102 research outputs found
Earthquake‐Induced Liquefaction in the Northeastern United States: Historical Effects and Geological Constraints
No full textThe Contribution of Palaeoseismology to Seismic Hazard Assessment in Site Evaluation for Nuclear Installations
Get PDFIn the framework of site evaluation/re-evaluation procedures for nuclear power plants and other nuclear installations, this publication aims at encouraging and supporting Member States, especially from newcomer countries, to include paleoseismic investigations into the geologic database. In fact, paleoseismology is not just a crucial discipline for Fault Displacement Hazard Assessment (FDHA) but also an indispensable tool for Seismic Hazard Assessment (SHA), as recommended in the reference IAEA Safety Guide (IAEA SSG-9 [1]). Within this scope, this document provides an updated review of the state of the art of paleoseismology, integrated with practical recommendations addressed to Member States, aiming to emphasize the value of earthquake geology studies for nuclear safety. Paleoseismic investigations in the context of site evaluation of nuclear installations, as described in the IAEA SSG-9 [1], have the following main objectives: •Identification of seismogenic structures based on the recognition of effects of past earthquakes in the region; •Improvement of the completeness of earthquake catalogs, through the identification and dating of ancient moderate to large earthquakes, whose trace has been preserved in the geologic record; •Estimation of the maximum seismic potential associated with an identified seismogenic structure/source, typically on the basis of the amount of displacement per event (evaluable in paleoseismic trenches), as well as of the geomorphic and stratigraphic features interpretable as the cumulative effect of repeated large seismic events (concept of ‘seismic landscape’); •Rough calibration of probabilistic seismic hazard assessment (PSHA), by using the recurrence interval of large earthquakes detectable by paleoseismic investigations, and providing a ‘reality check’ based on direct observations of earthquake environmental effects
Digital Tectonics as a Morphogenetic Process
Get PDFp. 938-948Tectonics is a seminal concept that defines the nature of the relationship between
architecture and its structural properties. The changing definition of the symbiotic
relationship between structural engineering and architectural design may be considered one of the formative influences on the conceptual evolution of tectonics in different historical periods. Recent developments in the field of morphogenesis, digital media, theories techniques and methods of digital design have contributed a new models of integration between structure, material and form in digital tectonics.
The objective of this paper is to propose and define tectonics as a model of morphogenetic process. The paper identifies and presents the manner in which theory and emerging concepts of morphogenesis as well as digital models of design are contributing to this new model. The paper first analyzes the historical evolution of tectonics as a concept and characterizes the emergence of theoretical framework reflected in concepts and terms related to morphogenesis.Oxman, R. (2010). Digital Tectonics as a Morphogenetic Process. Editorial Universitat Politècnica de València. https://riunet.upv.es/handle/10251/695
Paleoliquefaction Studies and the Evaluation of Seismic Hazard
No full textRecent and historical studies of earthquake-induced liquefaction, as well as paleoliquefaction studies, demonstrate the potential usefulness of liquefaction data in the assessment of the earthquake potential of seismic sources. Paleoliquefaction studies, along with other paleoseismology studies, supplement historical and instrumental seismicity and provide information about the long-term behavior of earthquake sources. Paleoliquefaction studies focus on soft-sediment deformation features, including sand blows and sand dikes, which result from strong ground shaking. Most paleoliquefaction studies have been conducted in intraplate geologic settings, but a few such studies have been carried out in interplate settings. Paleoliquefaction studies provide information about timing, location, magnitude, and recurrence of large paleoearthquakes, particularly those with moment magnitude, M, greater than 6 during the past 50,000 years. This review paper presents background information on earthquake-induced liquefaction and resulting soft-sediment deformation features that may be preserved in the geologic record, best practices used in paleoliquefaction studies, and application of paleoliquefaction data in earthquake source characterization. The paper concludes with two examples of regional paleoliquefaction studies—in the Charleston seismic zone and the New Madrid seismic zone in the southeastern and central United States, respectively—which contributed to seismic source models used in earthquake hazard assessment
Grafton's pastime : a little book of verse.
No full textPreface in verse signed: "C.H.H." ; also verses by the same author on p. [79]Mode of access: Internet.OSU's copy 1 forms part of the Tuttle American Poetry Collection
ISC/OSI Journal Authors Survey Report
No full textOn behalf of the Joint Information Systems Committee (JISC) and the Open Society Institute (OSI) a survey of journal authors has been carried out by Key Perspectives Ltd. The terms of reference were to poll a cohort of authors who had published on an open access basis and another cohort of authors who had published their work in conventional journals without making the article available on open access. The survey’s aims were to investigate the authors’ awareness of new open access possibilities, the ease of identification of and submission to open access outlets, their experiences of publishing their work in this way, their concerns about any implications open access publishing may have upon their careers, and the reasons why (or not) they chose to publish through an open access outlet
POSSIBLE SURFACE DEFORMATION ALONG A LINEAMENT IN THE NEW MADRID SEISMIC ZONE, YARBRO, ARKANSAS
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