294 research outputs found
Effects of Implementing a Health Team Communication Redesign on Hospital Readmissions Within 30 Days
Background and Rationale
Poor communication between health team members can interfere with timely, coordinated preparation for hospital discharge. Research on daily bedside interprofessional health team rounds and nursing bedside shift handoff reports provides evidence that these strategies can improve communication. Aims
To improve health team communication and collaboration about hospital discharge; improve patient experience of discharge measured by patient‐reported quality of discharge teaching, readiness for discharge, and postdischarge coping difficulty; and reduce readmissions and emergency department (ED) visits postdischarge. Methods
A two‐sample pre‐ and postintervention design provided baseline data for redesign of health team communication processes and comparison data for evaluation of the new process’ impact. Health team members (n = 105 [pre], n = 95 [post]) from two surgical units of an academic medical center in the midwestern United States provided data on discharge‐related communication and collaboration. Patients (n = 413 [pre], n = 191 [post]) provided data on their discharge experience (quality of discharge teaching, readiness for discharge, postdischarge coping difficulty) and outcomes (readmissions, ED visits). Chi‐square and t tests were used for unadjusted pre‐ and postintervention comparisons. Logistic regression of readmissions with a matched pre‐ and postintervention sample included adjustments for patient characteristics and hospitalization factors. Results
Readmissions decreased from 18% to 12% (p \u3c .001); ED visits decreased from 4.4% to 1.5% (p \u3c .001). Changes in health team communication and collaboration and patients’ experience of discharge were minimal. Discussion
The targeted outcomes of readmission and ED visits improved after the health team communication process redesign. The process indicators did not improve; potential explanations include unmeasured hospital and unit discharge, and other care process changes during the study timeframe. Linking Evidence to Practice
Evidence from daily interprofessional team bedside rounding and bedside shift report studies was translated into a redesign of health team communication for discharge. These strategies support readmission reduction efforts
Interprofessional Health Team Communication About Hospital Discharge: An Implementation Science Evaluation Study
The Consolidated Framework for Implementation Research guided formative evaluation of the implementation of a redesigned interprofessional team rounding process. The purpose of the redesigned process was to improve health team communication about hospital discharge. Themes emerging from interviews of patients, nurses, and providers revealed the inherent value and positive characteristics of the new process, but also workflow, team hierarchy, and process challenges to successful implementation. The evaluation identified actionable recommendations for modifying the implementation process
Statistical mechanics of the multi-constraint continuous knapsack problem
We apply the replica analysis established by Gardner to the multi-constraint
continuous knapsack problem,which is one of the linear programming problems and
a most fundamental problem in the field of operations research (OR). For a
large problem size, we analyse the space of solution and its volume, and
estimate the optimal number of items to go into the knapsack as a function of
the number of constraints. We study the stability of the replica symmetric (RS)
solution and find that the RS calculation cannot estimate the optimal number of
items in knapsack correctly if many constraints are required.In order to obtain
a consistent solution in the RS region,we try the zero entropy approximation
for this continuous solution space and get a stable solution within the RS
ansatz.On the other hand, in replica symmetry breaking (RSB) region, the one
step RSB solution is found by Parisi's scheme. It turns out that this problem
is closely related to the problem of optimal storage capacity and of
generalization by maximum stability rule of a spherical perceptron.Comment: Latex 13 pages using IOP style file, 5 figure
Storage of correlated patterns in a perceptron
We calculate the storage capacity of a perceptron for correlated gaussian
patterns. We find that the storage capacity can be less than 2 if
similar patterns are mapped onto different outputs and vice versa. As long as
the patterns are in general position we obtain, in contrast to previous works,
that in agreement with Cover's theorem. Numerical simulations
confirm the results.Comment: 9 pages LaTeX ioplppt style, figures included using eps
Secure exchange of information by synchronization of neural networks
A connection between the theory of neural networks and cryptography is
presented. A new phenomenon, namely synchronization of neural networks is
leading to a new method of exchange of secret messages. Numerical simulations
show that two artificial networks being trained by Hebbian learning rule on
their mutual outputs develop an antiparallel state of their synaptic weights.
The synchronized weights are used to construct an ephemeral key exchange
protocol for a secure transmission of secret data. It is shown that an opponent
who knows the protocol and all details of any transmission of the data has no
chance to decrypt the secret message, since tracking the weights is a hard
problem compared to synchronization. The complexity of the generation of the
secure channel is linear with the size of the network.Comment: 11 pages, 5 figure
Learning from Minimum Entropy Queries in a Large Committee Machine
In supervised learning, the redundancy contained in random examples can be
avoided by learning from queries. Using statistical mechanics, we study
learning from minimum entropy queries in a large tree-committee machine. The
generalization error decreases exponentially with the number of training
examples, providing a significant improvement over the algebraic decay for
random examples. The connection between entropy and generalization error in
multi-layer networks is discussed, and a computationally cheap algorithm for
constructing queries is suggested and analysed.Comment: 4 pages, REVTeX, multicol, epsf, two postscript figures. To appear in
Physical Review E (Rapid Communications
Inferring hidden states in Langevin dynamics on large networks: Average case performance
We present average performance results for dynamical inference problems in
large networks, where a set of nodes is hidden while the time trajectories of
the others are observed. Examples of this scenario can occur in signal
transduction and gene regulation networks. We focus on the linear stochastic
dynamics of continuous variables interacting via random Gaussian couplings of
generic symmetry. We analyze the inference error, given by the variance of the
posterior distribution over hidden paths, in the thermodynamic limit and as a
function of the system parameters and the ratio {\alpha} between the number of
hidden and observed nodes. By applying Kalman filter recursions we find that
the posterior dynamics is governed by an "effective" drift that incorporates
the effect of the observations. We present two approaches for characterizing
the posterior variance that allow us to tackle, respectively, equilibrium and
nonequilibrium dynamics. The first appeals to Random Matrix Theory and reveals
average spectral properties of the inference error and typical posterior
relaxation times, the second is based on dynamical functionals and yields the
inference error as the solution of an algebraic equation.Comment: 20 pages, 5 figure
Statistical Mechanics of Learning: A Variational Approach for Real Data
Using a variational technique, we generalize the statistical physics approach
of learning from random examples to make it applicable to real data. We
demonstrate the validity and relevance of our method by computing approximate
estimators for generalization errors that are based on training data alone.Comment: 4 pages, 2 figure
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