2,371 research outputs found
PCN36 Cost Analysis Model Between The Cobas Braf Test And Sanger Sequencing When Treating Malignant Melanoma Based On The Presence Of V600 Mutations
L'informe de gestió de l'exercici 201
A Novel Massage Therapy Technique for Management of Chronic Cervical Pain: A Case Series
Background: Neck pain is a generalized condition resulting from a complex etiology with presentation of a wide variety of symptoms. Neck pain is most often accompanied by decreased range of motion (ROM), muscle and joint stiffness, and limitations in functional capabilities. This condition may result in significant personal and societal burden.
Purpose: We evaluated the effectiveness of a novel massage therapy intervention by following the treatment regimen and outcomes of two patients experiencing chronic neck pain.
Participants: Two patients (46 and 53 years old) experienced chronic (>5 years) neck pain. Both patients reported pain, limited ROM, and muscle and joint stiffness. Additionally, the first patient reported a lack of sleep, and both patients stated their pain interfered with their quality of life and activities of daily living.
Intervention: Patients received the Integrative Muscular Movement Technique (IMMT) intervention approximately twice a week for a total of eight treatments, each approximately 20 minutes in duration.
Results: Both patients experienced a reduction in pain and an increase in cervical ROM in flexion, extension, rotation, and sidebending. The first patient also reported an increased ability to sleep. Both patients reported an increased ability to perform activities of daily living, including work-related responsibilities.
Conclusions: For the two patients included in this report, therapist observations and patient reports indicate that inclusion of the IMMT treatment in a treatment regimen for chronic neck pain may lead to decreased pain and increased cervical ROM. These positive effects of the IMMT intervention may have a role in enhancing functional outcomes of these patients
Entanglement and the Power of One Qubit
The "Power of One Qubit" refers to a computational model that has access to
only one pure bit of quantum information, along with n qubits in the totally
mixed state. This model, though not as powerful as a pure-state quantum
computer, is capable of performing some computational tasks exponentially
faster than any known classical algorithm. One such task is to estimate with
fixed accuracy the normalized trace of a unitary operator that can be
implemented efficiently in a quantum circuit. We show that circuits of this
type generally lead to entangled states, and we investigate the amount of
entanglement possible in such circuits, as measured by the multiplicative
negativity. We show that the multiplicative negativity is bounded by a
constant, independent of n, for all bipartite divisions of the n+1 qubits, and
so becomes, when n is large, a vanishingly small fraction of the maximum
possible multiplicative negativity for roughly equal divisions. This suggests
that the global nature of entanglement is a more important resource for quantum
computation than the magnitude of the entanglement.Comment: 22 pages, 4 figure
Constrained bounds on measures of entanglement
Entanglement measures constructed from two positive, but not completely
positive maps on density operators are used as constraints in placing bounds on
the entanglement of formation, the tangle, and the concurrence of 4 x N mixed
states. The maps are the partial transpose map and the -map introduced by
Breuer [H.-P. Breuer, Phys. Rev. Lett. 97, 080501 (2006)]. The norm-based
entanglement measures constructed from these two maps, called negativity and
-negativity, respectively, lead to two sets of bounds on the entanglement
of formation, the tangle, and the concurrence. We compare these bounds and
identify the sets of 4 x N density operators for which the bounds from one
constraint are better than the bounds from the other. In the process, we
present a new derivation of the already known bound on the concurrence based on
the negativity. We compute new bounds on the three measures of entanglement
using both the constraints simultaneously. We demonstrate how such doubly
constrained bounds can be constructed. We discuss extensions of our results to
bipartite states of higher dimensions and with more than two constraints.Comment: 28 pages, 12 figures. v2 simplified and generalized derivation of
main results; errors correcte
Quantum probabilities as Bayesian probabilities
In the Bayesian approach to probability theory, probability quantifies a
degree of belief for a single trial, without any a priori connection to
limiting frequencies. In this paper we show that, despite being prescribed by a
fundamental law, probabilities for individual quantum systems can be understood
within the Bayesian approach. We argue that the distinction between classical
and quantum probabilities lies not in their definition, but in the nature of
the information they encode. In the classical world, maximal information about
a physical system is complete in the sense of providing definite answers for
all possible questions that can be asked of the system. In the quantum world,
maximal information is not complete and cannot be completed. Using this
distinction, we show that any Bayesian probability assignment in quantum
mechanics must have the form of the quantum probability rule, that maximal
information about a quantum system leads to a unique quantum-state assignment,
and that quantum theory provides a stronger connection between probability and
measured frequency than can be justified classically. Finally we give a
Bayesian formulation of quantum-state tomography.Comment: 6 pages, Latex, final versio
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On the implications of aerosol liquid water and phase separation for modeled organic aerosol mass
Water is an important component of PM2.5 Many traditional SOA species are highly soluble and thus can be considered extractable Water can influence the partitioning of compounds traditionally considered insoluble in models Organic aerosol takes up water according to RH Organic aerosol interacts with inorganic water Deviations in ideality (solubility) must be considered
Predictors of 30-Day Hospital Readmission among Maintenance Hemodialysis Patients: A Hospitals Perspective
Over 35% of patients on maintenance dialysis are readmitted to the hospital within 30 days of hospital discharge. Outpatient dialysis facilities often assume responsibility for readmission prevention. Hospital care and discharge practices may increase readmission risk. We undertook this study to elucidate risk factors identifiable from hospital-derived data for 30-day readmission among patients on hemodialysis
On quantum coding for ensembles of mixed states
We consider the problem of optimal asymptotically faithful compression for
ensembles of mixed quantum states. Although the optimal rate is unknown, we
prove upper and lower bounds and describe a series of illustrative examples of
compression of mixed states. We also discuss a classical analogue of the
problem.Comment: 23 pages, LaTe
Hypersensitivity to Perturbations in the Quantum Baker's Map
We analyze a randomly perturbed quantum version of the baker's
transformation, a prototype of an area-conserving chaotic map. By numerically
simulating the perturbed evolution, we estimate the information needed to
follow a perturbed Hilbert-space vector in time. We find that the Landauer
erasure cost associated with this information grows very rapidly and becomes
much larger than the maximum statistical entropy given by the logarithm of the
dimension of Hilbert space. The quantum baker's map thus displays a
hypersensitivity to perturbations that is analogous to behavior found earlier
in the classical case. This hypersensitivity characterizes ``quantum chaos'' in
a way that is directly relevant to statistical physics.Comment: 8 pages, LATEX, 3 Postscript figures appended as uuencoded fil
Local Realistic Model for the Dynamics of Bulk-Ensemble NMR Information Processing
We construct a local realistic hidden-variable model that describes the
states and dynamics of bulk-ensemble NMR information processing up to about 12
nuclear spins. The existence of such a model rules out violation of any Bell
inequality, temporal or otherwise, in present high-temperature, liquid-state
NMR experiments. The model does not provide an efficient description in that
the number of hidden variables grows exponentially with the number of nuclear
spins.Comment: REVTEX, 7 page
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