Traditional centralized access control has some shortcomings in robustness, trustworthiness and circulation.Blockchains have the advantages of fault tolerance and trust.Smart contracts have the characteristics of automatic execution and flexible expansion.Tokens can well record credential information and transfer easily.In this paper, blockchain, s
Information on soil erosion and related sedimentation processes are very important for natural resource management and sustainable farming.Plenty of models are available for studying soil erosion but only a few are suitable for dynamic soil erosion assessments at the field-scale.To date, there are no field-scale dynamic models available considering
This paper analyses the causes of Rib Balaclava economic crisis trying to reconcile the theory of "animal spirits" with the money supply expansion.It also aims to show the limits of the two opposing theories: both of the Keynesian and the Austrian ones, and to investigate the economic crisis in Greece, focusing on the causes that triggered it.This