Nurses' perceptions of aids and obstacles to the provision of optimal end of life care in ICU

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Thin GaAsSb capping layers for improved performance of InAs/GaAs quantum dot solar cells

The use of thin GaAsSb capping layers (CLs) is demonstrated to provide InAs/GaAs quantum dot (QD) solar cells (SCs) with improved efficiencies up to 20%. The application of such CLs allows the tunability of the QD ground state, switching the QD-CL band alignment to type II for high Sb contents and extending the photoresponse up to 1.5 ?m. Moreover, the CL provides a significant contribution to the photocurrent. An improved carrier collection efficiency is also found to be a main reason behind the increase of the short-circuit current density, unveiling a negative impact of the wetting layer (WL) on carrier transport in standard InAs/GaAs QD SCs. Calculations from an 8×8 k·p method suggest the attribution of such an improvement to longer carrier lifetimes in the WL-CL structure due to the transition to a type-II band alignment in Sb-containing structures. A faster open-circuit voltage recovery under light concentration is demonstrated for high Sb content type-II QD-CL structures, leading, in turn, to faster efficiency improvements with light power

Effect of capping rate on InAs/GaAs quantum dot solar cells

The unavoidable presence of the wetting layer (WL) in Stranski-Krastanov quantum dots (QD) has typically a negative impact on the performance of QD solar cells. In this work, a simple method to engineer the WL of InAs/GaAs QD solar cells is investigated. In particular, we show that covering the QDs at high GaAs capping rates reduces In-Ga intermixing and, therefore, In redistribution from the QDs to the WL. This results not only in larger QDs, but also in thinner WLs, with larger quantum confinement energies and reduced potential barriers for electrons and holes. Carrier trapping by the WLs and subsequent recombination is therefore reduced, resulting in larger photocurrent values of the QD solar cells under short circuit conditions

Strain-balanced type-II superlattices for efficient multi-junction solar cells

Multi-junction solar cells made by assembling semiconductor materials with different bandgap energies have hold the record conversion efficiencies for many years and are currently approaching 50%. Theoretical efficiency limits make use of optimum designs with the right lattice constant-bandgap energy combination, which requires a 1.0–1.15eV material lattice-matched to GaAs/Ge. Nevertheless, the lack of suitable semiconductor materials is hindering the achievement of the predicted efficiencies, since the only candidates were up to now complex quaternary and quinary alloys with inherent epitaxial growth problems that degrade carrier dynamics. Here we show how the use of strain-balanced GaAsSb/GaAsN superlattices might solve this problem. We demonstrate that the spatial separation of Sb and N atoms avoids the ubiquitous growth problems and improves crystal quality. Moreover, these new structures allow for additional control of the effective bandgap through the period thickness and provide a type-II band alignment with long carrier lifetimes. All this leads to a strong enhancement of the external quantum efficiency under photovoltaic conditions with respect to bulk layers of equivalent thickness. Our results show that GaAsSb/GaAsN superlattices with short periods are the ideal (pseudo) material to be integrated in new GaAs/Ge-based multi-junction solar cells that could approach the theoretical efficiency limit

Storytelling como medio de comunicación en las aulas digitales

Se ha llevado a cabo una experiencia educativa sobre Digital Storytelling en la asignatura “Desarrollo Curricular y Aulas Digitales en Educación Infantil”, que forma parte del plan de estudios del Grado de Maestro en Educación Infantil de la Universidad de Alicante. El objetico general ha sido evaluar las posibilidades educativas del Digital Storytelling en la formación inicial docente y analizar las percepciones del alumnado sobre el mismo como recurso educativo, para lo cual hemos trabajado con 21 estudiantes, y se ha elaborado un cuestionario ad hoc para evaluar dicha experiencia. Como resultados, destaca que el 75,7% del alumnado afirmó estar bastante y totalmente de acuerdo en que pudo abordar un punto de vista personal sobre un tema de interés educativo en esta práctica, y el 61,9% identificó la actividad como motivadora y atractiva

Buscando Caperucitas

El trabajo obtuvo un premio de la modalidad A de los Premios Tomás García Verdejo a las buenas prácticas educativas en la Comunidad Autónoma de Extremadura para el curso académico 2012/2013Se describe la experiencia llevada a cabo por 4 centros educativos de la provincia de Cáceres, coordinados por el CEIP San Martín (Garganta la Olla, Cáceres), centro que propuso la actividad conjunta, en la que teniendo como eje central el cuento de Caperucita Roja y la obra de Bruno Munari 'Caperucita Roja, Verde, Amarilla, Azul y Blanca', se desarrollaron distintas iniciativas para trabajar la lectura, la escritura, la creación literaria y el mundo de los cuentosExtremaduraES

CAPPRIC Study—Characterization of Community-Acquired Pneumonia in Spanish Adults Managed in Primary Care Settings

The real burden of community-acquired pneumonia (CAP) in non-hospitalized patients is largely unknown. This is a 3-year prospective, observational study of ambulatory CAP in adults, conducted in 24 Spanish primary care centers between 2016–2019. Sociodemographic and clinical variables of patients with radiographically confirmed CAP were collected. Pneumococcal etiology was assessed using the Binax Now® test. Patients were followed up for 10 ± 3 days. A total of 456 CAP patients were included in the study. Mean age was 56.6 (±17.5) years, 53.5% were female, and 53.9% had ≥1 comorbidity. Average incidence of CAP was 1.2–3.5 cases per 1000 persons per year. Eighteen patients (3.9%) were classified as pneumococcal CAP. Cough was present in 88.1% of patients at diagnosis and fever in 70.8%. Increased pulmonary density (63.3%) and alveolar infiltrates with air bronchogram (16.6%) were the most common radiographic findings. After 14.6 ± 6.0 days (95% CI = 13.9–15.3), 65.4% of patients had recovered. Hospitalization rate was 2.8%. The most frequently prescribed antibiotics were quinolones (58.7%) and β-lactams (31.1%). In conclusion, one-third of CAP patients did not fully recover after two weeks of empiric antibiotic therapy and 2.8% required hospitalization, highlighting the significant burden associated with non-hospitalized CAP in Spain

La sala de relajación : un espacio para aprender a relajarse y controlar la conducta

Los alumnos de este centro son personas con Trastorno del Espectro Autista TEA y tienen dificultades, en determinadas situaciones, para relajarse y regular su conducta, así dificultan su desarrollo personal y su inclusión social. Por ello, el objetivo de este proyecto es crear un entorno con unos objetivos, contenidos, materiales y metodología que permita la adquisición de estas habilidades. Este objetivo no se limita sólo al centro sino que pretende desplazar esta conducta a los entornos significativos de las vidas de los alumnos, fomentando la inclusión y la independencia. Las actividades están relacionadas previamente con la formación en técnicas de relajación y respiración e integración sensorial y estimulación basal. Se pretende que el alumno localice espacialmente la sala de relajación; reconocer su esquema corporal; percibir sensaciones relajantes táctiles, vibratorias, auditivas o visuales; aprender a tolerar sensaciones y estímulos auditivos estresantes; percibir y controlar la capacidad respiratoria; reconocer y expresar estados emocionales propios y asociar percepciones corporales a estados emocionales propios. La metodología se basa en la propuesta de la AAMR (Asociación Americana de Retraso Mental) y se centra en desarrollar y mejorar competencias en las diez áreas de habilidades adaptativas que son desarrollo humano, educación-enseñanza, vida en el hogar, vida en la comunidad, empleo, salud-seguridad, conducta social, protección-defensa y comunicación. Estas áreas se desarrollan en tres ámbitos conceptuales, sociales y prácticos a través de aplicar los siguientes principios: funcionalidad, espontaneidad, generalización, individualización, aprendizaje significativo, motivación, estructuración, flexibilidad, integración y validez social. La evaluación se lleva a cabo con la creación de un fichero donde quedan recogidas las experiencias, materiales y actividades recopiladas a lo largo del curso y a través de reuniones periódicas se valoran los resultados. Los anexos muestran fotografías con algunos de los ejercicios desarrollados..Madrid (Comunidad Autónoma). Consejería de Educación. Dirección General de Mejora de la Calidad de la EnseñanzaMadridMadrid (Comunidad Autónoma). Subdirección General de Formación del Profesorado. CRIF Las Acacias; General Ricardos 179 - 28025 Madrid; Tel. + 34915250893ES

CAPPRIC Study-Characterization of Community-Acquired Pneumonia in Spanish Adults Managed in Primary Care Settings.

The real burden of community-acquired pneumonia (CAP) in non-hospitalized patients is largely unknown. This is a 3-year prospective, observational study of ambulatory CAP in adults, conducted in 24 Spanish primary care centers between 2016-2019. Sociodemographic and clinical variables of patients with radiographically confirmed CAP were collected. Pneumococcal etiology was assessed using the Binax Now® test. Patients were followed up for 10 ± 3 days. A total of 456 CAP patients were included in the study. Mean age was 56.6 (±17.5) years, 53.5% were female, and 53.9% had ≥1 comorbidity. Average incidence of CAP was 1.2-3.5 cases per 1000 persons per year. Eighteen patients (3.9%) were classified as pneumococcal CAP. Cough was present in 88.1% of patients at diagnosis and fever in 70.8%. Increased pulmonary density (63.3%) and alveolar infiltrates with air bronchogram (16.6%) were the most common radiographic findings. After 14.6 ± 6.0 days (95% CI = 13.9-15.3), 65.4% of patients had recovered. Hospitalization rate was 2.8%. The most frequently prescribed antibiotics were quinolones (58.7%) and β-lactams (31.1%). In conclusion, one-third of CAP patients did not fully recover after two weeks of empiric antibiotic therapy and 2.8% required hospitalization, highlighting the significant burden associated with non-hospitalized CAP in Spain