Running appears to decrease knee intra-articular pro-inflammatory cytokine concentration and facilitates the movement of COMP from the joint space to the serum.

As the size and complexity of analytic data processing systems continue to grow, the effort required to mitigate faults and performance skew has also risen. However, in some environments we have encountered, users prefer to continue query execution even in the presence of failures (e.g., the unavailability of certain data sources), and receive a "partial" answer to their query. We explore ways to characterize and classify these partial results, and describe an analytical framework that allows the system to perform coarse to fine-grained analysis to determine the semantics of a partial result. We propose that if the system is equipped with such a framework, in some cases it is better to return and explain partial results than to attempt to avoid them.

In recent years, Massively Parallel Processors have increasingly been used to manage and query vast amounts of data. Dramatic performance improvements are achieved through distributed execution of queries across many nodes. Query optimization for such system is a challenging and important problem.In this paper we describe the Query Optimizer inside the SQL Server Parallel Data Warehouse product (PDW QO). We leverage existing QO technology in Microsoft SQL Server to implement a cost-based optimizer for distributed query execution. By properly abstracting metadata we can readily reuse existing logic for query simplification, space exploration and cardinality estimation. Unlike earlier approaches that simply parallelize the best serial plan, our optimizer considers a rich space of execution alternatives, and picks one based on a cost-model for the distributed execution environment. The result is a high-quality, effective query optimizer for distributed query processing in an MPP.

A new multi mate/demate metal face seal fitting has recently been flight qualified at JPL. The Omnisafe fitting incorporates a torque elimination feature that prevents misalignment of components and damage to the sealing surfaces. This fitting which has been used for ten years in the semiconductor industry and at Lawrence Livermore National Laboratories, has successfully maintained leak integrity after flight qualification testing. Following ten mate/demate cycles, this qualification included exposure to shock & vibration, thermal cycling, and pressure cycling that simulate flight conditions. Fluid delivery applications in xenon gas propulsion and liquid Freon cooling service have been proposed for this fitting. This robust, reusable fitting enables flight subsystems to be built and tested independently and in parallel. Fittings also facilitate late integration of fluid system components, unlike most welded systems. This reusable coupler can be used to modularize flight systems and reduce integration costs.

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