Modelos explicativos de Infarto Agudo del Miocardio y su relación con el ABP

El estudio se orientó hacia la caracterización de los modelos explicativos sobre Infarto Agudo del Miocardio en estudiantes de ciencias de la salud, así como a identificar los cambios que ocurren en estos al implementar el aprendizaje basado en problemas. El estudio de tipo descriptivo con análisis comprensivo se desarrolló en dos fases; en la primera, se lograron identificar cuatro modelos explicativos: Sentido común, Anatómico-tisular, Celular-funcional y Biológico-metabólico. En la segunda, se llevó a cabo un análisis comprensivo de los cambios identificados en uno de los estudiantes del grupo general, donde se evidenció evolución en sus modelos explicativos. Lo anterior permite vincular al ABP como estrategia didáctica a la evolución conceptual de los estudiantes y la hace relevante para la enseñanza de las ciencias

Low temperature dielectric relaxation in ordinary perovskite ferroelectrics: enlightenment from high-energy x-ray diffraction

Ordinary ferroelectrics exhibit a second order phase transition that is characterized by a sharp peak in the dielectric permittivity at a frequency-independent temperature. Furthermore, these materials show a low temperature dielectric relaxation that appears to be a common behavior of perovskite systems. Tetragonal lead zirconate titanate is used here as a model system in order to explore the origin of such an anomaly, since there is no consensus about the physical phenomenon involved in it. Crystallographic and domain structure studies are performed from temperature dependent synchrotron x-ray diffraction measurement. Results indicate that the dielectric relaxation cannot be associated with crystallographic or domain configuration changes. The relaxation process is then parameterized by using the Vogel–Fulcher–Tammann phenomenological equation. Results allow us to hypothesize that the observed phenomenon is due to changes in the dynamic behavior of the ferroelectric domains related to the fluctuation of the local polarization.Postprint (author's final draft

The VVV-SkZ pipeline: an automatic PSF-fitting photometric pipeline for the VVV survey

We present the VVV-SkZ_pipeline, a DAOPHOT-based photometric pipeline, created to perform PSF-fitting photometry of "VISTA Variables in the V\'ia L\'actea" (VVV) ESO Public Survey data. The pipeline replaces the user avoiding repetitive interaction in all the operations, retaining all of the benefits of the power and accuracy of the DAOPHOT suite. The pipeline provides an astrometrized photometric catalog reliable up to more than 2 magnitudes brighter than the saturation limit, where other techniques fail. It also produces deeper and more accurate photometry. These achievements allow the VVV-SkZ_pipeline to produce data well anchored to the selected standard photometric system and analyze important phenomena (i.e. TRGB, RGB slope, HB morphology, RR Lyrae), that other methods are not able to manage.Comment: Accepted by RevMexAA for vol. 49, n.2, October 201

Acute responses of blood pressure, heart rate and rating of perceived exertion in hypertensive patients

Objetivo: Medir y comparar el comportamiento agudo de la presión arterial (TA), la frecuencia cardiaca (FC) y la percepción subjetiva del esfuerzo físico (PSE) durante un circuito de pesas de resistencia variable (CRV) versus ejercicio aeróbico submáximo en cicloergómetro (EA) en hipertensos estados I y II.Métodos: Se evaluaron 21 individuos (8 hombres y 13 mujeres) hipertensos controlados de estados I y II (15 activos y 6 sedentarios, 56±5.9 años). Todos recibieron inducción sobre calentamiento, manejo de escala de PSE, técnica respiratoria y uso de máquinas de pesas durante el ejercicio. Con intervalos de una semana se sometieron a una sesión de CRV en seis estaciones al 50% de 1RM, y a una sesión de EA a intensidades de 70%-80% de la FCmax, en intervalos de una semana. Durante ambas sesiones se realizaron mediciones de FC, PA y PSE.Resultados: Se aplicó una Prueba t pareada para comparar las respuestas a ambos tipos de ejercicio. Se encontró un incremento menor de la FC (p0.05).Conclusión: El estudio evidenció que la respuesta cardiovascular aguda y la PSE de hipertensos durante un CRV fueron similares a las observadas con EA. Se observó que la respuesta presora al circuito de pesas fue menor en pacientes con entrenamiento aeróbico previo.Objective: To assess and compare acute responses in arterial blood pressure (BP), heart rate (HR) and rating of perceived exertion scale (PES) during a variable-resistance weight-lifting circuit (WC) versus submaximal aerobic exercise in cycloergometer (AE) in individuals with hypertension scaled I and II. Methods: 21 subjects with controlled hypertension scaled I and II (8 males and 13 females, 15 actives and 6 sedentary, age 56±5.9 years) were evaluated. All the participants received training about warm-up, use of PES, and respiratory and weight lifting machines techniques in exercise. All underwent a single session of WC in six stations at 50% 1RM and a single session of AE at 70%-80% FCmax, in intervals of one week. BP, HR and PES was measured in both exercises. Results: To compare responses in both types of exercise, at Test was used. It found a lower response of HR (p<0.001), systolic BP (p<0.005) and PES (p<0.005) during WC. Greater diastolic BP response was found in WC, although it was not significative (p=0.139). Sedentary subjects showed greater increases. Responses of variables were similar between stations in WC. Conclusion: This study evidenced a similar behavior of acute cardiovascular responses and PES during WC versus AE in hypertensive subjects. It showed a lower pressure response during WC in subjects with previous aerobic training

Predicting the effect of improved socioeconomic health determinants on the tuberculosis epidemic

Two important public health documents have recently established programmatic goals for tuberculosis control. The first is WHO's End TB Strategy, which represents the evolution of previous DOTS (directly observed treatment, short-course) and Stop TB strategies.1 End TB is built around three pillars: pillar 1 focuses on diagnosis, treatment, and prevention; pillar 2 on ways to tackle socioeconomic factors (eg, poverty reduction, social protection, and universal access); and pillar 3 on scientific research

Knowledge discovery process for description of spatially referenced clusters

Spatial clustering is an important field of spatial data mining and knowledge discovery that serves to partition a spatial data set to obtain disjoint subsets with spatial elements that are similar to each other. Existing algorithms can be used to perform three types of cluster analyses, including clustering of spatial points, regionalization and point pattern analysis. However, all these existing methods do not provide a description of the discovered spatial clusters, which is useful for decision making in many different fields. This work proposes a knowledge discovery process for the description of spatially referenced clusters that uses decision tree learning algorithms. Two proofs of concept of the proposed process using different spatial clustering algorithm on real data are also provided.Facultad de Informátic

Knowledge discovery process for description of spatially referenced clusters

Spatial clustering is an important field of spatial data mining and knowledge discovery that serves to partition a spatial data set to obtain disjoint subsets with spatial elements that are similar to each other. Existing algorithms can be used to perform three types of cluster analyses, including clustering of spatial points, regionalization and point pattern analysis. However, all these existing methods do not provide a description of the discovered spatial clusters, which is useful for decision making in many different fields. This work proposes a knowledge discovery process for the description of spatially referenced clusters that uses decision tree learning algorithms. Two proofs of concept of the proposed process using different spatial clustering algorithm on real data are also provided.Facultad de Informátic

Bioconversion of Cheese Whey and Food By-Products by Phaeodactylum tricornutum into Fucoxanthin and n-3 Lc-PUFA through a Biorefinery Approach

This study investigates the potential of utilizing three food wastes: cheese whey (CW), beet molasses (BM), and corn steep liquor (CSL) as alternative nutrient sources for the cultivation of the diatom Phaeodactylum tricornutum, a promising source of polyunsaturated eicosapentaenoic acid (EPA) and the carotenoid fucoxanthin. The CW media tested did not significantly impact the growth rate of P. tricornutum; however, CW hydrolysate significantly enhances cell growth. BM in cultivation medium enhances biomass production and fucoxanthin yield. The optimization of the new food waste medium was conducted through the application of a response surface methodology (RSM) using hydrolyzed CW, BM, and CSL as factors. The results showed a significant positive impact of these factors (p < 0.005), with an optimized biomass yield of 2.35 g L-1 and a fucoxanthin yield of 3.64 mg L-1 using a medium composed of 33 mL L-1 of CW, 2.3 g L-1 of BM, and 2.24 g L-1 of CSL. The experimental results reported in this study showed that some food by-products from a biorefinery perspective could be utilized for the efficient production of fucoxanthin and other high-added-value products such as eicosapentaenoic acid (EPA).Italian Ministry of Education, Universities, and Research (MIUR)The Spanish Ministry of Science, Education, and Universities/Spanish State Research Agency (PCI2018-093178)Co-funding by the European Union’s Horizon 2020 research and innovation progra

Formulation of New Media from Dairy and Brewery Wastes for a Sustainable Production of DHA-Rich Oil by Aurantiochytrium mangrovei

This research was funded by the SUSPUFA project, ID 145, as part of the ERA-Net SUSFOOD2, with funding provided by national and regional sources (Ministero dellIstruzione dellUniversita e della Ricerca, MIUR and Spanish Ministry of Science, Education and Universities/Spanish State Research Agency-PCI2018-093178) and was co-funded by the European Unions Horizon 2020 research and innovation programme.SUSPUFA project, ERA-Net SUSFOOD2 145Ministry of Education, Universities and Research (MIUR)Spanish Ministry of Science, Education and Universities/Spanish State Research Agency PCI2018-093178European Unions Horizon 2020 research and innovation programm

Sublinear scalarizations for proper and approximate proper efficient points in nonconvex vector optimization

We show that under a separation property, a Q-minimal point in a normed space is the minimum of a given sublinear function. This fact provides sufficient conditions, via scalarization, for nine types of proper efficient points; establishing a characterization in the particular case of Benson proper efficient points. We also obtain necessary and sufficient conditions in terms of scalarization for approximate Benson and Henig proper efficient points. The separation property we handle is a variation of another known property and our scalarization results do not require convexity or boundedness assumptions.Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. Fernando García-Castaño and Miguel Ángel Melguizo-Padial acknowledge the financial support from the Spanish Ministry of Science, Innovation and Universities (MCIN/AEI) under grant PID2021-122126NB-C32, co-funded by the European Regional Development Fund (ERDF) under the slogan “A way of making Europe”