416 research outputs found
Ruins of War : The Green Sea and the Mysterious Island
No full textThis chapter provides a semiotic investigation of an emblematic space in Palermo, the Foro Italico. After the Second World War, this space was occupied for many years by the ruins left when the city was bombed. Analysing the diachronic evolution of the Foro Italico, the author examines the semantic categories that have defined the space, exploring how the memory of the war has been concealed and inscribed in the post-war rewritings of the place. The chapter reads this space as 'a mysterious island', caught between nature and culture. Referring to different kinds of texts, Marrone illustrates how the practices of various local and migrant communities contribute not only to the resemantisation of space but also to the production of new memories
Tilted beam measurement of VLBI receiver for the South Pole Telescope
No full textWe have developed a 230 and 345 GHz very-long-baseline interferometry (VLBI) receiver for the South Pole Telescope (SPT). With the receiver installed, the SPT has joined the global Event Horizon Telescope (EHT) array. The receiver optics select the 230 or 345 GHz mixers by rotating the tertiary mirror around the optical axis, directing the chief ray from the secondary mirror to the feed horn of the selected frequency band. The tertiary is installed on top of the receiver cryostat, which contains both mixer assemblies. The feed horns are placed symmetrically across the centerline of the telescope optics and tilted inward by 5.7 degrees from the vertical plane so that their beams intersect at the chief ray intersection on the tertiary mirror. We have performed vector beam measurements of the SPT VLBI receiver in both frequency bands. The measurements preserved the relative location of the beams, to establish the relative locations of the phase centers of the two horns. Measurements in two parallel reference planes above the cryostat were used to suppress reflected light. To model the beam, we derive a general expression of the electric field vector on the measurement plane for a tilted beam and infer the feed horn position parameters for both frequency bands by fitting models to data with a Markov chain Monte Carlo (MCMC) method. The inferred parameters such as the tilt angle of the feed horn are in good agreement with the design. We present the measurement setup, amplitude and phase pattern of the beam, and the fitting result here. © 2018 29th IEEE International Symposium on Space Terahertz Technology, ISSTT 2018.All Rights Reserved
Introduction
No full textPrecisely because Seth’s interest in the past can be mistaken for unadulterated longing, his body of work becomes an ideal site for redressing the somewhat impoverished understanding of nostalgia in contemporary comics. In this book, Marrone locates his work between history and memory, along a spectrum of “ambivalent longing.”
Walter Benjamin describes remembrance as “the capacity for endless interpolation into what has been.” This book re-conceives that comparison as more than just a metaphor: Marrone proposes a relation between interpolation into the past and the reader’s capacity for interpolation into the comics text.
Interpolation, as Marrone has defined it, concerns an ambivalent impulse related to the past that is characteristic of what W. J. T. Mitchell calls “the composite imagetext structure of memory,” which parallels the imagetext structure of comics. Interpolation encapsulates these complex relations, referring to the memory-inflected filling of gaps that comics pages invite the reader to undertake.</p
Gianfranco Marrone, Gustoso e saporito. Introduzione al discorso gastronomico, Milano, Bompiani, 2022, 350 p.
No full textItalian semiologist Gianfranco Marrone has just published a new book on the semiotics of gastronomy. The book, in Italian, is part of the ‘Campo Aperto’ series edited by Stefano Bartezzaghi for the publisher Bompiani. Rather than choosing a predictable title such as ‘Semiotics of Gastronomy’, the author has opted for a title defined in the pages of the book as ‘referential’.Le nouvel ouvrage du sémiologue italien Gianfranco Marrone sur la sémiotique de la gastronomie vient d’être publié. Le livre, en italien, fait partie de la série « Campo Aperto » dirigée par Stefano Bartezzaghi pour l’éditeur Bompiani. Plutôt que de choisir un titre prévisible tel que « Sémiotique de la gastronomie », l’auteur a opté pour un titre défini dans les pages du livre comme « référentiel »
BAYESIAN TECHNIQUES FOR COMPARING TIME-DEPENDENT GRMHD SIMULATIONS TO VARIABLE EVENT HORIZON TELESCOPE OBSERVATIONS
No full textThe Event Horizon Telescope (EHT) is a millimeter-wavelength, very-long-baseline interferometry (VLBI) experiment that is capable of observing black holes with horizon-scale resolution. Early observations have revealed variable horizon-scale emission in the Galactic Center black hole, Sagittarius. A* (Sgr A*). Comparing such observations to time-dependent general relativistic magnetohydrodynamic (GRMHD) simulations requires statistical tools that explicitly consider the variability in both the data and the models. We develop here a Bayesian method to compare time-resolved simulation images to variable VLBI data, in order to infer model parameters and perform model comparisons. We use mock EHT data based on GRMHD simulations to explore the robustness of this Bayesian method and contrast it to approaches that do not consider the effects of variability. We find that time-independent models lead to offset values of the inferred parameters with artificially reduced uncertainties. Moreover, neglecting the variability in the data and the models often leads to erroneous model selections. We finally apply our method to the early EHT data on Sgr A*.NSF [AST-1207752, AST-1440254, AST 1108753, AST 1312034, 1228509]; NASA/NSF TCAN award [NNX14AB48G]; NFS GRFP [DGE 1144085]This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]
Microstorie di romanizzazione. Le iscrizioni del sepolcreto rurale di Cerrione.
No full textThis volume contains the edition and commentary of sixty funerary inscriptions found at the archaeological site of Cerrione in the province of Biella, in north-eastern Piedmont, near the Bessa ancient gold district, in the territory once belonging to the Roman colony of Eporedia. Seven inscriptions were written in the so-called Lepontic alphabet, while fifty-three were written in the Latin alphabet. All these inscriptions were found in a rural necropolis, which appears to have been used from the early first century BC to the late fourth century AD. More than two hundred tombs were brought to light in this necropolis of which about eighty were marked with stone slabs. The burials that are identified by inscriptions can be dated through their archaeological contexts to a period that goes from the early first century BC to the third century AD.
Studying these epigraphic texts with special attention to onomastics allows the book's author to investigate the juridical status, the social ranking, the family networks, and the ethnic identification of the people who were buried in the tombs. Furthermore, the analysis of the graphic and linguistic features of these funerary inscriptions facilitates the understanding of the characteristics and the peculiarities of the cultural transition that this area went through when they were written. In fact, not only does this work offer a socio-cultural investigation of the individuals who lived in this settlement and made use of its cemetery, but, reconstructing a number of micro-histories, it also contributes to understanding the dynamics of the contacts between the indigenous Celtic element and the exogenous Roman influence. The meeting of these two different cultural systems gave birth to the phenomena of hybridization and transition that eventually led to the Romanization of this area
Holocene paleoclimate inferred from salinity histories of adjacent lakes in southwestern Sicily (Italy)
No full textMarked uncertainties persist regarding the climatic evolution of the Mediterranean region during the Holocene. For instance, whether moisture availability gradually decreased, remained relatively constant, or increased during the last 7000 years remains a matter of debate. To assess Holocene limnology, hydrology and moisture dynamics, the coastal lakes Lago Preola and Gorgo Basso, located in southwestern Sicily, were investigated through several stratigraphic analyses of ostracodes, including multivariate analyses of assemblages, transfer functions of salinity, and biochemical analyses of valves (Sr/Ca, δ18O and δ13C). During the early Holocene, the Gorgo Basso and Lago Preola ostracode records are similar. After an initial period of moderate salinity (1690–6100 mg/l from ca. 10,000–8190 cal yr BP), syndepositional or diagenetic dissolution of ostracode valves suggests that salinity declined to <250 mg/L from ca. 8190 to 7000 cal yr BP at both sites. After ca. 6250 cal yr BP, the ostracode records are strikingly different. Lago Preola became much more saline, with paleosalinity values that ranged from 2270 to about 24,420 mg/L. We suggest that Lago Preola's change from a freshwater to mesosaline lake at about 6250 cal yr BP was related to sea level rise and resulting intrusion of seawater-influenced groundwater. In contrast, Gorgo Basso remained a freshwater lake. The salinity of Gorgo Basso declined somewhat after 6250 cal yr BP, in comparison to the early Holocene, ranging from about 550 to 1680 mg/L. Cypria ophtalmica, a species capable of rapid swimming and flourishing in waters with low dissolved oxygen levels, became dominant at approximately the time when Greek civilization took root in Sicily (2600 cal yr BP), and it completely dominates the record during Roman occupation (roughly 2100 to 1700 cal yr BP). These freshwater conditions at Gorgo Basso suggest high effective moisture when evergreen olive-oak forests collapsed in response to increased Greco-Roman land use and fire. Ostracode valve geochemistry (Sr/Ca, δ18O) suggests significant changes in early vs. late Holocene hydrochemistry, either as changes in salinity or in the seasonality of precipitation. Harmonizing the autecological and geochemical data from Gorgo Basso suggests the latter was more likely, with relatively more late Holocene precipitation falling during the spring, summer, and fall, than winter compared to the early Holocene. Our ostracode-inferred paleosalinity data indicate that moisture availability did not decline during the late Holocene in the central Mediterranean region. Instead, moisture availability was lowest during the early Holocene, and most abundant during the late Holocene
Encyclopedia of Italian Literary Studies
No full text"The Encyclopedia of Italian Literary Studies" of which the present writer
is co-editor, in collaboration with Princeton University where the present
writer was visiting Professor. It is a wide investigation in the Italian
culture, organized in topics, works and authors, that are normally unusual
for their innovative choices. As an instance, all the list of cities that
are considered as places of anthropological and literary memory as well as
circuit of local imagery. In particular, the present writer is the author
of the chapters devoted to the history of Italian direction, Pirandello
and several of his works, as well as recent playwrights as Antonio
Tarantino, Edoardo Erba, Giuseppe Manfridi and Enzo Moscato that are first
introduced in the American circuit
Correction to: Sloshing wing dynamics - 2nd year project overview
No full textCorrection Notice Alex Skillen added to the Author list as he contributed significantly to the project and paper
Variability in GRMHD Simulations of Sgr A* : Implications for EHT Closure Phase Observations
No full textClosure phases along different baseline triangles carry a large amount of information regarding the structures of the images of black holes in interferometric observations with the Event Horizon Telescope. We use long time span, high cadence, GRMHD+radiative transfer models of Sgr A* to investigate the expected variability of closure phases in such observations. We find that, in general, closure phases along small baseline triangles show little variability, except in the cases when one of the triangle vertices crosses one of the small regions of low visibility amplitude. The closure phase variability increases with the size of the baseline triangle, as larger baselines probe the small-scale structures of the images, which are highly variable. On average, the funnel-dominated MAD models show less closure phase variability than the disk-dominated SANE models, even in the large baseline triangles, because the images from the latter are more sensitive to the turbulence in the accretion flow. Our results suggest that image reconstruction techniques need to explicitly take into account the closure phase variability, especially if the quality and quantity of data allow for a detailed characterization of the nature of variability. This also implies that, if image reconstruction techniques that rely on the assumption of a static image are utilized, regions of the u–v space that show a high level of variability will need to be identified and excised
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