The quantum ground state of self-organized atomic crystals in optical resonators

Cold atoms, driven by a laser and simultaneously coupled to the quantum field of an optical resonator, can self-organize in periodic structures. These structures are supported by the optical lattice, which emerges from the laser light they scatter into the cavity mode, and form when the laser intensity exceeds a threshold value. We study theoretically the quantum ground state of these structures above the pump threshold of self-organization, by mapping the atomic dynamics of the self-organized crystal to a Bose-Hubbard model. We find that the quantum ground state of the self-organized structure can be the one of a Mott-insulator or a superfluid, depending on the pump strength of the driving laser. For very large pump strengths, where the intracavity intensity is maximum and one would expect a Mott-insulator state, we find intervals of parameters where the system is superfluid. These states could be realized in existing experimental setups.Comment: 11 pages, 4 figure

Non-linear optics with two trapped atoms

We show theoretically that two atomic dipoles in a resonator constitute a non-linear medium, whose properties can be controlled through the relative position of the atoms inside the cavity and the detuning and intensity of the driving laser. We identify the parameter regime where the system operates as a parametric amplifier, based on the cascade emission of the collective dipole of the atoms, and determine the corresponding spectrum of squeezing of the field at the cavity output. This dynamics could be observed as a result of self-organization of laser-cooled atoms in resonators.Comment: 11 pages, 8 figure

Prácticas rituales ibéricas en la Cueva del Sapo (Chiva, Valencia): Más allá del caliciforme

Se presentan los resultados del estudio interdisciplinar del yacimiento ibérico de la Cueva del Sapo (Chiva, Valencia). Las características del conjunto estudiado muestran un contexto ritual que sería frecuentado entre los ss. v-ii a. C. La diversidad cronológica y material así como el volumen de restos indican la existencia de varias actividades rituales intermitentes, no generalizadas y que se suceden en el tiempo. Nos acercamos a ellas a través de la presencia de restos de fauna, con escasas evidencias de consumo que relejan un ritual principal en torno a la figura del ciervo, huesos humanos sin incinerar con marcas que demuestran un tratamiento concreto del cadáver ligado a un complejo ritual funerario en época ibérica y otros materialescerámicas, metales y carbones que también son pruebas de una actividad ritual en la cueva, cuyas características difieren de los criterios tradicionales establecidos para las cuevas con materiales ibéricos. Todos estos factores nos hacen replantearnos la definición tradicional, todavía vigente, para este tipo de contextos rituales, cargada en algunas ocasiones de excesivas generalizaciones

Imatge i moviment a través de l’art contemporani en Educació Infantil

Dissetenes Jornades de Foment de la Investigació de la FCHS (Any 2012)L'experiència que presentem forma part del conjunt d'activitats del projecte d'innovació educativa Espais d’art contemporani como recurs didàctic en Educació Infantil, desenvolupat durant el curs 2011-2012. Els objectius principals del qual van ser, d'una banda, treballar en Educació Artística a través d'experiències amb l'art contemporani en altres contextos i per un altra, generar vies de comunicació i col·laboració entre tres institucions. La investigació es va dur a terme amb un equip integrat per docents de l'Àrea de Didàctica de l'Expressió Plàstica de la Universitat Jaume I (UJI), el responsable del gabinet didàctic de l’Espai d’Art Contemporani de Castelló (EACC), professorat d'Infantil del Col·legi Carmelitas i alumnat de les titulacions de Magisteri. En aquesta comunicació mostrarem el procés de treball amb xiquets/es de segon cicle d'infantil a partir de l'exposició Darcy Lange: estudi d’un artista a la feina, celebrada en l’EACC durant el primer trimestre de 2012. L'exposició era una mostra de la preocupació de l'artista durant la seua trajectòria per documentar el treball diari en diferents països i situacions amb el vídeo i la fotografia. Per tant, dissenyarem activitats per treballar la imatge i el moviment reproduint els mitjans utilitzats per l'artista i el contingut de l'exposició. En una primera activitat, vam treballar els processos bàsics per a l'obtenció d'una fotografia, en una segona, mitjançant jocs, endevinalles i dramatitzacions, els oficis, connectant les peces de l'artista amb la realitat del xiquet/a a través d'objectes familiars. En una tercera, el concepte del moviment amb el conegut experiment El cavall en moviment del fotògraf i investigador Eadweard J. Muybridge. Finalment, vincularem les experiències de tal manera que tant les aules com l’EACC van constituir llocs d'aprenentatge comunicats.The experience that is part of the activities of innovative educational project contemporary art space as resource Teaching in Early Childhood Education , developed during 2011-2012 . the whose main objectives were , first , to work in Education Artistic experiences through contemporary art in other contexts and for another , build roads and collaboration between three institutions . The research was conducted with a team of for teachers of the Department of Education in the University of Plastic Expression Jaume I ( UJI ) , the head of the cabinet of teaching Art Space Contemporary Castelló ( EACC ) , Nursery Teachers College Carmelite students and degrees of Teaching. in this communication show the process of working with children / second is cycle of children from exposure Darcy Lange : Study of an artist at work in the EACC held during the first quarter of 2012 . exposure was a sign of the concern of the artist during his career to document the daily work in different countries and situations with video and photography . Therefore , designing activities to work reproducing the moving image and media used by the artist and content of the exhibition. In the first activity , we work on basic processes for obtaining a picture in a second , with games , puzzles and drama , crafts , connecting the pieces of the artist with the reality of child / yy through familiar objects . In a third , the concept of the movement known experiment horse in motion photographer Eadweard J. and researcher Muybridge . Finally, binding experiments so that both classrooms EACC constituted as places of learning statements

Fisioterapia con miofeedback en la transposición muscular del temporal para control de la oclusión ocular

[Resumen] En septiembre de 1994 ingresó en nuestra Unidad de la Escuela Universitaria de Fisioterapia de A Coruña una paciente intervenida en diciembre de 1990 de un neurinoma del VIII par, presentando postcirugía una parálisis completa izquierda del VII par, confirmada como total en electromiografía. En enero de 1994 se realiza una transposición muscular del temporal izquierdo con los objetivos de obtener una suspensión dinámica de la comisura bucal y la oclusión ocular durante la masticación. Al ingreso en nuestra Unidad no presentaba control voluntario del orbicular del párpado izquierdo, a pesar de que el masetero y temporal izquierdo, según escala de Lacôte, tenían una graduación de 3+. La paciente no disociaba la oclusión de un párpado con respecto al otro. El objetivo del tratamiento fisioterápico por medio de miofeedback fue el de obtener la oclusión del párpado izquierdo y posibilitar la disociación de ambos párpados, objetivo logrado al cabo de 30 sesiones de tratamiento.[Abstract] In September 1994 a patient was admitted to our unit o/ the School o/ Physical Therapy o/ A Coruña, Spain, after surgery in December 1990 for neuroma o/the VIII cranial pair, confirmed as total by electromyography In January 1994, the left temporal muscle was transposed to obtain dynamic suspension o/ the buccal commissure and ocular occlusion during mastication. At the time o/ admission the patient did not have voluntary controlo/ the left orbicular o/ the left eyelid, although the masseter and left temporal muscles were 3+ on the Lacôte scale. The patient could not dissociate the occlusion ot one eyelid with respect to the other. The purpose o/physical therapy with myofeedback was to obtain the occlusion o/ the left eyelid and dissociation o/ the eyelids. This goal was achieved after 30 treatment sessions

Prevention of Children’s Burnout at School through the Tutoring and Guidance Process. A Structural Equation Model Analysis

The school burnout of children, defined as physical and mental exhaustion due to a lack of adjustment to the educational context, constitutes a serious problem in contemporary education. Thus, the determination of the elements that influence it and the possible strategies for avoiding it are key in the process of improving children’s well-being. A descriptive and cross-sectional study was conducted with a sample of 569 children aged 8 to 13 at eight primary education schools in Granada (Spain). With the aim of examining the association between the possible exhaustion of children and planned tutoring and guidance activities, a structural equation model (SEM) as the analytical technique was used. The results show good fit indices for the model (comparative fit index (CFI) = 0.955; normalised fit index (NFI) = 0.956; incremental fit index (IFI) = 0.946; root mean squared error approximation (RMSEA) = 0.089), which reflects the need for tutoring and guidance activities that are infused throughout the entire teaching process in order to preserve children’s well-being.XXVI Program for supporting practical teaching, Vice-Rectorate for Teaching and Learning, University of Granada (Spain) 625/E/

Epidemiología y pronóstico de los pacientes con VIH ingresados en la UCI en la era de tratamiento antirretroviral de gran actividad actual

Observational study[Abstract] Purpose: To describe the epidemiology of critical disease in HIV-infected patients during the current highly active antiretroviral therapy (HAART) era and to identify hospital mortality predictors. Methods: A longitudinal, retrospective observational study was made of HIV-infected adults admitted to the ICU in two Spanish hospitals between 1 January 2000 and 31 December 2014. Demographic and HIV-related variables were analyzed, together with comorbidities, severity scores, reasons for admission and need for organ support. The chi-squared test was used to compare categorical variables, while continuous variables were contrasted with the Student's t-test, Mann-Whitney U-test or Kruskal-Wallis test, assuming an alpha level=0.05. Multivariate logistic regression analysis was used to calculate odds ratios for assessing correlations to mortality during hospital stay. Joinpoint regression analysis was used to study mortality trends over time. Results: A total of 283 episodes were included for analyses. Hospital mortality was 32.9% (95%CI: 21.2-38.5). Only admission from a site other than the Emergency Care Department (OR 3.64, 95%CI: 1.30-10.20; p=0.01), moderate-severe liver disease (OR 5.65, 95%CI: 1.11-28.87; p=0.04) and the APACHE II score (OR 1.14, 95%CI: 1.04-1.26; p<0.01) and SOFA score at 72h (OR 1.19, 95%CI: 1.02-1.40; p=0.03) maintained a statistically significant relationship with hospital mortality. Conclusions: Delayed ICU admission, comorbidities and the severity of critical illness determine the prognosis of HIV-infected patients admitted to the ICU. Based on these data, HIV-infected patients should receive the same level of care as non-HIV-infected patients, regardless of their immunological or nutritional condition.[Resumen] Objetivos. Describir la epidemiología de la patología crítica en el paciente infectado por VIH durante la era de tratamiento antirretroviral de gran actividad actual y encontrar predictores de mortalidad hospitalaria. Métodos. Estudio observacional, retrospectivo y longitudinal que incluye pacientes infectados por VIH adultos ingresados en las UCI de hospitales de Galicia, entre el 1 de enero de 2000 y el 31 de diciembre de 2014. Analizamos variables demográficas y relacionadas con la infección por el VIH, comorbilidades, puntuaciones de gravedad, motivo de ingreso y necesidad de soporte de órganos. Empleamos la prueba de la Chi-cuadrado para comparar las variables categóricas y las pruebas de la T-Student, U de Mann-Whitney o H de Kruskal-Wallis para las variables continuas, asumiendo un error α = 0,05. Utilizamos la regresión logística multivariante para calcular la OR de la asociación con la mortalidad hospitalaria. Aplicamos análisis de regresión de joinpoint para estudiar la tendencia temporal de mortalidad. Resultados. Incluimos 283 episodios. La mortalidad hospitalaria fue del 32,9% (IC 95% = 21,2-38,5%). El ingreso no procedente de Urgencias (OR 3,64; IC 95% = 1,30-10,20; p = 0,01), la enfermedad hepática moderada-grave (OR 5,65; IC 95% = 1,11-28,87; p = 0,04), el APACHE II (OR 1,14; IC 95% = 1,04-1,26; p < 0,01) y el SOFA a las 72 h (OR 1,19; IC 95% = 1,02-1,40; p = 0,03) se relacionan con la mortalidad hospitalaria en el análisis multivariante. Conclusiones. El retraso en el ingreso en UCI, las comorbilidades y la gravedad del episodio determinan el pronóstico del paciente infectado por VIH ingresado en UCI. Los pacientes con VIH deberían recibir el mismo nivel de cuidados que los pacientes no infectados por VIH, independientemente de su estado inmunológico o nutricional

Environmental education through musical education

La Educación Ambiental supone un reto importante para la actualidad. Atendiendo a la situación crítica de nuestro planeta y con la obligación moral de sensibilizar al alumno en sus primeros años se pretende, utilizando el carácter interdisciplinario de la Educación Musical, dar a conocer las diferentes posturas y elementos que ambas áreas tienen en común. Este supone un primer paso indispensable y necesario, antes de realizar una posible propuesta de intervención pedagógicaEnvironmental Education is a major challenge for today. Attending to the critical situation of our planet and with the moral obligation to sensitize the student in its early years it is intended, by means of the interdisciplinary nature of Music Education, to release the different positions and elements that both areas have in common. This is an essential and necessary first step, before making a possible proposal for pedagogical interventio

Classdojo: a gamification and communication tool for the improvement of the educational process

En este estudio se aborda la influencia que pueden tener herramientas de gamificación y comunicación en el proceso educativo, más concretamente en la etapa de la Educación Primaria. Se presenta la plataforma y aplicación ClassDojo como una de las más atractivas para ello y con una aportación motivacional bastante relevante en el alumnado. A través de este estudio realizaremos una visión pormenorizada de las diferentes funcionalidades que nos otorga la herramienta para ello.This study addresses the influence that gamification and communication tools may have on the educational process, more precisely in the stage of Primary Education. The ClassDojo platform and application is presented as one of the most attractive for this field and with a very relevant motivational contribution in the students. Through this study we will carry out a a detailed view of the different functionalities that the tool gives us

Quantum stability of self-organized atomic insulator-like states in optical resonators

We investigate a paradigm example of cavity quantum electrodynamics with many body systems: an ultracold atomic gas inside a pumped optical resonator. In particular, we study the stability of atomic insulator-like states, confined by the mechanical potential emerging from the cavity field spatial mode structure. As in open space, when the optical potential is sufficiently deep, the atomic gas is in the Mott-like state. Inside the cavity, however, the potential depends on the atomic distribution, which determines the refractive index of the medium, thus altering the intracavity field amplitude. We derive the effective Bose-Hubbard model describing the physics of the system in one dimension and study the crossover between the superfluid -- Mott insulator quantum states. We determine the regions of parameters where the atomic insulator states are stable, and predict the existence of overlapping stability regions corresponding to competing insulator-like states. Bistable behavior, controlled by the pump intensity, is encountered in the vicinity of the shifted cavity resonance.Comment: 13 pages, 6 figures. Replaced with revised version. Accepted for publication in New J. Phys., special issue "Quantum correlations in tailord matter