2,486 research outputs found
Carteggio Volpe Violante
No full textedizione di un carteggio fra due importanti storici italiani del Novecent
Uguali e diversi: il discorso interculturale del sistema scolastico
No full textIl saggio è contenuto nel volume a cura di Giacomo Mulé e Piero Violante, dal titolo "Elogio della confusione", edito da Flaccovio Editore, Palermo, 2005
Large deep-seated slump structure off Ischia volcanic island, Eastern Tyrrhenian sea (Italy)
No full textIschia island is located over the Campania sector of Eastern
Tyrrhenian margin and represents the sub-aerial section of a
larger, E-W trending volcanic ridge including others submerged
or buried volcanic edifices. The island itself result from the
coalescence of a multitude of small to medium scale eruptions
leading to the emplacement of domes, lava flow and pyroclastic
deposits and ignimbrites (VEZZOLI et al., 1988) ranging from
alkali basalts to trachytes. The oldest basement dates back to 150
ky and crops out along the perimeter of the island especially to
the south. Latest eruption occurred in 1302 A.D. and together
with strong hydrothermal activity, ground uplift and seismic
shaking indicates the presence of a still active magmatic reservoir
at depth. Most recent (Holocene) magmatic activity with local
volcanic eruptions has clustered in the eastern island’s sector the
while central sector is dominated by the Mt. Epomeo, consisting
of an ignimbritic tuff (Green tuff Auct.) uplifted of 600-700 m in
the past 33ka.
In the past decade the island’s offshore has been the object of
extensive hydrographic and marine geophysical surveys that have
shown the structural complexity of the undersea sections and
have overall shown the importance of gravity failures in island’s
evolution. In particular a 1.5-3 km3 debris avalanche due to a
subaerial and/or submarine flank collapse was emplaced along
the steep and unbuttressed island’s flank during pre-historical or
even historical times (CHIOCCI & DE ALTERIIS, 2006; de Alteriis
et al., 2010) whereas three other similar deposits of comparable
volumes were found over the continental shelf to the west and to
the north (VIOLANTE et al, 2004; DE ALTERIIS & VIOLANTE,
2009).
Here we report a previously unrecognized deep-seated slump
structure and associated surficial mass wasting phenomena which
occur off Ischia south-western flank. Recently acquired
hydrological and geophysical data lead to identify the
morphological features and the internal organization of the failed
sediments which spread along the continental slope. The extent
of this deep-seated deformations and the deep structural levels
involved lead to investigate on the influence played by volcanic
processes on slope failure.
DATA AND METHODS
Our dataset was acquired during the geophysical cruise
PECOS 2010 carried out on R/V Urania (Consiglio Nazionale
delle Ricerche, CNR, Italy) between December 22th 2010 and
January 2nd 2011 in the frame of a project leaded by Istituto per
l’Ambiente Marino Costiero, (IAMC-CNR), Naples-Italy with
the collaboration of Dipartimento di Scienze della Terra e del
Mare (Palermo University), Palermo-Italy regarding coastal and
offshore slope instability in the Bay of Napoli.
The Ischia southern slope was explored through a multibeam
survey and a single-channel seismic survey. Acquisition was
carried out between 400 and 1200 m. The bathymetric data were
collected using a hull mounted Reson 8160 multibeam sonar.
Resolution resulted in a 20x20 m implemented with 50x50
gridded size provided by a previously collected data. The seismic
survey consisted of 6 dip-lines NNE-SSW run along the slope
and 5 cross lines parallel to the slope totalling 170 km. Average
spacing between diplines was slightly less than 1 km while
spacing between crosslines was variable from 1.2 to 2.5 km.
NNE-SSW and WNW-ESE directions. The acoustic source used
was a 1Kjoule high-energy power supply system with a multitips
(400) sparker array, fired at 2s time interval.
RESULTS
The collected data show that a wide submerged area of 350
km2, between 400 to 1200 m depths is undergoing slow-moving
deformation and associated secondary mass wasting phenomena.
Morphological features include trenches, counterscarps, bulging
and both extensional and contractional features while internal
deformations show typical landward dipping reflectors with
strong evidence of synsedimentary faulting and asymmetric
anticlines.
Deformation processes operate at various scales generating
folds with wavelength ranging from hundreds meters to
kilometers. Extensional and rotational rupture surfaces sole out at
various low-angle detachment planes located at depths from few
hundred meters to 1 kilometer in subsurface.
The internal organization of the failing mass shows different
pattern of deformation that allows the identification of three main units: 1) a basal unit consisting of a very broad, asymmetric
slump fold with a wavelength of about 5 km and amplitude of
some 100 m. The fold axis is not vertical and the three
dimensional interpretation indicates that the structure is not
cylindrical. The fold strictly correlates with a morphological
bulge seen on bathymetry at about 20 km south of Ischia Island.
2) A wedge shaped intermediate unit characterized by
discontinuous and folded reflectors, locally showing basal
detachment planes and compressional features. 3) A surficial
slump unit affecting the upper and middle slope characterized by
a basal decollément surface and normal growth faults that sole
out at depths ranging from 70 to 40 m in subsurface. It is still
unclear whether the landslide process can be favored by the
volcano-tectonic evolution and rapid vertical accretion of Ischia
volcano or is solely due to possibly volcanic spreading of the
Ischia Island.
REFERENCES
CHIOCCI, F. L. & DE ALTERIIS, G. (2006) - The Ischia debris
avalanche. First, clear submarine evidence in the
Mediterranean of a volcanic island pre-historic collapse.
Terra Nova, 18, 202–209.
DE ALTERIIS, G., INSINGA D. ET AL. (2010) - Age of submarine
debris avalanches and tephrostratigraphy offshore Ischia
Island, Tyrrhenian Sea, Italy. Marine Geology 278 (2010) 1–
18.
DE ALTERIIS, G. & VIOLANTE, C. (2009) - Catastrophic
landslides off Ischia volcanic island (Italy) during prehistory.
In: C. Violante, (ed.) Geohazard in Rocky Coastal Areas.
Geological Society, London, Special Publications, 322, 73–
104.
VEZZOLI, L. (1988) Island of Ischia. Quaderni de ‘La Ricerca
Scientifica’ Progetto finalizzato ‘Geodinamica’, CNR
Monografie finali, 10.
VIOLANTE, C., BUDILLON, F., ET AL. (2004) - Submerged
hummocky topographies and relations with landslides on the
northwestern flank of Ischia island, southern Italy. In:
‘Occurrence and mechanisms of flow-like landslides in
natural slopes and earthfills’, Sorrento, 14–16 May 2003.
AGI, 2, 309–315
Le intercettazioni di conversazioni o comunicazioni. Ambito di operatività e vincoli di fonte primaria
No full text
E-mail aziendale? Solo per lavoro
No full textIl contributo mira a commentare la sentenza del Tribunale Ordinario di Torino, Sez. dist. di Chivasso, in cui si analizza la violazione della libertà di corrispondenza. Molte aziende, per agevolare il lavoro dei dipendenti, gli attribuiscono l'uso di un indirizzo di email aziendale. I messaggi inviati e ricevuti con quell'indirizzo sono tecnicamente nella disponibilità dell'azienda. Ma quale utilizzo può effettivamente farne l'azienda secondo le norme sulla privacy
Allocution à l'occasion du décès de M. Cinzio Violante, associé étranger de l'Académie
No full textBabelon Jean-Pierre. Allocution à l'occasion du décès de M. Cinzio Violante, associé étranger de l'Académie. In: Comptes rendus des séances de l'Académie des Inscriptions et Belles-Lettres, 145ᵉ année, N. 1, 2001. pp. 691-692
A propósito de Violante de Cysneiros: Orpheu, Nova Sapho e as poéticas e políticas de género no Modernismo português
No full textThis essay takes the publication of poems by an invented female author, Violante de Cysneiros, in the second issue of Orpheu as its point of departure toward a preliminary inquiry into the relationship between fictional characters of female avant-garde artists in some of the canonical works of Portuguese Modernism (such as, besides Orpheu, Mário de Sá-Carneiro’s A confissão de Lúcio and José de Almada Negreiros’s A Engomadeira) and the aesthetic and political legacy of Decadentism, suppressed for the most part by dominant historical perspectives on the Modernist era in Portugal. The case study that sustains this project focuses on the 1912 novel Nova Sapho by Visconde de Vila Moura, whose protagonist, a noblewoman from Minho named Maria Peregrina, a lesbian and poet of genius, anticipates such later Modernist female creations as Sá-Carneiro’s American in Paris and Almada’s unorthodox laundress. Nova Sapho also stands out due to its symbiotic intertwining of Northern nativist regionalism with a broadly cosmopolitan outlook, embodied in the experiences of Maria Peregrina’s travels and in her intertextual engagements. This symbiosis contradicts the polarization, drawn by Fernando Pessoa and broadly accepted in the scholarship on Portuguese Modernism, between the narrowly nationalist and regional perspective of the Northern writers associated with A Águia and the cosmopolitanism of the “Lisbon school” (i.e. Orpheu), permeated by a multiplicity of international modern aesthetic trends.Tomando como o ponto de partida o fenómeno da colaboração no Orpheu 2 da poetisa inventada Violante de Cysneiros, este ensaio esboça uma interrogação preliminar sobre a relação entre as figurações subjetificadas do protagonismo feminino associado a uma poética de vanguarda em alguns dos textos canónicos do Modernismo português (como, além do próprio Orpheu, A confissão de Lúcio de Mário de Sá-Carneiro e A Engomadeira de José de Almada Negreiros) e a herança estética e política decadentista, esta última em boa parte suprimida pela visão da época modernista consolidada na perspetiva histórico-literária dominante. O estudo de caso que sustenta esta proposta de revisão foca um texto em particular, o romance Nova Sapho (1912) do Visconde de Vila Moura, cuja protagonista, uma fidalga minhota de nome Maria Peregrina, lésbica e poetisa de génio, antecipa tais personagens modernistas posteriores como a “americana fulva” de Sá-Carneiro e a “engomadeira” de Almada. O que distingue ainda o romance Nova Sapho é a sua conjugação simbiótica do nativismo regionalista do Norte com uma visão amplamente cosmopolita — corporizada através da itinerância experiencial e intertextual da Maria Peregrina —, princípio que contradiz a polarização, avançada por Fernando Pessoa e largamente aceite pelos estudiosos do Modernismo português, entre o regionalismo e nacionalismo estreitos cultivados pelo círculo d’A Águia e o cosmopolitismo agregador de todas as tendências artísticas modernas, cultivado pela “escola de Lisboa” (Pessoa), ou seja, o grupo do Orpheu
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