659,862 research outputs found
Where do we draw lines: professional relationship boundaries and the child and youth care practitioner
The question of professional relationship boundaries is a poignant one, in light of the many boundary grey-zones that are created by the variety of young people’s needs, practice settings and professional relationship contexts within the field of child and youth care. In order to support practitioners’ development of critical thought and awareness of professional boundaries, this paper applies a professional relationship boundaries conceptual framework to child and youth care work, and the literature is consulted to explore the impacts of boundary violations, influences on individual’s boundaries, cues to indicate blurring boundaries, and key strategies to maintain balanced boundaries
'But you can't compare Malawi and Ireland!' - shifting boundaries in a globalised world
Although global influences - in the form of international finance coupled with discourses of partnership, participation, good governance, and democracy - exercise an increasing influence on national and local governance arrangements worldwide, comparative studies across the traditional South/North divide remain extremely rare. Drawing on findings from a comparative study of Malawi's PRSP and Ireland's national Social Partnership process, this article demonstrates that a shifting of conceptual boundaries beyond traditionally delineated geographic borders is not just valid but essential, in that it helps to reveal new perspectives on the politics underlying globalised development processes and the transformative potential of those processes
Influences of spin accumulation on the intrinsic spin Hall effect in two dimensional electron gases with Rashba spin-orbit coupling
In a two dimensional electron gas with Rashba spin-orbit coupling, the
external electric field may cause a spin Hall current in the direction
perpendicular to the electric field. This effect was called the intrinsic spin
Hall effect. In this paper, we investigate the influences of spin accumulation
on this intrinsic spin Hall effect. We show that due to the existence of
boundaries in a real sample, the spin Hall current generated by the intrinsic
spin Hall effect will cause spin accumulation near the edges of the sample, and
in the presence of spin accumulation, the spin Hall conductivity will not have
a universal value. The influences of spin accumulation on the intrinsic spin
Hall effect in narrow strips of two dimensional electron gases with Rashba
spin-orbit coupling are investigated in detail.Comment: 7 pages, 2 figure
Boundary drive induced formation of aggregate condensates in stochastic transport with short-range interactions
We discuss the effects of particle exchange through open boundaries and the
induced drive on the phase structure and condensation phenomena of a stochastic
transport process with tunable short-range interactions featuring
pair-factorized steady states (PFSS) in the closed system. In this model, the
steady state of the particle hopping process can be tuned to yield properties
from the zero-range process (ZRP) condensation model to those of models with
spa- tially extended condensates. By varying the particle exchange rates as
well as the presence of a global drift, we observe a phase transition from a
free particle gas to a phase with condensates aggregated to the boundaries.
While this transition is similar to previous results for the ZRP, we find that
the mechanism is different as the presence of the boundary actually influences
the interaction due to the non-zero interaction range.Comment: 6 pages, 7 figure
Effects of Space Charge, Dopants, and Strain Fields on Surfaces and Grain Boundaries in YBCO Compounds
Statistical thermodynamical and kinetically-limited models are applied to
study the origin and evolution of space charges and band-bending effects at low
angle [001] tilt grain boundaries in YBaCuO and the effects of Ca
doping upon them. Atomistic simulations, using shell models of interatomic
forces, are used to calculate the energetics of various relevant point defects.
The intrinsic space charge profiles at ideal surfaces are calculated for two
limits of oxygen contents, i.e. YBaCuO and YBaCuO. At
one limit, O, the system is an insulator, while at O, a metal. This is
analogous to the intrinsic and doping cases of semiconductors. The site
selections for doping calcium and creating holes are also investigated by
calculating the heat of solution. In a continuum treatment, the volume of
formation of doping calcium at Y-sites is computed. It is then applied to study
the segregation of calcium ions to grain boundaries in the Y-123 compound. The
influences of the segregation of calcium ions on space charge profiles are
finally studied to provide one guide for understanding the improvement of
transport properties by doping calcium at grain boundaries in Y-123 compound.Comment: 13 pages, 5 figure
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