Fingerprints of Majorana fermions in current-correlations measurements from a superconducting tunnel microscope

We compute various current correlation functions of electrons flowing from a topological nanowire to the tip of a superconducting scanning tunnel microscope and identify fingerprints of a Majorana bound state. In particular, the spin resolved cross-correlations are shown to display a clear distinction between the presence of a such an exotic state (negative correlations) and an Andreev bound state (positive correlations). Similarity and differences with measurements with a normal tunnel microscope are also discussed, like the robustness to finite temperature for instance.Comment: 7 pages, 2 figure

Bankable emission permits under uncertainty and optimal risk-management rules.

This article proposes a theory of banking of emission permits under conditions of regulatory uncertainty. Based on a two-period partial equilibrium framework, we examine the effects of increasing risk - in the sense of a mean-preserving spread - regarding a future permits allocation at the firm-level. We also examine the role of an agency to pool risks by re-allocating permits for a group of firms. Our results are twofold. First, an increase in risk may lead to changes in a firm’s banking strategy, depending on the third partial derivative of its production function with respect to pollution. Second, we define an optimal risk-sharing rule between agents to respond to political decision changes. Our results overall suggest that the bankability of permits may be used as a risk-management tool.Banking; Emission permits; Policy risk; Uncertainty;

As precipitaçoes na regiao de Cruz Alta e Ijui, RS, Brasil

Après avoir présenté les grandes causes des précipitations dans la région de Cruz Alta et Ijui, l'auteur propose une analyse de la pluviométrie régionale critiquée à travers la Méthode du Vecteur Régional (Hiez, 1977). Les principales caractéristiques statistiques des pluviométries annuelles, mensuelles et journalières sont établies à partir de trois postes disposant de plus de 35 années d'observation. Ensuite, une analyse plus fine des averses est réalisée sur les enregistrements pluviographiques du poste d'Ijui (24 années d'observation), proposant le tableau des statistiques intensité-durée-fréquence, et une étude détaillée de la forme et de l'occurence des averses prises individuellement. (Résumé d'auteur

Hydrological processes in a small humid savanna basin (Ivory Coast)

International audienc