475 research outputs found

    Formación y vocación universitarias

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    El planteamiento central es que la formación univer-sitaria en las ciencias instrumentales debe ser un espacio que posibilite la armonización del conocimiento instru-mental, socioambiental y humanístico; así se rompería con la predominancia del conocimiento hiperespecializado, ya sea abriéndose a la complejidad, la interdisciplina o la transdisciplina; a la vez que, en el centro, estaría lo humano como integrante con responsabilidad de lo social y ambiental. Para ello González considera importante que el universitario se reconozca en su condición social, personal y contextual como ciudadano no limitado a la profesión que se cultiva, en un horizonte de acción en el presente para el futuro y en un contexto incierto, ante lo cual debe asumir su responsabilidad.Secretaría de Educación Pública-Subsecretaría de Educación Superior-Dirección General de Educación Superior Universitaria. Número del convenio con la SEP: 2018-15-001-017

    Integrated assessment of the impact of climate and land use changes on groundwater quantity and quality in the Mancha Oriental system (Spain)

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    [EN] Climate and land use change (global change) impacts on groundwater systems cannot be studied in isolation. Land use and land cover (LULC) changes have a great impact on the water cycle and contaminant production and transport. Groundwater flow and storage are changing in response not only to climatic changes but also to human impacts on land uses and demands, which will alter the hydrologic cycle and subsequently impact the quantity and quality of regional water systems. Predicting groundwater recharge and discharge conditions under future climate and land use changes is essential for integrated water management and adaptation. In the Mancha Oriental system (MOS), one of the largest groundwater bodies in Spain, the transformation from dry to irrigated lands during the last decades has led to a significant drop of the groundwater table, with the consequent effect on stream-aquifer interaction in the connected Jucar River. Understanding the spatial and temporal distribution of water quantity and water quality is essential for a proper management of the system. On the one hand, streamflow depletion is compromising the dependent ecosystems and the supply to the downstream demands, provoking a complex management issue. On the other hand, the intense use of fertilizer in agriculture is leading to locally high groundwater nitrate concentrations. In this paper we analyze the potential impacts of climate and land use change in the system by using an integrated modeling framework that consists in sequentially coupling a watershed agriculturally based hydrological model (Soil and Water Assessment Tool, SWAT) with a groundwater flow model developed in MODFLOW, and with a nitrate mass-transport model in MT3DMS. SWAT model outputs (mainly groundwater recharge and pumping, considering new irrigation needs under changing evapotranspiration (ET) and precipitation) are used as MODFLOW inputs to simulate changes in groundwater flow and storage and impacts on stream-aquifer interaction. SWAT and MODFLOW outputs (nitrate loads from SWAT, groundwater velocity field from MODFLOW) are used as MT3DMS inputs for assessing the fate and transport of nitrate leached from the topsoil. Three climate change scenarios have been considered, corresponding to three different general circulation models (GCMs) for emission scenario A1B that covers the control period, and short-, medium-and long-term future periods. A multi-temporal analysis of LULC change was carried out, helped by the study of historical trends (from remote-sensing images) and key driving forces to explain LULC transitions. Markov chains and European scenarios and projections were used to quantify trends in the future. The cellular automata technique was applied for stochastic modeling future LULC maps. Simulated values of river discharge, crop yields, groundwater levels and nitrate concentrations fit well to the observed ones. The results show the response of groundwater quantity and quality (nitrate pollution) to climate and land use changes, with decreasing groundwater recharge and an increase in nitrate concentrations. The sequential modeling chain has been proven to be a valuable assessment tool for supporting the development of sustainable management strategies.This study was partially funded by the EU FP7 GENESIS project (no. 226.536) on groundwater systems, the Plan Nacional de I+D+I 2008-2011 of the Ministry of Science and Innovation of Spain (projects CGL2009-13238-C02-01/02 on climate change impacts and adaptation), and the IMPADAPT project (CGL2013-48424-C2-1-R) with Spanish MINECO (Ministerio de Economia y Competitividad) and Feder funds. We also want to thank SMHI for the climate scenarios provided in the context of the GENESIS project, as well as the anonymous reviewer and the handling editor, for the constructive and helpful review of the paper.Pulido-Velazquez, M.; Peña Haro, S.; García Prats, A.; Mocholí Almudéver, AF.; Henriquez-Dole, L.; Macian-Sorribes, H.; Lopez-Nicolas, A. (2015). Integrated assessment of the impact of climate and land use changes on groundwater quantity and quality in the Mancha Oriental system (Spain). Hydrology and Earth System Sciences. 19(4):1677-1693. https://doi.org/10.5194/hess-19-1677-2015S16771693194Abbaspour, K.: SWAT-CUP 2012: SWAT Calibration and Uncertainty Programs – A User Manual, available at: http://www.neprashtechnology.ca/Downloads/SwatCup/Manual/Usermanual_Swat_Cup.pdf, 2012.Apperl, B., Pulido-Velazquez, M., Andreu, J., and Karjalainen, T. P.: Contribution of the multi-attribute value theory to conflict resolution in groundwater management – application to the Mancha Oriental groundwater system, Spain, Hydrol. Earth Syst. Sci., 19, 1325–1337, https://doi.org/10.5194/hess-19-1325-2015, 2015.Arnold, J. G. and Williams, J. R.: SWRRB – A watershed scale model for soil and water resources management, in: Computer models of watershed hydrology, edited by: Singh, V. P., Water Resources Publications, 847–908, 1995.Arnold, J. G., Srinivasan, R., Muttiah, R. S., and Williams, J. R.: Large area hydrologic modeling and assessment part I: model development, J. Am. Water Resour. As., 34, 73–89, 1998.Arnold, J. G., Moriasi, D. N., Gassman, P. W., Abbaspour, K. C., White, M. J., Srinivasan, R., Santhi, C., Harmel, R. D., van Griensven, A., Van Liew, M. W., Kannan, N., and Jha, M. K.: SWAT: Model Use, Calibration, and Validation, T. ASABE, 55, 1491–1508, 2012.Calera, A., Medrano, J., Vela, A., and Castaño, S.: GIS tools applied to the sustainable management of hydric resources: application to the aquifer system 08-29, Agr. Water Manage., 40, 207–220, 1999.Calera, A., Jochum, A. M., Cuesta, A., Montoro, A., and Lopez, P.: Irrigation management from space: Towards user-friendly products, Irrig. Drain., 19, 337–353, 2005.Calera, A., Osann, A., D'Urso, G., Neale, C., and Moreno, J. M.: Earth Observation for irrigation and river basin management in an operational way: The SPIDER system, IAHS-AISH P., 352, 423–426, 2012.Caballero, S., Voirin-Morel, F., Habets, J., Noilhan, P., LeMoigne, A., and Lehenaff, A. B.: Hydrological sensitivity of the Adour-Garonne river basin to climate change, Water Resour. Res., 43, WO7448, https://doi.org/10.1029/2005WR004192, 2007.Candela, L., von Igel, W., Elorza, F. J., and Aronica, G.: Impact assessment of combined climate and management scenarios on groundwater resources and associated wetland (Majorca, Spain), J. Hydrol., 376, 510–527, 2009.Candela, L., Elorza, F. J., Jiménez-Martínez, J., and von Igel, W.: Global change and agricultural management options for groundwater sustainability, Comput. Electron. Agr., 86, 120–130, 2012.Castaño, S., Sanz, D., and Gómez-Alday, J. J.: Methodology for quantifying 13 groundwater abstractions for agricultura via remote sensing and GIS, Water Resour. Manage., 24, 795–814, 2010.Chaouche, K., Neppel, L., Dieulin, C., Pujol, N., Ladouche, B., Martin, E., Salas, D., and Caballero, Y.: Analyses of precipitation, temperatura and evapotranspiration in a French Mediterranean región in the context of climate change, C.R. Geosci., 342, 234–243, 2010.CHJ: Documento Técnico de Referencia: Evaluación del Estado de las Masas de Agua Superficial y Subterránea, Ámbito territorial de la Confederación Hidrográfica del Júcar, Ministerio de Medio Ambiente y Medio Rural y Marino. Confederación Hidrográfica del Júcar, Spain, 2009a (in Spanish).CHJ: Esquema provisional de Temas Importantes, Ministerio de Medio Ambiente y Medio Rural y Marino. Confederación Hidrográfica del Júcar, Spain, 2009b (in Spanish).CHJ: Memoria del Proyecto del Plan Hidrológico, Ministerio de Medio Ambiente y Medio Rural y Marino, Confederación Hidrográfica del Júcar, Spain, 2013 (in Spanish).Eastman, J. R.: IDRISI Andes, Guide to GIS and image processing Clark University, Worcester, MA, 2006.Ertürk, A., Ekdal, A., Gürel, M., Karakaya, N., Guzel, C., and Gönenç, E.: Evaluating the impact of climate change on groundwater resources in a small Mediterranean watershed, Sci. Total Environ., 499, 437–447, 2014.Feranec, J., Hazeu, G., Soukup, T., and Jaffrain, G.: Determining changes and flows in European landscapes 1990–2000 using CORINE land cover data, Appl. Geogr., 30, 19–35, ISSN 0143-6228, 2010.Gassman, P. W., Reyes, M. R., Green, C. H., and Arnold, J. G.: The Soil and Water Assessment Tool: Historical Development, Applications, and Future Research Directions, T. ASABE, 50, 1211–1250, 2007.Gassman, P. W., Sadeghi, A. M., and Srinivasan, R.: Applications of the SWAT model special section: overview and insights, J. Environ. Qual., 43, 1–8, https://doi.org/10.2134/jeq2013.11.0466, 2014.Henriquez-Dole, L. E.: Escenarios futuros de uso del suelo para el análisis del efecto del cambio global en los recursos hídricos aplicado al acuífero de la Mancha Oriental. Master Thesis dissertation. Universitat Politècnica de València, Spain, 2012 (in Spanish).Holman, I. P., Allen, D. M., Cuthbert, M. O., and Goderniaux, P.: Towards best practice for assessing the impacts of climate change on groundwater, Hydrogeol. J., 20, 1–4, 2012.IGME-DGA: Trabajos de la Actividad 4 "Identificación y caracterización de la interrelación entre aguas subterráneas, cursos fluviales, descargas por manantiales, zonas húmedas y otros ecosistemas naturales de especial interés hídrico", Encomienda de gestión para la realización de trabajos científico-técnicos de apoyo a la sostenibilidad y protección de las aguas subterráneas, Demarcación Hidrográfica del Júcar, Instituto Geológico y Minero de España (Ministerio de Ciencia e Innovación) y Dirección General del Agua (Ministerio de Medio y Medio Rural y Marino), 2010.INE (Instituto Nacional de Estadística): available at: http://www.ine.es, last access: December 2011.Jyrkama, I. M. and Sykes, J. F.: The impact of climate change on spatially varying groundwater recharge in the grand river watershed, J. Hydrol., 338, 237–250, 2007.Kim, N. W., Chung, I. M, Won, Y. S., and Arnold, J. G.: Development and application of the integrated SWAT-MODFLOW model, J. Hydrology, 356, 1–16, 2008.Kingston, D. G. and Taylor, R. G.: Sources of uncertainty in climate change impacts on river discharge and groundwater in a headwater catchment of the Upper Nile Basin, Uganda, Hydrol. Earth Syst. Sci., 14, 1297–1308, https://doi.org/10.5194/hess-14-1297-2010, 2010.Kjellstrom, E., Nikulin, G., Hasson, U., Strandberg, G., and Ullerstig, A.: 21st century changes in the European climate: uncertainties derived from an ensemble of regional climate model simulations, Tellus A, 63, 24–40, 2011.Klijn, J. A., Vullings, L. A. E., van den Berg, M., van Meijl, H., van Lammeren, R., van Rheenen, T., Veldkamp, A., Verburg, P. H., Westhoek, H., and Eickhout, B.: The EURURALIS study: Technical document, Alterra, Wageningen, available at: http://www.eururalis.nl/background.htm (last access: 29 March 2014), 2005.Kløve, B., Ala-Aho, P., Bertrand, G., Gurdak, J. J., Kupfersberger, H., Kvœrner, J., Muotka, T., Mykrä, H., Preda, E., Rossi, P., Uvo, C. B., Velasco, E., and Pulido-Velázquez, M.: Climate Change Impacts on Groundwater and Dependent Ecosystems, J. Hydrol., 518, 250–266, 2014.Lopez-Gunn, E.: The Role of Collective Action in Water Governance: A Comparative 15 Study of Groundwater User Associations in La Mancha Aquifers in Spain, Water 16 International, 28, 367–378, 2003.López Urrea, R., López Córcoles, H., López Fuster, P., Montoro Rodríguez, A., Martín de Santa Olalla Mañas, F., and Calero Martínez, J. A.: Ensayos de programación de riegos en kenaf, trigo blando y bróculi, available at: http://www.itap.es/media/3279/4.programación riegos 2003.pdf (last access: February 2015), 2003.Ma, X., Lu, X. X., van Noordwijk, M., Li, J. T., and Xu, J. C.: Attribution of climate change, vegetation restoration, and engineering measures to the reduction of suspended sediment in the Kejie catchment, southwest China, Hydrol. Earth Syst. Sci., 18, 1979–1994, https://doi.org/10.5194/hess-18-1979-2014, 2014.Mango, L. M., Melesse, A. M., McClain, M. E., Gann, D., and Setegn, S. G.: Land use and climate change impacts on the hydrology of the upper Mara River Basin, Kenya: results of a modeling study to support better resource management, Hydrol. Earth Syst. Sci., 15, 2245–2258, https://doi.org/10.5194/hess-15-2245-2011, 2011.Martin-Benlloch, A.: Obtención de Curvas de Producción y Lixiviado Mediante el Modelo Distribuído GEPIC en Escenarios de Cambio Climático, Degree Dissertation, Universitat Politècnica de València, 2012 (in Spanish).McDonald, M. G. and Harbaugh, A. W.: A modular three-dimensional finite difference groundwater flow model, US Geological Survey Techniques of Water-Resources Investigation Book 6, Chapter A1, 586 pp., 1988.Molina-Navarro, E., Trolle, D., Martínez-Pérez, S., Sastre-Merlín, A., and Jepsen, E.: Hydrological and water quality impact assessment of a Mediterranean limno-reservoir under climate change and land use change scenarios, J. Hydrol., 509, 354–366, 2014.Moratalla, A., Gómez-Alday, J. J., De las Heras, J., Sanz, D., and Castaño, S.: Nitrate in the Water-Supply Wells in the Mancha Oriental Hydrogeological System (SE Spain), Water Resour. Manage., 23, 1621–1640, https://doi.org/10.1007/s11269-008-9344-7, 2009.Nakicenovic, N. and Swart, R. (Eds.): Special Report on Emissions Scenarios, IPCC, Cambridge University Press, Cambridge, UK, 570 pp., 2000.Narula, K. K. and Gosain, A. K.: Modeling hydrology, groundwater recharge and non-point nitrate loadings in the Himalayan Upper Yamuna basin, Sci. Total Environ., 468–469, S102–S116, https://doi.org/10.1016/j.scitotenv.2013.01.022, 2013.Neitsch, S. L., Arnold, J. G., Kiniry, J. R., Srinivasan, R., and Williams, J. R.: Soil and water assessment tool input/output file documentation (version 2005), Temple, Texas: Grassland, Soil and Water Research Laboratory, Agriculture Research Service, Blackland Research Center, Texas Agricultural Experiment Station, 2005.Nikulin, G., Kjellstrom, E., Hasson, U., Strandberg, G., and Ullerstig, A.: Evaluation and future projections of temperature, precipitation and wind extremes over Europe in an ensemble of regional climate simulations, Tellus, 63A, 41–55, 2011.Oñate-Valdivieso, F. and Bosque Sendra, J.: Application of GIS and remote sensing techniques in generation of land use scenarios for hydrological modeling, J. Hydrol., 395, 256–263, 2010.Peña-Haro, S., Llopis-Albert, C., Pulido-Velazquez, M., and Pulido-Velazquez, D.: Fertilizer standards for controlling groundwater nitrate pollution from agriculture: El Salobral-Los Llanos case study, Spain, J. Hydrol., 392, 174–187, 2010.Peña-Haro, S., García-Prats, A., and Pulido-Velazquez, M.: Influence of soil and climate heterogeneity on the performance of economic instruments for reducing nitrate leaching from agriculture, Sci. Total Environ., 499, 510–519, https://doi.org/10.1016/j.scitotenv.2014.07.029, 2014.Pulido-Velazquez, D., García-Aróstegui, J. L., Molina, J. L., and Pulido-Velazquez, M.: Assessment of future groundwater recharge in semi-arid regions under climate change scenarios (Serral-Salinas aquifer, SE Spain). Could increased rainfall variability increase the recharge rate?, Hydrol. Process., 29, 828–844, https://doi.org/10.1002/hyp.10191, 2015.Reifen, C. and Toumi, R.: Climate projections: Past performance no guarantee of future skill?, Geophys. Res. Lett., 36, L13704, https://doi.org/10.1029/2009GL038082, 2009.Rienks, W. A. (Ed.): The future of rural Europe, An anthology based on the results of the Eururalis 2.0 scenario study. Wageningen UR and Netherlands Environmental Assesment Agency (MNP), Wageningen and Vilthoben, the Netherlands, 2007.Sanz, D.: Contribución a la caracterización geométrica de las unidades hidrogeológicas que integran el sistema de acuíferos de la Mancha oriental [Contribution to the geometrical characterization of the hydrogeological unit which forms the Mancha Oriental aquifers system], PhD Thesis, Univ. Complutense de Madrid, Spain, 2005 (in Spanish).Sanz, D., Gómez-Alday, J. J., Castaño, S., Moratalla, A., De las Heras, L., and Martínez Alfaro, P. P.: Hydrostratigraphic framework and hydrogeological behaviour of the Mancha Oriental System (SE Spain), Hydrogeol. J., 17, 1375–1391, 2009.Sanz, D., Castaño, S., Cassiraga, E., Sahuquillo, A., Gómez-Alday, J. J., Peña, S., and Calera, A.: Modeling aquifer-river interactions under the influence of groundwater abstraction in the Mancha Oriental System (SE Spain), Hydrogeol. J., 19, 475–487, 2011.Seiller, K. P. and Gat, J. R.: Groundwater Recharge from Run-off, Infiltration and Percolation. Series: Water Science and Technology Library, Vol. 55, 2007.Shrestha, B., Babel, M. S., Maskey, S., van Griensven, A., Uhlenbrook, S., Green, A., and Akkharath, I.: Impact of climate change on sediment yield in the Mekong River basin: a case study of the Nam Ou basin, Lao PDR, Hydrol. Earth Syst. Sci., 17, 1–20, https://doi.org/10.5194/hess-17-1-2013, 2013.Sophocleous, M. and Perkins, S. P.: Methodology and application of combined watershed and ground-water models in Kansas, J. Hydrol., 236, 185–201, 2000.Stuart, M. E., Goody, D. C., Bllomfield, J. P., and Williams, A. T.: A review of the impact of climate change on future nitrate concentrations in groundwater of the UK, Sci. Total Environ., 409, 2859–2873, 2011.Teutschbein, C. and Seibert, J.: Bias correction of regional climate model simulations for hydrological climate-change impact studies: Review and evaluation of different methods, J. Hydrol., 456–457, 12–29, 2012.Westhoek, H. J., van den Berg, M., and Bakkes, J. A.: Scenario development to explore the future of Europe's rural areas, Agr. Ecosyst. Environ., 114, 7–20, 2006.Williams, J. R.: Flood routing with variable travel time or variable storage coefficients, T. ASAE, 12, 100–103, 1969.Xu, H., Taylor, R. G., and Xu, Y.: Quantifying uncertainty in the impacts of climate change on river discharge in sub-catchments of the Yangtze and Yellow River Basins, China, Hydrol. Earth Syst. Sci., 15, 333–344, https://doi.org/10.5194/hess-15-333-2011, 2011.Zheng, C. and Wang, P. P.: MT3DMS: a modular three-dimensional multispecies transport model for simulation of advection, dispersion, and chemical reactions of contaminants in groundwater systems; documentation and user's guide SERDP-99-1, Washington, DC, US Army Corps of Engineers, 1999

    Therapeutic Effect of a Novel Oxazolidinone, DA-7867, in BALB/c Mice Infected with Nocardia brasiliensis

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    Actinomycetoma is an infectious disease of tropical and subtropical regions produced by actinobacteria of the genera Nocardia, Streptomyces, and Actinomadura. Therapeutic alternatives are scarce and include trimethoprim-sulfamethoxazole, diaminodiphenylsulfone, amoxicillin-clavulanate, imipenem, and amikacin. Oxazolidinones are a new class of antimicrobials with a completely different cellular target; the first compound in the market, linezolid, was introduced in the year 2000. It is active against many species of Nocardia and other aerobic actinomycetes; however, the long-term application in human subjects produces side effects including peripheral neuropathy and mielossupression. Therefore, it is important to screen other oxazolidinones with higher activity and less toxicity. In the present work, we tested DA-7867, a new oxazolidinone, in an experimental mouse model. The drug is active in vivo and decreases the production of lesions using only one dose a day in contrast to linezolid, which needs to be injected three times a day. Although it was tested on N. brasiliensis, it can possibly be active (once it is accepted for its use in humans) against Actinomadura spp and Streptomyces spp, which are frequently found in places of Africa and India where actinomycetoma is also an important consult in dermatology

    Monitoring the Morphology of M87* in 2009–2017 with the Event Horizon Telescope

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    The Event Horizon Telescope (EHT) has recently delivered the first resolved images of M87*, the supermassive black hole in the center of the M87 galaxy. These images were produced using 230 GHz observations performed in 2017 April. Additional observations are required to investigate the persistence of the primary image feature—a ring with azimuthal brightness asymmetry—and to quantify the image variability on event horizon scales. To address this need, we analyze M87* data collected with prototype EHT arrays in 2009, 2011, 2012, and 2013. While these observations do not contain enough information to produce images, they are sufficient to constrain simple geometric models. We develop a modeling approach based on the framework utilized for the 2017 EHT data analysis and validate our procedures using synthetic data. Applying the same approach to the observational data sets, we find the M87* morphology in 2009–2017 to be consistent with a persistent asymmetric ring of ~40 μas diameter. The position angle of the peak intensity varies in time. In particular, we find a significant difference between the position angle measured in 2013 and 2017. These variations are in broad agreement with predictions of a subset of general relativistic magnetohydrodynamic simulations. We show that quantifying the variability across multiple observational epochs has the potential to constrain the physical properties of the source, such as the accretion state or the black hole spin

    Penilaian Kinerja Keuangan Koperasi di Kabupaten Pelalawan

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    This paper describe development and financial performance of cooperative in District Pelalawan among 2007 - 2008. Studies on primary and secondary cooperative in 12 sub-districts. Method in this stady use performance measuring of productivity, efficiency, growth, liquidity, and solvability of cooperative. Productivity of cooperative in Pelalawan was highly but efficiency still low. Profit and income were highly, even liquidity of cooperative very high, and solvability was good

    Juxtaposing BTE and ATE – on the role of the European insurance industry in funding civil litigation

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    One of the ways in which legal services are financed, and indeed shaped, is through private insurance arrangement. Two contrasting types of legal expenses insurance contracts (LEI) seem to dominate in Europe: before the event (BTE) and after the event (ATE) legal expenses insurance. Notwithstanding institutional differences between different legal systems, BTE and ATE insurance arrangements may be instrumental if government policy is geared towards strengthening a market-oriented system of financing access to justice for individuals and business. At the same time, emphasizing the role of a private industry as a keeper of the gates to justice raises issues of accountability and transparency, not readily reconcilable with demands of competition. Moreover, multiple actors (clients, lawyers, courts, insurers) are involved, causing behavioural dynamics which are not easily predicted or influenced. Against this background, this paper looks into BTE and ATE arrangements by analysing the particularities of BTE and ATE arrangements currently available in some European jurisdictions and by painting a picture of their respective markets and legal contexts. This allows for some reflection on the performance of BTE and ATE providers as both financiers and keepers. Two issues emerge from the analysis that are worthy of some further reflection. Firstly, there is the problematic long-term sustainability of some ATE products. Secondly, the challenges faced by policymakers that would like to nudge consumers into voluntarily taking out BTE LEI

    Clonal chromosomal mosaicism and loss of chromosome Y in elderly men increase vulnerability for SARS-CoV-2

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    The pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2, COVID-19) had an estimated overall case fatality ratio of 1.38% (pre-vaccination), being 53% higher in males and increasing exponentially with age. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, we found 133 cases (1.42%) with detectable clonal mosaicism for chromosome alterations (mCA) and 226 males (5.08%) with acquired loss of chromosome Y (LOY). Individuals with clonal mosaic events (mCA and/or LOY) showed a 54% increase in the risk of COVID-19 lethality. LOY is associated with transcriptomic biomarkers of immune dysfunction, pro-coagulation activity and cardiovascular risk. Interferon-induced genes involved in the initial immune response to SARS-CoV-2 are also down-regulated in LOY. Thus, mCA and LOY underlie at least part of the sex-biased severity and mortality of COVID-19 in aging patients. Given its potential therapeutic and prognostic relevance, evaluation of clonal mosaicism should be implemented as biomarker of COVID-19 severity in elderly people. Among 9578 individuals diagnosed with COVID-19 in the SCOURGE study, individuals with clonal mosaic events (clonal mosaicism for chromosome alterations and/or loss of chromosome Y) showed an increased risk of COVID-19 lethality

    Search for stop and higgsino production using diphoton Higgs boson decays

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    Results are presented of a search for a "natural" supersymmetry scenario with gauge mediated symmetry breaking. It is assumed that only the supersymmetric partners of the top-quark (stop) and the Higgs boson (higgsino) are accessible. Events are examined in which there are two photons forming a Higgs boson candidate, and at least two b-quark jets. In 19.7 inverse femtobarns of proton-proton collision data at sqrt(s) = 8 TeV, recorded in the CMS experiment, no evidence of a signal is found and lower limits at the 95% confidence level are set, excluding the stop mass below 360 to 410 GeV, depending on the higgsino mass

    Differential cross section measurements for the production of a W boson in association with jets in proton–proton collisions at √s = 7 TeV

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    Measurements are reported of differential cross sections for the production of a W boson, which decays into a muon and a neutrino, in association with jets, as a function of several variables, including the transverse momenta (pT) and pseudorapidities of the four leading jets, the scalar sum of jet transverse momenta (HT), and the difference in azimuthal angle between the directions of each jet and the muon. The data sample of pp collisions at a centre-of-mass energy of 7 TeV was collected with the CMS detector at the LHC and corresponds to an integrated luminosity of 5.0 fb[superscript −1]. The measured cross sections are compared to predictions from Monte Carlo generators, MadGraph + pythia and sherpa, and to next-to-leading-order calculations from BlackHat + sherpa. The differential cross sections are found to be in agreement with the predictions, apart from the pT distributions of the leading jets at high pT values, the distributions of the HT at high-HT and low jet multiplicity, and the distribution of the difference in azimuthal angle between the leading jet and the muon at low values.United States. Dept. of EnergyNational Science Foundation (U.S.)Alfred P. Sloan Foundatio

    Severe early onset preeclampsia: short and long term clinical, psychosocial and biochemical aspects

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    Preeclampsia is a pregnancy specific disorder commonly defined as de novo hypertension and proteinuria after 20 weeks gestational age. It occurs in approximately 3-5% of pregnancies and it is still a major cause of both foetal and maternal morbidity and mortality worldwide1. As extensive research has not yet elucidated the aetiology of preeclampsia, there are no rational preventive or therapeutic interventions available. The only rational treatment is delivery, which benefits the mother but is not in the interest of the foetus, if remote from term. Early onset preeclampsia (<32 weeks’ gestational age) occurs in less than 1% of pregnancies. It is, however often associated with maternal morbidity as the risk of progression to severe maternal disease is inversely related with gestational age at onset2. Resulting prematurity is therefore the main cause of neonatal mortality and morbidity in patients with severe preeclampsia3. Although the discussion is ongoing, perinatal survival is suggested to be increased in patients with preterm preeclampsia by expectant, non-interventional management. This temporising treatment option to lengthen pregnancy includes the use of antihypertensive medication to control hypertension, magnesium sulphate to prevent eclampsia and corticosteroids to enhance foetal lung maturity4. With optimal maternal haemodynamic status and reassuring foetal condition this results on average in an extension of 2 weeks. Prolongation of these pregnancies is a great challenge for clinicians to balance between potential maternal risks on one the eve hand and possible foetal benefits on the other. Clinical controversies regarding prolongation of preterm preeclamptic pregnancies still exist – also taking into account that preeclampsia is the leading cause of maternal mortality in the Netherlands5 - a debate which is even more pronounced in very preterm pregnancies with questionable foetal viability6-9. Do maternal risks of prolongation of these very early pregnancies outweigh the chances of neonatal survival? Counselling of women with very early onset preeclampsia not only comprises of knowledge of the outcome of those particular pregnancies, but also knowledge of outcomes of future pregnancies of these women is of major clinical importance. This thesis opens with a review of the literature on identifiable risk factors of preeclampsia
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