Valor educativo de los estudios sistemáticos de mapeo: una replicación de un estudio

The goal of this study is to validate the results of a prior study on the educational value of systematic mapping studies (SMS) and evaluate the possibility of generalizing those results to similar contexts. Since the inception of the Evidence Based Software Engineering (EBSE) paradigm in 2004, few studies have aimed at evaluating their impact in the academic field, and the educational values that SMS can offer to the students. In 2010, three renowned researchers presented an article on this subject at ICSE'10. The study made interesting contributions. We believe that, after 8 years, a replication of that study can be useful to assess the original findings and to guide future educational interventions. As a research method, we did a replication of the original multi-case holistic study. This replication confirms all but two of the results from the original work. The differences may be due to slight variations in the context. The experience of undertaking an SMS provided the students with both research skills and a broad understanding of a research area. We encourage other researchers to replicate this study, to gain further insights into the educational value of this method.El objetivo de este estudio es el de validar los resultados de un estudio anterior sobre el valor educativo de los estudios sistemáticos de mapeo (SMS), y evaluar la posibilidad de generalizar aquellos resultados a contextos similares. Desde la aparición del paradigma de Ingeniería del Software Basada en Evidencias (EBSE) en 2004, pocos estudios se han dirigido a evaluar su impacto en el ámbito académico, y el valor educativo que los SMS pueden ofrecer a los estudiantes. En 2010 tres reconocidos investigadores presentaron un artículo sobre éste asunto en ICSE’10. El estudio hizo interesantes contribuciones. Creemos que, después de 8 años, una replicación de ese estudio puede ser útil para comprobar los hallazgos originales y, para guiar futuras intervenciones educativas. Como método de investigación, hicimos una replicación del estudio holístico multi-caso original. Esta replicación confirma todos los resultados, menos dos, del estudio original. Las diferencias pueden deberse a pequeñas variaciones en el contexto. La experiencia de realizar un SMS proporcionó a los estudiantes tanto destrezas para la investigación como un amplio conocimiento de su área de investigación. Animamos a otros investigadores a replicar este estudio, para conseguir mayor información sobre el valor educativo de éste método.Facultad de Informátic

Persistence and intensity of soil water repellency from soils with andic properties from the Campania region (Southwest, Italy) under different forest types

Congreso celebrado del 2-6, julio, 2012, en Fiera del Levante, Bari, Italia.Soil water repellency (SWR) is a property of many soils that is getting more and more interesting for the scientific community, because of its consequences on soil erosion risk, runoff or infiltration rates and even plant ecology. The presence of hydrophobic organic acids released by roots and plant tissues, fungal activity, organic matter mineralization rates, or wildfires are considered the main causes of SWR. Some of the consequences of SWR are reduced soil infiltration rates, enhanced runoff flow and soil erosion. Significance of these effects depends upon the severity and spatial variability of SWR. SWR is often associated to vegetation types, although it cannot be assumed that certain species always induce water repellency under natural conditions. Because of resins, waxes and aromatic oils in their tissues, evergreen trees as eucalyptus and coniferous are usually associated with soil hydrophobicity, although it has been found also in a variety of soils, climates and vegetation types. But the relationship between water repellent soils and plant species is not always one-to-one. Soil properties as texture, aggregation, acidity, microbiome and other are also implied in the development of hydrophobicity. Regarding organic matter, several authors have reported inconsistent results after studying the relationship between soil organic matter content and SWR. A possible explanation for this is that quality of organic matter is more important than content. Consequently, it is necessary to investigate the role that organic matter content and properties play in the development of hydrophobicity in different soil and vegetation types. The objective of this research is the study the relationship between SWR and organic matter properties in andic soils from the Campania region (SW Italy) under different vegetation types.Peer reviewe

Valor educativo de los estudios sistemáticos de mapeo: una replicación de un estudio

The goal of this study is to validate the results of a prior study on the educational value of systematic mapping studies (SMS) and evaluate the possibility of generalizing those results to similar contexts. Since the inception of the Evidence Based Software Engineering (EBSE) paradigm in 2004, few studies have aimed at evaluating their impact in the academic field, and the educational values that SMS can offer to the students. In 2010, three renowned researchers presented an article on this subject at ICSE'10. The study made interesting contributions. We believe that, after 8 years, a replication of that study can be useful to assess the original findings and to guide future educational interventions. As a research method, we did a replication of the original multi-case holistic study. This replication confirms all but two of the results from the original work. The differences may be due to slight variations in the context. The experience of undertaking an SMS provided the students with both research skills and a broad understanding of a research area. We encourage other researchers to replicate this study, to gain further insights into the educational value of this method.El objetivo de este estudio es el de validar los resultados de un estudio anterior sobre el valor educativo de los estudios sistemáticos de mapeo (SMS), y evaluar la posibilidad de generalizar aquellos resultados a contextos similares. Desde la aparición del paradigma de Ingeniería del Software Basada en Evidencias (EBSE) en 2004, pocos estudios se han dirigido a evaluar su impacto en el ámbito académico, y el valor educativo que los SMS pueden ofrecer a los estudiantes. En 2010 tres reconocidos investigadores presentaron un artículo sobre éste asunto en ICSE’10. El estudio hizo interesantes contribuciones. Creemos que, después de 8 años, una replicación de ese estudio puede ser útil para comprobar los hallazgos originales y, para guiar futuras intervenciones educativas. Como método de investigación, hicimos una replicación del estudio holístico multi-caso original. Esta replicación confirma todos los resultados, menos dos, del estudio original. Las diferencias pueden deberse a pequeñas variaciones en el contexto. La experiencia de realizar un SMS proporcionó a los estudiantes tanto destrezas para la investigación como un amplio conocimiento de su área de investigación. Animamos a otros investigadores a replicar este estudio, para conseguir mayor información sobre el valor educativo de éste método.Facultad de Informátic

Manejo perioperatorio de fármacos anticoagulantes y antiagregantes en el paciente con fractura de cadera

La fractura de cadera eleva de manera significativa en los estudios publicados la morbilidad y la mortalidad en los pacientes ancianos que la padecen. La participación en el proceso de fármacos que alteran la hemostasia se ha convertido en uno de los aspectos más importantes y controvertidos del manejo perioperatorio del paciente con fractura de cadera. La anticoagulación o antiagregación plaquetaria de estos pacientes tiene unas implicaciones tanto en la práctica anestésica como quirúrgica que hacen necesaria la búsqueda de un equilibrio entre el riesgo hemorrágico y trombótico de los mismos. Con la elaboración del presente protocolo, en línea con las últimas evidencias científicas publicadas, se sientan las bases para avanzar en el tratamiento de este grupo de pacientes. Una atención multidisciplinar especializada, una fijación precoz de la fractura antes de las 48 horas, y un efectivo programa de rehabilitación pueden disminuir las complicaciones del proceso.Hip fracture rises significantly in published studies morbidity and mortality in elderly patients. Participation in the process of hemostasis-altering drugs has become one of the most important and controversial perioperative management of patients with hip fracture aspects. Anticoagulation or antiplatelet of these patients have some implications as a surgical anesthetic practice that make it necessary to seek a balance between bleeding and thrombotic risk thereof. With the development of this protocol, in line with the latest scientific evidence published, the stage is set to advance the treatment of this patient group. A specialized multidisciplinary care, early fracture fixation within 48 hours and an effective rehabilitation program can reduce complications of that process

Short-term effects of impurities in the CO2 stream injected into fractured carbonates.

After the Paris Agreement in which 195 countries are involved, the Carbon Capture and Storage (CCS) is now an accepted technology in the United Nations Framework Convention on Climate Change (UNFCCC). In Spain, Fundación Ciudad de la Energía (CIUDEN) has successfully completed the full CCS chain, being CO2 captured in the Technology Development Centre in Cubillos del Sil (León, Spain) whereas that it is geologically stored in a deep saline aquifer, formed by fractured carbonates with poor matrix porosity, located in the Technology Development Plant (TDP) at Hontomín (Burgos, Spain). The results of the field tests, in which up to 150 tons of CO2 and synthetic air (5 %v of N2 and O2) were co-injected on site, are analyzed in this paper comparing the operational parameters gained during the injection of impure CO2 (pressures, temperatures and flow ranges) with its corresponding baseline previously determined (i.e. 1,500 tons of pure CO2 were injected during the reservoir hydraulic characterization). Besides that, the geochemical reactivity analysis of impure CO2 injected in this saline aquifer and its correlation with the results from laboratory tests were assessed. As main conclusions from laboratory scale results, a porosity diminution was measured after the injection of CO2 with 5 %v of SO2; apart from that, without SO2, the effluent pH was in the range of 7-8 whereas in case of CO2 and SO2, a pH of 1-2 was obtained. Otherwise and focused on field scale tests, a density decrease was detected comparing the base case (pure CO2) with the CO2 injection containing 5.1 %v of synthetic air. On the other hand, Ca2+, SO42-, Mg2+ and K+ migration effects in the rock were also detected and analyzed

New Applications of 3D SLAM on Risk Management Using Unmanned Aerial Vehicles in the Construction Industry

Risk Management is an integral part of the Corporate Governance of the Companies, whose objective is to estimate the risks related to each line of business and to make appropriate decisions regarding the adoption of preventive measures. The construction industry, due to its peculiar characteristics about occupational risks, is a sector that must pay particular attention to this issue. Unmanned aerial robots are part of a generation of new technologies, which are emerging in the attempt to develop robust and efficient algorithms capable of obtaining 3D models of structures under construction, to support the assessment of the situation in case of an eventuality, before the direct human intervention. This article proposes to develop a risk management strategy for the construction industry based on obtaining 3D models of work environments using drones, which will allow safe evaluation of risks present in construction zones

Planck intermediate results: IV. The XMM-Newton validation programme for new Planck galaxy clusters

We present the final results from the XMM-Newton validation follow-up of new Planck galaxy cluster candidates. We observed 15 new candidates, detected with signal-to-noise ratios between 4.0 and 6.1 in the 15.5-month nominal Planck survey. The candidates were selected using ancillary data flags derived from the ROSAT All Sky Survey (RASS) and Digitized Sky Survey all-sky maps, with the aim of pushing into the low SZ flux, high-z regime and testing RASS flags as indicators of candidate reliability. Fourteen new clusters were detected by XMM-Newton, ten single clusters and two double systems. Redshifts from X-ray spectroscopy lie in the range 0.2 to 0.9, with six clusters at z > 0.5. Estimated masses (M500) range from 2.5 × 1014 to 8 × 1014 MM·. We discuss our results in the context of the full XMM-Newton validation programme, in which 51 new clusters have been detected. This includes four double and two triple systems, some of which are chance projections on the sky of clusters at different redshifts. We find thatassociation with a source from the RASS-Bright Source Catalogue is a robust indicator of the reliability of a candidate, whereas association with a source from the RASS-Faint Source Catalogue does not guarantee that the SZ candidate is a bona fide cluster. Nevertheless, most Planck clusters appear in RASS maps, with a significance greater than 2σ being a good indication that the candidate is a real cluster. Candidate validation from association with SDSS galaxy overdensity at z > 0.5 is also discussed. The full sample gives a Planck sensitivity threshold of Y500 4 × 10-4 arcmin2, with indication for Malmquist bias in the Y X-Y500 relation below this threshold. The corresponding mass threshold depends on redshift. Systems with M500 > 5 × 1014 MM at z > 0.5 are easily detectable with Planck. The newly-detected clusters follow the YX-Y500 relation derived from X-ray selected samples. Compared to X-ray selected clusters, the new SZ clusters have a lower X-ray luminosity on average for their mass. There is no indication of departure from standard self-similar evolution in the X-ray versus SZ scaling properties. In particular, there is no significant evolution of the YX/Y500 ratio. © ESO, 2013.The Planck Collaboration acknowledges the support of: ESA; CNES and CNRS/INSU-IN2P3-INP (France); ASI, CNR, and INAF (Italy); NASA and DoE (USA); STFC and UKSA (UK); CSIC, MICINN and JA (Spain); Tekes, AoF and CSC (Finland); DLR and MPG (Germany); CSA (Canada); DTU Space (Denmark); SER/SSO (Switzerland); RCN (Norway); SFI (Ireland); FCT/MCTES (Portugal); and DEISA (EU).Peer Reviewe

Controlled deformation of vesicles by flexible structured media

Liquid crystalline (LC) materials, such as actin or tubulin networks, are known to be capable of deforming the shape of cells. Here, elements of that behavior are reproduced in a synthetic system, namely, a giant vesicle suspended in a LC, which we view as a first step toward the preparation of active, anisotropic hybrid systems that mimic some of the functionality encountered in biological systems. To that end, we rely on a coupled particle-continuum representation of deformable networks in a nematic LC represented at the level of a Landau–de Gennes free energy functional. Our results indicate that, depending on its elastic properties, the LC is indeed able to deform the vesicle until it reaches an equilibrium, anisotropic shape. The magnitude of the deformation is determined by a balance of elastic and surface forces. For perpendicular anchoring at the vesicle, a Saturn ring defect forms along the equatorial plane, and the vesicle adopts a pancake-like, oblate shape. For degenerate planar anchoring at the vesicle, two boojum defects are formed at the poles of the vesicle, which adopts an elongated, spheroidal shape. During the deformation, the volume of the topological defects in the LC shrinks considerably as the curvature of the vesicle increases. These predictions are confirmed by our experimental observations of spindle-like shapes in experiments with giant unilamellar vesicles with planar anchoring. We find that the tension of the vesicle suppresses vesicle deformation, whereas anchoring strength and large elastic constants promote shape anisotropy