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Université de Fribourg

The Green Lean Amine Machine : Harvesting Electric Power While Capturing Carbon Dioxide from Breath

Kalkus, Trevor J. ; Guha, Anirvan ; Scholten, Philip B. V. ; Nagornii, Dimitrii ; Coskun, Ali ; Ianiro, Alessandro ; Mayer, Michael

In: Advanced Science, 2021, p. 2100995

As wearable technologies redefine the way people exchange information, receive entertainment, and monitor health, the development of sustainable power sources that capture energy from the user's everyday activities garners increasing interest. Electric fishes, such as the electric eel and the torpedo ray, provide inspiration for such a power source with their ability to generate massive...

Université de Fribourg

Some properties of edge intersection graphs of single-bend paths on a grid

Asinowski, Andrei ; Ries, Bernard

In: Discrete Mathematics, 2012, vol. 312, no. 2, p. 427-440

In this paper we consider graphs G whose vertices can be represented as single-bend paths (i.e., paths with at most one turn) on a rectangular grid, such that two vertices are adjacent in G if and only if the corresponding paths share at least one edge of the grid. These graphs, called B1-EPG graphs, were first introduced in Golumbic et al. (2009) [13]. Here we show that the neighborhood of every...

Université de Fribourg

How dieting might make some fatter: modeling weight cycling toward obesity from a perspective of body composition autoregulation

Jacquet, Philippe ; Schutz, Yves ; Montani, Jean-Pierre ; Dulloo, Abdul G.

In: International Journal of Obesity, 2020, vol. 44, p. 1243-1253

The notion that dieting makes some people fatter has in the past decade gained considerable interest from both epidemiological predictions and biological plausibility. Several large-scale prospective studies have suggested that dieting to lose weight is associated with future weight gain and obesity, with such predictions being stronger and more consistent among dieters who are in the normal...

Université de Fribourg

On the bend number of circular-arc graphs as edge intersection graphs of paths on a grid

Alcón, Liliana ; Bonomo, Flavia ; Durán, Guillermo ; Gutierrez, Marisa ; Mazzoleni, María Pía ; Ries, Bernard ; Valencia-Pabon, Mario

In: Discrete applied mathematics, 2018, vol. 234, p. 12-21

Golumbic, Lipshteyn and Stern [12] proved that every graph can be represented as the edge intersection graph of paths on a grid (EPG graph), i.e., one can associate with each vertex of the graph a nontrivial path on a rectangular grid such that two vertices are adjacent if and only if the corresponding paths share at least one edge of the grid. For a nonnegative integer k, Bk-EPG graphs are...

Università della Svizzera italiana

Adding a temporal dimension to the analysis of argumentative discourse : justified reframing as a means of turning a single-issue discussion into a complex argumentative discussion

Greco, Sara ; Schär, Rebecca ; Pollaroli, Chiara ; Mercuri, Chiara

In: Discourse Studies, 2018, vol. 20, no. 6, p. 1-17

This paper seeks to extend existing models of argumentation by considering an important dimension of real-life argumentative discourse: how complex argumentative discussions evolve over time. We define a complex argumentative discussion as a multi-issue discussion, in which the different issues are interrelated in the form of a hierarchy. We claim that justified reframing might be used to...

Université de Fribourg

Collateral fattening in body composition autoregulation: its determinants and significance for obesity predisposition

Dulloo, Abdul G. ; Miles-Chan, Jennifer L. ; Schutz, Yves

In: European Journal of Clinical Nutrition, 2018, vol. 72, no. 5, p. 657–664

Collateral fattening refers to the process whereby excess fat is deposited as a result of the body’s attempt to counter a deficit in lean mass through overeating. Its demonstration and significance to weight regulation and obesity can be traced to work on energy budget strategies in growing mammals and birds, and to men recovering from experimental starvation. The cardinal features of...

Université de Fribourg

In vivo quantification of mechanical properties of caudal fins in adult zebrafish

Puri, Sahil ; Aegerter-Wilmsen, Tinri ; Jaźwińska, Anna ; Aegerter, Christof M.

In: Journal of Experimental Biology, 2018, vol. 221, no. 4, p. jeb171777

Skip to Next SectionThe caudal fins of adult zebrafish are supported by multiple bony rays that are laterally interconnected by soft interray tissue. Little is known about the fin's mechanical properties that influence bending in response to hydrodynamic forces during swimming. Here, we developed an experimental setup to measure the elastic properties of caudal fins in vivo by applying...

Université de Fribourg

Band bending in Mg-colored and O₂-activated ultrathin MgO(001) films

Jaouen, Thomas ; Hildebrand, Baptiste ; Aebi, Philipp ; Delhaye, G. ; Tricot, S. ; Lépine, B. ; Jézéquel, G. ; Schieffer, P.

In: The Journal of Physical Chemistry C, 2017, vol. 121, no. 8, p. 4363–4367

Ultrathin MgO films grown on Ag(001) have been investigated using X-ray and ultraviolet photoemission spectroscopies for oxide films successively exposed to Mg and O₂ flux. Studying work functions and layer-resolved Auger shifts allows us to keep track of band profiles from the oxide surface to the interface and reveal the charge- transfer mechanisms underlying the controlled creation of...