the wet and dry spells can be defined as a number of consecutive months with rain amount greater or less than the truncation level, respectively.analysis of the wet and dry spell properties of monthly rainfall series at 40 meteorology stations in the golestan province is carried out for an extended period of 34 years (1974–2007). the results proved that the patterns of wet and dry spell duratio...

Getting the most from power-law-type data can be challenging. James Sethna points out some of pitfalls in studying power laws arising emergent scale invariance, as well important opportunities.

Once the responsibilities of central bank increases, developing good governance for achieving its different aims to satisfy the required statutory power becomes more complicated. In the case of the central bank of Islamic republic of Iran - as monetary policymaker and supervisor-this issue is valid as well. Considering the necessity of independency, accountability, and transparency for developi...

Introduction The last ten years have been marked by important discoveries and scientific advances in our understanding of biodiversity. The emergence of new fields, such as bioinformatics, ecoinformatics, and computational ecology (Helly et al., 1995; Spengler, 2000; Green et al., 2005) has brought about an informational revolution by making available massive data sets on the composition, distr...