cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17603/ds2-r93e-7d76
title: Specific surface area testing
title: in Characterization and Geotechnical Properties of Wildfire Ashes

description: Specific surface area testing was measured by the methylene blue dye drop procedure outlined in Santamarina et al. (2002). The methylene blue solution was prepared by mixing 1.0 g of dry powder with 200 mL of deionized water. The ash suspension was prepared by mixing 10 g of oven-dry ash with 30 mL of deionized water. The methylene blue solution as added to the ash suspension in 0.5 mL increments, and for each addition of MB, the ash suspension was mixed for 1 min. Then, a small drop was taken from the suspension and placed on filter paper P5. If the unabsorbed methylene blue formed a permanent light blue halo around the ash aggregate spot, the “end point” has been reached (i.e., the MB has replaced cations in the double layer and coated all the mineral surfaces). The processes was repeated until the "end point" was reached, and the specific surface area was determined.
description: This project summarizes the geotechnical engineering properties of eight samples of wildfire ash sampled from three different wildfire sites in central and southern California. This data can be used in conjunction with data collected from others to provide a database of the physical, chemical, hydrological, and engineering properties of wildfire ashes. Extensive engineering testing of wildfire ashes is not readily available in literature, so this work will supplement the supply currently available. This work would be information and educational for those researching wildfire ashes, fire-exposed slopes, carbonate-rich soils, and manmade soils, including other types of ash. This data can be reused by those who would like reference data for further testing on wildfire ashes and for those who require reference data on soil engineering properties.
DOI: 10.21979/n9/ice5mo
title: Unloading-induced period-doubling slip

description: Analyzed data for unloading-induced period-doubling slip
DOI: 10.21979/n9/ltmim6
title: Related Data for: Active faults revealed and new constraints on their seismogenic depth from a high-resolution regional focal mechanism catalog in Myanmar (2016-2021)

description: Broadband seismic waveform data from the EOS-DMH-MEC network used in the relocation and gCAP inversion of earthquake focal mechanisms. SAC files for Event #25: 20181105_1948
DOI: 10.17603/ds2-89q3-5x76
title: Duck DAS Data (decimated)
title: in Fiber-optic sensing of nearshore processes in Duck, NC

description: Distributed Acoustic Sensing (DAS) is a new method for recording oceanographic processes using seafloor fiber-optic cables, such as telecommunication cables. DAS returns spatially distributed measurements of cable strain, which can be related to hydrodynamic pressure, turning a submarine cable into a dense sampling array. A reinforced fiber-optic cable was installed in the cross-shore from the dune toe to ~15-m-water depth at the USACE Field Research Facility in Duck, NC to quantitatively compare DAS strain to co-located pressure sensors from November 2021 to February 2022.
DOI: 10.17603/ds2-4evc-4k10
title: Social Science Methods: Observations—CONVERGE Extreme Events Research Check Sheets Series

description: This check sheet offers an overview for those considering designing and conducting an observational study. Strategies for selecting observation sites, obtaining participant consent, and writing fieldnotes are provided. About the CONVERGE Extreme Events Research Check Sheets Series: The National Science Foundation-supported CONVERGE facility at the Natural Hazards Center at the University of Colorado Boulder has developed a series of short, graphical check sheets that are meant to be used as researchers design their studies, prepare to enter the field, conduct field research, and exit the field. The series offers best practices for extreme events research and includes check sheets that are free to the research community. More information is available at: https://converge.colorado.edu/resources/check-sheets.
DOI: 10.17603/ds2-ycz2-xc47
title: Guidance for Data Management Plans—CONVERGE Extreme Events Research Check Sheets Series

description: This check sheet offers guidance on writing a data management plan based on National Science Foundation requirements. This guidance can help researchers who are applying for external funding and who intend to publish their data, data collection protocols, or instruments via the DesignSafe Cyberinfrastructure. About the CONVERGE Extreme Events Research Check Sheets Series: The National Science Foundation-supported CONVERGE facility at the Natural Hazards Center at the University of Colorado Boulder has developed a series of short, graphical check sheets that are meant to be used as researchers design their studies, prepare to enter the field, conduct field research, and exit the field. The series offers best practices for extreme events research and includes check sheets that are free to the research community. More information is available at: https://converge.colorado.edu/resources/check-sheets.
DOI: 10.21979/n9/m2c3zv
title: Replication Data for: Aperiodic Metagratings for High‐Performance Multifunctional Acoustic Lenses

description: Replication Data for: Aperiodic Metagratings for High‐Performance Multifunctional Acoustic Lenses
DOI: 10.17603/ds2-7n84-t542
title: Compilation of Shear-Wave Velocity Measurements in the Sacramento-San Joaquin Delta Region of California

description: Shear wave velocity (VS) of soils and rock is a mechanical property that can be measured in situ through invasive (e.g., seismic cone penetration testing or suspension logging) or noninvasive techniques (e.g., surface wave testing). These data are often used in the development and application of earthquake site response models (e.g., to estimate the time-averaged VS in the upper 30 m (VS30) and to develop profiles for ground response analyses). We have compiled 175 VS profiles across the Sacramento-San Joaquin Delta region of California from 23 different sources and provide metadata such as their location, testing method, surficial geology, topographic slope, and terrain class. We also provide information about the site condition (i.e., whether through a levee or in a free-field environment) and the peat thickness encountered at the site (obtained from nearby boreholes or cone penetration testing). Both layer-based (e.g., surface wave testing) and point-based data (e.g., suspension logging) are reported in the format provided by the original source documents. These data are also accessible in the Shear Wave Velocity Profile DataBase (VSPDB; www.vspdb.org) (Ahdi et al. 2018; Kwak et al. 2021). In addition to the tabulated data (Delta_Vs_Compilation.csv), we also provide a graphical user interface (GUI) for users to view the profile data (Profile-Viewer-GUI.ipynb).
DOI: 10.17603/ds2-81nz-mq71
title: In-Depth, Semi-Structured Interviews: A Typology of Interview Questions—CONVERGE Extreme Events Research Check Sheets Series

description: This check sheet details the types of questions researchers may consider as they develop their interview guide. Incorporating these questions can help to ensure that researchers gather information about context—such as feelings, values, and sensory information—that can enrich data collection, analysis, and reporting. About the CONVERGE Extreme Events Research Check Sheets Series: The National Science Foundation-supported CONVERGE facility at the Natural Hazards Center at the University of Colorado Boulder has developed a series of short, graphical check sheets that are meant to be used as researchers design their studies, prepare to enter the field, conduct field research, and exit the field. The series offers best practices for extreme events research and includes check sheets that are free to the research community. More information is available at: https://converge.colorado.edu/resources/check-sheets.
DOI: 10.17603/ds2-dvcm-9987
title: Community disaster preparedness to earthquakes in Washington State: Survey instruments in French

description: This collection includes two survey instruments in French. The individual disaster preparedness (IDP) survey measured respondents’ reports of their own disaster preparedness whereas the community disaster preparedness (CDP) survey measured their reports of community-level disaster preparedness. The surveys are apart of a larger research project called the “Community disaster preparedness to earthquakes in Washington State”.
DOI: 10.17603/ds2-te4s-wg28
title: Research Experiences for Undergraduates (REU), NHERI 2022: Symbolic Regression

description: This project used symbolic regression to derive a constitutive Cam-Clay soil model for drained soils. Using the model future research will be able to predict the behavior of undrained soil. This project tested the use of symbolic regression which can be adapted to predict outcomes for other natural hazards in the future. Scientists, researchers, and engineers may find this useful.
DOI: 10.15468/dl.j3mc5x
title: Occurrence Download

description: A dataset containing 349 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is Specimen",
 "Geometry POLYGON((-4.4785 36.68261,-4.47596 36.66384,-4.45242 36.66078,-4.44198 36.6808,-4.45777 36.68917,-4.4785 36.68261))",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is Plantae"
 ]
}

 The dataset includes 349 records from 9 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015639-250525065834625/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.17603/ds2-mzwr-gn50
title: How to Develop Research Materials in Languages Other than English—CONVERGE Extreme Events Research Check Sheets Series

description: This check sheet is for researchers who are planning to work with participants who speak a language or multiple languages besides English. This check sheet will help researchers ensure that their research materials are accessible. It also offers recommendations for preparing to translate and interpret materials. About the CONVERGE Extreme Events Research Check Sheets Series: The National Science Foundation-supported CONVERGE facility at the Natural Hazards Center at the University of Colorado Boulder has developed a series of short, graphical check sheets that are meant to be used as researchers design their studies, prepare to enter the field, conduct field research, and exit the field. The series offers best practices for extreme events research and includes check sheets that are free to the research community. More information is available at: https://converge.colorado.edu/resources/check-sheets.
DOI: 10.17603/ds2-qwq5-m087
title: Entropy-based IM selection
title: in Entropy-based IM selection for site-specific seismic risk assessment

description: Entropy-based IM selection
description: This project proposed a methodology for optimal ground motion intensity measure (IM) selection based on information theory. The proposed IM selection approach can facilitate more confident site-specific seismic risk assessment.
DOI: 10.17603/ds2-6vmd-5p16
title: Natural Hazards Research Summit 2022: Social and Economic Disparity in Isolation Risk due to Sea Level Rise in the United States

description: In this work, we examine community isolation due to SLR in which isolated census blocks refer to those without an available route to schools and emergency services. By combining estimates of isolation with socio-demographic data, we examine social and economic disparities under various relative SLR scenarios (1-10 ft) across the coastal United States. We find that communities with older adults and higher rates of minority populations face a disproportionately higher risk of isolation, particularly Black and Hispanic populations. Areas with higher rates of renters are at higher risk of isolation. These results highlight a previously unidentified concern for community vulnerability to SLR and allow us to identify populations at risk that would be missing from analyses dependent on just inundation measures, namely young, higher-income renters. This nuance raises new questions about the impacts of SLR on community well-being with significant implications for justice in climate adaptation and infrastructure development.
DOI: 10.17603/ds2-3jg0-1p09
title: Flood induced material failure in anchored aboveground atmospheric storage tanks

description: Material failures – yielding and rupture – in shell and bottom plates in anchored above ground storage tanks’ (ASTs) during flood events were investigated. A finite element simulation-based approach was used wherein, first, design parameters such as tank diameter, relative density and height of stored contents, yield strength, inundation depth and bottom plate thickness were sampled using Latin Hypercube Sampling (LHS). For each design parameter combination, an AST was designed as per API 650 and maximum von mises stresses in bottom plate and tank shell were determined from finite element analysis for 1000 tanks and were compared against two different failure thresholds corresponding to material yielding and rupture (maximum of 1.6 yield stress or 480 MPa). Herein, LS-Dyna, a finite element software, was used on a high performance computing cluster at Louisiana State University to perform the simulations. The dataset contains simulation output from the finite element analysis. This data can be used by researchers to advance the understanding on performance of above ground storage tanks. Furthermore, this data set can also be used by researchers using machine learning techniques for natural hazards research.
DOI: 10.17603/ds2-r7e4-6r61
title: Dataset - Experimental studies on rehabilitation techniques in masonry walls

description: This project includes information of 94 specimens consisting of masonry walls that were experimentally tested by various authors and rehabilitated using different techniques, including jacketing with welded wire mesh, jacketing with steel bands, steel plates, FRP bands, polypropylene bands, textile mortar mesh, and fiber-reinforced mortars.

This dataset is part of a thesis project aimed at studying different techniques that can be used to rehabilitate masonry wall-based structures, to compare these techniques, and to provide options for creating more resilient communities.

Experiments conducted up to 2021 are included, so it is possible that more recent experiments are not included in the dataset. The dataset can be consulted for free.
DOI: 10.17603/ds2410m
title: KAIST1, KAIST2 - KAIST Experiments, in PRJ-1843: LEAP-UCD-2017
title: in LEAP-UCD-2017 Experiments (Liquefaction Experiments and Analysis Projects)

description: Twenty-four centrifuge model tests of liquefaction and lateral spreading, performed as part of a round robin test program, are shared and compared in this archive. Please see the general report section of the published project for an overview comparison and background of all of the experiments. One document in the report (with “ReadMe” in the file name) describes the organization of the data archive. The comparisons presented in the general report section will serve as an index to help the users find individual experiments of interest.  This data from 24 model tests is published as nine separate experiments in this archive (one experiment per centrifuge facility). Each "experiment" includes two or three model tests and each model test includes between one and three destructive shaking events.
All of the tests modeled a 4 m thick deposit of Ottawa F-65 sand with a 5-degree surface slope in a rigid box. The tests covered a range of ground motion intensities and a range of relative densities to define the median response and the sensitivity of the response to relative density and shaking intensity. The nine centrifuge facilities involved in this test program included Cambridge University (UK), Ehime University (Japan), IFSTTAR (France), NCU (Taiwan), KAIST (Korea), Kyoto University (Japan), RPI (USA), UC Davis (USA), and Zhejiang University (China).
description: Lateral spreading of a submerged slope for LEAP-UCD-2017
DOI: 10.17603/ds2-6ap5-sk09
title: Active-Source, Near-Surface, Surface-Wave Measurements using Distributed Acoustic Sensing (DAS), Cone Penetration Testing (CPT), and Downhole (DH) Testing
title: in Characterization of the NHERI@UTexas Hornsby Bend Test Site

description: The data archived in this project are the result of site characterization efforts at the NHERI@UTexas Hornsby Bend test site in Austin, Texas, USA. Each site characterization effort at the Hornsby Bend test site is organized as its own experiment. Importantly, some of these efforts are on-going and results from those on-going efforts will be archived in this project as they become available.
description: The data archived in this experiment compares results of active-source, near-surface, surface-wave measurements from distributed acoustic sensing (DAS) to results from invasive testing along the length of the DAS array. The fiber-optic cable for the DAS testing from NanZee Sensing Technology (NZS-DSS-C02)  was deployed in a shallow trench at the site. On the near-side of the array, the NanZee fiber was connected to the interrogator unit, an OptaSense ODH4+. The ODH4+ was configured by a team from OptaSense to ensure high-quality data acquisition. The ODH4+ utilized a 2.04-m gauge length and a 1.02-m channel separation. The DAS fiber-optic cable was used to record actively-generated near-surface signals (primarily surface waves) from the vibroseis shaker truck Thumper from the NHERI@UTexas experimental facility. Vibroseis sweeps were performed at 32 locations along the array at 8-m intervals ranging from -24 m to 224 m. Thumper was used to produce a 12 second sweep in the vertical direction with frequencies swept up linearly from 5 to 200 Hz. Three sweeps were performed at each source location. The data in this project includes the raw seismic waveforms from the DAS and geophone arrays in Seismic Unix (.su) format. The DAS and geophone recordings are provided in terms of strain, output from the OptaSense data extraction software. Subsequently, invasive testing was performed along the array including cone penetratiuon testing (CPT) soundings at nine locations spaced every 25 m from 0 to 200 m and downhole (DH) testing was performed within a borehole located at 12.5 m along the array. Data from this invasive testing is included in this project in comma-separated value (.csv) and Matlab (.mat) formats for the CPT and DH, respectively.
DOI: 10.17603/ds2-f4c9-nm43
title: Research Experiences for Undergraduates (REU), NSF NHERI 2024: Evaluating the Free Surface Interactions of Tsunami-like Waves with a Structural Column

description: This project focuses on the change in free surface elevation of solitary and transient waves in relation to wave progression and structure interaction. This data can be reused to observe wave changes as it interacts with a square structure and can be used to further investigate additional wave types and heights by comparison. The unique aspect of this project is the large sqaure structure. Not many studies focus on wave-structure interaction with a square structure. This project is geared to professionals in industry, civil engineers, and researchers who may want to utilize a square support rather than a cylinder. City planners may also be interested in this research to predict how a wave would interact with their square infrasturcture.
DOI: 10.17603/ds2-7we3-6106
title: Natural Hazards Research Summit 2022: Establishing Fragility Curves for Seismic Resilience of Mass Timber Buildings with Self-Centering Cross-Laminated Timber Shear Walls

description: Driven by demand for sustainable buildings and a reduction in construction time, mass timber buildings, specifically cross-laminated timber (CLT), is being more widely used in mid-rise buildings in the US. Low damage post-tensioned self-centering (SC) CLT shear walls (SC-CLT walls) provide an opportunity to develop seismically resilient CLT buildings. Previous research focused primarily on the lateral-load response under unidirectional loading of isolated self-centering timber walls, without considering the interaction with the adjacent building structural components, i.e., the floor diaphragms, collector beams, and gravity load system. Buildings response under seismic loading is multidirectional and there are concerns that multidirectional loading may be more damaging to SC-CLT wall panels and the adjacent building structural components than unidirectional loading, which affects the potential seismic resilience of buildings with SC-CLT walls. A series of lateral-load tests of a 0.625-scale timber sub-assembly was conducted at the NHERI Lehigh Large-Scale Multi-Directional Hybrid Simulation Experimental Facility to investigate the the lateral-load response and damage of SC-CLT walls and the capability of the adjacent building structural components i.e., the floor diaphragms, collector beams, and gravity load system to accommodate the building response and the controlled-rocking of the SC-CLT walls under multidirectional lateral loading.
DOI: 10.17603/ds2-d7j2-na10
title: Centrifuge Model Design for Axially Loaded Structures Under Large Ground Movements
title: in Geotechnical Demands for Characterizing Performance of Pipeline Systems with Enlarged Components

description: These experiments were designed to investigate the interference of rigid boundaries on axial pipe pull test results. These experiments were run in CU Boulder's 15g-ton centrifuge, and a series of 20 tests were conducted varying the boundary's proximity to the pipe model. The force-displacement curves of each test are included as raw data (model scale), processed data (prototype scale), and plotable data (prototype scale). The data can be used to determine the force-displacement relationships for axially pulled pipelines.
description: The project included a series of centrifuge experiments performed at CU Boulder's Center for Infrastructure, Energy, and Space Testing. The 15 g-ton centrifuge was used to test n=12.5 reduced scale pipelines with enlarged joints that act as anchors in the ground. Axial movement was applied to the pipelines with various geometric variables adjusted to characterize the additional frictional resistance of enlarged joints common in hazard resilient pipeline systems.