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The notion of time is ubiquitous in any activity that requires intelligence. In particular , several important notions like change, causality, action are described in terms of time. Therefore, the representation of time and reasoning about time is of crucial importance for many Artiicial Intelligence systems. Speciically during the last 10 years, it has(More)
Temporal Constraint Satisfaction is an information technology useful for representing and answering queries about temporal occurrences and temporal relations between them. Information is represented as a Constraint Satisfaction Problem (CSP) where variables denote event times and constraints represent the possible temporal relations between them. The main(More)
We present empirical evidence that the distribution of eeort required to solve CSPs randomly generated at the 50% satissable point, when using a backtracking algorithm, can be approximated by two standard families of continuous probability distribution functions. Solvable problems can be modelled by the Weibull distribution , and unsolvable problems by the(More)
Electronegative LDL (LDL(-)) constitutes a plasma subfraction of LDL with proinflammatory properties. Its proportion is increased in familial hypercholesterolemia (FH); however, the characteristics of LDL(-) isolated from FH subjects have not been previously studied. In this work, the composition, oxidative status, and inflammatory capacity on endothelial(More)
The objective of the study was to evaluate the stages of change for cessation in smoking after the application of American Diabetes Association recommendations in diabetic patients who smoke. This longitudinal descriptive study involved smokers with diabetes mellitus (DM) who were attended for their DM between September 2003 and December 2006. Intervention(More)
Despite the ubiquity of time and temporal references in legal texts, their formal-ization has often been either disregarded or addressed in an ad hoc manner. In this paper we address this issue from the standpoint of the research done on temporal representation and reasoning in AI. We identify the temporal requirements of legal domains and propose a(More)
Iodine is an essential trace element for life. Its biological effects are a consequence of its incorporation to the thyroid hormones, which play a crucial role in fetal organogenesis, and in particular in brain development. This takes place during early gestation and involves delicate targeting throughout the central nervous system, including adequate(More)