11,764 research outputs found
Un "Fiore" tra i commenti
No full textCome nasce l’idea del commento a un poemetto duecentesco, attorno al quale aleggia il nome di Dante Alighieri? Si ripercorrerà la genesi del lavoro di curatela realizzato per gli Oscar Mondadori nel 1996, attraverso l’analisi delle componenti fondamentali: la destinazione del volume, le necessità concomitanti di scientificità e di divulgazione, le scelte finali. A diciotto anni di distanza se ne tenta un bilancio anche alla luce degli sviluppi di ricerca successivi e degli orientamenti interpretativi odierni.The article charts the reception of the annotated edition of The Flower published by Luca Carlo Rossi in the pocketbook edition of Oscar Mondadori (Milan) in 1996. An account is given of the editorial decisions, the criteria of textual selection, the intended readership, the attribution of the work to Dante and the reactions that the volume elicited. Subsequent commentaries on The Flower are then contextualized and an alternative title is proposed in place of the traditional and apocryphal one
Caleidoscopio letterario
No full text"Caleidoscopio Letterario" Conversazioni a cura di Marco Belpoliti e Nunzia Palmieri -
Progetto finanziato nell'ambito del bando di Ateneo per iniziative di Public Engagement 2018 -
In collaborazione con il Premio Narrativa Bergamo -
"Letteratura e Fotografia": Giorgio Falco con Nunzia Palmieri; mercoledì, 17 ottobre 2018
"Letteratura e Memoria": Helena Janeczek con Luca Carlo Rossi; lunedì, 12 novembre 2018
"Letteratura e Scuola": Domenico Starnone con Marco Belpoliti; giovedì, 29 novembre 2018
"Letteratura e Nuove famiglie": Diego De Silva con Massimo Rocchi; giovedì, 13 dicembre 201
Guido Rossi e la regolazione del mercato
No full textIl contributo, presentato in occasione del seminario per gli 80 anni di Guido Rossi, riflette sul pensiero e l'opera del giurista in materia di regolazione dei mercati e sistema dei controlli. Viene messo in luce il suo costante impegno intellettuale e civile contro le rendite di posizione e a favore di un mercato trasparente, contendibile ed efficiente. L'autore discute criticamente temi come l’abuso dei meccanismi di mercato, la separazione tra proprietà e controllo, e il ruolo delle istituzioni nella vigilanza e semplificazione normativa, nel solco dell’eredità culturale di Guido Rossi
Un problema aperto: «lo bello stilo» virgiliano di Dante
No full textIn Inf. 1, 79-80 Dante declares that Virgil is his sole source for poetry and presents himself as Virgil's follower. What does really Dante mean? There has been much discussion of exactly what the «bello stilo» is and where it is to be found in Dante's work, but it is not satisfactory. Perhaps Dante's formulation is only a surprising claim for a poetic identity, a strategy for showing himself as a new ‘classic’ poet
Modelli Digitali 3D / Accessibilità e fruizione inclusiva | 3D Digital Models / Accessibility and Inclusive Fruition
No full textThe use of active/passive sensors allows surfaces to be discretized on the basis of point clouds associated with radiometric information. The validity of the available applications is widely documented: in the last two decades, scientific articles on the subject have grown from hundreds to tens of thousands.
Polygon meshes generated directly (scan-to-BIM) or with the support of shared, interoperable processes can be navigated with powerful Real-Time Rendering engines to verify their characteristics within the image/video. Digital Twins (DT), when embedded within multimedia workflows and experiences (BIM-HBIM), can be managed by algorithms and mathematical models for the analysis and manipulation of geometric data, i.e., the modification of faithful and mirror copies of the digitally reconstructed product. The change in condition of the physical dual is retroactively controlled to (Field Information Modelling, FIM) record mutations, degradation or design changes in shapes.
However, the massive availability of uninterpreted models requires an optimised development of methods for semantic segmentation and classification of data, information processing and analysis, as well as the integration of additional content from alternative sources and different sensor types.
Ontologies of datasets - processed by Machine Learning (ML) and Deep Learning (DL) algorithms for the fast recognition of visual patterns (semantic segmentation) – have confirmed the validity of the services offered by the network: bringing the research of individuals into dialogue with Data Science is a necessity rather than an opportunity, especially for Cultural Heritage. The development of procedures that operate on the textures of models, projecting and visualising 2D results on the obtained geometries, also makes it possible to integrate and superimpose data and information from specialised investigations by experts in the field.
The attention of research therefore focused on the evolution of digital language, and, contextually on the standardization of codes and processes to apply to web content. The latter should ensure widespread and dynamic access in compliance with European recommendations and guidelines. In this scenario, the proposed issue of DISEGNARECON intends to collect and compare contributions that, in the international panorama, illustrate the most recent scientific developments with respect to the treatment of polygon meshes and discrete models.
Case studies will be opportunities to demonstrate the reliability of the achieved results, i.e., to discuss inconsistencies and limitations that can guide shared paths.
For the reasons stated in the preamble, discussion topics will include:
• investigations on the relationship between discrete and structured models to generate reversible types of networked and real-time rendered models for game-engines;
• new museum exhibition and fruition techniques and multi-platform simulations (Common Data Environment) of experimental models for participatory dissemination;
• methods for classifying 3D points useful for salient maps;
• integration between survey and characterisation of 3D points derived from images/videos;
• machine learning/deep learning applied to the processing of point clouds derived from image/video acquisition;
• optimisation functions of algorithms from the computing environment inherent to mathematical modelling and neural network architecture for learning on graphs and pattern recognition for segmentation and semantic processing;
• interactive circularity between acquisition, processing and inductive verification of processes;
• development of standardised methodologies for morphological analysis, degradation mapping or enrichment and computerisation of data related to network services;
• analysis and control of errors and/or inconsistencies (bias) in the input/output material of DL/ML/AI machines
Dalle organizzazioni di volontariato alla cultura del volontariato: tracce di un’evoluzione
No full textDante tradotto in italiano
No full textThe author reflects on the comprehensibility of Dante’s language
and the necessity of the interpretation of the Commedia, implemented
through paraphrases and translations that have multiplied on the occasion
of the centenary. Some examples of transfers of Dante’s text show the
merits and limits of these unavoidable operations
System-on-chip Computing and Interconnection Architectures for Telecommunications and Signal Processing
No full textThis dissertation proposes novel architectures and design techniques targeting SoC building blocks for telecommunications and signal processing applications.
Hardware implementation of Low-Density Parity-Check decoders is approached at both the algorithmic and the architecture level. Low-Density Parity-Check codes are a promising coding scheme for future communication standards due to their outstanding error correction performance.
This work proposes a methodology for analyzing effects of finite precision arithmetic on error correction performance and hardware complexity. The methodology is throughout employed for co-designing the decoder. First, a low-complexity check node based on the P-output decoding principle is designed and characterized on a CMOS standard-cells library. Results demonstrate implementation loss below 0.2 dB down to BER of 10^{-8} and a saving in complexity up to 59% with respect to other works in recent literature. High-throughput and low-latency issues are addressed with modified single-phase decoding schedules. A new "memory-aware" schedule is proposed requiring down to 20% of memory with respect to the traditional two-phase flooding decoding. Additionally, throughput is doubled and logic complexity reduced of 12%. These advantages are traded-off with error correction performance, thus making the solution attractive only for long codes, as those adopted in the DVB-S2 standard. The "layered decoding" principle is extended to those codes not specifically conceived for this technique. Proposed architectures exhibit complexity savings in the order of 40% for both area and power consumption figures, while implementation loss is smaller than 0.05 dB.
Most modern communication standards employ Orthogonal Frequency Division Multiplexing as part of their physical layer. The core of OFDM is the Fast Fourier Transform and its inverse in charge of symbols (de)modulation. Requirements on throughput and energy efficiency call for FFT hardware implementation, while ubiquity of FFT suggests the design of parametric, re-configurable and re-usable IP hardware macrocells. In this context, this thesis describes an FFT/IFFT core compiler particularly suited for implementation of OFDM communication systems. The tool employs an accuracy-driven configuration engine which automatically profiles the internal arithmetic and generates a core with minimum operands bit-width and thus minimum circuit complexity. The engine performs a closed-loop optimization over three different internal arithmetic models (fixed-point, block floating-point and convergent block floating-point) using the numerical accuracy budget given by the user as a reference point. The flexibility and re-usability of the proposed macrocell are illustrated through several case studies which encompass all current state-of-the-art OFDM communications standards (WLAN, WMAN, xDSL, DVB-T/H, DAB and UWB). Implementations results are presented for two deep sub-micron standard-cells libraries (65 and 90 nm) and commercially available FPGA devices. Compared with other FFT core compilers, the proposed environment produces macrocells with lower circuit complexity and same system level performance (throughput, transform size and numerical accuracy).
The final part of this dissertation focuses on the Network-on-Chip design paradigm whose goal is building scalable communication infrastructures connecting hundreds of core. A low-complexity link architecture for mesochronous on-chip communication is discussed. The link enables skew constraint looseness in the clock tree synthesis, frequency speed-up, power consumption reduction and faster back-end turnarounds. The proposed architecture reaches a maximum clock frequency of 1 GHz on 65 nm low-leakage CMOS standard-cells library. In a complex test case with a full-blown NoC infrastructure, the link overhead is only 3% of chip area and 0.5% of leakage power consumption.
Finally, a new methodology, named metacoding, is proposed. Metacoding generates correct-by-construction technology independent RTL codebases for NoC building blocks. The RTL coding phase is abstracted and modeled with an Object Oriented framework, integrated within a commercial tool for IP packaging (Synopsys CoreTools suite). Compared with traditional coding styles based on pre-processor directives, metacoding produces 65% smaller codebases and reduces the configurations to verify up to three orders of magnitude
SOME CONSIDERATION ABOUT THE EXTREME RAINFALL IN A MEDITERRANEAN AREA
No full textIn the time series of annual maximum daily rainfall there are outliers that require great attention, their study is often carried out with a regional analysis.
About twenty years ago the National Group for Defence from Hydrogeological Disasters for the Italian rivers developed a regional methodology known as VAPI procedure (Rossi, F. and P. Villani, 1994). This procedure is based on: a) the use of TCEV distribution (Rossi et al., 1984); b) a three levels hierarchical regionalization procedure.
The extreme rainfall can't be considered independent and identically distributed variables. The VAPI procedure solves this problem by using the TCEV distribution. It assumes that the individual rainfall can be expressed as a mixture of two exponential components: a) the first describes the ordinary events (more frequent and less severe on average); b) the second describes the extraordinary extremes (more severe and less frequent). In recent years, a new procedure for the regionalization of extreme rainfall has been implementing taking into account their different meteorological structures (De Luca et al., 2010).
The baroclinic cyclogenesis process is the dominant meteorological phenomenon in the Mediterranean and generally produces ordinary extremes. The extraordinary events are due to two different components: isolated convective cells and tropical like cyclones, defined as hurricane-like cyclones in the Mediterranean environment. The first component affects areas of small extension then it is relevant only for urban basins. The second component consists of hurricane-like cyclones that have a greater extension and are strongly influenced by the interaction between the atmosphere and the sea.
The new approach is based on: a) a procedure for “a priori” identification of meteorological structure of the events. With this procedure, it is possible to identify three homogeneous time series in each site. Each series can be studied separately because it can be considered independent of the others; b) the application of Power Extreme Value (PEV) distribution, a probabilistic model of the annual maxima of a marked Poisson process with marks distributed according to a stretched exponential distribution.
With reference to the maximum annual daily rainfall time series of Campania we identified the series of events with baroclinic cyclogenesis by removing isolated cells and hurricane-like cyclones events. The results obtained are only preliminary results because the study is in progress for checking it and testing the application to other areas of the Mediterranean regions
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