Diseño de una Estación de Trabajo para Personas con Discapacidad en Miembros Superiores Usando una Interfaz Cerebro Computador

This paper shows the design of work-station for work-related inclusion people upper-limb disability. The system involves the use of novel brain computer interface used to bridge the user-computer interaction. Our hope objective is elucidating functional, technological, ergonomic and procedural aspects to runaway operation station; with propose to scratch barrier to impossibility access to TIC’s tools and work done for individual disability person. We found access facility ergonomics, adaptability and portable issue of workstation are most important design criteria. Prototype implementations in workplace environment have TIR estimate of 43% for retrieve. Finally we list a typology of services that could be the most appropriate for the process of labor including: telemarketing, telesales, telephone surveys, order taking, social assistance in disasters, general information and inquiries, reservations at tourist sites, technical support, emergency, online support and after-sales services.  El presente trabajo presenta el diseño de una estación de trabajo para la inclusión laboral de personas en estado de discapacidad en miembros superiores. El sistema involucra el uso de una novedosa interfaz cerebro computador que sirve como puente entre el usuario y el ordenador. Nuestro objetivo es dilucidar los aspectos funcionales, tecnológicos, ergonómicos y procedimentales de la puesta en marcha de la estación de trabajo; con el fin de romper con las barreas que imposibilitan el acceso a las herramientas TIC’s y el trabajo por parte de las personas en estado de discapacidad en miembros superiores. Se encontró que la facilidad de acceso, la ergonomía, la adaptabilidad y la portabilidad de la estación de trabajo son los criterios de diseño más importantes. La implementación de este prototipo en una ambiente laboral tiene una TIR estimada de 43% para retribución. Finalmente se describe una tipología de servicios que podrían ser los más indicados para el proceso de inclusión laboral: telemarketing, televentas, encuestas telefónicas, toma de pedidos, ayuda social en catástrofes, información general y consultas, reservaciones en sitios turísticos, soporte técnico, emergencias, asistencia en línea y servicios posventa

Electroreflectance spectroscopy in self-assembled quantum dots: lens symmetry

Modulated electroreflectance spectroscopy $\Delta R/R$ of semiconductor self-assembled quantum dots is investigated. The structure is modeled as dots with lens shape geometry and circular cross section. A microscopic description of the electroreflectance spectrum and optical response in terms of an external electric field (${\bf F}$) and lens geometry have been considered. The field and lens symmetry dependence of all experimental parameters involved in the $\Delta R/R$ spectrum have been considered. Using the effective mass formalism the energies and the electronic states as a function of ${\bf F}$ and dot parameters are calculated. Also, in the framework of the strongly confined regime general expressions for the excitonic binding energies are reported. Optical selection rules are derived in the cases of the light wave vector perpendicular and parallel to $$. Detailed calculation of the Seraphin coefficients and electroreflectance spectrum are performed for the InAs and CdSe nanostructures. Calculations show good agreement with measurements recently performed on CdSe/ZnSe when statistical distribution on size is considered, explaining the main observed characteristic in the electroreflectance spectra

Control De Un Motor Utilizando Lógica Difusa Con Reglas Sintonizadas Por Algoritmos Genéticos

En este documento se describe la implementación de un controlador PI difuso incremental con una base de reglas para un motor de corriente continua controlado por campo. La matriz de reglas es sintonizada a través de algoritmos genéticos. El controlador está diseñado para llevar el motor desde una condición inicial de 0 a 100rpm (revoluciones por minuto). Las simulaciones y los resultados obtenidos muestran un comportamiento óptimo del sistema

Control De Un Motor Utilizando Lógica Difusa Con Reglas Sintonizadas Por Algoritmos Genéticos

En este documento se describe la implementación de un controlador PI difuso incremental con una base de reglas para un motor de corriente continua controlado por campo. La matriz de reglas es sintonizada a través de algoritmos genéticos. El controlador está diseñado para llevar el motor desde una condición inicial de 0 a 100rpm (revoluciones por minuto). Las simulaciones y los resultados obtenidos muestran un comportamiento óptimo del sistema

Control De Un Motor Utilizando Lógica Difusa Con Reglas Sintonizadas Por Algoritmos Genéticos

En este documento se describe la implementación de un controlador PI difuso incremental con una base de reglas para un motor de corriente continua controlado por campo. La matriz de reglas es sintonizada a través de algoritmos genéticos. El controlador está diseñado para llevar el motor desde una condición inicial de 0 a 100rpm (revoluciones por minuto). Las simulaciones y los resultados obtenidos muestran un comportamiento óptimo del sistema

Electronic, vibrational, and thermodynamic properties of ZnS (zincblende and rocksalt structure)

We have measured the specific heat of zincblende ZnS for several isotopic compositions and over a broad temperature range (3 to 1100 K). We have compared these results with calculations based on ab initio electronic band structures, performed using both LDA and GGA exchange- correlation functionals. We have compared the lattice dynamics obtained in this manner with experimental data and have calculated the one-phonon and two-phonon densities of states. We have also calculated mode Grueneisen parameters at a number of high symmetry points of the Brillouin zone. The electronic part of our calculations has been used to investigate the effect of the 3d core electrons of zinc on the spin-orbit splitting of the top valence bands. The effect of these core electrons on the band structure of the rock salt modification of ZnS is also discussed.Comment: 33pages, 16 Figures, submitted to Phys. Rev.

Rehabilitation System based on the Use of Biomechanical Analysis and Videogames through the Kinect Sensor

El presente artículo muestra la creación de un novedoso sistema para la rehabilitación física de pacientes con múltiples patologías, a través de dinámicas con videojuegos de ejercicio (exergames) y el análisis de los movimientos de los pacientes usando un software desarrollado. Este sistema está basado en el uso del sensor Kinect para ambos fines: divertir al paciente en su terapia a través de exergames y proporcionarle al especialista una herramienta para el registro y análisis de datos de captura de movimiento (MoCap) tomados a través del sensor Kinect y procesados utilizando análisis biomecánico mediante la transformación angular de Euler. Todo el sistema interactivo se encuentra instalado en un centro de rehabilitación y actualmente se realizan investigaciones con diferentes patologías (stroke, IMOC, trauma craneoencefálico, entre otros), los pacientes realizan sus sesiones con el sistema interactivo mientras el especialista registra los datos para un posterior análisis, el cual se realiza en un software creado para dicho fin. El software arroja gráficas de movimiento en los planos sagital, frontal y rotacional de 20 puntos distribuidos en el cuerpo. El sistema final es portable, no-invasivo, económico, de interacción natural con el paciente y de fácil implementación por parte del personal médico.  This paper presents development of a novel system for physical rehabilitation of patients with multiple pathologies, through dynamic with exercise videogames (exergames) and analysis of the movements of patients using developed software. This system is based on the use of the Kinect sensor for both purposes: amusing the patient in therapy through of specialist exergames and provide a tool to record and analyze MoCap data taken through the Kinect sensor and processed using biomechanical analysis through Euler angles. All interactive system is installed in a rehabilitation center and works with different pathologies (stroke, IMOC, craneoencephallic trauma, etc.), patients interact with the platform while the specialist records data for later analysis, which is performed by software designed for this purpose. The motion graphics are shown in the sagittal, frontal and rotationalplanefrom20 points distributed in the body. The final system is portable, non-invasive, inexpensive, natural interaction with the patient and easily implemented for medical purposes

Electronic and phononic properties of cinnabar: ab initio calculations and some experimental results

We report ab initio calculations of the electronic band structure, the corresponding optical spectra, and the phonon dispersion relations of trigonal alpha-HgS (cinnabar). The calculated dielectric functions are compared with unpublished optical measurements by Zallen and coworkers. The phonon dispersion relations are used to calculate the temperature and isotopic mass dependence of the specific heat which has been compared with experimental data obtained on samples with the natural isotope abundances of the elements Hg and S (natural minerals and vapor phase grown samples) and on samples prepared from isotope enriched elements by vapor phase transport. Comparison of the calculated vibrational frequencies with Raman and ir data is also presented. Contrary to the case of cubic beta-HgS (metacinnabar), the spin-orbit splitting of the top valence bands at the Gamma-point of the Brillouin zone (Delta_0) is positive, because of a smaller admixture of 5d core electrons of Hg. Calculations of the lattice parameters, and the pressure dependence of Delta_0 and the corresponding direct gap E_0~2eV are also presented. The lowest absorption edge is confirmed to be indirect.Comment: 13 pages, 15 figure

Above-bandgap ordinary optical properties of GaSe single crystal

We report above-bandgap ordinary optical properties of ε-phase GaSe single crystal. Reference-quality pseudodielectric function 〈ε(E)〉 = 〈ε1(E)〉+i〈ε2(E)〉 and pseudorefractive index 〈N(E)〉 = 〈n(E)〉+i〈k(E)〉 spectra were measured by spectroscopic ellipsometry from 0.73 to 6.45 eV at room temperature for the light polarization perpendicular to the optic axis (math⊥math). The 〈ε〉 spectrum exhibited several interband-transition critical-point structures. Analysis of second-energy derivatives calculated numerically from the measured data yielded the critical-point energy [email protected]

Pharmacological Opportunities for Prevention of Preeclampsia

Preeclampsia (PE) is a disorder that occurs during pregnancy, it has an estimated worldwide prevalence of 5–8%, being one of the leading causes of maternal and perinatal morbidity and mortality. Currently, different diagnostic criteria exist, however, due to its complexity; the clinical presentation that makes up this syndrome could make its presence unclear. The pathophysiology of PE has been recently postulated and divided into three processes: inadequate uterine remodeling, placental dysfunction and maternal endothelial dysfunction. Despite the advances in the treatment of PE, the outcome of the medical interventions has failed to decrease the morbidity and mortality of this disease. The main reason might be the multifactorial origin of pathogenic processes that lead to the development of PE. That is why treatment is focused on the prevention of PE in patients that might present the risk before developing it late in pregnancy. The knowledge of the pathophysiological factors that trigger the processes that culminate in the presentation of PE, is key for prevention of this disease. However, the origin of these processes is poorly understood. It may be attributed to the ethical considerations that come with the study of these population of patients compared with the study of non-pregnant women