Over the past half century, computing systems have experienced over three orders of magnitude improvement in average time to failure and over seven orders of magnitude improvement in work accomplished between outages. This paper surveys, compares and contrasts the architectural techniques used to improve system reliability in space and avionics applications. The generic techniques are instantia...

Introduction: Extraintestinal pathogenic Escherichia coli (ExPEC) is associated with various diseases such as urinary tract infections, neonatal meningitis and septicemia. There are many virulence factors (VF) encoded by genes in ExPEC, including papC, papG, ecpA, iroN, fyuA, iutA, ompTp, tsh, hlyF, hlyA and iss. These virulence genes may be present in pathogenicity islands (PAI) or plasmids. M...

INTRODUCTION Extraintestinal pathogenic Escherichia coli (ExPEC) is associated with various diseases such as urinary tract infections, neonatal meningitis and septicemia. There are many virulence factors (VF) encoded by genes in ExPEC, including papC, papG, ecpA, iroN, fyuA, iutA, ompTp, tsh, hlyF, hlyA and iss. These virulence genes may be present in pathogenicity islands (PAI) or plasmids. ...

background: naegleria spp. is a free-living amoeba of which some species includ­ing n. fowleri and n. australeinsis are highly pathogenic in human and ani­mals. these widespread amoebae could be found in different environmental sources particularly in aquatic resources of tropical and subtropical regions. the most important source of infection is via recreational water contact. due to the lack ...

Environmental stress, especially drought stress, can play an important role in the reduction of the plant growth stage, specifically duringgermination in arid and semi arid regions in Iran.. In order to study the effects of drought stress on germination indices in wheat cultivars, an experiment was conducted in factorial form, using a completely randomized design of four replications. In this e...

the “kuh-e-gorm” non-hunting area is located in the northwest of jahrom city, fars province, iran. since there is no adequate knowledge on fauna of this region, a survey was conducted on the vertebrate fauna of the region from april 2007 to april 2008. in total, 124 vertebrate species were identified including: 11 fishes (belong to 10 genera, four families and three orders), four amphibians (be...