The genomic distance problem in the Hannenhalli-Pevzner theory is the following: Given two genomes whose chromosomes are linear, calculate the minimum number of inversions and translocations that transform one genome into the other. This paper presents a new distance formula based on a simple tree structure that captures all the delicate features of this problem in a unifying way.

We address the problem of providing a logical characterization of reasoning based on stereotypes. Following [6] we take a semantic perspective and we base our model on a notion of semantic distance. While still leading to cumulative reasoning, our notion of distance does, unlike Lehmann’s, allow reasoning under inconsistent information.

BACKGROUND The distance from bone crest to contact point is only the most frequently studied of the many factors that influence whether interdental papilla are present. The purpose of this study was to discover the association between embrasure morphology and central papilla recession. METHODS The central papilla was visually assessed in 310 adults using paralleling periapical radiographs of ...

INTRODUCTION Information regarding hospital arrival times after acute ischaemic stroke (AIS) has mainly been gathered from countries with specialised stroke units. Little data from emerging nations is available. We aim to identify factors associated with achieving hospital arrival times of less than 1, 3, and 6 hours, and analyse how arrival times are related to functional outcomes after AIS. ...

BACKGROUND Multiple micronutrients in powder (MNP) are recommended by WHO to prevent anemia in young children. However, evidences for its effectiveness in different populations and improvements in other outcomes (e.g. linear growth and vitamin A deficiency) are scarce. METHODS A multicentre pragmatic controlled trial was carried out in primary health centres. At study baseline, a control grou...

BACKGROUND Post-exercise muscle soreness is a dull, aching sensation that follows unaccustomed muscular exertion. Primarily on the basis of previous laboratory-based research on eccentric exercise, soreness is usually said to follow an inverted U-shaped curve over time, peaking 24 - 48 hours after exercise. As such, it is often described as "delayed-onset" muscle soreness. In a study of long-di...

We show that if the intersection number c2 > 1 then any weak-geodetically closed subgraph of X is distance-regular. Γ is said to be i-bounded, whenever for all x, y ∈ X at distance δ(x, y) ≤ i, x, y are contained in a common weakgeodetically closed subgraph of Γ of diameter δ(x, y). By a parallelogram of length i, we mean a 4-tuple xyzw of vertices in X such that δ(x, y) = δ(z, w) = 1, δ(x,w) =...