Manipulation and Control Complexity of Schulze Voting

Schulze voting is a recently introduced voting system enjoying unusual popularity and a high degree of real-world use, with users including the Wikimedia foundation, several branches of the Pirate Party, and MTV. It is a Condorcet voting system that determines the winners of an election using information about paths in a graph representation of the election. We resolve the complexity of many electoral control cases for Schulze voting. We find that it falls short of the best known voting systems in terms of control resistance, demonstrating vulnerabilities of concern to some prospective users of the system

Derivations of negative degree on quasihomogeneous isolated complete intersection singularities

J. Wahl conjectured that every quasihomogeneous isolated normal singularity admits a positive grading for which there are no derivations of negative weighted degree. We confirm his conjecture for quasihomogeneous isolated complete intersection singularities of either order at least 3 or embedding dimension at most 5. For each embedding dimension larger than 5 (and each dimension larger than 3), we give a counter-example to Wahl's conjecture.Comment: 11 page

A common behavior in the late X-ray afterglow of energetic GRB-SN systems

The possibility to divide GRBs in different subclasses allow to understand better the physics underlying their emission mechanisms and progenitors. The induced gravitational collapse scenario proposes a binary progenitor to explain the time-sequence in GRBs-SNe. We show the existence of a common behavior of the late decay of the X-ray afterglow emission of this subclass of GRBs, pointing to a common physical mechanism of their late emission, consistent with the IGC picture.Comment: 3 pages, to appear in the proceedings of the Gamma-Ray Burst Symposium 2012 - IAA-CSIC - Marbella, editors: Castro-Tirado, A. J., Gorosabel, J. and Park, I.

The Influence of the Pennsylvania Mainline of Public Works

The Pennsylvania Mainline of Public Works, authorized and begun by Governor John Andrew Schulze in 1826, was the main transportation artery across Pennsylvania from the beginning of its operations in 1828 until the Pennsylvania Railroad purchased it in 1857. Though it was only in service for about thirty years, the Mainline was instrumental in shaping and affecting individuals, both passengers and employees of the canal; as well as Pennsylvania towns such as Saltsburg, Alexandria, Pittsburgh, and Philadelphia. This in turn affected national commerce

Too retro for religion: Self-identity and the presence of God in the works of L. J. Smith and Bram Stoker

Since vampirism threatens the psychological stability of human beings, religion is utilized to combat vampires in Bram Stoker\u27s Dracula. Jutta Schulze alludes to a dominant discourse that establishes moral binaries through religion. However, when the presence of God is limited or non-existent, individuals within L. J. Smith\u27s Secret Vampire cannot rely on moral binaries to understand vampires. Instead, they must redefine their self-identity without Christian beliefs that would otherwise deem vampires unacceptable. Too Retro for Religion examines the exclusive nature presented by religious binaries in Victorian literature in comparison with the transformative human-vampire relationship in modern fiction

Search for bottleneck effects in Penna ageing and Schulze language model

No influence was seen when in two models with memory effects the populations were drastically decreased after equilibrium was established, and then allowed to increase again.Comment: RevTeX4, 2 pages, 2 figures with 3 eps file

J Med Entomol

As the primary vector of Lyme disease spirochetes and several other medically significant pathogens, Ixodes scapularis presents a threat to public health in the United States. The incidence of Lyme disease is growing rapidly in upper midwestern states, particularly Michigan, Minnesota, and Wisconsin. The probability of a tick bite, acarological risk, is affected by the phenology of host-seeking I. scapularis. Phenology has been well-studied in northeastern states, but not in the Upper Midwest. We conducted biweekly drag sampling across 4 woodland sites in Minnesota between April and November from 2015 to 2017. The majority of ticks collected were I. scapularis (82%). Adults were active throughout our entire 8-month collection season, with sporadic activity during the summer, larger peaks in activity observed in April, and less consistent and lower peaks observed in October. Nymphs were most active from May through August, with continuing low-level activity in October, and peak activity most commonly observed in June. The observed nymphal peak corresponded with the typical peak in reported human Lyme disease and anaplasmosis cases. These findings are consistent with previous studies from the Upper Midwest and highlight a risk of human exposure to I. scapularis at least from April through November. This information may aid in communicating the seasonality of acarological risk for those living in Minnesota and other upper midwestern states as well as being relevant to the assessment of the ecoepidemiology of Lyme disease and the modeling of transmission dynamics.CC999999/ImCDC/Intramural CDC HHSUnited States/U01 CK000490/CK/NCEZID CDC HHSUnited States/U01CK000490/ACL/ACL HHSUnited States/U50 CK000204/CK/NCEZID CDC HHSUnited States

Studies on Indian sponges—VII. Two new records and a new species of the genus Plakina Schulze (Carnosida :Halinidae) from the Indian region.

Of the three species belonging to the genus Plakina Schulze (1880) considered here, two {Plakina monolopha Schulze and P. triiopha Schulze) are new records from the Indian region and the third P. acantholopha is new to science

The Dynamical Fingerprint of Core Scouring in Massive Elliptical Galaxies

The most massive elliptical galaxies have low-density centers or cores that differ dramatically from the high-density centers of less massive ellipticals and bulges of disk galaxies. These cores have been interpreted as the result of mergers of supermassive black hole binaries, which depopulate galaxy centers by gravitationally slingshotting central stars toward large radii. Such binaries naturally form in mergers of luminous galaxies. Here, we analyze the population of central stellar orbits in 11 massive elliptical galaxies that we observed with the integral field spectrograph SINFONI at the European Southern Observatory Very Large Telescope. Our dynamical analysis is orbit-based and includes the effects of a central black hole, the mass distribution of the stars, and a dark matter halo. We show that the use of integral field kinematics and the inclusion of dark matter is important to conclude upon the distribution of stellar orbits in galaxy centers. Six of our galaxies are core galaxies. In these six galaxies, but not in the galaxies without cores, we detect a coherent lack of stars on radial orbits in the core region and a uniform excess of radial orbits outside of it: when scaled by the core radius, the radial profiles of the classical anisotropy parameter beta are nearly identical in core galaxies. Moreover, they match quantitatively the predictions of black hole binary simulations, providing the first convincing dynamical evidence for core scouring in the most massive elliptical galaxies.Comment: 8 pages, 3 figures, accepted by Ap