El tablón de las mates

En esta comunicación queremos dar a conocer el trabajo que llevamos varios años desarrollando en nuestro centro para dar a conocer y estimular el conocimiento matemático entre nuestro alumnado. De esta idea surgió “el tablón de las mates”, un tablón donde, semanalmente, exponemos varios problemas de ingenio, matemáticos o matemáticas famosos que hay que descubrir, curiosidades, concursos, etc

Matemáticas recreativas

En este zoco pretendemos exponer el trabajo que hemos desarrollado en nuestro centro en los últimos cursos, tanto el elaborado por nosotras como profesoras, como el que han llevado a cabo nuestros alumnos y alumnas. Así, presentamos muestras de problemas de ingenio, pistas para descubrir matemáticos o matemáticas famosos, collage de matemáticos ilustres, tarjetas matemáticas navideñas, matemáticas relacionadas con nuestra vida cotidiana y una muestra de las fotografías presentadas para la última edición de nuestro concurso

Continuous Positive Airway Pressure Treatment in Patients with Alzheimer's Disease: A Systematic Review

Background: Epidemiological studies have suggested a pathophysiological relationship between obstructive sleep apnea syndrome (OSAS) and Alzheimer's disease (AD). The aim of this study is to evaluate the treatment of obstructive sleep apnea with continuous positive airway pressure (CPAP) in AD and its relationship with neurocognitive function improvement. Methods: Systematic review conducted following PRISMA's statements. Relevant studies were searched in MEDLINE, PEDro, SCOPUS, PsycINFO, Web of Science, CINAHL and SportDicus. Original studies in which CPAP treatment was developel in AD patients have been included. Results: 5 studies, 3 RCTs (Randomized controlled trials) and 2 pilot studies. In all RCTs the CPAP intervention was six weeks; 3 weeks of therapeutic CPAP vs. 3 weeks placebo CPAP (pCPAP) followed by 3 weeks tCPAP in patients with AD and OSA. The two pilot studies conducted a follow-up in which the impact on cognitive impairment was measured. Conclusions: CPAP treatment in AD patients decreases excessive daytime sleepiness and improves sleep quality. There are indications that cognitive deterioration function measured with the Mini Mental Scale decreases or evolves to a lesser extent in Alzheimer's patients treated with CPAP. Caregivers observe stabilization in disease progression with integration of CPAP. More research is needed on the topic presented

Percepción de riesgo en alumnos de enfermería

The objective of this study is to analyze the scientific production that exists about the relationship between the risk perception and the accidents during the clinical practice in nursing students. A systematic search was carried out in the data bases MEDLINE and CUIDEN, and also in the documentary heritage of the National Institute of Safety and Hygiene at Work, gathering publications from 1992 to 2010. A total of 89 articles were analyzed. Among the resulting thematic fields are: work setting, step measurements, psychosocial factors. As a conclusion, a lack of studies which prove in an explicit way the role that the real risk perception that the nursing students are exposed to exists. So, the necessity to go on in this line is set out, in order to improve the safety of nursing studentsEl objetivo de este estudio, es analizar la producción científica que existe sobre la relación entre la percepción de riesgo y los accidentes en la práctica clínica en alumnos/as de Enfermería. Se realizó una búsqueda sistemática en las bases de datos MEDLINE y CUIDEN, así como en el fondo documental del Instituto Nacional de Seguridad e Higiene en el Trabajo, recopilando publicaciones comprendidas entre 1992 y 2010. Se analizaron un total  de 89 artículos. Entre los campos temáticos emergentes se encuentran: entorno laboral, medidas preventivas, factores psicosociales. Se llega a la conclusión de que existe una carencia de estudios que demuestren de forma explícita el papel que la percepción de riesgo juega en el riesgo real al que los alumnos de enfermería se ven expuestos, por lo que se plantea la necesidad de investigar en esta línea, para así poder mejorar la seguridad  de los alumnos de enfermería

Matemáticas recreativas

En este artículo queremos dar a conocer el trabajo que llevamos varios años desarrollando en nuestro centro para dar a conocer y estimular el conocimiento matemático entre nuestro alumnado. De esta idea surgió “El tablón de las Mates”, un tablón donde, de forma quincenal, exponemos varios problemas de ingenio, matemáticos o matemáticas famosos que hay que descubrir, curiosidades, concursos, etc

Facilitating Accessibility: A Study on Innovative Didactic Materials to Generate Emotional Interactions with Pictorial Art

This research has been undertaken to establish criteria for the construction of didactic materials to be experienced through touch (using a three-dimensional model) and hearing (through the provision of an audio description of the chosen painting) to provide learning and emotions. Eleven experts examined the didactic tools in which the scene of the painting had been depicted, through the use of white plastic figures modeled using a 3D printer. The models had been positioned to accurately correspond with the reference painting, with an explanatory narration supplied as an audio recording. Each of the experts involved were asked the same open questions in interviews that were audio-recorded and later transcribed. This feedback was analyzed and eleven concerns for consideration were determined: 1. How the figures felt to touch 2. Modeling and placement of the figure, 3. Position of the character, 4. Size, 5. The accurate 3D depiction of the 2D image, 6. Perspectives or visual points of view of the scene, 7. Enough representation of the painting in the model, 8. Distribution of visual components within the scene, 9. Perceptual appraisals, 10. Size of the model, 11. Touch of the whole model. The results indicated that the size of the model and the figurines was appropriate for their function. The figurines felt pleasant to handle and adequately described the postures and placement. Suggestions for further improvements were including more figurines in the model and adding color (omitted in the test model) to belong an inclusive design

Spark Plasma Sintered Zirconia Ceramic Composites with Graphene-Based Nanostructures

The addition of graphene-based nanostructures (GBNs) can improve the inherent fragility of ceramics and provide them with improved electrical and thermal conductivities. However, both the starting material (ceramic matrix and GBNs) and the processing/sintering approach are crucial for the final composite microstructure and properties. This work focuses on the influence of the content and dimensions of the GBN filler (10 and 20 vol%; 3 and ~150 layers), the powder-processing conditions (dry versus wet), and the homogenization method (ultrasound sonication versus high-energy planetary ball milling) on GBN/tetragonal zirconia (3YTZP) composites. The microstructure and electrical properties of the spark plasma sintered (SPS) composites were quantified and analyzed. The highest microstructural homogeneity with an isotropic microstructure was achieved by composites prepared with thicker GBNs milled in dry conditions. A high content (20 vol%) of few-layered graphene as a filler maximizes the electrical conductivity of the composites, although it hinders their densification.Ministerio de Economía y Competitividad MAT2015-67889-P

Optimizing the homogenization technique for graphene nanoplatelet/yttria tetragonal zirconia composites: Influence on the microstructure and the electrical conductivity

3 mol% yttria tetragonal zirconia polycrystalline (3YTZP) ceramic composite powders with 10 vol% nominal content of graphene nanoplatelets (GNPs) were prepared using four different homogenization routines: dispersion of the powder mixture by ultrasonication in isopropyl alcohol, homogenization in a high-energy planetary ball mill in wet or dry conditions after ultrasonication, and milling of the powders in a high-energy planetary ball mill in dry conditions. A significant effect of the homogenization routine on the powders particle size distribution was revealed by laser granulometry and Raman spectroscopy. Highly densified composites were obtained after spark plasma sintering (SPS) and remarkable differences on the GNP size, shape and distribution throughout the ceramic matrix and also in the electrical conductivity were observed in the four different composites. The composite with the best performance in terms of electrical conductivity was the one prepared after planetary ball milling of the powders in dry conditions as a consequence of the reduced dimensions of the GNPs and their excellent distribution throughout the ceramic matrix.Ministerio de Economía y Competitividad MAT2015-67889-

Understanding the role of open metal sites in MOFs for the efficient separation of benzene/cyclohexane mixtures

Separating C6 cyclic hydrocarbons, specifically benzene and cyclohexane, presents a significant industrial challenge due to their similar physicochemical properties. We conducted Monte Carlo simulations in the Grand-Canonical ensemble to acquire adsorption properties and separation performance data for benzene and cyclohexane in three metal–organic frameworks featuring coordinatively unsaturated metal sites (Ni-MOF-74, Ni-ClBBTA, and Ni-ClBTDD). The separation performance of these MOFs was analyzed and compared with literature data for adsorbents of different natures, demonstrating superior performance. Additionally, we explored the molecular origins of this effective separation, examining the pore-filling mechanism, interaction of guest molecules with metal centers, and mutual interactions of each adsorbate. Our results highlight that the selected adsorbents, with remarkable loading capacity, can efficiently separate both compounds in a mixture with exceptional effectiveness.</p

Large-Scale Analysis of User Exposure to Online Advertising on Facebook

Online advertising is the major source of income for a large portion of the Internet Services. There exists a body of literature aiming at optimizing ads engagement, understanding the privacy and ethical implications of online advertising, and so on. However, to the best of our knowledge, no previous work analyzes, at large scale, the exposure of real users to online advertising. This paper performs a comprehensive analysis of the exposure of users to ads and advertisers using a dataset, including more than 7M ads from 140k unique advertisers delivered to more than 5k users, which was collected between October 2016 and May 2018. This paper focuses on Facebook, which is the second largest advertising platform next only to Google in terms of revenue and accounts for more than 2.2B monthly active users. Our analysis reveals that the Facebook users are exposed (in median) to 70 ads per week, which comes from 12 advertisers. Ads represent between 10% and 15% of all the information received in the users' newsfeed. A small increment of 1% in the portion of ads in the newsfeed could roughly represent a revenue increase of 8.17M USD per week for Facebook. Finally, we also reveal that the Facebook users are overprofiled since, in the best case, only 23% of the active interests, Facebook assigns to users for the advertising purpose, are actually related to the ads these users receive.The work of A. A. Galán and R. C. Rumin was supported by the European H2020 Project SMOOTH under Grant 786741. The work of J. G. Cabañas was supported in part by the Ministerio de Economía, Industria y Competitividad, Spain, through the Project TEXEO, under Grant TEC2016-80339-R, and in part by the Ministerio de Educación, Cultura y Deporte, Spain, through FPU, under Grant FPU16/05852. The work of A. Cuevas was supported in part by the Ministerio de Economía, Industria y Competitividad, Spain, and in part by the European Social Fund (EU), through the Ramón Y Cajal, under Grant RyC-2015-17732. The work of M. Calderón was supported by the European H2020 Project TYPES under Grant 653449.Publicad