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| JFZ5320 | Seismic Tomography | 3+0+0 | ECTS:7.5 | | Year / Semester | Fall Semester | | Level of Course | Second Cycle | | Status | Elective | | Department | DEPARTMENT of GEOPHYSICAL ENGINEERING | | Prerequisites and co-requisites | None | | Mode of Delivery | | | Contact Hours | 14 weeks - 3 hours of lectures per week | | Lecturer | Prof. Dr. Hüseyin GÖKALP | | Co-Lecturer | None | | Language of instruction | Turkish | | Professional practise ( internship ) | None | | | | The aim of the course: | | The student should obtain fundamental knowledge about seismic tomography. |
| Programme Outcomes | CTPO | TOA | | Upon successful completion of the course, the students will be able to : | | | | PO - 1 : | comprehend the central slice theory and historical backround about the tomography | 1,2,3 | 1,3,5, | | PO - 2 : | grasp ray theory and some important ray tracing algorithms. | 1,2,3 | 1,3,5, | | PO - 3 : | comprehend the methods of representation of underground structures | 1,2,3 | 1,3, | | PO - 4 : | understand the calculation of ray path and travel times of seismic waves | 1,2,3 | 1,3,5, | | PO - 5 : | comprehend the prominent inversion techniques for inverting travel times | 1,2,3 | 1,3,5, | | PO - 6 : | understand the resolution analysis of tomographic results | 1,2,3 | 1,3,4,5, | | CTPO : Contribution to programme outcomes, TOA :Type of assessment (1: written exam, 2: Oral exam, 3: Homework assignment, 4: Laboratory exercise/exam, 5: Seminar / presentation, 6: Term paper), PO : Learning Outcome | | |
| The central slice theorem. Medical Imaging. Transform Techniques. Series Expension Techniques. Crosswell Seismic. Difference between radiological and seismic tomography. Seismic wave propagation. Ray theory for seismic waves. Ray tracing algorithms. Representation of structure. Ray path and travel time calculation. Hypocenter-velocity structure coupling problem. Inversion methods of travel times. Investigation of the solution quality. |
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| Course Syllabus | | Week | Subject | Related Notes / Files | | Week 1 | Introduction of tomography | | | Week 2 | History of tomography. Medical Tomography | | | Week 3 | A few examples of using tomography: Petrophysics, Croswell, Ocean Acustic, Whole Earth Geophysics | | | Week 4 | Transform Techniques | | | Week 5 | Series Expansion Techniques | | | Week 6 | Cenrtal Slice Theory. Differences and similarities between radiolojical tomography and seismic tomography. | | | Week 7 | Seismic wave propagation in the earth. Ray theory. | | | Week 8 | Mid-term exam | | | Week 9 | Representing methods of the earth structure | | | Week 10 | Calculation of the raypaths and travel-times | | | Week 11 | Simultaneous inversion for the velocity-source parameters | | | Week 12 | Inversion methods of the travel-times | | | Week 13 | Inversion methods of the travel-times | | | Week 14 | Comparasion of the various seismic tomography methods.Assessment of the obtained tomographic results.Computer simulation of a seismic tomograph study. | | | Week 15 | Make-up lesson | | | Week 16 | End-of-term exam | | | |
| 1 | Iyer, H.M., and K. Hirahara (Eds.), 1993. Seismic Tomography Theory and Practice, Chapman Hall, New York. | | | 2 | Stewart, R, R. 1992. Exploration Seismic Tomography: Fundementals. | | | |
| 1 | Claerbout, J., 1985. Imaging the Earths Interior, Blackwell Scientific.Claerbout, J., 1992. Earth Sounding Analysis, Blackwell Scientific. | | | 2 | Guust Nolet (Ed.), 1986, Seismic tomography, with applications in global seismology and exploration geophysics, D. Reidel publishing company. | | | 3 | Natterer, F., 1986, The mathematics of computerized tomography, J. Wiley and Sons Ltd., and B.G. Teubner. | | | 4 | Kissling, E., Elsworth, W.L., Eberhart-Phillips, D. and Kradofler, U. (1994) Initial referencemodels in seismic tomography, J. Geophys. Res., 99: 19.635-19.646 | | | 5 | Menke, 1984.Geophysical Data Analysis: Discrete Inverse Theory. revised ed. Academic Press Inc., New York. | | | 6 | Scales et al., 1990.Regularization of nonlinear inverse problems: imaging the near-surface weathering layer. Inverse Problems. v6. 115-131. | | | 7 | Paige and Saunders, 1982.LSQR: an algorithm for sparse linear equations and sparse least squares. ACM Transactions on Mathematical Software. v8. 43-71. | | | 8 | Tarantola, A., Inverse Problem Theory and Methods for Model Parameter Estimation, SIAM,Philadelphia, Penn., 2005. | | | |
| Method of Assessment | | Type of assessment | Week No | Date | Duration (hours) | Weight (%) | | Mid-term exam | 8 | | 1,50 | 30 | | In-term studies (second mid-term exam) | 13 | | 1,30 | 20 | | End-of-term exam | 16 | | 2 | 50 | | |
| Student Work Load and its Distribution | | Type of work | Duration (hours pw) | No of weeks / Number of activity | Hours in total per term | | Yüz yüze eğitim | 4 | 14 | 56 | | Uygulama | 3 | 5 | 15 | | Ödev | 3 | 2 | 6 | | Kısa sınav | 2 | 1 | 2 | | Total work load | | | 79 |
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