70 research outputs found

    Applications of regular variation and proximate orders to ultraholomorphic classes: asymptotic expansions and multisummability

    Get PDF
    El principal objetivo de esta memoria es dar respuesta a varias preguntas abiertas relativas a las clases ultraholomorfas de tipo Carleman-Roumieu de funciones, definidas en sectores de la superficie de Riemann del logaritmo mediante restricciones para el crecimiento de sus derivadas dadas en términos de una sucesión de números reales positivos. La principal motivación para este estudio es el análisis de las condiciones que permiten extender a estas clases el proceso de (multi)sumabilidad de series de potencias formales desarrollado por J. Écalle, J.-P. Ramis y W. Balser. Se ha profundizado significativamente en el conocimiento acerca de la inyectividad y la sobreyectividad de la aplicación de Borel, se han caracterizado las sucesiones para cuyas clases ultraholomorfas asociadas está disponible una extensión satisfactoria de la herramienta de k-sumabilidad y se ha presentado un método de multisumabilidad. La solución depende fuertemente de las teorías clásicas de variación regular y de órdenes aproximados.Departamento de Algebra, Geometría y TopologíaDoctorado en Matemática

    Transformadas de Laplace y Borel generalizadas para funciones asociadas a un orden aproximado

    Get PDF
    El objetivo de esta memoria es la presentación de una generalización de los teoremas clásicos de Polya y Martineau-Ehrenpreis, relativos a la transformada de Borel-Laplace de una función de crecimiento exponencial y su prolongación analítica, al contexto de las funciones enteras cuyo crecimiento está gobernado por un orden aproximado. Ha sido necesario estudiar las teorías de los conjuntos p-convexos y de las funciones trigonométricamente p-convexas, resultados relativos al crecimiento de las funciones enteras, y las transformadas de Laplace y Borel en un contexto general.Álgebra, Análisis Matemático, Geometría y TopologíaMáster en Investigación en Matemática

    Equality of ultradifferentiable classes by means of indices of mixed o-regular variation

    Get PDF
    Producción CientíficaWe characterize the equality between ultradifferentiable function classes defined in terms of abstractly given weight matrices and in terms of the corresponding matrix of associated weight functions by using new growth indices. These indices, defined by means of weight sequences and (associated) weight functions, are extending the notion of O-regular variation to a mixed setting. Hence we are extending the known comparison results concerning classes defined in terms of a single weight sequence and of a single weight function and give also these statements an interpretation expressed in O-regular variation.Ministerio de Ciencia e Innovación (project PID2019-105621GB-I00)FWF (project P 33417-N)Publicación en abierto financiada por el Consorcio de Bibliotecas Universitarias de Castilla y León (BUCLE), con cargo al Programa Operativo 2014ES16RFOP009 FEDER 2014-2020 DE CASTILLA Y LEÓN, Actuación:20007-CL - Apoyo Consorcio BUCL

    Surjectivity of the asymptotic Borel map in Carleman-Roumieu ultraholomorphic classes defined by regular sequences

    Get PDF
    We study the surjectivity of, and the existence of right inverses for, the asymptotic Borel map in Carleman?Roumieu ultraholomorphic classes defined by regular sequences in the sense of E. M. Dyn?kin. We extend previous results by J. Schmets and M. Valdivia, by V. Thilliez, and by the authors, and show the prominent role played by an index, associated with the sequence, that was introduced by V. Thilliez. The techniques involve regular variation, integral transforms and characterization results of A. Debrouwere in a half-plane, stemming from his study of the surjectivity of the moment mapping in general Gelfand?Shilov spaces.The first two authors are partially supported by the Spanish Ministry of Economy, Industry and Competitiveness under the project MTM2016-77642-C2-1-P, and by the Spanish Ministry of Science and Innovation under the project PID2019-105621GB-I00. The third author is supported by FWF-Projects P32905- N and P33417-

    El cómic como soporte del emplazamiento de productos : el caso de las editoriales Marvel y DC

    Get PDF
    El objetivo de la comunicación es descubrir las formas de representación del emplazamiento de productos (product placement) en el cómic actual, comparando los resultados con el uso que, desde hace años, se viene realizando en otros medios publicitarios convencionales, como el cine o la televisión. Para ello, se han seleccionado varias colecciones de éxito (Amazing Spider-Man, Rush City, New X-Men…) de las dos editoriales estadounidenses más importantes del sector (Marvel y DC). Aplicando la metodología del análisis de contenido, observamos las formas tipo de utilización del recurso (mención, pasivo, activo, etc.) y las particularidades en su aplicación al medio cómic. Como resultados, destacamos un uso aún limitado o incipiente del emplazamiento de productos en el cómic, sobre todo en comparación con, por ejemplo, las series televisivas de consumo efímero. El caso más representativo es el de la editorial Marvel, con acuerdos de emplazamiento con marcas tan relevante como Sony, Schwinn, Nike o Dodge, que les permite llegar a un target especialmente esquivo en la planificación de medios, a saber, jóvenes de entre veinte y treinta años frecuentadores de medios no convencionales e integrados en grupos sociales micro. En suma, el cómic se presenta como un soporte adecuado para el emplazamiento de productos, si bien requiere de un afinado estudio de cada uno de los emplazamientos con objeto de no ahuyentar a una audiencia muy sensible al contenido del medio, todo lo contrario de lo que sucede con otros medios convencionales, como la televisión o el cine, en los que goza de amplia aceptación.This paper aims to determine the forms product placements adopt within current comics magazines, through comparison of the findings with the uses of this strategy on more traditional advertising media, such as films and television. For that purpose, the authors have chosen a number of the most popular titles (Amazing Spider-Man, Rush City, New X-Men…) published by the two foremost American comic book companies (Marvel and DC.) by means of the content analysis methodology, the authors have studied the use of different types of product placement (naming, passive, active…) as well as their particular applications to the comics medium. One of the most important findings is that the use of product placement on comic books is still limited and incipient, especially if compared with TV series of short-lived consumption, for instance. The most illustrative case is that of the Marvel publishing company, which has closed product placement deals with such relevant brands as Sony, Schwinn, Nike or Dodge, enabling them to reach the particularly elusive target audience whose age range falls into the 20-30 group, frequenters of alternative media and integrated into microsocial groups. In short, comics appear as a suitable context of product placement, even though each instance of application must be finely tuned so as not to repel a kind of audience which is more sensitive to contents than that of more mainstream media such as television or films, on which the embedding of products and brand names is commonplace

    Long-term clinical efficacy of implants with internal connection and sandblasted-acid-etched surface.

    Get PDF
    Introducción. La implantología oral representa una opción importante en el tratamiento de los pacientes con pérdida dental total y parcial. El estudio a largo plazo muestra la evaluación de los pacientes tratados mediante carga precoz de implantes con conexión interna y superficie arenada y grabada. Métodos. 40 pacientes con pérdidas dentales fueron tratados con implantes Frontier GMI ® con conexión interna y superficie arenada y grabada. Los implantes fueron cargados tras un periodo de tiempo de 6 semanas en la mandíbula y 8 semanas en el maxilar superior. Los hallazgos clínicos (implantológicos y prostodóncicos) se han seguido durante al menos 6 años. Resultados. 103 implantes fueron insertados en ambos maxilares, 46 implantes (44,7%) en el maxilar superior y 57 implantes (55,3%) en la mandíbula, para su rehabilitación prostodóncica. 37 implantes (35,9%) fueron insertados en el sector anterior y 66 implantes (64,1%) en el sector posterior. 70 implantes (68%) de forma sumergida (2 cirugías) y 33 implantes (32%) de forma no sumergida (una cirugía). Des pués de un seguimiento clínico de 92,2 meses, los resultados indican una supervivencia de los implantes del 96,2%; ya que se perdieron 4 implantes. La pérdida ósea marginal fué de 0,99 ± 0,84 mm. Las restau raciones prostodóncicas incluyeron 31 coronas unitarias, 15 puentes fijos, 5 sobredentaduras con bolas, 2 rehabilitaciones totales fijas y una rehabilitación completa híbrida. Las complicaciones tardías fueron 11 implantes (10,7%) con periimplantitis y 6 prótesis (11,1%) con complicaciones protésicas. Conclusiones. Los hallazgos clínicos del estudio indican que el tratamiento con carga precoz mediante prótesis de los implantes con conexión interna y superficie arenada y grabada, representa una terapéutica odontológica con éxito.Introduction. Implant dentistry constitute an important option in the prosthodontic treatment of patients with partial and total tooth loss. This long-term study reports the evaluation of patients treated by early loading of implants with internal connection and sandblasted-acidetched surface. Methods. 40 patients with tooth loss were treated with Frontier GMI ® sandblasted and acid-etched surfa ce implants. Implants were loaded after a healing free-loading period of 6 weeks (mandible) and 8 weeks (maxilla). Clinical findings (implants and prosthodontics) were followed during at least 6 years. Results. 103 implants were inserted (46 maxillary (44.7%), and 57 mandibular (55.3%)) for prosthodontic rehabilitation. 37 implants (35.9%) were inserted in anterior sites and 66 implant (64.1%) in posterior sites. Seventy implants (68%) were placed submerged (two stages) while that 33 implants (32%) were placed nonsubmerged (one stage). After at a mean follow-up of 92.2 months, clinical results indicate a survival rate of implants of 96.2%. Four implants were lost during the treatment. Mean marginal bone loss were 0.99 ± 0.84 mm. Prosthodontic restorations included 31 single crowns, 15 fixed bridges, 5 overdentures, 2 fixed totally rehabilitation and an hybrid full rehabilitation. Delayed complications include 11 implants (10.7%) with peri-implantitis and 6 prostheses (11.1%) with technical complications. Conclusions. Clinical results of this study indicate that prosthodontic rehabilitation by early loading of internal connection and sandblasted and etched- implants can be a successful dental treatment

    IAA : Información y actualidad astronómica (25)

    Get PDF
    Sumario : La química del Universo y el origen de la vida.-- Vida humana en el espacio.-- HISTORIAS DE ASTRONOMÍA: Desmenuzando la materia.-- Examen final al Modelo Estándar de Partículas.-- CIENCIA: PILARES E INCERTIDUMBRES : Evolución del análisis armónico.-- DECONSTRUCCIÓN Y otros ENSAYOS : Las distintas escalas de un agujero negro.-- ACTUALIDAD.-- ENTRE BASTIDORES.-- ACTIVIDADES IAA .Esta revista se publica con la ayuda FCT-08-0130 del Programa Nacional de Fomento de la Cultura Científica y Tecnológica 2008.N

    Brain connectivity and cognitive functioning in individuals six months after multiorgan failure

    Get PDF
    Abstract Multiorgan failure (MOF) is a life-threating condition that affects two or more systems of organs not involved in the disorder that motivates admission to an Intensive Care Unit (ICU). Patients who survive MOF frequently present long-term functional, neurological, cognitive, and psychiatric sequelae. However, the changes to the brain that explain such symptoms remain unclear. OBJECTIVE: To determine brain connectivity and cognitive functioning differences between a group of MOF patients six months after ICU discharge and healthy controls (HC). METHODS: 22 MOF patients and 22 HC matched by age, sex, and years of education were recruited. Both groups were administered a 3T magnetic resonance imaging (MRI), including structural T1 and functional BOLD, as well as a comprehensive neuropsychological evaluation that included tests of learning and memory, speed of information processing and attention, executive function, visual constructional abilities, and language. Voxel-based morphometry was used to analyses T1 images. For the functional data at rest, functional connectivity (FC) analyses were performed. RESULTS: There were no significant differences in structural imaging and neuropsychological performance between groups, even though patients with MOF performed worse in all the cognitive tests. Functional neuroimaging in the default mode network (DMN) showed hyper-connectivity towards sensory-motor, cerebellum, and visual networks. DMN connectivity had a significant association with the severity of MOF during ICU stay and with the neuropsychological scores in tests of attention and visual constructional abilities. CONCLUSIONS: In MOF patients without structural brain injury, DMN connectivity six months after ICU discharge is associated with MOF severity and neuropsychological impairment, which supports the use of resting-state functional MRI as a potential tool to predict the onset of long-term cognitive deficits in these patients.Similar to what occurs at the onset of other pathologies, the observed hyper-connectivity might suggest network re-adaptation following MOF.This research was founded by Ministerio Economia, Industria y Competitividad, Spain and FEDER (grant no. DPI2016-79874-R) to JC and JCAL. ID's time was founded by the Department of Education of the Basque Country, postdoctoral program. JR's time was founded by the Ministry of Education, Language Policy and Culture (Basque Government). JMC's time was founded by Ikerbasque and the Department of Economic Development and Infrastructure of the Basque Country, Elkartek Program (grant no. KK-2018/00032). JCAL's time was founded by Ikerbasque and Fundacion Mutua Madrilena (grant no. AP169812018). IG's time was founded by the Instituto de Salud Carlos III for a Juan Rodes (grant no. JR15/00008) co-funded by the European Regional Development Fund/European Social Fund 'Investing in Your Future'. AJM's time was partly founded by Euskampus Fundazioa
    corecore