Adding QoS protection in order to enhance MPLS QoS routing

In this paper, a method for enhancing current QoS routing methods by means of QoS protection is presented. In an MPLS network, the segments (links) to be protected are predefined and an LSP request involves, apart from establishing a working path, creating a specific type of backup path (local, reverse or global). Different QoS parameters, such as network load balancing, resource optimization and minimization of LSP request rejection should be considered. QoS protection is defined as a function of QoS parameters, such as packet loss, restoration time, and resource optimization. A framework to add QoS protection to many of the current QoS routing algorithms is introduced. A backup decision module to select the most suitable protection method is formulated and different case studies are analyzed

Phase behavior and rheological analysis of reverse liquid crystals and W/I2, W/H2 gel emulsions using an amphiphilic block copolymer.

This article reports the phase behavior determi- nation of a system forming reverse liquid crystals and the formation of novel disperse systems in the two-phase region. The studied system is formed by water, cyclohexane, and Pluronic L-121, an amphiphilic block copolymer considered of special interest due to its aggregation and structural proper- ties. This system forms reverse cubic (I2) and reverse hexagonal (H2) phases at high polymer concentrations. These reverse phases are of particular interest since in the two-phase region, stable high internal phase reverse emulsions can be formed. The characterization of the I2 and H2 phases and of the derived gel emulsions was performed with small-angle X-ray scattering (SAXS) and rheometry, and the influence of temperature and water content was studied. TheH2 phase experimented a thermal transition to an I2 phase when temperature was increased, which presented an Fd3m structure. All samples showed a strong shear thinning behavior from low shear rates. The elasticmodulus (G0) in the I2 phase was around 1 order of magnitude higher than in theH2 phase. G0 was predominantly higher than the viscousmodulus (G00). In the gel emulsions,G0 was nearly frequency-independent, indicating their gel type nature. Contrarily to water-in-oil (W/O) normal emulsions, in W/I2 and W/H2 gel emulsions, G0, the complex viscosity (|η*|), and the yield stress (τ0) decreased with increasing water content, since the highly viscous microstructure of the con- tinuous phase was responsible for the high viscosity and elastic behavior of the emulsions, instead of the volumefraction of dispersed phase and droplet size. A rheological analysis, in which the cooperative flow theory, the soft glass rheology model, and the slip plane model were analyzed and compared, was performed to obtain one single model that could describe the non-Maxwellian behavior of both reverse phases and highly concentrated emulsions and to characterize their microstructure with the rheological properties.

Periodic solutions of second-order differential inclusions systems with p-Laplacian

Some existence results are obtained for periodic solutions of nonautonomous second-order differential inclusions systems with p-Laplacian

Periodic solutions for nonautonomous second order differential inclusions systems with p- Laplacian

Using the nonsmooth variant of minimax point theorems, some existence results are obtained for periodic solutions of nonautonomous second-order differential inclusions systems with p-Laplacian.

Sequencing games without initial order

In this note we study uncertainty sequencing situations, i.e., 1-machine sequencing situations in which no initial order is specified. We associate cooperative games with these sequencing situations, study their core, and provide links with the classic sequencing games introduced by Curiel et al. (1989). Moreover, we propose and characterize two simple cost allocation rules for uncertainty sequencing situations with equal processing times.

On moduli of smoothness of fractional order

In this paper we consider the properties of moduli of smoothness of fractional order. The main result of the paper describes the equivalence of the modulus of smoothness and a function from some class.

Limit cycles for cubic systems with a symmetry of order 4 and without in nite critical points

"Vegeu el resum a l'inici del document del fitxer adjunt."

On the upper bound of the number of limit cycles obtained by the second order averaging method I

"Vegeu el resum a l'inici del document del fitxer adjunt."

On the upper bound of the number of limit cycles obtained by the second order averaging method II

"Vegeu el resum a l'inici del document del fitxer adjunt."

The third order Melnikov function of a quadratic center under quadratic perturbation

We study quadratic perturbations of the integrable system (1+x)dH; where H =(x²+y²)=2: We prove that the first three Melnikov functions associated to the perturbed system give rise at most to three limit cycles.

Dynamics of the third order Lyness' difference equation

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Clean Development Mechanism and Sustainable Development: a discussion on the link between the CDM and Sustainable Development, an analysis of the current status of the CDM portfolio, and an multicriteria evaluation of the effects of additional incentives in order to foster broad local Sustainable Development dividends from the CDM projects

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Redirecció de l'especificitat de les cél·lules T contra epítops del VIH restringit per la HLA-A2 mitjaçant transferència genética

Existeixen creixents evidències què la resposta dels limfòcits T CD8+ alpha beta citotòxics (CTLs) és un element fonamental en la infecció produïda pel VIH. Les CTLs VIH especifiques es consideren molt importants en la reducció de la càrrega viral i en la contenció de la infecció. Encara que la combinació dels antiretrovirals (HAART) ha suposat una millora considerable en la lluita contra el VIH induint una important reducció de la càrrega viral i augmentant el nombre de cèl•lules T CD4+, diverses complicacions han fet ressaltar la necessitat de noves alternatives terapèutiques. Les complicacions inclouen: manca de recuperació d’una resposta immune sòlida contra el VIH, toxicitat a llarg termini de la teràpia i el descobriment que les cèl•lules T CD4+ constitueixen un reservori pel virus. Les noves alternatives controlaran la replicació viral i reconstituiran la immunitat. L’eficàcia de la immunoteràpia cel•lular amb transferència adoptiva de CTLs virals específics s’ha provat en diferents infeccions virals humanes, incloent el VIH. Proposem una modificació de la immunoteràpia adoptiva redirigint l’especificitat de les cèl•lules T contra el VIH mitjançant la transfecció dels gens del TCR. En aquest assaig preclínic, ens aprofitarem de la tecnologia dels animals transgènics per les molècules de HLA, amb la finalitat de generar TCRs d’alta afinitat dirigits contra epitops del VIH restringits per la molècula HLA. Aquests TCRs seran induïts in vivo i seleccionats in vitro. Les cadenes alpha i beta dels TCRs VIH específics procedents de les CTLs seran clonades mitjançant tècniques de biologia molecular. Aquests TCRs VIH específics seran transferits a cèl•lules T CD8+ humanes i la seva especificitat i capacitat citolítica contra cèl•lules diana que presentin antígens de VIH-1 s’estudiaran mitjançant la combinació de diverses tècniques noves (FCC, transfecció mitjançant Nucleoefector). Finalment, una construcció retroviral adient per la seva transducció en cèl•lules T humanes s’establirà amb un TCR òptim seleccionat.

A public-key cryptosystem based on second order linear sequences

Based on Lucas functions, an improved version of the Diffie-Hellman distribution key scheme and to the ElGamal public key cryptosystem scheme are proposed, together with an implementation and computational cost. The security relies on the difficulty of factoring an RSA integer and on the difficulty of computing the discrete logarithm.

A public key encryption based on third order linear sequences

Based on third order linear sequences, an improvement version of the Diffie-Hellman distribution key scheme and the ElGamal public key cryptosystem scheme are proposed, together with an implementation and computational cost. The security relies on the difficulty of factoring an RSA integer and on the difficulty of computing the discrete logarithm.