Exact spectra, spin susceptibilities and order parameter of the quantum Heisenberg antiferromagnet on the triangular lattice. Abstract Exact spectra of periodic samples are computed up to N = 36. Evidence of an extensive set of low lying levels, lower than the softest magnons, is exhibited. These low lying quantum states are degenerated in the thermodynamic limit; their symmetries and dynamics ...

The notion that some people are more vulnerable to adversity as a function of inherent risk characteristics is widely embraced in most fields of psychology. This is reflected in the popularity of the diathesis-stress framework, which has received a vast amount of empirical support over the years. Much less effort has been directed toward the investigation of endogenous factors associated with v...

In this paper we examine the relationships among diathesis alternations, the semantics of verbs, and the referential status of NPs. Some diathesis shifts are argued to involve changes in the semantic type of NP arguments, including possible alternations between ‘referential’ NPs and ‘property-type’ NPs. We explore applications of this approach to alternations of Genitive and Accusative, both wi...

A case of septicemia caused by vancomycin-resistant Pediococcus acidilactici is discussed. This appears to be the first reported case of septicemia caused by this organism. The characteristics and antimicrobial susceptibilities of this organism are described.

We introduce topological methods for quantifying spatially heterogeneous dynamics, and use these tools to analyze particle-tracking data for a quasi-two-dimensional granular system of air-fluidized beads on approach to jamming. In particular, we define two overlap order parameters, which quantify the correlation between particle configurations at different times, based on a Voronoi construction...

OBJECTIVE To describe the opinion of schoolage children, from a public school, regarding the violence they perceive in the media. MATERIAL AND METHODS Descriptive-exploratory research with a sample, selected according to the child's age in a public school. Quantitative data were collected. RESULTS There were found common issues related to the child's opinion about the violence present in th...

this was the first Keystone symposium organized in the area of environ mental epigenetics. the meeting brought together a broad group of scientists research­ ing topics as diverse as epidemi ology, toxi­ cology, clinical medicine, mol ecular and cellular biology, and epigenetics. the meet­ ing was organized by randy Jirtle (Duke u., uSa), Moshe Szyf (Mcgill u., canada), and Frederick tyson (NiE...

Dupuytren’s disease is a benign fibroproliferative disease of unknown aetiology. It is often familial and commonly affects Northern European Caucasian men, but genetic studies have yet to identify the relevant genes. Transforming growth factor beta one (TGF1) is a multifunctional cytokine which plays a central role in wound healing and fibrosis. It stimulates the proliferation of fibroblasts an...

While modernization has dramatically increased lifespan, it has also witnessed the increasing prevalence of diseases such as obesity, hypertension, and type 2 diabetes. Such chronic, acquired diseases result when normal physiologic control goes awry and may thus be viewed as failures of homeostasis. However, while nearly every process in human physiology relies on homeostatic mechanisms for sta...

Genetic factors clearly cause Lewy-body Parkinson's disease (PD) in a subset of autosomal-dominant families. However, most cases of PD are sporadic. The two most likely models of four discussed for sporadic PD are the reduced penetrance model and the multifactorial model. Sporadic PD is likely to be caused by the combined effect of environmental precipitating factors and genetic susceptibility ...