1,721,115 research outputs found
Applicabilità delle Tecniche di Ingegneria Naturalistica in Ambito Fluviale: Torrente Levata
No full textQuaderni della Provincia di Potenza, Ambiente e Territori
A MODEL DEVOTED TO STUDY THE ECOLOGICAL RESTORATION OF FLUVIAL HABITATS: A CASE STUDY, FIRST RESULTS
No full textA sediment-filter ecosystem for reservoir rehabilitation
No full textIn the recent years, in response to the increased need of water resources for different uses, the construction of artificial lakes has created many problems, causing an irreversible modification in the natural environment: the possibility of flooding over nearest areas is increased, new local climatic conditions are created and there is a loss in water and sediments that should be given back to the river downstream.
Moreover, the mean lifetime of artificial lakes is greatly shortened by the amount of sediments from the rivers feeding into them. Thus, maintenance of these particular habitats by means of periodically sediment removing in order to keep a satisfactory level of functionality is necessary.
To answer to this necessity and meanwhile to improve the environment quality, in this paper we propose a system, based on the integration of both classical and ecological engineering techniques, ables to: 1) refurnish satisfactory reservoir volumes by removing sediments from the bottom; 2) provide the possibility of reusing these sediments; and 3) increase local biodiversity.
The case study is located in Southern Italy, in the Basilicata Region, and involves the Camastra Reservoir
Potentials and multi-criteria assessment of small scale CHP plants fired by energy crops in Puglia region (Italy)
No full textInfluence of process parameters and biomass characteristics on the durability of pellets from the pruning residues of Olea europaea L
No full textThe present work aims to investigate the influence of the main process parameters (pressure and temperature) and biomass characteristics (moisture content and particle size) on some mechanical properties (density and durability) of olive tree pruning residues pellets. By means of a lab scale pellet press, able to control process parameters, the biomass, ground with three different hammer mill screen sizes (1, 2 and 4 mm) and conditioned at different moisture contents (5, 10, 15 and 20% w.b.), was pelletized at various process temperatures (60, 90, 120 and 150. °C) and pressures (71, 106, 141 and 176. MPa). Compressed sample dimensions and mass were measured in order to calculate pellet density, while compressive strength tests were carried out to estimate the durability of the final biofuel. The relationships between the factor settings and the responses (density, compression strength and modulus of elasticity) were examined by univariate and multivariate statistical analysis.Temperature resulted the most important variable influencing pellet mechanical properties, followed by the initial moisture content and the particle size of the raw material. In particular, high process temperature, low moisture contents and reduced particle sizes allowed obtaining good quality pellets. The effect of compression force resulted scarcely relevant. © 2010 Elsevier Ltd
From tale to reality: Geographical differences in children's flood‐risk perception
No full textFew studies have approached children's behaviour during flood disasters, and none of them were in Italy. In this study we performed an analysis of flood‐risk perception in children aged between six and 14 years in three Italian regions characterised by diverse typologies of flood phenomena. To perform such an analysis, we collected data using a fictional story which, through identification with the protagonist, allowed for reliable and spontaneous answers from the young respondents. The studied communities were the pilot areas of the European research project LIFE PRIMES, “Preventing flooding RIsks by Making resilient communitiES.” The findings highlighted various expressed behaviours, with some differences between areas. The most unsafe expressed behaviour was “running outside.” Such a reaction becomes proportionally less important from younger to older respondents. The safest expressed behaviour was “reaching a high place,” which appears later in children and becomes more important from younger to older respondents. Not all communities demonstrated a good correlation between those two behaviours and age groups. The analysis suggests the need to implement educational and training activities specifically focused on children's needs during flood emergencies and that take into account the different geographical conditions in which children live
Raccontare l’imprevedibile: i sindaci italiani su Facebook durante la pandemia da COVID-19
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Attualità diagnostiche ed interpretative del morbo di Wegener: osservazione di un caso clinico
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