Perception des Exploitants Familiaux Producteurs de Maïs sur les Perturbations Climatiques dans l’Hinterland de Lubumbashi : Région du Haut-Katanga, RDC

Cette étude explore la manière dont les perturbations climatiques sont perçues par les agriculteurs familiaux qui produisent du maïs, notamment dans l’Hinterland de Lubumbashi. L’objectif de ce travail est de comprendre comment les exploitants familiaux de la région du Haut-Katanga en République Démocratique du Congo perçoivent les dérèglements climatiques et leurs impacts. Lors de discussions avec des agriculteurs familiaux de cinq villages, une approche d'enquête directe guidée par un questionnaire a évalué les niveaux de connaissances et les perceptions des parties prenantes sur le dérèglement climatique, ses causes potentielles et ses impacts apparents. Les données collectées ont été traitées et analysées statistiquement à l'aide du programme SPSS V25.0. Les résultats montrent que 95 % des agriculteurs percevaient les perturbations climatiques caractérisées par une reprise tardive des précipitations, des périodes de sécheresse plus longues qu'il y a plus de dix ans, une hausse des températures diurnes moyennes, des jours de plus en plus ensoleillés et une baisse du niveau d'eau des puits et des rivières. Les agriculteurs conviennent que ces perturbations ont un impact sur la productivité des cultures de maïs et que les pratiques actuelles telles que les feux de brousse, l'agriculture sur brûlis, la jachère, etc. sont non seulement peu durables mais peuvent également conduire à un dérèglement climatique. En conséquence, les agriculteurs de l’Hinterland de Lubumbashi sont témoins des perceptions climatiques et des effets qu’elles peuvent infliger au secteur. Cette étude montre que la perception des acteurs du dérèglement climatique n’entraîne pas de changements dans leurs pratiques agricoles actuelles en proportion des effets perçus et subits.   This study examines how climate disruptions are perceived by family farmers who produce maize, particularly in the Hinterland of Lubumbashi. This work aims to understand how family farmers in the Haut-Katanga region of the Democratic Republic of Congo perceive climate disruptions and their impacts. Through direct interviews with family farmers in five villages using a guided questionnaire, the study evaluated their knowledge and perception of climate disruptions, potential causes, and visible impacts. The collected data was statistically processed and analyzed using SPSS V25.0. The results show that 95% of farmers perceived climate disruptions characterized by delayed rainfall, longer drought periods compared to over a decade ago, increased average daytime temperatures, increasingly sunny days, and decreased water levels in wells and rivers. Farmers agree that these disruptions impact maize crop productivity and that current practices such as bushfires, slash-and-burn agriculture, fallow fields, etc. are unsustainable and could exacerbate climate disruptions. Therefore, family farmers in the Hinterland of Lubumbashi witness the climate perceptions and the effects they can inflict on their sector. This study reveals that the actors' perception of climate disruption does not result in changes in their current agricultural practices proportional to the perceived and experienced effects

Evolution of consumption: a psychological ownership framework

Technological innovations are creating new products, services, and markets that satisfy enduring consumer needs. These technological innovations create value for consumers and firms in many ways, but they also disrupt psychological ownership––the feeling that a thing is “MINE.” The authors describe two key dimensions of this technology-driven evolution of consumption pertaining to psychological ownership: (1) replacing legal ownership of private goods with legal access rights to goods and services owned and used by others and (2) replacing “solid” material goods with “liquid” experiential goods. They propose that these consumption changes can have three effects on psychological ownership: they can threaten it, cause it to transfer to other targets, and create new opportunities to preserve it. These changes and their effects are organized in a framework and examined across three macro trends in marketing: (1) growth of the sharing economy, (2) digitization of goods and services, and (3) expansion of personal data. This psychological ownership framework generates future research opportunities and actionable marketing strategies for firms aiming to preserve the positive consequences of psychological ownership and navigate cases for which it is a liability.Accepted manuscrip

Palynostratigraphy and palynofacies of the early Eocene Gurha lignite mine, Rajasthan, India

A 105 m early Eocene section exposed in the Gurha mine in the Nagaur-Ganganagar Basin, Rajasthan, India, archiving remains of equatorial vegetation at a time of extreme global warmth and close to the onset of the India-Eurasia collision, is investigated using palynostratigraphic and palynofacies analyses. Four palynozones e.g., Palmidites plicatus Singh, Botryococcus braunii Kützing, Triangulorites bellus Kar and Ovoidites ligneolus are identified stratigraphically on the basis of abundance of these pollen taxa over others. The occurrence of taxonomically highly diverse angiosperm pollen in all the four palynozones attests to an extremely rich near-coastal tropical flora subject to frequent wildfires under a strongly seasonal precipitation regime. Palynotaxa characteristic of these palynozones are widely distributed in other early Paleogene sediments of India. Sedimentary organic matter (structured terrestrial, biodegraded, amorphous, grey amorphous, resins, charcoal/black-brown debris and algal remains) recovered from mire and lacustrine sediments are of terrestrial origin, recording fluctuations in burial anoxia and salinity. Episodes of elevated salinity are due either to seepage of marine waters and/or a periodic excess of evaporation over precipitation at times when the depositional system was closed

French Roadmap for complex Systems 2008-2009

This second issue of the French Complex Systems Roadmap is the outcome of the Entretiens de Cargese 2008, an interdisciplinary brainstorming session organized over one week in 2008, jointly by RNSC, ISC-PIF and IXXI. It capitalizes on the first roadmap and gathers contributions of more than 70 scientists from major French institutions. The aim of this roadmap is to foster the coordination of the complex systems community on focused topics and questions, as well as to present contributions and challenges in the complex systems sciences and complexity science to the public, political and industrial spheres