378 research outputs found
Some Reflections on Orality and Epic Poetry in Ancient Literary Criticism
No full textThe paper examines some relevant cases of the views of the orality which appear in ancient literary criticism. Starting from a reconsideration of the oral system in the broader communication context of the Hellenistic and Im- perial period, the analysis will underline the specific functions attributed to or- ality in extant works of literary criticism, with a special focus on the perspective followed by the author of the treatise On the Sublime. Indeed, from the survey it appears clear that the exploration of oral dimension becomes, on one hand, a lens for the study of the previous literary tradition, in particular of the Homeric poetry, and, on the other, a crucial experience in the rhetorical paideia of the fu- ture ruling classes
A matheuristic approach to preference aware air traffic flow management
No full textThe main objective of Air Traffic Flow Management (ATFM) is to assign 4D trajectories to flights to guarantee both safe operations and efficient use of airspace. In this talk, we present a new approach to ATFM that explicitly takes AUs routes’ preference into account. A set of relevant trajectories is extracted from air traffic data repositories, using data analytics to learn the preference of each flight for each trajectory. The information feeds an Integer Linear Programming (ILP) model where variables assign a trajectory and a ground delay to each flight. For real-size instances, the number of trajectories leads to prohibitively large models and we propose a heuristic that, at each iteration, solves the ILP model restricted to a suitable subset of variables determined through machine learning techniques. The randomized selection comes from a tree classifier that considers features related to candidate variables, as well as to current solution and search state, and is preliminarily trained on reduced size instances. Computational results, compared to a heuristic based on column generation, show the ability of the proposed method to effectively solve realistic instances and sensibly reduce running times while preserving the quality of the solutions.
[1] Estes, A.S, Ball, M.O.: Alternative Resource Allocation Mechanisms for the Collaborative Trajectory Options Program (CTOP). In Thirteenth USA/Europe AirTraffic Management Research and Development Seminar, 1-9, (2019)
[2] Lancia, C., De Giovanni, L., Lulli, G.: Data analytics for trajectory selection and preference-model extrapolation in the European airspace. In: The OR2018 Proceedings. Springer, 7 p., (2018
Raimundi Lulli Opera latina (168-177). Turnhout
No full textLlinarès A. Raimundi Lulli Opera latina (168-177). Turnhout. In: Bulletin Hispanique, tome 80, n°1-2, 1978. p. 142
"Un'altra strada per l'epos: l'opera di Dionisio il Ciclografo e alcune sintesi mitografiche di età ellenistica e imperiale su papiro"
No full textThe article examines the evidences about Dionysios Kyklographos (FGrHist 15),
author of the Historical Cycle, and some cases of syntheses in prose, transmitted by
papyri of Hellenistic and Imperial age, which deal with mythical subject matters of the
traditional canonized literary genres, especially Homeric and cyclic epic poetry. The
papyri are examined from a palaeographical, bibliological and philological point of
view, in order to suggest some hypotheses on their readership
An Aggregate Stochastic Programming Model for Air Traffic Flow Management
No full textIn this paper, we present an aggregate mathematical model for air traffic flow management (ATFM), a
problem of great concern both in Europe and in the United States. The model extends previous
approaches by simultaneously taking into account three important issues: (i) the model explicitly incorporates
uncertainty in the airport capacities; (ii) it also considers the trade-off between airport arrivals
and departures, which is a crucial issue in any hub airport; and (iii) it takes into account the interactions
between different hubs.
The level of aggregation proposed for the mathematical model allows us to solve realistic size instances
with a commercial solver on a PC. Moreover it allows us to compute solutions which are perfectly consistent
with the Collaborative Decision-Making (CDM) procedure in ATFM, widely adopted in the USA and
which is currently receiving a lot of attention in Europe. In fact, the proposed model suggests the number
of flights that should be delayed, a decision that belongs to the ATFM Authority, rather than assigning
delays to individual aircraft
Raimundi Lulli, Opera latina edenda curavit F. Stegmüller. 213-280 : Opera Messanensia et Tuniciana.
No full textLlinarès A. Raimundi Lulli, Opera latina edenda curavit F. Stegmüller. 213-280 : Opera Messanensia et Tuniciana.. In: Bulletin Hispanique, tome 63, n°3-4, 1961. p. 290
- …
