It is known that asset exchange models with symmetric interaction between agents show either a Gibbs/log-normal distribution of assets among the agents or condensation of the entire wealth in the hands of a single agent, depending upon the rules of exchange. Here we explore the effects of introducing asymmetry in the interaction between agents with different amounts of wealth (i.e., the rich be...

Detection of trace levels of persistent pollutants in the environment is difficult but significant. Organic pollutant homologues, due to their similar physical and chemical properties, are even more difficult to distinguish, especially in trace amounts. We report here a simple method to detect polychlorinated biphenyls (PCBs) in soil and distilled spirit samples by the surface-enhanced Raman sc...

The monosulfides of the pyrrhotite omission series ([Formula: see text]) are important remanence carriers for paleomagnetic reconstruction Earth's crust and extraterrestrial materials. ferrimagnetic [Formula: text] polytypes endmembers, their stacking modulations full vacant layers generate different magnetic anisotropy properties due to cation-vacancy configurations. In this study, intergrown ...

Explosive eruptions involve mainly silicic magmas in which sulfur solubility and diffusivity are low. This inhibits sulfur exsolution during magma uprise as compared to more mafic magmas such as basalts. Silicic magmas can nevertheless liberate large quantities of sulfur as shown by the monitoring of SO2 in recent explosive silicic eruptions in arc settings, which invariably have displayed an e...

The Kevitsa Cu–Ni sequential flotation process is characterised by poor nickel recovery during summer periods (May–September). Evidently, the water matrix in different from that other seasons; however, Cu performance scarcely affected changes across seasons. Increasingly quality was generated through a grinding-and-dissolution protocol and its impact on electrochemical reactivity of sulphide or...

The microbially mediated recovery of valuable metals contained in mining waste presents an economical alternative to conventional hydrometallurgical processes. In order investigate the effect bacterial adaptation and biological oxidation on bioleaching, bioleaching a pyrrhotite sample from mine waste, with indigenous bacteria existing acid drainage, was studied. were sub-cultured repeatedly for...

When a person is makes a judgment and assesses confidence, what is the effect of receiving more judgment-relevant information? Following up prior research on belief updating judgments (Oskamp, 1965; Slovic, 1973), we demonstrated that the predictive accuracy of experts did not improve but their confidence climbed steadily as they received more information about the target event. Our findings sh...

It is a common assumption in evolutionary theory that a parent will distribute its resources evenly between a set of equivalent oospring. However this paper presents a theoretical model in which uneven parental investment between a set of equivalent oospring can be a preferred evolutionary strategy to equal investment in the same set of oospring. This eeect does not depend on different oospring...