Apache Spark is an open-source cluster computing framework. It has emerged as the next generation big data processing engine, overtaking Hadoop MapReduce which helped ignite the big data revolution. Spark maintains MapReduce’s linear scalability and fault tolerance, but extends it in a few important ways: it is much faster (100 times faster for certain applications), much easier to program in d...

Upon activation, mammalian eggs release billions of zinc ions in an exocytotic event termed the "zinc spark." The zinc spark is dependent on and occurs coordinately with intracellular calcium transients, which are tightly associated with embryonic development. Thus, we hypothesized that the zinc spark represents an early extracellular physicochemical marker of the developmental potential of the...

Simulations of forced ignition of non-premixed laminar counterflow flames are used to study the effect of strain rate on ignition success. A one dimensional calculation is performed, using detailed methane chemical kinetics and treating the spark as an instantaneous heat release in an inert mixing layer. Ignition success depends on the mixture composition at the spark location, resulting in lea...

A study of the switching process a short (1 mm) gas gap initiated by spark discharge along dielectric surface was carried out method shadowgraphy with nanosecond time resolution. The presence shock wave propagating from cathode spot and signs intermediate accumulation invested energy in form excitation molecules or turbulent flow were detected. Keywords: shadowgraphy, discharge, waves, switch.

AIMS The cardiac ryanodine receptor (RyR) Ca(2+) release channel homotetramer harbours approximately 21 potentially redox-sensitive cysteine residues on each subunit and may act as a sensor for reactive oxygen species (ROS), linking ROS homeostasis to the regulation of Ca(2+) signalling. In cardiac myocytes, arrayed RyRs or Ca(2+) release units are packed in the close proximity of mitochondria,...

Guidelines for the development of software in safety-critical systems usually restrict programming languages, removing features that are unsafe and/or hard to thoroughly test and certify. There are also recommendations and demands in newer guidelines for the use of formal methods, as a way to achieve high assurance software. SPARK is a strict subset of Ada that was designed to have unambiguous ...

The discharge characteristics of the XeF* (B~X) laser are investigated. The NF3 and Xe partial pressure of the laser gas mixture and the total gas pressure have been varied. A highest specific output energy of 4.7 J/1 with an efficiency of 0.5% was obtained from a X-ray preionized Ne/Xe/NF3 gas mixture at 6 bar with single-pulse excitation through a multichannel spark gap. PACS: 42.55.Gp, 42.60...

In the Spark Erosion machining process, electrical energy in inter-electrode gap gets converted into thermal energy. Whatever generated inter electrode distributed among anode, cathode and dielectric fluid. The workpiece spark erosion process is kept as anode fraction of total which going to (workpiece) should be maximum. As this responsible for melting material on workpiece. This important par...

Scalable distributed dataflow systems have recently experienced widespread adoption, with commodity dataflow engines such as Hadoop and Spark, and even commodity SQL engines routinely supporting increasingly sophisticated analytics tasks (e.g., support vector machines, logistic regression, collaborative filtering). However, these systems’ synchronous (often Bulk Synchronous Parallel) dataflow e...

fundamental motor skills are the bases of special motor skills. in addition tomaturation, environmental promotion can influence these skills. the aim of thisstudy was to investigate and compare the effect of developmental gymnasticinstructional program and spark motor program as motor experiences onfundamental motor skills development in children aged between 6 and 8. for thispurpose, 120 child...