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On the breakup patterns of urban networks under load [article]

Marco Cogoni, Giovanni Busonera
2020 arXiv   pre-print
The urban networks of London and New York City are investigated as directed graphs within the paradigm of graph percolation. It has been recently observed that urban networks show a critical percolation transition when a fraction of edges are removed. The resulting strongly connected components form a cluster structure whose size distribution follows a power law with critical exponent τ. We start by analyzing how the networks react when subjected to increasingly widespread random edge removal
more » ... d the effect of spatial correlations with power-law decay. We observe a progressive decrease of τ as spatial correlations grow. A similar phenomenon happens when real traffic data (UBER) is used to delete congested graph edges: during low congestion periods τ is close to that obtained for uncorrelated percolation, while during rush hours the exponent becomes closer to the one obtained from spatially correlated edge removal. We show that spatial correlations seem to play an important role to model different traffic regimes. We finally present some preliminary evidence that, at criticality, the largest clusters display spatial predictability and that cluster configurations form a taxonomy with few main clades: only a finite number of breakup patterns, specific for each city, exists. This holds both for random percolation and real traffic, where the three largest clusters are well localized and spatially distinct. This consistent cluster organization is strongly influenced by local topographical structures such as rivers and bridges.
arXiv:2010.09320v1 fatcat:2yqhr52yinbujkboder47uaeya

Quality assessment for different haplotyping methods and GWAS sensitivity to phasing errors [article]

Giovanni Busonera, Marco Cogoni, Gianluigi Zanetti
2015 bioRxiv   pre-print
In this report we present a multimarker association tool (Flash) based on a novel algorithm to generate haplotypes from raw genotype data. It belongs to the entropy minimization class of methods and is composed of a two stage deterministic - heuristic part and of a optional stochastic optimization. This algorithm is able to scale up well to handle huge datasets with faster performance than the competing technologies such as BEAGLE and MACH while maintaining a comparable accuracy. A quality
more » ... sment of the results is carried out by comparing the switch error. Finally, the haplotypes are used to perform a haplotype-based Genome-wide Association Study (GWAS). The association results are compared with a multimarker and a single SNP association test performed with Plink. Our experiments confirm that the multimarker association test can be more powerful than the single SNP one as stated in the literature. Moreover, Flash and Plink show similar results for the multimarker association test but Flash speeds up the computation time of about an order of magnitude using 5 SNP size haplotypes.
doi:10.1101/015669 fatcat:cwedc2asx5hafdvvvhiwnf7a4m

On the stability of traffic breakup patterns in urban networks [article]

Marco Cogoni, Giovanni Busonera
2021 arXiv   pre-print
We investigate the behavior of extended urban traffic networks within the framework of percolation theory by using real and synthetic traffic data. Our main focus shifts from the statistical properties of the cluster size distribution studied recently, to the spatial analysis of the clusters at criticality and to the definition of a similarity measure between whole urban configurations. We discover that the breakup patterns of the complete network, formed by the connected functional road
more » ... s at criticality, show remarkable stability from one hour to the next, and predictability for different days at the same time. We prove this by showing how the average spatial distributions of the highest-rank clusters evolve over time, and by building a taxonomy of traffic states via dimensionality-reduction of the distance matrix, obtained via a clustering similarity score. Finally, we show that a simple random percolation model can approximate the breakup patterns of heavy real traffic when long-ranged spatial correlations are imposed.
arXiv:2103.14745v2 fatcat:romqz2pbczgq5gdqjzpldsmame

Critical phenomena in communication/computation networks with various topologies and suboptimal to optimal resource allocation

Marco Cogoni, Giovanni Busonera, Paolo Anedda, Gianluigi Zanetti
2015 Journal of Physics, Conference Series  
Optimal resources allocation for independent and joint test of it service releases V V Zimin, T V Kiseleva and E V Maslova -Dynamic Resource Allocation with the arcControlTower A Filipi, D Cameron and J K Nilsen -Understanding the detector behavior through Montecarlo and calibration studies in view of the SOX measurement A Caminata, M Agostini, K Altenmüller et al. -This content was downloaded from IP address 207.241.231.80 on 22/07 Abstract. We generalize previous studies on critical phenomena
more » ... in communication networks [1, 2] by adding computational capabilities to the nodes. In our model, a set of tasks with random origin, destination and computational structure is distributed on a computational network, modeled as a graph. By varying the temperature of a Metropolis Montecarlo, we explore the global latency for an optimal to suboptimal resource assignment at a given time instant. By computing the two-point correlation function for the local overload, we study the behavior of the correlation distance (both for links and nodes) while approaching the congested phase: a transition from peaked to spread g(r) is seen above a critical (Montecarlo) temperature Tc. The average latency trend of the system is predicted by averaging over several network traffic realizations while maintaining a spatially detailed information for each node: a sharp decrease of performance is found over Tc independently of the workload. The globally optimized computational resource allocation and network routing defines a baseline for a future comparison of the transition behavior with respect to existing routing strategies [3, 4] for different network topologies.
doi:10.1088/1742-6596/574/1/012004 fatcat:uta6bmzc7rgtlmlg6tc4auvjgu

Transition to congestion in communication/computation networks: from ideal to realistic resource allocation via Montecarlo simulations [article]

Marco Cogoni, Giovanni Busonera, Paolo Anedda, Gianluigi Zanetti
2016 arXiv   pre-print
We generalize previous studies on critical phenomena in communication networks by adding computational capabilities to the nodes to better describe real-world situations such as cloud computing. A set of tasks with random origin and destination with a multi-tier computational structure is distributed on a network modeled as a graph. The execution time (or latency) of each task is statically computed and the sum is used as the energy in a Montecarlo simulation in which the temperature parameter
more » ... ontrols the resource allocation optimality. We study the transition to congestion by varying temperature and system load. A method to approximately recover the time-evolution of the system by interpolating the latency probability distributions is presented. This allows us to study the standard transition to the congested phase by varying the task production rate. We are able to reproduce the main known results on network congestion and to gain a deeper insight over the maximum theoretical performance of a system and its sensitivity to routing and load balancing errors.
arXiv:1412.4071v2 fatcat:l7aypjwwbnhllk3tbdnmcfvkm4

Ultrametricity of optimal transport substates for multiple interacting paths over a square lattice network

Marco Cogoni, Giovanni Busonera, Gianluigi Zanetti
2017 Physical review. E  
We model a set of point-to-point transports on a network as a system of polydisperse interacting self-avoiding walks (SAWs) over a finite square lattice. The ends of each SAW may be located both at random, uniformly distributed, positions or with one end fixed at a lattice corner. The total energy of the system is computed as the sum over all SAWs, which may represent either the time needed to complete the transport over the network, or the resources needed to build the networking
more » ... . We focus especially on the second aspect by assigning a concave cost function to each site to encourage path overlap. A Simulated Annealing optimization, based on a modified BFACF Montecarlo algorithm developed for polymers, is used to probe the complex conformational substates structure. We characterize the average cost gains (and path-length variation) for increasing polymer density with respect to a Dijkstra routing and find a non-monotonic behavior as previously found in random networks. We observe the expected phase transition when switching from a convex to a concave cost function (e.g., x^γ, where x represents the node overlap) and the emergence of ergodicity breaking, finally we show that the space of ground states for γ<1 is compatible with an ultrametric structure as seen in many complex systems such as some spin glasses.
doi:10.1103/physreve.95.030108 pmid:28415372 fatcat:s4r4zjwjljh67lkqzeocsg4weq

Prenatal Attachment Inventory: expanding the reliability and validity evidence using a sample of Italian women

Alessandra Busonera, Stefania Cataudella, Jessica Lampis, Marco Tommasi, Giulio Cesare Zavattini
2017 Journal of Reproductive and Infant Psychology  
Giovanni Fioriti Editore, Roma, pp. VII-XVI. ISBN: 978-88-98991-4-19. Zavattini G.C. (2015). Presentazione a L. Lorito e F. Di Maria Gruppoanalisi e teoria dell'attaccamento.  ...  ,Busonera A., Marino L., Zavattini G.C. (2016).From parental-foetal attachment to parent-infant relationship: a systematic review about prenatal protective and risk factors.  ... 
doi:10.1080/02646838.2017.1349896 pmid:29517386 fatcat:6wcb7h42ojfapfh6q4f54uvffi

A Pilot Study of the Relationship Between Pregnancy and Autoimmune Disease: Exploring the Mother's Psychological Process

Stefania Cataudella, Jessica Lampis, Mirian Agus, Fabiana Casula, Giovanni Monni
2019 Frontiers in Psychology  
., 2008); MAAS (Busonera et al., 2016); DAS (Gentili et al., 2002); PBI (Scinto et al., 1999); MSPSS (Prezza and Principato, 2002); DERS, (Giromini et al., 2012); CES-D (Fava, 1983); HCR-TS (Bova et al  ...  ., 2008; Busonera et al., 2017) This is designed to measure prenatal attachment according to Muller's (1993) definition.  ...  Maternal Antenatal Attachment Scale (MAAS; Condon, 1993; Busonera et al., 2016) This measure assesses Quality of attachment (constituted by 11 items) and Intensity of preoccupation (defined by 8 items  ... 
doi:10.3389/fpsyg.2019.01961 pmid:31555167 pmcid:PMC6722214 fatcat:pdfabo7mgzhchoemgcmgl6eyem

Treatment patterns of snti-TNF agents in Italy: an observational study

L. Punzi, M. Matucci Cerinic, F. Cantini, G. Bagnato, U. Fiocco, C. Ferri, S. Bombardieri
2011 Reumatismo  
LAVORO ORIGINALE zi, Padua); Reumatologia SS Giovanni e Paolo (Dr. Leardini, Venice); Unità Sempl.  ...  Reumatologia Policlinico GB Rossi (Professor Bambara, Verona); Riabilitazione Reumatologica Ospedale di Valeggio (Professor Adami, Valeggio sul Mincio); Centro Multidisciplinare di Day Surgery Ospedale Ex Busonera  ... 
doi:10.4081/reumatismo.2011.18 fatcat:f3g2cvmesfbbdc3ii2pqgul6pe

Session H: Palliative Care

2005 Annals of Oncology  
Ferrari,Salvatore Grisanti, Vito Amoroso, Francesca Valcamonico, Simona De Ponti, Lucia Vassalli, Giovanni Rangoni, Edda Simoncini, Patrizia Marpicati, Elisabetta Montini, Giovanni Marini U.O.  ...  PRELIMINARY RESULTS Grazia Artioli, Martina Mattiazzi, Malihe Shams, Maria Ornella Nicoletto IOV/IRCSS Ospedale Busonera Padova, Italy This study examines the knowledge, opinions, and predictors of interest  ... 
doi:10.1093/annonc/mdi948 fatcat:aqw6vihjfzdubc76mlifmf7l2m

Anno X numero 2-2013

Direttore Responsabile, Giuseppe Paolisso, A Cura Di, Vincenzo Canonico
unpublished
STUDIO PILOTA Daddario A., Tessari A., Bisiacchi P., Formilan M., Busonera F., Albanese P., Cester A.  ...  (San Giovanni Rotondo/FG, Padova) 144 EMODINAMICA DEL CIRCOLO SPLANCNICO E IPOTENSIONE POST-PRANDIALE DELL'ANZIANO.  ... 
fatcat:xdt5rugryrenrjyuw7xmg5en5a

A pilot study on couple relationships and cardiac disease: The role of alexithymia and attachment in the course of myocardial infarction

Michela Di Trani, Cinzia Di Monte, Alessia Renzi, Paul S. Greenman, Federica Barbieri, Francesco Dentale, Valérie Beaudoin, Luigi Solano
2020
The entire sample was recruited from the cardiology department of the San Giovanni Hospital in Rome.  ...  The Experiences in Close Relationships-Revised (ECR-R) (Busonera et al., 2014; Fraley et al., 2000) is a 36-item, self-report questionnaire used to assess romantic attachment dimensions.  ... 
doi:10.13133/2724-2943/16899 fatcat:6scurfdtmvdxvcilyeqbjxhxpy

Anno VI numero 10 ottobre 2009

Direttore Responsabile, Niccolò Marchionni, A Cura Di, Vincenzo Canonico
unpublished
Busonera, M. Formilan, A. Cester (Dolo, Noale, Mirano) POSTER CON DISCUSSIONE GIOVEDI' 3 DICEMBRE -LIMONAIA 14.00-15.00 GRUPPO A 1. INDICATORI DELLA QUALITA' ASSISTENZIALE IN RSA: DATI PRELIMINARI S.  ...  Pilotto (San Giovanni Rotondo) LE CURE INTERMEDIE: CRITERI DI ELEGGIBILITA' DEL PAZIENTE E MODELLO ASSISTENZIALE C. Pizzorni, A. Napolitano, L. Sampietro, E.  ... 
fatcat:wzpukcvcm5ekllmwyunauu3rdq

Current Awareness in Hematological Oncology

2005 Hematological Oncology  
Azienda Osped S Giovanni Battista. SC Ematol 2, Corso Bramante 88, lT-10126 Turin, Italy.  ...  Azienda Osped Univ Padova, Osped Busonera, Div Med Oncol, Via Gattamelata 64, IT-35100 Padua, Italy.  ... 
doi:10.1002/hon.731 fatcat:qtud2ukloracpmzqk6hc4qv5qa

Problematiche di fine vita: il ruolo della medicina interna ospedaliera

F. Zulian, M. Campanini, L. Lusiani, L. Magnani, G. Pinna, R. Nardi
2017 Italian Journal of Medicine  
Busonera</p><p class="titolo"><strong>Ruolo dell'infermiere nel comfort care del paziente a fine vita in Medicina Interna</strong><br />D. Simonazzi, M. Lince, S. Tanzi, G.  ...  Busonera, 2017 Licensee PAGEPress, Italy QUADERNI -Italian Journal of Medicine 2017; 5(4):85-92 -Nell'approccio al paziente terminale ricercare la Appropriatezza nella Fragilità.  ...  Pinelli, 3 Giovanni Carrieri, 4 Giorgio Cioni 4 RIASSUNTO In ambito internistico la problematica relativa alle fasi finali della vita è molto sentita.  ... 
doi:10.4081/itjm.q.2017.4 fatcat:ya7h2elb5ndarbvafmj6g75q3i
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