2,164 research outputs found
On the ISW-cluster cross-correlation in future surveys
We investigate the cosmological information contained in the
cross-correlation between the Integrated Sachs-Wolfe (ISW) of the Cosmic
Microwave Background (CMB) anisotropy pattern and galaxy clusters from future
wide surveys. Future surveys will provide cluster catalogues with a number of
objects comparable with galaxy catalogues currently used for the detection of
the ISW signal by cross-correlation with the CMB anisotropy pattern. By
computing the angular power spectra of clusters and the corresponding
cross-correlation with CMB, we perform a signal-to-noise ratio (SNR) analysis
for the ISW detection as expected from the eROSITA and the Euclid space
missions. We discuss the dependence of the SNR of the ISW-cluster
cross-correlation on the specifications of the catalogues and on the reference
cosmology. We forecast that the SNRs for ISW-cluster cross-correlation are
alightly smaller compared to those which can be obtained from future galaxy
surveys but the signal is expected to be detected at high significance, i.e.
more than . We also forecast the joint constraints on parameters
of model extensions of the concordance CDM cosmology by combining CMB
and the ISW-cluster cross-correlation.Comment: 12 pages, 10 figures. Matches version accepted in MNRA
Stability of Cubic FAPbI from X-ray Diffraction, Anelastic, and Dielectric Measurements
Among the hybrid metal-organic perovskites for photovoltaic applications
FAPbI_3 (FAPI) has the best performance regarding efficiency and the worst
regarding stability, even though the reports on its stability are highly
contradictory. In particular, since at room temperature the cubic alpha phase,
black and with high photovoltaic efficiency, is metastable against the yellow
hexagonal delta phase, it is believed that alpha-FAPI spontaneously transform
into delta-FAPI within a relatively short time. We performed X-ray diffraction
and thermogravimetric measurements on loose powder of FAPI, and present the
first complete dielectric and anelastic spectra of compacted FAPI samples under
various conditions. We found that alpha-FAPI is perfectly stable for at least
100 days, the duration of the experiments, unless extrinsic factors induce its
degradation. In our tests, degradation was detected after exposure to humidity,
strongly accelerated by grain boundaries and the presence of delta phase, but
it was not noticeable on the loose powder kept in air under normal laboratory
illumination. These findings have strong implications on the strategies for
improving the stability of FAPI without diminishing its photovoltaic efficiency
through modifications of its composition
Open University vs. Consorzio Nettuno: An Institutional Analysis of Two Technology Enabled Higher Educational Systems
Assuming a rational perspective, the adoption and development of a new organisational technology can be viewed as a way to achieve an higher level of efficiency by finding the best way to fully exploit its potential. In other words, one might sustain that since organisations do initially ignore how to best deal with an innovative technology, they engage in a trial and error learning process that finally leads to the x-efficiency frontier. Once this knowledge is achieved, it will probably be spread around by external agents (e.g. consultants) enabling an imitative process. Thus in the long run all organisations will make almost the same efficient use of a mature organisational technology. In this paper we tried to explore how the same technology (eLearning) has been adopted by two diverse educational organisations. The patterns of development have been studied across time to verify if a progressive convergence has occurred. Results are providing some useful insights on what variables must be paid attention to when transferring a technological organisational innovation in a different settin
Titanium and Ruthenium Phthalocyanines for NO2 Sensors: A Mini-Review
This review presents studies devoted to the description and comprehension of phenomena connected with the sensing behaviour towards NO2 of films of two phthalocyanines, titanium bis-phthalocyanine and ruthenium phthalocyanine. Spectroscopic, conductometric, and morphological features recorded during exposure to the gas are explained and the mechanisms of gas-molecule interaction are also elucidated. The review also shows how X-ray reflectivity can be a useful tool for monitoring morphological parameters such as thickness and roughness that are demonstrated to be sensitive variables for monitoring the exposure of thin films of sensor materials to NO2 gas
Injectable selfâhealing hydrogel delivering microRNAsâloaded nanocarriers as a promising advanced therapy for cardiac regeneration
Canine giardiosis in Sardinia Island, Italy: prevalence, molecular characterization, and risk factors
Introduction: The flagellate protozoan Giardia duodenalis causes infection in humans and in various animals. Eight distinct assemblages (A-H) have been identified within G. duodenalis; assemblages A and B are those specific to humans and animals, and assemblages C to H are restricted to animal hosts.
Methodology: The present study estimated the prevalence of G. duodenalis assemblages in dogs living in the Sardinia region and evaluated the related risk factors. Individual fecal samples were collected from 655 dogs between January 2007 and December 2010, and a form was filled out for each animal to analyze historic data that were available at the time of sampling. Fecal samples were subjected to microscopic and genetic investigations.
Results: Cysts of G. duodenalis were found in 172 (26.3%) samples, with significant values in puppies between three and nine months of age, and in kennelled and hunting dogs. The molecular characterization showed the presence of assemblages D (49%), C (36.1%), and subtype A2 (4.2%).
Conclusion: The present survey contributes to the knowledge of the occurrence of canine giardiosis in Italy in a region with a high number of dogs and numerous animal movements, which is especially relevant for touristic reasons.</br
MICRORNA-RELEASING LIPOPLEXES FOR DIRECT CARDIAC REPROGRAMMING IN PATHOLOGICAL CARDIAC TISSUE
Lipoplexes for effective in vitro delivery of microRNAs to adult human cardiac fibroblasts for perspective direct cardiac cell reprogramming
Design of nanocarriers for efficient miRNA delivery can significantly improve miRNA-based therapies. Lipoplexes based on helper lipid, dioleoyl phosphatidylethanolamine (DOPE) and cationic lipid [2-(2,3-didodecyloxypropyl)-hydroxyethyl] ammonium bromide (DE) were formulated to efficiently deliver miR-1 or a combination of four microRNAs (miRcombo) to adult human cardiac fibroblasts (AHCFs). Lipoplexes with amino-to-phosphate groups ratio of 3 (N/P 3) showed nanometric hydrodynamic size (372 nm), positive Z-potential (40 mV) and high stability under storage conditions. Compared to commercial Dharma FECT1 (DF), DE-DOPE/miRNA lipoplexes showed superior miRNA loading efficiency (99 % vs. 64 %), and faster miRNA release (99 % vs. 82 % at 48 h). DE-DOPE/miR-1 lipoplexes showed superior viability (80-100 % vs. 50 %) in AHCFs, a 2-fold higher miR-1 expression and Twinfilin-1 (TWF-1) mRNA down regulation. DE-DOPE/ miRcombo lipoplexes significantly enhanced AHCFs reprogramming into induced cardiomyocytes (iCMs), as shown by increased expression of CM markers compared to DF/miRcombo. (C) 2022 The Authors. Published by Elsevier Inc
The Epidemiological <i>scenario</i> of echinococcosis in the Abruzzo region
Echinococcosis is still one of the most common parasitic disease in Italy and has important consequences on economic
retums, productivity and public health. Although it is a notifiable disease, the lack of notifications in the
Abruzzo region is an obstacle to tracing a reliable epidemiological picture of this parasitic disease in humans and livestock. A statistical survey and a molecular study were carried out to update figures and facts (e.g. prevalence in ruminants and dogs and risk factors) and to gather more information (i.e. kind and viability of cysts, strain/genotypes and reliability of coproantigen test) regarding the epidemiological scenario of echinococcosis in intermediate and definitive hosts in Abruzzo region
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