15,312 research outputs found
Adolescents' and parents' views of Child and Adolescent Mental Health Services (CAMHS) in Ireland
Aim: To explore adolescents’ and parents’ experiences of CAMHS in relation to accessibility, approachability, and appropriateness. Methods: Using a descriptive qualitative design, a combination of focus group and single interviews were conducted with adolescents (n=15) and parents (n=32) from three mental health clinics. Data were transcribed verbatim and analysed using thematic analysis. Results: Accessing mental health services was a challenging experience due to knowledge deficit, lack of information and limited availability of specialist services. Participants desired more information, involvement in decision-making, single and shared consultations, flexible scheduling of appointments, continuity with clinicians, school support and parent support groups. Participants seem to be generally satisfied, however adolescents felt less involved in decision making than they would have liked. Frequent staff changes was problematic as it disrupted continuity of care and hindered the formation of a trusting relationship. Implications for practice: Parents and adolescents expressed similar views of the positive and negative aspects of mental health services. Their need for more information-sharing and involvement in decision-making underline the importance of collaborative practice. Clinician continuity contributed to trusting therapeutic relationships and was valued. These are key principles that with attention, could lead to quality service provision for adolescents and families
Managing interoperability and complexity in health systems
In recent years, we have witnessed substantial progress in the use of clinical informatics systems to support clinicians during episodes of care, manage specialised domain knowledge, perform complex clinical data analysis and improve the management of health organisations’ resources. However, the vision of fully integrated health information eco-systems, which provide relevant information and useful knowledge at the point-of-care, remains elusive. This journal Focus Theme reviews some of the enduring challenges of interoperability and complexity in clinical informatics systems. Furthermore, a range of approaches are proposed in order to address, harness and resolve some of the many remaining issues towards a greater integration of health information systems and extraction of useful or new knowledge from heterogeneous electronic data repositories
Thermodynamic Geometric Stability of Quarkonia states
We compute exact thermodynamic geometric properties of the non-abelian
quarkonium bound states from the consideration of one-loop strong coupling.
From the general statistical principle, the intrinsic geometric nature of
strongly coupled QCD is analyzed for the Columbic, rising and Regge rotating
regimes. Without any approximation, we have obtained the non-linear mass effect
for the Bloch-Nordsieck rotating strongly coupled quarkonia. For a range of
physical parameters, we show in each cases that there exists a well-defined,
non-degenerate, curved, intrinsic Riemannian manifold. As the gluons become
softer and softer, we find in the limit of the Bloch-Nordsieck resummation that
the strong coupling obtained from the Sudhakov form factor possesses exact
local and global thermodynamic properties of the underlying mesons, kaons and
particles.Comment: 45 pages, 17 figures, Keywords: Thermodynamic Geometry, Quarkonia,
Massive Quarks, QCD Form Factor. PACS: 02.40.-k; 14.40.Pq; 12.40.Nn; 14.70.D
On the UV renormalizability of noncommutative field theories
UV/IR mixing is one of the most important features of noncommutative field
theories. As a consequence of this coupling of the UV and IR sectors, the
configuration of fields at the zero momentum limit in these theories is a very
singular configuration. We show that the renormalization conditions set at a
particular momentum configuration with a fixed number of zero momenta,
renormalizes the Green's functions for any general momenta only when this
configuration has same set of zero momenta. Therefore only when renormalization
conditions are set at a point where all the external momenta are nonzero, the
quantum theory is renormalizable for all values of nonzero momentum. This
arises as a result of different scaling behaviors of Green's functions with
respect to the UV cutoff () for configurations containing different
set of zero momenta. We study this in the noncommutative theory and
analyse similar results for the Gross-Neveu model at one loop level. We next
show this general feature using Wilsonian RG of Polchinski in the globally O(N)
symmetric scalar theory and prove the renormalizability of the theory to all
orders with an infrared cutoff. In the context of spontaneous symmetry breaking
(SSB) in noncommutative scalar theory, it is essential to note the different
scaling behaviors of Green's functions with respect to for different
set of zero momenta configurations. We show that in the broken phase of the
theory the Ward identities are satisfied to all orders only when one keeps an
infrared regulator by shifting to a nonconstant vacuum.Comment: 29 pages, 8 figures, uses JHEP.cls, references adde
Phase Structure of lattice SU(2)xU_S(1) three-dimensional Gauge Theory
We discuss a phase diagram for a relativistic SU(2) x U_{S}(1) lattice gauge
theory, with emphasis on the formation of a parity-invariant chiral condensate,
in the case when the field is infinitely coupled, and the SU(2)
field is moved away from infinite coupling by means of a strong-coupling
expansion. We provide analytical arguments on the existence of (and partially
derive) a critical line in coupling space, separating the phase of broken SU(2)
symmetry from that where the symmetry is unbroken. We review uncoventional
(Kosterlitz-Thouless type) superconducting properties of the model, upon
coupling it to external electromagnetic potentials. We discuss the r\^ole of
instantons of the unbroken subgroup U(1) of SU(2), in eventually destroying
superconductivity under certain circumstances. The model may have applications
to the theory of high-temperature superconductivity. In particular, we argue
that in the regime of the couplings leading to the broken SU(2) phase, the
model may provide an explanation on the appearance of a pseudo-gap phase, lying
between the antiferromagnetic and the superconducting phases. In such a phase,
a fermion mass gap appears in the theory, but there is no phase coherence, due
to the Kosterlitz-Thouless mode of symmetry breaking. The absence of
superconductivity in this phase is attributed to non-perturbative effects
(instantons) of the subgroup U(1) of SU(2).Comment: 51 pages latex, 10 figures incorporate
Black Strings, Black Rings and State-space Manifold
State-space geometry is considered, for diverse three and four parameter
non-spherical horizon rotating black brane configurations, in string theory and
-theory. We have explicitly examined the case of unit Kaluza-Klein momentum
black strings, circular strings, small black rings and black
supertubes. An investigation of the state-space pair correlation functions
shows that there exist two classes of brane statistical configurations, {\it
viz.}, the first category divulges a degenerate intrinsic equilibrium basis,
while the second yields a non-degenerate, curved, intrinsic Riemannian
geometry. Specifically, the solutions with finitely many branes expose that the
two charged rotating black strings and three charged rotating small
black rings consort real degenerate state-space manifolds. Interestingly,
arbitrary valued -dipole charged rotating circular strings and Maldacena
Strominger Witten black rings exhibit non-degenerate, positively curved,
comprehensively regular state-space configurations. Furthermore, the
state-space geometry of single bubbled rings admits a well-defined, positive
definite, everywhere regular and curved intrinsic Riemannian manifold; except
for the two finite values of conserved electric charge. We also discuss the
implication and potential significance of this work for the physics of black
holes in string theory.Comment: 41 pages, Keywords: Rotating Black Branes; Microscopic
Configurations; State-space Geometry, PACS numbers: 04.70.-s Physics of black
holes; 04.70.Bw Classical black holes; 04.70.Dy Quantum aspects of black
holes, evaporation, thermodynamic
Verifiable Model of Neutrino Masses from Large Extra Dimensions
We propose a new scenario of neutrino masses with a Higgs triplet
in a theory of large extra dimensions. Lepton number
violation in a distant brane acts as the source of a very small trilinear
coupling of to the standard Higgs doublet in our brane. Small realistic
Majorana neutrino masses are \underline{naturally} obtained with the
fundamental scale TeV, foretelling the possible
discovery of (m_\xi\lsim M_*) at future colliders. Decays of
into same-sign dileptons are fixed by the neutrino mass matrix. Observation of
conversion in nuclei is predicted.Comment: A comment on Tevatron reach and two references added. Discussion and
conclusions unchange
Center or Limit Cycle: Renormalization Group as a Probe
Based on our studies done on two-dimensional autonomous systems, forced
non-autonomous systems and time-delayed systems, we propose a unified
methodology - that uses renormalization group theory - for finding out
existence of periodic solutions in a plethora of nonlinear dynamical systems
appearing across disciplines. The technique will be shown to have a non-trivial
ability of classifying the solutions into limit cycles and periodic orbits
surrounding a center. Moreover, the methodology has a definite advantage over
linear stability analysis in analyzing centers
Uncertainties on parton distribution functions from the ZEUS NLO QCD fit to data on deep inelastic scattering
An NLO QCD analysis of the ZEUS data on deep inelastic scattering
together with fixed-target data has been performed from which the gluon and
quark densities of the proton and the value of the strong coupling parameter,
, have been extracted. The study includes a full treatment of
the experimental systematic uncertainties, including point-to-point
correlations. Different ways of incorporating correlated systematic
uncertainties into the fit are discussed and compared.Comment: 8 pages, 1 figure. Invited talk at the Conference on Advanced
Statistical Techniques in Particle Physics, March 18-22 2002, Durham, U
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