Security of Plug-and-Play QKD Arrangements with Finite Resources

The security of a passive plug-and-play QKD arrangement in the case of finite (resources) key lengths is analysed. It is assumed that the eavesdropper has full access to the channel so an unknown and untrusted source is assumed. To take into account the security of the BB84 protocol under collective attacks within the framework of quantum adversaries, a full treatment provides the well-known equations for the secure key rate. A numerical simulation keeping a minimum number of initial parameters constant as the total error sought and the number of pulses is carried out. The remaining parameters are optimized to produce the maximum secure key rate. Two main strategies are addressed: with and without two-decoy-states including the optimization of signal to decoy relationship

Alteration by EGTA of the human red cell Ca2+-ATPase

AbstractThe effect of EGTA on Ca2+-ATPase activity was studied in fragmented membranes and solubilized preparations from human red cells. A dual action was found. At low concentrations (0.1–1 mM), EGTA increased Ca2+ affinity without affecting Vmax. By contrast, high concentrations (5–10 mM), EGTA was inhibitory. Both effects were partially reversible

Assessment of a Universal Reconfiguration-less Control Approach in Open-Phase Fault Operation for Multiphase Drives

Multiphase drives have been important in particular industry applications where reliability is a desired goal. The main reason for this is their inherent fault tolerance. Di erent nonlinear controllers that do not include modulation stages, like direct torque control (DTC) or model-based predictive control (MPC), have been used in recent times to govern these complex systems, including mandatory control reconfiguration to guarantee the fault tolerance characteristic. A new reconfiguration-less approach based on virtual voltage vectors (VVs) was recently proposed for MPC, providing a natural healthy and faulty closed-loop regulation of a particular asymmetrical six-phase drive. This work validates the interest in the reconfiguration-less approach for direct controllers and multiphase drives

Computación cuántica : nuevas perspectivas en el tratamiento de la información

Peer Reviewe

Wealth inequality and stratification by social classes in 21st-century Europe

Wealth is a central determinant of life chances and intergenerational status persistence in modern societies. Yet, sociologists traditionally overlooked its role in class measurement and inequality, while most economists focused on the elites. This article reconciles sociological and economic perspectives on class analysis by examining the relationship between classes and wealth inequality versus income. Drawing from the Luxembourg Wealth Study (2002-2018) in five European countries, we test whether occupational classes, based on the entire division of labour, keep up with rising economic inequality trends. In contrast to bold claims on class death or decomposition, inequality of outcomes in wealth accumulation is firmly rooted across occupational classes in contemporary capitalism, potentially harming future equal opportunity and social mobility. Still, occupational classes better capture between-group income inequality and stratification than wealth, emphasising the importance of economic resources beyond labour market attachment that spark advances in social class theory and measurement