EDITOR,—Xeroderma pigmentosum (XP), a rare autosomal recessive disorder characterised by defective DNA repair leading to clinical and cellular hypersensitivity to ultraviolet radiation, manifesting mainly as intolerance of skin and eyes to light, has been described in all races, but is exceedingly rare in the negroid race, although some cases have been reported in both the American and African ...

0950-5849/$ see front matter 2013 Published by http://dx.doi.org/10.1016/j.infsof.2012.10.002 ⇑ Corresponding author. E-mail address: [email protected] (S. Wood). Context: Developing a theory of agile technology, in combination with empirical work, must include assessing its performance effects, and whether all or some of its key ingredients account for any performance advantage over traditiona...

--Extreme programming (XP) is a modern approach for iterative development of software in which you never wait for the complete requirements and start development. Security is usually unnoticed during early phases of software life cycle. In this paper, our main objective is to focus on security requirements at each phase of software life cycle. In this regard, XP is a key solution that provides ...

Cell strains established from fibroblasts of 10 normal persons, 12 persons afflicted with xeroderma pigmentosum (XP), and 4 XP hétérozygotes have been used as hosts in studies on the repair of ultraviolet-irradiated human adenovirus 2. The virus appeared most ultraviolet light sensitive when strains belonging to XP complementation Groups A and D were used as hosts, less sensitive when strains...

Xeroderma pigmentosum (XP) patients fail to remove pyrimidine dimers caused by sunlight and, as a consequence, develop multiple cancers in areas exposed to light. The second most common sign, present in 20-30% of XP patients, is a set of neurological abnormalities caused by neuronal death in the central and peripheral nervous systems. Neural tissue is shielded from sunlight-induced DNA damage, ...

EDITOR,—Xeroderma pigmentosum (XP), a rare autosomal recessive disorder characterised by defective DNA repair leading to clinical and cellular hypersensitivity to ultraviolet radiation, manifesting mainly as intolerance of skin and eyes to light, has been described in all races, but is exceedingly rare in the negroid race, although some cases have been reported in both the American and African ...

In this paper, we address the containment problem for unions of XPath queries with and without schema. We find the problem can be always reduced into containment problem between one single query and a union of queries. When schema is not available, the problem can be further reduced into checking containment between pairwise queries (each from one union), but this only holds for some XPath subs...

While XP principles are independent of the languages in which software is developed, we can distinguish properties of programming languages that affect the agility of development. Some languages are inherently more agile than others, and the experience of developing software in these languages reflects this. A family of languages descended from the mathematics notation developed at Harvard in t...

Agile development methods such as eXtreme Programming (XP) are increasingly adopted by software organizations and engineers to access its effectiveness and the benefits it promises. However, XP has some limitations in certain aspects pertaining to inter-group communication and teamwork. This issue is attributed mostly to the isolation among different pair-programmer groups. In this analysis, we...