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Many software development projects struggle with creating and communicating a testing culture that is appropriate for the project's needs. This may degrade software quality by leaving defects undiscovered. Previous research suggests that social coding sites such as GitHub provide a collaborative environment with a high degree of social transparency.(More)
The experience factory concept enables systematic learning and continuous improvement in software development. As with most learning initiatives, it is hard to establish. In our experience, there is a great deal of uncertainty and skepticism about the mission and contents of an experience factory. The starting phase is especially endangered through pitfalls(More)
A polyol dehydrogenase was detected in cell extracts of the facultative phototrophic bacterium Rhodobacter sphaeroides strain Si 4 grown on D-glucitol (sorbitol) as the sole carbon source. The enzyme was purified 150-fold to apparent homogeneity by steps involving fractionated (NH4)2SO4 precipitation, chromatography on Q-Sepharose and phenyl-Sepharose, and(More)
Transmissible spongiform encephalopathies (TSE) is a group of diseases that is unique in comprising disorders that can occur sporadically, are hereditary and/or infectious. The transmissible pathogen--the prion--is distinct from all other pathogens in being devoid of nucleic acids. During the elucidation of these disorders, many different--and(More)
Building secure systems is difficult for many reasons. This paper deals with two of the main challenges: (i) the lack of security expertise in development teams, and (ii) the inadequacy of existing methodologies to support developers who are not security experts. The security standard ISO 14508 (Common Criteria) together with secure design techniques such(More)
The multitude of social media channels that programmers can use to participate in software development has given rise to online developer profiles that aggregate activity across many services. Studying members of such developer profile aggregators, we found an ecosystem that revolves around the <i>social programmer</i>. Developers are assessing each other(More)
Transposon mutagenesis and antibiotic enrichment were employed to isolate a mutant of Rhodobacter sphaeroides Si4 designated strain M22, that had lost the ability to grow on D-mannitol and to produce the enzyme mannitol dehydrogenase (MDH). DNA flanking the transposon in the mutant strain was used as a probe for the identification and cloning of the MDH(More)
Software prototypes are becoming more and more important, as computer applications invade new domains and as personal prototyping environments become more powerful. Although numerous approaches recommend their use, prototypes are sometimes treated like their developers' personal toys, and little effort is made to extract and share the experiences and(More)