373 research outputs found
Researching geomorphological heritage of the Marecchia River valley
No full textKnowledge about geosites in the Marecchia River valley and Montefeltro historical region (among Emilia-Romagna, Marche, and Toscana regions and the Republic of San Marino, Northern Italy) has been put into the context of a qualitative and quantitative analysis of the geomorphological features in the study area, under the concept of Geomorphological Heritage, aiming to promote the landscape values of this region through its geomorphosites.
Along with researching the most distinctive geological and geomorphological aspects of the Marecchia valley, time has been devoted to studying different approaches and ways of transmitting the values of geological and geomorphological heritage. In fact, Valmarecchia and Montefeltro territories can be seen as an emblematic expression of a dynamic landscape that constantly changes through time and consequentially to human activities, and geosites scattered throughout the study area represent different activity levels and periods.
The basic knowledge and the approach elaborated in the framework of this thesis aims to get the public closer to geological, geomorphological and geoheritage concepts and may be helpful in the formulation of tourism promotion strategies based on geological heritage. The geomorphological knowledge has become the foundation for an integrated geotourism offer at the basin level and can be used to implement services in these territories. The experimentation of innovative methodologies has enabled to reach a broad public, enhancing the geological and geomorphological heritage without any distinction based on social origin and age
Geomorphological mapping as a tool for geoheritage inventory and geotourism promotion: a case study from the middle valley of the Marecchia River (northern Italy)
No full textThe aim of this paper is to present the geomorphological map of the right side of the middle Marecchia valley, in the northern Apennines (Italy), as a basis to enhance the geotouristic potential of the area. This area has been chosen because it is representative of the geological, geomorphological and geodynamic context characterizing the whole Marecchia basin, where a massive allochthonous body (known as Valmarecchia Nappe) widely outcrops. This area consists of Ligurian and Epiligurian formations that overthrust the Umbro-Marchean autochthonous units, drawing a peculiar landscape characterized by high geodiversity and marked above all by landforms developing into various formations. In order to map the main geomorphological features, multi-temporal aerial photos analysis, field survey and bibliographical research, concerning both the geomorphological and cultural values, have been carried out. The landforms highlighted in the map include stream terraces, vertical cliffs, alluvial fans, badlands and landslides; additional geomorphological points of interest have been described and mapped as they represent the most distinctive events in the area. The geomorphological features have been integrated with the additional (ecological, aesthetic, cultural) values to quantify the value of each geosite using an adapted version of Reynard et al. (2016)’s method, from which it emerged that the sites have high scores both in terms of scientific and additional values, making the study area an ideal territory in which implement actions and proposals for geotouristic fruition.L'objectif de cet article est de présenter la carte géomorphologique de la rive droite de la moyenne vallée de la Marecchia (Apenins du Nord) comme base scientifique pour évaluer et mettre en valeur le potentiel géotouristique de cette région du nord de l’Italie. Cette zone a été choisie parce qu'elle est représentative du contexte géologique, géomorphologique et géodynamique qui caractérise l'ensemble du bassin de la Marecchia, où affleure largement un massif allochtone (connu sous le nom de Nappe de Valmarecchia) ; il est constitué de formations liguriennes et épiliguriennes qui chevauchent les unités autochtones ombro-marchesanes, le tout dessinant un paysage particulier caractérisé par une géodiversité élevée et marqué surtout par des reliefs qui se développent dans diverses formations. Afin de cartographier les principales caractéristiques géomorphologiques, des analyses de photographies aériennes diachroniques, des enquêtes de terrain et des recherches bibliographiques, concernant à la fois les valeurs géomorphologiques et culturelles, ont été effectuées. Les formes de relief mises en évidence sur la carte comprennent les terrasses des cours d'eau, les à-pics verticaux, les cônes alluviaux, les badlands et les glissements de terrain. Divers autres points d'intérêt géomorphologique ont été décrits et cartographiés en complément car ils représentent les éléments les plus caractéristiques de la région. La valeur géomorphologique des sites a été combinée aux valeurs additionnelles (écologique, esthétique, culturelle) pour quantifier la valeur de chaque géosite en utilisant une version adaptée de la méthode de Reynard et al. (2016), d'où il ressort que les sites ont des scores élevés à la fois en termes de valeurs scientifiques et additionnelles, ce qui fait de la zone d'étude un territoire idéal pour mettre en œuvre des actions et des propositions de valorisation géotouristique
Geodiversity, geoheritage and georesources assessment methods, a review and a case study in the Marecchia river valley (northern Apennines, Italy)
No full textGeomorphological mapping for geoheritage inventory and geotourism promotion: a case study from the middle valley of the Marecchia river (northern Italy).
No full textGeomorphic approaches to estimate short-term erosion rates: an example from Valmarecchia river system (northern Apennines, Italy)
No full textStudying fluvial dynamics and environments, GIS-based analyses are of fundamental importance to evaluate the network geometry and possible anomalies, and can be particularly useful to estimate modifications in processes and erosion rates. The aim of this paper is to estimate short-term erosion rates attributable to fluvial processes in two sample catchment sub-basins of the Marecchia river valley, by conducting quantitative morphometric analyses in order to calculate various descriptive parameters of the hierarchisation of the river networks and the mean turbid transport of streams (Tu). Sediment yield transported by streams can in fact partially express the amount of erosional processes acting within the drainage basin. The study area includes two sub-basins of the Marecchia valley (Senatello river, 49 km2 and Mazzocco river, 47 km2), chosen because of their similar extent and of the different location in the major catchment basin. Starting from geomorphological maps of the two river basins, the Tu parameter has been calculated and converted in short-term rate (average value 0.21 mm/year). Moreover, the comparison of these short-term mean data with the uplift rates calculated on a regional scale (0.41 ± 0.26 mm/year) in the Marecchia valley confirms that the northern Apennines may represent a non-steady state system
GEOHERITAGE, GEOTOURISM AND ENHANCEMENT OF BALZE DI VERGHERETO AND MT. FUMAIOLO PROTECTED AREA (NORTHERN APENNINE, ITALY)
No full textInternational Standards for the Induction Motor Efficiency Evaluation: a Critical Analysis of the Stray-Load Losses Determination
No full textMotor efficiency has to be measured or calculated in accordance with international standards. The most important standards are the IEEE 112-B, IEC 34-2, and JEC 3 . In this paper, a comparison of the measurement procedures defined by these international standards is reported, together with some comments on the prescribed methodologies. The comparison is based on experimental results obtained by tests on four general-purpose three-phase induction motors. The stray-load loss measurement represents a critical key for the correct evaluation of the motor efficiency. For this reason, a critical analysis of this type of losses has been performed. In particular, in order to understand which are the most critical quantities that influence their evaluation, the stray-load loss sensitivity to the measurement errors is analyzed. In the final part of the paper the temperature influence, on the conventional iron losses, is experimentally analyzed. The performed tests show that the temperature difference between the no-load test and the motor real operative conditions is not negligible
Religione, spazi pubblici, spazi privati
No full textIl saggio propone alcune riflessioni sui concetti di laicità, secolarizzazione, Stato e religione e sul rapporto che si può tessere tra questi. Un rapporto che varia da realtà a realtà, tanto all’interno del perimetro brasiliano-latinoamericano quanto all’interno del contesto italiano-europeo
Dati per il futuro: analisi predittiva e prevenzione della dispersione scolastica
No full textIl capitolo evidenzia la complessità e la non univocità della definizione di dispersione scolastica (dropout), sottolineando come questa eterogeneità comprometta la misurazione e l'efficacia delle politiche. Una revisione sistematica della letteratura (2021-2024) ha messo in luce criticità quali l'uso di strumenti non specifici, la mancanza di dati longitudinali accurati (fondamentali per l'identificazione precoce), e la necessità di una definizione condivisa del costrutto. Viene esplorata la potenziale efficacia dell'Educational Data Mining (EDM) per sviluppare modelli predittivi di allerta precoce, ma si sollevano le problematiche etiche connesse, in particolare il rischio di bias algoritmico e di etichettamento degli studenti. Si raccomanda la collaborazione inter-agenzia per l'integrazione e la condivisione dei dati e la necessità di bilanciare innovazione e tutela etica e pedagogic
Trasformazioni discorsive e identità sociali: il caso dei Lazzari
No full textForeign visitors to Naples in the 18th Century gave accounts of a certain kind of destitute homeless population termed as «lazzari». Originally portrayed as the unruly and dangerous scum of the city’s lowlife, the lazzari undergo a transformation and are subsequently viewed as the prototype for a particular Mediterranean identity: folk who get along with little yet get the best out of life. In reviewing the various changes of outlook that in time led to the crystallisation of the «lazzaro» stereotype, the author attempts to demonstrate how the lazzari or lazzaroni cannot be taken as representing a specific social class that was twice seen to play a political role (in 1647-48 and in 1789), but are rather an expression of a political tradition that is responsible for a number of «social» arguments and representations that finally end up creating representations and «social» subjects.[...
- …
