Blue rubber bleb nevus syndrome: a cause of gastrointestinal hemorrhage

Blue rubber bleb nevus syndrome is an uncommon disorder manifested by cutaneous and gastrointestinal hemangiomas and gastrointestinal hemorrhage causing anemia. We describe a young man who presented with hematemesis and melena and had multiple bluish rubber bleb-like hemangiomas over the body and in the stomach, jejunum and colon. The patient was treated with iron supplements for anemia; he is doing well 6 months later.     

A Beat-to-Beat Heart Rate Meter

A new technique for computing beat-to-beat heart rate using a programmable counter is described. The circuit used is much less complex and consequently more economical than the circuits described elsewhere in the literature. Yet, it achieves acceptable accuracy in the rate measurements. The circuit can be conveniently modified to measure very low-frequency physiological phenomena such as respiration rate.     

Characterization and evaluation of TCP and UDP-based transport on real networks

StandardTcp (RenoTcp) does not perform well on fast long distance networks, due to its AMD congestion control algorithm. In this paper we consider the effectiveness of various alternatives, in particular with respect to their applicability to a production environment. We then characterize and evaluate the achievable throughput, stability and intra-protocol fairness of differentTcp stacks (Scalable,Hstcp,Htcp, FastTcp, Reno,Bictcp, hstcp-lp andLtcp) and aUdp based application level transport protocol (Udtv2) on both production and testbed networks. The characterization is made with respect to both the transient traffic (entry and exit of different streams) and the steady state traffic on production Academic and Research networks, using paths withRtts differing by a factor of 10. We also report on measurements made with 10 Gbit/secNics with and withoutTcp Offload Engines, on 10 Gbit/s dedicated paths set up forSc2004.