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  • 13. Climate action
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  • 2. Zero hunger

  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: orcid Beatriz Fidalgo;
    Beatriz Fidalgo
    ORCID
    Harvested from ORCID Public Data File

    Beatriz Fidalgo in OpenAIRE
    Sai Gu; Mobolaji Shemfe; Mobolaji Shemfe;

    Biofuels have been identified as a mid-term GHG emission abatement solution for decarbonising the transport sector. This study examines the techno-economic analysis of biofuel production via biomass fast pyrolysis and subsequent bio-oil upgrading via zeolite cracking. The aim of this study is to compare the techno-economic feasibility of two conceptual catalyst regeneration configurations for the zeolite cracking process: (i) a two-stage regenerator operating sequentially in partial and complete combustion modes (P-2RG) and (ii) a single stage regenerator operating in complete combustion mode coupled with a catalyst cooler (P-1RGC). The designs were implemented in Aspen Plus® based on a hypothetical 72 t/day pine wood fast pyrolysis and zeolite cracking plant and compared in terms of energy efficiency and profitability. The energy efficiencies of P-2RG and P-1RGC were estimated at 54% and 52%, respectively with corresponding minimum fuel selling prices (MFSPs) of £7.48/GGE and £7.20/GGE. Sensitivity analysis revealed that the MFSPs of both designs are mainly sensitive to variations in fuel yield, operating cost and income tax. Furthermore, uncertainty analysis indicated that the likely range of the MFSPs of P-1RGC (£5.81/GGE  £11.63/GGE) at 95% probability was more economically favourable compared with P-2RG, along with a penalty of 2% reduction in energy efficiency. The results provide evidence to support the economic viability of biofuel production via zeolite cracking of pyrolysis-derived bio-oil.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Cranfield University...arrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Biomass and Bioenergy
    Article . 2017 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Biomass and Bioenergy
    Article
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    Data sources: UnpayWall
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Biomass and Bioenergy
    Article . 2017
    License: CC BY
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Cranfield CERES
    Article . 2017
    License: CC BY NC ND
    Data sources: Cranfield CERES
    Surrey Research Insight
    Article . 2017 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Cranfield University...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Biomass and Bioenergy
      Article . 2017 . Peer-reviewed
      License: CC BY
      Data sources: Crossref
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Biomass and Bioenergy
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      License: CC BY
      Data sources: UnpayWall
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Biomass and Bioenergy
      Article . 2017
      License: CC BY
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Cranfield CERES
      Article . 2017
      License: CC BY NC ND
      Data sources: Cranfield CERES
      Surrey Research Insight
      Article . 2017 . Peer-reviewed
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Beatrice Beccagutti; orcid Lorenzo Cafiero;
    Lorenzo Cafiero
    ORCID
    Harvested from ORCID Public Data File

    Lorenzo Cafiero in OpenAIRE
    Massimiliana Pietrantonio; Stefano Pucciarmati; +2 Authors

    Bromine and chlorine are almost ubiquitous in waste of electrical and electronic equipment (WEEE) and the knowledge of their content in the plastic fraction is an essential step for proper end of life management. The aim of this study is to compare the following analytical methods: energy dispersive X-ray fluorescence spectroscopy (ED-XRF), ion chromatography (IC), ion-selective electrodes (ISEs), and elemental analysis for the quantitative determination of chlorine and bromine in four real samples taken from different WEEE treatment plants, identifying the best analytical technique for waste management workers. Home-made plastic standard materials with known concentrations of chlorine or bromine have been used for calibration of ED-XRF and to test the techniques before the sample analysis. Results showed that IC and ISEs, based upon dissolution of the products of the sample combustion, have not always achieved a quantitative absorption of the analytes in the basic solutions and that bromine could be underestimated since several oxidation states occur after combustion. Elemental analysis designed for chlorine determination is subjected to strong interference from bromine and required frequent regeneration and recalibration of the measurement cell. The most reliable method seemed to be the non-destructive ED-XRF. Calibration with home-made standards, having a similar plastic matrix of the samples, enabled us to carry out quantitative determinations, which have been revealed to be satisfactorily accurate and precise. In all the analyzed samples a total concentration of chlorine and/or bromine between 0.6 and 4 w/w% was detected, compromising the feasibility of a mechanical recycling and suggesting the exploration of an alternative route for managing these plastic wastes.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Sustainabilityarrow_drop_down
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Sustainability
    Article . 2016 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Sustainability
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Sustainability
    Article . 2016
    Data sources: DOAJ
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Sustainabilityarrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Sustainability
      Article . 2016 . Peer-reviewed
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Sustainability
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Sustainability
      Article . 2016
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
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  • image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Authors: Gumbert, Tobias;

    This article makes the central argument that basic democratic values such as justice, autonomy and participation run the risk of being neglected when designing ‘nudges’ (i.e., indirect suggestions to influence individual behaviour) for sustainable behaviour change in the context of food governance, potentially complicating a democratisation of the food system. ‘Nudges’ uphold freedom of choice while simultaneously advocating a non-coercive soft force of paternalism to help people realise their preferences, maximise societal well-being and meet macro-sustainability goals. While the promises of the ‘nudge’ approach are widely echoed, nudging is also being contested because of its possible anti-democratic effects, such as individualisation, depoliticization and the emphasis of the status of citizens as ‘consumer-citizens.’ From a food democracy perspective, these dangers may undermine efforts to organise collective political action and impede alternative visions of a future food system. Empirically, the article examines specifically how behavioural-economic approaches imagine transitions to a more sustainable food system. By using the “COOP Supermarket of the Future” as a case study, the following analysis will illustrate how private actors are increasingly involved in steering consumer choice towards socially desirable actions. The analysis suggests that the design of choice environments may under specific circumstances increase the susceptibility of individuals to the influence of corporate preferences and simultaneously decrease the prospects for democratic legitimation and decision-making. The article therefore critically assesses whether reforming the food system by altering consumers’ choice-sets and the attribution of personal responsibility, may in fact point towards implicit anti-democratic tenets underlying the ‘will to nudge’ citizens.

    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Politics and Governa...arrow_drop_down
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    Politics and Governance
    Article . 2019 . Peer-reviewed
    License: CC BY
    Data sources: Crossref
    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Politics and Governance
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    image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
    Politics and Governance
    Article . 2019
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Politics and Governa...arrow_drop_down
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      Politics and Governance
      Article . 2019 . Peer-reviewed
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      Article . 2019
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    Authors: Martha Campbell; orcid bw John B. Casterline;
    John B. Casterline
    ORCID
    Derived by OpenAIRE algorithms or harvested from 3rd party repositories

    John B. Casterline in OpenAIRE
    orcid Federico Castillo;
    Federico Castillo
    ORCID
    Harvested from ORCID Public Data File

    Federico Castillo in OpenAIRE
    Alisha Graves; +8 Authors

    Pour de nombreux pays en développement, les investissements dans la santé ont été un grand succès. The Lancet Commission « Global health 2035 : a world converging within a generation »1Jamison DT Summers LH Alleyne G et al.Global health 2035 : a world converging within a generation.Lancet. 2013 ; 382: 1898-1955Sommaire Texte intégral PDF PubMed Scopus (804) Google Scholar et la lettre annuelle 2014 de Gates2 Lettre annuelle 2014 de Gates de Bill et Melinda Gates. 3 mythes qui bloquent le progrès pour les pauvres.http ://annualletter.gatesfoundation.org/#section = homeGoogle Scholar envisage la possibilité d'une « grande convergence » par laquelle plus de pays auront un taux de mortalité infantile aussi bas que 15 pour 1 000 naissances vivantes dans 20 ans. Nous souhaitons attirer l'attention sur le cas particulier des pays les moins avancés, qui, selon les données actuelles, sont susceptibles d'être exclus d'une telle convergence. Pour commencer une discussion, nous nous concentrerons sur le Sahel (la zone semi-aride d'un million de milles carrés de l'Afrique s'étendant de l'Atlantique à la mer Rouge) où le choc de la croissance démographique particulièrement rapide et certains des effets les plus sévères du changement climatique sont susceptibles d'avoir les effets globaux les plus importants sur la santé. Les projections démographiques présentées dans la figure sont la variante moyenne de la Division de la population des Nations Unies. Ces projections pourraient être dépassées à moins qu'une plus grande importance ne soit accordée à la planification familiale. Même en supposant une diminution rapide de la taille des familles par rapport à la moyenne actuelle de 7,6, la population du Niger passera à elle seule de 16 millions aujourd'hui à 58 millions d'ici 2050. Cette augmentation est révélatrice de la formidable dynamique démographique au Sahel. Plus de 40 % de la population a moins de 15 ans. En l'absence de réductions substantielles des émissions de gaz à effet de serre par les pays développés, le Sahel (parce qu'il est déjà si sec) est susceptible de subir certains des pires effets du changement climatique, avec des augmentations de température allant jusqu'à 5-8 ° C d'ici 2100 (figure) .3IPCCSummary for policymakers.in : Stocker TF D Qin G-K Plattner M Climate change 2013 : the physical science basis. Cambridge University Press, Cambridge, Royaume-Uni2013Google Scholar Les événements météorologiques extrêmes deviendront plus fréquents et l'effet du réchauffement climatique se fera probablement sentir dans de nombreux secteurs, de la santé à l'agriculture. Les maladies à transmission vectorielle sont susceptibles d'augmenter. Le changement climatique pourrait réduire les rendements des cultures en Afrique subsaharienne de 22 % pour le maïs et de 8 % pour le manioc.4Schlenker W Lobell DB Impacts négatifs robustes du changement climatique sur l'agriculture africaine.Environ Res Lett. 2010 ; 5: 014010Crossref Scopus (814) Google Scholar En 2012, l'Université de Californie, Berkeley, CA, États-Unis, et l'Institut africain pour la politique de développement, Nairobi, Kenya, ont organisé une réunion internationale multidisciplinaire sur le Sahel.5Potts M Zulu E Castillo F Henderson C Crisis in the Sahel : possible solutions and the consequences of inaction. University of California, Bixby Center for Population Health and Sustainability, Berkeley2013Google Scholar Bien que reconnaissant la grave menace que représentent la croissance démographique rapide et la désertification dans cette région, la réunion a également identifié des solutions fondées sur des preuves, y compris trois interventions clés. Tout d'abord, les agriculteurs de subsistance et les éleveurs ont besoin d'aide pour s'adapter au changement climatique. L'adaptation nécessitera le développement de cultures résistantes à la sécheresse, des méthodes pour faire face à l'évolution des infestations de ravageurs, un meilleur stockage des cultures et une capture et un stockage plus efficaces de l'eau. Une approche multidisciplinaire et une vision à long terme sont indispensables - actuellement, de nombreuses interventions ne sont pas adoptées tant que des pénuries d'eau visibles ne se produisent pas. Deuxièmement, une plus grande priorité doit être accordée à la planification familiale. Il faut mobiliser la volonté politique pour inciter les donateurs internationaux à investir dans la planification familiale, et les gouvernements sahéliens doivent être plus proactifs. Il existe un besoin non satisfait bien documenté de planification familiale allant de 16 % à 35 % des femmes mariées, calculé avec le STATcompiler des enquêtes démographiques et de santé, mais dans ces sociétés à fécondité élevée, une création accrue de la demande est également cruciale. Là où la planification familiale a été apportée aux femmes dans leurs propres communautés, comme au Bangladesh, l'utilisation de contraceptifs a augmenté rapidement, même chez les femmes pauvres.6Campbell M Prata N Potts M L'impact de la liberté sur le déclin de la fécondité.J Fam Plan Reprod Health Care. 2013 ; 39: 44-50Crossref PubMed Scopus (25) Google Scholar, 7Cleland J Phillips J Amin S Kamal GM The determinants of reproductive change in Bangladesh : success in a challenging environment. The World Bank, Washington, DC1994Google Scholar Task shifting, for example training community volunteers to distribute injectable contraceptives,8Prata N Gessessew A Cartwright A Fraser A Provision of injectable contraceptives in Ethiopia through community-based reproductive health agents.Bull World Health Organ. 2011 ; 89: 556-564Crossref PubMed Scopus (46) Google Scholar et l'accent accru sur la stérilisation chirurgicale, les dispositifs intra-utérins et les implants, ainsi que l'accès à des soins complets en matière d'avortement, sont essentiels. Troisièmement, les donateurs et les gouvernements doivent investir massivement dans l'autonomisation des femmes. Le statut des femmes au Sahel est faible. Le mariage des enfants reste courant, ce qui augmente la probabilité d'une grossesse précoce pour une femme et diminue ses chances de mener une vie autonome. La grossesse chez les adolescentes immatures est une cause majeure de mortalité et de morbidité maternelles, telles que la fistule obstétricale.9Nour NM Conséquences sanitaires du mariage des enfants en Afrique.Emerg Infect Dis. 2006 ; 11: 1644-1649Crossref Scopus (245) Google Scholar La promotion de l'éducation est une stratégie clé pour réduire le mariage des enfants et reporter la première naissance. Les programmes de renforcement des capacités par l'éducation et la microfinance parmi les communautés pastorales ont transformé les femmes illettrées pauvres en leaders qui ont aidé à adapter leurs communautés à la sécheresse.10Coppock DI Desta S Texera S Gerbru G Le renforcement des capacités aide les femmes pastorales à transformer les communautés appauvries en Éthiopie.Science. 2011 ; 334: 1394-1397Crossref PubMed Scopus (40) Google Scholar Dans une société Haoussa polygame du nord-ouest du Nigeria, avec un âge médian de mariage de 14·6 ans et où les parents considéraient généralement les démarches ménagères comme un signe de préparation au mariage, de nombreux parents sont maintenant prêts à retarder le mariage de leurs filles si on leur propose de l'aide pour les frais de scolarité et les livres. Ces trois interventions clés sont considérées comme se renforçant mutuellement. Bien qu'elles impliquent des considérations à long terme, certaines, telles que l'amélioration des pratiques agricoles, ont des retombées immédiates. Les programmes doivent être intégrés de manière à exploiter les effets multiplicateurs intrinsèques. Par exemple, l'éducation des filles facilite l'adoption de la planification familiale et améliore la génération de revenus dans la famille. Une recherche et une évaluation rigoureuses seront essentielles pour constituer la base de données probantes pour ces investissements urgents. Des lacunes importantes dans les données démographiques, agricoles et sanitaires doivent être comblées. Les politiques doivent être conçues de manière à apporter des avantages mesurables et significatifs aux populations les plus vulnérables. Les interventions doivent être développées dans un cadre de droits de l'homme, en veillant à ce que les avantages ne dérivent pas uniquement vers ceux qui ont le plus de capital social et politique. Les pays les moins avancés, tels que ceux du Sahel, reçoivent 0,9 % du revenu national brut des pays industrialisés au titre de l'aide publique au développement, soit beaucoup moins que ce que les donateurs se sont engagés à faire.11 Fonds des Nations Unies pour la populationInstitut démographique interdisciplinaire des Pays-BasBase de données sur les flux de ressources. Population assistance per capital, Afrique subsaharienne, 2009.http ://www.resourceflows.org/Google Scholar, 12UN Development Programme Bureau for Development PolicyTowards human resilience : sustaining MDG progress in an age of economic uncertainty. Programme des Nations Unies pour le développement, New York, NY, USA2011Google Scholar Pour faire face aux formidables défis auxquels la région est confrontée, l'action doit être immédiate et à grande échelle. Sur la base du modèle de la Commission Lancet, nous suggérons qu'un groupe d'experts du Sahel et d'institutions de recherche ailleurs dans le monde soit convoqué pour explorer et documenter les initiatives intersectorielles et évolutives nécessaires pour éviter que le Sahel (et d'autres régions les moins développées) ne soit totalement exclu de la promesse d'amélioration de la santé et du bien-être prévue dans la Commission Lancet.1Jamison DT Summers LH Alleyne G et al.Global health 2035 : a world converging within a generation.Lancet. 2013 ; 382: 1898-1955Résumé Texte intégral Texte intégral PDF PubMed Scopus (804) Google Scholar Nous déclarons que nous n'avons pas d'intérêts concurrents. Para muchos países en desarrollo, las inversiones en salud han demostrado ser un gran éxito. La Comisión Lancet "Salud global 2035: un mundo convergente dentro de una generación" 1Jamison DT Summers LH Alleyne G et al. Salud global 2035: un mundo convergente dentro de una generación. Lancet. 2013; 382: 1898-1955Resumen Texto completo PDF PubMed Scopus (804) Google Scholar y la carta anual de Gates de 20142Bill & Melinda Gates Foundation2014 Carta anual de Gates. 3 mitos que bloquean el progreso de los pobres.http://annualletter.gatesfoundation.org/#section = homeGoogle Scholar prevé la posibilidad de una "gran convergencia" por la cual más países tendrán una tasa de mortalidad infantil tan baja como 15 por cada 1000 nacidos vivos en 20 años. Deseamos llamar la atención sobre el caso especial de los países menos adelantados, que según las pruebas actuales es probable que queden excluidos de tal convergencia. Para comenzar una discusión, nos centraremos en el Sahel (la zona semiárida de 1 millón de millas cuadradas de África que se extiende desde el Atlántico hasta el Mar Rojo), donde es probable que el choque del crecimiento demográfico excepcionalmente rápido y algunos de los efectos más duros del cambio climático tengan los mayores efectos generales sobre la salud. Las proyecciones de población que se muestran en la figura son la variante media de la División de Población de la ONU. Estas proyecciones podrían superarse a menos que se dé mucho más énfasis a la planificación familiar. Incluso suponiendo una rápida disminución en el tamaño de la familia desde el promedio actual de 7·6, la población de Níger crecerá de los 16 millones actuales a 58 millones para 2050. Este aumento es indicativo del formidable impulso demográfico en el Sahel. Más del 40% de la población es menor de 15 años. En ausencia de recortes sustanciales en las emisiones de gases de efecto invernadero por parte de las naciones desarrolladas, es probable que el Sahel (porque ya está muy seco) sufra algunos de los peores efectos del cambio climático, con aumentos de temperatura de hasta 5-8 ° C para 2100 (figura) .3IPCCResumen para los responsables de la formulación de políticas.in: Stocker TF D Qin G-K Plattner M Cambio climático 2013: la base de la ciencia física. Cambridge University Press, Cambridge, Reino Unido2013Google Scholar Los fenómenos meteorológicos extremos serán cada vez más comunes, y es probable que el efecto del calentamiento global se sienta en muchos sectores, desde la salud hasta la agricultura. Es probable que aumenten las enfermedades transmitidas por vectores. El cambio climático podría reducir los rendimientos de los cultivos en África subsahariana en un 22% para el maíz y en un 8% para la yuca.4Schlenker W Lobell DB Fuertes impactos negativos del cambio climático en la agricultura africana.Environ Res Lett. 2010; 5: 014010Crossref Scopus (814) Google Scholar En 2012, la Universidad de California, Berkeley, CA, EE. UU., y el Instituto Africano de Política de Desarrollo, Nairobi, Kenia, organizaron una reunión internacional multidisciplinaria sobre el Sahel.5Potts M Zulu E Castillo F Henderson C Crisis en el Sahel: posibles soluciones y las consecuencias de la inacción. Universidad de California, Bixby Center for Population Health and Sustainability, Berkeley2013Google Scholar Aunque reconocieron la grave amenaza que el rápido crecimiento de la población y la desertificación presentan en esta región, la reunión también identificó soluciones basadas en la evidencia, incluidas tres intervenciones clave. En primer lugar, los agricultores y pastores de subsistencia necesitan ayuda para adaptarse al cambio climático. La adaptación requerirá el desarrollo de cultivos resistentes a la sequía, métodos para abordar los patrones cambiantes de infestaciones de plagas, un mejor almacenamiento de los cultivos y una captura y almacenamiento de agua más eficientes. Un enfoque multidisciplinario y una visión a largo plazo son muy necesarios: actualmente, muchas intervenciones no se adoptan hasta que se produce una escasez visible de agua. En segundo lugar, se debe dar mayor prioridad a la planificación familiar. Se debe reunir la voluntad política para abogar por que los donantes internacionales inviertan en planificación familiar, y los gobiernos del Sahel deben ser más proactivos. Existe una necesidad insatisfecha bien documentada de planificación familiar que oscila entre el 16% y el 35% de las mujeres casadas, calculada con el compilador STAT de encuestas demográficas y de salud, pero en estas sociedades de alta fertilidad también es crucial una mayor creación de demanda. Donde la planificación familiar se ha llevado a las mujeres en sus propias comunidades, como en Bangladesh, el uso de anticonceptivos ha aumentado rápidamente, incluso entre las mujeres empobrecidas.6Campbell M Prata N Potts M El impacto de la libertad en la disminución de la fertilidad.J Fam Plan Reprod Health Care. 2013; 39: 44-50Crossref PubMed Scopus (25) Google Scholar, 7Cleland J Phillips J Amin S Kamal GM Los determinantes del cambio reproductivo en Bangladesh: éxito en un entorno desafiante. El Banco Mundial, Washington, DC1994Google Scholar Task shifting, por ejemplo, capacitar a voluntarios de la comunidad para distribuir anticonceptivos inyectables ,8PrataN Gessessew A Cartwright A Fraser A Provisión de anticonceptivos inyectables en Etiopía a través de agentes de salud reproductiva basados en la comunidad.Bull World Health Organ. 2011; 89: 556-564Crossref PubMed Scopus (46) Google Scholar y un mayor énfasis en la esterilización quirúrgica, los dispositivos intrauterinos y los implantes, junto con el acceso a la atención integral del aborto, son esenciales. En tercer lugar, los donantes y los gobiernos deben invertir fuertemente en el empoderamiento de las mujeres. La situación de las mujeres en el Sahel es baja. El matrimonio infantil sigue siendo común, lo que aumenta la probabilidad de que una mujer tenga un embarazo temprano y disminuye sus posibilidades de llevar una vida autónoma. El embarazo en adolescentes inmaduras es una causa importante de mortalidad y morbilidad materna, como la fístula obstétrica.9Nuestro NM Consecuencias para la salud del matrimonio infantil en África.Emerg Infect Dis. 2006; 11: 1644-1649Crossref Scopus (245) Google Scholar La promoción de la educación es una estrategia clave para reducir el matrimonio infantil y posponer el primer nacimiento. Los programas para desarrollar la capacidad mediante la educación y las microfinanzas entre las comunidades de pastores han convertido a las mujeres analfabetas pobres en líderes que ayudaron a adaptar sus comunidades a la sequía.10Coppock DI desta S texera S Gerbru G El desarrollo de capacidades ayuda a las mujeres de pastores a transformar las comunidades empobrecidas en Etiopía. Ciencia. 2011; 334: 1394-1397Crossref PubMed Scopus (40) Google Scholar En una sociedad hausa polígama en el noroeste de Nigeria, con una edad media de matrimonio de 14·6 años y donde los padres comúnmente veían la menarquia como un signo de preparación para el matrimonio, muchos padres ahora están dispuestos a retrasar los matrimonios de sus hijas si se les ofrece ayuda con las tarifas escolares y los libros. Estas tres intervenciones clave se consideran de apoyo mutuo. Aunque implican consideraciones a largo plazo, algunas, como la mejora de las prácticas agrícolas, tienen beneficios inmediatos. Los programas deben integrarse para aprovechar los efectos multiplicadores intrínsecos. Por ejemplo, educar a las niñas facilita la adopción de la planificación familiar y mejora la generación de ingresos en la familia. La investigación y la evaluación rigurosas serán esenciales para construir la base de evidencia para inversiones tan urgentemente necesarias. Es necesario llenar las lagunas sustanciales en los datos demográficos, agrícolas y de salud. Las políticas deben diseñarse para generar beneficios medibles y significativos para las poblaciones más vulnerables. Las intervenciones deben desarrollarse en un marco de derechos humanos, asegurando que los beneficios no se desvíen solo hacia aquellos con mayor capital social y político. Los países menos desarrollados, como los del Sahel, reciben el 0,9% del ingreso nacional bruto de los países industrializados en asistencia oficial para el desarrollo, mucho menos de lo que los donantes han comprometido.11Fondo de Población de las Naciones UnidasInstituto Demográfico Interdisciplinario de los Países BajosBase de datos de flujos de recursos. Population assistance per capital, África subsahariana, 2009.http://www.resourceflows.org/Google Scholar, 12UN Development Programme Bureau for Development PolicyTowards human resilience: sustaining MDG progress in a age of economic uncertainty. Programa de las Naciones Unidas para el Desarrollo, Nueva York, NY, EE. UU. 2011Google Scholar Para enfrentar los formidables desafíos que enfrenta la región, la acción debe ser inmediata y a gran escala. Sobre la base del modelo de la Comisión Lancet, sugerimos que se convoque a un grupo de expertos del Sahel e instituciones de investigación de otras partes del mundo para explorar y documentar las iniciativas intersectoriales y escalables necesarias para evitar que el Sahel (y otras regiones menos desarrolladas) queden totalmente excluidas de la promesa de mejorar la salud y el bienestar prevista en la Comisión Lancet.1Jamison DT Summers LH Alleyne G et al.Global health 2035: a world converging within a generation.Lancet. 2013; 382: 1898-1955 Resumen Texto completo Texto completo PDF PubMed Scopus (804) Google Scholar Declaramos que no tenemos intereses en competencia. For many developing countries, investments in health have proved a great success. The Lancet Commission "Global health 2035: a world converging within a generation"1Jamison DT Summers LH Alleyne G et al.Global health 2035: a world converging within a generation.Lancet. 2013; 382: 1898-1955Summary Full Text Full Text PDF PubMed Scopus (804) Google Scholar and the 2014 Gates annual letter2Bill & Melinda Gates Foundation2014 Gates annual letter. 3 myths that block progress for the poor.http://annualletter.gatesfoundation.org/#section=homeGoogle Scholar envision the possibility of a "grand convergence" by which more countries will have a child mortality rate as low as 15 per 1000 livebirths in 20 years time. We wish to draw attention to the special case of the least developed countries, which on present evidence are likely to be excluded from such a convergence. To start a discussion we will focus on the Sahel (the 1 million square-mile semi-arid zone of Africa stretching from the Atlantic to the Red Sea) where the clash of uniquely rapid population growth and some of the harshest effects of climate change are likely to have the greatest overall effects on health. The population projections shown in the figure are the UN Population Division's medium variant. These projections could be exceeded unless much greater emphasis is given to family planning. Even assuming rapid decreases in family size from the current average of 7·6, the population of Niger alone will grow from 16 million today to 58 million by 2050. This increase is indicative of the formidable population momentum in the Sahel. More than 40% of the population is younger than 15 years. In the absence of substantial cuts in greenhouse gas emissions by developed nations, the Sahel (because it is so dry already) is likely to suffer some of the worst effects of climate change, with temperature increases as high as 5–8°C by 2100 (figure).3IPCCSummary for policymakers.in: Stocker TF D Qin G-K Plattner M Climate change 2013: the physical science basis. Cambridge University Press, Cambridge, UK2013Google Scholar Extreme weather events will become more common, and the effect of global warming is likely to be felt over many sectors from health to agriculture. Vector-borne diseases are likely to increase. Climate change could reduce crop yields in sub-Saharan Africa by 22% for maize, and 8% for cassava.4Schlenker W Lobell DB Robust negative impacts of climate change on African agriculture.Environ Res Lett. 2010; 5: 014010Crossref Scopus (814) Google Scholar In 2012, the University of California, Berkeley, CA, USA, and the African Institute for Development Policy, Nairobi, Kenya, hosted a multidisciplinary international meeting on the Sahel.5Potts M Zulu E Castillo F Henderson C Crisis in the Sahel: possible solutions and the consequences of inaction. University of California, Bixby Center for Population Health and Sustainability, Berkeley2013Google Scholar Although recognising the serious threat that rapid population growth and desertification present in this region, the meeting also identified evidence-based solutions, including three key interventions. First, subsistence farmers and pastoralists need help to adapt to climate change. Adaptation will require the development of drought-resistant crops, methods to address changing patterns of pest infestations, improved crop storage, and more efficient water capture and storage. A multidisciplinary approach and a long-term vision are much needed—currently many interventions are not adopted until visible water shortages occur. Second, greater priority must be given to family planning. Political will must be garnered to advocate for international donors to invest in family planning, and Sahelian governments need to be more proactive. There is a well documented unmet need for family planning ranging from 16% to 35% of married women, calculated with the Demographic and Health Surveys STATcompiler, but in such high-fertility societies increased demand creation is also crucial. Where family planning has been brought to women in their own communities, as in Bangladesh, contraceptive use has increased rapidly, even among impoverished women.6Campbell M Prata N Potts M The impact of freedom on fertility decline.J Fam Plan Reprod Health Care. 2013; 39: 44-50Crossref PubMed Scopus (25) Google Scholar, 7Cleland J Phillips J Amin S Kamal GM The determinants of reproductive change in Bangladesh: success in a challenging environment. The World Bank, Washington, DC1994Google Scholar Task shifting, for example training community volunteers to distribute injectable contraceptives,8Prata N Gessessew A Cartwright A Fraser A Provision of injectable contraceptives in Ethiopia through community-based reproductive health agents.Bull World Health Organ. 2011; 89: 556-564Crossref PubMed Scopus (46) Google Scholar and increased emphasis on surgical sterilisation, intrauterine devices, and implants, together with access to comprehensive abortion care, are essential. Third, donors and governments need to invest heavily in women's empowerment. The status of women in the Sahel is low. Child marriage remains common, increasing a woman's likelihood of early pregnancy, and decreasing her chances of leading an autonomous life. Pregnancy in immature teenage girls is a major cause of maternal mortality and morbidity, such as obstetric fistula.9Nour NM Health consequences of child marriage in Africa.Emerg Infect Dis. 2006; 11: 1644-1649Crossref Scopus (245) Google Scholar Promotion of education is a key strategy to reduce child marriage and postpone the first birth. Programmes to build capacity by education and microfinance among pastoral communities have turned poor illiterate women into leaders who helped adapt their communities to drought.10Coppock DI Desta S Texera S Gerbru G Capacity building helps pastoral women transform impoverished communities in Ethiopia.Science. 2011; 334: 1394-1397Crossref PubMed Scopus (40) Google Scholar In a polygamous Hausa society in northwest Nigeria, with a median age of marriage of 14·6 years and where parents commonly viewed menarche as a sign of readiness for marriage, many parents are now willing to delay their daughters' marriages if offered help with school fees and books. These three key interventions are regarded as mutually supportive. Although they involve long-term considerations, some, such as improved agricultural practices, have immediate payoffs. Programmes need to be integrated so as to exploit intrinsic multiplier effects. For example, educating girls facilitates the adoption of family planning and enhances income generation in the family. Rigorous research and assessment will be essential to build the evidence base for such urgently needed investments. Substantial gaps in demographic, agricultural, and health data need to be filled. Policies need to be designed to result in measurable, meaningful benefit to the most vulnerable populations. Interventions must be developed in a human rights framework, ensuring that the benefits do not drift only toward those with the most social and political capital. Least developed countries, such as those in the Sahel, receive 0·09% of gross national income of industrialised countries in official development assistance—far less than what donors have committed.11UN Population FundNetherlands Interdisciplinary Demographic InstituteResource Flows database. Population assistance per capital, sub-Saharan Africa, 2009.http://www.resourceflows.org/Google Scholar, 12UN Development Programme Bureau for Development PolicyTowards human resilience: sustaining MDG progress in an age of economic uncertainty. UN Development Programme, New York, NY, USA2011Google Scholar To confront the formidable challenges facing the region, action must be immediate and large scale. On the basis of the model of the Lancet Commission, we suggest that a group of experts from the Sahel and research institutions elsewhere in the world should be convened to explore and document the cross-sectoral, scalable initiatives needed to avoid the Sahel (and other least developed regions) being totally excluded from the promise of improved health and welfare foreseen in the Lancet Commission.1Jamison DT Summers LH Alleyne G et al.Global health 2035: a world converging within a generation.Lancet. 2013; 382: 1898-1955Summary Full Text Full Text PDF PubMed Scopus (804) Google Scholar We declare that we have no competing interests. بالنسبة للعديد من البلدان النامية، أثبتت الاستثمارات في الصحة نجاحًا كبيرًا. لجنة لانسيت "الصحة العالمية 2035: عالم يتقارب في غضون جيل" 1Jamison DT Summers LH Alleyne G et al. الصحة العالمية 2035: عالم يتقارب في غضون جيل. 2013 ؛ 382: 1898-1955 ملخص النص الكامل PDF PubMed Scopus (804) الباحث العلمي من Google والرسالة السنوية 2014 Gates2Bill & Melinda Gates Foundation2014 Gates annual letter. 3 myths that block progress for the poor.http:// annualletter.gatesfoundation.org/#section=homeGoogle Scholar تصور إمكانية "التقارب الكبير" الذي من خلاله سيكون لدى المزيد من البلدان معدل وفيات الأطفال منخفضًا يصل إلى 15 لكل 1000 مولود حي في غضون 20 عامًا. نود أن نسترعي الانتباه إلى الحالة الخاصة لأقل البلدان نمواً، والتي من المرجح أن يتم استبعادها من هذا التقارب بناءً على الأدلة الحالية. لبدء مناقشة، سنركز على منطقة الساحل (المنطقة شبه القاحلة التي تبلغ مساحتها مليون ميل مربع في إفريقيا وتمتد من المحيط الأطلسي إلى البحر الأحمر) حيث من المرجح أن يكون لصدام النمو السكاني السريع بشكل فريد وبعض من أقسى آثار تغير المناخ أكبر الآثار الشاملة على الصحة. التوقعات السكانية الموضحة في الشكل هي المتغير المتوسط لشعبة السكان بالأمم المتحدة. يمكن تجاوز هذه التوقعات ما لم يتم التركيز بشكل أكبر على تنظيم الأسرة. حتى بافتراض الانخفاض السريع في حجم الأسرة من المتوسط الحالي البالغ 7.6، فإن عدد سكان النيجر وحده سينمو من 16 مليونًا اليوم إلى 58 مليونًا بحلول عام 2050. وتشير هذه الزيادة إلى الزخم السكاني الهائل في منطقة الساحل. أكثر من 40 ٪ من السكان تقل أعمارهم عن 15 عامًا. في غياب تخفيضات كبيرة في انبعاثات غازات الدفيئة من قبل الدول المتقدمة، من المرجح أن تعاني منطقة الساحل (لأنها جافة بالفعل) من بعض أسوأ آثار تغير المناخ، مع ارتفاع درجات الحرارة إلى 5-8 درجات مئوية بحلول عام 2100 (الشكل) .3 IPCCSummary for policymakers.in: Stocker TF D Qin G - K Plattner M Climate Change 2013: the physical science basis. مطبعة جامعة كامبريدج، كامبريدج، المملكة المتحدة 2013 ستصبح أحداث الطقس المتطرفة لباحث جوجل أكثر شيوعًا، ومن المرجح أن يكون تأثير الاحترار العالمي ملموسًا في العديد من القطاعات من الصحة إلى الزراعة. من المرجح أن تزداد الأمراض المنقولة بالنواقل. يمكن لتغير المناخ أن يقلل من غلة المحاصيل في أفريقيا جنوب الصحراء الكبرى بنسبة 22 ٪ للذرة، و 8 ٪ للكسافا .4 Schlenker W Lobell DB تأثيرات سلبية قوية لتغير المناخ على الزراعة الأفريقية. Environ Res Lett. 2010; 5: 014010Crossref Scopus (814) Google Scholar في عام 2012، استضافت جامعة كاليفورنيا، بيركلي، كاليفورنيا، الولايات المتحدة الأمريكية، والمعهد الأفريقي لسياسة التنمية، نيروبي، كينيا، اجتماعًا دوليًا متعدد التخصصات حول أزمة الساحل 5 بوتس إم زولو إي كاستيلو إف هندرسون سي في الساحل: الحلول الممكنة وعواقب التقاعس عن العمل. جامعة كاليفورنيا، مركز بيكسبي لصحة السكان والاستدامة، بيركلي 2013 الباحث العلمي من Google على الرغم من إدراك التهديد الخطير الذي يمثله النمو السكاني السريع والتصحر في هذه المنطقة، فقد حدد الاجتماع أيضًا حلولًا قائمة على الأدلة، بما في ذلك ثلاثة تدخلات رئيسية. أولاً، يحتاج مزارعو الكفاف والرعاة إلى المساعدة للتكيف مع تغير المناخ. سيتطلب التكيف تطوير محاصيل مقاومة للجفاف، وطرقًا لمعالجة الأنماط المتغيرة لتفشي الآفات، وتحسين تخزين المحاصيل، وجمع المياه وتخزينها بشكل أكثر كفاءة. هناك حاجة ماسة إلى نهج متعدد التخصصات ورؤية طويلة الأجل - في الوقت الحالي لا يتم اعتماد العديد من التدخلات حتى يحدث نقص واضح في المياه. ثانياً، يجب إعطاء أولوية أكبر لتنظيم الأسرة. يجب حشد الإرادة السياسية لمناصرة المانحين الدوليين للاستثمار في تنظيم الأسرة، ويجب أن تكون حكومات منطقة الساحل أكثر استباقية. هناك حاجة موثقة جيدًا غير ملباة لتنظيم الأسرة تتراوح بين 16 ٪ إلى 35 ٪ من النساء المتزوجات، محسوبة باستخدام برنامج تجميع الاستقصاءات الديموغرافية والصحية، ولكن في مثل هذه المجتمعات ذات الخصوبة العالية، يعد زيادة خلق الطلب أمرًا بالغ الأهمية أيضًا. حيث تم جلب تنظيم الأسرة للنساء في مجتمعاتهن المحلية، كما هو الحال في بنغلاديش، زاد استخدام وسائل منع الحمل بسرعة، حتى بين النساء الفقيرات .6 Campbell M Prata N Potts M تأثير الحرية على انخفاض الخصوبة .J Fam Plan Reprod Health Care. 2013 ؛ 39: 44-50 Crossref PubMed Scopus (25) الباحث العلمي من Google، 7Cleland J Phillips J Amin S Kamal GM محددات التغيير الإنجابي في بنغلاديش: النجاح في بيئة صعبة. البنك الدولي، واشنطن، DC1994 تغيير مهام الباحث العلمي من Google، على سبيل المثال تدريب المتطوعين المجتمعيين على توزيع وسائل منع الحمل القابلة للحقن، 8 براتا إن جيسو إيه كارترايت إيه فريزر توفير وسائل منع الحمل القابلة للحقن في إثيوبيا من خلال وكلاء الصحة الإنجابية المجتمعية. منظمة الصحة العالمية. 2011 ؛ 89: 556-564 Crossref PubMed Scopus (46) Google Scholar وزيادة التركيز على التعقيم الجراحي والأجهزة داخل الرحم والغرسات، إلى جانب الوصول إلى الرعاية الشاملة للإجهاض، أمر ضروري. ثالثًا، تحتاج الجهات المانحة والحكومات إلى الاستثمار بكثافة في تمكين المرأة. وضع المرأة في منطقة الساحل منخفض. لا يزال زواج الأطفال شائعًا، مما يزيد من احتمال الحمل المبكر للمرأة، ويقلل من فرصها في العيش حياة مستقلة. يعد الحمل لدى الفتيات المراهقات غير الناضجات سببًا رئيسيًا لوفيات الأمهات واعتلالهن، مثل ناسور الولادة .9 ولا عواقب صحية لزواج الأطفال في أفريقيا .العدوى الطارئة. 2006 ؛ 11: 1644-1649 Crossref Scopus (245) يعد ترويج الباحث العلمي من Google للتعليم استراتيجية رئيسية للحد من زواج الأطفال وتأجيل الولادة الأولى. أدت برامج بناء القدرات من خلال التعليم والتمويل الأصغر بين المجتمعات الرعوية إلى تحويل النساء الأميات الفقيرات إلى قادة ساعدوا في تكييف مجتمعاتهن مع الجفاف .10 يساعد بناء القدرات النساء الرعويات على تحويل المجتمعات الفقيرة في إثيوبيا .العلوم. 2011 ؛ 334: 1394-1397 كروسريف بوبد سكوبس (40) الباحث العلمي من غوغل في مجتمع هوسا متعدد الزوجات في شمال غرب نيجيريا، بمتوسط عمر زواج يبلغ 14·6 سنوات وحيث ينظر الآباء عادة إلى الحيض على أنه علامة على الاستعداد للزواج، فإن العديد من الآباء على استعداد الآن لتأخير زواج بناتهم إذا عرضت عليهم المساعدة في الرسوم المدرسية والكتب. تعتبر هذه التدخلات الرئيسية الثلاثة داعمة لبعضها البعض. على الرغم من أنها تنطوي على اعتبارات طويلة الأجل، إلا أن بعضها، مثل الممارسات الزراعية المحسنة، يحصل على مكافآت فورية. يجب دمج البرامج من أجل استغلال التأثيرات المضاعفة الجوهرية. على سبيل المثال، يسهل تعليم الفتيات اعتماد تنظيم الأسرة ويعزز توليد الدخل في الأسرة. سيكون البحث والتقييم الدقيقان ضروريين لبناء قاعدة الأدلة لمثل هذه الاستثمارات المطلوبة بشكل عاجل. يجب سد الثغرات الكبيرة في البيانات الديموغرافية والزراعية والصحية. يجب تصميم السياسات بحيث تؤدي إلى فائدة قابلة للقياس وذات مغزى للفئات السكانية الأكثر ضعفاً. يجب تطوير التدخلات في إطار حقوق الإنسان، مع ضمان عدم انحراف الفوائد فقط نحو أولئك الذين لديهم أكبر قدر من رأس المال الاجتماعي والسياسي. تتلقى أقل البلدان نمواً، مثل تلك الموجودة في منطقة الساحل، 0·09 ٪ من الدخل القومي الإجمالي للبلدان الصناعية في المساعدة الإنمائية الرسمية - أقل بكثير مما التزم به المانحون .11 صندوق الأمم المتحدة للسكانالمعهد الديمغرافي الهولندي متعدد التخصصاتقاعدة بيانات تدفقات الموارد. المساعدة السكانية لكل رأس مال، أفريقيا جنوب الصحراء الكبرى، 2009.http://www.resourceflows.org/Google Scholar، 12 مكتب برنامج الأمم المتحدة الإنمائي للسياسات الإنمائية نحو المرونة البشرية: الحفاظ على التقدم المحرز في الأهداف الإنمائية للألفية في عصر عدم اليقين الاقتصادي. برنامج الأمم المتحدة الإنمائي، نيويورك، نيويورك، الولايات المتحدة الأمريكية2011 الباحث العلمي من Google لمواجهة التحديات الهائلة التي تواجه المنطقة، يجب أن يكون العمل فوريًا وعلى نطاق واسع. على أساس نموذج لجنة لانسيت، نقترح عقد اجتماع لمجموعة من الخبراء من منطقة الساحل والمؤسسات البحثية في أماكن أخرى من العالم لاستكشاف وتوثيق المبادرات الشاملة لعدة قطاعات والقابلة للتطوير اللازمة لتجنب استبعاد منطقة الساحل (وغيرها من المناطق الأقل نمواً) تمامًا من الوعد بتحسين الصحة والرفاهية المتوقع في لجنة لانسيت. 1 جيمسون دي تي سمرز إل إتش ألين جي وآخرون. الصحة العالمية 2035: عالم يتقارب في غضون جيل. لانسيت. 2013 ؛ 382: 1898-1955 ملخص النص الكامل PDF PubMed Scopus (804) الباحث العلمي من Google نعلن أنه ليس لدينا مصالح متنافسة.

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    Authors: Yanan Peng; Xuedong Liu; Xiaorong Hang; Jing Hou; +1 Authors

    Aiming at the large carbon emissions of facility agricultural heating in severe cold regions in winter, a compound parabolic concentrator based soil heating system was presented. The system integrated with novel trough compound parabolic concentrator and was used for soil heating in facility agriculture. Following the structure of the compound parabolic concentrator, TracePro software was selected to trace the light in the compound parabolic concentrator. The variation trend of the light escape rate of the compound parabolic concentrator with the different incident angles was analyzed. Based on the calculation results, the performance of the solar collector system was investigated, and the impact of circulating air velocity on the photo-thermal performance of the solar collector system was explored. Research results indicate that when the circulating air velocity is 1.4 m/s and the average ambient temperature is about 28.9?, the temperature of the system outlet is up to 90.9?. The average instantaneous heat collection, maximum photo-thermal conversion efficiency, and unit area heat collection of the system are 740.6 W, 27.83%, and 0.8 MJ/m2, respectively. This research can effectively promote the efficient integration of the solar collector system in facility agriculture.

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    Thermal Science
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      Thermal Science
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    Authors: orcid Kaitlyn Spangler;
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    Roslynn Brain McCann; Rafter Sass Ferguson;

    The solutions-based design framework of permaculture exhibits transformative potential, working to holistically integrate natural and human systems toward a more just society. The term can be defined and applied in a breadth of ways, contributing to both strengths and weaknesses for its capacity toward change. To explore the tension of breadth as strength and weakness, we interviewed 25 prominent permaculture teachers and practitioners across the United States (US) regarding how they define permaculture as a concept and perceive the term’s utility. We find that permaculture casts a wide net that participants grapple with in their own work. They engaged in a negotiation process of how they associate or disassociate themselves with the term, recognizing that it can be both unifying and polarizing. Further, there was noted concern of permaculture’s failure to cite and acknowledge its rootedness in Indigenous knowledge, as well as distinguish itself from Indigenous alternatives. We contextualize these findings within the resounding call for a decolonization of modern ways of living and the science of sustainability, of which permaculture can be critically part of. We conclude with recommended best practices for how to continuously (re-)define permaculture in an embodied and dynamic way to work toward these goals.

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    Sustainability
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    Sustainability
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    DigitalCommons@USU
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      Sustainability
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    Authors: orcid Enzhu Hu;
    Enzhu Hu
    ORCID
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    Enzhu Hu in OpenAIRE
    orcid Karl D. Dearn;
    Karl D. Dearn
    ORCID
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    Karl D. Dearn in OpenAIRE
    Yufu Xu; Ruhong Song; +2 Authors

    Abstract A biomass oil/diesel blend was prepared using an emulsion method and combusted in a diesel engine. An injector was then removed and the morphology, composition, and structure of the carbonaceous deposits on the pintle-type nozzle were characterized using a combination of HRTEM, SEM/EDAX, Raman and XRD. Results showed that the carbon deposition of the emulsified fuel with high crystallinity was greater than that of diesel. The agglomerated particulate diameters of the deposited carbon from diesel and emulsified fuel were approximately 10–30 μm and 50 μm, respectively. The carbon deposition mechanism from the emulsified fuel was attributed to the high oxygen content of the groups leading to increased polymerization and subsequent condensation on the nozzle surfaces that was then carbonised.

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    Tribology International
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    Tribology International
    Article . 2015 . Peer-reviewed
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      Tribology International
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      Tribology International
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    Authors: Petr Míša; Lukáš Strnad;

    This study evaluate the effects of different types of agricultural systems and their managements on energy balance over 45-year period (1970–2015). Agricultural systems were (i) spring barley and (ii) winter wheat monocultures with different types of organic supply (straw incorporation, straw incorporation + green manuring, green manuring and control without organic supply) and (iii) Norfolk four-course system. Averaged across each half of study period, total energy inputs ranged between 10.2 GJ ha-1 year-1 for barley in Norfolk to 22.9 GJ ha-1 year-1 for wheat in monoculture with green manuring. The results indicate increase of indirect inputs in case of wheat and barley in Norfolk. The only system where the indirect input energy became lower was barley monoculture. Total energy outputs ranged between 198 GJ ha-1 year-1 for wheat in Norfolk to 88 GJ ha-1 year-1 for barley in monoculture. Norfolk system had higher output/input ratio than monocultures during whole study period. In almost all systems the effectiveness of energy use decreased during study period when comparing two halves. Yields of cereals throughout all systems were negatively dependent on energy input.

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    Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
    Article . 2016 . Peer-reviewed
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      Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
      Article . 2016 . Peer-reviewed
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    Authors: Jatmiko; K. Fifield; P. Hadi; orcid Jian-xin Zhao;
    Jian-xin Zhao
    ORCID
    Harvested from ORCID Public Data File

    Jian-xin Zhao in OpenAIRE
    +11 Authors

    Song Gupuh, a partially collapsed cave in the Gunung Sewu Limestones of East Java, Indonesia, contains over 16 m of deposits with a faunal sequence spanning some 70 ka. Major changes in the range of animals represented show the impact of climate change and humans. The Terminal Pleistocene and Early Holocene was a period of maximum biodiversity. Human use of Song Gupuh and other cave sites in the region also intensified significantly from ca. 12 ka, together with a new focus on exploitation of small-bodied species (macaque monkeys and molluscs), the first evidence for import of resources from the coast, and use of bone and shell tools. Human activity, especially after the onset of the Neolithic around 2.6 ka, subsequently contributed to a progressive loss of many species from the area, including tapir, elephant, Malayan bear, rhino and tiger, and this extinction process is continuing. We conclude by discussing the biogeographical significance of Song Gupuh in the context of other sites in Java (e.g. Punung, Wajak) and further afield (e.g. Liang Bua).

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    Journal of Archaeological Science
    Article . 2008 . Peer-reviewed
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      Journal of Archaeological Science
      Article . 2008 . Peer-reviewed
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    Authors: orcid Allaoui, Hamid;
    Allaoui, Hamid
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    Allaoui, Hamid in OpenAIRE
    orcid Guo, Yuhan;
    Guo, Yuhan
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    Guo, Yuhan in OpenAIRE
    Choudhary, Alok; orcid bw Bloemhof-Ruwaard, J.M.;
    Bloemhof-Ruwaard, J.M.
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    Bloemhof-Ruwaard, J.M. in OpenAIRE

    Sustainability of agro-food supply chains has recently become the subject of greater interest from consumers, firms, governmental organizations and academia as the environment continues to deteriorate. One of the most critical factors influencing the sustainability of an agro-food supply chain is its network design. A particularly challenging aspect in this context is the broad range of influencing indicators associated with the Triple Bottom Line (TBL) of sustainability that need to be considered. However, many of these indicators could not be fully integrated or measured by single-step optimization problems. This paper presents a critical literature review of operational research methods for the design of sustainable supply chains. A novel two-stage hybrid solution methodology is proposed. In the first stage, a partner selection is performed using a hybrid multi criteria decision making based on Analytic Hierarchy Process (AHP) method and the Ordered Weighted Averaging (OWA) aggregation method. The result obtained in the first stage is used in the second stage to develop a multi-objective mathematical model to optimize the design of the supply chain network. This approach allows the simultaneous consideration of all three dimensions of sustainability including carbon footprint, water footprint, number of jobs created and the total cost of the supply chain design. The proposed approach generates a Pareto frontier to aid users in making decisions. Numerical experiments are completed utilizing data from an agro-food company to demonstrate the efficiency and effectiveness of the proposed solution methodology. The analyzes of the numerical results provide important organizational, practical and policy insights on (1) the impact of financial and environmental sustainability on supply chain network design (2) the tradeoff analysis between environmental emission, water footprint, societal implications and associated cost for making informed decision on supply chain investment.

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    Computers & Operations Research
    Article
    License: CC BY NC ND
    Data sources: UnpayWall
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Research@WUR
    Article . 2018
    Data sources: Research@WUR
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Research@WUR
    Other literature type . 2017
    Data sources: Research@WUR
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
    Computers & Operations Research
    Article . 2018 . Peer-reviewed
    License: Elsevier TDM
    Data sources: Crossref
    image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
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    Article . 2018
    Data sources: Hal
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      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/ Computers & Operatio...arrow_drop_down
      image/svg+xml art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos Open Access logo, converted into svg, designed by PLoS. This version with transparent background. http://commons.wikimedia.org/wiki/File:Open_Access_logo_PLoS_white.svg art designer at PLoS, modified by Wikipedia users Nina, Beao, JakobVoss, and AnonMoos http://www.plos.org/
      Computers & Operations Research
      Article
      License: CC BY NC ND
      Data sources: UnpayWall
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Research@WUR
      Article . 2018
      Data sources: Research@WUR
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Research@WUR
      Other literature type . 2017
      Data sources: Research@WUR
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Computers & Operations Research
      Article . 2018 . Peer-reviewed
      License: Elsevier TDM
      Data sources: Crossref
      image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
      Hal
      Article . 2018
      Data sources: Hal
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