abstract: the global warming process during last century has not only affected on meteorological elements but also affected on onset and end of each meteorological elements. for studying probability changes in time series of onset and end date of temperature thresholds 0 and 5 centigrade in country level and deciding the kind and its direction, daily temperature data during the past 45 years (1...

using environmental-friendly methods in order to remove or reduce oil pollutants and their derivations in the environment are developing. in this study, the biodegrading ability of bacillus subtilis .sp which has been separated from oil-polluted soil was examined. it was revealed that it can reduce surface tension of growth medium and produce bio-surfactant at 37 and 20 degrees centigrade. also...

in this study the thermal conductivity and the volumetric heat capacity of non-newtonian fluids are investigated. these fluids find many applications in chemical, medical and food industries. they mostly have viscoelastic behavior and generally differ from newtonian fluids. two non-newtonian fluids, solutions of xanthan and carboxy methyl cellulose in water with various concentrations have bee...

We develop an optimization model based on Markovian approach to determine the optimum value of thresholds in a proposed acceptance sampling design. Consider an acceptance sampling plan where items are inspected and when the number of conforming items between successive defective items falls below a lower control threshold value, then the batch is rejected, and if it falls above a control thresh...

in order to study the effect of different concentrations of salicylic acid in two commercial apricotcultivars of shahrood namely ‘shahrood 41’ and ‘jaffari’, under cold stress, a factorial experiment wasconducted in a randomized complete block design with three replications in 2012 at the agriculturalresearch center of shahrood city. the test had four factors including: sa with three levels (0....

At a combined cycle power plant, gas turbine cooling air flowrate data is required for operation and maintenance because it an important analyzing not only the temperature of both stators blades but also plant efficiency. However, very difficult to measure data. An ultrasonic flowmeter cannot be used since measurement position becomes hot, usually exceeding 300 degrees centigrade. insert type u...

A sphere phase liquid crystal (SPLC) composed of three-dimensional twist structures with disclinations among them exists between isotropic phase and blue phase in a very narrow temperature range, about several degrees centigrade. A low concentration polymer template is applied to improve the thermal stability of SPLCs and broadens the temperature range to more than 448 K. By template processing...