Contagious yawning, in which yawning is triggered involuntarily when we observe another person yawn, is a common form of echophenomena-the automatic imitation of another's words (echolalia) or actions (echopraxia) [1]. The neural basis for echophenomena is unknown; however, it has been proposed that it is linked to disinhibition of the human mirror-neuron system [1-4] and hyper-excitability of ...

Contagious bovine pleuropneumonia (CBPP) was recognised on Bako Agricultural Research Farm, in the Oromia Region of Ethiopia, for the first time on 5 May 2011. The outbreak was investigated by combining recognition of clinical signs, post-mortem examination, mycoplasma isolation and serological testing using competitive enzymelinked immunosorbent assay (c-ELISA). The clinical cases were monitor...

Epidemiological reports and post-mortem examination of slaughtered cattle indicate that prevalence of contagious bovine pleuropneumonia (CBPP) in Nigeria is on the increase, despite annual mass vaccinations and other protection measures. The number of reported outbreaks increased from 20 in 1981 to 64 in 1988, 114 in 1989, 82 in 1990 and 52 in 1991 (January to June). Post-mortem examinations co...

We consider the following activation process in d-regular undirected graphs: a vertex is active either if it belongs to a set of initially activated vertices or if at some point it has at least r active neighbors, where 1 < r ≤ d is the activation threshold. Such processes have been studied extensively in several fields such as combinatorics, computer science, probability and statistical physic...

An international trial has found that police officers who wore video cameras attracted fewer complaints. Officers were randomly allocated to wear cameras or not; if they did, they told any members of the public they interacted with. In the year before the study the police received 1539 complaints in the seven experimental sites. This averaged 1.2 complaints per officer before the study, which f...