La minería española 2008-09

El año 2008 y los comienzos del 2009 ha sido para la minería española, al igual que muchos otros sectores de la economía española, un periodo de enorme trascendencia. La aguda crisis que vive el mundo actual ha incidido, sin embargo, de manera diferente según los sub-sectores en que se divide la industria mineral. Así, aquellos más directamente ligados al desarrollo de la construcción (áridos, piedra natural y ciertos minerales industriales) han visto derrumbarse la demanda de sus productos finales hasta extremos muy agudos. Sin embargo y a pesar de momentos de incertidumbre al finalizar el año pasado, los combustibles fósiles sólidos y los minerales metálicos, en general, se sitúan entre la esperanza y el desconocimiento de la evolución en los próximos meses. De esta manera, hay que felicitarse de disponer en este momento de cuatro minas metálicas, algunas de ellas de verdadero interés a nivel europeo

Teaching Style in Physical Education and Changes of Daily Physical Activity after One Academic Year in Adolescents: GEOS Study

Increased Moderate-Vigorous physical activity (MVPA) and reduced sedentary time (ST) are key factors for a healthy lifestyle during childhood and adolescence. Studies have suggested that schools may be effective resources to promote healthy habits (Sallis, McKenzie et al. 2012). Therefore, in PE, is important to assess how teachers use strategies and provide students tools to engage in PA with the purpose of reduce the risk of sedentary behavior and contribute to promotion MVPA habits for a healthy lifestyle (Lonsdale, C. et al., 2013). Many factors may be involved in the successful PE class to promote healthy out-school behaviors, as teaching styles (TS), learning styles, learning time, motivation and so on (Mosston, M. 1966). Regarding TS, there is a lack of knowledge about influence of the teaching style (TS) in the promotion of daily MVPA. It was our aim to observe the differences of total daily PA dimensions between two groups of adolescents who were taught during a whole academic year using reproducing (RK) or producing knowledge (PK) TSs.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

La huella del carbono en la clasificación ambiental de los proyectos mineros: Cobre Las Cruces

En los últimos tiempos existe una batería de herramientas y metodología de gestión ambiental desarrolladas por la comunidad científica dedicada a la investigación de los valores ambientales y su mejor gestión. Derivada del concepto de ACV, tambien existe la GER o energía primaria consumida en todas las etapas de ciclo de vida y que es un excelente indicador de la sostenibilidad del proceso. Además, del inventario obligado de en las categorías de impacto ambiental incluido en el ACV, se derivan los resultados o efectos acumulados del proceso en estudio, categorizados como consecuencias ambientales. Del análisis de Ciclo de Vida se deriva, de manera natural, la Huella del Carbono que no viene a ser nada más que la contabilidad de efectos ambientales derivados de el consumo de energía e emisiones de gases invernadero medidos en unidades de CO2 equivalentes. Estas últimas herramientas constituyen todas juntas una manera relativamente fácil de proceder para efectuar una clasificación de la condición de sostenibilidad de un proyecto miner

Reducing the dimensionality effect in importance sampling simulations

The dimensionality effect is avoided by the use of sufficient statistics in event probability estimators realised by importance sampling. If the system function is not a sufficient statistic, an approach is proposed to reduce the dimensionality effect in the estimators. Simulation results of false-alarm probability estimations, applied to radar detection, confirm a clear concordance with the theoretical result

Activity of (2060) Chiron possibly caused by impacts?

The centaur 95P/(2060) Chiron is showing comet-like activity since its discovery, but the mass-loss mechanisms triggering its activity remained unexplained. Although the collision rates in the centaur region are expected to be very low, and impacts are thought not to be responsible for the mass-loss, since the recent indications that Chiron might possess a ring similar to Chariklo's, and assuming that there is debris orbiting around, the impact triggered mass-loss mechanism should not be excluded as a possible cause of its activity. From time series observations collected on Calar Alto Observatory in Spain between 2014 and 2016, we found that the photometric scatter in Chiron's data is larger than a control star's scatter, indicating a possible microactivity, possibly caused by debris falling back to Chiron's surface and lifting small clouds of material. We also present rotational light curves, and measurements of Chiron's absolute magnitudes, that are consistent with the models supporting the presumption that Chiron possesses rings. By co-adding the images acquired in 2015, we have detected a $\sim$5 arcsec long tail, showing a surface brightness of 25.3 mag(V)/arcsec$^{2}$.Comment: Accepted for publication in Monthly Notices of the Royal Astronomical Society (MNRAS) on 2017 December 2

Framework for Academic Advice through Mobile Applications

The increasing rate of high (secondary) school leavers choosing academic majors to study at the university without proper guidance has most times left students with unfavorable consequences including low grades, extra year(s), the need to switch programs and ultimately having to withdraw from the university. In a bid to proffer a solution to the issue, this research aims to build an expert system that recommends university or academic majors to high school students in developing countries where there is a dearth of human career counselors. This is to reduce the adverse effects caused as a result of wrong choices made by students. A mobile rule-based expert system supported with ontology was developed for easy accessibility by the students

Applying Model-Driven Paradigm for the Improvement of Web Requirement Validation

This paper proposes an approach for Web requirements validation by applying the model-driven paradigm in classical requirements validation techniques. In particular, we present how the Navigational Development Techniques (NDT) approach exploits the model-driven paradigm to improve its requirements validation task by exploring tool cases that systematize or even automate the application of requirements validation techniques. Our solution is validated by applying it in a real industrial environment. The results and the learned lessons are presented accordingly

Observational study on fluid therapy management in surgical adult patients

Fluid therapy management; Hemodynamic monitoring; Surgical proceduresGestió de fluidoteràpia; Monitorització hemodinàmica; Procediments quirúrgicsGestión de fluidoterapia; Monitoreo hemodinámico; Procedimientos quirúrgicosBackground Perioperative fluid therapy management is changing due to the incorporation of different fluids, surgical techniques, and minimally invasive monitoring systems. The objective of this study was to explore fluid therapy management during the perioperative period in our country. Methods We designed the Fluid Day study as a cross-sectional, multicentre, observational study. The study was performed in 131 Spanish hospitals in February 2019. We included adult patients undergoing general anaesthesia for either elective or non-elective surgery. Demographic variables were recorded, as well as the type and total volume of fluid administered during the perioperative period and the monitorization used. To perform the analysis, patients were categorized by risk group. Results We recruited 7291 patients, 6314 of which were included in the analysis; 1541 (24.4%) patients underwent high-risk surgery, 1497 (23. 7%) were high risk patients, and 554 (8.7%) were high-risk patients and underwent high-risk surgery; 98% patients received crystalloids (80% balanced solutions); intraoperative colloids were used in 466 patients (7.51%). The hourly intraoperative volume in mL/kg/h and the median [Q1; Q3] administered volume (mL/kg) were, respectively, 6.67 [3.83; 8.17] ml/Kg/h and 13.9 [9.52;5.20] ml/Kg in low-risk patients undergoing low- or intermediate-risk surgery, 6 [4.04; 9.08] ml/Kg/h and 15.7 [10.4;24.5] ml/Kg in high- risk patients undergoing low or intermediate-risk surgery, 6.41 [4.36; 9.33] ml/Kg/h and 20.2 [13.3;32.4] ml/Kg in low-risk patients undergoing high-risk surgery, and 5.46 [3.83; 8.17] ml/Kg/h and 22.7[14.1;40.9] ml/Kg in high-risk patients undergoing high- risk surgery . We used advanced fluid monitoring strategies in 5% of patients in the intraoperative period and in 10% in the postoperative period. Conclusions The most widely used fluid was balanced crystalloids. Colloids were used in a small number of patients. Hourly surgery volume tended to be more restrictive in high-risk patients but confirms a high degree of variation in the perioperatively administered volume. Scarce monitorization was observed in fluid therapy management.Open Access funding enabled and organized by SEDAR

Present and future of Web content accessibility: An analysis

Web je stvoren kao univerzalna mreža znanja. Bio je to ogroman kvalitativni i kvantitativni skok u odnosu na pristup informacijama i njihovu obradu. Međutim, čak i danas, postoje znatne prepreke pristupu mreži velikog broja građana, uključujući osobe s invaliditetom i stare ljude smanjenih sposobnosti kao posljedice godina. Mogućnost pristupa je značajka kojom se olakšava pristup i uspješno korištenje web lokacije ili usluge što većem broju ljudi, bez obzira na njihova osobna ograničenja ili ograničenja nametnuta okolinom. Ovaj članak daje pregled osnovnih značajki mogućnosti pristupa mreži sada i u budućnosti, osvrćući se na uspješnu primjenu smjernica poznatih kao 2.0, kojima se osigurava podudaranje s postojećim zakonskim odredbama na nacionalnom i internacionalnom nivou.The Web was created as a universal network of knowledge. It represented a huge qualitative and quantitative leap in terms of acquisition and processing of information. However, even today, significant barriers make difficult the access of a large number of citizens to the web, including disabled users and old people with diminished skills as an effect of age. Accessibility is the feature which facilitates access to and successful usage of a web site or service for as many people as possible, regardless of their personal limitations or limitations imposed by their environment. This article reviews the main aspects of web accessibility and its future, passing through the effective implementation of guidelines known as 2.0, which ensure compliance with existing legislation at national and international level