Forging Insights: Indian Agency Blacksmiths of the American Frontier

Following the War of 1812, the United States government sought to more directly deal with the Native tribes in the American interior. The establishment of Indian agency blacksmith shops was one significant component of this endeavor. While it remains a virtually untouched topic in scholarship, the analysis of agency blacksmith services may reveal significant historical insights within topics as diverse as ethnic perception, material culture, frontier government practices, and language dynamics during a time of great upheaval. This case study of the blacksmith shop at the Fort Winnebago sub-agency in pre-state Wisconsin seeks to demonstrate the manner in which these institutions provide new opportunities for a better understanding of the cultural and political dynamics of the American frontier

Operation Barbarossa Interpreted in Light of the Primacy of Stalin\u27s Economic Plan and Trade with Germany

The controversy over who was the aggressor behind Operation Barbarossa, Hitler’s 1941 attack on the Soviet Union, has focused largely on political and military analyses. However, a study of Soviet economics sheds critical light on this debate. The success of Joseph Stalin’s regime rested squarely upon a foundation of economic growth. In the late 1930s, he viewed trade with Germany as the way to achieve his capital investment objectives. Any economic gains proffered by Stalin’s Third Five-Year Plan would be threatened by the prospect of war. Thus, Stalin tenaciously held to his non-aggression pact with Germany. It is the contention of this paper that, due to the primacy of Stalin’s economic plan involving trade with Germany, Stalin had no intent to violate the Molotov-Ribbentrop agreement. Hitler’s attack was aggressive, not preemptive

Linear-in-mass-ratio contribution to spin precession and tidal invariants in Schwarzschild spacetime at very high post-Newtonian order

Using black hole perturbation theory and arbitrary-precision computer algebra, we obtain the post-Newtonian (pN) expansions of the linear-in-mass-ratio corrections to the spin-precession angle and tidal invariants for a particle in circular orbit around a Schwarzschild black hole. We extract coefficients up to 20pN order from numerical results that are calculated with an accuracy greater than 1 part in $10^{500}$. These results can be used to calibrate parameters in effective-one-body models of compact binaries, specifically the spin-orbit part of the effective Hamiltonian and the dynamically significant tidal part of the main radial potential of the effective metric. Our calculations are performed in a radiation gauge, which is known to be singular away from the particle. To overcome this irregularity, we define suitable Detweiler-Whiting singular and regular fields in this gauge, and we devise a rigorous mode-sum regularization method to compute the invariants constructed from the regular field

British Motives in the Settlement of German Palatines in Colonial New York

In 1710, a group of German Palatine refugees landed in the New World courtesy of Britain’s Queen Anne. While British propaganda boasted charitable and religious motives behind the Palatine relocation to America—particularly in light of the Catholic-Protestant feud gripping Europe at that time—the historical record paints an alternative picture. Based on the evidence, the move was predominantly an act of convenience and profit to the Crown. Britain had a need to remove excess poor from its midst, make its northerly Colonies profitable, and ensure Colonial security in the face of Iroquois threat. England viewed the Palatines as an ethnically homogenous people whom they could exploit to meet these economic and security needs

Traveling fronts in active-passive particle mixtures

The emergent dynamics in phase-separated mixtures of isometric active and passive Brownian particles is studied numerically in two dimensions. A novel steady-state of well-defined traveling fronts is observed, where the interface between the dense and the dilute phase propagates and the bulk of both phases is (nearly) at rest. Two kind of interfaces, advancing and receding, are formed by spontaneous symmetry breaking, induced by an instability of a planar interface due to the formation of localized vortices. The propagation arises due to flux imbalance at the interface, strongly resembling traveling fronts in reaction-diffusion systems. Above a threshold, the interface velocity decreases linearly with increasing fraction of active particles.Comment: 5 pages, 4 figure

Diffusion of Competing Innovations: The Effects of Network Structure on the Provision of Healthcare

Medical innovations, in the form of new medication or other clinical practices, evolve and spread through health care systems, impacting on the quality and standards of health care provision, which is demonstrably heterogeneous by geography. Our aim is to investigate the potential for the diffusion of innovation to influence health inequality and overall levels of recommended care. We extend existing diffusion of innovation models to produce agent-based simulations that mimic population-wide adoption of new practices by doctors within a network of influence. Using a computational model of network construction in lieu of empirical data about a network, we simulate the diffusion of competing innovations as they enter and proliferate through a state system comprising 24 geo-political regions, 216 facilities and over 77,000 individuals. Results show that stronger clustering within hospitals or geo-political regions is associated with slower adoption amongst smaller and rural facilities. Results of repeated simulation show how the nature of uptake and competition can contribute to low average levels of recommended care within a system that relies on diffusive adoption. We conclude that an increased disparity in adoption rates is associated with high levels of clustering in the network, and the social phenomena of competitive diffusion of innovation potentially contributes to low levels of recommended care.Innovation Diffusion, Scale-Free Networks, Health Policy, Agent-Based Modelling

A test of Gaia Data Release 1 parallaxes: implications for the local distance scale

We present a comparison of Gaia Data Release 1 (DR1) parallaxes with photometric parallaxes for a sample of 212 Galactic Cepheids at a median distance of 2~kpc, and explore their implications on the distance scale and the local value of the Hubble constant H_0. The Cepheid distances are estimated from a recent calibration of the near-infrared Period-Luminosity P-L relation. The comparison is carried out in parallax space, where the DR1 parallax errors, with a median value of half the median parallax, are expected to be well-behaved. With the exception of one outlier, the DR1 parallaxes are in remarkably good global agreement with the predictions, and the published errors may be conservatively overestimated by about 20%. The parallaxes of 9 Cepheids brighter than G = 6 may be systematically underestimated, trigonometric parallaxes measured with the HST FGS for three of these objects confirm this trend. If interpreted as an independent calibration of the Cepheid luminosities and assumed to be otherwise free of systematic uncertainties, DR1 parallaxes would imply a decrease of 0.3% in the current estimate of the local Hubble constant, well within their statistical uncertainty, and corresponding to a value 2.5 sigma (3.5 sigma if the errors are scaled) higher than the value inferred from Planck CMB data used in conjunction with Lambda-CDM. We also test for a zeropoint error in Gaia parallaxes and find none to a precision of ~20 muas. We caution however that with this early release, the complete systematic properties of the measurements may not be fully understood at the statistical level of the Cepheid sample mean, a level an order of magnitude below the individual uncertainties. The early results from DR1 demonstrate again the enormous impact that the full mission will likely have on fundamental questions in astrophysics and cosmology.Comment: A&A, submitted, 6 pages, 3 figure