1,722,123 research outputs found
ALGORITHMS IN MATLAB TO COMPUTE A LOCAL GEOID MODEL FOR GEOMATICS PURPOSES
No full textThe aim of the paper is to show a methodology in order to build a local geoid model using the Compute-Remove-Restore technique; to achieve this aim, suitable algorithms in Matlab® environment were developed. The knowledge of a geoid model assumes an important role in the field of engineering, geosciences and geomatics since that it allows the definition of physical heights or the components of the deflection of the vertical on a specific area. The area taken into consideration for the research is the Campania region (Italy). By comparing the geoid undulation values of the model developed in this paper with those extracted from the benchmarks over this area derived from the national levelling network, it is possible to obtain centimetre accuracy
Survey by Airborne Laser Scanner of open large structure: A case study of Pompeii Amphitheatre
No full textThe purpose of this paper is to show the potential of Airborne Laser Scanner (ALS) in the survey of large and open structures in the Cultural Heritage field. Nowadays, this technology is becoming spread in the field of Cultural Heritage thanks to the possibility to obtain a large number of points in a short time. In fact, the latest generation of ALS sensors are able to acquire up to several million measurements per second and to generate an elevated point density. In addition, if this sensor is combined with digital camera, it is possible to obtain even RGB colour information. In this paper are described the features, methods and techniques for acquisition by ALS system. In particular, it is presented a wide analyse of the three dataset (calibration, laser distance measurements and Position-Orientation System data). The assembly of these datasets allows obtaining the correct georeferncing of the point clouds. A case study of a survey carried out by ALS system on the archaeological site of Pompeii (Italy) is presented. In this case, all the steps necessary to realize the survey are described (planning, acquisition and post-processing task). Also, starting from the point clouds, in CAD environment a classic representation (in a suitable scale) of Roman amphitheatre is showed
Survey by Airborne Laser Scanner of open large structure: A case study of Pompeii Amphitheatre
Full text linkThe purpose of this paper is to show the potential of Airborne Laser Scanner (ALS) in the survey of large and
open structures in the Cultural Heritage field. Nowadays, this technology is becoming spread in the field of Cultural
Heritage thanks to the possibility to obtain a large number of points in a short time. In fact, the latest generation of ALS
sensors are able to acquire up to several million measurements per second and to generate an elevated point density. In
addition, if this sensor is combined with digital camera, it is possible to obtain even RGB colour information. In this paper
are described the features, methods and techniques for acquisition by ALS system. In particular, it is presented a wide
analyse of the three dataset (calibration, laser distance measurements and Position-Orientation System data). The assembly
of these datasets allows obtaining the correct georeferncing of the point clouds. A case study of a survey carried out by
ALS system on the archaeological site of Pompeii (Italy) is presented. In this case, all the steps necessary to realize the
survey are described (planning, acquisition and post-processing task). Also, starting from the point clouds, in CAD
environment a classic representation (in a suitable scale) of Roman amphitheatre is showed
Recensione al volume di Giovanni Minnucci “Alberici Gentilis De papatu Romano Antichristo. Recognovit e codice autographo bodleiano d'Orville 607”
No full textLa recensione, pubblicata nella sezione "Proposte di lettura", riguarda l'attesa edizione Giovanni Minnucci, Alberici Gentilis De papatu Romano Antichristo. Recognovit
e codice autographo bodleiano d’Orville 607. Archivio per la Storia del Diritto
Medioevale e Moderno – Studi e Testi, Miscellanee raccolte da Filippo Liotta. Milano, Monduzzi, 2018, pp. CLX
Gruppi di imprese e soggettività passiva nell'imposta sul valore aggiunto
No full textLa Legge di Bilancio 2017 ha introdotto nell'ordinamento giuridico italiano il regime impositivo di matrice europea conosciuto come “gruppo i.v.a.”, che apporta interessanti innovazioni di carattere pratico e teorico nella concezione dei gruppi di imprese e nel relativo trattamento ai fini tributari. In particolare, la disciplina del gruppo i.v.a. prevede che, per effetto dell’esercizio di una specifica opzione, il gruppo di imprese – definito sulla base di peculiari legami di carattere finanziario, economico e organizzativo – assurga al ruolo di “soggetto passivo” dell’imposta sul valore aggiunto. Ciò costituisce una novità di assoluto rilievo nel nostro ordinamento, in quanto il gruppo di imprese, pur configurandosi quale entità economicamente unitaria, non era mai stato riconosciuto dotato di soggettività giuridica. La ricerca, dunque, ha perseguito l’obiettivo di esaminare compiutamente le caratteristiche, i presupposti e gli effetti del regime di gruppo, allo scopo di indagare l’attitudine del gruppo ad atteggiarsi quale “soggetto” (e – segnatamente – quale “soggetto passivo”) nel sistema dell’imposta sul valore aggiunto
Structural control in sinkhole development and speleogenesis: a case study from the High Murge karst landscape (Apulia, Italy).
Full text linkThe Murge plateau is the main karst sector of Apulia, an almost entirely carbonate region of SE Italy. It can be, in
turn, subdivided into two sectors: High Murge, the inland plateau, where remnants of an ancient tropical karst are
still recognizable; and Low Murge, closer to the Adriatic Sea, with smoother karst morphologies and landforms,
but, at the same time, hosting some of the longest underground karst system in the region (Parise, 1998, 2006).
Even though showing low energy relief, the landscape of High Murge is very articulated when examined at greater
detail, with several interesting karst features. Among these, sinkholes are definitely the most significant, showing
a variety of typologies and, at the same time, a high frequency, both as individual features and as coalescent
landforms, giving origin to more complex depressions (Parise, 2011). Previous studies carried out in the High
Murge through morphometric analysis of the main sinkholes identified on the 1:25,000 scale topographic maps
from the Italian Army Geographical Institute indicated their likely genesis in a low relief cockpit karst (Sauro,
1991). Over such landscape, developed in Upper Tertiary, a hydrographic pattern was superimposed, that partly
opened some of the depressions, also dismantling sectors of the karst relief and producing talus deposits (Caldara
& Ciaranfi, 1988).
In the present work we take into consideration the southern countryside of Ruvo di Puglia. Choice of the area,
which extends over 15 km2, was dictated by presence of a high number of sinkholes, and of several important
caves with prevailing vertical development, including the deepest pit ever explored in Apulia (Grave della
Ferratella, depth - 320 m). The cave is nowadays not accessible, due to clogging caused by land use changes
during the 80’s.
Based upon extensive field surveys and interpretation of multi-year aerial photographs (time range 1955-2003),
integrated by surveying in selected caves, the main hydro-geomorphological and karst features of the area
have been outlined. Structural data have been collected at both the outcrop and within caves, in order to assess
the likely connections between the karst drainage pattern and the main tectonic features. Eventually, a karst
geomorphological map has been produced to describe the karst character of the landforms in the area, with a
distinction of the recognized sinkholes in different categories in function of their genesis. In addition to the strictly
geomorphological theme, outcomes of this study may be of interest to cavers for planning future activities in this
and nearby areas, in the attempt to identify new caves, or extend the present development of those already known
Shallow-marine systems in a wedge-top basin setting: an example from the middle-upper Pliocene deposits of the Southern Apennines mountain front (Basilicata region, South Italy)
No full textMiddle-upper Pliocene wedge-top deposits cropping out near
San Mauro Forte village (Basilicata region), along the Southern
Apennnines chain-front, unconformably overlie deformed, lower
Pliocene deposits and the pre-Pliocene substratum, represented by
Cretaceous to Miocene allochtonous units. The middle-upper Pliocene
sedimentary succession is markedly transgressive, with deltaic sands
and gravels, overlain by shallow-marine to shelfal hybrid arenites (panchine
Auctt.) and open-shelf hemipelagic deposits. This sedimentary
succession was syndepositionally deformed, as shown by growth strata
and progressive unconformities. Different ranks of unconformity
surfaces separate hierarchically ordered, informal stratigraphic
units. Two main units have been recognised: the lower unit (desi -
gnated as Sequence 1) is mainly represented by siliciclastic deposits;
the upper one (Sequence 2), is made of hybrid arenites and the overlying
hemipelagites. Growth strata in the hybrid arenites indicate a
strong synsedimentary control of a N-S trending anticline-thrust.
Siliciclastic deposits of Sequence 1 can be ascribed to coarsegrained
delta environments, fed by hyperpychnal flows arising from
the chain-front and spreading out towards the foreland areas.
Hybrid arenites of Sequence 2 has a mixed carbonate-siliciclastic to
pure silicilastic composition and was deposited in storm-driven,
shoreface to open-shelf environments. Skeletal grains of Sequence 2
belong to the foramol-type association, in good agreement with other
Neogene and Quaternary mixed carbonate-siliciclastic systems of the
Mediterranean area. Stratigraphic-sedimentological data suggest
that the aforementioned uplift of the anticline-thrust played a leading
role in the establishment of favourable conditions for carbonate
production. Regional-scale subsidence has brought to the final
drowning of these carbonate factories, overwhelmed by hemipelagic
sedimentation
Strukturni vpliv razvoja kraškega površja na polotoku salento (Apulija, jv Italija)
Full text linkApulia region (SE Italy) is particularly prone to karst processes, due to the extensive presence of carbonate rocks. Karst marks the whole region, and represents the main landscape features, with a variety of landforms ranging from large-size dolines, to poljes, and fluvial-karstic valleys; given the configuration of Apulia, a great role in the presence of widespread karst features is also played by coastal landforms. The Salento peninsula, in southern Apulia, is characterized by very low relief and cropping out of different types of carbonate rocks, ranging in age from Cretaceous to Quaternary. Recognition of karst features in this setting, and the likely implications for geohazards, is quite difficult, because of the subtleness of the features, and the facility for man to cancel or modify them. Nevertheless, the presence of dolines is definitely a typical aspect of the area, which also implies some consequences in terms of risk to the built-up environment. This work focuses on the area of Barbarano del Capo, where two cover-collapse dolines are well known in the geological literature as Vora Grande and Vora Piccola. Despite the fact that morphometrical and stratigraphical features have already been investigated, few informations are available about the hydro-geomorphological and structural settings of the area. This article presents the results of morphological and structural analyses, aimed to understand the role of tectonics in the development of karst features, and their evolution
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