The Experts below are selected from a list of 110760 Experts worldwide ranked by ideXlab platform
Aldo Campi - One of the best experts on this subject based on the ideXlab platform.
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Application scenarios for cognitive Transport Service in next-generation networks
IEEE Communications Magazine, 2012Co-Authors: Franco Callegati, Walter Cerroni, Aldo CampiAbstract:This article describes the impact of a cognitive Transport and resource management paradigm on the convergence of application and network Services in next-generation networks. This is achieved by a new Transport Service layer implementing the functions needed by applications to automatically negotiate the network Transport Services. A testbed built on widely available technologies is described, presenting and discussing experiments that demonstrate the feasibility and advantages of a network infrastructure equipped with the proposed Transport Service layer. Two case studies are considered here with reference to the scenario of a user wishing to access a video Service. The former is a traditional videoon- demand Service, based on dynamic bandwidth allocation; the latter considers a "cloud-based" video-on-demand Service, in which the video content is dynamically moved where user location and resource availability require.
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Automated Transport Service management in the future Internet: concepts and operations
Journal of Internet Services and Applications, 2011Co-Authors: Franco Callegati, Aldo Campi, Walter CerroniAbstract:This paper describes a possible approach to provide advanced communication Services for the Future Internet in an automated way. This is achieved by introducing a new Cognitive Transport Service layer on top of the traditional Transport layer, which is used by the network to automatically negotiate the required Transport Service with the applications. Experimental validation of the proposed solution is discussed with the help of two case studies: bandwidth reservation on a secure channel and dynamic bandwidth negotiation for variable-quality video streaming.
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Transport Service for the Future Internet: Concepts and operations
2010 IEEE Globecom Workshops, 2010Co-Authors: Franco Callegati, Aldo Campi, Walter CerroniAbstract:This paper describes a possible approach to provide application-oriented functions and Service definition capabilities in the Future Internet. This is achieved by introducing a Transport Service layer on top of the Transport layer, that is used by the network to automatically negotiate with the applications the Transport Service they require. Experimental validation of the proposed solution is discussed.
Walter Cerroni - One of the best experts on this subject based on the ideXlab platform.
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Application scenarios for cognitive Transport Service in next-generation networks
IEEE Communications Magazine, 2012Co-Authors: Franco Callegati, Walter Cerroni, Aldo CampiAbstract:This article describes the impact of a cognitive Transport and resource management paradigm on the convergence of application and network Services in next-generation networks. This is achieved by a new Transport Service layer implementing the functions needed by applications to automatically negotiate the network Transport Services. A testbed built on widely available technologies is described, presenting and discussing experiments that demonstrate the feasibility and advantages of a network infrastructure equipped with the proposed Transport Service layer. Two case studies are considered here with reference to the scenario of a user wishing to access a video Service. The former is a traditional videoon- demand Service, based on dynamic bandwidth allocation; the latter considers a "cloud-based" video-on-demand Service, in which the video content is dynamically moved where user location and resource availability require.
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Automated Transport Service management in the future Internet: concepts and operations
Journal of Internet Services and Applications, 2011Co-Authors: Franco Callegati, Aldo Campi, Walter CerroniAbstract:This paper describes a possible approach to provide advanced communication Services for the Future Internet in an automated way. This is achieved by introducing a new Cognitive Transport Service layer on top of the traditional Transport layer, which is used by the network to automatically negotiate the required Transport Service with the applications. Experimental validation of the proposed solution is discussed with the help of two case studies: bandwidth reservation on a secure channel and dynamic bandwidth negotiation for variable-quality video streaming.
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Transport Service for the Future Internet: Concepts and operations
2010 IEEE Globecom Workshops, 2010Co-Authors: Franco Callegati, Aldo Campi, Walter CerroniAbstract:This paper describes a possible approach to provide application-oriented functions and Service definition capabilities in the Future Internet. This is achieved by introducing a Transport Service layer on top of the Transport layer, that is used by the network to automatically negotiate with the applications the Transport Service they require. Experimental validation of the proposed solution is discussed.
Franco Callegati - One of the best experts on this subject based on the ideXlab platform.
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Application scenarios for cognitive Transport Service in next-generation networks
IEEE Communications Magazine, 2012Co-Authors: Franco Callegati, Walter Cerroni, Aldo CampiAbstract:This article describes the impact of a cognitive Transport and resource management paradigm on the convergence of application and network Services in next-generation networks. This is achieved by a new Transport Service layer implementing the functions needed by applications to automatically negotiate the network Transport Services. A testbed built on widely available technologies is described, presenting and discussing experiments that demonstrate the feasibility and advantages of a network infrastructure equipped with the proposed Transport Service layer. Two case studies are considered here with reference to the scenario of a user wishing to access a video Service. The former is a traditional videoon- demand Service, based on dynamic bandwidth allocation; the latter considers a "cloud-based" video-on-demand Service, in which the video content is dynamically moved where user location and resource availability require.
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Automated Transport Service management in the future Internet: concepts and operations
Journal of Internet Services and Applications, 2011Co-Authors: Franco Callegati, Aldo Campi, Walter CerroniAbstract:This paper describes a possible approach to provide advanced communication Services for the Future Internet in an automated way. This is achieved by introducing a new Cognitive Transport Service layer on top of the traditional Transport layer, which is used by the network to automatically negotiate the required Transport Service with the applications. Experimental validation of the proposed solution is discussed with the help of two case studies: bandwidth reservation on a secure channel and dynamic bandwidth negotiation for variable-quality video streaming.
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Transport Service for the Future Internet: Concepts and operations
2010 IEEE Globecom Workshops, 2010Co-Authors: Franco Callegati, Aldo Campi, Walter CerroniAbstract:This paper describes a possible approach to provide application-oriented functions and Service definition capabilities in the Future Internet. This is achieved by introducing a Transport Service layer on top of the Transport layer, that is used by the network to automatically negotiate with the applications the Transport Service they require. Experimental validation of the proposed solution is discussed.
Pedro Gazmuri - One of the best experts on this subject based on the ideXlab platform.
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a stochastic model for bus injection in an unscheduled public Transport Service
Transportation Research Part C-emerging Technologies, 2019Co-Authors: Diego Morales, Juan Carlos Munoz, Pedro GazmuriAbstract:Abstract Randomness affecting the operation of public Transport systems generates significant increments in waiting times. A strategy to deal with this randomness is bus injection, in which buses are kept in specific points along the route ready to be dispatched when an event such as an extremely long headway occurs. In this work, a stochastic model based on the second moment of the headways distribution is developed to determine if one or more buses are worth reserving for injection in a public Transport Service. A single stop approach is initially used to determine an expression for the optimal headway threshold triggering the injection. Then, a model for the complete Service is developed and used to determine when the empty bus should be injected within the headway once the decision to inject it has been taken. We show that the bus should be injected approximately when 57% of the headway has passed. Simulations with real data are used to test the proposed model, proving its accuracy in terms of measuring the impact on waiting times. The results show that reserving a bus to be injected can be better than operating the entire fleet continuously.
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a stochastic model for bus injection in a public Transport Service
Transportation research procedia, 2019Co-Authors: Diego Morales, Juan Carlos Munoz, Pedro GazmuriAbstract:Abstract Randomness affecting the operation of public Transport systems generates significant increments in waiting times. A strategy to deal with this randomness is bus injection, in which buses are kept in specific points along the route ready to be dispatched when an event such as an extremely long headway occurs. In this work, a stochastic model based on the second moment of the headways distribution is developed to determine if one or more buses are worth reserving for injection in a public Transport Service. A single stop approach is initially used to determine an expression for the optimal headway threshold triggering the injection. Then, a model for the complete Service is developed and used to determine when the empty bus should be injected within the headway once the decision to inject it has been taken. We show that the bus should be injected approximately when 57% of the headway has passed. Simulations with real data are used to test the proposed model, proving its accuracy in terms of measuring the impact on waiting times. The results show that reserving a bus to be injected can be better than operating the entire fleet continuously.
Simona Bolis - One of the best experts on this subject based on the ideXlab platform.
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monetary values of Transport Service attributes land versus maritime ro ro Transport an application using adaptive stated preferences
Maritime Policy & Management, 2008Co-Authors: Angela Stefania Bergantino, Simona BolisAbstract:The objective of this work is that of illustrating a methodology to derive, in terms of trade-offs, the relative values of Transport Service attributes for logistics operators. In particular, the analysis yields insights on the preferences for time-savings, frequency and reliability of the Transport Service in terms of price, of a sample of freight forwarders located in the South of Italy. The data is gathered using an Adaptive Stated Preference application and the estimates are obtained through a Tobit ML estimator on both company specific data and pooled data. The results show that frequency is the most highly rated characteristic of the Service together with reliability. The value of time is significantly lower in both cases. The outcome is consistent across estimations and, substantially in line with the outcome of previous studies carried out on operators active at different levels of the Transport-logistic chain. Until now, in fact, studies have been carried out uniquely on carriers or producers. The selection of freight forwarders allows to shed light on a segment of the market that accounts for more than half of the Transport-related decisions. Furthermore, the present study focuses on a comparison between all land Transport and maritime ro-ro alternatives, in line with the growing interest on the integration among Transport modes. The output signals both the absence of any a priori preclusion for ro-ro maritime Services and the extremely important role that frequency of Service assumes for the development and the establishment of maritime Services as realistic alternatives to all land Transport.
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an analysis of maritime ro ro freight Transport Service attributes through adaptive stated preference an application to a sample of freight forwarders
European Transport \ Trasporti Europei, 2004Co-Authors: Angela Stefania Bergantino, Simona BolisAbstract:In this paper we present preliminary evidence from a pilot study carried out with the primary objective of testing the validity of adaptive conjoint data collecting methods in analysing operators’ preferences when redirecting current on-land Transport Services to a hypothetical maritime ro-ro Service alternative. The analysis has focussed on a sample of freight forwarders. Through a combination of Revealed Preferences and Adaptive Stated Preference Experiments we have constructed a database of their preferences toward the maritime ro-ro alternative using a set of Transport Service attributes: price, reliability, frequency, transit time, etc. We have estimated the relevant parameters through a Tobit model and have been able to calculate relative trade-off values among the significant attributes. The resulting ranking highlights the relative importance of reliability and frequency in the decision to switch to maritime Services.
