A New Symmetry for QED

We demonstrate that QED exhibits a previously unobserved symmetry. Some consequences are discussed.Comment: 9 pages, MZ-TH/93-02, DIAS-STP-93-0

Efficacy of a four-week uphill sprint training intervention in field hockey players

Current evidence increasingly suggests that very short, supra-maximal bouts of exercise can have significant health and performance benefits. The majority of research conducted in the area however, uses laboratory-based protocols, which can lack ecological validity. The purpose of this study was to examine the effects of a high intensity sprint-training programme on hockey related performance measures. 14 semi-professional hockey players completed either a 4-week high intensity training (HIT) intervention, consisting of a total of six sessions HIT, which progressively increased in volume (n=7), or followed their normal training programme (Con; n=7). Straight-line sprint speed with and without a hockey stick and ball, and slalom sprint speed, with and without a hockey stick and ball were used as performance indicators. Maximal sprint speed over 22.9m was also assessed. Upon completion of the four-week intervention, straight-line sprint speed improved significantly in the HIT group (~3%), with no change in performance for the Con group. Slalom sprint speed, both with and without a hockey ball was not significantly different following the training programme in either group. Maximal sprint speed improved significantly (12.1%) in the HIT group, but there was no significant performance change in the Con group. The findings of this study indicate that a short period of HIT can significantly improve hockey related performance measures, and could be beneficial to athletes and coaches in field settings

From head to tail it's a 2 way street for neuro-immune communication

Animals need to be able to rapidly and effectively respond to changes in their external and internal environment. To achieve this the nervous and immune systems need to coordinate their responses, integrating multiple cues including presence of potential pathogens, and availability of food. In our recent study we demonstrate that signaling by sensory neurons in the head using the classical neurotransmitter serotonin can negatively regulate the rectal epithelial immune response upon infection of C. elegans with the naturally occurring bacterial pathogen Microbacterium nematophilum (M. nematophilum). The complicated nature of the mammalian brain and immune system has made it difficult to identify the molecular mechanisms mediating these interactions. With its simple, well described, nervous system and a rapidly growing understanding of its immune system, C. elegans has emerged as an excellent model to study the mechanisms by which animals recognize pathogens and coordinate behavioral and cellular immune responses to infection

Quantumness in decoherent quantum walk using measurement-induced disturbance

The classicalization of a decoherent discrete-time quantum walk on a line or an n-cycle can be demonstrated in various ways that do not necessarily provide a geometry-independent description. For example, the position probability distribution becomes increasingly Gaussian, with a concomitant fall in the standard deviation, in the former case, but not in the latter. As another example, each step of the quantum walk on a line may be subjected to an arbitrary phase gate, without affecting the position probability distribution, no matter whether the walk is noiseless or noisy. This symmetry, which is absent in the case of noiseless cyclic walk, but is restored in the presence of sufficient noise, serves as an indicator of classicalization, but only in the cyclic case. Here we show that the degree of quantum correlations between the coin and position degrees of freedom, quantified by a measure based on the disturbance induced by local measurements (Luo, Phys. Rev. A 77, 022301 (2008)), provides a suitable measure of classicalization across both type of walks. Applying this measure to compare the two walks, we find that cyclic quantum walks tend to classicalize faster than quantum walks on a line because of more efficient phase randomization due to the self-interference of the two counter-rotating waves. We model noise as acting on the coin, and given by the squeezed generalized amplitude damping (SGAD) channel, which generalizes the generalized amplitude damping channel.Comment: 8 pages with 8 figures, Published versio

Physical charges in QED and QCD

Talk given at the International Workshop on QCD Green's Functions, Confinement and Phenomenology, September 7-11 2009, ECT Trento, Italy. 8 pages, 3 pdf figures. V2: references added, to appear in PoSWe show that the `dressing' approach, which describes physical charges as gauge invariant composites of matter and clouds of gauge bosons, arises naturally in gauge theories. We give perturbative examples of dressings for both asymptotic charges and for states in which the fields are confined to a compact volume as is required, for example, by causality in pair creation. In QCD, we use dressed states to demonstrate explicitly how Gribov copies obstruct the non-perturbative construction of colour charges

Swan oats

SWAN OATS is the highest yielding oat variety now available in Western Australia. The quality of its grain for milling is the equal of Ballidu. As stockfeed the grain of Swan should be equal to Ballidu and superior to Avon, particularly in the lower rainfall areas

Oat variety trials, 1965

M l 2 8 , an early midseason fixed crossbred bred at the Merredin Research Station, Avon and P8304, a late midseason fixed crossbred from N.S.W, were the highest yielding oats in last year\u27s trials. Irwin was the highest yielding oat of early maturity

Barley variety trials, 1964

The most promising varieties in last year\u27s trials were the 2 row crossbreds W44 and W45 and the 6 row white grained variety Atlas 57. BARLEY variety trials were located on four Research Stations and on farmers\u27 properties at Northampton, Tammin and Mt. Barker. Brief details of the characteristics of the varieties and crossbreds under test were given in a previous article

Oat variety trials, 1964

AVON and the new fixed crossbred from N.S.W., * P8304, were the highest yielding oats in the last season\u27s trials. These are of midseason maturity. The highest yielding oats of early maturity were Irwin and Kent

Barley variety trials, 1965

The highest yielding varieties in the 1965 barley variety trials were the two-row crossbred A l l , the white grained six-row varieties Arivat, Gem and Glacier and the recently-named two-row variety Dampier (previously known as W45)