Concept
Théorie des groupes
Publications associées (215)
Mean value theorems for collections of lattices with a prescribed group of symmetries
Euclidean lattices are mathematical objects of increasing interest in the fields of cryptography and error-correcting codes. This doctoral thesis is a study on high-dimensional lattices with the motivation to understand how efficient they are in terms of b ...
EPFL2024Biobased surfactant
Jeremy Luterbacher, Songlan Sun, Stefania Bertella, Anastasiia Komarova
The present invention relates to a compound of the general formula (I), and (II)wherein one of R11 and R12 is hydrogen and the other is -CH2-R70, and one of R13 and R14 is hydrogen and the other is -CH2-R71, or wherein one of R11 and R12 is hydrogen and th ...
2024Biobased surfactant
Jeremy Luterbacher, Songlan Sun, Stefania Bertella, Anastasiia Komarova
The present invention relates to a compound of the general formula (I), (II) and (III), more specifically of formula (Ia), (Ib), (Ic)wherein R11 and R12 or R21 and R22 or R31 and R32 are both hydrogen or form together with CHR50 a cyclic moiety or one of R ...
2024Method for preparing an at least partially acetal-protected sugar
Jeremy Luterbacher, Songlan Sun, Lorenz Perry Manker, Anastasiia Komarova
The present invention relates to a method for preparing an at least partially acetal-protected sugar involving the step of reacting a sugar or a sugar derivative selected from the group consisting of an aldopentose, an aldohexose, an aldopentoside and an a ...
2024Disagreement and fragmentation in growing groups
The arise of disagreement is an emergent phenomenon that can be observed within a growing social group and, beyond a certain threshold, can lead to group fragmentation. To better understand how disagreement emerges, we introduce an analytically tractable m ...
PERGAMON-ELSEVIER SCIENCE LTD2023Spatial symmetries in nonlocal multipolar metasurfaces
Olivier Martin, Karim Achouri, Ville Tuovi Tiukuvaara
We propose a framework that connects the spatial symmetries of a metasurface to its material parameter tensors and its scattering matrix. This provides a simple and universal way to effortlessly determine the properties of a metasurface scattering response ...
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS2023Biobased surfactants
Jeremy Luterbacher, Songlan Sun, Stefania Bertella, Anastasiia Komarova
Compound of the general formula (Ia), (Ib) and (Ic) R50 and R60 are different form each other and are selected from the group consisting of -R70, -ZR70, -Z-OH, -Z-NH2, -Z-SH, -Z-OC(O)R70, -OC(O)R70, - COOH and its corresponding salts, -C(O)NH2, -C(O)NH-R70 ...
2023Indentation and stability of woven domes
Pedro Miguel Nunes Pereira de Almeida Reis, Célestin Vallat, Tian Chen, Tomohiko Sano, Samuel Jean Bernard Poincloux
Discrete domes are doubly curved structures comprising a network of beam-like elements. We study the mechanics of discrete domes made of ribbons woven in a pentagonal triaxial pattern. Experiments and finite element simulations are performed to characteriz ...
ELSEVIER2023Epidemic Learning: Boosting Decentralized Learning with Randomized Communication
Rachid Guerraoui, Anne-Marie Kermarrec, Sadegh Farhadkhani, Rafael Pereira Pires, Rishi Sharma, Marinus Abraham de Vos
We present Epidemic Learning ( EL ), a simple yet powerful decentralized learning (DL) algorithm that leverages changing communication topologies to achieve faster model convergence compared to conventional DL approaches. At each round of EL, each node sen ...
2023Effect of Different Communication Affordances on the Emergence of Collaboration Strategies in an Online Multiplayer Game
Pierre Dillenbourg, Barbara Bruno, Hala Khodr, Aditi Kothiyal
In a group, the collective dynamics is governed by the inter- actions between individuals, which can manifest differently depending on the available means of communication. In this paper, we compare 3 conditions of communication affordances (global chat, l ...
Springer2022