14,280 research outputs found
Diagnostic radiography students' perceptions towards communication with service users who are deaf or hearing impaired.
Communication issues can arise when deaf or hearing impaired individuals access National Health Service (NHS) radiology services if reasonable adjustments and inclusive services are not facilitated. This study aims to assess student diagnostic radiographers' attitudes and communication experience with service users who are deaf or hearing impaired. An anonymous online survey was conducted on UK undergraduate diagnostic radiography students from a single university. The sample size of students invited to participate in the study was n = 156. The measurement scales and questions included quantitative attitudinal 5-point Likert and qualitative free-response questions. Statistical analysis included the Kruskal-Wallis H test, Mann-Whitney U test, pairwise comparisons of variables and thematic coding of qualitative data. n=48 students responded. The student's perceptions of communication experiences with deaf or hearing-impaired patients were positive (72.9%) but depended on the amount of experience whilst on clinical placement (first-year students had less clinical placement experience than years two and three). Overall confidence in communicating was 47.9% with no difference by gender (p = 0.87) but variance by age category (p = 0.03), with the 18-29 group less confident and first-year students having less experience to draw upon for responses (p = 0.04). Confidence in gaining consent (56.3%) demonstrated no variation by gender (p = 0.75) or cohort (p = 0.54), but variance by age category (p = 0.03) due to difference in unmatched sample sizes. Participants elaborated on positive service adaptations that can be facilitated for service users who are deaf or hearing impaired and issues that caused negative communication experiences. The study has produced data on the experience of student radiographers interacting with an understudied service user group who are deaf or hearing impaired. Qualitative responses discussed a range of resources to assist clinical practice communication and recommendations for further improvements and training opportunities. The findings of this study can help to inform future research, policy, practice, and educational training. [Abstract copyright: Copyright © 2022 The Author(s). Published by Elsevier Ltd.. All rights reserved.
Closed trajectories of a particle model on null curves in anti-de Sitter 3-space
We study the existence of closed trajectories of a particle model on null
curves in anti-de Sitter 3-space defined by a functional which is linear in the
curvature of the particle path. Explicit expressions for the trajectories are
found and the existence of infinitely many closed trajectories is proved.Comment: 12 pages, 1 figur
Binary Decision Diagrams: from Tree Compaction to Sampling
Any Boolean function corresponds with a complete full binary decision tree.
This tree can in turn be represented in a maximally compact form as a direct
acyclic graph where common subtrees are factored and shared, keeping only one
copy of each unique subtree. This yields the celebrated and widely used
structure called reduced ordered binary decision diagram (ROBDD). We propose to
revisit the classical compaction process to give a new way of enumerating
ROBDDs of a given size without considering fully expanded trees and the
compaction step. Our method also provides an unranking procedure for the set of
ROBDDs. As a by-product we get a random uniform and exhaustive sampler for
ROBDDs for a given number of variables and size
Tropomyosin Flexural Rigidity and Single Ca2+ Regulatory Unit Dynamics: Implications for Cooperative Regulation of Cardiac Muscle Contraction and Cardiomyocyte Hypertrophy
Striated muscle contraction is regulated by dynamic and cooperative interactions among Ca2+, troponin, and tropomyosin on the thin filament. While Ca2+ regulation has been extensively studied, little is known about the dynamics of individual regulatory units and structural changes of individual tropomyosin molecules in relation to their mechanical properties, and how these factors are altered by cardiomyopathy mutations in the Ca2+ regulatory proteins. In this hypothesis paper, we explore how various experimental and analytical approaches could broaden our understanding of the cooperative regulation of cardiac contraction in health and disease
Dynamics of hard-sphere suspension using Dynamic Light Scattering and X-Ray Photon Correlation Spectroscopy: dynamics and scaling of the Intermediate Scattering Function
Intermediate Scattering Functions (ISF's) are measured for colloidal hard
sphere systems using both Dynamic Light Scattering (DLS) and X-ray Photon
Correlation Spectroscopy (XPCS). We compare the techniques, and discuss the
advantages and disadvantages of each. Both techniques agree in the overlapping
range of scattering vectors. We investigate the scaling behaviour found by
Segre and Pusey [1] but challenged by Lurio et al. [2]. We observe a scaling
behaviour over several decades in time but not in the long time regime.
Moreover, we do not observe long time diffusive regimes at scattering vectors
away from the peak of the structure factor and so question the existence of a
long time diffusion coefficients at these scattering vectors.Comment: 21 pages, 11 figure
Modified Debye-Huckel Electron Shielding and Penetration Factor
Screened potential, modified by non standard electron cloud distributions
responsible for the shielding effect on fusion of reacting nuclei in
astrophysical plasmas, is derived. The case of clouds with depleted tails in
space coordinates is discussed. The modified screened potential is obtained
both from statistical mechanics arguments based on fluctuations of the inverse
of the Debye-Huckel radius and from the solution of a Bernoulli equation used
in generalized statistical mechanics. Plots and tables useful in evaluating
penetration probability at any energy are provided.Comment: 9 pages, 3 figures, 3 table
Numerical Linked-Cluster Algorithms. I. Spin systems on square, triangular, and kagome lattices
We discuss recently introduced numerical linked-cluster (NLC) algorithms that
allow one to obtain temperature-dependent properties of quantum lattice models,
in the thermodynamic limit, from exact diagonalization of finite clusters. We
present studies of thermodynamic observables for spin models on square,
triangular, and kagome lattices. Results for several choices of clusters and
extrapolations methods, that accelerate the convergence of NLC, are presented.
We also include a comparison of NLC results with those obtained from exact
analytical expressions (where available), high-temperature expansions (HTE),
exact diagonalization (ED) of finite periodic systems, and quantum Monte Carlo
simulations.For many models and properties NLC results are substantially more
accurate than HTE and ED.Comment: 14 pages, 16 figures, as publishe
Conservation laws for multidimensional systems and related linear algebra problems
We consider multidimensional systems of PDEs of generalized evolution form
with t-derivatives of arbitrary order on the left-hand side and with the
right-hand side dependent on lower order t-derivatives and arbitrary space
derivatives. For such systems we find an explicit necessary condition for
existence of higher conservation laws in terms of the system's symbol. For
systems that violate this condition we give an effective upper bound on the
order of conservation laws. Using this result, we completely describe
conservation laws for viscous transonic equations, for the Brusselator model,
and the Belousov-Zhabotinskii system. To achieve this, we solve over an
arbitrary field the matrix equations SA=A^tS and SA=-A^tS for a quadratic
matrix A and its transpose A^t, which may be of independent interest.Comment: 12 pages; proof of Theorem 1 clarified; misprints correcte
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