Gluon Propagator on Coarse Lattices in Laplacian Gauges

The Laplacian gauge is a nonperturbative gauge fixing that reduces to Landau gauge in the asymptotic limit. Like Landau gauge, it respects Lorentz invariance, but it is free of Gribov copies; the gauge fixing is unambiguous. In this paper we study the infrared behavior of the lattice gluon propagator in Laplacian gauge by using a variety of lattices with spacings from $a = 0.125$ to 0.35 fm, to explore finite volume and discretization effects. Three different implementations of the Laplacian gauge are defined and compared. The Laplacian gauge propagator has already been claimed to be insensitive to finite volume effects and this is tested on lattices with large volumes.Comment: RevTex 4.0, 14 pages, 9 colour figures; Correction to Reference

Electrical switching and memory phenomena observed in redox-gradient dendrimer sandwich devices

We report on the fabrication of dendrimer sandwich devices with electrical switching and memory properties. The storage media is consisted of a redox-gradient dendrimer layer sandwiched in organic barrier thin films. The dendrimer layer acts as potential well where redox-state changes and consequent electrical transitions of the embedded dendrimer molecules are expected to be effectively triggered and retained, respectively. Experimental results indicated that electrical switching could be reproducibly obtained in such dendrimer sandwiches upon a threshold bias voltage. After switching, the device conductivity could be increased more than three orders of magnitude, which can keep stable for several days in ambient conditions. Our work demonstrates the possibility of using solid-state redox-gradient dendrimer films as hopeful information storage media.Comment: 13 pages, 5 figures, 1 table, unpublished manuscrip

Atenolol versus losartan in children and young adults with Marfan's syndrome

BACKGROUND : Aortic-root dissection is the leading cause of death in Marfan's syndrome. Studies suggest that with regard to slowing aortic-root enlargement, losartan may be more effective than beta-blockers, the current standard therapy in most centers. METHODS : We conducted a randomized trial comparing losartan with atenolol in children and young adults with Marfan's syndrome. The primary outcome was the rate of aortic-root enlargement, expressed as the change in the maximum aortic-root-diameter z score indexed to body-surface area (hereafter, aortic-root z score) over a 3-year period. Secondary outcomes included the rate of change in the absolute diameter of the aortic root; the rate of change in aortic regurgitation; the time to aortic dissection, aortic-root surgery, or death; somatic growth; and the incidence of adverse events. RESULTS : From January 2007 through February 2011, a total of 21 clinical centers enrolled 608 participants, 6 months to 25 years of age (mean [+/- SD] age, 11.5 +/- 6.5 years in the atenolol group and 11.0 +/- 6.2 years in the losartan group), who had an aorticroot z score greater than 3.0. The baseline-adjusted rate of change (+/- SE) in the aortic-root z score did not differ significantly between the atenolol group and the losartan group (-0.139 +/- 0.013 and -0.107 +/- 0.013 standard-deviation units per year, respectively; P = 0.08). Both slopes were significantly less than zero, indicating a decrease in the degree of aortic-root dilatation relative to body-surface area with either treatment. The 3-year rates of aortic-root surgery, aortic dissection, death, and a composite of these events did not differ significantly between the two treatment groups. CONCLUSIONS : Among children and young adults with Marfan's syndrome who were randomly assigned to losartan or atenolol, we found no significant difference in the rate of aorticroot dilatation between the two treatment groups over a 3-year period

Benchmarks for Academic Oncology Faculty

The role of clinical researchers is vital to cancer progress. The teaching, research, and leadership roles that academic oncologists hold need to be accounted for and appropriately compensated. National metrics are currently inexistent, but are necessary to move the oncology research field forward. Clinical research and routine clinical care must be harmoniously integrated without competing. This article reviews the national landscape of clinical cancer research and proposes a call for action

Communication and mutual resource exchange in north Florida hermit crabs

The patterns of shell exchange in three species of hermit crabs which overlap in distribution and shell use were observed in the laboratory. Crabs showed no tendency to initiate more exchanges with conspecifics as compared with nonconspecific individuals and there were no specific size dominance effects. Lack of common communicatory patterns between Clibararius vittatus and Pagurus pollicaris was correlated with minimal actual exchange, while Pagurus impressus exchanged with both species and executed patterns in common with both. The pattern of shell exchanges and preferences indicated that, in some cases, both individuals may gain in interspecific exchanges.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/46904/1/265_2004_Article_BF00569198.pd

Description of a new western Atlantic species of Argeia Dana with a proposed new subfamily for this and related genera (Crustacea Isopoda, Bopyridae)

INTRODUCTION Recently, material representing an undescribed species of the genus Argeia Dana in the western Atlantic, the first record of that genus from this ocean, became available to me. The previous records of Argeia are of 4 species in the Pacific, including one whose range extends around the entire northern Pacific, and one from the Indian Ocean. Two of the species, though, represented systematic problems which it was necessary to resolve. At the same time, 4 other genera, Parargeia Hansen, Bopyrosa Nierstrasz & Brender à Brandis, Stegoalpheon Chopra and Argeiopsis Kensley, are clearly related to Argeia, but it has been difficult to assign any of them to currently recognized bopyrid subfamilies. Thus a new subfamily containing these 5 genera is proposed herein. ACKNOWLEDGMENTS Prof. Dr. L. B. Holthuis of the Rijksmuseum van Natuurlijke Historie, Leiden (RMNHL), identified and provided to me the parasitized specimens of Sclerocrangon jacqueti which had been collected by the University of Miami's R/V "Columbus Iselin". He also arranged for me to borrow a further specimen of the same species which had been taken by the Michael Sars Expedition and was housed in the Zoological Museum of the University of Bergen, Norway (designated ZMBU), and he tried to locate the typematerial of Bopyrosa phryxiformis for me. Further, he provided a list of the currently accepted names for all of the recorded host species. Dr. W. Lee of the California Academy of Sciences, San Francisco (CAS) allowed me to examine specimens in his collection assigned to Argeia pauperata, and Dr. F. G. Hochberg of the Santa Barbara Museum of Natural History, California (SBMNH) allowed me to examine specimens from his collection and furnished collection data for them. Dr. T. E. Bowman of th