Dynamic bandwidth management as part of an integrated network management system based on distributed agents

We present a system for dynamic network resource configuration in environments with bandwidth reservation and path restoration mechanisms. Our focus is on the dynamic bandwidth management results, although the main goal of the system is the integration of the different mechanisms that manage the reserved paths (bandwidth, restoration, and spare capacity planning). The objective is to avoid conflicts between these mechanisms. The system is able to dynamically manage a logical network such as a virtual path network in ATM or a label switch path network in MPLS. This system has been designed to be modular in the sense that in can be activated or deactivated, and it can be applied only in a sub-network. The system design and implementation is based on a multi-agent system (MAS). We also included details of its architecture and implementation

Constraint satisfaction techniques under uncertain conditions for fault diagnosis in nonlinear dynamic systems

The speed of fault isolation is crucial for the design and reconfiguration of fault tolerant control (FTC). In this paper the fault isolation problem is stated as a constraint satisfaction problem (CSP) and solved using constraint propagation techniques. The proposed method is based on constraint satisfaction techniques and uncertainty space refining of interval parameters. In comparison with other approaches based on adaptive observers, the major advantage of the presented method is that the isolation speed is fast even taking into account uncertainty in parameters, measurements and model errors and without the monotonicity assumption. In order to illustrate the proposed approach, a case study of a nonlinear dynamic system is presented

Fault diagnosis by refining the parameter uncertainty space of nonlinear dynamic systems

This paper deals with fault detection and isolation problems for nonlinear dynamic systems. Both problems are stated as constraint satisfaction problems (CSP) and solved using consistency techniques. The main contribution is the isolation method based on consistency techniques and uncertainty space refining of interval parameters. The major advantage of this method is that the isolation speed is fast even taking into account uncertainty in parameters, measurements, and model errors. Interval calculations bring independence from the assumption of monotony considered by several approaches for fault isolation which are based on observers. An application to a well known alcoholic fermentation process model is presented

Dissolution of Dynamic Electronic Institutions, a first approach: Relevant factors and causes

In the context of the digital business ecosystems, small organizations cooperate between them in order to achieve common goals or offer new services for expanding their markets. There are different approaches for these cooperation models such as virtual enterprises, virtual organizations or dynamic electronic institutions which in their lifecycle have in common a dissolution phase. However this phase has not been studied deeply in the current literature and it lacks formalization. In this paper a first approach for achieving and managing the dissolution phase is proposed, as well as a CBR process in order to support it in a multi-agent system

Session outline and learning outcomes - bed mobility

This resource is for Health Scientists

Dynamic Document Generation from Semantic Web Data

This talk will present an overview of the ongoing ERCIM project SMARTDOCS (SeMAntically-cReaTed DOCuments) which aims at automatically generating webpages from RDF data. It will particularly focus on the current issues and the investigated solutions in the different modules of the project, which are related to document planning, natural language generation and multimedia perspectives. The second part of the talk will be dedicated to the KODA annotation system, which is a knowledge-base-agnostic annotator designed to provide the RDF annotations required in the document generation process.

Recognition of static and dynamic facial expressions: Influences of sex, type and intensity of emotion

Ecological validity of static and intense facial expressions in emotional recognition has been questioned. Recent studies have recommended the use of facial stimuli more compatible to the natural conditions of social interaction, which involves motion and variations in emotional intensity. In this study, we compared the recognition of static and dynamic facial expressions of happiness, fear, anger and sadness, presented in four emotional intensities (25 %, 50 %, 75 % and 100 %). Twenty volunteers (9 women and 11 men), aged between 19 and 31 years, took part in the study. The experiment consisted of two sessions in which participants had to identify the emotion of static (photographs) and dynamic (videos) displays of facial expressions on the computer screen. The mean accuracy was submitted to an Anova for repeated measures of model: 2 sexes x [2 conditions x 4 expressions x 4 intensities]. We observed an advantage for the recognition of dynamic expressions of happiness and fear compared to the static stimuli (p < .05). Analysis of interactions showed that expressions with intensity of 25 % were better recognized in the dynamic condition (p < .05). The addition of motion contributes to improve recognition especially in male participants (p < .05). We concluded that the effect of the motion varies as a function of the type of emotion, intensity of the expression and sex of the participant. These results support the hypothesis that dynamic stimuli have more ecological validity and are more appropriate to the research with emotions.

Spatial Inequalities and Social Utility: Mobility Efforts and Accessibility in Greater Santiago

Emergent phenomena such as urban sprawl, travel intensification and loss of cohesion in contemporary metropolises, impose stronger constraints on its inhabitants. Among them, travel and location capabilities become a fundamental factor of social integration and a multiplier of income inequalities. The simultaneous analysis of housing-travel efforts and accessibility to urban opportunities in Greater Santiago shows that these dimensions are closely related and exert an important influence on spatial mobility and inequalities among its inhabitants. Furthermore, a theoretical model of displacements, considering income and location, confirms the importance of proximity and non-motorized transport in order to optimize daily mobility strategies of households. Overall, the empirical and theoretical results presented show the need to implement coordinated planning strategies between the housing and transport sectors, addressing not only travel acceleration, but mainly the consistency between accommodation and opportu  ties location. The creation of such planning tools could be a more sustainable alternative than current growth trends in Greater Santiago.

Resources for an Intersectorial Management of Public Policies: Mobility and Access

The objective of this paper is to integrate mobility as across component of the management of specific public actions. The case of study concerns the public health services in Argentina, and mother’s mobility conditions in the suburban of the Buenos Aires Metropolitan Area. In terms of methodology, the paper working on the concept of access trying to identify, measure and evaluate the relationship between mobility conditions and maternal health care. Access is weighted according to the realization of health services, and not according to the arrival at the places where they are offers. The result is innovative empirical evidence, useful as an indicator to make more relevant the role of mobility within the public agenda of transport and others specific sectors, asa basic social right behind the access that requires coordinated actions and cross-sectoral approaches.

Entropic system of daily mobility in a Metropolitan Area of Bogota, Colombia.

The fundamental diseconomy in the large metropolitan areas is the significant and sustained increase in travel time incurred by its inhabitants daily. Since a portion of the energy consumed in the daily mobility does not necessarily translate into individual and collective wealth, entropic systems have a feature which, as discussed for the case of Bogotá, does not have metropolitan institutions with the ability to redirect.

Residential Mobility: a Sociological Concern

The aim of this paper is to present a theoretical-conceptual approach to residential mobility, in general, and residential trajectories, in particular. It seeks to understand how from the unequal distribution and appropriation of social resources —both material and symbolic— different trajectories are developed and how socio-territorial structures constrain, shape and enable interactions between families, their members and the various contexts of action towards meeting their housing needs. From sociological contributions of different traditions, we present a scheme that pays attention to articulating the relationship between structural factors, position in social structure and decisions elating to changes of residence. We conclude that mobility patterns are relational patterns that are defined in dialogue with the opportunities and limitations that are set up around the housing stock and new or vacant land, the land market dynamics and housing, the labor market, the provision of nfrastructure services and social facilities, etc.

El sistema de transporte de carga en la Ciudad de México Factores a considerar en el análisis del transporte de carga y la movilidad de mercancías

El artículo presenta un análisis del sistema de transporte de carga en la Ciudad de México desde el punto de vista sistémico, considerando las variables económicas, políticas, técnicas, sociales que permitan comprender la problemática que actualmente enfrenta esta ciudad en la movilidad de mercancías. Es una reflexión de carácter multidisciplinario basada en el método cualitativo para explicar y comprender la situación actual del transporte de carga en México dentro del contexto de la globalización económica, para identificar así la naturaleza profunda de la estructura dinámica del transporte de carga en la Ciudad y la nueva forma de conceptualizar al transporte de mercancías. Se estudia el comportamiento de los flujos e infraestructura de las redes viales, las características urbanas, los instrumentos jurídicos en las políticas del transporte, la problemática del transporte de carga, así como la movilidad y los diferentes problemas que enfrenta el sector en relación con la ciudad. El objetivo principal de presente artículo es enunciar las razones por las que no existe un sistema de transporte articulado y se privilegia el uso del autotransporte de carga. Finalmente, de acuerdo a las diversas variables analizadas, se establece en las conclusiones que el análisis y la planificación de los transportes debe ser multi e interdisciplinario por naturaleza, con una visión integral para establecer un equilibrio entre los modos de transporte. 

Soft budget constraints in a dynamic general equilibrium model

This paper considers an overlapping generations model in which capital investment is financed in a credit market with adverse selection. Lenders’ inability to commit ex-ante not to bailout ex-post, together with a wealthy position of entrepreneurs gives rise to the soft budget constraint syndrome, i.e. the absence of liquidation of poor performing firms on a regular basis. This problem arises endogenously as a result of the interaction between the economic behavior of agents, without relying on political economy explanations. We found the problem more binding along the business cycle, providing an explanation to creditors leniency during booms in some LatinAmerican countries in the late seventies and early nineties.

Dynamic conditional correlation in Latin-American asset markets

In this paper we reviewed the models of volatility for a group of five Latin American countries, mainly motivated by the recent periods of financial turbulence. Our results based on high frequency data suggest that Dynamic multivariate models are more powerful to study the volatilities of asset returns than Constant Conditional Correlation models. For the group of countries included, we identified that domestic volatilities of asset markets have been increasing; but the co-volatility of the region is still moderate.

Dynamic programming for stochastic target problems, Viscosity solutions and hedging in markets with Portfolio constraints and large investors

The purpose of this expository arti le is to present a self- ontained overview of some results on the hara terization of the optimal value fun tion of a sto hasti target problem as (dis ontinuous) vis osity solution of a ertain dynami programming PDE and its appli ation to the problem of hedging ontingent laims in the presen e of portfolio onstraints and large investors