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  1. F. Ciravegna; Alberto Lavelli; G. Satta,
    Full Parsing Approximation, Finite-State Cascades and Grammar Organization for Information Extraction,
    This paper proposes an approach to full parsing approximation suitable for Information Extraction from texts. Sequences of cascades of finite-state rules deterministically analyze the text, building unambiguous structures. Initially basic chunks are analyzed; then clauses are recognized and nested; finally modifier attachment is performed and the global parse tree is built. The approach has been extensively proven to work mainly for Italian, but it was also tested for English and Russian. A parser based on such approach has been implemented as part of Pinocchio, an environment for developing and running IE applications,
  2. Paolo Tonella; G. Antoniol,
    Design Pattern Inference for Object Oriented Systems,
    When designing a new application , experienced software engineers usually try to employ solutions that proved successful in previous projects. Such reuse of code organizations is seldom made explicit. Nevertheless it represents important information about the system, that can be extremely valuable during program understanding, by documenting the design choices underlying the implementation. In this paper an approach is proposed for the inference of recurrent design patterns directly from the code. No assumption is made on the availability of any pattern library, and the concept analysis algorithm, adapted for this purpose, is able to infer the presence of class groups which instantiate a common, repeated pattern. This approach was applied to 3 C applications, for which the relations among classes led to the extraction of a set of design patterns, that could be interpreted as meaningful organizations aimed at solving general problems, with several instances in the code,
  3. Bruno Caprile,
    Uniformly Generating Distribution Functions for Discrete Random Variables,
    An algorithm is presented which efficiently solves the problem of uniformity generating distribution functions for an n-valued random variable,
  4. Marco Orlandi,
    Riconoscimento vocale su linea telefonica. Windows '95. Gestione di diversi dialoghi,
    La presente documentazione è relativa al sistema multi-dialogo per linea telefonica sviluppato in ambiente Windows'95 presso l'IRST. La differenza sostanziale rispetto al prototipo precedente è la gestione comtemporanea di più moduli di dialogo, inoltre il sistema usa la nuova libreria Spinet.lib per il riconoscimento. Rimangono inalterate le funzionalità generali del nuovo sistema, ne elenchiamo le principali: riconoscimento speaker indipendent della voce attraverso H.M.M.; sintesi asincrona di messaggi vocali attraverso il sintetizzatore dello C.S.E.L.T.; acquisizione del segnale vocale attraverso lo Start-End Point Detector (SEPD); semplice interfaccia grafica con diverse possibilità di debug; esecuzione delle tipiche operazioni di un centralino telefonico (call center),
  5. Georg Pucker; Viviana Mulloni; L. Pavesi; Pierluigi Bellutti; Alberto Lui; C. Spinella,
    Visible luminescence from a Si superlattice embedded in high quality Si/SiO2 optical microcavities,
    SiO2/Si microcavities were prepared using poly-Si layers, deposited by LPCVD technique and thermally grown SiO2 layers. A superlattice formed by 3 thin light emitting Si-layers (thickness <2nm) separated by SiO2 layers was embedded within the microcavity. Transmission Electron Microscopy, reflection and photoluminescence spectra were used to characterise the microcavities. Reflection measurements show a cavity resonance at 650 nm and at 830 nm, with a quality factor of 65. Comparison with the photoluminescence spectra of (Si/SiO2) superlattices indicates an enhancement of the luminescence intensity by a factor of 20, a narrowing of the emission line to 13 nm and a blueshift of the main spectral features,
  6. L. Pavesi; Z. Gaburro; Viviana Mulloni; C. Mazzoleni; R. Chierchia; Pierluigi Bellutti; Alberto Lui; F. Fuso; M. Labardi; L. Pardi; F. Sbrana; M. Allegrini; S. Trusso; C. Vasi; O. Bisi; S. Ossicini; E. Degoli; A. Diligenti; A. Nannini; G. Pennelli; F. Pieri,
    Development and characterisation of electroluminescent diodes based on porous Si Integration with the control electronics in CMOS technology,
    The demonstration of efficient and reliable light emitting diodes (LED) in a silicon based system will have a great impact on photonics. A first step to this goal is the demonstration of an efficient Si based LED for which porous silicon (PS) is a good candidate. State of the art PS based LED devices have external quantum efficiency of more than 1% even if the power efficiency is still in the order of 0.1% due to the very high turn-on voltage of these diodes, while integration of PS based LED with microelectronic circuit has been also demonstrated. In this project we propose a new device structure based on an heterojunction between crystalline Si and PS. The idea is based on the realisation that efficient hole injection exists. With our device structure we want to mimic this interface also for electron injection. This is obtained through an electrochemical anodization of a p-type silicon wafer where n+-type doped stripes are formed by implantation. Due to the etching selectivity of the PS formation process when performed in the dark, the n+-type doped stripes are not etched and, instead, are floating over the PS layer. The resulting structure is composed of an array of n+-type doped crystalline Si/PS junction. The fabrication of the test structure is within the CMOS fab-line of ITC-irst and it comprehends all standard processing but for the fabrication of the PS layer, which is an electrochemical attak, performed within the Department of Physics of Trento,
  7. D. Maniglio,
    Correlazione fra energia libera superficiale e caratteristiche di adesione batterica su biomateriali polimerici,
  8. J. Rosenfeld; Norbert Ligterink,
    A study of the phase transition in the transverse Ising model using the extended coupled-cluster method,
    The phase transition present in the linear-chain and square-lattice cases of the transverse Ising model is examinated. The extended coupled cluster method (ECCM) can describe both sides of the phase transition with a unified approach. The correlation length and excitation energy are determined. We demonstrate tha ability of the ECCM to use both the weak- and the strong-coupling starting state in a unified approach for the study of critical behavior,
  9. Marco Visentin; Cesare Furlanello,
    Modelli Predittivi per il Turismo. Risultati Conclusivi del progetto ITC-irst per il Servizio Statistica PAT,
  10. Cesare Furlanello; Stefano Merler; Lorenzo Potrich,
    GIS, DBMS e modelli predittivi per il monitoraggio e la pianificazione,