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Université de Fribourg

Enigmatic dinosaur precursors bridge the gap to the origin of Pterosauria

Ezcurra, Martín D. ; Nesbitt, Sterling J. ; Bronzati, Mario ; Vecchia, Fabio Marco Dalla ; Agnolin, Federico L. ; Benson, Roger B. J. ; Egli, Federico Brissón ; Cabreira, Sergio F. ; Evers, Serjoscha W. ; Gentil, Adriel R. ; Irmis, Randall B. ; Martinelli, Agustín G. ; Novas, Fernando E. ; Silva, Lúcio Roberto da ; Smith, Nathan D. ; Stocker, Michelle R. ; Turner, Alan H. ; Langer, Max C.

In: Nature, 2020, vol. 588, no. 2020-7838, p. 445–449

Pterosaurs were the first vertebrates to evolve powered flight1 and comprised one of the main evolutionary radiations in terrestrial ecosystems of the Mesozoic era (approximately 252–66 million years ago), but their origin has remained an unresolved enigma in palaeontology since the nineteenth century2,3,4. These flying reptiles have been hypothesized to be the close relatives of a wide...

Haute école de gestion de Genève

How much can bulk stores help reduce carbon footprint by limiting plastic food packaging ?

Jarel Rodriguez, Anaïs ; Milet, Emmanuel (Dir.)

Mémoire de bachelor : Haute école de gestion de Genève, 2020 ; TDIBM 67.

This report focuses on the quantity of food packaging waste consumed by an average single individual, residing in Switzerland. It is based on the household budget survey published by the Federal Statistical Office (FSO). This budget survey mentions the food quantities monthly consumed by a single individual and thus, the packaging waste could be computed accordingly. The objective is to compare...

Université de Fribourg

Dynamical conductivity of lithium-intercalated hexagonal boron nitride films : A memory function approach

Rukelj, Zoran

In: Physical Review B, 2020, vol. 102, no. 20, p. 205108

This work is a study of dynamical conductivity of a quasi-two-dimensional heterostructure Li(BN)8. The conducting electrons have a free-electron-like parabolic dispersion and are assumed to scatter only on acoustic phonons. The approach used to derive the generalized Drude relation with frequency and temperature dependent relaxation consists of defining the induced current density as a...

Université de Fribourg

A review of the fossil record of old world turtles of the clade pan-trionychidae

Georgalis, Georgios L. ; Joyce, Walter G.

In: Bulletin of the Peabody Museum of Natural History, 2017, vol. 58, no. 1, p. 115–208

Turtles of the clade Pan-Trionychidae have a rich fossil record in the Old World, ranging from the Early Cretaceous (Hauterivian) to the Holocene. The clade most probably originated in Asia during the Early Cretaceous but spread from there to the Americas and Europe by the Late Cretaceous, to India and Australia by the Eocene, and to Afro-Arabia by the Neogene. The presence of a single...

Bibliothèque cantonale jurassienne

Dinosaur lactation ?

Else, Paul L.

In: Journal of experimental biology, 2013, vol. 216, p. 1-5