Introduction to cross LAK 2016: Learning analytics across spaces

For the LAK (Learning Analytics and Knowledge) community, it is highly important to pay attention to the development and deployment of learning analytics solutions for blended learning scenarios where students work at diverse digital and physical learning spaces and interact in different modalities. This workshop has been a first attempt in gathering the sub-community of LAK researchers, learning scientists and researchers from other communities, interested in ubiquitous, mobile and/or face-to-face learning analytics. It was clear for all the attendees that a key concern that has not been deeply explored yet is associated with the mechanisms to integrate and coordinate learning analytics to provide continued support to learning across digital and physical spaces. The two main goals of the workshop were to share perspectives and identify a set of guidelines that could be offered to teachers, researchers or designers to create and connect Learning Analytics solutions according to the pedagogical needs and contextual constraints to provide support across digital and physical learning spaces

Freeze desalination by the integration of falling film and block freeze concentration techniques

Block and falling film freeze concentration are two technologies that separate water by freezing,with the potential to desalinate seawater. In this study, the integration of two freeze concentration techniques as an alternative to obtain potable water was analysed. Water with 0.5%–8% NaCl was freeze-concentrated by the falling film technique. The ice from each stage was fractionally thawed to recover the solids retained inPostprint (updated version

Proyecto de emprendimiento para revolucionar el concepto del servicio en lavandería

El proyecto surgió a partir de la aplicación de una técnica llamada ideación1, en la cual se realizó como primera actividad una lluvia de ideas para identificar los problemas o necesidades que tiene el común de la gente y que, desde nuestro punto de vista, valía la pena explorar. Una vez identificados estos problemas se realizó un proceso de votación para identificar aquellos que tuviesen una mayor relevancia. Identificados los dos problemas de mayor impacto se optó por elegir uno de ellos para adoptarlo, validarlo y diseñar una propuesta de solución innovadora planteándola como un modelo de negocio base con el que dicha solución pudiera operar en el mercado. Este proceso nos dio aprendizaje y conocimiento de las metodologías Lean startup y Customer development2, que nos permiten evaluar un problema en campo, utilizando como principal herramienta la entrevista y la observación, con la finalidad de poder validar si el problema planteado se percibe como una oportunidad de negocio y si puede ser atractiva, al grado de trabajar en ella para atacarla frontalmente y así ofrecer una solución factible que permita solventar esta necesidad para luego validarla buscando identificar el valor percibido del cliente ante la solución planteada, con la intención final de saber si el cliente tendría la intención de usarla y si estaría dispuesto a pagar por ella. C. Palabras clave Ideación, El proyecto surgió a partir de la aplicación de una técnica llamada ideación1 , en la cual se realizó como primera actividad una lluvia de ideas para identificar los problemas o necesidades que tiene el común de la gente y que, desde nuestro punto de vista, valía la pena explorar. Una vez identificados estos problemas se realizó un proceso de votación para identificar aquellos que tuviesen una mayor relevancia. Identificados los dos problemas de mayor impacto se optó por elegir uno de ellos para adoptarlo, validarlo y diseñar una propuesta de solución innovadora planteándola como un modelo de negocio base con el que dicha solución pudiera operar en el mercado. Este proceso nos dio aprendizaje y conocimiento de las metodologías Lean startup y Customer development2 , que nos permiten evaluar un problema en campo, utilizando como principal herramienta la entrevista y la observación, con la finalidad de poder validar si el problema planteado se percibe como una oportunidad de negocio y si puede ser atractiva, al grado de trabajar en ella para atacarla frontalmente y así ofrecer una solución factible que permita solventar esta necesidad para luego validarla buscando identificar el valor percibido del cliente ante la solución planteada, con la intención final de saber si el posible cliente de esta solución tendría la intención de usarla y si estaría dispuesto a pagar por ella.ITESO, A.C

Fachadas ventiladas activas para reducir la demanda de calefacción en los edificios de oficinas. El caso de España

This paper analyses the energy efficiency of a Ventilated Active Façade –VAF– applied to office buildings in Spain to reduce heating demand. This façade system consists of an outer layer element of 2 mm galvanized steel panels and a 3 cm air cavity where the ventilation air is preheated in winter and exhausted in summer. After defining 8 typical office typologies in Spain, 192 study cases are obtained where different parameters like the percentage of glass in façade, the orientation and the climatic zone of the buildings are considered. The energy demand of all these study cases is obtained using the official simulation tool of the Spanish Technical Building Regulation – CTE called LIDER. The results, in terms of reduction of heating demand, are presented in comparison with the minimum energetic requirements of CTE.En este artículo se analiza la eficiencia energética de una Fachada Ventilada Activa –FVA– aplicada a edificios de oficinas en España para reducir la demanda de calefacción. El sistema de fachada consiste en una hoja exterior de 2 mm de acero galvanizado y una cavidad de 3 cm donde el aire de ventilación es precalentado en invierno y extraído en verano. Tras definir 8 tipologías típicas, se han obtenido 192 casos de estudio en los que se consideran diferentes parámetros: la superficie acristalada, la orientación y la zona climática. El cálculo de la demanda energética de los casos de estudio ha sido llevado a cabo mediante el programa LIDER, el método general del Código Técnico de la Edificación – CTE. Los resultados obtenidos en términos de reducción de la demanda de calefacción, se muestran comparados con los mínimos requerimientos exigidos en el CTE

Uso de componentes de bajo costo para el diseño e implementación de un circuito impreso en el procesamiento digital de señales de audio

Fecha de recepción: Febrero de 2019 / Fecha de aceptación en forma revisada: Mayo 2019     In this paper it is proposed the design and implementation of a printed circuit board that allows the implementation of algorithms for digital audio signal processing in an economically embedded system. The possibilities of developing low cost and easy implementation prototypes were studied, the devices known as dsPIC® were shown very convenient for this purpose and for that reason they have been selected to realize the signal processing tasks. In order to design the board, it has been examined the current of this type of products, mainly by the company Microchip, and it has been established factors that allow the improvements in them. Based on a proposed general scheme and adding criteria of processing speed, energy consumption, price and development possibilities, a prototype was built with satisfactory results.En este trabajo se propone el diseño e implementación de un circuito impreso que permita la implementación de algoritmos de procesamiento digital de señales de audio en un sistema embebido de forma económica. Se estudiaron las posibilidades de desarrollar prototipos de bajo costo y fácil implementación, los dispositivos conocidos como dsPIC® se mostraron muy convenientes para este propósito y por eso han sido seleccionados para realizar las labores de procesamiento de señales. Para el diseño del circuito se ha examinado la actualidad de este tipo de productos, principalmente de la empresa Microchip, y se establecieron factores que permiten mejoras en los mismos. Con base en un esquema general propuesto y sumado a criterios de velocidad de procesamiento, consumo de energía, precio y posibilidades de desarrollo, se construyó un prototipo con resultados satisfactorios

Prevalence, characteristics, and impact of adverse events in 34 Madrid hospitals. The ESHMAD study

Introduction: Adverse Events (AE) are one of the main problems in healthcare. Therefore, many policies have been developed worldwide to mitigate their im pact. The Patient Safety Incident Study in Hospitals in the Community of Madrid (ESHMAD) measures the results of them in the region. Methods: Cross-sectional study, conducted in May 2019, in hospitalised patients in 34 public hospitals using the Harvard Medical Practice Study methodology. A logistic regression model was carried out to study the association of the variables with the presence of AE, calibrated and adjusted by patient. Results: A total of 9975 patients were included, estimating a prevalence of AE of 11.9%. A higher risk of AE was observed in patients with surgical procedures (OR[CI95%]: 2.15[1.79 to 2.57], vs. absence), in Intensive Care Units (OR[CI95%]: 1.60[1.17 to 2.17], vs. Medical) and in hospitals of medium complexity (OR[CI95%]: 1.45[1.12 to 1.87], vs. low complexity). A 62.6% of AE increased the length of the stay or it was the cause of admission, and 46.9% of AE were considered prevent able. In 11.5% of patients with AE, they had contributed to their death. Conclusions: The prevalence of AE remains similar to the previously estimated one in studies developed with the same methodology. AE keep leading to longer hospital stays, contributing to patient's death, showing that it is necessary to put focus on patient safety again. A detailed analysis of these events has enabled the detection of specific areas for improvement according to the type of care, centre and patient

Left-handed musicians show a higher probability of atypical cerebral dominance for language

Music processing and right hemispheric language lateralization share a common network in the right auditory cortex and its frontal connections. Given that the development of hemispheric language dominance takes place over several years, this study tested whether musicianship could increase the probability of observing right language dominance in left-handers. Using a classic fMRI language paradigm, results showed that atypical lateralization was more predominant in musicians (40%) than in nonmusicians (5%). Comparison of left-handers with typical left and atypical right lateralization revealed that: (a) atypical cases presented a thicker right pars triangularis and more gyrified left Heschl's gyrus; and (b) the right pars triangularis of atypical cases showed a stronger intra-hemispheric functional connectivity with the right angular gyrus, but a weaker interhemispheric functional connectivity with part of the left Broca's area. Thus, musicianship is the first known factor related to a higher prevalence of atypical language dominance in healthy left-handed individuals. We suggest that differences in the frontal and temporal cortex might act as shared predisposing factors to both musicianship and atypical language lateralization

Analysis of qPCR reference genes stability determination methods and a practical approach for efficiency calculation on a turbot (Scphthalmus maximus) gonad dataset

Gene expression analysis by reverse transcription quantitative PCR (qPCR) is the most widely used method for analyzing the expression of a moderate number of genes and also for the validation of microarray results. Several issues are crucial for a successful qPCR study, particularly the selection of internal reference genes for normalization and efficiency determination. There is no agreement on which method is the best to detect the most stable genes neither on how to perform efficiency determination. In this study we offer a comprehensive evaluation of the characteristics of reference gene selection methods and how to decide which one is more reliable when they show discordant outcomes. Also, we analyze the current efficiency calculation controversy. Our dataset is composed by gonad samples of turbot at different development times reared at different temperatures. Turbot (Scophthalmus maximus) is a relevant marine aquaculture European species with increasing production in the incoming years. Since females largely outgrow males, identification of genes related to sex determination, gonad development and reproductive behavior, and analysis of their expression profiles are of primary importance for turbot industryVersión del edito

Using radio astronomical receivers for molecular spectroscopic characterization in astrochemical laboratory simulations: A proof of concept

We present a proof of concept on the coupling of radio astronomical receivers and spectrometers with chemical reactorsand the performances of the resulting setup for spectroscopy and chemical simulations in laboratory astrophysics. Several experiments including cold plasma generation and UV photochemistry were performed in a 40\,cm long gas cell placed in the beam path of the Aries 40\,m radio telescope receivers operating in the 41-49 GHz frequency range interfaced with fast Fourier transform spectrometers providing 2 GHz bandwidth and 38 kHz resolution. The impedance matching of the cell windows has been studied using different materials. The choice of the material and its thickness was critical to obtain a sensitivity identical to that of standard radio astronomical observations. Spectroscopic signals arising from very low partial pressures of CH3OH, CH3CH2OH, HCOOH, OCS,CS, SO2 (<1E-03 mbar) were detected in a few seconds. Fast data acquisition was achieved allowing for kinetic measurements in fragmentation experiments using electron impact or UV irradiation. Time evolution of chemical reactions involving OCS, O2 and CS2 was also observed demonstrating that reactive species, such as CS, can be maintained with high abundance in the gas phase during these experiments.Comment: Accepted for publication in Astronomy and Astrophysics in September 21, 2017. 16 pages, 18 figure