MateMusiC: mixing maths and music in an interactive show

Making maths accessible to the general public and to students is not an easy task, but what happens when you can ¿hear¿ that maths? We present in this article a show performed together with musicians that unravels the mathematical secrets hidden behind the music. The show is interactive so that at the end of the performance the public can play music together with the musicians.Peer ReviewedObjectius de Desenvolupament Sostenible::4 - Educació de QualitatPostprint (published version

Small dung beetles of Colombia (Coleoptera Scarabaeoidea Aphodiinae) I: Preliminary catalog and key for registered species

Los escarabajos Aphodiinae (Coleoptera: Scarabaeidae), en su mayoría de hábitos saprófagos, constituyen un grupo de amplia distribución mundial; relativamente diverso en los trópicos, pero poco conocido y estudiado por sus hábitos crípticos y su compleja taxonomía. Objetivo: Inventariar las especies colombianas y aportar claves taxonómicas de los registros encontrados en la literatura del grupo. Metodología: Para el primer caso (catálogo) fueron consultadas múltiples fuentes bibliográficas, en menor grado algunas especies y registros fueron estudiados en la colección del primer autor (Colección Familia Pardo-LocarnoCFPL-COL). Posteriormente se elaboró una clave taxonómica. Resultados: Los resultados abarcaron 20 géneros y 56 especies de Aphodiinae para Colombia; aportando una clave a nivel de tribus, géneros y especies. Conclusiones: Los resultados permiten inferir que el grupo podría estar poco muestreado y por lo mismo, ser mucho más diverso de lo que aquí se anota; igualmente se espera que nuevos estudios precisen los mapas de distribución de las especies, los cuales ahora se observan muy fragmentarios.The Small Dung Beetles (Coleoptera: Scarabaeidae: Aphodiinae), mostly saprophagous habits, are a group of wide global distribution, relatively diverse in the tropics, although they are little known and studied for their cryptic habits and complex taxonomy. Given the above and with a view to promoting its study, this research was proposed, inventory the Colombian species and provide taxonomic keys of the records found in the literature of the group. For the first case (catalog), multiple bibliographic sources were consulted, to a lesser degree some species and records were studied in the collection of the first author (Colección Familia Pardo-Locarno-CFPL-COL). Followed by the above, a taxonomic key was elaborated. The results covered 20 genera and 56 species of Aphodiinae for Colombia, providing a key at the level of tribes, genera and species. These results allow us to infer that the group could be poorly sampled and, therefore, be much more diverse than what is noted here, it is also expected that new studies will specify the distribution maps of the species, which are now very fragmentary

A robust comparison of dynamical scenarios in a glass-forming liquid

We use Bayesian inference methods to provide fresh insights into the sub-nanosecond dynamics of glycerol, a prototypical glass-forming liquid. To this end, quasielastic neutron scattering data as a function of temperature have been analyzed using a minimal set of underlying physical assumptions. On the basis of this analysis, we establish the unambiguous presence of three distinct dynamical processes in glycerol, namely, translational diffusion of the molecular centre of mass and two additional localized and temperature-independent modes. The neutron data also provide access to the characteristic length scales associated with these motions in a model-independent manner, from which we conclude that the faster (slower) localized motions probe longer (shorter) length scales. Careful Bayesian analysis of the entire scattering law favors a heterogeneous scenario for the microscopic dynamics of glycerol, where molecules undergo either the faster and longer or the slower and shorter localized motions.Peer ReviewedPostprint (author's final draft