The chemical surfactant flooding can mobilize the trapped oil by lowering the interfacial tension between oil and brine and in some cases altering the reservoir rock wettability. In this work, the effect of surfactants on oil/brine interfacial tension was experimentally investigated. First, the effect of surfactants concentration was surveyed. Afterwards, the effect of salinity on surfactant be...

background: high consumption of nonalcoholic beverages is one of the causes of dental erosion. annual consumption of beverages in iran is 48 lpcy (lit per capita per year) that is equal to 144 bottles per capita in year and is relatively a high rate. taking this into consideration, the present study was planned to determine the ph and fluoride content of beverages consumed in kerman, south east...

Background In most emergency departments (ED) around the world, patients are initially assessed using a triage system or risk stratification tools. The result of the scores is an important factor in determining the course of treatment for critically ill patients. Several different systems are used, but most include blood pressure, respiratory rate, pulse, and level of consciousness and the indi...

This paper addresses the design of an observer-based fault diagnosis scheme, which is applied to some of the sensors and actuators of a wind turbine benchmark model. The methodology is based on a modified sliding mode observer (SMO) that allows accurate reconstruction of multiple sensor or actuator faults occurring simultaneously. The faults are reconstructed using the equivalent output err...

A number of authors have suggested that a conditional analysis of dispositions must take roughly the following form: Thing X is disposed to produce response R to stimulus S just in case, if X were exposed to S and surrounding circumstances were auspicious, then X would produce R. The great challenge is cashing out the relevant notion of ‘auspicious circumstances’. I give a general argument whic...