EDUCACIÓN EN CONTEXTOS NO FORMALES: LA EDUCACIÓN DE CALLE COMO METODOLOGÍA DE TRABAJO EN CONTEXTOS DE MARGINACIÓN SOCIAL

El presente estudio trata de presentar algunos de los resultados de la investigación llevada a cabo en el barrio de Los Asperones en la provincia de Málaga. Un barrio que se encuentra en situación de pobreza extrema y marginación social. Las conclusiones resultantes del estudio están ligados a la educación de calle y a la educación social en contextos no formales. Para ello, se han realizado multitud de entrevistas, grupos focales y observaciones etnográficas a diversos informantes clave (personas del barrio, profesionales de la educación, políticos, etc.). Los resultados de la investigación ayudan a dilucidar la necesidad de acompañar en los contextos no formales desde un paradigma social basado en la creación de vínculos socio afectivos que promuevan el empoderamiento y la búsqueda de nuevos retos personales.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Time-dependent monitoring of cement hydration by combined laboratory x-ray microtomography and powder diffraction

Following the reaction degree of amorphous phases in cements is very challenging. It becomes even harder when some additions (supplementary cementitious materials) are employed. Nowadays, calcined clays are attracting a lot of attention as it is possible to reduce the clinker factor by 50%, which leads to a 40% CO2 cement footprint reduction. Thus, the aim of our overall project is to follow the reaction degree of amorphous anhydrous cement phases (for instance metakaolin) to yield different amorphous phase(s) (f.i. C-A-S-H gel) by combined X-ray micro-computed tomography (μCT) and powder diffraction (PD) analyses at different ages of hydration. Furthermore, some microstructural features, like porosity, can also be mapped out which are important for durability.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

A Light Calibration System for the ProtoDUNE-DP Detector

A LED-based fiber calibration system for the ProtoDUNE-Dual Phase (DP) photon detection system (PDS) has been designed and validated. ProtoDUNE-DP is a 6x6x6 m3 liquid argon time-projection-chamber currently being installed at the Neutrino Platform at CERN. The PDS is based on 36 8-inch photomultiplier tubes (PMTs) and will allow triggering on cosmic rays. The system serves as prototype for the PDS of the final DUNE DP far detector in which the PDS also has the function to allow the 3D event reconstruction on non-beam physics. For this purpose an equalized PMT response is desirable to allow using the same threshold definition for all PMT groups, simplifying the determination of the trigger efficiency. The light calibration system described in this paper is developed to provide this and to monitor the PMT performance in-situ.Comment: 15 pages, 5 figure

Limestone calcined clay binders based on a Belite-rich cement

Portland-based Limestone Calcined Clay Cements, LC3, are receiving considerable attention because the CO2 footprint can be reduced up to 40 %. Here, we report a related family: Belite-rich-LC3. These blends are expected to have very good durability performances. Selected properties for two members are reported including calorimetric data and mechanical strength developments. The phase evolutions are studied by Rietveld analysis backed by the thermal behaviour. Their microstructures are studied by mercury intrusion porosimetry. The hydration rates of these blends have been boosted by C-S-H seeding which led to an increase of mechanical strengths. At 28 days, seeded mortars with cement replacement degrees of 30 and 45 wt% displayed 74 and 61 MPa of compressive strengths, respectively. Moreover, overall porosities and pore entry threshold values decreased in the admixture-containing binders.Financial support from PID2020-114650RB-I00 research grant from the Spanish Government, which is co funded by FEDER, is gratefully acknowledged. The contribution of Mr. Iván González-Fernández to some parts of the experimental section is gratefully acknowledged. Funding for open access charge: Universidad de Málaga / CBUA

Processing and hydration activation of limestone calcined clay belite rich cements.

Belite-rich limestone calcined clay cements, BR-LC3, could be an alternative for low carbon binders with potentially very good durability properties, given the high amount of C-S-H gel from the cement hydration with additional C-(A)-S-H from the pozzolanic reaction. Nevertheless, BR-LC3 phase hydration rates at early ages are slow and they must be enhanced, for instance by using C-S-H nucleation seeding admixtures. In this work, a BR-LC3 binder was prepared using a clinker-activated Belite-rich cement, BC (58 wt%), kaolinitic calcined clay (26 wt%), limestone (13 wt%) and gypsum (3 wt%). Pastes were prepared with a water-to-binder (w/b) ratio of 0.40 and superplasticizer. Mortars were prepared with the w/b=0.40 and having a target slump self-flow of 210±20 mm. Paste hydration characterization was carried out by thermal analysis, Rietveld quantitative phase analysis and mercury intrusion porosimetry. The compressive strengths of the mortars were also determined. Remarkable compressive strength improvements at 7 and 28 days are shown by using a C-S-H seeding admixture. The improvement of mechanical strengths is not related to belite phase hydration acceleration but mainly to lower porosity.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

IFE Plant Technology Overview and contribution to HiPER proposal

HiPER is the European Project for Laser Fusion that has been able to join 26 institutions and signed under formal government agreement by 6 countries inside the ESFRI Program of the European Union (EU). The project is already extended by EU for two years more (until 2013) after its first preparatory phase from 2008. A large work has been developed in different areas to arrive to a design of repetitive operation of Laser Fusion Reactor, and decisions are envisioned in the next phase of Technology Development or Risk Reduction for Engineering or Power Plant facilities (or both). Chamber design has been very much completed for Engineering phase and starting of preliminary options for Reactor Power Plant have been established and review here

Mix and measure II: joint high-energy laboratory powder diffraction and microtomography for cement hydration studies

Portland cements (PCs) and cement blends are multiphase materials of different fineness, and quantitatively analysing their hydration pathways is very chal- lenging. The dissolution (hydration) of the initial crystalline and amorphous phases must be determined, as well as the formation of labile (such as ettringite), reactive (such as portlandite) and amorphous (such as calcium silicate hydrate gel) components. The microstructural changes with hydration time must also be mapped out. To address this robustly and accurately, an innovative approach is being developed based on in situ measurements of pastes without any sample conditioning. Data are sequentially acquired by Mo K�1 laboratory X-ray powder diffraction (LXRPD) and microtomography (mCT), where the same volume is scanned with time to reduce variability. Wide capillaries (2 mm in diameter) are key to avoid artefacts, e.g. self-desiccation, and to have excellent particle averaging. This methodology is tested in three cement paste samples: (i) a commercial PC 52.5 R, (ii) a blend of 80 wt% of this PC and 20 wt% quartz, to simulate an addition of supplementary cementitious materials, and (iii) a blend of 80 wt% PC and 20 wt% limestone, to simulate a limestone Portland cement. LXRPD data are acquired at 3 h and 1, 3, 7 and 28 days, and mCT data are collected at 12 h and 1, 3, 7 and 28 days. Later age data can also be easily acquired. In this methodology, the amounts of the crystalline phases are directly obtained from Rietveld analysis and the amorphous phase contents are obtained from mass-balance calculations. From the mCT study, and within the attained spatial resolution, three components (porosity, hydrated products and unhy- drated cement particles) are determined. The analyses quantitatively demon- strate the filler effect of quartz and limestone in the hydration of alite and the calcium aluminate phases. Further hydration details are discussed.Funding for open access charge: Universidad de Málaga / CBUA

Field scale biodegradation of total petroleum hydrocarbons and soil restoration by Ecopiles: microbiological analysis of the process

Ecopiling is a method for biodegradation of hydrocarbons in soils. It derives from Biopiles, but phytoremediation is added to biostimulation with nitrogen fertilization and bioaugmentation with local bacteria. We have constructed seven Ecopiles with soil heavily polluted with hydrocarbons in Carlow (Ireland). The aim of the study was to analyze changes in the microbial community during ecopiling. In the course of 18 months of remediation, total petroleum hydrocarbons values decreased in 99 and 88% on average for aliphatics and aromatics, respectively, indicating a successful biodegradation. Community analysis showed that bacterial alfa diversity (Shannon Index), increased with the degradation of hydrocarbons, starting at an average value of 7.59 and ending at an average value of 9.38. Beta-diversity analysis, was performed using Bray-Curtis distances and PCoA ordination, where the two first principal components (PCs) explain the 17 and 14% of the observed variance, respectively. The results show that samples tend to cluster by sampling time instead of by Ecopile. This pattern is supported by the hierarchical clustering analysis, where most samples from the same timepoint clustered together. We used DSeq2 to determine the differential abundance of bacterial populations in Ecopiles at the beginning and the end of the treatment. While TPHs degraders are more abundant at the start of the experiment, these populations are substituted by bacterial populations typical of clean soils by the end of the biodegradation process. Similar results are found for the fungal community, indicating that the microbial community follows a succession along the process. This succession starts with a TPH degraders or tolerant enriched community, and finish with a microbial community typical of clean soil

A-DInSAR application in the ground motion analysis: a study case in Asturias (N Spain)

En este trabajo se han aplicado las técnicas A-DInSAR (Interfe rometría SAR Diferencial Avanzadas) para estudiar los movimientos del terreno en el entorno de Boo, Asturias (N España). Para ello se procesaron 57 imágenes SAR del satélite Sentinel-1 A entre febrero de 2018 y enero de 2020 por medio del software PSIG (Persistent Scatterer Interferometry de la División de Geomática del CTTC). Los resultados permitieron identificar velocidades medias de deforma ción en la dirección suelo-satélite (LOS) que van desde –35,9 hasta 13,5 mm/año. Las evidencias detectadas durante el trabajo de cam po han permitido relacionar estas velocidades con movimientos de ladera de pequeñas dimensiones y con patologías estructurales de viviendas y edificaciones. Este estudio pone de manifiesto la utilidad de las técnicas A-DInSAR para el estudio y análisis de estabilidad de laderas en entornos urbanosIn this work, A-DInSAR (Advanced-Differential SAR Interferome try) techniques have been applied to study ground motion in the surroundings of Boo, Asturias (N Spain). For this purpose, 57 SAR images from the Sentinel-1 A satellite were processed between Fe bruary 2018 and January 2020 by means of the PSIG (Persistent Scatterer Interferometry of Geomatics Division of CTTC) software. The results allowed identifying mean deformation velocities in the Line-of-Sight direction (LOS) ranging from –35.9 to 13.5 mm year–1. The evidence detected during the fieldwork has allowed relating the se velocities with small slope movements and structural pathologies of houses and buildings. This study reveals the usefulness of A-DIn SAR techniques for the study and analysis of slope stability in urban environment