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A P-GRADE Portlet for Seismic Hazard Analysis

A P-GRADE Portlet for Seismic Hazard Analysis . Dr. Cevat Şener Dept. of Computer Engineering, Middle East Technical University, 06800 Ankara, Turkey sener@ceng.metu.edu.tr. Outline. Need for SHA Elements Demo Video Suggested Improvement Wrap-up. Need for SHA.

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A P-GRADE Portlet for Seismic Hazard Analysis

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  1. A P-GRADE Portlet for Seismic Hazard Analysis Dr. CevatŞenerDept. of Computer Engineering, Middle East Technical University, 06800 Ankara, Turkeysener@ceng.metu.edu.tr

  2. Outline • Need for SHA • Elements • Demo Video • Suggested Improvement • Wrap-up

  3. Need for SHA • Seismic Hazard Analysis (SHA) is very important • for public safety and hazards mitigation • in design and construction of highways, bridges, dams and industrial buildings; • for protection of energy facilities, special occupancy structures like hospitals, schools and fire stations; • for correct determination of earthquake insurance premiums • However, this process is very expensive as involves many models to be applied that need to access several types of data. • Hence, seismic hazard/risk maps are not kept up-to-date, or they may not be at required level of granularity.

  4. ... and when seismic risks are not considered properly ...

  5. SRA SHA • Seismic Hazard Analysis is core to Seismic Risk Assessment:While SHA describes the EQ-related phenomena that have potential to cause harm and the associated occurrence frequencies,SRA assesses the probability of occurrence of losses as a result of the seismic hazard. • This application/portlet is named “SRA” for historical reasons, and then later renamed to “SHA”.

  6. Elements

  7. User Interaction • Web-based GUI is a portlet on the P-GRADE Portal. • It is a multipage portlet • Project management • Parameter set management • Detailed parameter settings • Job management • JavaScript is used for • Google Maps API • Parameter value validation • Visualization of output graphs

  8. Directory structure for user/project/parameter-set management: portal_work/users/<username>/sha |----- <project_1> | |---- -- <parameter_set_1> | | |------- parameters | | |------- job status & logs | | |------- outputs | |------- <parameter_set_2> | | |------- … | |------- … | |----- <project_2> | |------- … | |----- …

  9. It allows embedding alternative models and attenuation relations. • Master EQ Source Model is embedded into the hazard calculations. • Its Engine handles the job management through WMS client tools of gLite. • Number of processors required by the application depends on the number of grids (sub-regions) that the site divided into. • Bash scripts are used for Grid job management.

  10. It can access and use EQ catalog data served by SDS (Seismic Data Server) • developed by Boğaziçi University, • provides official lists of earthquakes, stations and sensor information through a high-level interface through C++ iterators. • Data Repository • It maintains a data repository for EQ catalogs, fault planes, area sources, site conditions, attenuation relations, produced results... • R*-tree index is used to access this repository on SEs.

  11. Demo Video • Duration: <4 min. • Steps • Login to the P-GRADE Portal • Check credentials, and switch to the SHAportlet • Submit a job for a site in MK • Go through the results of a previous job for a site in TR • Check the status of the job for the MK site • Go through its results when done • Video: [click here]

  12. Improvement to suggest • Project management API • For handling a user-level hierarchical project structure • Maybe extended to provide a multi-user collaborative environment around projects (models)

  13. Wrap-up • It is not straightforward • to go along with dynamically changing nature of the seismic hazard problem and • to produce up-to-date assessment figures continuously. • A Portal-based approach to attack the problem is introduced.

  14. Thank you… Questions? Acknowledgement: This study is supported by the FP7 SEE-GRID-SCI project, funded by the EC under the contract RI-211338.

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