802 research outputs found
The Strength of Non-Perturbative Effects in Matrix Models and String Effective Lagrangians
We present a summary of the results of an explicit calculation of the
strength of non-perturbative interactions in matrix models and string effective
Lagrangians. These interactions are induced by single eigenvalue instantons in
the bosonic matrix model. A well defined approximation scheme is used to
obtain induced operators whose exact form we exhibit. We briefly discuss the
possibility that similar instantons in a supersymmetric version of the theory
may break supersymmetry dynamically.Comment: Latex document, 17 pages, preprint CERN-TH.7356/94, UPR-620
Supersymmetric Field Theory from Supermatrix Models
We show that the continuum limit of one-dimensional N=2 supersymmetric matrix
models can be described by a two-dimensional interacting field theory of a
massless boson and two chiral fermions. We interpret this field theory as a
two-dimensional N=1 supersymmetric theory of two chiral superfields, in which
one of the chiral superfields has a non-trivial vacuum expectation value.Comment: Latex document, 11 pages, preprint CERN-TH.7353/94, UPR-621
A BPS Interpretation of Shape Invariance
We show that shape invariance appears when a quantum mechanical model is
invariant under a centrally extended superalgebra endowed with an additional
symmetry generator, which we dub the shift operator. The familiar mathematical
and physical results of shape invariance then arise from the BPS structure
associated with this shift operator. The shift operator also ensures that there
is a one-to-one correspondence between the energy levels of such a model and
the energies of the BPS-saturating states. These findings thus provide a more
comprehensive algebraic setting for understanding shape invariance.Comment: 15 pages, 2 figures, LaTe
Educational needs of medical practitioners about medical billing: a scoping review of the literature
Introduction: The World Health Organization has suggested the solution to health system waste caused by incorrect billing and fraud is policing and prosecution. However, a growing body of evidence suggests leakage may not always be fraudulent or corrupt, with researchers suggesting medical practitioners may sometimes struggle to understand increasingly complex legal requirements around health financing and billing transactions, which may be improved through education. To explore this phenomenon further, we undertook a scoping review of the literature to identify the medical billing education needs of medical practitioners and whether those needs are being met.
Methods: Eligible records included English language materials published between 1 January 2000 and 4 May 2020. Searches were conducted on MEDLINE, PubMed, Google Scholar, CINAHL, LexisNexis and Heinonline.
Results: We identified 74 records as directly relevant to the search criteria. Despite undertaking a comprehensive, English language search, with no country restrictions, studies meeting the inclusion criteria were limited to three countries (Australia, Canada, US), indicating a need for further work internationally. The literature suggests the education needs of medical practitioners in relation to medical billing compliance are not being met and medical practitioners desire more education on this topic. Evidence suggests education may be effective in improving medical billing compliance and reducing waste in health systems. There is broad agreement amongst medical education stakeholders in multiple jurisdictions that medical billing should be viewed as a core competency of medical education, though there is an apparent inertia to include this competency in medical education curricula. Penalties for non-compliant medical billing are serious and medical practitioners are at risk of random audits and investigations for breaches of sometimes incomprehensible, and highly interpretive regulations they may never have been taught.
Conclusion: Despite acknowledged significance of waste in health systems due to poor practitioner knowledge of billing practices, there has been very little research to date on education interventions to improve health system efficiency at a practitioner level
Medicare billing, law and practice: Complex, incomprehensible and beginning to unravel
© 2019 Thomson Head Office. All rights reserved. Australia's Medicare is still widely considered one of the world's best health systems. However, continual political tinkering for 40 years has led to a medical billing and payment system that has become labyrinthine in its complexity and is more vulnerable to abuse now, from all stakeholders, than when first introduced. Continuing to make alterations to Medicare without addressing underlying structural issues, may compound Australia's health reform challenges, increase the incidence of non-compliance and expenditure and thwart necessary reforms to develop a modern, data-driven, digitally informed health system. For the medical practitioners who are required to navigate the increasing complexity and relentless change, they will remain at high risk of investigation and prosecution in what has become an anarchic operating environment that they cannot avoid, but do not understand
Effective Symmetries of the Minimal Supermultiplet of N = 8 Extended Worldline Supersymmetry
A minimal representation of the N = 8 extended worldline supersymmetry, known
as the `ultra-multiplet', is closely related to a family of supermultiplets
with the same, E(8) chromotopology. We catalogue their effective symmetries and
find a Spin(4) x Z(2) subgroup common to them all, which explains the
particular basis used in the original construction. We specify a constrained
superfield representation of the supermultiplets in the ultra-multiplet family,
and show that such a superfield representation in fact exists for all adinkraic
supermultiplets. We also exhibit the correspondences between these
supermultiplets, their Adinkras and the E(8) root lattice bases. Finally, we
construct quadratic Lagrangians that provide the standard kinetic terms and
afford a mixing of an even number of such supermultiplets controlled by a
coupling to an external 2-form of fluxes.Comment: 13 Figure
Twisted Sectors and Chern-Simons Terms in M-Theory Orbifolds
It is shown that the twisted sector spectrum, as well as the associated
Chern-Simons interactions, can be determined on M-theory orbifold fixed planes
that do not admit gravitational anomalies. This is demonstrated for the
seven-planes arising within the context of an explicit orbifold, although the results are completely general. Local
anomaly cancellation in this context is shown to require fractional anomaly
data that can only arise from a twisted sector on the seven-planes, thus
determining the twisted spectrum up to a small ambiguity. These results open
the door to the construction of arbitrary M-theory orbifolds, including those
containing fixed four-planes which are of phenomenological interest.Comment: 21 pages, LaTe
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