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L'intertestualità nell'opera di Seamus Heaney: l'incontro con i classici greci e latini.
No full textRobot Teams for Multi-Objective Tasks
No full textArtificial Intelligence research has developed, during the last fifty years, a large variety
of tools aimed at establishing rational behaviors for cognitive entities, called
agents. This dissertation addresses the problem of producing rational behaviors for
a team of agents pursuing possibly different objectives. The problem can be decomposed
into the following two research issues: i) multi-agent behavior and execution
modelling, and, ii) multi-objective problem solving. Our resarch focus on multi-agent
systems has been modelling distributed execution of asynchronous plans composed
of actions of uncertain duration, possibly coordinated through direct communication.
The distributed execution and the communication costs require to model the dynamics
of knowledge when asynchronously distributed in the system under the effect of
local and communication actions. The second research focus of this thesis, has been
multi-objective problem solving. The introduction of multiple objectives in planning
domains, allows us to generalize classical multi-agent planning, thus augmenting the
class of solvable problems. Multi-objective formulations allow an incomplete, and
possibly contradictory, description of goals, and are frequent in many practical applications.
For example, consider the case where requests to a system come from a
large community of users or from the members of a research group studying different
aspects of a complex problem.
This thesis provides three main contributions. The first contribution consists of
two formal tools for modelling multi-agent systems. One, for planning, and, one, for
distributed execution. Each model defines a class of languages based on single-agent
action languages and Petri nets, respectively. The second contribution addresses two
multi-objective issues: solution concept and solving techniques. First, we define a
novel solution concept which is, to our knowledge, the first refinement of Pareto optimality
for any multi-objective problem. Second, we provide a sound and complete
algorithm for solving it. Finally, the third contribution is a case study on the Urban
Search And Rescue (USAR) robotic problem, presented in three formulations of increasing
complexity. USAR, in its classical formulation, is a multi-objective problem
where the objectives are: exploration, mapping, and victim detection
SITE CHARACTERIZATION OF ITALIAN RECORDING STATIONS FOR NEW GROUND MOTION PREDICTIONS
No full textFrancesco Silvestri, Federica Cotecchia, Cristina Jomm
Sotto la protezione del Marchio. Storia, Critica e Progetto dell'Interno Commerciale
No full textNella tesi di dottorato viene studiato lo spazio commerciale in quanto luogo preferenziale di sperimentazione e ricerca architettonica. La ricerca, di vasto respiro, ha cercato di analizzare lo spazio commerciale da molti punti di vista per individuare le ragioni di alcuni fenomeni propri a questa tipologia di spazi. Particolare attenzione è stata posta sul ruolo della comunicazione e dell’aspetto iconico e simbolico delle parti disegnate e non che compongono e qualificano gli spazi del commercio, oltre che dell’analisi storico/critica degli stessi. Il risultato della ricerca è stato il tentativo di indicare una possibile via di sviluppo per questo tipo si spazi proponendo un luogo che, nel rispetto delle tendenze e delle nuove sperimentazioni, possa diventare interattiv
PERCORSI DEL DISTURBO BIPOLARE: DAL RISCHIO ALLA CLINICA IN ETA' EVOLUTIVA
No full textTHIS ITEM PRESENT A MULTISITE LONGITUDINAL STUDY AIMED AT ASSESSING THE DEGREE OF FAMILIARITY FOR BD IN A CLINICAL SAMPLE (AGE 9-14) REFERRED FOR EXTERNALIZING/INTERNALIZING SYMPTOMS WITHOUT A SYNDROMAL PRESENTATION. WE OBTAINED AN "AT RISK" SAMPLE THAT RECEIVED A FOLLOW UP ASSESSMENT 12-18 MONTHS AFTER FIRST EVALUATION. PRELYMINARY RESULTS CONFIRM THE HIGH DEGREE OF FAMILIARITY FOR MD IN A COMMUNITY CLINICALLY REFERRED SAMPLE OF YOUTHS.DISCUSSION IS FOCUSED ON THE POTENTIAL ROLE OF ANXIETY AS AN EARLY MARKER OF BD ONSET
HARMONIC CURRENT SIDEBAND INDICATORS (HCSBIs) FOR BROKEN BAR DETECTION AND DIAGNOSTICS IN CAGE INDUCTION MOTORS
No full textInduction motor bar breakages have been increasingly studied in the last decades because of
economic interests in developing techniques that permit on-line, non-invasive, early detection
of motor faults in power plants. This work is specifically focused on
broken bar detection and fault severity assessment in three phase power cage motors fed by
non-sinusoidal voltage sources. In this work some new fault indicators for rotor bar breakages detection in squirrel cage
induction motors are proposed, mathematically developed and
experimentally proved.
They are based on the sidebands of phase current upper harmonics, and they are well suited
especially for converter-fed induction motors. The ratios I(7-2s)f/I5f and I(5+2s)f/I7f , I(13-2s)f/I11f and
I(11+2s)f/I13f are examples of such new indicators, and they are not dependent on load torque
and drive inertia, as classical indicators do. Their frequency-dependence has been also examined both theoretically and experimentally, and it was found less remarkable with respect to
other indicators. Moreover, their values increase linearly with the quantity of consecutive
broken bars, almost for not too much advanced faults; on 4-poles motors they were
found quietly like the per-unit number of broken bars (ratio on total bar number).
An original formulation is presented for motor mathematical modeling, based on the
Generalized Symmetrical Components Theory, for sidebands amplitude computation. A complete motor model (involving all the elementary machine
electrical circuits, as stator belts and rotor mesh loops) has been used for computer simulations; the same model was then transformed by using some complex Fortescue’s matrices to
obtain a steady-state linear solution, solvable for stator and rotor currents, in healthy and faulty
conditions. By exploiting the model, the formal definition of a set of new broken bar
indicators was finally obtained. Machine simulations carried out by running the
complete numerical model confirmed the accuracy of the model, and the theoretical previsions.
Experimental work was performed by using a square-wave inverter-fed motor with an
appositely prepared cage, for easy testing with increasing number of
broken bars and without motor dismounting. Moreover, extensive experimentation was carried out on three industrial motors with different power and poles number, with
increasing load, frequency and fault gravity for methodology validation.
Finally, the ideas exposed in this work led to a patent application, owned by the University of Rome “Sapienza”.Ministry of Defense, General Direction of Naval Armaments (NAVARM
EFFETTO DELL'INFIAMMAZIONE E DEGLI ACIDI BILIARI SULLE FIBROCELLULE MUSCOLARI, CON PARTICOLARE RIFERIMENTO ALLE VIE BILIARI ED ALL'INTESTINO
No full textMARIO ANGELICO, PAOLO ONOR
I TERRITORI DEBOLI. Il contributo dei sistemi locali marginali per uno sviluppo equilibrato del territorio europeo nell'epoca della competitività
No full textCarlo Donolo, Roberto Mascarucci, Francesca Morac
Tra esperienza linguistica e testimonianza poetica. Il romanzo lirico degli anni Venti del Novecento nelle letterature serba, croata e bosniaca
No full textDopo aver analizzato il rapporto tra forme narrative brevi e lunghe e tra queste e il lirico, ci si concentra sul romanzo lirico come fenomeno rilevante nelle letterature slave meridionali negli anni '20 del '900. Particolare attenzione è dedicata all'analisi dei primi romanzi di M. Crnjanski, R. Petrovic e H. Humo