Fractured carbonate reservoirs account for 25% of world’s total oil resources and for 90% of Iranian oil reserves. Since calcite and dolomite minerals are oil wet, gas oil gravity drainage (GOGD) is known as the most influencing production mechanism. The most important issue within gas injection into fractured media is the channeling problem which makes the efficiency of gas injection process e...

The analysis of nested structures in sets of species assemblages across different sites or in networks of interspecific interactions has become common practice in ecological studies. Although new analyses and metrics have been proposed, few studies have scrutinized the concepts that subtend nestedness analysis. We note two important conceptual problems that can lead to terminological inconsiste...

after forty years, the act of motor vehicle compulsory insurance was amended in 1387(2008).the act has changed some areas and protected third parties rather than former act. some protections are: increasing third parties, development of sphere of insurance and acceptance of an insurance policy as a mortgage in courts. however we see some ambiguities in the late act. the article analyses changes...

An exhaustive classification of matrix effects occurring when a sample preparation is performed prior to liquid-chromatography coupled to mass spectrometry (LC-MS) analyses was proposed. A total of eight different situations were identified allowing the recognition of the matrix effect typology via the calculation of four recovery values. A set of 198 compounds was used to evaluate matrix effec...

The cone matrix sheath is a biochemically and structurally distinct domain of the retinal interphotoreceptor matrix that is specifically associated with cone photoreceptor cell inner and outer segments. An aqueous extraction technique for the isolation of cone matrix sheath-enriched retinal fractions was developed and used to examine the structure and composition of this extracellular matrix do...

This paper shows how changes in generational accounts relate to the gen­ erational incidence of fiscal policy. To illustrate the relationship, it uses the Auerbach-KotlikofF Dynamic Life-Cycle Simulation Model to compare policyinduced changes in generational accounts with actual changes in generations' Utilities. The paper considers a wide ränge of policies in closed and small open economies as...