Parallel integer relation detection: techniques and applications

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Freedmen with Firearms: White Terrorism and Black Disarmament During Reconstruction

The outcome of the Civil War brought freedom to over six million slaves of African descent. These Freedmen communities remained a critical source of labor for the agrarian based economy of the southern U.S. Conflicts erupted because former slaves sought to exercise their new freedoms against the restrictions placed on them by local authorities. New laws, mob actions and acts of organized white terrorism were used to subjugate free citizens and return them to their former stations of labor. Political activities and participation in the electoral process were violently discouraged. Vocal opponents of the new system were often targeted for murder along with their families. A vital component to this oppressive movement was a concerted effort among local southern governments to disarm African American citizens. Radical Republicans attempted to intercede with new laws based on 2nd amendment protections, but Northern indifference to the plight of former slaves made this politically futile. Unconstitutional firearm restrictions in the reconstruction south ensured that the subjugation of Freedmen would continue indefinitely. Without political agency, or the means of an organized community militia to generate such power, the realization of freedom and the rights of citizenship for African Americans remained unobtainable for nearly 100 years

Does the current minimum validate (or invalidate) cycle prediction methods?

This deep, extended solar minimum and the slow start to Cycle 24 strongly suggest that Cycle 24 will be a small cycle. A wide array of solar cycle prediction techniques have been applied to predicting the amplitude of Cycle 24 with widely different results. Current conditions and new observations indicate that some highly regarded techniques now appear to have doubtful utility. Geomagnetic precursors have been reliable in the past and can be tested with 12 cycles of data. Of the three primary geomagnetic precursors only one (the minimum level of geomagnetic activity) suggests a small cycle. The Sun's polar field strength has also been used to successfully predict the last three cycles. The current weak polar fields are indicative of a small cycle. For the first time, dynamo models have been used to predict the size of a solar cycle but with opposite predictions depending on the model and the data assimilation. However, new measurements of the surface meridional flow indicate that the flow was substantially faster on the approach to Cycle 24 minimum than at Cycle 23 minimum. In both dynamo predictions a faster meridional flow should have given a shorter cycle 23 with stronger polar fields. This suggests that these dynamo models are not yet ready for solar cycle prediction.Comment: SOHO 23 Workshop (SOHO-23: Understanding a Peculiar Solar Minimum, Northeast Harbor, ME, USA, 2009 September 21-25) Invited Paper, 8 pages, 9 figures