Search results for " sample"
showing 10 items of 456 documents
Giustizia ambientale e recupero delle aree verdi: il caso di Palermo
2021
L’urban shrinkage è diventata una questione centrale tanto nel dibattito scientifico quanto nell’agenda politica di diverse città europee. Secondo i dati EUROSTAT (2019), circa il 40% delle città europee con più di 200.000 abitanti stanno perdendo popolazione; una contrazione che si esplicita maggiormente, sotto il profilo spaziale, in una progressiva sottoutilizzazione del patrimonio edificato, così come nel contestuale incremento di aree e terreni in stato di abbandono. In questo quadro controverso di mutazione strutturale della città, così come l’abbiamo conosciuta, le politiche urbane alla prova in Europa tentano di declinare la decrescita quale occasione strategica di investimento sull…
Reaccionan Completamente los Precios ante un Anuncio de Adquisiciin? Evidencia en el Mercado de Control de Empresas Espaaol (Do Prices Fully React to…
2013
This note examines whether prices fully reflect value creation or destruction at the time of the acquisition announcement when samples are split into listed and unlisted target firms as previous international results are ambiguous about this subject. We find that the Spanish market fully react to the acquisition announcement (showing value creation only for unlisted target firms acquisitions), except for the smallest bidders of public targets since we find significant positive abnormal returns for a 24-month post-acquisition window when event portfolio returns are computed equally-weighted but insignificant abnormal returns when value-weighted returns are computed. This evidence is consiste…
Serological Evidence for Multiple Strains of Canine Norovirus in the UK Dog Population
2013
International audience; Noroviruses are associated with intestinal disease in humans, cows, pigs, mice, and, more recently, dogs. In 2007, the first canine norovirus (CNV) was identified and characterized in Italy. Subsequent studies have identified CNV in stools of dogs from Portugal, Greece, and the United States. To investigate the prevalence of CNV in the UK dog population, 228 canine stool samples were screened for CNV by qPCR, and 396 serum samples were screened for anti-CNV antibodies. qPCR of RNA extracted from canine stool samples did not reveal any CNV-positive samples, based on samples collected from diarrhoeic and control dogs in 2012-2013. CNV virus-like particles to three diff…
Is Green Harvesting a Useful Instrument to solve Market Problems in the Wine Sector? Some Lessons from Sicily
2016
The green harvesting (GH) policy measure has been introduced in Italy starting from the 2009/2010 wine season, with the goal of preventing market crises by reducing the yield of a given parcel to zero. In the 2010-2012 period, almost 85% of the national expenditure and about 81% of European Union (EU) expenditure for this measure have been showered on Sicily. This paper, after examining the application of GH in this Region, explores the motivations of 300 vine growers of Western Sicily for taking part, or refusing to do so, in the GH measure. The survey shows the contrasting nature of the opinions that the implementation of GH has caused among the interviewed sample. In fact, on the one han…
Can Applications Designed to Evaluate Visual Function Be Used in Different iPads?
2018
SIGNIFICANCE: Apple devices could be suitable for vision tests, provided that the test has been correctly adapted to the device, after considering the spatial and colorimetric characterization of the screen. PURPOSE: The majority of vision applications has not been developed by vision or colorimetry experts and suffers from conceptual and design errors that may lead average users to an erroneous assessment of their visual capabilities. The reliability of vision tests depends on the accurate generation of the necessary visual stimuli in a particular device. Our aim was to ascertain whether a given color test, designed for a colorimetrically characterized device, might be used in another simi…
Intraoperative alteration of the total clearance of ascorbic acid in plasma
2003
Ascorbic acid (AA) is an important antioxidant in the plasma and has the tendency to postoperatively reduced values. This could be caused by an increased antioxidative activity of AA as a radical scavenger since operations are a well-known scenario of oxidative stress with increased radical production. There is some evidence for an intraoperative onset of oxidative stress which could be related to an increased antioxidative activity of AA. Therefore, the total clearance (Cltot) of AA was calculated pre- and intraoperatively in 20 neurosurgical patients. At both times plasma samples were taken before, and 15, 30, 60 and 120 minutes after an iv. AA-bolus of 4 mg/kg AA/body weight. Cltot of AA…
Absorption characteristics, major elements and chl a content of samples from Pond 19 at Zackenberg, NE Greenland
2012
1. Shallow arctic lakes and ponds have simple and short food webs, but large uncertainties remain about benthic-pelagic links in these systems. We tested whether organic matter of benthic origin supports zooplankton biomass in a pond in NE Greenland, using stable isotope analysis of carbon and nitrogen in the pond itself and in a 13C-enrichment enclosure experiment. In the latter, we manipulated the carbon isotope signature of benthic algae to enhance its isotopic discrimination from other potential food sources for zooplankton. 2. The cladoceran Daphnia middendorffiana responded to the 13C-enrichment of benthic mats with progressively increasing d13C values, suggesting benthic feeding. Sta…
The Performance of the Gradient-Like Influence Measure in Generalized Linear Mixed Models
2015
A gradient-like statistic, recently introduced as an influence measure, has been proven to work well in large sample, thanks to its asymptotic properties. In this work, through small-scale simulation schemes, the performance of such a diagnostic measure is further investigated in terms of concordance with the main influence measures used for outlier identification. The simulation studies are performed by using generalized linear mixed models (GLMMs).
Work-family conflict and enrichment and perceived health: Does type of family matter?
2011
The present study examined work-family conflict and enrichment and perceived health (stress symptoms, life satisfaction) according to the following family types: 1 = two-parent families with 1–2 children, 2 = two-parent families with 3 or more children, 3 = single-parent families with 1 or more children, 4 = childless co-habiting/married couples. We also studied whether work-family conflict and enrichment show direct and interaction (buffering) effects on perceived health, and whether these effects vary by family type. Empirically, the study was based on a heterogeneous sample of Finnish employees (N = 5097). The results showed that parents reported more family-to-work conflict, family-to-w…
Une approche géométrique du contrôle optimal de l'arc atmosphérique de la navette spatiale
2002
L'objectif de ce travail est de faire quelques remarques géométriques et des calculs préliminaires pour construire l'arc atmosphérique optimal d'une navette spatiale (problème de rentrée sur Terre ou programme d'exploration de Mars). Le système décrivant les trajectoires est de dimension 6, le contrôle est l'angle de gîte cinématique et le coût est l'intégrale du flux thermique. Par ailleurs il y a des contraintes sur l'état (flux thermique, accélération normale et pression dynamique). Notre étude est essentiellement géométrique et fondée sur une évaluation de l'ensemble des états accessibles en tenant compte des contraintes sur l'état. On esquisse une analyse des extrémales du Principe du …