65 research outputs found
Radio interference analysis tool based on GNU Radio
Avoiding interference is one of the main challenges in radio communications. Interference hunting is usually done with costly instruments. In this work, a cost efficient portable tool is described for interference analysis that is based on software defined radio. A generic radio board implements the RF front end, while flexible signal processing is carried out on a personal computer. The proposed tool analyses spectrum characteristics spanning from 70 MHz to 6 GHz band, detects radio interference signals and helps to identify the type of radio technology used by the source transmitter.Universidad de MĂĄlaga. Campus de Excelencia Internacional AndalucĂa Tech
Viability, method and device for horticultural crops with brackish and marine water
The method that humanity has adopted to hydrate and thus give life to the plants, imitating the model that was most visible, is the rain. However, the great secret to the contribution of nutrients to the vegetables, the irrigation itself, is on earth, in the groundwater layers and aquifers that hoard and administer the water, keeping every drop of rain and distributing the water through the basins, underground rivers, watering indirectly from the mountain to the sea. The key is in the different circulation velocities of the groundwater because of the nature of the substrates. However, agriculture has taken irrigation from above as we know it and has focused especially on drainage capacity. From this point of view, saline water is not beneficial for irrigated agriculture, but may be the only source of irrigation water in large arid regions, especially in developing countries, where the extreme scarcity of freshwater and the rapidly growing population require more water. When considering the possibility of watering with seawater without desalinating, always by means of capillarity systems, it is essential to take into consideration the different strata of soils, the distance to the groundwater, the composition of seawater, the capacity of drainage, chemical reactions of the soil with salts, etc. The modification of any of these parameters can produce effects of salinization, loss of humidity or desertification among others. This study presents the accumulated experience through the joint collaboration between the Centre for Research in Security and food Control of the Polytechnic University of Catalonia (CRESCA) and the Aqua Maris Foundation in capillary irrigation and it proposes a system and device that allows the controlled development of different vegetal species using brackish and seawaterPostprint (published version
Artificial Magnetic Bacteria: Living Magnets at Room Temperature
"This is the peer reviewed version of the following article: MartĂn Marcos, M.A.; et al. Artificial Magnetic Bacteria: Living Magnets at Room Temperature. Advanced Functional Materials, 24(23): 3489-3493 (2014), which has been published in final form at http://dx.doi.org/10.1002/adfm.201303754 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving."Biogenic magnetite is a fascinating example of how nature can generate functional magnetic nanostructures. Inspired by the magnetic bacteria, an attempt is made to mimic their magnetic properties, rather than their structures, to create living magnets at room temperature. The non-magnetic probiotic bacteria Lactobacillus fermentum and Bifidobacteria breve are used as bioplatforms to densely arrange superparamagnetic nanoparticles on their external surfaces, thus obtaining the artificial magnetic bacteria. Magnetic probiotic bacteria can be produced by using superparamagnetic maghemite nanoparticles assembled at their surfaces. They present a collective ferromagnetic phase at room temperature. The blocking temperature of these maghemite nanoparticles increases more than 100 K when assembled at the artificial magnetic bacteria.This work was funded by Biosearch S. A. (POSTBIO project-Agency for Innovation and Development of Andalucia IDEA) and by MINECO and FEDER (project CTQ2012â32236)
Instrumento de evaluaciĂłn del programa de democracia participativa Ăgora infantil
En el presente documento se detalla los instrumentos construidos para la evaluaciĂłn del programa de democracia participativa Ăgora Infantil (AI). Esta polĂtica es analiza para conocer sus efectos psicosociales por un equipo interdisciplinar de la Universidad de MĂĄlaga y de la Universidad de Huelva tal y como figura en el contrato 8.07/5.38.4408. En el presente documento se detallan los instrumentos utilizados por el equipo de investigaciĂłn, asegurando asĂ su registro. Por lo tanto, el uso parcial o total de los mismo requerirĂa la cita de la correspondiente autorĂa
Ultrathin Plasma Polymer Passivation of Perovskite Solar Cells for Improved Stability and Reproducibility
Despite the youthfulness of hybrid halide perovskite solar cells, their efficiencies are currently comparable to commercial silicon and have surpassed quantum-dots solar cells. Yet, the scalability of these devices is a challenge due to their low reproducibility and stability under environmental conditions. However, the techniques reported to date to tackle such issues recurrently involve the use of solvent methods that would further complicate their transfer to industry. Herein a reliable alternative relaying in the implementation of an ultrathin plasma polymer as a passivation interface between the electron transport layer and the hybrid perovskite layer is presented. Such a nanoengineered interface provides solar devices with increased long-term stability under ambient conditions. Thus, without involving any additional encapsulation step, the cells retain more than 80% of their efficiency after being exposed to the ambient atmosphere for more than 1000 h. Moreover, this plasma polymer passivation strategy significantly improves the coverage of the mesoporous scaffold by the perovskite layer, providing the solar cells with enhanced performance, with a champion efficiency of 19.2%, a remarkable value for Li-free standard mesoporous n-i-p architectures, as well as significantly improved reproducibility
Introduction to advances in construction and demolition waste
Resource efficiency, as well as the importance and limitations of the Circular economy concept, are highlighted. The case of construction and demolition waste-CDW recycling is introduced. The 70% recycling rate for EU in 2020 is analyzed and a literature review on the Waste Framework Directive is carried out. Brief comments on CDW containing hazardous substances are made. A book outline is included
Comparative LCA of concrete with recycled aggregates: a circular economy mindset in Europe
[EN] Purpose Construction and demolition waste (C&DW) is the largest waste stream in the European Union (EU) and all over the
world. Proper management of C&DW and recycled materialsÂżincluding the correct handling of hazardous wasteÂżcan have
major benefits in terms of sustainability and the quality of life. The Waste Framework Directive 2008/98/EC aims to have 70% of
C&DW recycled by 2020. However, except for a few EU countries, only about 50% of C&DW is currently being recycled. In the
present research, the environmental impact of concrete with recycled aggregates and with geopolymer mixtures is analysed. The
aim of the present research is to propose a comparative LCA of concrete with recycled aggregates in the context of European
politics.
Methods Life cycle assessment (LCA) methodology is applied using Simapro© software. A cradle to grave analysis is carried
out. The results are analysed based on the database Ecoinvent 3.3 and Impact 2002+.
Results Results show that the concrete with 25% recycled aggregates is the best solution from an environmental point of view.
Furthermore, geopolymer mixtures could be a valid alternative to reduce the phenomenon of Âżglobal warmingÂż; however, the
production of sodium silicate and sodium hydroxide has a great environmental impact.
Conclusions A possible future implementation of the present study is certainly to carry out an overall assessment and to
determine the most cost-effective option among the different competing alternatives through the life cycle cost analysis.Colangelo, F.; GĂłmez-Navarro, T.; Farina, I.; Petrillo, A. (2020). Comparative LCA of concrete with recycled aggregates: a circular economy mindset in Europe. International Journal of Life Cycle Assessment. 25(9):1790-1804. https://doi.org/10.1007/s11367-020-01798-6S17901804259Akhtar A, Sarmah (2018) Construction and demolition waste generation and properties of recycled aggregate concrete: a global perspective. J Cleaner Prod 186:262â281Bare JC, Hofstetter P, Penningtonne DW, Helias A, de Haes U (2000) Midpoints versus endpoints: the sacrifices and benefits. Int J Life Cycle Assess 5(6):319â326Blengini GA, Garbarino E (2010) Resources and waste management in Turin (Italy): the role of recycled aggregates in the sustainable supply mix. J Clean Prod 18(10â11):1021â1030Blengini GA, Garbarino E, Ć olar S, Shields DJ, HĂĄmor T, Vinai R, Agioutantis Z (2012) Life cycle assessment guidelines for the sustainable production and recycling of aggregates: the sustainable aggregates resource management project (SARMa). J Clean Prod 27:177â181Blengini GA, Garbarino E, Bevilacqua P (2017) Sustainability and integration between mineral resources and C&DW management: overview of key issues towards a resource-efficient Europe. Env Eng Man J 16(2):493â502Borghi G, Pantini S, Rigamonti L (2018) Life cycle assessment of non-hazardous construction and demolition waste (CDW) management in Lombardy region (Italy). J Clean Prod 184:815â825Braga AM, Silvestre JD, de Brito J (2017) Compared environmental and economic impact from cradle to gate of concrete with natural and recycled coarse aggregates. J Clean Prod 162:529â543Chen C, Habert G, Bouzidi Y, Jullien A, Ventura A (2010) LCA allocation procedure used as an incitative method for waste recycling: an application to mineral additions in concrete. Res Con Rec 54(12):1231â1240Chen Z, Gu H, Bergman RD, Liang S (2020) Comparative life-cycle assessment of a high-rise mass timber building with an equivalent reinforced concrete alternative using the Athena impact estimator for buildings. Sustainability (Switzerland) 12(11):4708Colangelo F, Cioffi R (2017) Mechanical properties and durability of mortar containing fine fraction of demolition wastes produced by selective demolition in South Italy. Comp Part B: Eng 115:43â50Colangelo F, Petrillo A, Cioffi R, Borrelli C, Forcina A (2018a) Life cycle assessment of recycled concretes: a case study in southern Italy. Sci Total Env 615:1506â1517Colangelo F, Forcina A, Farina I, Petrillo A (2018b) Life cycle assessment (LCA) of different kinds of concrete containing waste for sustainable construction. Buildings 8(5):70Colangelo F, Navarro TG, Petrillo A, Farina I, Cioffi R (2020) Life-cycle impact of concrete with recycled materials. Encyclopedia of Renewable and Sustainable Materials, Volume 5(2020):414â421COM (2012) 433, COMMUNICATION FROM THE COMMISSION TO THE EUROPEAN PARLIAMENT AND THE COUNCIL Strategy for the sustainable competitiveness of the construction sector and its enterprises, http://eur-lex.europa.eu/procedure/EN/201859, Brussels, 31.7.2012, COM(2012) 433 finalCOM (2014) 445, COMMUNICATION FROM THE COMMISSION TO THE EUROPEAN PARLIAMENT AND THE COUNCIL, http://ec.europa.eu/environment/eussd/pdf/SustainableBuildingsCommunication.pdf, Brussels, 1.7.2014 COM(2014) 445 finalDavidovits J (2018) Geopolymers based on natural and synthetic metakaolin a critical review. Ceramic Eng Science Proc 38(3):201â214Di Maria A, Eyckmans J, Van Acker K (2018) Downcycling versus recycling of construction and demolition waste: combining LCA and LCC to support sustainable policy making. Waste Man 75:3â21Directive 2008/98/EC on waste (Waste Framework Directive), http://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32008L0098EN 1992-1-1:(2004) Eurocode 2: Design of concrete structures - Part 1â1: General rules and rules for buildingsEstanqueiro B, Dinis Silvestre J, de Brito J, Duarte Pinheiro M (2018) Environmental life cycle assessment of coarse natural and recycled aggregates for concrete. Eur J Env Civ Eng 22(4):429â449Etxeberria M, VĂĄzquez E, MarĂ A, Barra M (2007) Influence of amount of recycled coarse aggregates and production process on properties of recycled aggregate concrete. Cem Conc Res 37(5):735â742EU construction & demolition waste management protocol (2016) BrusselsGĂĄlvez-Martos J-L, Styles D, Schoenberger H, Zeschmar-Lahl B (2018) Construction and demolition waste best management practice in Europe. Res Con Rec 136:166â178Gluth, G.J.G., Arbi, K., Bernal, S.A., Bondar, D., Castel, A., Chithiraputhiran, S., Dehghan, A., Dombrowski-Daube, K., Dubey, A., Ducman, V., Peterson, K., Pipilikaki, P., Valcke, S.L.A., Ye, G., Hajimohammadi, A., van Deventer, J.S.J., 2017. Characterisation of one-part geopolymer binders made from fly ash. Waste Biom Val, 8(1), pp. 225â233Gomes R, Silvestre JD, de Brito J (2020) Environmental, economic and energy life cycle assessment âfrom cradle to cradleâ (3E-C2C) of flat roofs. Journal of Building Engineering 32:101436ISO 14040 (2006) Environmental management life cycle assessment. Principles and Framework. ISO, GenevaISO 14044 (2006) Environmental management. Life cycle assessment. Requirements and Guidelines. ISO, GenevaJafary Nasab T, Monavari SM, Jozi SA, Majedi H (2020) Assessment of carbon footprint in the construction phase of high-rise constructions in Tehran. Int J Environ Sci Technol 17(6):3153â3164Jolliet O, Margni M, Charles R, Humbert S, Payet J, Rebitzer G, Rosenbaum R (2003) Impact 2002+: a new life cycle impact assessment methodology. Int J Life Cycle Assess 8(6):324â333Khan MW, Ali Y, De Felice F, Salman A, Petrillo A (2019) Impact of brick kilns industry on environment and human health in Pakistan. Sci Total Environ 678:383â389Knoeri C, SanyĂ©-Mengual E, Althaus H-J (2013) Comparative LCA of recycled and conventional concrete for structural applications. Int J Life Cycle Assess 18(5):909â918Lu W, Yan H (2011) A framework for understanding waste management studies in construction. Waste Man 31:1252â1260MarinkoviÄ S, Radonjanin V, MaleĆĄev M, IgnjatoviÄ I (2010) Comparative environmental assessment of natural and recycled aggregate concrete. Waste Man 30(11):2255â2264Mercante IT, Bovea MD, Ibåñez-ForĂ©s V, Arena AP (2012) Life cycle assessment of construction and demolition waste management systems: a Spanish case study. Int J Life Cycle Assess 17(2):232â241Pantini S, Giurato M, Rigamonti L (2019) A LCA study to investigate resource-efficient strategies for managing post-consumer gypsum waste in Lombardy region (Italy). Res Con Rec 147:157â168Petrillo A, Cioffi R, De Felice F, Colangelo F, Borrelli C (2016) An environmental evaluation: a comparison between geopolymer and OPC concrete paving blocks manufacturing process in Italy. Env Prog Sus Energy 35(6):1699â1708Provis JL (2017) Alkali-activated cementitious materials and concretes - steps towards standardization, American Concrete Inst, ACI Special Publication 2017-January (SP 320), pp. 444-448Sayagh S, Ventura A, Hoang T, François D (2010) Sensitivity of the LCA allocation procedure for BFS recycled into pavement structures. Res cons rec 54(6):348â358Tangtinthai N, Heidrich O, Manning DAC (2019) Role of policy in managing mined resources for construction in Europe and emerging economies. J Env Man 236:613â621ToĆĄiÄ N, MarinkoviÄ S, DaĆĄiÄ T, StaniÄ M (2015) Multicriteria optimization of natural and recycled aggregate concrete for structural use. J Clean Prod 87(1):766â776Van den Heede P, De Belie N (2012) Environmental impact and life cycle assessment (LCA) of traditional and âgreenâ concretes: literature review and theoretical calculations. Cem Conc Comp 34(4):431â442Vossberg C, Mason-Jones K, Cohen B (2014) An energetic life cycle assessment of C&D waste and container glass recycling in Cape Town, South Africa. Res Con Rec 88:39â49Walling SA, Notman S, Watts P, Govan N, Provis JL (2019) Portland cement based immobilization/destruction of chemical weapon agent degradation products. Industrial Eng Chemistry Res 58(24):10383â10393Wu H, Zuo J, Yuan H, Zillante G, Wang J (2019) A review of performance assessment methods for construction and demolition waste management. Res Cons Recycling 150:104407Zhang C, Hu M, Dong L, Gebremariam A, Mirand-Xicotencatl B, Di Maio F, Tukker A (2019) Eco-efficiency assessment of technological innovations in high-grade concrete recycling. Res Cons Recycling 149:649â66
Treatment with tocilizumab or corticosteroids for COVID-19 patients with hyperinflammatory state: a multicentre cohort study (SAM-COVID-19)
Objectives: The objective of this study was to estimate the association between tocilizumab or corticosteroids and the risk of intubation or death in patients with coronavirus disease 19 (COVID-19) with a hyperinflammatory state according to clinical and laboratory parameters.
Methods: A cohort study was performed in 60 Spanish hospitals including 778 patients with COVID-19 and clinical and laboratory data indicative of a hyperinflammatory state. Treatment was mainly with tocilizumab, an intermediate-high dose of corticosteroids (IHDC), a pulse dose of corticosteroids (PDC), combination therapy, or no treatment. Primary outcome was intubation or death; follow-up was 21 days. Propensity score-adjusted estimations using Cox regression (logistic regression if needed) were calculated. Propensity scores were used as confounders, matching variables and for the inverse probability of treatment weights (IPTWs).
Results: In all, 88, 117, 78 and 151 patients treated with tocilizumab, IHDC, PDC, and combination therapy, respectively, were compared with 344 untreated patients. The primary endpoint occurred in 10 (11.4%), 27 (23.1%), 12 (15.4%), 40 (25.6%) and 69 (21.1%), respectively. The IPTW-based hazard ratios (odds ratio for combination therapy) for the primary endpoint were 0.32 (95%CI 0.22-0.47; p < 0.001) for tocilizumab, 0.82 (0.71-1.30; p 0.82) for IHDC, 0.61 (0.43-0.86; p 0.006) for PDC, and 1.17 (0.86-1.58; p 0.30) for combination therapy. Other applications of the propensity score provided similar results, but were not significant for PDC. Tocilizumab was also associated with lower hazard of death alone in IPTW analysis (0.07; 0.02-0.17; p < 0.001).
Conclusions: Tocilizumab might be useful in COVID-19 patients with a hyperinflammatory state and should be prioritized for randomized trials in this situatio
A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)
Meeting abstrac
¿Qué queda de m�
Este libro es una reclamacioÌn a quienes hemos sido, somos o seremos docentes. A quienes no hemos respetado a las personas que se han puesto junto a nosotros y nosotras, confiando su bien maÌs preciado: la libertad. Estas paÌginas denuncian cada vez que convertimos una visioÌn en la visioÌn, una emocioÌn en la emocioÌn, un saber en el saber, un comportamiento en el comportamiento. Es un grito contra la imposicioÌn, la normalizacioÌn, la neutralizacioÌn y la universalizacioÌn de una perspectiva particular. Una pugna contra cada proceso que no se ha conectado con las vidas de los aprendices.
Un texto colaborativo realizado por alumnado de EducacioÌn y Cambio Social en el Grado en EducacioÌn Infantil de la Universidad de MaÌlaga y coordinado por Ignacio CalderoÌn Almendros
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