7,721 research outputs found
Leveraging RFID in hospitals: patient life cycle and mobility perspectives
The application of Radio Frequency Identification (RFID) to patient care in hospitals and healthcare facilities has only just begun to be accepted. This article develops a set of frameworks based on patient life cycle and time-and-motion perspectives for how RFID can be leveraged atop existing information systems to offer many benefits for patient care and hospital operations.
It examines how patients are processed from admission to discharge, and considers where RFID can be applied. From a time-and-motion perspective, it shows how hospitals can apply RFID in three ways: fixed RFID readers interrogate mobile objects; mobile, handheld readers interrogate fixed objects; and mobile, handheld readers interrogate mobile objects.
Implemented properly, RFID can significantly aid the medical staff in performing their duties. It can greatly reduce the need for manual entry of records, increase security for both patient and hospital, and reduce errors in administering medication. Hospitals are likely to encounter challenges, however, when integrating the technology into their day-to-day operations. What we present here can help hospital administrators determine where RFID can be deployed to add the most value
Recent Trends in Software Testing Education: A Systematic Literature Review
Testing is a critical aspect of software development. Far too often software is released with critical faults. However, testing is often considered tedious and boring. Unfortunately, many graduates might join the work force without having had any education in software testing, which exacerbates the problem even further. Therefore, teaching software testing as part of a university degree in software engineering and is very important. But it is an open challenge how to teach software testing in an effective way that can successfully motivate students. In this paper, we have carried out a systematic literature review on the topic of teaching software testing. We analysed and reviewed 30 papers that were published between 2013 and 2017. The review points out to a few different trends, like the use of gamification to make the teaching of software testing less tedious
Accurate molecular polarizabilities with coupled-cluster theory and machine learning
The molecular polarizability describes the tendency of a molecule to deform
or polarize in response to an applied electric field. As such, this quantity
governs key intra- and inter-molecular interactions such as induction and
dispersion, plays a key role in determining the spectroscopic signatures of
molecules, and is an essential ingredient in polarizable force fields and other
empirical models for collective interactions. Compared to other ground-state
properties, an accurate and reliable prediction of the molecular polarizability
is considerably more difficult as this response quantity is quite sensitive to
the description of the underlying molecular electronic structure. In this work,
we present state-of-the-art quantum mechanical calculations of the static
dipole polarizability tensors of 7,211 small organic molecules computed using
linear-response coupled-cluster singles and doubles theory (LR-CCSD). Using a
symmetry-adapted machine-learning based approach, we demonstrate that it is
possible to predict the molecular polarizability with LR-CCSD accuracy at a
negligible computational cost. The employed model is quite robust and
transferable, yielding molecular polarizabilities for a diverse set of 52
larger molecules (which includes challenging conjugated systems, carbohydrates,
small drugs, amino acids, nucleobases, and hydrocarbon isomers) at an accuracy
that exceeds that of hybrid density functional theory (DFT). The atom-centered
decomposition implicit in our machine-learning approach offers some insight
into the shortcomings of DFT in the prediction of this fundamental quantity of
interest
The Arches Cluster: Extended Structure and Tidal Radius
At a projected distance of ~26 pc from Sgr A*, the Arches cluster provides
insight to star formation in the extreme Galactic Center (GC) environment.
Despite its importance, many key properties such as the cluster's internal
structure and orbital history are not well known. We present an astrometric and
photometric study of the outer region of the Arches cluster (R > 6.25") using
HST WFC3IR. Using proper motions we calculate membership probabilities for
stars down to F153M = 20 mag (~2.5 M_sun) over a 120" x 120" field of view, an
area 144 times larger than previous astrometric studies of the cluster. We
construct the radial profile of the Arches to a radius of 75" (~3 pc at 8 kpc),
which can be well described by a single power law. From this profile we place a
3-sigma lower limit of 2.8 pc on the observed tidal radius, which is larger
than the predicted tidal radius (1 - 2.5 pc). Evidence of mass segregation is
observed throughout the cluster and no tidal tail structures are apparent along
the orbital path. The absence of breaks in the profile suggests that the Arches
has not likely experienced its closest approach to the GC between ~0.2 - 1 Myr
ago. If accurate, this constraint indicates that the cluster is on a prograde
orbit and is located front of the sky plane that intersects Sgr A*. However,
further simulations of clusters in the GC potential are required to interpret
the observed profile with more confidence.Comment: 24 pages (17-page main text, 7-page appendix), 24 figures, accepted
to Ap
Data-driven Abstractions for Verification of Deterministic Systems
A common technique to verify complex logic specifications for dynamical
systems is the construction of symbolic abstractions: simpler, finite-state
models whose behaviour mimics the one of the systems of interest. Typically,
abstractions are constructed exploiting an accurate knowledge of the underlying
model: in real-life applications, this may be a costly assumption. By sampling
random -step trajectories of an unknown system, we build an abstraction
based on the notion of -completeness. We newly define the notion of
probabilistic behavioural inclusion, and provide probably approximately correct
(PAC) guarantees that this abstraction includes all behaviours of the concrete
system, for finite and infinite time horizon, leveraging the scenario theory
for non convex problems. Our method is then tested on several numerical
benchmarks
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