IP Flow Mobility in PMIPv6 Based Networks: Solution Design and Experimental Evaluation

The ability of offloading selected IP data traffic from 3G to WLAN access networks is considered a key feature in the upcoming 3GPP specifications, being the main goal to alleviate data congestion in cellular networks while delivering a positive user experience. Lately, the 3GPP has adopted solutions that enable mobility of IP-based wireless devices relocating mobility functions from the terminal to the network. To this end, the IETF has standardized Proxy Mobile IPv6 (PMIPv6), a protocol capable to hide often complex mobility procedures from the mobile devices. This paper, in line with the mentioned offload requirement, further extends PMIPv6 to support dynamic IP flow mobility management across access wireless networks according to operator policies. Considering energy consumption as a critical aspect for hand-held devices and smart-phones, we assess the feasibility of the proposed solution and provide an experimental analysis showing the cost (in terms of energy consumption) of simultaneous packet transmission/reception using multiple network interfaces. The end-to-end system design has been implemented and validated by means of an experimental network setup.European Community´s Seventh Framework ProgramPublicad

Una mirada desde el Consejo Nacional de Universidad de Nicaragua: Somos una sociedad meramente intercultural

En primer lugar quiero saludarles y decirles que para el Consejo Nacional de Universidades, CNU, la pertenencia de URACCAN le da una enorme fortaleza y sentido de Consejo Nacional. Es importante destacar que aún desde antes que la Ley General de Educación lo reconociera legalmente ya el CNU habíamos reconocido a las Universidades Comunitarias Interculturales. Después de un foro, antes de la ley en mención, ya habíamos acordado reconocerlas como tal y posteriormente se legalizó dicha condición

Agile Assessment Methods: Current State of the Art

Agility Assessment (AA) comprises tools, assessment techniques, and frameworks that focus on indicating how a company or a team is applying agile techniques and eventually pointing out problems in adopting agile practices at a project-level, organization-level or individual-level. There are many approaches for AA such as agility assessment models, agility checklists, agility surveys, and agility assessment tools. This report presents the state of the art approaches that support agility assessment

COPPER AND ANTIMONY BASED MATERIAL AND ELECTRODE FOR THE SELECTIVE CONVERSION OF CARBON DIOXIDE TO CARBON MONOXIDE

The present invention relates to a copper and antimony based material, and an electrode obtained from this material, useful for the electrochemical reduction of carbon dioxide to carbon monoxide with high efficiency and selectivity

Caricaturisti e caricaturati al caffè Michelangiolo : ricordi illustrati da 48 caricature tolte dai vecchi originali del tempo / Telemaco Signorini

Caricaturisti e caricaturati al caffè Michelangiolo : ricordi illustrati da 48 caricature tolte dai vecchi originali del tempo / Telemaco Signorini Firenze : Civelli, 189

La prueba de presunciones en sede laboral. Ejercicio de su tutela para el reconocimiento de una relación laboral en el sector privado en Cuba

El artículo realiza un estudio sobre las deficiencias en la concepción teórica normativa de la prueba de presunción laboral, la cual constituye un medio para la protección de los derechos de los trabajadores contratados en las relaciones de trabajo en Cuba. De ello se desprende la necesidad de fundamentar desde un estudio histórico, doctrinal y normativo presupuestos teóricos que permitan su ejercicio en el proceso, a fin de reconocer una relación laboral

Deformation processes, textural evolution and weakening in retrograde serpentinites

Serpentinites play a key role in controlling fault rheology in a wide range of geodynamic settings, from oceanic and continental rift zones to subduction zones. In this paper, we provide a summary of the most common deformation mechanisms and frictional strengths of serpentine minerals and serpentinites. We focus on deformation mechanisms in retrograde serpentinites, which show a progressive evolution from undeformed mesh and bastite pseudomorphic textures to foliated, ribbon-like textures formed by lizardite with strong crystallographic and shape preferred orientations. We also discuss the possible mechanical significance of anastomosing slickenfibre veins containing ultraweak fibrous serpentines or relatively strong splintery antigorite. Our review and new observations indicate that pressure solution and frictional sliding are the most important deformation mechanisms in retrograde serpentinite, and that they are frictionally weak (μ~0.3). The mineralogical and microstructural evolution of retrograde serpentinites during shearing suggests that a further reduction of the friction coefficient to μ of 0.15 or less may occur during deformation, resulting in a sort of continuous feedback weakening mechanism

Wireless access architectures for video applications: the approach proposed in the MEDIEVAL project

ISSN: 1530-1346, ISBN: 978-1-4244-7754-8 (Print)Video transmission is expected to be the next big thing in personal communication systems. While text messaging applications have already experienced an explosive growth, the exchange of multimedia content is still lacking architectural solutions which enable it to become the next killer application. The EU project MEDIEVAL (MultimEDia transport for mobIlE Video AppLications) [1] aims at filling this gap. In this paper we describe the approaches envisioned by the project for what concerns the data link layer, with special emphasis on wireless access and its related cross-layer issues. After presenting some general project aspects, we will review the state of the art and enumerate several open issues, concerning the identification of the most suitable radio technologies for video support, as well as their integration and required enhancements to enable efficient video transport.TRUEpu