Data-driven modeling of systemic delay propagation under severe meteorological conditions

The upsetting consequences of weather conditions are well known to any person involved in air transportation. Still the quantification of how these disturbances affect delay propagation and the effectiveness of managers and pilots interventions to prevent possible large-scale system failures needs further attention. In this work, we employ an agent-based data-driven model developed using real flight performance registers for the entire US airport network and focus on the events occurring on October 27 2010 in the United States. A major storm complex that was later called the 2010 Superstorm took place that day. Our model correctly reproduces the evolution of the delay-spreading dynamics. By considering different intervention measures, we can even improve the model predictions getting closer to the real delay data. Our model can thus be of help to managers as a tool to assess different intervention measures in order to diminish the impact of disruptive conditions in the air transport system.Comment: 9 pages, 5 figures. Tenth USA/Europe Air Traffic Management Research and Development Seminar (ATM2013

Measuring Qualities for OSGi Component-Based Applications

International audienceComponent-based software engineering (CBSE) begins to reach a certain level of maturity. Indeed, for the development of complex applications the use of component paradigm has become common. Therefore, the evaluation of the quality of these applications becomes necessary. In this context, the use of metrics is considered very important. Several metrics specific to component-based applications have been proposed. However, any of these metrics gained the consensus of the CBSE community and mainly there is no proposed tool to support them. As a large part of frameworks for component-based application development is based on object-oriented technology, we propose to use some object-oriented (OO) metrics to evaluate component-based applications produced with this kind of framework. Indeed, these metrics became a standard in OO community. So, they are well-defined, well-known and empirically validated. To identify which object-oriented metrics are useful for the evaluation of component-based applications, we have conducted an experimental study on 10 OSGi applications. This study also gives us the opportunity to discuss on the respect by OSGi developers of some properties pointed out by the literatur

Data-driven modeling of systemic delay propagation under severe meteorological conditions

Trabajo presentado en el 10th USA/Europe Air Traffic Management Research and Development Seminar (2013), celebrado en Chicago del 10 al 13 de junio de 2013.The upsetting consequences of weather conditions are well known to any person involved in air transportation. Still the quantification of how these disturbances affect delay propagation and the effectiveness of managers and pilots interventions to prevent possible large- scale system failures needs further attention. In this work, we employ an agent-based data-driven model developed using real flight performance registers for the entire US airport network and focus on the events occurring on October 27 2010 in the United States. A major storm complex that was later called the 2010 Superstorm took place that day. Our model correctly reproduces the evolution of the delay-spreading dynamics. By considering different intervention measures, we can even improve the model predictions getting closer to the real delay data. Our model can thus be of help to managers as a tool to assess different intervention measures in order to diminish the impact of disruptive conditions in the air transport system.PF receives support from the network Complex World within the WPE of SESAR (Eurocontrol and EU Commission). JJR acknowledges funding from the Ramón y Cajal program of the Spanish Ministry of Economy (MINECO). Partial support from MINECO and FEDER was received through projects MODASS (FIS2011-24785), FISICOS (FIS2007-60327) and INTENSE@COSYP (FIS2012-30634). Funding was also received from the EU Commission through projects EUNOIA FP7-DG.Connect-318367) and LASAGNE (FP7-ICT-318132).Peer reviewe

Systemic propagation of delays in the air-transportation network

Tesis doctoral presentada por Pablo Fleurquin para optar al título de Doctor, en el Programa de Física del Departamento de Física de la Universitat de les Illes Balears, realizada en el IFISC bajo la dirección de José Javier Ramasco Sukia, Víctor Martinez Eguíluz y como ponente Maxi San Miguel Ruibal.[EN] The focus of this dissertation is to quantitative describe, analyze and model a paradigmatic socio-technical complex system such as the air-transportation system. The generation, propagation and eventual amplification of flight de- lays involve a large number of interacting mechanisms. Such mechanisms can be classified as internal or external to the air tra c system. The basic internal mechanisms include aircraft rotations (the di erent flight legs that comprise an aircraft itinerary), airport operations, passengers’ connections and crew rotation. In addition, external factors, such as weather perturbations or security threats, disturb the system performance and contribute to a high level of system-wide congestion. Although this socio-technical system is driven by human decisions, the intricacy of the interactions between all these elements calls for an analy- sis of flight delays under the scope of Complex Systems theory. Complexity is concerned with the emergence of collective behavior from the microscopic interaction of the system elements. Several tools have been developed to tackle complexity. Here we use Complex Networks theory and take a system-wide perspective to broaden the understanding of delay propagation.Peer reviewe

Measuring Qualities for OSGi Component-Based Applications

International audienceComponent-based software engineering (CBSE) begins to reach a certain level of maturity. Indeed, for the development of complex applications the use of component paradigm has become common. Therefore, the evaluation of the quality of these applications becomes necessary. In this context, the use of metrics is considered very important. Several metrics specific to component-based applications have been proposed. However, any of these metrics gained the consensus of the CBSE community and mainly there is no proposed tool to support them. As a large part of frameworks for component-based application development is based on object-oriented technology, we propose to use some object-oriented (OO) metrics to evaluate component-based applications produced with this kind of framework. Indeed, these metrics became a standard in OO community. So, they are well-defined, well-known and empirically validated. To identify which object-oriented metrics are useful for the evaluation of component-based applications, we have conducted an experimental study on 10 OSGi applications. This study also gives us the opportunity to discuss on the respect by OSGi developers of some properties pointed out by the literatur

Preserving architectural choices throughout the component-based software development process

Abstrac