Item talk:Q45913

ORCID:

 '@context': http://schema.org
 '@id': https://orcid.org/0000-0003-3075-4703
 '@reverse': {}
 '@type': Person
 familyName: Ellefsen
 givenName: Karl
 mainEntityOfPage: https://orcid.org/0000-0003-3075-4703

OpenAlex:

 created_date: '2023-07-21'
 display_name: Karl J. Ellefsen
 display_name_alternatives:
 - Karl Ellefsen
 - K. J. Ellefsen
 - Karl J. Ellefsen
 ids:
   openalex: https://openalex.org/A5031333239
   orcid: https://orcid.org/0000-0003-3075-4703
 last_known_institutions:
 - country_code: US
   display_name: United States Geological Survey
   id: https://openalex.org/I1286329397
   lineage:
   - https://openalex.org/I1286329397
   - https://openalex.org/I1335927249
   ror: https://ror.org/035a68863
   type: government
 orcid: https://orcid.org/0000-0003-3075-4703
 topics:
 - count: 46
   display_name: Applications of Ground-Penetrating Radar in Geoscience and Engineering
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T11609
   subfield:
     display_name: Ocean Engineering
     id: https://openalex.org/subfields/2212
 - count: 35
   display_name: Seismic Waveform Inversion in Geophysics
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Earth and Planetary Sciences
     id: https://openalex.org/fields/19
   id: https://openalex.org/T10271
   subfield:
     display_name: Geophysics
     id: https://openalex.org/subfields/1908
 - count: 33
   display_name: High-Resolution Seismic Noise Tomography
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Earth and Planetary Sciences
     id: https://openalex.org/fields/19
   id: https://openalex.org/T11757
   subfield:
     display_name: Geophysics
     id: https://openalex.org/subfields/1908
 - count: 23
   display_name: Machine Learning for Mineral Prospectivity Mapping
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Computer Science
     id: https://openalex.org/fields/17
   id: https://openalex.org/T12157
   subfield:
     display_name: Artificial Intelligence
     id: https://openalex.org/subfields/1702
 - count: 15
   display_name: Geophysical Exploration and Monitoring Techniques
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Earth and Planetary Sciences
     id: https://openalex.org/fields/19
   id: https://openalex.org/T10572
   subfield:
     display_name: Geophysics
     id: https://openalex.org/subfields/1908
 - count: 12
   display_name: Digital Soil Mapping Techniques
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Environmental Science
     id: https://openalex.org/fields/23
   id: https://openalex.org/T10770
   subfield:
     display_name: Environmental Engineering
     id: https://openalex.org/subfields/2305
 - count: 9
   display_name: Drilling Fluid Technology and Well Integrity
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T10892
   subfield:
     display_name: Ocean Engineering
     id: https://openalex.org/subfields/2212
 - count: 5
   display_name: Microwave Imaging for Breast Cancer Detection
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T11739
   subfield:
     display_name: Biomedical Engineering
     id: https://openalex.org/subfields/2204
 - count: 5
   display_name: Multiscale Seafloor Mapping and Classification Techniques
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Earth and Planetary Sciences
     id: https://openalex.org/fields/19
   id: https://openalex.org/T11698
   subfield:
     display_name: Oceanography
     id: https://openalex.org/subfields/1910
 - count: 5
   display_name: Geological Modeling and Uncertainty Analysis
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Earth and Planetary Sciences
     id: https://openalex.org/fields/19
   id: https://openalex.org/T13067
   subfield:
     display_name: Geochemistry and Petrology
     id: https://openalex.org/subfields/1906
 - count: 4
   display_name: Applications of Clay Nanotubes in Various Fields
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Materials Science
     id: https://openalex.org/fields/25
   id: https://openalex.org/T11852
   subfield:
     display_name: Biomaterials
     id: https://openalex.org/subfields/2502
 - count: 3
   display_name: Non-Destructive Techniques Based on Eddy Current Testing
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T12169
   subfield:
     display_name: Mechanical Engineering
     id: https://openalex.org/subfields/2210
 - count: 3
   display_name: Geochemistry of Manganese Oxides in Sedimentary Environments
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Earth and Planetary Sciences
     id: https://openalex.org/fields/19
   id: https://openalex.org/T11740
   subfield:
     display_name: Geochemistry and Petrology
     id: https://openalex.org/subfields/1906
 - count: 3
   display_name: Comminution in Mineral Processing
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T12282
   subfield:
     display_name: Mechanical Engineering
     id: https://openalex.org/subfields/2210
 - count: 3
   display_name: Machine Learning for Earthquake Early Warning Systems
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Computer Science
     id: https://openalex.org/fields/17
   id: https://openalex.org/T13018
   subfield:
     display_name: Artificial Intelligence
     id: https://openalex.org/subfields/1702
 - count: 3
   display_name: Rock Mechanics and Wave Propagation in Geomedia
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T13619
   subfield:
     display_name: Mechanics of Materials
     id: https://openalex.org/subfields/2211
 - count: 3
   display_name: Environmental Impact of Heavy Metal Contamination
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Environmental Science
     id: https://openalex.org/fields/23
   id: https://openalex.org/T10139
   subfield:
     display_name: Pollution
     id: https://openalex.org/subfields/2310
 - count: 3
   display_name: Chemistry of Actinide and Lanthanide Elements
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Chemistry
     id: https://openalex.org/fields/16
   id: https://openalex.org/T10973
   subfield:
     display_name: Inorganic Chemistry
     id: https://openalex.org/subfields/1604
 - count: 3
   display_name: Model-Based Clustering with Mixture Models
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Computer Science
     id: https://openalex.org/fields/17
   id: https://openalex.org/T11901
   subfield:
     display_name: Artificial Intelligence
     id: https://openalex.org/subfields/1702
 - count: 3
   display_name: Application of Stable Isotopes in Trophic Ecology
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Environmental Science
     id: https://openalex.org/fields/23
   id: https://openalex.org/T12073
   subfield:
     display_name: Ecology
     id: https://openalex.org/subfields/2303
 - count: 2
   display_name: Finite-Difference Time-Domain Methods in Electromagnetics
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T11263
   subfield:
     display_name: Electrical and Electronic Engineering
     id: https://openalex.org/subfields/2208
 - count: 2
   display_name: Anaerobic Methane Oxidation and Gas Hydrates
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Environmental Science
     id: https://openalex.org/fields/23
   id: https://openalex.org/T10995
   subfield:
     display_name: Environmental Chemistry
     id: https://openalex.org/subfields/2304
 - count: 2
   display_name: Groundwater Flow and Transport Modeling
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Environmental Science
     id: https://openalex.org/fields/23
   id: https://openalex.org/T10894
   subfield:
     display_name: Environmental Engineering
     id: https://openalex.org/subfields/2305
 - count: 2
   display_name: Hydraulic Fracturing in Shale Gas Reservoirs
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Engineering
     id: https://openalex.org/fields/22
   id: https://openalex.org/T10635
   subfield:
     display_name: Mechanical Engineering
     id: https://openalex.org/subfields/2210
 - count: 2
   display_name: Water Quality and Hydrogeology Research
   domain:
     display_name: Physical Sciences
     id: https://openalex.org/domains/3
   field:
     display_name: Environmental Science
     id: https://openalex.org/fields/23
   id: https://openalex.org/T12773
   subfield:
     display_name: Water Science and Technology
     id: https://openalex.org/subfields/2312
 updated_date: '2024-05-19T05:59:06.490444'

USGS Staff Profile:

 '@context': https://schema.org
 '@type': Person
 affiliation: []
 description:
 - '@type': TextObject
   abstract: Scientist Emeritus with the Geology, Geophysics, and Geochemistry Science
     Center
   additionalType: short description
 - '@type': TextObject
   abstract: Karl Ellefsen is an Emeritus with the Geology, Geophysics, and Geochemistry
     Science Center.
   additionalType: staff profile page introductory statement
 email: ellefsen@usgs.gov
 hasCredential: []
 hasOccupation:
 - '@type': OrganizationalRole
   affiliatedOrganization:
     '@type': Organization
     name: Geology, Geophysics, and Geochemistry Science Center
     url: https://www.usgs.gov/centers/gggsc
   roleName: Scientist Emeritus
   startDate: '2024-05-12T15:28:11.265265'
 identifier:
 - '@type': PropertyValue
   propertyID: GeoKB
   value: https://geokb.wikibase.cloud/entity/Q45913
 - '@type': PropertyValue
   propertyID: ORCID
   value: 0000-0003-3075-4703
 jobTitle: Scientist Emeritus
 knowsAbout: []
 memberOf:
   '@type': OrganizationalRole
   member:
     '@type': Organization
     name: U.S. Geological Survey
   name: staff member
   startDate: '2024-05-12T15:28:11.262715'
 name: Karl J Ellefsen
 url: https://www.usgs.gov/staff-profiles/karl-j-ellefsen