Evaluation du recul du trait de cote sur une portion du littoral atlantique marocain de Mohammedia--Assessment of coastal retreat on a portion of the Moroccan Atlantic coastline at Mohammedia

International audienceLe littoral de Mohammedia, sur la côte atlantique du Maroc, est caractérisé par une forte urbanisation. Il présente une morphologie très variée avec une alternance de côtes rocheuses et de côtes sableuses. L'étude de photographies aériennes ainsi que l'analyse des profils topographiques de plages levés au cours d'un cycle annuel ont permis d'évaluer le recul que connaît cette portion du littoral atlantique marocain, du fait des contraintes naturelles et anthropiques The Atlantic coastline of Morocco at Mohammedia is characterised by heavy urbanization. It shows very variable morphology with alternating rocky and sandy beaches. The study of aerial photographs and the analysis of topographic profiles of beaches surveyed during an annual cycle have allowed the assessment of the retreat happening in this portion of the Moroccan Atlantic coastline, as well as natural and anthropic constraint

Modern insulation materials for warming of walls

Biodiversity hotspots understandably attract considerable conservation attention. However, deserts are rarely viewed as conservation priority areas, due to their relatively low productivity, yet these systems are home to unique species, adapted to harsh and highly variable environments. While global attention has been focused on hotspots, the world's largest tropical desert, the Sahara, has suffered a catastrophic decline in megafauna. Of 14 large vertebrates that have historically occurred in the region, four are now extinct in the wild, including the iconic scimitar-horned oryx (Oryx dammah). The majority has disappeared from more than 90% of their Saharan range, including addax (Addax nasomaculatus), dama gazelle (Nanger dama) and Saharan cheetah (Acinonyx jubatus hecki) - all now on the brink of extinction. Greater conservation support and scientific attention for the region might have helped to avert these catastrophic declines. The Sahara serves as an example of a wider historical neglect of deserts and the human communities who depend on them. The scientific community can make an important contribution to conservation in deserts by establishing baseline information on biodiversity and developing new approaches to sustainable management of desert species and ecosystems. Such approaches must accommodate mobility of both people and wildlife so that they can use resources most efficiently in the face of low and unpredictable rainfall. This is needed to enable governments to deliver on their commitments to halt further degradation of deserts and to improve their status for both biodiversity conservation and human well-being. Only by so-doing will deserts be able to support resilient ecosystems and communities that are best able to adapt to climate change. © 2013 John Wiley & Sons Ltd

Disseny preliminar d'un dispositiu per a captació de microplàstics en mitjans marins

[ES] Este proyecto consiste en una pequeña solución a uno de los mayores problemas que está sufriendo el planeta en el siglo XXI: la contaminación extrema por plásticos en los océanos y mares y nuestras aguas. La solución planteada se centra en los microplásticos (pequeñas partículas de material plásticos que se encuentran flotando en el agua). El documento explica de forma detallada el diseño de un dispositivo pasivo que necesita estar adherido a una embarcación marina que permitirá que el prototipo se mueve por las aguas marinas filtrando todo lo posible.[EN] This project sets out a small solution to one of the biggest problems that the planet is suffering in the 21st century: the extreme pollution by plastics in the oceans and seas and our waters. The solution focuses on microplastics (small particles of plastic material floating in the water). The paper details the design of a passive device that needs to be attached to a marine vessel that will allow the prototype to move through the marine waters filtering as much as possible.[CA] Aquest projecte consisteix en una xicoteta solució a un dels majors problemes que està patint el planeta en el segle XXI: la contaminació extrema per plàstics en els oceans i mars i les nostres aigües. La solució plantejada se centra en els microplàstics (xicotetes partícules de material plàstics que es troben surant en l'aigua). El document explica de forma detallada el disseny d'un dispositiu passiu que necessita estar adherit a una embarcació marina que permetrà que el prototip es mou per les aigües marines filtrant tot el possible.El Haddane Leghrafi, O. (2022). Diseño preliminar de un dispositivo para captación de microplásticos en medios marinos. Universitat Politècnica de València. http://hdl.handle.net/10251/18713

Documentation Porteau 3 : Guide utilisateur

[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]TED [Axe_IRSTEA]TED-NETWATERAutresGuide d'utilisation du logiciel PORTEAU

Porteau version 3 : Logiciel de simulation de réseaux d’eau sous pression : Manuel d’installation

[Departement_IRSTEA]MA [TR1_IRSTEA]TED / NETWATERAutresManuel d'installation du logiciel de simulation de réseaux d'eau sous pression

Progiciel PORTEAU : Logiciels pour le Fonctionnement et l’Optimisation des Réseaux d’Eau sous Pression : descriptif Technique Générale

[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]TED [Axe_IRSTEA]TED-NETWATERAutresDescriptif technique du logiciel PORTEAU

Porteau 3 Documentation: User guide, April 2009

[Departement_IRSTEA]Ecotechnologies [TR1_IRSTEA]TED [Axe_IRSTEA]TED-NETWATERAutresGuide d'utilisation du logiciel Porteau en anglais

The natural history of lions in North Africa and the relevance of their depiction in the “Lions Attacking a Dromedary” diorama

The diorama “Lions Attacking a Dromedary” is notorious, not just as a remarkable 19th century example of taxidermy, but also its controversial representation of human culture and animals, its questionable accuracy and the murky ethics of the materials sourced for its construction. This study examines whether the diorama is a reasonable representation of the Barbary lion in North Africa. We review the history of lions in North Africa and their interaction with humans in the 19th and 20th centuries. The ecology and biology of North African lions, supported by scientific knowledge of the species, enables assessment of the value of diorama depiction, whether it is realistic and informative, or an artistic interpretation, or mere fiction. Furthermore, if the depiction is fictional, whether the representation is entirely unrepresentative, or at worst a stereotypic fabrication based on Western colonial perspectives of the 1800s. The paper does not explore cultural aspects, although refers to the experiences of people in local communities as well as colonial visitors through 150 documented accounts of lions in the region (modern day Morocco, Algeria, and Tunisia) between 1830 and 1960. The analysis explores whether real experiences are reflected in the depiction presented in the diorama and identifies that some aspects of the exhibit can be considered authentic, while others appear to emphasize drama rather than lived reality. Recommendations are offered for well-informed future presentation of “Lions Attacking a Dromedary.

Accelerated Solvent- and Catalyst-Free Synthesis of 1,2,3-Triazolium-Based Poly(Ionic Liquid)s

International audienceA straightforward and expeditious monotopic approach for the preparation of 1,2,3-triazo- lium-based poly(ionic liquids) (TPILs) is reported. It is based on the solvent- and catalyst-free polyaddition of an α-azide-ω-alkyne monomer in the presence of methyl iodide or N -methyl bis[(trifl uoromethyl)sulfonyl]imide alkylating agents. Poly(1,2,3-triazole)s generated in bulk or by thermal azide–alkyne cycloaddition (AAC) are quaternized in-situ to afford TPILs composed of 1,3,4- and 1,3,5-trisubsti- tuted 1,2,3-triazolium units. The physical and ion-conducting properties of the prepared samples are compared with the TPILs composed solely of 1,3,4-trisubstituted 1,2,3-triazolium units obtained through a multistep approach involving copper(I)- catalyzed AAC polyaddition, quaternization of the 1,2,3-tria- zole groups, and anion metathesis. TPILs obtained through the monotopic approach display thermal stabilities and ionic con- ductivities comparable to their pure regioisomeric analogues