Liquid crystal spatial light modulator with optimized phase modulation ranges to display multiorder diffractive elements

Postprint (published version

First-order and multi-order diffractive lens using a device with 8P phase modulation range

Postprint (published version

Roadmap on optical security

Postprint (author's final draft

Image encryption system based on a nonlinear joint transform correlator for the simultaneous authentication of two users

We propose a new encryption system based on a nonlinear joint transform correlator (JTC) using the information of two biometrics (one digital fingerprint for each user) as security keys of the encryption system. In order to perform the decryption and authentication in a proper way, it is necessary to have the two digital fingerprints from the respective users whose simultaneous authentication is pursued. The proposed security system is developed in the Fourier domain. The nonlinearity of the JTC along with the five security keys given by the three random phase masks and the two digital fingerprints of the two users allow an increase of the system security against brute force and plaintext attacks. The feasibility and validity of this proposal is demonstrated using digital fingerprints as biometrics in numerical experiments.Peer ReviewedPostprint (published version

Image quality and security through nonlinear joint transform encryption

Postprint (published version

Effects of using an encrypted image corrupted by noise and occlusion in a security system based on joint transform correlator and Gyrator transform

Postprint (published version

La ideología en la interpretación simultánea del discurso político estadounidense: una aproximación cualitativa

This article shows the results of a  qualitative research conducted on the ideological transmission that takes place during the simultaneous interpreting of political speeches  targeting large media audiences in the USA. To this end we will analyse different fragments, studying the effects on the original ideology brought about by each interpreter and the impact they have on the message received by the two different target audiences.En este artículo se mostrarán los resultados de un estudio cualitativo en el que nos hemos propuesto estudiar la transmisión de la ideología que realizan los intérpretes para los medios de discursos políticos estadounidenses, que cuentan con una gran difusión y alcanzan un amplio número de receptores. De este modo, observaremos y analizaremos cómo mediante la traducción de cada intérprete, se altera o modifica la ideología del original, lo que, por tanto, hará que el mensaje original en lengua A y el traducido en lengua B tengan unas consecuencias y un impacto comunicativo diferente para los públicos de ambos discursos

Effectiveness of social marketing strategies to reduce youth obesity in European school-based interventions : a systematic review and meta-analysis

Peer reviewedPublisher PD

Heterogeneity of Intrinsic and Synaptic Properties of Neurons in the Ventral and Dorsal Parts of the Ventral Nucleus of the Lateral Lemniscus

The ventral nucleus of the lateral lemniscus (VNLL) provides a major inhibitory projection to the inferior colliculus (IC). Neurons in the VNLL respond with various firing patterns and different temporal precision to acoustic stimulation. The present study investigates the underlying intrinsic and synaptic properties of various cell types in different regions of the VNLL, using in vitro electrophysiological recordings from acute brain slices of mice and immunohistochemistry. We show that the biophysical membrane properties and excitatory input characteristics differed between dorsal and ventral VNLL neurons. Neurons in the ventral VNLL displayed an onset-type firing pattern and little hyperpolarization-activated current (Ih). Stimulation of lemniscal inputs evoked a large all-or-none excitatory response similar to Calyx of Held synapses in neurons in the lateral part of the ventral VNLL. Neurons that were located within the fiber tract of the lateral lemniscus, received several and weak excitatory input fibers. In the dorsal VNLL onset-type and sustained firing neurons were intermingled. These neurons showed large Ih and were strongly immunopositive for the hyperpolarization- activated cyclic nucleotide-gated channel 1 (HCN1) subunit. Both neuron types received several excitatory inputs that were weaker and slower compared to ventrolateral VNLL neurons. Using a mouse model that expresses channelrhodopsin under the promotor of the vesicular GABA transporter (VGAT) suggests that dorsal and ventral neurons were inhibitory since they were all depolarized by light stimulation. The diverse membrane and input properties in dorsal and ventral VNLL neurons suggest differential roles of these neurons for sound processing