MapReduce has emerged as a viable competitor to database systems in big data analytics. MapReduce programs are being written for a wide variety of application domains including business data processing, text analysis, natural language processing, Web graph and social network analysis, and computational science. However, MapReduce systems lack a feature that has been key to the historical succes...

STARFISH is a parallel le system simulator we built for our research into the concept of disk directed I O In this report we detail steps taken to tune the le systems supported by STARFISH which include a traditional parallel le system with caching and a disk directed I O system In particular we now support two phase I O use smarter disk scheduling increased the maximumnumber of outstanding req...

Underwater soft robots are challenging to model and control because of their high degrees freedom intricate coupling with water. In this letter, we present a method that leverages the recent development in differentiable simulation coupled differentiable, analytical hydrodynamic assist modeling an underwater robot. We apply Starfish, customized robot design is easy fabricate intuitive manipulat...

Relationships within the class Asteroidea have remained controversial for almost 100 years and, despite many attempts to resolve this problem using molecular data, no consensus has yet emerged. Using two nuclear genes and a taxon sampling covering the major asteroid clades we show that non-phylogenetic signal created by three factors--Long Branch Attraction, compositional heterogeneity and the ...

Climate warming experiments generally test the ecological effects of constant treatments while neglecting the influence of more realistic patterns of environmental fluctuations. Thus, little is known regarding how the temporal interaction between multiple episodes of thermal stress influences biotic interactions. We measured the sensitivity of predation rate in an intertidal sea star to changin...

The Starfish project at Duke University aims to provide MapReduce users and applications with good performance automatically, without any need on their part to understand and manipulate the numerous tuning knobs in a MapReduce system. This paper describes the What-if Engine, an indispensable component in Starfish, which serves a similar purpose as a costing engine used by the query optimizer in...

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1560 Databanks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1561 Name and History . . . ....

Starfish oocytes were injected with mRNA for the serotonin 1c receptor or with rat brain poly A+ mRNA, incubated to allow expression of the membrane protein, then matured to eggs by addition of 1-methyladenine. Applying serotonin to these eggs caused cortical granule exocytosis like that occurring at fertilization. Because the serotonin 1c receptor specifically activates a G-protein, these resu...