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Université de Fribourg

From chaos to many-body localization: some introductory notes

Chotorlishvili, L. ; Stagraczyński, S. ; Schüler, Michael ; Berakdar, J.

In: Acta Physica Polonica A, 2019, vol. 135, no. 6, p. 1155–1162

Staring from the kicked rotator as a paradigm for a system exhibiting classical chaos, we discuss the role of quantum coherence resulting in dynamical localization in the kicked quantum rotator. In this context, the disorder-induced Anderson localization is also discussed. Localization in interacting, quantum many-body systems (many-body localization) may also occur in the absence of...

Université de Fribourg

Review of emerging japanese encephalitis virus: new aspects and concepts about entry into the brain and inter-cellular spreading

Filgueira, Luis ; Lannes, Nils

In: Pathogens, 2019, vol. 8, no. 3, p. 111

Japanese encephalitis virus (JEV) is an emerging flavivirus of the Asia-Pacific region. More than two billion people live in endemic or epidemic areas and are at risk of infection. Recently, the first autochthonous human case was recorded in Africa, and infected birds have been found in Europe. JEV may spread even further to other continents. The first section of this review covers...

Università della Svizzera italiana

A privacy-aware and secure system for human memory augmentation

Bexheti, Agon ; Langheinrich, Marc (Dir.)

Thèse de doctorat : Università della Svizzera italiana, 2019 ; 2019INFO011.

The ubiquity of digital sensors embedded in today's mobile and wearable devices (e.g., smartphones, wearable cameras, wristbands) has made technology more intertwined with our life. Among many other things, this allows us to seamlessly log our daily experiences in increasing numbers and quality, a process known as ``lifelogging''. This practice produces a great amount of pictures and videos...

Université de Fribourg

The influence of substituents on gelation and stacking order of oligoaramid – based supramolecular networks

Drechsler, Susanne ; Balog, Sandor ; Kilbinger, Andreas F. M. ; Casalini, Tommaso

In: Soft Matter, 2019, vol. 15, no. 36, p. 7250–7261

Self-assembly has proven to be a powerful tool for functional, smart materials such as hydrogels derived from low molecular weight compounds. However, the targeted design of functional gelators remains difficult. Here, we present a set of four Y-shaped aromatic amide tetramers with varying functionalities able to undergo different non- covalent interactions. These compounds were explored...

Université de Fribourg

Coupling of electronic and nuclear motion in a negative ion resonance: Experimental and theoretical study of benzene

Allan, Michael ; Čurík, Roman ; Čársky, Petr

In: The Journal of Chemical Physics, 2019, vol. 151, no. 6, p. 064119

We present calculated and measured elastic and vibrational excitation cross sections in benzene with the objective to assess the reliability of the theoretical method and to shed more light on how the electronic motion of the incoming electron is coupled with the nuclear motion of the vibrations. The calculation employed the discrete momentum representation method which involves solving the...

Université de Fribourg

Wolbachia modifies thermal preference in Drosophila melanogaster

Truitt, Amy M. ; Kapun, Martin ; Kaur, Rupinder ; Miller, Wolfgang J.

In: Environmental Microbiology, 2019, vol. 21, no. 9, p. 3259–3268

Environmental variation can have profound and direct effects on fitness, fecundity, and host–symbiont interactions. Replication rates of microbes within arthropod hosts, for example, are correlated with incubation temperature but less is known about the influence of host–symbiont dynamics on environmental preference. Hence, we conducted thermal preference (Tp) assays and tested if...

Université de Fribourg

Distinct genomic signals of lifespan and life history evolution in response to postponed reproduction and larval diet in Drosophila

Hoedjes, Katja M. ; van den Heuvel, Joost ; Kapun, Martin ; Keller, Laurent ; Flatt, Thomas ; Zwaan, Bas J.

In: Evolution Letters, 2019, p. -

Reproduction and diet are two major factors controlling the physiology of aging and life history, but how they interact to affect the evolution of longevity is unknown. Moreover, although studies of large‐effect mutants suggest an important role of nutrient sensing pathways in regulating aging, the genetic basis of evolutionary changes in lifespan remains poorly understood. To address these...

Université de Fribourg

Large-scale analysis of the mycoplasma bovis genome identified non-essential, adhesion- and virulence-related genes

Josi, Christoph ; Bürki, Sibylle ; Vidal, Sara ; Dordet-Frisoni, Emilie ; Citti, Christine ; Falquet, Laurent ; Pilo, Paola

In: Frontiers in Microbiology, 2019, vol. 10, p. -

Mycoplasma bovis is an important pathogen of cattle causing bovine mycoplasmosis. Clinical manifestations are numerous, but pneumonia, mastitis, and arthritis cases are mainly reported. Currently, no efficient vaccine is available and antibiotic treatments are not always satisfactory. The design of new, efficient prophylactic and therapeutic approaches requires a better understanding of the...

Université de Fribourg

Striatal responsiveness to reward under threat‐of‐shock and working memory load : A preliminary study

Gaillard, Claudie ; Guillod, Matthias ; Ernst, Monique ; Torrisi, Salvatore ; Federspiel, Andrea ; Schoebi, Dominik ; Recabarren, Romina E. ; Ouyang, Xinyi ; Mueller-Pfeiffer, Christoph ; Horsch, Antje ; Homan, Philipp ; Wiest, Roland ; Hasler, Gregor ; Martin-Soelch, Chantal

In: Brain and Behavior, 2019, no. 9, p. 1-21

Introduction: Reward and stress are important determinants of motivated behaviors. Striatal regions play a crucial role in both motivation and hedonic processes. So far, little is known on how cognitive effort interacts with stress to modulate reward processes. This study examines how cognitive effort (load) interacts with an unpredictable acute stressor (threat-of-shock) to modulate motivational...

Università della Svizzera italiana

Dissecting human antibody responses: useful, basic and surprising findings

Lanzavecchia, Antonio

In: EMBO molecular medicine, 2018, vol. 10, p. e8879

Human memory B cells and plasma cells represent a rich source of antibodies that have been selected in response to human pathogens. In the last decade, different methods have been developed to interrogate the human memory repertoire and isolate monoclonal antibodies. I will discuss how a target‐agnostic approach based on high‐throughput screening of antibodies produced by cultured B cells...