338 research outputs found
Parents\u27 Goals: An Analysis of Therapist Reasoning
Purpose:
Illustrate the use of DDDM to develop parent-identified goals for occupational therapy and to identify underlying sensory integration factors hypothesized to be impacting participation
Gauge and Lorentz transformation placed on the same foundation
In this note we show that a "dynamical" interaction for arbitrary spin can be
constructed in a straightforward way if gauge and Lorentz transformations are
placed on the same foundation. As Lorentz transformations act on space-time
coordinates, gauge transformations are applied to the gauge field. Placing
these two transformations on the same ground means that all quantized field
like spin-1/2 and spin-3/2 spinors are functions not only of the coordinates
but also of the gauge field components. This change of perspective solves a
couple of problems occuring for higher spin fields like the loss of causality,
bad high-energy properties and the deviation of the gyromagnetic ratio from its
constant value g=2 for any spin, as caused by applying the minimal coupling.
Starting with a "dynamical" interaction, a non-minimal coupling can be derived
which is consistent with causality, the expectation for the gyromagnetic ratio,
and well-behaved for high energies. As a consequence, on this stage the
(elektromagnetic) gauge field has to be considered as classical field.
Therefore, standard quantum field theory cannot be applied. Despite this
inconvenience, such a common ground is consistent with an old dream of
physicists almost a century ago. Our approach, therefore, indicates a
straightforward way to realize this dream.Comment: 12 pages, no figures, published version. arXiv admin note:
substantial text overlap with arXiv:0908.376
An Interprofessional, Tailored Behavioral Intervention for Sleep Problems in Autism: Use of Sensory Data to Inform Intervention
Purpose:
The purpose of this poster is to demonstrate how Sensory Profile data informed occupational therapy sleep interventions for two participants as part of an Interprofessional Tailored Behavioral Intervention study
Probing scalar particle and unparticle couplings in e+ e- -> t tbar with transversely polarized beams
In searching for indications of new physics scalar particle and unparticle
couplings in e^+ e^- \to t\bar t, we consider the role of transversely
polarized initial beams at e^+ e^- colliders. By using a general relativistic
spin density matrix formalism for describing the particles spin states, we find
analytical expressions for the squared amplitude of the process with t or \bar
t polarization measured, including the anomalous coupling contributions. Thanks
to the transversely polarized initial beams these contributions are first order
anomalous coupling corrections to the Standard Model (SM) contributions. We
present and analyse the main features of the SM and anomalous coupling
contributions. We show how differences between SM and anomalous coupling
contributions provide means to search for anomalous coupling manifestations at
future e^+ e^- linear colliders.Comment: 28 pages in LaTeX, including 7 encapsulated PostScript figures,
published versio
Brands in international and multi‐platform expansion strategies: economic and management issues
Powerful media branding has historically facilitated successful international expansion on the part of magazine and other content forms including film and TV formats. Multi-platform expansion is now increasingly central to the strategies of media companies and, as this chapter argues, effective use of branding in order to engage audiences effectively and to secure a prominent presence across digital platforms forms a core part of this. Drawing on original research into the experience of UK media companies, this chapter highlights some of the key economic, management and socio-cultural issues raised by the ever-increasing role of brands and branding in the strategies of international and multi-platform expansion that are increasingly common- place across media
The potential of trading activity income to fund third sector organisations operating in deprived areas
In the United Kingdom, as in other countries, Third Sector Organisations (TSOs) have been drawn towards income sources associated with trading activities (Teasdale, 2010), but many remain reliant on grant funding to support such activities (Chell, 2007). Using a multivariate analysis approach and data from the National Survey of Charities and Social Enterprises (NSCSE), it is found that trading activities are used relatively commonly in deprived areas. These organisations are also more likely to attempt to access public sector funds. This suggests policy-makers need to consider the impact of funding cuts on TSOs in the most deprived areas as TSOs are unlikely achieve their objectives without continuing support
"Dynamical" interactions and gauge invariance
Appreciating the classical understanding of the elementary particle the
"dynamical" Poincare algebra is developed. It is shown that the "dynamical"
Poincare algebra and the equations of motion of particles with arbitrary spin
are gauge invariant and that gauge invariance and relativistic invariance stand
on equal footings. A "dynamical" non-minimal interaction is constructed
explicitly and the Rarita-Schwinger equation is considered in the framework of
this "dynamical" interaction.Comment: 24 pages in LaTeX, no figures, published version. arXiv admin note:
substantial text overlap with arXiv:1006.203
Modelling carbonaceous aerosol from residential solid fuel burning with different assumptions for emissions
Evidence is accumulating that emissions of primary particulate matter (PM) from residential wood and coal combustion in the UK may be underestimated and/or spatially misclassified. In this study, different assumptions for the spatial distribution and total emission of PM from solid fuel (wood and coal) burning in the UK were tested using an atmospheric chemical transport model. Modelled concentrations of the PM components were compared with measurements from aerosol mass spectrometers at four sites in central and Greater London (ClearfLo campaign, 2012), as well as with measurements from the UK black carbon network.
The two main alternative emission scenarios modelled were Base4x and combRedist. For Base4x, officially reported PM2.5 from the residential and other non-industrial combustion source sector were increased by a factor of four. For the combRedist experiment, half of the baseline emissions from this same source were redistributed by residential population density to simulate the effect of allocating some emissions to the smoke control areas (that are assumed in the national inventory to have no emissions from this source). The Base4x scenario yielded better daily and hourly correlations with measurements than the combRedist scenario for year-long comparisons of the solid fuel organic aerosol (SFOA) component at the two London sites. However, the latter scenario better captured mean measured concentrations across all four sites. A third experiment, Redist – all emissions redistributed linearly to population density, is also presented as an indicator of the maximum concentrations an assumption like this could yield.
The modelled elemental carbon (EC) concentrations derived from the combRedist experiments also compared well with seasonal average concentrations of black carbon observed across the network of UK sites. Together, the two model scenario simulations of SFOA and EC suggest both that residential solid fuel emissions may be higher than inventory estimates and that the spatial distribution of residential solid fuel burning emissions, particularly in smoke control areas, needs re-evaluation. The model results also suggest the assumed temporal profiles for residential emissions may require review to place greater emphasis on evening (including “discretionary”) solid fuel burning
bacterial infection disrupts the circadian fluctuation of immune cells in wrinkle-lipped bats (Chaerephon plicatus)
Background Leukocyte concentrations follow a circadian pattern in mammals,
with elevated values at times of potential contact with pathogens and
parasites. We hypothesized that this pattern is disturbed after an immune
challenge. Methods In Thailand, we captured wrinkle-lipped bats (Chaerephon
plicatus), when they returned to their colony at dawn. We challenged half of
the animals (experimental group) with bacterial lipopolysaccharides and
treated the others only with the carrier liquid (control group). We then
compared body mass changes and differences in circulating immune cell counts
at 8 h post-treatment. Results In experimental animals, we observed an
increase in total leukocyte and neutrophil numbers of 17% and 95%,
respectively. In control animals, concentrations of leukocytes decreased by
44% and those of neutrophils remained constant. Experimental treatment had no
effect on lymphocytes, yet changes in eosinophil numbers were explained by
sex. Eosinophils decreased by 66% in females and by 62% in males. Basophils
and monocytes were rarest among all observed cell types and analysis was
either impossible because of low numbers or yielded no significant effects,
respectively. Discussion Our findings show that a simulated bacterial
infection triggered a neutrophil-associated immune response in wrinkle-lipped
bats, indicating a disruption of the diurnal fluctuation of immune cells. Our
study suggests that bats exhibit circadian rhythms in immune cell counts. The
magnitude of these fluctuations may vary across species according to specific-
specific infection risks associated with colony sizes or specific roosting
habits
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