5,418 research outputs found
Stable Determination of the Electromagnetic Coefficients by Boundary Measurements
The goal of this paper is to prove a stable determination of the coefficients
for the time-harmonic Maxwell equations, in a Lipschitz domain, by boundary
measurements
Eficacia clínica y tolerancia a corto plazo del empleo de perindoprilo, torasemida, propentofilina y dieta de restricción de sodio en perros con insuficiencia valvular mitral secundaria a endocardiosis mitral
Tropical Dominating Sets in Vertex-Coloured Graphs
Given a vertex-coloured graph, a dominating set is said to be tropical if
every colour of the graph appears at least once in the set. Here, we study
minimum tropical dominating sets from structural and algorithmic points of
view. First, we prove that the tropical dominating set problem is NP-complete
even when restricted to a simple path. Then, we establish upper bounds related
to various parameters of the graph such as minimum degree and number of edges.
We also give upper bounds for random graphs. Last, we give approximability and
inapproximability results for general and restricted classes of graphs, and
establish a FPT algorithm for interval graphs.Comment: 19 pages, 4 figure
Surveillance of nosocomial infections: a preliminary study on yeast carriage on hands of healthcare workers
Hospital-acquired fungal infection is increasing. The aim of this preliminary study was to evaluate the frequency and distribution of yeast carriage on the hands of healthcare workers (HCW) from different departments. The study was conducted in three departments (Surgery, Intensive Care Unit, Obstetrics and Gynaecology) of a hospital in Campania, southern Italy. Over a six-month period, 50 healthcare workers were randomly tested. Imprints of palms and fingertips were taken monthly during the morning shift. The plate with yeast was counted and Candida species were identified. Risk factors for hand contamination were determined. Hand carriage of yeast and Candida species in the three departments were found in the following percentages: Surgery (50% and 49%); Intensive Care Unit (61% and 57%); Obstetrics and Gynaecology (65% and 59%). No significant difference in the frequency or distribution of yeast and Candida sp. recovered in the three departments was ascertained by comparing every two months? data, the hand carriage of yeast and Candida species found in the three departments; this varied ? min to max ? according to the following percentages: Surgery [(45%-54%) and (42%-58%)]; Intensive Care Unit [(53%-66%) and (56%-59%)]; Obstetrics and Gynaecology [(62%-69%) and (57%-63%)]. The only factor associated with yeast carriage on the hands of healthcare workers was the absence of gloving during healthcare procedure (p = 0.0192). We conclude that in our study yeast carriage on the HCWs? hands is common in the three departments investigated, but its causes are unclear. Careful use of gloving may reduce pathogenic yeast on hands
Surveillance of nosocomial infections: a preliminary study on hand hygiene compliance of healthcare workers
The observance of hand hygiene compliance is important to reduce cross-infection by micro-organisms. The aim of this preliminary study was to evaluate the level of hand hygiene in healthcare workers from different departments, with particular emphasis on transient flora. The study was conducted in three departments (Surgery, Intensive Care Unit, Obstetrics and
Gynecology) of a hospital in Campania, southern Italy. Over a six-month period, 50 healthcareworkers wererandomly tested.
Imprints of palms and fingertips were taken monthly during the morning shift. The number of colonies per plate was counted and transient pathogens were identified. Risk factors for hand contamination were determined. Total flora was found in the following CFU means per palm and per five fingertips (95% CI):
Obstetrics and Gynecology [palms 130 CFUs (95% CI 85-180); fingertips 125 CFUs (95% CI 92-160)]; ICU [palms 80 CFUs (95% CI 58-99); fingertips 62 CFUs (95% CI 45-82)]; Surgery [palms 75 CFUs (95% CI 41-120); fingertips 70 CFUs (95% CI 52-90)] Transient flora was found on 39% of healthcare workers?hands. The only factor associated with hand contamination by transient flora was the absence of gloving during healthcare procedure(P=0.02)
First experimental test of Bell inequalities performed using a non-maximally entangled state
We report on the realisation of a new test of Bell inequalities using the
superposition of type I parametric down conversion produced in two different
non-linear crystals pumped by the same laser, but with different polarisation.
The produced state is non-maximally entangled. We discuss the advantages and
the possible developments of this configuration
Numerical studies towards practical large-eddy simulation
Large-eddy simulation developments and validations are presented for an
improved simulation of turbulent internal flows. Numerical methods are proposed
according to two competing criteria: numerical qualities (precision and
spectral characteristics), and adaptability to complex configurations. First,
methods are tested on academic test-cases, in order to abridge with fundamental
studies. Consistent results are obtained using adaptable finite volume method,
with higher order advection fluxes, implicit grid filtering and "low-cost"
shear-improved Smagorinsky model. This analysis particularly focuses on mean
flow, fluctuations, two-point correlations and spectra. Moreover, it is shown
that exponential averaging is a promising tool for LES implementation in
complex geometry with deterministic unsteadiness. Finally, adaptability of the
method is demonstrated by application to a configuration representative of
blade-tip clearance flow in a turbomachine
Perinatal Tuberculosis: Is it a Forgotten Disease?
Perinatal tuberculosis is an uncommon condition but with a high mortality and a challenging diagnosis. We present four cases of perinatal tuberculosis managed between 1991-2014 in a Spanish Tertiary Hospital. The infection should be considered in patients with progressive respiratory symptoms and with a poor response to conventional antibiotic therapy, especially in those with positive epidemiologic risk. Bronchoscopy can be a useful tool for diagnosis
Recommended from our members
THERMODYNAMICS OF FE-CU ALLOYS AS DESCRIBED BY A CLASSIC POTENTIALS
The Fe-Cu system is of relevance to the nuclear industry because of the deleterious consequences of Cu precipitates in the mechanical properties of Fe. Several sets of classical potentials are used in molecular dynamics simulations studies of this system, in particular that proposed by Ludwig et al. (Modelling Simul. Mater. Sci. Eng. 6, 19 (1998)). In this work we extract thermodynamic information from this interatomic potentials. We obtain equilibrium phase diagram and find a reasonable agreement with the experimental phases in the regions of relevance to radiation damage studies. We compare the results with the predicted phase diagram based on other potential, as calculated in previous work. We discuss the disagreements found between the phase diagram calculated here and experimental results, focusing on the pure components and discuss the applicability of these potentials; finally we suggest an approach to improve existing potentials for this system
- …