Presidential Young Investigator:  Seismology
{'Code': '06030204', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Marvin E. Kauffman', 'PO_EMAI': None, 'PO_PHON': None}
Observations of the earth's free oscillations and the seismic                   structure of the earth's interior.  Improved algorithms are                     required to resolve lateral structure to the accuracy and                       resolution required to make definitive judgements on deep earth                 geology and thermal structure.  Current studies of upper mantle                 structure using low-frequency ( &lt; 5mHz) surface waves have used                 inversion algorithms that are valid only for long-wavelength                    ( &gt; 4000km) aspherical structure.  Dr. Park has developed an                    asymptotic coupled-mode formalism that is valid for weak                        perturbations at all wavelengths.  He intends to pursue both a                  long-wavelength inversion using this technique and a                            "controlled" synthetic-seismogram study of the effects on low-                  frequency waveforms of "sharp" lateral gradients in seismic                     structure e.g., continent-ocean boundaries.  These projects                     will entail the use of advanced computer hardware available                     through Yale's Computer Science Department and the NSF                          supercomputer centers.                                                                                                                                          The spectral content of high frequency seismic codas caused by                  reverberations in the crust.  Preliminary investigations of                     frequency-dependent particle-motion polarization suggest that                   many codas decompose into distinct waveguide resonances with                    independent propagation histories.  Dr. Park anticipates                        further collaborative research using existing regional array                    data, with application in lithospheric structure problems and                   seismic test-ban discrimination questions.
{'FirstName': 'Jeffrey', 'LastName': 'Park', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Jeffrey J Park', 'EmailAddress': 'jeffrey.park@yale.edu', 'NSF_ID': '000456886', 'StartDate': '07/01/1987', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'Yale University', 'CityName': 'NEW HAVEN', 'ZipCode': '065113572', 'PhoneNumber': '2037854689', 'StreetAddress': '150 MUNSON ST', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'Connecticut', 'StateCode': 'CT', 'CONGRESSDISTRICT': '03', 'CONGRESS_DISTRICT_ORG': 'CT03', 'ORG_UEI_NUM': 'FL6GV84CKN57', 'ORG_LGL_BUS_NAME': 'YALE UNIV', 'ORG_PRNT_UEI_NUM': 'FL6GV84CKN57'}
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[{'Code': '1574', 'Text': 'Geophysics'}, {'Code': '1575', 'Text': 'EDUCATION AND HUMAN RESOURCES'}, {'Code': '9145', 'Text': 'SPECIAL PROGRAMS-RESERVE'}]
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