Internal determinants of university student employability. Construction and validation of scales

[EN] One of the challenges faced by European universities today is to ensure that their graduates find employment in line with their attributes. Graduate employability depends, among other factors, on many internal determinants in individuals. However, there is no consensus on how to measure them, and the scales developed to date have not been properly validated. The purpose of this paper is to construct and validate, at confirmatory level, a set of instruments for measuring the internal determinants of graduate employability. The results, based on a sample of 816 students, show the structure of the scales resulting from checking content validity, dimensionality, reliability, and convergent, discriminant and nomological validity.Caballero, G.; Álvarez, P.; López-Miguens, MJ. (2017). Internal determinants of university student employability. Construction and validation of scales. En Proceedings of the 3rd International Conference on Higher Education Advances. Editorial Universitat Politècnica de València. 983-990. https://doi.org/10.4995/HEAD17.2017.5491OCS98399

Which are the predictors of perceived employability? An approach based on three studies

This study proposes a holistic model of perceived employability in university students, covering the following five areas: human capital, social capital, cultural capital, individual attributes and behaviours, and contextual factors. Three studies comprising five experts and 1,088 students were performed. Through these studies, the psychometric properties of the scales used were verified, and the proposed theoretical structural model was estimated. The results confirm that university student networks, labour market and self-confidence in job searching and university are the most important factors in graduates’ perception of employabilit

Diferencias perceptuales de los visitantes en las costas andaluzas por temporada turística

El presente trabajo está centrado en el estudio de las valoraciones de los turistas de sol y playa en Andalucía. Para ello, se distinguen las cinco zonas turísticas de las costas andaluzas: la Costa de Almería, la Costa de la Luz (Cádiz), la Costa Tropical (Granada), la Costa de la Luz (Huelva) y la Costa del Sol (Málaga). El análisis se realiza en función de tres temporadas turísticas: alta, media y baja. Los resultados obtenidos indican que existen diferencias significativas en la mayoría de los casos estudiados. Especialmente, hay mayores diferencias en las comparaciones entre las temporadas media y alta.This paper focuses on the study of the assessments of the sun and sand tourists in Andalusia (Spain). To do this, five tourist areas of the Andalusian coast are distinguished: Costa de Almeria, Costa de la Luz (Cadiz), Costa Tropical (Granada), Costa de la Luz (Huelva), and Costa del Sol (Malaga). The analysis is based on three tourist seasons: high, medium and low seasons. The results indicate that significant differences exist in most of the cases studied. Especially, there are major differences in the comparisons between the medium and high seasons

Medium-frequency electrical resistance sintering of oxidized C.P. iron powder

Commercially pure (C.P.) iron powders with a deliberate high degree of oxidation were consolidated by medium-frequency electrical resistance sintering (MF-ERS). This is a consolidation technique where pressure, and heat coming from a low-voltage and high-intensity electrical current, are simultaneously applied to a powder mass. In this work, the achieved densification rate is interpreted according to a qualitative microscopic model, based on the compacts global porosity and electrical resistance evolution. The effect of current intensity and sintering time on compacts was studied on the basis of micrographs revealing the porosity distribution inside the sintered compact. The microstructural characteristics of compacts consolidated by the traditional cold-press and furnace-sinter powder metallurgy route are compared with results of MF-ERS consolidation. The goodness of MF-ERS versus the problems of conventional sintering when working with oxidized powders is analyzed. The electrical consolidation can obtain higher densifications than the traditional route under non-reducing atmospheres.Ministerio de Economía y Competitividad DPI2015-69550-C2-1-PMinisterio de Economía y Competitividad DPI2015-69550-C2-2-

Síndrome de embolismo graso. Su comportamiento en 10 años de estudio

A descriptive, longitudinal, retrospective study was conducted from October 2000 to September 2010 with patients diagnosed with fat embolism syndrome in the Arnaldo Milian Castro Provincial University Hospital in Santa Clara. Variables such as: age, sex, fracture type, site and pattern of fracture, clinical forms, the time between the occurrence of fracture and definitive stabilization, as well as its evolution were studied. There was a predominance of males and the age group between 21 to 30 years. Most cases were secondary to fractures of long bones and pelvis. Closed femur fracture was fracture most associated with the onset of the disease. The clinical respiratory form was the most frequent. A time less than 24 hours characterized the interval between production of the fracture and the onset of symptoms, and the largest interval of 72 hours was the most frequent one between the trauma and the definitive fracture stabilization. The live discharge was predominant and mortality was 11.1%.Se realizó un estudio descriptivo, longitudinal, retrospectivo, desde octubre de 2000 hasta septiembre de 2010 con los pacientes diagnosticados con síndrome de embolismo graso en el Hospital Provincial Universitario “Arnaldo Milián Castro” de la Ciudad de Santa Clara. Se estudiaron variables  como: la edad, el sexo, el tipo de fractura, el sitio y el patrón de la fractura, las formas clínicas, el tiempo transcurrido entre la fractura y la estabilización definitiva, así como la evolución.  Predominó el sexo masculino y el grupo de edad de 21 - 30 años, la mayoría de los casos fueron secundarios a fracturas de huesos largos y pelvis, la fractura cerrada de fémur fue la más asociada con la aparición de la enfermedad, la forma clínica respiratoria fue la más frecuente, el tiempo menor de 24 horas caracterizó el intervalo entre la fractura y la aparición de los síntomas y el intervalo mayor de 72 horas fue el más frecuente entre el trauma y la consolidación de la fractura; el egreso vivo fue predominante y la mortalidad fue de 11.1%

Design of asymptotically optimal improper constellations with hexagonal packing

This paper addresses the problem of designing asymptotically optimal improper constellations with a given circularity coefficient (correlation coefficient between the constellation and its complex conjugate). The designed constellations are optimal in the sense that, at high signal-to-noise-ratio (SNR) and for a large number of symbols, yield the lowest probability of error under an average power constraint for additive white Gaussian noise channels. As the number of symbols grows, the optimal constellation is the intersection of the hexagonal lattice with an ellipse whose eccentricity determines the circularity coefficient. Based on this asymptotic result, we propose an algorithm to design finite improper constellations. The proposed constellations provide significant SNR gains with respect to previous improper designs, which were generated through a widely linear transformation of a standard M-ary quadrature amplitude modulation constellation. As an application example, we study the use of these improper constellations by a secondary user in an underlay cognitive radio network.The work of Jesús A. López-Fernández and R. G. Ayestarán was partly supported by the Ministerio de Ciencia, Innovación y Universidades under project TEC2017-86619-R (ARTEINE), and by the Gobierno del Principado de Asturias under project GRUPIN-IDI2018-000191. The work of I. Santamaria was partly supported by the Ministerio de Economía y Competitividad (MINECO) of Spain, and AEI/FEDER funds of the E.U., under grant TEC2016-75067-C4-4-R (CARMEN) and TEC2015-69648-REDC (Red COMONSENS). The work of C. Lameiro was supported by the German Research Foundation (DFG) under grant LA 4107/1-1

Mesoporous niobium oxide for dehydration of D-xylose into furfural

Se ha demostrado que el óxido de niobio mesoporoso es un catalizador eficaz para la deshidratación de D-xilosa a furfural, alcanzando una conversión del 92% y un rendimiento de furfural 49,3% a 170º C y 90 minutos. La lixiviación de Nb, determinada por ICP-MS, era inferior al 0,5% en peso de la concentración de Nb inicial, confirmando de este modo la estabilidad del catalizador ácido sólido.El furfural posee un gran potencial como molécula plataforma de origen renovable para la síntesis de una alta variedad de compuestos químicos. Se obtiene mediante la deshidratación de pentosas, principalmente a partir de D-xilosa, proceso catalizado por ácidos minerales en fase homogénea. Por tanto, dentro de la química verde y la búsqueda de sostenibilidad de los procesos catalíticos, es necesaria su sustitución por catalizadores sólidos ácidos que sean tolerantes al agua, ya que es el disolvente más utilizado para esta reacción. El óxido de niobio posee propiedades ácidas y es insoluble en agua, pero su superficie específica es muy baja. Por lo tanto, resulta muy interesante la síntesis de un óxido de niobio mesoporoso para emplearlo como catalizador en esta reacción. En este trabajo, se ha sintetizado un Nb2O5 mesoporoso y se ha evaluado su comportamiento catalítico en la obtención de furfural a partir de D-xilosa.Spanish Ministry of Science and Innovation (ENE2009-12743-C04-03 project)Junta de Andalucía (P09-FQM-5070).Ministry of Science and Innovation for the financial support under the Program Ramón y Cajal (RYC-2008-03387)

Nickel Porous Compacts Obtained by Medium-Frequency Electrical Resistance Sintering

A commercially pure (c.p.) nickel powder was consolidated by Medium-Frequency Electrical Resistance Sintering (MF-ERS). In this consolidation technique, a pressure and the heat released by a high-intensity and low-voltage electrical current are concurrently applied to a metal powder mass. A nickel powder with a high tap porosity (86%) and a low applied pressure (only 100 MPa) is chosen in order to be able to obtain compacts with different levels of porosity, to facilitate the study of the porosity influence on the compact properties. The influence of current intensity and heating time on the global porosity values, the porosity and microhardness distribution, and the electrical conductivity of the sintered compacts is studied. The properties of the compacts consolidated by MF-ERS are compared with the results obtained by the conventional powder metallurgy route, consisting of cold pressing and furnace sintering. A universal equation to describe the porosity influence on all the analyzed properties of powder aggregates and sintered compacts is proposed and validated

Insight into ADHD diagnosis with deep learning on Actimetry: Quantitative interpretation of occlusion maps in age and gender subgroups

Producción CientíficaAttention Deficit/Hyperactivity Disorder (ADHD) is a prevalent neurodevelopmental disorder in childhood that often persists into adulthood. Objectively diagnosing ADHD can be challenging due to the reliance on subjective questionnaires in clinical assessment. Fortunately, recent advancements in artificial intelligence (AI) have shown promise in providing objective diagnoses through the analysis of medical images or activity recordings. These AI-based techniques have demonstrated accurate ADHD diagnosis; however, the growing complexity of deep learning models has introduced a lack of interpretability. These models often function as black boxes, unable to offer meaningful insights into the data patterns that characterize ADHD.Agencia Estatal de Investigación (grants PID2020-115339RB-I00, TED2021-130090B-I00 and TED2021-131536B-I00)EU Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie grant agreement (101008297)Company ESAOTE Ltd (grant 18IQBM

DMN for Data Quality Measurement and Assessment

Data Quality assessment is aimed at evaluating the suitability of a dataset for an intended task. The extensive literature on data quality describes the various methodologies for assessing data quality by means of data profiling techniques of the whole datasets. Our investigations are aimed to provide solutions to the need of automatically assessing the level of quality of the records of a dataset, where data profiling tools do not provide an adequate level of information. As most of the times, it is easier to describe when a record has quality enough than calculating a qualitative indicator, we propose a semi-automatically business rule-guided data quality assessment methodology for every record. This involves first listing the business rules that describe the data (data requirements), then those describing how to produce measures (business rules for data quality measurements), and finally, those defining how to assess the level of data quality of a data set (business rules for data quality assessment). The main contribution of this paper is the adoption of the OMG standard DMN (Decision Model and Notation) to support the data quality requirement description and their automatic assessment by using the existing DMN engines.Ministerio de Ciencia y Tecnología RTI2018-094283-B-C33Ministerio de Ciencia y Tecnología RTI2018-094283-B-C31European Regional Development Fund SBPLY/17/180501/00029