The problem of nding the minimum topology of multipro-cessing substrates supporting parallel execution of any given neighbourhood constrained system is proposed and possible optimal strategies are investigated based on the relationship between Barbosa's scheduling by edge reversal-SER-distributed algorithm and the minimum clique covering problem. It is shown that from any given clique covering ...

The second author’s ω, ∆, χ conjecture proposes that every graph satisties χ ≤ d 1 2 (∆ + 1 + ω)e. In this paper we prove that the conjecture holds for all claw-free graphs. Our approach uses the structure theorem of Chudnovsky and Seymour. Along the way we discuss a stronger local conjecture, and prove that it holds for claw-free graphs with a three-colourable complement. To prove our results ...

Dose and schedule are important factors in the therapy of cancer. Animal model and clinical data show that there is a significant correlation between dose-intensity and survival; moreover, the shortening of interval between chemotherapy cycles prevents from tumor regrowth and maximize the effect of chemotherapy on cancer cells (Gregory SA, Trumper L, 2005). Most of anti-cancer drugs are non-sel...

This paper explores the dynamic effects of trade liberalization on tax revenue using a worldwide panel dataset. Results point to statistically significant negative effect (non- resource) revenues in short term and no medium term. Liberalization also alter structure tilting toward indirect taxes away from direct ones. Economies which have implemented value added prior mitigated its revenues. The...

abstract background: the emotional bond that a mother feels towards her infant is critical to their social, emotional, and cognitive development. this concept has a major influence on an infant’s future health, and growth, so the assessment of parental-fetal attachment and related factors is of great importance. this study aimed to examine the effect of psychological intervention on attachment ...

Learning Communities is one approach in individuals to improve their skills and knowledge. Web based learning communities provide additional capabilities such as global distribution of participants and asynchronous participation. The learning process in such communities is flexible and distributed, but still uni-directional: knowledge, advices and support is transferred from professors to stude...