T he hereditary spastic paraplegias (HSPs) are inherited neurologic disorders in which the primary symptom is insidiously progressive difficulty walking due to lower extremity weakness and spasticity. There have been great strides in our knowledge of this group of disabling disorders; 20 HSP loci and 9 HSP genes have been discovered. Insights into the molecular causes of HSPs are beginning to e...

1550 Emerging Infectious Diseases • www.cdc.gov/eid • Vol. 18, No. 9, September 2012 “A elephant, a ponderous house / A melon strolling on two tendrils” is how Sylvia Plath described herself in “Metaphors.” In addressing her physical condition, the poet was acknowledging the psychological toll of changes to the female body during pregnancy, which she termed “a riddle in nine syllables.” The imm...

We describe the computation of a catalogue containing all matroids with up to nine elements, and present some fundamental data arising from this catalogue. Our computation confirms and extends the results obtained in the 1960s by Blackburn, Crapo & Higgs. The matroids and associated data are stored in an online database, and we give three short examples of the use of this database.

The aim of the paper is to intervene in debates about the digital and in particular three kinds of framings: those that imagine the digital in terms of epochal shifts, or as representing a new era of mobility and flow, or as redefining life. Instead, we explore the lively, productive and performative qualities of the digital by attending to the specificities of digital devices and how they inte...

What are the attributes, characteristics, and tell-tale signs of successful teams, teamwork, and projects? This is an age-old question that dates back to the beginning of time and the formation of human civilization itself. Roman infantry tactics were infamous for their well-balanced blend of flexibility and structure. However, they were often helpless at the hands of faster-moving Persian arch...