Efectos de los fallos en la compra ‘online’ sobre la satisfacción con la página web: análisis de las distintas respuestas según las características demográficas del consumidor

La insatisfacción del consumidor tras experimentar un fallo en la compra online es el principal motivo de pérdida de clientes en Internet. No obstante, no todos los consumidores reaccionan del mismo modo en estas situaciones. El objetivo del presente trabajo es la identificación de segmentos de consumidores según su distinta satisfacción con las compras en Internet, desde la doble perspectiva de haber experimentado un fallo en la compra o no. Sobre una muestra de 397 compradores online, los resultados de este estudio confirman que el efecto de los fallos en la compra sobre la satisfacción difiere según el sexo y la edad de los consumidores, lo que ofrece a las empresas que operan en Internet una valiosa información para desarrollar estrategias de segmentación efectivas. ---------- Consumer dissatisfaction after experiencing an online service failure is the main reason for customers abandoning online purchases. However, not all consumers respond to these situations in the same way. The aim of this study is to identify segments of consumers according to their different satisfaction with online shopping, from the dual perspective of having experienced or not, a service failure in the purchase. Results, from a sample of 397 online consumers, confirm that the effect of online service failures in consumer satisfaction differs based on consumers’ gender and age, providing valuable information for online retailers to effectively implement market segmentation strategies

Anàlisi i diagnosi ambiental de la dinàmica del porc senglar (Sus scrofa) al Parc del Garraf

El Parc del Garraf (PG) és una zona on laEl Parc del Garraf (PG) es una zona donde laParc del Garraf (PG) is an area where th

Ongoing Evolution in the Genus Crocus: Diversityof Flowering Strategies on the Way to Hysteranthy

[EN] Species of the genus Crocus are found over a wide range of climatic areas. In natural habitats, these geophytes diverge in the flowering strategies. This variability was assessed by analyzing the flowering traits of the Spanish collection of wild crocuses, preserved in the Bank of Plant Germplasm of Cuenca. Plants of the seven Spanish species were analyzed both in their natural environments (58 native populations) and in common garden experiments (112 accessions). Differences among species observed in the native habitats were maintained under uniform environmental conditions, suggesting a genetic basis for flowering mechanisms. Two eco-morphological types, autumn- and spring-flowering species, share similar patterns of floral induction and differentiation period in summer. The optimal temperature for this process was 23 degrees C for both types. Unlike Irano-Turanian crocuses, spring-flowering Spanish species do not require low winter temperatures for flower elongation. Hysteranthous crocuses flower in autumn prior to leaf elongation. We conclude that the variability in flowering traits in crocuses is related to the genetic and environmental regulation of flower primordia differentiation and elongation prior to emergence above the soil surface. The elucidation of the physiological differences between eco-morphological types of crocuses: synanthous with cold requirements and synanthous and hysteranthous without cold requirements, unlocks a new approach to the flowering evolution of geophytes in Mediterranean regions. Crocus species can serve both as a new model in the study of the molecular basis of hysteranthy and for the purposes of developing the molecular markers for desirable flowering traits.The collection activities of plant materials included in this study were mainly supported by successive Spanish research projects funded by the "Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria" [INIA RF2004-00032-C03, INIA RF2008-00012-C03, INIA RF2011-00005-C03], co-funded by the European Regional Development Fund (ERDF-FEDER), and also by means of the European Action 018 Agri Gen Res (CrocusBank). The activities of PhD. TPF were supported by a pre-doctoral grant from the "Instituto Nacional de Investigacion y Tecnologia Agraria y Alimentaria" within the framework of the project INIA RF2011-0005-C03-01. The preservation of these materials in the facilities of the Bank of Plant Germplasm of Cuenca (CIAF Albaladejito -IRIAF), as part of the Spanish Germplasm Collection of Saffron and other Crocus, is currently supported by the Spanish National Program for Conservation and Utilization of Plant Genetic Resources for Agriculture and Food (action INIA RFP2014-00012). Some activities have been also funded by the "Ministerio de Ciencia, Innovacion y Universidades de Espana" [AGL2016-77078-R].Pastor-Férriz, T.; De-Los-Mozos-Pascual, M.; Renau-Morata, B.; Nebauer, SG.; Sanchís, E.; Busconi, M.; Fernández, J.... (2021). Ongoing Evolution in the Genus Crocus: Diversityof Flowering Strategies on the Way to Hysteranthy. Plants. 10(3):1-18. https://doi.org/10.3390/plants1003047711810

Formation and emission properties of single InGaAs/GaAs quantum dots and pairs grown by droplet epitaxy

Trabajo presentado a la 30th International Conference on the Physics of Semiconductors, celebrada en Seul (Korea) del 25 al 30 de Julio de 2010.The emission properties of lateral and vertical QD pairs grown on GaAs nanoholes are investigated. Vertical QD pairs with different size asymmetry have been fabricated controlling the bottom QD size independently of the areal density. The emission of individual pairs is dominated by spectral diffusion effects and charge instabilities induced by the local charge environment. Lateral QD pairs have been fabricated on GaAs nanoholes and studied as a function of an electric field applied in the growth plane.Peer Reviewe

Cuidados de enfermería desde la experiencia de personas que padecen trastornos alimentarios: Un estudio cualitativo

Los Trastornos de la Conducta Alimentaria suponen uno de los problemas más prevalentes en la sociedad, siendo los cuidados prestados por las enfermeras fundamentales para su recuperación. Es por ello necesario comprender la experiencia y visión que tienen los pacientes de los cuidados que reciben, para poder adaptarse a sus necesidades. Este estudio cualitativo propone aproximarse a la vivencia de cuidados de pacientes que padecen trastornos alimentarios desde un enfoque fenomenológico hermenéutico. Diecinueve pacientes de Alcalá de Henares (Madrid) colaboraron en la investigación a través de entrevistas en profundidad y relatos, que fueron grabados, transcritos y analizados temáticamente. Los resultados se agruparon en cuatro categorías: 1. Una ayuda inesperada, 2. Buscar raíces: encontrar el origen, 3. Derribar barreras y construir contrafuertes, 4. Entender el significado del Trastorno Conducta Alimentaria. Para los pacientes, las enfermeras son una figura tanto inesperada como relevante, mostrando la importancia de los aspectos psicológicos y emocionales, sociales y personales como reguladores de su relación con la comida, la imagen y la vivencia de la corporeidad. A través del estudio, se profundiza en la relación de cuidados entre enfermera y paciente, obteniendo una perspectiva de cuidados desconocida, que posibilita ampliar el conocimiento e individualizar los cuidados prestados

The promoter activity of human Mfn2 depends on Sp1 in vascular smooth muscle cells

AIMS: Mitofusin-2 (Mfn2) expression is dysregulated in vascular proliferative disorders and its overexpression attenuates the proliferation of vascular smooth muscle cells (VSMCs) and neointimal lesion development after balloon angioplasty. We sought to gain insight into the mechanisms that control Mfn2 expression in VSMCs. METHODS AND RESULTS: We cloned and characterized 2 kb of the 5'-flanking region of the human Mfn2 gene. Its TATA-less promoter contains a CpG island. In keeping with this, 5'-rapid amplification of cDNA ends revealed six transcriptional start sites (TSSs), of which TSS2 and TSS5 were the most frequently used. The strong CpG island was found to be non-methylated under conditions characterized by large differences in Mfn2 gene expression. The proximal Mfn2 promoter contains six putative Sp1 motifs. Sp1 binds to the Mfn2 promoter and its overexpression activates the Mfn2 promoter in VSMCs. Chemical inhibition of Sp1 reduced Mfn2 expression, and Sp1 silencing reduced transcriptional activity of the Mfn2 promoter. In keeping with this view, Sp1 and Mfn2 mRNA levels were down-regulated in the aorta early after an atherogenic diet in apolipoprotein E-knockout mice or in VSMCs cultured in the presence of low serum. CONCLUSION: Sp1 is a key factor in maintaining basal Mfn2 transcription in VSMCs. Given the anti-proliferative actions of Mfn2, Sp1-induced Mfn2 transcription may represent a mechanism for prevention of VSMC proliferation and neointimal lesion and development

Diagnóstico del ictus por cocaína y sus complicaciones

Introducción. La cocaína es un factor de riesgo cerebrovascular independiente, tanto para eventos isquémicos como hemorrágicos, sobre todo entre los menores de 55 años. Caso clínico. A través de un caso clínico de ictus por consumo de cocaína, se revisa su fisiopatología y la complejidad en el manejo y diagnóstico de las complicaciones asociadas. Una de estas complicaciones descritas en relación con el consumo de cocaína es el vasoespasmo. Esta entidad comparte con otras entidades, como la hiperperfusión postisquémica precoz, los hallazgos en estudios ecográficos. Sin embargo, ambas presentan importantes diferencias en cuanto a tratamiento y pronóstico se refiere. Conclusiones. El consumo de cocaína se asocia con la enfermedad cerebrovascular a través de múltiples mecanismos, de los que se derivan diferentes complicaciones. Identificar estas complicaciones permite su correcto abordajeIntroduction. Cocaine is an independent cerebrovascular risk factor both for ischaemic and haemorrhagic events, above all among persons under 55 years of age. Case report. A case report of stroke due to the consumption of cocaine is used to review its pathophysiology and the complexity involved in the management and diagnosis of the associated complications. One of these complications reported in relation to the consumption of cocaine is vasospasm. This condition shares findings observed in ultrasound imaging studies with other conditions, such as early-onset post ischaemic hyperperfusion. Yet, there are important differences between the two as regards their treatment and prognosis. Conclusions. The consumption of cocaine is associated with cerebrovascular disease through a number of different mechanisms, which each give rise to different complications. By identifying these complications, correct management can be implemente

Impact of the implementation of best practice guidelines on nurse's evidence-based practice and on nurses' work environment: research protocol

Abstract Aim: To determine the impact of the Best Practice Spotlight Organization® initia- tive on nurses' perception of their work environment and their attitudes to evidence- based practice. Design: Quasi-experimental, multicentre study. The intervention is the participation in Best Prectice Spotilight Organizations to implement Best Practice Guidelines. Methods: The study will include seven centres in the interventional group and 10 in the non-equivalent control group, all of them belonging to the Spanish national health system. The Practice Environment Scale of the Nursing Work Index, and the Health Sciences Evidence-Based Practice Questionnaire will be administered to a sample of 1,572 nurses at the beginning of the programme and at 1 year. This 3-year study started in April 2018 and will continue until December 2021. Statistical analy- ses will be carried out using the SPSS 25.0. This project was approved by the Drug Research Ethics Committee of the Parc de Salut Mar and registered in Clinical Trials. Discussion: The study findings will show the current state of nurses' perception of their work environment and attitudes to evidence-based practice, and possible changes in these parameters due to the programme. Impact: The findings could provide a strong argument for health policymakers to scale up the Best Practice Spotlight Organization® initiative in the Spanish national health system

SIVA UAV: A Case Study for the EMC Analysis of Composite Air Vehicles

[EN] The increased use of carbon-fiber composites in unmanned aerial vehicles is a challenge for their EMC assessment by numerical solvers. For accurate and reliable simulations, numerical procedures should be tested not only for individual components, but also within the framework of complete systems. With this aim, this paper presents a benchmark test case based on experimental measurements coming from direct-current injection tests in the SIVA unmanned air vehicle, reproduced by a numerical finite-difference-time-domain solver that employs a new subgridding scheme to treat lossy composite thin panels. Validation was undertaken by applying the feature selective validation method, which quantifies the agreement between experimental and numerical data.This work was supported by the Projects TEC2013-48414C3-{ 1,2,3}-R, TEC2016-79214-C3-{1,2,3}-R, and TEC2015-68766-REDC (Spanish MINECO, EU FEDER), P12-TIC-1442 (J. de Andalucia, Spain), Alhambra-UGRFDTD (AIRBUS DS), and by the CSIRC alhambra.ugr.es supercomputing center.Cabello, MR.; Fernández, S.; Pous, M.; Pascual-Gil, E.; Angulo, LD.; López, P.; Riu, PJ.... (2017). SIVA UAV: A Case Study for the EMC Analysis of Composite Air Vehicles. IEEE Transactions on Electromagnetic Compatibility. 59(4):1103-1113. https://doi.org/10.1109/TEMC.2017.2648507S1103111359

Evaluación de la satisfacción del uso de las redes sociales en formación universitaria

El nuevo Espacio Europeo de Educación Superior necesita la incorporación de nuevos formatos y estrategias de enseñanza-aprendizaje relevantes, efectivas y de alta calidad. Las Redes Sociales ofrecen un gran potencial para la puesta en marcha de proyectos de innovación docente que nos permitan la adquisición de competencias y destrezas transferibles en los estudiantes. El objetivo de este trabajo es diseñar actividades docentes en las que se incorporen las Redes Sociales como herramienta de enseñanza-aprendizaje en la docencia universitaria y evaluar el grado de satisfacción del alumnado con este tipo de recursos. Ha participado en nuestro estudio una muestra disponible y significativa de estudiantes matriculados en dos asignaturas del Grado en Enfermería de Facultad de Ciencias de la Salud de la Universidad de Alicante. Se describen las actividades diseñadas y los resultados obtenidos sobre la satisfacción del estudiante con la incorporación de este tipo de metodología docente