A certified program analysis is an analysis whose implementation is accompanied by a checkable proof of soundness. We present a framework whose purpose is to simplify the development of certified program analyses without compromising the run-time efficiency of the analyses. At the core of the framework is a novel technique for automatically extracting Coq proof-assistant specifications from ML ...

A method has been developed that allows the isolation of genomic clones from a cosmid library by homologous recombination in vivo. This method was used to isolate a human genomic interleukin 2 (IL2) gene. The genomic cosmid library was packaged in vivo into lambda phage particles. A recombination-proficient host strain carrying IL2 cDNA sequences in a non-homologous plasmid vector was infected ...

the first step in the design of plate girder is to estimate the self-weight of it. although empirical formulae for the same are available, the level of their accuracy (underestimate or overestimate) with respect to actual self-weight is not known. in this paper, optimized sections are obtained for different spans subjected to different live load carrying capacities and self-weights are estimate...

A method for preparation of Escherichia coli ribosomes carrying lethal mutations in 23 S rRNA was developed. The method is based on the site-directed incorporation of a streptavidin binding tag into functionally neutral sites of the 23 S rRNA and subsequent affinity chromatography. It was tested with ribosomes mutated at the 23 S rRNA position 2655 (the elongation factor (EF)-G binding site). R...

This study was conducted in Alzzazah area which lies approximately 25 km East of El-Dmazein city, the capital of the Blue Nile State, Sudan. This study was carried out at the end of the autumn 2015. The aim of the study was to evaluate the impacts of continuous grazing on the rangeland of the study area. To determine this effect, two range sites were selected to represent the rangeland in the s...

The basic idea of evolutionary game theory is that payoff determines reproductive rate. Successful individuals have a higher payoff and produce more offspring. But in evolutionary and ecological situations there is not only reproductive rate but also carrying capacity. Individuals may differ in their exposure to density limiting effects. Here we explore an alternative approach to evolutionary g...

Out of annotated programs proof carrying code systems construct and prove verification conditions that guarantee a given safety policy. The annotations may come from various program analyzers and must not be trusted as they need to be verified. A generic verification condition generator can be utilized such that a combination of annotations is verified incrementally. New annotations may be veri...

Constrained devices often have a need for access to a network for their intended services. They have some of the same security requirements for network access authentication as other network devices but the devices and environments that they operate within are quite different. These resource limited devices and the associated network environment pose additional challenges for adopting existing ...

Modular and local reasoning about object-oriented programs has been widely studied for programing languages such as C# and Java. Once source programs have been proven, the next verification challenge is to ensure that the code produced by the compiler is correct. Since verifying a compiler can be extremely complex, this paper uses proof-transforming compilation, an alternative approach which au...