10,080 research outputs found
A Simple Algebraic Derivation of the Covariant Anomaly and Schwinger Term
An expression for the curvature of the "covariant" determinant line bundle is
given in even dimensional space-time. The usefulness is guaranteed by its
prediction of the covariant anomaly and Schwinger term. It allows a parallel
derivation of the consistent anomaly and Schwinger term, and their covariant
counterparts, which clarifies the similarities and differences between them. In
particular, it becomes clear that in contrary to the case for anomalies, the
difference between the consistent and covariant Schwinger term can not be
extended to a local form on the space of gauge potentials.Comment: 16 page
Implementing the information prescription protocol in a family medicine practice: a case study.
QUESTION:
Can an information prescription protocol be successfully integrated into a family medicine practice seeking to enhance patient education and self-management? SETTING:
Milton Family Practice, an outpatient clinic and resident teaching site of the University of Vermont and Fletcher Allen Health Care, is located in a semirural area fifteen miles from main campus. OBJECTIVES:
The objectives were to increase physicians\u27 knowledge and use of information prescriptions, sustain integration of information prescription use, and increase physicians\u27 ability to provide patient education information. METHODS:
Methods used were promotion of the National Library of Medicine\u27s Information Rx, physician instruction, installation of patient and provider workstations, and a collaborative approach to practice integration. MAIN RESULTS:
A post-intervention survey showed increased physician knowledge and use of the Information Rx protocol. Support procedures were integrated at the practice. CONCLUSIONS:
Sustainable integration of Information Rx in a primary care clinic requires not only promotion and education, but also attention to clinic organization and procedures
NS Fivebrane and Tachyon Condensation
We argue that a semi-infinite D6-brane ending on an NS5-brane can be obtained
from the condensation of the tachyon on the unstable D9-brane of type IIA
theory. The construction uses a combination of the descriptions of these branes
as solitons of the worldvolume theory of the D9-brane. The NS5-brane, in
particular, involves a gauge bundle which is operator valued, and hence is
better thought of as a gerbe.Comment: 20 pages, harvma
Malignancy within a tail gut cyst:a case of retrorectal carcinoid tumour
Purpose. Tailgut cysts with malignant transformation are rare entities. We discuss the diagnostic strategy and treatment of a malignancy within a tailgut cyst. Methods. In this study we report on the case of a 61-year-old man with a malignant neuroendocrine tumour arising within a tailgut cyst and an overview of the literature emphasising the histopathological characteristics and differential diagnosis. Results. Our patient presented with lower back pain, rectal pain, and increased urgency of defecation. MRI scan and CT-guided biopsy on histological analysis revealed a diagnosis of carcinoid tumour of the presacral space. The patient subsequently underwent an abdominoperineal excision of the rectum. Conclusions. This case highlights the importance of tailgut cysts as a differential diagnosis of presacral masses. It is a rare congenital lesion developing from remnants of the embryonic postanal gut and is predominantly benign in nature. Approximately half of cases remain asymptomatic; therefore, diagnosis is often delayed. Magnetic resonance imaging is the investigation of choice and an awareness of the possibility of malignant potential is critical to avoiding missed diagnosis and subsequent morbidity. Complete surgical excision allows accurate diagnosis, confirmation of oncological clearance, and prevention of mortality
Current-driven microwave oscillations in current perpendicular-to-plane spin-valve nanopillars
We study the current and temperature dependences of the microwave voltage
emission of spin-valve nanopillars subjected to an in-plane magnetic field and
a perpendicular-to-plane current. Despite the complex multilayer geometry,
clear microwave emission is shown to be possible and spectral lines as narrow
as 3.8 MHz (at 150 K) are observed.Comment: To appear in Applied Physics Letter
Ecological factors controlling biodiversity in the British countryside (ECOFACT). Module 6 - The causes of change in biodiversity. Interim report
Thermal correlators of anyons in two dimensions
The anyon fields have trivial -commutator for not integer.
For integer the commutators become temperature-dependent operator
valued distributions. The -point functions do not factorize as for quasifree
states.Comment: 14 pages, LaTeX (misprints corrected, a reference added
Fast simulation of a quantum phase transition in an ion-trap realisable unitary map
We demonstrate a method of exploring the quantum critical point of the Ising
universality class using unitary maps that have recently been demonstrated in
ion trap quantum gates. We reverse the idea with which Feynman conceived
quantum computing, and ask whether a realisable simulation corresponds to a
physical system. We proceed to show that a specific simulation (a unitary map)
is physically equivalent to a Hamiltonian that belongs to the same universality
class as the transverse Ising Hamiltonian. We present experimental signatures,
and numerical simulation for these in the six-qubit case.Comment: 12 pages, 6 figure
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