lheagy

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Copyright (c) 2016 Lindsey Heagy

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lheagy

:uid: OrganizingDerivs

lheagy

:uid: PSfdem :title: Primary-Secondary Approaches for Frequency Domain Maxwell :description: 1+1=2, but sometimes it is more useful to think of 2=a+b where a=... :tooltip:/img/twoab :tag: em,fdem,finite volume,primary-secondary :group: simpeg :license: CC-BY-4.0 :source: https://api.github.com/gists/b10a48dfea9af70aeb52

When solving any math or physics problem, there are usually a few tricks that can take you a long ways. Some of the favorites are: multiplying by 1 (or the identity), adding zero, and breaking things up in to sums (i.e. 2 = a+b, where a=1). I am sure these will be recurring themes among our articles. Here, I am going to spend some time on last point in the context of the frequency domain Maxwell's equations. In this case, 2 = a+b goes by the name of Primary-Secondary. I will develop this for the frequency domain electromagnetic (FDEM) problem, but keep in mind that it is quite general.

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:uid: HJformulation :title: Implementations of Frequency Domain Maxwell in simpegEM :description: Implementing the E-B and H-J forumlations of Maxwell's Equations in the Frequency Domain :tooltip: /img/ebjhdiscretizations :tag: em,fdem,finite volume :group: simpeg :license: CC-BY-4.0 :source: https://api.github.com/gists/bff38224e409b4d6eae9

This past week, I worked on implementing the H-J formulation of Maxwell's equations (in the Frequency Domain) in simpegEM. So for this week's journal, I thought I would write about the 4 different approaches we have implemented for solving the FDEM problem.

lheagy

:uid: anisotropic-conductivity :title: Anisotropic Conductivity :description: when electrical conductivity varies with direction :tooltip: None :tag: conductivity,anisotropy,dc,em,physical properties :group: simpeg :license: CC-BY-4.0 :source: https://api.github.com/gists/56c47e9a872aa908705d

When a physical property of a material varies with direction, that

lheagy

:uid: ipython-as-a-teaching-tool :title: IPython Notebook as a Teaching Tool :description: Using the iPython notebook to explore a normal incidence seismogram :tooltip: /img/IPython-Seismic-Tooltip.png :tag: education,ipython,seismic :group: simpeg :license: CC-BY-4.0 :source: https://api.github.com/gists/5213fad87fe4be9d0887

Last fall I was a part of a TA team (along with Mr. Seogi Kang!) for my supervisor's undergrad geophysics course.

lheagy

lheagy

import numpy as np
import matplotlib.pyplot as plt



def syntheticSeismogram(v, rho, d, wavtyp, wavf, usingT):
    """
    function syntheticSeismogram(v, rho, d, wavtyp, wavf, usingT)

    syntheicSeismogram generates and displays a synthetic seismogram for