This report covers a theoretical and experimental investigation on magnetic fields caused by eddy currents of spherically conducting objects. These eddy currents are caused by a time-varying...Show moreThis report covers a theoretical and experimental investigation on magnetic fields caused by eddy currents of spherically conducting objects. These eddy currents are caused by a time-varying magnetic field. First, the magnetic field is determined analytically from the Maxwell’s equations. Then an experiment is done to measure this magnetic field. By comparing the theoretical and experimental results, one can determine the material properties such as the conductivity σ and relative permeability μ_r. For a solid aluminum sphere the experiment gave σ = 4.75 · 10^7 S/m while the theoretical value is 3.767 · 10^7 S/m, thus differing by 26%. For the spherical steel shell, we found σ = 5 · 10^6 S/m and μ_r = 200. This is approximately the same as the estimated theoretical values for hull steel which has σ = 5 · 10^6 S/m and μ_r = 250.Show less
This thesis provides an analysis of three marginal historical movements from the inter-war period in the 20th century; German neocolonialism, Japanese Pan-Asianism and Pan-Africanism. All three...Show moreThis thesis provides an analysis of three marginal historical movements from the inter-war period in the 20th century; German neocolonialism, Japanese Pan-Asianism and Pan-Africanism. All three movements represent trends that present alternative views of the dominant ideologies of the century which they were ultimately suppressed by with the onset of the Second World War. Based on what documentation they left behind however, a model can be constructed that attempts to explain how these movements could have survived or otherwise have seen a resurgence in the absence of global liberalism and communism. Alternative histories found in video games, such as the popular Hearts of Iron IV expansion made by its (non-academic) community The New Order: Last Days of Europe provide an opportunity to put this model into practice, but the shortcomings in its existing narrative regarding Africa must first be addressed.Show less
