Parallel spinors on pseudo-riemannian spin(q) manifolds

We study simply-connected irreducible non-locally symmetric pseudo-Riemannian Spin(q) manifolds admitting parallel quaternionic spinors.

Mieloma múltiple: rendimiento del estudio del cariotipo por técnicas convencionales y de hibridación in situ fluorescente. Significado pronóstico de las ganacias de 1 q.

En éste estudio analizamos el rendimiento de las técnicas citogenéticas utilizadas en los protocolos diagnósticos del MM (CC y técnicas de FISH). En primer lugar caracterizamos la serie de pacientes y los estratificamos en grupos de riesgo según los sistemas de estadificación actuales. Después estudiamos el porcentaje de cariotipos patológicos con cada una de las técnicas y en conjunto, encontrando un 40% de cariotipos patológicos por CC y de estos un 11,5% pertenecían a estudios con recuentos de CP ≤20% por citomorfología. La técnica de FISH aumentó hasta un 68% los cariotipos patológicos. También hemos realizado la caracterización de los pacientes con ganancias de 1q y su impacto en la evolución de la enfermedad.

Lightweight monitoring of label switched paths for bandwidth management

The purpose of resource management is the efficient and effective use of network resources, for instance bandwidth. In this article, a connection oriented network scenario is considered, where a certain amount of bandwidth is reserved for each label switch path (LSP), which is a logical path, in a MPLS or GMPLS environment. Assuming there is also some kind of admission control (explicit or implicit), these environments typically provide quality of service (QoS) guarantees. It could happen that some LSPs become busy, thus rejecting connections, while other LSPs may be under-utilised. We propose a distributed lightweight monitoring technique, based on threshold values, the objective of which is to detect congestion when it occurs in an LSP and activate the corresponding alarm which will trigger a dynamic bandwidth reallocation mechanism

Q?Web

Q?Web és un projecte de programari emmarcat dins l'àmbit de l'anomenat Technology Enhanced Learning (TEL). Aquest àrea de coneixement fa referència a l'ús de les TIC's per donar suport a qualsevol activitat d'aprenentatge.

Frequency dynamics of gain-switched injection-locked semiconductor lasers

The frequency dynamics of gain-switched singlemode semiconductor lasers subject to optical injection is investigated. The requirements for low time jitter and reduced frequency chirp operation are studied as a function of the frequency mismatch between the master and slave lasers. Suppression of the power overshoot, typical during gain-switched operation, can be achieved for selected frequency detunings.

Preguntes i respostes - Play Q&A : Programació d'aplicacions per a dispositius mòbils usant HTML5

Desenvolupament d'una aplicació per a estudiants on poden practicar els coneixements adquirits a les seves assignatures amb un joc de preguntes i respostes.

On the q=1/2 non-extensive maximum entropy distribution

A detailed mathematical analysis on the q = 1/2 non-extensive maximum entropydistribution of Tsallis' is undertaken. The analysis is based upon the splitting of such adistribution into two orthogonal components. One of the components corresponds to theminimum norm solution of the problem posed by the fulfillment of the a priori conditionson the given expectation values. The remaining component takes care of the normalizationconstraint and is the projection of a constant onto the Null space of the "expectation-values-transformation"

Improving Label Space Usage for Ethernet Label Switched Paths

Ethernet is becoming the dominant aggregation technology for carrier transport networks; however, as it is a LAN technology, native bridged ethernet does not fulfill all the carrier requirements. One of the schemes proposed by the research community to make ethernet fulfill carrier requirements is ethernet VLAN-label switching (ELS). ELS allows the creation of label switched data paths using a 12-bit label encoded in the VLAN TAG control information field. Previous label switching technologies such as MPLS use more bits for encoding the label. Hence, they do not suffer from label sparsity issues as ELS might. This paper studies the sparsity issues resulting from the reduced ELS VLAN-label space and proposes the use of the label merging technique to improve label space usage. Experimental results show that label merging considerably improves label space usage

On the interplay between Q^2 and t dependence in exclusive diffractive production of real photons and vector mesons in ep collisions

We show how the familiar phenomenological way of combining the Q2 (photon virtuality) and t (squared momentum transfer) dependences of the scattering amplitude in Deeply Virtual Compton Scattering (DVCS) [1, 2] and Vector Meson Production (VMP) [2] processes can be understood in an off-mass-shell generalization of dual amplitudes with Mandelstam analyticity [3]. By comparing different approaches, we managed also to constrain the numerical values of the free parameters.