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Strain-tunable Single Photon Sources in WSe2 Monolayers
Get PDFThe appearance of single photon sources in atomically thin semiconductors holds great promises for the development of a flexible and ultra-compact quantum technology, in which elastic strain engineering can
be used to tailor their emission properties. Here, we show a compact and hybrid 2D-semiconductorpiezoelectric device that allows for controlling the energy of single photons emitted by quantum emitters
localized in wrinkled WSe2 monolayers. We demonstrate that strain fields exerted by the piezoelectric device can be used to tune the energy of localized excitons in WSe2 up to 18 meV in a reversible manner,
while leaving the single photon purity unaffected over a wide range. Interestingly, we find that the magnitude and in particular the sign of the energy shift as a function of stress is emitter dependent. With the help of finite element simulations we suggest a simple model that explains our experimental observations and, furthermore, discloses that the type of strain (tensile or compressive) experienced by the quantum emitters strongly depends on their localization across the wrinkles. Our findings are of strong relevance for the practical implementation of single photon devices based on two-dimensional materials as well as for understanding the effects of strain on their emission properties
Estudio descriptivo de los errores más frecuentes en la técnica inhalatoria
Get PDFPatients with inhaled therapy have a high percentage of incorrect technique despite the importance of performing it properly.
Objective: To determine which are the most frequent errors in the self administration of inhaled therapy in our patients.
Methods: A descriptive study was conducted with a randomized sample of 60 patients. A face-to-face interview was carried out for the collection of data and errors in the technique by means of a check-list.
Results: 55% of the patients performed an incorrect technique. The most frequent errors were not to expel air pre-inspiration and not to perform apnea of more than 5 seconds. Adherence to inhaler therapy measured by the TAI was found to be good in 50% of patients and the noncompliance rate was 58.3%.
Conclusions: It is necessary to insist on the importance of very frequent errors. The need for re-education has been verified due to the poor performance of the technique by the patients. The most common type of noncompliance was the erratic, followed by the unconscious and the deliberate. In general, adherence to inhaler therapy is poor.Los pacientes con terapia inhalada tienen un alto porcentaje de técnica incorrecta pese a la importancia de realizarla adecuadamente.
Objetivo: Determinar cuáles son los errores más frecuentes en la autoadministración de terapia inhalada en nuestra población.
Métodos: Se realizó un estudio descriptivo con una muestra aleatorizada de 60 pacientes. Se llevó a cabo una entrevista presencial para la recogida de datos y de los errores en la técnica por medio de un check-list.
Resultados: El 55% de los pacientes realizaban una técnica incorrecta. Los errores más frecuentes fueron no expulsar aire pre-inspiración y no realizar apnea de más de 5 segundos. La adherencia al tratamiento con inhaladores medida por el Test de Adherencia a Inhaladores (TAI) resultó ser buena en un 50% de los pacientes y el porcentaje de incumplimiento fue de un 58’3%.
Conclusiones: Es necesario insistir en la importancia de errores muy frecuentes. Se ha constatado la necesidad de reeducación debido a la mala realización de la técnica por parte de los pacientes. El tipo de incumplimiento más habitual fue el errático, seguido del inconsciente y el deliberado. En general, la adherencia al tratamiento con inhaladores es escasa
Dejar de hacer para poder hacer. Compromiso por la calidad de las Sociedades Científicas
Get PDFThe recommendations “not to do” include unnecessary interventions with the current
evidences, not much sure, with high cost - efficiency or that spend a lot of time of the
sanitary professional that can dedicate to another activity.
A decade ago, the National Alliance of The United States started the project "Choosing
Wisely". Scientific companies of Familiar and Community Medicine, of Internal Medicine and
of Pediatrics elaborated a list with five recommendations which aim was to promote a major efficiency of the health resources related to requests of diagnostic tests and treatments.
Since then, many scientific associations have joined the project. In addition, the Institute NICE elaborates and updates the list " Do not do".
The Ministry of Health, Social Politics and Equality develops this national project, with the presence of 49 scientific companies.Las recomendaciones no hacer incluyen intervenciones innecesarias con las evidencias
actuales, poco seguras, con elevado coste-efectividad y que ocupan un tiempo al profesional
sanitario que puede dedicar a otra actividad.
Hace una década, la Alianza Nacional de Estados Unidos inició el proyecto “Choosing Wisely”.
Sociedades científicas de Medicina Familiar y Comunitaria, de Medicina Interna y de Pediatría elaboraron un listado con cinco recomendaciones cuyo objetivo era promover una mayor eficacia de los recursos de salud relacionados con peticiones de pruebas diagnósticas y tratamientos. Desde entonces, se han unido al proyecto muchas asociaciones científicas.
Además, el Instituto NICE elabora y actualiza la lista “Do not do”.
El Ministerio de Sanidad, Política Social e Igualdad desarrolla este proyecto a nivel nacional,contando con la presencia de 49 sociedades científicas
Selective photocatalytic oxidation of 5-hydroxymethyl-2-furfural in aqueous suspension of polymeric carbon nitride and its adduct with H2O2 in a solar pilot plant
Get PDFThis work reports a study on the reactivity of polymeric carbon nitride (PCN) and PCN-H2O2 adduct samples for sunlight photocatalytic selective oxidation reactions. The characterization of these materials was reported in a previous paper where the reactivity towards the partial oxidation of 5-hydroxymethylfurfural (HMF) was studied by using two different laboratory scale photoreactors; one irradiated by UV lamps and the other one by natural sunlight. In the present study it has been confirmed the effectiveness of these C3N4 based materials for the selective partial oxidation of HMF to FDC (2,5-furandicarboxaldehyde) in aqueous medium in a pilot plant photoreactor irradiated by natural sunlight. The reactivity results and, in particular, the selectivity to FDC formation have been very encouraging, mostly by considering that the reaction was carried out in water. Moreover, they are comparable with those obtained in the laboratory scale photoreactors irradiated by both UV lamps and natural sunlight. Interestingly, the pristine PCN sample has shown a higher HMF conversion with respect to that of the PCN-H2O2 adduct, but the last one is more selective to the FDC formation. A kinetic study indicates that the pseudo-first-order rate constant of HMF oxidation is higher in the case of pristine photocatalyst and that the equilibrium adsorption constants of HMF is higher in the case of PCN-H2O2 adduct catalyst. Finally, the partial oxidation of two aromatic alcohols, i.e. benzyl alcohol (BA) and 4-methoxy benzyl alcohol (4-MBA) to benzaldehyde (BAL) and 4-methoxy benzaldehyde (4-MBAL), respectively, has also been studied
Effect of Au nanoparticles on the activity of TiO2 for ethanol upgrading reactions
Get PDFThis article analyses the role of gold nanoparticles supported on TiO2 for the gas-phase ethanol condensation.
Previously, the original P25 surface was modified for increasing the Au-Ti interaction, in order to minimize the
thermal deactivation. Catalysts were tested both in absence and presence of hydrogen (523–673 K,
WHSV =7.9 h−1; yEtOH =0.32; yH2 =0-0.1; 0.1 MPa). Parent TiO2 is mainly selective for dehydration reactions
yielding diethyl ether (favoured at low temperatures) and ethylene (favoured at higher temperatures). The
presence of Au in the catalyst promotes dehydrogenation pathways, yielding acetaldehyde, as well as condensation
products (mainly butanol, with selectivities close to 10%). According to DRIFT spectroscopy results,
the strong ethanol adsorption on the TiO2 surface justifies the low yields and the high relevance of side-reactions
produced by inter- or intra- molecular dehydration routes (diethyl ether, and ethylene formation). The gold
addition minimizes this adsorption and enhances the main route by a double role: an improvement in the
dehydrogenation rate (yielding more acetaldehyde) and an enhancement in the hydrogenation steps.- Gobierno de España (CTQ14-52956-C3-1-R)
- Gobierno del Principado de Asturias (PA-14-PF-BP14-105)
- Gobierno de los Estados Unidos Mexicanos (CONACYT 291212
Investigación sobre el diseño biomédico adaptativo, la optimización topológica y el desarrollo de nuevos materiales y procesos de fabricación aditiva, para la generación de nuevas soluciones personalizadas de alto valor añadido en el sector salud. AMedico
Get PDFProyecto financiado dentro de la Convocatoria del Programa Asturias de ayudas a Centros Tecnológicos en el Principado de Asturias durante el período 2016-2017 de la Consejería de Empleo, Industria y Turismo, Nº de expediente: IDI/2016/00023
Puesta a punto del servicio para la determinación de hidrógeno difusible en metales ferríticos soldados por arco
Get PDFProyecto financiado dentro de la Convocatoria del Programa Asturias de ayudas a Centros Tecnológicos en el Principado de Asturias durante el periodo 2016-2017 de la Consejería de Empleo, Industria y Turismo. Nº de referencia IDI/2016/00029
¿Qué hay de nuevo para las/os enfermeras/os en la "Estrategia para el nuevo enfoque de la Atención Primaria"?
Get PDFEditorial de la Revista en la que se abordan las iniciativas y propuestas más destacables que afectan a las enfermeras dentro de ”Estrategia para el nuevo enfoque de la Atención Primaria”. Se trata de un documento elaborado y revisado por un grupo de trabajo formado por profesionales, personal técnico y Sociedades Científicas de Enfermería y de Medicina Familiar y Comunitaria así como la de Pediatría
