Search results for "SCA"
showing 10 items of 23299 documents
Ocena przestrzennego rozmieszczenia parków narodowych i obszarów chronionego krajobrazu w państwach Europy Środkowej na tle prowincji fizycznogeograf…
2020
Na podstawie analizy przestrzennego rozmieszczenia parków narodowych i obszarów chronionego krajobrazu Polski (parki krajobrazowe), Czech, Słowacji i Węgier oceniono czy tworzone w poszczególnych krajach systemy ochrony przyrody i krajobrazu są reprezentatywne również dla prowincji fizycznogeograficznych w granicach państw. Stwierdzono znaczną reprezentatywność w prowincjach głównie górskich i wskazano na dalsze możliwości ochrony. Na podstawie oceny stopnia integracji systemów ochrony przyrody i krajobrazu w rejonach przygranicznych określono obszary, które powinny uzupełnić system. Między poszczególnymi krajami występują różnice w przestrzennej organizacji parków narodowych i obszarów och…
Measuring the perceived value of rural tourism: a field survey in the western Sicilian agritourism sector
2016
Rural tourism constitutes a valuable tool for the sustainable development of many rural areas. This paper examines the concept of perceived value in rural tourism. A quantitative field survey was carried out in some main Western Sicilian holiday farms (agritourisms) during the Spring 2014. A theoretical model of the tourists’ perceived value in this specific context was developed and validated, using a 22-item scale. Using Partial Least Squares Path Modelling a theoretical structural model of the multidimensional structure of the RTPV was tested, assessing intensity and direction of the causal relationships among RTPV and its dimensions. Five dimensions were identified as forming the constr…
Open-source QCD analysis of nuclear parton distribution functions at NLO and NNLO
2019
We present new sets of nuclear parton distribution functions (nPDFs) at next-to-leading order (NLO) and next-to-next-to-leading order (NNLO). Our analyses are based on deeply inelastic scattering data with charged-lepton and neutrino beams on nuclear targets. In addition, a set of proton baseline PDFs is fitted within the same framework with the same theoretical assumptions. The results of this global QCD analysis are compared to existing nPDF sets and to the fitted cross sections. Also, the uncertainties resulting from the limited constraining power of the included experimental data are presented. The published work is based on an open-source tool, xFitter, which has been modified to be ap…
Melt Processed PCL/PEG Scaffold with Discrete Pore Size Gradient for Selective Cellular Infiltration
2016
In order to develop scaffold able to mimic the natural gradient properties of tissues, biphasic and triphasic approaches were adopted. In this work, polycaprolactone/polyethylene glycol (PCL/PEG) scaffolds were prepared by using a combination of melt mixing and selective leaching without harmful solvents. The method permitted to develop three-layer scaffolds with high control of porosity and pore size. The mechanical properties were evaluated under physiological condition in order to simulate the real conditions of work. Co-culture of osteoblastic and fibroblastic mice cells were carried out in order to study the differential cellular permeation through the different pore size layers.
Three-layered porous device in PCL/PEG blend for interface tissue engineering
2016
Tissue interfaces, such as cartilage-to-bone, exhibit anisotropic structural properties, which gradually vary from one tissue to another. Consequently a regenerative scaffold designed for interface tissues should exhibit a gradient in composition, structure and mechanical features, mimicking those of the native zones. In particular, the architecture of pores plays a central role. Indeed, a biomedical implant should be designed with porosityand pore size gradients simulating the structure of the two interface tissues. One of the most common techniques to prepare porous scaffolds is the particulate leaching method, which involves the selective leaching of a mineral or organic compound as poro…
The Sirocco's chamber of Micciulla manor in Palermo : a bioclimatic archetype symbol of legality and civil redemption
2019
La Camera dello scirocco di fondo Micciulla è uno degli oltre trenta esemplari di un antesignano sistema di raffrescamento passivo ipogeo, diffusosi a Palermo tra il XVII e il XVIII secolo. Grotte artificiali scavate al di sotto o in prossimità delle dimore palermitane presso le quali i ricchi signori si rifugiavano per sfuggire alle elevate temperature estive, rese spesso insopportabili dal caldo vento africano di Scirocco. Tra tutte, la Camera dello Scirocco di fondo Micciulla è forse la più nota non solo per la sua particolare e unica struttura “a cielo aperto”, ma anche e soprattutto per i trascorsi storici ad essa legati. Il presente contributo intende ripercorrere le fasi più signific…
REIMAR. Registro delle identità della pesca mediterranea e dei borghi marinari
2023
Nell’arcaico, tensionale e contraddittorio rapporto tra le comunità e il mare, i saperi tecnici finalizzati allo sfruttamento delle risorse si intrecciano inestricabilmente con specifiche concezioni del mondo e della natura. Così, alla dimensione materiale relativa alla produzione degli strumenti artigianali funzionali alla pesca, si affianca un complesso e vasto orizzonte di rappresentazioni ideologiche e di pratiche simboliche che in Sicilia sono ancora vitali nonostante le profonde trasformazioni socioeconomiche. Il Registro delle Identità della Pesca Mediterranea e dei Borghi Marinari è stato istituito dal Dipartimento della Pesca Mediterranea della Regione Siciliana per salvaguardare e…
Image classification based on 2D feature motifs
2013
The classification of raw data often involves the problem of selecting the appropriate set of features to represent the input data. In general, various features can be extracted from the input dataset, but only some of them are actually relevant for the classification process. Since relevant features are often unknown in real-world problems, many candidate features are usually introduced. This degrades both the speed and the predictive accuracy of the classifier due to the presence of redundancy in the candidate feature set. In this paper, we study the capability of a special class of motifs previously introduced in the literature, i.e. 2D irredundant motifs, when they are exploited as feat…
Modeling the probability distribution of peak discharge for infiltrating hillslopes
2017
Hillslope response plays a fundamental role in the prediction of peak discharge at the basin outlet. The peak discharge for the critical duration of rainfall and its probability distribution are needed for designing urban infrastructure facilities. This study derives the probability distribution, denoted as GABS model, by coupling three models: (1) the Green-Ampt model for computing infiltration, (2) the kinematic wave model for computing discharge hydrograph from the hillslope, and (3) the intensity-duration-frequency (IDF) model for computing design rainfall intensity. The Hortonian mechanism for runoff generation is employed for computing the surface runoff hydrograph. Since the antecede…
Modelling the influence of landscape on pedestrian's route choices using a multinomial logit model
2007
ACTI; International audience