Quantum coherence in the Dynamical Casimir Effect

We propose to use quantum coherence as ultimate proof of quantum nature in the radiation that appears by means of the Dynamical Casimir Effect in experiments with superconducting microwave waveguides. We show that, unlike previously considered measurements of quantum correlations such as entanglement and discord, quantum coherence does not require a threshold value of the external pump amplitude and is highly robust to thermal noise.Comment: v2:minor changes, published version. 7 pages, 2 figure

Validación de la puntuación de apendicitis pediátrica frente a histología para el diagnóstico de apendicitis aguda en población infantil

20 páginas.Trabajo Fin de Máster Universitario en Urgencias y Emergencias Pediátricas (2016/17). Directora: María Teresa Alonso Salas ; Tutora: Isabel Lucía Benítez Gómez. La apendicitis aguda es la causa más frecuente de abdomen agudo en la infancia siendo la indicación quirúrgica más común en niños y adultos jóvenes. Para su identificación la anamnesis y exploración física son esenciales, sin embargo su diagnóstico sigue generando dudas sobre todo en población pediátrica. Desde hace unos años las pruebas complementarias han adquirido mayor relevancia pero sin estar exentas de inconvenientes: irradiación, disponibilidad, médico-dependiente… En los Servicios de Urgencias mixtos estos problemas se acentúan ya que se suma el colapso por múltiples peticiones, escasos recursos e inexperiencia del personal en niños. Por ello la utilización de escalas diagnósticas podrían ser útiles para profesionales poco habituados a explorar a niños ya que, identificaría objetivamente aquellos pacientes a los que continuar realizando más pruebas, operar o bien mandar a domicilio. Objetivo. Determinar la validez de la escala diagnóstica Score Pediatric Apendicitis (PAS) realizada por médicos de urgencias no pediatras, frente a histología para el diagnóstico de apendicitis aguda en pacientes con edades comprendidas entre 4 y 13 años, ambas edades inclusives, en el Servicio de Urgencias de un Hospital Comarcal. Material y Método. Se llevará a cabo un estudio prospectivo observacional en pacientes en edad pediátrica que acudan a Urgencias con sospecha de apendicitis aguda. Se cumplimentará la escala PAS por médicos de urgencias antes de ser intervenidos quirúrgicamente. A los pacientes seleccionados se les recogerá variables sociodemográficas y clínicas que serán registradas en una hoja general de datos por el grupo de investigación.Acute appendicitis is the most frequent cause of acute abdomen in childhood being the most common surgical indication in children and young adults. For identification, the anamnesis and physical examination are essential, however, its diagnosis continues to generate doubts, especially in the pediatric population. For a few years the complementary tests have become more relevant but without being free of drawbacks: irradiation, availability, doctor-dependent ... In the Mixed Emergency Services these problems are accentuated because it adds to the collapse by multiple requests, scarce resources and inexperience of the staff in children. For this reason, the use of diagnostic scales could be useful for professionals not used to exploring children since it would objectively identify those patients who continue to perform more tests, operate or send home. Objective. To determine the validity of the diagnostic scale Pediatric Appendicitis (PAS) performed by non-pediatric emergency physicians, versus histology for the diagnosis of acute appendicitis in patients aged between 4 and 13 years, both ages included, in the Emergency Department of a Regional Hospital. Material and method. A prospective observational study will be carried out in pediatric patients who come to the Emergency Room with suspected acute appendicitis. The PAS scale will be completed by emergency physicians before being operated on surgically. The selected patients will be collected sociodemographic and clinical variables that will be recorded in a general data sheet by the research group

Μελέτη του Μοντέλου Ising σε 2 διαστάσεις με τη μέθοδο Multi Histogram

Εθνικό Μετσόβιο Πολυτεχνείο--Μεταπτυχιακή Εργασία. Διεπιστημονικό-Διατμηματικό Πρόγραμμα Μεταπτυχιακών Σπουδών (Δ.Π.Μ.Σ.) “Φυσική και Τεχνολογικές Εφαρμογές

Anteproyecto de rehabilitación y mejora del Parque Municipal "San Diego" (T. M. de San Cristóbal de La Laguna)

In this preliminary project is proposed the improvement and the recovery of a municipal park located in the municipality of San Cristóbal de La Laguna. It is on bad conditions of usage and because of this, in my work, I pretend to complement it with a new design of an urban park, in order to encourage the citizens to a public access where people will be able to be in contact with green spaces, implementing the ecological, urbanistic and social features. The zone is about 5.416 m2 which can be used, counting with some bush, tree vegetation and herbaceous species, cyclopean wall, concrete curbs, four luminaries and three concrete benches. This preliminary project is constructed with the finality of giving the basic ideas of what, in the future, could be a wider project of recovery and improvement of the municipal park of “San Diego”. The proposal will hold the inclusion of new vegetation adapted to the climatology of the place, with Ulmus minor followed by Schinus molle that as dominant species, as well as native vegetation, for example Dracaena draco or as exotic plant, for example Strelitzia juncea, from trees to act as windbreaker, acoustic barrier and that contribute higher degree of protection and comfort to visitors, among other, to the shrubs and herbaceous plants that can contribute of colour or relief landscaping. It is proposed to the enclosure around the perimeter of the entire park, the illumination, the irrigation, the pavement type asphalt, printed concrete and rubber, the sewerage system and the project location of the furniture, because the park lacks all of these. The theme selected for the design is mainly based on a functional design with zones with different activities like resting zones, playgrounds, psychomotricity zones, a dog park and a picnic zone, in order to satisfy each one of the park users. The new design for the “San Diego” Park in this preliminary draft amounts to the General Budget of the quantity expressed of € 424,689.25.En este anteproyecto se propone la mejora y rehabilitación de un parque municipal ubicado en el término municipal de San Cristóbal de La Laguna. Se encuentra en malas condiciones de uso por lo que se pretende complementar con un nuevo diseño de parque urbano con el fin de favorecer a los ciudadanos de un acceso público donde puedan interactuar con espacios verdes, cumpliendo una funcionalidad ecológica, urbanística y social. La zona cuenta, aproximadamente, con una extensión de 5.416 m2 aprovechables, contando con algunas especies arbustivas, arbóreas y herbáceas, muros ciclópeos, bordillos de hormigón, cuatro luminarias y tres bancos de hormigón. Se redacta este anteproyecto con el fin de dar las ideas básicas de lo que podría ser en un futuro un proyecto más amplio de la rehabilitación y mejora del parque municipal de “San Diego”. La propuesta conllevará la incorporación de nueva vegetación adaptada a la climatología del lugar, con Ulmus minor seguido de Schinus molle como especies dominantes, así como vegetación autóctona tipo Dracaena draco o como exótica tipo Strelitzia juncea, desde árboles que actúen como cortaviento, barrera acústica y aporten mayor grado de seguridad y confort a los visitantes, entre otras, hasta arbustos o herbáceas que contribuyan al color y relieve del paisaje. Se propone cerramiento alrededor de todo el parque, mayor iluminación, riego, pavimento tipo asfáltico, hormigón impreso y caucho, sistemas de evacuación de aguas y emplazamiento de nuevo mobiliario urbano, ya que el parque carece de todo ello. El tema de diseño seleccionado está basado principalmente en un diseño funcional con zonas que ofrecen diferentes actividades como pueden ser espacios dedicados al descanso, parques infantiles, zona de psicomotricidad, parque canino y zona de picnic, satisfaciendo a todos los usuarios que visiten el parque. El nuevo diseño para el Parque “San Diego en este anteproyecto asciende al Presupuesto General de la cantidad expresada de 424.689,25 €

Design of a Free Water Surface Table to be Used as an Analogy to Two-Dimensional Compressible Gas Flow

Mechanical Engineerin

BMI and low bone mass in an elderly male nursing home population

Little is known about osteoporosis in institutionalized older adults. Risk factors such as low body mass index (BMI) have been investigated in female populations, but remain understudied in men. The objective of this study was to examine characteristics of older men residing in a nursing home who received bone mineral density evaluations. 57 male Miami Veterans Affairs Medical Center (VAMC) nursing home residents were screened for osteoporosis using a peripheral dual X-ray (pDXA) technique. T-scores were categorized into three groups: normal (0 > -1); osteopenic (-1 to -2.49); osteoporotic (< -2.5). Average age was 76.2 years (standard deviation = 11.5; range: 48-100). T-scores indicated that 37.3% of the population was normal, 35.6% osteopenic, and 27.1% osteoporotic. 35.6% of patients had normal BMIs, 3.4% were underweight, 47.5% were overweight, and 13.6% were considered obese. There was a high prevalence of overweight and obese individuals (61.1%) in the osteopenic and osteoporotic groups. As expected, there was a high prevalence of low bone mass in our population (62%). However, overweight and obese men were more likely to have osteoporosis and osteopenia, contrary to literature and clinical knowledge. This finding may be partially explained by the prevalence of sedentary lifestyle and relative lack of weight-bearing activity in this group of men