Multipole modes and spin features in the Raman spectrum of nanoscopic quantum rings

We present a systematic study of ground state and spectroscopic properties of many-electron nanoscopic quantum rings. Addition energies at zero magnetic field (B) and electrochemical potentials as a function of B are given for a ring hosting up to 24 electrons. We find discontinuities in the excitation energies of multipole spin and charge density modes, and a coupling between the charge and spin density responses that allow to identify the formation of ferromagnetic ground states in narrow magnetic field regions. These effects can be observed in Raman experiments, and are related to the fractional Aharonov-Bohm oscillations of the energy and of the persistent current in the ring

Ground-state self-consistent calculation of quantum dots under magnetic fields: Addition spectrum

A density-functional self-consistent calculation of the ground-state electronic density of quantum dots under an arbitrary magnetic field is performed. We consider a parabolic lateral confining potential. The addition energy, E(N+1)-E(N), where N is the number of electrons, is compared with experimental data and the different contributions to the energy are analyzed. The Hamiltonian is modeled by a density functional, which includes the exchange and correlation interactions and the local formation of Landau levels for different equilibrium spin populations. We obtain an analytical expression for the critical density under which spontaneous polarization, induced by the exchange interaction, takes place.

Isolation and characterization of broad spectrum bacteriophages lytic to Vibrio harveyi from shrimp farms of Kerala, India

Of 33 phages isolated from various shrimp farms in Kerala, India, six were segregated to have broad spectrum lytic efficiency towards 87 isolates of Vibrio harveyi with cross-infecting potential to a few other important aquaculture pathogens. They were further tested on beneficial aquaculture micro-organisms such as probiotics and nitrifying bacterial consortia and proved to be noninfective. Morphological characterization by transmission electron microscopy (TEM) and molecular characterization by RAPD and SDS-PAGE proved them distinct and positioned under Caudovirales belonging to Myoviridae and Siphoviridae

The Li-like KLL-Auger spectrum of foil excitation Ne-projectiles

KLL-Auger transitions of the three electron system in Ne have been recorded in a coincidence experiment frec of contaminants from other systems. Energies as well as intensities are compared with calculated values.

Propiedades psicométricas de la versión española del Obsessive Belief Questionnaire-Children Version (OBQ-CV) en una muestra no clínica.

Resumen tomado de la publicación

Propiedades psicom??tricas del Vancouver Obsessional Compulsive Inventory (VOCI) en dos muestras no cl??nicas de poblaci??n espa??ola

Resumen tomado de la publicaci??n

The Spectrum of knowledge - starting off

A few files for background reading

Spectrum Posters

Please load your posters to this share!

Terapia asistida con perros en niños con autismo revisión sistemática

Introducción: El autismo es un trastorno temprano y masivo del desarrollo en el cual se afecta la interacción social, el desarrollo del lenguaje, se presentan rituales y estereotipias. Hay evidencia que la interacción con un perro está asociada con efectos positivos en la salud del niño, lo cual se extiende al terreno terapéutico donde la compañía del perro estimula habilidades comunicativas para conectarse con el mundo exterior y romper el aislamiento que lo hace refractario a formas convencionales de tratamiento. El objetivo del estudio fue realizar una Revisión Sistemática sobre efectos de la terapia con perros en niños autistas entre dos y doce años. Metodología: Revisión sistemática de la literatura de artículos obtenidos de bases de datos, revisiones sistemáticas y Meta-buscadores que proporcionaron evidencia de la terapia con perros en niños autistas. Se describió características y resultados de estudios obtenidos. Resultados: Dos artículos cumplieron criterios de inclusión. Cuatro niños fueron evaluados en dichos estudios. La presencia del perro disminuyó la agresividad, las conductas ritualizadas y obsesivas. Potencializó los comportamientos positivos como contacto visual y comunicación social. Discusión: la terapia asistida con perros proporciona un gran potencial en la intervención del trastorno autista. Relevante tener en cuenta algunos factores como: efectos a largo plazo, el perro a utilizar y la heterogeneidad del espectro autista que pueden condicionar líneas de investigación futura. Conclusiones: Es importante la realización de estudios de mayor rigor metodológico que permitan fortalecer la evidencia sobre los resultados de la terapia con perros en niños con autismo.

Conceptualization and therapeutic treatment of a compulsive gambling case by Functional Analysis and Acceptance and Commitment Therapy

A clinical case of compulsive gambling is exposed in this article. The subject’s playing behaviour had both positive and negative consequences. The subject tried to practice control over the urge to play. As shown in the functional analysis, the failure to control the urge despite the best efforts worsened the problem due to its negative consequences. A variation of acceptance and commitment therapy (ACT) was applied in order to break down the fight-surrender vicious circle of the playing behaviour. Two treatment strategies were agreed upon: acceptance of the fact that both playing and not playing had negatives consequences and commitment to one of these options despite its disadvantages. Finally, it is proposed that this acceptance and commitment therapy is a useful therapeutic process as it decreases the suffering subject and eliminates the problem: playing bahaviour.