Aymeric Spiga
https://web.lmd.jussieu.fr/~aspiga
#Climate scientist and #Astrophysicist, Modeling #atmospheres of #planets: Mars, Saturn, Venus, Jupiter, Titan, the Earth
Maître de Conférences Hors Classe à la Faculté des Sciences de #Sorbonne Université
Chercheur au Laboratoire de Météorologie Dynamique / Institut Pierre Simon Laplace
Membre de #Labos1point5
2. #MonMaster va-t-il sauver la méritocratie ?
Une hypothèse autour de la rupture des flux L3-M1.
https://blog.educpros.fr/julien-gossa/2023/06/07/mon-master-va-t-il-sauver-la-meritocratie/
18 présidentes et présidents d'université ont signé le communiqué commun contre les mesures contenus dans le projet de loi immigration.
(désolé par de texte alt, le communiqué a été envoyé en images sur Twitter)
I wrote something in my blog about different ways of approaching scientific research, and the differences and complementarities between dog- and butterfly-type scientists #academicchatter #transition #astrophysics #ecology
(you can follow @Francois on mastodon to be tooted automatically about future posts)
https://lookingup.francois-rincon.org/dogs-and-butterflies/
I wrote something to explain why and how staying professionally in the realm of obscure fundamental academic research, while transitioning from astro to ecology, is currently the best way for me to serve the ecological cause I want to serve 💚🍂
Reminder that you can follow this blog by rss, or by following @Francois (my author posts) or @lookingup.francois-rincon.org (all posts) on mastodon!
I am very excited to introduce a new online space,
https://lookingup.francois-rincon.org
where I will be posting musings on my recently initiated research career transition from astrophysics to ecology. I would like this place to be a lively forum, especially for scientists involved in similar matters. First post is online 🎉 , boosts welcome ! 💚 🍂 🔭 #Astrodon #Ecology
You can register by following @[email protected] or using the rss feed link on the site.
[#VeilleESR #DataESR] Panorama des personnels enseignants de l'enseignement supérieur
Petit tour de quelques chiffres sur l'ESR.
[#VeilleESR #LRU] Budget : en cette rentrée, les universités "sous tension" et inquiètes quant aux impacts des mesures non compensées et les incertitudes liées aux prélèvements sur les fonds de roulement, ainsi que sur la taxe d'apprentissage.
Comment les présidentes et présidents d’universités abordent-ils cette rentrée 2023-2024 ? Sur le front budgétaire, l’atterrissage va être difficile, souligne Michel Deneken (Strasbourg), du fait de la compensation partielle des mesures de revalorisation salariale dans la fonction publique, dont l’annonce a fait l’effet d’une douche froide. Nous demander de prélever dans notre FDR pour financer du point d’indice serait tristement court-termiste, estime Mathias Bernard (Clermont Auvergne), tandis que Nathalie Dompnier (Lyon-II) souligne que la précarité étudiante est la préoccupation numéro 1.
A new #study published a few days ago is evaluating the #sustainability of Low-#Earth orbit #satellite broadband #megaconstellations.
The authors find that over 5 years, the #StarLink project would emit between ~0.5 and 1 tonne CO2eq per subscriber, and up to ~3 t CO2eq / subscriber for #Amazon's #Kuiper project. Those values are 31-91 times HIGHER than eq. terrestrial #mobile #broadband.
read more: https://arxiv.org/abs/2309.02338
(1/3)
The growth of megaconstellations is rapidly increasing the number of rocket launches. While Low Earth Orbit (LEO) broadband satellites help to connect unconnected communities and achieve the Sustainable Development Goals (SDGs), there are also significant environmental emissions impacts from burning rocket fuels. We present sustainability analytics for phase 1 of the three main LEO constellations including Amazon Kuiper (3,236 satellites), Eutelsat Group`s OneWeb (648 satellites), and SpaceX Starlink (4,425 satellites). We find that LEO megaconstellations provide substantially improved broadband speeds for rural and remote communities, but are roughly 6-8 times more emissions intensive (250 kg CO2eq/subscriber/year) than comparative terrestrial mobile broadband. In the worst-case emissions scenario, this rises to 12-14 times more (469 kg CO2eq/subscriber/year). Policy makers must carefully consider the trade-off between connecting unconnected communities to further the SDGs and mitigating the growing space sector environmental footprint, particularly regarding phase 2 plans to launch an order-of-magnitude more satellites.
Julien Gossa
Martin Clavey
François
Prof. Stefan Rahmstorf
Mark A Lemley
Dr. Alexandre Santerne 🌍