Measurements of the neutron electric to magnetic form factor ratio G_(En)/G_(Mn) via the ^2H(e, e'n)^1H reaction to Q^2 = 1.45 (GeV/c)^2

We report values for the neutron electric tomagnetic form factor ratio,G_(En)/G_(Mn), deduced frommeasurements of the neutron’s recoil polarization in the quasielastic ^2H(e, e'n)^1H reaction, at three Q^2 values of 0.45, 1.13, and 1.45 (GeV/c)^2. The data at Q^2 = 1.13 and 1.45 (GeV/c)^2 are the first direct experimental measurements of G_(En) employing polarization degrees of freedom in the Q^2 > 1 (GeV/c)^2 region and stand as the most precise determinations of G_(En) for all values of Q^2

When Stuff Becomes Art: The Protection of Contemporary Art Through the Elimination of VARA’s Public-Presentation Exception

The Visual Artists Rights Act of 1990 (VARA) grants an artist the broad power to “prevent any intentional distortion, mutilation, or other modification of the work which would be prejudicial to [the artist’s] honor or reputation.” This right is significantly circumscribed, however, by VARA’s public-presentation exception, which states that a modification “which is the result . . . of the public presentation, including lighting and placement, of the work is not a destruction, distortion, mutilation, or other modification” that would otherwise violate VARA. This Note argues that the public-presentation exception is injudicious in light of the rise of the contemporary art movement. Much more than artists of earlier movements, contemporary artists rely on precise arrangement of elements and engagement with the physical space surrounding these elements in the creation of a work of art. Yet it is control over those critical contextual elements, arguably the most critical element of a contemporary work, that VARA explicitly denies to the contemporary artist. The public-presentation exception threatens more than just the personal interests of artists—a greater societal interest in preserving authentic cultural heritage for future generations is continually undermined as long as the public-presentation exception remains codified in VARA. Lasting protection of the integrity of works of contemporary art thus requires the elimination of the public-presentation exception

The Super Bigbite Project: a Study of Nucleon Form Factors

A proposed set of instrumentation, collectively referred to as the Super Bigbite project, is presented. Used in three different configurations it will allow measurements of three nucleon electromagnetic form factors GEn, GEp, and GMn with unprecedented precision to Q2-values up to three times higher than existing data

An overview of neV probes of PeV scale physics --- and of what's in between

Low-energy experiments which would identify departures from the Standard Model (SM) rely either on the unexpected observation of symmetry breaking, such as of CP or B, or on an observed significant deviation from a precise SM prediction. We discuss examples of each search strategy, and show that low-energy experiments can open windows on physics far beyond accessible collider energies. We consider how the use of a frequentist analysis framework can redress the impact of theoretical uncertainties in such searches --- and how lattice QCD can help control them.Comment: 6 pages, 2 figures, prepared for the proceedings of MENU 2013, the 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, Rome, Sept. 30 - Oct. 4, 201

Repurposing human α-defensin 6, an antimicrobial peptide, as a beta amyloid inhibitor

Amyloid aggregation and microbial infection have been identified as the two main pathological risk factors that can result in amyloid diseases such as Alzheimer’s disease (AD), type II diabetes, and Parkinson’s disease. These two risk factors have been well studied separately, however only targeting one of these risk factors has shown to not be successful in preclinical trials since amyloid diseases are multifactorial. In this study, a new approach has been proposed to determine the effects of an antimicrobial and anti-amyloid aggregation approach by looking at the inhibition abilities of a heterocomplex of human α-defensin 6 (HD-6), whose secondary structure is rich in β-sheets, with beta amyloid (Aβ, associated with AD). Experimental results from thioflavin T assays, circular dichroism spectroscopy, atomic force microscopy, and cell and bacteria assays demonstrate that HD-6 could (1) prevent the aggregation and misfolding of amyloid peptides, (2) reduce cell toxicity due to amyloid peptides, and (3) retain its antimicrobial function after forming these heterocomplexes. Therefore, this study provides a new approach of repurposing an antimicrobial peptide as an amyloid inhibitor by blocking two interlinked pathological pathways and thus taking advantage of the dual functions of antimicrobial peptides to combat both amyloid aggregation and microbial infection

Decorating the Neolithic: an Evaluation of the Use of Plaster in the Enhancement of Daily Life in the Middle Pre-pottery Neolithic B of the Southern Levant

During the Middle Pre-pottery Neolithic B in the southern Levant the use of lime plaster in both ritual and domestic contexts increased significantly relative to previous periods. Its properties of whiteness, purity, plasticity and antisepsis would have made it a natural choice for decorating, and through the act of colouring disparate categories of objects were linked together. Plaster appears to have transcended its own inherent value as a material due to its interconnectedness with mortuary ritual. Because of its ubiquity, this socially ascribed value was accessible to everyone. This article will claim that plaster, and the act of plastering both ritual and domestic contexts played a key role in the creation and maintenance of community cohesion and social well-being

The effect of external surface properties on the thermal behaviour of a transparently insulated wall

The properties of transparent plaster covering transparent insulation materials (TIM) were investigated using a whole building simulation program (ESP-r). The outer plaster was made from glass balls of different diameter, glued together with synthetic resin. The transmittance of the whole transparent covering layer (plaster + TIM) was estimated for different solar incident angles by laboratory measurements. The innovative character of the materials required refining of ESP-r's optical database in order to take into account these new characteristics. The transparently insulated building facade was proposed as a solar energy storage system. The results of the initial analysis showed the desirable optical properties, estimated for sun incident angles on the façade at a latitude of 52 degrees north. Then, simulations based on real climatic data for Central Europe were conducted to predict the thermal TIM wall behaviour. The influence of the structure on the diurnal heat storage potential was investigated for selected periods of the year