La influencia del enunciado en la resolución de problemas de m.c.d. y m.c.m. de estudiantes para maestro

En esta comunicación se presentan resultados de una investigación con estudiantes para maestro sobre la resolución de problemas verbales ligados a los conceptos de máximo común divisor (m.c.d.) y mínimo común múltiplo (m.c.m). Los principales objetivos de la investigación eran evaluar la competencia de los estudiantes en la resolución de este tipo de problemas y analizar la influencia en el proceso de resolución de la presencia en el enunciado de palabras clave. La comunicación se centra en una dificultad que presentan los estudiantes a la hora de decidir entre el m.c.d. y el m.c.m. en la resolución de problemas verbales. En este sentido, resultados, tanto cuantitativos como cualitativos, apuntan a que el origen de la dificultad podría deberse a que los estudiantes no involucran las ideas de múltiplo y divisor en la resolución, sino que se guían por las palabras clave del enunciado para desencadenar el cálculo algorítmico del m.c.d. o del m.c.m

Assessment of the presence of mathematics processes Standards in an arithmetic problem solving activity

Desde que el NCTM (2000) los incorporó en sus Principios y Estándares para la Educación Matemática con el fin de promover una mayor competencia matemática en el alumnado, los estándares de proceso han cobrado un protagonismo cada vez mayor. La adopción de un enfoque competencial que promueva su presencia en educación matemática infantil requiere de indicadores que permitan evaluar y analizar su tratamiento. Se presenta un análisis de la presencia de los estándares de proceso en una práctica docente con niños de 5 años diseñada en torno a un problema aritmético para el que se ha empleado el instrumento de evaluación propuesto por Alsina y Coronata (2014).Since Process Standards were introduced by the NCTM (2000) in the Principles and Standards for School Mathematics to promote greater mathematical competence in students, their relevance has grown. A competency- based approach in Early Childhood Mathematics incorporating the Process Standards requires indicators to assess and analyze their treatment. We analyze the presence of the Process Standards in a teaching activity with 5 years- old children on solving an arithmetic problem. We use the assessment tool proposed by Alsina and Coronata (2014).S

Evaluación de los procesos matemáticos en la resolución de un problema aritmético

Desde que el NCTM (2000) los incorporó en sus Principios y Estándares para la Educación Matemática con el fin de promover una mayor competencia matemática en el alumnado, los estándares de proceso han cobrado un protagonismo cada vez mayor. La adopción de un enfoque competencial que promueva su presencia en educación matemática infantil requiere de indicadores que permitan evaluar y analizar su tratamiento. Se presenta un análisis de la presencia de los estándares de proceso en una práctica docente con niños de 5 años diseñada en torno a un problema aritmético para el que se ha empleado el instrumento de evaluación propuesto por Alsina y Coronata (2014)

Evaluación de los procesos matemáticos en la resolución de un problema aritmético

Since Process Standards were introduced by the NCTM (2000) in the Principles and Standards for School Mathematics to promote greater mathematical competence in students, their relevance has grown. A competency-based approach in Early Childhood Mathematics incorporating the Process Standards requires indicators to assess and analyze their treatment. We analyze the presence of the Process Standards in a teaching activity with 5 years-old children on solving an arithmetic problem. We use the assessment tool proposed by Alsina and Coronata (2014).Desde que el NCTM (2000) los incorporó en sus Principios y Estándares para la Educación Matemática con el fin de promover una mayor competencia matemática en el alumnado, los estándares de proceso han cobrado un protagonismo cada vez mayor. La adopción de un enfoque competencial que promueva su presencia en educación matemática infantil requiere de indicadores que permitan evaluar y analizar su tratamiento. Se presenta un análisis de la presencia de los estándares de proceso en una práctica docente con niños de 5 años diseñada en torno a un problema aritmético para el que se ha empleado el instrumento de evaluación propuesto por Alsina y Coronata (2014)

Uracil grafted imine-based covalent organic framework for nucleobase recognition

An imine-based covalent organic framework (COF) decorated in its cavities with uracil groups has shown selective recognition towards adenine in water. These results show how the confinement of the base-pair inside the COF's pores allows a remarkable selective recognition in aqueous mediaThis work was financially supported by MINECO (MAT2016-77608-C3-1-P and 2-P, SAF2017-87305-R). IMDEA Nanociencia acknowledges support from the ‘Severo Ochoa’ Programme for Centres of Excellence in R&D (MINECO, Grant SEV-2016-0686). Funding from the European Research Council (ERC-StG 279548) and MINECO (CTQ2014-27729-P and CTQ2017-84727-P) is gratefully acknowledged (DGR

Incidence of the Augmented Reality on the teaching of history. An experience in third year class of primary education

In the following study, the integration of Augmented Reality is valued as an emerging technology with strong possibilities of application in the educational field. In our study, a teaching unit «Time and History» of the Social Science subject in the third course of Primary Education has been implemented. Using different historic 3d image from SketchUp software, specifically the models used have been taken from Warehouse as Augmented Reality scenes and have been visualized through the pc software Aumentaty Author. The sample includes 56 students attending a school in the province of Albacete (Spain). From a quasi-experimental design with a control and an experimental group two dimensions have been analysed: the academic performance and different motivational variables. This paper includes detailed information about the teaching unit, defining contents and time of each session. Unlike other similar studies, this work does not show significant improvement in the students’ academic performance or in their motivation. However, students do believe to have participated actively and that the tool facilitates the learning process making it easy and clear. Moreover, thanks to this method, students have had the chance to work in small groups, improving the cooperation and the social integration, as well as learning the interactive and virtual possibilities that this tool could offer and which help them to improve the digital competence and the searching and information selection skills.</p

Angiotensin II type 2 receptor as a novel activator of brown adipose tissue in obesity

The angiotensin II type 2 receptor (AT2R) exerts vasorelaxant, anti-inflammatory, and antioxidant properties. In obesity, its activation counterbalances the adverse cardiovascular effects of angiotensin II mediated by the AT1R. Preliminary results indicate that it also promotes brown adipocyte differentiation in vitro. Our hypothesis is that AT2R activation could increase BAT mass and activity in obesity. Five-week-old male C57BL/6J mice were fed a standard or a high-fat (HF) diet for 6 weeks. Half of the animals were treated with compound 21 (C21), a selective AT2R agonist, (1 mg/kg/day) in the drinking water. Electron transport chain (ETC), oxidative phosphorylation, and UCP1 proteins were measured in the interscapular BAT (iBAT) and thoracic perivascular adipose tissue (tPVAT) as well as inflammatory and oxidative parameters. Differentiation and oxygen consumption rate (OCR) in the presence of C21 was tested in brown preadipocytes. In vitro, C21-differentiated brown adipocytes showed an AT2R-dependent increase of differentiation markers (Ucp1, Cidea, Pparg) and increased basal and H+ leak-linked OCR. In vivo, HF-C21 mice showed increased iBAT mass compared to HF animals. Both their iBAT and tPVAT showed higher protein levels of the ETC protein complexes and UCP1, together with a reduction of inflammatory and oxidative markers. The activation of the AT2R increases BAT mass, mitochondrial activity, and reduces markers of tissue inflammation and oxidative stress in obesity. Therefore, insulin reduction and better vascular responses are achieved. Thus, the activation of the protective arm of the renin–angiotensin system arises as a promising tool in the treatment of obesity15 página

Arterial stiffness is associated with adipokine dysregulation in non-hypertensive obese mice

This is the peer reviewed version of the following article: Vascular Pharmacology 77 (2016): 38-47, which has been published in final form at http://dx.doi.org/10.1016/j.vph.2015.05.012The aim of this study was to characterize alterations in vascular structure and mechanics in murine mesenteric arteries from obese non-hypertensive mice, as well as their relationship with adipokines. Four-week old C57BL/6J male mice were assigned either to a control (C, 10% kcal from fat) or a high-fat diet (HFD, 45% kcal from fat) for 32 weeks. HFD animals weighed 30% more than controls (p < 0.001), exhibited similar blood pressure, increased leptin, insulin and superoxide anion (O2radical dot−) levels, and reduced adiponectin levels and nitric oxide (NO) bioavailability. Arterial structure showed an outward remodeling with an increase in total number of both adventitial and smooth muscle cells in HFD. Moreover, HFD mice exhibited an increased arterial stiffness assessed by β-values (C = 2.4 ± 0.5 vs HFD = 5.3 ± 0.8; p < 0.05) and aortic pulse wave velocity (PWV, C = 3.4 ± 0.1 vs HFD = 3.9 ± 0.1; p < 0.05). β-Values and PWV positively correlated with leptin, insulin or O2radical dot− levels, whereas they negatively correlated with adiponectin levels and NO bioavailability (p < 0.01). A reduction in fenestrae number together with an increase in type-I collagen amount (p < 0.05) were observed in HFD. These data demonstrate that HFD accounts for the development of vascular remodeling and arterial stiffness associated with adipokine dysregulation and oxidative stress, independently of hypertension developmentThis work was supported by grants from Ministerio de Ciencia e Investigación (BFU2011-25303), Ministerio de Economía y Competitividad (SAF2009-09714, SAF2011-25303, BFU2012-35353), Grupos Universidad Complutense de Madrid (UCM; GR-921641), Fundación Universitaria CEU-San Pablo, Fundación Mutua Madrileña and Sociedad para el Estudio de la Salud Cardiometabólica (SESCAMET). MGO is recipient of a Ministerio de Educación y Ciencia fellowshi

MAPPING THE SPAIN´S EXCLUSIVE ECONOMIC ZONE IN THE GALICIAN MARGIN

MAPPING THE SPAIN´S EXCLUSIVE ECONOMIC ZONE IN THE GALICIAN MARGIN Gómez Ballesteros, M.1(*), González-Aller, J-D. 2, Martín Dávila, J. 3, Carbó, A., 4, Somoza, L. 5, Druet, M. 1, Martínez-Espinosa, S. 2, Catalán, M. 3, Muñoz, A. 4, León, R 5 1 Instituto Español de Oceanografía / C/. Corazón de María, 8, 28020 Madrid 2 Instituto Hidrográfico de la Marina / Pl. San Severiano, 3, 11007 Cádiz 3 Real Observatorio de la Armada, C/. Cecilio Pujazón s/n 11100Cádiz 4 Universidad Complutense de Madrid / Av Séneca, 2, 28040 Madrid 5 Instituto Geológico y Minero de España, Calle de Ríos Rosas, 23, 28003 Madrid (*)Corresponding Author: [email protected] In the context of the Hydrographic and Oceanographic Research of the Spain´s Exclusive Economic program (ZEEE), operated jointly by Instituto Hidrográfico de la Marina (IHM) and Real Observatorio de la Armada (ROA) working in close collaboration with the Instituto Español de Oceanografía (IEO), Universidad Complutense de Madrid (UCM) and Instituto Geológico y Minero de España (IGME) have conducted seven oceanographic cruises in Galician waters (EEZ -01 -02 ZEE , ZEE -03, ZEE -06 -07 ZEE , ZEE- ZEE- 08 and 09). The main objective of the Spain´s Exclusive Economic Zone project is mapping the seafloor, carrying out a systematic bathymetric survey of the 200 miles that comprise this area. In addition, as secondary objectives were performed acquiring that complement other geophysical parameters characterizing the seafloor and seabed from the knowledge of other variables such as the Terrestrial Magnetic Field , Terrestrial Gravity field, sound velocity and seabed internal structure. For the acquisition of detailed and accurate information during these cruises, carried on board the BIO Hespérides, high-resolution geophysical techniques were used to compile the data and the bathymetry of the region was mapped using a multibeam system during which 100 per cent coverage was obtained. At the same time high-resolution parametric seismic reflection profiles, as well as gravity and magnetic, were also recorded in the survey areas. These systems provide data on bathymetry, quality seafloor, acoustics backscatter , gravimetry, magnetometry and subsurface structure and require the use of precise positioning techniques, so were used in conjunction with GPSD and inertial navigation systems. As a result of these oceanographic researches and post-processing, analysis and interpretation of the whole acquired data, a synthesis of 6 maps were published with 1:500.000 scale and corresponding to Bathymetric map, Geomorphology map, Geomagnetic Anomaly map, Bouguer and Free Air Anomaly maps and backscatter map. REFERENCIAS J. Martín Davila, M. Catalán, M. Larrán, Sección de Hidrografía del IHM, A. Carbó, A. Muñoz-Martín, JL Granja, P. Llanes, L. Somoza, R. León, F.J. Gonzalez, M. Gómez-Ballesteros, M. Druet, and J. Acosta, 2014: Zona Económica Exclusiva Española (ZEEE): Margen Continental Gallego. Mapas Generales de batimetría, de anomalías Geomagnéticas, Graviméwtricas de Aire Libre y Bpouguer, Geomorfológico y Mosaico de Imágenes de Reflectividad (E. 1:500.000). Ministerio de Defensa. Secretaria General Técnica, NIPO: 083-12-230-3, DL: M-39518-201

Dental implants placed on bone subjected to vertical alveolar distraction show the same performance as those placed on primitive bone

Introduction: Vertical osteogenic alveolar distraction (VOAD) allows for the augmentation of the alveolar ridge for the placement of dental implants in atrophic alveolar ridges. The goal of this paper is to assess long-term peri- implant bone resorption in implants placed on bones subjected to VOAD, comparing it with a group of patients who had implants placed directly on the alveolar bone without previous bone regeneration. Material and Methods: We conducted a follow-up study on 32 patients who were divided into two groups: The Distraction Group (14 patients), and the Distraction-Free Group (18 patients), who received a total of 100 implants. Peri-implant bone loss was measured by means of panoramic X-rays, at the time of loading and one year later, and in 35 implants of each group after 3 years of functional loading. Results: The peri-implant bone resorption (PBR) average observed in the Distraction Group at the time of prosthetic placement is higher (0.50±0.09 mm) than in the Distraction-Free Group (0.25±0.06 mm), showing statistically significant results (p=0.047). PBR levels 1 year after loading were the same for both groups (0.66 mm). At 3 years, they were higher in the Distraction Group (1.03 ± 0.22 mm vs. 0.68 ± 0.08 mm)