ORCID Profile
0000-0002-6106-9779
Current Organisations
Colorado State University
,
Johns Hopkins University
,
Yale School of Public Health
,
Western Michigan University
,
Urmia University
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Publisher: Springer Science and Business Media LLC
Date: 09-02-2021
Publisher: Research Square Platform LLC
Date: 19-05-2021
DOI: 10.21203/RS.3.RS-459336/V1
Abstract: Wave velocity as a simple nondestructive method is used for various applications in geotechnical engineering. Several physical parameters and anisotropy related to rock textural arrangements, schistosity and weakness planes such as cracks and joints affect the P-wave velocity (V P ). First, V P anisotropy of quartz-mica schist as a common type of widespread metamorphic rock was compared with V P anisotropy of jointed homogeneous limestone specimens to clarify effect of these two different types of anisotropies. The results showed that the V P anisotropy of quartz-mica schist texture is stronger than the V P anisotropy of jointed limestone, because all body of quartz-mica schist specimens have V P anisotropy behavior. Many rocks are anisotropic and degree of anisotropy varies from one rock to another. Several investigations have been carried out on V P anisotropy but there is not a unique comprehensive relation to represent the influence of different degrees of anisotropy on the V P for different rocks. The relation between V P and angle (θ) between the axis of symmetry (perpendicular to weakness planes) with the wave propagation direction was analyzed for a wide range of anisotropy degree using the results of nine different types of rocks including: Angouran quartz-mica schist, Golgohar mica schist, hibole schist, mica-quart schist, Marcellus shale, Withby shale WUK47B, WUK70 and WUK2, and Veroia-Polymylos gneiss. A new simple empirical relation fitted to all groups of results was obtained to assess V P for different degrees of anisotropies with a good correlation of determination (R 2 = 0.937), low RMSE (RMSE = 320 m/s) and low CV (CV = 7.0%). P wave velocity anisotropy can simply be predicted by the developed relation using only two parameters of V P0 and V P90 . A V P anisotropy classification diagram was also developed based on the different values of ε.
Publisher: Springer Science and Business Media LLC
Date: 11-2020
Publisher: Springer Science and Business Media LLC
Date: 13-10-2023
Publisher: Springer Science and Business Media LLC
Date: 08-09-2021
Publisher: Elsevier BV
Date: 10-2019
Publisher: Elsevier BV
Date: 03-2020
Publisher: Cold Spring Harbor Laboratory
Date: 26-08-2021
DOI: 10.1101/2021.08.21.21262393
Abstract: Genomic sequencing provides critical information to track the evolution and spread of SARS-CoV-2, optimize molecular tests, treatments and vaccines, and guide public health responses. To investigate the spatiotemporal heterogeneity in the global SARS-CoV-2 genomic surveillance, we estimated the impact of sequencing intensity and turnaround times (TAT) on variant detection in 167 countries. Most countries submit genomes days after s le collection, and 77% of low and middle income countries sequenced .5% of their cases. We found that sequencing at least 0.5% of the cases, with a TAT days, could be a benchmark for SARS-CoV-2 genomic surveillance efforts. Socioeconomic inequalities substantially impact our ability to quickly detect SARS-CoV-2 variants, and undermine the global pandemic preparedness. Socioeconomic inequalities impacted the SARS-CoV-2 genomic surveillance, and undermined the global pandemic preparedness.
Publisher: Springer Science and Business Media LLC
Date: 19-10-2021
Publisher: Springer Science and Business Media LLC
Date: 05-2019
No related grants have been discovered for Hassan Moomivand.