Standing Ovation

The standing ovation problem

Over the last decade, research topics such as learning, heterogeneity, networks, diffusion, and externalities, have moved from the fringe to the frontier in the social sciences. In large part this new research agenda has been driven by key tools and ideas emerging from the study of complex adaptive systems. Research is often inspired by simple models that provide a rich domain from which to exp...

Early experience with ovation endograft system in abdominal aortic disease

OBJECTIVE We describe our initial experience with the use of the TriVascular Ovation endograft system for the treatment of abdominal aortic aneurysms (AAA). METHODS We retrospectively reviewed data from patients treated for AAA using the Ovation endograft at two institutions from January 2011 to September 2012. Main outcomes included primary success, survival, complications, and device-relate...

Endovascular Treatment of InfrarenalAortic Aneurism with Ovation Abdominal Stent Graft System

Abdominal aortic aneurysms (AAAs) are potentially lifethreatening anomalies that usually remains asymptomatic until they expand, rupture or burst. At these last stated stages they may cause sudden, severe and constant lower back and abdominal pain. Endovascular aneurysm repair (EVAR) has revolutionized its treatment as well as all areas of the segment; and it is the most common and indicated tr...

Fractional Standing

Standing Up for Sticklebacks

The morphology of the vertebrate skeleton exhibits tremendous plasticity in evolution, allowing adaptation to a wide variety of ecological niches and lifestyles. Indjeian et al. now uncover how the cis regulation of a gene controls skeletal variation in fish and might have contributed to the evolution of bipedalism in humans.