the recent English Heritage research strategy and Agenda 2005–2010 as objects for critical review. As well as assessing these documents in detail, it provides a broader consideration of the role of strategic practices such as these in archaeological research. While the documents under consideration are essentially English in scope, many of the points that are raised in relation to them have resonance at a wider, global scale.     

Advances in Polynesian Prehistory: A Review and Assessment of the Past Decade (1993–2004)

The pace of archaeological research in Polynesia has intensified in recent years, resulting in more than 500 new literature citations over the past decade. Fieldwork has continued in such previously well-studied archipelagoes as Tonga and Samoa in Western Polynesia, and Hawai’i and New Zealand in Eastern Polynesia, and has expanded into previously neglected islands including Niue, the Equatorial Islands, the Austral Islands, and Mangareva. The emergence of Ancestral Polynesian culture out of its Eastern Lapita predecessor is increasingly well understood, and the chronology of Polynesian dispersal and expansion into Eastern Polynesia has engaged several researchers. Aside from these fundamental issues of origins and chronology, major research themes over the past decade include (1) defining the nature, extent, and timing of long-distance interaction spheres, particularly in Eastern Polynesia; (2) the impacts of human colonization and settlement on island ecosystems; (3) variation in Polynesian economic systems and their transformations over time; and (4) sociopolitical change, especially as viewed through the lens of household or microscale archaeology. Also noteworthy is the rapidly evolving nature of interactions between archaeologists and native communities, a critical aspect of archaeological practice in the region.

An Assessment of the Role of an Open Shelter in Reducing Soiling and Microbial Growth on the Archaeological Site of the Bishop’s Palace,Witney, England

Two sets of twelve Portland limestone tablets were attached to carousels outside and under the open, lightweight shelter at Bishop’s Palace (Witney, England) for 18 months to assess the influence of shelters on soiling and microbiological growth on stone. At the start, and at 6-month intervals, tablets were analysed using microscopy (optical and SEM), colour measurement (spectrophotometry), weight change measurement and salt content determination (ion chromatography). Concentrations of NO₂ and SO₂ were also monitored for a month using diffusion tubes. In addition, results were compared with those obtained by the UK National Materials Exposure Programme (NMEP) on chemical weathering rates. Differences in soiling and biological growth on sheltered and unsheltered samples, and their influence on limestone decay were established. The shelter is likely to reduce biological growth by modifying the micro-environmental conditions. However, it may also exacerbate dust deposition, which might increase decay rates in the long-term.     

Seismic Performance Assessment of Steel Frames with Shape Memory Alloy Connections. Part I — Analysis and Seismic Demands

This article is the first of two companion articles that evaluate the seismic performance of steel moment-resisting frames with innovative beam-to-column connections that incorporate shape memory alloys (SMAs) to dissipate energy and provide recentering effectively during large earthquakes. Two types of SMA elements are considered: (1) superelastic SMA elements with recentering capability and (2) martensitic SMA elements with high energy dissipation capacity. This article describes the fundamental engineering characteristics of these SMA connections, their modeling in connections for nonlinear dynamic finite element analysis of building frames, and the validation of these connection models using data from full-scale experimental tests that were performed in previous research at Georgia Institute of Technology. Using three- and nine-story partially restrained (PR) moment frames selected as case studies from the SAC Phase II Project, nonlinear time history analyses of frames with and without SMA connections were conducted using suites of ground acceleration records. The beneficial effects of SMA connections on peak and residual deformation demands are quantified and discussed.     

Seismic Assessment of a Historical Masonry Building in Switzerland: The “Ancien Hôpital De Sion”

This article presents the results of the evaluation of the seismic safety of the Ancien Hôpital de Sion, an important Swiss architectural heritage building, situated in the Canton of Valais, the region with the highest seismic hazard in Switzerland. Three-dimensional Applied Element (AEM) modeling of the whole structure has been performed and validated. The adopted modeling strategy, together with nonlinear dynamic analysis, was able to represent the actual behavior and failure mechanisms typical of complex masonry structures, in addition to a good computational efficiency compared to other available numerical approaches. The local collapse mechanisms have been also studied through a kinematic limit analysis based on rigid block rotation. Both linear and nonlinear approaches have been followed together with the capacity spectrum method. The results provided by the different methodologies have been compared with the aim to provide possible insights concerning a general procedure for the assessment of the safety of such type of structures.     

The Role of Domestic and International External Cluster Linkages Explored on the Example of Buyer–Supplier Relations in Learning Regions: A Cross-Functional Assessment

This paper analyses three levels of interaction among firms: regional, domestic and international, the analysis relying on cross-functional supplier evaluations by their customers. The statistical analysis reveals that indeed three groups with different evaluation results can be distinguished. Contrary to expectations, though, regional suppliers were not better evaluated than domestic suppliers, while international suppliers scored weakest. Cross-functional differences in assessment were found, which urges researchers to collect cross-functional data for cluster assessment. We conclude that external linkages play an important role in understanding clusters and that the domestic level has to be taken into consideration of an analytical entity of its own.     

Navigating the al-ba?r al-mu?lim: an Assessment of the Investigation, Mitigation and Preservation of Morocco’s Maritime Cultural Heritage

Despite the Kingdom of Morocco??s extensive coastline and strategic position between the Mediterranean Sea and Atlantic Ocean, study of the region??s maritime history has been limited. Recent archaeological investigations, however, reveal the great promise of the physical remains and historical depth of the region??s maritime cultural heritage. As is the case with other countries in Africa, there are critical factors that adversely affect not only the exploration of this heritage, but also its recognition and preservation. Against this background, the Oued Loukkos Survey was developed in order to mitigate such critical factors at the site of Lixus (Larache) by implementing a cross-disciplinary methodology and cooperation between several Moroccan and foreign institutions. As Morocco recently ratified the UNESCO 2001 Convention on the Protection of the Underwater Cultural Heritage, a more comprehensive legal framework is now in place alongside existing national legislation for such mitigation practices to be enacted on a broader scale.