14,374 research outputs found
Supplementary_material – Supplemental material for Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand
No full textSupplemental material, Supplementary_material for Hybrid broadband ground motion simulation validation of small magnitude earthquakes in Canterbury, New Zealand by Robin L Lee, Brendon A Bradley, Peter J Stafford, Robert W Graves and Adrian Rodriguez-Marek in Earthquake Spectra</p
Geostatistical models for the assessment of the influence of shear wave velocity uncertainty and variability on ground response analyses
No full textA robust assessment of the influence of epistemic uncertainties and aleatory
variabilities on ground response analyses is a fundamental requirement for modern probabilistic
seismic hazard analyses. The study of epistemic uncertainties and aleatory variabilities should
follow three sequential steps: identification, quantification, and management (IQM procedure).
A fundamental input for ground response analyses is the shear-wave velocity (VS) profile. The
VS profile can be obtained via various types of geophysical tests. Each test has specific characteristics.
For these reasons, a consistent IQM procedure must be established to assess the type
and amount of uncertainties involved in the measurements, also addressing the peculiarities of
the investigated site. We propose a geostatistical model for the management of the uncertainties
included in the VS profiles obtained with surface wave tests. The model is based on the separate
randomization of travel times and layer thicknesses. It generates profiles that are consistent with
the measured “site signatures” such as the Rayleigh wave dispersion curve and the predominant
site period. The model can be easily generalized for other geophysical tests
Uncertainties and variabilities in seismic ground response analyses
No full textGround response analyses (GRAs) represent a key element for the nonergodic
(site-specific) evaluation of the seismic hazard. In this respect, epistemic uncertainties
and aleatory variabilities need to be properly identified, quantified, and managed to
obtain consistent estimates. Several collaborative efforts have been carried out in recent
years to assess the influence of uncertainties and variabilities in the GRA parameters
through benchmark studies. Specifically for site characterization, efforts are required to
guarantee a sufficient quality of in situ and laboratory tests. However, benchmark tests
have shown the existence of a certain level of “uncompressible uncertainty”. Stochastic
models implemented in GRAs are therefore required to evaluate the impact of uncertainties
and variabilities on the computed seismic hazard. Such models are to be based on large
databases of experimental data to produce consistent estimates. Examples will be provided
with a specific focus on geophysical tests for the evaluation of shear wave velocity models,
which are likely the most influent parameters in GRAs
Michael Rodriguez interviews author Paul Clemens
No full textAuthor Paul Clemens talks about his book "Made in Detroit," the genre of memoir, and writing about race. Clemens is interviewed by Michigan State University Librarian Michael Rodriguez for the MSU Libraries' Michigan Writers Series. Held in the MSU Main Library
Influence of epistemic uncertainty in shear wave velocity on seismic ground response analyses
No full textThis study aims at evaluating the influence of epistemic uncertainties in shear wave velocity (VS) on seismic ground response analyses (GRAs). A number of alternative VS profiles obtained from both invasive (i.e., borehole) and non-invasive (i.e., surface waves) testing methods are available for two blind study sites. These profiles are used to estimate epistemic uncertainties in VS, which are then propagated through equivalent linear-elastic GRAs, allowing for the quantification of intra-method uncertainty and inter-method variability in terms of spectral accelerations, amplification functions, and ‘damage parameters’ (i.e., Arias and Housner intensities). This study demonstrates that nonlinearity of soil response plays a fundamental role in increasing the propagated uncertainty in GRA. Additionally, GRAs were also performed by means of VS upper/lower range profiles developed from assumptions commonly used to account for epistemic uncertainties. These VS profiles were found to yield unrealistic site response estimates for both low strain (i.e., linear-elastic) and high strain (i.e., non-linear) levels
Michael Rodriguez interviews author Gary Gildner
No full textAuthor Gary Gildner explains why he left his tenured teaching position to move to Idaho to became a full-time writer of poetry. Gildner talks about donating his personal papers to Michigan State University Libraries' Special Collections, his writing style and how he approaches writing. Gildner is interviewed by MSU Librarian Michael Rodriguez for the MSU Libraries' Michigan Writer Series. Held at the MSU Main Library
Michael Rodriguez interviews author Tom Springer
No full textAuthor Tom Springer is interviewed about his writing career and his newest book "Looking for hickories". Springer talks about his career following after earning an Environmental Journalism degree from Michigan State University. He calls his genre "creative non-fiction" and explains how he weaves his memories into his books about life in rural and wild Michigan. Part of the Michigan State University Libraries' Michigan Writers Series. Springer is interviewed by Librarian Michael Rodriguez
Michael Rodriguez interviews historian and author Keith Widder
No full textHistorian and author Keith Widder talks about his move to Michigan from Wisconsin, his career as Curator of History for the Mackinac Island State Park Commission, his research interests, his book "Michigan Agricultural College", and his current projects. Widder is interviewed by Michigan State University Librarian Michael Rodriguez for the MSU Libraries' Michigan Writers Series. Held in the MSU Main Library
Adrian Quinones & Jaime Rodriguez interview
No full textThe Student Voices collection is a series of oral histories featuring UNC undergraduates discussing their experiences as first-year college students
Saving and storing tomato seeds (Liveseed Video)
No full textDr Adrian Rodriguez Burruezo demonstrates how to extract, clean, wash and dry tomato seeds in order to prepare them for storage
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