1,230 research outputs found
Towards "green" smart materials for force and strain sensors: The case of polyaniline
Stress/strain sensors constitute a class of devices with a global ever-growing market
thanks to their use in many fields of modern life. They are typically constituted by thin metal foils
deposited on flexible supports. However, the low inherent resistivity and limited flexibility of their
constituents make them inadequate for several applications, such as measuring large movements in
robotic systems and biological tissues. As an alternative to the traditional compounds, in the present
work we will show the advantages to employ a smart material, polyaniline (PANI), prepared by an
innovative environmentally friendly route, for force/strain sensor applications wherein simple
processing, environmental friendliness and sensitivity are particularly required.This work was supported by FEDER through the COMPETE Program and by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Project PESTC/FIS/UI607/2011 and the project Matepro âOptimizing Materials and Processesâ, ref. NORTE-070124-FEDER-000037â, co-funded by the âPrograma Operacional Regional do Norteâ (ON.2 â O Novo Norte), under the âQuadro de ReferĂȘncia EstratĂ©gico Nacionalâ (QREN), through the âFundo Europeu de Desenvolvimento Regionalâ (FEDER). The authors also thank FCT for financial support under project PTDC/CTM-NAN/112574/2009. The authors also thank the COST Actions MP1003 (European Scientific Network for Artificial Muscles, ESNAM) and MP0902 (Composites of Inorganic Nanotubes and Polymers, COINAPO)
Broadband distortion modeling in Lyman- forest BAO fitting
In recent years, the Lyman- absorption observed in the spectra of
high-redshift quasars has been used as a tracer of large-scale structure by
means of the three-dimensional Lyman- forest auto-correlation function
at redshift , but the need to fit the quasar continuum in every
absorption spectrum introduces a broadband distortion that is difficult to
correct and causes a systematic error for measuring any broadband properties.
We describe a -space model for this broadband distortion based on a
multiplicative correction to the power spectrum of the transmitted flux
fraction that suppresses power on scales corresponding to the typical length of
a Lyman- forest spectrum. Implementing the distortion model in fits for
the baryon acoustic oscillation (BAO) peak position in the Lyman-
forest auto-correlation, we find that the fitting method recovers the input
values of the linear bias parameter and the redshift-space distortion
parameter for mock data sets with a systematic error of less than
0.5\%. Applied to the auto-correlation measured for BOSS Data Release 11, our
method improves on the previous treatment of broadband distortions in BAO
fitting by providing a better fit to the data using fewer parameters and
reducing the statistical errors on and the combination
by more than a factor of seven. The measured values at
redshift are $\beta_{F}=1.39^{+0.11\ +0.24\ +0.38}_{-0.10\ -0.19\
-0.28}b_{F}(1+\beta_{F})=-0.374^{+0.007\ +0.013\ +0.020}_{-0.007\
-0.014\ -0.022}\sigma\sigma\sigma$ statistical errors). Our
fitting software and the input files needed to reproduce our main results are
publicly available.Comment: 28 pages, 15 figures, matches the published versio
Barriers and facilitators to the implementation of nurseâs role in primary care settings: an integrative review
Background: The rapid evolution of the epidemiological picture and the recent SARS-COV-2 pandemic has expressed the vulnerabilities of health systems and focuses attention on the populationâs needs. The nurseâs figure in the care teams is universally identified; however, the implementation of the role within some care settings turns out to be complex and challenging. This integrative review aims to identify the barriers and facilitators in implementing the role of the nurse in primary care settings. Methods: An integrative review was conducted on the Medline and Cinahl databases until 9 June 2020. Qualitative, quantitative, and Mixed-method research studies were selected to identify studies related to the barriers and facilitators of the nurseâs role in nursing facilitiesâ primary care. For the extraction of the results, the Consolidating Framework for Research Implementation (CFIR) was used to identify the factors that influence implementation in health care. Results: Following the duplicatesâ removal, the search identified 18,257 articles, of which 56 were relevant to the inclusion criteria; therefore, they were included in the summary. The selected studies were conducted in thirteen countries, most from Oceania, Europe, North America, Latin America, and the Caribbean. The barriers reported most frequently concern the nursing professionâs regulatory and regulatory aspects within the contexts of care, cultural and organizational aspects, training, and the transfer of specific skills, which were previously designated to doctors. The facilitators are mainly linked to the nurseâs adaptability to the various contexts of care, recognizing the patientâs role, and the desire to develop multidisciplinary and effective working groups to respond to the health needs of the population in primary care contexts. Conclusion: This review highlighted the main barriers and facilitators in implementing the nurseâs role in primary care settings. These results offer useful elements for stakeholders to identify effective strategies in preparing programs and activities for implementing the nurseâs role, acting on the elements identified as barriers and favouring the aspects that emerge as facilitators
When Viruses Meet Fungi: Tackling the Enemies in Hematology
The association of invasive fungal infections (IFI) and viral infections has been described in patients with hematologic malignancies (HM), in particular in hematopoietic stem cell transplant recipients. Regrettably, the diagnosis is often challenging, making the treatment inappropriate in some circumstances. The present review takes into consideration the viral infections commonly associated with IFI. Clinical presentation of IFI and viral infections, risk factors, and impact on the outcome of HM patients are discussed throughout the paper
A new critical curve for the Lane-Emden system
We study stable positive radially symmetric solutions for the Lane-Emden
system in , in , where .
We obtain a new critical curve that optimally describes the existence of such
solutions.Comment: 13 pages, 1 figur
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