Hybrid Conferences [President’s Column]

Presidents, Vice Presidents, and Death: Closing the Constitution's Succession Gap

Underwriting the presidents.

The United States has had 43 presidents. We examined whether they survive significantly longer or shorter than their contemporaries. We found that survival was better for presidents elected in the 1789-1841 and 1933-2001 periods (SMRs of 0.7 and 0.6, respectively), but worse for those elected in 1845-1929 (SMR = 2.9). We also found increased mortality during the years lived in office (SMR = 1.4...

Presidents who value science.

www.sciencemag.org SCIENCE VOL 323 13 FEBRUARY 2009 843 COVER An image of Mare Moscoviense on the lunar farside, taken by the Terrain Camera aboard the SELENE (Kaguya) spacecraft on 17 January 2008. Crater frequency distributions derived from such images yield ages of about 2.5 billion years for several volcanic deposits in this mare, indicating that volcanism on the lunar farside lasted about ...

Virtuoso, a Hybrid RDBMS/Graph Column Store

We discuss applying column store techniques to both graph (RDF) and relational data for mixed workloads ranging from lookup to analytics in the context of the OpenLink Virtuoso DBMS. In so doing, we need to obtain the excellent memory efficiency, locality and bulk read throughput that are the hallmark of column stores while retaining low-latency random reads and updates, under serializable isol...

Hybrid Row-Column Partitioning in Teradata

Data partitioning is an indispensable ingredient of database systems due to the performance improvement it can bring to any given mixed workload. Data can be partitioned horizontally or vertically. While some commercial proprietary and open source database systems have one flavor or mixed flavors of these partitioning forms, Teradata Database offers a unique hybrid row-column store solution tha...